KR20040043669A - Hermetic rotary compressor - Google Patents

Abstract

PURPOSE: A hermetic rotary compressor is provided to prevent vibration by equally generating absorbing force and discharge force for a refrigerant, and improve the compression efficiency by increasing the number of strokes per one rotation of a rotary shaft. CONSTITUTION: A cylinder assembly includes a cylinder having a plurality of absorbing and discharge ports(171,172,173,174), and upper and lower bearings combined with the cylinder for forming a hermetic space. A rotary shaft(50) passes through the cylinder assembly to be rotatively fixed by the upper and lower bearings, and has an eccentric part(51) inside the hermetic space. A rolling piston rotates and revolves in the hermetic space, interworking with the eccentric part of the rotary shaft. A plurality of vanes(110,120) are inserted into the cylinder to reciprocate in a straight line in a radius direction to be contacted with the rolling piston on one end. The plurality of vanes divide the hermetic space to discharge the refrigerant through the discharge ports.

Description

Hermetic rotary compressors {HERMETIC ROTARY COMPRESSOR}

The present invention relates to a hermetic rotary compressor, and more particularly, to provide a plurality of compression spaces in which a refrigerant is sucked into a cylinder and discharged after compression, thereby improving compression efficiency and reducing vibration by balancing. A hermetic rotary compressor.

Hereinafter, a conventional hermetic rotary compressor will be described with reference to the accompanying drawings, FIG. 1 is a longitudinal sectional view of a conventional hermetic rotary compressor, and FIG. 2 is a perspective view showing an operating state of a conventional hermetic rotary compressor.

As shown in the drawing, in the conventional hermetic rotary compressor 1, the electric mechanism part 20 is mounted on the upper side of the sealed container 10, and the compression mechanism part 60 is spaced downward from the electric mechanism part 20 at a lower side. Is configured to be mounted.

The motor mechanism 20 includes a stator 30 that generates magnetic force by an applied power source, a rotor 40 that rotates by a magnetic flux of induced magnetic force formed by the magnetic force of the stator 30, and its rotation. It consists of a rotating shaft 50 for transmitting the rotational force is press-fit fixed to the center of the electron (40).

The compression mechanism 60 is assembled to the cylinder 70, the cylinder 70, the upper and lower parts to form a closed space 200 in the interior of the cylinder, and the rotation shaft 50 to the inside of the cylinder 70 It consists of a cylinder assembly provided with an upper bearing (80) and a lower bearing (90) for fixing and rotatably penetrating therethrough.

In addition, an eccentric portion 51 of the rotation shaft 50 is formed in the sealed space 200 of the cylinder 70, and is positioned outside the eccentric portion 51 to rotate and revolve by the eccentric portion. The rolling piston 100 and the outer circumferential surface of the rolling piston 100 and one end portion thereof are in line contact with each other to form a sealed space 9 formed by the inner circumferential surface of the cylinder 70 and the outer circumferential surface of the rolling piston 100. Each vane 110 is divided into compression zones.

The cylinder 70 has a vane receiving groove 73 formed to be recessed on an inner circumferential surface of the vane 110 so as to be elastically supported by the elastic member 111 so as to be linearly reciprocated in the radial direction and suction of refrigerant gas. In order to communicate with the suction area on one side of the vane receiving groove 73, the suction port 71 formed through the wall surface, and the upper edge portion of the inner peripheral surface to discharge the gas compressed in the other side compression area of the vane 110 The discharge port 73 formed thereon is provided.

In the figure, reference numeral 11 denotes a suction pipe, 12 a discharge pipe, and 120 a muffler.

By such a configuration, in the hermetic rotary compressor of the present invention, the rotor 40 is rotated by a magnetic flux formed between the stator 30 and the rotor 40 by the power applied to the electric mechanism unit 20. The driving force is transmitted by the rotation shaft 50, which is press-fitted and fixed to the center of the rotor 40, and the rolling piston 100 interlocked with the eccentric portion 51 formed at the bottom of the rotation shaft 50 is the vane 110. ) Is orbited based on the center of the shaft in the sealed space 200 of the cylinder 70 in the contact state.

The low pressure refrigerant gas is introduced into the suction port 71 by the volume change of the inner space of the sealed space 200 of the cylinder by the revolution of the rolling piston 100 and the closed space 200 formed by the outer circumferential surface of the rolling piston 100. Through it is sucked into the sealed space 200 of the suction region of the cylinder 70 is compressed to a high pressure state.

The compressed refrigerant gas is discharged between the upper bearing 80 and the muffler 81 through the discharge port 72 with the operation of the on-off valve assembly (not shown), and after the noise is reduced by the muffler 17 It is discharged through the discharge pipe 12 penetrating the upper portion of the sealed container via between the stator 30 and the rotor 40.

