• 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:
    A method and apparatus is described for controlling crops (10) by means of a heated gas (20) that is generated in a burner (30) and via an outflow opening (42) from a discharge channel (40) to the crop to be controlled. washed (10). A fan (50) is arranged between the burner (30) and the discharge channel (40) so that the fan (50), during operation, draws in the heated gas (20) from the burner (30) and discharges it to the discharge channel (40). ) and thereby exhibits a flame-retardant effect.
    公开号:BE1025784B1
    申请号:E2018/5704
    申请日:2018-10-15
    公开日:2019-07-15
    发明作者:Marc Guy Polleunis
    申请人:Agrofrost Nv；
    IPC主号:
    专利说明:

    TECHNICAL DOMAIN
    The invention relates to a method and an apparatus for controlling crops by means of a heated gas. More specifically, controlling for example weeds by means of a heated gas that is generated in a burner.
    STATE OF THE ART
    A method and apparatus for controlling weeds by means of a heated gas is known, for example, from US 3112742. The device contains a burner to generate the heated gas. The burner contains an outflow opening from which the heated gas is fed to the weed to be controlled. A known disadvantage of such a device is the risk with regard to fire safety. As can be seen, the burner is located at the outflow opening, whereby, in addition to the heated gas, an open flame also emerges through the outflow opening to control the weeds. It goes without saying that such a flame can give rise to a fire hazard, in particular in an environment where, for example, dried vegetable material is present. As can be seen, with such a burner, air to be heated by means of a fan and a guide tube is supplied to the burner which is positioned near the outflow opening. The air flow generated by the fan is thereby hindered by the presence of, for example, the elements of the burner elements in the flow path from the fan to the outflow opening.
    An alternative method and apparatus for the thermal treatment of weeds is also known from US2010 / 0024291 in which air is supplied via a fan to a burner, after which the heated air via a
    BE2018 / 5704
    -2 outflow opening flows to the weeds. Here, too, there is a direct path from the burner to the outflow opening and there is therefore a risk that the flame reaches the outflow opening and constitutes a risk of fire hazard. To reduce the treatment time, use is made of preheating by blowing the air through the fan past the burner chamber before it reaches the burner chamber. This embodiment relates to a device which can be mounted on or on a vehicle, such as for instance a tractor.
    There is therefore a need for an improved crop control apparatus and method whereby the flow rate of the heated gas can be increased in order to make the treatment faster and more efficient and the risk of fire risk is reduced.
    RESUME
    For this purpose, according to a first aspect of the invention, there is provided a method for controlling crops by means of a heated gas which is generated in a burner and is fed via an outflow opening from a discharge channel to the crops to be controlled,
    THAT IS A CHARACTER THAT A FAN IS FITTED BETWEEN THE BURNER AND THE DRAIN CHANNEL so that the fan, during operation, sucks in the heated gas from the burner and discharges it to the drain and thereby has a flame-extinguishing effect.
    Because the fan is fitted between the discharge channel and the burner and has a flame-extinguishing effect during operation, the risk of fire hazard is considerably reduced. This makes it possible to increase the gas flow rate by means of the fans to increase the heating through the burner without this leading to an increased risk that flames can reach the outflow opening. This allows a more efficient treatment
    BE2018 / 5704
    -3 of the crop can be realized. This means, for example, that the time period during which the crop must be exposed to the heated gas can be reduced. In the case of a device fitted to a vehicle, this means, for example, that the driving speed can be increased and that a larger surface area can be treated in a given period of time. It is clear that the fan forms a mechanical obstacle to the flames of the burner during operation. Furthermore, during operation, the fan also causes a certain pressure increase in the heated gas, whereby the flame-extinguishing effect is enhanced. Furthermore, this pressure increase also ensures that the heated gas is blown into the plants with an increased pressure and flow rate. This provides an accelerated effect of the heat of the heated gas on the cells of the crop, causing the cells of the crop to dry out or their cell walls to be damaged. This allows the treatment time of the crop to be reduced without increasing the risk of fire. It is clear that such a treatment according to the method according to the invention can realize this increased efficiency without using the burning of the plants by means of an open flame at the outlet opening of the outlet channel. In other words, the crop is treated by the heated gas without directly exposing the crop to flames and / or radiant heat caused by the combustion process in the burner. The heat generated by the burner is therefore only supplied to the crop to be treated via flow or convection via the heated gas. Due to the heated gas blown out under pressure, it is also possible that the efficiency of the treatment of the crop can be increased without raising the temperature of the heated gas so high that there would also be an increased risk of fire, or safety measures must be taken when using the method to avoid the risk of, for example, burns to the user, such as cooling jackets or cooling elements. The components of the apparatus, in particular the output channel, but also, for example, the burner, are thus also exposed to more limited temperatures, which
    BE2018 / 5704
    -4 provides an advantage since simpler and cheaper materials and parts can be used.
