Gas-electric integrated heating device

Abstract

The application discloses a gas-electricity integrated heating device, which comprises a fan and a filter arranged outside a boiler, air flows into the boiler after being filtered by the filter driven by the fan, and further comprises a gas heating module and an electric heating module arranged in the boiler, the gas heating module and the electric heating module are switched based on the change of the temperature in the boiler, the gas heating module comprises a premixer and a burner, air and gas are mixed in the premixer and then enter a premixing cavity, and the mixed gas is sprayed into a combustion cavity by the burner for combustion, the burner comprises a plate body arranged in the combustion cavity, and a plurality of main combustion heads are uniformly arranged on the plate body, a plurality of spray baffles are uniformly arranged in the spray port of the main combustion head in the circumferential direction, a first elastic member is arranged between each spray baffle and the plate body, each spray baffle hinders the mixed gas from being sprayed out of the spray port under the elastic force of the first elastic member, and the swing angle of the spray baffle changes based on the pressure action of the mixed gas.

Description

Technical Field

[0001] This invention relates to the field of burner technology, specifically to a gas-electric integrated heating device. Background Technology

[0002] As is well known, due to environmental protection requirements, coal-fired boilers are subject to emission standards, namely, the emission limit for nitrogen oxides should be lower than 30 mg / m³. The combustion of gas in a coal-fired boiler is flaming combustion, which can be divided into diffusion combustion and premixed combustion.

[0003] Diffusion combustion is a type of combustion in which the combustible and oxidant molecules do not come into sufficient contact and mix before entering the combustion reaction zone. This type of combustion results in uneven flames and is easily affected by factors such as changes in ambient temperature and airflow, thereby increasing nitrogen oxide emissions.

[0004] Premixed combustion refers to combustion in which the combustible and oxidizing molecules are in contact and fully mixed before entering the combustion reaction zone. This combustion method results in more complete combustion of natural gas, achieving low nitrogen, low consumption, and low noise. For example, patent application CN117588749A, published on February 23, 2024, entitled "A Fully Premixed Water-Cooled Wall Burner Head Device," describes a device comprising: a premixer installed on the side of a boiler, having a gas inlet and an air inlet, used to mix gas and air in a set ratio to form a high-pressure, ready-to-burn mixture; a water-cooled burner installed on the outlet side of the premixer to provide heat to the boiler; a flame arrester installed on the outlet side of the premixer, located between the outlet and the water-cooled burner; and a cooling pipe arranged between the flame arrester and the water-cooled burner, used to exchange heat and cool the water-cooled burner after cooling water is introduced, absorbing the heat radiated by the boiler onto the water-cooled burner.

[0005] The shortcoming of the existing technology is that the size of the nozzle used by the combustion head to inject the mixed gas is fixed, which cannot be precisely adapted to different flow rate changes. That is, when more combustion heat is needed per unit time, the amount of gas consumed must be increased. However, since the size of the combustion head is fixed, the gas ejection speed must be increased in order to eject a certain amount of gas per unit time. This will cause the flame on the surface of the combustion head to be too long, which will lead to incomplete combustion when it comes into contact with the surface of the heat exchanger. Summary of the Invention

[0006] The purpose of this invention is to provide an integrated gas-electric heating device to solve the technical problems in related technologies.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] The gas-electric integrated heating device includes a fan and a filter located outside the boiler. The fan drives airflow through the filter before it enters the boiler. It also includes a gas heating module and an electric heating module located inside the boiler. Based on changes in the boiler temperature, the gas heating module switches between the two. The gas heating module includes a premixer and a burner. Air and gas are mixed in the premixer and then enter the premixing chamber, where they are sprayed out by the burner and burned. The burner includes a plate located within the combustion chamber, on which several main combustion heads are evenly arranged. Multiple injection baffles are evenly oscillating circumferentially within the injection nozzles of the main combustion heads. Each injection baffle is connected to the plate by a first elastic element. Under the elastic force of the first elastic element, each injection baffle obstructs the mixed gas from being ejected from the injection nozzle. The oscillation angle of the injection baffles changes based on the pressure of the mixed gas.

