Noise reduction shell and gas water heater
By designing a connecting cavity and sound insulation components in the noise-reducing casing of the gas water heater, the problems of decreased fan performance and increased noise are solved, achieving the effects of noise reduction and smooth airflow.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GREE ELECTRIC APPLIANCE INC OF ZHUHAI
- Filing Date
- 2025-05-08
- Publication Date
- 2026-05-15
AI Technical Summary
The problem of reduced fan performance in gas water heaters during noise reduction leads to increased noise and poor smoke extraction.
A noise-reducing housing is designed, including an outer shell and a sound insulation component. By forming a connected cavity between the back panel and the sound insulation component, the cavity is used to attenuate noise and improve airflow. The area ratio of the air inlet and the range of the cavity opening area are limited to a specific range. The noise is absorbed by combining the sound insulation panel and the noise reduction component.
It effectively reduces noise radiation, improves airflow smoothness, increases smoke extraction efficiency, and prevents fan performance degradation.
Smart Images
Figure CN224246460U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of household appliance technology, and in particular to a noise-reducing housing and a gas water heater. Background Technology
[0002] Gas water heaters generate significant noise during normal operation, negatively impacting the experience for users near them. To reduce noise, most systems incorporate a sound-insulating cover with staggered openings inside the air intake panel to block noise propagation. However, airflow direction changes as it enters the cavity formed by the sound-insulating cover and the air intake panel, and then passes through the openings in the cover, affecting airflow smoothness and exhaust fan performance. Furthermore, too small a gap between the sound-insulating cover and the air intake panel creates significant flow resistance, while too large a gap leads to congestion and airflow vortices within the casing, reducing fan performance and intake volume. To achieve the same exhaust effect, the fan needs to operate at a higher speed, increasing noise. Currently, gas water heaters suffer from a decline in fan performance when attempting noise reduction. Utility Model Content
[0003] Therefore, it is necessary to provide a noise-reducing casing and a gas water heater to address the problem of reduced fan performance in existing gas water heaters when noise reduction is implemented.
[0004] A noise-reducing housing for a gas water heater, the noise-reducing housing comprising: an outer shell, including a back panel and a front panel, the front panel being disposed on one side of the back panel along a first direction, and the front panel and the back panel forming an accommodating space, the first direction being the thickness direction of the outer shell; and a sound-insulating component disposed on the side of the back panel facing the accommodating space; wherein the back panel has an air inlet, the sound-insulating component and the back panel forming a cavity, the cavity communicating with the air inlet, and the cavity having an opening on one side along a second direction, the second direction intersecting the first direction. The aforementioned noise-reducing housing has a sound insulation component located on the side of the back panel facing the accommodating space. The sound insulation component and the back panel form a cavity that communicates with the air inlet. When the gas water heater is working, the noise generated first passes through the opening on one side of the cavity to the cavity, then through the cavity to the air inlet, and then outward through the air inlet. The cavity attenuates the noise, extends the noise propagation distance, and reduces the noise. At the same time, the airflow can flow smoothly when entering and exiting the cavity, which greatly reduces the airflow resistance, facilitates smoke exhaust, and improves the situation where the fan speed needs to be increased due to poor smoke exhaust, which leads to increased noise.
[0005] In one embodiment, the number of air inlets is at least two, the sum of the opening areas of all air inlets is A1, and the cross-sectional area of the cavity opening is A2, where 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, while simultaneously reducing outward radiated noise.
[0006] In one embodiment, the cross-sectional area A2 of the cavity opening is in the range of 2800 mm². 2 ~3000mm 2 The beneficial effect here is that by limiting A2 within a preset range, vortices are prevented from forming in the airflow within the containment space, while also reducing outward radiated noise.
[0007] In one embodiment, the sound insulation component includes a sound insulation panel that covers the side of the air inlet facing the panel, and the cavity is formed between the sound insulation panel and the back panel. The beneficial effect here is that the cavity formed between the sound insulation panel and the back panel communicates with the air inlet. Noise generated when the gas water heater is operating is first transmitted to the cavity through the opening on the upper side of the cavity, then propagates through the cavity to the air inlet, and then propagates outwards through the air inlet. The cavity attenuates the noise, extending the noise propagation distance and reducing noise levels.
[0008] In one embodiment, the sound insulation assembly further includes a noise reduction component disposed on the side of the sound insulation panel facing away from the back panel. The beneficial effect here is that, since the noise reduction component is located on the side of the sound insulation panel facing away from the back panel and directly opposite the noise source of the fan casing, it can absorb some of the noise and reduce the overall noise level.
[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 some noise, thus reducing noise levels.
[0010] In one embodiment, the sound insulation panel includes a main body and an edge portion disposed outside the main body. The edge portion is fixedly connected to the side of the back panel facing the front panel. The main body is configured to protrude towards the front panel along the first direction, and the cavity is formed between the main body and the back panel. The advantages here are: the sound insulation panel includes a main body and an edge portion, a cavity is formed between the main body and the back panel, and the edge portion fixes the sound insulation panel to the side of the back panel facing the front panel, making the overall structure of the sound insulation panel compact and rationally designed, without occupying excessive space, thus improving the space utilization rate of the noise reduction housing.
