Combustion heat exchange assembly and gas water heater

Abstract

A combustion heat exchange assembly including a housing with a combustion chamber formed in the housing, a combustion component installed at an end of the housing, and an ignition device installed at a side wall of the combustion chamber. A cooling channel is provided at the side wall and is located at a side of the ignition device adjacent to the combustion component.

Description

CROSS-REFERENCE TO RELATED APPLICATION

[0001] This application claims priority to Chinese Patent Application No. 202423185999.X filed on December 23, 2024, the entire contents of which are incorporated herein by reference.TECHNICAL FIELD

[0002] The present application relates to the technical field of water heaters, and in particular to a combustion heat exchange assembly and a gas water heater.BACKGROUND

[0003] A gas water heater is a device that uses gas as fuel to heat cold water flowing through a heat exchanger by combustion to prepare hot water. The mixture of gas and air is usually ignited and burned by an ignition device.

[0004] In the related art, the ignition device is usually provided at the wall of the combustion chamber to ignite the gas. However, due to the high temperature at the location of the ignition device, the installation structure of the ignition device, such as the installation rubber sleeve, is prone to overheating, deformation and failure, which affects the service life of the ignition device.SUMMARY

[0005] The main purpose of the present application is to provide a combustion heat exchange assembly, which is intended to prevent the ignition device from failing and extend the service life of the ignition device.

[0006] To achieve the above purpose, the combustion heat exchange assembly provided by the present application includes:

[0007] a housing with a combustion chamber formed inside;

[0008] a combustion component installed at an end of the housing; and

[0009] an ignition device installed at a side wall of the combustion chamber,

[0010] a first cooling channel is provided at a side wall of the housing where the ignition device is installed, the first cooling channel is located at a side of the ignition device adjacent to the combustion component.

[0011] In order to achieve the above purpose, the present application further provides a gas water heater, including the combustion heat exchange assembly as described above.

[0012] In the combustion heat exchange assembly of the present application, a combustion chamber is formed in the housing, and the mixture of gas and air sprayed from the air outlet hole of the combustion component can be ignited by the ignition device and burned in the combustion chamber to form high-temperature flue gas, to achieve the function of preparing hot water. By providing the first cooling channel at the side wall of the housing where the ignition device is installed, the first cooling channel is located at the side of the ignition device adjacent to the combustion component, so that the first cooling channel can cool the side wall of the housing. This lowers the temperature at the location of the ignition device, which in turn ensures the installation reliability of the ignition device and extends the service life of the ignition device.BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application, accompanying drawings for description of the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0014] FIG. 1 is a schematic structural view of a combustion heat exchange assembly consistent with the present disclosure.

[0015] FIG. 2 is a schematic structural view of the combustion heat exchange assembly shown in FIG. 1 with a combustion component being removed.

[0016] FIG. 3 is another perspective view of the combustion heat exchange assembly shown in FIG. 2.

[0017] FIG. 4 is a cross-sectional view of the combustion heat exchange assembly shown in FIG. 1.

[0018] FIG. 5 is an exploded structural view of the combustion component consistent with the present disclosure.

[0019] The realization of the purpose, functional features and advantages of the present application will be further described in conjunction with embodiments and with reference to the accompanying drawings.DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The technical solutions in the embodiments of the present application are clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some rather than all of the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts are within the scope of the present application.

[0021] It should be noted that if there are directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application, the directional indication is only used to explain the relative position relationship and movement of the components under a specific posture (as shown in the figures). If the specific posture changes, the directional indication will also change accordingly.

[0022] Further, the meaning of “and / or” in the disclosure includes three schemes. Taking “A and / or B” as an example, it includes scheme A, or scheme B, or a scheme that both A and B satisfy.

[0023] In addition, if there are descriptions involving “first,”“second,” etc. in the embodiments of the present application, the descriptions of “first,”“second,” etc. are only used for descriptive purposes and should not be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as “first” and “second” may explicitly or implicitly include at least one of the features. In addition, the technical solutions of the various embodiments can be combined with each other, but they must be based on the fact that those skilled in the art can implement them.

[0024] In a gas water heater, ignition is usually performed by an ignition device.

[0025] The ignition device in the related art is provided at the wall of the combustion chamber. However, the ignition device usually needs to be installed close to the fire outlet of the burner, resulting in a higher temperature at the location of the ignition device. The higher temperature easily causes the installation structure of the ignition device, such as the installation rubber sleeve, to overheat and deform, resulting in failure of the ignition needle, thus affecting the service life of the ignition device.

