Noise reduction shell and gas water heater
By designing a noise reduction housing that includes sound insulation components and optimizes the distribution of air inlet holes, the problem of fan performance degradation during noise reduction of gas water heaters is solved, and noise reduction and smoke exhaust efficiency are improved.
Patent Information
- Application Number
- CN202510588675.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-08
- Publication Date
- 2025-06-17
AI Technical Summary
The fan performance of existing gas water heaters degrades when noise reduction, resulting in increased noise and poor smoke exhaust.
A noise reduction housing is designed, including a housing and a sound insulation assembly, which forms a cavity in communication with the air inlet hole between the sound insulation assembly and the back plate, attenuates noise through the cavity, and optimizes the distribution of air inlet and through holes to reduce air flow resistance and noise reflection.
It effectively reduces noise, improves smooth flow of airflow, improves smoke exhaust efficiency, and avoids the problems of degradation in fan performance and increasing noise.
Smart Images
Figure CN120160296A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of household appliances, and particularly to a noise reduction housing and a gas water heater. Background Art
[0002] When a gas water heater is operating normally, it will generate relatively large noise, which will bring an unpleasant experience to users moving near the water heater. In order to reduce noise, mostly a sound insulation cover plate with staggered openings is added inside the air inlet back plate of the gas water heater to block the outward propagation of noise. However, since the air flow changes the direction of air flow when entering the cavity formed by the sound insulation cover plate and the air inlet back plate from the air inlet hole of the air inlet back plate and passing through the openings of the sound insulation cover plate, it affects the smoothness of the air flow and the performance of the exhaust fan; at the same time, if the cavity spacing between the sound insulation cover plate and the air inlet back plate is too small, it will generate a relatively large flow resistance, and if it is too large, it will cause the internal space of the casing to be crowded and generate air flow vortices, resulting in a decrease in the performance of the fan, a decrease in the air intake volume, and an increase in the fan speed to achieve the same exhaust effect, thereby increasing the noise. The current gas water heaters have the problem of a decrease in the working performance of the fan during noise reduction. Summary of the Invention
[0003] Based on this, in view of the problem that the working performance of the fan decreases during noise reduction of the existing gas water heaters, it is necessary to provide a noise reduction housing and a gas water heater.
[0004] A noise reduction housing for a gas water heater, the noise reduction housing includes: an outer shell including a back plate and a front panel, the front panel is disposed on one side of the back plate along a first direction, and the front panel and the back plate enclose a receiving space, the first direction being the thickness direction of the outer shell; a sound insulation assembly disposed on the side of the back plate facing the receiving space; wherein, the back plate has an air inlet hole, a cavity is formed between the sound insulation assembly and the back plate, the cavity is communicated with the air inlet hole, and one side of the cavity along a second direction has an opening, the second direction intersecting the first direction. In the above-mentioned noise reduction housing, the sound insulation assembly is disposed on the side of the back plate facing the receiving space, and a cavity communicated with the air inlet hole is formed between the sound insulation assembly and the back plate. When the gas water heater is operating, the noise generated is first transmitted to the cavity through the opening on one side of the cavity, propagated through the cavity to the air inlet hole, and then transmitted outward through the air inlet hole. The cavity attenuates the noise, extends the propagation distance of the noise, and reduces the noise; at the same time, the air flow can flow smoothly when entering and leaving the cavity, greatly reducing the flow resistance of the air flow, facilitating smoke exhaust, and improving the situation where the noise increases due to the need to increase the fan speed due to poor smoke exhaust.
[0005] In one embodiment, the number of the air inlet holes is at least two, the sum of the opening areas of the air inlet holes is A1, the cross-sectional area of the opening of the cavity is A2, and 1.5≤A1 / A2≤2.5. The beneficial effect here is that by limiting the ratio of A1 / A2 within a preset range, the air intake volume can meet the design requirements and help reduce the noise radiated outward.
[0006] In one embodiment, the cross-sectional area A2 of the opening of the cavity is in the range of 2800 mm 2 ~3000mm 2 The beneficial effect here is that by limiting A2 within a preset range, the airflow in the accommodating space can be prevented from generating vortices, and the noise radiated outward can be reduced at the same time.
[0007] In one embodiment, the sound insulation assembly includes a sound insulation board, the sound insulation board cover is arranged on the side of the air inlet facing the panel, and the cavity is formed between the sound insulation board and the back plate. The beneficial effect here is that a cavity connected to the air inlet is formed between the sound insulation board and the back plate, and the noise generated when the gas water heater is working is first transmitted to the cavity through the opening on the upper side of the cavity, and then transmitted to the air inlet through the cavity, and then transmitted outward through the air inlet. The cavity attenuates the noise, thereby extending the propagation distance of the noise and reducing the noise.
[0008] In one embodiment, the sound insulation assembly further comprises a noise reduction member, and the noise reduction member is arranged on the side of the sound insulation board away from the back plate. The beneficial effect here is that the noise reduction member is arranged on the side of the sound insulation board away from the back plate, facing the noise source of the fan volute, and can absorb part of the noise, thereby reducing the noise.
[0009] In one embodiment, the noise reduction component is at least one of sound-absorbing cotton, sound-insulating foam, and a damping layer. The beneficial effect here is that it can absorb part of the noise and reduce the noise.
[0010] In one embodiment, the sound insulation board includes a main body and an edge portion provided outside the main body, the edge portion is fixedly connected to the side of the back plate facing the panel, the main body is constructed as a structure protruding toward the panel along the first direction, and the cavity is formed between the main body and the back plate. The beneficial effect here is that the sound insulation board includes two parts, the main body and the edge portion, a cavity is formed between the main body and the back plate, and the sound insulation board is fixedly connected to the side of the back plate facing the panel through the edge portion, so that the overall structure of the sound insulation board is compact and the structural design is reasonable, it will not occupy too much space, and the space utilization rate of the noise reduction shell is improved.
