Efficient sound insulation and noise reduction centrifugal fan

Abstract

The utility model discloses an efficient sound insulation and noise reduction centrifugal fan, relates to the technical field of fans, and aims to solve the technical problems that when an existing centrifugal fan runs, large noise is generated due to motor running, impeller air cutting and fan vibration, the surrounding environment is interfered, and the physical and psychological health of operators is not facilitated. A fan mechanism is arranged at one end of the upper surface of the bottom plate, a noise reduction mechanism is arranged in the fan mechanism, a driving mechanism is arranged at the other end of the upper surface of the bottom plate, the driving mechanism is in power connection with the fan mechanism, the noise reduction mechanism comprises an insertion block, a frame is arranged on the side face of the insertion block, and sound absorption cotton is inserted into the frame. By designing the sound-absorbing cotton structure, airflow noise generated when the impeller in the machine shell rotates at a high speed to cut air and mechanical noise generated when the impeller vibrates can be absorbed and eliminated by the sound-absorbing cotton structure, interference to the surrounding environment is reduced, and physical and psychological health of operators is protected.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, and more specifically, to a high-efficiency sound-insulating and noise-reducing centrifugal fan. Background Technology

[0002] As a common type of general-purpose machinery, fans are widely used in many fields such as industrial production, civil buildings, and HVAC, playing a crucial role in conveying gas and ventilating. There are various types of fans, among which centrifugal fans stand out due to their compact structure, high air pressure, and wide flow range, becoming the preferred choice in many scenarios.

[0003] However, in practical use, existing centrifugal fans have also revealed significant shortcomings. Especially in noise control, when the centrifugal fan is running, the combined noise from the motor, the airflow noise generated by the high-speed rotation of the impeller cutting through the air, and the mechanical noise caused by fan vibration results in a persistently high overall noise level. This not only disturbs the surrounding environment but may also adversely affect the physical and mental health of operators. Therefore, we propose a high-efficiency sound-insulating and noise-reducing centrifugal fan. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a high-efficiency sound insulation and noise reduction centrifugal fan to solve the technical problem that existing centrifugal fans generate a lot of noise during operation due to motor operation, impeller cutting air and fan vibration, which disturbs the surrounding environment and is detrimental to the physical and mental health of operators.

[0005] To solve the above technical problems, this utility model provides the following technical solution: a high-efficiency sound-insulating and noise-reducing centrifugal fan, including a base plate, a fan mechanism arranged at one end of the upper surface of the base plate, a noise-reducing mechanism arranged inside the fan mechanism, and a drive mechanism arranged at the other end of the upper surface of the base plate, and the drive mechanism is poweredly connected to the fan mechanism;

[0006] The noise reduction mechanism includes an insert block, a frame arranged on the side of the insert block, the frame having a wave-like structure, sound-absorbing cotton inserted inside the frame, and a slot opened through the frame, through which the sound-absorbing cotton is exposed.

[0007] Preferably, the fan mechanism includes a housing, an insertion port is provided through the side of the outer front surface of the housing, a plug is inserted into the insertion port, an air inlet is provided in the middle of the outer front surface of the housing, a filter is arranged in the air inlet, and an air outlet is provided at the upper end of the outer surface of the housing.

[0008] Preferably, a shaft is rotatably mounted at the rear end inside the housing, and an impeller is fixed at one end of the shaft, with the impeller arranged in the middle inside the housing.

[0009] Preferably, the driving mechanism comprises a driving motor, a belt pulley A is fixed at the output end of the driving motor, a transmission belt is wound on the belt pulley A, one end of the transmission belt is wound on a belt pulley B, and the belt pulley B is fixed at the other end of the shaft rod.

[0010] Preferably, the sound-absorbing cotton is inserted with a supporting piece made of stainless steel material.

[0011] Compared with the prior art, the utility model has the advantages that:

[0012] 1、The sound-absorbing cotton structure is designed, air flow noise generated by high-speed rotation of the impeller in the machine shell and mechanical noise generated by vibration of the impeller can be absorbed and eliminated, the interference on the surrounding environment is reduced, the physical and mental health of the operator is protected, the sound-absorbing cotton can be inserted into the frame and sent into the machine shell, the limiting placement position is provided, the problem that the sound-absorbing cotton is difficult to remove after being fixed by using glue in the prior art is solved, the supporting piece made of stainless steel material can delay corrosion and damage after being used for a long time after being installed in the machine shell, the service life is improved, and the supporting force is provided when the sound-absorbing cotton needs to be pulled out of the frame or inserted and installed into the frame, so that the sound-absorbing cotton is conveniently pulled out and inserted.

[0013] 2、The frame with the wave structure design makes the sound-absorbing cotton inserted into the frame also have a wave structure, the wave-shaped sound-absorbing cotton has an irregular surface shape, the surface area of the sound-absorbing cotton in contact with sound waves can be increased through the shape, when noise sound waves generated by the impeller propagate to the surface of the sound-absorbing cotton, more sound wave energy can be absorbed and converted by the fiber structure in the sound-absorbing cotton, and the noise sound waves generated by the impeller can be absorbed and eliminated by the sound-absorbing cotton inserted and installed in the frame through the groove.