[0026] To this end, the present application provides a combustion heat exchange assembly, which is intended to reduce the temperature at the location of the ignition device, improve the installation reliability of the ignition device, and extend the service life. The combustion heat exchange assembly is applied to a gas water heater to prepare hot water by releasing heat from the combustion of gas. It can be understood that the combustion heat exchange assembly can be applied to a gas water heater in a full premix combustion mode, and can also be applied to a gas water heater in an atmospheric combustion mode. For ease of understanding, the following is an explanation using the combustion heat exchange assembly applied to a gas water heater in the full premix combustion mode.

[0027] In an embodiment of the present application, as shown in FIG. 1 to FIG. 4, the combustion heat exchange assembly includes a housing 100, a combustion component 200 and an ignition device 300; and a combustion chamber A is formed in the housing 100. The combustion component 200 is installed at one end of the housing 100; and the ignition device 300 is installed at a side wall of the combustion chamber A. A first cooling channel 101 is provided on the side wall of the housing 100 where the ignition device 300 is installed, and the first cooling channel 101 is located at a side of the ignition device 300 adjacent to the combustion component 200.

[0028] In this embodiment, the combustion chamber A is formed in the housing 100, and the gas and air mixture sprayed from an air outlet hole 201 of the combustion component 200 can be ignited by the ignition device 300 and burn in the combustion chamber A to form high-temperature flue gas. The high-temperature flue gas flows downstream and can exchange heat with the heat exchange component 400 to heat the water in the heat exchange component 400, to achieve the function of preparing hot water. It can be understood that a flow direction of the high-temperature flue gas can be from bottom to top, or from top to bottom, and its specific flow direction can be determined according to the position of the fan and the design of the air duct. On this basis, the combustion component 200 can be installed at the upper end or the lower end of the housing 100, and correspondingly, the heat exchange component 400 can be installed below or above the housing 100.

[0029] It should be noted that the gas and air mixture ejected from the air outlet hole 201 of the combustion component 200 is ignited and burned by the ignition device 300. In an embodiment, the ignition device 300 includes an installation seat 310 and an ignition needle structure. The ignition needle structure is installed at the side wall of the combustion chamber A through the installation seat 310, so that the ignition needle structure can extend into the combustion chamber A for discharge ignition. In order to ensure safety, the installation seat 310 is usually selected from insulating structures such as rubber sleeves and ceramics. Since the ignition device 300 is located on the side wall of the combustion chamber A, during the combustion process, the temperature of the side wall of the combustion chamber A where the ignition device 300 is located will be very high. The installation seat 310 may be deformed by heat, loosened, or even fall off in a high temperature environment for a long time, resulting in failure of the ignition needle structure. Based on this, in this embodiment, the first cooling channel 101 is provided at the side wall of the housing 100 where the ignition device 300 is installed, and the first cooling channel 101 is located on the side of the ignition device 300 close to the combustion component 200, so that the first cooling channel 101 can cool the side wall of the housing 100, and the wall temperature where the ignition device 300 is located is reduced, thereby preventing the installation seat 310 from overheating and deformation. This ensures the installation reliability of the ignition device 300 and extends the service life of the ignition device 300.

[0030] It can be understood that after the gas and air mixture comes out of the air outlet hole 201, it is ignited by the ignition device 300, and the high-temperature flue gas generated during the combustion will flow downstream to exchange heat with the heat exchange component 400 for cooling. Then, the temperature of the area on the side wall of the housing 100 close to the combustion component 200 will be relatively higher. Therefore, in this embodiment, by providing the first cooling channel 101 at the side of the ignition device 300 close to the combustion component 200, compared with the method of only providing the cooling channel at the side of the ignition device 300 away from the combustion component 200, this embodiment can achieve a better cooling effect on the location of the ignition device 300. In an embodiment, as shown in FIG. 1 and FIG. 2, taking the flow of flue gas from top to bottom as an example, the housing 100 is formed as a frame structure with open at the upper and lower ends, the combustion component 200 is installed at the opening at the upper end of the housing 100, and the air outlet hole 201 is used to spray the gas and air mixture downward. The ignition device 300 is installed in the area near the upper part of the side wall of the housing 100, and the first cooling channel 101 is located above the ignition device 300.

