Gas water heater

Abstract

The utility model relates to a gas water heater. The gas water heater comprises a smoke exhaust connecting pipe, a shell and a sealing ring. A convex ring is arranged on the circumferential surface of the smoke exhaust connecting pipe; the shell is provided with a mounting hole for the smoke exhaust connecting pipe to penetrate through and extend out; the sealing ring is sleeved and fixed on the convex ring; the protruding ring and the sealing ring are located on the inner side of the shell, and the sealing ring is in sealing fit with the end face, facing the shell, of the protruding ring and the side face of the shell. The sealing ring and the convex ring are fixed in a sleeving manner, so that the sealing ring is not easy to bend and separate when the smoke exhaust connecting pipe is mounted on the shell, and the undesirable phenomenon of loosening of the sealing ring is avoided; the sealing ring is attached to the end face of the protruding ring and the side face of the shell in a sealed mode, so that the sealing effect between the sealing ring and the shell is guaranteed, and meanwhile the assembling difficulty and precision requirements of the smoke exhaust connecting pipe and the sealing ring can be lowered. In addition, the convex ring and the sealing ring are arranged on the inner side of the shell. And the sealing ring is hidden on the inner side of the shell, so that the overall appearance effect of the whole machine can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water heaters, in particular to a gas water heater. Background Art

[0002] A gas water heater is a gas appliance that uses gas as fuel and transfers heat to cold water flowing through a heat exchanger through combustion heating to achieve the purpose of preparing hot water. It is deeply loved by users because of its advantages such as energy saving and ready to use.

[0003] With the improvement of people's living standards, consumers have higher and higher requirements for the noise of water heaters. In order to meet the needs of consumers, major manufacturers are adopting noise reduction technology. At present, major manufacturers mostly adopt passive noise reduction, which seals the noise in the shell so that the sound cannot be transmitted. The current structure on the market is basically to add a sealing ring between the shell and the smoke exhaust connection pipe to achieve shell sealing. Since there are many parts of the water heater and it is difficult to ensure consistency, the smoke exhaust connection pipe will generally have different degrees of eccentricity after the water heater is assembled. In the existing structure, the use of different installation processes makes the gas water heater have the defect that it is difficult to insert the sealing ring between the smoke exhaust connection pipe and the shell when installing it. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a gas water heater which can reduce the assembly difficulty and precision requirements of the smoke exhaust connection pipe and the sealing ring while ensuring the sealing effect. The above technical problem is solved by the following technical solution:

[0005] A gas water heater, comprising:

[0006] A smoke exhaust connecting pipe, wherein a convex ring is arranged on the circumferential surface of the smoke exhaust connecting pipe;

[0007] A housing, wherein the housing is provided with a mounting hole for the smoke exhaust connection pipe to pass through and extend out;

[0008] A sealing ring, sleeved and fixed on the convex ring;

[0009] The convex ring and the sealing ring are both located on the inner side of the outer shell, and the sealing ring is sealingly fitted with the end surface of the convex ring facing the outer shell and the inner wall of the outer shell.

[0010] The above-mentioned gas water heater is provided with a mounting hole on the shell to facilitate the installation of the smoke exhaust connection pipe, and part of the smoke exhaust connection pipe extends to the outside of the shell to discharge the smoke outside the shell through the smoke exhaust connection pipe. A convex ring is provided on the circumferential surface of the smoke exhaust connection pipe, so that the sealing ring is sleeved and fixed on the convex ring. The gas water heater provided by the present application is fixed by the sealing ring and the convex ring, so that when the smoke exhaust connection pipe is installed to the shell, the sealing ring is not easy to bend and detach, thereby avoiding the undesirable phenomenon of the sealing ring loosening; and the sealing ring is sealed with the end face of the convex ring and the inner wall of the shell, while ensuring the sealing effect between the sealing ring and the shell, the assembly difficulty and precision requirements of the smoke exhaust connection pipe and the sealing ring can be reduced. In addition, the convex ring and the sealing ring are both arranged on the inner side of the shell. The sealing ring is hidden inside the shell, thereby improving the overall appearance of the whole machine.