[0014] 3、The plug and the plug block structure are designed, the frame connected with the plug block and the sound-absorbing cotton inserted into the frame can be inserted into the position of the inner wall of the machine shell through the plug, so that the sound-absorbing cotton is conveniently installed in advance and removed later, the air inlet and the air outlet are matched, air outside the machine shell can be sucked in and discharged through the air inlet and the air outlet when the impeller in the machine shell rotates, the filter screen is installed, and impurities contained in external air can be filtered when the external air enters the machine shell through the air inlet, so that too many impurities are prevented from adhering to the impeller, and the resistance of air flow to the impeller is prevented from being increased and the air volume is prevented from being reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a front view of the appearance structure of the utility model;

[0016] Figure 2 It is a structure schematic view of the rear end of the machine shell of the utility model;

[0017] Figure 3 The utility model discloses a casing front end cut open structure schematic diagram shows the structure of the utility model;

[0018] Figure 4 The utility model discloses a noise reduction mechanism from the casing separates out structure schematic diagram shows the structure of the utility model;

[0019] Figure 5 The utility model discloses a noise reduction mechanism front view not separate structure schematic diagram shows the structure of the utility model;

[0020] Figure 6 The utility model discloses a noise reduction mechanism rear view has separated structure schematic diagram shows the structure of the utility model;

[0021] Figure 7 The utility model discloses a sound absorption cotton internal structure schematic diagram shows the structure of the utility model;

[0022] Figure 8 The utility model discloses a drive mechanism structure schematic diagram.

[0023] Mark explanation in drawing:

[0024] 1, bottom plate, 2, fan mechanism, 201, casing, 202, socket, 203, air inlet, 204, filter screen, 205, air outlet, 206, shaft rod, 207, impeller, 3, noise reduction mechanism, 301, insert block, 302, frame, 303, sound absorption cotton, 304, slot, 305, bracing piece, 4, drive mechanism, 401, drive motor, 402, belt disc A, 403, transmission belt, 404, belt disc B. Specific implementation

[0025] As Figures 1 to 8 The utility model discloses a kind of high-efficiency sound insulation noise reduction centrifugal fan, including bottom plate 1, fan mechanism 2 is arranged on the upper surface one end of bottom plate 1, noise reduction mechanism 3 is arranged in fan mechanism 2, drive mechanism 4 is arranged on the upper surface another end of bottom plate 1, and drive mechanism 4 is connected with fan mechanism 2 power.

[0026] The noise reduction mechanism 3 comprises an insertion block 301, the insertion block 301 is provided with a frame 302 on the side, the frame 302 is in wave structure, sound-absorbing cotton 303 is inserted into the frame 302, and the frame 302 is provided with a notch 304, and the sound-absorbing cotton 303 is exposed through the notch 304.The frame 302 is designed, the sound-absorbing cotton 303 can be inserted into and positioned and sent into the shell 201, a limiting placement position is provided, the problem that sound-absorbing cotton 303 is difficult to remove after being fixed by using glue in the prior art is solved, the structure of the sound-absorbing cotton 303 is designed, the airflow noise generated by the high-speed rotation of the impeller 207 in the shell 201 and the mechanical noise generated by the vibration of the impeller 207 can be absorbed and eliminated, the interference on the surrounding environment is reduced, the physical and mental health of the operator is protected, the frame 302 in wave structure makes the sound-absorbing cotton 303 inserted into also in wave structure, the sound-absorbing cotton 303 in wave shape has irregular surface shape, the surface area of sound waves contacting the sound-absorbing cotton 303 can be increased by the shape, when the noise sound waves generated by the impeller 207 propagate to the surface of the sound-absorbing cotton 303, more sound wave energy can be absorbed and converted by the fiber structure inside the sound-absorbing cotton 303, and the notch 304 is provided, so that the noise sound waves generated by the impeller 207 can be absorbed and eliminated by the sound-absorbing cotton 303 inserted and installed in the frame 302.

[0027] In the embodiment of the utility model, fan mechanism 2 includes shell 201, shell 201 outside front surface side is provided with the insertion 202 that is opened and passed through, the insertion 202 inserts insertion block 301, shell 201 outside front surface middle is provided with air inlet 203, air inlet 203 is provided with filter screen 204, shell 201 outside upper end is provided with air outlet 205.The insertion 202 and insertion block 301 structure of the utility model are designed, so that the frame 302 connected with insertion block 301 and the sound-absorbing cotton 303 inserted inside can be inserted into the inner wall position of shell 201 through the insertion 202, so that the early installation and later removal are facilitated, and the cooperation of air inlet 203 and air outlet 205 makes the impeller 207 in shell 201 rotate and pass through here to suck and discharge external gas, and the installation of filter screen 204 can filter the impurities contained in the external gas entering shell 201 through air inlet 203, so that too much impurities are adhered on the impeller 207, the resistance of airflow passing through the impeller 207 is increased, and the air volume is reduced.

