Combustion device and gas water heater
By setting up an air-cooled plate on the outside of the combustion chamber to form a heat dissipation channel, the ambient temperature of the ultraviolet flame detector is solved, and the problem of shortening the detector life and detection accuracy in the gas water heater is achieved, achieving higher detection accuracy and reliability.
Patent Information
- Application Number
- CN202420639259.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-03-29
AI Technical Summary
In existing gas water heaters, the service life of the ultraviolet flame detector is shortened due to the high ambient temperature, and it is impossible to accurately determine whether there is flame burning in the combustion chamber, resulting in an increase in fault false alarms.
An air-cooled plate is installed on the outside of the combustion chamber to form a heat dissipation channel, and the ambient temperature of the probe assembly is reduced through air-cooling, ensuring the normal operation of the ultraviolet flame detector and effectively collecting ion signals.
It extends the service life of the ultraviolet flame detector, improves its detection accuracy, avoids fault false alarms, and ensures accurate judgment of flames in the combustion chamber.
Smart Images
Figure CN222143398U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gas water heaters, in particular to a combustion device and a gas water heater. Background Art
[0002] The flame detection technologies commonly used in gas water heater equipment are mainly flame ion detection and thermocouple potential detection. The thermocouple potential response process is too slow. The flame ion detection response time is faster than the thermocouple, but its high temperature resistance is poor.
[0003] The ambient temperature of the currently commonly used ultraviolet flame detectors during normal operation cannot exceed 50°C, while the ambient temperature of the combustion chamber in which the existing ultraviolet flame detectors are located is too high, which not only reduces the service life of the ultraviolet flame detectors, but also makes it impossible for the ultraviolet flame detectors to effectively collect ion signals, increasing the possibility of false alarms. Utility Model Content
[0004] One of the technical problems solved by the utility model is to provide a combustion device which can effectively solve the technical problems existing in the prior art that the ambient temperature of the combustion chamber is too high, resulting in a reduced service life of the ultraviolet flame detector and an inability to accurately judge whether there is a flame burning in the combustion chamber.
[0005] The second technical problem solved by the utility model is to provide a gas water heater which can effectively solve the technical problems in the prior art that the ambient temperature of the combustion chamber is too high, resulting in a reduced service life of the ultraviolet flame detector and an inability to accurately determine whether there is flame combustion in the combustion chamber.
[0006] The first technical problem mentioned above is solved by the following technical solution:
[0007] Combustion device, comprising:
[0008] A combustion chamber, wherein a burner is arranged in the combustion chamber, and an air inlet cavity is provided at the bottom of the combustion chamber; the combustion chamber is provided with an air vent, and the air vent is arranged opposite to the flame-spraying part of the burner;
[0009] An air cooling plate, the air cooling plate is arranged on the outer side of the combustion chamber and forms a heat dissipation channel with the outer side of the combustion chamber, the heat dissipation channel is respectively connected with the air vent and the air inlet cavity; the air cooling plate is provided with a detection hole connected with the heat dissipation channel;
[0010] An ultraviolet flame detector, wherein the probe assembly of the ultraviolet flame detector is arranged on the outside of the air-cooling plate and detects whether there is a flame in the flame-spraying part through the detection hole and the ventilation hole.
[0011] Compared with the background technology, the combustion device described in the utility model has the following beneficial effects:
[0012] The air cooling plate is arranged on the outer side of the combustion chamber and forms a heat dissipation channel with the outer side of the combustion chamber. When the air in the air inlet cavity in the combustion chamber passes through the heat dissipation channel, the probe assembly on the outer side of the air cooling plate is cooled by air cooling, thereby reducing the ambient temperature of the probe assembly when it is working, avoiding the reduction of the service life of the ultraviolet flame detector, and ensuring the normal operation of the ultraviolet flame detector, so as to effectively collect the ion signal generated when the gas is burned in the combustion chamber, thereby accurately judging whether there is flame burning in the combustion chamber, and improving the detection accuracy of the ultraviolet flame detector.
[0013] In one of the embodiments, a projection of the detection hole along the front-to-back direction at least partially overlaps with a projection of the ventilation hole along the front-to-back direction.