[0011] In one embodiment, the number of air inlets is at least two, and the main body has at least two through holes. All the through holes and all the air inlets are staggered. All the air inlets 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 but are not coplanar. The beneficial effect here is that by providing through holes on the main body of the sound insulation panel and providing a noise reduction component on the side of the main body away from the back panel, the noise is further reduced by using the cavity of the sound insulation panel to attenuate noise and then absorbing noise further through the noise reduction component. The fact that all the air inlets form at least two rows in the second direction and / or at least two columns in the third direction facilitates the uniform distribution of air intake in the second direction and / or the third direction.
[0012] In one embodiment, the main body has a first misaligned region and a second misaligned region that are staggered from all the air inlets. At least one through-hole is provided in both the second misaligned region and the first misaligned region. The diameter of the at least one through-hole in the first misaligned region is different from the diameter of the at least one through-hole in the second misaligned region. The beneficial effect here is that by forming two misaligned regions on the main body that are staggered from all the air inlets, and by providing through-holes in each of the two misaligned regions, the reflection and propagation path of the sound waves is changed, reducing concentrated reflection of the sound waves and significantly improving noise reduction.
[0013] In one embodiment, the second misaligned region is located below the first misaligned region. The beneficial effect here is that the two misaligned regions, distributed offset from all air inlets, alter the reflection and propagation paths of sound waves, reducing concentrated sound wave reflection and significantly improving noise reduction.
[0014] In one embodiment, the aperture of any of the through holes within the first misalignment region is D3, where 4mm ≤ D3 ≤ 6mm. The beneficial effect here is that by limiting the aperture D3 of each through hole within the first misalignment region to a preset range, and by designing the aperture of each through hole as needed, noise in different frequency bands can be attenuated, thereby increasing the noise reduction.
[0015] In one embodiment, at least two through holes are provided in the first misalignment region. All the through holes in the first misalignment region form at least two columns in the third direction. In the first misalignment region, the column spacing of two adjacent columns of through holes in the third direction is L1, 15mm≤L1≤25mm; and / or, all the through holes in the first misalignment region form at least two rows in the second direction. In the first misalignment region, the row spacing of two adjacent rows of through holes in the second direction is L2, 8mm≤L2≤12mm. The beneficial effect here is that, in the first misalignment region, by limiting the column spacing L1 of two adjacent columns of through holes in the third direction and / or the row spacing L2 of two adjacent rows of through holes in the second direction to a preset range, the row spacing and column spacing of each through hole can be designed as needed, which can attenuate noise in different frequency bands and further improve the noise reduction.
[0016] In one embodiment, the aperture of any of the through holes within the second misalignment region is D4, where 2mm ≤ D4 ≤ 4mm. The beneficial effect here is that by limiting the aperture D4 of each through hole within the second misalignment region to a preset range, and by designing the aperture of each through hole as needed, noise in different frequency bands can be attenuated, thereby increasing the noise reduction.
[0017] In one embodiment, at least two through holes are provided in the second misalignment region. All the through holes in the second misalignment region form at least two columns in the third direction. In the second misalignment region, the column spacing between two adjacent columns of through holes in the third direction is L3, where 6mm ≤ L3 ≤ mm; and / or, all the through holes in the second misalignment region form at least two rows in the second direction. In the second misalignment region, the row spacing between two adjacent rows of through holes in the second direction is L4, where 4mm ≤ L4 ≤ 6mm. The beneficial effect here is that, in the second misalignment region, by limiting the column spacing L3 of two adjacent columns of through holes in the third direction and / or the row spacing L4 of two adjacent rows of through holes in the second direction to a preset range, the row spacing and column spacing of each through hole can be designed as needed, which can attenuate noise in different frequency bands and further improve the noise reduction.
[0018] A gas water heater includes the aforementioned noise-reducing housing. In this gas water heater, a sound-insulating component is disposed on the side of the back panel facing the front panel, and a cavity communicating with the air inlet is formed between the sound-insulating component and the back panel. Noise generated during operation of the gas water heater is first transmitted to the cavity through an opening on the upper side of the cavity, then propagates through the cavity to the air inlet, and then propagates outwards through the air inlet. The cavity attenuates the noise, extending the noise propagation distance and reducing noise levels. Simultaneously, airflow is smooth when entering and exiting the cavity, significantly reducing airflow resistance, facilitating smoke extraction, and improving the situation where increased fan speed is required due to poor smoke extraction, leading to increased noise.
[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 plate away from the back panel 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, sufficient air intake is ensured to reduce outwardly radiated noise, while preventing airflow vortices from forming in the accommodating space between the panel and the back panel, and preventing a decrease in fan performance. Attached Figure Description
[0020] Figure 1 This is a rear view of a gas water heater in some embodiments of this application.
[0021] Figure 2 for Figure 1 The diagram shown is an exploded view of a gas water heater.
