CN218065222U - A low frequency noise reduction device for fresh air system - Google Patents

Abstract

The utility model relates to the technical field of the fresh air system, in particular to a low-frequency noise reduction device for the fresh air system, which includes a shell, and a shock-absorbing pad is fixedly connected to the inner side of the shell. The utility model has the advantages that seven sound-insulating cavities are formed between the outer shell and the inner shell through the arrangement of the first sound-insulating frame, the second sound-insulating frame and the third sound-insulating frame. As we all know, the more layers, the better the sound insulation and noise reduction. The better the effect, and the first sound insulation frame, the second sound insulation frame and the third sound insulation frame are set around the center of the inner shell, and are set on all four sides, it can fully reduce the noise of the fan and reduce the transmission effect of low frequency noise The baffle plate is arranged obliquely, and each upper and lower two described baffle plates form a group, when the low-frequency noise is transmitted to the inside of the first sound insulation frame, the second sound insulation frame and the inside of the third sound insulation frame, it can be on the inside of the baffle plate Reflect and attenuate, thereby further reducing low-frequency noise and further protecting users.

Description

A low frequency noise reduction device for fresh air system

technical field

The utility model relates to the technical field of fresh air systems, in particular to a low-frequency noise reduction device for fresh air systems.

Background technique

The fresh air system is an independent air treatment system composed of an air supply system and an exhaust system. It is divided into two types: ducted fresh air system and ductless fresh air system. The ducted fresh air system is composed of fresh air fans and pipe fittings. The outdoor air is purified by the fresh air fans and introduced into the room, and the indoor air is discharged through the pipes. The ductless fresh air system is composed of fresh air fans. Relatively speaking, the ducted fresh air system is more suitable for industrial or large-area office areas due to the large amount of engineering, while the ductless fresh air system is more suitable for home use because of its easy installation. In 1935, after many attempts, he invented and manufactured the world's first heat exchange equipment that can filter air pollution, also known as the fresh air system. The fresh air fan of the fresh air system often produces low-frequency noise, which causes great harm to the human body. All noise is harmful to the human body. Long-wave noise, that is, low-frequency noise, has a much stronger direct impact on physiology than short-wave noise, and long-wave noise will have a long-term impact on human health and produce sequelae. However, the harm caused by this long-wave noise has not been paid enough attention by people. Therefore, a device for reducing the low-frequency noise of the fresh air system is needed.

Utility model content

The purpose of the utility model is to overcome the shortcomings of the prior art and provide a low-frequency noise reduction device for fresh air systems.

The purpose of this utility model is achieved through the following technical solutions: a low-frequency noise reduction device for fresh air systems, including a shell, the inner side of the shell is fixedly connected with a shock absorber, and the other side of the shock absorber is fixedly connected with a a mounting part, the bottom of the mounting part is fixedly connected with an inner shell through a shock-absorbing pad;

The inner side of the mounting part is fixedly connected with a first sound insulation frame, the inner side of the first sound insulation frame is fixedly connected with a fixing column, the inner side of the first sound insulation frame is fixedly connected with a second sound insulation frame through a fixing column, and the first sound insulation frame is fixedly connected with a second sound insulation frame through a fixing column. The inner side of the second sound insulation frame is fixedly connected with the third sound insulation frame through the fixing column;

Baffles are fixedly connected to the inside of the first sound insulation frame, the inside and outside of the second sound insulation frame, and the inside and outside of the third sound insulation frame.

Optionally, the shock absorbing pad is made of rubber, and the vertical section of the mounting part is in a "U" shape.

Optionally, the mounting part is made of aluminum alloy, and the inner shell is welded to the outside of the fan of the fresh air system.

Optionally, the first sound insulation frame is specifically made of foamed fiber aluminum, and the length and height of the first sound insulation frame are greater than the length and height of the second sound insulation frame.

Optionally, the second sound insulation frame is completely located inside the first sound insulation frame, and the length and height of the second sound insulation frame are greater than the length and height of the third sound insulation frame.

Optionally, a total of seven sound insulation cavities are formed between the outer shell and the inner shell through the arrangement of the first sound insulation frame, the second sound insulation frame and the third sound insulation frame. As we all know, the more layers, the better the sound insulation and noise reduction effect. The better, and the first sound insulation frame, the second sound insulation frame and the third sound insulation frame are arranged around the center of the inner shell, and are arranged on all four sides, so as to fully reduce the noise of the fan and reduce the transmission effect of low-frequency noise.

Optionally, the baffles are arranged obliquely, and each upper and lower two baffles form a group. When the low-frequency noise is transmitted to the first sound insulation frame, the inner side of the second sound insulation frame and the inner side of the third sound insulation frame, it can It is reflected and attenuated on the inner side of the baffle, thereby further reducing low-frequency noise and further protecting users.

