Noise reduction device of centrifugal fan

Abstract

The utility model relates to the technical field of noise reduction of centrifugal fans, in particular to a noise reduction device of a centrifugal fan. Comprising a bottom plate, a centrifugal fan body and an auxiliary assembly, the auxiliary assembly comprises a noise reduction box, a main sound absorption cotton plate, a temperature sensor, a silencer and a matching component, the noise reduction box is detachably connected with the bottom plate, the main sound absorption cotton plate is fixedly connected with the noise reduction box, the temperature sensor is fixedly connected with the noise reduction box, and the silencer is fixedly connected with the centrifugal fan body. A noise reduction sheet is arranged in the silencer, the matching component is arranged on the side, close to the centrifugal fan body, of the noise reduction box, the centrifugal fan body is located in the noise reduction box when working, at the moment, noise can be prevented from being transmitted to the outside through the main sound absorption cotton plate when the centrifugal fan body works, and the silencer is further installed at an air outlet of the centrifugal fan body. And therefore, the overall noise of the centrifugal fan body can be further reduced, noise pollution is reduced to a great extent, and therefore when the centrifugal fan body works, working noise can be reduced, and environmental pollution can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of noise reduction of centrifugal fans, in particular to a noise reduction device for centrifugal fans. Background Art

[0002] The existing centrifugal fan air inlet and casing are pressed out by different molds and then assembled together, which has the disadvantages of wasting materials and low production efficiency.

[0003] Prior art CN206592305U discloses a centrifugal fan, including a casing, an impeller, a motor base plate, a motor and an air inlet pipe, wherein an air inlet is arranged on the side of the casing, and the air inlet and the casing are integrally pressed and formed; the centrifugal fan can save materials and improve production efficiency.

[0004] However, when the above-mentioned centrifugal fan is actually used, when the centrifugal fan is working, the motor drives the impeller to rotate in the casing, and air is sucked in from the center of the impeller through the air intake port. Due to the dynamic effect of the blades on the gas, the gas pressure and speed are increased, and under the action of centrifugal force, the gas is thrown toward the casing along the blade path and discharged from the exhaust port. When the centrifugal fan is working, there is an overall excessive noise, which is easy to cause noise pollution to the environment. Utility Model Content

[0005] The purpose of the utility model is to provide a noise reduction device for a centrifugal fan, which can help reduce working noise and reduce environmental pollution when the centrifugal fan body is working.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: The utility model provides a centrifugal fan noise reduction device, comprising a bottom plate and a centrifugal fan body, wherein the centrifugal fan body is fixedly connected to the bottom plate and is located on the bottom plate, and further comprises an auxiliary component;

[0007] The auxiliary components include a noise reduction box, a main sound-absorbing cotton board, a temperature sensor, a muffler and a matching component. The noise reduction box is detachably connected to the bottom plate and is located on the outside of the centrifugal fan body. The main sound-absorbing cotton board is fixedly connected to the noise reduction box and is located on the inner wall of the noise reduction box. The temperature sensor is fixedly connected to the noise reduction box and is located on the noise reduction box. The muffler is fixedly connected to the centrifugal fan body and is located on the air outlet side of the centrifugal fan body. A muffler sheet is arranged inside the muffler. The matching component is arranged on the side of the noise reduction box close to the centrifugal fan body.

[0008] Wherein, the noise reduction box is provided with an installation cavity, and the installation cavity is located on a side of the noise reduction box close to the centrifugal fan body.

[0009] Wherein, the sound-absorbing sheet is V-shaped.

[0010] Among them, the matching component includes a matching plate and an auxiliary sound-absorbing cotton board. The matching plate is detachably connected to the noise reduction box and is located in the installation cavity; the auxiliary sound-absorbing cotton board is fixedly connected to the matching plate and is located on the inner side of the matching plate.

[0011] Among them, the auxiliary component also includes a fan and a sound insulation cotton board. The fan is fixedly connected to the noise reduction box and is located on the side of the noise reduction box close to the centrifugal fan body; the sound insulation cotton board is fixedly connected to the fan and is located on the fan.

[0012] The utility model discloses a centrifugal fan noise reduction device, a centrifugal fan body is installed on a bottom plate, a noise reduction box is installed on the bottom plate, and a centrifugal fan body cover is buckled inside, a main sound absorbing cotton board is installed on the inner wall of the noise reduction box, a temperature sensor is installed on the noise reduction box, a muffler is installed on the air outlet side of the centrifugal fan body, a muffler sheet is arranged inside, and a matching component is arranged on the side of the noise reduction box close to the centrifugal fan body. When the centrifugal fan body is working, it will be located in the noise reduction box. At this time, the main sound absorbing cotton board can prevent the noise from being transmitted to the outside during operation. Furthermore, a muffler is installed at the air outlet of the centrifugal fan body, so that the overall noise of the centrifugal fan body can be further reduced, thereby greatly reducing noise pollution, and then achieving when the centrifugal fan body is working, it can be beneficial to reduce working noise and reduce environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention can be further described by the non-limiting embodiments given in the accompanying drawings.