However, in the conventional hermetic rotary compressor, the suction port 71 and the discharge port 73 are formed close to both sides of the vane accommodating groove 73, so that the suction force and the earth output generated by the suction and discharge of the refrigerant are increased. Eccentricity occurs on one side of the cylinder, resulting in an overall imbalance of the compressor, and a problem arises in that vibration is generated by such an imbalance.

In addition, although one stroke of suction, compression, and discharge is performed linearly while the rotation shaft 50 rotates once, the compression efficiency is deteriorated due to the loss of work generated when one stroke is performed per rotation of the rotation shaft. .

According to the present invention devised to solve the above problems by uniformly generating the refrigerant suction force and earth output of the hermetic rotary compressor to maintain the balance to prevent the occurrence of vibration and increase the number of strokes performed per one revolution of the rotary shaft It is an object of the present invention to provide a hermetic rotary compressor to improve the compression efficiency.

1 is a longitudinal sectional view of a conventional hermetic rotary compressor,

Figure 2 is a perspective view showing the operating state of the conventional hermetic rotary compressor,

3 is a longitudinal sectional view of the hermetic rotary compressor of the present invention;

4 is a perspective view showing an operating state of the hermetic rotary compressor of the present invention;

5 is a perspective view showing a cylinder of the hermetic rotary compressor of the present invention;

6 is a plan view showing a compressed state of the first compression chamber of the present invention;

7 is a diagram illustrating the operating state of FIG. 6;

8 is a plan view showing a compressed state of the second compression chamber of the present invention;

9 is a diagram illustrating the operating state of FIG. 8;

* Description of the main parts of the drawings *

A: first compression chamber B: second compression chamber

10: hermetic container 11: second suction piping

13: 1st suction piping 15: outlet

20: electric mechanism part 30: stator

40: rotor 50: axis of rotation

51: eccentric unit 60: compressor section

80: upper bearing 81: muffler

90: lower bearing 100: rolling piston

110, 120: vane 170: cylinder

171, 172: suction port 173, 174: discharge port

175,176: vane receiving groove

In order to achieve the above object, the present invention is a cylinder assembly having a plurality of suction ports and discharge ports and the upper and lower cylinders coupled to the upper and lower portions of the cylinder to form a sealed space, and through the cylinder assembly; Rotating shaft is fixed by the upper and lower bearings, the eccentric portion is formed inside the sealed space, a rolling piston that rotates and revolves inside the sealed space in conjunction with the eccentric portion of the rotating shaft, and one end of the rolling piston And a plurality of vanes for dividing and partitioning the sealed space so that the refrigerant sucked into each suction port is compressed and discharged to each of the suction ports so as to be linearly reciprocated in the radial direction so as to make linear contact. It is achieved by a hermetic compressor rotary compressor.

Hereinafter, the configuration and operation of the sealed rotary compressor of the present invention will be described in detail with reference to the accompanying drawings.

3 or 9 shows a hermetic rotary compressor according to an embodiment of the present invention, Figure 3 is a longitudinal sectional view of the hermetic rotary compressor, Figure 4 is a perspective view showing the operating state of the hermetic rotary compressor, Figure 5 6 is a perspective view showing a cylinder, FIG. 6 is a plan view showing a compressed state of the first compression chamber of the cylinder, FIG. 7 is a diagram showing an operating state of FIG. 6, and FIG. 8 is a view of the second compression chamber of the cylinder. 9 is a plan view showing a compressed state, and FIG. 9 is a diagram illustrating the operating state of FIG. 8.

As shown in the drawing, the hermetic rotary compressor according to an embodiment of the present invention is equipped with an electric mechanism part 20 on the upper side of the sealed container 10 and compressed at a predetermined interval downward on the electric machine part 20. The mechanism 60 is configured to be mounted.

The motor mechanism 20 includes a stator 30 that generates magnetic force by an applied power source, a rotor 40 that rotates by a magnetic flux of induced magnetic force formed by the magnetic force of the stator 30, and its rotation. It consists of a rotating shaft 50 for transmitting the rotational force is press-fit fixed to the center of the electron (40).

The compression mechanism 60 is assembled to the cylinder 170, the cylinder 170, the upper and lower parts to form a sealed space 200 in the cylinder, and the rotation shaft 50 to the inside of the cylinder 170 It consists of a cylinder assembly provided with an upper bearing (80) and a lower bearing (90) for fixing and rotatably penetrating therethrough.

In addition, an eccentric portion 51 of the rotation shaft 50 is formed in the sealed space 200 of the cylinder 170, and is rotated by the eccentric portion 51 positioned outside the eccentric portion 51. And a rolling piston 100 that revolves, and an outer circumferential surface of the rolling piston 100 and one end thereof are in line contact with each other to form a sealed space 200 formed by an inner circumferential surface of the cylinder 170 and an outer circumferential surface of the rolling piston 100. Two vanes 110 and 120 are divided into a first compression chamber A and a second compression chamber B having respective suction and compression zones, respectively.