    Furthermore, since the fan is arranged between the burner and the discharge channel, this means that the heated gas blown into the discharge channel by the fan is no longer impeded by elements of the burner, making it more efficient and with a higher flow to the outflow opening can flow. It is clear that this also makes a more efficient treatment of the crop possible. Furthermore, this more efficient configuration also ensures that the energy consumption required for the fan and burner can be optimized and that the amount of fuel per area of crop to be treated can be reduced.
    It is furthermore clear that the flame-extinguishing action means that the flames that arise in the burner due to the combustion process of a suitable fuel such as, for example, gas cannot extend beyond the fan. It is clear that this does not mean that the flames in the fan itself are extinguished. In that sense, the flame-extinguishing effect of the fan must therefore be seen as an effect of the fan whereby the passage of the flames of the burner through the fan is prevented or inhibited, and the fan thus as it were a flame-retarding or flame-retarding effect shows.
    According to an embodiment, a method is provided wherein:
    - an inlet opening of the discharge channel is connected to an outlet opening of the fan and the outlet channel forms a closed circuit for the heated gas from the inlet opening to the outflow opening where the crops to be controlled are exposed to the heated gas; and
    - an outlet opening of the burner is connected to an inlet opening of the fan for sucking in the gas heated by the burner.
    BE2018 / 5704
    In this way the heated gas is sucked in from the burner at the inlet of the fan and subsequently discharged at the outlet of the fan via the discharge channel to the crop to be treated. Since the fan has a flame-extinguishing effect, the heated gas can thus be discharged to the crop in a more fire-safe manner.
    According to a further embodiment, a method is provided in which no elements are provided in or after the discharge channel that at least partially disrupt the flow of heated gas.
    In this way, the heated gas can be generated in an efficient manner while optimally maintaining the flow rate generated by the fan. In this way the energy consumption and / or fuel consumption per treated surface of the crop can be optimized.
    According to a further embodiment, a method according to any one of the preceding claims is provided, wherein no burner is arranged in or downstream of the discharge channel; and / or no burner is installed downstream of the fan.
    It is clear that fire safety is optimized in this way since the risk that flames from a burner can reach the crop to be treated is reduced. Furthermore, the absence of a burner downstream of the fan ensures that an optimum flow of the heated gas to the crop to be treated is achieved, whereby the treatment can be carried out with a more efficient use of energy and / or fuel.
    According to a further embodiment, a method is provided in which a pressure-increasing element is provided at the outlet opening of the fan.
    BE2018 / 5704
    In this way the flame-extinguishing effect of the fan can be increased in a simple manner. In this way the fan not only forms a mechanical obstacle to the flames, but also the pressure increase provides an additional barrier for the flames from the burner.
    According to a further embodiment, a method is provided wherein
    - the pressure of the heated gas is increased by the fan by at least 0.05 bar, preferably in the range of 0.1 to 2 bar;
    - the flow rate of the heated gas through the fan is brought to a value in the range of 0.3 m 3 / s to 7 m 3 / s;
    - the burner heats the heated gas so that it has a temperature in the range of the outlet opening of the discharge channel in the range of 100 ° C to 300 ° C, preferably a temperature in the range of 150 ° C to 175 ° C.
    Such a combination of pressure, flow rate and temperature ensures optimum treatment with optimum energy consumption and / or fuel consumption. Such a pressure increase also ensures an optimum flame-extinguishing effect. In other words, the fan is configured to increase the pressure of the heated gas so that a flame-retardant effect is obtained. It has been found that with a sufficiently high flow rate of the heated gas an efficient treatment is possible and that further raising of the temperature above the above-mentioned values contributes only little or not to an increase in the efficiency of the treatment. As a result, an efficient and fire-safe treatment can be realized with an optimum energy consumption since the temperature does not have to be raised unnecessarily in the burner and since the outflow of gas heated by the burner can occur as optimally as possible since after the fan there are no interfering components such as, for example, a burner be present in the flow path of the heated gas via the discharge channel, whereby the desired flow rate can also be realized in an efficient manner.
    BE2018 / 5704
    According to a further embodiment, a method is provided in which the crop during a treatment with the heated gas from the outflow opening of the outlet channel, for a period of time of a maximum of 5 seconds, preferably a maximum of 1 second, preferably in the range of 0, 5s to 2s. According to yet another embodiment, wherein the device is mounted on a vehicle, the treatment is preferably carried out at a vehicle speed of at least 3 km / h, preferably at least 6 km / h, for example at least 10 km / h.
    According to a further embodiment, a repeat of the treatment of the crop with the heated gas is provided, preferably the treatment of the crop is repeated two or more times, with a frequency of two or more per week, for example a repeated treatment in which the treatment is repeated three times over a period of one week. In this way not only the above-ground crop parts are damaged, but the repeated treatment also causes the photosynthesis to be interrupted, causing the root to die off and the treatment thus yielding a more permanent result.
