CN113417841A

CN113417841A - Low-noise air compressor

Info

Publication number: CN113417841A
Application number: CN202110853535.3A
Authority: CN
Inventors: 陈振武; 吴刚; 陈敬国
Original assignee: Anjiu Medical Devices Suzhou Co ltd
Current assignee: Anjiu Medical Devices Suzhou Co ltd
Priority date: 2021-07-28
Filing date: 2021-07-28
Publication date: 2021-09-21

Abstract

The invention relates to the field of air compressors, in particular to a low-noise air compressor, which comprises an upper cover, a compressor main body and a lower cover, the upper cover is arranged on the compressor main body, the lower cover is arranged at the lower end of the compressor main body, the upper cover is provided with an air inlet, an air outlet channel and an air outlet, the lower cover is internally provided with an air inlet channel, the air inlet extends into the upper cover, and is connected with the air inlet channel, the air outlet extends into the upper cover and is communicated with the air outlet channel, the compressor body comprises a compressor, a cavity and a sealing gasket, the sealing gasket is positioned between the cavity and the lower cover, the compressor is positioned in the cavity and comprises a compressor coil, an air blowing seat, a rocker arm, a diaphragm and a rotating shaft, the compressor coil is located at one end in the cavity, and the air blowing seat and the compressor coil are arranged in parallel. The low-noise air compressor disclosed by the invention has the advantages of low noise and long service life during working.

Description

Low-noise air compressor

Technical Field

The invention relates to the field of air compressors, in particular to a low-noise air compressor.

Background

Rocker arm type air compressors on the market at present can be roughly divided into two types, one type is that rocker arms on two sides respectively use an air blowing seat, and the second type is that rocker arms on two sides share the air blowing seat. With the development of the injection molding industry, the second rocker arm type compressor becomes the mainstream design, and the volume minimization can be realized. However, whatever the design, such compressors still face noise and life challenges.

The noise problem is mainly caused by electromagnetic noise, mechanical noise, fluid noise, and the like, as analyzed from the viewpoint of the noise source. The compressor is generally a mains supply input and has low power, and the electromagnetic noise occupation ratio and the optimization space are small.

Mechanical noise is mainly unbalanced force of the moving rocker arm assembly and is caused by mutual collision or collision of other parts, and although the compressor in the market is designed to counteract transverse vibration by making two rocker arms move in opposite directions based on the mechanical noise, the magnets are positioned and controlled at the front ends of the rocker arms so as to ensure that the two rocker arms can synchronously move in opposite directions. However, such unbalanced forces cannot be solved in actual production, and the main reason is that the rotating shafts of the diaphragm and the rocker arm are made of soft rubber, and the mechanical strength of the rotating shafts is reduced along with the increase of the temperature and the service time during use, so that the rocker arm deviates from the initial design position to ensure synchronous opposite movement, and even mutual collision of magnets on the rocker arm or collision of the magnets on other parts can occur.

The fluid noise mainly includes intake noise and discharge noise, and the compressors on the market do not have much improvement measures for the intake fluid.

In addition, the design that the closed rocker arm and the soft rubber rotating shaft are embraced on the air blowing seat has appeared in the market at present, and although the wear-resistant soft rubber material can be selected to prevent the rocker arm from jumping out, the problem of the dislocation of the rocker arm caused by the up-and-down jumping of the rotating shaft after long-term use cannot be solved.

Disclosure of Invention

In order to solve the defects in the prior art, the invention provides the low-noise air compressor, and the compressor is provided with the hourglass-shaped rotating shaft hole and the hourglass-shaped rotating shaft, so that the rotating shaft and the rotating shaft hole are prevented from being shifted in position when the compressor works, and the noise of the compressor is increased; through setting up the connecting hole, avoided the rocking arm from the problem of play in the pivot.

The technical scheme of the invention is as follows:

the utility model provides a low noise air compressor, includes upper cover, compressor main part and lower cover, be equipped with in the compressor main part the upper cover, compressor main part lower extreme is equipped with the lower cover, on cover and be equipped with air inlet, air outlet channel and gas outlet, be equipped with inlet channel in the lower cover, the air inlet stretches into in the upper cover, and with inlet channel connects, the gas outlet stretches into behind the upper cover with air outlet channel communicates.

Preferably, the compressor body includes a compressor, a cavity, and a sealing gasket, the sealing gasket being located between the cavity and the lower cover, the compressor being located within the cavity.