[0022] Figure 3 for Figure 2 The image shows a front view of a gas water heater.
[0023] Figure 4 for Figure 3 The diagram shows a front view of the noise reduction housing, air intake volute, and motor in the gas water heater.
[0024] Figure 5 for Figure 2 The exploded view shows the sound insulation components in the gas water heater.
[0025] Figure 6 This is an isometric view of the sound insulation panel of the sound insulation component in some embodiments of this application.
[0026] Figure 7 This is an isometric view of the sound insulation panel of the sound insulation component in some other embodiments of this application.
[0027] Figure 8 for Figure 7 The diagram shows the dimensions of the sound insulation panel.
[0028] Figure 9 The simulation diagram shows the airflow velocity vector of the gas water heater before and after optimization.
[0029] Figure 10 Simulation diagrams of airflow velocity streamlines in a gas water heater before and after optimization.
[0030] Figure 11 Sound pressure distribution diagrams of the gas water heater panel before and after optimization.
[0031] Figure label:
[0032] 10. Noise-reducing housing; 20. Air inlet volute; 30. Motor; 40. Air duct; 100. Outer shell; 110. Back panel; 111. Air inlet; 112. Cavity; 112a. Opening; 120. Panel; 200. Sound insulation component; 210. Sound insulation board; 211. Main body; 211a. First misalignment area; 211b. Second misalignment area; 212. Edge; 213. Through hole; 220. Noise-reducing component. Detailed Implementation
[0033] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are 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 this application. However, this application can be implemented 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 this application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0034] In the description of this application, 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", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.
[0035] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0036] In this application, unless otherwise expressly specified and limited, the terms "initial," "connected," "linked," and "fixed," 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 expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0037] In this application, unless otherwise expressly 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," "on top of," and "over" 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.
[0038] 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.
[0039] Please refer to Figures 1 to 3 In one embodiment, the noise-reducing housing 10 is used for a gas water heater. The noise-reducing housing 10 includes an outer shell 100 and a sound insulation component 200. The outer shell 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 form an accommodating space. The first direction is the thickness direction of the outer shell 100. The sound insulation component 200 is disposed on the side of the back plate 110 facing the accommodating space. The back plate 110 has an air inlet 111. A cavity 112 is formed between the sound insulation component 200 and the back plate 110. The cavity 112 communicates with the air inlet 111. The cavity 112 has an opening 112a on one side along a second direction. The second direction intersects with the first direction.
[0040] It should be noted that the first direction is Figure 2 The X direction shown is the thickness direction of the outer shell 100; the second direction is... Figure 2 The Z direction shown is the height direction of the outer shell 100.
[0041] Here, the sound insulation component 200 is located on the side of the back panel 110 facing the panel 120 and is housed within the receiving space.
[0042] The aforementioned noise-reducing housing 10 has a sound insulation component 200 disposed on the side of the back panel 110 facing the front panel 120. The sound insulation component 200 and the back panel 110 form a cavity 112 that communicates with the air inlet 111. When the gas water heater is working, the noise generated first passes through the opening on one side of the cavity 112 to the cavity 112, then through the cavity 112 to the air inlet 111, and then through the air inlet 111 to the outside. The cavity 112 attenuates the noise, extends the noise propagation distance, and reduces the noise. At the same time, the airflow can flow smoothly when entering and exiting the cavity 112, which greatly reduces the airflow resistance, facilitates smoke exhaust, and improves the situation where the fan speed needs to be increased due to poor smoke exhaust, which leads to increased noise.
[0043] In the embodiments of this application, the panel 120 is disposed on one side of the back plate 110 along the first direction. The panel 120 and the back plate 110 can be a separate structure, for example, the panel 120 and the back plate 110 can be detachably connected by means of snap-fit, plug-in or threaded connection; the panel 120 and the back plate 110 can also be an integral structure, for example, the panel 120 and the back plate 110 can be integrally formed by means of injection molding, casting or other methods. The panel 120 and the back plate 110 can have various structural forms, for example, the panel 120 can be a rectangular plate structure, the back plate 110 can be a U-shaped plate structure, and the back plate 110 and the panel 120 can form an accommodating space. Here, the fixing method and shape of the panel 120 and the back plate 110 are not limited.
[0044] In the embodiments of this application, the sound insulation component 200 is disposed on the side of the back panel 110 facing the panel 120. The sound insulation component 200 and the back panel 110 are separate structures, and the sound insulation component 200 and the back panel 110 are detachably connected by means of snap-fit, plug-in or threaded connection.
[0045] In the embodiments of this application, a cavity 112 is formed between the sound insulation component 200 and the back panel 110. The cavity 112 is connected to the air inlet 111, and the cavity 112 has an opening 112a on one side along the second direction. The opening 112a can be provided on the upper side or the lower side of the cavity 112, that is, the opening 112a is provided on the cavity 112 in the upward direction along the second direction, or the opening 112a is provided on the cavity 112 in the downward direction along the second direction.