    According to a further embodiment, a method is provided wherein
    - the burner is selected from one of the following types:
    - a gas burner;
    - a liquid fuel burner;
    - a solid fuel burner;
    - the fan is selected from one of the following types:
    - a centrifugal fan;
    - an axial fan; and / or
    - the heated gas contains ambient air supplied through an inlet opening of the burner and heated up by the burner.
    BE2018 / 5704
    In this way the method can be realized in a robust manner with simple means.
    According to a second aspect of the invention there is provided an apparatus for controlling crops by means of a heated gas, comprising:
    - a burner configured to generate the heated gas; and
    - a discharge channel with an outlet opening configured to feed the heated gas to the crops to be controlled,
    THAT CHARACTERIZED THAT the device further contains:
    - a fan arranged between the burner and the discharge channel configured so that the fan, during operation, draws in the heated gas from the burner and discharges it to the discharge channel and thereby has a flame-extinguishing effect.
    In this way, crop control can be achieved in an efficient and fire-safe manner. The fan forms a mechanical barrier to the flames of the burner during operation and furthermore the burner is preferably configured to increase the pressure of the heated gas so that the fan exhibits an increased flame-extinguishing action.
    According to an embodiment, an apparatus is provided, wherein:
    - the burner has an outlet for the gas heated by the burner;
    - the fan comprises an inlet opening and an outlet opening; and
    - the discharge channel comprises an inlet opening and an outflow opening; and where:
    - the inlet opening of the discharge channel is connected to the outlet opening of the fan and the outlet channel forms a closed circuit for the heated gas from the inlet opening to the outlet opening where the crops to be controlled are exposed to the heated gas; and
    - the outlet opening of the burner is connected to the inlet opening of the fan for sucking in the gas heated by the burner.
    BE2018 / 5704
    In this way the heated gas is sucked in from the burner at the inlet of the fan and then discharged at the outlet of the fan via the discharge channel to the crop to be treated without reducing the risk of flames from the burner reaching the outlet opening by the flame-extinguishing action of the fan that forms a mechanical obstruction to the flames during operation.
    According to a further embodiment, an apparatus is provided, wherein the apparatus does not contain elements which are arranged in or after the discharge channel and which at least partially disrupt the flow of heated gas.
    In this way, the desired flow rate of the heated gas at the outlet opening of the discharge channel is achieved in an efficient manner.
    According to a further embodiment, an apparatus is provided, wherein the apparatus does not contain a burner which is arranged in or downstream of the discharge channel; and / or the appliance does not contain a burner that is installed downstream of the fan.
    This prevents flames from reaching the outflow opening of the discharge channel without the mechanical obstruction of the fan, which increases fire safety.
    According to a further embodiment, an apparatus is provided, the apparatus comprising a pressure-increasing element arranged at the outlet opening of the fan.
    The flame-extinguishing effect of the fan is hereby increased in a simple manner.
    BE2018 / 5704
    According to a following embodiment, an apparatus is provided, wherein:
    the fan is configured to increase the pressure of the heated gas by at least 0.05 bar, preferably in the range of 0.1 to 2 bar;
    - the fan is configured to bring the flow rate of the heated gas to a value in the range of 0.3 m 3 / s to 7 m 3 / s;
    - the burner is configured to heat the heated gas in such a way that it has a temperature in the range of the outlet opening of the discharge channel in the range of 100 ° C to 300 ° C, preferably a temperature in the range of 150 ° C up to and including 175 ° C.
    Such a selection of the pressure increase, flow rate and / or temperature ensures a fire-safe treatment with optimum efficiency, whereby the treatment time can be reduced and / or the energy consumption and / or fuel consumption can be optimized.
    According to a following embodiment, an apparatus is provided, wherein:
    - the burner is selected from one of the following types:
    - a gas burner;
    - a liquid fuel burner;
    - a solid fuel burner;
    - the fan is selected from one of the following types:
    - a centrifugal fan;
    - an axial fan; and / or
    - the burner contains an inlet opening for ambient air, and the heated gas contains ambient air supplied through an inlet opening of the burner and heated up by the burner.
    The device can thus be realized in a simple manner.
    BE2018 / 5704
    According to a third aspect of the invention, there is provided a method for manufacturing an apparatus according to the first aspect of the invention, comprising the following steps:
    providing the burner for generating the heated gas;
    providing a blower assembly containing the fan and the downstream channel coupled to the fan;
    coupling the blower assembly to the burner, so that, during operation, the blower assembly fan draws in the heated gas from the burner and discharges it to the discharge channel.
    In this way the apparatus according to the invention can be manufactured in a simple manner by using an existing blower assembly by coupling a confused gas outflow opening of a burner to the inlet opening of a blower of such a blower assembly.
    FIGURES
    By way of example, some embodiments will be described with reference to the accompanying Figures, wherein:
    Figure 1 schematically represents an embodiment of the method and the apparatus for controlling crops by means of a heated gas;
    - Figures 2A-C schematically show a more detailed view of a front view, side view and top view of a further embodiment of such an apparatus, respectively; and
    Figure 3 schematically represents an embodiment of a method for manufacturing such an apparatus.