[0014] In one of the embodiments, the air-cooling plate includes a bulge and a flange, the bulge is penetrated by the detection hole, the outer edge of the bulge extends outward to form the flange, and the flange is fitted on the outer side surface of the combustion chamber so that the bulge and the outer side surface of the combustion chamber form the heat dissipation channel.
[0015] In one embodiment, the combustion device also includes a bracket assembly, which includes a mounting plate and a clamping member arranged on the outer side of the combustion chamber; one end of the probe assembly is installed on the mounting plate, and the clamping member presses the other end of the probe assembly to the air-cooled plate.
[0016] In one of the embodiments, a limiting groove is provided on the mounting plate, and one end of the probe assembly is snapped into the limiting groove; and / or the probe assembly is connected to one end of the mounting plate via a fastener.
[0017] In one of the embodiments, the probe assembly includes a shell and a purple-transmitting probe arranged in the shell, the circumferential surface of the shell is provided with a light-transmitting hole, and the purple-transmitting probe is arranged opposite to the light-transmitting hole; one end of the shell is mounted on the mounting plate, the clamping piece presses the other end of the shell against the outer side surface of the air-cooling plate, and the light-transmitting hole is connected to the detection hole.
[0018] In one embodiment, the circumferential surface of the shell is provided with a boss surrounding the light-transmitting hole, the boss is attached to the outer side of the air-cooling plate, a lip is provided through the boss, and the light-transmitting hole, the lip and the detection hole are connected in sequence.
[0019] In one embodiment, the shell includes a main body shell and a sealing sleeve, the purple-transmitting probe is arranged in the main body shell, the circumferential surface of the main body shell is provided with the light-transmitting hole, the circumferential surface of the sealing sleeve has the boss, and the sealing sleeve is arranged at one axial end of the main body shell.
[0020] In one of the embodiments, the shell further includes a sealing plug, and the sealing plug is sealed at the other axial end of the main shell.
[0021] The above second technical problem is solved by the following technical solution:
[0022] A gas water heater comprises the above-mentioned combustion device.
[0023] Compared with the background technology, the gas water heater of the utility model has the following beneficial effects:
[0024] By installing an air cooling plate on the outside of the combustion chamber, the air cooling plate and the outer side of the combustion chamber form a heat dissipation channel, and the probe assembly on the outside of the air cooling plate is cooled by air cooling, thereby reducing the ambient temperature of the probe assembly when it is working, thereby avoiding the reduction of the service life of the ultraviolet flame detector. At the same time, the normal operation of the ultraviolet flame detector is guaranteed, so as to effectively collect the ion signal generated by the combustion of gas in the combustion chamber, so as to accurately judge whether there is flame burning in the combustion chamber, thereby improving the detection accuracy of the ultraviolet flame detector. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 It is a structural schematic diagram of a combustion device provided in an embodiment of the utility model;
[0026] Figure 2 It is a cross-sectional view of the combustion device provided by the embodiment of the utility model after the probe assembly is removed;
[0027] Figure 3 It is a schematic diagram of the structural decomposition of the combustion device provided by the embodiment of the utility model;
[0028] Figure 4 It is a structural schematic diagram of a probe assembly provided by an embodiment of the utility model;
[0029] Figure 5 It is a schematic diagram of the structural decomposition of the probe assembly provided in an embodiment of the utility model.
[0030] The names and numbers of the components in the figure are as follows:
[0031] 1. Combustion chamber; 10. Air inlet cavity; 11. Back plate; 111. Air vent; 112. Connecting hole; 12. Bottom plate; 13. Front cover; 2. Air cooling plate; 20. Heat dissipation channel; 21. Bump; 211. Detection hole; 22. Flanging; 3. Probe assembly; 31. Shell; 311. Main shell; 3111. Light-transmitting hole; 312. Sealing sleeve; 3121. Boss; 31210. Lip; 313. Sealing plug; 32. Translucent probe; 4. Mounting plate; 41. Limiting groove; 5. Pressing piece; 51. Fixing part; 52. Pressing part; 6. Burner; 61. Fire grate; 62. Burner front plate; 7. Limiting plate; 8. Fan assembly; 9. Gas distribution pipe assembly. DETAILED DESCRIPTION
[0032] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention are further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, rather than all of them.
