KR19990002396A - Rotary compressor - Google Patents

Abstract

The present invention relates to a rotary compressor.

The present invention prevents the oil discharged together with the gas refrigerant of high temperature and high pressure during the initial startup of the rotary compressor through the discharge pipe.

According to the present invention, a discharge tube and an inlet tube penetrate the upper and lower sides of a sealed container main body, and a motor having a plate corresponding to the lower side of the discharge tube is provided on the upper side of the rotor. In a rotary compressor having a cylinder directly below and rotating by the lubrication of oil stored in the main body and compressing the refrigerant recovered through the accumulator,

The plate is configured to be provided with an oil particle separation member which rotates integrally with the rotor and bounces and separates particles of oil mixed with the gas refrigerant compressed at high temperature and high pressure by the cylinder.

Description

Rotary compressor

The present invention relates to a rotary compressor, and more particularly, to a rotary compressor for preventing oil discharged together with a high temperature and high pressure gas refrigerant during initial startup of the rotary compressor.

In general, a rotary compressor (or hermetic rotary compressor) is used for compressing a gas gas into a liquid state of high temperature and high pressure in a refrigerating device.

In other words, the rotary compressor compresses the gaseous refrigerant enclosed therein at a high temperature and high pressure by the piston movement (or the rotational movement of the rotor) in the refrigerating device, and the compressed refrigerant is condensed in the condenser and passes through the capillary tube. It dives and takes the surrounding heat away from the evaporator and evaporates, turning it into a gas and recovering it with a rotary compressor.

The recovered gaseous refrigerant is compressed to high temperature and high pressure again by a compressor, and the above operation is repeated.

A general configuration of a rotary compressor having the above function is the same as that of FIG.

That is, the main body 100 having the closed container shape, which forms the overall appearance of the rotary compressor, is provided with a discharge pipe 101 communicating with the upper side thereof, and a suction pipe 102 is installed outside the lower side thereof.

The discharge tube 101 is connected to the condenser by a refrigerant pipe (not shown), and the suction tube 102 has one end portion protruding at a predetermined height inside the accumulator 200 and the other end cylinder described later. It is installed in communication with the cylinder chamber formed in.

The accumulator 200 is provided with a screen 210 formed of a mesh so that the liquid refrigerant and the gaseous refrigerant recovered through the evaporator described later are separated and passed therein.

On the other hand, the motor 110 is installed inside the main body 100.

The motor 110 includes a stator 113 fixed to an inner circumferential surface of the main body 100, a rotor 112 and a rotating shaft 111 disposed at a central portion thereof.

An upper side of the rotor 112 is provided with a blade piece 114 that functions as a balancer, and the upper side of the rotor 112 is fitted with a plate 115 into which the inlet side of the discharge tube 101 is fitted.

In addition, a cylinder 120 is disposed directly below the motor 110.

The cylinder 120 is coupled to the lower end of the rotation shaft 111 by upper and lower flanges 122 and 123, and a hollow cylinder chamber 121 communicating with the suction pipe 102 is formed therein.

In addition, the upper flange 122 is covered with a muffler 124 on the upper side, and the upper flange 122 and the muffler 124 is formed with an exhaust hole not shown in communication with the cylinder chamber 121.

On the other hand, an eccentric crank 131 is installed at the lower end of the rotating shaft 111 located inside the cylinder chamber 121, the roller 132 is fitted to the crank 131.

One side outer circumferential surface of the roller 132 is burned so that the vanes (not shown) are always in line contact, and the cylinder chamber 121 is divided into a suction chamber and a compression chamber.

Referring to the operation of the general rotary compressor configured as described above are as follows.

That is, when the rotary shaft 111 which has the motor 110 is rotated at a high speed, the roller 132 is the cylinder chamber 121 by the crank 131 eccentrically arranged at the lower end of the rotary shaft 111. Repeat the rotation and revolution within.

The roller 132 which repeats the rotation and the revolution has a function of sucking the gaseous refrigerant recovered through the accumulator 200 after the heat exchange in the evaporator, and again sucked into the cylinder chamber 121 and the sucked refrigerant. Simultaneously performs the function of compressing.

Accordingly, the gas refrigerant sucked into the cylinder chamber 121 through the accumulator 200 and the suction pipe 102 by the rotation and revolving of the roller 132 is, as shown by the one-point arrow of FIG. The roller 132 is compressed into a gas of high temperature and high pressure inside the cylinder chamber 121, and then ejected into the upper portion of the main body 100 through exhaust holes formed in the upper flange 122 and the muffler 124. After that, it is discharged through the discharge pipe 101 and circulated along the flow path of the refrigerating device.

In a general rotary compressor having such a configuration and operation, in particular, during initial start-up, a liquid refrigerant, which cannot be evaporated by the evaporator, flows into the inside of the main body 100 and floats oil O having a lower specific gravity than the liquid refrigerant. It is made up.

Therefore, the floated oil O is discharged through the discharge tube together with the gas refrigerant compressed to high temperature and high pressure, and circulates along each refrigerant tube forming a refrigeration cycle.

