WO2023185107A1 - Combustion device and gas water heater - Google Patents

Abstract

Embodiments of the present application relate to the technical field of fuel heating, and provide a combustion device and a gas water heater. The combustion device comprises a combustion chamber, and a fire grate at least partially located in the combustion chamber. The fire grate and the combustion chamber define a combustion cavity; there is at least one fire grate; each fire grate is formed with a first receiving cavity, an air supply cavity and groups of material mixing holes; the air supply cavity and the groups of material mixing holes are all located between the first receiving cavity and the combustion cavity; the air supply cavity is separately communicated with the first receiving cavity and the combustion cavity; there are a plurality of groups of material mixing holes corresponding to each fire grate; each group of material mixing holes comprises at least one material mixing hole; the material mixing hole is communicated with the air supply cavity; an opening at the end of the air supply cavity facing the combustion cavity is an air outlet; and along a length direction of the fire grate, the lengths of two adjacent groups of material mixing holes separately to a flow path corresponding to the air outlet are different. The combustion device and the gas water heater provided in the embodiments of the present application can reduce the possibility of thermoacoustic oscillation.

Description

Combustion device and gas water heater

Cross-references to related applications

This application is filed based on the Chinese patent application with application number 202210333886.6 and the filing date is March 30, 2022, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby incorporated into this application as a reference.

Technical field

This application relates to the technical field of fuel heating, and in particular to a combustion device and a gas water heater.

Background technique

In gas water heaters in the related art, the flame formed by the combustion device during the combustion process may produce thermoacoustic oscillations.

Contents of the invention

In view of this, embodiments of the present application are expected to provide a combustion device and a gas water heater to reduce the possibility of thermoacoustic oscillation.

In order to achieve the above object, the first aspect of the embodiment of the present application provides a combustion device, including:

combustion chamber; and

The fire row is at least partially located in the combustion chamber. The fire row and the combustion chamber are surrounded by a combustion chamber. The number of the fire row is at least one. Each of the fire rows forms a first receiving cavity and an air supply chamber. cavity and a mixing hole group. The air supply cavity and the mixing hole group are located between the first receiving cavity and the combustion chamber. The air supply cavity is connected to the first receiving cavity and the combustion chamber respectively. The combustion chamber is connected, and the number of the mixing hole groups corresponding to each of the fire rows is multiple. Each of the mixing hole groups includes at least one mixing hole, and the mixing hole is connected to the air supply. The cavity is connected, and the opening at one end of the air supply cavity toward the combustion chamber is an air outlet. Along the length direction of the fire row, two adjacent groups of mixing holes are connected to the flow path corresponding to the air outlet. are not equal in length.

In one embodiment, among the two adjacent mixing hole groups along the length direction of the fire row, one of the mixing hole groups is the first mixing hole group, and the other mixing hole group is the first mixing hole group. is a second mixing hole, the length of the flow path from the first mixing hole group to the corresponding air outlet and the length of the flow path from the second mixing hole group to the corresponding air outlet are not equal, so The first mixing hole group and the second mixing hole group are alternately arranged along the length direction of the fire row.

In one embodiment, along the length direction of the fire row, the length of the flow path from the mixing hole group to the corresponding air outlet changes periodically, and the flow path from the mixing hole group to the corresponding air outlet The length of the path first increases and then decreases or first decreases and then increases within a cycle.

In one embodiment, the first receiving chamber is used to receive primary air, the mixing hole is used to provide fuel to the air supply chamber, and the number of air supply chambers corresponding to each of the fire rows is at least one, The mixing hole groups are provided on opposite sides of each air supply chamber. The mixing holes of the mixing hole groups on both sides are arranged oppositely. The mixing holes on both sides are arranged relatively in the same direction as the mixing holes. The length direction of the fire rows is arranged crosswise.

In one embodiment, the length of the flow path from all mixing holes in each mixing hole group to the corresponding air outlet is equal, and the length of the flow path from each mixing hole group to the air outlet is equal to is the length of the flow path from the mixing hole to the air outlet.

In one embodiment, the first receiving chamber is used to receive primary air, the mixing hole is used to provide fuel to the air supply chamber, and the number of air supply chambers corresponding to each of the fire rows is one or more. along the length direction of the fire row, among all the mixing hole groups corresponding to each fire row, the mixing hole group located at one end of the air supply chamber is the third mixing hole group, so The length of the flow path from the third mixing hole group to the corresponding air outlet is the third distance, the mixing hole group located at the other end of the air supply chamber is the fourth mixing hole group, and the fourth mixing hole group The length of the flow path from the material hole group to the corresponding air outlet is the fourth distance, and the other mixing hole groups are located between the third mixing hole group and the fourth mixing hole group. The length of the flow path from the mixing hole group to the corresponding air outlet is greater than or equal to the larger of the third distance and the fourth distance.

In one embodiment, the number of the air supply chambers corresponding to each of the fire rows is multiple, and the plurality of air supply chambers are arranged at intervals along the length direction of the fire row, and each of the air supply chambers corresponds to One of the mixing hole groups.

In one embodiment, the first receiving chamber is used to receive primary air, the air supply chamber is used to receive primary air from the first receiving chamber, and the mixing hole is used to provide fuel to the air supply chamber. , the opening at one end of the first receiving chamber away from the air supply chamber is an air collection port, and the opening at one end of the air supply chamber toward the first receiving chamber is an air inlet, and all the overflows of the air collection port The sum of the areas is greater than the sum of the flow areas of all the air inlets.

In one embodiment, the first receiving chamber is used to receive primary air, the air supply chamber is used to receive primary air from the first receiving chamber, and the mixing hole is used to provide fuel to the air supply chamber. , the air supply chamber has a columnar structure, the flow cross section of the air supply chamber is the target cross section, the air supply chamber has a characteristic size, and the characteristic size is the hydraulic diameter of the air supply chamber or the diameter of the target cross section. The minimum span of the geometric center of the target section, the length of the flow path from the mixing hole to the corresponding air outlet is greater than or equal to the characteristic size, and the flow path from the mixing hole to the corresponding air outlet The length is less than or equal to ten times the characteristic dimension.

In one embodiment, the first receiving chamber is used to receive primary air, the air supply chamber is used to receive primary air from the first receiving chamber, and the mixing hole is used to provide fuel to the air supply chamber. , along the direction in which the first receiving chamber points to the air supply chamber, the flow area of the first receiving chamber gradually decreases, and the opening at one end of the first receiving chamber toward the air supply chamber is a transition port , projected along the arrangement direction of the first receiving chamber and the air supply chamber, the opening of one end of the air supply chamber toward the first receiving chamber is an air inlet, and the projection area of the air inlet is located at Within the projected area of the transition port; the sum of the flow areas of all the air inlets is greater than or equal to 5 times the sum of the cross-sectional areas of all the mixing holes, and the sum of the flow areas of all the air inlets is Less than or equal to 10 times the sum of the cross-sectional areas of all the mixing holes.

In one embodiment, the first receiving chamber is used to receive primary air, the air supply chamber is used to receive primary air from the first receiving chamber, and the mixing hole is used to provide fuel to the air supply chamber. , the opening of one end of the air supply chamber toward the first receiving chamber of the receiving chamber is an air inlet, and the opening of one end of the first receiving chamber toward the air inlet is a transition port, along the first receiving chamber The projection of the arrangement direction of the cavity and the air supply cavity, the projection area of the air inlet is located in the projection area of the transition port; the number of the fire rows is multiple, and the multiple fire rows are arranged at intervals. Each of the fire rows and the combustion chamber is surrounded by an auxiliary chamber connected to the combustion chamber. The auxiliary chamber is used to receive secondary air. The minimum flow area of the auxiliary chamber is the first area. All the The sum of the flow areas of the air inlets is the second area, the second area ratio is the sum of the first area and the second area is the second area ratio, the volume of the primary air is the ratio of the volume of the primary air to the volume of the secondary air The sum is the primary air proportion, the second area proportion is greater than or equal to the difference between the primary air proportion and 5%, and the second area proportion is less than or equal to the sum of the primary air proportion and 5%.

In one embodiment, the proportion of primary air is 50% to 70%.

In one embodiment, the fire row includes:

An air collector, the first receiving cavity is formed in the air collector;

A fuel collector is at least partially located in the combustion chamber, the fuel collector and the combustion chamber are surrounded by the combustion chamber, the combustion collector is connected to the air collector, and the fuel collector forms There is a second receiving cavity; and

A communication device is connected to the fuel collector, the communication device is at least partially located in the second receiving chamber, and the air supply chamber and the mixing hole group are formed in the communication device.