The utility model has the following advantages:

1. The low-frequency noise reduction device for the fresh air system, this device is the shell installed outside the fan of the fresh air system, and uses the shock absorbing pad and the mounting structure to reduce the vibration transmitted by the fan of the fresh air system and reduce the noise. Produced, further, the first sound insulation frame is fixedly connected to the inner side of the mounting piece, the inner side of the first sound insulation frame is fixedly connected to a fixing column, the inner side of the first sound insulation frame is fixedly connected to a second sound insulation frame through the fixing column, and the second sound insulation frame The inner side of the frame is fixedly connected with the third sound insulation frame through the fixing column. Seven sound insulation cavities are formed between the outer shell and the inner shell through the setting of the first sound insulation frame, the second sound insulation frame and the third sound insulation frame. As we all know, the layer The more the number, the better the effect of sound insulation and noise reduction, and the first sound insulation frame, the second sound insulation frame and the third sound insulation frame are arranged around the center of the inner shell, and are set on all four sides, which can comprehensively reduce the noise of the fan , to reduce the transfer effect of low frequency noise.

2. For the low-frequency noise reduction device for the fresh air system, baffles are fixedly connected to the inside of the first sound insulation frame, the inside and outside of the second sound insulation frame, and the inside and outside of the third sound insulation frame. The upper and lower baffles form a group, and when the low-frequency noise is transmitted to the inside of the first sound insulation frame, the second sound insulation frame and the inside of the third sound insulation frame, it can be reflected and attenuated on the inside of the baffle, thereby further improving the Low-frequency noise is used for noise reduction, which further protects users.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural representation of the utility model front view;

Fig. 3 is a schematic diagram of an enlarged structure at A in Fig. 2 of the present utility model.

In the figure: 1-outer shell, 2-shock absorbing pad, 3-installation piece, 4-inner shell, 5-first sound insulation frame, 6-fixing column, 7-second sound insulation frame, 8-third sound insulation frame, 9 - bezel.

detailed description

The utility model will be further described below in conjunction with the accompanying drawings, but the protection scope of the utility model is not limited to the following description.

As shown in Figure 1-3, a low-frequency noise reduction device for fresh air systems, which includes a housing 1, the inner side of the housing 1 is fixedly connected with a shock absorber 2, and the other side of the shock absorber 2 is fixedly connected with a mounting part 3 , the bottom of the mounting part 3 is fixedly connected with the inner shell 4 through the shock pad 2;

The inner side of the mounting part 3 is fixedly connected with a first soundproof frame 5, and the inner side of the first soundproof frame 5 is fixedly connected with a fixed column 6, and the inner side of the first soundproof frame 5 is fixedly connected with a second soundproof frame 7 through the fixed column 6, and the second The inner side of the soundproof frame 7 is fixedly connected with the third soundproof frame 8 through the fixed column 6;

Baffles 9 are fixedly connected to the inside of the first sound insulation frame 5 , the inside and outside of the second sound insulation frame 7 , and the inside and outside of the third sound insulation frame 8 .

As a preferred technical solution of the utility model: the shock absorbing pad 2 is made of rubber material, the vertical section shape of the mounting part 3 is "U" shape, the mounting part 3 is made of aluminum alloy, and the inner shell 4 is welded on the outside of the fresh air system fan , the first sound insulation frame 5 is specifically made of foamed fiber aluminum, the length and height of the first sound insulation frame 5 are greater than the length and height of the second sound insulation frame 7, and the second sound insulation frame 7 is completely located inside the first sound insulation frame 5, The length and the height of the second soundproof frame 7 are greater than the length and height of the third soundproof frame 8, and the arrangement of the first soundproof frame 5, the second soundproof frame 7 and the third soundproof frame 8 between the outer shell 1 and the inner shell 4 Seven sound insulation cavities are formed. As we all know, the more layers, the better the sound insulation and noise reduction effect, and the first sound insulation frame 5, the second sound insulation frame 7 and the third sound insulation frame 8 are arranged around the center of the inner shell 4, And all four sides are equipped with it, which can comprehensively reduce the noise of the fan and reduce the transmission effect of low-frequency noise;

The baffles 9 are arranged obliquely, and each upper and lower two baffles 9 form a group. When the low-frequency noise is transmitted to the inner side of the first soundproof frame 5, the second soundproof frame 7 and the inner side of the third soundproof frame 8, the baffle plate can The inner side of 9 is reflected and attenuated, thereby further reducing low-frequency noise and further protecting users.

