• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a combustion air cassette (10) for supplying combustion air at different height levels in a combustion chamber of a fireplace. The combustion air cartridge (10) comprises a hollow primary air cartridge (11) and at least one hollow secondary air cartridge connected to the primary air cartridge (11) by an air flow, and an air intake (35). Via the air intake, combustion air is arranged to flow into the primary air cassette (11) and from the primary air cassette (11) to the lower part of the combustion chamber via primary air supply holes (15) on the upper surface of the primary air cassette (11) and to at least one secondary air cassette. (12) for preheating, and from which secondary air cassette (12) the preheated secondary air is arranged to flow into the combustion chamber from at least such secondary air supply holes (16) located at the height level of the upper combustion chamber on top of the wood insert burning on the primary The invention also relates to a fireplace (50) comprising a combustion air cassette (10), a method of supplying combustion air for a wood insert burning in the combustion chamber of the fireplace, to different height levels of the combustion chamber of a combustion air cassette (10). for a combustion air cartridge for a fireplace (50).
    公开号:FI20205176A1
    申请号:FI20205176
    申请日:2020-02-21
    公开日:2021-08-22
    发明作者:Janne Nielikäinen；Tuomas Immonen
    申请人:Turun Uunisepaet Oy；
    IPC主号:
    专利说明:

    Combustion air cartridge, fireplace with combustion air cartridge, method for supplying combustion air and combustion air cartridge retrofit kit
    The present invention relates to a combustion air cassette for a fireplace, a fireplace comprising a combustion air cassette according to the invention, a method for supplying combustion air to a wood insert in a fireplace hearth at different heights of the hearth, and a main combustion air cassette retrofit kit according to the invention.
    Background Serious efforts have been made to limit emissions from burning wood in fireplaces in order to improve air quality.
    When a conventional grate is used in a fireplace and a wood insert, for example chopped firewood, is placed on the grate for combustion, the only combustion air is often primary air passing through the grate arranged below the wood insert.
    The gases released from this wood charge burn with the wood charge, which further increases the heat of the wood charge, which in turn increases gasification.
    As a result, the primary air is not sufficient to burn all the gases released, and thus a large amount of hydrocarbons and soot remain unburned in the fireplace.
    Such combustion with insufficient oxygen supply can lead to higher than desired emissions from wood burning.
    The emission problem due to wood burning is even greater when —the wood input is added to the glowing charcoal during the wood combustion process. & S There are also solutions in which the combustion air comprises, in addition to the primary air, secondary air, which is introduced above the wood charge by separate pipe or cassette or cassette solutions.
    Such a solution has made it possible to reduce particulate matter and carbon monoxide emissions from fireplaces and emissions of non-combustible organic matter.
    From a climate point of view, a greater reduction in N of particulate emissions, carbon monoxide emissions and non-combustible organic matter from fireplaces would be beneficial.
    Summary A combustion air cartridge for a fireplace has now been invented to direct combustion air to a fireplace; the primary air is led from under the wood charge to the lower part of the fireplace - from the primary air cassette of the combustion air cassette and the secondary air cassette of the combustion air cassette there is preheated secondary air to the upper part of the hearth, from one, two or three sides. Conducting secondary air to several different heights inside the furnace according to the height of the upper combustion chamber of the combustible wood charge - enables an adequate supply of oxygen to the combustible wood charge throughout the combustion process; from the initial stage of wood burning, when the fire is ignited and when the wood charge is high, to the final stage of wood burning, when the wood charge has burned to low carbon. the invention also relates to a method for supplying combustion air to a fireplace, a fireplace comprising a combustion air cartridge, and a combustion air cartridge retrofit kit. The invention relates to a combustion air cartridge which directs combustion air to different heights in a fireplace hearth. The combustion air cartridge comprises a hollow primary air cartridge and at least one hollow secondary air cartridge connected to the primary air cartridge by airflow. Through the air intake opening in the lower part of the combustion air cassette, combustion air is arranged to flow inside the primary air cassette and further into the lower part of the furnace under the wood air supply holes to be arranged on the primary air cassette and to heat up at least one secondary air cassette. The secondary air preheated from the secondary air cassette flows into the furnace from at least those secondary air supply holes above the N primary air cassette at the height of the combustion chamber of the wood charge burning.
    N S According to one embodiment, the secondary air supply holes are arranged in the secondary air cassette at at least two different heights. According to one embodiment I 30, the secondary air supply holes are arranged in the secondary air cassette c at several different heights. According to one embodiment, the secondary air supply holes are arranged in the secondary air cassette at several different heights, from the lower part of the secondary air cassette to the upper part of the secondary air cassette. According to one embodiment, the air intake of the combustion air cartridge is arranged below or below the primary air cartridge. According to one embodiment, the
    the air intake of the cassette comprises at least one restrictor to limit the amount of air flowing into the primary air cassette. According to one embodiment, the combustion air cassette comprises two or three secondary air cassettes air-connected to the primary air cassette such that combustion air flows from the primary air cassette to said two or three secondary air cassettes. According to one embodiment, the combustion air cartridge is arranged to be placed on top of the fireplace grate. According to one embodiment, the combustion air cartridge comprises a riser and is arranged to be placed on the bottom of the fireplace.
    The invention further relates to a fireplace comprising a combustion air cassette for conducting combustion air to different heights in a firebox. The combustion air cartridge comprises a hollow primary air cartridge and at least one hollow secondary air cartridge connected to the primary air cartridge by airflow. Through the lower air intake of the combustion air cassette, combustion air is arranged to flow inside the primary air cassette and further into the lower part of the furnace under the wood charge to be arranged on the primary air cassette from the primary air supply holes and into the at least one secondary air cassette. The secondary air preheated from the secondary air cassette flows into the furnace from at least those secondary air supply holes above the primary air cassette at the height of the upper combustion chamber of the wood charge and which combustion air set is arranged in the fireplace so that the secondary air cassette is arranged on either side of the firebox. or on the back wall. According to one embodiment, the secondary air supply holes are arranged in the secondary air cassette at at least two different heights. According to one embodiment N, the secondary air supply holes are arranged in the secondary air cassette N at several different heights. According to one embodiment, the secondary air supply holes are arranged in the secondary air cassette at several different heights, from the lower part of the secondary air cassette to the upper part of the secondary air cassette. According to one embodiment, the air intake of the combustion air cartridge is arranged primarily below or in the lower part of the primary air cartridge. According to one embodiment, the air intake of the combustion air cassette comprises at least one restrictor to limit the amount of air flowing into the primary air cassette. According to one embodiment, the N combustion air cartridge comprises two or three secondary air cartridges which are - airflow connected to the primary air cartridge so that the combustion air flows
    from the primary air cassette to said two or three secondary air cassettes. According to one embodiment, the combustion air cartridge is arranged to be placed on top of the fireplace grate. According to one embodiment, the combustion air cartridge comprises a riser and is arranged to be placed on the bottom of the fireplace. The invention further relates to a method for supplying combustion air to a wood charge burning in the hearth of a fireplace, at different heights of the hearth. The method comprises the steps of: receiving combustion air to the combustion air cartridge through an air intake arranged in the lower part of the combustion air cartridge. In the combustion air cartridge, the combustion air is divided into primary air and secondary air, the primary air is supplied under the wood charge through the primary air supply holes of the primary air cartridge, the secondary air is preheated in the secondary air cartridge and the preheated secondary air is supplied to the fire air. through which are at the height of the upper combustion chamber of the combustible wood charge. According to one embodiment, the method further circulates the secondary air around the air distributor of the secondary air cassette by heating the secondary air in the secondary air cassette before supplying the secondary air to the upper combustion chamber of the wood charge burning in the furnace. According to one embodiment, the method further comprises exchanging the air supply holes used for supplying the preheated secondary air to air supply holes at a level corresponding to the respective upper combustion space of the wood charge burning in the furnace. According to one embodiment, the method further closes the primary air supply holes of the combustion air cartridge N, and continues to supply only the secondary air.