In one embodiment, the number of the connectors is multiple, and the plurality of connectors are arranged at intervals along the length direction of the fire row, and the fuel collector has a surrounding wall surrounding the second receiving cavity. , the surrounding wall includes a first wall and a second wall arranged oppositely, the arrangement direction of the first wall and the second wall is intersecting with the length direction of the fire row, at least one of all the connectors The connector is a first connector, the first connector is connected to the first wall and is spaced apart from the second wall, and at least one of all the connectors is a second connector , the second connector is connected to the second wall and the first wall is spaced apart, the first connector and the second connector are alternately arranged along the length direction of the fire row, along the In the longitudinal direction projection of the fire row, the projection area of the first connector partially overlaps with the projection area of the second connector.

In one embodiment, the fuel collector includes:

A first mounting part is installed on the combustion chamber, the first mounting part penetrates the side wall of the combustion chamber, and the first mounting part forms a fuel input chamber that communicates with the second receiving chamber; and

A second mounting part is connected to the first mounting part, the second mounting part is located in the combustion chamber, and the second receiving cavity is formed in the second mounting part.

A second aspect of the embodiment of the present application provides a gas water heater, including:

Any of the above combustion devices;

A heat exchanger located at one end of the combustion chamber to receive the heat released in the combustion chamber to heat the water in the heat exchanger; and

A fan is used to provide power to the primary air so that the primary air flows to the combustion chamber.

In the combustion device of the embodiment of the present application, one of the first receiving chamber and the mixing hole is used to provide primary air to the air supply chamber, and the other of the first receiving chamber and the mixing hole is used to provide fuel to the air supply chamber. , fuel and primary air are mixed in the air supply chamber to form a fuel-air mixture, and the fuel-air mixture in the air supply chamber flows to the combustion chamber for combustion to form a flame. Since the lengths of the flow paths from two adjacent mixing hole groups to the corresponding air outlets are not equal along the length of the fire row, the uniformity of the fuel-air mixture corresponding to the two adjacent mixing hole groups will be different. This makes the natural frequencies of flames at adjacent positions along the length of the fire row different, reducing the possibility of resonance and thermoacoustic oscillation.

Description of drawings

Figure 1 is a schematic structural diagram of a combustion device according to an embodiment of the present application. In the figure, each fire row has multiple connectors, and each connector is provided with an air supply chamber;

Figure 2 is a schematic diagram of the structure shown in Figure 1 from another perspective;

Figure 3 is a schematic diagram of the bottom of the combustion device according to the embodiment of the present application. In the figure, each fire row has multiple connectors, and each connector is provided with an air supply chamber;

Figure 4 is a cross-sectional view at position A-A in Figure 3;

Figure 5 is an enlarged view of position C in Figure 4;

Figure 6 is an enlarged view of position B in Figure 3;

Figure 7 is a schematic structural diagram of the fire exhaust according to the embodiment of the present application. The top wall of the fire exhaust is not shown in the figure. In the figure, the fire exhaust has multiple connectors, and each connector is provided with an air supply cavity;

Figure 8 is a perspective view of the connector shown in Figure 5;

Figure 9 is a schematic structural diagram of an air collector according to an embodiment of the present application;

Figure 10 is a schematic structural diagram of a combustion device according to an embodiment of the present application. In the figure, each fire row is provided with a connector, and each connector is provided with an air supply chamber;

Figure 11 is a cross-sectional view at position D-D in Figure 10;

Figure 12 is a perspective view of the fire row structure shown in Figure 10, showing the top wall of the fire row;

Figure 13 is a perspective view of the fire row structure shown in Figure 10. The top wall of the fire row is not shown in the figure.

Explanation of reference signs: combustion chamber 1; fire exhaust 2; first receiving chamber 21; gas collection port 211; transition port 212; air supply chamber 22; air inlet 221; air outlet 222; mixing hole group 23; first mixing hole Material hole group 23a; second mixing hole group 23b; third mixing hole group 23c; fourth mixing hole group 23d; mixing hole 231; second receiving chamber 24; air collector 25; fuel collector 26; Surrounding wall 261; first wall 2611; second wall 2612; fourth wall 2613; top wall 2614; first mounting part 262; fuel input chamber 2621; second mounting part 263; connector 27; first connector 27a; The second communication device 27b; the cavity wall 271; the third wall 2711; the combustion chamber 3; the auxiliary chamber 4.

Detailed ways

It should be noted that, without conflict, the embodiments and the technical features in the embodiments can be combined with each other. The detailed description in the specific embodiments should be understood as an explanation of the purpose of the application and should not be regarded as Undue limitation on this application.

In the description of the embodiments of the present application, "upper", "lower", "top", "bottom", orientation or positional relationship are based on the orientation or positional relationship shown in Figure 4 and Figure 11. It should be understood that, These orientation terms are only used to facilitate the description of the present application and simplify the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present application. Please refer to Figure 4 and Figure 11. The up and down direction is the direction indicated by arrow R1 in the figure.

It should be noted that in the embodiment of the present application, the operator "*" refers to multiplication in mathematics.

As part of the creative concept of the present application, before describing the embodiments of the present application, it is necessary to analyze the reasons why the combustion device of the gas water heater generates thermoacoustic oscillation in related technologies. Through reasonable analysis, the technical solutions of the embodiments of the present application are obtained. .

In the related art, the natural frequencies of the flame formed during the combustion process of the combustion device of the gas water heater are relatively close. It should be noted that the natural frequency of the flame refers to the frequency at which the fuel-air mixture burns to form a flame and releases heat. Since the natural frequencies of the flame are relatively close, the flame may form resonance during the combustion process, resulting in thermoacoustic oscillation.

In view of this, embodiments of the present application provide a gas water heater, which includes a combustion device, a heat exchanger, and a fan. The combustion device burns the fuel and releases heat to heat the water in the heat exchanger. The fan is used to provide the air required for combustion into the combustion device.

The combustion device of the embodiment of the present application, please refer to Figures 1 to 4, Figure 10 and Figure 11, includes a combustion chamber 1 and a fire exhaust 2. The fire row 2 is at least partially located in the combustion chamber 1 , and the fire row 2 and the combustion chamber 1 form a combustion chamber 3 .

It should be noted that primary air refers to air that is premixed with fuel to form a fuel-air mixture. The fuel-air mixture flows through the fire row 2 to the combustion chamber 3 for combustion.

In one embodiment, please refer to Figures 1 to 4. The number of fire rows 2 is at least one. Each fire row 2 is formed with a first receiving cavity 21, an air supply cavity 22 and a mixing hole group 23. The air supply cavity 22 and the mixing hole group 23 are located between the first receiving chamber 21 and the combustion chamber 3. The air supply chamber 22 is connected to the first receiving chamber 21 and the combustion chamber 3 respectively. The mixing hole group 23 corresponding to each fire row 2 The number is multiple, and each mixing hole group 23 includes at least one mixing hole 231. The mixing hole 231 is connected with the air supply chamber 22. The opening at one end of the air supply chamber 22 facing the combustion chamber 3 is an air outlet 222. Along the fire In the length direction of row 2, the lengths of the flow paths from two adjacent mixing hole groups 23 to the corresponding air outlets 222 are not equal. In this structure, one of the first receiving chamber 21 and the mixing hole 231 is used to provide primary air to the air supply chamber 22 , and the other of the first receiving chamber 21 and the mixing hole 231 is used to provide primary air to the air supply chamber 22 Fuel is provided, and the fuel and primary air are mixed in the air supply chamber 22 to form a fuel-air mixture. The fuel-air mixture in the air supply chamber 22 flows to the combustion chamber 3 for combustion to form a flame. Since the lengths of the flow paths from two adjacent mixing hole groups 23 to the corresponding air outlets 222 are not equal along the length direction of the fire row 2, the uniformity of the fuel-air mixture corresponding to the two adjacent mixing hole groups 23 is not equal. There will be a difference, so that the natural frequencies of the flames at adjacent positions along the length direction of the fire row 2 are different, which reduces the possibility of resonance and thermoacoustic oscillation.

It should be noted that the natural frequency of the flame refers to the frequency at which the fuel-air mixture burns to form a flame and releases heat.

