Combustion heat exchange assembly and gas water heater

Abstract

The utility model discloses a kind of combustion heat exchange components and gas water heater, it is related to water heater technical field, wherein, combustion heat exchange component includes shell, combustion component and ignition device, combustion chamber is formed in shell;Combustion component is installed in one end of shell;Ignition device is installed in the side wall of combustion chamber;The side wall of shell where ignition device is installed is equipped with first cooling flow channel, and first cooling flow channel is located in the side of ignition device close to combustion component.The utility model technical scheme can make the temperature of the position where ignition device is located reduce, guarantee the installation reliability of ignition device, prolong the service life of ignition device.

Description

Technical Field

[0001] This utility model relates to the field of water heater technology, and in particular to a combustion heat exchange component and a gas water heater. Background Technology

[0002] A gas water heater is a device that uses gas as fuel to heat cold water flowing through a heat exchanger to produce hot water. The mixture of gas and air is usually ignited and burned by an ignition device.

[0003] In related technologies, ignition devices are typically installed on the combustion chamber wall to ignite the combustion gases. However, due to the high temperature at the location of the ignition device, its mounting structure, such as the mounting sleeve, is prone to overheating, deformation, and failure, thus affecting the lifespan of the ignition device. Utility Model Content

[0004] The main purpose of this invention is to provide a combustion heat exchange component that aims to prevent ignition device failure and extend the service life of the ignition device.

[0005] To achieve the above objectives, the combustion heat exchange component proposed in this utility model includes: The shell contains a combustion chamber. Combustion components are mounted at one end of the housing; and An ignition device is installed on the side wall of the combustion chamber; The housing has a first cooling channel on the side wall where the ignition device is mounted, and the first cooling channel is located on the side of the ignition device closer to the combustion component.

[0006] In one embodiment of this application, a second cooling channel is further provided on the side wall of the housing where the ignition device is mounted, and the second cooling channel is located on the side of the ignition device away from the first cooling channel.

[0007] In one embodiment of this application, the first cooling channel and the second cooling channel are arranged in parallel.

[0008] In one embodiment of this application, a third cooling channel is further provided on the side wall of the housing where the ignition device is mounted, and the third cooling channel is located on the side of the second cooling channel away from the ignition device.

[0009] In one embodiment of this application, the first cooling channel, the second cooling channel, and the third cooling channel are arranged in parallel.

[0010] In one embodiment of this application, the first cooling channel is provided to extend laterally along the sidewall of the housing; And / or, the second cooling channel is provided to extend laterally along the sidewall of the housing; And / or, the third cooling channel is provided to extend laterally along the sidewall of the housing.

[0011] In one embodiment of this application, the cross-sectional area of ​​the first cooling channel is smaller than the cross-sectional area of ​​the third cooling channel.

[0012] In one embodiment of this application, the cross-sectional shape of the first cooling channel is circular; And / or, the cross-sectional shape of the second cooling channel is circular; And / or, the cross-sectional shape of the third cooling channel is elliptical.

[0013] In one embodiment of this application, the combustion heat exchange assembly further includes a heat exchange component installed on the housing, the heat exchange component being located downstream of the flue gas in the combustion chamber; The heat exchange component has a heat exchange channel, which is connected to the first cooling channel.

[0014] In one embodiment of this application, the first cooling channel is located downstream of the heat exchange channel.

[0015] In one embodiment of this application, the ignition device includes: A mounting base is installed on the housing; the first cooling channel is located between the mounting base and the combustion component; The first ignition needle is installed in the mounting base and extends into the combustion chamber; The second ignition needle is mounted on the mounting base and extends into the combustion chamber; and The sensing needle is mounted on the mounting base and extends into the combustion chamber; the sensing needle, the second ignition needle, and the first ignition needle are arranged side by side along the transverse side of the housing.

[0016] In one embodiment of this application, the combustion component is provided with an exhaust port communicating with the combustion chamber, and the tips of the first ignition needle and the second ignition needle are both directly facing the exhaust port.

[0017] In one embodiment of this application, the distance between the tip of the first ignition needle and the vent hole is 6mm to 10mm; And / or, the distance between the tip of the second ignition needle and the vent hole is 6mm to 10mm.

[0018] In one embodiment of this application, the combustion component includes: A frame is installed at one end of the combustion chamber, and the side of the frame facing away from the combustion chamber is used to connect to the premixing chamber; A perforated plate, mounted on the frame, having an arc protruding towards the combustion chamber, and having multiple air outlets; and A metal mesh is sandwiched between the perforated plate and the frame.