    The invention further relates to a combustion air cassette retrofit kit comprising a combustion air cassette retrofit kit comprising a combustion air cassette comprising a hollow primary air cassette and at least one hollow secondary air cassette airflow coupled to the primary air cassette c. ™ ~ Through the air intake of the lower part of the combustion air cassette, combustion air S is arranged to flow inside the primary air cassette and further into the lower part of the furnace below the primary air supply cassette from the primary air supply cassette and to heat up at least one secondary air cassette.
    The secondary air preheated from the secondary air cassette flows into the furnace from at least those secondary air supply holes on top of the primary air cassette at the height of the combustion chamber of the combustible wood charge. The combustion air set is arranged in the fireplace so that the secondary air cassette is arranged either on the side or rear wall of the firebox 5. According to one embodiment, the secondary air supply holes are arranged in the secondary air cassette at at least two different heights. According to one embodiment, the secondary air supply holes are arranged in the secondary air cassette - at several different heights. According to one embodiment, the secondary air supply holes are arranged in the secondary air cassette at several different heights, from the lower part of the secondary air cassette to the upper part of the secondary air cassette. According to one embodiment, the air intake of the combustion air cartridge is arranged below or in the lower part of the primary air cartridge. According to one embodiment, the air intake of the combustion air cartridge comprises at least one restrictor to limit the amount of air flowing into the primary air cartridge. According to one embodiment, the combustion air cartridge comprises two or three secondary air cartridges air-connected to the primary air cartridge so that combustion air flows from the primary air cartridge to said two or three secondary air cartridges. According to one embodiment, the combustion air cartridge is arranged to be placed on top of the fireplace grate. According to one embodiment, the combustion air cartridge comprises a riser and is arranged to be placed on the bottom of the fireplace. —Short description of the drawings
    S N Various embodiments of the invention will be described in more detail below with reference to the accompanying drawings, in which
    Fig. N 30 shows a top view of a combustion air cassette according to an embodiment of the invention in a perspective view,
    R S Fig. 1b shows a top view of a combustion air cassette according to an embodiment of the invention in a perspective view,
    Fig. 2a shows a top perspective view of a combustion air cartridge according to an embodiment with the primary air supply holes open, Fig. 2b shows the combustion air cartridge of Fig. 2a with the primary air supply holes closed, Fig. 3a shows a top view AA, Fig. 3c shows a cross-sectional view of the combustion air cartridge of Fig. 3a at line BB, Fig. 3d shows a bottom view of the combustion air cartridge of Fig. 3a, Fig. 3a shows a cross-sectional view of the combustion air cartridge of Fig. 3d at line CC, Fig. 3f shows a bottom view of the second Figures 4a-f each show a top perspective view of a combustion air cartridge according to an N embodiment of the invention,
    Fig. 5a shows a front view of a fireplace comprising a combustion air cartridge according to an embodiment of the invention,
    Fig. 5b shows a line D-D of the cross-section of the fireplace of Fig. 5a of the invention
    Along LO S, O
    Figures 6a-d each show a cross-sectional side view of the combustion process of a wood charge in connection with a combustion air cassette according to an embodiment of the invention; Fig. 7a shows a front view of a combustion air cartridge according to an embodiment of the invention and its airflows, Fig. 7b shows a top view of a combustion air cartridge and its airflows, Fig. 8 shows a cross-sectional view Fig. 9b shows a front perspective view of a combustion air cassette for a grateless fireplace according to an embodiment of the invention, Fig. 9c -
    S N Figure 10 shows a method for supplying combustion air to the fireplace S at different heights,
    Fig. N 30 shows a perspective view from above of a combustion air cartridge for a heater according to an embodiment of the invention, R
    LO S Fig. 11b shows a perspective view from above of a combustion air cartridge for a stove according to an embodiment of the invention, and Fig. 11c shows a perspective view from above of a combustion air cartridge according to an embodiment of the invention.
    Detailed description
    A fireplace can mean ordinary fireplaces, heat storage fireplaces, fireplaces, hearths, open fireplaces and stoves used to heat detached houses or other buildings or spaces.
    However, burning wood in fireplaces causes emissions and particles from the burning of wood, sometimes even significant amounts, if there is not enough air, ie oxygen, available for the wood input.
    From a climate point of view, emissions and particles from the combustion of wood, especially impure ones, and black carbon, which accelerates climate change, are - an unwanted by-product of wood burning processes in fireplaces.
    For example, when a conventional slot grate is used in a fireplace and a wood batch, such as firewood, is placed on that grate, the primary air passing through the grate placed under the wood batch may be the only combustion air in the wood burning process.
    In this case, the gases released from the wood charge burn with the wood charge, which further increases the heat of the wood charge, which in turn increases the gasification.
    And the primary air is usually not enough to burn all these released gases.
    The emission problem is further exacerbated when new firewood is added to the charcoal of a hot wood charge during the combustion process. - By arranging a sufficient amount of air for burning the wood charge, not only below the wood charge N (primary air), but also especially just above the wood charge, i.e. N so-called in the upper combustion chamber of the fire, where the flames are and where the combustion of the gaseous substances of the wood takes place (secondary air), the amount of particles generated by the combustion of the wood can be reduced by up to 90%. Such conduction of combustion air to where it is most needed in each case can be realized with a combustion air cartridge according to embodiments of the present invention, which delivers combustion air consisting of both primary and secondary air to different S heights in the furnace.
    The combustion air cassette comprises a horizontal hollow primary air cassette to be placed on top of e.g.
    A portion of the primary air from the combustion air flowing into the combustion air cartridge exits the primary air cartridge through primary air supply holes arranged in the upper surface of the primary air cartridge on which the wood charge is burned.