[0014] Figure 1 It is a schematic diagram of the overall structure of the centrifugal fan noise reduction device of the first embodiment of the utility model.

[0015] Figure 2 It is a schematic structural diagram of the muffler of the first embodiment of the utility model.

[0016] Figure 3 This is a schematic diagram of the installation position of the main sound-absorbing cotton board of the first embodiment of the utility model.

[0017] Figure 4 It is a schematic diagram of the position of the installation cavity of the first embodiment of the utility model.

[0018] Figure 5 It is a schematic diagram of the overall structure of a centrifugal fan noise reduction device according to the second embodiment of the utility model.

[0019] In the figure: 101-bottom plate, 102-centrifugal fan body, 103-noise reduction box, 104-main sound-absorbing cotton board, 105-temperature sensor, 106-muffler, 107-muffler sheet, 108-installation cavity, 109-matching plate, 110-auxiliary sound-absorbing cotton board, 201-fan, 202-sound insulation cotton board. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Embodiment 1:

[0022] like Figure 1 to Figure 2 As shown, Figure 1 It is a schematic diagram of the overall structure of the centrifugal fan noise reduction device. Figure 2 is a schematic diagram of the structure of the muffler 106, Figure 3 Schematic diagram of the installation position of the main sound-absorbing cotton board 104. Figure 4 It is a schematic diagram of the position of the installation cavity 108. The utility model provides a centrifugal fan noise reduction device: including a bottom plate 101, a centrifugal fan body 102 and an auxiliary component, the auxiliary component includes a noise reduction box 103, a main sound-absorbing cotton board 104, a temperature sensor 105, a muffler 106 and a matching component, a muffler 106 is provided with a muffler sheet 107 inside, and the matching component includes a matching plate 109 and an auxiliary sound-absorbing cotton board 110. Through the above scheme, it can be achieved that when the centrifugal fan body 102 is working, it can be beneficial to reduce working noise and reduce environmental pollution. It can be understood that the above scheme can reduce the working noise of the centrifugal fan body 102 and reduce environmental pollution.

[0023] In this embodiment, the centrifugal fan body 102 is fixedly connected to the bottom plate 101 and is located on the bottom plate 101 . The centrifugal fan body 102 is mounted on the bottom plate 101 by bolts.

[0024] Among them, the noise reduction box 103 is detachably connected to the base plate 101 and is located on the outside of the centrifugal fan body 102, the main sound-absorbing cotton board 104 is fixedly connected to the noise reduction box 103 and is located on the inner wall of the noise reduction box 103, the temperature sensor 105 is fixedly connected to the noise reduction box 103 and is located on the noise reduction box 103, the muffler 106 is fixedly connected to the centrifugal fan body 102 and is located on the air outlet side of the centrifugal fan body 102, a muffler sheet 107 is arranged inside the muffler 106, and the mating component is arranged on the side of the noise reduction box 103 close to the centrifugal fan body 102. The noise reduction box 103 is installed on the base plate 101 by bolts, and an avoidance cavity is provided on the rear side to avoid the circular air inlet duct of the centrifugal fan body 102. After installation, the centrifugal fan body 102 is covered and buckled inside. The main sound-absorbing cotton board 104 is fixed to the front and rear, left and right side walls and top wall of the noise reduction box 103 by precision screws. The bottom connecting part of the muffler 106 is installed on the air outlet of the centrifugal fan body 102 by bolts. The interior of the muffler 106 is square, and a muffler sheet 107 is provided inside. The temperature sensor 105 is installed on the noise reduction box 103 by bolts for detecting the internal temperature and feeding it back to the external control system. The matching component is arranged on the side of the noise reduction box 103 close to the centrifugal fan body 102 for matching noise reduction.

[0025] Secondly, the noise reduction box 103 has an installation cavity 108, and the installation cavity 108 is located on a side of the noise reduction box 103 close to the centrifugal fan body 102. The installation cavity 108 is opened outside the avoidance cavity at the rear side of the noise reduction box 103.

[0026] Then, the muffler sheet 107 is V-shaped. The muffler sheet 107 adopts a V-shaped structural design, which can effectively increase the area of ​​the muffler sheet 107 and improve the muffler effect.

