• 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:
    Implementation method suitable to be implemented in a gas cooking appliance and gas cooking appliance that implements said method. The household appliance comprises an enclosure (2), a control unit (6), a gas heating element comprising a gas burner (4) and a solenoid valve (5) comprising an open position where gas is allowed to pass through and a closed position where gas is not allowed, and at least one incandescent element (3). Said glow element (3) is adapted to ignite the burner (4) when the solenoid valve (5) is open. In a cooking step of the method of the invention, the control unit (6) activates or keeps active only the glow element (3) to heat and/or maintain the enclosure (2) close to a certain setpoint temperature (tc).
    公开号:ES2545928A1
    申请号:ES201430358
    申请日:2014-03-14
    公开日:2015-09-16
    发明作者:Félix Querejeta Andueza
    申请人:Coprecitec SL；
    IPC主号:
    专利说明:

    Method of implementing a gas cooking appliance and appliance5 gas cooking appliance that implements said method
    SECTOR OF THE TECHNIQUE
    The present invention relates to methods of implementing a gas cooking appliance, such as an oven, and gas cooking appliances that implement said method.
    15 PREVIOUS STATE OF THE TECHNIQUE
    Gas cooking appliances are known which comprise an enclosure, a control unit, a burner, an electrovalve comprising an open position where the passage of gas to the burner is allowed and a closed position where it is not allowed
    20 the passage of gas to the burner and at least one incandescent element adapted to be heated to reach the combustion temperature of the gas, said incandescent element being able to light said burner when the solenoid valve is open.
    ES2335442 T3 discloses a gas oven comprising an enclosure, a gas burner disposed in the lower part of the enclosure, a first solenoid valve that feeds all or nothing said burner, a second solenoid valve that regulates the passage of gas towards the burner with the intention of regulating the temperature of the enclosure, an incandescent element and an ionization electrode. The glow plug turns on the
    30 gas burner when both solenoid valves are open. The ionization electrode is suitable for detecting the presence of the flame in the burner, therefore it is an element that is used to ensure oven safety.
    EXHIBITION OF THE INVENTION
    The object of the invention is to provide a method of implementing a gas cooking appliance and a gas cooking appliance that implements said method, as described below.
    The method of implementation of the invention is suitable for being implemented in a gas cooking appliance comprising an enclosure, a control unit, a gas heating element comprising a gas burner and a solenoid valve that
    10 comprises an open position where the passage of gas to the burner is allowed and a closed position where the passage of gas to the burner is not allowed, and at least one incandescent element. Said incandescent element is adapted to be heated until the combustion temperature of the gas is reached, therefore when the solenoid valve is open the incandescent element ignites the burner.
    In a cooking stage of the method of the invention, the control unit activates or keeps only the glow plug active to heat and / or keep the enclosure close to a certain setpoint temperature.
    With the method of implementation of the invention it is possible to keep the temperature of the enclosure more homogeneous near the setpoint temperature. The power supplied by the burner is much greater than the power supplied by the incandescent element, therefore, for a certain setpoint temperature, not high, the temperature of the enclosure oscillates or fluctuates around said setpoint temperature quite
    25 less when said power is only supplied by the incandescent element. In this way, the temperature of the enclosure is much more stable and homogeneous, which is especially advantageous in those applications in which it is desired to obtain a temperature not elevated but stable and homogeneous within the enclosure. Therefore, with the method of the invention the optimum conditions can be met by
    30 example to ferment various products inside the home appliance, for example to bake bread, pizza or even yogurts.
    These and other advantages and features of the invention will become apparent in view of the figures and the detailed description of the invention.
    DESCRIPTION OF THE DRAWINGS
    5 Figure 1 shows a perspective view of an embodiment of the gas cooking appliance in which the method according to the invention can be implemented.
    Figure 1B shows a schematic representation of the home appliance of Figure 10A.
    Figure 2 shows a graph of the behavior of the temperature of the enclosure of the household appliance of Figure lA according to a second mode of operation, said mode of operation comprising the heating stage and the stage of
    15 maintenance
    Figure 3 shows an electrical scheme of the glow plug of Figure 1 B connected to a power source.
    20 Figure 4 shows a graph of the behavior of an incandescent element type NTC.
    Figure 5 shows a graph of the behavior of a PTC type incandescent element.
    DETAILED EXHIBITION OF THE INVENTION
    Figure 1 shows a perspective view of an appliance 1 in which
    30 can implement the method of the invention, and Figure 1 B shows a schematic representation of said home appliance 1. Home appliance 1 comprises an enclosure 2, a control unit 6, a gas heating element and at least one element of incandescence 3. Said gas heating element comprises a gas burner 4 and an electrovalve 5 comprising an open position where the passage of gas to the burner 4 is allowed and a closed position where the passage of gas to the burner 4. is not allowed. incandescent element 3 is adapted to be able to heat up to the combustion temperature of the gas, therefore when the solenoid valve 5 is open the incandescent element 3 ignites the burner 4. In the example of figure 18 of this first embodiment, the control unit 6 implements an implementation method comprising a cooking stage in which the control unit 6 activates or keeps active only between the incandescent element 3 to heat and / or keep the enclosure 2 close to a certain setpoint temperature Te.