    No primary air flows from the primary air cartridge into the firebox other than through the air supply holes on its upper surface, e.g. from the sides or front of the primary air cartridge.
    In addition to the horizontal primary air cartridge, the combustion air cartridge comprises at least one generally vertical hollow secondary air cartridge into which a portion of the secondary air from the combustion air flows to preheat, for example, through the primary air cartridge.
    The secondary air cartridge or cartridges may also be at an angle to the primary air cartridge so that the cartridge or cartridges are tilted away from the primary air cartridge, i.e., the center of the combustion air cartridge.
    The secondary air cassette has secondary air supply holes at different heights in the so-called front surface of the secondary air cassette, which faces the firebox when the combustion air cassette is in the firebox, so that the secondary air cassette can always the height thus depends on the stage of the wood combustion process and / or the amount of firewood on top of the primary air cassette.
    The preheated secondary air supply ensures the most complete combustion of the gases from the burning wood charge by providing the correct / sufficient amount of oxygen to the gases in the upper combustion chamber.
    The more turbulent the secondary air flow, the better the gases and combustion air mix in the furnace and the cleaner the combustion.
    Thus, the combustion air cartridge according to embodiments of the present invention oxidizes the wood combustion process more efficiently, resulting in even less emissions and particles, because the wood charge burns more efficiently and cleaner when air is led not only from under the wood charge but also to the upper combustion chamber. , into flames.
    The diameter of the air supply holes can be, for example, 2-30 mm, for example 10 mm, 15 mm or N 20 mm in both primary and secondary air cassettes.
    The air supply reefs may also have collars away from the surface of the I 30 cassettes in some embodiments.
    In addition, in some embodiments, the air feeders of the cassettes may have a different diameter than other air supply rollers or air supply rollers at different heights in the secondary air cassette.
    The area of the air supply holes of the secondary air cassette must be less than or equal to the area of the air intake opening of the lower part of the secondary air cassette through which air flows into the secondary air cassette in order to provide combustion air and gas.
    mixing in the furnace, efficient preheating of the secondary air in the secondary air cassette, and a sufficiently large volume flow to the secondary air cassette. In this way, the flow of air through the secondary air cartridge is accelerated and a sufficient amount of secondary air is obtained in the furnace at the right place in the combustion process at each time of the combustion process.
    The operation of the combustion air cartridge according to embodiments of the present invention is thus based on oxidation of the combustion process according to the combustion stage, i.e. combustion phasing, turbulent mixing of combustion air and gases, efficient supply of air to the upper combustion zone, and secondary air preheating. These, when optimized in the right way, reduce total emissions, gases, particulates and black soot. Combustion phasing refers to the ratio of the primary and secondary airflow feeds to the combustion zone and can be accomplished by the combustion air cassette primary air cassette and at least one secondary air cassette in which the secondary air is heated by a combustion process before the secondary air is supplied to the furnace. . Preheated secondary air contributes to reducing emissions from wood burning. The thermal energy released from the combustion process on top of the primary air cassette heats the air mass inside the secondary air cassettes with radiant heat, as well as convection. The higher and accelerated air flow to the secondary air cassette is due to the thermal expansion of the air volume in the secondary air cassette caused by the temperature change, the flue vacuum in the entire firebox and their combined effect. the surface area of the air intake has a significant effect on the air velocity inside the secondary air cassette. This creates N pressure differences between the furnace and the secondary air cartridge, and between the secondary air cartridge and its air intake, i.e. the lower part of the secondary air cartridge. By adjusting the ratio of the area of the hole in the lower air portion of the secondary air cassette, i.e. the hole from which the air flows into the secondary air cassette, to the area of the primary air cassette air intake, i.e. the combustion air cassette air intake, ™ ~, and by adjusting the ratio of these areas to the change in secondary-stack and furnace temperatures, the combustion process can be optimized for lower emissions. It is easier to adjust the air volumes for the combustion process by using a primary air cassette according to the invention instead of a slit grate.
    The turbulence of the air flow increases more strongly in the contractions of the combustion air cartridges, which also accelerate the air flow.
    With the combustion air cassette and cassette, the air flow can be restricted in the air intake duct, i.e. the air intake opening of the primary air cassette, by arranging its area smaller than the cross-sectional area of the primary air cassette.
    The air can be further throttled with both primary and secondary air supply refs.
    The chokes can thus be used to strengthen the turbulence of the air flow and to increase the velocity of the air flow, which helps to mix the gases and combustion air from wood combustion.
    - in the furnace and thus contribute to reducing emissions.
    Air is supplied to the furnace from primary and secondary air supply holes, which can be used to supply sufficient oxygen to several individual focal points in the furnace.
    The air supply holes are located in the combustion air cassette - parallel to the X and Y axes, so that air can be supplied comprehensively to the entire area of the wood charge.
    That is, the combustion air cassette directs air to the lower part of the fireplace hearth below the wood charge by the air supply reflexes of the primary air cassette and to different heights by air supply reflexes arranged at several different heights of the at least one secondary air cassette.
    The ability to introduce primary air under the wood charge inside the fireplace, i.e. the furnace, enables an adequate supply of air and oxygen to the wood charges during ignition.
    And the ability to bring secondary air to different heights inside the fireplace, i.e. the furnace, allows sufficient supply of air and oxygen to the fire in the upper combustion chamber, i.e. the firewood, throughout the wood burning phase, i.e. the combustion process.
    With secondary air cassette. thus, air can be introduced onto the wood charge into the upper combustion chamber, from the beginning of the wood burning stage N when the fire is ignited and when the pile is high, to the end of the wood burning stage N when the wood charge has almost burned to charcoal.
    The secondary air cassette can also supply air to the full height of the firewood charge if the charge N is not placed against the secondary air supply holes, although the most efficient I 30 min air always flows into the upper combustion chamber of the fire.
    The combustion air cartridge according to embodiments of the present invention may also be a retrofit or refurbishment kit for a fireplace when the combustion air cartridge is raised on an existing grate S so that the primary air cartridge is located on top of the grate and the secondary air cartridge (s). against the walls of the furnace, on one, two or three sides.
