Gas water heater

Abstract

The gas water heater comprises a water heater body, a controller shell with a control bottom wall, a first limiting structure and a second limiting structure, the water heater body comprises a water heater shell with a shell bottom wall and a combustion chamber, and the control bottom wall is connected with the shell bottom wall in a clamped mode so as to limit the position of the controller shell in the first direction; the first limiting structure and the second limiting structure protrude out of the bottom of the combustion chamber and are sequentially arranged in the second direction, and the first limiting structure and the second limiting structure jointly limit the position of the controller shell in the second direction; the bottom wall of the shell and the first limiting structure jointly limit the position of the controller shell in the third direction. The control bottom wall is connected with the bottom wall of the shell in a clamped mode, so that the controller shell is convenient to disassemble and assemble, the production efficiency of the gas water heater can be improved, maintenance is convenient, and cost is saved; by arranging the first limiting structure and the second limiting structure, the position of the controller shell relative to the water heater body can be limited, and therefore the controller shell is positioned.

Description

Technical Field

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

[0002] A gas water heater, also known as a gas water boiler, 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. With the development of intelligent control of gas water heaters, its electrical control technology has also been gradually improved. The controller, as its core component, generally includes a controller housing, a circuit board, and a wiring harness. The circuit board is set in the controller housing, and the wiring harness is plugged into the interface of the circuit board. During installation, screws are usually used to fix the controller housing in the burner bottom shell, thereby installing and fixing the controller. However, the above installation method is likely to result in low production efficiency and unchanged maintenance. Summary of the invention

[0003] Based on this, it is necessary to provide a gas water heater that can improve production efficiency, is easy to maintain, and saves costs.

[0004] A gas water heater, comprising:

[0005] A water heater body, the water heater body comprising a water heater shell and a combustion chamber arranged in the water heater shell, the water heater shell having a shell bottom wall;

[0006] A controller housing, the controller housing having a control bottom wall, the control bottom wall being snap-connected to the housing bottom wall to limit the position of the controller housing in a first direction;

[0007] The first limiting structure and the second limiting structure are both protruding from the bottom of the combustion chamber and are arranged successively along the second direction, and the first limiting structure and the second limiting structure jointly limit the position of the controller housing in the second direction;

[0008] The shell bottom wall and the first limiting structure jointly limit the position of the controller housing in a third direction; the first direction, the second direction and the third direction are perpendicular to each other.

[0009] In the above scheme, by connecting the control bottom wall with the bottom wall of the shell body by snap-fitting, the installation is convenient and quick, and the installation and disassembly of the controller shell is convenient, which can improve the production efficiency of the gas water heater. When the display controller needs to be repaired, there is no need to disassemble the main body of the gas water heater. It is only necessary to remove the controller shell from the water heater body to facilitate the repair of the controller. After the controller is damaged, it is sufficient to replace it with a new controller without replacing a new gas water heater, thus saving costs. By setting the first limiting structure and the second limiting structure, the position of the controller shell relative to the water heater body in the first direction, the second direction and the third direction can be limited, so as to position the controller shell and prevent the controller shell from falling off the water heater body.

[0010] In one of the embodiments, a fixing boss is protruded from the outer side of the control bottom wall, a slot is provided on the fixing boss, and an insert piece that is engaged with the slot is provided on the inner side of the bottom wall of the shell.

[0011] By providing a slot and a plug-in piece that fits the slot, the bottom wall of the shell can be connected to the controller housing, thereby enabling the installation of the controller housing. The structure is simple, and installation and disassembly are relatively quick, which can improve the production efficiency of the gas water heater.

[0012] In one embodiment, the insert includes a first bent portion connected to the bottom wall of the shell and a second bent portion connected to the first bent portion, the extension direction of the first bent portion and the extension direction of the second bent portion are perpendicular to each other, and the second bent portion is used to be plugged into and matched with the slot (510).

[0013] In one embodiment, the first limiting structure includes an extension portion protruding from the bottom of the combustion chamber, and a limiting block protruding from the controller housing. When the controller housing is installed, the extension portion is located behind the installation direction of the limiting block and abuts against the side wall of the limiting block.

[0014] In one of the embodiments, the second limiting structure includes a limiting boss protruding from the bottom of the combustion chamber. When the controller housing is installed, the limiting boss is located at the rear of the controller housing and abuts against the side wall of the controller housing.

[0015] In one embodiment, the limit block has an abutment surface away from the control side wall and an inclined surface arranged opposite to the abutment surface. When the controller housing is installed, the abutment surface abuts against the side wall of the protruding portion, and the inclined surface is located between the limit boss and the protruding portion.