[0009] As mentioned above, both ends of the swing shaft of the spray baffle are provided with bevel gears. When two bevel gears at close positions mesh within the same spray port, the two spray baffles at adjacent positions swing synchronously.

[0010] As described above, a first groove is provided on the plate body at the position between adjacent main combustion heads, and a first slider is slidably provided in each first groove. A first rod with telescopic function is provided between the swing shaft of the injection baffle at a close position and the first slider. The two first rods connected to the same first slider transmit power through gear meshing. In the sliding direction, a first elastic element is provided between the first slider and the plate body.

[0011] As mentioned above, the cross-section of the injection baffle is wedge-shaped along the direction perpendicular to the gas injection.

[0012] As described above, each of the first chutes is provided with an air inlet and a gas inlet, and each of the injection baffles is provided with an injection air passage, which is connected to the first chutes through an air pipe.

[0013] As described above, a first cover plate is slidably provided on the air inlet, and a second elastic element is connected between the first cover plate and the plate body in the sliding direction. A second cover plate is slidably provided on the gas inlet, and a third elastic element is connected between the second cover plate and the plate body in the sliding direction. A shaft is rotatably provided in the first sliding groove. The first slider and the shaft are connected by an inelastic pull rope, which is wound around the shaft. A second rod is provided on the shaft. During the swing stroke of the second rod, the first cover plate gradually opens the air inlet based on the push of one end of the second rod, and the second cover plate gradually opens the gas inlet based on the push of the other end of the second rod.

[0014] As described above, a second slide groove is provided in the first slide groove, and a second slider is slidably provided in the second slide groove. The second slider is fixed in the second slide groove by bolts, and the shaft is rotatably mounted on the second slider.

[0015] As mentioned above, the plate is also provided with an auxiliary combustion head. When the injection baffle swings to the maximum position, the auxiliary combustion head is connected to the first sliding groove.

[0016] As described above, the auxiliary combustion head is slidably disposed on the plate body along the mixed gas injection direction, and a fourth elastic element is provided between the auxiliary combustion head and the plate body in the sliding direction. The injection baffle is provided with a squeezing block. During the swing stroke of the injection baffle, the squeezing block gradually squeezes the auxiliary combustion head, so that the injection port of the auxiliary combustion head is connected to the first sliding groove.

[0017] As described above, the extrusion block is slidably disposed on the injection baffle, and a fifth elastic element is provided between the extrusion block and the injection baffle in the sliding direction. After the injection port of the auxiliary combustion head is connected to the first sliding groove, the injection baffle continues to swing, and the extrusion block blocks the injection passage.

[0018] The beneficial effects of this invention are as follows: by providing multiple injection baffles in the injection port of the main combustion head, and utilizing the elastic force of the first elastic element, the injection baffles can overcome the elastic force of the first elastic element and swing under the pressure of the mixed gas. Thus, the opening and closing size of the injection port is limited by the injection baffles. Therefore, under the action of the injection baffles, the opening and closing size of the injection port can be changed according to the change in the amount of mixed gas entering, so as to achieve that while a certain amount of gas is injected per unit time, the gas injection speed can be matched with it, avoiding the problem that the flame on the surface of the main combustion head is too long and contacts the surface of the heat exchanger, resulting in incomplete combustion. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 This is a schematic diagram of the planar structure of the gas-electric integrated heating device provided in an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the planar structure of the gas heating module of the gas-electric integrated heating device provided in an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the burner cross-sectional structure of the gas-electric integrated heating device provided in an embodiment of the present invention;

[0023] Figure 4 for Figure 3 Enlarged structural diagram at point A in the diagram;

[0024] Figure 5 for Figure 3 Enlarged structural diagram at point B in the diagram;

[0025] Figure 6 This is a schematic cross-sectional view of the main combustion head of the gas-electric integrated heating device provided in an embodiment of the present invention, along the direction perpendicular to the flow of the mixed gas.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Housing; 10. Premixing chamber; 11. Combustion chamber; 12. Gas heating module; 13. Electric heating module; 2. Premixer; 3. Burner; 30. Plate; 31. Main combustion head; 32. Injection baffle; 33. Bevel gear; 34. First slide groove; 35. First slider; 36. First rod; 37. Gear; 38. Air inlet; 39. First cover plate; 40. Gas inlet; 41. Second cover plate; 42. Shaft; 43. Second rod; 44. Second slide groove; 45. Second slider; 46. Auxiliary combustion head; 47. Extrusion block; 48. Injection air passage; 49. Gas pipe; 50. Pull rope; 6. Filter; 7. Fan. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solution of the present invention, the following will be described in conjunction with the appendix. Figure 1 To be continued Figure 6 The present invention will now be described in further detail.