[0028] In the embodiment of the utility model, the shaft 206 is rotatably installed at the rear end of the shell 201, one end of the shaft 206 is fixedly provided with the impeller 207, and the impeller 207 is arranged in the middle of the shell 201.The installation of the impeller 207 of the utility model can generate negative pressure suction in the shell 201, external gas is sucked into the shell 201 through the air inlet 203, and then is discharged through the air outlet 205.

[0029] In the embodiment of the utility model, drive mechanism 4 includes drive motor 401, drive motor 401 output fixed with pulley A 402, pulley A 402 is wound with transmission belt 403, one end of transmission belt 403 is wound in pulley B 404, pulley B 404 is fixed at the other end of shaft 206. The drive motor 401 installation of the utility model makes pulley A 402 can actively rotate, plays the effect of power output, by designing pulley A 402, transmission belt 403 and pulley B 404 structure, the rotation of drive motor 401 output can be transmitted to the shaft 206, indirectly drive impeller 207 in the casing 201, plays the effect of transmission.

[0030] In the embodiment of the utility model, sound-absorbing cotton 303 is inserted with support 305, support 305 is made of stainless steel material. The utility model discloses a support 305 made of stainless steel material can delay corrosion damage after being installed in casing 201 with sound-absorbing cotton 303 for a long time, improve the service life, provide support force when sound-absorbing cotton 303 needs to be extracted from frame 302 or inserted and installed in, facilitate staff to extract and insert it.

[0031] Working principle: the embodiment provides a kind of high-efficiency sound insulation noise reduction centrifugal fan, when using, staff need first to the utility model is powered, the utility model is operated by control panel control, staff need first to the sound-absorbing cotton 303 for noise reduction is inserted into frame 302, after being inserted into, staff will insert block 301 entirely into the socket 202, then cooperate bolt and fix insert block 301 on casing 201, then fix sound-absorbing cotton 303 on the inner wall of casing 201, after the installation of sound-absorbing cotton 303, staff can start drive motor 401, drive motor 401 rotates the fixed pulley A 402 of output end, pulley A 402 drives pulley B 404 to rotate by transmission belt 403, pulley B 404 again takes shaft 206 and rotates, shaft 206 will take fixed impeller 207 at one end and rotate in casing 201, rotating impeller 207 is in by air inlet 203 The external gas is extracted into, then is discharged by air outlet 205, at this time, the noise generated in casing 201 is inhaled and eliminated by the sound-absorbing cotton 303 inserted in frame 302, to reach the effect of noise reduction, when sound-absorbing cotton 303 needs to be replaced, staff twists the bolt of fastening noise reduction mechanism 3, after being unscrewed, the insert block 301 in noise reduction mechanism 3 is extracted from the casing 201 in fan mechanism 2, to facilitate replacement and reuse.

[0032] The utility model discloses an embodiment discloses the better embodiment, but is not limited to this, and the ordinary skill of the art, the spirit of the utility model is appreciated to the above -mentioned embodiment, and different extension and change are made, but as long as not departing from the spirit of the utility model, all are in the protection range of the utility model.

Claims

1. A high-efficiency sound-insulating and noise-reducing centrifugal fan, comprising a base plate (1), characterized in that: A fan mechanism (2) is arranged at one end of the upper surface of the base plate (1), a noise reduction mechanism (3) is arranged inside the fan mechanism (2), and a drive mechanism (4) is arranged at the other end of the upper surface of the base plate (1), and the drive mechanism (4) is poweredly connected to the fan mechanism (2). The noise reduction mechanism (3) includes an insert (301), a frame (302) is arranged on the side of the insert (301), the frame (302) is in a wave-like structure, sound-absorbing cotton (303) is inserted into the frame (302), and a slot (304) is opened through the frame (302), through which the sound-absorbing cotton (303) is exposed.

2. The high-efficiency sound-insulating and noise-reducing centrifugal fan according to claim 1, characterized in that: The fan mechanism (2) includes a housing (201), with a slot (202) extending through the side of the front outer surface of the housing (201), into which a plug (301) is inserted, an air inlet (203) is provided in the middle of the front outer surface of the housing (201), a filter (204) is arranged in the air inlet (203), and an air outlet (205) is provided at the upper outer end of the housing (201).

3. The high-efficiency sound-insulating and noise-reducing centrifugal fan according to claim 2, characterized in that: A shaft (206) is rotatably mounted at the rear end inside the housing (201). An impeller (207) is fixed at one end of the shaft (206), and the impeller (207) is arranged in the middle inside the housing (201).

4. The high-efficiency sound-insulating and noise-reducing centrifugal fan according to claim 3, characterized in that: The drive mechanism (4) includes a drive motor (401), and a pulley A (402) is fixed at the output end of the drive motor (401). A transmission belt (403) is wound on the pulley A (402), and one end of the transmission belt (403) is wound inside a pulley B (404). The pulley B (404) is fixed to the other end of the shaft (206).

5. The high-efficiency sound-insulating and noise-reducing centrifugal fan according to claim 4, characterized in that: A support member (305) is inserted inside the sound-absorbing cotton (303), and the support member (305) is made of stainless steel.

Images