[0046] For example, in Figure 2-4 In some embodiments shown, the cavity 112 has an opening 112a that is upward along the second direction. At this time, the air intake volute 20 and the motor 30 of the gas water heater are located below the combustion assembly. The cavity 112 can be a square cavity, a circular cavity or a cavity of other shapes with an upper opening 112a. The shape of the cavity 112 is not limited here.
[0047] For example, in other embodiments, a cavity 112 is formed between the sound insulation component 200 and the back plate 110. The cavity 112 has an opening 112a that is downward in the second direction. In this case, the air inlet volute 20 and the motor 30 of the gas water heater are disposed above the combustion component, and the air inlet 111 and the sound insulation component 200 are disposed on the side away from the back plate 110. The air inlet 111 and the sound insulation component 200 are disposed on the upper side of the back plate 110 near the air inlet volute 20. Furthermore, the back panel 110 includes a side panel along a second direction and a top panel along a first direction. A cavity 112 is formed between the sound insulation component 200 and the side panel, and the cavity 112 has an opening 112a extending downward along the second direction; or, a cavity 112 is formed between the sound insulation component 200, the side panel, and the top panel, and the cavity 112 has an opening 112a extending downward along the second direction; or, a cavity 112 is formed between the sound insulation component 200 and the top panel, and the cavity 112 has an opening 112a extending downward along the second direction. The sound insulation component 200 can be positioned according to the location of the air intake volute 20 and the motor 30, so that the noise from the air intake volute 20 and the motor 30 can be absorbed by the sound insulation component, reducing noise.
[0048] For details, please refer to Figures 1 to 3 The number of air inlets 111 is at least two, the sum of the opening areas of each air inlet 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 112a of the cavity 112 is also the flow area of the opening 112a of the cavity 112.
[0050] Here, the smaller the ratio of A1 / A2, the smaller the sum of the opening areas A1 of each air inlet 111, which will result in a smaller air intake and less noise radiated outwards; or, it means that the cross-sectional area A2 of the opening 112a of the cavity 112 is larger, making it less likely for the airflow to generate vortices in the accommodating space and the airflow direction to be more concentrated, but the noise radiated outwards is also greater.
[0051] Here, the larger the ratio of A1 / A2, the larger the sum of the opening areas A1 of each air inlet 111, the larger the air intake volume and the greater the noise radiated outwards; or, the smaller the cross-sectional area A2 of the opening 112a of the cavity 112, the easier it is for the airflow to generate vortices in the accommodating space, the more divergent the airflow direction, and the smaller the noise radiated outwards.
[0052] The beneficial effect here is that by limiting the ratio of A1 / A2 within a preset range, the intake volume can meet the design requirements, while also helping to reduce the noise radiated outwards.
[0053] In the embodiments of this application, the opening area of all air inlets 111 can be equal or unequal. When the opening area of all air inlets 111 is equal, the air intake can be distributed more evenly.
[0054] For more specific details, please refer to Figures 1 to 3 The cross-sectional area A2 of the opening 112a of cavity 112 ranges from 2800 mm². 2 ~3000mm 2 .
[0055] The beneficial effect here is that by limiting A2 within a preset range, the airflow within the containment space does not generate vortices, while also helping to reduce outward radiated noise.
[0056] In some embodiments of this application, the cross-sectional area A2 of the opening 112a of the cavity 112 is 2800 mm². 2 2850mm 2 2900mm 2 2950mm 2 3000mm 2 .
[0057] Please refer to Figure 4 and Figure 5 The sound insulation component 200 includes a sound insulation panel 210, which covers the side of the air inlet 111 facing the panel 120, and a cavity 112 is formed between the sound insulation panel 210 and the back panel 110.
[0058] It is understood that the sound insulation panel 210 is installed on the side of the air inlet 111 facing the panel 120, that is: the sound insulation panel 210 is installed on the side of the back panel 110 facing the panel 120 and covers the location of the air inlet 111, so that the cavity 112 formed between the sound insulation panel 210 and the back panel 110 can communicate with the air inlet 111.
[0059] The beneficial effect here is that a cavity 112 is formed between the sound insulation panel 210 and the back panel 110, which is connected to the air inlet 111. When the gas water heater is working, the noise generated first passes through the opening on the upper side of the cavity 112 to the cavity 112, then through the cavity 112 to the air inlet 111, and then through the air inlet 111 to spread outward. The cavity 112 attenuates the noise, extends the noise propagation distance, and reduces the noise.
[0060] In the embodiments of this application, the sound insulation panel 210 and the back panel 110 can be separate structures, for example, the sound insulation panel 210 and the back panel 110 can be detachably connected by means of snap-fit, plug-in or threaded connection; the sound insulation panel 210 and the back panel 110 can also be an integral structure, for example, the sound insulation panel 210 and the back panel 110 can be integrally formed by means of injection molding, casting or other methods. The sound insulation panel 210 can have various structural forms, for example, the back panel 110 can be a rectangular plate structure, the sound insulation panel 210 can be a U-shaped plate structure, and a cavity 112 with an upper opening 112a can be formed between the sound insulation panel 210 and the back panel 110. Here, the fixing method and shape of the sound insulation panel 210 and the back panel 110 are not limited.