    FIGURE DESCRIPTION
    Figure 1 shows schematically an embodiment of the method and an apparatus 1 for controlling crops 10 by means of a heated gas 20. Such crops may, for example, contain weeds or other undesirable
    BE2018 / 5704
    - contain 12 crops or vegetable material which one wishes to eliminate by means of exposure to the heat of the heated gas 20. The apparatus 1 comprises a burner 30, for example a gas burner or any other suitable burner which burns a suitable fuel, to generate heat. to generate. Thus, according to the illustrated embodiment, the burner 30 is configured to generate a heated gas 20. For this purpose, for example, ambient air 22 is supplied via an inlet opening 34 of the burner 30, wherein the burner 30 heats this ambient air via a suitable combustion element such as, for example, a gas combustion element where supplied gas is burned. Subsequently, the gas 20 heated by the burner 30 is discharged via the outlet opening 32. It is clear that according to such an embodiment the heated gas 20 thus contains the ambient air heated by the burner 30. It is furthermore clear that the heated gas 20 can also optionally contain other components such as, for example, combustion gases generated by the burner or other suitable additives for controlling crops.
    As further visible in Figure 1, the device 1 further comprises a fan 50. Such a fan 50 or blower, as is known to those skilled in the art, is configured to effect a flow in a gas. As can be seen, the fan 50 comprises an inlet opening 54 and an outlet opening 52. The outlet opening 32 of the burner 30 is thereby connected to the inlet opening 54 of the fan 50 for sucking in the gas 20 heated by the burner 30. The fan 50 causes, in operation, i.e. when driven by a suitable drive 56, as further shown in more detail in Figures 2A-C, a flow in the gas 20 heated by the burner, in a downstream direction from the inlet opening 54 to the outlet opening 52 of the fan 50. It is clear that this flow of the heated gas 20 from the burner 30 via the outlet opening of the burner 30 also causes suction of new ambient air via the inlet opening 34 of the burner 30.
    BE2018 / 5704
    According to the embodiment of Figure 1, the apparatus furthermore also comprises a discharge channel 40. As can be seen, the discharge channel 40 comprises an inlet opening 44 and an outflow opening 42. The inlet opening 44 of the discharge channel 40 is connected to the outlet opening 52 of the fan 50. discharge channel 40 is designed, for example, as a tubular structure, a gas-conducting channel, or another suitable embodiment of a closed circuit for the heated gas 20 from the inlet opening 44 to the outlet opening 42. At the outlet opening 42, the gas flows from the outlet channel to outside where the crops 10 to be controlled are exposed to the heated gas 20. Although the discharge channel 40 of the illustrated embodiment has a simple structure with a single inlet opening 44 and a single outlet opening 42, it is clear that alternative embodiments are possible, wherein the discharge channel 40 a closed circuit can form and wherein heated air is guided from one or more inlet openings to one or more outflow openings 42 for treating crops 10. In general, the outlet channel 40 thus comprises at least one outlet opening 42 configured to feed the heated gas 20 to the crops 10 to be controlled. .
    Thus, it is clear that, according to the flow path of the heated gas 20, the burner 30 is upstream of the fan 50 and that the drain channel 40 is downstream of the fan. In other words, the fan 50 is arranged between the burner 30 and the discharge channel 40. During operation, i.e. when the fan 50 is driven by a suitable drive 56, the fan will therefore suck in heated gas 20 from the burner 30 and discharge it to the discharge channel 40. The fan 50 thereby has a flame-extinguishing effect. This means that the fan 50 forms a mechanical obstacle to the flames that arise in the burner as a result of the combustion process of the fuel, such as, for example, gas, for heating the heated gas to a suitable temperature. In this way it is prevented that the flames prevent the drain channel 40 and in particular the outflow opening 42 of the drain channel.
    BE2018 / 5704
    Can reach 1440 and the crops to be treated so that an increased fire safety of the device 1 is achieved in this way.
    It is also clear that, according to the embodiment shown, the device 1 preferably does not contain elements which are arranged in or after the discharge channel 40 and which at least partially disturb the stream of heated gas 20. In particular, according to the embodiment shown, an apparatus 1 is realized in which no burner is present in the discharge channel 40 or is arranged downstream of the discharge channel 40. Furthermore, it is also clear that according to this embodiment the apparatus 1 does not contain a burner 30 which is arranged downstream of the fan 50. All this makes it possible to achieve the desired flow rate of the heated gas 20 at the outlet opening 42 of the discharge channel 40 in an efficient manner. Furthermore, it is thus also prevented that flames from the combustion process in the burner 30 can reach the outflow opening 42 of the discharge channel 40. The mechanical obstacle of the fan 50 causes a flame-extinguishing effect which thus increases fire safety.
