A fan with a resonance-eliminating and noise-reducing mechanism

Abstract

The present invention discloses a fan with a resonance-eliminating and noise-reducing mechanism. The fan comprises a body, an air inlet pipe and an air outlet pipe connected to the body, a resonance-eliminating mechanism disposed on the air outlet pipe, and a noise-reducing mechanism connected to the resonance-eliminating mechanism. The resonance-eliminating mechanism comprises a threaded tube connected to the air outlet pipe, the inner surface of the threaded tube being uneven and used to change the direction of gas flow so that the gas moves along a zigzag route. The noise-reducing mechanism comprises an air duct, sound-absorbing cotton, and a small hole plate connected to the threaded tube. The air duct is provided with a small hole plate, the outer surface of the small hole plate being covered with sound-absorbing cotton. The small hole plate and the sound-absorbing cotton reduce the vibration amplitude of the gas entering the air duct. The present invention performs a two-step treatment on the exhaust gas of the fan. After the resonance is eliminated, the gas is more effectively noise-reduced, greatly improving the noise reduction effect. The sound of the fan exhaust can be reduced to 70-80 decibels.

Description

Technical field:

[0001] The invention belongs to the technical field of noise reduction, and in particular relates to a fan with a resonance-eliminating noise reduction mechanism. Background technology:

[0002] Fans are widely used in various industrial scenarios to exhaust gases from equipment or systems. When fans are operating, the gases in the ventilation ducts vibrate, causing noise that can harm the surrounding environment and workers.

[0003] The vibration of gas sometimes resonates, which amplifies the noise. If you simply reduce the noise generated by the gas vibration without eliminating the resonance of the gas, the noise reduction effect will not be obvious.

[0004] The information disclosed in this background technology section is only intended to enhance understanding of the overall background of the invention and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention:

[0005] The object of the present invention is to provide a fan with a resonance elimination and noise reduction mechanism, which eliminates the resonance of the gas and then reduces the noise generated by the gas vibration, thereby overcoming the defects in the above-mentioned prior art.

[0006] To achieve the above-mentioned objectives, the present invention provides a fan with a resonance-eliminating and noise-reducing mechanism, comprising a body, an air inlet pipe and an air outlet pipe connected to the body, a resonance-eliminating mechanism arranged on the air outlet pipe, and a noise-reduction mechanism connected to the resonance-eliminating mechanism; the resonance-eliminating mechanism comprises a threaded tube, which is connected to the air outlet pipe, and the inner surface of the threaded tube is uneven, which is used to change the flow direction of the gas and make the gas move along a tortuous route; the noise-reduction mechanism comprises an air duct, sound-absorbing cotton, and a small hole plate, which is connected to the threaded tube, and a small hole plate is arranged in the air duct, and the outer surface of the small hole plate is covered with sound-absorbing cotton. The small hole plate and the sound-absorbing cotton are used to reduce the vibration amplitude of the gas entering the air duct, thereby reducing noise.

[0007] Preferably, in the technical solution, the resonance elimination mechanism also includes an adjusting cylinder, a vacuum degree collection sensor, and a closed shell cover. The vacuum degree collection sensor is arranged on the air inlet pipe, the adjusting cylinder is arranged on the air duct, the vacuum degree collection sensor is electrically connected to the adjusting cylinder, the closed shell cover is arranged at the entrance of the air duct, the threaded tube is connected to the closed shell cover, the output end piston of the adjusting cylinder extends into the closed shell cover, the output end piston is aligned with the threaded tube outlet, and an air outlet structure is provided on the output end piston. The adjusting cylinder controls the air outlet of the threaded tube outlet according to the vacuum degree in the air inlet pipe, and the noise generated by the gas resonance is sealed in the threaded tube.