[0031] In practical applications, the specific structure of the first cooling channel 101 can be determined according to actual conditions, for example, it can be a channel formed by the side wall of the housing 100 itself, or it can be a pipe structure installed at the side wall of the housing 100. The fluid in the first cooling channel 101 can be water or other coolants. In this embodiment, considering factors such as material cost and efficiency of preparing hot water, the fluid in the first cooling channel 101 is water. In an embodiment, the first cooling channel 101 can be connected to the water system of the water heater, for example, it can communicate with the water inlet pipe or the heat exchange component 400.

[0032] In summary, in the combustion heat exchange assembly of the technical solution of the present application, the combustion chamber A is formed in the housing 100, and the gas and air mixture sprayed from the air outlet hole 201 of the combustion component 200 can be ignited by the ignition device 300, and burn in the combustion chamber A to form high-temperature flue gas, to achieve the function of preparing hot water. By providing the first cooling channel 101 on the side wall of the housing 100 where the ignition device 300 is installed, and the first cooling channel 101 is located on the side of the ignition device 300 close to the combustion component 200, so that the first cooling channel 101 can cool the side wall of the housing 100, and the temperature at the location of the ignition device 300 is reduced. This ensures the installation reliability of the ignition device 300 and extends the service life of the ignition device 300.

[0033] In an embodiment of the present application, as shown in FIGS. 1 to 4, a second cooling channel 102 is provided at the side wall of the housing 100 where the ignition device 300 is installed, and located at the side of the ignition device 300 opposite to the first cooling channel 101.

[0034] In this embodiment, by providing the second cooling channel 102 at the housing 100, the ignition device 300 is sandwiched between the first cooling channel 101 and the second cooling channel 102, so that both sides of the ignition device 300 have cooling channels, that is, the wall temperature on both sides of the ignition device 300 will be reduced, thereby effectively reducing the temperature of the wall surface of the combustion chamber A, thereby further improving the installation reliability of the ignition device 300 and ensuring the ignition performance.

[0035] In an embodiment, the first cooling channel 101 and the second cooling channel 102 can be provided in parallel, or provided in series. In this embodiment, considering the heat exchange efficiency, the first cooling channel 101 and the second cooling channel 102 are provided in parallel. At this time, the inlets of the two cooling channels are connected to each other, and the outlets are connected to each other. Then, the water entering the two cooling channels from the inlets is at a lower temperature. Compared with the series connection, on the one hand, the temperature difference between the water in the cooling channel and the combustion chamber A is increased, and the heat exchange efficiency is higher. On the other hand, the flow cross-sectional area is increased and the water flow resistance is reduced, thereby being able to cool the wall of the combustion chamber A more quickly.

[0036] Further, as shown in FIG. 1 to FIG. 4, a third cooling channel 103 is further provided at the side wall of the housing 100 where the ignition device 300 is installed. The third cooling channel 103 is located at the side of the second cooling channel 102 opposite to the ignition device 300.

[0037] By providing the third cooling channel 103 at the housing 100, the cooling effect on the wall surface of the combustion chamber A can be further improved, so that the temperature at the location of the ignition device 300 can be effectively reduced, and the installation reliability of the ignition device 300 can be further improved.

[0038] In an embodiment, the first cooling channel 101, the second cooling channel 102, and the third cooling channel 103 can be provided in parallel, or provided in series. In this embodiment, considering the heat exchange efficiency, the first cooling channel 101, the second cooling channel 102, and the third cooling channel 103 are provided in parallel. At this time, the inlets of the three cooling channels are connected to each other, and the outlets are connected to each other. Then, the water entering the three cooling channels from the inlets is at a lower temperature. Compared with the series connection, on the one hand, the temperature difference between the water in the cooling channel and the combustion chamber A is increased, and the heat exchange efficiency is higher. On the other hand, the flow cross-sectional area is increased and the water flow resistance is reduced, thereby being able to cool the wall of the combustion chamber A more quickly.

[0039] In an embodiment, the structures of the first cooling channel 101, the second cooling channel 102, and the third cooling channel 103 may be the same or different, and the three cooling channels may be parallel or non-parallel.

[0040] In an embodiment, as shown in FIG. 1 to FIG. 4, the first cooling channel 101 is provided to extend in a lateral direction of the side wall of the housing 100. Such a design can extend the heat exchange length of the first cooling channel 101 and increase the heat exchange area, thereby accelerating the cooling efficiency of the wall surface of the combustion chamber A.

[0041] In an embodiment, the second cooling channel 102 is provided to extend in the lateral direction of the side wall of the housing 100. Such a design can extend the heat exchange length of the second cooling channel 102 and increase the heat exchange area, thereby accelerating the cooling efficiency of the wall surface of the combustion chamber A.