    As shown in Figure 1, the apparatus also comprises a conical reduction 46 at the outlet opening 52 of the fan 50. According to this embodiment, this conical reduction 46 is formed as a reduction of the cross-section of the discharge channel 40 at the outlet opening 52 wherein, for example, the diameter is reduced by 50%. However, it is clear that alternative embodiments are possible in which a reduction in the diameter of the discharge channel 40 or the flow channel of the fan 50 at the height of the outlet opening 52 exhibits a suitable narrowing, for example in the range of 5% to 75%. Such a conical reduction 46 causes a certain pressure increase in the heated gas 20 at the outlet opening 52 of the fan 50 during the operation of the fan 50. As stated above, the flame-extinguishing action of the fan 50 hereby becomes a preferred manner
    BE2018 / 5704
    - 15 raised. It is clear that many alternative embodiments are possible, as long as the device 1 preferably comprises a pressure-increasing element 46 which is arranged at the outlet opening 52 of the fan 50.
    Figures 2A-C schematically show more in detail, respectively, a front view, side view and top view of a further embodiment similar to the embodiment described above. Similar elements are designated with similar references and exhibit a similar structure and operation as described above with respect to Figure 1. The illustrated embodiment of the apparatus 1 of Figures 2A-C comprises a gas burner 30, a downstream centrifugal fan 50 and then a downstream discharge duct 40 coupled thereto, which is only shown in Figures 2B and 2C and omitted for the sake of clarity in Figures 2A. As can be seen, the fan draws in heated gas 20 from the burner via a central inlet port 54 and a vane element 58 driven by a combustion engine 56 provides during operation an appropriate flow in the heated gas 20 to the outlet port 52 of the fan 50 where it is fed further downstream via the discharge channel 40 to the crop to be treated. As already mentioned above, such an apparatus 1 can be designed as a portable apparatus 1 or an apparatus 1 which is mounted on a vehicle such as for instance a tractor to be moved with the outflow opening 42 along the crops 10 to be treated.
    It is clear that alternative embodiments are possible, for example, instead of a centrifugal fan, use can be made of another suitable type of fan, such as, for example, an axial fan, etc. According to further alternative embodiments, use can be made of, for example, instead of a gas burner other types of burners using suitable liquid or solid fuel. The drive 56 of the fan 50 shown comprises, for example, a suitable combustion engine. A combustion engine, for example, is particularly advantageous
    BE2018 / 5704
    - which uses the same fuel as the burner, such as, for example, a combustion engine that uses gas in combination with a gas burner since the same source of fuel can then be used. However, it is clear that alternative embodiments are possible, wherein the fan 50 is provided with any other suitable drive, such as for example an electric motor, etc.
    The fan 50 preferably increases the pressure of the heated gas 20 by 0.1 to 1.5 bar. However, it is clear that alternative embodiments are possible in which, preferably, the pressure becomes at least 0.05 bar, preferably in the range of 0.1 to 2 bar. In this way an optimum flame-extinguishing effect is obtained from the fan as well as an efficient energy consumption of the fan. In order to efficiently reduce the treatment time of the crops, the fan 50 is preferably configured to keep the flow rate of the heated gas 20 at at least 5 m 3 / s. It is clear that alternative embodiments are possible, wherein efficient treatment is already possible, for example, at a flow rate in the range of 0.3 m 3 / s to 7 m 3 / s, for example at least 3 m 3 / s. Although a higher temperature of the heated gas 20 leads to a more efficient treatment, it has been found that a temperature in the range of 150 ° C to 175 ° C leads to optimum results and that a higher temperature yields only a limited increase in the treatment time, which is insufficient compared to the increased fire safety risk as well as the increased fuel consumption of the burner 30. Moreover, such a temperature is particularly suitable for allowing the heated gas to flow through the fan 50 without a risk of inadmissible temperatures for certain elements, such as for example the bearings of the fan 50. It is clear that alternative embodiments are possible, whereby efficient treatment of the crops 10 remains possible when the burner 30 is configured to heat the heated gas 20 such that it is located at the outlet opening 42 of the outlet channel 40 has a temperature of at least 50 ° C. A temperature of at least 80 ° C is, of course, preferred and remains there
    BE2018 / 5704
    - a good relationship exists between the treatment time of the crop and the efficiency of the device at a temperature in the range of 100 ° C to 300 ° C It is therefore clear that it is particularly advantageous to use a combination of the above pressure increase, flow rate and / or temperature for a fire-safe treatment with optimum efficiency, whereby the treatment time can be reduced and / or the energy consumption and / or fuel consumption can be reduced. be optimized.
