Shell structure and gas water heater

Abstract

The utility model relates to the technical field of gas water heaters, and discloses a shell structure and a gas water heater. The shell structure comprises a back plate and an inner cover plate, and the back plate is provided with an air inlet; the inner cover plate is arranged on the inner side of the back plate, an air inlet cavity is defined by the inner cover plate and the back plate, and an air outlet is formed in the inner cover plate; the air inlet and the air outlet are arranged in a staggered mode in the left-right direction and communicate with the air inlet cavity. In the front-back direction, the circulation sectional area of the air inlet corresponding to the air inlet cavity is smaller than the circulation sectional area of the air outlet corresponding to the air inlet cavity. According to the utility model, the problems that the noise reduction effect is poor and the sound channel cover plate is easy to vibrate due to harmonic vibration caused by excitation can be effectively solved, the stress vibration formed by excitation during air intake is effectively reduced, and the noise is further effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of gas water heaters, in particular to a shell structure and a gas water heater. Background Art

[0002] With the trend toward smaller homes and the widespread adoption of silent operation, users are increasingly concerned about the noise levels of gas water heaters. The main noise levels of gas water heaters include combustion noise, aerodynamic noise, fan noise, and water flow noise. Currently, noise reduction efforts in the gas water heater sector focus on improving the noise transmission path, primarily by enhancing the sealing of the housing, installing sound-absorbing components to absorb high- and low-frequency noise, and installing extended air inlet channels to attenuate noise.

[0003] The housing is provided with an extended air inlet channel, where a cover plate is installed on the inner side of the back panel of the gas water heater to form an air inlet cavity. The back panel is provided with an air inlet, and the cover plate is provided with an air outlet. Air flows in from the air inlet, passes through the air inlet cavity, and flows out of the air outlet to supply combustion to the burner. This achieves the purpose of attenuating noise through reflection, refraction, and diffraction of sound in the propagation path of the air inlet cavity. However, when the gas water heater is operating under high load, when air flows from the air inlet cavity to the air outlet, the high air flow rate and the edge of the air outlet can easily cause harmonic vibration and produce a whistling noise.

[0004] Therefore, there is an urgent need for a shell structure and a gas water heater to solve the above problems. Utility Model Content

[0005] One of the technical problems solved by the present invention is to provide a shell structure which can effectively solve the problem of large air intake noise during the operation of the gas water heater.

[0006] The second technical problem solved by the present invention is to provide a gas water heater, which can effectively solve the problem of large air intake noise during the operation of the gas water heater, making the operation process quieter and providing a better user experience.

[0007] The first technical problem mentioned above is solved by the following technical solution:

[0008] A housing structure comprising:

[0009] a back plate, the back plate being provided with an air inlet;

[0010] An inner cover plate is arranged on the inner side of the back plate and is combined with the back plate to form an air inlet cavity, and the inner cover plate is provided with an air outlet; along the left and right directions, the air inlet and the air outlet are staggered and respectively communicated with the air inlet cavity; along the front and back directions, the position of the air inlet corresponds to a flow cross-sectional area of ​​the air inlet cavity which is smaller than the position of the air outlet corresponds to a flow cross-sectional area of ​​the air inlet cavity.

[0011] The shell structure has the beneficial effects compared with the background art:

[0012] The utility model discloses a shell structure, and compared with the background art, has the beneficial effects of: Specifically, along the left and right direction, the air inlet and the air outlet are staggered, and along the front and back direction, the flow area of the air inlet is less than that of the air outlet. This arrangement can extend the air flow distance and effectively slow down the air flow speed, so that the air transfer path is increased, the whistling sound caused by the structure edge cutting of the fast flow speed is avoided, and the turbulence formed by the impact on the local area is reduced, thereby attenuating the aerodynamic noise.

[0013] In one embodiment, the back plate is provided with a first convex bump protruding towards the mounting plane, and the air inlet is arranged on the first convex bump; and the inner cover plate is arranged on the first convex bump to form the air inlet cavity.

[0014] In one embodiment, the inner cover plate is further provided with a second convex bump protruding towards the direction away from the first convex bump, and the second convex bump and the air outlet are staggered; and the flow area of the second convex bump corresponding to the air inlet cavity is less than that of the air outlet.

[0015] In one embodiment, the inner cover plate is further provided with a third convex bump and a fourth convex bump protruding towards the direction away from the first convex bump, and the third convex bump and the fourth convex bump are arranged on the left and right sides of the second convex bump respectively; and the third convex bump and the fourth convex bump are provided with the air outlet.

[0016] In one embodiment, the depth h1 of the third convex bump and the fourth convex bump is set to 3mm-10mm; and the depth h2 of the first convex bump is set to 8mm-12mm.