[0008] Preferably, in the technical solution, when the vacuum degree in the air inlet pipe is less than -25kPa, the regulating cylinder does not move, and the gas output from the threaded tube outlet is the largest; when the vacuum degree in the air inlet pipe is between -25kPa and -50kPa, the piston at the output end of the regulating cylinder gradually approaches the threaded tube outlet, and the gas output from the threaded tube outlet gradually decreases; when the vacuum degree in the air inlet pipe is greater than -50kPa, the piston at the output end of the regulating cylinder closes the threaded tube outlet, and the gas output from the threaded tube outlet reaches the minimum value.

[0009] Preferably, in the technical solution, the air outlet structure on the output end piston is evenly distributed air outlet holes, the output end piston is a circular structure, and the angle between adjacent air outlet holes and the center of the circle is 90°.

[0010] Preferably, in the technical solution, the air duct includes a front part, a middle part, and a rear part. The front part is vertically arranged with the middle part, and the rear part is vertically arranged with the front part and the middle part. The front part, the middle part, and the rear part are connected in sequence, thereby extending the time for the gas to pass through the air duct and improving the noise reduction effect.

[0011] Preferably, in the technical solution, the orifice plate is made of stainless steel.

[0012] Preferably, in the technical solution, the sound-absorbing cotton is made of high-temperature resistant silicate glass fiber cotton.

[0013] Compared with the prior art, the present invention eliminates resonance of the gas in the air outlet pipe and then reduces noise of the gas. The present invention has the following beneficial effects:

[0014] The exhaust gas from the fan is processed in two steps to remove the resonance and reduce the noise of the gas more effectively, which greatly improves the noise reduction effect. The sound of the fan exhaust can be reduced to 70-80 decibels. Description of the drawings:

[0015] Figure 1 This is a schematic diagram of the fan structure with a resonance elimination and noise reduction mechanism according to the present invention;

[0016] Figure 2 This is a schematic diagram of the structure of the resonance elimination mechanism of the present invention;

[0017] Figure 3 This is a schematic diagram of the structure of the piston at the output end of the regulating cylinder of the present invention;

[0018] Figure 4 This is a schematic diagram of the noise reduction mechanism structure of the present invention;

[0019] Figure 5 This is a cross-sectional view of the threaded pipe of the present invention;

[0020] The figures are marked as follows: 1-body, 2-air inlet pipe, 3-air outlet pipe, 4-threaded pipe, 5-adjusting cylinder, 6-vacuum acquisition sensor, 7-sealed shell, 8-output end piston, 9-air outlet, 10-air duct, 11-sound-absorbing cotton, 12-small hole plate, 13-front, 14-middle, 15-rear, 16-air duct exhaust port. Specific implementation method:

[0021] The specific embodiments of the present invention are described in detail below, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0022] Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations such as "include" or "comprising", etc., will be understood to include the stated elements or components but not to exclude other elements or other components.