[0019] To achieve the above objectives, this application also provides a gas water heater, including the aforementioned combustion heat exchange component.

[0020] In this invention's combustion heat exchange assembly, a combustion chamber is formed within the housing. A mixture of fuel gas and air injected through the exhaust port of the combustion component is ignited by an ignition device and combusted within the combustion chamber to generate high-temperature flue gas, thus achieving the function of producing hot water. By providing a first cooling channel on the side wall of the housing where the ignition device is installed, located near the combustion component, the first cooling channel can cool the side wall of the housing, lowering the temperature at the location of the ignition device. This ensures the reliability of the ignition device's installation and extends its service life. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of an embodiment of the combustion heat exchange component of this utility model; Figure 2 for Figure 1 A schematic diagram of the structure after the combustion components are hidden in the embodiment; Figure 3 for Figure 2 Another perspective view of the embodiment; Figure 4 for Figure 1 Cross-sectional view of the embodiment; Figure 5 This is a schematic diagram of the explosion structure of the combustion component in this embodiment.

[0023] Explanation of icon numbers: 100. Housing; 101. First cooling channel; 102. Second cooling channel; 103. Third cooling channel; 104. Water tank; 200. Combustion component; 210. Frame; 220. Mesh plate; 230. Metal mesh; 201. Vent; 300. Ignition device; 310. Mounting base; 320. First ignition needle; 330. Second ignition needle; 340. Sensing needle; 400. Heat exchange component; 401. Heat exchange channel; 410. Fin assembly; 420. Heat exchange tube; A. Combustion chamber.

[0024] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0027] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0028] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0029] In gas water heaters, combustion is typically achieved through an ignition device.

[0030] In related technologies, the ignition device is installed on the combustion chamber wall. However, the ignition device usually needs to be installed close to the burner's ignition port, which results in a high temperature at the location of the ignition device. The high temperature can easily cause the installation structure of the ignition device, such as the mounting sleeve, to overheat and deform, leading to the failure of the ignition needle and affecting the service life of the ignition device.

[0031] Therefore, this utility model proposes a combustion heat exchange component, aiming to reduce the temperature at the location of the ignition device, improve the installation reliability of the ignition device, and extend its service life. The combustion heat exchange component is applied in a gas water heater to produce hot water through the heat released from gas combustion. It is understood that this combustion heat exchange component can be applied to both fully premixed combustion gas water heaters and atmospheric combustion gas water heaters. For ease of understanding, the following explanation uses the application of the combustion heat exchange component in a fully premixed combustion gas water heater as an example.

[0032] In the embodiments of this utility model, such as Figures 1 to 4 As shown, the combustion heat exchange assembly includes a housing 100, a combustion component 200, and an ignition device 300; a combustion chamber A is formed inside the housing 100; the combustion component 200 is installed at one end of the housing 100; the ignition device 300 is installed on the side wall of the combustion chamber A; wherein, 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 on the side of the ignition device 300 close to the combustion component 200.

[0033] In this embodiment, a combustion chamber A is formed inside the housing 100. The gas and air mixture injected from the exhaust port 201 of the combustion component 200 can be ignited by the ignition device 300 and combusted in the combustion chamber A to form high-temperature flue gas. The high-temperature flue gas flows downstream and exchanges heat with the heat exchange component 400 to heat the water in the heat exchange component 400, thereby achieving the function of producing hot water. It can be understood that the 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. Based on this, the combustion component 200 can be installed at the upper or lower end of the housing 100, and correspondingly, the heat exchange component 400 can be installed below or above the housing 100.

[0034] It should be noted that the gas-air mixture ejected from the exhaust port 201 of the combustion component 200 is ignited by the ignition device 300. Optionally, the ignition device 300 includes a mounting base 310 and an ignition needle structure. The ignition needle structure is mounted on the side wall of the combustion chamber A via the mounting base 310, allowing the ignition needle structure to extend into the combustion chamber A for discharge ignition. To ensure safety, the mounting base 310 is typically made of insulating structures such as rubber sleeves or ceramics. Since the ignition device 300 is located on the side wall of the combustion chamber A, the temperature of the side wall of the combustion chamber A where the ignition device 300 is located will be very high during combustion. The mounting base 310 may deform due to heat and loosen or even fall off under long-term high-temperature conditions, leading to the failure of the ignition needle structure. Based on this, this embodiment provides a first cooling channel 101 on the side wall of the housing 100 where the ignition device 300 is installed. The first cooling channel 101 is located on the side of the ignition device 300 close to the combustion component 200. Thus, the first cooling channel 101 can cool and reduce the temperature of the side wall of the housing 100, thereby reducing the temperature of the wall surface where the ignition device 300 is located. This can prevent the mounting base 310 from overheating and deforming, ensuring the installation reliability of the ignition device 300 and extending the service life of the ignition device 300.