[0017] In one embodiment, the shell structure includes a mounting plate, and the mounting plate includes a first connecting plate, a support plate and a second connecting plate connected in sequence, and the first connecting plate is connected with the back plate; along the front and back direction, the length of the support plate is greater than the depth of the first convex bump, and the second connecting plate is connected with the mounting plane.

[0018] In one embodiment, the air inlet and the air outlet are both set as long circular holes, and the air inlet and the air outlet are arranged at an angle in the extension direction.

[0019] In one of the embodiments, the shell structure further comprises two mounting side plates and a sealing strip, the mounting side plates are arranged on the left and right sides of the back plate;

[0020] In the front-rear direction, the mounting side plate away from the back plate side is provided with a sealing groove, and the sealing strip is arranged in the sealing groove.

[0021] In one of the embodiments, the inner cover plate is detachably connected with the back plate.

[0022] The second technical problem is solved by the following technical scheme:

[0023] A gas water heater comprises the shell structure according to any one of the above solutions.

[0024] Compared with the background art, the gas water heater has the beneficial effects that:

[0025] The gas water heater provided with the shell structure has smaller noise during use, and thus the user experience is better. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present application and the drawings without creative labor.

[0027] Figure 1 is an exploded schematic view of the shell structure provided by the embodiment of the present application;

[0028] Figure 2 is a schematic view of the noise propagation in the shell structure provided by the embodiment of the present application

[0029] Figure 3 is a partial structure sectional view of the shell structure provided by the embodiment of the present application;

[0030] Figure 4 is a structure schematic view of the inner cover plate provided by the embodiment of the present application;

[0031] Figure 5 is a partial structure schematic view of the mounting side plate of the shell structure provided by the embodiment of the present application.

[0032] Label explanation:

[0033] 1, mounting plane;

[0034] 100, back panel; 110, first convex bump; 111, air inlet;

[0035] 200, inner cover; 210, second convex bump; 220, third convex bump; 221, air outlet; 230, fourth convex bump;

[0036] 310, install the side panel; 311, seal groove; 320, seal strip;

[0037] 400, mounting plate; 410, first connecting plate; 420, supporting plate; 430, second connecting plate. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0039] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0040] The terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first," "second," "third," or "fourth" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0041] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0042] like Figure 1-Figure 5As shown, this embodiment provides a shell structure, which includes a back plate 100 and an inner cover plate 200, the back plate 100 is provided with an air inlet 111; the inner cover plate 200 is arranged on the inner side of the back plate 100, and is enclosed with the back plate 100 to form an air inlet cavity, and the inner cover plate 200 is provided with an air outlet 221; along the left and right directions, the air inlet 111 and the air outlet 221 are staggered and respectively connected to the air inlet cavity; along the front and back directions, the flow cross-sectional area of ​​the air inlet cavity corresponding to the position of the air inlet 111 is smaller than the flow cross-sectional area of ​​the air inlet cavity corresponding to the position of the air outlet 221.

[0043] An air inlet cavity is formed by setting an inner cover plate 200 on the inner side of the back plate 100 and enclosing it with the back plate 100; air enters the air inlet cavity through the air inlet 111, and then enters the shell structure through the air outlet 221. Specifically, the air inlet 111 and the air outlet 221 are staggered in the left-right direction. In the front-back direction, the flow cross-sectional area of ​​the air inlet cavity corresponding to the position of the air inlet 111 is smaller than the flow cross-sectional area of ​​the air inlet cavity corresponding to the position of the air outlet 221. Such a setting can extend the distance of air circulation and effectively reduce the air flow speed. While increasing the air transfer path, it can also avoid the whistling sound caused by the excessively fast flow being cut by the edge of the structure. At the same time, the slowing of the flow speed can also reduce the turbulence formed by the impact on the local area, thereby attenuating the aerodynamic noise.

[0044] This embodiment also discloses a gas water heater comprising a housing structure according to any of the above schemes. A gas water heater equipped with this housing structure exhibits lower noise levels during use, resulting in a better user experience. Experimental comparisons revealed that a 16L gas water heater model without the housing structure had a nominal load combustion noise level of 52dB, while the noise level was reduced to 46.5dB after incorporating the housing structure.

[0045] Specifically, the back panel 100 is provided with a first convex hump 110 projecting toward the mounting surface 1. The first convex hump 110 is provided with an air inlet 111. The inner cover 200 covers the first convex hump 110 to form an air inlet cavity. Providing the first convex hump 110 on the back panel 100 increases the volume of the air inlet cavity, thereby more effectively mitigating airflow velocity.

