Gas water heater and housing assembly therefor

Abstract

This invention relates to a gas water heater and its casing assembly. On one hand, the air inlet and the first air outlet are staggered. This elongates the propagation path of the composite noise after it passes through the chamber, unlike the straight-in-straight-out method of traditional technology. Instead, the noise is attenuated within the chamber due to refraction, reflection, and diffraction caused by the undulations of the pressure profile, significantly reducing the sound energy of the noise. Furthermore, the attenuated composite noise reaches the multiple air inlets and the strip-shaped opening. Because the corresponding parts of the chamber with the multiple air inlets form a perforated plate resonant silencer, the resonant frequency is close to the combustion frequency. Thus, the incident sound wave of the composite noise generates intense vibration and friction as it passes through the air inlets, forming an absorption peak and reducing the sound energy of the noise. In this way, the noise is attenuated during its propagation and diffusion within the chamber, and undergoes sound energy attenuation before propagating outwards, effectively reducing system noise. The overall operating noise can be reduced by approximately 3dB-5dB.

Description

Technical Field

[0001] This invention relates to the field of water heater technology, and in particular to a gas water heater and its housing assembly. Background Technology

[0002] As living standards improve, the demand for gas water heaters is no longer limited to simple hot water bathing. Comfort indicators such as constant water temperature throughout the process and low operating noise are receiving increasing attention. The concept of sound channel is gradually being applied to the field of sound insulation and noise reduction technology for gas water heaters.

[0003] Traditional gas water heaters are typically mounted on the walls of kitchens, bathrooms, and balconies, with the wall-facing panel serving as the back panel. This back panel usually has a straight-in, straight-out air intake channel. However, the combined noise generated during operation, such as combustion vibrations and flame disturbances, propagates outwards through the air intake channel without attenuation, resulting in high operating noise and poor product performance. Summary of the Invention

[0004] The first technical problem solved by this invention is to provide a housing assembly for a gas water heater that can effectively reduce noise and improve product performance.

[0005] The second technical problem solved by this invention is to provide a gas water heater that effectively reduces noise and improves product performance.

[0006] The first technical problem mentioned above is solved by the following technical solution:

[0007] A housing assembly for a gas water heater, the housing assembly comprising:

[0008] A back panel and a cover panel are provided, the cover panel being disposed on the back panel, the cover panel and the back panel enclosing each other to form a cavity, the back panel having a strip-shaped opening and a plurality of air inlets, the air inlets being disposed on the wall of the air inlet path through the strip-shaped opening; the cover panel having at least one first air outlet arranged offset from the plurality of air inlets; the air inlets, the strip-shaped opening and the first air outlet are all connected to the cavity.

[0009] The beneficial effects of the gas water heater housing assembly described in this invention compared to the prior art are as follows:

[0010] In the aforementioned gas water heater casing assembly, during combustion, fresh external air enters the chamber through the air inlet and the slotted opening, and then enters the interior of the gas water heater through the first air outlet, satisfying the replenishment of primary and secondary air and heat dissipation requirements for combustion. Simultaneously, combined noise from combustion, including combustion vibrations, flame disturbances, and fan noise, enters the chamber through the first air outlet and propagates outwards in the opposite direction of airflow. On one hand, the staggered arrangement of the air inlet and the first air outlet prolongs the propagation path of the combined noise after it passes through the chamber. Instead of the straight-in-straight-out method of traditional technology, the noise is attenuated within the chamber due to refraction, reflection, and diffraction caused by pressure variations, significantly reducing some of the noise's acoustic energy. Furthermore, the attenuated composite noise reaches multiple air inlets and slots. Because the sections of the chamber corresponding to these air inlets form a perforated plate resonant silencer, the resonant frequency is close to the combustion frequency. Thus, the incident sound waves of the composite noise generate intense vibration and friction as they pass through the air inlets, forming absorption peaks and reducing the noise's acoustic energy. In this way, noise is attenuated during its propagation and diffusion within the chamber, and its acoustic energy is attenuated before it propagates outwards, effectively reducing system noise. The overall operating noise can be reduced by approximately 3dB-5dB.

[0011] In one embodiment, the diameter of the air inlet is defined as d, where d is 1mm-3mm; the thickness of the plate where the air inlet is located on the back panel is defined as t, where t is 0.6mm-1mm; the distance between the plate where the air inlet is located on the back panel and the cover plate is defined as L1, where L1 is 5mm-20mm; and the edge distance between two adjacent air inlets is defined as J, where J is 2mm-10mm.