[0033] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0034] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" or "above" a second feature includes that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
[0035] In the description of this embodiment, terms such as "up", "down", "right", and "left" and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of description and simplification of operation, and 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. Therefore, they should not be understood as limitations on the present utility model.
[0036] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.
[0037] This embodiment proposes a gas water heater, which includes a combustion device, a heat exchanger, a smoke exhaust device, etc. Since the gas water heater is a prior art, the structure and working process of the gas water heater are not described in detail.
[0038] like Figure 1 and Figure 2 As shown, the combustion device includes a combustion chamber 1, a burner 6, a fan assembly 8 and an air distribution pipe assembly 9. The burner 6 and the air distribution pipe assembly 9 are arranged in the combustion chamber 1, and the bottom of the combustion chamber 1 has an air inlet chamber 10. The fan assembly 8 is installed below the combustion chamber 1, and the volute outlet of the fan assembly 8 is connected to the air inlet chamber 10 to provide sufficient combustion-supporting air to the air inlet chamber 10. The combustion chamber 1 includes a U-shaped enclosure, a front cover 13 and a bottom plate 12. The enclosure includes left and right side plates and a back plate 11 located between the left and right side plates. The bottom plate 12 is arranged at the lower end of the enclosure, and the front cover 13 is arranged at the front end of the enclosure.
[0039] Specifically, the bottom plate 12 of the combustion chamber 1, the burner front plate 62 of the burner 6 and the air flow limiting plate 7 together form an air inlet cavity 10. A plurality of air inlet holes are provided on the burner front plate 62 and the air flow limiting plate 7, so that a part of the air in the air inlet cavity 10 can be evenly passed through the air inlet holes of the burner front plate 62 and upwardly enter the space where the fire grate 61 is located. When the burner 6 burns natural gas, a part of the air in the air inlet cavity 10 can evenly enter the gap between the burner front plate 62 and the gas distribution pipe assembly 9 through the air inlet holes of the air flow limiting plate 7, so as to facilitate the air in the gap to be drawn into the fire grate 61 to provide primary air. If the burner 6 burns rich hydrogen or pure hydrogen, the gap between the gas distribution pipe assembly 9 and the burner front plate 62 is sealed by an air sealing gasket to prevent primary air supply.
[0040] The ambient temperature of the currently commonly used ultraviolet flame detector during normal operation cannot exceed 50°C, while the ambient temperature of the combustion chamber 1 where the ultraviolet flame detector is located is too high, which not only reduces the service life of the ultraviolet flame detector, but also makes it impossible for the ultraviolet flame detector to effectively collect ion signals, thereby increasing the possibility of false alarms.
[0041] To solve the above problems, Figure 1 and Figure 2As shown, the combustion device of this embodiment also includes an air cooling plate 2 and an ultraviolet flame detector. The combustion chamber 1 is provided with an air vent 111, and the air vent 111 is arranged opposite to the flame-spraying part of the burner 6. The air cooling plate 2 is arranged on the outer side of the combustion chamber 1 and forms a heat dissipation channel 20 with the outer side of the combustion chamber 1, and the heat dissipation channel 20 is respectively connected with the air vent 111 and the air inlet chamber 10. The air cooling plate 2 is provided with a detection hole 211 connected with the heat dissipation channel 20. The probe assembly 3 of the ultraviolet flame detector is arranged on the outer side of the air cooling plate 2 and detects whether there is a flame in the flame-spraying part through the detection hole 211 and the air vent 111. By forming a heat dissipation channel 20 with the air cooling plate 2 and the outer side surface of the combustion chamber 1, when the air of the air inlet cavity 10 flows through the heat dissipation channel 20, the probe assembly 3 on the outer side of the air cooling plate 2 can be cooled by air cooling, thereby reducing the ambient temperature of the probe assembly 3 when working, avoiding the reduction of the service life of the ultraviolet flame detector, and ensuring the normal operation of the ultraviolet flame detector, so as to effectively collect the ion signal generated by the combustion of gas in the combustion chamber 1, thereby accurately judging whether there is flame burning in the flame-spraying part in the combustion chamber 1, thereby improving the detection accuracy of the ultraviolet flame detector.