[0011] In one embodiment, the sealing ring includes interconnected:

[0012] A main body, fixedly connected to the end surface of the convex ring facing the outer shell, and the main body is pressed between the convex ring and the inner wall of the outer shell;

[0013] The peripheral side portion is sleeved and fixed on the outer peripheral surface of the convex ring.

[0014] In this way, by fixing the main body to the end face of the convex ring and sleeve-fixing the peripheral side of the sealing ring on the outer peripheral face of the convex ring, the contact area between the sealing ring and the smoke exhaust connection pipe can be increased to improve the reliability of the fixed connection between the sealing ring and the convex ring. The main body is pressed between the convex ring and the inner wall of the shell to ensure the sealing effect.

[0015] In one embodiment, a plurality of positioning posts are provided on the side of the main body facing the convex ring, a plurality of positioning holes corresponding to the positioning posts are provided on the convex ring, and the positioning posts are embedded in the positioning holes. In this way, the positioning posts are embedded in the positioning holes so as to be limited by the hole wall of the positioning holes, thereby achieving a fixed connection between the main body and the convex ring, thereby ensuring that after the smoke exhaust connection pipe is installed on the housing, the sealing ring will not fall off or loosen.

[0016] In one embodiment, the main body is provided with an avoidance hole for the smoke exhaust connection pipe to pass through, and a plurality of positioning posts are arranged around the periphery of the avoidance hole. In this way, the avoidance hole is used to avoid the smoke exhaust connection pipe when the sealing ring and the smoke exhaust connection pipe are installed, so that the smoke exhaust connection pipe can pass through; and the positioning posts are arranged around the periphery of the avoidance hole to facilitate the molding of the sealing ring. In addition, it is conducive to evenly arranging the positioning posts on the main body, thereby ensuring the balance of force on the main body, and thus preventing the sealing ring from deflecting.

[0017] In one embodiment, the convex ring and the smoke exhaust connection pipe are an integrated structure, which is conducive to simplifying the structure.

[0018] In one embodiment, the convex ring is an expansion joint, which is convenient for processing.

[0019] In one embodiment, the positioning hole passes through the side wall of the expansion joint close to the main body. Such a configuration is conducive to the formation of the positioning hole and facilitates the embedding of the positioning column on the side wall of the expansion joint, thereby ensuring the reliability of the connection between the sealing ring and the expansion joint.

[0020] In one embodiment, the gas water heater further comprises:

[0021] A fan assembly is arranged in the outer shell, and the fan assembly includes a fan housing. The fan housing is provided with a smoke collecting pipe connected to the inner cavity of the fan housing, and one end of the smoke exhaust connecting pipe is sleeved on the smoke collecting pipe and fixed to the smoke collecting pipe.

[0022] The fan assembly is used to provide the water heater with oxygen required for combustion and exhaust smoke after combustion. The smoke exhaust connection pipe is connected to the smoke collecting pipe on the fan housing so that the smoke accelerated by the fan can be discharged out of the housing through the smoke collecting pipe and the smoke exhaust connection pipe. Specifically, the smoke exhaust connection pipe is sleeved on the smoke collecting pipe and fixed to the smoke collecting pipe to improve the reliability of the connection between the smoke collecting pipe and the smoke exhaust connection pipe.

[0023] In one of the embodiments, a positioning platform is constructed at a position corresponding to the smoke collecting pipe on the fan housing;

[0024] The end surface of the positioning platform is arranged as a plane, and the end of the smoke exhaust connection pipe is butted against the end surface of the positioning platform.

[0025] With such an arrangement, the end of the smoke exhaust connecting pipe can be limited by the positioning platform on the fan casing, thereby improving the consistency of the installation of the smoke exhaust connecting pipe and the fan casing. It is also beneficial to ensure the sealing performance of the sealing ring on the outer casing when the smoke exhaust connecting pipe is connected to the fan casing and then installed with the outer casing.