[0012] In one embodiment, d is 3 mm; t is 0.8 mm; L1 is 10 mm; and J is 4 mm.

[0013] In one embodiment, the back panel has a first recess recessed in a direction away from the cover plate, and a second recess disposed adjacent to the first recess recess. The depth of the first recess recess is defined as S1, and the depth of the second recess recess is defined as S2, where S1 > S2. The bottom wall of the first recess recess is defined as a first bottom wall, and the bottom wall of the second recess recess is defined as a second bottom wall. A plurality of air inlets are disposed on the second bottom wall, and the first air outlet is disposed on a portion of the cover plate opposite to the first bottom wall. At least a portion or the entire area of ​​one side wall of the second recess recess forms the strip-shaped opening.

[0014] In one embodiment, the perforation rate on the second bottom wall is defined as p, where p is 0.01-0.02.

[0015] In one embodiment, the cover plate is further provided with at least one second air outlet that is staggered from the plurality of air inlets.

[0016] In one embodiment, the second air outlet is disposed on the part of the cover plate opposite to the first bottom wall, and the second air outlet is spaced apart from the first air outlet.

[0017] In one embodiment, the cover plate has a first protrusion and a second protrusion on the part opposite to the first bottom wall. The first protrusion extends into the first recess and is located between the plurality of air inlets and the first air outlet. The second protrusion extends into the first recess and is located between the plurality of air inlets and the second air outlet.

[0018] In one embodiment, the distance between the surface of the cover plate and the first bottom wall is defined as L2, the height of the first protrusion protruding from the surface of the cover plate is defined as h1, and the height of the second protrusion protruding from the surface of the cover plate is defined as h2; wherein, 5mm≤L2≤20mm; 5mm

[0019] In one embodiment, the back panel is further provided with a third recess that is recessed in a direction away from the cover plate and is adjacent to the second recess; the bottom wall of the third recess is defined as a third bottom wall, and at least one air inlet is provided on the third bottom wall; at least one third air outlet is provided on the part of the cover plate opposite to the third bottom wall, and the third air outlet is staggered from the air inlet.

[0020] In one embodiment, an air guide plate is provided at the air inlet, the air guide plate is located inside the cavity, one side of the air guide plate is connected to the edge of the air inlet, and the other side of the air guide plate is provided with an airflow gap from the third bottom wall.

[0021] The second technical problem mentioned above is solved by the following technical solution:

[0022] A gas water heater, the gas water heater including the aforementioned housing assembly.

[0023] The gas water heater of the present invention has the following advantages compared with the prior art:

[0024] ​In the aforementioned gas water heater, during combustion, fresh external air enters the chamber through the air inlet and the slotted opening, and then enters the interior of the water heater through the first air outlet, satisfying the replenishment of primary and secondary air and heat dissipation requirements for combustion. Simultaneously, combined noise from combustion, including combustion vibrations, flame disturbances, and fan noise, enters the chamber through the first air outlet and propagates outwards in the opposite direction of airflow. On one hand, the staggered arrangement of the air inlet and the first air outlet prolongs the propagation path of the combined noise after it passes through the chamber. Instead of the straight-in-straight-out method of traditional technology, the noise is attenuated within the chamber due to refraction, reflection, and diffraction caused by pressure variations, significantly reducing some of the noise's acoustic energy. Furthermore, the attenuated composite noise reaches multiple air inlets and slots. Because the sections of the chamber corresponding to these air inlets form a perforated plate resonant silencer, the resonant frequency is close to the combustion frequency. Thus, the incident sound waves of the composite noise generate intense vibration and friction as they pass through the air inlets, forming absorption peaks and reducing the noise's acoustic energy. In this way, noise is attenuated during its propagation and diffusion within the chamber, and its acoustic energy is attenuated before it propagates outwards, effectively reducing system noise. The overall operating noise can be reduced by approximately 3dB-5dB. Attached Figure Description

[0025] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the housing assembly of a gas water heater according to an embodiment of the present invention from one perspective.

[0028] Figure 2 for Figure 1 A schematic diagram of the exploded structure shown;

[0029] Figure 3 This is a schematic diagram of the housing assembly of a gas water heater according to an embodiment of the present invention from another perspective.

