Noise reduction device and gas water heater

Abstract

The utility model belongs to the technical field of gas water heaters, and particularly relates to a noise reduction device and a gas water heater. According to the characteristic that noise is transmitted from the air inlet, the noise reduction device which is simple in structure, good in air circulation and remarkable in sound absorption effect is provided. Specifically, in view of the fact that the noise transmitted from the air inlet is mainly diffused outwards in the direction perpendicular to the air inlet, the applicant effectively blocks most of the noise transmitted in the directions by arranging the cover plate at the corresponding position of one side of the air inlet. Furthermore, an avoiding opening is formed in a specific position between the cover plate in the noise reduction cavity and the bottom shell, so that the smoothness of air circulation is ensured, noise sound waves propagating in other directions in the cavity can be reflected in the noise reduction cavity, the path of noise exhausted from the air inlet is prolonged, and the noise intensity is weakened. By means of the design, the efficient noise reduction effect is achieved while the ventilation efficiency is guaranteed, and optimal balance between noise reduction and ventilation is achieved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of gas water heaters, and particularly relates to a noise reduction device for reducing the running noise of a gas water heater, and a gas water heater using the noise reduction device. BACKGROUND

[0002] In recent years, gas water heaters have been increasingly adopted by more and more families due to their convenience and high efficiency. However, as the popularity rate increases, the equipment running noise problem has gradually become the focus of users. This phenomenon not only affects the daily life experience of users, but also may cause disturbance to other members in the living environment.

[0003] The noise sources of a gas water heater are various, mainly including fan noise, combustion noise, and flue gas impact flue wall noise, etc. As an important part of a gas water heater, the fan drives air flow in the working process to ensure sufficient oxygen supply for combustion. However, the rotating movement of the fan inevitably produces mechanical noise, which is particularly obvious when the equipment starts or stops. The combustion noise is caused by the instantaneous pressure change when the mixed gas and air are ignited, and especially when the combustion is incomplete, a more intense explosion sound may be produced. In addition, the collision between flue gas and flue wall during the flue gas discharge process also produces certain impact noise. The above noise is transmitted from the inside of the gas water heater to the outside, and the air inlet on the shell is the main noise transmission channel.

[0004] In view of the technical problem of large running noise of a gas water heater caused by the air inlet, various design schemes of noise reduction devices have appeared on the current market. Among them, prolonging the transmission path of noise sound waves is a relatively common method, for example, a hole plate staggered with the air inlet is arranged inside the shell, which uses the hole plate as the first barrier for sound wave propagation to weaken the noise first. The design of the hole plate usually considers the frequency characteristics of the sound wave, and through a specific hole diameter and arrangement, it can effectively reflect or absorb part of the high-frequency noise, thereby reducing the energy transmitted to the outside. On this basis, by reasonably planning the path between the hole plate position and the air inlet, the transmission distance of the sound wave is further prolonged, so that the sound energy is more attenuated in the transmission process. This multi-stage noise reduction design not only effectively reduces the noise transmitted from the air inlet, realizes the effect of noise reduction, but also can further improve the noise reduction performance by combining the application of sound-absorbing materials. However, the air inlet is not only the main channel for the transmission of noise sound waves, but more importantly, it also serves as the air supply inlet. Therefore, when trying to reduce noise by prolonging the transmission path of noise sound waves, it may hinder the air circulation, thereby affecting the overall operation performance of the equipment. UTILITY MODEL CONTENT

[0005] To solve the above technical problems, the application provides a noise reduction device which can reduce the operation noise of a gas water heater while ensuring the air circulation effect, and is realized by the following technical solutions.

[0006] The noise reduction device comprises a cavity, an air inlet is arranged on the bottom shell of the cavity, a cover plate is arranged on any side of the air inlet, a connecting plate is arranged to fix the cover plate on one side of the air inlet, and a noise reduction cavity is formed by the cover plate and the connecting plate, an avoiding opening is arranged on the noise reduction cavity and between the cover plate and the bottom shell.

[0007] Preferably, the noise reduction device further comprises an acoustic panel arranged on the side of the cover plate close to the inside of the cavity.

[0008] Preferably, the avoiding opening is arranged on the side of the connecting plate close to the long side of the cover plate.

[0009] Preferably, the connecting plate comprises a support plate arranged between the cover plate and the bottom shell.