    The combustion space of the wood charge remains at the grate, but on top of the primary air cassette instead of the grate. The combustion air cartridge according to embodiments of the invention can also be a retrofit or renovation kit for a grateless fireplace. In this case, the combustion air cartridge is provided with elevations and the cartridge is placed on the bottom of the fireplace. It should be noted, however, that the combustion air cartridge according to embodiments of the invention may also be a pre-integrated part of the fireplace. As already mentioned above, when a sufficient amount of air is made available just above the wood charge when burning wood, the amount of particles can be reduced by up to 90%. Although there are several air supply holes in the secondary air cassette that are not covered by the wood charge, the upper combustion chamber is the main area to which the secondary air is mainly conducted because the vortex of the upper combustion chamber causes secondary air to flow from the secondary air supply openings. at the height of the hearth. Thus, the structure of the secondary air cassette, which has several air supply holes arranged at different heights, is suitable for producing air in the upper combustion chamber at all stages of wood burning, from start to finish, thus making the combustion process more efficient and cleaner. The diameter of the secondary air supply holes can be, for example, 2-30 mm, for example 10 mm, i.e. they are quite point-like. If the air supply holes are very large or vertically elongated, the secondary air may not flow at exactly the right height into the furnace and / or turbulent and / or fast and / or the desired temperature to make the combustion process as clean as possible, even if the combustion process produces less when using larger or elongated holes. - Embodiments of the invention will now be described in connection with Figures 1-8. It should be noted, however, that the invention is not limited to the embodiments shown. In fact, different embodiments can be combined and applied S in any environment where a combustion air cassette can be used, N even in a sauna heater or yard grill. Some of the combustion air cassettes I 30 of the images are shown in cross-sectional views in order to show more clearly the location of the air intake openings and air supply holes c in the combustion air cassettes.
    RS Figure 1a is a top perspective view of a combustion air cassette 10 according to an embodiment of the invention. in a first part of the cassette 10, which is the lower part of the cassette 10, for taking air inside the hollow body of the combustion air cassette 10 so that air flows both to the primary air cassette 11 and to the secondary air cassette 12 connected thereto via the primary air cassette 11.
    Examples of air intakes are shown in Figures 3d and 3f, for example.
    The combustion air cassette 10 has both a plurality of primary air supply holes 15 for conducting primary air out of the primary air cassette body 11 for a wood charge disposed on the primary air cassette 11 and secondary air supply holes 16 for conducting secondary air out of the secondary air cassette body 12. for a wood charge arranged on top of the air cassette 11.
    The primary air supply holes 15 are arranged on the upper surface of the primary air cassette 11 and the secondary air supply holes 16 are arranged on the front surface of the secondary air cassette 12 so that the holes 16 are on the furnace side of the cassette 12. The cassettes 11 and 12 - are connected to each other so that the primary The surfaces of the air supply holes 15, 16 facing the fireplace of the air cassette 11 and the secondary air cassettes 12 are at an angle of about 90 degrees to each other.
    However, it is also possible to arrange the secondary air supply holes, for example on the sides of the secondary air cassette which are not facing the firebox and the burning wood charge.
    The number of air supply holes 15, 16 and their locations / height can be freely selected, for example according to the fireplace, but they are essentially in several different places.
    the same surface of the cassettes 11 or 12.
    The combustion air cassette 10 is arranged to be placed inside the fireplace so that its secondary air cassettes 12 are located against / near the furnace walls, in this embodiment of the three secondary air cassettes 12 and against the rear and side walls of the N fireplace hearth and the primary air cassette 11, S that the primary air cassette 11 is on the hearth of the fireplace and the air intake is down-N so that air can flow from the air intake to the combustion air cassette 10 and further through the I 30 cassettes 11, 12 from the air supply holes 15, 16 to the firebox.
    The primary air supply holes 15 of the primary air cassette 11 are arranged to be adjustable in size, they can be completely closed or their opening can be limited by using the air regulator 18 of the combustion air cassette 10, the position of which moves the metal plate in front, either in part or in full.
    Closing the primary air may be necessary, for example, when I want to limit the combustion air and the combustion event with the amount of primary air coming through the lower part, when the wood charge has already ignited. Inside the body of the hollow secondary air cassette 12, the air is preheated when a wood charge is burned on top of the primary air cassette 11 on top of the grate. Secondary air preheated through the secondary air supply holes 16 of the secondary air cassette 12 is arranged to flow from the secondary air cassette 12 to the fireplace and above the combustible wood charge arranged on the primary air cassette 11 and to the upper combustion chamber. The idea of the air supply holes 12 arranged at different heights from the bottom of the fireplace is that the preheated secondary air can always be led to the flame of the top of the wood insert, regardless of the stage of combustion and / or the height of the wood insert. It is possible that the preheated secondary air is also led to other heights, but mainly at least to the height of the top of the wood insert. The combustion air cartridge 10 and its secondary and primary air cartridges 12, 11 may be made of, for example, stainless steel or black iron. The thickness of the material can be, for example, 1-10 mm. It is further possible that the combustion air cartridge 10 has more than one air intake, the air intake is divided, or that at least one air intake is located in a part of the cartridge other than the bottom of the cartridge 10. For example, the cassette 10 may comprise at least one air intake at the rear of the cassette 10 or at one or two edges of the cassette 10, for example at the bottom of the cassette 10. In addition, it is possible that air is introduced into the cassette 10 from outside it - the space where the fireplace is.
    Fig. 1b shows a combustion air cartridge 19 according to an embodiment of the invention in a perspective view from above. The combustion air cartridge set 19 of this embodiment differs from the combustion air cartridge 10 of Fig. 1a in that its secondary air supply holes 16 are elongate, i.e., elongate and vertical, whereby the combustion air cartridge 19 is capable of producing secondary air at multiple heights, even if there are no holes. at several different heights. Due to their shape, the secondary air supply holes 16 of Fig. 1b may be larger in area than the total secondary air supply holes 16 of Fig. 1a in total, which may slow down the
    kundar air flow rate to the furnace and reduces turbulence with respect to the embodiment of Figure 1a because the air constriction is less at large refs.
    In this embodiment of Fig. 1b, the primary air supply holes 15 of the primary air cassette 11 are also elongated, but could also be similar to the combustion air cassette 10 of Fig. 1a. can be limited by using the air regulator 18 of the combustion air cassette 19, the position of which, by adjusting the metal plate, moves in front of the openings 15 in the primary air cassette 19 either partially or completely. Fig. 2a shows a top perspective view of a combustion air cassette 20 according to an embodiment with the primary air supply holes 21 open and Fig. 2b shows the combustion air cassette 20 of Fig. 2a with the primary air supply holes 21 closed to prevent the primary air flow, with only the combustion air flowing secondary air. Closing is accomplished by moving the perforated / orifice adjustment plate within the primary air cassette of the combustion air cassette 20 by means of an air regulator 22. The size of the air supply holes 21 can be reduced or they can be closed completely. When the holes in the control plate are fully aligned with the air supply holes 21, the holes 21 are fully open; when the holes in the control plate are partially aligned with the air supply holes 21, the holes 21 are partially open / closed and the not at all aligned with the air supply holes 21, so that the holes 21 are completely closed, i.e. no primary N air flows into the furnace at all. It is also possible that the air regulator N 22 and the adjustment plate can close / adjust only a part of the holes, for example S those holes 21 which are in the middle of the primary air cassette 23 and on which the N wood insert is mainly placed or the holes in the middle can be left x 30 without closing / escorting. Fig. 3a shows a top view of a combustion air cartridge S 30 according to an embodiment. , only the primary air intake of the combustion air cartridge 30 (35 in Figures 3b-3f)
    to the air cassette 31 and from the primary air cassette 31 through the primary air supply holes 33 to the furnace and from the primary air cassette 31 to the secondary air cassettes 32 and from the secondary air cassettes 32 further through the secondary air supply holes 34 to the firebox to the respective upper combustion chamber.