[0023] like Figure 1-5 As shown, a fan with a resonance elimination and noise reduction mechanism includes a body 1, an air inlet pipe 2 and an air outlet pipe 3 connected to the body 1, a resonance elimination mechanism arranged on the air outlet pipe 3, and a noise reduction mechanism connected to the resonance elimination mechanism; the resonance elimination mechanism includes a threaded tube 4, an adjustment cylinder 5, a vacuum acquisition sensor 6, and a closed shell 7. The threaded tube 4 is connected to the air outlet pipe 3, and the inner surface of the threaded tube 4 is uneven, which is used to change the gas flow direction so that the gas moves along a tortuous route; the vacuum acquisition sensor 6 is arranged on the air inlet pipe 2, and the adjustment cylinder 5 is arranged in the air duct 1 0, the vacuum degree collection sensor 6 is electrically connected to the regulating cylinder 5, the closed shell 7 is set at the entrance of the air duct 10, the threaded tube 4 is connected to the closed shell 7, the output end piston 8 of the regulating cylinder 5 extends into the closed shell 7, the output end piston 8 is aligned with the outlet of the threaded tube 4, and the output end piston 8 is provided with evenly distributed air outlet holes 9. The output end piston 8 is a circular structure, and the angle between adjacent air outlet holes 9 and the center of the circle is 90 degrees. The regulating cylinder 5 controls the air output volume of the outlet of the threaded tube 4 according to the vacuum degree in the air inlet pipe 2, and the noise generated by the gas resonance is sealed in the threaded tube 4. The noise reduction mechanism includes an air duct 10, sound-absorbing cotton 11, and a small hole plate 12. The air duct 10 is connected to the threaded tube 4. The small hole plate 12 is provided in the air duct 10, and the outer surface of the small hole plate 12 is covered with sound-absorbing cotton 11. The small hole plate 12 and the sound-absorbing cotton 11 reduce the vibration amplitude of the gas entering the air duct 10, thereby reducing noise. The air duct 10 includes a front portion 13, a middle portion 14, and a rear portion 15. The front portion 13 and the middle portion 14 are arranged perpendicularly, and the rear portion 15 is arranged perpendicularly to the front portion 13 and the middle portion 14. The front portion 13, the middle portion 14, and the rear portion 15 are sequentially connected, which prolongs the passage time of air in the air duct 10 and improves the noise reduction effect. The orifice plate 12 is made of stainless steel. The sound-absorbing cotton 11 is made of high-temperature resistant silicate glass fiber cotton.

[0024] The fan draws air in through the air inlet pipe 2 and discharges it through the air outlet pipe 3. The air passes through the threaded pipe 4, changing its direction multiple times and removing some resonance. A vacuum sensor 6 detects the vacuum level within the air inlet pipe 2. When the vacuum level within the air inlet pipe 2 is less than -25kPa, the regulating cylinder 5 remains inactive, and the air output from the threaded pipe 4 outlet is at its maximum. When the vacuum level within the air inlet pipe 2 is between -25kPa and -50kPa, the piston 8 at the output end of the regulating cylinder 5 gradually approaches the outlet of the threaded pipe 4, gradually decreasing the air output from the outlet. When the vacuum level within the air inlet pipe 2 is greater than -50kPa, the piston 8 at the output end of the regulating cylinder 5 closes the outlet of the threaded pipe 4, and the air output from the outlet of the threaded pipe 4 reaches its minimum. The regulating cylinder 5 is adjusted according to the vacuum level within the air inlet pipe 2. When the vacuum level is high, the amount of gas discharged by the fan is large, and the noise generated by the gas resonance is loud. The corresponding control output end piston 8 increases the sealing degree of the outlet of the threaded tube 4. When the vacuum level is low, the amount of gas discharged by the fan is small, and the noise generated by the gas resonance is low. The corresponding control output end piston 8 reduces the sealing degree of the outlet of the threaded tube 4. Due to the obstruction of the output end piston 8, the noise generated by the resonance is blocked inside the threaded tube 4, further eliminating the resonance within the threaded tube 4. The gas enters the air duct 10 at a small flow rate from the outlet hole 9 on the output end piston 8. In the winding air duct 10, the gas vibration amplitude is reduced by the small hole plate 12 and the sound-absorbing cotton 10, which more effectively reduces the noise of the gas and greatly improves the noise reduction effect. The exhaust sound at the air duct exhaust port 16 can be reduced to 70-80 decibels.

[0025] The foregoing descriptions of specific exemplary embodiments of the present invention are for purposes of illustration and description. These descriptions are not intended to limit the invention to the precise forms disclosed, and it is apparent that many variations and modifications are possible in light of the foregoing teachings. The exemplary embodiments have been selected and described for the purpose of explaining the specific principles of the invention and their practical application, thereby enabling those skilled in the art to realize and utilize a variety of exemplary embodiments of the invention and various options and modifications. The scope of the invention is intended to be defined by the claims and their equivalents.