[0016] By providing the inclined surface, the installation of the controller housing can be facilitated.

[0017] In one of the embodiments, the inclination angle between the inclined surface and the upper surface of the limiting block is greater than 0° and less than or equal to 45°.

[0018] The present application does not limit the inclination angle α between the inclined surface and the upper surface of the limit block. The inclination angle α between the inclined surface and the upper surface of the limit block should not be too large, otherwise the controller housing will be subject to greater resistance during installation. The inclination angle α between the inclined surface and the upper surface of the limit block should not be too small, otherwise the connection between the controller housing and the water heater housing will not be tight, causing the controller housing to loosen and lose the limiting function.

[0019] In one of the embodiments, when the controller housing is in an installed state, the extension portion abuts against the top of the controller housing;

[0020] And / or, the limit block is arranged on the top of the controller housing and abuts against the bottom of the combustion chamber.

[0021] In one embodiment, the gas water heater has at least one of the following features:

[0022] The fixing bosses include two, and the two fixing bosses are arranged at intervals on the outer side of the control bottom wall;

[0023] The inserts include two, and the two inserts are spaced apart and arranged on the inner side of the bottom wall of the housing;

[0024] The limit blocks include two, and the two limit blocks are spaced apart and arranged on the top of the controller housing.

[0025] In one of the embodiments, the protruding portion is disposed on the bottom wall of the combustion chamber or the protruding portion is disposed on a side plate of the combustion chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application.

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] FIG1 is a front structural diagram of a gas water heater shown in an embodiment of the utility model.

[0029] FIG. 2 is a left-side structural diagram of a gas water heater shown in an embodiment of the present utility model.

[0030] FIG3 is an enlarged view of point A in FIG2 .

[0031] FIG. 4 is a schematic diagram of the connection structure of the combustion bottom wall and the limiting boss shown in an embodiment of the present utility model.

[0032] FIG. 5 is a schematic structural diagram of a controller housing, a limiting structure and a fixing boss shown in an embodiment of the present invention.

[0033] FIG. 6 is a schematic diagram of the connection structure of the insert and the bottom wall of the housing shown in an embodiment of the present invention.

[0034] Figure 7 The figure is a cross-sectional structural diagram of a controller housing according to an embodiment of the present invention.

[0035] Figure 8 for Figure 7 Enlarged view of center C.

[0036] Fig. 9 for Figure 7 Enlarged view of point B in the middle.

[0037] Fig.10 It is a left side view of the connection structure of the insert and the bottom wall of the shell shown in one embodiment of the utility model.

[0038] Fig.11 The figure is a schematic structural diagram of a gas water heater shown in one embodiment of the utility model.

[0039] Description of Reference Numerals

[0040] 10. Gas water heater; 100. Water heater body; 110. Water heater shell; 111. Shell bottom wall; 120. Combustion chamber; 121. Combustion side wall; 122. Combustion bottom wall; 200. Controller shell; 210. Control bottom wall; 220. Control top wall; 230. Control side wall; 300. First limiting structure; 310. Extension; 320. Limit block; 321. Abutment surface; 322. Inclined surface; 400. Second limiting structure; 500. Fixed boss; 510. Slot; 600. Insert; 610. First bending portion; 620. Second bending portion; 700. Circuit board; 800. Wiring harness interface. DETAILED DESCRIPTION

[0041] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application 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 present application. However, the present application 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 present application, so the present application is not limited by the specific embodiments disclosed below.

[0042] In the description of the present application, it should be understood that if 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", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0043] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0044] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated 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 this application can be understood according to the specific circumstances.

[0045] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the 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. The first feature being "below", "below" and "below" the 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.

[0046] It should be noted that if 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. If 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. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0047] Please refer to Figures 1 and 2. An embodiment of the present application provides a gas water heater 10, including a water heater body 100, a controller housing 200, a first limiting structure 300 and a second limiting structure 400. The controller housing 200 is detachably connected to the water heater body 100, which can facilitate the installation and disassembly of the controller housing 200.

[0048] The water heater body 100 includes a water heater housing 110 and a combustion chamber 120 disposed in the water heater housing 110, and the water heater housing 110 has a housing bottom wall 111. The combustion chamber 120 has a combustion side wall 121 and a combustion bottom wall 122. Specifically, the water heater housing 110 has a front side and a back side. In this embodiment, the combustion side wall 121 of the combustion chamber 120 is disposed toward the front side of the water heater housing 110.

