8results about How to "Reduce intake noise" patented technology

The utility model discloses a filter sound -absorbing structure is used to compressor air intake, including front cover, back cover, filter component, the front cover is fixedly connected with back cover and forms the internal cavity, be equipped with a plurality of baffle and sound -absorbing cotton in the internal cavity, the filter component is provided with air inlet and air outlet, the upper portion of front cover sets up the installation cavity, the installation cavity can dismantle and install filter component, the bottom of back cover sets up the air outlet, the length of baffle is less than the length of internal cavity, a plurality of baffles are mutually staggered arrangement, and the airflow channel is formed between mutually staggered arrangement baffle. The utility model integrates filter and sound -absorbing function in the same structure, replaces traditional discrete scheme, before compressor air intake, through the utility model can play the double -deck effect of filter and sound -absorbing, reduces equipment occupied space simultaneously, reduces installation layout difficulty, simplifies installation and maintenance process, and then reduces comprehensive cost.

The utility model relates to the technical field of air filter accessories, and discloses an automobile air filter pipe fitting with a noise reduction structure, which comprises a pipe fitting body, a rod body of the pipe fitting body is an inclined irregular rectangle with a plane top end and a plane bottom end, and the bottom end of the pipe fitting body is fixedly connected with a lower connecting pipe. The left side of the front end of the lower connecting pipe is fixedly connected with an air outlet pipe in a penetrating mode, the inner wall of the air outlet pipe is communicated with the inner wall of the lower connecting pipe, the top end of the pipe fitting body is fixedly connected with an air inlet pipe, and a noise reduction groove is formed in the position, close to the left side of the air outlet pipe, of the inner wall of the front end of the lower connecting pipe. According to the utility model, by arranging the noise reduction groove, leftward gas entering the lower connecting pipe is blocked, so that the gas inlet resistance can be reduced, further, certain gas inlet noise is reduced, and certain gas inlet smoothness and gas flow convolution are improved; and noise generated by collision between a certain amount of gas and the inner wall of the pipe fitting when the gas is transmitted in the pipe fitting body can be absorbed by arranging the sound absorption folding sleeve, and the noise reduction effect is further improved.

The utility model relates to an air inlet cover structure, in particular to an air inlet cover of an automobile air conditioner, and belongs to the technical field of automobile parts. The air inlet is enclosed by ABCDA, and the air outlet is enclosed by EFGHE; the air inlet is flared, the section of the air inlet is wide at the upper end and narrow at the lower end, and the air outlet is located in the middle of the air inlet cover; a water collecting tank is arranged at the bottom in the air inlet cover, a water outlet is formed in the limit low position of the water collecting tank and extends outwards to form a water outlet pipe extending to the outer side of the air inlet cover, and a duckbilled water outlet pipe is assembled on the water outlet pipe on the water outlet. According to the air inlet cover, vortex formed by entering air in the air inlet cover is reduced, and air inlet noise is lowered; the duckbilled drainage pipe can prevent rainwater from entering the air conditioner front steaming system to cause faults, and can also prevent hot air and waste gas from entering a cab through an air duct of the air conditioner front steaming system. Therefore, the air inlet cover is reasonable in structure and smoother in waste gas isolation and water drainage, and improves the working performance of the automobile air conditioner to the maximum extent.

The invention relates to the technical field of air compressors, in particular to a noise reduction air compressor which comprises an air tank and a motor pump head and further comprises a silencer, the silencer comprises a straight pipe, a spiral column, a cross-shaped pipe, a T-shaped pipe, filter cotton and a flow meter, the straight pipe is arranged on one side of the outer portion of the air tank, one end of the cross-shaped pipe is connected with an air inlet part of the straight pipe in an inserted mode, and the other end of the cross-shaped pipe is connected with an air outlet part of the T-shaped pipe in an inserted mode. The filter cotton is arranged in the T-shaped pipe, the spiral column is arranged in the straight pipe, the flowmeter is connected with the exhaust portion of the straight pipe in an inserted mode, the exhaust portion of the straight pipe is connected with the air inlet end of the motor pump head through a second pipeline, and the straight pipe is provided with an air blowing port on the outer side of the flowmeter and the spiral column. According to the air compressor, the silencing device is installed at the air inlet end of the motor pump head, air inlet noise of the motor pump head can be reduced, an operator cannot be affected even if the air compressor runs for a long time, and the air compressor has high practicability.