[0042] like Figure 2 As shown, the outer side of the back plate 11 is provided with an air cooling plate 2, and the air cooling plate 2 and the back plate 11 form a heat dissipation channel 20. The back plate 11 is provided with a vent hole 111 and a connecting hole 112, and the vent hole 111 is located above the connecting hole 112. The lower end of the heat dissipation channel 20 is connected to the air inlet cavity 10 through the vent hole 111, and the upper end of the heat dissipation channel 20 is connected to the space where the fire bar 61 is located in the combustion chamber 1 through the vent hole 111. Since the projection of the vent hole 111 along the front-to-back direction and the projection of the fire-spraying part of the fire bar 61 along the front-to-back direction at least partially overlap, the height of the vent hole 111 and the fire-spraying part of the fire bar 61 along the up-down direction is basically the same, which facilitates the light waves generated by the flame of the fire-spraying part of the fire bar 61 to enter the heat dissipation channel 20 through the vent hole 111, so that the probe assembly 3 can effectively detect the light waves entering the heat dissipation channel 20 through the detection hole 211.
[0043] In one of the embodiments, the projection of the detection hole 211 along the front-to-back direction at least partially overlaps with the projection of the ventilation hole 111 along the front-to-back direction, so that the heights of the probe assembly 3, the detection hole 211, the ventilation hole 111 and the flame-spraying part of the fire grate 61 along the up-down direction are basically consistent, which is beneficial for the probe assembly 3 to more effectively collect the ion signal generated when the gas is burned in the combustion chamber 1, thereby accurately judging whether there is flame burning in the combustion chamber 1, thereby improving the accuracy of detection.
[0044] like Figure 1 and Figure 2As shown, the air cooling plate 2 includes a convex 21 and a flange 22. The convex 21 is provided with a detection hole 211. The outer edge of the convex 21 extends outward to form a flange 22. The flange 22 is fitted to the outer side of the combustion chamber 1, so that the convex 21 and the outer side of the combustion chamber 1 form a heat dissipation channel 20. The inner side of the air cooling plate 2 is recessed toward the outer side to form the convex 21, so that the heat dissipation channel 20 is located outside the combustion chamber 1 to avoid occupying the internal space of the combustion chamber 1. The flange 22 is tightly fitted with the outer side of the back plate 11, which improves the sealing of the heat dissipation channel 20 and prevents air from leaking to the outside of the heat dissipation channel 20.
[0045] In one embodiment, the flange 22 is connected to the back plate 11 by bolts to realize the detachable installation of the air cooling plate 2, thereby improving the efficiency of disassembly and assembly of the air cooling plate 2. At the same time, by tightening the bolts, the flange 22 is more closely attached to the outer side of the back plate 11, ensuring good sealing performance of the heat dissipation channel 20.
[0046] like Figure 1 and Figure 3 As shown, the combustion device also includes a bracket assembly, which includes a mounting plate 4 and a pressing member 5 arranged on the outer side of the combustion chamber 1. One end of the probe assembly 3 is mounted on the mounting plate 4, and the pressing member 5 presses the other end of the probe assembly 3 to the air-cooled plate 2. The two ends of the probe assembly 3 are fixed by the mounting plate 4 and the pressing member 5, so that the probe assembly 3 is stably installed. At the same time, the pressing member 5 presses the probe assembly 3 and the air-cooled plate 2, so that the probe assembly 3 can block the detection hole 211, improves the sealing effect between the probe assembly 3 and the detection hole 211, and realizes the sealed connection between the probe assembly 3 and the air-cooled plate 2.
[0047] Specifically, one end of the probe assembly 3 is connected to the mounting plate 4 by a fastener. A threaded hole is provided on the mounting plate 4 of this embodiment, and an assembly hole is correspondingly provided at one end of the probe assembly 3. The bolt passes through the assembly hole and is threadedly connected with the threaded hole, thereby realizing the detachable installation of the probe assembly 3 and improving the disassembly and assembly efficiency and connection stability of the probe assembly 3.
