CN209512283U - Noise reduction structure of gas water heater - Google Patents

Abstract

The utility model discloses a noise reduction structure of a gas water heater, comprising a shell and a heat exchanger, wherein the heat exchanger is arranged inside the shell, a noise reduction device is arranged between the shell and the heat exchanger, the noise reduction device comprises at least one noise reduction layer, each noise reduction layer comprises a metal plate and a flexible material, a plurality of through holes are opened on the metal plate, the flexible material is arranged on the surface of the metal plate facing away from the heat exchanger and the flexible material covers the through holes, and the noise reduction and silencing effects are good.

Description

Noise reduction structure for a gas water heater

technical field

The utility model relates to the technical field of gas water heaters, in particular to a noise reduction structure of a gas water heater.

Background technique

With the improvement of people's living standards, the use of gas water heaters has become popular, but the noise problem of gas water heaters during operation is also troublesome. It is understood that the national standard requires that the noise of gas water heaters be no more than 65 decibels when they are burning, while the noise emitted by ordinary gas water heaters when they are running is generally above 55 decibels. If the noise level is too high, it will affect people's hearing. According to medical experiment data, the noise value of more than 50 decibels is equivalent to talking loudly, which affects normal life; 60-70 decibels is equivalent to standing on the continuous flow of the road, which will make people upset and distracted; more than 90 decibels It is equivalent to being in a noisy bar, and living in such a noisy environment for a long time will seriously affect hearing and lead to other diseases such as cardiovascular diseases. Therefore noise becomes the technical problem to be solved urgently that existing gas water heater exists.

In addition, with the improvement of people's quality of life requirements, users pay more and more attention to the noise parameters of electrical appliances when purchasing gas water heaters. It can be said that the quality of noise performance is a key factor for product competitiveness.

Utility model content

The utility model aims to solve one of the existing problems in the related art at least to a certain extent. Therefore, the utility model proposes a noise reduction structure for a gas water heater, which has good noise reduction and noise reduction effects.

The above-mentioned purpose is achieved through the following technical solutions:

A noise reduction structure for a gas water heater, comprising a casing and a heat exchanger, the heat exchanger is arranged inside the casing, a noise reduction device is arranged between the casing and the heat exchanger, and the noise reduction The device includes at least one layer of noise reduction layer, each layer of the noise reduction layer includes a metal plate and a flexible material, a number of through holes are opened on the metal plate, and the flexible material is arranged on the metal plate facing away from the on the surface of the heat exchanger and the flexible material covers the through holes.

In some embodiments, the housing includes a front panel and a surrounding panel assembled together, and the noise reduction device is disposed on an inner surface of the front panel.

In some embodiments, the diameter of the through hole is 1 mm to 20 mm, and the thickness of the flexible material is 1 μm to 200 μm.

In some embodiments, the noise reduction layer includes multiple layers, and the apertures of the through holes in each layer gradually decrease along the direction from approaching the heat exchanger to away from the heat exchanger.

In some embodiments, the thickness of each layer of the flexible material decreases gradually from approaching the heat exchanger to away from the heat exchanger.

In some embodiments, the noise reduction layer includes three layers, specifically along the direction from close to the heat exchanger to away from the heat exchanger: an inner noise reduction layer, a middle noise reduction layer and an outer noise reduction layer, wherein the The inner noise reduction layer includes an inner metal plate and a flexible material, the middle noise reduction layer includes a middle metal plate and a flexible material, and the outer noise reduction layer includes an outer metal plate and a flexible material.

In some embodiments, the diameter of the through hole of the inner metal plate is 12 mm to 20 mm, and the thickness of the flexible material disposed on the surface of the inner metal plate is 100 μm to 200 μm;

The diameter of the through hole of the middle metal plate is 5 mm to 12 mm, and the thickness of the flexible material arranged on the surface of the middle metal plate is 20 μm to 100 μm;

The diameter of the through hole of the outer metal plate is 1 mm to 5 mm, and the thickness of the flexible material disposed on the surface of the outer metal plate is 2 μm to 20 μm.