[0027] Finally, the matching plate 109 is detachably connected to the noise reduction box 103 and is located in the installation cavity 108; the auxiliary sound-absorbing cotton board 110 is fixedly connected to the matching plate 109 and is located inside the matching plate 109. The matching plate 109 is installed on the noise reduction box 103 by bolts, and the auxiliary sound-absorbing cotton board 110 is installed on the matching plate 109 by precision screws.

[0028] When the centrifugal fan body 102 is working, the working noise can be reduced and the environmental pollution can be reduced. First, the installation assembly is performed, the centrifugal fan body 102 is installed on the bottom plate 101, and then the noise reduction box 103 is installed on the bottom plate 101, so that the centrifugal fan body 102 is buckled inside, and then the muffler 106 is installed, and further, the matching plate 109 is installed, and finally the bottom plate 101 is fixed. When the centrifugal fan body 102 is working, it will be located in the noise reduction box 103. At this time, through the main The sound-absorbing cotton board 104 and the auxiliary sound-absorbing cotton board 110 can prevent the noise from being transmitted to the outside during operation. Furthermore, the muffler 106 is installed at the air outlet of the centrifugal fan body 102, so that the overall noise of the centrifugal fan body 102 can be further reduced, thereby greatly alleviating noise pollution. The temperature sensor 105 can perform internal temperature detection, which is beneficial for users to timely understand the working environment temperature of the driving motor of the centrifugal fan body 102, thereby achieving the reduction of working noise and environmental pollution when the centrifugal fan body 102 is working.

[0029] Embodiment 2:

[0030] like Figure 5 As shown, Figure 5 It is a schematic diagram of the overall structure of the centrifugal fan noise reduction device. On the basis of the first embodiment, the utility model provides a centrifugal fan noise reduction device, and the auxiliary components also include a fan 201 and a sound insulation cotton board 202.

[0031] The fan 201 is fixedly connected to the noise reduction box 103 and is located on the side of the noise reduction box 103 close to the centrifugal fan body 102; the sound insulation board 202 is fixedly connected to the fan 201 and is located on the fan 201. The fan 201 is installed on the noise reduction box 103 by bolts. After installation, it is located at the rear side of the driving motor of the centrifugal fan body 102. The sound insulation board 202 is provided with vents to facilitate the fan 201 to inhale external cold air, and is installed on the outside of the fan 201 by bolts for sound insulation to reduce the transmission of internal noise.

[0032] In this embodiment, the fan 201 is provided to dissipate heat for the driving motor of the centrifugal fan body 102. The sound insulation cotton board 202 is provided to provide sound insulation treatment, thereby reducing the transmission of internal noise and noise pollution. At the same time, a dustproof net is installed on the back side of the noise reduction box 103 for ventilation and dust prevention, and cooperates with the fan 201 to assist in heat dissipation.

[0033] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A centrifugal fan noise reduction device, comprising a bottom plate and a centrifugal fan body, wherein the centrifugal fan body is fixedly connected to the bottom plate and is located on the bottom plate, characterized in that: Also included are auxiliary components; The auxiliary components include a noise reduction box, a main sound-absorbing cotton board, a temperature sensor, a muffler and a matching component. The noise reduction box is detachably connected to the bottom plate and is located on the outside of the centrifugal fan body. The main sound-absorbing cotton board is fixedly connected to the noise reduction box and is located on the inner wall of the noise reduction box. The temperature sensor is fixedly connected to the noise reduction box and is located on the noise reduction box. The muffler is fixedly connected to the centrifugal fan body and is located on the air outlet side of the centrifugal fan body. A muffler sheet is arranged inside the muffler. The matching component is arranged on the side of the noise reduction box close to the centrifugal fan body.

2. The centrifugal fan noise reduction device according to claim 1, characterized in that: The noise reduction box is provided with an installation cavity, and the installation cavity is located on a side of the noise reduction box close to the centrifugal fan body.

3. The centrifugal fan noise reduction device according to claim 1, characterized in that: The sound-absorbing sheet is V-shaped.

4. The centrifugal fan noise reduction device according to claim 2, characterized in that: The mating component includes a mating plate and an auxiliary sound-absorbing cotton board. The mating plate is detachably connected to the noise reduction box and is located in the installation cavity; the auxiliary sound-absorbing cotton board is fixedly connected to the mating plate and is located on the inner side of the mating plate.

5. The centrifugal fan noise reduction device according to claim 1, characterized in that: The auxiliary component also includes a fan and a sound insulation cotton board. The fan is fixedly connected to the noise reduction box and is located on the side of the noise reduction box close to the centrifugal fan body; the sound insulation cotton board is fixedly connected to the fan and is located on the fan.

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