    Next, in Figure 3, a particularly advantageous embodiment for manufacturing an apparatus 1 becomes similar as described above with respect to Figures 1 and 2A-C. Similar elements are indicated with similar references and contain a similar structure and function as described above. As can be seen, according to this method a burner 30 is provided for generating the heated gas 20, for example a gas burner for heating ambient air 22 by means of a gas combustion element. In addition, a blower assembly 60 is provided which includes the fan 50 and the outlet channel 40 coupled downstream to the fan 50. Such a burner 30 and such a blower unit 60 can, according to an embodiment, be formed by already known and available to those skilled in the art, such as, for example, a known gas burner 30 and a leaf blower 60 or another suitable blower unit 60 that already has a blower 50 and a discharge channel 40. for sucking in ambient air 24 and blowing back out of this ambient air 26. As can be seen in step 70 of the method for manufacturing the device 1, the blower assembly 60 is coupled to the burner 30. As can be seen, the blower assembly 60 is coupled to the burner 30 such that, in operation, the blower fan 50 of the blower assembly 60 sucks in the heated gas 20 from the burner 30 and discharges it to the outlet channel 40. In other words, the outlet opening 32 of the burner 30. is coupled to the inlet opening 54 of the fan 50 of the blower assembly 60. Thus, in a simple manner by means of a simple coupling of a burner 30 and a blower assembly
    BE2018 / 5704
    1860 the device 1 can be manufactured by a simple adaptation to such an existing bladder assembly 60.
    Figure 4 shows a further variant embodiment of an apparatus 1 similar as described above with respect to Figures 1, 2A-C or 3 suitable for carrying out the method for controlling crops 10 by means of a heated gas 20. Similar elements are indicated with similar references and contain a similar structure and function as described above. As shown diagrammatically, this embodiment contains a few elements that are adapted to enable portable use of the device 1. Thus, as visible, the burner 30 and the fan 50 were mounted on a suitable frame 3, which is, for example, portable on the back of an operator 4 during the execution of the method described above by using the apparatus 1. As visible, in this embodiment, the drive 56 of the fan 50 is also mounted on the frame 3. However, it is clear that alternative embodiments are possible in which one or more of the elements described above are attached to the frame 3 by means of attachment to another element, instead of via a direct attachment to the frame 3. , similar to that described above, the discharge channel 40 has a pressure-increasing element 46 arranged at the outlet opening 52 of the fan 50. Although the pressure-increasing element 46 is shown schematically as an element that the flow opening of the discharge channel 40 at or near the outflow opening 52 of the fan 50, it is clear that alternative embodiments are possible as already mentioned above. According to the embodiment shown, the pressure-increasing element 46 comprises, for example, an adjustable pressure-increasing element 47, such as, for example, an adjustable valve 47, which can influence the flow of the heated ambient air 20, for example by means of an adjustable valve element, the flow opening of the discharge channel 40 ter height of the pressure increasing element 46, so that a desired value for the pressure increase
    BE2018 / 5704
    The flow rate of the heated air can also be adjusted by the operator 4, for example in function of the crop to be controlled or environmental parameters such as the temperature or the humidity. It is clear that the pressure-increasing element 46, possibly containing an adjustable pressure-increasing element 47, will always, similarly as described above, realize a sufficient pressure increase to effect the flame-extinguishing action of the fan 50. As further visible, the embodiment shown in Figure 4 comprises a discharge channel 40, for example a flexible part 48, for example a flexible tube or hose, which makes it possible for the operator 4 to direct the outflow opening 42 to the crops to be treated. Further, as visible, this embodiment, preferably downstream of this flexible part 48, includes a rigid, elongated part 49, such as, for example, a tube or channel, which is preferably long enough to be as shown when the operator 4 manipulates its upstream end the downstream end, which also forms the outflow end 42, is located near the bottom for treating the crops. It is clear, however, that many variant embodiments are possible, such an ergonomic configuration for a portable device 1 for carrying out the method described above being realized. As can be seen, with a portable device 1, the burner 30 and / or the fan 50 is preferably mounted furthest away from the operator 4 on the frame 3 so that the risk of contact with these warm elements is reduced. According to a variant embodiment, it is also possible to provide the frame 3 with wheels, and for example to design it as a trolley that the operator 4 can move with it. According to another variant embodiment, the operator 4 can move such a trolley through the discharge channel 40, so that, for example, this trolley is designed such that it drags behind the discharge channel 40 manipulated by the operator 4.
    It is further clear that the use of an apparatus 1 as described above for controlling crops by means of heated gas 20
    BE2018 / 5704
    Suitably, blows the heated air down onto the crop to be controlled. That is, the device 1 discharges the heated air 20 from the outflow opening 42 of the discharge channel 40 in a downward direction directed towards the ground surface. That is, at a suitable angle to the ground surface in the range of 30 ° to 150 °, preferably 60 ° to 120 °, for example 75 ° to 105 °, for example 90 ° + / - 5 ° with respect to the ground surface.
    It is clear that, in addition to the embodiments described above, numerous variant embodiments and further combinations are possible without departing from the scope of protection as defined by the claims.
    权利要求:
    Claims (15)
    [1]
    A method for controlling crops (10) by means of a heated gas (20) which is generated in a burner (30) and via an outflow opening (42) from a discharge channel (40) to the crops to be controlled (10) ),
    Hence, a fan (50) is provided between the burner (30) and the drain (40) so that the fan (50), during operation, sucks the heated gas (20) from the burner (30) and discharges it to the drain (40) and thereby has a flame-retardant effect.
