KR200150835Y1 - Rotary compressor - Google Patents

Abstract

The present invention relates to a rotary compressor, the purpose of which is to efficiently cool the stator and the rotor by installing a discharge guide tube for guiding the refrigerant compressed to high temperature and high pressure to the inside of the sealed container.

In the rotary compressor according to the present invention, the inlet end 410 is in communication with the interior of the muffler 350 and the outlet end 420 is provided with a discharge guide tube 400 in communication with the interior of the sealed container 100, oil is The compressed refrigerant mixed and discharged into the muffler 350 is cooled to some extent while passing through the discharge guide tube 400, and then discharged into the sealed container 100 again. Therefore, the oil mixed in the compressed refrigerant is also cooled, thereby improving its cooling efficiency and overall reliability and mechanical performance of the compressor.

Description

Rotary compressor

The present invention relates to a rotary compressor mounted on an air conditioner, and more particularly, to a muffler that shields discharge noise and discharges a refrigerant compressed at a high temperature and high pressure into an airtight container.

In general, a rotary compressor functions to compress the refrigerant to a high temperature and high pressure in a refrigerating cycle such as an air conditioner in which a compression, condensation, expansion, and evaporation process is continuously performed using a refrigerant as a medium, and serves to discharge the refrigerant to the outside.

As shown in FIG. 1, the conventional rotary compressor having such a function includes a compression unit 30 and a compression unit for sucking and compressing a refrigerant into an airtight container 10 in which oil is stored so as to lubricate and cool the actuator at the bottom. The drive unit 20 for driving the 30 is configured, and the refrigerant inlet pipe 11 and the refrigerant discharge pipe 12 for guiding the introduction and discharge of the refrigerant are installed in communication with the inside of the sealed container 10. have. Reference numeral 13 is an accumulator.

The compression unit 30 includes a cylinder 31 having both sides opened to form a compression chamber 31a therein and a roller 32 provided in the compression chamber 31a to rotate and rotate and suck and compress the refrigerant. One side of the cylinder 31 is formed with a refrigerant inlet 31b to which the refrigerant inlet pipe 11 is coupled, so that the refrigerant in the accumulator 13 passes through the refrigerant inlet pipe 11 and the refrigerant inlet 31b. It flows into the compression chamber 31a.

The driving unit 20 is combined with the roller 32 to form a rotation shaft 23, the rotor 22 is formed in the eccentric portion 24 integrally formed so as to rotate the eccentric, the rotor 22 and the magnetic field to the rotor ( It consists of the stator 21 which rotates 22 high speed. The lower end portion of the rotating shaft 23 is provided with a hollow portion 25 and an oil discharge hole 26 for pumping oil, and the tip portion thereof is accommodated in the oil, thereby pumping and lubricating the oil to each sliding portion during rotation.

And the upper bearing 33 and the lower bearing 34 which form the compression chamber 31a and support the rotating shaft 23 rotatably are comprised with the cylinder 31 interposed, and the inside of the cylinder 31 A vane (not shown) is provided on the side surface to contact the outer circumferential surface of the roller 32 to move forward and backward so that the compression chamber 31 is divided into a suction chamber and a discharge chamber. The vane groove 31c is inclined outwardly so as to smoothly guide the refrigerant discharge to the discharge port 33a which will be described later on the cylinder 31 side of the compression chamber 31a facing the vane (not shown). ), A resonator 31d is formed in association with the half moon groove 31c to attenuate the noise caused by the re-expansion of the residual refrigerant.

On the other hand, the upper bearing 33 is formed with a discharge port 33a which is drilled vertically upward in a portion corresponding to the half moon groove 31c and communicates with the compression chamber 31a and the inside of the muffler 35 which will be described later. The discharge valve 33b which opens and closes the discharge port 33a is provided on the upper side. The upper part of the upper bearing 33 is provided with a muffler 35 for shielding the noise caused by the discharge of the compressed refrigerant, which forms a separate partitioned space on top of the upper bearing 33, where the compressed refrigerant is It is discharged and noise is shielded. In addition, a discharge hole 35a is formed in the upper surface of the muffler 35 so that the compressed refrigerant is discharged back into the inner space of the sealed container 10.

In the rotary compressor configured as described above, the rotating shaft 23 rotates at high speed due to the interaction of the stator 21 and the rotor 22 as the power is applied, and the roller 32 together with the eccentric portion 24 is a cylinder. In the compression chamber 31a of 31, an eccentric rotational motion and a rotating motion are performed. Accordingly, when the refrigerant flowing into the compression chamber 31a through the refrigerant inlet pipe 11 and the refrigerant inlet 31b reaches a predetermined pressure, the discharge valve 33b is opened, and the refrigerant compressed at high temperature and high pressure is a half moon groove. The discharge noise is shielded by being discharged into the muffler 35 through the 31c and the discharge port 33a. Subsequently, the compressed refrigerant is discharged into the sealed container 10 through the discharge hole 35a and supplied to the refrigeration cycle through the refrigerant discharge pipe 12.