[0029] One embodiment of the present invention relates to a gas-electric integrated heating device, including a fan 7 and a filter 6 located outside the boiler. The fan 7 drives air to flow through the filter 6 and enter the boiler. The device also includes a gas heating module 12 and an electric heating module 13 located inside the boiler. Based on the temperature change inside the boiler, the gas heating module 12 and the electric heating module 13 are switched. The gas heating module 12 includes a premixer 2 and a burner 3. Air and gas are mixed in the premixer 2 and then enter the premixing chamber 10, and are sprayed out by the burner 3 into the combustion chamber 11 for combustion. The burner 3 includes a plate 30 located in the combustion chamber 11, and a plurality of main combustion heads 31 are evenly arranged on the plate 30. A plurality of injection baffles 32 are evenly oscillating around the injection port of the main combustion head 31, and a first elastic element is provided between each injection baffle 32 and the plate 30. Under the elastic force of the first elastic element, each injection baffle 32 prevents the mixed gas from being sprayed out of the injection port. The oscillation angle of the injection baffle 32 changes based on the pressure of the mixed gas.

[0030] Specifically, in some cases where a boiler is used to heat a target object, gas heating is first used to heat the target object, and then electric heating is used to maintain the temperature of the heated target object. This is because although electric heating is more efficient than gas heating, its heating speed is slower. Gas heating equipment can adjust the heat and increase the gas volume, while the voltage is generally fixed. Electricity is a secondary energy source, and its cost is higher than that of gas. Therefore, the operating cost of electric heating equipment is higher than that of gas heating equipment. Moreover, the temperature of gas heating is not easy to control. Therefore, combining gas heating and electric heating can achieve high thermal efficiency and make the target object heated evenly and stably. The switching between the gas heating module 12 and the electric heating module 13 can be determined by setting a temperature sensor. After the gas heating module 12 heats the temperature inside the boiler to the specified temperature range, the temperature sensor transmits a signal to the electric heating module 13, and then the electric heating module 13 maintains the temperature of the boiler based on this signal. Conversely, when the temperature of the boiler falls below the specified temperature range, the temperature sensor transmits a signal to the gas heating module 12, and the gas heating module 12 starts to work and heat the boiler until the temperature reaches the specified range.

[0031] In this embodiment, the fan 7 drives the gas to be filtered by the filter 6. The gas heating equipment mixes the gas and air in a certain proportion (the air-fuel ratio of natural gas is between 9 and 10.5) through the premixer 2. The mixed gas is then sprayed out by the main burner 31 and ignited by the ignition unit for surface combustion. Reasonable control of the gas-air ratio can make the flame spread speed fast, the combustion chamber volume heat intensity high, and complete combustion can be achieved with a very small excess space coefficient. There is almost no chemical incomplete combustion phenomenon, so the amount of nitrogen oxides produced is significantly reduced. Therefore, nitrogen oxide emissions can be reduced. The electric heating module is not shown in the figure. It is prior art and will not be described in detail here.

[0032] However, the nozzle size of the main burner 31 used to inject the mixed gas is fixed, and it cannot accurately adapt to different flow rate changes. That is, when more combustion heat is needed per unit time, the gas consumption must be increased. Since the size of the main burner 31 is fixed, the most direct way to inject a certain amount of gas per unit time is to replace the main burner 31. Since the specifications of the main burner 31 are changed, the premixer 2, gas pipeline and other accessories need to be changed. If the main burner 31 and related accessories are not replaced, the gas injection speed must be increased. This will cause the flame on the surface of the main burner 31 to be too long and contact the surface of the heat exchanger, resulting in incomplete combustion.

