KR100217121B1 - A rotary compressor - Google Patents

Abstract

According to the present invention, the eccentric shaft 40 rotating in the cylindrical cylinder 30 and the rollers 50 returning according to the rotation of the eccentric shaft 40 and bearing plates 60 and 70 are respectively installed on the upper and lower sides. In the compressor 10, an upper bearing 60 having a suction hole 61 for sucking refrigerant gas into the cylinder 30, and a first discharge for discharging the refrigerant gas compressed from the cylinder 30. A lower bearing 70 having a second discharge hole 72 for discharging the refrigerant gas discharged through the hole 71 and the first discharge hole 71 to the outside of the compressor 10, and the upper bearing 60. Coolant gas inlet 310 is formed on the upper surface is coupled to the compressor having a cylinder 30 formed with the first discharge port 320 and the second discharge port 330 on the lower surface coupled to the lower bearing 70 It is possible to remove the accumulator, which is a component in the system, so that the number of parts can be increased and the manufacturing process can be reduced. Can reduce the volume occupied by the volume. In addition, since the upper part of the compressor is maintained at a low temperature and low pressure refrigerant gas, the power consumption of the compressor can be reduced by increasing the cooling efficiency of the motor, and the refrigerant discharged from the cylinder does not heat exchange with the motor, so no further temperature rise occurs. The condensation load in the condenser can be reduced.

Description

Rotary compressor

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary compressor, and more particularly to a rotary compressor which maintains a partial low pressure inside the compressor shell, removes the accumulator which is a component of the rotary compressor, and cools the motor with a low temperature refrigerant.

In general, an air conditioner absorbs ambient heat, and an evaporator, which supplies cold air to the room, is installed indoors with a barrier wall interposed therebetween. The capillary tube, which reduces the pressure and sends it to the evaporator, is installed outside the blocking wall, that is, outdoors.

Figure 3 is a view for explaining a conventional rotary compressor as described above, Figure 4 is a cross-sectional view showing the assembly state of a conventional rotary compressor, the low-temperature, low-pressure refrigerant gas evaporated from the evaporator to the outside of the compressor 10 to suck in An accumulator 80 having a suction pipe 81 is provided, and an electric motor 20 is built into the compressor 10, and a cylinder 30 is provided at a lower side thereof, so that the rollers are mounted on the eccentric shaft 40. 50) are reduced and bearing plates 60 and 70 are respectively provided on the upper and lower parts.

Moreover, it consists of the eccentric shaft 40 which rotates in the cylindrical cylinder 30, and the roller 50 which rotates with the rotation of the said eccentric shaft 40. As shown in FIG.

On the other hand, the inlet port 31 through which the refrigerant gas enters, the outlet port 33 for compressing the sucked refrigerant gas out of the compression chamber 32, and the discharge valve 34 for opening and closing the outlet port 33 are formed and compressed. It consists of the vane 35 which isolate | separates the chamber 32 and the suction chamber.

In the closed rotary compressor configured as described above, the low-temperature and low-pressure refrigerant gas evaporated from the evaporator is directly sucked into the suction port 31 of the compressor 10 through the suction pipe 81, and at this time, the inflow of the liquid refrigerant is prevented. In order to prevent it, the suction port 31 of the cylinder 30 is sucked through the accumulator 80 installed in the suction pipe passage.

Therefore, while the rotational force of the motor is transmitted directly to the eccentric shaft 40 and rotates, the refrigerant gas entering through the suction port 31 is compressed as the eccentric shaft 40 rotates, and the compressed refrigerant gas is discharge valve ( 34 is released by the action of opening and closing under the pressure of the compression chamber 32 and the pressure outside the compression chamber 32.

Meanwhile, the high temperature and high pressure refrigerant gas compressed in the cylinder 30 is discharged into the cylinder 30 and then discharged into the condenser through the discharge tube 90 through the compressor 10. The temperature and pressure are formed by the high temperature and high pressure refrigerant gas, and thus, the motor cooling of the compressor 10 is also performed, and heat exchange is performed between the high temperature and high pressure refrigerant gas.