[0046] Furthermore, the inner cover plate 200 is provided with second convex bumps 210 arranged in a crisscross pattern, facing away from the first convex bumps 110. The second convex bumps 210 are staggered with the air outlet 221; the cross-sectional area of ​​the air inlet cavity corresponding to the position of the second convex bumps 210 is smaller than the cross-sectional area of ​​the air inlet cavity corresponding to the position of the air outlet 221. The provision of the second convex bumps 210 can effectively channel turbulence in a localized area, thereby reducing aerodynamic noise. It can also prevent the inner cover plate 200 from being stimulated to vibrate harmonically, thereby reducing composite noise. In addition, the provision of the second convex bumps 210 facing away from the first convex bumps 110 helps increase the volume of the air inlet cavity, avoids excessive airflow velocity caused by a small distance between the first convex bumps 110 and the mounting surface 1, and helps reduce airflow velocity. Optionally, the second convex bumps 210 are in a crisscross pattern, which helps improve the strength of the inner cover plate 200. This allows the vibration transmitted to the inner cover plate 200 to be effectively attenuated by the crisscross-shaped second convex bumps 210, thereby reducing sinusoidal harmonic vibration.

[0047] Furthermore, if Figure 3 and Figure 4 As shown, the inner cover plate 200 is further provided with a third bulge 220 and a fourth bulge 230 protruding in a direction away from the first bulge 110. The third bulge 220 and the fourth bulge 230 are respectively provided on the left and right sides of the second bulge 210, and the third bulge 220 and the fourth bulge 230 are both provided with air outlets 221. Such a configuration allows air to selectively enter the interior of the shell structure through the left and right sides of the second bulge 210.

[0048] For example, Figure 3 and Figure 4 As shown, the depth h1 of the third convex hump 220 and the fourth convex hump 230 is greater than the depth of the second convex hump 210 and is set to 3mm-10mm; accordingly, the depth h2 of the first convex hump 110 is set to 8mm-12mm, which can effectively adapt the air intake volume and air intake resistance, while ensuring that the air volume required by the gas water heater is met and reducing noise.

[0049] like Figure 2 and Figure 3 As shown, the composite noises such as combustion noise, water pump noise, and fan exhaust noise generated by the gas water heater during operation propagate outward in the opposite direction of the air propagation path of the shell structure, and are reflected, refracted, and diffracted after experiencing the ups and downs of multiple convex hulls on the extended path of the air inlet cavity, thereby achieving partial energy attenuation and effectively reducing the noise energy value.

[0050] In the embodiment, the shell structure comprises a mounting plate 400, the mounting plate 400 comprises a first connecting plate 410, a supporting plate 420 and a second connecting plate 430 connected in sequence, the first connecting plate 410 is connected with the back plate 100, the length of the supporting plate 420 is greater than the depth of the first convex block 110, so that the first convex block 110 can have a spacing with the mounting plane 1, and the second connecting plate 430 is connected with the mounting plane 1. Optionally, the length L of the second connecting plate 430 is set to 15 mm. It can be understood that the mounting plate 400 needs to ensure the spacing between the first convex block 110 and the mounting plane 1 while achieving the mounting between the back plate 100 and the mounting plane 1. In the embodiment, the first connecting plate 410 and the supporting plate 420, and the supporting plate 420 and the second connecting plate 430 are all arranged vertically, so the spacing between the first convex block 110 and the mounting plane 1 is the difference between the length L of the second connecting plate 430 and the depth h2 of the first convex block 110.

[0051] Preferably, the air inlet 111 and the air outlet 221 are both set as long circular holes, and both are provided with a plurality of long circular holes, which is beneficial to effectively and uniformly distribute the air flow while ensuring the air flow, and reduce the air flow resistance; at the same time, the long circular hole design can avoid the local flow rate mutation caused by the cutting of the edge area, and ensure that the air flow rates are similar everywhere. In addition, the air inlet 111 and the air outlet 221 are arranged at an angle with respect to the extension direction, which is beneficial to prolong the propagation path of the noise and weaken its propagation energy, thereby improving the noise reduction effect; at the same time, it also has a certain flow effect, avoids the generation of turbulent flow, and further slows down the aerodynamic noise.

[0052] Specifically, as shown in Figure 1 and Figure 5 The shell structure further comprises two mounting side plates 310 arranged on the left and right sides of the back plate 100. By arranging the two mounting side plates 310, the problem that the noise is intensified due to the leakage of air through the two sides of the shell structure and the mounting plane 1 and the repeated radiation of the air outward through the mounting plane 1 can be effectively avoided, and the radiation noise is effectively reduced. After the mounting side plates 310 are arranged, when the noise propagates outward through the shell structure, the radiation amount of the noise on the left and right sides is effectively blocked due to the blocking of the mounting side plates 310, and then the noise can only be transmitted in the upward and downward directions, and the length of the shell structure in the upward and downward directions is relatively long, so the reflection time on the propagation path is longer; in addition, the back plate 100 is further provided with a plurality of embossing at different heights on the upward and downward propagation paths, which further attenuates the energy of the noise, thereby greatly improving the noise reduction effect.