[0048] Furthermore, a limiting groove 41 is provided on the mounting plate 4, and one end of the probe assembly 3 is clamped in the limiting groove 41. The clamping cooperation between the probe assembly 3 and the limiting groove 41 realizes the pre-positioning of the probe assembly 3, and at the same time facilitates the rapid alignment of the assembly hole of the probe assembly 3 and the threaded hole of the mounting plate 4, further improving the assembly efficiency and stability of the probe assembly 3.
[0049] In one embodiment, if Figure 3As shown, the pressing member 5 includes a connected fixing portion 51 and a pressing portion 52, the fixing portion 51 is arranged on the air-cooling plate 2, and the pressing portion 52 is pressed against the probe assembly 3 along the circumference of the probe assembly 3. Specifically, the fixing portion 51 is fixedly mounted on the flange 22 by bolts, the probe assembly 3 is roughly cylindrical, and the pressing portion 52 is an arc-shaped clamp, so that the pressing portion 52 is pressed against the probe assembly 3 along the circumference of the probe assembly 3, thereby improving the pressing effect of the pressing member 5.
[0050] like Figure 4 and Figure 5 As shown, the probe assembly 3 includes a shell 31 and a purple-transmitting probe 32 disposed in the shell 31. The circumferential surface of the shell 31 is provided with a light-transmitting hole 3111, and the purple-transmitting probe 32 is arranged opposite to the light-transmitting hole 3111. One end of the shell 31 is mounted on the mounting plate 4, and the clamping member 5 presses the other end of the shell 31 against the outer side of the air-cooled plate 2, and the light-transmitting hole 3111 is connected to the detection hole 211. The purple-transmitting probe 32 collects light waves in the heat dissipation channel 20 through the light-transmitting hole 3111 and the detection hole 211 to accurately determine whether there is a flame in the flame-spraying part of the fire bar 61. It should be noted that the ultraviolet flame detector also includes a controller for controlling the probe assembly 3. The controller is a prior art of the ultraviolet flame detector, and the controller of the ultraviolet flame detector will not be described in detail.
[0051] In one embodiment, the circumferential surface of the shell 31 is provided with a boss 3121 surrounding the light-transmitting hole 3111, the boss 3121 is fitted to the outer side of the air-cooling plate 2, and a lip 31210 is provided through the boss 3121, and the light-transmitting hole 3111, the lip 31210 and the detection hole 211 are connected in sequence. Since the boss 3121 is fitted to the outer side of the air-cooling plate 2, the shell 31 and the air-cooling plate 2 are sealed and installed, and the air in the heat dissipation channel 20 is prevented from escaping from the shell 31, thereby improving the sealing between the shell 31 and the air-cooling plate 2. The light-transmitting probe 32 collects light waves entering the heat dissipation channel 20 through the light-transmitting hole 3111, the lip 31210 and the detection hole 211 that are connected in sequence.
[0052] like Figure 4 and Figure 5 As shown, the housing 31 includes a main body shell 311 and a sealing sleeve 312. The transparent probe 32 is arranged in the main body shell 311. The circumferential surface of the main body shell 311 is provided with a light-transmitting hole 3111. The circumferential surface of the sealing sleeve 312 has a boss 3121 and a blocking sleeve is arranged at one axial end of the main body shell 311. The sealing sleeve 312 of this embodiment is a sealing rubber sleeve, so that the boss 3121 has good elastic deformation ability. When the housing 31 is installed on the mounting plate 4, the boss 3121 of the sealing sleeve 312 is tightly attached to the outer surface of the convex hull 21 and the lip 31210 is directly connected to the detection hole 211, so that the housing 31 and the air-cooled plate 2 are sealed and installed.
[0053] It should be noted that the two axial ends of the main body shell 311 are penetrated, and the sealing sleeve 312 is provided at one axial end of the main body shell 311, so that the one axial end of the main body shell 311 remains closed. Figure 5 As shown, the housing 31 further includes a sealing plug 313, which is disposed at the other axial end of the main housing 311, thereby achieving the closure of the other axial end of the main housing 311. The sealing sleeve 312 and the sealing plug 313 seal the two axial ends of the main housing 311, thereby improving the sealing performance of the housing 31, and preventing the air in the heat dissipation channel 20 from escaping from the housing 31.