[0010] Preferably, the connecting plate further comprises a fixing plate arranged to be connected with the bottom shell, and the fixing plate is fixedly connected with the support plate.

[0011] Preferably, the cover plate is arranged inside the cavity, and the inner wall of the noise reduction cavity is provided with acoustic material.

[0012] Preferably, the cover plate is arranged outside the cavity, and the inner wall of the connecting plate is provided with acoustic material.

[0013] Preferably, the acoustic material is polyester fiber.

[0014] A gas water heater comprises the noise reduction device described in any one of the above.

[0015] Preferably, the fan of the gas water heater is arranged on the side close to the avoiding opening.

[0016] Compared with the prior art, the application has the following beneficial effects:

[0017] The present application proposes a noise reduction device with simple structure, good air circulation and significant sound absorption effect according to the characteristics of noise propagation from the air inlet. Specifically, since the noise emitted from the air inlet mainly spreads outward in the direction perpendicular to the air inlet, the applicant sets a cover plate at the corresponding position on one side of the air inlet, effectively blocking most of the noise propagating in these directions. Further, by setting an escape opening at a specific position between the cover plate and the bottom shell in the noise reduction cavity, not only the smoothness of air circulation is ensured, but also the noise sound waves propagating in other directions inside the cavity can form reflection in the noise reduction cavity, prolonging the path of noise emission from the air inlet, thereby weakening the noise intensity. This design not only ensures the ventilation efficiency, but also achieves high-efficiency noise reduction effect, achieving an optimized balance between noise reduction and ventilation.

[0018] The present application can effectively absorb the noise propagating to the cover plate by setting the sound absorption panel at the position of the cover plate close to the inside of the cavity. Specifically, when the noise reduction cavity is set inside the cavity, the sound absorption panel is set on the outer wall of the cover plate, and the noise propagating vertically to the cover plate first contacts the sound absorption panel, part of which is absorbed, thereby directly reducing the noise to be emitted inside the cavity. When the noise reduction cavity is set outside the cavity, the sound absorption panel is set on the inner wall of the cover plate, and the noise propagating vertically to the sound absorption panel will be partially absorbed, and the rest will be reflected to the inner wall of the noise reduction cavity, achieving noise reduction, so the noise finally emitted through the escape opening is smaller.

[0019] By setting the escape opening on the side of the connecting plate close to the long side of the cover plate, on the one hand, this design avoids the problem that when the escape opening is directly set on the cover plate, the noise perpendicular to the cover plate will directly propagate through the cover plate, causing excessive noise. On the other hand, setting the escape opening at this specific position on the side of the connecting plate close to the long side of the cover plate can ensure that air can flow more smoothly into the cavity, reducing air resistance at the inlet. In addition, the direction of air flow from the escape opening is opposite to the direction of noise propagation, and this air flow can further weaken the outward transmission of noise.

[0020] By setting the support plate between the cover plate and the bottom shell on the connecting plate, not only the ventilation effect of the air inlet is significantly improved, but also the noise reduction performance is enhanced. Specifically, on the one hand, the design of the support plate ensures that air can flow more smoothly into the cavity, reducing air resistance at the inlet. This not only improves the air circulation efficiency, but also ensures sufficient supply of oxygen required for combustion. On the other hand, the presence of the support plate increases the physical space inside the noise reduction cavity, so that the sound waves need to pass through a longer and more complex path to reach the air outlet during propagation. This design effectively prolongs the reflection path of sound waves and increases the opportunity for sound waves to attenuate inside the cavity, thereby significantly reducing the amount of noise leakage.

[0021] The present application significantly enhances the connection stability between the cover plate, the connecting plate and the bottom shell by introducing the fixed plate, effectively reduces the mechanical vibration of these components caused by airflow impact, thereby significantly reducing the noise during equipment operation. Specifically, the presence of the fixed plate strengthens the rigid connection between the components, ensuring that the cover plate, the connecting plate and the bottom shell do not displace or vibrate during the introduction of the airflow, thereby avoiding the mechanical noise caused thereby. In addition, the fixed plate not only plays a reinforcing role, but also can absorb and disperse the vibration energy caused by the airflow, reducing the transmission of vibration to other components, further reducing the overall noise level.