    The method of implementation of the invention comprises in a first embodiment at least two modes of operation in which the first mode is carried out in a temperature range where the selected setpoint temperature Te is greater than or equal to a threshold temperature Tu and the The second mode is carried out in a range where the selected setpoint temperature Te is lower than the threshold temperature Tu. The cooking stage of the implementation method is carried out in said second mode of operation.
    The setpoint temperature Te is the temperature that the user of the household appliance 1 selects, through a user interface 9 that interacts with the control unit 6, to define the cooking mode, and the threshold temperature Tu is that temperature in that the burner, due to having excessive power, is not able to keep the temperature of the stable and homogeneous enclosure 2 within a range or temperature range that can range between + 2.5 ° C and -2.5 ° C over the setpoint temperature Te. In a non-limiting example of the invention the threshold temperature Tu corresponds approximately to 65 ° C, but this temperature may vary depending on the power of the burner 4 of the household appliance 1.
    Thus, with the method of implementation of the first embodiment of the invention it is possible to keep the temperature of the enclosure 2 close to the setpoint temperature Te more stable and homogeneous when the setpoint temperature Te is lower than the threshold temperature Tu, it is within a range of temperatures tlT which can range, at most, between + 2.5 ° C and -2.5 ° C with respect to the setpoint temperature Te_ In a non-limiting example of the invention said temperature range. .T ranges between + O, 5 ° C and -O, 5 ° C. The power supplied by the burner 4, which can be, for example, the

    order of 7KW, is much greater than the power supplied by the glow plug 3, which can be for example of the order of 160 W. Therefore, using the burner 4 as the main heating element it is not able to maintain the temperature of the enclosure 2 within the desired temperature range .ó.T due to the inertia of the burner 4 itself.
    The second mode of operation of the method according to the first embodiment of the invention can be advantageous for cooking or fermentation of various products within the enclosure 2 such as bread, pizza or even yogurts. This last operation, carried out for example between 20 ° C and 60 ° C, is delicate and special control is required on the temperature of the enclosure 2, that is to say the temperature of the enclosure 2 must be stable and homogeneous to obtain a product Quality and no bad smells.
    In said second mode of operation the only heating element is the incandescent element 3, that is to say the control unit 6 activates or keeps active only the incandescent element 3 to heat and / or keep the enclosure 2 close to the setpoint temperature Te , passing the gas burner 4 to an inactive state where the solenoid valve 5 is kept closed to prevent the passage of gas. The glow plug 3 has sufficient power to maintain the temperature of the enclosure under said conditions.
    Optionally, in a variant of this embodiment, the second mode of operation may comprise a heating stage Ee wherein the burner 4 and the glow plug 3 are activated by the control unit 6 to heat the enclosure 2 until the temperature of setpoint Te in a first phase, as shown in figure 2, and a maintenance stage Em where the glow plug 3 is the only heating element to maintain the temperature of the enclosure 2 close to the setpoint temperature Te in a second phase, passing the gas burner 4 to the inactive state. That is, in this maintenance stage Em the control unit 6 keeps only the glow plug 3 activated to maintain the temperature of the enclosure 2 within the temperature range .ó.T. This variant is especially advantageous because the power of the burner 4 is used to quickly heat the enclosure 2 (to the desired temperature) and then said temperature is maintained only with the glow plug 3, which contributes to improving energy efficiency and reducing the energy cost of the home appliance 1 while ensuring stability and homogeneity of the temperature of the enclosure 2. If it starts from the situation that the home appliance 1 is already hot, the heating stage Ee could be dispensed with.
    Figure 2 shows a graph of an example of the temperature behavior of the enclosure 2 of the household appliance 1 that is operating according to the variant of said second mode of operation, that is, according to the second mode of operation comprising the heating stage Ee And the maintenance stage
    10 Em. This graph reflects the temperature "T" on the vertical axis and the time "t" on the horizontal axis.
    In any of the embodiments of the invention, when only the glow plug 3 is activated, it corresponds to an electric heating element 15 that heats and / or keeps the enclosure 2 hot by convection.
    In the first mode of operation of the method according to the first embodiment of the invention, the burner 4, being the main heating element, is capable of maintaining the temperature of the enclosure 2 within the desired temperature range LlT when the
    20 setpoint temperature Te is greater than or equal to the threshold temperature Tu. In this first mode of operation the operating temperature range could be set, for example, between 65 ° C and 250 ° C. Within this operating temperature range, the inertia of the burner 4 does not prevent the setpoint temperature Tc from being reached and maintained within said temperature range Ll1.