    [2]
    A method according to claim 1, wherein:
    - an inlet opening (44) of the outlet channel (40) is connected to an outlet opening (52) of the fan (50) and the outlet channel (40) forms a closed circuit for the heated gas (20) from the inlet opening (44) to at the outflow opening (42) where the crops to be controlled (10) are exposed to the heated gas (20); and
    - an outlet opening (32) of the burner (30) is connected to an inlet opening (54) of the fan (50) for sucking in the gas (20) heated by the burner (30).
    [3]
    A method according to claim 1 or 2, wherein no elements are provided in or after the discharge channel (40) that at least partially disrupt the flow of heated gas (20).
    [4]
    A method according to any one of the preceding claims, wherein no burner is arranged in or downstream of the discharge channel (40); and / or no burner is installed downstream of the fan (50).
    BE2018 / 5704
    [5]
    A method according to any one of the preceding claims, wherein a pressure-increasing element (46) is arranged at the outlet opening (52) of the fan (50).
    [6]
    A method according to any one of the preceding claims, wherein:
    - the pressure of the heated gas (20) is increased by the fan (50) by at least 0.05 bar, preferably in the range of 0.1 to 2 bar;
    - the flow rate of the heated gas (20) through the fan (50) is brought to a value in the range of 0.3 m 3 / s to 7 m 3 / s;
    - the burner (30) heats the heated gas (20) so that it has a temperature of at least 50 ° C at the level of the outflow opening (42) of the discharge channel (40), preferably a temperature of at least 80 ° C, at preferably a temperature in the range of 100 ° C to 300 ° C, for example a temperature in the range of 125 ° C to 150 ° C.
    [7]
    A method according to any one of the preceding claims, wherein:
    - the burner (30) is selected from one of the following types:
    - a gas burner;
    - a liquid fuel burner;
    - a solid fuel burner;
    - the fan (50) is selected from one of the following types:
    - a centrifugal fan;
    - an axial fan; and / or
    - the heated gas (20) contains ambient air supplied through an inlet opening (34) of the burner (30) and heated up by the burner (30).
    [8]
    An apparatus (1) for controlling crops by means of a heated gas (20), comprising:
    - a burner (30) configured to generate the heated gas (20); and
    - a discharge channel (40) with an outlet opening (42) configured to feed the heated gas (20) to the crops to be controlled,
    THAT IS THAT CHARACTERIZED
    BE2018 / 5704
    -23 The device (1) further contains:
    - a fan (50) arranged between the burner (30) and the discharge channel (40) configured so that the fan (50), during operation, draws in the heated gas (20) from the burner (30) and discharges it to the discharge channel (40) ) and thereby has a flame-retardant effect.
    [9]
    A device according to claim 8, wherein:
    - the burner (30) has an outlet opening (32) for the gas (20) heated by the burner;
    - the fan (50) includes an inlet port (54) and an outlet port (52); and
    - the discharge channel (40) comprises an inlet opening (44) and an outflow opening (42); and where:
    - the inlet opening (44) of the outlet channel (40) is connected to the outlet opening (52) of the fan (50) and the outlet channel (40) forms a closed circuit for the heated gas (20) from the inlet opening (44) to at the outflow opening (42) where the crops to be controlled (10) are exposed to the heated gas (20); and
    - the outlet opening (32) of the burner (30) is connected to the inlet opening (54) of the fan (50) for sucking in the gas (20) heated by the burner (30).
    [10]
    An apparatus according to claim 8 or 9, wherein the apparatus (1) does not contain elements which are arranged in or after the discharge channel (40) and which at least partially disrupt the flow of heated gas (20).
    [11]
    An apparatus according to any one of claims 8 to 10, wherein the apparatus (1) does not contain a burner arranged in or downstream of the discharge channel (40); and / or the device does not contain a burner which is arranged downstream of the fan (50).
    BE2018 / 5704
    [12]
    An apparatus according to any of claims 8 to 11, wherein the apparatus (1) comprises a pressure-increasing element (46) disposed at the outlet opening (52) of the fan (50).
    [13]
    A device according to any of claims 8 to 12, wherein:
    - the fan (50) is configured to increase the pressure of the heated gas (20) by at least 0.05 bar, preferably in the range of 0.1 to 2 bar;
    - the fan (50) is configured to bring the flow rate of the heated gas (20) to a value in the range of 0.3 m 3 / s to 7 m 3 / s;
    - the burner (30) is configured to heat the heated gas (20) such that it has a temperature of at least 50 ° C at the level of the outlet opening (42) of the discharge channel (40), preferably a temperature of at least 50 ° C 80 ° C, preferably a temperature in the range of 100 ° C to 300 ° C, for example a temperature in the range of 125 ° C to 150 ° C.
