CN207349177U - Can noise reduction chassis - Google Patents

Abstract

This application discloses the embodiment of the present application provide one kind can noise reduction chassis, an embodiment of the cabinet includes：Casing, for housing wind turbine；Casing is equipped with air inlet and air outlet, for when in casing house fan operation when, make air from air inlet enter cabinet and from air outlet flow out；It is close to internal side of shell wall and is equipped with acoustic material, for separates the noise that can be spread out of during fan operation by chassis sidewall；Sound-absorbing material is equipped with air inlet one end and air outlet in the casing, for absorbing the noise that can be spread out of during fan operation by air inlet one end or air outlet.The embodiment is so as to effectively reducing the noise produced during fan operation.

Description

Noise reduction chassis

technical field

This application relates to the technical field of fan application, in particular to a noise-reducing chassis.

Background technique

The fan is a machine that relies on the input mechanical energy to increase the gas pressure and discharge the gas. Commonly referred to as fans, for example, may include ventilators, blowers, wind generators and the like. Fans can be widely used in the following fields: ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and drafting of boilers and industrial furnaces; air conditioning equipment and household appliances Cooling and ventilation in the center; drying and selection of grain, wind tunnel wind source and inflation and propulsion of hovercraft, etc.

Because the fan exhausts gas through mechanical energy, it will generate noise due to vibration during operation. In some cases, such as when fans are used in household air-conditioning equipment, excessive noise will inevitably affect the normal life of users. Therefore, it is necessary to reduce the noise of the fan by improving the chassis for accommodating the fan.

Utility model content

The purpose of this application is to propose an improved noise reduction cabinet to solve the technical problems mentioned in the background technology section above.

An embodiment of the present application provides a noise-reducing chassis, which includes: a casing for accommodating a fan; an air inlet and an air outlet are provided on the casing for Air enters the case from the air inlet and flows out from the air outlet; sound-insulating material is provided close to the inner wall of the case to block the noise that can be transmitted through the side wall of the case during the operation of the fan; the end of the case near the air inlet There are sound-absorbing materials at the air inlet and the air outlet, which are used to absorb the noise that can be transmitted through the air inlet or the air outlet during the operation of the fan.

In some embodiments, the sound-absorbing material provided at the air outlet is provided with at least one hole, so as to ensure that the gas flows out of the air outlet smoothly when the fan is running.

In some embodiments, the sound-absorbing material provided at one end of the air inlet is also wrapped with a protective material.

In some embodiments, the protective material includes aluminum foil.

In some embodiments, the sound insulation material includes sound insulation felt, and is attached to the inner wall of the cabinet.

In some embodiments, the sound absorbing material includes melamine foam.

In some embodiments, the thickness of the melamine foam is 20 centimeters.

The noise-reducing chassis provided by this application is provided with sound-insulating materials on the inner wall of the case, and sound-absorbing materials are respectively arranged at the air inlet and the air outlet. Since the noise that can be transmitted through the side wall of the case during the operation of the fan can be cut off, And absorb the noise that can be transmitted through the air inlet or the air outlet during the operation of the fan, so that the noise generated during the operation of the fan can be effectively reduced.

Description of drawings

Other characteristics, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

Figure 1a and Figure 1b are structural schematic diagrams of an embodiment of a noise reduction cabinet according to the present application;

Fig. 2 is a schematic diagram of holes provided on the sound-absorbing material at the air outlet according to an embodiment of the noise reduction chassis of the present application;

Fig. 3 is a schematic diagram of an embodiment of a noise reduction cabinet applied to a fresh air system according to the present application.

Detailed ways

The application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain related inventions, rather than to limit the invention. It should also be noted that, for the convenience of description, only the parts related to the related invention are shown in the drawings.

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

Figures 1a and 1b illustrate a noise attenuable enclosure 100 according to one embodiment of the present application.