At this time, the hypothesis position of each vane 110, 120 is preferably hypothesized at the position to equalize the closed space 200 of the cylinder 170.

In addition, in the case of dividing the sealed space 200 of the cylinder 170 into a compression chamber having a plurality of suction zones and compression zones, it is preferable to equalize by a plurality of vanes.

In addition, the cylinder 170 has vane receiving grooves 175 and 176 formed on the inner circumferential surface of the vanes 110 and 120 so as to be accommodated by the respective elastic members to be linearly reciprocated in the radial direction. And suction ports 171 and 172 formed through the wall to communicate with each of the vane accommodating grooves 175 and 176, and the upper side of the inner circumferential surface to discharge the compressed refrigerant gas from the other compression region. Discharge ports 173 and 174 formed along a part of the corner are respectively provided.

The suction ports 171 and 172 are respectively connected to the first suction pipe 13 in communication with the first compression chamber (A), and the second suction pipe (11) connected in communication with the second compression chamber (B). Are respectively provided.

In addition, the first suction pipe and the second suction pipe is preferably provided with an accumulator (not shown) for separating the gas-liquid state of the refrigerant flowing along each pipe.

The upper bearing 80 is formed at each discharge port (not shown) in communication with each of the discharge ports 174 and 175 formed in each of the first compression chamber A and the second compression chamber B of the cylinder 170. And discharge valves (not shown) for opening and closing the discharge ports 15 above the respective discharge ports (not shown), respectively, and a muffler 81 formed by screwing to the upper side thereof.

In the drawing, reference numeral 12 denotes a discharge tube.

By such a configuration, in the hermetic rotary compressor of the present invention, the rotor 40 is rotated by a magnetic flux formed between the stator 30 and the rotor 40 by the power applied to the electric mechanism unit 20. The driving force is transmitted by the rotation shaft 50, which is press-fitted and fixed to the center of the rotor 40, and the rolling piston 100 is interlocked with the eccentric portion 51 formed at the bottom of the rotation shaft 50. In the state of being in contact with the 110 and 120 is to revolve around the eccentric 51 in the sealed space 200 of the cylinder 170.

The volume of the first compression chamber A and the second compression chamber B of the cylinder 170 divided into vanes 110 and 120 by the revolving of the rolling piston 100 is variable, so that the low pressure refrigerant The gas is sucked through each of the suction ports 171 and 172, and then compressed and discharged to each of the discharge ports 173 and 174.

At this time, the discharge stroke of the first compression chamber (A) of the cylinder 170 and the suction stroke of the second compression chamber (B) are simultaneously performed, and the suction and second suction of the first compression chamber (A) as the rotating shaft rotates. The discharge strokes of the compression chamber B are simultaneously performed so that the compressors balance the forces with each other.

The refrigerant gas discharged sequentially through the discharge ports 173 and 174 flows into the muffler 81 through each discharge port (not shown), and after the noise is reduced, the stator 30 and the rotor 40 are reduced. It discharges through the discharge pipe 12 which penetrates the upper part of the airtight container 10 via the space | interval.

As described above, according to the present invention, by dividing the sealed space of the cylinder to form a plurality of compression chambers, a plurality of strokes are made per one rotation of the rotating shaft, thereby improving the compression efficiency.

In addition, as the suction force and the earth output generated by the compression of the refrigerant are symmetrically generated about the central axis of the cylinder, there is an effect of preventing the generation of vibration due to the imbalance.

Claims (6)

A cylinder assembly having upper and lower bearings coupled to upper and lower portions of the cylinder and the cylinder having a plurality of suction ports and discharge ports to form a closed space; A rotating shaft which penetrates through the cylinder assembly and is rotatably fixed by upper and lower bearings and an eccentric portion is formed in the sealed space; A rolling piston that rotates and revolves inside the sealed space in association with the eccentric portion of the rotating shaft; A plurality of vanes are partitioned and partitioned in a sealed space so that the refrigerant sucked into each suction port is compressed and discharged to each discharge port by inserting and fixing the linear piston in a radial direction of the cylinder body so that one end thereof is in line contact with the rolling piston. Hermetic compressor rotary compressor, characterized in that comprises a. The method of claim 1, The cylinder is a hermetic rotary compressor, characterized in that the suction port is formed on one side of each vane and each discharge port is formed on the other side. The method of claim 2, Sealed rotary compressor, characterized in that each suction pipe is coupled to communicate with the suction port. The method of claim 1, The upper bearing is a closed rotary compressor, characterized in that the discharge port is in communication with each discharge port is provided The method of claim 4, wherein Closed rotary compressor characterized in that the discharge port is provided with each discharge valve for opening and closing at a set pressure or more. The method of claim 2, The suction pipe is a sealed rotary compressor, characterized in that each accumulator is provided for separating the gas-liquid state of the incoming refrigerant.