[0042] In an embodiment, the third cooling channel 103 is provided to extend in the lateral direction of the side wall of the housing 100. Such a design can extend the heat exchange length of the third cooling channel 103 and increase the heat exchange area, thereby accelerating the cooling efficiency of the wall surface of the combustion chamber A.

[0043] It can be seen that the first cooling channel 101, the second cooling channel 102, and the third cooling channel 103 are arranged in parallel in the height direction of the side wall of the housing 100, which can improve the heat exchange efficiency on the one hand, effectively prevent the wall of the combustion chamber A from overheating on the other hand, and prevent the ignition device 300 from overheating and failure.

[0044] In actual application, the height distance between the ignition device 300 and the combustion component 200 needs to be within a preset range. On this basis, the diameter of the first cooling channel 101 should not be too large. If it is too large, it is easy to interfere with the ignition device 300. Therefore, in this embodiment, the flow cross-sectional area of the first cooling channel 101 is smaller than the flow cross-sectional area of the third cooling channel 103, which can smoothly install the ignition device 300 while ensuring the cooling effect on the wall of the combustion chamber A. At the same time, it is also possible to prevent the height of the housing 100 from being too high.

[0045] In an embodiment, the flow cross-sectional area of the second cooling channel 102 can be the same as, or different from, the flow cross-sectional area of the first cooling channel 101. In this embodiment, the flow cross-sectional area of the second cooling channel 102 is the same as the flow cross-sectional area of the first cooling channel 101, which can simplify the molding process.

[0046] It can be understood that the flow cross-sectional area of the third cooling channel 103 is greater than the flow cross-sectional area of the first cooling channel 101, and may also be greater than the flow cross-sectional area of the second cooling channel 102.

[0047] In an embodiment, the flow cross-sectional shape of the first cooling channel 101 is circular.

[0048] In an embodiment, the flow cross-sectional shape of the second cooling channel 102 is circular.

[0049] In an embodiment, the flow cross-sectional shape of the third cooling channel 103 is elliptical.

[0050] In an embodiment of the present application, as shown in FIG. 3 and FIG. 4, the combustion heat exchange assembly further includes a heat exchange component 400 installed at the housing 100, and the heat exchange component 400 is located on the downstream side of the flue gas in the combustion chamber A. The heat exchange component 400 has a heat exchange channel 401, and the heat exchange channel 401 communicates with the first cooling channel 101.

[0051] In this embodiment, the heat exchange component 400 is installed at the downstream side of the flue gas in the combustion chamber A, so that the high-temperature flue gas generated by the combustion can flow to the heat exchange component 400 for heat exchange, to heat the water in the heat exchange channel 401. In an embodiment, the heat exchange component 400 includes a fin group 410 and a plurality of heat exchange tubes 420 provided at the fin group 410, and the plurality of heat exchange tubes 420 are connected in series to form the heat exchange channel 401. By communicating the first cooling channel 101 with the heat exchange channel 401, the cooling water in the first cooling channel 101 can be provided by the water inlet pipe of the water heater without the need to provide a special water supply structure for the first cooling channel 101.

[0052] Further, as shown in FIG. 2 and FIG. 4, the first cooling channel 101 is located at the fluid downstream with respect to the heat exchange channel 401.

[0053] It can be understood that in the height direction, the heat exchange channel 401 is located below the first cooling channel 101. At the same time, since the high-temperature flue gas flows from top to bottom, in this embodiment, the first cooling channel 101 is located at the fluid downstream with respect to the heat exchange channel 401, so that the water flows through the lower heat exchange channel 401 before entering the upper first cooling channel 101, thereby achieving the purpose of counter-flow of water and high-temperature flue gas and improving the heat exchange efficiency.

[0054] To achieve a better cooling effect on the wall of the combustion chamber A, in an embodiment of the present application, as shown in FIG. 1 to FIG. 3, the housing 100 has a front side wall, a rear side wall, a left side wall and a right side wall, the first cooling channel 101. The second cooling channel 102 and the third cooling channel 103 are all located on the front side wall. The heat exchange tubes 420 extend in a left and right direction to be installed at the left and right side walls. In an embodiment, a plurality of cooling channels are also provided at the rear side wall, and a plurality of water boxes 104 are respectively provided at the left and right side walls. The plurality of water boxes 104 include a water box that connects the first cooling channel 101, the second cooling channel 102 and the third cooling channel 103 in parallel, a water box that connects two adjacent heat exchange tubes 420 in series, a cooling water box covering the left and right side walls, and so on. As a result, the left side wall, rear side wall, right side wall and front side wall of the housing 100 are all provided with cooling channels, and water enters through the heat exchange tube 420 and flows out of the cooling water box, so that the cooling channels at the left side wall, rear side wall, right side wall and front side wall of the housing 100 are communicated in sequence. This effectively cools the walls of the combustion chamber A and accelerates the efficiency of preparing hot water.