[0061] Further, please refer to Figure 5 The sound insulation component 200 also includes a noise reduction component 220, which is disposed on the side of the sound insulation panel 210 away from the back panel 110.
[0062] The beneficial effect here is that the noise reduction component 220 is located on the side of the sound insulation panel 210 away from the back panel 110, which can absorb some noise and reduce noise.
[0063] In the embodiments of this application, the noise reduction component 220 and the sound insulation board 210 are separate structures, and the noise reduction component 220 and the sound insulation board 210 can be fixed by means of snap-fit, plug-in or adhesive.
[0064] In embodiments of this application, the noise reduction component 220 has a rectangular block structure to fit the sound insulation panel 210. The noise reduction component 220 may also have a circular or other shaped block structure. (Referring to...) Figure 5 The number of noise reduction components 220 is not limited to one. When the number of noise reduction components 220 is at least two, each noise reduction component 220 can move along the first direction (i.e., Figure 5 The X-direction layering is used to enhance noise reduction.
[0065] For a specific embodiment, please refer to Figure 5 The noise reduction component 220 is at least one of sound-absorbing cotton, sound-insulating foam, and damping layer.
[0066] The beneficial effect here is that it can absorb some noise and reduce noise levels.
[0067] In the embodiments of this application, the noise reduction component 220 can be any one of sound-absorbing cotton, sound-insulating foam, and damping layer, or at least two of sound-absorbing cotton, sound-insulating foam, and damping layer.
[0068] Furthermore, please refer to Figure 6 and Figure 3The sound insulation panel 210 includes a main body 211 and an edge portion 212 disposed outside the main body 211. The edge portion 212 is fixedly connected to the side of the back panel 110 facing the panel 120. The main body 211 is configured to protrude toward the panel 120 along a first direction, and a cavity 112 is formed between the main body 211 and the back panel 110.
[0069] It should be noted that, since the main body 211 is along the first direction (i.e. Figure 6 The main body 211 and the back panel 110 have sufficient space in the first direction to form a cavity 112. The edge portion 212 is provided on the outer periphery of the main body 211, and the sound insulation plate 210 is fixedly connected to the side of the back panel 110 facing the panel 120 through the edge portion 212.
[0070] The beneficial effects here are: the sound insulation panel 210 includes two parts, a main body 211 and an edge part 212. A cavity 112 is formed between the main body 211 and the back panel 110, and the sound insulation panel 210 is fixedly connected to the side of the back panel 110 facing the panel 120 through the edge part 212. This makes the overall structure of the sound insulation panel 210 compact and reasonably designed, without taking up too much space, thus improving the space utilization of the noise reduction housing 10.
[0071] In the embodiments of this application, the main body 211 and the edge 212 can be a separate structure, for example, the main body 211 and the edge 212 can be detachably connected by means of snap-fit, plug-in or threaded connection; the main body 211 and the edge 212 can also be an integral structure, for example, the main body 211 and the edge 212 can be integrally formed by means of injection molding, casting or other methods.
[0072] In the embodiments of this application, the main body 211 and the edge portion 212 can have various structural forms. For example, the main body 211 can have a U-shaped structure with an upper opening 112a, and the edge portion 212 can have 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 211 and the edge portion 212 are not limited.
[0073] Please refer to Figure 5 The number of air inlets 111 is at least two, and the main body 211 is provided with at least two through holes 213. All through holes 213 and all air inlets 111 are staggered. All air inlets 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 through holes 213 and all air inlets 111 are staggered, meaning that the projections of all through holes 213 and all air inlets 111 on the YZ plane do not overlap. When the gas water heater is operating, part of the noise is absorbed by the noise reduction component 220, and the other part is transmitted through the cavity 112 to the air inlet 111, and then propagates outward through the air inlet 111.
[0075] The beneficial effects here are as follows: by providing through holes 213 on the main body 211 of the sound insulation panel 210, and providing a noise reduction component 220 on the side of the main body 211 away from the back plate 110, the through holes 213 of the sound insulation panel 210 can absorb the noise in the cavity 112, and the noise reduction component 220 can also absorb the noise passing through the through holes 213 in the cavity 112; the noise reduction component 220 can also absorb the noise in the accommodating space, further reducing the noise. All air inlets 111 are formed in 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 air intake in the second direction and / or the third direction. In the embodiments of this application, all air inlets 111 are the same in shape and size to facilitate uniform air intake, for example, all air inlets 111 are waist-shaped holes of the same size and shape.
[0076] In the embodiments of this application, all through holes 213 have the same shape, and some through holes 213 have different sizes. For example, all through holes 213 are circular, some through holes 213 have a larger diameter, and other through holes 213 have a smaller diameter.