[0030] Figure 4 This is a schematic diagram of the rear structure of the housing assembly of a gas water heater according to an embodiment of the present invention;

[0031] Figure 5 for Figure 4 A schematic cross-sectional view at point AA;

[0032] Figure 6 for Figure 4 Cross-sectional structural diagram at BB;

[0033] Figure 7 This is a cross-sectional structural schematic diagram of the housing assembly of a gas water heater according to an embodiment of the present invention;

[0034] Figure 8 for Figure 7 A magnified structural diagram at point C;

[0035] Figure 9 This is a cross-sectional structural schematic diagram of the housing assembly of a gas water heater according to an embodiment of the present invention;

[0036] Figure 10 for Figure 9 A magnified structural diagram at point D;

[0037] Figure 11 This is a cross-sectional structural schematic diagram of the housing assembly of a gas water heater according to an embodiment of the present invention;

[0038] Figure 12 for Figure 11 A magnified structural diagram at point E.

[0039] Figure label:

[0040] 10. Back panel; 111. Air inlet; 112. Strip opening; 12. First recess; 121. First bottom wall; 13. Second recess; 131. Second bottom wall; 14. Third recess; 141. Third bottom wall; 143. Air inlet; 144. Air guide plate; 20. Cover plate; 211. First air outlet; 221. Second air outlet; 23. First protrusion; 24. Second protrusion; 251. Third air outlet; 30. Chamber. Detailed Implementation

[0041] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0042] See Figures 1 to 3 , Figure 1 The diagram shows a schematic view of the housing assembly of a gas water heater according to an embodiment of the present invention. Figure 2 It shows Figure 1 The diagram shows the exploded structure of the illustrated structure. Figure 3 This diagram illustrates another perspective of the housing assembly of a gas water heater according to an embodiment of the present invention. The housing assembly of a gas water heater provided in this embodiment includes a back panel 10 and a cover plate 20. The cover plate 20 is disposed on the back panel 10, and the cover plate 20 and the back panel 10 enclose a cavity 30. The back panel 10 has a strip-shaped opening 112 and a plurality of air inlets 111, the air inlets 111 being disposed on the wall of the air inlet path through the strip-shaped opening 112. The cover plate 20 has at least one first air outlet 211, which is staggered from the plurality of air inlets 111. The air inlets 111, the strip-shaped opening 112, and the first air outlet 211 are all in communication with the cavity 30.

[0043] In the aforementioned gas water heater casing assembly, during combustion, fresh external air enters the chamber 30 through the air inlet 111 and the strip opening 112, and then enters the interior of the gas water heater through the first air outlet 211, satisfying the replenishment of primary and secondary air and heat dissipation requirements for combustion. Simultaneously, combined noise from combustion, including combustion vibrations, flame disturbances, and fan noise, enters the chamber 30 through the first air outlet 211 and propagates outwards in the opposite direction of airflow. On one hand, the staggered arrangement of the air inlet 111 and the first air outlet 211 extends the propagation path of the combined noise after passing through the chamber 30, preventing a direct inflow and outflow as in traditional technologies. Instead, the noise is attenuated within the chamber 30 due to refraction, reflection, and diffraction caused by the pressure undulations, significantly reducing some of the noise's acoustic energy. Furthermore, the attenuated composite noise reaches the air inlet 111 and the strip opening 112. Since the portion of the chamber 30 corresponding to the air inlet 111 and multiple air inlets 111 form a perforated plate resonant silencer, the resonant frequency is close to the frequency of the combustion noise. Thus, the incident sound wave of the composite noise generates intense vibration and friction as it passes through the air inlet 111, forming an absorption peak and reducing the noise's acoustic energy. In this way, the noise is attenuated during its propagation and diffusion within the chamber 30, and undergoes acoustic energy attenuation before propagating outwards, effectively reducing system noise. The overall operating noise can be reduced by approximately 3dB-5dB.