[0033] In this embodiment, the nozzle size of the main combustion head 31 can be set to a larger size than the original. Multiple injection baffles 32 are then evenly oscillating around the nozzle. One end of each injection baffle 32 is rotatably connected to the main combustion head 31 via a swing shaft. A first elastic element is arranged on the main combustion head 31. The elastic force of the first elastic element allows the other ends of the multiple injection baffles 32 within the same nozzle to abut against each other. When no mixed gas is passing through, the elastic force of the first elastic element will cause the other ends of the multiple injection baffles 32 to abut against each other, sealing the nozzle. In this embodiment, preferably, four injection baffles 32 are provided in each nozzle. When the other ends of the four injection baffles 32 abut against each other, the space enclosed by the four injection baffles 32 forms a quadrangular pyramid structure. That is, if mixed gas enters the nozzle, the flow direction of the mixed gas has an angle greater than 90 degrees and less than 180 degrees with the length direction of the injection baffles 32. As the pressure of the mixed gas changes... Under pressure, the mixing baffle overcomes the elastic force of the first elastic element, and the originally closed state of the injection port gradually opens, allowing the mixed gas to be injected into the combustion chamber 11 and ignited. When the mixed gas delivery volume increases, and the injection port size remains unchanged, the mixed gas pressure increases, and the flow velocity of the mixed gas injected from the injection port will inevitably increase significantly. In this embodiment, the size of the injection port can change with the mixed gas delivery volume, so the mixing pressure increases, which obviously causes the swing angle of the injection baffle 32 to increase. Then the mixed gas pressure decreases, and the flow velocity of the mixed gas also decreases. Moreover, the flow rate of the mixed gas does not decrease. Therefore, while obtaining more heat, it can also avoid the flame on the surface of the main combustion head 31 becoming too long due to excessive pressure. It should be noted that under the minimum load, the flow velocity of the mixed gas at each point on the main combustion head 31 should be greater than the flame propagation velocity. This can avoid the occurrence of backfire problem. At the same time, the uniform airflow distribution also ensures the uniformity of the surface flame.

[0034] The beneficial effects of the present invention are as follows: by providing multiple injection baffles 32 in the injection port of the main combustion head 31, and utilizing the elastic force of the first elastic element, the injection baffles 32 can overcome the elastic force of the first elastic element and swing under the pressure of the mixed gas. Thus, the opening and closing size of the injection port is limited by the injection baffles 32. Therefore, under the action of the injection baffles 32, the opening and closing size of the injection port can be changed according to the change of the amount of mixed gas entering, so as to achieve that while a certain amount of gas is injected per unit time, the gas injection speed can be matched with it, avoiding the problem that the flame on the surface of the main combustion head 31 is too long and contacts the surface of the heat exchanger, resulting in incomplete combustion.

[0035] Furthermore, both ends of the swing shaft of the spray baffle 32 are provided with bevel gears 33. When two bevel gears 33 in close proximity mesh with each other in the same spray port, the two spray baffles 32 in adjacent positions swing synchronously.

[0036] Specifically, since the mixed gas in the combustion chamber 11 generates a large amount of heat during combustion, in the prior art, a water-cooled wall tube is installed near the main combustion head 31 in the mixing chamber (this is prior art, which will not be elaborated on here, and is not shown in the figure). The heat on the main combustion head 31 is carried away through heat exchange. However, after being heated and used for a long time, when subjected to the same pressure of the mixed gas, some of the first elastic elements can no longer provide the initial elastic force to the injection baffle 32. The pressure will then act on the area with less resistance. As a result, under the same pressure, some of the four injection baffles 32 at the same injection port will swing at a larger angle, some at a smaller angle, or even not swing at all. Thus, the mixed gas ejected from the injection port deviates from the axial center of the injection port, resulting in uneven flame when the mixed gas undergoes surface combustion.

[0037] Therefore, in this embodiment, bevel gears 33 are installed at both ends of the swing shaft of each spray baffle 32. The near ends of two adjacent swing shafts can mesh with the two bevel gears 33. In this way, when one swing shaft swings, the other will be swinged along with it. Thus, the four spray baffles 32 in the same spray port can swing synchronously, avoiding the above-mentioned problems.