It should be noted that primary air refers to air that is premixed with fuel to form a fuel-air mixture, and the fuel-air mixture flows to the combustion chamber 3 for combustion.

It should be noted that the length of the flow path from the mixing hole group 23 to the corresponding air outlet 222 is the length of the flow path from the mixing hole 231 in the mixing hole group 23 to the corresponding air outlet 222 .

In one embodiment, please refer to FIGS. 8 and 11 , the lengths of the flow paths from all the mixing holes 231 in each mixing hole group 23 to the corresponding air outlet 222 are equal, and the lengths of the flow paths from each mixing hole group 23 to the air outlet 222 are equal. The length of the flow path is the length of the flow path from the corresponding mixing hole 231 to the corresponding air outlet 222. Such a structure makes the natural frequency of the flame within a certain range close to each other, which prevents the natural frequency of the flame from changing too frequently to a certain extent.

It can be understood that when the number of mixing holes 231 in each mixing hole group 23 is one, the length of the flow path from all the mixing holes 231 in each mixing hole group 23 to the corresponding air outlet 222 is this The length of the flow path from one mixing hole 231 to the corresponding air outlet 222 belongs to the situation where the distances from all the mixing holes 231 in each mixing hole group 23 to the corresponding air outlet 222 mentioned in the embodiment of this application are equal.

In one embodiment, among all the mixing holes 231 of each mixing hole group 23 , the length of the flow path from the mixing hole 231 to the corresponding air outlet 222 may be unequal, and the length of the flow path from each mixing hole group 23 to the air outlet 222 The length of the flow path is the average length of the flow path from all the mixing holes 231 in each mixing hole group 23 to the corresponding air outlet 222 .

It should be noted that the flow path is the path through which the airflow flows, and the flow path should be understood as the path through which the airflow flows macroscopically as a whole. For example, the air flow in the air supply chamber 22 flows to the combustion chamber 23, and the air flow flows to the combustion chamber 23 along the central axis of the air supply chamber 22 in a macroscopic view. The flow path of the air flow in the air supply chamber 22 is the air flow along the air supply chamber 22. The path of central axis flow. When the central axis of the air supply chamber 22 is a straight line, the length of the flow path from the mixing hole 231 to the corresponding air outlet 222 is the distance from the mixing hole 231 to the corresponding air outlet 222 .

It should be explained that the starting position of the flow path from the mixing hole 231 to the corresponding air outlet 222 is the position where the central axis of the mixing hole 231 intersects the central axis of the air supply chamber 22 .

It should be noted that the fuel-air mixture formed by the fuel and primary air entering the air supply chamber 22 through the mixing hole group 23 is mainly located between the mixing hole group 23 and the opening of one end of the air supply chamber 22 facing the combustion chamber 3 . The primary air located between the air inlet 221 and the mixing hole group 23 has not yet been mixed with the fuel. After this part of the primary air enters the air supply chamber 22 through the air inlet 221, the air supply chamber 22 rectifies this part of the primary air to a certain extent. The function makes this part of the primary air flow as close to parallel flow as possible as a whole, which can reduce the energy loss caused by the disordered disturbance of the air flow and help maintain a faster flow rate of the primary air.

In one embodiment, the first receiving chamber 21 can be used to receive primary air. The primary air in the first receiving chamber 21 flows to the air supply chamber 22 to provide primary air to the air supply chamber 22. The mixing holes of the mixing hole group 23 231 can be used to provide fuel to the air supply chamber 22, where the fuel and primary air are mixed to form a fuel-air mixture.

In one embodiment, the first receiving chamber 21 can be used to receive fuel. The fuel in the first receiving chamber 21 flows to the air supply chamber 22 to provide fuel to the air supply chamber 22. The mixing holes 231 of the mixing hole group 23 can be used. After providing primary air to the air supply chamber 22, fuel and primary air are mixed in the air supply chamber 22 to form a fuel-air mixture.

In one embodiment, the fuel may be natural gas.

In one embodiment, the fuel may be hydrogen or hydrogen-rich synthesis gas.

In one embodiment, please refer to FIG. 4 and FIG. 11 , the first receiving chamber 21 is located at one end of the air supply chamber 22 , and the combustion chamber 3 is located at the other end of the air supply chamber 22 .

In one embodiment, please refer to FIG. 4 and FIG. 11 , the first receiving chamber 21 is located at the lower end of the air supply chamber 22 , and the combustion chamber 3 is located at the upper end of the air supply chamber 22 .

In one embodiment, please refer to Figures 4 to 7, Figure 10 and Figure 11. The length direction of the fire row 2 is the direction indicated by the arrow R2 in the figure.

In one embodiment, the heat exchanger is located at one end of the combustion chamber 1 to receive the heat released in the combustion chamber 1 to heat the water in the heat exchanger.

In one embodiment, the heat exchanger is located above the combustion chamber 1 .

In one embodiment, the fan is used to provide power to the primary air so that the primary air flows to the combustion chamber 3, thereby providing the combustion chamber 3 with air required for combustion.

In one embodiment, the fan may be an induced draft fan capable of forming negative pressure. The induced draft fan is located downstream of the fire exhaust 2 , and the primary air is sucked into the combustion chamber 3 through the first receiving chamber 21 and the air supply chamber 22 .

In one embodiment, the fan may be a blower capable of forming positive pressure. The blower is located upstream of the fire exhaust 2 , and the primary air is blown into the combustion chamber 3 through the first receiving chamber 21 and the air supply chamber 22 .

In one embodiment, the number of fire rows 2 can be selected according to actual needs, and the number of fire rows 2 is at least one. For example, the number of fire rows 2 can be one, two, five, seven or eight, etc.

In one embodiment, please refer to Figures 4 and 5. Among the two adjacent mixing hole groups 23 along the length direction of the fire row 2, one of the mixing hole groups 23 is the first mixing hole group 23a, and the other one is the first mixing hole group 23a. The mixing hole group 23 is the second mixing hole group 23b. The length of the flow path from the first mixing hole group 23a to the corresponding air outlet 222 and the length of the flow path from the second mixing hole group 23b to the corresponding air outlet 222 are not the same. Equally, the first mixing hole group 23 a and the second mixing hole group 23 b are alternately arranged along the length direction of the fire row 2 . In such a structure, the lengths of the flow paths from the mixing hole group 23 to the corresponding air outlet 222 are alternately arranged with long and short lengths. On the one hand, the natural frequencies of adjacent flames are different, which reduces the possibility of thermoacoustic oscillation and reduces combustion. On the other hand, in the shorter flow path, the primary air and fuel do not have enough time to mix evenly, and the fuel concentration in some locations is higher, which is conducive to the stable combustion of the flame. The combustion of the fuel-air mixture corresponding to the shorter flow path is relatively Stable duty flame, the longer flow path allows the fuel and primary air to be mixed evenly, and the fuel can be burned as fully as possible, so that the fuel is diluted after the mixture is evenly mixed. The higher primary air content and the faster flow rate of the fuel-air mixture may cause When the flame is extinguished, the first mixing hole group 23a and the second mixing hole group 23b are alternately arranged. Even if part of the flame burns unstable and goes out, the duty flame can ignite the fuel-air mixture at the extinguished position again.

In one embodiment, please refer to FIG. 5 , the length of the flow path from the mixing hole 231 in the first mixing hole group 23a to the corresponding air outlet 222 is D1. The length of the flow path from the mixing hole 231 in the second mixing hole group 23b to the corresponding air outlet 222 is D2. D1 and D2 are not equal, where D2>D1.

In one embodiment, the length of the flow path from all the mixing holes 231 in each first mixing hole group 23a to the corresponding air outlet 222 is equal.

In one embodiment, the lengths of the flow paths from all the mixing holes 231 in each second mixing hole group 23b to the corresponding air outlet 222 are equal.

In one embodiment, please refer to FIG. 8 , which shows the arrangement of the mixing holes 231 of the mixing hole group 23 on the connector 27 .

In one embodiment, please refer to FIGS. 1 to 7 , the number of air supply chambers 22 corresponding to each fire row 2 is multiple.

In one embodiment, please refer to FIGS. 3 to 7 , a plurality of air supply chambers 22 are arranged at intervals along the length direction of the fire row 2 , and each air supply chamber 22 corresponds to a mixing hole group 23 . With this structure, each air supply chamber 22 forms independent flames. The numerous independent flames make the temperature distribution in the combustion chamber 1 more uniform, reduce local high temperatures, and extend the life of the heated components. By way of example, the life of the heated heat exchanger can be extended.