A novel fan system for an integrated stove comprises a fan box and an air intake body arranged in the air intake passage of the integrated stove, wherein the fan box is located at the back of the integrated stove; the air intake body is located inside the wind box, and comprises a front device, an impeller, a motor, an air outlet pipe, and an oil return pipe; the front device is composed of six surfaces A, B, C, D, E, and F, and comprises an air intake mesh and a plurality of heat exchange pipes; the impeller is located below the front device, one side of which is fixed to the inner wall of the air intake body, and the other side is connected to the motor; the air outlet pipe is located at the end of the air intake direction of the body; and an oil return pipe is provided at the side end of the air intake body. The present invention provides a novel fan system for an integrated stove that reduces grease accumulation, air intake noise, and energy waste in the integrated stove.

The utility model provides an air inlet channel assembly and a vehicle, and relates to the technical field of vehicle accessories. The air inlet channel assembly comprises an air channel body and a resonance piece, the air channel body is provided with an avoiding area, the resonance piece is located in the avoiding area and connected with the air channel body, an airflow channel is formed in the air channel body, and the resonance piece is provided with a resonant cavity communicated with the airflow channel. Therefore, when pressure waves formed by the engine of the vehicle due to opening and closing of an air valve are further transmitted into the air flow channel of the air passage body and circulate in the air flow channel, air in the resonant cavity resonates with the pressure waves at a specific vibration frequency under the action of the pressure waves, energy of the pressure waves is consumed, at least part of the pressure waves are counteracted, and the air flow channel is formed. Therefore, the air inlet noise of the engine is reduced, and the noise reduction effect of the air inlet system is improved.

The utility model discloses a small-sized pneumatic water-milling belt sander for polishing narrow parts, which comprises a shell, an inlet end of the shell is fixedly connected with an air inlet joint, an inlet end of the air inlet joint is communicated with an external air source, a silencer is fixedly connected between the outer side wall of the air inlet joint and the inner side wall of the shell, and the air inlet joint is communicated with the silencer. The outlet end of the air inlet connector is fixedly communicated with an air filter, an air flow adjusting valve is fixedly connected to the inner side wall of the shell, the inlet end of the air flow adjusting valve is communicated with the outlet end of the air filter, an opening and closing pin is slidably connected into the air flow adjusting valve, one end of the opening and closing pin extends out of the shell, and a trigger is hinged to the outer side wall of the shell and abuts against the opening and closing pin. A pneumatic motor is fixedly connected into the shell, and the inlet end of the pneumatic motor communicates with the outlet end of the air flow adjusting valve. According to the belt sander, a series of technical problems that a traditional belt sander is prone to vibration at a high rotating speed, noise is too large, and operation is unstable are effectively solved, and the polishing quality and the working efficiency are remarkably improved.

The application discloses a double-layer noise reduction air guide ring, which comprises an inner air guide ring layer and an outer air guide ring layer. The inner air guide ring layer comprises a circular ring segment, a mounting panel, an inlet flow guide segment and an outlet diffuser segment. The inlet flow guide segment and the outlet diffuser segment are fixedly connected with the two ends of the circular ring segment respectively. The inlet flow guide segment is in a circular arc shape. The mounting panel is fixedly connected with the side of the inlet flow guide segment, which is away from the circular ring segment. The outer air guide ring layer comprises a flat segment, a circular arc segment and a partition plate. The end of the circular arc segment, which is close to the inner air guide ring layer, is provided with an outer layer outlet end. The end of the circular arc segment, which is away from the inner air guide ring layer, is provided with an outer layer inlet end. The mounting panel and the flat segment are provided with a connecting structure. The partition plate is provided with a plurality of partition plates. The resonant cavities between the adjacent partition plates are different in size. The application further discloses a fan comprising the double-layer noise reduction air guide ring. The application has the advantages of high fan efficiency and low air inlet noise.