[0035] Understandably, after the gas and air mixture exits from the outlet 201, it is ignited by the ignition device 300. The high-temperature flue gas generated during combustion flows downstream and exchanges heat with the heat exchange component 400 to cool down. Therefore, the temperature of the area on the side wall of the casing 100 near the combustion component 200 will be relatively higher. Thus, in this embodiment, by placing the first cooling channel 101 on the side of the ignition device 300 near the combustion component 200, compared to only setting the cooling channel on the side of the ignition device 300 away from the combustion component 200, this embodiment achieves a better cooling effect on the location of the ignition device 300. As an example, such as... Figure 1 and Figure 2 Taking the example of flue gas flowing from top to bottom, the housing 100 is formed as a frame structure with openings at the top and bottom. The combustion component 200 is installed at the opening at the top of the housing 100, and the exhaust port 201 is used to spray the gas and air mixture downwards. 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.

[0036] In practical applications, the specific structural form of the first cooling channel 101 can be determined according to the actual situation. For example, it can be a channel formed by the side wall of the shell 100 itself, or it can be a pipe structure installed on the side wall of the shell 100. The fluid in the first cooling channel 101 can be water or other coolant. In this embodiment, considering factors such as material cost and efficiency in hot water production, water is preferred as the fluid in the first cooling channel 101. Optionally, the first cooling channel 101 can be connected to the water circuit system of the water heater, for example, it can be connected to the inlet pipe or the heat exchange component 400.

[0037] In summary, in the combustion heat exchange assembly of this utility model, a combustion chamber A is formed inside the shell 100. The gas and air mixture injected from the exhaust port 201 of the combustion component 200 can be ignited by the ignition device 300 and combusted in the combustion chamber A to form high-temperature flue gas, thereby achieving the function of preparing hot water. By providing a first cooling channel 101 on the side wall of the shell 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, the first cooling channel 101 can cool and reduce the temperature of the side wall of the shell 100, thereby lowering the temperature at the location of the ignition device 300, thus ensuring the installation reliability of the ignition device 300 and extending its service life.

[0038] In one embodiment of this application, as Figures 1 to 4 The housing 100 is provided with a second cooling channel 102 on the side wall where the ignition device 300 is installed. The second cooling channel 102 is located on the side of the ignition device 300 away from the first cooling channel 101.

[0039] In this embodiment, by providing a second cooling channel 102 on the housing 100, the ignition device 300 is sandwiched between the first cooling channel 101 and the second cooling channel 102, thereby providing cooling channels on both sides of the ignition device 300. This means that the wall temperature on both sides of the ignition device 300 will be reduced, thereby effectively reducing the temperature of the combustion chamber A wall. As a result, the installation reliability of the ignition device 300 can be further improved, ensuring ignition performance.

[0040] Optionally, the first cooling channel 101 and the second cooling channel 102 can be arranged in parallel or in series. In this embodiment, considering heat exchange efficiency, it is preferable that the first cooling channel 101 and the second cooling channel 102 are arranged in parallel, with their inlets connected to each other and their outlets connected to each other. In this case, the water entering the two cooling channels from the inlets is at a lower temperature. Compared with the series connection, this increases the temperature difference between the water in the cooling channels and the combustion chamber A, resulting in higher heat exchange efficiency. Furthermore, it increases the flow cross-sectional area and reduces water flow resistance, thereby enabling faster cooling of the combustion chamber A wall.

[0041] Furthermore, such as Figures 1 to 4 The housing 100 is provided with a third cooling channel 103 on the side wall where the ignition device 300 is installed. The third cooling channel 103 is located on the side of the second cooling channel 102 away from the ignition device 300.

[0042] By providing a third cooling channel 103 on the housing 100, the cooling effect on the combustion chamber A wall 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.