Preferably, the compressor includes compressor coil, air-blowing seat, rocking arm, diaphragm and pivot, the compressor coil is located one end in the cavity, the air-blowing seat with the compressor coil sets up side by side, air-blowing seat both sides respectively are equipped with a diaphragm, the air-blowing seat is kept away from the one end of compressor coil is equipped with the pivot hole, the downthehole pivot that is equipped with, the pivot with the rocking arm is connected.

Preferably, the upper end of the air blowing seat is provided with an air outlet, the lower end of the air blowing seat is provided with an air inlet, the two ends of the air blowing seat are respectively provided with an air blowing cavity, the air inlet is communicated with the air blowing cavity, the air blowing cavity is communicated with the air outlet, the tail end of the air outlet is provided with an air outlet valve plate, and the tail end of the air inlet is provided with the air inlet valve plate.

Preferably, a plurality of choke plates are arranged in the air inlet channel and the air outlet channel.

Preferably, the rotating shaft is hourglass-shaped, and a rocker arm fixing groove is formed in the middle of the rotating shaft.

Preferably, one end of the rocker arm is provided with the magnet vibrator, the other end of the rocker arm is provided with a connecting hole, and the connecting hole is sleeved in the rocker arm fixing groove.

Preferably, a well body air outlet structure is arranged at the upper end of the cavity and comprises a second air hole and a third air hole, and the second air hole and the third air hole are identical in structure.

Preferably, the second air hole comprises a plurality of air outlet small holes.

The invention achieves the following beneficial effects:

1. the hourglass-shaped rotating shaft hole and the hourglass-shaped rotating shaft are arranged, so that the condition that the rotating shaft and the rotating shaft hole are displaced when the compressor works, the rocker arm is asymmetric, and the noise of the whole compressor during working is increased;

2. by arranging the connecting holes, the problem that the rocker arm escapes from the rotating shaft is avoided, and the service life of the whole equipment is prolonged;

3. by arranging the well body air outlet structure, the disturbance condition of air flow is reduced, the noise of the whole compressor during working is reduced, and the performance of a product is improved;

4. the air baffle plates are arranged in the upper cover and the lower cover, so that the purpose of reducing noise of the discharged air is achieved, and the noise of the whole compressor during working is integrally reduced.

Drawings

Fig. 1 is a top plan view of an exploded schematic of the overall structure of the present invention.

Fig. 2 is a bottom view of the overall structure of the present invention in an exploded view.

Fig. 3 is a schematic view of the structure of the compressor.

Fig. 4 is a schematic structural view of the air blowing base.

Fig. 5 is a schematic structural view of the upper cover.

Fig. 6 is a cross-sectional view of fig. 5.

Fig. 7 is a cross-sectional view of fig. 5.

Fig. 8 is a schematic view of the structure of the rocker arm.

Fig. 9 shows the flow direction of gas in the apparatus when gas is introduced.

Fig. 10 shows the flow of gas in the apparatus when it is outgassed.

In the figure, 1, an upper cover; 2. a compressor main body; 3. a lower cover; 11. an air inlet; 12. an air outlet channel; 14. an air outlet; 21. a compressor; 22. a cavity; 23. sealing gaskets; 32. an air intake passage; 131. a choke plate; 211. a compressor coil; 212. an air blowing base; 213. a rocker arm; 214. a rotating shaft; 215. a diaphragm; 222. a second air hole; 223. a third air hole; 225. a fifth air hole; 2121. a rotating shaft hole; 2122. an air outlet; 2123. an air inlet; 2124. an air blowing cavity; 2125. an air outlet valve plate; 2126. an air inlet valve plate; 2131. a magnet vibrator; 2132. connecting holes; 2141. and a rocker arm fixing groove.

Detailed Description

To facilitate an understanding of the present invention by those skilled in the art, specific embodiments thereof are described below with reference to the accompanying drawings.