[0077] For more specific details, please refer to Figure 7 and Figure 5 The main body 211 has a first misaligned region 211a and a second misaligned region 211b that are misaligned with all the air inlets 111. At least one through hole 213 is provided in the second misaligned region 211b and the first misaligned region 211a respectively. The diameter of the at least one through hole 213 in the first misaligned region 211b is different from the diameter of the at least one through hole 213 in the second misaligned region 211a.
[0078] It should be noted that the third party is... Figure 7 The Y direction shown is the length direction of the outer shell 100.
[0079] The beneficial effect here is that by forming two misaligned areas on the main body 211 that are offset from all the air inlets 111, and by setting through holes 213 in the two misaligned areas respectively, the reflection and propagation path of the sound waves are changed, the concentrated reflection of the sound waves is reduced, and the noise reduction is greatly improved.
[0080] Please refer to Figure 7 and Figure 5 The second misalignment region 211b is located below the first misalignment region 211a.
[0081] The beneficial effect here is that the two misaligned zones and all the air inlets 111 are misaligned, 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.
[0082] In the embodiments of this application, the second misaligned region 211b is located below the first misaligned region 211a and is perpendicular to the first misaligned region 211a. The number of the first misaligned region 211a and the second misaligned region 211b is not limited to one; the number of the first misaligned region 211a and the second misaligned region 211b can be designed according to actual needs. For example, when the number of the first misaligned region 211a and the second misaligned region 211b is one, the first misaligned region 211a and the second misaligned region 211b form a T-shaped structure; when the number of the first misaligned region 211a is two and the number of the second misaligned region 211b is one, the first misaligned region 211a and the second misaligned region 211b form an I-shaped structure.
[0083] For a specific embodiment, please refer to Figure 7 and Figure 8 The diameter of any through hole 213 within the first misalignment zone 211a is D3, where 4mm≤D3≤6mm.
[0084] The beneficial effect here is that by limiting the aperture D3 of each through hole 213 in the first misalignment region 211a to a preset range, and by designing the aperture of each through hole as needed, noise in different frequency bands can be weakened, thereby increasing the noise reduction.
[0085] In the embodiments of this application, the diameters of the through holes 213 in the first misalignment region 211a are equal, which facilitates uniform noise reduction and effectively improves the noise reduction effect.
[0086] Please refer to Figure 7 and Figure 8 The first misalignment area 211a is provided with at least two through holes 213. All the through holes 213 in the first misalignment area 211a form at least two columns in the third direction. In the first misalignment area 211a, the column spacing of two adjacent columns of through holes 213 in the third direction is L1, 15mm≤L1≤25mm; and / or, all the through holes 213 in the first misalignment area 211a form at least two rows in the second direction. In the first misalignment area 211a, the row spacing of two adjacent rows of through holes 213 in the second direction is L2, 8mm≤L2≤12mm.
[0087] It should be noted that the second direction is Figure 7 The Z direction shown is the height direction of the outer shell 100; the third direction is... Figure 7 The Y direction shown is the length direction of the outer shell 100.
[0088] The beneficial effect here is that, within the first misalignment region 211a, by limiting the column spacing L1 of two adjacent columns of through holes 213 in the third direction and / or the row spacing L2 of two adjacent rows of through holes 213 in the second direction to a preset range, the row spacing and column spacing of each through hole can be designed as needed, thereby reducing noise in different frequency bands and further improving the noise reduction.
[0089] In the embodiments of this application, within the first misalignment area 211a, the column spacing of every two adjacent columns of through holes 213 in the third direction is equal and / or the row spacing of 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.
[0090] For a specific embodiment, please refer to Figure 7 and Figure 8 The diameter of any through hole 213 within the second misalignment zone 211b is D4, where 2mm ≤ D4 ≤ 4mm.
[0091] The beneficial effect here is that by limiting the aperture D4 of each through hole 213 in the second misalignment region 211b to a preset range, and by designing the aperture of each through hole as needed, noise in different frequency bands can be weakened, thereby increasing the noise reduction.
[0092] In the embodiments of this application, the apertures of each through hole 213 in the second misalignment region 211b are equal, which facilitates uniform noise reduction and effectively improves the noise reduction effect.
[0093] Please refer to Figure 7 and Figure 8 The second misalignment area 211b is provided with at least two through holes 213. All the through holes 213 in the second misalignment area 211b form at least two columns in the third direction. The column spacing of two adjacent columns of through holes 213 in the third direction is L3, 6mm≤L3≤10mm; and / or, all the 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 spacing of two adjacent rows of through holes 213 in the second direction is L4, 4mm≤L4≤6mm.
[0094] It should be noted that the second direction is Figure 7 The Z direction shown is the height direction of the outer shell 100; the third direction is... Figure 7 The Y direction shown is the length direction of the outer shell 100.
[0095] The beneficial effect here is that, within the second misalignment region 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 to a preset range, the row spacing and column spacing of each through hole can be designed as needed, thereby reducing noise in different frequency bands and further improving the noise reduction.
[0096] In the embodiments of this application, within the second misalignment region 211b, the column spacing of every two adjacent columns of through holes 213 in the third direction is equal and / or the row spacing of 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 aforementioned noise-reducing housing 10.