In one embodiment, please refer to Figures 4 and 5. When multiple air supply chambers 22 are arranged at intervals along the length direction of the fire row 2, each air supply chamber 22 corresponds to a mixing hole group 23. The first mixing hole group 23a and the second mixing hole group 23b are arranged alternately. In this way, multiple duty flames arranged at intervals can be formed. When the flame formed by the combustion of the fuel-air mixture in the air supply chamber 22 on both sides of the duty flame is extinguished in the combustion chamber, the duty flame can ignite the fuel-air mixture on both sides again.

In one embodiment, please refer to Figures 10 to 13. Along the length direction of the fire row 2, the length of the flow path from the mixing hole group 23 to the corresponding air outlet 222 changes periodically. The length of the flow path of 222 first increases and then decreases or first decreases and then increases within a cycle. With such a structure, the natural frequency of the flame may change more in one cycle, which can better reduce the possibility of resonance and thermoacoustic oscillation. Furthermore, the length of the flow path from the mixing hole group 23 to the air outlet 222 first increases and then decreases or first decreases and then increases within a cycle, so that the length of the flow path from the mixing hole group 23 to the air outlet 222 is It does not always increase or decrease, and the length of the flow path from the mixing hole group 23 to the air outlet 222 can be kept within a more appropriate range while periodically changing.

In one embodiment, please refer to FIGS. 10 to 13 , the length direction of the air supply cavity 22 is arranged along the length direction of the fire row 22 . Along the length direction of the fire row 2, the length of the flow path from the mixing hole group 23 to the corresponding air outlet 222 changes periodically. The length of the flow path from the mixing hole group 23 to the corresponding air outlet 222 first increases in one cycle. Then decrease or first decrease and then increase.

In one embodiment, please refer to Figures 10 to 13, the number of air supply chambers may be one.

In one embodiment, please refer to FIGS. 10 to 13 . When the number of air supply chambers is one, the length direction of the air supply chamber 22 is arranged along the length direction of the fire row 22 . Along the length direction of the fire row 2, the length of the flow path from the mixing hole group 23 to the corresponding air outlet 222 changes periodically. The length of the flow path from the mixing hole group 23 to the corresponding air outlet 222 first increases in one cycle. Then decrease or first decrease and then increase.

It can be understood that along the length direction of the fire row 2 , the length of the flow path from the mixing hole group 23 to the corresponding air outlet 222 changes periodically, which can be applicable to the situation of multiple air supply chambers 22 .

In one embodiment, the first receiving chamber 21 is used to receive primary air, and the mixing hole 231 is used to provide fuel to the air supply chamber 22 . In this way, the primary air received by the first receiving chamber 21 flows to the air supply chamber 22 to provide primary air to the air supply chamber 22, and the fuel flows to the air supply chamber 22 through the mixing hole 231. The primary air and fuel are mixed in the air supply chamber 22 to form fuel-air mixture.

In one embodiment, please refer to Figures 10 to 13. The number of air supply chambers 22 corresponding to each fire row 2 is at least one, and mixing hole groups 23 are provided on opposite sides of each air supply chamber 22. The mixing holes 231 of the side mixing hole group 23 are relatively arranged, and the direction in which the mixing holes 231 on both sides are relatively arranged intersects with the length direction of the fire row 2 . With such a structure, when the mixing hole 231 is used to provide fuel to the air supply chamber 23, the oppositely arranged mixing holes 231 enable the two streams of fuel to be supplied through the mixing hole 231 when the fuel flow rate is larger and the flow rate is faster. The collision in the cavity 22 reduces the possibility that the fuel is sprayed into the air supply cavity 231 through the mixing hole 231 and adheres to the inner wall of the air supply cavity 231, which can prevent the flame from adhering to the inner wall of the air supply cavity 231 to a certain extent. The fuel spreads into the air supply chamber 22, reducing the risk of backfire. Furthermore, when the fuel flow rate flowing through the mixing holes 231 of the mixing hole group 23 is larger and the flow speed is faster, the fuel flowing through the mixing holes 231 symmetrically arranged on both sides collide with each other, so that the fuel and primary air are fully mixed. The fuel and primary air are mixed evenly, and the flame temperature formed by the combustion of the fuel-air mixture formed by the mixing of the fuel and primary air is relatively uniform, which can reduce thermal nitrogen oxides generated due to local high temperatures.

In one embodiment, please refer to Figures 11 to 13, the mixing holes 231 of the mixing hole groups 23 on both sides are arranged symmetrically. In this way, the momentum of the two fuel streams colliding through the mixing holes 231 on both sides is relatively close, which is conducive to the collision of the two fuel streams near the symmetry center, reducing the possibility of the fuel adhering to the inner wall of the air supply chamber 22 and reducing backfire. risk.

In one embodiment, please refer to FIGS. 10 to 13 , the arrangement direction of the mixing holes 231 of the mixing hole groups 23 on both sides is the first direction.

In one embodiment, please refer to FIGS. 10 to 13 . The first direction is the direction indicated by arrow R3 in the figures.

In one embodiment, when the mixing holes 231 of the mixing hole groups 23 on both sides are arranged oppositely, the number of the air supply chambers 22 may also be multiple, and the arrangement direction of the plurality of air supply chambers 22 is arranged crosswise with the first direction.

In one embodiment, the arrangement direction of the plurality of air supply cavities 22 is perpendicular to the first direction.

In one embodiment, please refer to FIGS. 10 to 13 . There are multiple mixing hole groups 23 on each side, and the multiple mixing hole groups 23 on each side are arranged along the length direction of the fire row 2 .

In one embodiment, the length direction of the fire row 2 is perpendicular to the first direction.

In one embodiment, please refer to Figures 10 to 13. The lengths of the flow paths from all the mixing holes 231 in each mixing hole group 23 to the corresponding air outlet 222 are equal, and the lengths of the flow paths from each mixing hole group 23 to the air outlet 222 are equal. The length of the flow path is the length of the flow path from the corresponding mixing hole 231 to the corresponding air outlet 222. Along the length direction of the fire row 2, among all the mixing hole groups 23 corresponding to each fire row 2, the mixing hole group 23 located at one end of the air supply chamber 22 is the third mixing hole group 23c. The third mixing hole The length of the flow path from the group 23c to the corresponding air outlet 222 is the third distance. The mixing hole group 23 located at the other end of the air supply chamber 22 is the fourth mixing hole group 23d. The fourth mixing hole group 23d reaches the corresponding outlet. The length of the flow path of the air port 222 is the fourth distance. The remaining mixing hole groups 23 are located between the third mixing hole group 23c and the fourth mixing hole group 23d. The remaining mixing hole groups 23 reach the corresponding air outlet 222. The length of the flow path is greater than or equal to the greater of the third distance and the fourth distance. In this structure, the fuel entering the air supply chamber 22 through the mixing holes 231 of the third mixing hole group 23c and the mixing holes 231 of the fourth mixing hole group 23d is mixed with the primary air in the air supply chamber 22 to form fuel air. Mixture, since the length of the flow path from the third mixing hole group 23c and the fourth mixing hole group 23d to the corresponding air outlet 222 is short, the local fuel concentration in the fuel-air mixture is relatively large, and can be discharged along the fire in the air supply chamber 22 A relatively stable duty flame is formed at both ends of the length direction of the fire row 2. Even if the size of the air supply chamber 22 along the length direction of the fire row 2 is longer, the duty flames at both ends of the air supply chamber 22 along the length direction of the fire row 2 can gradually move toward The fuel-air mixture is ignited at the middle position of the air supply chamber 22 along the length direction of the fire row 2, thereby ensuring as much as possible that the flame in the entire air outlet 222 of the air supply chamber 22 does not go out or is quickly re-ignited after being extinguished.

In one embodiment, the number of mixing holes 231 in each mixing hole group 23 may be one or more. For example, referring to FIG. 11 , the number of mixing holes 231 in each mixing hole group 23 is two. In other embodiments, the number of mixing holes 231 in each mixing hole group 23 may be three, six or more.