As shown in fig. 1 to 10, the present invention provides a low noise air compressor, which includes an upper cover 1, a compressor main body 2 and a lower cover 3, wherein the upper cover 1 is disposed on the compressor main body 2, the lower cover 3 is disposed at the lower end of the compressor main body 2, the compressor main body 2 is enclosed by the upper cover 1 and the lower cover 3 to form a sealed environment, so as to ensure normal air supply operation of the compressor 21, an air inlet 11, an air outlet channel 12 and an air outlet 14 are disposed on the upper cover 1, an air inlet channel 32 is disposed in the lower cover 3, the air inlet 11 extends into the upper cover 1 and is connected to the air inlet channel 32, air can enter a chamber formed by the upper cover 1 and the lower cover 3 through the air inlet 11 and the air inlet channel 32, the air outlet 14 extends into the upper cover 1 and then is communicated with the air outlet channel 12, the compressed gas flows out through the gas outlet channel 12 and the gas outlet 14. Because the air passages with the mesh grid structures are arranged in the air inlet passage 32 and the air outlet passage 12, the pulse pneumatic noise can be reduced step by step, the reverberation is avoided, and the noise of the compressor 21 during working is effectively reduced. When the device works, the compressor 21 is powered on, the compressor coil 211 is magnetized to drive the magnet vibrator 2131 to vibrate, if the rocker arm 213 drives the diaphragm 215 to expand, air passes through the air inlet 11, the air inlet channel 32 and the air inlet 2123 and enters the diaphragm 215, then the rocker arm 213 drives the diaphragm 215 to compress, and the gas in the diaphragm 215 flows out of the device through the air outlet hole 2122, the air outlet channel 12 and the air outlet 14.

In this embodiment, the compressor body 2 includes a compressor 21, a cavity 22 and a sealing gasket 23, the sealing gasket 23 is located between the cavity 22 and the lower cover 3, and the compressor 21 is located in the cavity 22. By providing the chamber, the upper cover 1 and the lower cover 3 can be engaged to form a sealed environment for the operation of the compressor 21. A sealing ring is provided to ensure the sealing between the cavity 22 and the lower cover 3.

In this embodiment, the compressor 21 includes the compressor coil 211, the air blowing seat 212, the rocker arm 213, the diaphragm 215 and the rotating shaft 214, the compressor coil 211 is located at one end of the cavity 22, two sides of the air blowing seat 212 are respectively provided with one diaphragm 215, one end of the air blowing seat 212, which is far away from the compressor coil 211, is provided with a rotating shaft hole 2121, the air blowing seat 212 and the compressor coil 211 are arranged in parallel, the rotating shaft 214 is arranged in the rotating shaft hole 2121, and the rotating shaft 214 is connected with the rocker arm 213. After the power is turned on, the compressor coil 211 has certain magnetism, so as to drive the rocker arm 213 to rotate around the rotating shaft 214, and the moving rocker arm 213 can drive the diaphragm 215 to expand or compress, so that air can enter or flow out of the air blowing seat 212.

In this embodiment, the upper end of the air blowing base 212 is provided with an air outlet hole 2122, the lower end thereof is provided with an air inlet hole 2123, the two ends thereof are respectively provided with an air blowing cavity 2124, the air inlet hole 2123 is communicated with the air blowing cavity 2124, the air blowing cavity 2124 is communicated with the air outlet hole 2122, the tail end of the air outlet hole 2122 is provided with an air outlet valve plate 2125, and the tail end of the air inlet hole 2123 is provided with the air inlet valve plate 2126. When the diaphragm 215 expands, a negative pressure is formed in the diaphragm 215, the air outlet valve plate 2125 is pushed to block the air outlet hole 2122, air can pass through the air inlet hole 2123 and push away the air inlet valve plate 2126 to enter the air blowing cavity 2124, then the rocker arm 213 compresses the diaphragm 215, the pressure in the diaphragm 215 increases, at this time, under the action of air pressure, air pushes the air inlet valve plate 2126 to block the air inlet hole 2123, and the air can pass through the air outlet hole 2122, flow into the air outlet channel 12, and then flow out of the compressor 21 through the air outlet hole 2122.

In this embodiment, a plurality of choke plates 131 are disposed in the air inlet channel 32 and the air outlet channel 12, and a plurality of choke plates 131 form a grid structure, which can reduce aerodynamic noise of the air flow, avoid reverberation of the compressor 21 during operation, and reduce the operation noise of the entire compressor 21.

In this embodiment, the rotating shaft 214 has an hourglass shape, and a rocker fixing groove 2141 is formed in the middle. Through setting up hourglass shape pivot 214, can be right the upper and lower position of rocking arm 213 carries on spacingly, avoids pivot 214 the dislocation problem of the upper and lower drunkenness at the during operation, guarantees rocking arm 213 can move in opposite directions, has reduced the noise of compressor 21 during operation. Meanwhile, the membrane 215 can be prevented from being torn due to the dislocation of the rocker arm 213, and the service life of the compressor 21 is prolonged.