At this time, the oil is also pumped together by the rotation of the rotary shaft 23 to lubricate and cool each sliding part. A portion of the pumped oil is compressed to high temperature and high pressure together with the refrigerant and is sealed through the discharge hole 35a. Cooling the drive unit 20 is discharged to generate heat. That is, the oil mixed into the refrigerant compressed at a high temperature and high pressure and scattered through the discharge hole 35a of the muffler 35 adheres to the surface while rising upward through the air gap between the stator 21 and the rotor 22. Condensation to cool them.

However, since such flying oil is high temperature together with the compressed refrigerant, there is a limit to cooling the driving unit 20. Since the stator 21 and the rotor 22 of the drive unit 20 generate considerable heat during the operation of the compressor, they must be continuously cooled. However, since the scattering oil for this is also heated, the cooling efficiency thereof is lowered. As a result, the stator 21 and the rotor 22 are heated to lower their mechanical efficiency and the overall compression efficiency of the compressor. In addition, most of the oil scattered at high temperature is discharged into the refrigeration cycle through the refrigerant discharge pipe 12 together with the compressed refrigerant, thereby lowering the overall reliability of the compressor.

The present invention is to solve this problem, the purpose of the present invention is the inlet end is in communication with the interior of the muffler and the outlet end is installed by the discharge guide tube which is in communication with the inside again to the outside of the sealed container, the oil is mixed Compressed refrigerant is cooled to some extent through the discharge guide tube and discharged into the sealed container to improve the reliability and mechanical performance of the compressor.

1 is a cross-sectional view showing the overall configuration of a conventional rotary compressor.

2 is a cross-sectional view showing the overall configuration of a rotary compressor according to the present invention.

* Explanation of symbols for main parts of the drawings

100: sealed container 110: refrigerant inlet pipe

120: refrigerant discharge pipe 200: drive unit

210: stator 220: rotor

230: shaft 240: eccentric portion

300: compression section 310: cylinder

320: roller 330: upper bearing

340: lower bearing 350: muffler

400: discharge guide tube 410: inlet end

420: exit stage

The present invention for achieving this object, the oil is stored in the bottom and the refrigerant inlet pipe and the refrigerant discharge pipe provided with a refrigerant inlet pipe for guiding the outflow of the refrigerant, built in a sealed container and compresses the refrigerant introduced through the refrigerant inlet pipe In the rotary compressor having a compression unit for discharging, the muffler discharged into the space formed inside the compressed refrigerant to shield the discharge noise, the muffler comprises an inlet end communicating with the interior of the muffler and an outlet end formed to be in communication with the interior of the sealed container And a discharge guide tube.

Hereinafter, one preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings. 2 is a cross-sectional view showing the overall configuration of a rotary compressor according to the present invention.

The rotary compressor according to the present invention, the refrigerant inlet pipe 110 and the refrigerant guiding the introduction and discharge of the refrigerant in conjunction with the refrigeration cycle in the sealed container 100 is sealed to the outside and the oil is stored as shown in this The discharge pipe 120 is provided. Both ends of the refrigerant inlet pipe 110 are coupled to the accumulator 130 and the refrigerant inlet 312 at the side of the cylinder 310 to be described later to guide the refrigerant inlet. In addition, the sealed container 100 includes a driving unit 200 that receives power and generates power, and a compression unit 300 that sucks and discharges the refrigerant by driving the power received from the driving unit 200.

The driving unit 200 is installed so that an air gap is formed inside the stator 210 and the stator 210 that form a magnetic field by receiving power, and are pressed into the rotor 220 and the rotor 220 that rotate at high speed. Rotating consists of a rotary shaft 230 and the like provided with an eccentric portion 240 in the lower portion. In addition, a hollow portion 231 and an oil discharge hole 232 are formed at the lower end of the rotary shaft 230 for lubrication and cooling of each sliding portion, and a tip portion thereof is accommodated in oil.

Compression unit 300 that operates by the power of the driving unit 200 is coupled to the eccentric rotation unit 240 to form the compression chamber 311 so that the roller 320 is rotated and rotated is installed, both sides are opened Cylinder 310, the upper and lower bearings (330, 340) rotatably supporting the rotary shaft 230, the end of the rotary shaft 230 supported by the lower bearing 340 of the lower cylinder 310 is in oil Are accepted. A vane (not shown) coupled with the outer surface of the roller 320 to divide the compression chamber 311 into the suction chamber and the discharge chamber is provided, and the vane (311) of the compression chamber 311 facing the coolant suction port 312 around the vane is provided. Vandal groove 313 for guiding the refrigerant discharge is inclined outward on the cylinder 310, the resonator 314 is reduced in connection with the vandal groove 313.