It can be understood that the length of the flow path from the remaining mixing hole groups 23 to the corresponding air outlet 222 is greater than or equal to the larger of the third distance and the fourth distance, which means that when the third distance is greater than the fourth distance, the remaining The length of the flow path from the mixing hole group 23 to the corresponding air outlet 222 is greater than or equal to the third distance. When the fourth distance is greater than the third distance, the length of the flow path from the remaining mixing hole groups 23 to the corresponding air outlet 222 is greater than or equal to Fourth distance.

In one embodiment, the third distance may be equal to the fourth distance. In this way, both the third mixing hole group 23c and the fourth mixing hole group 23d can be as close as possible to the corresponding air outlet 222, so that the two ends of the air supply cavity 22 along the length direction of the fire row 2 can form a stable structure with approximately the same degree. of duty flame.

It should be noted that when the third distance may be equal to the fourth distance, and the distances from the remaining mixing hole groups 23 to the corresponding air outlets 222 are greater than or equal to the larger of the third distance and the fourth distance, it should be understood that the remaining mixing holes are The distance between the material hole group 23 and the corresponding air outlet 222 is greater than or equal to any one of the third distance and the fourth distance.

In one embodiment, the opening at one end of the first receiving chamber 21 away from the air supply chamber 22 is an air collection port 211, and the opening at one end of the air supply chamber 22 facing the first receiving chamber 21 is an air inlet 221. All the passages of the air collection port 211 are The sum of the flow areas is greater than the sum of the flow areas of all air inlets 221 . With such a structure, on the one hand, when the primary air flows to the air supply chamber 22 through the air collection port 211 and the air inlet 221 to mix with the fuel, the sum of the flow areas of all the air collection ports 211 is greater than the flow area of all the air inlets 221 As a result, the primary air flows from the air collection port 211 through the air inlet 221 to the air supply chamber 22 at a faster speed. The faster primary air is mixed with the fuel in the air supply chamber 22 to form a fuel-air mixture with a faster speed. , which alleviates the backfire phenomenon caused by the low flow rate of the fuel-air mixture. On the other hand, the primary air enters the air supply chamber 22 through the first receiving chamber 21, and the fuel mixing hole 231 enters the air supply chamber 22. The mixing hole group 23 is located between the combustion chamber 3 and the first receiving chamber 21, and the fuel and primary air enter the air supply chamber 22. The air enters the fire exhaust 2 through different channels and is mixed in the air supply chamber 22. Compared with the fuel and primary air entering the fire exhaust 2 together, the path for the fuel-air mixture to flow to the combustion chamber 3 is shorter, which alleviates the fuel in the longer combustion chamber 2. The backfire phenomenon caused by adhering to the wall of the air supply chamber 22 during the long path flow. Therefore, the combustion device of the embodiment of the present application can better alleviate the backfire phenomenon of fuel burning in the combustion device and reduce the risk of backfire.

It can be understood that the flow area is the area of the flow section.

It can be understood that when the number of air collection ports 211 is one, the sum of the flow areas of all the air collection ports 211 is the flow area of this one air collection port 211 .

It can be understood that when the number of air inlets 221 is one, the sum of the flow areas of all the air inlets 221 is the flow area of this one air inlet 221 .

In one embodiment, please refer to FIG. 4 . The flow area of the air collecting port 211 is the area surrounded by the air collecting port 211 on the plane where the air collecting port 211 is located.

In one embodiment, the flow area of the air inlet 221 is the area of the area surrounded by the air inlet 221 on the plane where the air inlet 221 is located.

In one embodiment, please refer to Figures 4, 5, 11 and 13. Each fire row 2 is also formed with a second receiving cavity 24, and the mixing hole 231 is connected to the second receiving cavity 24 and the air supply cavity 22 respectively. , the first receiving chamber 21 is used to receive primary air, the air supply chamber 22 is used to receive the primary air in the first receiving chamber 21 and is used to receive the fuel in the second receiving chamber 24 through the mixing hole 231.

In one embodiment, please refer to Figures 4, 5 and 11, the second receiving chamber 24 is located between the first receiving chamber 21 and the combustion chamber 3, and the air supply chamber 22 is at least partially located in the second receiving chamber 24.

In one embodiment, please refer to FIGS. 4 and 5 , the air supply cavity 22 passes through the second receiving cavity 24 .

In one embodiment, please refer to Figures 4, 5, and Figures 11 to 13, the mixing hole group 23 is located in the second receiving cavity 24.

In one embodiment, please refer to Figures 4, 5, 8, and Figures 10 to 13. The air supply chamber 22 has a columnar structure.

In one embodiment, the air supply chamber 22 has a columnar structure, and the flow cross section is a cross section perpendicular to the axial direction of the air supply chamber 22 .

In one embodiment, please refer to Figures 4, 5, 8, and Figures 10 to 13. The air supply chamber 22 is a columnar structure with a rectangular flow cross section, that is, the air supply chamber 22 is in the shape of a rectangular parallelepiped.

In one embodiment, please refer to Figures 4, 5, 8, and Figures 10 to 13. The air supply chamber 22 is a columnar structure with a rectangular flow cross section, and the flow area of the air inlet 221 is a rectangular area.

In one embodiment, the flow cross section of the air supply chamber 22 is not limited to a rectangular shape, and may also be a rectangular, rhombus, circular or hexagonal shape.

In one embodiment, please refer to FIG. 5 and FIGS. 11 to 13 . The axial direction of the mixing holes 231 of the mixing hole group 23 is perpendicular to the axial direction of the air supply chamber 22 .

In one embodiment, please refer to FIGS. 4 , 9 and 11 . Along the direction in which the first receiving cavity 21 points to the air supply cavity 22 , the flow area of the first receiving cavity 21 gradually decreases.

In one embodiment, please refer to FIG. 4 , FIG. 9 and FIG. 11 , the direction in which the first receiving cavity 21 points to the air supply cavity 22 is from bottom to top.

In one embodiment, the flow cross section of the air supply chamber 22 is a target cross section.

It should be noted that the flow cross section refers to the flow cross section. The flow area is the area of the flow cross section.

In one embodiment, please refer to FIGS. 7 and 8 , the air supply chamber 22 has characteristic dimensions.

In one embodiment, the characteristic dimension may be the hydraulic diameter of the air supply chamber 22 .

It should be explained that the hydraulic diameter is 4 times the ratio of the flow area to the circumference. Specifically, the hydraulic diameter of the air supply chamber 22 is four times the ratio of the flow area of the air supply chamber 22 to the circumference of the flow cross section of the air supply chamber 22 .

It should be noted that the hydraulic diameter is roughly equivalent to the characteristic size. Especially when the flow cross-section shape of the air supply chamber 22 is irregular, the characteristic size is difficult to clearly define, and the hydraulic diameter can be used as the characteristic size.

In one embodiment, when the flow cross section of the air supply chamber 22 is the target cross section, the characteristic size is the minimum span on the target cross section through the geometric center of the target cross section.

In one embodiment, please refer to Figures 7 and 8. The target section is in the shape of a long strip. The two oppositely arranged long sides of the target section are parallel. The minimum span on the target section through the geometric center of the target section is the two sides of the target section. The distance between the long sides of oppositely arranged strips.

In one embodiment, please refer to FIG. 7 and FIG. 8 . The strip may be a rectangle, and the minimum span on the target section through the geometric center of the target section is equal to the width of the rectangle.

In one embodiment, the long strip may be waist-shaped, and the minimum span on the target section through the geometric center of the target section is the distance between two oppositely arranged long sides of the target section.

In one embodiment, the target section may be in the shape of an ellipse, and the minimum span on the target section through the geometric center of the target section is equal to the length of the minor axis of the ellipse.

It can be understood that the shape of the target cross section is not limited to the above shape and can be selected according to actual needs.

In one embodiment, please refer to Figures 5, 8 and 11. The length of the flow path from the mixing hole 231 to the corresponding air outlet 222 is greater than or equal to the characteristic size. The length of the flow path from the mixing hole 231 to the corresponding air outlet 222 Less than or equal to ten times the feature size. With such a structure, the length of the flow path from the mixing hole 231 to the air outlet 222 is more appropriate. On the one hand, it can alleviate the problem of insufficient fuel combustion due to the short mixing distance of the fuel-air mixture and the uneven mixing of the fuel-air mixture. On the one hand, it can alleviate the long mixing distance of the fuel-air mixture. During the long-distance flow of the fuel-air mixture to the combustion chamber 3, the fuel (such as hydrogen) adheres to the wall of the air supply chamber 22, and backfire may occur. question.