[0038] Furthermore, the plate 30 is provided with a first groove 34 at the position between adjacent main combustion heads 31, and a first slider 35 is slidably provided in each first groove 34. A first rod 36 with telescopic function is provided between the swing shaft of the injection baffle 32 at a close position and the first slider 35. The two first rods 36 connected to the same first slider 35 transmit power through gear 37 meshing. In the sliding direction, a first elastic element is provided between the first slider 35 and the plate 30.

[0039] Specifically, since the mixed gas delivered to the premixing chamber 10 is pressurized, and similarly, due to the first elastic element and the influence of the direction of the mixed gas input, some injection ports may be opened, while others may not be opened due to low gas pressure.

[0040] In this embodiment, the swing shafts of two adjacent spray baffles 32 in two adjacent spray nozzles are linked. That is, when one spray baffle 32 swings, its swing shaft will drive the first rod 36 connected to it to swing. The swing of the first rod 36 will push the first slider 35 to move in the first slide groove 34. The first rod 36 and the first slider 35 are rotatably connected. The ends of the two first rods 36 connected to the same first slider 35 are driven by two gears 37 meshing. So, while one first rod 36 pushes the first slider 35 to move, it also rotates with the first slider 35. In this way, the power is transmitted to the other first rod 36 through the meshing of the gears 37. The other first rod 36 will drive the swing shaft connected to it to swing. It can be seen that the swing of each spray baffle 32 can also drive the adjacent spray baffles 32 in the adjacent spray nozzles to swing. So, after the mixed gas enters the premixing chamber 10, the gas pressure can make each spray nozzle open.

[0041] Preferably, the cross-section of the injection baffle 32 is wedge-shaped along the direction perpendicular to the gas injection. Specifically, the wedge-shaped structure can disperse and cut the mixed gas ejected from the injection port, that is, it can be divided into four intersecting airflows in a cross shape. When two adjacent airflows are burning, there is a gap between them. Due to the combustion, the pressure in this gap decreases, so the gas after combustion in the combustion chamber 11 will enter the position between the two adjacent airflows due to the negative pressure, and then be driven by the two airflows to undergo secondary combustion. This can further reduce the generation of harmful gases.

[0042] In another embodiment of the present invention, each of the first slide grooves 34 is provided with an air inlet 38 and a gas inlet 40, and each of the injection baffles 32 is provided with an injection air passage 48, which is connected to the first slide groove 34 through an air pipe 49.

[0043] Specifically, when it is necessary to obtain more heat on the existing basis, more mixed gas needs to be introduced per unit time. However, the diameter of the mixed gas delivery pipe is limited, and when the flow direction of the mixed gas is parallel or nearly parallel to the length direction of the injection baffle 32, the injection baffle 32 cannot continue to swing under the action of air pressure, and the opening diameter of the injection nozzle cannot continue to increase. Therefore, in this embodiment, a gas delivery channel and an air delivery channel (not shown in the figure) are opened on the plate 30. Gas and air enter from the gas inlet 40 and air inlet 38 respectively (gas inlet 40 and air inlet 38 are located at...). Figure 3(The middle part is marked with a dotted line, please refer to the position indicated by the number) After entering the chute, it can be mixed, and then enter the injection air passage 48 on the injection baffle 32 through the air pipe 49. The mixed gas is injected into the combustion chamber 11 and ignited. This can solve the problem of limited mixed gas delivery per unit time when more heat is needed. The air pipe is slidably inserted into the plate 30, and the sliding trajectory is an arc. The center of the arc coincides with the swing circle of the injection baffle 32 connected to it in the axial direction.

[0044] However, the amount and ratio of the supplied gas and air mixture should also be controlled. For example, if the gas mixture supplied by the premixer 2 is a fully premixed gas (i.e., the air-fuel ratio is between 9 and 10.5), and the gas mixture supplied by the other is a partially mixed gas (i.e., the amount of gas is greater than the amount of air), the fully premixed gas will burn leanly during combustion, and its flame will be shorter. The partially mixed gas will burn richly during combustion. Due to insufficient air, the flame will be elongated, and the rich combustion will be on the periphery of the lean combustion. This can reduce the heating efficiency and lower the overall flame temperature. Due to the compression of the gas on the periphery of the flame during rich combustion, the flame will tilt inward. The rich combustion flame will heat the flue gas of the lean combustion flame, thus lowering the combustion temperature. When used in conjunction with water-cooled wall tubes, it can further protect the main burner head 31.