[0044] See Figure 2 , Figure 3 and Figure 5In one embodiment, the air inlet direction of the strip-shaped opening 112 is set at an angle to the air inlet direction of the air inlet hole 111. Specifically, the back panel 10 is provided with a second recess 13 recessed in a direction away from the cover plate 20. The bottom wall of the second recess 13 is defined as a second bottom wall 131. A plurality of air inlets 111 are provided on the second bottom wall 131, and at least one first air outlet 211 is provided on the cover plate 20 at a position opposite to the first bottom wall 121. In addition, at least a portion or the entire area of ​​one side wall of the second recess 13 forms the strip-shaped opening 112, such that the air inlet direction of the strip-shaped opening 112 is set at an angle to the air inlet direction of the air inlet hole 111. Thus, the parts of the chamber 30 corresponding to the multiple air inlets 111 form a perforated plate resonant silencer with the multiple air inlets 111, so that the resonant frequency is close to the frequency of the combustion noise. In this way, the incident sound wave of the composite noise generates intense vibration and friction when passing through the air inlets 111, forming an absorption peak and reducing the sound energy of the noise.

[0045] It should be noted that the staggered arrangement of multiple air inlets 111 and at least one first air outlet 211 means that the two are not arranged opposite each other in the direction perpendicular to the plate surface, that is, they cannot overlap.

[0046] In one embodiment, the circumferential edge of the cover plate 20 is tightly fitted onto the back panel 10, thereby forming a cavity 30 by the cover plate 20 and the back panel 10 together. Specifically, the circumferential edge of the cover plate 20 is detachably fixed to the back panel 10 by means of mounting components such as screws, bolts, pins, rivets, and snap-fit ​​devices.

[0047] Please see Figure 4 In one embodiment, the diameter of the air inlet 111 is defined as d, where d is 1mm-3mm. Thus, the diameter d of the air inlet 111 is relatively small, which meets the design requirements and is equivalent to a micropore, thus achieving a better noise reduction effect.

[0048] Please see Figure 5 In one embodiment, the thickness of the back panel 10 at the location where the air inlet 111 is located is defined as t, where t is 0.6mm-1mm. Thus, the thickness t at the location where the air inlet 111 is located on the back panel 10 is appropriately designed, ensuring good noise reduction while saving on material usage.

[0049] Please see Figure 9 and Figure 10 In one embodiment, the distance between the plate with the air inlet 111 on the back panel 10 and the cover plate 20 is defined as L1, where L1 is 5mm-20mm. Thus, the distance L1 between the plate with the air inlet 111 on the back panel 10 and the cover plate 20 ensures that the air resistance of the chamber 30 is not too high, resulting in a small air volume, and also ensures that the air resistance of the chamber 30 is not too low, resulting in a large air volume.

[0050] In one embodiment, the edge spacing between two adjacent air inlets 111 is defined as J, where J is 2mm-10mm.

[0051] It should be noted that the edge spacing refers to the distance obtained by subtracting the radius of one air inlet and the radius of the other air inlet from the distance between the center of the two air inlets 111.

[0052] In one embodiment, the perforation rate on the second bottom wall 131 is defined as p, where p is 0.01-0.02. Thus, the perforation rate p is appropriately designed to achieve good noise reduction.

[0053] In one embodiment, d is 3 mm; t is 0.8 mm; L1 is 10 mm; p is 0.015; and J is 4 mm. This allows the resonant frequency of the perforated plate silencing structure to be close to the center peak of the noise band in the combustion noise spectrum analysis (approximately 300 Hz), thus achieving a good noise reduction effect.

[0054] Optionally, the number of air inlets 111 provided at the second bottom wall 131 is typically 60 to 100.

[0055] Please see Figure 1 , Figure 3 and Figure 5 In one embodiment, the back panel 10 has a first recess 12 recessed in a direction away from the cover plate 20, and a second recess 13 adjacent to the first recess 12. The depth of the first recess 12 is defined as S1, and the depth of the second recess 13 is defined as S2, where S1 > S2. The bottom wall of the first recess 12 is defined as the first bottom wall 121, and the bottom wall of the second recess 13 is defined as the second bottom wall 131. Multiple air inlets 111 are disposed on the second bottom wall 131, and a first air outlet 211 is disposed on the cover plate 20 at a position opposite to the first bottom wall 121. Thus, on the one hand, since S1 is greater than S2, and the first recess 12 and the second recess 13 are disposed adjacent to each other, the structure formed by the first bottom wall 121 and the second bottom wall 131 is stepped. When noise passes through the chamber 30 and the multiple air inlets 111 to the outside, it will fluctuate within the chamber 30, producing attenuation such as refraction, reflection, and diffraction, which can greatly reduce some of the sound energy of the noise. On the other hand, it can achieve a staggered arrangement of multiple air inlets 111 and the first air outlet 211, thereby extending the propagation path of noise in the chamber 30 and avoiding direct entry and exit.