On the other hand, the upper bearing 330 corresponding to the vertically upward of the vandal groove 313 is composed of a discharge port 331 and a discharge valve 332 for opening and closing it, the upper surface of the upper bearing 330 is fixed inside A muffler 350 is provided to shield the noise when the compressed refrigerant is discharged. And as a characteristic element of the present invention one end is in communication with the muffler 350, the other end is in communication with the interior of the sealed container 100 to discharge the compressed guide pipe 400 to guide the discharged into the sealed container (100) This is provided.

The discharge guide tube 400 is composed of an inlet end 410 communicated with the interior of the muffler 350 and an outlet end 420 communicated with the sealed container 100. The center of the discharge guide tube 400 is exposed to the outside of the sealed container 100, the outlet end 420 thereof is inserted from the outside of the sealed container 100 and communicated with the lower side of the drive unit 200 again. Accordingly, the compressed refrigerant discharged into the muffler 350 is introduced into the discharge guide tube 400 through the inlet end 410 and cooled to some extent by external air in the process of passing through the inlet end 410, and then sealed by the outlet end 420. It is discharged again to the lower side of the driving unit 200 in the container (100).

Next will be described the operation of the rotary compressor according to the present invention configured as described above. In the rotary compressor according to the present invention, when the power is applied, the rotor 220 and the rotating shaft 230 rotate at a high speed by interacting with the stator 210, and the roller 320 is compressed along with the eccentric portion 240 that is eccentrically rotated. Eccentric rotation and rotational movement in the room 311. Accordingly, the refrigerant flows into the compression chamber 311 through the refrigerant inlet pipe 110 and the refrigerant inlet 312, and is compressed at high temperature and high pressure. When the refrigerant reaches a predetermined pressure, the discharge valve 332 is opened to open the half moon groove 313. ) Is discharged into the space formed inside the muffler 350 through the discharge port 331 to reduce the discharge noise. In addition, the oil is pumped by the rotation of the rotating shaft 230 at a high speed, and some of the sliding parts are lubricated and cooled, and others are mixed in the refrigerant to be compressed.

Accordingly, the compressed refrigerant discharged into the muffler 350 is mixed with oil and discharged into the sealed container 100 through the discharge guide tube 400. The discharge guide tube 400 is a characteristic action of the present invention. As it passes, the oil cools, improving its cooling efficiency.

That is, the refrigerant compressed at high temperature and high pressure flows into the discharge guide tube 400 through the inlet end 410, and the discharge pressure decreases due to the change of the flow path in the process of passing through the inlet end 410, and is primarily cooled by external air. And discharged to the lower side of the driving unit 200 through the outlet end 420. At this time, the oil mixed in the compressed refrigerant is also cooled and discharged, which rises upward through the air gap between the stator 210 and the rotor 220 and adheres to the surfaces of the stator 210 and the rotor 220. It condenses and flows down as it cools.

Therefore, since the rotor 220 and the stator 210 of the driving unit 200 that generate heat during operation of the compressor are cooled by the primary cooled oil, the cooling efficiency is greatly improved, and their mechanical performance and compression efficiency are increased. . In addition, the amount of oil discharged to the refrigerant discharge pipe 120 is reduced to prevent the cooling capacity of the refrigeration cycle is reduced, and the cycle efficiency thereof is improved because the refrigerated cycle is supplied with the first cooled compressed refrigerant.

On the other hand, this technical idea is not limited to this, but not shown, it is a matter of course that the objective of the present invention can be achieved even if the outlet end of the refrigerant discharge pipe is connected to the inside of the sealed container above the drive unit.

As described in detail above, the rotary compressor according to the present invention is provided with a discharge guide tube in which the inlet end is in communication with the interior of the muffler and the outlet end is in communication with the inside of the sealed container, the oil is mixed with the compressed refrigerant discharged to the muffler Is cooled to some extent through the discharge guide tube and discharged back into the sealed container. Therefore, the oil mixed in the compressed refrigerant is also cooled, thereby improving its cooling efficiency and overall reliability and mechanical performance of the compressor.

Claims (2)

The oil is stored at the bottom and the refrigerant inlet pipe 110 and the refrigerant discharge pipe 120 for guiding the outflow of the refrigerant is provided in the sealed container 100, the sealed container 100 and the refrigerant inlet pipe 110 In the rotary compressor having a compression unit 300 for compressing and discharging the refrigerant introduced through the discharge, the muffler 350 is discharged to the space formed inside the compressed refrigerant to shield the discharge noise, the muffler (350) 350. A rotary compressor comprising an inlet end 410 communicating with the inside and an outlet end 420 formed in a curved pipe so as to communicate with the inside of the hermetic container 100. The rotary compressor of claim 1, wherein the center of the discharge guide tube (400) is exposed to the outside of the sealed container (100).