[0054] The above embodiments are only to illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and modifications, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.
Claims
1. A combustion device, characterized in that: include: A combustion chamber (1), wherein a burner (6) is arranged in the combustion chamber (1), and the bottom of the combustion chamber (1) has an air inlet cavity (10); the combustion chamber (1) is provided with an air vent (111), and the air vent (111) is arranged opposite to a flame-spraying portion of the burner (6); An air cooling plate (2), the air cooling plate (2) being arranged on the outer side surface of the combustion chamber (1) and forming a heat dissipation channel (20) with the outer side surface of the combustion chamber (1), the heat dissipation channel (20) being respectively connected with the air vent (111) and the air inlet cavity (10); the air cooling plate (2) being provided with a detection hole (211) connected with the heat dissipation channel (20); An ultraviolet flame detector, wherein a probe assembly (3) of the ultraviolet flame detector is arranged on the outside of the air-cooling plate (2) and detects whether there is a flame in the flame-spraying part through the detection hole (211) and the ventilation hole (111).
2. The combustion device according to claim 1, characterized in that: The projection of the detection hole (211) along the front-to-back direction at least partially overlaps with the projection of the ventilation hole (111) along the front-to-back direction.
3. The combustion device according to claim 1, characterized in that: The air cooling plate (2) comprises a bulge (21) and a flange (22); the bulge (21) is penetrated by the detection hole (211); the outer edge of the bulge (21) extends outward to form the flange (22); the flange (22) is fitted on the outer side surface of the combustion chamber (1) so that the bulge (21) and the outer side surface of the combustion chamber (1) form the heat dissipation channel (20).
4. The combustion device according to claim 1, characterized in that: The combustion device also includes a bracket assembly, which includes a mounting plate (4) and a clamping member (5) arranged on the outer side of the combustion chamber (1); one end of the probe assembly (3) is mounted on the mounting plate (4), and the clamping member (5) presses the other end of the probe assembly (3) against the air-cooled plate (2).
5. The combustion device according to claim 4, characterized in that: The mounting plate (4) is provided with a limiting groove (41), and one end of the probe assembly (3) is clamped in the limiting groove (41); and / or the probe assembly (3) is connected to one end of the mounting plate (4) via a fastener.
6. The combustion device according to claim 4, characterized in that: The probe assembly (3) comprises a shell (31) and a purple-transmitting probe (32) arranged in the shell (31); a light-transmitting hole (3111) is arranged on the circumferential surface of the shell (31); the purple-transmitting probe (32) is arranged opposite to the light-transmitting hole (3111); one end of the shell (31) is mounted on the mounting plate (4); the pressing member (5) presses the other end of the shell (31) against the outer side surface of the air-cooling plate (2); and the light-transmitting hole (3111) is connected to the detection hole (211).
7. The combustion device according to claim 6, characterized in that: The circumferential surface of the shell (31) is provided with a boss (3121) surrounding the light-transmitting hole (3111); the boss (3121) is attached to the outer side surface of the air-cooling plate (2); a lip (31210) is provided through the boss (3121); the light-transmitting hole (3111), the lip (31210) and the detection hole (211) are connected in sequence.
8. The combustion device according to claim 7, characterized in that: The housing (31) comprises a main body shell (311) and a sealing sleeve (312); the purple light-transmitting probe (32) is arranged in the main body shell (311); the circumferential surface of the main body shell (311) is provided with the light-transmitting hole (3111); the circumferential surface of the sealing sleeve (312) has the boss (3121) and a sealing sleeve is arranged at one axial end of the main body shell (311).
9. The combustion device according to claim 8, characterized in that: The housing (31) further comprises a sealing plug (313), wherein the sealing plug (313) is provided for sealing at the other axial end of the main body housing (311).
10. A gas water heater, characterized in that: A combustion device comprising the combustion device according to any one of claims 1 to 9.