[0011] In one of the embodiments, the number of the air inlet holes is at least two, the main body is provided with at least two through holes, all of the through holes are staggered with all of the air inlet holes; all of the air inlet holes form at least two rows in the second direction and / or at least two columns in the third direction, and the third direction, the second direction and the first direction intersect and are not coplanar. The beneficial effects here are: by providing through holes on the main body of the sound insulation board, and providing a noise reduction component on the side of the main body away from the back plate, the noise is further absorbed by the noise reduction component on the basis of attenuating noise by the cavity of the sound insulation board, thereby further reducing noise; all of the air inlet holes form at least two rows in the second direction and / or at least two columns in the third direction, which is conducive to the uniform distribution of the intake volume in the second direction and / or the third direction.
[0012] In one embodiment, the main body has a first offset zone and a second offset zone that are offset from all the air inlet holes, and at least one through hole is respectively provided in the second offset zone and the first offset zone, and the aperture of at least one through hole in the first offset zone is different from the aperture of at least one through hole in the second offset zone. The beneficial effect here is: by forming two offset zones that are offset from all the air inlet holes on the main body, and providing through holes in the two offset zones, the reflection and propagation paths of the sound waves are changed, the concentrated reflection of the sound waves is reduced, and the noise reduction is greatly improved.
[0013] In one embodiment, the second offset area is located below the first offset area. The beneficial effect here is that the two offset areas are staggered with all the air inlets, which changes the reflection and propagation path of the sound waves, reduces the concentrated reflection of the sound waves, and greatly improves the noise reduction.
[0014] In one embodiment, the aperture of any through hole in the first misaligned area is D3, 4mm≤D3≤6mm. The beneficial effect here is: by limiting the aperture D3 of each through hole in the first misaligned area within a preset range and by designing the aperture of each through hole as needed, the noise of different frequency bands can be weakened and the noise reduction amount can be improved.
[0015] In one embodiment, at least two of the through holes are provided in the first misaligned area. All the through holes in the first misaligned area form at least two columns in the third direction. In the first misaligned area, the column pitch between two adjacent columns of the through holes in the third direction is L1, where 15 mm ≤ L1 ≤ 25 mm; and / or all the through holes in the first misaligned area form at least two rows in the second direction. In the first misaligned area, the row pitch between two adjacent rows of the through holes in the second direction is L2, where 8 mm ≤ L2 ≤ 12 mm. The beneficial effect here is that in the first misaligned area, by limiting the column pitch L1 between two adjacent columns of through holes in the third direction and / or the row pitch L2 between two adjacent rows of through holes in the second direction within a preset range, and designing the row pitch and column pitch of each through hole as required, noise in different frequency bands can be weakened, further improving the noise reduction amount.
[0016] In one embodiment, the aperture of any one of the through holes in the second misaligned area is D4, where 2 mm ≤ D4 ≤ 4 mm. The beneficial effect here is that by limiting the aperture D4 of each through hole in the second misaligned area within a preset range and designing the aperture of each through hole as required, noise in different frequency bands can be weakened, improving the noise reduction amount.
[0017] In one embodiment, at least two of the through holes are provided in the second misaligned area. All the through holes in the second misaligned area form at least two columns in the third direction. In the second misaligned area, the column pitch between two adjacent columns of the through holes in the third direction is L3, where 6 mm ≤ L3 ≤ mm; and / or all the through holes in the second misaligned area form at least two rows in the second direction. In the second misaligned area, the row pitch between two adjacent rows of the through holes in the second direction is L4, where 4 mm ≤ L4 ≤ 6 mm. The beneficial effect here is that in the second misaligned area, by limiting the column pitch L3 between two adjacent columns of through holes in the third direction and / or the row pitch L4 between two adjacent rows of through holes in the second direction within a preset range, and designing the row pitch and column pitch of each through hole as required, noise in different frequency bands can be weakened, further improving the noise reduction amount.
[0018] A gas water heater includes the above noise reduction housing. In the above gas water heater, the sound insulation component is arranged on the side of the back plate facing the front panel, and a cavity communicating with the air inlet hole is formed between the sound insulation component and the back plate. When the gas water heater operates, the generated noise first passes through the opening on the upper side of the cavity to reach the cavity, is transmitted through the cavity to the air inlet hole, and is transmitted outward through the air inlet hole. The cavity attenuates the noise, extends the propagation distance of the noise, and reduces the noise; at the same time, the air flow can flow smoothly when entering and leaving the cavity, greatly reducing the flow resistance of the air flow, facilitating smoke exhaust, and improving the situation where the noise increases due to the need to increase the fan speed due to poor smoke exhaust.
[0019] In one embodiment, the gas water heater further includes an air inlet volute disposed within the outer casing; the cavity has a dimension D1 in the first direction, and the distance between the side of the sound insulation board facing away from the back plate and the air inlet volute in the first direction is D2, where 0.2 ≤ D1 / D2 ≤ 0.3. The beneficial effect here is that by limiting the ratio of D1 / D2 within a preset range, it can reduce the radiated noise outward while ensuring sufficient air intake, avoid the formation of air flow vortices in the accommodation space formed between the front panel and the back plate, and prevent the degradation of the fan performance. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 The following is a rear view of the gas water heater in some embodiments of the present application.
[0021] Figure 2 is Figure 1 an exploded view of the gas water heater shown.
[0022] Figure 3 is Figure 2 a front view of the gas water heater shown.
[0023] Figure 4 is Figure 3 a front view of the noise reduction housing, the air inlet volute and the motor in the gas water heater shown.