The working process of the present utility model is as follows:

S1, the device is the shell installed outside the fan of the fresh air system;

S2, the structure of the shock absorbing pad 2 and the mounting part 3 reduces the vibration transmitted by the fan of the fresh air system and reduces the generation of noise;

S3, between the outer shell 1 and the inner shell 4, a total of seven sound-insulating cavities are formed by setting the first sound-insulating frame 5, the second sound-insulating frame 7 and the third sound-insulating frame 8 to further attenuate low-frequency noise;

S4. The inner side of the first soundproof frame 5, the inner side and the outer side of the second soundproof frame 7, and the inner side and the outer side of the third soundproof frame 8 are all fixedly connected with baffles 9, and the baffles 9 are arranged obliquely, and each upper and lower two described The baffles 9 are a group, and when the low-frequency noise is transmitted to the inside of the first sound insulation frame 5, the second sound insulation frame 7 and the inside of the third sound insulation frame 8, it can be reflected and attenuated inside the baffle plate 9, thereby further improving the Noise reduction for low frequency noise.

To sum up, the low-frequency noise reduction device for the fresh air system, when in use, is a shell installed outside the fan of the fresh air system. The vibration is reduced to reduce the generation of noise. Further, the first sound insulation frame 5 is fixedly connected to the inner side of the mounting part 3, and the fixed column 6 is fixedly connected to the inner side of the first sound insulation frame 5. The inner side of the first sound insulation frame 5 passes through The fixed column 6 is fixedly connected with the second soundproof frame 7, and the inner side of the second soundproof frame 7 is fixedly connected with the third soundproof frame 8 through the fixed column 6, and the outer shell 1 and the inner shell 4 pass through the first soundproof frame 5, the second soundproof frame The setting of the frame 7 and the third soundproof frame 8 constitutes a total of seven soundproof cavities. As we all know, the more layers, the better the sound insulation and noise reduction effect, and the first soundproof frame 5, the second soundproof frame 7 and the third soundproof frame The frame 8 is arranged around the center of the inner shell 4, and is provided on all four sides, which can reduce the overall noise of the fan and reduce the transmission effect of low-frequency noise; the inner side of the first soundproof frame 5 and the inner side of the second soundproof frame 7 and the outside, the inside and the outside of the third soundproof frame 8 are all fixedly connected with baffles 9, the baffles 9 are arranged obliquely, and each upper and lower two described baffles 9 form a group, when the low frequency noise is transmitted to the first soundproof frame 5 , the inner side of the second soundproof frame 7 and the inner side of the third soundproof frame 8, it can be reflected and attenuated inside the baffle plate 9, thereby further reducing the low frequency noise and further protecting the user.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes and modifications can be made to these embodiments without departing from the principle and spirit of the present invention , replacements and modifications, the scope of the present utility model is defined by the appended claims and their equivalents.

Claims (7)

1. A low-frequency noise reduction device for a fresh air system, characterized in that: comprising a shell (1), the inside of the shell (1) is fixedly connected with a shock absorber (2), the shock absorber (2) The other side is fixedly connected with a mounting part (3), and the bottom of the mounting part (3) is fixedly connected with an inner shell (4) through a shock-absorbing pad (2); The inner side of the mounting part (3) is fixedly connected with a first sound insulation frame (5), and the inner side of the first sound insulation frame (5) is fixedly connected with a fixed column (6), and the inner side of the first sound insulation frame (5) The inner side is fixedly connected with a second soundproof frame (7) through the fixed column (6), and the inner side of the second soundproof frame (7) is fixedly connected with the third soundproof frame (8) through the fixed column (6); Baffles (9) are fixedly connected to the inner side of the first sound insulation frame (5), the inner side and the outer side of the second sound insulation frame (7), and the inner side and the outer side of the third sound insulation frame (8). 2. A low-frequency noise reduction device for fresh air system according to claim 1, characterized in that: the shock absorbing pad (2) is made of rubber, and the vertical section shape of the mounting part (3) is "U "shape. 3. A low-frequency noise reduction device for fresh air system according to claim 1, characterized in that: the mounting part (3) is made of aluminum alloy, and the inner shell (4) is welded on the outside of the fan of the fresh air system . 4. A low-frequency noise reduction device for fresh air system according to claim 1, characterized in that: the first sound insulation frame (5) is specifically made of foamed fiber aluminum, and the first sound insulation frame (5) The length and height are greater than the length and height of the second sound insulation frame (7). 5. A low-frequency noise reduction device for fresh air system according to claim 1, characterized in that: the second sound insulation frame (7) is completely located inside the first sound insulation frame (5), and the second sound insulation frame (7) The length and height of the frame (7) are greater than the length and height of the third soundproof frame (8). 6. A low-frequency noise reduction device for fresh air system according to claim 1, characterized in that: the first sound insulation frame (5), the second sound insulation frame (5) and the second sound insulation The arrangement of the frame (7) and the third soundproof frame (8) constitutes seven soundproof cavities in total. 7. A low-frequency noise reduction device for a fresh air system according to claim 1, characterized in that: said baffles (9) are arranged obliquely, and each upper and lower two said baffles (9) form a group.

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