[0022] The present application significantly enhances the noise reduction effect by providing sound-absorbing material inside the noise reduction cavity. Specifically, the presence of sound-absorbing material increases the complexity of the sound wave propagation path. When noise sound waves propagate in the noise reduction cavity, not only will they be reflected inside the cavity, but part of the sound wave energy will be absorbed by the sound-absorbing material. Therefore, the noise emitted from the cavity is smaller.

[0023] The gas water heater of the present application reduces the noise emitted from the cavity by cleverly using the airflow generated by the fan attraction to produce a reverse impact on the noise, thereby reducing the noise emitted from the cavity. Specifically, the strong suction of the fan forms a directional airflow barrier that can directly interfere and hinder the propagation of noise along a straight path. When noise sound waves try to propagate outward from the inside of the cavity, the oncoming airflow will form a reverse impact on them, weakening their energy and changing their propagation direction. BRIEF DESCRIPTION OF DRAWINGS

[0024] For the sake of clarity, the drawings will be briefly introduced as follows:

[0025] Figure 1 Part structure schematic diagram of the noise reduction device of Example 1;

[0026] Figure 2 Explosion diagram of part structure of the noise reduction device of Example 1;

[0027] Figure 3 Side view of the noise reduction device of Example 1;

[0028] Figure 4 Part structure schematic diagram of the noise reduction device of Example 2;

[0029] Reference signs: 100, cavity, 110, bottom shell, 120, air inlet, 200, cover plate, 300, connecting plate, 310, support plate, 320, fixed plate, 400, noise reduction cavity, 410, avoidance port, 500, sound-absorbing panel. DETAILED DESCRIPTION

[0030] The utility model will be further described below in conjunction with the drawings and specific embodiments. Those skilled in the art will be able to realize the utility model based on these descriptions. In addition, the embodiments of the utility model involved in the following description are generally only a part of the embodiments of the utility model, not all embodiments. Therefore, based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the utility model.

[0031] Embodiment 1

[0032] The embodiment provides a noise reduction device, which comprises:

[0033] The cavity 100 is provided with an air inlet 120 on the bottom shell 110, and air is introduced into the cavity 100 from the air inlet 120. The cavity 100 forms noise inside, and the noise is propagated outward from the air inlet 120.

[0034] The cover plate 200 is correspondingly arranged on the side of the air inlet 120 close to the inside of the cavity 100. By arranging the cover plate 200 on the corresponding position on one side of the air inlet 120, the propagation of most of the noise vertically or obliquely passing through the air inlet 120 is effectively blocked. In the embodiment, the cover plate 200 is rectangular.

[0035] The connecting plate 300 is used for fixing the cover plate 200 on one side of the air inlet 120, and comprises a supporting plate 310 arranged between the cover plate 200 and the bottom shell 110, and a fixed plate 320 fixedly connected with the supporting plate 310 and connected with the bottom shell 110. The connecting plate 300 and the cover plate 200 form a noise reduction cavity 400, and the noise reduction cavity 400 is provided with an avoiding opening 410 arranged between the cover plate 200 and the bottom shell 110. Specifically, in the embodiment, the avoiding opening 410 is arranged on one side of the connecting plate 300 close to the long side of the cover plate 200. The noise reduction cavity 400 is provided with sound-absorbing material, which is arranged on the supporting plate 310 and the cover plate 200 close to the inner wall of the noise reduction cavity 400. Therefore, an air flow channel can be formed in the noise reduction cavity 400, and the ventilation effect is better. In the embodiment, the presence of the sound-absorbing material increases the complexity of the sound wave propagation path. When the noise sound wave propagates in the noise reduction cavity 400, not only reflection is formed inside the noise reduction cavity 400, but also part of the sound wave energy is absorbed by the sound-absorbing material. Therefore, the noise discharged from the cavity is smaller.

[0036] In this embodiment, the noise reduction device further comprises a sound absorption panel 500 arranged on the outer wall of the cover plate 200. Therefore, the noise propagating longitudinally inside the cavity 100 to the cover plate 200 first contacts the sound absorption panel 500, part of which is absorbed, thereby directly reducing the noise inside the cavity 100 that is yet to be transmitted. To further improve the sound absorption effect, in this embodiment, the sound absorption material and the sound absorption panel 500 are made of polyester fiber material.