However, in the compressor 10, the accumulator 80 is essentially installed in the suction pipe to prevent the inflow of the liquid refrigerant, thereby increasing the number of parts and the manufacturing process, as well as the volume occupied by the compressor 10. In addition, since the motor is cooled by the high temperature / high pressure refrigerant gas discharged from the cylinder 10 in terms of cooling of the motor, there is a problem that the cooling performance is not efficient.

In addition, since the temperature of the refrigerant gas is increased by heat exchange with the motor, an increase in the condensation load in the condenser has been pointed out as another problem.

The present invention forms a refrigerant gas suction hole in the upper bearing, the first discharge hole and the second discharge hole in the lower bearing, the refrigerant gas inlet and the compressed refrigerant gas is discharged to the cylinder coupled to the upper and lower bearings By providing the first and second discharge ports, the internal pressure of the compressor shell is partially maintained at a low pressure, and the rotary compressor is provided to remove the accumulator which is a component of the rotary compressor and to cool the motor with a low temperature refrigerant. It is for that purpose.

The present invention is an eccentric shaft that rotates in a cylindrical cylinder, a roller that rotates according to the rotation of the eccentric shaft, and a compressor having bearing plates respectively installed on the upper and lower sides, the upper bearing having a suction hole for sucking refrigerant gas into the cylinder. And a lower bearing having a first discharge hole for discharging the refrigerant gas compressed from the cylinder and a second discharge hole for discharging the refrigerant gas discharged through the first discharge hole to the outside of the compressor, and the upper bearing. Refrigerant gas inlet is formed on the upper surface is characterized in that it comprises a cylinder having a first discharge port and the second discharge port on the lower surface coupled to the lower bearing.

1 is an exploded perspective view for explaining the coupling state of the upper and lower bearings and the cylinder according to the present invention,

2 is a sectional view showing a rotary compressor according to the present invention;

3 is a view for explaining a conventional rotary compressor,

Figure 4 is a cross-sectional view showing an assembled state of a conventional rotary compressor.

* Explanation of symbols for the main parts of the drawings

10 compressor 30 cylinder

31.310: suction port 32: compression chamber

33: discharge port 34: discharge valve

35: vane 40: eccentric shaft

60: upper bearing 61: suction hole

70: lower bearing 71: first discharge hole

72: second discharge hole 73: muffler

320: first discharge port 321: discharge valve

330: second discharge port 810: suction pipe

900 discharge tube

Hereinafter, the operation and effects of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exploded perspective view for explaining the coupling state of the upper and lower bearings and the cylinder according to the present invention, Figure 2 is a cross-sectional view showing a rotary compressor according to the present invention, the refrigerant in the cylinder 30 in the upper bearing 60 A suction hole 61 for sucking gas is formed, and a suction port 310 formed with a conduit inwardly is formed on an upper surface of the cylinder 30 to coincide with the suction hole 61.

In addition, a first discharge port 320 through which the refrigerant gas compressed to the lower surface is discharged in the cylinder 30 is formed, and the refrigerant gas discharged through the first discharge port 320 can be discharged to the outside of the compressor 10. The second discharge port 330 is formed to be connected to the discharge pipe 900 so that the pipe is formed.

Meanwhile, the lower bearing 70 in which the first discharge hole 71 and the second discharge hole 72 are formed to match the first and second discharge holes 320 and 330 formed on the lower surface of the cylinder 30 is formed. It is coupled to the lower surface, the lower side of the lower bearing 70, the muffler 73 to move the refrigerant so that the refrigerant discharged through the first discharge hole 71 can be discharged through the second discharge hole (72) Consists of.

In the compressor 10 configured as described above, the electric motor 20 is internally installed, and the first discharge port 320 and the first discharge port 320 and the discharge valve 321 formed on the upper and lower surfaces of the compressor 10 and the lower part thereof are formed on the lower side. 2 Install the cylinder 30 having the discharge port 330 to reduce the roller 50 on the eccentric shaft 40, the suction hole 61 and the first and second upper and lower portions of the cylinder 30 Upper and lower bearings 60 and 70 having discharge holes 71 and 72 are formed, respectively, and a muffler 73 is installed below the lower bearing 70.