[0024] Figure 5 is Figure 2 an exploded view of the sound insulation component in the gas water heater shown.
[0025] Figure 6 An isometric view of the sound insulation board of the sound insulation component in some embodiments of the present application.
[0026] Figure 7 An isometric view of the sound insulation board of the sound insulation component in some other embodiments of the present application.
[0027] Figure 8 is Figure 7 a schematic diagram of the dimensions of the sound insulation board shown.
[0028] Figure 9 A simulation diagram of the air flow velocity vector of the gas water heater before and after optimization.
[0029] Figure 10 A simulation diagram of the air flow velocity streamline of the gas water heater before and after optimization.
[0030] Figure 11 A sound pressure distribution diagram of the front panel of the gas water heater before and after optimization.
[0031] Reference numerals:
[0032] 10. Noise reduction housing; 20. Inlet air volute; 30. Motor; 40. Air duct; 100. Outer shell; 110. Back plate; 111. Air inlet hole; 112. Cavity; 112a. Opening; 120. Panel; 200. Sound insulation component; 210. Sound insulation board; 211. Main body part; 211a. First dislocation area; 211b. Second dislocation area; 212. Edge part; 213. Through hole; 220. Noise reduction part. Detailed implementation manners
[0033] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application in conjunction with the accompanying drawings. Many specific details are set forth in the following description to fully understand 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 departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.
[0034] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying 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 to the present application.
[0035] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.
[0036] In the present application, unless otherwise clearly specified and limited, the terms "initial", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.
[0037] In this application, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is less than that of the second feature.
[0038] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate 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 intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.
[0039] Please refer to Figures 1 to 3 , in one embodiment, the noise reduction housing 10 is used for a gas water heater. The noise reduction housing 10 includes a housing 100 and a sound insulation component 200. The housing 100 includes a back plate 110 and a front panel 120. The front panel 120 is disposed on one side of the back plate 110 along a first direction. The front panel 120 and the back plate 110 enclose an accommodation space. The first direction is the thickness direction of the housing 100. The sound insulation component 200 is disposed on the side of the back plate 110 facing the accommodation space; wherein, the back plate 110 has an air inlet hole 111. A cavity 112 is formed between the sound insulation component 200 and the back plate 110. The cavity 112 is communicated with the air inlet hole 111, and one side of the cavity 112 along a second direction has an opening 112a. The second direction intersects with the first direction.
[0040] It should be noted that the first direction is Figure 2 the X direction shown, that is, the thickness direction of the housing 100; the second direction is Figure 2 the Z direction shown, that is, the height direction of the housing 100.
[0041] Here, the sound insulation component 200 is disposed on the side of the back plate 110 facing the front panel 120 and is received in the accommodation space.
[0042] For the above-mentioned noise reduction housing 10, the sound insulation component 200 is arranged on the side of the back plate 110 facing the front panel 120, and a cavity 112 communicating with the air inlet hole 111 is formed between the sound insulation component 200 and the back plate 110. When the gas water heater operates, the noise generated is first transmitted to the cavity 112 through the opening on one side of the cavity 112, propagated through the cavity 112 to the air inlet hole 111, and then transmitted outward through the air inlet hole 111. The cavity 112 attenuates the noise, extends the propagation distance of the noise, and reduces the noise. At the same time, the air flow can flow smoothly when entering and leaving the cavity 112, greatly reducing the flow resistance of the air flow, facilitating smoke exhaust, and improving the situation where the noise increases due to the need to increase the fan speed due to poor smoke exhaust.
[0043] In the embodiment of the present application, the front panel 120 is arranged on one side of the back plate 110 along the first direction. The front panel 120 and the back plate 110 can be of a split structure. For example, the front panel 120 and the back plate 110 are detachably connected by means such as snap connection, plug connection or screw connection; the front panel 120 and the back plate 110 can also be of an integral structure. For example, the front panel 120 and the back plate 110 are integrally formed by means such as injection molding or casting. Among them, the front panel 120 and the back plate 110 can have various structural forms. For example, the front panel 120 is in the shape of a rectangular plate, and the back plate 110 is in the shape of a U-shaped plate. A receiving space is formed by enclosing between the back plate 110 and the front panel 120. Here, the fixing method and shape of the front panel 120 and the back plate 110 are not limited.
[0044] In the embodiment of the present application, the sound insulation component 200 is arranged on the side of the back plate 110 facing the front panel 120. The sound insulation component 200 and the back plate 110 are of a split structure, and the sound insulation component 200 and the back plate 110 are detachably connected by means such as snap connection, plug connection or screw connection.
[0045] In the embodiment of the present application, a cavity 112 is formed between the sound insulation component 200 and the back plate 110. The cavity 112 communicates with the air inlet hole 111, and one side of the cavity 112 along the second direction has an opening 112a. The opening 112a can be arranged on the upper side or the lower side of the cavity 112, that is, the opening 112a is arranged in the upward direction of the cavity 112 along the second direction, or the opening 112a is arranged in the downward direction of the cavity 112 along the second direction.
[0046] For example, in Figures 2 - 4 In some of the illustrated embodiments, the cavity 112 has an upward opening 112a along the second direction. At this time, the air inlet volute 20 and the motor 30 of the gas water heater are arranged below the combustion component. The cavity 112 can be a square cavity, a circular cavity or a cavity of other shapes with an upper opening 112a. Here, the shape of the cavity 112 is not limited.