[0053] Furthermore, the shell structure also includes a sealing strip 320. Along the front-to-back direction, a sealing groove 311 is provided at one end of the mounting side panel 310 away from the back panel 100. After installation, the sealing strip 320 is disposed in the sealing groove 311 and can be tightly pressed against the mounting plane 1, thereby achieving leakage blocking on the left and right sides between the back panel 100 and the mounting plane 1. Optionally, as Figure 2 After installation, when the deformation of sealing strip 320 reaches 20%, the sealing effect is good, effectively filling the leakage areas on both sides and reducing the amount of noise leakage. Sealing strip 320 can be made of a high-density elastic material such as rubber to ensure durability while improving sealing. It also has better flexibility, a longer service life, and is less affected by temperature.

[0054] Preferably, the inner cover plate 200 is detachably connected to the back plate 100. For example, the inner cover plate 200 and the back plate 100 are connected by screws, which is convenient to connect, has good reliability, and can be repeatedly disassembled.

[0055] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features 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.

[0056] The specific contents of the above-mentioned specific embodiments only express several embodiments of the present invention. Although the description is relatively specific and detailed, it should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be based on the appended claims.

Claims

1. Shell structure, characterized in that, include: A back plate (100), wherein the back plate (100) is provided with an air inlet (111); An inner cover plate (200) is arranged on the inner side of the back plate (100) and encloses the back plate (100) to form an air inlet cavity, and the inner cover plate (200) is provided with an air outlet (221); along the left-right direction, the air inlet (111) and the air outlet (221) are staggered and respectively communicated with the air inlet cavity; along the front-back direction, the flow cross-sectional area of ​​the air inlet cavity corresponding to the position of the air inlet (111) is smaller than the flow cross-sectional area of ​​the air inlet cavity corresponding to the position of the air outlet (221).

2. The housing structure according to claim 1, wherein: The back plate (100) is provided with a first convex bump (110) protruding toward the installation plane (1), and the air inlet (111) is provided on the first convex bump (110); the inner cover plate (200) is covered on the first convex bump (110) to form the air inlet cavity.

3. The housing structure according to claim 2, wherein: The inner cover plate (200) is further provided with a second convex hump (210) crisscrossed and convexly arranged in a direction away from the first convex hump (110), and the second convex hump (210) and the air outlet (221) are staggered; the flow cross-sectional area of ​​the air inlet cavity corresponding to the position of the second convex hump (210) is smaller than the flow cross-sectional area of ​​the air inlet cavity corresponding to the position of the air outlet (221).

4. The housing structure according to claim 3, wherein: The inner cover plate (200) is further provided with a third convex hump (220) and a fourth convex hump (230) convexly arranged in a direction away from the first convex hump (110), the third convex hump (220) and the fourth convex hump (230) being respectively arranged on the left and right sides of the second convex hump (210); the third convex hump (220) and the fourth convex hump (230) are both provided with the air outlet (221).

5. The housing structure according to claim 4, characterized in that: The depth h1 of the third convex hump (220) and the fourth convex hump (230) is set to 3 mm-10 mm; the depth h2 of the first convex hump (110) is set to 8 mm-12 mm.

6. The housing structure according to claim 2, wherein: The shell structure includes a mounting plate (400), the mounting plate (400) including a first connecting plate (410), a support plate (420) and a second connecting plate (430) connected in sequence, the first connecting plate (410) being connected to the back plate (100); along the front-to-back direction, the length of the support plate (420) is greater than the depth of the first convex bump (110), and the second connecting plate (430) is connected to the mounting plane (1).

7. The housing structure according to claim 1, wherein: The air inlet (111) and the air outlet (221) are both configured as oblong holes, and the air inlet (111) and the air outlet (221) are configured such that their extending directions form an angle.

8. The housing structure according to claim 1, wherein: The housing structure further comprises two mounting side panels (310) and a sealing strip (320), wherein the mounting side panels (310) are arranged on the left and right sides of the back panel (100); Along the front-to-back direction, a sealing groove (311) is provided on a side of the mounting side plate (310) away from the back plate (100), and the sealing strip (320) is provided in the sealing groove (311).

9. The housing structure according to claim 1, wherein: The inner cover plate (200) is detachably connected to the back plate (100).

10. Gas water heater, characterized in that The invention comprises a housing structure according to any one of claims 1 to 9.

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