[0043] Optionally, the first cooling channel 101, the second cooling channel 102, and the third cooling channel 103 can be arranged in parallel or in series. In this embodiment, considering heat exchange efficiency, it is preferable that the first cooling channel 101, the second cooling channel 102, and the third cooling channel 103 are arranged in parallel. In this case, the inlets of the three channels are connected to each other, and the outlets are connected to each other. Thus, the water entering the three cooling channels from the inlets is at a lower temperature. Compared with the series connection, this increases the temperature difference between the water in the cooling channels and the combustion chamber A, resulting in higher heat exchange efficiency. Furthermore, it increases the flow cross-sectional area and reduces water flow resistance, thereby enabling faster cooling of the combustion chamber A wall.

[0044] Optionally, 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 may be parallel or non-parallel.

[0045] In one embodiment, such as Figures 1 to 4 The first cooling channel 101 extends laterally along the side wall of the housing 100. This 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 combustion chamber A wall.

[0046] In one embodiment, the second cooling channel 102 extends laterally along the side wall of the housing 100. This design extends the heat exchange length of the second cooling channel 102 and increases the heat exchange area, thereby accelerating the cooling efficiency of the combustion chamber A wall.

[0047] In one embodiment, the third cooling channel 103 extends laterally along the side wall of the housing 100. This design extends the heat exchange length of the third cooling channel 103 and increases the heat exchange area, thereby accelerating the cooling efficiency of the combustion chamber A wall.

[0048] Therefore, 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 along the height direction of the side wall of the shell 100. On the one hand, this can improve the heat exchange efficiency; on the other hand, it can effectively prevent the combustion chamber A wall from overheating; and on the other hand, it can also prevent the ignition device 300 from overheating and failing.

[0049] In practical applications, the height distance between the ignition device 300 and the combustion component 200 needs to be within a preset range. Based on this, the diameter of the first cooling channel 101 should not be too large. If it is too large, it will easily interfere with the ignition device 300. Therefore, in this embodiment, it is preferable that the cross-sectional area of ​​the first cooling channel 101 is smaller than the cross-sectional area of ​​the third cooling channel 103. This can ensure the smooth installation of the ignition device 300 while guaranteeing the cooling effect on the wall of the combustion chamber A. At the same time, it can also prevent the height of the housing 100 from being too high.

[0050] Optionally, the flow cross-sectional area of ​​the second cooling channel 102 may be the same as or different from the flow cross-sectional area of ​​the first cooling channel 101. In this embodiment, it is preferred that 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.

[0051] It is understandable that the cross-sectional area of ​​the third cooling channel 103 is larger than that of the first cooling channel 101, and may also be larger than that of the second cooling channel 102.

[0052] Optionally, the cross-sectional shape of the first cooling channel 101 is circular.

[0053] Optionally, the cross-sectional shape of the second cooling channel 102 is circular.

[0054] Optionally, the cross-sectional shape of the third cooling channel 103 is elliptical.

[0055] In one embodiment of this application, as Figure 3 and Figure 4 The combustion heat exchange assembly also includes a heat exchange component 400 installed on the housing 100, the heat exchange component 400 being 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, the heat exchange channel 401 being connected to the first cooling channel 101.

[0056] In this embodiment, the heat exchange component 400 is installed downstream of the flue gas in the combustion chamber A. The high-temperature flue gas generated by combustion can flow to the heat exchange component 400 for heat exchange, thereby heating the water in the heat exchange channel 401. Optionally, the heat exchange component 400 includes a fin assembly 410 and multiple heat exchange tubes 420 passing through the fin assembly 410. The multiple heat exchange tubes 420 are connected in series to form the heat exchange channel 401. By connecting the first cooling channel 101 to the heat exchange channel 401, the cooling water in the first cooling channel 101 can be supplied by the water inlet pipe of the water heater, without the need for an additional dedicated water supply structure for the first cooling channel 101.

[0057] Furthermore, such as Figure 2 and Figure 4 The first cooling channel 101 is located on the downstream side of the heat exchange channel 401.

[0058] Understandably, in the vertical direction, the heat exchange channel 401 is located below the first cooling channel 101. Since the high-temperature flue gas flows from top to bottom, this embodiment places the first cooling channel 101 downstream of the fluid in 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. This achieves the purpose of counter-current flow of water and high-temperature flue gas, thereby improving heat exchange efficiency.