In some embodiments, the flexible material is flame-retardant film, flame-resistant paper or artificial leather; the flexible material and the metal plate are bonded together by glue.

In some embodiments, the cross-section of the metal plate is arc-shaped, and is formed by being concave from a side facing the heat exchanger to a side facing away from the heat exchanger.

In some embodiments, the width of each layer of the metal plate gradually increases along the direction from approaching the heat exchanger to away from the heat exchanger.

In some embodiments, there is prestress between the metal plate and the flexible material, and the prestress range is 100-1000 Pa.

Compared with the prior art, the utility model has at least the following effects:

1. The noise reduction structure of the gas water heater of the present utility model can significantly reduce the noise generated during the operation of the gas water heater through the additional noise reduction device, improve user experience, and enhance product competitiveness.

Other beneficial results of the utility model will be described in the specific implementation manner with reference to the accompanying drawings.

Description of drawings

Fig. 1 is the structural representation of gas water heater in the utility model embodiment;

Fig. 2 is a three-dimensional schematic diagram of a noise reduction device in an embodiment of the present invention;

Fig. 3 is an exploded schematic view of the noise reduction device in the embodiment of the present invention;

Fig. 4 is a top view of the noise reduction device in the embodiment of the utility model.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.

Embodiment 1: As shown in Figure 1, Figure 2, Figure 3 and Figure 4, this embodiment provides a noise reduction structure for a gas water heater, including a shell 3 and a heat exchanger 4, and the heat exchanger 4 is arranged on the shell 3 Inside, a noise reduction device 1 is provided between the shell 3 and the heat exchanger 4, and the noise reduction device 1 includes at least one layer of metal plate. The direction of the fan system 4 is specifically: the inner noise reduction layer, the middle noise reduction layer and the outer noise reduction layer, wherein the inner noise reduction layer includes the inner metal plate 101 and the flexible material 2, and the middle noise reduction layer includes the middle metal plate 102 and the flexible material 2, the outer noise reduction layer includes the outer metal plate 103 and the flexible material 2, the inner metal plate 101, the middle metal plate 102 and the outer metal plate 103 are respectively provided with a number of through holes 100, the through holes 100 are evenly arranged, the flexible material 2 is arranged on the surface of the metal plate facing away from the heat exchanger 4 and the flexible material 2 covers the through hole 100, the inner and outer directions referred to in this embodiment can be referred to in Figure 2 or the arrow in Figure 4 direction shown.

The noise reduction structure of the gas water heater in this embodiment absorbs or eliminates the noise generated by the heat exchanger 4 or other components inside the gas water heater through the additional noise reduction device 1, thereby significantly reducing the noise generated when the gas water heater is in operation. The purpose of noise is to improve user experience and enhance product competitiveness.

Specifically, each through hole 100 of the inner metal plate 101, the middle metal plate 102 and the outer metal plate 103 and its corresponding cavity air layer form a row of cavity resonators, when the frequency of the incident sound wave and the system When the natural frequency is the same, the air in the cavity will vibrate violently due to resonance and cause friction to lose sound energy.

In addition, the sound absorption mechanism of the ultra-thin flexible material is mainly the internal damping loss when the flexible material 2 vibrates as a whole, so it can be approximated as a simple mass-spring system. The sound absorption coefficient is very low at high frequencies, the resonance frequency is usually between 200 and 2000Hz, and the maximum sound absorption coefficient is 0.3 to 0.4. As a result, the noise reduction device of this embodiment has both the sound absorption properties of the metal plate and the resonant sound absorption properties of the flexible material 2, and the noise reduction and noise reduction effects are ideal.

In this embodiment, the casing 3 includes a front panel 301 and a surrounding panel 302 assembled together, wherein the surrounding panel 302 includes a back panel and side panels arranged on both sides of the back panel, and the front panel 301 is connected to the front ends of the side panels on both sides Between, the noise reduction device 1 is arranged on the inner surface of the front panel 301, the inner surface of the front panel 301 specifically refers to the surface facing the side of the heat exchanger 4, so that the noise reduction device 1 can effectively absorb the Noise generated by the device 4 or other components and propagated toward the user.