In one embodiment, please refer to Figures 7 and 8. The characteristic size shown in the figures is L. The distance from the geometric center of the mixing hole 231 to the corresponding air outlet 222 is greater than or equal to L. The geometric center of the mixing hole 231 is to the corresponding air outlet 222. The distance between the air outlets 222 is less than or equal to 10L. For example, the distance from the geometric center of the mixing hole 231 to the corresponding air outlet 222 may be L, 2L, 3L, 5.5L, 6.5L, 8L or 10L.

In one embodiment, the distance from the geometric center of the mixing hole 231 to the corresponding air outlet 222 can also be set to be less than the characteristic size or greater than ten times the characteristic size according to actual needs.

In one embodiment, please refer to FIG. 5 , a corresponding mixing hole group 23 is provided between each air supply chamber 22 and the second receiving chamber 24 .

In one embodiment, please refer to Figures 3, 4 and 6. Along the direction in which the first receiving cavity 21 points to the air supply cavity 22, the flow area of the first receiving cavity 21 gradually decreases, and the first receiving cavity 21 faces the air supply cavity 22. The opening at one end of the air chamber 22 is a transition port 212, which is projected along the arrangement direction of the first receiving chamber 21 and the air supply chamber 22. The projection area of the air inlet 221 is located within the projection area of the transition port 212. With this structure, since the flow area of the first receiving cavity 21 gradually decreases in the direction in which the first receiving cavity 21 points to the air supply cavity 22 , the flow area of the first receiving cavity 21 is smallest at the transition port 212 . Since the projected area of the air inlet 221 is located within the projected area of the transition port 212 , the sum of the flow areas of all the air inlets 221 is smaller than the flow area of the first receiving chamber 21 at the transition port 212 , entering the air supply chamber 22 The flow rate of the primary air is greatly affected by the air inlet 221. By setting the relationship between the flow area of the air inlet 221 and the cross-sectional area of the mixing hole 231, the degree of uniform mixing of the fuel and the primary air can be adjusted. The proportion of primary air can also be adjusted by setting the flow area of the air inlet 221 .

In one embodiment, the sum of the flow areas of all the air inlets 221 is greater than or equal to 5 times the sum of the cross-sectional areas of all the mixing holes 231 , and the sum of the flow areas of all the air inlets 221 is less than or equal to the sum of the cross-sectional areas of all the mixing holes 231 . 10 times the sum of the cross-sectional areas of holes 231. With this structure, the momentum of the primary air entering the air supply chamber 22 through the air inlet 211 and the momentum of the fuel entering the air supply chamber 22 through the mixing hole 231 are more appropriate. The fuel entering the air supply chamber 22 through the mixing hole 231 can The air is blown as far as possible to the central axis of the air supply chamber 22 to mix with the primary air, so that the fuel-air mixture in the air supply chamber 22 can be mixed evenly and fully. Furthermore, when the primary air is sufficient, the relationship between the flow area of the air inlet 221 and the flow area of the mixing hole 231 is such that the primary air entering the air supply chamber 22 through the air inlet 221 is different from the flow area through the mixing hole. 231 In the fuel-air mixture formed by the fuel entering the air supply chamber 22, the content of primary air is relatively large. The fuel-air mixture flows into the combustion chamber 3 for combustion in a lean combustion state. The length of the flame formed by combustion is short, which can reduce the combustion accordingly. The height of the side wall of chamber 1 reduces the space occupied by the combustion device and reduces costs. The fuel-air mixture is in a lean combustion state, and the bottom of the formed flame will be lifted a certain distance away from the air outlet 222 to prevent the flame from burning close to the fire row 2 at the air outlet 222 of the air supply chamber 22 and causing the local temperature of the fire row 2 to be too high.

In one embodiment, the sum of the flow areas of all the air inlets is S1, the sum of the cross-sectional areas of all the mixing holes 231 is S2, and 5*S2≤S1≤10*S2.

In one embodiment, please refer to Figures 4 and 11. There are multiple fire rows 2. The multiple fire rows 2 are arranged at intervals. The multiple fire rows 2 and the combustion chamber 1 are surrounded by an auxiliary chamber connected to the combustion chamber 3. 4. The auxiliary chamber 4 is used to receive secondary air. With such a structure, the secondary air enters the combustion chamber 3 through the auxiliary chamber 4. On the one hand, it can re-ignite the fuel that has not been fully burned. On the other hand, the flowing secondary air can cause damage to the side walls of the combustion chamber 1 and the fire. The exhaust 2 is cooled at the position of the air outlet 222 to prevent the temperature of the combustion chamber 1 and the exhaust 2 from being too high.

It should be noted that the secondary air refers to the air that flows into the combustion chamber 3 without being premixed with fuel.

In one embodiment, please refer to Figures 4 and 6. The minimum flow area of the auxiliary cavity 4 is the first area, the sum of the flow areas of all the air inlets 221 is the second area, and the second area is larger than the first area. The sum of the second areas is the second area ratio. The volume ratio of the primary air to the volume of the secondary air is the sum of the primary air ratio. The second area ratio is greater than or equal to the primary air ratio and 5%. The difference is that the second area proportion is less than or equal to the sum of the primary air proportion and 5%. Such a structural form clarifies the relationship between the first area and the second area and the proportion of primary air. By setting the first area and the second area, the proportion of primary air can be controlled.

In one embodiment, the first area is S3, the second area is S4, the volume of primary air is V1, the volume of secondary air is V2, V1/V1+V2-5%≤S2/S1+S2≤V1/V1 +V2+5%.

In one embodiment, the fan is also used to provide power to the secondary air so that the secondary air flows to the combustion chamber 3 through the auxiliary chamber 4 , thereby realizing the fan providing secondary air to the combustion chamber 3 .

In one embodiment, the proportion of primary air is 50% to 70%. In this way, through the setting of the first area and the second area, the proportion of primary air is 50% to 70%, so that the amount of primary air received by the first receiving chamber 21 is sufficient, which is beneficial to the fuel-air mixture in the combustion chamber. 3 is in a lean combustion state.

In one embodiment, when the proportion of primary air is 50% to 70%, the proportion of secondary air is 30% to 50%.

In one embodiment, the minimum flow cross-section of the auxiliary cavity 4 is located on the plane where the gas collecting port 211 is located, and the minimum flow cross-section of the auxiliary cavity 4 is the area of the minimum flow cross-section of the auxiliary cavity 4 . With such a structure, since the flow area of the first receiving cavity 21 gradually decreases in the direction from the first receiving cavity 21 to the air supply cavity 22 , the flow area of the first receiving cavity 21 is the largest at the air collection port 211 , and the auxiliary cavity 4 The minimum flow cross section is located on the plane where the gas collection port 211 is located, so that the gap between adjacent fire rows 2 on the plane where the gas collection port 211 is located is small, the gap between the fire row 2 and the side wall of the combustion chamber 1 is small, and the gas collection port 211 The outer contour of the fire row 2 can be made relatively large on the plane where it is located, so as to form an air collection port 211 with a larger flow area on the fire row 2 . The minimum flow cross-section of the auxiliary cavity 4 is located on the plane where the gas collection port 211 is located. The flow area of the auxiliary cavity 4 on the side of the gas collection port 211 facing the combustion chamber 3 is greater than the minimum flow area of the auxiliary cavity 4. The corresponding flow cross-section is on the plane where the gas collection port 211 faces the combustion chamber 3. The gap between adjacent fire rows 2 is large, the gap between the fire row 2 and the side wall of the combustion chamber 1 is large, and the outer contour of the fire row 2 is correspondingly reduced. The outer contour of the fire exhaust 2 is larger on the side facing the gas collection port 211 and smaller on the side facing the combustion chamber 3, which can not only adapt to changes in the flow area of the first receiving chamber 21, but also save materials and reduce costs. .

In one embodiment, please refer to FIG. 4 and FIG. 11 . The plane where the gas collection port 211 is located is the plane P1 indicated by the dotted line in the figure.

In one embodiment, please refer to Figures 3, 4 and 6. The minimum flow cross-section of the auxiliary cavity 4 is the cross-section P2 indicated by the parallel oblique lines in the figure. It should be noted that, for clarity of illustration, only a part of the cross-section P2 is shown in the figure, and the entire cross-section P2 is not shown.