[0045] In this embodiment, a first cover plate 39 is slidably provided on the air inlet 38, that is, a slide channel is opened in the slide groove for the first cover plate 39 to slide. A second elastic element is connected between the first cover plate 39 and the plate body 30 in the sliding direction. A second cover plate 41 is slidably provided on the gas inlet 40, that is, a slide channel is opened in the slide groove for the second cover plate 41 to slide. The sliding directions of the first cover plate 39 and the second cover plate 41 are both parallel to the sliding direction of the first slider 35. A third elastic element is connected between the second cover plate 41 and the plate body 30 in the sliding direction. A shaft 42 is rotatably provided in the first slide groove 34. The first slider 35 and the shaft 42 are connected by an inelastic pull rope 50. The pull rope 50 is wound around the shaft 42. A second rod 43 is provided on the shaft 42. The second rod 43 is eccentrically arranged on the shaft 42. During the swing stroke of the second rod 43, the first cover plate The air inlet 38 is gradually opened by pushing one end of the second rod 43, and the gas inlet 40 is gradually opened by pushing the other end of the second rod 43. That is, when the gas and air need to be partially mixed, the gas volume is greater than the air volume. The shorter section of the second rod 43 can be aligned with the first cover 39 and the longer section with the second cover 41. In this way, when the same deflection angle is turned, the longer section swings for a longer distance. That is, the moving distance of the second cover 41 is greater than the moving distance of the first cover 39. As a result, the opening degree of the air inlet 38 is less than the opening degree of the gas inlet 40. When the pipe diameter of the gas is the same, the greater the opening degree, the greater the flow rate per unit time. Therefore, the swing angle of the injection baffle 32 is proportional to the deflection angle of the second rod 43. In this way, the center of the main burner head 31 is always lean and the surrounding area is rich.

[0046] Preferably, a second slide groove 44 is provided in the first slide groove 34, and a second slider 45 is slidably provided in the second slide groove 44. The second slider 45 is fixed in the second slide groove 44 by bolts, and the shaft 42 is rotatably mounted on the second slider 45. Specifically, in the aforementioned embodiment, the second rod 43 is eccentrically arranged on the shaft 42, that is, the connection point between the two is closer to the first cover plate 39. Therefore, according to actual needs, by adjusting the movement of the second slider 45 in the second slide groove 44, the distance between the connection point of the second rod 43 and the shaft 42 and the first cover plate 39 can be controlled, thereby controlling the amount of gas and air mixed.

[0047] In another embodiment of the present invention, the plate 30 is further provided with an auxiliary combustion head 46. When the injection baffle 32 swings to its maximum position, the auxiliary combustion head 46 communicates with the first slide groove 34. Specifically, when the injection baffle 32 swings to its maximum position, that is, when the flow direction of the mixed gas is parallel to the length direction of the injection baffle 32, the amount of mixed gas injected by the main combustion head 31 reaches its limit. However, since the injection channel is opened on the injection baffle 32, and the volume of the injection baffle 32 is limited, it will be difficult to meet the conditions for rich combustion and lean combustion. Therefore, in this embodiment, an auxiliary combustion head 46 is provided on the plate 30 between two adjacent main combustion heads 31. The amount of mixed gas injected per unit time is set to be greater than that of the injection channel. When the swing angle of the injection baffle 32 reaches its maximum, the auxiliary combustion head 46 communicates with the first slide groove 34, that is, the auxiliary combustion head 46... The auxiliary burner head 46 is slidably disposed on the plate 30 along the direction of mixed gas injection. In the sliding direction, a fourth elastic element is provided between the auxiliary burner head 46 and the plate 30. A squeezing block 47 is provided on the injection baffle 32. During the swing stroke of the injection baffle 32, the squeezing block 47 gradually squeezes the auxiliary burner head 46. The squeezing effect can be achieved by wedge-shaped cooperation between the two, so that the injection port of the auxiliary burner head 46 is connected to the first slide groove 34. After the auxiliary burner head 46 is working, the conditions for rich combustion and lean combustion can be basically met. Then the injection channel cannot separate part of the mixed gas. Therefore, in this embodiment, the squeezing block 47 is slidably disposed on the injection baffle 32. In the sliding direction, a fifth elastic element is provided between the squeezing block 47 and the injection baffle 32. After the injection port of the auxiliary burner head 46 is connected to the first slide groove 34, the injection baffle 32 continues to swing, and the squeezing block 47 blocks the injection channel.