[0056] As an example, the second bottom wall 131 may, but is not limited to, use its entire structure to form a plurality of air inlets 111. In addition, the portion of the cover plate 20 opposite to the first bottom wall 121 may, but is not limited to, use a portion of its structure to form at least one first air outlet 211.

[0057] In one embodiment, the difference between S1 and S2 is, but is not limited to, 2mm-5mm. Furthermore, the distance between the first bottom wall 121 and the cover plate 20 is defined as L2 (e.g., Figure 6 As shown). Accordingly, L2 (as shown) Figure 6 As shown) ≧ L1 (as shown) Figure 10 As shown), the difference between L2 and L1 is, but is not limited to, 2mm-5mm.

[0058] Please see Figure 1 , Figure 3 , Figures 9 to 12 In one embodiment, the cover plate 20 is further provided with at least one second air outlet 221, which is staggered from the plurality of air inlets 111. The at least one second air outlet 221 is located on the cover plate 20 at a position opposite to the first bottom wall 121, and is spaced apart from the at least one first air outlet 211. Thus, some of the air entering the chamber 30 through the plurality of air inlets 111 enters the interior of the gas water heater through the at least one first air outlet 211, simultaneously dissipating heat from one part of the gas water heater's interior. The remaining air enters the interior of the gas water heater through the at least one second air outlet 221, simultaneously dissipating heat from another part of the gas water heater's interior. This achieves better heat dissipation.

[0059] In one embodiment, at least one first air outlet 211 is directed towards the motor of the gas water heater (not shown in the figure). Thus, air exhausted from at least one second air outlet 221 can be directed towards the motor of the gas water heater, providing cooling and improving the lifespan of the gas water heater.

[0060] As an alternative, at least one first air outlet 211 and at least one second air outlet 221 can also be directed towards other components of the gas water heater to dissipate heat from them. Of course, at least one first air outlet 211 and at least one second air outlet 221 may not be directed towards any component of the gas water heater, and the specific locations of at least one first air outlet 211 and at least one second air outlet 221 can be flexibly selected according to actual needs and are not limited here.

[0061] In one embodiment, the first air outlet 211 includes, but is not limited to, being waist-shaped, and consisting of at least two spaced apart. Similarly, the second air outlet 221 includes, but is not limited to, being waist-shaped, and consisting of at least two spaced apart.

[0062] Please see Figure 1 , Figure 3 , Figure 9 and Figure 11In one embodiment, the cover plate 20 has a first protrusion 23 and a second protrusion 24 protruding towards the first bottom wall 121 on the portion opposite to the first bottom wall 121. The first protrusion 23 extends into the first recess 12 and is located between the plurality of air inlets 111 and the first air outlet 211, and the second protrusion 24 extends into the first recess 12 and is located between the plurality of air inlets 111 and the second air outlet 221. In this way, on the one hand, the first protrusion 23 prolongs the noise propagation path entering through the first air outlet 211, which is not a straight-in-straight-out method as in the traditional technology, but rather attenuates the noise through refraction, reflection, diffraction, etc. due to the undulation of the molding inside the chamber 30, which can greatly reduce some of the sound energy of the noise; on the other hand, the first protrusion 23 plays a role in avoiding the motor, which can make the structure of the gas water heater more compact. Similarly, the second protrusion 24 extends the noise propagation path of the second air outlet 221. Instead of the straight-in-straight-out method of traditional technology, the noise is attenuated by refraction, reflection, and diffraction inside the chamber 30 due to the undulation of the compression, which can greatly reduce some of the noise energy.

[0063] Please see Figure 1 , Figure 3 , Figure 7 and Figure 8 In one embodiment, the back panel 10 is further provided with a third recess 14 recessed in a direction away from the cover plate 20 and adjacent to the second recess 13. The bottom wall of the third recess 14 is defined as a third bottom wall 141, and at least one air inlet 143 is provided on the third bottom wall 141. At least one third air outlet 251 is provided on the part of the cover plate 20 opposite to the third bottom wall 141. The at least one third air outlet 251 is staggered with the at least one air inlet 143. Thus, air mainly enters the gas water heater through multiple air inlets 111. In addition, it can be supplemented into the gas water heater through at least one air inlet 143 to ensure that the amount of air entering the gas water heater is sufficient. In addition, the air entering the chamber 30 through at least one air inlet 143 mainly enters the gas water heater through at least one third air outlet 251. When the air enters the gas water heater through at least one third air outlet 251, it can play a role in heat dissipation for the components inside the gas water heater.