Preferably, the diameter of the through hole 100 is 1 mm to 20 mm, and the thickness of the flexible material 2 is 1 μm-200 μm. This combination can minimize or absorb the noise generated when the gas water heater is working, and improve user experience.

In particular, the noise reduction layer includes multiple layers, and the apertures of the through holes 100 in each layer gradually decrease along the direction from approaching the heat exchanger 4 to away from the heat exchanger 4. In this embodiment, the inner metal plate 101 is larger than the middle metal plate 102. , the middle metal plate 102 is closer to the heat exchanger 4 than the outer metal plate 103, and the aperture of the through hole 100 of the inner metal plate 101 is larger than the aperture of the through hole 100 of the middle metal plate 102, and the through hole of the middle metal plate 102 The aperture ratio of the hole 100 is larger than that of the through hole 100 of the outer metal plate 103 .

In addition, the thickness of each layer of flexible material 2 decreases gradually along the direction from approaching heat exchanger 4 to away from heat exchanger 4. The thickness of the flexible material 2 is large, and the thickness of the flexible material 2 on the surface of the middle metal plate 102 is greater than the thickness of the flexible material 2 on the surface of the outer metal plate 103 . Through this design, it can absorb low, medium and high frequency noise, and the specific size parameters can be implemented according to different gas water heaters. The purpose of absorbing noise in the full frequency band is achieved by setting the apertures of different through holes 100 and the thickness of the flexible material 2 to match, absorbing and reducing noise as much as possible, and improving user experience.

Specifically, the diameter of the through hole 100 of the inner metal plate 101 is 12 mm to 20 mm, and the thickness of the flexible material 2 disposed on the surface of the inner metal plate 101 is 100 μm to 200 μm;

The diameter of the through hole 100 of the middle metal plate 102 is 5 mm to 12 mm, and the thickness of the flexible material 2 arranged on the surface of the middle metal plate 102 is 20 μm to 100 μm;

The diameter of the through hole 100 of the outer metal plate 103 is 1 mm to 5 mm, and the thickness of the flexible material 2 disposed on the surface of the outer metal plate 103 is 2 μm to 20 μm. According to the test, the sound absorption and noise reduction effect of this design noise reduction device is the most ideal. It can absorb low, medium and high frequency noise, effectively improve the user experience, and avoid the discomfort caused by noise to the user.

In this embodiment, the flexible material 2 is a flame-retardant film, flame-resistant paper or artificial leather, which has good noise reduction and noise reduction effects. Of course, the flexible material 2 can be made of other flexible materials, as long as the design purpose of this embodiment can be achieved.

Preferably, the flexible material 2 and the metal plate are bonded together by glue, and its structure is simple, which facilitates the installation and fixing of the flexible material 2, and the installed flexible material 2 is relatively stable, and is not easy to shift or fall off . When adhering the flexible material 2, it is necessary to ensure a certain prestress, so that there is prestress between the metal plate and the flexible material 2, and the prestress range is 100-1000 Pa, so as to achieve a better noise reduction effect. In this embodiment, glue with flame retardant properties is used.

In particular, the cross-section of the metal plate is arc-shaped, and is formed by being recessed from the side facing the heat exchanger 4 to the side facing away from the heat exchanger 4, thereby expanding the noise-absorbing range of the noise reduction device and avoiding noise at the sound source. The noise avoids the noise reduction device and spreads outward, thereby effectively improving the sound absorption and noise reduction effects of the noise reduction device.

In this embodiment, the width of each metal plate increases gradually along the direction from approaching the heat exchanger 4 to away from the heat exchanger 4. Specifically, in this embodiment, referring to FIG. 4, the width of the middle metal plate 102 is wider than the inner metal plate The width of 101 is large, the width of the outer metal plate 103 is larger than the width of the middle metal plate 102, and the inner metal plate 101 is roughly accommodated in the arc formed by the depression of the middle metal plate 102, and the middle metal plate 102 is roughly accommodated The outer metal plate 103 is recessed inside the arc formed, so as to improve the sound absorption and noise reduction effect of the noise reduction device, enhance the user experience, and improve the market competitiveness of the product.