In one embodiment, please refer to FIGS. 4 , 5 , 7 , and 111 to 13 . The fire exhaust 2 includes an air collector 25 , a fuel collector 26 and a connector 27 . The first receiving cavity 21 is formed in the air collector 25 . The fuel collector 26 is at least partially located in the combustion chamber 1 . The fuel collector 26 and the combustion chamber 1 form a combustion chamber 3 . The combustion collector is connected to the air collector 25 . The fuel collector 26 forms a second receiving cavity 24 . The connector 27 is connected to the fuel collector 26 and is at least partially located in the second receiving chamber 24 . The air supply chamber 22 and the mixing hole group 23 are formed in the connector 27 . In this structure, the primary air is collected into the air supply chamber 22 of the connector 27 through the air collector 25, and the fuel in the second receiving chamber 24 of the fuel collector 26 enters the communication through the mixing hole group 23 on the connector 27. The primary air in the air supply chamber 22 of the device 27 is mixed with the primary air in the air supply chamber 22 to form a fuel-air mixture. The fuel-air mixture flows out of the connector 27 through the air outlet 222 of the air supply chamber 22 and enters the combustion chamber 3 surrounded by the fuel collector 26 and the combustion chamber 1 for combustion. The air collector 25, the fuel collector 26 and the connector 27 realize the rational arrangement of the first receiving chamber 21, the second receiving chamber 24, the air supply chamber 22 and the mixing hole group 23 on the corresponding devices. The fuel collector 26 is used to centralize the air supply and distribute the fuel to the corresponding air supply chambers 22 through the mixing holes 231 .

In one embodiment, please refer to FIG. 4 , FIG. 5 and FIG. 11 , the air collector 25 , the fuel collector 26 and the combustion chamber 1 are surrounded by an auxiliary chamber 4 .

In one embodiment, please refer to FIG. 4 and FIG. 11 , the air collector 25 is located in the combustion chamber 1 .

In one embodiment, please refer to FIG. 4 and FIG. 11 , the air collector 25 is located on the side of the fuel collector 26 away from the combustion chamber 3 .

In one embodiment, please refer to FIG. 4 and FIG. 11 , the combustion chamber 3 is located above the fuel collector 26 , and the air collector 25 is located below the fuel collector 26 .

In one embodiment, please refer to FIGS. 4 and 5 , the connector 27 penetrates the fuel collector 26 .

In one embodiment, the air collector 25 may be detachably connected, welded, or integrally formed with the fuel collector 26 .

In one embodiment, the connector 27 may be detachably connected, welded, or integrally formed with the fuel collector 26 .

In one embodiment, please refer to FIGS. 1 to 7 , the number of connectors 27 in each fire row 2 may be multiple.

In one embodiment, please refer to FIGS. 10 to 13 , the number of connectors 27 of each fire row 2 may be one.

In one embodiment, please refer to FIG. 7 . The top wall 2614 of the fuel collector 26 is not shown in the figure. A plurality of connectors 27 are arranged at intervals along the length direction of the fire row 2 . The fuel collector 26 has a second receiving chamber surrounding it. The surrounding wall 261 of the cavity 24 includes a first wall 2611 and a second wall 2612 arranged oppositely. The arrangement direction of the first wall 2611 and the second wall 2612 is intersecting with the length direction of the fire row 2. All connectors 27 At least one of the connectors 27 is the first connector 27a. The first connector 27a is connected to the first wall 2611 and is spaced apart from the second wall 2612. At least one of the connectors 27 is the second connector 27b. The second connector 27b is connected to the second wall 2612 and the first wall 2611 is spaced apart. The first connector 27a and the second connector 27b are alternately arranged along the length direction of the fire row 2. Projected along the length direction of the fire row 2, The projection area of one connector 27a partially overlaps the projection area of the second connector 27b. With such a structure, the fuel in the second receiving chamber 24 can bypass between the first communication device 27a and the second communication device 27b, and the fuel can pass through almost all other parts of the first communication device 27a except for the connection with the first wall 2611. , it is beneficial for the fuel to enter the air supply chamber 22 of the first connector 27a through the mixing hole 231 on the first connector 27a, and the fuel can almost pass through other parts of the second connector 27b except for the connection with the second wall 2612. It is advantageous for fuel to enter the air supply chamber 22 of the second communication device 27b through the mixing hole 231 on the second communication device 27b.

It can be understood that, please refer to FIG. 7 , when the fuel bypasses the position of the mixing hole 231 between the first communication device 27 a and the second communication device 27 b, part of the fuel passes through the mixing hole 231 to the corresponding air supply chamber 22 . , part of the fuel continues to bypass between the first connector 27a and the second connector 27b.

In one embodiment, when projected along the length direction of the fire row 2, the area where the projection area of the first connector 27a overlaps the projection area of the second connector 27b is the reference area.

In one embodiment, the projection area of at least part of the mixing holes 231 corresponding to the first connector 27a and/or the second connector 27b is located in the reference area. With such a structure, when the fuel circulates between the first communication device 27a and the second communication device 27b, it will inevitably pass through the position of the mixing hole 231 and then flow to the next first communication device 27a and the second communication device 27b. the gap between. It is advantageous for fuel to enter the first communication device 27a or the second communication device 27b through the corresponding mixing hole 231.

In one embodiment, please refer to Figure 13. The top wall 2614 of the fuel collector 26 is not shown in the figure. The connector 27 has a cavity wall 271 surrounding the air supply cavity 22. The cavity wall 271 includes a third wall 2711 for supplying air. Third walls 2711 are provided on opposite sides of the air chamber 22 . A mixing hole group 23 is formed on the third wall 2711 on each side. The mixing holes 231 of the mixing hole groups 23 on both sides are arranged oppositely.

In one embodiment, please refer to FIG. 13 , the top wall 2614 of the fuel collector 26 is not shown in the figure. The fuel collector 26 has a surrounding wall 261 surrounding the second receiving cavity 24 , and the surrounding wall 261 includes a fourth wall 2613 . , fourth walls 2613 are provided on opposite sides of the air supply cavity 22, third walls 2711 on both sides are located between the fourth walls 2613 on both sides, and the second receiving cavity 24 is at least partially located between the third wall 2711 on each side and the corresponding Between the fourth wall 2613. In this structural form, mixing hole groups 23 are respectively provided on the third walls 2711 on both sides. The second receiving cavity 24 is at least partially located between the third wall 2711 on each side and the corresponding fourth wall 2613. In the second receiving cavity 24 The fuel enters the air supply chamber 22 of the communication device 27 through the mixing hole 231 on the third wall 2711, is mixed with the primary air to form a fuel-air mixture, and enters the combustion chamber 3 for combustion. The mixing hole groups 23 on both sides are arranged oppositely. When the flow rate and flow rate of the fuel are large, the two streams of fuel entering the air supply chamber 22 from the symmetrically arranged mixing holes 231 collide, so that the fuel and primary air are mixed evenly. (For example, hydrogen gas) will not impact and adhere to the wall surface of the third wall 2711 of the communication device 27 , thereby mitigating the risk of backfire.

In one embodiment, please refer to FIG. 4 and FIG. 11 , the fuel collector 26 includes a first mounting part 262 and a second mounting part 263 . The first mounting part 262 is installed on the combustion chamber 1 . The first mounting part 262 penetrates the side wall of the combustion chamber 1 . The first mounting part 262 forms a fuel input chamber 2621 that communicates with the second receiving chamber 24 . The second mounting part 263 is connected to the first mounting part 262 and is located in the combustion chamber 1 . The second receiving cavity 24 is formed in the second mounting part 263 . In this structure, the fuel collector 26 is installed in the combustion chamber 1 through the first installation part 262 . The first mounting portion 262 penetrates the side wall of the combustion chamber 1 so that the first mounting portion 262 can partially extend outside the combustion chamber 1, which is beneficial to the fuel input chamber 2621 of the first mounting portion 262 from the outside of the combustion chamber 1 to the fuel input chamber 262. Fuel is provided in the second receiving cavity 24 of the second mounting part 263, and the method of providing fuel is safer.

The various embodiments/implementations provided in this application can be combined with each other without conflict.

The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included in the protection scope of this application.