In this embodiment, the magnet vibrator 2131 is disposed at one end of the swing arm 213, and a connection hole 2132 is disposed at the other end of the swing arm 213, and the connection hole 2132 is sleeved in the swing arm fixing groove 2141. After the connecting hole 2132 is provided, the rocker arm 213 can be fixed to the rotating shaft 214, and by providing the magnet vibrator 2131, after the compressor coil 211 is energized, the magnet vibrator 2131 can drive the rocker arm 213 to move back and forth, so as to expand or contract the diaphragm 215.

In this embodiment, a well air outlet structure is disposed at the upper end of the cavity 22, the well air outlet structure includes a second air hole 222 and a third air hole 223, and the second air hole 222 and the third air hole 223 have the same structure. The second air holes 222 include a plurality of small air outlet holes, the second air holes 222 and the third air holes 223 are respectively communicated with the air outlet channel 12, and the air flowing out from the air outlet holes 2122 flows out through the second air holes 222 and the third air holes 223. The small air outlet holes can reduce the turbulent aerodynamic noise at the position before and after air compression and reduce the working noise of the compressor 21.

In this embodiment, the cavity 22 is further provided with a fifth air hole 225 communicated with the air inlet 2123, and the air entering from the air inlet 11 enters the cavity 22 through the fifth air hole 225. The following is specific experimental data, and the performance of the product is illustrated by the corresponding experimental data.

(1) And (5) testing the noise level.

I entrust Jiangsu province medical instrument inspection institute Suzhou province and imitate the actual load condition of compressor, and then detect the operating noise of whole compressor during operation, the result is as follows:

Compressor	number of test stations	Average value of noise
			Conventional compressor	5	41 decibel
The invention relates to a compressor	5	30 decibel

It can be seen that the average value of the noise is 41 db when the conventional compressor is operated, whereas the noise is 30 db when the compressor of the present invention is operated. It can be seen that the compressor of the present invention operates normally with significantly lower noise levels than conventional compressors.

After that, in the case where the compressor structure is not changed, the noise of the compressor provided with the choke plate 131 and without the choke plate 131 is compared.

Compressor	Number of tests	Average value of noise
			With air-blocking plates	5 stands	33 decibel
Without air baffle	5 stands	38 decibel

It can be seen that, in the present invention, the noise generated when the compressor operates can be significantly reduced by providing the choke plate 131. The reason is that the conventional compressor without the choke plate 131 generates reverberation inside the compressor due to the compressed air being a pulse flow. In the invention, the choke plate 131 is arranged in the compressor, and the grid structure is adopted, so that the pulse pneumatic noise is reduced step by step, the reverberation phenomenon of the compressor during working is avoided, and the noise value of the compressor can be obviously reduced.

(2) And (5) carrying out a life test.

In a laboratory, a conventional compressor and a compressor of the present invention were subjected to a life test, and the results were as follows:

Compressor	number of tests	Time of measurement	Test results
				Conventional compressor	30 tables	60 days	9 failure
Compressor with new design	80 stands	282 days	Without any defective products and potential failure points

It can be seen that in the life test, under the same conditions, the engine failure condition occurs in the traditional compressor test for 60 days, while the engine in the application can still normally operate after 282 days of operation, thus fully showing the performance of the compressor in the invention.

This is because the rotating shaft 214 is designed to have an hourglass shape, a swing arm fixing groove 2141 is formed in the middle, the magnet vibrator 2131 is formed at one end of the swing arm 213, a connection hole 2132 is formed at the other end, and the connection hole 2132 is fitted into the swing arm fixing groove 2141. At this time, the direction of the rocker arm 213 during vibration is limited, and the axial movement of the rocker arm 213 on the rotating shaft 214 is avoided, so that the problem of unbalanced vibration force of the compressor rocker arm is avoided.

(3) And (3) carrying out noise reduction performance experiment on the well gas outlet structure.

In the laboratory, will set up the well and give vent to anger the structure and do not set up the well and give vent to anger compressor 2 of structure and carry out the noise experiment, the result as follows:

compressionMachine for working	Number of tests	Average noise value
			Gas outlet structure without well body	5 stands	38 decibel
With well body structure of giving vent to anger	5 stands	36 decibel

It can be seen that under the same design, the noise of the compressor with the well air outlet structure is designed to be 36 decibels, but the noise value of the compressor without the well structure design is 38 decibels by adopting the traditional through hole type compressor, and the noise value of the compressor during working can be obviously reduced.