In this way, the oil O circulated together with the gaseous refrigerant along the refrigerant pipe connecting the refrigerating device has refrigerant and oil inside the evaporator (or indoor unit) having a pressure of 4 kg / cm 2 (saturation temperature 0 ° C.). (O) is separated and becomes a factor remaining on the inner wall surface of the evaporator composed of tubular body.

Therefore, the gas refrigerant cannot pass smoothly through the evaporator due to the oil remaining in the evaporator, thereby causing a problem that the efficiency of the evaporator, that is, the cooling efficiency is lowered.

In addition, the compressor should always have an appropriate amount of oil for lubrication. As described above, the compressor may not be sufficiently lubricated by the lost oil remaining in the evaporator and lost to the compressor. Another problem arises that wears out and is damaged or consequently shortens its lifespan.

The above-mentioned problems occur even when a sudden rotation frequency of a rotary compressor configured by an inverter type having a variable rotation frequency, or during defrosting of defrosting frost formed on an evaporator, and when a refrigerant pipe is unnecessarily made long. It is pointed out as a problem.

Therefore, an object of the present invention, that is, the object of the present invention is to solve the problems of the conventional rotary compressor, the liquid refrigerant introduced through the cylinder chamber during the initial startup of the rotary compressor is oil The present invention provides a rotary compressor for preventing the discharge through the discharge tube together with the gas refrigerant compressed to high temperature and high pressure after flowing into the lower side of the stored main body.

Another object of the present invention is to provide a rotary compressor which improves the cooling efficiency of the evaporator by preventing the oil mixed in the gas refrigerant compressed to high temperature and high pressure from being discharged through the discharge tube and remaining in the evaporator.

Still another object of the present invention is to prevent the oil mixed with the gas refrigerant compressed to high temperature and high pressure through the discharge pipe and to be lost, thereby sufficiently lubricating the frictional part of the compressor in a state where an appropriate amount of oil is always stored inside the main body. To provide a rotary compressor that can extend the life of the compressor.

1 is a cross-sectional view of a general rotary compressor

2 is a cross-sectional view of a rotary compressor to which the present invention is applied

3 is a perspective view showing a plate in which an oil particle separating member according to the present invention is installed;

4 is a bottom view of a plate on which an oil particle separating member according to the present invention is installed;

Explanation of symbols on the main parts of the drawings

100; Rotary compressor main body 101; Discharge tube

102; Suction pipe 110; motor

111; Axis of rotation 112; Rotor

113; Stator 115; plate

120; Cylinder 121; Cylinder chamber

122, 123; Upper and lower flanges 124; Muffler

131; Crank 132; roller

200; Accumulator 300; Oil particle separating member

310; Coupling hole 320; Rod member

O; oil

In order to achieve the above object, the present invention, the discharge tube and the inlet pipe is penetrated on the lower side of the main body of the closed container shape, and the plate corresponding to the lower side of the discharge tube on the upper side of the inside of the main body of the rotor; In the rotary compressor provided with a cylinder which is installed under the main body is rotated by the lubrication of the oil stored in the main body and compressing the refrigerant recovered through the accumulator, the plate rotates integrally with the rotor Provided is a rotary compressor characterized in that the oil particle separating member is provided to bounce off the particles of the oil mixed with the gas refrigerant compressed to high temperature and high pressure by the cylinder.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention for achieving this object will be described in detail.

2 is a cross-sectional view showing the internal configuration of a general rotary compressor installed oil particle separating member according to the present invention, Figure 3 is a perspective view of the oil particle separating member according to the present invention, Figure 4 is an oil particle separating member according to the present invention As the bottom view of, the same parts as in the prior art have been described with the same reference numerals.

As shown in the drawing, the rotary compressor according to the present invention has an overall appearance formed by the main body 100 having a closed container shape, and the discharge pipe 101 and the suction pipe 102 communicate with the upper and lower sides thereof. Is installed.

The discharge tube 101 is connected to the condenser by a refrigerant pipe (not shown), and the suction tube 102 has one end portion protruding at a predetermined height inside the accumulator 200 and the other end cylinder described later. It is installed in communication with the cylinder chamber formed in.

The accumulator 200 is provided with a screen 210 formed of a mesh so that the liquid refrigerant and the gaseous refrigerant recovered through the evaporator described later are separated and passed therein.

On the other hand, the motor 110 is installed inside the main body 100.

The motor 110 includes a stator 113 fixed to an inner circumferential surface of the main body 100, a rotor 112 and a rotating shaft 111 disposed at a central portion thereof.

An upper side of the rotor 112 is provided with a blade piece 114 that functions as a balancer, and the upper side of the rotor 112 is fitted with a plate 115 into which the inlet side of the discharge tube 101 is fitted.

In addition, a cylinder 120 is disposed directly below the motor 110.

The cylinder 120 is coupled to the lower end of the rotation shaft 111 by upper and lower flanges 122 and 123, and a hollow cylinder chamber 121 communicating with the suction pipe 102 is formed therein.

In addition, the upper flange 122 is covered with a muffler 124 on the upper side, and the upper flange 122 and the muffler 124 is formed with an exhaust hole not shown in communication with the cylinder chamber 121.