    Figures 3b show a cross-sectional view of the combustion air cartridge 30 of Figure 3a taken along line A-A. In this angle of view, the air intake 35 is at the bottom. The secondary air cassettes 32 intended against the side walls of the firebox rise perpendicularly upward from the edge areas of the primary air cassette 31. A portion of the primary air supply holes 33 and the secondary air supply holes 34 are also shown in this Figure 3b. Figures 3c show a cross-sectional view of the combustion air cartridge 30 of Figure 3a taken along line B-B. Also in this angle of view, the air intake opening 35 is at the bottom. From the primary air cassette 31, the secondary air cassette 32 for the rear wall of the firebox exits perpendicularly upwards. A portion of the primary air supply holes 33 and the secondary air supply holes 34 are also shown in Figure 3c. Fig. 3d shows an alternative embodiment of the combustion air cassette 30 of Fig. 3a from below, i.e. from the bottom direction. Through the air intake opening 35 in the bottom of the primary air cassette 31, the primary air supply holes 33 are also visible from below. The area of the air intake opening 35 of the combustion air cassette 30 is smaller than the cross-sectional area of the primary air cassette 31. Fig. 3e shows a cross-sectional view of the combustion air cartridge 30 of Fig. 3d at line N C-C. In this angle of view, the air intake 35 is shown at the top N and the secondary air cassettes 32 exit perpendicularly downward from the primary air cassette 31. Some of the primary air supply holes 33 and the secondary air supply N holes 34 are also shown in this Fig. 3e. Fig. 3f shows from below a alternative embodiment of the combustion air cassette 30 of Fig. 3a ™ ~ from below, i.e. from the bottom direction. In this embodiment, the size of the area of the air intake 35 of the primary air cassette 31 is limited by closing the corner areas of the air intake 35, i.e. preventing air from passing through the corners of the air intake 35 into the combustion air cassette 30. These metal pieces covering part or parts call the air intake restrictors 36. The primary air supply holes 33 are also visible through the air intake port 35. In this embodiment, the area of the air intake port 35 of the combustion air cartridge 30 is proportionally even smaller than the cross-sectional area of the primary air cartridge 31 when compared to Fig. 3d. The number of stops 36 may be different and they may be at a different point in the air intake opening 35 than shown in this embodiment.
    Figures 4a-e each show an oblique perspective view of a combustion air cassette according to an embodiment of the invention. The combustion air cartridge 40 of Figure 4a has a horizontal primary air cartridge and two vertical secondary air cartridges vertically connected to the primary air cartridge, one for the side wall of the furnace and the other for the rear wall. Between / between the corners of the secondary air cassettes there is an angular guide 47 intended to prevent secondary air from flowing out of the area between or between the cassettes, e.g. behind the combustion air cassette 40. The structure of the guide 47 is not hollow, so no air flows from the cassettes to each other or to the guide 47. The guide 47 can also be of a different design, i.e. it can connect the cassettes to each other without an angle.
    The combustion air cartridge 41 of Figure 4b has a horizontal primary air cartridge and two vertical secondary air cartridges connected vertically to the opposite side walls of the furnace. There is no guide between the secondary air cassettes in this embodiment, but the secondary air cassettes are separate from each other and are connected and attached only to the primary air cassette - to allow air to flow from the primary air cassette to the second N air cassettes.
    N S The combustion air cartridge 42 of Figure 4c has a horizontal primary air cartridge and N vertically one secondary air cartridge connected to the primary air cartridge. The Se-I 30 kundar air cassette is intended for the (right) side wall of the furnace in this embodiment.
    R S The combustion air cartridge 43 of Figure 4d has a horizontal primary air cartridge and | one secondary air cassette connected vertically to the primary air cassette. In this embodiment, the secondary air cassette is intended for the rear wall of the furnace.
    The combustion air cassette 44 of Figure 4e has a horizontal primary air cassette and two secondary air cassettes connected to the primary air cassette for opposite sidewalls of the furnace. Between / between the secondary air cassettes there is a guide 48 of almost the size of the rear wall of the firebox, which is also intended to prevent secondary air from flowing out of the area between or between the cassettes, e.g. behind the combustion air cassette 44 and directing air to the fire itself. The structure of this guide 48 is also not hollow, so no air flows from the secondary air cassettes to each other or to the guide 48. The guide 48 can also be of a different design than in the figure, i.e. it can connect the cassettes to each other, e.g. with a gentle arc. The combustion air cassette 45 of Fig. 4f has a horizontal primary air cassette horizontally and three vertical secondary air cassettes connected vertically to the primary air cassette, intended for opposite side walls and a rear wall of the furnace. There is no guide between the secondary air cassettes in this embodiment, but the secondary air cassettes are separate from each other and are connected and attached only to the primary air cassette to allow air flow from the primary air cassette to the secondary air cassettes.
    Figure 5a is a front view of a fireplace 50 comprising a combustion air cassette 51 according to an embodiment. A primary air cassette 55 is provided - on top of a furnace 53 slit grate (not shown). On the side where the door 59 N of the furnace 53 (shown in Fig. 5b) is located, there is no secondary air cassette, but the supply and ignition of the wood charge takes place over the primary air supply holes of the primary air cassette 55 (shown in Fig. 5b). Combustion air can flow into the combustion air cassette 51 from the surrounding room or directly from outside the house, for example through an ash hatch 52. Inside the combustion air cartridge 51, a portion of the combustion air flowing through the grate openings / slots into the combustion air cartridge 51, i.e., secondary air, is preheated in the secondary air cartridges 57 before flowing through the secondary air supply holes 54 of the combustion air cartridge 51 to flames N and fire to the respective combustion chamber. The rest of the combustion air, i.e. the primary air, in turn flows without major heating through the primary air supply holes 58 (shown in Figure 5b) of the primary air cassette 55 to the lower part of the furnace 53, under the wood charge, at several points when the wood charge is ignited.
    Figure 5b shows a horizontal cross-section of the fireplace 50 of Figure 5a and the combustion air cassette 51 along the line D-D. Figure 5b shows the primary air cassette 55 and its primary air supply holes 58. In this embodiment, the supply holes 58 are circular, as are the air supply holes 54 of the secondary air cassettes 57, but may also be, for example, oval, elongate or rectangular. The size of the supply holes 54, 58 may also be different from each other, or the same cassette may have holes of different sizes, or the elongate holes may have only one (or more) secondary air cassette height levels.