[0026] In one embodiment, the smoke exhaust connection pipe is fixed to the fan housing by welding, so that the process is simple, the reliability is high, and the airtightness after connection can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] FIG1 is a schematic diagram of the internal structure of a gas water heater provided by an embodiment of the utility model;

[0028] FIG2 is a front view of the internal structure of a gas water heater provided by an embodiment of the utility model;

[0029] FIG3 is a side view of a gas water heater provided by an embodiment of the utility model;

[0030] FIG4 is a partial enlarged view of the connection portion between the smoke exhaust connection pipe and the shell of the gas water heater provided in one embodiment of the utility model;

[0031] FIG5 is a schematic structural diagram of a fan assembly of a gas water heater provided in one embodiment of the utility model;

[0032] FIG6 is a schematic diagram of the structure of a smoke exhaust connection pipe in a gas water heater provided in an embodiment of the utility model;

[0033] FIG7 is a side view of a smoke exhaust connection pipe in a gas water heater provided in an embodiment of the utility model;

[0034] Figure 8 A schematic diagram of the structure of a sealing ring in a gas water heater provided in one embodiment of the utility model;

[0035] FIG. 9 is a schematic structural diagram of a sealing ring in a gas water heater provided by an embodiment of the utility model from another perspective.

[0036] Reference numerals:

[0037] Shell 100; smoke exhaust connection pipe 200; convex ring 210; positioning hole 211; sealing ring 300; main body 310; positioning column 311; avoidance hole 312; peripheral side 320; fan assembly 400; fan housing 410; smoke collecting pipe 420; positioning platform 430. DETAILED DESCRIPTION

[0038] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying 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 the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0041] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean 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. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0043] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0044] The technical solution provided by the embodiments of the present application is described below in conjunction with the accompanying drawings.

[0045] Referring to Fig. 1 to Fig. 4, the utility model provides a gas water heater, which includes a smoke exhaust connection pipe 200, a shell 100 and a sealing ring 300. The smoke exhaust connection pipe 200 is used to discharge the smoke in the shell 100 out of the gas water heater. The sealing ring 300 is used to seal the connection between the smoke exhaust connection pipe 200 and the shell 100 to prevent the water droplets condensed on the outer wall of the smoke exhaust connection pipe 200 from flowing back into the shell 100 and damaging the parts in the shell 100. In addition, the sealing of the connection between the shell 100 and the smoke exhaust connection pipe 200 by the sealing ring 300 also has the function of noise reduction. The shell 100 has the function of connecting and supporting other parts of the gas water heater, and the shell 100 is a shell-type structure to define the outer contour of the gas water heater. The specific shape of the shell 100 is roughly square, and in other embodiments it can also be cylindrical.

[0046] As shown in Figures 3 to 6, in this embodiment, a convex ring 210 is provided on the circumferential surface of the smoke exhaust connecting pipe 200; the outer shell 100 is provided with a mounting hole for the smoke exhaust connecting pipe 200 to pass through and extend out; the sealing ring 300 is sleeved and fixed on the convex ring 210; the convex ring 210 and the sealing ring 300 are both located on the inner side of the outer shell 100, and the sealing ring 300 is sealed and fitted with the end surface of the convex ring 210 facing the outer shell 100 and the inner wall of the outer shell 100.

[0047] The above-mentioned gas water heater is provided with a mounting hole on the housing 100 so as to allow the smoke exhaust connection pipe 200 to pass through, and part of the smoke exhaust connection pipe 200 extends to the outside of the housing 100 so as to discharge the smoke out of the housing 100 through the smoke exhaust connection pipe 200. By providing a convex ring 210 on the circumferential surface of the smoke exhaust connection pipe 200, it is convenient to sleeve and fix the sealing ring 300 on the convex ring 210. The gas water heater provided by the present application is sleeved and fixed by the sealing ring 300 and the convex ring 210, so that when the smoke exhaust connection pipe 200 is installed on the housing 100, the sealing ring 300 is not easy to bend and detach, thereby avoiding the undesirable phenomenon of the sealing ring 300 being loose; and the sealing ring 300 is sealed and fitted with the end face of the convex ring 210 and the inner wall of the housing 100, while ensuring the sealing effect between the sealing ring 300 and the housing 100, the assembly difficulty and precision requirements of the smoke exhaust connection pipe 200 and the sealing ring 300 can be reduced. In addition, the convex ring 210 and the sealing ring 300 are both arranged on the inner side of the housing 100. The sealing ring 300 is hidden inside the housing 100, thereby improving the overall appearance of the whole device.