    25 As in the variant of the second mode of operation, this first mode of operation also comprises a heating stage in which the burner 4 and the glow plug 3 are activated to heat the chamber 2 until the set temperature Te is reached ( incandescent element 3 contributes in a minor
    30), and a maintenance stage where both the burner 4 and the glow plug 3 are kept active to keep the temperature of the enclosure 2 close to the setpoint temperature Tc (the glow plug 3 contributes to a lesser extent) .

    To control the temperature of the enclosure 2 according to any of the embodiments of the invention, the home appliance 1 comprises a temperature sensor 8, preferably arranged in the upper part of the enclosure 2, associated with the control unit 6 so that said control unit 6 correctly manage both the burner 4 and the glow plug 3.
    The glow plug 3 is constantly connected to a power supply 7, as shown in Figure 3, during operation of the home appliance and is suitable for lighting the burner 4 when the solenoid valve 5 is open. Optionally, the glow plug 3 can also be fed directly to a power outlet or indirectly through the control unit 6. Therefore, a situation of unwanted on or off of the burner 4 can only occur when the element of incandescence 3 work defectively.
    In this sense, the control unit 6 reads and registers the current "1" that passes through the glow plug 3 and comprises a monitoring unit that acts on the solenoid valve 5 for any anomaly detected in the glow plug 3, that is to say , acts on the solenoid valve 5 as a function of said current '' 1 "read.
    Thus, in the first mode of operation of the household appliance 1 according to any of the described embodiments, the control unit 6, through said monitoring unit, keeps the solenoid valve 5 open if the current "1" read is stable and is greater than a preset minimum current Imin, and closed otherwise.
    What is described in this last paragraph also applies to the heating stage Ec of the second mode of operation of the household appliance 1 according to any of the described embodiments. That is, whenever the normal operation of the household appliance 1, the solenoid valve 5 or the burner 4 is enabled to be used, the control unit 6 will monitor the correct operation of the household appliance 1 by acting on any anomaly through the monitoring unit. detected in the glow plug 3. Thus, if any anomaly is detected, the control unit 6 will close the solenoid valve 5 to avoid leaks of unburned gas and otherwise the control unit 6 will keep the solenoid valve 5 open.
    The current 'T is considered stable when the variation between two consecutive values is less than 5%. The minimum current Imin is defined as the minimum current required to pass through the glow plug 3 so that it is capable of igniting the
    5 gas In the examples in graphs 4 and 5 the stable zone corresponds to the zone of thestraight graph and close to the Imin line.
    The gas burner 4 and the glow plug 3 of the home appliance 1 according to any of the described embodiments are arranged in the lower part of the enclosure 2. 10 In a non-limiting example, the glow plug 3 is arranged at one end of the burner 4, preferably near the first flame of the burner flame path 4. Optionally, the home appliance 1 in which the method of the invention is implemented according to any of the described embodiments, may comprise a second burner 4 ', shown in the Figure 1, at the top of enclosure 2 by way
    15 grill Instead of said second burner 4 ', an electric resistor could be arranged as a grill element so as to heat the enclosure 2 by radiation.
    The glow plug 3 of the home appliance 1 in which the method of the invention is implemented according to any of the described embodiments may comprise an NTC or PTC type behavior. In the NTC behavior the resistance of the glow element 3 decreases as its temperature increases, thus increasing the current '' 1 "that passes through said glow element 3. In the PTC behavior, on the contrary, the resistance of the element of incandescence 3 increases as its temperature increases, thus decreasing the current '' 1 "that passes
    25 through the incandescent element 3.
    权利要求:
    Claims (8)
    [1]
    one. Method of implementation of a gas cooking appliance (1),
    said household appliance (1) comprising an enclosure (2), a control unit
    5 (6), a gas heating element, said gas heating element comprising a
    gas burner (4) and an electrovalve (5) comprising an open position where
    the passage of gas to the burner is allowed (4) and a closed position where it is not allowed
    the passage of gas to the burner (4), and at least one incandescent element (3) adapted
    to be able to warm up to the combustion temperature of the gas, being
    10 said incandescent element (3) suitable for lighting said burner (4) when the
    solenoid valve (5) is open, characterized in that in a cooking stage said
    control unit (6) activates or maintains only the active element
    incandescent (3) to heat and / or keep the enclosure (2) close to a certain
    setpoint temperature (Tc).
    fifteen
    [2]
    2. Method according to claim 1, comprising at least two modes of
    operation where the first mode is carried out in a temperature range
    where the selected setpoint temperature (Tc) is greater than or equal to the temperature
    threshold (Tu) and the second mode is carried out in a strip where the temperature of
    twenty selected setpoint (Tc) is lower than the threshold temperature (Tu), being implemented
    said cooking stage in said second mode of operation.
