Combustion assembly for gas water heater and gas water heater
By designing the front panel frame, rear frame and inner lining frame in the combustion assembly of the gas water heater, and fixedly connecting it with the rear frame through the first pressing platform, the problems of combustion noise and vibration noise are solved, and the resonance noise of the inner lining is realized effective reduction.
Patent Information
- Application Number
- CN202420266552.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-02
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-02-02
Smart Images

Figure CN222459828U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of gas water heaters, and in particular relates to a combustion component for a gas water heater and a gas water heater. Background Art
[0002] At present, gas water heaters, also known as gas water heaters, are gas appliances that use gas as fuel and transfer energy to cold water flowing through a heat exchanger through combustion and heating to achieve the purpose of preparing hot water. Gas water heaters include structures such as burners, rear frames, and linings. When the burner of a gas water heater is burning, due to the shaking of the inner and outer flames, combustion noise and combustion roars will be generated. These sounds fluctuate periodically, causing the resonance of the lining, thereby generating vibration noise.
[0003] The existing Chinese patent with announcement number CN218955199U discloses a silent structure and a gas water heater, the silent structure includes: a bottom shell and a silencer box body, the opening of the silencer box body is connected to the inner wall of the bottom shell, the bottom shell and the silencer box body form a silencer cavity; the bottom shell is provided with an outlet connecting the inside and outside of the silencer cavity; the silencer box body is provided with an inlet connecting the inside and outside of the silencer cavity, and a reflective silencer plate is provided in the silencer cavity.
[0004] The above-mentioned gas water heater sets a reflective muffler in the muffler cavity, and the noise is reflected multiple times between the inner wall of the muffler cavity and the reflective muffler, thereby reducing the noise intensity. Finally, the noise is dissipated from the outlet on the bottom shell to the outside air to achieve a silent effect. However, it cannot fundamentally solve the noise problem caused by the resonance of the lining. In view of this, how to design a gas water heater technology that reduces the noise generated by the resonance of the lining is a technical problem to be solved by the utility model. Summary of the invention
[0005] The utility model provides a combustion component for a gas water heater and a gas water heater, which can reduce the noise generated by the resonance of the inner lining of the gas water heater.
[0006] In order to achieve the above technical objectives, the utility model adopts the following technical solutions:
[0007] In a first aspect, the utility model provides a combustion assembly for a gas water heater, comprising:
[0008] Front plate rack;
[0009] A rear frame, the rear frame is fixedly connected to the front plate frame and encloses the front plate frame to form a combustion chamber;
[0010] An inner liner frame, the inner liner frame being attached to the inner wall surface of the rear frame in the combustion chamber;
[0011] Wherein, a first profiling platform is formed in the middle of the liner frame, the bottom surface of the first profiling platform is in contact with the rear frame, and the first profiling platform is fixedly connected to the rear frame.
[0012] In some embodiments of the present application, positioning holes are provided at corresponding positions of the first profiling platform and the rear frame, and fasteners pass through the positioning holes to fix the first profiling platform and the rear frame together; or, the first profiling platform and the rear frame are fixedly connected by welding.
[0013] Positioning holes are provided at corresponding positions of the first corrugated platform and the rear frame, and fasteners are passed through the positioning holes to fix the first corrugated platform and the rear frame together, or the first corrugated platform and the rear frame are fixedly connected by welding, so that the liner frame and the rear frame can be fastened together, which is beneficial to improve the overall structural strength.
[0014] In some embodiments of the present application, the rear frame includes:
[0015] two side panels; and,
[0016] A rear plate connected between the two side plates;
[0017] Wherein, a second press-type platform is formed on the side plate and / or the rear plate.
[0018] The rear frame includes two side plates and a rear plate, the rear plate is connected between the two side plates, and a second profiled platform is formed on the side plates and / or the rear plate, so that the structural rigidity of the rear frame can be improved.
[0019] In some embodiments of the present application, the second pressing platform is in a strip shape or an arc shape.
[0020] By setting the second profiled platform to be strip-shaped or arc-shaped, the length of the second profiled platform is larger, which can increase the rigidity of the rear frame. The arc-shaped second profiled platform can not only increase the rigidity in the horizontal direction, but also has a reinforcing effect on the rigidity in the vertical direction.
[0021] In some embodiments of the present application, the second profiling platform is arranged along the horizontal direction.