[0047] For example, in other embodiments, a cavity 112 is formed between the sound insulation component 200 and the back panel 110, and the cavity 112 has an opening 112a downward along the second direction. At this time, the air inlet volute 20 and the motor 30 of the gas water heater are arranged above the combustion component, the air inlet hole 111 and the sound insulation component 200 are arranged on the side away from the back panel 110, and the air inlet hole 111 and the sound insulation component 200 are arranged on the upper side of the back panel 110 close to the air inlet volute 20. Further, the back plate 110 includes a side plate along the second direction and a top plate along the first direction, a cavity 112 is formed between the sound insulation component 200 and the side plate, and the cavity 112 has an opening 112a downward along the second direction; or, a cavity 112 is formed between the sound insulation component 200, the side plate and the top plate, and the cavity 112 has an opening 112a downward along the second direction; or, a cavity 112 is formed between the sound insulation component 200 and the top plate, and the cavity 112 has an opening 112a downward along the second direction. The sound insulation component 200 can be arranged according to the position of the air inlet volute 20 and the motor 30, so that the noise of the air inlet volute 20 and the motor 30 can be absorbed by the sound insulation component to reduce the noise.
[0048] Specifically, please refer to Figures 1 to 3 The number of the air inlet holes 111 is at least two, the sum of the opening areas of the air inlet holes 111 is A1, the cross-sectional area of the opening 112a of the cavity 112 is A2, and 1.5≤A1 / A2≤2.5.
[0049] It should be noted that the cross-sectional area of the opening 112 a of the cavity 112 is also the flow area of the opening 112 a of the cavity 112 .
[0050] Here, the smaller the ratio of A1 / A2 is, the smaller the sum A1 of the opening areas of the air inlet holes 111 is, which will result in a smaller air intake volume and smaller noise radiated outward; or, the larger the cross-sectional area A2 of the opening 112a of the cavity 112 is, the less likely the airflow is to generate vortices in the accommodating space, the more concentrated the direction of the airflow movement is, but the greater the noise radiated outward is.
[0051] Here, the larger the ratio of A1 / A2 is, the larger the sum A1 of the opening areas of the air inlet holes 111 is, the greater the air intake will be, and the greater the noise radiated outward; or, the smaller the cross-sectional area A2 of the opening 112a of the cavity 112 is, the easier it is for the airflow to generate vortices in the accommodating space, the more divergent the direction of the airflow movement is, and the smaller the noise radiated outward is.
[0052] The beneficial effect here is that by limiting the ratio of A1 / A2 within a preset range, the air intake volume can meet the design requirements and at the same time help reduce the noise radiated outward.
[0053] In the embodiments of the present application, the opening areas of all the air inlet holes 111 may be equal or unequal. When the opening areas of all the air inlet holes 111 are equal, the intake air volume can be more evenly distributed.
[0054] More specifically, please refer to Figures 1 to 3 , the cross-sectional area A2 of the opening 112a of the cavity 112 ranges from 2800 mm 2 to 3000 mm 2 .
[0055] The beneficial effect here is that by limiting A2 within a preset range, it is possible to prevent the air flow from generating vortices in the accommodation space and at the same time facilitate reducing the radiated noise.
[0056] In some embodiments of the present application, the cross-sectional area A2 of the opening 112a of the cavity 112 takes values of 2800 mm 2 , 2850 mm 2 , 2900 mm 2 , 2950 mm 2 , 3000 mm 2 .
[0057] Please refer to Figure 4 and Figure 5 , the sound insulation component 200 includes a sound insulation board 210. The sound insulation board 210 covers the side of the air inlet holes 111 facing the panel 120, and the cavity 112 is formed between the sound insulation board 210 and the back plate 110.
[0058] It can be understood that the sound insulation board 210 covers the side of the air inlet holes 111 facing the panel 120, that is: the sound insulation board 210 is arranged on the side of the back plate 110 facing the panel 120 and covers the position where the air inlet holes 111 are located, so that the cavity 112 formed between the sound insulation board 210 and the back plate 110 can communicate with the air inlet holes 111.
[0059] The beneficial effect here is that a cavity 112 communicating with the air inlet holes 111 is formed between the sound insulation board 210 and the back plate 110. When the gas water heater is working, the noise generated first passes through the opening on the upper side of the cavity 112 to reach the cavity 112, is transmitted through the cavity 112 to the air inlet holes 111, and is transmitted outward through the air inlet holes 111. The cavity 112 attenuates the noise, extends the propagation distance of the noise, and reduces the noise.
[0060] In an embodiment of the present application, the sound insulation board 210 and the back board 110 may be of a split structure. For example, the sound insulation board 210 and the back board 110 are detachably connected by means of snap connection, plug connection, threaded connection, etc.; the sound insulation board 210 and the back board 110 may also be of an integral structure. For example, the sound insulation board 210 and the back board 110 are integrally formed by means of injection molding, casting, etc. Among them, the sound insulation board 210 may have various structural forms. For example, the back board 110 is in the shape of a rectangular plate, the sound insulation board 210 is in the shape of a U-shaped plate, and a cavity 112 with an upper opening 112a is formed by enclosing between the sound insulation board 210 and the back board 110. Here, the fixing method and shape of the sound insulation board 210 and the back board 110 are not limited.
[0061] Further, please refer to Figure 5 , the sound insulation assembly 200 further includes a noise reduction member 220, and the noise reduction member 220 is disposed on a side of the sound insulation board 210 facing away from the back board 110.
[0062] The beneficial effect here is that the noise reduction member 220 is disposed on a side of the sound insulation board 210 facing away from the back board 110, which can absorb part of the noise and reduce the noise.
[0063] In an embodiment of the present application, the noise reduction member 220 and the sound insulation board 210 are of a split structure, and the noise reduction member 220 and the sound insulation board 210 may be fixed by means of snap connection, plug connection, or pasting.