[0048] Specifically, the mounting hole is provided at the upper end of the housing 100, and the mounting hole can be integrally formed on the housing 100 by stamping. In this embodiment, the side surface corresponding to the periphery of the mounting hole on the housing 100 is a plane, so that after the smoke exhaust connection pipe 200 is installed in the mounting hole, the end surface of the sealing ring 300 can fit with the periphery corresponding to the mounting hole on the housing 100, thereby ensuring the sealing performance.

[0049] As shown in Figures 3, 4 and Figure 8 As shown in FIG. 9 , in one embodiment, the sealing ring 300 includes a main body 310 and a peripheral side portion 320 connected to each other. The main body 310 is fixedly connected to the end surface of the convex ring 210 facing the housing 100, and the main body 310 is pressed between the convex ring 210 and the inner wall of the housing 100; the peripheral side portion 320 is sleeved and fixed on the outer peripheral surface of the convex ring 210. In this way, by fixing the main body to the end surface of the convex ring 210 and sleeve-fixing the peripheral side portion 320 of the sealing ring 300 on the outer peripheral surface of the convex ring 210, the contact area between the sealing ring 300 and the smoke exhaust connection pipe 200 can be increased to improve the reliability of the fixed connection between the sealing ring 300 and the convex ring 210. The main body 310 is pressed between the convex ring 210 and the inner wall of the housing 100 to ensure the sealing effect.

[0050] In this embodiment, the main body 310 is a flat annular shape, the peripheral side portion 320 is a cylindrical structure, and the peripheral side portion 320 is fixedly connected to the outer edge of the main body 310. Of course, the main body 310 and the peripheral side portion 320 are an integrally formed rubber part. The inner side surface of the peripheral side portion 320 fits the outer peripheral surface of the convex ring 210. In order to improve the reliability of the connection between the peripheral side portion 320 and the outer peripheral surface of the convex ring 210, the peripheral side portion 320 can be tightly matched with the outer peripheral surface of the convex ring 210.

[0051] As shown in Figure 3 and Figure 4, Figure 8 As shown in FIG9 , specifically, a plurality of positioning posts 311 are provided on the side of the main body 310 facing the convex ring 210, and a plurality of positioning holes 211 corresponding to the positioning posts 311 are provided on the convex ring 210, and the positioning posts 311 are embedded in the positioning holes 211. In this way, the positioning posts 311 are embedded in the positioning holes 211, so that the positioning posts 311 are limited by the hole wall of the positioning holes 211, thereby realizing a fixed connection between the main body 310 and the convex ring 210, thereby ensuring that after the smoke exhaust connection pipe 200 is installed on the housing 100, the sealing ring 300 will not fall off or loosen.

[0052] The positioning post 311 can be set as a cylindrical structure or a prismatic structure. For example, the cross section of the positioning post 311 can be square, triangular, elliptical, etc. Preferably, the positioning post 311 adopts a cylindrical structure, which has a simple structure, is easy to process, and is easy to install.

[0053] like Figure 8 As shown in FIG9 , in one embodiment, a main body 310 is provided with an avoidance hole 312 for the smoke exhaust connection pipe 200 to pass through, and a plurality of positioning posts 311 are arranged around the periphery of the avoidance hole 312. In this way, the avoidance hole 312 is used to avoid the smoke exhaust connection pipe 200 when the sealing ring 300 and the smoke exhaust connection pipe 200 are installed, so that the smoke exhaust connection pipe 200 can pass through; and the positioning posts 311 are arranged around the periphery of the avoidance hole 312 to facilitate the molding of the sealing ring 300. In addition, it is conducive to evenly arranging the positioning posts 311 on the main body 310, thereby ensuring the balance of force on the main body 310, and thus preventing the sealing ring 300 from deflecting.

[0054] In this embodiment, a plurality of positioning posts 311 are arranged around the avoidance hole 312, and the connecting line of the plurality of positioning posts 311 is a concentric circle with the avoidance hole 312. There is no limitation on the number of positioning posts 311, and it can be three, four, etc. In this embodiment, four positioning posts 311 are arranged on the main body 310, and the four positioning posts 311 are evenly arranged on the main body 310.