[0049] Please refer to Figure 1, Figure 2 and Fig.11 The controller housing 200 has a control bottom wall 210, a control top wall 220 and a control side wall 230 arranged between the control bottom wall 210 and the control top wall 220. The control bottom wall 210 is snap-connected to the shell bottom wall 111 to limit the position of the controller housing 200 in the first direction X.

[0050] The first limiting structure 300 and the second limiting structure 400 are both arranged protruding from the bottom of the combustion chamber 120 and are arranged successively along the second direction Y. The first limiting structure 300 and the second limiting structure 400 jointly limit the position of the controller housing 200 in the second direction Y. The housing bottom wall 111 and the first limiting structure 300 jointly limit the position of the controller housing 200 in the third direction Z. The first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0051] By snap-connecting the control bottom wall 210 with the shell bottom wall 111, the installation is convenient and quick, and the installation and disassembly of the controller housing 200 are convenient, which can improve the production efficiency of the gas water heater 10. When the display controller needs to be repaired, there is no need to disassemble the main body of the gas water heater 10. Only the controller housing 200 needs to be removed from the water heater body 100, so as to facilitate the repair of the controller. After the controller is damaged, a new controller can be replaced without replacing a new gas water heater 10, thereby saving costs. By setting the first limiting structure 300 and the second limiting structure 400, the position of the controller housing 200 relative to the water heater body 100 in the first direction X, the second direction Y and the third direction Z can be limited, so as to position the controller housing 200 and prevent the controller housing 200 from falling off the water heater body 100.

[0052] The gas water heater 10 according to the embodiment of the utility model will be described in detail below with reference to the accompanying drawings.

[0053] Please refer to FIG. 1, FIG. 2 and FIG. 6. According to some embodiments of the present application, optionally, a fixing boss 500 is formed on the outer side of the control bottom wall 210, and a slot 510 is provided on the fixing boss 500. A plug-in piece 600 that is matched and engaged with the slot 510 is provided on the inner side of the housing bottom wall 111. By providing the slot 510 and the plug-in piece 600 that is matched and engaged with the slot 510, the housing bottom wall 111 and the controller housing 200 can be connected, so that the controller housing 200 can be installed, and the structure is simple, and the installation and disassembly are relatively fast, which can improve the production efficiency of the gas water heater 10.

[0054] Specifically, there are two fixing bosses 500, and the two fixing bosses 500 are spaced apart on the outer side of the control bottom wall 210. Each fixing boss 500 is provided with a slot 510. Correspondingly, there are two inserting pieces 600, and the two inserting pieces 600 are spaced apart on the inner side of the housing bottom wall 111. By providing two slots 510 and two inserting pieces 600, the connection between the housing bottom wall 111 and the controller housing 200 can be made tighter.

[0055] It should be noted that the spacing between the two slots 510 is not limited in this application and can be set according to actual needs. In this embodiment, the fixed boss 500 and the control bottom wall 210 are an integrally formed structure to ensure the connection strength between the fixed boss 500 and the control bottom wall 210. In other embodiments, the fixed boss 500 can also be welded or bonded to the control bottom wall 210.

[0056] Please refer to FIG. 1 , FIG. 2 and FIG. 6 , according to some embodiments of the present application, optionally, the insert 600 includes a first bending portion 610 connected to the bottom wall 111 of the housing and a second bending portion 620 connected to the first bending portion 610, and the extension direction of the first bending portion 610 and the extension direction of the second bending portion 620 are perpendicular to each other. The second bending portion 620 is used for plugging and matching with the slot 510. The free end of the second bending portion 620 faces the outside of the water heater housing 110.

[0057] Specifically, the extension direction of the first bending portion 610 is the height direction of the water heater housing 110 . The extension direction of the second bending portion 620 is parallel to the second direction Y. Correspondingly, the slot 510 is provided on the side wall of the fixing boss 500 .

[0058] In this embodiment, the inserting piece 600 and the bottom wall 111 of the housing are integrally formed to ensure the connection strength between the inserting piece 600 and the bottom wall 111 of the housing. In other embodiments, the inserting piece 600 may also be welded or bonded to the bottom wall 111 of the housing.

[0059] Please refer to Figures 1, 2 and 6. According to some embodiments of the present application, optionally, the second limiting structure 400 includes a limiting boss protruding from the bottom of the combustion chamber 120. When the controller housing 200 is in the installed state, the limiting boss is located at the rear of the controller housing 200 and abuts against the side wall of the controller housing 200.