[0048] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of the claims of the present invention.

Claims

1. A gas-electric integrated heating device, comprising a gas heating module and an electric heating module, wherein the gas heating module includes a housing, the housing being divided into a premixing chamber and a combustion chamber, the premixing chamber being connected to a premixer, and a burner being disposed on the gas outlet side of the premixer, wherein air and gas are mixed in the premixer and then sprayed out by the burner for combustion in the combustion chamber, characterized in that, The burner includes a plate body disposed in the combustion chamber, and a plurality of main combustion heads are evenly arranged on the plate body; Multiple injection baffles are uniformly arranged circumferentially inside the injection nozzle of the main combustion head, and a first elastic element is provided between each injection baffle and the plate body. Under the elastic force of the first elastic element, each injection baffle prevents the mixed gas from being ejected from the injection nozzle; the swing angle of the injection baffle changes based on the pressure of the mixed gas. Both ends of the swing shaft of the spray baffle are provided with bevel gears. When two bevel gears at close positions mesh within the same spray nozzle, the two spray baffles at adjacent positions swing synchronously. The plate is provided with a first groove between adjacent main combustion heads. A first slider is slidably provided in each first groove. A first rod with telescopic function is provided between the swing shaft of the injection baffle at a close position and the first slider. The two first rods connected to the same first slider transmit power through gear meshing. In the sliding direction, a first elastic element is provided between the first slider and the plate.

2. The gas-electric integrated heating device according to claim 1, characterized in that, The cross-section of the jet baffle is wedge-shaped, perpendicular to the gas jet direction.

3. The gas-electric integrated heating device according to claim 1, characterized in that, Each of the first chutes is provided with an air inlet and a gas inlet, and each of the injection baffles is provided with an injection air passage, which is connected to the first chutes through an air pipe.

4. The gas-electric integrated heating device according to claim 3, characterized in that, A first cover plate is slidably provided on the air inlet. A second elastic element is connected between the first cover plate and the plate body in the sliding direction. A second cover plate is slidably provided on the gas inlet. A third elastic element is connected between the second cover plate and the plate body in the sliding direction. A shaft is rotatably provided in the first slide groove. The first slider and the shaft are connected by an inelastic pull rope. The pull rope is wound around the shaft. A second rod body is provided on the shaft. During the swing stroke of the second rod, the first cover plate gradually opens the air inlet based on the push of one end of the second rod, and the second cover plate gradually opens the gas inlet based on the push of the other end of the second rod.

5. The gas-electric integrated heating device according to claim 4, characterized in that, The first slide groove has a second slide groove, and the second slide block is slidably mounted in the second slide groove. The second slide block is fixed in the second slide groove by bolts, and the shaft is rotatably mounted on the second slide block.

6. The gas-electric integrated heating device according to claim 4, characterized in that, The plate is also provided with an auxiliary combustion head. When the spray baffle swings to the maximum position, the auxiliary combustion head is connected to the first slide groove.

7. The gas-electric integrated heating device according to claim 6, characterized in that, The auxiliary combustion head is slidably disposed on the plate body along the direction of mixed gas injection, and a fourth elastic element is provided between the auxiliary combustion head and the plate body in the sliding direction; the injection baffle is provided with a squeezing block. During the swing stroke of the injection baffle, the extrusion block gradually squeezes the auxiliary combustion head, causing the injection port of the auxiliary combustion head to connect with the first slide groove.

8. The gas-electric integrated heating device according to claim 7, characterized in that, The extrusion block is slidably disposed on the injection baffle, and a fifth elastic element is provided between the extrusion block and the injection baffle in the sliding direction. After the injection port of the auxiliary combustion head is connected to the first sliding groove, the injection baffle continues to swing, and the extrusion block blocks the injection passage.

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