[0098] It should be noted that the gas water heater mentioned above also includes other components such as the air inlet volute 20, the motor 30, and the air duct 40. 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 ventilation duct 40. The air duct 40 is used for smoke exhaust. The motor 30 is connected to the fan blades inside the air inlet volute 20 and is used to drive the fan blades to rotate.
[0099] In the aforementioned gas water heater, the sound insulation component 200 is located on the side of the back panel 110 facing the front panel 120, and a cavity 112 is formed between the sound insulation component 200 and the back panel 110, which communicates with the air inlet 111. 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 propagated to the air inlet 111 through the cavity 112, and then propagated outward through the air inlet 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, facilitates smoke exhaust, and improves the situation where the fan speed needs to be increased due to poor smoke exhaust, which leads to increased noise.
[0100] For details, please refer to Figure 4 The gas water heater also includes an air inlet volute 20, which is located inside the outer casing 100; the cavity 112 has a dimension of D1 in the first direction, and the distance between the sound insulation plate 210 of the sound insulation component 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 cavity 112 in the first direction is the distance between the back panel 110 and the main body 211 of the sound insulation panel 210 in the first direction. The smaller the ratio of D1 / D2, the smaller the dimension D1 of cavity 112 in the first direction. The smaller the distance between cavities 112, the greater the airflow resistance and the smaller the air intake, which is not conducive to smoke exhaust. To achieve the same smoke exhaust effect, the fan speed must be increased, and the noise will also increase. The larger the ratio of D1 / D2, the larger the dimension D1 of cavity 112 in the first direction. This will lead to a crowded internal space of the outer shell 100 (that is, a smaller distance between the main body 211 of the sound insulation panel 210 and the air intake volute 20). Airflow vortices are more likely to be generated in the accommodating space formed between the panel 120 and the back panel 110, resulting in a decrease in fan performance.
[0102] The beneficial effects here are: by limiting the ratio of D1 / D2 within a preset range, sufficient air intake can be ensured to reduce outward radiated noise, while avoiding the generation of airflow vortices in the accommodating space formed between the panel 120 and the back panel 110, and preventing the fan performance from deteriorating.
[0103] In the embodiments of this application, the air inlet volute 20 of the gas water heater is disposed in the accommodating space formed between the panel 120 and the back panel 110. The air inlet volute 20 of the gas water heater is the main noise source when the gas water heater is working.
[0104] To investigate the effects of the unoptimized sound insulation cover (i.e., the prior art, with an opening on the back of the sound insulation cover) 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 of the gas water heater and the exhaust of the fan, simulation tests and comparisons were conducted on the relevant parameters of the gas water heater.
[0105] Figure 9 (a) is a simulation diagram of the airflow velocity vector of the gas water heater before optimization. Figure 9 (b) is the optimized airflow velocity vector simulation diagram of the gas water heater, from... Figure 9 (a) and Figure 9 (b) It can be seen that: before optimization, when the sound insulation cover was open behind it, an airflow vortex was generated behind the sound insulation cover, which would cause a significant decrease in the working performance of the fan; after optimization, when the sound insulation panel 210 was open on the upper side, no airflow vortex was generated, the airflow speed through the ventilation hole was more uniform, and the working performance of the fan was better.
[0106] Figure 10 (a) is a simulation diagram of the airflow velocity streamline of the gas water heater before optimization. Figure 10 (b) is a simulation diagram of the optimized airflow velocity streamline of the gas water heater, from... Figure 10 (a) and Figure 10(b) It can be seen that: before optimization, with the sound insulation cover plate open behind it, the airflow direction is divergent. The airflow is ejected from the opening. Part of the airflow moves to the front panel and then swirls upward before entering the fan volute. The other part moves to the front panel and then swirls downward before entering the fan volute. After optimization, with the sound insulation plate 210 open on the upper side, the airflow is ejected from the upper opening, moves upward along the back panel of the water heater, moves around the inner wall of the shell, and then enters the fan volute. The airflow direction is more concentrated, and it is less likely to cause mutual impact of airflow from multiple directions. The working performance of the fan is better.
[0107] Figure 11 (a) is a sound pressure distribution diagram in front of the panel of the gas water heater before optimization. Figure 11 (c) is a sound pressure distribution diagram on the side panel of the gas water heater before optimization. Figure 11 (b) is a sound pressure distribution diagram in front of the optimized gas water heater panel. Figure 11 (d) is the optimized sound pressure distribution diagram on the side panel of the gas water heater, from... Figure 11 (a)-11(d) show that: before optimization, with the sound insulation cover plate having an opening behind it, the sound pressure of the panel is mainly concentrated in the center of the front and sides of the panel, and the sound pressure distribution area is relatively large; after optimization, with the sound insulation plate 210 having an opening on the upper side, the sound pressure of the panel is mainly concentrated in the upper left of the front of the panel and the upper side of the side, and the sound pressure will be further away from the human ear, resulting in a better user experience.