[0055] As shown in FIG. 6 and FIG. 7 , in one embodiment, the convex ring 210 and the smoke exhaust connection pipe 200 are an integral structure. Such a configuration is conducive to simplifying the structure. Specifically, the convex ring 210 is an expansion joint. Such a configuration is conducive to processing. By forming the convex ring 210 on the smoke exhaust connection pipe 200 by an integral molding method, there is an advantage of reducing the difficulty of the process. Specifically, the smoke exhaust connection pipe 200 is expanded and then pierced to form an expansion joint.

[0056] Furthermore, the positioning hole 211 penetrates the side wall of the expansion joint close to the main body 310. Such a configuration is conducive to the formation of the positioning hole 211 and facilitates the embedding of the positioning column 311 on the side wall of the expansion joint, thereby ensuring the reliability of the connection between the sealing ring 300 and the expansion joint.

[0057] Specifically, the expansion joint may be punched to form a positioning hole 211 on the side wall of the expansion joint facing the housing 100. The specific shape of the positioning hole 211 matches the positioning column 311, and the size of the positioning hole 211 should be slightly smaller than the size of the positioning column 311, so that when installing, the positioning column 311 can be inserted into the positioning hole 211 by slightly applying force to the main body 310 of the sealing ring 300, so as to achieve mutual limitation between the positioning column 311 and the positioning hole 211.

[0058] As shown in Figures 1 to 5, in one embodiment, the gas water heater also includes a fan assembly 400, which is disposed in the outer shell 100. The fan assembly 400 includes a fan housing 410, and the fan housing 410 is configured with a smoke collecting pipe 420 that is connected to the inner cavity of the fan housing 410. One end of the smoke exhaust connecting pipe 200 is sleeved on the smoke collecting pipe 420 and fixed to the smoke collecting pipe 420.

[0059] The fan assembly 400 is used to provide the water heater with oxygen required for combustion and exhaust smoke after combustion. The smoke exhaust connection pipe 200 is connected to the smoke collecting pipe 420 on the fan housing 410, so that the smoke accelerated by the fan can be discharged outside the housing 100 through the smoke collecting pipe 420 and the smoke exhaust connection pipe 200. Specifically, the smoke exhaust connection pipe 200 is sleeved on the smoke collecting pipe 420 and fixed to the smoke collecting pipe 420 to improve the reliability of the connection between the smoke collecting pipe 420 and the smoke exhaust connection pipe 200.

[0060] The fan assembly 400 includes a fan wheel and a fan housing 410. The fan wheel is driven to rotate by a motor, so that under the joint action of the fan wheel and the fan housing 410, negative pressure is formed at the air inlet to inhale air, thereby providing the required oxygen for the water heater. At the same time, under the rotation of the fan wheel, the smoke after combustion is discharged from the smoke collecting pipe 420. In this embodiment, the diameter of the smoke exhaust connection pipe 200 is larger than the outer diameter of the smoke collecting pipe 420, so that the smoke exhaust pipe can just be sleeved on the smoke collecting pipe 420.

[0061] As shown in FIGS. 1 to 5 , in one embodiment, a positioning platform 430 is constructed at a position corresponding to the smoke collecting pipe 420 on the fan housing 410; the end surface of the positioning platform 430 is set as a plane, and the end of the smoke exhaust connecting pipe 200 is connected to the end surface of the positioning platform 430. In this way, the end of the smoke exhaust connecting pipe 200 can be limited by the positioning platform 430 on the fan housing 410, thereby improving the consistency of the installation of the smoke exhaust connecting pipe 200 and the fan housing 410, and it is also beneficial to ensure the sealing performance of the sealing ring 300 on the housing 100 when the smoke exhaust connecting pipe 200 is connected to the fan housing 410 and then installed with the housing 100.

[0062] Specifically, the periphery of the position on the fan housing 410 that is connected to the smoke collecting pipe 420 is set as a plane. After the smoke exhaust connecting pipe 200 is put on the smoke collecting pipe 420, the smoke exhaust connecting pipe 200 is pushed until the end face of the smoke exhaust connecting pipe 200 is connected to the plane of the positioning platform 430, indicating that the smoke exhaust connecting pipe 200 is installed in place.

[0063] In one embodiment, the smoke exhaust connection pipe 200 is fixed to the fan housing 410 by welding. In this way, the process is simple, the reliability is high, and the airtightness after connection can be guaranteed.