[0064] In an embodiment of the present application, the noise reduction member 220 is in the shape of a rectangular block to match the sound insulation board 210, and the noise reduction member 220 may also be in the shape of a circular or other shaped block. Among them, refer to Figure 5 , the number of the noise reduction members 220 is not limited to one. When the number of the noise reduction members 220 is at least two, the noise reduction members 220 may be stacked in the first direction (i.e., the Figure 5 shown X direction) to enhance the noise reduction effect.
[0065] Specifically in this embodiment, please refer to Figure 5 , the noise reduction member 220 is at least one of sound-absorbing cotton, sound insulation foam, and damping layer.
[0066] The beneficial effect here is that it can absorb part of the noise and reduce the noise.
[0067] In an embodiment of the present application, the noise reduction member 220 may be any one of sound-absorbing cotton, sound insulation foam, and damping layer, or at least two of sound-absorbing cotton, sound insulation foam, and damping layer.
[0068] Even further, please refer to Figure 6 and Figure 3, the sound insulation panel 210 includes a main body portion 211 and an edge portion 212 provided outside the main body portion 211. The edge portion 212 is fixedly connected to one side of the back plate 110 facing the front panel 120. The main body portion 211 is configured to protrude towards the front panel 120 in the first direction, and a cavity 112 is formed between the main body portion 211 and the back plate 110.
[0069] It should be noted that since the main body portion 211 protrudes towards the front panel 120 in the first direction (i.e., Figure 6 the X direction shown), there is sufficient space between the main body portion 211 and the back plate 110 in the first direction to form the cavity 112. The edge portion 212 is provided on the outer periphery of the main body portion 211, and the sound insulation panel 210 is fixedly connected to one side of the back plate 110 facing the front panel 120 through the edge portion 212.
[0070] The beneficial effect here is that the sound insulation panel 210 includes two parts, namely the main body portion 211 and the edge portion 212. A cavity 112 is formed between the main body portion 211 and the back plate 110, and the sound insulation panel 210 is fixedly connected to one side of the back plate 110 facing the front panel 120 through the edge portion 212, making the overall structure of the sound insulation panel 210 compact and the structural design reasonable, without occupying too much space, and improving the space utilization rate of the noise reduction housing 10.
[0071] In the embodiment of the present application, the main body portion 211 and the edge portion 212 can be a split structure. For example, the main body portion 211 and the edge portion 212 are detachably connected by means of snap connection, plug connection or screw connection, etc.; the main body portion 211 and the edge portion 212 can also be an integral structure. For example, the main body portion 211 and the edge portion 212 are integrally formed by means of injection molding, casting, etc.
[0072] In the embodiment of the present application, the main body portion 211 and the edge portion 212 can have various structural forms. For example, the main body portion 211 has a U-shaped structure with an upper opening 112a, and the edge portion 212 has a hollow annular structure. The outer contour of the edge portion 212 can be circular, square or other shapes. Here, the shapes of the main body portion 211 and the edge portion 212 are not limited.
[0073] Please refer to Figure 5 , the number of air inlet holes 111 is at least two. The main body portion 211 is provided with at least two through holes 213, and all the through holes 213 and all the air inlet holes 111 are staggeredly distributed; all the air inlet holes 111 form at least two rows in the second direction and / or at least two columns in the third direction. The third direction, the second direction and the first direction intersect and are not coplanar.
[0074] It should be noted that all the through holes 213 and all the air inlet holes 111 are staggeredly distributed, that is, the projections of all the through holes 213 and all the air inlet holes 111 on the YZ plane do not overlap. When the gas water heater works, part of the noise generated is absorbed by the noise reduction member 220, and the other part is transmitted to the air inlet holes 111 through the cavity 112 and then transmitted outward through the air inlet holes 111.
[0075] The beneficial effects here are as follows: By providing through holes 213 on the main body 211 of the sound insulation board 210 and arranging a noise reduction member 220 on the side of the main body 211 facing away from the back plate 110, the through holes 213 of the sound insulation board 210 are used to digest the noise in the cavity 112, and the noise reduction member 220 can also absorb the noise transmitted through the through holes 213 in the cavity 112; the noise reduction member 220 can also absorb the noise in the accommodation space, further reducing the noise. All the air inlet holes 111 form at least two rows in the second direction and / or at least two columns in the third direction, which is beneficial to the uniform distribution of the air intake volume in the second direction and / or the third direction. In the embodiments of the present application, all the air inlet holes 111 have the same shape and size to facilitate uniform air intake. For example, all the air inlet holes 111 are kidney-shaped holes with the same size and shape.
[0076] In the embodiments of the present application, all the through holes 213 have the same shape, and the sizes of some through holes 213 are different. For example, all the through holes 213 are circular, some through holes 213 have a larger aperture, and some through holes 213 have a smaller aperture.
[0077] More specifically, please refer to Figure 7 and Figure 5 , the main body 211 has a first misalignment area 211a and a second misalignment area 211b that are staggeredly distributed with all the air inlet holes 111. At least one through hole 213 is provided in each of the second misalignment area 211b and the first misalignment area 211a, and the aperture of at least one through hole 213 in the first misalignment area 211b is different from the aperture of at least one through hole 213 in the second misalignment area 211a.
[0078] It should be noted that the third direction is Figure 7 the Y direction shown, that is, the length direction of the housing 100.
[0079] The beneficial effects here are as follows: By forming two misalignment areas on the main body 211 that are staggeredly distributed with all the air inlet holes 111 and providing through holes 213 in the two misalignment areas respectively, the reflection and propagation paths of sound waves are changed, the concentrated reflection of sound waves is reduced, and the noise reduction amount is greatly improved.
[0080] Please refer to Figure 7 and Figure 5 , the second misalignment area 211b is located below the first misalignment area 211a.