[0059] To improve the cooling effect of the combustion chamber A wall, in one embodiment of this application, such as... Figures 1 to 3 The shell 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 tube 420 extends in the left and right direction to pass through and be installed on the left and right side walls. Preferably, a number of cooling channels are also provided on the rear side wall. A number of water boxes 104 are provided on the left and right side walls respectively. Among the multiple water boxes 104, there are water boxes that connect the first cooling channel 101, the second cooling channel 102, and the third cooling channel 103 in parallel, water boxes that connect two adjacent heat exchange tubes 420 in series, and cooling water boxes that cover the left and right side walls, etc. This results in cooling channels on the left, rear, right, and front walls of the shell 100. Water enters through the heat exchange pipe 420 and exits through the cooling water box, making the cooling channels on the left, rear, right, and front walls of the shell 100 connected in sequence. This effectively cools the wall surface of the combustion chamber A and accelerates the efficiency of hot water preparation.

[0060] In one embodiment of this application, as Figure 3 and Figure 4The ignition device 300 includes a mounting base 310, a first ignition needle 320, a second ignition needle 330, and a sensing needle 340. The mounting base 310 is mounted on the housing 100. A first cooling channel 101 is located between the mounting base 310 and the combustion component 200. The first ignition needle 320 is mounted on the mounting base 310 and extends into the combustion chamber A. The second ignition needle 330 is mounted on the mounting base 310 and extends into the combustion chamber A. The sensing needle 340 is mounted on the mounting base 310 and extends into the combustion chamber A. The sensing needle 340, the second ignition needle 330, and the first ignition needle 320 are arranged side by side along the transverse direction of the housing 100, with the second ignition needle 330 located between the sensing needle 340 and the first ignition needle 320.

[0061] This embodiment illustrates the structure of the ignition device 300. The mounting base 310 serves to fix the ignition device 300 onto the housing 100. Optionally, the mounting base 310 is generally a flat, block-shaped structure, allowing the first ignition needle 320, the second ignition needle 330, and the sensing needle 340 to be arranged side by side. The tips of the first ignition needle 320 and the second ignition needle 330 both extend into the combustion chamber A to discharge electricity. The two work together to generate an electric arc or spark, causing the gas-air mixture in the combustion chamber A to burn. The sensing needle 340 detects the combustion quality. If the gas combustion is incomplete, it sends an electrical signal to the electronic ignition controller, which automatically stops the gas supply to ensure the safety of the water heater.

[0062] By placing the first cooling channel 101 between the mounting base 310 and the combustion component 200, the temperature of the combustion chamber A wall in contact with the mounting base 310 can be reduced, the temperature around the mounting base 310 can be reduced, the structural reliability of the mounting base 310 can be ensured, and thus the installation reliability of the ignition device 300 and the housing 100 can be ensured, and the ignition quality can be guaranteed.

[0063] Furthermore, the tips of the first ignition needle 320 and the second ignition needle 330 are both directly opposite the exhaust port 201. This arrangement further improves ignition performance. Understandably, the projections of the tips of the first ignition needle 320 and the second ignition needle 330 onto the combustion element 200 at least partially fall within the range of the exhaust port 201.

[0064] In practical applications, 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 structure of the ignition device 300 may be in a position that is constantly exposed to flame, thus affecting its service life. If it is too large, the ignition device 300 may be unable to ignite the gas. Based on this, in this embodiment, the height distance between the tip of the first ignition needle 320 and the gas outlet 201 is set to 6mm~10mm; the height distance between the tip of the second ignition needle 330 and the gas outlet 201 is also set to 6mm~10mm. This ensures ignition stability while also extending the service life of the ignition device 300.

[0065] In one embodiment of this application, as Figure 1 , Figure 4 and Figure 5 The combustion component 200 includes a frame 210, a perforated plate 220, and a metal mesh 230. The frame 210 is installed at one end of the combustion chamber A, and the side of the frame 210 facing away from the combustion chamber A is used to connect to the premixing chamber. The perforated plate 220 is installed on the frame 210 and has an arc protruding towards the combustion chamber A. The perforated plate 220 is provided with a plurality of air outlet holes 201. The metal mesh 230 is sandwiched between the perforated plate 220 and the frame 210.

[0066] This embodiment illustrates the structure of the combustion component 200. The frame 210 serves to mount and support the perforated plate 220 and the metal mesh 230. The side of the frame 210 facing away from the combustion chamber A is used to connect to the premixing chamber. The premixing chamber is a cavity used to premix fuel gas and air, and its air inlet can be connected to a premixer. After the fuel gas and air are mixed in the premixing chamber, they flow to the perforated plate 220 and the metal mesh 230. Through the dispersing and diverting effect of the perforated plate 220 and the metal mesh 230, the fuel gas and air are mixed more evenly and thoroughly before being sprayed into the combustion chamber A through multiple air outlets 201, where they are ignited and burned by the ignition device 300.