As shown in FIG. 1 a , viewed from the outside, the chassis 100 may include a casing 101 , an air inlet 103 and an air outlet 104 . Wherein: the casing 101 can be used to accommodate the fan 102; the casing 101 is provided with an air inlet 103 and an air outlet 104, so that air enters the casing 101 from the air inlet 103 and flows out from the air outlet 104 during the operation of the fan 102. The air inlet 103 and the air outlet 104 can be arranged at both ends of the casing 101, and can also be arranged on the same side of the casing 101. According to the actual situation, the setting of the fan 102 and the air passage are different. For the specific setting method, please refer to the prior art, because It is not the invention point of this application, and will not be repeated here. In this embodiment, the air outlet 104 can be arranged at both ends of the casing 101 , and the air inlet 103 is arranged on the side wall of the casing near the end opposite to the air outlet 104 . It should be noted that the air outlet 104 may be one opening, or a combination of multiple openings. The openings here can be of various shapes. For example, the air outlet 104 may include two rows of round holes.

Please refer to FIG. 1b. In order to illustrate the noise reduction structure of this embodiment more clearly, FIG. 1b shows a longitudinal section of the chassis 100 in FIG. 1a. As shown in FIG. 1 b , in the case 100 , a sound-insulating material 105 is provided close to the inner side wall of the case 101 for isolating the noise that can be transmitted through the side wall of the case 101 during the operation of the fan 102 . A sound-absorbing material 106 is provided in the casing 101 near the air inlet 103 and the air outlet 104 to absorb the noise that can be transmitted through the air inlet 103 or the air outlet 104 during the operation of the fan 102 . It can be understood that the air inlet 103 and the air outlet 104 are in communication with the air, and the noise cannot be isolated by the sound-insulating material, so the sound-absorbing material 106 is provided. In some implementations, the sound-absorbing material 106 can be provided at the air inlet 103 and the air outlet 104 by filling. In this case, the sound absorbing material 106 may or may not have a fixed shape.

In practice, the soundproofing material can be any material that can be used to block noise. Examples include but are not limited to: solid bricks, reinforced concrete walls, wood boards, gypsum boards, iron boards, sound insulation felts, fiberboards, etc. In an optional implementation of this embodiment, the sound-insulating material 105 can be a sound-insulating felt made of rubber, polymer materials, etc. The inner wall cuts off the noise inside the casing 101 .

Sound-absorbing materials are mostly loose and porous materials, such as slag wool, blankets, etc. The sound-absorbing mechanism is that sound waves penetrate into the pores of the material, and the pores are mostly open holes that communicate with each other inside. After superposition, the sound will become smaller. In this embodiment, the sound-absorbing material 106 may include, but is not limited to, melamine foam, polyester fiber sound-absorbing cotton, and the like. Those skilled in the art can select sound-absorbing materials according to actual conditions. For example, assuming that 20CM thick melamine foam can reduce the wind noise of the air outlet by about 6 decibels, and the use of 20CM thick polyester fiber sound-absorbing cotton can reduce the noise of the air outlet by about 5 decibels. For fan noise reduction, melamine foam with better effect can be used.

In some optional implementations of this embodiment, as shown in FIG. 2 , the sound-absorbing material 106 provided at the air outlet 104 may be provided with at least one hole 1061 to ensure that the gas flows out of the air outlet 104 smoothly when the fan 102 is running. Wherein, the shape and size of the hole 1061 may or may not be consistent with the shape and size of the air outlet 104 , which is not limited in this application.

In some optional implementations of this embodiment, the sound-absorbing material 1031 provided at one end of the air inlet 103 may also be wrapped with a protective material to prevent dust in the air from clogging the pores of the sound-absorbing material when the fan works for a long time. Here, the protective material can be made of a thinner material, so that noise and air can easily penetrate. Alternatively, the protective material may be a foil, ie an extremely thin metal sheet, such as aluminum foil, with a maximum thickness of 0.2 mm.

Those skilled in the art can understand that, taking the sound-absorbing material as an example, within a certain thickness range, the noise decreases as the thickness of the top sound-absorbing material increases, but when the thickness of the sound-absorbing material reaches a maximum value, the noise basically does not change . Therefore, we can determine the thickness and height of the sound-insulating material, obtain the maximum value through experiments, and determine it as the thickness of the sound-absorbing material to be set. When this maximum value is found, it can be considered that the shortest board for noise reduction is no longer the air outlet, and then try to increase the height or thickness of the sound insulation material to see if it can effectively reduce the noise. If it is effective, it means that the shortest board at this time has already found it. For the shortest board, find the maximum value of the height or thickness of the sound-insulating material that can effectively reduce noise according to the same method as the sound-absorbing material, and determine it as the thickness of the sound-absorbing material to be set.