[0055] In an embodiment of the present application, as shown in FIG. 3 and FIG. 4, the ignition device 300 includes an installation seat 310, a first ignition needle 320, a second ignition needle 330 and an induction needle 340. The installation seat 310 is installed at the housing 100, and the first cooling channel 101 is located between the installation seat 310 and the combustion component 200. The first ignition needle 320 is installed at the installation seat 310 and extends into the combustion chamber A. The second ignition needle 330 is installed at the installation seat 310 and extends into the combustion chamber A. The induction needle 340 is installed at the installation seat 310 and extends into the combustion chamber A. The induction needle 340, the second ignition needle 330 and the first ignition needle 320 are arranged side by side in the horizontal direction of the housing 100, and the second ignition needle 330 is located between the induction needle 340 and the first ignition needle 320.

[0056] This embodiment illustrates the structure of the ignition device 300. The mounting base 310 serves to fix the ignition device 300 to the housing 100. In an embodiment, the mounting base 310 is generally a flat block structure, so that the first ignition needle 320, the second ignition needle 330 and the induction needle 340 can be arranged side by side. The tip of the first ignition needle 320 and the tip of the second ignition needle 330 both extend into the combustion chamber A for discharge. The two cooperate to generate an arc or an electric spark, so that the gas and air mixture in the combustion chamber A burns. The induction needle 340 serves to detect the combustion quality. If the gas combustion is incomplete, it will send an electrical signal to the electronic ignition controller, and the controller will automatically stop the gas supply to ensure the safety of the water heater.

[0057] By providing the first cooling channel 101 between the installation seat 310 and the combustion component 200, it is possible to reduce the temperature of the wall of the combustion chamber A in contact with the installation seat 310, and reduce the temperature around the installation seat 310. This ensures the structural reliability of the installation seat 310, ensures the installation reliability of the ignition device 300 and the housing 100, and ensures the ignition quality.

[0058] Further, the tip of the first ignition needle 320 and the tip of the second ignition needle 330 both face the air outlet hole 201. Such a configuration can further improve the ignition performance. It can be understood that the projection of the tip of the first ignition needle 320 and the tip of the second ignition needle 330 on the combustion component 200 at least partially falls within the range of the air outlet hole 201.

[0059] In practical application, the height distance between the ignition device 300 and the combustion component 200 should not be too small or too large. If it is too small, the ignition needle of the ignition device 300 may be in a position to be burned for a long time, which affects the service life; if it is too large, the ignition device 300 may not be able to ignite the gas. Based on this, in this embodiment, the height distance between the tip of the first ignition needle 320 and the air outlet hole 201 ranges from 6mm to 10mm; the height distance between the tip of the second ignition needle 330 and the air outlet hole 201 ranges from 6mm to 10mm, which can ensure the ignition stability and extend the service life of the ignition device 300.

[0060] In an embodiment of the present application, as shown in FIG. 1, FIG. 4 and FIG. 5, the combustion component 200 includes a frame 210, a mesh plate 220 and a metal mesh 230. The frame 210 is installed at one end of the combustion chamber A, and the frame communicates with the premixing chamber at an end opposite to the combustion chamber. The mesh plate 220 is installed at the frame 210, and the mesh plate 220 has an arc protruding toward the combustion chamber A. The mesh plate 220 is provided with a plurality of air outlet holes 201, and the metal mesh 230 is sandwiched between the mesh plate 220 and the frame 210.

[0061] This embodiment illustrates the structure of the combustion component 200, and the frame 210 serves to install and support the mesh plate 220 and the metal mesh 230. The frame communicates with the premixing chamber at an end opposite to the combustion chamber. It can be understood that the premixing chamber is a chamber for premixing gas and air, and its air inlet end can be connected with the premixer. After the gas and air are mixed in the premixing chamber, they flow to the mesh plate 220 and the metal mesh 230. Through the dispersion and diversion of the mesh plate 220 and the metal mesh 230, the gas and air are mixed more evenly and fully, then sprayed into the combustion chamber A from the multiple air outlet holes 201, and ignited and burned by the ignition device 300.