[0067] In addition, the perforated plate 220 has an arc protruding towards the combustion chamber A, that is, the perforated plate 220 is gradually protruding towards the combustion chamber A in the direction from its edge to its center, so as to accumulate a certain amount of mixed gas and realize the continuous and stable combustion of the combustion component 200.

[0068] Optionally, the vent 201 is an oblong hole.

[0069] This utility model also proposes a gas water heater, which includes a combustion heat exchange component. The specific structure of the combustion heat exchange component is as described in the above embodiments. Since this gas water heater adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0070] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A combustion heat exchange component, characterized in that, include: The shell contains a combustion chamber. A combustion component is installed at one end of the housing; as well as An ignition device is installed on the side wall of the combustion chamber; The housing has a first cooling channel on the side wall where the ignition device is mounted, and the first cooling channel is located on the side of the ignition device closer to the combustion component.

2. The combustion heat exchange assembly as described in claim 1, characterized in that, The housing is provided with a second cooling channel on the side wall where the ignition device is mounted. The second cooling channel is located on the side of the ignition device away from the first cooling channel.

3. The combustion heat exchange assembly as described in claim 2, characterized in that, The first cooling channel and the second cooling channel are arranged in parallel.

4. The combustion heat exchange assembly as described in claim 2, characterized in that, The housing is further provided with a third cooling channel on the side wall where the ignition device is mounted. The third cooling channel is located on the side of the second cooling channel away from the ignition device.

5. The combustion heat exchange assembly as described in claim 4, characterized in that, The first cooling channel, the second cooling channel, and the third cooling channel are arranged in parallel.

6. The combustion heat exchange assembly as described in claim 4, characterized in that, The first cooling channel is provided to extend laterally along the side wall of the housing; And / or, the second cooling channel is provided to extend laterally along the sidewall of the housing; And / or, the third cooling channel is provided to extend laterally along the sidewall of the housing.

7. The combustion heat exchange assembly as described in claim 4, characterized in that, The cross-sectional area of ​​the first cooling channel is smaller than that of the third cooling channel.

8. The combustion heat exchange assembly as described in claim 4, characterized in that, The cross-sectional shape of the first cooling channel is circular; And / or, the cross-sectional shape of the second cooling channel is circular; And / or, the cross-sectional shape of the third cooling channel is elliptical.

9. The combustion heat exchange assembly according to any one of claims 1 to 8, characterized in that, The combustion heat exchange assembly further includes a heat exchange component installed on the housing, the heat exchange component being located downstream of the flue gas in the combustion chamber; The heat exchange component has a heat exchange channel, which is connected to the first cooling channel.

10. The combustion heat exchange assembly as described in claim 9, characterized in that, The first cooling channel is located on the fluid downstream side of the heat exchange channel.

11. The combustion heat exchange assembly according to any one of claims 1 to 8, characterized in that, The ignition device includes: A mounting base is installed on the housing; the first cooling channel is located between the mounting base and the combustion component; The first ignition needle is installed in the mounting base and extends into the combustion chamber; The second ignition needle is mounted on the mounting base and extends into the combustion chamber; and The sensing needle is mounted on the mounting base and extends into the combustion chamber; the sensing needle, the second ignition needle, and the first ignition needle are arranged side by side along the transverse side of the housing.

12. The combustion heat exchange assembly as claimed in claim 11, characterized in that, The combustion component is provided with an exhaust port that communicates with the combustion chamber, and the tips of the first ignition needle and the second ignition needle are both directly facing the exhaust port.

13. The combustion heat exchange assembly as described in claim 12, characterized in that, The distance between the tip of the first ignition needle and the vent hole is 6mm to 10mm; And / or, the distance between the tip of the second ignition needle and the vent hole is 6mm to 10mm.

14. The combustion heat exchange assembly according to any one of claims 1 to 8, characterized in that, The combustion component includes: A frame is installed at one end of the combustion chamber, and the side of the frame facing away from the combustion chamber is used to connect to the premixing chamber; A perforated plate, mounted on the frame, having an arc protruding towards the combustion chamber, and having multiple air outlets; and A metal mesh is sandwiched between the perforated plate and the frame.

15. A gas-fired water heater, characterized in that, Includes the combustion heat exchange assembly as described in any one of claims 1 to 14.

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