[0022] By arranging the second pressing platform in the horizontal direction, the rigidity of the overall structure can be improved.
[0023] In some embodiments of the present application, a third press-formed platform is formed at the bottom of the liner frame, and the third press-formed platform is respectively abutted against the side panel and the rear panel.
[0024] By arranging a third press-formed platform at the bottom of the liner frame, the third press-formed platform is respectively in contact with the side plate and the rear plate, which improves the rigidity of the liner frame on the one hand and provides support for the liner frame on the other hand.
[0025] In some embodiments of the present application, the third profiling platform is clamped with the side panel.
[0026] By clamping the third profiled platform with the side plate, the connection strength between the liner frame and the rear frame can be improved.
[0027] In some embodiments of the present application, a mounting portion is provided on the upper portion of the side panel, and an avoidance protrusion is formed at a position on the third press platform corresponding to the mounting portion, and the avoidance protrusion is configured to avoid the mounting portion when installing the liner frame.
[0028] By providing an avoidance protrusion on the third profiling platform, the gap of the liner frame can be reduced, which is beneficial to improving the overall structural strength.
[0029] In some embodiments of the present application, a fourth press-type platform is formed on the upper portion of the liner frame;
[0030] And / or, a fifth pressing platform is formed on the front plate frame.
[0031] By forming a fourth corrugated platform on the upper part of the liner frame, the fourth corrugated platform can improve the overall structural strength of the liner frame and reduce the occurrence of resonance of the liner frame; by forming a fifth corrugated platform on the front plate frame, the fifth corrugated platform can improve the overall structural strength of the front plate frame and reduce the occurrence of resonance of the front plate frame.
[0032] In a second aspect, the utility model provides a gas water heater, comprising a combustion assembly for a gas water heater as described in any one of the embodiments of the first aspect.
[0033] Compared with the prior art, the advantages and positive effects of the utility model are: by arranging a front plate frame, a rear frame and an inner liner frame, the rear frame is fixedly connected to the front plate frame, the rear frame and the front plate frame enclose each other to form a combustion chamber, the inner liner frame is attached to the inner wall surface of the rear frame in the combustion chamber, a first corrugated platform is formed in the middle of the inner liner frame, the bottom surface of the first corrugated platform is abutted against the rear frame, and the first corrugated platform is fixedly connected to the rear frame, which improves the connection strength between the inner liner frame and the rear frame, thereby improving the overall structural strength of the inner liner frame and the rear frame, and can effectively reduce the vibration of the inner liner frame, thereby reducing noise from the source. BRIEF DESCRIPTION OF THE DRAWINGS
[0034] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0035] Figure 1 A structural schematic diagram of an embodiment of a combustion assembly for a gas water heater provided by the utility model;
[0036] Figure 2 A structural schematic diagram of another embodiment of a combustion assembly for a gas water heater provided by the utility model;
[0037] Figure 3 A top view of another embodiment of a combustion assembly for a gas water heater provided by the utility model;
[0038] Figure 4 for Figure 3 Cross-section along AA direction.
[0039] Description of reference numerals:
[0040] Front plate frame 1, fifth pressing platform 11;
[0041] The rear frame 2, the side plate 21, the rear plate 22, the second pressing platform 23, the claws 24, and the mounting portion 25;
[0042] The liner frame 3 , the first profiling platform 31 , the third profiling platform 32 , the avoidance protrusion 321 , the slot 322 , and the fourth profiling platform 33 . DETAILED DESCRIPTION
[0043] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0044] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0045] 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0046] In the present utility model, 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" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0047] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.
[0048] A gas water heater is a water heater that uses gas as the main energy material and transfers the high-temperature heat generated by gas combustion to cold water flowing through a heat exchanger to prepare hot water.
[0049] A gas water heater generally comprises a shell, and components such as a burner, a heat exchanger, a fan and a fan cover arranged in the shell.
[0050] The gas is transported to the burner and ignited by an ignition device, so that the burner burns the transported gas to generate heat.
[0051] A heat exchange tube is arranged in the heat exchanger, one end of the heat exchange tube is connected to the water supply pipeline, and the other end of the heat exchange tube is connected to a shower head or a faucet.
[0052] The heat generated by the burner burning gas is used to heat the heat exchange tubes, so that the water temperature in the heat exchange tubes is increased to form hot water.