[0081] The beneficial effects here are as follows: The two misaligned areas are misaligned with all the air inlet holes 111, which changes the reflection and propagation paths of sound waves, reduces the concentrated reflection of sound waves, and greatly improves the noise reduction amount.
[0082] In the embodiment of the present application, the second misaligned area 211b is located below the first misaligned area 211a and is vertically distributed with the first misaligned area 211a. The numbers of the first misaligned area 211a and the second misaligned area 211b are not limited to one, and the numbers of the first misaligned area 211a and the second misaligned area 211b can be designed according to actual needs. For example, when the numbers of both the first misaligned area 211a and the second misaligned area 211b are one, the first misaligned area 211a and the second misaligned area 211b form a T-shaped structure; when the number of the first misaligned area 211a is two and the number of the second misaligned area 211b is one, the first misaligned area 211a and the second misaligned area 211b form an I-shaped structure.
[0083] Specifically in this embodiment, please refer to Figure 7 and Figure 8 , the aperture of any through hole 213 in the first misaligned area 211a is D3, and 4 mm ≤ D3 ≤ 6 mm.
[0084] The beneficial effects here are as follows: By limiting the aperture D3 of each through hole 213 in the first misaligned area 211a within a preset range and designing the aperture of each through hole as needed, noise in different frequency bands can be weakened, and the noise reduction amount can be improved.
[0085] In the embodiment of the present application, the apertures of all the through holes 213 in the first misaligned area 211a are equal, which is beneficial to uniform noise reduction and effectively improves the noise reduction effect.
[0086] Please refer to Figure 7 and Figure 8 , at least two through holes 213 are provided in the first misaligned area 211a. All the through holes 213 in the first misaligned area 211a form at least two columns in the third direction. In the first misaligned area 211a, the column pitch between two adjacent columns of through holes 213 in the third direction is L1, and 15 mm ≤ L1 ≤ 25 mm; and / or, all the through holes 213 in the first misaligned area 211a form at least two rows in the second direction. In the first misaligned area 211a, the row pitch between two adjacent rows of through holes 213 in the second direction is L2, and 8 mm ≤ L2 ≤ 12 mm.
[0087] It should be noted that the second direction is Figure 7 the Z direction shown in Figure 7 , that is, the height direction of the housing 100; the third direction is
[0088] The beneficial effects here are as follows: within the first misalignment area 211a, by limiting both the column pitch L1 of two adjacent columns of through-holes 213 in the third direction and / or the row pitch L2 of two adjacent rows of through-holes 213 in the second direction within a preset range, the row pitch and column pitch of each through-hole can be designed as required, so as to weaken noises of different frequency bands and further increase the noise reduction amount.
[0089] In the embodiment of the present application, within the first misalignment area 211a, the column pitch of every two adjacent columns of through-holes 213 in the third direction is equal and / or the row pitch of every two adjacent rows of through-holes 213 in the second direction is equal, which is beneficial to uniform noise reduction and effectively improves the noise reduction effect.
[0090] Specifically in this embodiment, please refer to Figure 7 and Figure 8 , the aperture of any through-hole 213 in the second misalignment area 211b is D4, and 2mm ≤ D4 ≤ 4mm.
[0091] The beneficial effects here are as follows: by limiting the aperture D4 of each through-hole 213 in the second misalignment area 211b within a preset range, and designing the aperture of each through-hole as required, noises of different frequency bands can be weakened and the noise reduction amount can be increased.
[0092] In the embodiment of the present application, the apertures of all through-holes 213 in the second misalignment area 211b are equal, which is beneficial to uniform noise reduction and effectively improves the noise reduction effect.
[0093] Please refer to Figure 7 and Figure 8 , at least two through-holes 213 are provided in the second misalignment area 211b. All through-holes 213 in the second misalignment area 211b form at least two columns in the third direction. In the second misalignment area 211b, the column pitch of two adjacent columns of through-holes 213 in the third direction is L3, and 6mm ≤ L3 ≤ 10mm; and / or, all through-holes 213 in the second misalignment area 211b form at least two rows in the second direction. In the second misalignment area 211b, the row pitch of two adjacent rows of through-holes 213 in the second direction is L4, and 4mm ≤ L4 ≤ 6mm.
[0094] It should be noted that the second direction is Figure 7 the Z direction shown in Figure 7 , that is, the height direction of the housing 100; the third direction is
[0095] The beneficial effect here is: in the second offset area 211b, by limiting the column spacing L3 of two adjacent columns of through holes 213 in the third direction and / or the row spacing L4 of two adjacent rows of through holes 213 in the second direction within a preset range, the row spacing and column spacing of each through hole are designed as needed, the noise in different frequency bands can be weakened, and the noise reduction amount can be further improved.
[0096] In an embodiment of the present application, in the second offset region 211b, the column spacing between every two adjacent columns of through holes 213 in the third direction is equal and / or the row spacing between every two adjacent rows of through holes 213 in the second direction is equal, so as to facilitate uniform noise reduction and effectively improve the noise reduction effect.
[0097] Please refer to Figure 1 and Figure 2 In one embodiment, the gas water heater includes the above-mentioned noise reduction housing 10.
[0098] It should be noted that the above-mentioned gas water heater also includes other components such as an air inlet volute 20, a motor 30, an air duct 40, etc. The air inlet of the air inlet volute 20 faces the sound insulation component 200, and the air outlet of the air inlet volute 20 is connected to the air duct 40. The air duct 40 is used for smoke exhaust. The motor 30 is connected to the fan blades in the air inlet volute 20 and is used to drive the fan blades to rotate.