    It should also be noted that the height and width of the combustion air cartridge 51 and the number of secondary air cartridges 57 can be freely selected, for example, based on the size and / or shape of the firebox 53 of the fireplace 50. In addition, the secondary air cartridges 57 may be of different sizes from each other.
    Figures 6a-6d show the combustion process of a wood charge in connection with a combustion air cartridge 60 according to an embodiment of the invention. A combustion air cassette 60 is arranged on the grate (not shown) in the fireplace and a pile of firewood 61 is arranged on the primary air cassette 62 of the combustion air cassette 60. There are flames 63 above the trees 61. Figures 6a-6d show for clarity or one a cross-sectional view of the secondary air cassette 64, although there could be 2-3 secondary air cassettes. The supply of combustion air to the combustion air cartridge N 60 is shown in Figures 6a-6d by arrows 67.
    S N In Fig. 6a the combustion process is just beginning, in the initial stage, the wood input I 30 - is being ignited and the firewood pile 61 acting as a wood input is high. c Flame 63 is really small and still low. There is not much secondary air flowing from the secondary air cassette 64 yet, because the burning wood charge has not yet heated the air of the secondary air cassette 64 much. The thin arrows from the air supply holes 66 of the second N dary air cassette 64 indicate a small secondary air flow over the entire wood charge area. As the combustion process has just begun, the primary air is supplied under the wood charge to several different points in the primary
    from the air cassette 62, through the air supply holes 62a of the primary air cassette 62. At several different primary air delivery points, it is possible to ensure an adequate supply of oxygen during the ignition phase and the ignition of the entire wood charge immediately at the beginning of the combustion process. If the primary air is led to be supplied only in the vicinity of the furnace door, i.e. from the front of the furnace, then the entire area of the wood charge may not receive a sufficient amount of primary air. The amount of primary air is adjustable by the air regulator 69 of the primary air cassette 62, so that its amount for the wood charge can be limited as the combustion process proceeds and thus prevents combustion of it is sufficient to burn all the gases released from the combustible wood charge, and thus a large amount of hydrocarbons and soot remain unburned and higher-than-desired emissions from burning wood can occur. The primary air supply, i.e., the air supply openings 62a of the primary air cassette 62, can be closed by an air regulator 69 by means of which the refitted metal plate 69a can be moved inside the primary air cassette 62 in front of the air supply holes 62a after the preheated secondary air The amount of primary air - can be reduced by adjusting, i.e., reducing the size of the air supply holes 62a of the primary air cassette 62 by the air regulator 69. In this case, combustion is more complete and cleaner as the with air, because then all the combustion air flowing into the combustion air cartridge 60 is supplied to the combustion process as preheated secondary air.
    S N In Figure 6b, the combustion process has progressed and the combustion process is in the full-fire phase. The secondary air is preheated and flows into the furnace. This N largest secondary airflow points are indicated by arrow 65, the smaller I 30 arrows from the air supply holes 66 of the secondary air cassette 64 indicate a smaller c secondary airflow that can be fed over the entire wood charge area. The amount of primary air has already been reduced by adjusting or reducing the size of the air supply holes 62a of the primary air cassette 62 by the air regulator 69 by means of which the perforated metal plate 69a can be moved inside the primary air cassette 62 - partially in front of the air supply holes 62a.
    In Figure 6c, the combustion process has progressed to the middle stage and the wood input is lower. The combustion process is in the middle stage. The combustion air is here led to the upper combustion chamber of the fire as secondary air and from the lower secondary air supply hole 66 compared to Fig. 6b. This maximum secondary airflow is again indicated by the arrow 65. The primary air supply is already completely shut off by closing the air supply holes 62a of the primary air cassette 62 with an air regulator 69 by means of which the perforated metal plate 69a is moved inside the primary air cassette 62. in front of the air supply holes 62a.
    - In Figure 6d, the combustion process has continued and the wood charge has burned almost completely. The combustion process is in the final stages. The combustion air is still preheated secondary air and the largest amount of it is again led to the upper combustion chamber of the fire, but from an even lower secondary air supply hole 66. This secondary air flow is again marked by arrow 65.
    Figure 7a shows a front view of a combustion air cassette 70 according to an embodiment of the invention and its airflows. The combustion air cartridge / O comprises a primary air cartridge 72 and three secondary air cartridges 71. The combustion air 75a flows into the combustion air cartridge 70 through an air intake port 75, i.e., an intake duct. Combustion air - can flow into the combustion air cassette from the 70 surrounding rooms or directly from outside the house, for example through an ash hatch. In the primary air cassette 72 of the combustion air cassette 70, the combustion air 75a is divided into a primary air / 4a flowing into the furnace through the primary air supply holes 74 (not shown) under the primary air cassette 72 and preheated and heated in the secondary air cassette 71 secondary air 73a flowing through the air supply holes 73. In this N embodiment, the arrows of the primary air 74a and the arrows of the secondary air S 73a are equally strong and long, although the ratios and amounts of primary and secondary air volumes fed to the furnace may vary at different stages of the z 30 fire process and at different cassettes. depending on e.g. the location of the wood charge, the stage of the combustion process, the height of the wood charge, the temperature, etc. For example, at the beginning of the combustion process, after the ignition stage, the amount of primary air 74a may be 80% or more of the combustion air fully open), but again during the most intense phase of the fire the amount of secondary air 73a increases, it may be e.g.
    50-90% or more if the sizes of the primary air supply holes 74 have been reduced or closed by the controller 76 (shown in Figure 7b), and at the end of the combustion stage the amount of secondary air 73a is 100% if the primary air supply holes 74 is closed. The percentages at different stages of the fire process may vary depending on the factors mentioned above. Figure 7b shows a top view of the combustion air cassette 70 of Figure 7a and its airflows. Fig. 8 is a cross-sectional view of a combustion air cartridge 80 according to an embodiment of the invention similar to line BB in Fig. 3a. This combustion air cartridge 80 shows air distributors 86 within the secondary air cartridges 82. the incoming air travels a longer distance in them and thus is also subjected to more heating, the secondary air has 82 ns in the secondary air cassettes. double cycle. In this case, too, air flows to the secondary air cassettes 82 from the primary air cassettes 81 to which it has flowed from the air intake 85. The secondary air in the cassettes 82 travels up the outer edge of the cassettes 86 between the outer edge no secondary air supply holes 84. Upon reaching the top of the secondary air cassette 82 where the air distributor 86 terminates, the secondary air turns to flow down the cassette 82 and exits the secondary air cassette 82 at an air supply port (s) at a suitable location for the fire process. 84 furnaces. It is possible that all of the secondary air cassettes 82 of the combustion air cassette 80 have an air distributor or only a portion of the secondary air cassettes 82.