[0053] When the gas water heater is working, cold water provided by the water supply pipeline flows into the heat exchange tube, and then is heated into hot water by the heating source generated by the burner, and then flows out from the shower or faucet through the hot water valve for user use.
[0054] At the same time, when the gas water heater is working, the fan is powered on and runs at the same time. Under the action of the fan, the smoke generated by the burner is discharged to the outside.
[0055] Gas water heaters include burners, combustion chambers, rear frames, and liner frames. When the burner is burning, the shaking of the inner and outer flames will produce oscillating combustion noise and combustion roars. These sounds and periodic pressure fluctuations will cause related components to resonate. The liner components have their own natural frequencies. The calculation method of the structural natural frequency is as follows:
[0056]
[0057] Among them, f is the natural frequency of the structure, k is the stiffness of the structure, and m is the effective mass of the structure.
[0058] It can be seen from this that the natural frequency is only related to mass and stiffness. When the effective mass of the structure is smaller, the natural frequency of the structure is larger and the anti-resonance performance is better; when the effective mass of the structure remains unchanged, the greater the stiffness of the structure, the larger the natural frequency of the structure, and the better the anti-resonance performance of the structure.
[0059] In the first aspect, combined Figures 1 to 4 As shown, the utility model provides a combustion assembly for a gas water heater, and the combustion assembly for a gas water heater comprises a front plate frame 1, a rear frame 2 and an inner lining frame 3.
[0060] The rear frame 2 is fixedly connected to the front plate frame 1, and the rear frame 2 and the front plate frame 1 enclose a combustion chamber;
[0061] The liner frame 3 is attached to the inner wall surface of the rear frame 2 in the combustion chamber;
[0062] Among them, a first corrugated platform 31 is formed in the middle part of the inner liner frame 3, and the first corrugated platform 31 protrudes from the outer wall surface of the inner liner frame 3 in the direction away from the combustion chamber. The bottom surface of the first corrugated platform 31 is in contact with the rear frame 2, and the first corrugated platform 31 is fixedly connected to the rear frame 2.
[0063] Specifically, the front frame 1 is a Z-shaped bending structure, and both ends of the rear frame 2 are adapted to the front frame 1 , and both ends of the rear frame 2 are fixedly connected to both ends of the front frame 1 by bolts.
[0064] Specifically, by setting the front plate frame 1, the rear frame 2 and the liner frame 3, the rear frame 2 is fixedly connected to the front plate frame 1, the rear frame 2 and the front plate frame 1 enclose a combustion chamber, and the liner frame 3 is attached to the inner wall surface of the rear frame 2 in the combustion chamber. A first corrugated platform 31 is formed in the middle of the liner frame 3, and the bottom surface of the first corrugated platform 31 is in contact with the rear frame 2, and the first corrugated platform 31 is fixedly connected to the rear frame 2. In this way, the vibration of the upper and lower ends of the liner frame 3 can be reduced, and the connection strength between the liner frame 3 and the rear frame 2 is improved, thereby improving the overall structural strength of the liner frame 3 and the rear frame 2, which can effectively reduce the vibration of the liner frame 3, thereby reducing noise from the source.
[0065] Specifically, the first profiling platform 31 is in a square, circular or rectangular shape, etc. It is understandable that the first profiling platform 31 includes but is not limited to the above types.
[0066] Specifically, the liner frame 3 is attached to the upper part of the rear frame 2, and there is a gap between the liner frame 3 and the rear frame 2, which is beneficial to improve the heat insulation effect and reduce the heat dissipation of the combustion chamber.
[0067] Combination Figure 1 As shown, in some embodiments of the present application, positioning holes are provided at corresponding positions of the first profiling platform 31 and the rear frame 2, and fasteners pass through the positioning holes to fix the first profiling platform 31 and the rear frame 2 together; or, the first profiling platform 31 and the rear frame 2 are fixedly connected by welding.
[0068] Specifically, positioning holes are set at corresponding positions of the first corrugation platform 31 and the rear frame 2, and fasteners pass through the positioning holes to fix the first corrugation platform 31 and the rear frame 2 together, or the first corrugation platform 31 and the rear frame 2 are fixedly connected by welding. In this way, the liner frame 3 and the rear frame 2 can be effectively fastened and connected, which is beneficial to improve the overall structural rigidity and reduce the noise generated by the liner frame due to vibration.
[0069] Exemplarily, the fasteners include bolts, screws, rivets, etc.