[0099] In the above-mentioned gas water heater, the sound insulation component 200 is arranged on the side of the back plate 110 facing the panel 120, and a cavity 112 connected to the air inlet hole 111 is formed between the sound insulation component 200 and the back plate 110. The noise generated when the gas water heater is working is first transmitted to the cavity 112 through the opening on the upper side of the cavity 112, and then transmitted to the air inlet hole 111 through the cavity 112, and then transmitted outward through the air inlet hole 111. The cavity 112 attenuates the noise, extends the propagation distance of the noise, and reduces the noise; at the same time, the airflow can flow smoothly when entering and exiting the cavity 112, which greatly reduces the flow resistance of the airflow, is conducive to smoke exhaust, and improves the situation where the noise increases due to the need to increase the fan speed due to poor smoke exhaust.
[0100] Specifically, please refer to Figure 4 The gas water heater also includes an air inlet volute 20, which is arranged in the outer shell 100; the size of the cavity 112 in the first direction is D1, and the distance between the side of the sound insulation board 210 of the sound insulation assembly 200 away from the back plate 110 and the air inlet volute 20 in the first direction is D2, 0.2≤D1 / D2≤0.3.
[0101] It should be noted that the dimension of the cavity 112 in the first direction, that is, the distance between the back plate 110 and the main body 211 of the sound insulation plate 210 in the first direction. The smaller the ratio of D1 / D2, the smaller the dimension D1 of the cavity 112 in the first direction, the smaller the distance between the cavities 112, the greater the air flow resistance, the smaller the air intake, which is not conducive to smoke exhaust. To achieve the same smoke exhaust effect, the fan speed needs to be increased, and with the increase of the speed, the noise also increases; the larger the ratio of D1 / D2, the larger the dimension D1 of the cavity 112 in the first direction, which will cause the internal space of the housing 100 to be crowded (that is, the smaller the distance between the main body 211 of the sound insulation plate 210 and the air inlet volute 20), and it is easy to generate air flow vortices in the accommodation space formed between the panel 120 and the back plate 110, resulting in a decline in the fan performance.
[0102] The beneficial effect here is that by limiting the ratio of D1 / D2 within a preset range, it is possible to reduce the externally radiated noise while ensuring sufficient air intake, and at the same time avoid the generation of air flow vortices in the accommodation space formed between the panel 120 and the back plate 110, and prevent the decline of the fan performance.
[0103] In the embodiment of the present application, the air inlet volute 20 of the gas water heater is arranged in the accommodation space formed between the panel 120 and the back plate 110, and the air inlet volute 20 of the gas water heater is the main noise source during the operation of the gas water heater.
[0104] In order to study the influence of the sound insulation cover plate before optimization (i.e., the prior art, with holes behind the sound insulation cover plate) and the optimized sound insulation plate 210 (i.e., the present solution, with an opening on the upper side of the sound insulation plate 210) on the noise and fan smoke exhaust of the gas water heater, simulation tests and comparisons were carried out on the relevant parameters of the gas water heater.
[0105] Figure 9 (a) is the air flow velocity vector simulation diagram of the gas water heater before optimization, Figure 9 (b) is the air flow velocity vector simulation diagram of the optimized gas water heater. From Figure 9 (a) and Figure 9 (b), it can be seen that before optimization, under the state of having holes behind the sound insulation cover plate, air flow vortices were generated behind the sound insulation cover plate, which would cause a significant decline in the working performance of the fan; after optimization, under the state of having an opening on the upper side of the sound insulation plate 210, no air flow vortices appeared, the air flow velocity through the ventilation holes was more uniform, and the working performance of the fan was better.
[0106] Figure 10 (a) is the air flow velocity streamline simulation diagram of the gas water heater before optimization, Figure 10 (b) is the air flow velocity streamline simulation diagram of the optimized gas water heater. From Figure 10 (a) and Figure 10(b) It can be seen that before optimization, when there are openings behind the sound insulation cover plate, the direction of air flow movement diverges. The air flow shoots out from the openings. Part of the air flow whirls upward after moving to the front panel and then enters the fan volute, and the other part whirls downward after moving to the front panel and then enters the fan volute. After optimization, when there is an opening on the upper side of the sound insulation board 210, the air flow shoots out from the upper opening, moves upward along the back plate of the water heater, moves around the inner wall surface of the shell for one week and then enters the fan volute. The direction of air flow movement is more concentrated, and it is not easy to have mutual impacts of multi-directional air flows, and the working performance of the fan is better.
[0107] Figure 11 (a) is the sound pressure distribution diagram in front of the panel of the gas water heater before optimization. Figure 11 (c) is the sound pressure distribution diagram on the side of the panel of the gas water heater before optimization. Figure 11 (b) is the sound pressure distribution diagram in front of the panel of the gas water heater after optimization. Figure 11 (d) is the sound pressure distribution diagram on the side of the panel of the gas water heater after optimization. It can be seen from Figure 11 (a)-(d) that before optimization, when there are openings behind the sound insulation cover plate, the panel sound pressure is mainly concentrated at the centers of the front and side of the panel, and the sound pressure distribution area is relatively large. After optimization, when there is an opening on the upper side of the sound insulation board 210, the panel sound pressure is mainly concentrated at the upper left of the front of the panel and the upper part of the side. The sound pressure will be farther away from the human ear, and there will be a better user experience.
[0108] Table 1 shows the comparison of the air outlet flow rate and the fan total pressure efficiency of the exhaust port of the gas water heater before and after optimization obtained by simulation. It can be seen from Table 1 that after optimization, when there is an opening on the upper side of the sound insulation board 210, the air outlet flow rate of the exhaust port of the gas water heater is 53.34 m 3 / h, which is closer to the 53.78 m 3 / h air outlet flow rate of the exhaust port of the gas water heater without the sound insulation cover plate. At the same time, after optimization, the fan total pressure efficiency of the water heater is also closer to the fan total pressure efficiency without the sound insulation cover plate, only decreasing by 2.3%. It can achieve the minimum impact on the performance of the gas water heater fan while reducing the noise of the gas water heater.