On the other hand, an eccentric crank 131 is installed at the lower end of the rotating shaft 111 located inside the cylinder chamber 121, the roller 132 is fitted to the crank 131.

In addition, one side outer circumferential surface of the roller 132 is tethered so that the vanes (not shown) are always in line contact, and the cylinder chamber 121 is divided into a suction chamber and a compression chamber, and these configurations are similar to those of a general rotary compressor. Has one configuration.

However, in the present invention, the gas refrigerant compressed by the high temperature and high pressure in the cylinder chamber 120 and the oil (O) mixed in the gas refrigerant through the exhaust hole formed in the upper flange 122 and the muffler 124 An oil particle separating member 300 forcibly separating and separating the gas refrigerant and oil O after being ejected to the inside of the main body 100 and before being discharged through the discharge pipe 101 is provided.

The oil particle separating member 300 is provided with a plurality of rod members 320 radially vertically provided at equal intervals on the lower outer peripheral side of the plate 115 having a coupling hole 310 in the center thereof.

Preferably, the rod member 320 may be configured as a tubular cross-section, but is preferably configured as a rod.

The operation and effects of the present invention configured as described above will be described.

That is, when the rotary shaft 111 which has the motor 110 is rotated at a high speed, the roller 132 is the cylinder chamber 121 by the crank 131 eccentrically arranged at the lower end of the rotary shaft 111. Rotating and revolving in the inside, the heat exchange in the evaporator and the function of sucking the gas refrigerant at room temperature recovered to the accumulator 200 back to the inside of the cylinder chamber 121 and the sucked refrigerant at high temperature and high pressure Compress with the same function.

Therefore, the gaseous refrigerant sucked into the cylinder chamber 121 through the accumulator 200 and the suction pipe 102 by the crank 131 and the roller 132 is again the roller 132. After being compressed to high temperature and high pressure by the discharge to the inside of the main body 100 is circulated in the same manner as in the prior art along the flow path of the refrigerating device through the discharge pipe 101.

In addition, during the initial startup of the rotary compressor, the liquid refrigerant not evaporated in the evaporator flows into the lower side of the main body in which the oil O is stored through the cylinder chamber 121, and thus the specific gravity is lower than that of the liquid refrigerant. The oil O is floated to the upper side of the liquid refrigerant, and flows in the same manner as the arrow of FIG.

However, a feature of the present invention is that, as described above, even if oil particles are mixed with the gas refrigerant having a high temperature and high pressure toward the inside of the main body 100, they are not discharged through the discharge pipe 101.

That is, as shown in Figure 2, the upper side of the rotor 112 that rotates at high speed is provided with a plate 115 that is integrally rotated, the plate 115 has a plurality of functions to function as the oil particle separation member 300 Due to the structure in which the rod member 320 is integrally installed, when the rotor 112 rotates at a high speed, centrifugal force is generated in the rod member 320 and oil particles having a specific gravity greater than that of the gas refrigerant are contained in the body 100. It bounces toward the side.

Therefore, the oil particles bounced off the inner surface of the main body 100 flows to the inner lower side of the main body along the inner wall surface thereof and is recovered, and only the gas refrigerant flows in between the rod members 320, and then the discharge pipe 101. Is discharged through).

Of course, the discharged refrigerant is recovered to the compressor through the condenser, the evaporator and the accumulator.

Therefore, as conventionally, the oil discharged through the discharge pipe together with the gas refrigerant compressed to high temperature and high pressure is remaining on the inner wall surface of the evaporator composed of the pipe while circulating along each refrigerant pipe forming the refrigeration cycle, the refrigerant Can not flow smoothly, the problem that lowered the cooling efficiency of the evaporator is solved.

In addition, the loss of oil remaining in the evaporator and unrecovered by the compressor makes it impossible to sufficiently lubricate the driving part of the compressor, thereby solving the conventional problem of the wear and damage of the compressor or shortening the service life.

As described in detail above, the present invention, the oil discharged together with the high-temperature, high-pressure gas refrigerant during the initial startup of the rotary compressor is discharged through the discharge pipe, thereby preventing the cooling efficiency of the evaporator by circulating along the refrigerating cycle It is also possible to improve the life of the compressor by smooth lubrication of the compressor.

Claims (2)

A discharge tube and an inlet tube penetrate the upper and lower sides of the sealed container main body, and a motor having a plate corresponding to the lower side of the discharge tube is provided on the upper side of the rotor at the upper side of the main body. In a rotary compressor having a cylinder that rotates by lubrication of oil stored in the compressor and compresses the refrigerant recovered through the accumulator, The plate is rotated integrally with the rotor and the rotary compressor characterized in that the oil particle separation member is provided to bounce off the particles of the oil mixed with the gas refrigerant compressed to high temperature and high pressure by the cylinder. The method of claim 1, wherein the oil particle separating member is provided with a plurality of rod members provided radially vertically at equal intervals on the lower outer periphery of the plate having a coupling hole coupled to the lower end of the discharge tube. Rotary compressors.