[0070] Combination Figure 1 and Figure 2As shown, in some embodiments of the present application, the rear frame 2 includes two side panels 21 and a rear panel 22. The two side panels 21 are arranged opposite to each other, and the rear panel 22 is connected between the two side panels 21. Specifically, the two ends of the rear panel 22 are fixedly connected to the two ends of the two side panels 21 respectively;
[0071] A second pressing platform 23 is formed on the side plate 21 and / or the rear plate 22 .
[0072] Specifically, the rear frame 2 includes two side panels 21 and a rear panel 22, and the rear panel 22 is connected between the two side panels 21, so that the two side panels 21 and the rear panel 22 form a U-shaped or C-shaped structure, and a second press-type platform 23 is formed on the side panels 21 and / or the rear panel 22. In this way, the rear frame 2 is not easily deformed, and the structural rigidity of the rear frame 2 can be improved, which is beneficial to increase the natural frequency of the rear frame 2 and reduce the resonance of the rear frame 2.
[0073] It should be noted that the number of the second profiling platforms 23 on the side plate 21 and / or the rear plate 22 can be set according to actual needs.
[0074] Exemplarily, two second press-forming platforms 23 are provided on the side plate 21 , and one second press-forming platform 23 is provided on the rear plate 22 .
[0075] In some embodiments of the present application, the second profiling platform 23 is in a strip shape or an arc shape.
[0076] Specifically, by configuring the second profiling platform 23 to be strip-shaped or arc-shaped, the second profiling platform 23 has a larger length and can cover a larger area on the surface of the side panels and / or the rear panel, thereby increasing the structural rigidity of the rear frame 2 .
[0077] The strip-shaped second profiled platform can increase the rigidity in the horizontal direction; and the arc-shaped second profiled platform 23 can not only increase the rigidity in the horizontal direction, but also has a reinforcing effect on the rigidity in the vertical direction.
[0078] In other embodiments of the present application, the second press-forming platform 23 protrudes from the outer wall surface of the rear frame 2 in a direction away from the inner liner frame 3 , and / or the second press-forming platform 23 protrudes from the inner wall surface of the rear frame 2 in a direction close to the inner liner frame 3 .
[0079] Specifically, by configuring the second profiling platform 23 to protrude from the outer wall surface of the rear frame 2 in a direction away from the liner frame 3 , the distance between the second profiling platform 23 and the liner frame 3 can be increased, thereby improving the heat insulation effect of the liner frame 3 .
[0080] In some embodiments of the present application, the second profiling platform 23 is arranged along the horizontal direction.
[0081] Specifically, by arranging the second profiling platform 23 in the horizontal direction, the second profiling platform 23 can be arranged around the combustion chamber, which is beneficial to improving the overall structural rigidity of the rear frame.
[0082] Combination Figure 3 and Figure 4 As shown, in some embodiments of the present application, a third press-formed platform 32 is formed at the bottom of the liner frame 3, and the third press-formed platform 32 is respectively abutted against the side plate 21 and the rear plate 22.
[0083] Specifically, by setting a third corrugated platform 32 at the bottom of the liner frame 3, the third corrugated platform 32 is respectively abutted against the side panel 21 and the rear panel 22, which on the one hand improves the rigidity of the liner frame 3, and on the other hand, increases the contact area between the liner frame 3 and the rear frame 2, thereby improving the stability and providing support for the liner frame 3.
[0084] In some embodiments of the present application, the third pressing platform 32 is clamped with the side plate 21 .
[0085] Specifically, by clamping the third profiling platform 32 and the side plate 21, the connection strength between the liner frame 3 and the rear frame 2 can be improved. The clamping method is relatively simple and convenient for production, manufacturing and installation.
[0086] Exemplarily, a claw 24 is provided on the side plate 21 facing the combustion chamber, and a slot 322 is provided on the third profiling platform 32 at a position corresponding to the claw 24 , and the claw 24 is clamped in the slot 322 , so that the liner frame 3 is clamped with the bottom end of the rear frame 2 .
[0087] Specifically, each side plate 21 is provided with two clamping claws 24 , and correspondingly, the third pressing platform 32 on the rear frame 2 is provided with two clamping grooves 322 , and the number of the clamping claws 24 can be set according to actual needs.
[0088] It should be noted that the clamping forms between the liner frame 3 and the side panel 21 include but are not limited to the above-mentioned forms.
