KR19990084370A - Compressor with rotor of soil reducing structure - Google Patents

Abstract

Disclosed is a compressor having a rotor of an oil reduction structure which prevents oil from being discharged out of the compressor between the rotor and the stator in the compressor. In the compressor having a rotor of the disclosed oil reduction structure, the stator is fixed to the inner circumference of the body, the rotor is disposed in the center of the stator, the end ring is fixed to the upper and lower ends of the rotor, the end ring is It is characterized in that the diameter of one side thereof in contact with the rotor is formed smaller than the diameter of the other side. Accordingly, the end ring fixed in contact with the rotor is formed in an inclined outer circumference such that its diameter increases from one side to the opposite side thereof, thereby preventing oil discharged together with the heat exchange medium between the stator and the rotor from being discharged to the outside of the compressor. Accordingly, since no oil remains on the inner wall surface of the heat exchanger connected to the compressor, it is possible to prevent the heat exchange efficiency of the heat exchanger from being lowered.

Description

Compressor with rotor of soil reducing structure

The present invention relates to a compressor, and more particularly, to a compressor having a rotor of an oil reduction structure for preventing oil from being discharged out of the compressor through between the rotor and the stator in the compressor.

Generally, a compressor is a mechanical device that compresses gas and raises its pressure. Such a compressor is composed of a cycle of inhaling, compressing, and discharging air according to rotation of a roller in a cylinder and opening / closing of a valve to compress a heat exchange medium of a gas into a liquid state at a high temperature and high pressure.

As shown in FIG. 1, the conventional compressor includes a main body 20 in a sealed container shape, a motor 30 installed inside the main body 20, and a cylinder assembly 40 connected to the motor 30. It is provided.

The main body 20 is provided with a discharge tube 21 piped by a condenser and a coolant tube not shown on the upper side, and an evaporator (not shown) and an accumulator 50 on the lower side with respect to the main body 20. A suction pipe 22 is formed to pipe through.

The motor 30 is composed of a stator 31 and a rotor 40. The stator 31 is fixed to the inner circumference of the main body 20, and the rotor 40 has a rotary shaft 32 pressed in the center thereof. It is fixed and the end ring 41 is fixed to the upper and lower ends.

Here, the end ring 41 is formed in contact with the upper surface of the rotor 40 is larger than the opposite surface. That is, the outer peripheral surface of the end ring 41 is tapered.

The cylinder assembly 50 includes a cylinder 52 having a space for rotating the roller 51 rotated by the rotation shaft 32, and upper and lower flanges surrounding the cylinder 52 and supporting the rotation shaft 32. 53, 54).

Exhaust hole 56 is fixed to the upper side of the upper flange 53, the muffler 55 is fixed, the upper flange 53 and the muffler 55 is in communication with the space provided inside the cylinder 52 to discharge oil and refrigerant Is formed.

That is, when the rotor of the motor 30 rotates at a high speed, the roller 51 is rotated by the eccentric protrusion 33 provided at the lower end of the rotating shaft 32 installed in the center of the rotor 40. Rotation and revolution are repeated within a predetermined space.

The roller 51 repeating the rotation and the revolution compresses the heat exchange medium sucked back into the space of the cylinder 52 through the heat accumulator 50 which has undergone heat exchange in the evaporator.

Therefore, the gas heat exchange medium sucked into the space of the cylinder 52 is compressed into a gas of high temperature and high pressure in the space of the cylinder 52, and then through the discharge hole 56 formed in the upper flange 53 and the muffler 55. As shown by the arrow of FIG. 1 to the upper side of the main body 20, it is ejected through the discharge pipe 21 and circulated along the flow path of the refrigerating device.

That is, during operation of the compressor 10 to compress the refrigerant, oil stored therein is formed between the stator 31 and the rotor 40 of the motor 30 as shown by the arrow shown in FIG. 1. It was ejected vertically together with the refrigerant compressed through the gap, and was discharged without any restriction through the discharge pipe 21 penetrated above the main body 20.

Therefore, after the oil mixed with the compressed refrigerant is introduced through the discharge pipe 21, the refrigerant pipe and the heat exchanger (not shown) remain in the process of circulating along each of the refrigerating devices. By suppressing the circulation of the heat exchange medium, the heat exchange performance of the refrigerant is reduced.

In addition, the driving part of the compressor 10 may not be sufficiently lubricated by the oil that is not recovered back to the compressor 10 in the state of remaining in the refrigerant pipe or the evaporator as described above, and the oil may be insufficiently lubricated. It has been a cause of damage, and eventually a problem with the reliability of the product to shorten the life of the compressor 10 by the insufficient oil also occurred.