[0062] In addition, the mesh plate 220 has an arc protruding toward the combustion chamber A, that is, the mesh plate 220 gradually protrudes toward the combustion chamber A in the direction from the edge to the center of the mesh plate 220, to be able to accumulate a certain amount of mixed gas, thereby achieving continuous and stable combustion of the combustion component 200.

[0063] In an embodiment, the air outlet hole 201 is an oblong hole.

[0064] The present application also provides a gas water heater, which includes a combustion heat exchange assembly. The specific structure of the combustion heat exchange assembly refers to the above embodiment. Since the gas water heater adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described here.

Claims

1. A combustion heat exchange assembly comprising:a housing with a combustion chamber formed in the housing;a combustion component installed at an end of the housing; andan ignition device installed at a side wall of the combustion chamber;wherein a cooling channel is provided at the side wall and is located at a side of the ignition device adjacent to the combustion component.

2. The combustion heat exchange assembly of claim 1, wherein:the cooling channel is a first cooling channel; anda second cooling channel is provided at the side wall and located at a side of the ignition device opposite to the first cooling channel.

3. The combustion heat exchange assembly of claim 2, wherein the first cooling channel and the second cooling channel are arranged in parallel.

4. The combustion heat exchange assembly of claim 2, wherein a third cooling channel is provided at the side wall and located at a side of the second cooling channel opposite to the ignition device.

5. The combustion heat exchange assembly of claim 4, wherein the first cooling channel, the second cooling channel, and the third cooling channel are provided in parallel.

6. The combustion heat exchange assembly of claim 4, wherein the third cooling channel extends in a lateral direction of a side wall of the housing.

7. The combustion heat exchange assembly of claim 4, wherein a flow cross-sectional area of the first cooling channel is smaller than a flow cross-sectional area of the third cooling channel.

8. The combustion heat exchange assembly of claim 4, wherein the third cooling channel has a circular flow cross section.

9. The combustion heat exchange assembly of claim 2, wherein the second cooling channel extends in a lateral direction of a side wall of the housing.

10. The combustion heat exchange assembly of claim 2, wherein the second cooling channel has a circular flow cross section.

11. The combustion heat exchange assembly of claim 1, wherein the first cooling channel extends in a lateral direction of a side wall of the housing.

12. The combustion heat exchange assembly of claim 1, wherein the first cooling channel has a circular flow cross section.

13. The combustion heat exchange assembly of claim 1, further comprising:a heat exchange component installed at the housing and located at a downstream side of flue gas in the combustion chamber;wherein the heat exchange component is provided with a heat exchange channel communicating with the cooling channel.

14. The combustion heat exchange assembly of claim 13, wherein the cooling channel is located at a fluid downstream with respect to the heat exchange channel.

15. The combustion heat exchange assembly of claim 1, wherein the ignition device includes:an installation seat installed at the housing, the cooling channel being located between the installation seat and the combustion component;a first ignition needle installed at the installation seat and extending into the combustion chamber;a second ignition needle installed at the installation seat and extending into the combustion chamber; andan induction needle installed at the installation seat and extending into the combustion chamber, the induction needle, the second ignition needle, and the first ignition needle being provided side by side in a transverse direction of the housing.

16. The combustion heat exchange assembly of claim 15, wherein the combustion component is provided with an air outlet hole communicating with the combustion chamber, and a tip of the first ignition needle and a tip of the second ignition needle both face the air outlet hole.

17. The combustion heat exchange assembly of claim 16, wherein:a distance between the tip of the first ignition needle and the air outlet hole ranges from 6mm to 10mm; and / or a distance between the tip of the second ignition needle and the air outlet hole ranges from 6mm to 10mm.

18. The combustion heat exchange assembly of claim 1, wherein the combustion component includes: a frame installed at an end of the combustion chamber and communicating with a premixing chamber at an end opposite to the combustion chamber; a mesh plate installed at the frame and having an arc protruding toward the combustion chamber, the mesh plate being provided with a plurality of air outlet holes; and a metal mesh sandwiched between the mesh plate and the frame.

19. A gas water heater comprising a combustion heat exchange assembly including:a housing with a combustion chamber formed in the housing;a combustion component installed at an end of the housing; andan ignition device installed at a side wall of the combustion chamber;wherein a cooling channel is provided at the side wall and is located at a side of the ignition device adjacent to the combustion component.

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