[0037] In addition, the embodiment also discloses a gas water heater comprising the above noise reduction device. The fan of the gas water heater is arranged on the side close to the avoidance opening 410. Therefore, the strong suction force generated by the fan forms a directional airflow barrier, which can directly interfere with and hinder the noise from propagating along the straight path. When the noise sound wave tries to propagate outward from the inside of the cavity 100, the oncoming airflow will form a reverse impact on it, weaken its energy and change its propagation direction.

[0038] Embodiment 2

[0039] The embodiment provides a noise reduction device, which comprises:

[0040] The cavity 100 is provided with an air inlet 120 on the bottom shell 110. Air is introduced into the cavity 100 from the air inlet 120. Noise is formed inside the cavity 100 and propagates outward from the air inlet 120.

[0041] The cover plate 200 is arranged on the side of the air inlet 120 close to the outside of the cavity 100. By arranging the cover plate 200 on the corresponding position on one side of the air inlet 120, the propagation of most of the noise vertically or obliquely passing through the air inlet 120 is effectively blocked. In this embodiment, the cover plate 200 is rectangular.

[0042] The connecting plate 300 is used to fix the cover plate 200 on one side of the air inlet 120, which comprises a support plate 310 arranged between the cover plate 200 and the bottom shell 110, and a fixed plate 320 fixedly connected with the support plate 310 and connected with the bottom shell 110. The connecting plate 300 and the cover plate 200 form a noise reduction cavity 400, which is provided with an avoidance opening 410 arranged between the cover plate 200 and the bottom shell 110. Specifically, in this embodiment, the avoidance opening 410 is arranged on the side of the connecting plate 300 close to the long side of the cover plate 200. The inner wall of the connecting plate 300 in the noise reduction cavity 400 is provided with sound absorption material. In this embodiment, the presence of the sound absorption material increases the complexity of the sound wave propagation path. When the noise sound wave propagates in the noise reduction cavity 400, it will not only form reflection inside the noise reduction cavity 400, but also part of the sound wave energy will be absorbed by the sound absorption material. Therefore, the noise discharged from the cavity is smaller.

[0043] In the embodiment, the cover plate 200 is provided with the sound absorption panel 500 close to the inner side of the noise reduction cavity 400. Therefore, the noise propagating longitudinally to the sound absorption panel 500 will be partially absorbed, and the rest will be reflected to the inner wall of the noise reduction cavity 400 to weaken the noise, so that the noise finally discharged through the escape port 410 is smaller. In order to further improve the sound absorption effect, in the embodiment, the sound absorption material and the sound absorption panel 500 adopt polyester fiber material. In addition, the embodiment also discloses a gas water heater comprising the above noise reduction device.

Claims

1. A noise reduction device, characterized in that, include: A cavity (100) is provided with an air inlet (120) on its bottom shell (110); A cover plate (200) is provided on either side of the air inlet (120); A connecting plate (300) is used to fix the cover plate (200) to one side of the air inlet (120) and form a noise reduction cavity (400) with the cover plate (200); The noise reduction cavity (400) is provided with a clearance opening (410), which is located between the cover plate (200) and the bottom shell (110).

2. The noise reduction device according to claim 1, characterized in that, The noise reduction device also includes a sound-absorbing panel (500) disposed on the side of the cover plate (200) near the inside of the cavity (100).

3. The noise reduction device according to claim 1, characterized in that, The clearance opening (410) is located on the long side of the connecting plate (300) near the cover plate (200).

4. The noise reduction device according to claim 1, characterized in that, The connecting plate (300) includes a support plate (310) disposed between the cover plate (200) and the bottom shell (110).

5. A noise reduction device according to claim 4, characterized in that, The connecting plate (300) further includes a fixing plate (320) for connecting with the bottom shell (110), and the fixing plate (320) is fixedly connected to the support plate (310).

6. The noise reduction device according to claim 1, characterized in that, The cover plate (200) is disposed inside the cavity (100); the noise reduction cavity (400) is provided with sound-absorbing material.

7. The noise reduction device according to claim 1, characterized in that, The cover plate (200) is disposed outside the cavity (100); the inner wall of the connecting plate (300) is provided with sound-absorbing material.

8. A noise reduction device according to claim 6 or 7, characterized in that, The sound-absorbing material is polyester fiber.

9. A gas water heater, characterized in that, Includes the noise reduction device according to any one of claims 1 to 8.

10. A gas water heater according to claim 9, characterized in that, The fan of the gas water heater is located on the side near the avoidance opening (410).

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