[0109] Table 1
[0110]
[0111] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brief description, 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, it should be considered as the scope recorded in this specification.
[0112] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.
Claims
1. A noise reduction housing (10) for a gas water heater, characterized in that: The noise reduction housing (10) comprises: A housing (100) comprising a back plate (110) and a panel (120), wherein the panel (120) is arranged on one side of the back plate (110) along a first direction, and the panel (120) and the back plate (110) enclose a containing space, wherein the first direction is a thickness direction of the housing (100); A sound insulation component (200) is arranged on a side of the back plate (110) facing the accommodating space; The back plate (110) has an air inlet hole (111), a cavity (112) is formed between the sound insulation component (200) and the back plate (110), the cavity (112) is connected to the air inlet hole (111), and the cavity (112) has an opening (112a) on one side along a second direction, and the second direction is a height direction of the housing (100).
2. The noise reduction housing (10) according to claim 1, characterized in that: The number of the air inlet holes (111) is at least two, the sum of the opening areas of the air inlet holes (111) is A1, the cross-sectional area of the opening (112a) of the cavity (112) is A2, and 1.5≤A1 / A2≤2.
5.
3. The noise reduction housing (10) according to claim 2, characterized in that: The cross-sectional area A2 of the opening (112a) of the cavity (112) is in the range of 2800 mm 2 ~3000mm 2 .
4. The noise reduction housing (10) according to claim 1, characterized in that: The sound insulation component (200) comprises a sound insulation board (210), wherein the sound insulation board (210) is arranged to cover a side of the air inlet hole (111) facing the panel (120), and the cavity (112) is formed between the sound insulation board (210) and the back panel (110).
5. The noise reduction housing (10) according to claim 4, characterized in that: The sound insulation component (200) further comprises a noise reduction component (220), wherein the noise reduction component (220) is arranged on a side of the sound insulation board (210) facing away from the back board (110).
6. The noise reduction housing (10) according to claim 5, characterized in that: The noise reduction component (220) is at least one of sound-absorbing cotton, sound-insulating foam, and a damping layer.
7. The noise reduction housing (10) according to any one of claims 4 to 6, characterized in that: The sound insulation board (210) comprises a main body (211) and an edge portion (212) arranged outside the main body (211), the edge portion (212) being fixedly connected to a side of the back plate (110) facing the panel (120), the main body (211) being constructed as a structure protruding toward the panel (120) along the first direction, and the cavity (112) being formed between the main body (211) and the back plate (110).
8. The noise reduction housing (10) according to claim 7, characterized in that: The number of the air inlet holes (111) is at least two, the main body (211) is provided with at least two through holes (213), and all the through holes (213) are staggered with all the air inlet holes (111); all the air inlet holes (111) form at least two rows in the second direction and / or at least two columns in the third direction, and the third direction, the second direction and the first direction intersect and are not coplanar.
9. The noise reduction housing (10) according to claim 8, characterized in that: The main body (211) comprises a first offset zone (211a) and a second offset zone (211b) which are offset from all the air inlet holes (111), and at least one through hole (213) is respectively provided in the second offset zone (211b) and the first offset zone (211a), and the aperture of at least one through hole (213) in the first offset zone (211b) is different from the aperture of at least one through hole (213) in the second offset zone (211a).
10. The noise reduction housing (10) according to claim 9, characterized in that: The second dislocation region (211b) is located below the first dislocation region (211a).
11. The noise reduction housing (10) according to claim 9, characterized in that: The aperture of any through hole (213) in the first dislocation zone (211a) is D3, 4mm≤D3≤6mm.
12. The noise reduction housing (10) according to claim 9, characterized in that: At least two through holes (213) are provided in the first dislocation zone (211a); all the through holes (213) in the first dislocation zone (211a) form at least two rows in the third direction; in the first dislocation zone (211a), a row distance between two adjacent rows of through holes (213) in the third direction is L1, and 15 mm ≤ L1 ≤ 25 mm; And / or, all the through holes (213) in the first dislocation zone (211a) form at least two rows in the second direction, and in the first dislocation zone (211a), a row spacing between two adjacent rows of through holes (213) in the second direction is L2, 8mm≤L2≤12mm.
13. The noise reduction housing (10) according to claim 9, characterized in that: The aperture of any through hole (213) in the second dislocation zone (211b) is D4, 2mm≤D4≤4mm.
14. The noise reduction housing (10) according to claim 9, characterized in that: At least two through holes (213) are provided in the second dislocation zone (211b); all the through holes (213) in the second dislocation zone (211b) form at least two rows in the third direction; in the second dislocation zone (211b), a row distance between two adjacent rows of through holes (213) in the third direction is L3, 6mm≤L3≤10mm; And / or, all the through holes (213) in the second dislocation zone (211b) form at least two rows in the second direction, and in the second dislocation zone (211b), a row spacing between two adjacent rows of through holes (213) in the second direction is L4, 4mm≤L4≤6mm.
15. A gas water heater, characterized in that: It comprises a noise reduction housing (10) as claimed in any one of claims 1 to 14.
16. The gas water heater according to claim 15, characterized in that: The gas water heater further comprises an air inlet volute (20), wherein the air inlet volute (20) is arranged in the outer shell (100); The size of the cavity (112) in the first direction is D1, and the distance between the side of the sound insulation board (210) of the sound insulation assembly (200) facing away from the back plate (110) and the air inlet volute (20) in the first direction is D2, and 0.2≤D1 / D2≤0.3.