[0064] The gas water heater provided in this embodiment first sleeves the smoke exhaust connection pipe 200 onto the smoke collecting pipe 420 of the fan assembly 400, and then pushes the smoke exhaust connection pipe 200 until the end face of the smoke exhaust connection pipe 200 is in contact with the positioning platform 430 on the fan housing 410, and the smoke exhaust connection pipe 200 cannot continue to approach the fan assembly 400. Then the smoke exhaust connection pipe 200 and the fan housing 410 are fixedly connected by welding. Next, the sealing ring 300 is sleeved onto the smoke exhaust connection pipe 200, and the positioning column 311 on the sealing ring 300 is inserted into the positioning hole 211 on the smoke exhaust connection pipe 200. At this time, the side surface of the main body 310 fits with the end face of the convex ring 210, and the inner circumference of the peripheral side portion 320 fits with the outer circumference of the convex ring 210, so that the assembly of the sealing ring 300 and the smoke exhaust connection pipe 200 is completed. Then the fan assembly 400 with the smoke exhaust connection pipe 200 is installed in the housing 100. After installation, the main body 310 of the sealing ring 300 is pressed between the housing and the smoke exhaust connection pipe 200. In this way, it can be ensured that the sealing ring 300 is completely inside the housing, and when there is a deviation between the smoke exhaust connection pipe 200 and the installation hole of the housing, the assembly quality of the sealing ring 300 and the overall appearance of the whole machine can also be guaranteed.

[0065] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A gas water heater, characterized in that: The gas water heater comprises: A smoke exhaust connection pipe (200), wherein a convex ring (210) is provided on the circumferential surface of the smoke exhaust connection pipe (200); A housing (100), wherein the housing (100) is provided with a mounting hole for the smoke exhaust connection pipe (200) to pass through and extend out; A sealing ring (300) is sleeved and fixed on the convex ring (210); The convex ring (210) and the sealing ring (300) are both located on the inner side of the outer shell (100), and the sealing ring (300) is sealingly fitted to the end surface of the convex ring (210) facing the outer shell (100) and the inner wall of the outer shell (100).

2. The gas water heater according to claim 1, characterized in that: The sealing ring (300) comprises: A main body (310) is fixedly connected to the end surface of the convex ring (210) facing the outer shell (100), and the main body (310) is pressed between the convex ring (210) and the inner wall of the outer shell (100); The peripheral side portion (320) is sleeved on and fixed to the outer peripheral surface of the convex ring (210).

3. The gas water heater according to claim 2, characterized in that: A plurality of positioning posts (311) are arranged on the side of the main body (310) facing the convex ring (210), a plurality of positioning holes (211) corresponding to the positioning posts (311) are arranged on the convex ring (210), and the positioning posts (311) are embedded in the positioning holes (211).

4. The gas water heater according to claim 3, characterized in that: The main body (310) is provided with an avoidance hole (312) for the smoke exhaust connection pipe (200) to pass through, and a plurality of positioning columns (311) are arranged around the periphery of the avoidance hole (312).

5. The gas water heater according to claim 3, characterized in that: The convex ring (210) and the smoke exhaust connecting pipe (200) are an integral structure.

6. The gas water heater according to claim 5, characterized in that: The convex ring (210) is an expansion joint.

7. The gas water heater according to claim 6, characterized in that: The positioning hole (211) passes through a side wall of the expansion joint close to the main body (310).

8. The gas water heater according to any one of claims 1 to 7, characterized in that: The gas water heater also includes: A fan assembly (400), wherein the fan assembly (400) is arranged in the housing (100), and the fan assembly (400) comprises a fan housing (410), and a smoke collecting pipe (420) is constructed on the fan housing (410) and is connected to the inner cavity of the fan housing (410), and one end of the smoke exhaust connection pipe (200) is sleeved on the smoke collecting pipe (420) and fixed to the smoke collecting pipe (420).

9. The gas water heater according to claim 8, characterized in that: A positioning platform (430) is configured at a position on the fan housing (410) corresponding to the smoke collecting pipe (420); The end surface of the positioning platform (430) is arranged as a plane, and the end of the smoke exhaust connection pipe (200) is butted against the end surface of the positioning platform (430).

10. The gas water heater according to claim 8, characterized in that: The smoke exhaust connection pipe (200) is fixed to the fan housing (410) by welding.

Images