[0108] Table 1 compares the exhaust airflow and total pressure efficiency of the gas water heater before and after optimization, obtained from simulation. As shown in Table 1, after optimization, with the upper opening of the sound insulation panel 210, the exhaust airflow of the gas water heater is 53.34 m³ / h. 3 / h, which is closer to the 53.78m of the exhaust vent of a gas water heater without a soundproof cover. 3 / h airflow rate; at the same time, after optimization, the total pressure efficiency of the water heater fan is also closer to that of the fan without the sound insulation cover, with a reduction of only 2.3%, which can achieve noise reduction of the gas water heater while minimizing the impact on the performance of the gas water heater fan.
[0109] Table 1
[0110]
[0111] 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.
[0112] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.
Claims
1. A noise-reducing housing (10) for a gas water heater, characterized in that, The noise-reducing housing (10) includes: The outer shell (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, and the front panel (120) and the back plate (110) form an accommodating space. The first direction is the thickness direction of the outer shell (100). A sound insulation component (200) is disposed on the side of the back panel (110) facing the accommodating space; The back panel (110) has an air inlet (111), and a cavity (112) is formed between the sound insulation component (200) and the back panel (110). The cavity (112) is connected to the air inlet (111), and the cavity (112) has an opening (112a) on one side along a second direction, which is the height direction of the outer shell (100).
2. The noise-reducing housing (10) according to claim 1, characterized in that, The number of air inlets (111) is at least two, the sum of the opening areas of each air inlet (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-reducing 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-reducing housing (10) according to claim 1, characterized in that, The sound insulation assembly (200) includes a sound insulation panel (210) which covers the side of the air inlet (111) facing the panel (120), and the cavity (112) is formed between the sound insulation panel (210) and the back panel (110).
5. The noise-reducing housing (10) according to claim 4, characterized in that, The sound insulation assembly (200) further includes a noise reduction component (220), which is disposed on the side of the sound insulation panel (210) away from the back panel (110).
6. The noise-reducing 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 damping layer.
7. The noise-reducing housing (10) according to any one of claims 4-6, characterized in that, The sound insulation panel (210) includes a main body (211) and an edge portion (212) disposed outside the main body (211). The edge portion (212) is fixedly connected to the side of the back panel (110) facing the panel (120). The main body (211) is configured to protrude toward the panel (120) along the first direction, and the cavity (112) is formed between the main body (211) and the back panel (110).
8. The noise-reducing housing (10) according to claim 7, characterized in that, The number of air inlets (111) is at least two, and the main body (211) is provided with at least two through holes (213). All the through holes (213) are staggered with all the air inlets (111). All the air inlets (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 but are not coplanar.
9. The noise-reducing housing (10) according to claim 8, characterized in that, The main body (211) has a first misaligned region (211a) and a second misaligned region (211b) that are misaligned with all the air inlets (111). At least one through hole (213) is provided in the second misaligned region (211b) and the first misaligned region (211a). The diameter of at least one through hole (213) in the first misaligned region (211b) is different from the diameter of at least one through hole (213) in the second misaligned region (211a).
10. The noise-reducing housing (10) according to claim 9, characterized in that, The second misalignment region (211b) is located below the first misalignment region (211a).
11. The noise-reducing housing (10) according to claim 9, characterized in that, The diameter of any of the through holes (213) in the first misalignment region (211a) is D3, where 4mm≤D3≤6mm.
12. The noise-reducing housing (10) according to claim 9, characterized in that, The first misalignment area (211a) is provided with at least two through holes (213), and all the through holes (213) in the first misalignment area (211a) form at least two columns in the third direction. In the first misalignment area (211a), the column distance between two adjacent columns of through holes (213) in the third direction is L1, 15mm≤L1≤25mm; And / or, all the through holes (213) in the first misalignment area (211a) form at least two rows in the second direction, and in the first misalignment area (211a), the row spacing of two adjacent rows of through holes (213) in the second direction is L2, 8mm≤L2≤12mm.
13. The noise-reducing housing (10) according to claim 9, characterized in that, The diameter of any of the through holes (213) in the second misalignment region (211b) is D4, where 2mm≤D4≤4mm.
14. The noise-reducing housing (10) according to claim 9, characterized in that, The second misalignment area (211b) is provided with at least two through holes (213). All the 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 distance between two adjacent columns of through holes (213) in the third direction is L3, 6mm≤L3≤10mm. And / or, all the through holes (213) in the second misalignment area (211b) form at least two rows in the second direction, and the row spacing of two adjacent rows of through holes (213) in the second direction is L4, 4mm≤L4≤6mm.
15. A gas-fired water heater, characterized in that, Includes the noise-reducing housing (10) as described in any one of claims 1-14.
16. The gas water heater according to claim 15, characterized in that, The gas water heater also includes an air inlet volute (20), which is disposed inside the outer casing (100); The cavity (112) has a dimension D1 in the first direction, and the distance between the sound insulation plate (210) of the sound insulation component (200) away from the back plate (110) and the air intake volute (20) in the first direction is D2, 0.2≤D1 / D2≤0.3.