[0064] In one embodiment, at least one third air outlet 251 is directed towards the controller of the gas water heater (not shown in the figure). In this way, the air from the at least one third air outlet 251 can effectively dissipate heat from the controller, thus extending the lifespan of the controller.

[0065] Please see Figure 1 , Figure 3 , Figure 7 and Figure 8In one embodiment, an air guide plate 144 is provided at the air inlet 143. The air guide plate 144 is located inside the chamber 30. One side of the air guide plate 144 is connected to the edge of the air inlet 143, and the other side of the air guide plate 144 is separated from the third bottom wall 141 by an airflow gap. Specifically, the projection of the air guide plate 144 along a direction perpendicular to the surface of the third bottom wall 141 completely covers the air inlet 143. Thus, the structure formed by the air inlet 143 and the air guide plate 144 is similar to a louver, which can effectively prevent noise inside the chamber 30 from being directly discharged to the outside, and can effectively reduce noise. The air guide plate 144 includes, but is not limited to, a slanted plate, an arc plate, or an irregularly shaped plate.

[0066] In one embodiment, the total air intake area is larger than the cross-sectional area of ​​the exhaust pipe opening. This ensures the amount of air required for gas combustion and meets the heat dissipation requirements of internal components. Specifically, the total air intake area is the sum of the areas of the air intake hole 111, the strip opening 112, and the air intake 143.

[0067] Of course, if the combustion power of the gas water heater changes (for example, increases), the air intake area on the back panel 10 needs to be adjusted (increased accordingly) according to the theoretical air volume, and the cross-sectional area of ​​the exhaust pipe opening needs to be adjusted (increased accordingly) simultaneously.

[0068] In one embodiment, the depth of the third recess 14 is defined as S3 (e.g., Figure 6 As shown), S2≧S3.

[0069] In one embodiment, the first recess 12, the second recess 13, the first protrusion 23, the second protrusion 24 and the third recess 14 are, but are not limited to, integral pressing and forming of sheet material through die processes such as punching, deep drawing and bending.

[0070] Please see Figures 1 to 3 In one embodiment, a gas water heater includes the housing assembly of any of the above embodiments.

[0071] In the aforementioned gas water heater, during combustion, fresh external air enters the chamber 30 through the air inlet 111 and the strip opening 112, and then enters the interior of the gas water heater through the first air outlet 211, satisfying the replenishment of primary and secondary air and heat dissipation requirements for combustion. Simultaneously, combined noise from combustion, including combustion vibrations, flame disturbances, and fan noise, enters the chamber 30 through the first air outlet 211 and propagates outwards in the opposite direction of airflow. On one hand, the staggered arrangement of the air inlet 111 and the first air outlet 211 extends the propagation path of the combined noise after passing through the chamber 30, preventing a direct inflow and outflow as in traditional technologies. Instead, the noise is attenuated within the chamber 30 due to refraction, reflection, and diffraction caused by pressure variations, significantly reducing some of the noise's acoustic energy. Furthermore, the attenuated composite noise reaches the air inlet 111 and the strip opening 112. Since the portion of the chamber 30 corresponding to the air inlet 111 and multiple air inlets 111 form a perforated plate resonant silencer, the resonant frequency is close to the frequency of the combustion noise. Thus, the incident sound wave of the composite noise generates intense vibration and friction as it passes through the air inlet 111, forming an absorption peak and reducing the noise's acoustic energy. In this way, the noise is attenuated during its propagation and diffusion within the chamber 30, and undergoes acoustic energy attenuation before propagating outwards, effectively reducing system noise. The overall operating noise can be reduced by approximately 3dB-5dB.

[0072] It should be noted that when describing a component being connected to another component, or a component being mounted on another component, it can be understood that the connection between the two components can specifically involve using mounting components such as bolts, screws, pins, and rivets, or using snap-fit, welding, or integral molding methods for fixation. Integral molding methods can employ processes such as extrusion, casting, press fitting, and injection molding.