    Fig. 9a is a front perspective view of a combustion air cassette 90 according to an embodiment N of the invention for a grateless fireplace such as an open fireplace S or the like. This combustion air cassette 90 comprises, in addition to the primary air cassette 91 N and the secondary air cassettes 92, an extension 93. The combustion air cassette 90 according to the embodiment is arranged to be placed especially on the bottom of the grate c fireplace. Elevation 93 allows combustion air to be drawn in through the lower end of the combustion air cartridge 90, below the primary air cartridge 91. In this embodiment, there is a separate extension portion N under each secondary air cassette 92, but the increase 93 may also be uniform for all secondary air cassettes 92, such an increase being shown in Figure 9b. The walls in front of the risers of Fig. 9a, i.e. towards the center of the cassette 90, are not up and thus the combustion air flows into the combustion air cassette 90 in addition to the air intake (not shown in Fig. 9a) below the primary air cassette 91 at an angle of e.g. The angle can also be smaller. When air does not enter the combustion air cartridge 90 at a 90 ° angle, it flows more easily into the cartridge 90 and the flow is more efficient. If the combustion air flowing into the combustion air cassette 90 impinges on the wall of the cassette 90 at an angle of 90 °, back pressure may be created and the cassette 90 will not operate at the desired efficiency or at all. Also in other parts of the elevation 93, an air intake opening can be provided in addition to - or instead of - the air intake openings 94 now shown. Fig. 9b is a front perspective view of a combustion air cassette 90a according to an embodiment of the invention also for a grateless fireplace such as an open fireplace. This combustion air cartridge 90a comprises a primary air cartridge 91, secondary air cartridges 92 and a riser 95. In this embodiment, all combustion air enters the combustion air cartridge 90a from the direction in which the opening 95 is left, in this embodiment through the front of the combustion air cartridge 90a. In this case, the flow of combustion air into the combustion air cassette 90a can be facilitated by arranging the elevation 95 so high that the combustion air can flow at a gentle angle to the cassette 90a. If the elevation 95 is very low, e.g., less than 3 cm, then the combustion air does not flow into the cartridge 90a as smoothly as in the embodiment of the previous figure 9a or at a high elevation, and the combustion air cartridge 90a may not operate as efficiently. Fig. 9c is a front perspective view of the combustion air cassette 90 according to the embodiment of Fig. 9a. 96. The purpose of the glass 96 is to increase the I 30 vacuum formed in the combustion air cartridge 90 relative to the environment of the cartridge 90 and thus enable the combustion air cartridge 90 to operate as efficiently as possible. Instead of tempered glass 96, any other suitable material can be used, but glass as material S allows the combustion process to be monitored. O
    N - Fig. 9d is a front perspective view of the combustion air cartridge 90 according to the embodiment of Fig. 9c. This combustion air cartridge 90 comprises a primary
    in addition to the air cassette 91, the secondary air cassettes 92, the extension 93, and the glass 96 on the non-air cassette side of the combustion air cassette 90, a hood 97 is placed on the combustion air cassette 90. the most efficient operation possible. Hood 97 can also be used without glass 96, just as glass 96 can be used without hood 97.
    The air supply holes of the primary air cartridges 91 of the combustion air cartridges 90, 90a of Figures 9a-9d are also adjustable by a controller to limit or close the supply of primary air when it is desired to use mainly or only secondary air as the combustion air. The elevations shown in Figures 9c-9d may be of a different design from those shown in the figures, as long as they allow the combustion air cassette to receive combustion air. Also, the hood 97 in Figure 9d is just an example - of a possible hood model. Glass 96 and / or hood 97 can also be used with the combustion air cartridge 90a of Figure 9b. Figure 10 shows a method 100 for supplying combustion air to different heights The height of the supplied secondary air in the fireplace depends on the level of the burning wood charge and the secondary air is fed into the upper combustion chamber of the burning wood charge. The primary air is fed under the wood charge. In step 101, the combustion air flows into the combustion air cartridge through an air intake port arranged in the lower part of the combustion air cartridge, in which the combustion air is divided into primary air N and secondary air N flowing from the primary air cartridge to the secondary air cartridge. That is, in step 101, the combustion air cartridge receives combustion air. In step 102, the primary air is supplied below the wood charge through the air supply holes in the upper surface of the primary air cassette. In step 103, the I 30 - barar air is preheated in the secondary air cassette. The method may also include step 103a, in which the secondary air circulates / circulates around the air distributor of the secondary air cassette, if any, i.e., when preheating the secondary air in the secondary air cassette, the secondary air N makes the so-called double cycle. In step 104, the preheated secondary air is supplied to the fireplace through at least the secondary air supply holes at the height of the combustion chamber of the combustible wood charge. In the further steps of the method 100, when the wood charge burns and consequently lowers, the air supply holes used to supply the preheated secondary air are replaced with air supply holes at a level corresponding to the respective upper combustion space of the wood charge burning in the furnace. That is, the secondary air supply holes change to holes arranged at a lower level in the secondary air cassette as the height of the wood charge decreases as the combustion process progresses. At least some of the steps of method 100 may also occur simultaneously as the combustion process proceeds. When trees are added to the burning wood charge and the height of the wood charge - increases, the air supply holes in the upper level of the secondary air cassette are re-introduced in the combustion air cassette to supply secondary air to the higher upper combustion chamber.
    Fig. 11a is a top perspective view of a combustion air cassette 110 for use in a furnace hearth according to an embodiment of the invention, and Fig. 11b is a top perspective view of a combustion air cassette 111 according to another embodiment of the invention. The secondary air cassettes for the side walls of the firebox of the combustion air cassette 111 of Fig. 11b have a bend. The side secondary air cassettes of the combustion air cartridge 112 of Fig. 11c are uncomplicated in structure, but exit the primary air cartridge obliquely outward, i.e., not perpendicularly upward, whereby the cross section of the combustion air cartridge becomes substantially v-shaped. Also in these stove combustion air cassettes 110, 111, 112, the amount of primary air supplied to the firebox from the supply openings on top of the primary air cassettes can be adjusted or completely closed by controls 113. Combustion air cassettes for heaters N, i.e. to be assembled from two or more parts in the form of a combustion air cassette into another. This may be necessary, for example, in heaters because the hatches of heaters or N other fireboxes can be quite small and can be difficult x 30 - to get a combustion air cartridge in a ready-to-use form in the firebox. = It is clear that the present invention is not limited only to the S embodiments presented above, but can be modified within the scope of the appended claims N. Also the embodiments of the combustion air cartridges shown in the different figures - can be combined. For example, one combustion air cartridge may comprise 1-3 different models.