What have been described above are only some embodiments of the present utility model. For those skilled in the art, without departing from the inventive concept of the present utility model, some modifications and improvements can be made, and these all belong to the protection scope of the present utility model.

Claims (11)

1. a kind of denoising structure of gas heater, including shell (3) and heat exchanger (4), the heat exchanger (4) are set to Inside the shell (3), which is characterized in that be provided with denoising device between the shell (3) and the heat exchanger (4) (1), the denoising device (1) includes at least one layer of noise reduction layer, and each layer noise reduction layer includes metal plate and flexible material (2), it is offered on the metal plate several through-holes (100), flexible material (2) setting is in the metal plate backwards to described On the surface of heat exchanger (4) and the flexible material (2) covers the through-hole (100).

2. a kind of denoising structure of gas heater according to claim 1, which is characterized in that the shell (3) includes The front panel (301) and coaming plate (302) fitted together, the denoising device (1) are set to the inside of the front panel (301) On surface.

3. a kind of denoising structure of gas heater according to claim 1, which is characterized in that the through-hole (100) Pore size be 1mm to 20mm, the flexible material (2) with a thickness of 1 μm -200 μm.

4. a kind of denoising structure of gas heater according to claim 1, which is characterized in that the noise reduction layer includes more The aperture of layer, each layer through-hole (100) is gradually decreased along close to heat exchanger (4) to the direction far from heat exchanger (4).

5. a kind of denoising structure of gas heater according to claim 4, which is characterized in that each layer flexible material (2) thickness is gradually decreased along close to heat exchanger (4) to the direction far from heat exchanger (4).

6. a kind of denoising structure of gas heater according to any one of claims 1 to 5, which is characterized in that the noise reduction Layer includes three layers, along close to heat exchanger (4) to the direction far from heat exchanger (4) specifically: internal layer noise reduction layer, middle layer noise reduction Layer and outer layer noise reduction layer, wherein the internal layer noise reduction layer includes inner layer metal plate (101) and flexible material (2), the middle layer drop Layer of making an uproar includes middle layer metal plate (102) and flexible material (2), and the outer layer noise reduction layer includes outer metal plates (103) and flexibility Material (2).

7. a kind of denoising structure of gas heater according to claim 6, which is characterized in that the inner layer metal plate (101) aperture of through-hole (100) is 12mm to 20mm, the flexible material being set on the inner layer metal plate (101) surface (2) with a thickness of 100 μm to 200 μm；

The aperture of the through-hole (100) of the middle layer metal plate (102) is 5mm to 12mm, is set to the middle layer metal plate (102) Flexible material (2) on surface with a thickness of 20 μm to 100 μm；

The aperture of the through-hole (100) of the outer metal plates (103) is 1mm to 5mm, is set to the outer metal plates (103) Flexible material (2) on surface with a thickness of 2 μm to 20 μm.

8. a kind of denoising structure of gas heater according to any one of claims 1 to 5, which is characterized in that the flexibility Material (2) is fire-retardant film, fire retardant papers or artificial leather；

It between the flexible material (2) and the metal plate is bonded together by glue.

9. a kind of denoising structure of gas heater according to any one of claims 1 to 5, which is characterized in that the metal The cross section of plate is arc-shaped, from being recessed towards the heat exchanger (4) side toward backwards to the heat exchanger (4) side.

10. a kind of denoising structure of gas heater according to claim 9, which is characterized in that each layer metal plate Width gradually increased along close to heat exchanger (4) to far from the direction of heat exchanger (4).

11. a kind of denoising structure of gas heater according to any one of claims 1 to 5, which is characterized in that the metal There is prestressing force, prestressing force range is 100-1000pa between plate and the flexible material (2).