Accordingly, an object of the present invention, that is, an object of the present invention is to prevent oil from being discharged to the outside of the main body together with the heat exchange medium between the stator and the rotor of the motor to maintain the proper amount of oil in the main body at all times. In addition, the present invention provides a compressor having a rotor of a soil reducing structure that not only increases heat exchange efficiency of the heat exchanger but also extends the life of the product.

1 is a cross-sectional view showing a conventional compressor,

2 is a cross-sectional view showing a compressor according to a preferred embodiment of the present invention;

3 is a perspective view showing a rotor of a compressor according to a preferred embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

100; Compressor 110; main body

120; Motor 130; Rotor

131; End ring 140; Cylinder assembly

141; Roller 142; cylinder

143; Upper flange 144; Bottom flange

145; Muffler

The above object of the present invention, the stator is fixed to the inner circumference of the main body, the rotor is disposed in the center of the stator, the end ring is fixed in the upper and lower ends of the rotor, the end ring is the rotor It is achieved by providing a compressor having a rotor of a soil reducing structure, characterized in that the diameter of one side thereof in contact is less than the diameter of the other side thereof.

According to the present invention, the end ring fixed in contact with the rotor is formed in the outer periphery so that the diameter increases from one side to the opposite side, the oil discharged together with the heat exchange medium between the stator and the rotor to the outside of the compressor The discharge can be prevented.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a cross-sectional view showing a compressor according to a preferred embodiment of the present invention, Figure 4 is a cross-sectional view showing a rotor of the compressor according to a preferred embodiment of the present invention.

As shown, the compressor 100 according to the present invention is the motor 120 is press-fit fixed to the main body 110 of the sealed container form, the cylinder assembly 140 is installed on the lower side of the motor 120 is Receives a rotational force of the motor 120 to compress the heat exchange medium to discharge the heat exchange medium to the outside of the main body 110.

Here, the cylinder assembly 140 surrounds the cylinder 142 having a predetermined space and the cylinder 142 to rotate and revolve the roller 141 fitted to the rotary shaft 121, and surround the rotary shaft 121. Supporting upper and lower flanges (143, 144) are provided. The muffler 145 is fixed to the upper side of the upper flange 143, and the muffler 145 is formed with a discharge hole 146 through which the heat exchange medium compressed by the cylinder 142 is discharged.

The motor 120 fixed inside the main body 110 includes a stator 122 and a rotor 130, the stator 122 is press-fitted into the inner circumference of the main body 110, and the rotor 130 is a stator ( It is rotatably disposed in the center of the 122, the end ring 131 is fixed to the upper and lower ends.

Here, the end ring 131 is fixed to the upper and lower ends of the rotor 130, the outer circumferential surface is formed to be inclined so that the surface contacting the upper and lower ends of the rotor 130 is smaller than the surface of the opposite side.

When the heat exchange medium compressed in the space portion of the cylinder 142 is discharged between the rotor 130 and the stator 122, the oil discharged by mixing with the heat exchange medium hits the outer circumferential surface of the end ring 131 as the inclined surface. Along the outer circumferential surface of the electron 130 is collected at the bottom of the main body 110 again.

Therefore, as is conventional, oil discharged through the discharge tube 111 together with the gas heat exchange medium compressed to high temperature and high pressure remains on the inner wall surface of the heat exchanger composed of the tube while circulating along each tube forming the heat exchange cycle. As a result, the heat exchange medium may not flow smoothly, thereby reducing the cooling efficiency of the heat exchanger.

As described above, according to the present invention, by forming the core provided on the upper side of the rotor to the inclined surface, it is possible to prevent the oil is discharged to the outside of the main body together with the heat exchange medium between the stator and the rotor.

Therefore, not only the oil stored in the main body can be always maintained in an appropriate amount, but also the heat exchange efficiency of the heat exchanger can be increased, and the performance of the compressor can be improved.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

Claims (2)

In the compressor in which the stator is fixed to the inner circumference of the main body, the rotor is disposed in the center of the stator, the end ring is fixed to the upper and lower ends of the rotor, The end ring is a compressor having a rotor of the soil reduction structure, characterized in that the diameter of one side of the contact with the rotor is less than the diameter of the other side. 2. The compressor as claimed in claim 1, wherein the end ring is inclined so that its diameter increases from one surface in contact with the rotor to the other surface thereof.