In addition, the connecting position of the rotating shaft 214 and the air blowing seat 212 adopts an hourglass structure, so that the problem that the rotating shaft 214 moves up and down after long-time running is solved, the problem that the diaphragm 215 is torn due to the movement of the rotating shaft 214 or the rocker arm 213 is avoided, and the service life of the engine is prolonged.

The invention achieves the following beneficial effects:

1. by arranging the hourglass-shaped rotating shaft hole 2121 and the hourglass-shaped rotating shaft 214, the rotating shaft 214 and the rotating shaft hole 2121 are prevented from being displaced when the compressor works, so that the rocker arm 213 is asymmetric, and the noise generated when the whole compressor 2 works is increased;

2. by arranging the connecting hole 2132, the problem that the rocker arm 213 runs out of the rotating shaft 214 is avoided, and the service life of the whole device is prolonged;

3. by arranging the well body air outlet structure, the disturbance condition of air flow is reduced, the noise of the whole compressor 2 during working is reduced, and the performance of a product is improved;

4. the purpose of reducing noise of the air flowing out is realized by arranging the air baffle plates 131 in the upper cover 1 and the lower cover 3, and the noise of the whole compressor during working is reduced integrally.

The above-described embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A low noise air compressor characterized in that: including upper cover (1), compressor main part (2) and lower cover (3), be equipped with on compressor main part (2) upper cover (1), compressor main part (2) lower extreme is equipped with lower cover (3), be equipped with air inlet (11), air outlet channel (12) and gas outlet (14) on upper cover (1), be equipped with inlet channel (32) in lower cover (3), air inlet (11) stretch into in upper cover (1), and with inlet channel (32) connect, gas outlet (14) stretch into behind upper cover (1) with air outlet channel (12) intercommunication.

2. A low noise air compressor as defined in claim 1, wherein: the compressor body (2) comprises a compressor (21), a cavity (22) and a sealing gasket (23), wherein the sealing gasket (23) is positioned between the cavity (22) and the lower cover (3), and the compressor (21) is positioned in the cavity (22).

3. A low noise air compressor according to claim 2, wherein: compressor (2) include compressor coil (211), air-blowing seat (212), rocking arm (213), diaphragm (215) and pivot (214), compressor coil (211) are located one end in cavity (22), air-blowing seat (212) with compressor coil (211) set up side by side, air-blowing seat (212) both sides respectively are equipped with one diaphragm (215), air-blowing seat (212) are kept away from the one end of compressor coil (211) is equipped with pivot hole (2121), be equipped with in pivot hole (2121) pivot (214), pivot (214) with rocking arm (213) are connected.

4. A low noise air compressor according to claim 3, wherein: the air blowing device is characterized in that an air outlet hole (2122) is formed in the upper end of the air blowing seat (212), an air inlet hole (2123) is formed in the lower end of the air blowing seat, air blowing cavities (2124) are formed in the two ends of the air blowing seat respectively, the air inlet hole (2123) is communicated with the air blowing cavity (2124), the air blowing cavity (2124) is communicated with the air outlet hole (2122), an air outlet valve plate (2125) is arranged at the tail end of the air outlet hole (2122), and an air inlet valve plate (2126) is arranged at the tail end of the air inlet hole (2123).

5. A low noise air compressor as defined in claim 1, wherein: a plurality of choke plates (131) are arranged in the air inlet channel (32) and the air outlet channel (12).

6. A low noise air compressor according to claim 3, wherein: the rotating shaft (214) is hourglass-shaped, and a rocker arm fixing groove (2141) is formed in the middle of the rotating shaft.

7. A low noise air compressor according to claim 6, wherein: one end of the rocker arm (213) is provided with a magnet vibrator (2131), the other end of the rocker arm is provided with a connecting hole (2132), and the connecting hole (2132) is sleeved in the rocker arm fixing groove (2141).

8. A low noise air compressor according to claim 4, wherein: the upper end of the cavity (22) is provided with a well air outlet structure, the well air outlet structure comprises a second air hole (222) and a third air hole (223), and the second air hole (222) and the third air hole (223) are identical in structure.

9. A low noise air compressor as defined in claim 8, wherein: the second air holes (222) comprise a plurality of small air outlet holes.