[0060] Specifically, the limiting boss is disposed on the combustion bottom wall 122, and the limiting boss can abut against the control side wall 230 to limit the position of the control side wall 230 relative to the combustion bottom wall 122. When the controller housing 200 is installed, the control side wall 230 is disposed toward the back of the water heater housing 110.

[0061] More specifically, the limiting boss is formed protruding from the combustion bottom wall 122. In this embodiment, the limiting boss and the combustion bottom wall 122 are an integrally formed structure to ensure the connection strength between the limiting boss and the combustion bottom wall 122.

[0062] In other embodiments, the limiting boss may also be welded or bonded to the combustion bottom wall 122. The limiting boss may also be arranged on the combustion bottom wall 122 in an adjustable manner to accommodate controller housings 200 of different sizes.

[0063] Referring to FIG. 1 , FIG. 2 and FIG. 6 , according to some embodiments of the present application, optionally, the first limiting structure 300 includes an extension portion 310 disposed protruding from the bottom of the combustion chamber (120), and a limiting block 320 disposed protruding from the controller housing 200. When the controller housing 200 is installed, the extension portion 310 is located behind the installation direction of the limiting block 320 and abuts against the side wall of the limiting block 320 to limit the position of the controller housing 200 relative to the combustion chamber (120). Specifically, the limiting block 320 includes two, and the two limiting blocks 320 are spaced apart and disposed on the control top wall 220.

[0064] The extension portion 310 may be disposed on the bottom wall of the combustion chamber 120, that is, the extension portion 310 is disposed on the combustion bottom wall 122. The extension portion 310 may also be disposed on the side plate of the combustion chamber 120. That is, the extension portion 310 is disposed on the combustion side wall 121 and extends out of the combustion bottom wall 122. In this embodiment, the extension portion 310 is disposed on the combustion side wall 121 and extends out of the combustion bottom wall 122.

[0065] Referring to FIG. 1 , FIG. 2 and FIG. 6 , according to some embodiments of the present application, optionally, in the installed state of the controller housing 200, the extension portion 310 abuts against the top of the controller housing 200 to fix the position of the controller housing 200. The limit block 320 is disposed at the top of the controller housing 200 and abuts against the bottom of the combustion chamber 120 to fix the position of the controller housing 200. More specifically, the extension portion 310 abuts against the control top wall 220, and the limit block 320 abuts against the combustion bottom wall 122.

[0066] An installation space is formed between the combustion bottom wall 122 and the extension part 310, and the limiting block 320 can be inserted into the installation space and abut against the side wall of the extension part 310. Specifically, the combustion bottom wall 122, the extension part 310 and the limiting boss are jointly arranged to form the installation space.

[0067] It should be understood that: during installation, the insert piece 600 on the inner side of the bottom wall 111 of the housing is aligned with the slot 510 on the fixing boss 500 and inserted. During the insertion process, the stopper 320 moves along the installation direction so that the stopper 320 is inserted into the installation space, and the stopper 320 can be abutted against the side wall of the extension 310 to limit the position of the control top wall 220 relative to the combustion side wall 121. At the same time, the control side wall 230 moves in the direction close to the stopper boss, and the stopper boss can abut against the control side wall 230 to limit the position of the control side wall 230 relative to the combustion bottom wall 122, thereby positioning the controller housing 200 to prevent the controller housing 200 from falling off the water heater body 100. In this embodiment, the installation direction is the direction from the front of the water heater housing 110 to the back of the water heater housing 110.

[0068] Referring to FIG. 1 , FIG. 2 and FIG. 6 , according to some embodiments of the present application, optionally, the limit block 320 has a contact surface 321 and an inclined surface 322 disposed away from the contact surface 321. When the controller housing 200 is installed, the contact surface 321 contacts the side wall of the extension portion 310, and the inclined surface 322 is located between the limit boss and the extension portion 310. The inclined surface 322 is obliquely connected between the upper surface of the limit block 320 and the control top wall 220.

[0069] By providing the inclined surface 322, it is convenient to insert the limit block 320 into the installation space, thereby facilitating the installation of the controller housing 200. Specifically, the abutting surface 321 is located at the rear of the installation direction, and the inclined surface 322 is located at the front of the installation direction.

[0070] Please refer to FIG. 1 , FIG. 2 and FIG. 6 . According to some embodiments of the present application, optionally, an inclination angle α between the inclined surface 322 and the upper surface of the limiting block 320 is greater than 0° and less than or equal to 45°.