Therefore, in some optional implementations of this embodiment, the thickness of the sound-absorbing material 106 at the air outlet, the thickness of the sound-absorbing material 106 at the air inlet, the height of the sound-insulating material 105 on the inner wall of the cabinet, and the thickness of the sound-insulating material 105 are respectively It can be determined by the following method: select the parameter to be determined, wherein the parameter to be determined is any one of the thickness of the sound-absorbing material, the height of the sound-insulating material on the inner wall of the casing, and the thickness of the sound-insulating material; other parameters are limited to fixed values, according to The preset rule changes the value of the parameter to be determined; detects the noise reduction at the corresponding position when the value of the parameter to be determined changes; and determines the parameter to be determined according to the value of the previous parameter to be determined in response to the noise reduction being less than a preset threshold.

For example, select the thickness of the sound-absorbing material 106 at the air outlet as a parameter to be determined, keep the thickness of the sound-absorbing material 106 at the air inlet, the height of the sound-absorbing material 105 on the inner wall of the casing, and the thickness of the sound-insulating material 105 as fixed values, according to preset rules (For example, increase by 1 centimeter), change the thickness value of the sound-absorbing material 106 at the air outlet, and detect the noise reduction at the air outlet 104 when the thickness value of the sound-absorbing material 106 at the air outlet changes (for example, the decibel number that is reduced compared to the previous time); Response When the noise reduction is less than a preset threshold (eg, 1 decibel), the thickness of the sound-absorbing material 106 at the air outlet is determined according to the thickness of the sound-absorbing material 106 at the previous air outlet. For example, the previous thickness value of 20 cm of the sound-absorbing material 106 at the air outlet is determined as the thickness of the sound-absorbing material 106 at the air outlet. Optionally, the value of individual parameters among the above parameters (such as the thickness of the sound-absorbing material at the air inlet) may be 0, which is not limited in this application.

See Figure 3. FIG. 3 shows a schematic diagram of an embodiment of a device for reducing noise of a fan according to an embodiment of the present application applied to a fresh air system 300 . In the fresh air system 300 , in the casing 301 for accommodating the fan 302 , sound-absorbing materials 306 are provided at the air outlet 304 and on the side close to the air inlet 303 . On both sides of the fan 302, a first filter element 308 is provided, and a second filter element 307 is provided near the air outlet 304. In order to reduce the noise generated when the air passes through the first filter element 308 and the second filter element 307, the inner wall of the casing 301 The sound insulation material 305 must ensure that it can surround the first filter element 308 and the second filter element 307 . Optionally, the sound-insulating material 305 and the sound-absorbing material 306 are respectively connected at an end close to the air inlet and a section of the air outlet.

The above description is only a preferred embodiment of the present application and an illustration of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to the technical solution formed by the specific combination of the above-mentioned technical features, and should also cover the technical solutions formed by the above-mentioned technical features or without departing from the above-mentioned inventive concept. Other technical solutions formed by any combination of equivalent features. For example, a technical solution formed by replacing the above-mentioned features with technical features with similar functions disclosed in (but not limited to) this application.

Claims (7)

1. A noise reduction cabinet, characterized in that the cabinet comprises: The casing is used to accommodate the fan; The casing is provided with an air inlet and an air outlet, which are used to allow air to enter the chassis from the air inlet and flow out from the air outlet when the fan installed in the casing is running; A sound-insulating material is provided close to the inner wall of the casing, which is used to isolate the noise that can be transmitted through the side wall of the casing during the operation of the fan; Sound-absorbing materials are provided in the casing near the air inlet and the air outlet to absorb the noise that can be transmitted through the air inlet or the air outlet during the operation of the fan. 2. The chassis according to claim 1, characterized in that: The sound-absorbing material provided at the air outlet is provided with at least one hole to ensure that the gas flows out of the air outlet smoothly when the fan is running. 3. The chassis according to claim 1 or 2, characterized in that: The sound-absorbing material provided at one end of the air inlet is also wrapped with a protective material. 4. The chassis according to claim 3, characterized in that: The protective material includes aluminum foil. 5 . The case according to claim 1 , wherein the sound-insulating material comprises sound-insulating felt, and is attached to the inner wall of the case. 6 . 6. The cabinet of claim 1, wherein the sound absorbing material comprises melamine foam. 7. The cabinet according to claim 6, wherein the thickness of the melamine foam is 20 cm.