    [14]
    An apparatus according to any of claims 8 to 13, wherein:
    - the burner (30) is selected from one of the following types:
    - a gas burner;
    - a liquid fuel burner;
    - a solid fuel burner;
    - the fan (50) is selected from one of the following types:
    - a centrifugal fan;
    - an axial fan; and / or
    - the burner contains an inlet opening (34) for ambient air, and the heated gas (20) contains ambient air supplied through an inlet opening (34) of the burner (30) and warmed up by the burner (30).
    [15]
    A method of manufacturing an apparatus according to one or more of claims 8 to 14, comprising the following steps:
    - providing the burner (30) for generating the heated gas;
    BE2018 / 5704 -25-
    - providing a blower assembly (60) comprising the fan (50) and the outlet channel (40) coupled downstream to the fan;
    - coupling the blower assembly (60) to the burner (30) so that the fan (50) of the blower assembly (60), during operation, the heated gas
    5 (20) aspirates from the burner (30) and discharges to the discharge channel (40).
    类似技术:
    公开号 | 公开日 | 专利标题
    WO2019115820A1|2019-06-20|A method and apparatus for controlling vegetation by means of a heated gas
    JP2007255747A|2007-10-04|Wood pellet fuel combustion apparatus
    BE1025784B1|2019-07-15|A METHOD AND APPARATUS FOR COMBATING CROPS THROUGH A HEATED GAS
    US8776773B1|2014-07-15|Air impingement tunnel oven
    JP2016118305A|2016-06-30|Grain dryer
    WO2013187561A1|2013-12-19|Oven having pyrolysis function
    US2018505A|1935-10-22|Drier
    KR101548084B1|2015-08-27|Oven
    US3261597A|1966-07-19|Space heater
    BE1027176B1|2020-10-28|A DEVICE AND METHOD FOR CONTROLLING CROPS WITH A HEATED AIRFLOW
    US2579158A|1951-12-18|Heating system
    US3079981A|1963-03-05|Burner apparatus
    JPS58104430A|1983-06-21|Exhaust gas discharging means for heating cooker
    KR101477167B1|2014-12-30|Burner system of the tube type heater
    US2841381A|1958-07-01|Tobacco curer
    KR101753782B1|2017-07-20|fuel include type a hybrid burner
    US2716975A|1955-09-06|Combustion type air heater for drying purposes
    AU2020350136A1|2022-03-17|An apparatus and method for combating crops with a heated air flow
    JP3722226B1|2005-11-30|Waste oil stove
    JP2013068406A|2013-04-18|Heating cooker
    US1585410A|1926-05-18|Air-heating apparatus
    JP2008045865A|2008-02-28|Grain dryer
    JP6822653B2|2021-01-27|Combustion device and heat supply system using it
    US3312266A|1967-04-04|Oil burner system
    JP6741295B2|2020-08-19|Dryer
    同族专利:
    公开号 | 公开日
    CA3083980A1|2019-06-20|
    BE1025784A1|2019-07-10|
    BE1025425B1|2019-02-13|
    EP3723480A1|2020-10-21|
    US20200383312A1|2020-12-10|
    AU2018382605A1|2020-07-02|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE1012109B|1955-10-18|1957-07-11|Elek Sche Anlagen A G Ges|Device for the protection of wine, fruit and other free cultures|
    US3112742A|1961-10-09|1963-12-03|Max G Merz|Weed burner|
    BE677196A|1966-07-13|1966-08-01|
    US5934013A|1996-11-27|1999-08-10|Barra; Florencio Lazo|Agricultural heating control method|
    BE1017053A3|2006-03-16|2008-01-08|Lazo Europ Nv|METHOD FOR AVOIDING FROST DAMAGE IN CROPS AND / OR ENHANCING FRUIT SETTING AT LOW TEMPERATURES AND DEVICE APPLIED IN SUCH METHOD.|
    US20110277373A1|2010-05-14|2011-11-17|Robbins Donald D|Burrowing rodent extermination device|
    法律状态:
    2019-08-21| FG| Patent granted|Effective date: 20190715 |
    优先权:
    申请号 | 申请日 | 专利标题
    BE2017/5944A|BE1025425B1|2017-12-15|2017-12-15|A METHOD AND APPARATUS FOR COMBATING CROPS THROUGH A HEATED GAS|
    BEBE2017/5944|2017-12-15|PCT/EP2018/085091| WO2019115820A1|2017-12-15|2018-12-14|A method and apparatus for controlling vegetation by means of a heated gas|
    CA3083980A| CA3083980A1|2017-12-15|2018-12-14|A method and apparatus for controlling vegetation by means of a heated gas|
    EP18827018.5A| EP3723480A1|2017-12-15|2018-12-14|A method and apparatus for controlling vegetation by means of a heated gas|
    US16/772,539| US20200383312A1|2017-12-15|2018-12-14|A method and apparatus for controlling vegetation by means of a heated gas|
    AU2018382605A| AU2018382605A1|2017-12-15|2018-12-14|A method and apparatus for controlling vegetation by means of a heated gas|
    [返回顶部]