[0073] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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 embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

[0075] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0076] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0077] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0078] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0079] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

Claims

1. A housing assembly for a gas water heater, characterized in that, The housing assembly of the gas water heater includes: A back panel (10) and a cover plate (20) are provided. The cover plate (20) is disposed on the back panel (10). The cover plate (20) and the back panel (10) enclose a cavity (30). The back panel (10) is provided with a strip-shaped opening (112) and a plurality of air inlets (111). The air inlets (111) are disposed on the wall of the air intake path through the strip-shaped opening (112). The cover plate (20) is provided with at least one first air outlet (211) which is staggered from the plurality of air inlets (111). The air inlets (111), the strip-shaped opening (112) and the first air outlet (211) are all connected to the cavity (30). The back panel (10) is provided with a direction away from the cover plate (20). A first recess (12) is recessed, and a second recess (13) is disposed adjacent to the first recess (12). The depth of the first recess (12) is defined as S1, and the depth of the second recess (13) is defined as S2, where S1 > S2. The bottom wall of the first recess (12) is defined as the first bottom wall (121), and the bottom wall of the second recess (13) is defined as the second bottom wall (131). A plurality of air inlets (111) are disposed on the second bottom wall (131), and the first air outlet (211) is disposed on the cover plate (20) at a position opposite to the first bottom wall (121). At least a portion or the entire area on one of the side walls of the second recess (13) forms the strip-shaped opening (112).

2. The housing assembly of the gas water heater according to claim 1, characterized in that, The diameter of the air inlet (111) is defined as d, where d is 1mm-3mm; the thickness of the plate at the location where the air inlet (111) is located on the back panel (10) is defined as t, where t is 0.6mm-1mm; the distance between the plate at the location where the air inlet (111) is located on the back panel (10) and the cover plate (20) is defined as L1, where L1 is 5mm-20mm; the edge distance between two adjacent air inlets (111) is defined as J, where J is 2mm-10mm.

3. The housing assembly of the gas water heater according to claim 2, characterized in that, d is 3mm; t is 0.8mm; L1 is 10mm; J is 4mm.

4. The housing assembly of the gas water heater according to claim 1, characterized in that, The perforation rate on the second bottom wall (131) is defined as p, where p is 0.01-0.

02.

5. The housing assembly of the gas water heater according to claim 1, characterized in that, The cover plate (20) is also provided with at least one second air outlet (221) which is arranged in a staggered manner from the plurality of air inlets (111).

6. The housing assembly of the gas water heater according to claim 5, characterized in that, The second air outlet (221) is located on the cover plate (20) at a position opposite to the first bottom wall (121), and the second air outlet (221) is spaced apart from the first air outlet (211).

7. The housing assembly of the gas water heater according to claim 5, characterized in that, The cover plate (20) is provided with a first protrusion (23) and a second protrusion (24) protruding towards the first bottom wall (121) at the part opposite to the first bottom wall (121). The first protrusion (23) extends into the first recess (12) and is located between the plurality of air inlets (111) and the first air outlet (211). The second protrusion (24) extends into the first recess (12) and is located between the plurality of air inlets (111) and the second air outlet (221).

8. The housing assembly of the gas water heater according to claim 7, characterized in that, The distance between the surface of the cover plate (20) and the first bottom wall (121) is defined as L2, the height of the first protrusion (23) protruding from the surface of the cover plate (20) is defined as h1, and the height of the second protrusion (24) protruding from the surface of the cover plate (20) is defined as h2; wherein, 5mm≤L2≤20mm; 5mm<h1<20mm, and h1<L2; 3mm<h2<18mm, and h2<h1.

9. The housing assembly of the gas water heater according to claim 1, characterized in that, The back panel (10) is also provided with a third recess (14) that is recessed in a direction away from the cover plate (20) and is adjacent to the second recess (13); the bottom wall of the third recess (14) is defined as a third bottom wall (141), and at least one air inlet (143) is provided on the third bottom wall (141); at least one third air outlet (251) is provided on the part of the cover plate (20) opposite to the third bottom wall (141), and the third air outlet (251) is staggered from the air inlet (143).

10. The housing assembly of the gas water heater according to claim 9, characterized in that, A guide plate (144) is provided at the air inlet (143). The guide plate (144) is located inside the chamber (30). One side of the guide plate (144) is connected to the edge of the air inlet (143), and the other side of the guide plate (144) is provided with an airflow gap to the third bottom wall (141).

11. A gas water heater, characterized in that, The gas water heater includes the housing assembly as described in any one of claims 1 to 10.

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