    secondary air cassettes, different types and / or sizes of air supply holes in the secondary air cassettes and / or the primary air cassette, a restricted or unrestricted air intake or duct, one or more guides, , with or without openings, even if used in a grate fireplace, such as a fireplace or stove. etc. O OF O OF
    N <Q OF
    I a a O R LO O OF O OF
    权利要求:
    Claims (16)
    [1]
    1. Combustion air cassette for supplying combustion air to different altitudes | a combustion chamber of a fireplace, the combustion air cassette (10) comprising a hollow primary air cassette (11) and at least one hollow secondary air cassette (12) connected to the primary air cassette (11) by an air flow, and an air intake ( 35), by means of which combustion air is arranged to flow into the primary air cassette (11) and from the primary air cassette (11) to the lower part of the combustion chamber through primary air supply h! (15) on the upper surface of the primary air cassette (11) and to at least one secondary air cassette (12) for preheating, and from which secondary air cassette (12) the preheated secondary air is arranged to flow into the combustion chamber via at least such secondary air supply ha! (16) located at the height level of an upper combustion chamber on top of a wood insert burning on the primary air cassette (11), characterized in that the combustion air cassette (10) further comprises an air regulator (18) adapted to control the size on the primary air supply heels (15) so that the supply of primary air in the combustion chamber decreases, and to close the primary air supply heels (15) completely so that the supply of combustion air in the combustion chamber from the combustion air cassette consists only of air heat (10).
    [2]
    The combustion air cassette according to claim 1, wherein the secondary air cassette (12) is provided with secondary air supply h! (16) at at least two different height levels.
    N N
    [3]
    The combustion air cassette according to claim 1, wherein the secondary air cassette (12) is provided with secondary air supply h! (16) at several different 2 height levels. I 30 o
    [4]
    The combustion air cartridge according to claim 1, wherein the secondary air cartridge (12) is provided with secondary air supply cages! (16) at several different height levels S from the lower part of the secondary air cassette (12) to the upper part of the secondary air cassette (12).
    [5]
    The combustion air cartridge according to any one of claims 1 to 4, wherein the air intake (35) is arranged below the primary air cartridge (11).
    [6]
    The combustion air cartridge according to any one of claims 1-5, wherein the air intake (35) comprises at least one restrictor (36) for limiting the amount of air flowing into the primary air cartridge (11).
    [7]
    Combustion air cassette according to any one of claims 1-6, which comprises two or three secondary air cassettes (12) which are connected to the primary air cassette (11) by an air flow so that combustion air flows from the primary air cassette (11) into said two or three secondary air cassettes (12).
    [8]
    The combustion air cartridge according to any one of claims 1 to 7, wherein the combustion air cartridge (10) comprises an elevation (93) below the secondary air cartridge (12).
    [9]
    Combustion air cassette according to any one of claims 1-7, wherein the combustion air cassette (10) comprises an elevation (93) in the lower part of the combustion air cassette (10), which combustion air cassette (10) is arranged to - be placed on the bottom of the fireplace .
    [10]
    Fireplace, characterized in that the fireplace comprises a combustion air cassette (10) according to any one of claims 1-9.
    [11]
    A fireplace according to claim 10, in which the combustion air cassette (10) is arranged so that the secondary air cassette (12) is located on either the side N or the rear wall of the fireplace.
    S 2
    [12]
    A method of supplying combustion air for a wood insert burning in the combustion chamber of the fireplace to different height levels of the combustion chamber, the method comprising receiving combustion air in a combustion air cassette (10) via a combustion air cassette. lower air arrangement (35), in which combustion air cassette (10) the combustion air is divided into primary air for a primary air cassette (11) and secondary air for a secondary air cassette (12),
    supply of primary air in the combustion chamber via primary air supply h! (15) on the upper surface of the primary air cassette (12), and preheating secondary air in the secondary air cassette (12), supplying preheated secondary air to the fireplace via at least such secondary air supply vessels! (16) located at the height level of an upper combustion chamber on top of the wood insert burning on the primary air cassette (11), characterized in that the method further comprises controlling the size of the primary air supply heels (15) with an air regulator (18) in the combustion air cassette (10). ) so that the amount of primary air supplied to the combustion chamber decreases, or so that the combustion air supplied to the combustion chamber from the combustion air cassette (10) consists only of preheated secondary air.
    [13]
    The method of claim 12, wherein the method further comprises circulating secondary air through an air distributor (86) in the secondary air cassette (12) to preheat secondary air prior to the supply of preheated secondary air to the upper combustion chamber of the combustion chamber. .
    [14]
    A method according to claim 12 or 13, wherein the method further comprises - replacing the air supply heel (16) used for supplying preheated secondary air to the air supply hall (16) located at a height level corresponding to the respective upper combustion chamber of the wood insert which burns in the combustion chamber.
    [15]
    A method according to any one of claims 12 to 14, wherein the supply of only secondary air in the upper combustion chamber on the burning N insert is continued when the primary air supply heels (15) in the combustion air cassette S (10) are closed. © I 30
    [16]
    Modification kit for a combustion air cassette for a fireplace, characterized in that the modification kit for a combustion air cassette comprises a combustion air cassette (10) according to one of claims 1 to 9.
    S
    N
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    同族专利:
    公开号 | 公开日
    WO2021165578A1|2021-08-26|
    FI129332B|2021-12-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB548026A|1941-05-22|1942-09-22|Herbert Metcalfe|Improvements in or relating to means for introducing air into domestic fire places|
    CH240716A|1943-10-04|1946-01-15|Wartburg Wilhelm Von|Device to improve the heating effect of heating systems.|
    NL8303987A|1983-11-18|1985-06-17|Haaras B V|Coal and wood burning heating stove - has grate closable to shut-off primary air, secondary air passage, and passage opened by closing grate to admit further air|
    FI123547B|2010-05-06|2013-06-28|Pasi Sillanpaeae|Solid fuel burner and solid fuel combustion process|
    法律状态:
    2020-08-14| PC| Transfer of assignment of patent|Owner name: NPI-ENGINEERING OY |
    2021-12-15| FG| Patent granted|Ref document number: 129332 Country of ref document: FI Kind code of ref document: B |
    优先权:
    申请号 | 申请日 | 专利标题
    FI20205176A|FI129332B|2020-02-21|2020-02-21|A combustion air cassette, a fireplace with a combustion air cassette, a method for supplying combustion air, and a kit for retrofitting a combustion air cassette|FI20205176A| FI129332B|2020-02-21|2020-02-21|A combustion air cassette, a fireplace with a combustion air cassette, a method for supplying combustion air, and a kit for retrofitting a combustion air cassette|
    PCT/FI2021/050117| WO2021165578A1|2020-02-21|2021-02-18|A combustion air cassette, a fireplace with a combustion air cassette, a method for supplying combustion air, and a kit for retrofitting a combustion air cassette|
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