[0089] In certain embodiments of the present application, a mounting portion 25 is provided on the upper portion of the side panel 21, and an avoidance protrusion 321 is formed at a position corresponding to the mounting portion 25 on the third press platform 32, and the avoidance protrusion 321 is configured to avoid the mounting portion 25 when installing the liner frame 3.
[0090] Specifically, by providing the avoidance protrusion 321 on the third profiling platform 32, the gap or opening rate of the liner frame 3 can be reduced, which is beneficial to improving the overall structural strength.
[0091] Exemplarily, the avoiding protrusion 321 and the locking groove 322 are arranged at a distance.
[0092] In some embodiments of the present application, a fourth press platform 33 is formed on the upper portion of the liner frame 3 .
[0093] Specifically, by arranging the fourth press-forming platform 33 on the upper part of the liner frame 3 , the fourth press-forming platform 33 can improve the structural strength of the liner frame 3 , increase the natural frequency of the liner frame 3 , and reduce the occurrence of resonance of the liner frame 3 .
[0094] Specifically, the fourth profiling platform 33 is strip-shaped or arc-shaped, and the fourth profiling platform is arranged along the horizontal direction of the liner frame 3 .
[0095] In some embodiments of the present application, a fifth profiling platform 11 is formed on the front plate frame 1 .
[0096] Specifically, by forming the fifth pressing platform 11 on the front frame 1 , it is beneficial to improve the structural rigidity of the front frame 1 , thereby increasing the natural frequency of the front frame 1 and reducing the occurrence of resonance of the front frame 1 .
[0097] Specifically, the fifth profiling platform 11 is strip-shaped or arc-shaped, and the fifth profiling platform 11 is arranged along the horizontal direction of the front panel frame 1 .
[0098] In a second aspect, the utility model provides a gas water heater, comprising a combustion assembly for a gas water heater as in any one of the embodiments of the first aspect. Since the combustion assembly for a gas water heater as in any one of the embodiments is included, the combustion assembly has all the beneficial effects of the combustion assembly for a gas water heater as in any one of the embodiments, which will not be described in detail here.
[0099] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.
[0100] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the above embodiments, or to replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.
Claims
1. A combustion assembly for a gas water heater, characterized in that: include: Front plate rack; A rear frame, the rear frame is fixedly connected to the front plate frame and encloses the front plate frame to form a combustion chamber; An inner liner frame, the inner liner frame being attached to the inner wall surface of the rear frame in the combustion chamber; Wherein, a first profiling platform is formed in the middle of the liner frame, the bottom surface of the first profiling platform is in contact with the rear frame, and the first profiling platform is fixedly connected to the rear frame.
2. The combustion assembly for a gas water heater according to claim 1, characterized in that: Positioning holes are provided at corresponding positions of the first profiling platform and the rear frame, and fasteners pass through the positioning holes to fix the first profiling platform and the rear frame together; or, the first profiling platform and the rear frame are fixedly connected by welding.
3. The combustion assembly for a gas water heater according to claim 1, characterized in that: The rear frame comprises: two side panels; and, A rear plate connected between the two side plates; Wherein, a second press-type platform is formed on the side plate and / or the rear plate.
4. The combustion assembly for a gas water heater according to claim 3, characterized in that: The second pressing platform is in a strip shape or an arc shape.
5. The combustion assembly for a gas water heater according to claim 3, characterized in that: The second pressing platform is arranged along the horizontal direction.
6. The combustion assembly for a gas water heater according to claim 3, characterized in that: A third press-type platform is formed at the bottom of the liner frame, and the third press-type platform is respectively abutted against the side plate and the rear plate.
7. The combustion assembly for a gas water heater according to claim 6, characterized in that: The third pressing platform is clamped with the side plate.
8. The combustion assembly for a gas water heater according to claim 6, characterized in that: A mounting portion is provided on the upper portion of the side plate, and an avoidance protrusion is formed on the third press platform at a position corresponding to the mounting portion, and the avoidance protrusion is configured to avoid the mounting portion when the liner frame is installed.
9. The combustion assembly for a gas water heater according to claim 1, characterized in that: A fourth press-type platform is formed on the upper part of the liner frame; And / or, a fifth pressing platform is formed on the front plate frame.
10. A gas water heater, characterized in that: The invention comprises a combustion assembly for a gas water heater as claimed in any one of claims 1 to 9.
Citation Information
Patent Citations
Mute structure and gas water heater
CN218955199U