Claims

1. A fan with a resonance elimination and noise reduction mechanism, characterized in that: The utility model comprises a machine body, an air inlet pipe and an air outlet pipe connected to the machine body, a resonance elimination mechanism arranged on the air outlet pipe, and a noise reduction mechanism connected to the resonance elimination mechanism; the resonance elimination mechanism comprises a threaded tube, which is connected to the air outlet pipe, and the inner surface of the threaded tube is uneven, which is used to change the flow direction of the gas and make the gas move along a tortuous route; the noise reduction mechanism comprises an air duct, sound-absorbing cotton, and a small hole plate, which is connected to the threaded tube, and a small hole plate is arranged in the air duct, and the outer surface of the small hole plate is covered with sound-absorbing cotton, so that the vibration amplitude of the gas entering the air duct is reduced by the small hole plate and the sound-absorbing cotton; the resonance elimination mechanism comprises a threaded tube, which is connected to the air outlet pipe, and the inner surface of the threaded tube is uneven, which is used to change the flow direction of the gas and make the gas move along a tortuous route; the noise reduction mechanism comprises an air duct, sound-absorbing cotton, and a small hole plate, which is connected to the threaded tube, and the air duct is provided with a small hole plate, and the outer surface of the small hole plate is covered with sound-absorbing cotton, and the vibration amplitude of the gas entering the air duct is reduced by the small hole plate and the sound-absorbing cotton; the noise elimination mechanism comprises a threaded tube, which is connected to the air outlet pipe, and the inner surface of the threaded tube is covered with sound-absorbing cotton, and the vibration amplitude of the gas entering the air duct is reduced by the threaded tube and the sound-absorbing cotton; the noise reduction mechanism comprises an air duct, sound-absorbing cotton, and a small hole plate, which is connected to the threaded tube ... In addition to the resonance mechanism, it also includes an adjusting cylinder, a vacuum degree collection sensor, and a closed shell cover. The vacuum degree collection sensor is arranged on the air inlet pipe, the adjusting cylinder is arranged on the air duct, the vacuum degree collection sensor is electrically connected to the adjusting cylinder, the closed shell cover is arranged at the entrance of the air duct, the threaded tube is connected to the closed shell cover, the output end piston of the adjusting cylinder extends into the closed shell cover, the output end piston is aligned with the threaded tube outlet, and an air outlet structure is provided on the output end piston. The adjusting cylinder controls the air outlet of the threaded tube outlet according to the vacuum degree in the air inlet pipe, and the noise generated by the gas resonance is sealed in the threaded tube.

2. The fan with a resonance elimination and noise reduction mechanism according to claim 1, characterized in that: When the vacuum degree in the air inlet pipe is less than -25 kPa, the regulating cylinder does not move and the gas output from the threaded tube outlet is the largest; when the vacuum degree in the air inlet pipe is between -25 kPa and -50 kPa, the piston at the output end of the regulating cylinder gradually approaches the threaded tube outlet, and the gas output from the threaded tube outlet gradually decreases; when the vacuum degree in the air inlet pipe is greater than -50 kPa, the piston at the output end of the regulating cylinder closes the threaded tube outlet, and the gas output from the threaded tube outlet reaches the minimum value.

3. The fan with a resonance elimination and noise reduction mechanism according to claim 1, characterized in that: The air outlet structure on the output end piston is a uniformly distributed air outlet hole. The output end piston is a circular structure, and the angle between adjacent air outlet holes and the center of the circle is 90 degrees.

4. The fan with a resonance elimination and noise reduction mechanism according to claim 1, characterized in that: The orifice plate is made of stainless steel.

5. The fan with a resonance elimination and noise reduction mechanism according to claim 1, characterized in that: The sound-absorbing cotton is made of high-temperature resistant silicate glass fiber cotton.

6. The fan with a resonance elimination and noise reduction mechanism according to claim 1, characterized in that: The air duct comprises a front part, a middle part and a rear part. The front part is vertically arranged with the middle part, the rear part is vertically arranged with the front part and the middle part, and the front part, the middle part and the rear part are connected in sequence.

Images