Therefore, the refrigerant gas evaporated from the evaporator is sucked into the compressor 10 through the suction pipe 810 of the upper part of the compressor 10. At this time, since the refrigerant gas is a low temperature and low pressure refrigerant gas, heat exchange with the motor is performed smoothly. In addition, even when the liquid refrigerant gas which has not been evaporated flows in, the evaporation of the liquid refrigerant gas occurs continuously due to the high temperature of the motor, so that the installation of the accumulator 80 becomes unnecessary.

On the other hand, when the whole inside of the compressor 10 is made low pressure, it suctions in the cylinder 30 by the pressure difference between the pressure of the compression chamber 32 in the cylinder 30 in the compressor 10, and the outside of the cylinder 30. The vanes 35 separating the seal 36 and the compression chamber 32 are pushed out, so that the compression action cannot occur.

That is, in the conventional compressor 10, since the compressed pressure acts on the back surface of the vane 35, the compression chamber 32 and the suction chamber 36 may be distinguished from each other by being closely contacted with the vane 35. When the internal pressure is low, the low pressure acts on the back of the vane 35, and the vane 35 and the roller 50 do not come into close contact with each other and thus do not perform compression.

Accordingly, in order for the vanes 35 and the rollers 50 to be completely in contact with each other, the compressor 10 may be driven based on the upper bearing 60 in which the suction holes 61 are formed such that the compression pressure acts on the back surface of the vanes 35 as in the related art. It will be divided into upper and lower parts.

Accordingly, the refrigerant gas evaporated by the evaporator is sucked into the compressor 10 through the suction pipe 810 of the upper part of the compressor 10 to exchange heat with the motor, and then through the suction hole 61 formed in the upper bearing 60. The suction chamber 310 is sucked into the compression chamber 32 via the suction port 310 of the cylinder 30.

Therefore, while the rotational force of the motor is directly transmitted to the eccentric shaft 40 and rotates, at this time, the refrigerant gas flowing through the suction port 310 is compressed as the eccentric shaft 40 and the roller 50 rotate in contact with the oil film. The compressed refrigerant gas is passed through a first discharge hole 71 of the lower bearing 70 through a discharge valve 321 formed at a lower portion of the first discharge port 320 formed on the lower surface of the cylinder 30. The lower part of the compressor 10 forms high pressure as it is discharged to 73.

On the other hand, the lower bearing formed to move the refrigerant gas discharged to discharge the refrigerant gas discharged to the muffler 73 through the first discharge hole 71 of the lower bearing 70 to the condenser outside the compressor 10 ( A pipeline is formed through the second discharge hole 72 of 70 to be discharged to the condenser via the second discharge port 330 of the cylinder 30 connected to the discharge tube 900.

As described above, the present invention can remove the accumulator, which is a component of the conventional rotary compressor, so that the number of parts and the manufacturing process can be reduced, and the volume occupied by the compressor can be reduced.

In addition, since the upper part of the compressor is maintained at a low temperature and low pressure refrigerant gas, the power consumption of the compressor can be reduced by increasing the cooling efficiency of the motor, and the refrigerant discharged from the cylinder does not heat exchange with the motor, so no further temperature rise occurs. Therefore, the condensation load in the condenser can be reduced.

Claims (1)

Compressor in which the eccentric shaft 40 which rotates in the cylindrical cylinder 30, the roller 50 which rotates according to the rotation of the eccentric shaft 40, and the bearing plates 60 and 70 are installed in the upper and lower parts, respectively ( 10), An upper bearing 60 formed with a suction hole 61 for sucking refrigerant gas into the cylinder 30; The first discharge hole 71 for discharging the refrigerant gas compressed in the cylinder 30 and the second discharge hole for discharging the refrigerant gas discharged through the first discharge hole 71 to the outside of the compressor 10 ( A lower bearing 70 in which 72 is formed; A cylinder 30 having a refrigerant gas inlet 310 formed on an upper surface coupled to the upper bearing 60, and a first discharge port 320 and a second discharge port 330 formed on a lower surface coupled to the lower bearing 70. Rotary compressor comprising a).

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