    [3]
    3. Method according to claim 2, wherein said second mode of operation
    it comprises a heating stage where the burner (4) and the element of
    25 incandescent (3) are activated to heat the enclosure (2) until reaching the
    setpoint temperature (Te) and a maintenance stage where only
    keeps the glow plug activated (3) to maintain the temperature of the
    enclosure (2) close to the setpoint temperature (Tc).
    30 Four.Method according to claims 2 or 3, wherein said first mode of operation
    it comprises a heating stage where the burner (4) and the element of
    incandescent (3) are activated to heat the enclosure (2) until reaching the
    setpoint temperature (Tc) and a maintenance stage where both the
    burner (4) as the incandescent element (3) are kept active for
    35 keep the room temperature (2) close to the setpoint temperature (Tc).
    [5]
    5. Method according to any of the preceding claims, wherein the glow plug (3) is constantly powered during operation of the home appliance (1).
    [6]
    6. Method according to claim 5, wherein the control unit (6) reads and registers the current (1) that passes through the glow plug (3) to close the solenoid valve
    (5) in case of anomaly.
    Method according to claim 6, wherein the control unit (6) comprises a monitoring unit that, when the burner (4) is activated, keeps the solenoid valve (5) open if said read current (1) is stable and is greater than a preset minimum current (Imin), and closed otherwise.
    Method according to any of the preceding claims, wherein when only the incandescent element (3) is activated, this corresponds to an electric heating element that heats and / or keeps the enclosure (2) hot by convection.
    Method according to any one of the preceding claims, wherein the threshold temperature (Tu) is 65 'C.
    [10]
    10. Method according to any of the preceding claims, wherein the incandescent element (3) may comprise an NTC or PTC type behavior.
    [11 ]
    eleven . Method according to any of the preceding claims, wherein the gas burner (4) and the glow plug (3) are arranged in the lower part of the enclosure (2).
    A method according to claim 11, wherein the incandescent element (3) is disposed at one end of the burner (4), preferably near the first flame of the burner flame path (4).
    [13]
    13. Gas cooking appliance, such as an oven, comprising an enclosure
    35 (2), a control unit (6), a gas heating element, said gas heating element comprising a gas burner (4) and an electrovalve (5) comprising an open position where the passage of gas is allowed to the burner (4) and a
    closed position where the passage of gas to the burner (4) is not allowed, and at least one incandescent element (3) adapted to be heated to reach the combustion temperature of the gas, said incandescent element (3) being able to ignite said burner (4) when the solenoid valve (5) is open,
    5 characterized in that said control unit (6) implements the method of implementation according to any of claims 1 to 12.
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JPS59100316A|1982-11-30|1984-06-09|Matsushita Electric Ind Co Ltd|Hot air heating apparatus|
    FR2758385A1|1997-01-10|1998-07-17|Eurofours Sa|Heating ovens e.g. rotary bakery ovens with both gas and electricity|
    US20040200825A1|2003-04-10|2004-10-14|Maytag Corporation|Combination heating system for a cooking appliance|
    EP1847780A1|2006-04-18|2007-10-24|Brandt Industries|Domestic cooking oven|
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    US4675506A|1986-02-24|1987-06-23|Max Nusbaum|Non-thermostatic constant temperature device for food heat maintenance|
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    US7750271B2|2005-10-05|2010-07-06|General Electric Company|Systems and methods for controlling oven cooking|
    CN201892264U|2010-12-15|2011-07-06|普鲁卡姆电器（上海）有限公司|Gas-electricity duplex heater|IT201700035167A1|2017-03-30|2018-09-30|Ing Polin & C S P A|Oven for cooking food and heating an oven for cooking food|
    US10659561B2|2017-06-09|2020-05-19|Microsoft Technology Licensing, Llc|Service state preservation across nodes|
    KR20200142519A|2018-03-27|2020-12-22|에스씨피 홀딩스 언 어숨드 비지니스 네임 오브 나이트라이드 이그나이터스 엘엘씨|High temperature surface igniter for cooktop|
    法律状态:
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    优先权:
    申请号 | 申请日 | 专利标题
    ES201430358A|ES2545928B1|2014-03-14|2014-03-14|Method of implementing a gas cooking appliance and gas cooking appliance implementing said method|ES201430358A| ES2545928B1|2014-03-14|2014-03-14|Method of implementing a gas cooking appliance and gas cooking appliance implementing said method|
    US14/335,938| US20150260411A1|2014-03-14|2014-07-20|Gas cooking appliance and gas cooking method|
    MX2014008954A| MX2014008954A|2014-03-14|2014-07-24|Gas cooking appliance and gas cooking method.|
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