[0071] It should be understood that: the present application does not limit the inclination angle α between the inclined surface 322 and the upper surface of the limit block 320. The inclination angle α between the inclined surface 322 and the upper surface of the limit block 320 should not be too large, otherwise the controller housing 200 will be subject to greater resistance during installation. The inclination angle α between the inclined surface 322 and the upper surface of the limit block 320 should not be too small, otherwise the connection between the controller housing 200 and the water heater housing 110 will not be tight, causing the controller housing 200 to loosen and lose the limiting function. Exemplarily, the inclination angle α between the inclined surface 322 and the upper surface of the limit block 320 is 45°.

[0072] Referring to FIG. 1 , FIG. 2 and FIG. 6 , according to some embodiments of the present application, optionally, a circuit board 700 is disposed in the controller housing 200, and a wiring harness interface 800 for connecting with a wiring harness is disposed on the circuit board 700, and the wiring harness interface 800 faces the side away from the control side wall 230. Specifically, the wiring harness interface 800 is disposed toward the front of the water heater housing 110, which can facilitate plugging and unplugging of the wiring harness during debugging.

[0073] 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.

[0074] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A gas water heater, characterized in that: include: A water heater body (100), the water heater body (100) comprising a water heater shell (110) and a combustion chamber (120) arranged in the water heater shell (110), the water heater shell (110) having a shell bottom wall (111); A controller housing (200), the controller housing (200) having a control bottom wall (210), the control bottom wall (210) being snap-connected to the housing bottom wall (111) to limit the position of the controller housing (200) in a first direction; A first limiting structure (300) and a second limiting structure (400) are both arranged protruding from the bottom of the combustion chamber (120) and are arranged successively along the second direction, and the first limiting structure (300) and the second limiting structure (400) jointly limit the position of the controller housing (200) in the second direction; The shell bottom wall (111) and the first limiting structure (300) jointly limit the position of the controller housing (200) in a third direction; the first direction, the second direction and the third direction are perpendicular to each other.

2. The gas water heater according to claim 1, characterized in that: A fixing boss (500) is protruded on the outer side of the control bottom wall (210), a slot (510) is provided on the fixing boss (500), and an inserting piece (600) which is matched and snap-fitted with the slot (510) is provided on the inner side of the shell bottom wall (111).

3. The gas water heater according to claim 2, characterized in that: The insert (600) comprises a first bent portion (610) connected to the bottom wall (111) of the shell and a second bent portion (620) connected to the first bent portion (610); an extension direction of the first bent portion (610) and an extension direction of the second bent portion (620) are perpendicular to each other; the second bent portion (620) is used for plugging and mating with the slot (510).

4. The gas water heater according to claim 2, characterized in that: The first limiting structure (300) comprises a protruding portion (310) protruding from the bottom of the combustion chamber (120), and a limiting block (320) protruding from the controller housing (200); when the controller housing (200) is installed, the protruding portion (310) is located behind the limiting block (320) in the installation direction and abuts against the side wall of the limiting block (320).

5. The gas water heater according to claim 4, characterized in that: The second limiting structure (400) comprises a limiting boss protruding from the bottom of the combustion chamber (120); when the controller housing (200) is installed, the limiting boss is located behind the controller housing (200) and abuts against a side wall of the controller housing (200).

6. The gas water heater according to claim 5, characterized in that: The limit block (320) comprises a contact surface (321) and an inclined surface (322) arranged opposite to the contact surface (321); when the controller housing (200) is installed, the contact surface (321) contacts the side wall of the extending portion (310), and the inclined surface (322) is located between the limit boss and the extending portion (310).

7. The gas water heater according to claim 6, characterized in that: The inclination angle between the inclined surface (322) and the upper surface of the limiting block (320) is greater than 0° and less than or equal to 45°.

8. The gas water heater according to claim 4, characterized in that: When the controller housing (200) is in an installed state, the extension portion (310) abuts against the top of the controller housing (200); And / or, the limit block (320) is arranged on the top of the controller housing (200) and abuts against the bottom of the combustion chamber (120).

9. The gas water heater according to claim 4, characterized in that: The gas water heater has at least one of the following features: The fixing bosses (500) include two, and the two fixing bosses (500) are arranged at intervals on the outer side of the control bottom wall (210); The inserting pieces (600) include two, and the two inserting pieces (600) are arranged at intervals on the inner side of the bottom wall (111) of the housing; The limit blocks (320) include two, and the two limit blocks (320) are arranged at intervals on the top of the controller housing (200).

10. The gas water heater according to claim 4, characterized in that: The protruding portion (310) is arranged on the bottom wall of the combustion chamber (120) or the protruding portion (310) is arranged on the side plate of the combustion chamber (120).

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