Claims (16)

1. A combustion device including:

   combustion chamber; and

   The fire row is at least partially located in the combustion chamber. The fire row and the combustion chamber are surrounded by a combustion chamber. The number of the fire row is at least one. Each of the fire rows forms a first receiving cavity and an air supply chamber. cavity and a mixing hole group. The air supply cavity and the mixing hole group are located between the first receiving cavity and the combustion chamber. The air supply cavity is connected to the first receiving cavity and the combustion chamber respectively. The combustion chamber is connected, and the number of the mixing hole groups corresponding to each of the fire rows is multiple. Each of the mixing hole groups includes at least one mixing hole, and the mixing hole is connected to the air supply. The cavity is connected, and the opening at one end of the air supply cavity toward the combustion chamber is an air outlet. Along the length direction of the fire row, two adjacent groups of mixing holes are connected to the flow path corresponding to the air outlet. are not equal in length.
2. The combustion device according to claim 1, among the two adjacent mixing hole groups along the length direction of the fire row, one of the mixing hole groups is the first mixing hole group, and the other one is the first mixing hole group. The mixing hole group is a second mixing hole, the length of the flow path from the first mixing hole group to the corresponding air outlet and the length of the flow path from the second mixing hole group to the corresponding air outlet are The lengths are not equal, and the first mixing hole group and the second mixing hole group are alternately arranged along the length direction of the fire row.
3. The combustion device according to claim 1, along the length direction of the fire row, the length of the flow path from the mixing hole group to the corresponding gas outlet changes periodically, and the length of the flow path from the mixing hole group to the corresponding gas outlet changes periodically. The length of the flow path of the air outlet first increases and then decreases or first decreases and then increases within one cycle.
4. The combustion device according to any one of claims 1 to 3, the first receiving chamber is used to receive primary air, the mixing hole is used to provide fuel to the air supply chamber, and each of the fire rows corresponds to The number of air supply chambers is at least one, and the mixing hole groups are provided on opposite sides of each air supply chamber. The mixing holes of the mixing hole groups on both sides are arranged oppositely, and the mixing holes on both sides are arranged oppositely. The direction in which the mixing holes are relatively arranged is intersecting with the length direction of the fire row.
5. The combustion device according to any one of claims 1 to 3, the lengths of the flow paths from all mixing holes in each mixing hole group to the corresponding gas outlet are equal, and each mixing hole group The length of the flow path to the air outlet is the length of the flow path from the mixing hole to the air outlet.
6. The combustion device according to claim 5, the first receiving chamber is used to receive primary air, the mixing hole is used to provide fuel to the air supply chamber, and the air supply chamber corresponding to each of the fire rows is The number is one or more; along the length direction of the fire row, among all the mixing hole groups corresponding to each fire row, the mixing hole group located at one end of the air supply chamber is the third mixing hole group. Material hole group, the length of the flow path from the third mixing hole group to the corresponding air outlet is the third distance, and the mixing hole group located at the other end of the air supply chamber is the fourth mixing hole group, The length of the flow path from the fourth mixing hole group to the corresponding air outlet is a fourth distance, and the other mixing hole groups are located in the third mixing hole group and the fourth mixing hole group. The length of the flow path from the remaining mixing hole groups to the corresponding air outlet is greater than or equal to the larger of the third distance and the fourth distance.
7. The combustion device according to any one of claims 1 to 3, the number of the air supply chambers corresponding to each of the fire rows is multiple, and the plurality of air supply chambers are spaced apart along the length direction of the fire row. Arranged, each air supply chamber corresponds to one mixing hole group.
8. The combustion device according to any one of claims 1 to 3, the first receiving chamber is used to receive primary air, the air supply chamber is used to receive primary air from the first receiving chamber, and the mixing hole For providing fuel to the air supply chamber, the opening at one end of the first receiving chamber away from the air supply chamber is an air collection port, and the opening at one end of the air supply chamber toward the first receiving chamber is an air inlet. The sum of the flow areas of all the air collecting ports is greater than the sum of the flow areas of all the air inlets.
9. The combustion device according to any one of claims 1 to 3, the first receiving chamber is used to receive primary air, the air supply chamber is used to receive primary air from the first receiving chamber, and the mixing hole It is used to provide fuel to the air supply chamber. The air supply chamber has a columnar structure. The flow cross section of the air supply chamber is a target cross section. The air supply chamber has a characteristic size. The characteristic size is the air supply chamber. The hydraulic diameter or the minimum span on the target section through the geometric center of the target section, the length of the flow path from the mixing hole to the corresponding air outlet is greater than or equal to the characteristic size, and the mixing The length of the flow path from the hole to the corresponding air outlet is less than or equal to ten times the characteristic dimension.
10. The combustion device according to any one of claims 1 to 3, the first receiving chamber is used to receive primary air, the air supply chamber is used to receive primary air from the first receiving chamber, and the mixing hole For providing fuel to the air supply chamber, the flow area of the first receiving chamber gradually decreases along the direction of the first receiving chamber pointing to the air supply chamber, and the first receiving chamber faces the The opening at one end of the air supply chamber is a transition port, projected along the arrangement direction of the first receiving chamber and the air supply chamber, and the opening at one end of the air supply chamber toward the first receiving chamber is an air inlet, The projected area of the air inlet is located within the projected area of the transition port; the sum of the flow areas of all the air inlets is greater than or equal to 5 times the sum of the cross-sectional areas of all the mixing holes. The sum of the flow areas of the air inlets is less than or equal to 10 times the sum of the cross-sectional areas of all the mixing holes.
11. The combustion device according to any one of claims 1 to 3, the first receiving chamber is used to receive primary air, the air supply chamber is used to receive primary air from the first receiving chamber, and the mixing hole Used to provide fuel to the air supply chamber, the opening of one end of the air supply chamber toward the first receiving chamber of the receiving chamber is an air inlet, and the opening of one end of the first receiving chamber toward the air inlet It is a transition port, projected along the arrangement direction of the first receiving chamber and the air supply chamber, and the projection area of the air inlet is located in the projection area of the transition port; the number of the fire rows is multiple, A plurality of the fire rows are arranged at intervals, and the plurality of fire rows and the combustion chamber are surrounded by an auxiliary chamber connected to the combustion chamber. The auxiliary chamber is used to receive secondary air. The minimum size of the auxiliary chamber The flow area is the first area, the sum of the flow areas of all the air inlets is the second area, the second area ratio, the sum of the first area and the second area is the second area ratio, and the volume ratio of the primary air The sum of the volume of primary air and the volume of secondary air is the proportion of primary air. The proportion of the second area is greater than or equal to the difference between the proportion of primary air and 5%. The proportion of the second area is less than or equal to the proportion of primary air and 5%. %Sum.
12. According to the combustion device of claim 11, the proportion of primary air is 50% to 70%.
13. The combustion device according to claim 1, said fire row includes:

    An air collector, the first receiving cavity is formed in the air collector;

    A fuel collector is at least partially located in the combustion chamber, the fuel collector and the combustion chamber are surrounded by the combustion chamber, the combustion collector is connected to the air collector, and the fuel collector forms There is a second receiving cavity; and

    A communication device is connected to the fuel collector, the communication device is at least partially located in the second receiving chamber, and the air supply chamber and the mixing hole group are formed in the communication device.
14. The combustion device according to claim 13, the number of the communicating devices is multiple, and the multiple connecting devices are arranged at intervals along the length direction of the fire row, and the fuel collector has a structure surrounding the second The surrounding wall of the receiving cavity includes a first wall and a second wall arranged oppositely, and the arrangement direction of the first wall and the second wall is intersecting with the length direction of the fire row, and all the At least one of the connectors is a first connector, the first connector is connected to the first wall and is spaced apart from the second wall, and at least one of all the connectors is a first connector. is a second connector, the second connector is connected to the second wall and the first wall is spaced apart, the first connector and the second connector alternate along the length direction of the fire row It is arranged that, projected along the length direction of the fire row, the projected area of the first connector partially overlaps the projected area of the second connector.
15. The combustion device according to claim 13 or 14, the fuel collector comprising:

    A first mounting part is installed on the combustion chamber, the first mounting part penetrates the side wall of the combustion chamber, and the first mounting part forms a fuel input chamber that communicates with the second receiving chamber; and

    A second mounting part is connected to the first mounting part, the second mounting part is located in the combustion chamber, and the second receiving cavity is formed in the second mounting part.
16. A gas water heater including:

    The combustion device according to any one of claims 1 to 15;

    A heat exchanger located at one end of the combustion chamber to receive the heat released in the combustion chamber to heat the water in the heat exchanger; and

    A fan is used to provide power to the primary air so that the primary air flows to the combustion chamber.

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