JPH05141374A - Closed type compressor - Google Patents

Abstract

PURPOSE:To improve assembling capability by forming a guide for regulating the opening of an on-off valve integrally with a partition plate with which first and second recessed parts are closed. CONSTITUTION:A lower frame body 16 composed of a bearing 19 and a flange 20 is attached to the end surface of a cylinder 12. A first recessed part 24 in which a delivery valve 23 is contained and a second recessed part 25 in which an on-off valve 29 is contained are formed in the flange 20 of the lower frame body. A guide 38 by which the opening of the on-off valve 29 is regulated is integrally formed to a partition plate 37 with which the first and second recessed parts are closed. This constitution prevents production of the strain in the bearing 19 owing to mounting of the guide 38.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hermetic compressor,
In particular, the present invention relates to a hermetic compressor in which a discharge chamber and a capacity control chamber are formed in the same frame.

[0002]

2. Description of the Related Art A conventional hermetic type compressor is, for example, Japanese Utility Model Sho 63
-43429, it is comprised as described. Here, a conventional example will be described with reference to this publication. 3 to 4, 50 is a closed container, 51 is a discharge pipe,
52 is a condenser, 53 is a capillary tube, 54 is an evaporator, 55 is a suction pipe, 56 is a discharge pressure introduction pipe, 57 and 58 are bypass gas discharge pipes, 59 and 60 are solenoid valves, 61 is a discharge valve, and 62 is a discharge valve. A discharge chamber, 63 is a suction chamber, 64 is an opening (gas passage) for bypassing gas during compression, 65 is an opening / closing valve for opening and closing the opening, 66 is a bypass gas reservoir, 67 is a cylinder, and 68 is The valve retainer 69 is a lower frame, and when controlling the capacity of the hermetic compressor, compression is performed between the suction chamber 63 and the discharge chamber 62 of the cylinder 67 in order to prevent a decrease in efficiency during capacity control. An opening 64 for releasing gas in the middle to the low pressure side is provided, a valve 65 (reed valve, plunger-free valve, etc.) for opening / closing this opening is provided, and solenoid valves 59, 60 for controlling this valve are provided. Provided outside the compressor, these Controls pilot pressure by opening and closing of the solenoid valve, opening and closing the valve 65 of the closing portion 64, so as to control the capacity of the compressor.

Lower frame 6 for closing the opening of the cylinder 67
Two annular walls 70 and 71 are concentrically provided on the shaft 9. An annular groove is formed in the lower frame 69 by these annular walls. 72 is a lid that closes the annular groove, and 73 is a partition that divides the annular groove into two. With this partition wall, one of the annular grooves serves as a bypass gas reservoir 66 for capacity control and the other serves as a discharge chamber 62.

In the hermetic compressor of this structure, the lower frame 69
By forming the bypass gas reservoir 66 and the discharge chamber 62 by the annular walls 70 and 71 and the partition wall 73 provided in the above, it is not necessary to provide the discharge valve 61 in the upper frame or the cylinder 67, and the compressor can be miniaturized. I have to.

[0005]

However, since the valve retainer 68 for restricting the opening degree of the valve 65 for opening and closing the opening 64 of the bypass gas reservoir 66 is press-fitted and attached to the lower frame body 69, this lower frame is mounted. There was a problem that the body was deformed due to strain when pressed.

The present invention solves the above problems,
Hermetic compression in which a partition plate that closes the first recess and the second recess formed in the frame body and a component that restricts the valve opening of the capacity control valve device provided in one recess are integrally formed The purpose is to provide a machine.

[0007]

The present invention comprises a closed container,
A first recess for accommodating a discharge valve in the frame, and a capacity control device, which comprises a compression element housed in the container, the compression element is composed of a cylinder and a frame body for closing an opening of the cylinder; A second recess for accommodating the valve device is provided
The dent and the second dent are closed by a partition plate integrally formed with a component for regulating the valve opening of the capacity control valve device.

[0008]

The present invention is constructed as described above,
The partition plate provided integrally with the component for regulating the valve opening degree of the capacity control valve device housed in the second recess forms the first recess and the second recess.
Of the capacity control valve device can be attached without pressing into the second recess.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the embodiments shown in the drawings.

FIG. 1 is a sectional view of a rotary compressor showing an embodiment of the present invention. FIG. 2 is a plan view of the lower frame body.

Reference numeral 1 is a rotary compressor, 2 is a condenser, 3 is a capillary tube, 4 is an evaporator, and these are connected by piping to form a refrigerant circuit.

The rotary compressor 1 comprises a closed container 6, an electric element 7 housed in the upper part of the container, and a rotary compression element 8 housed in the lower part of the container. The electric element 7 includes a stator 9 and a rotor 10 arranged inside the stator.
And the rotary shaft 1 inserted and attached in the center of this rotor
It is composed of 1 and 1.

The rotary compression element 8 includes a cylinder 12, a roller 14 which is rotated along an inner wall of the cylinder 12 by an eccentric portion 13 of a rotary shaft 11, and an upper frame body 15 and a lower frame body 16 which are attached to an end surface of the cylinder 12. It consists of and.

The upper frame body 15 is formed of a bearing 17 for supporting the rotary shaft 11 and a flange 18 for sealing the opening of the cylinder 12. The lower frame 16 is formed of a bearing 19 that supports the rotating shaft 11 and a flange 20 that seals the opening of the cylinder 12.

A cup muffler 21 is attached to the upper frame 15. The inside of the cup muffler and the inside of the cylinder 12 are communicated with each other by a first discharge port 22 provided on a flange 18 of the upper frame body 15. The first discharge port is opened and closed by a discharge valve 23.

The flange 20 of the lower frame 15 is provided with a first recess 24 and a second recess 25. Two
Reference numeral 6 denotes a second discharge port that connects the inside of the cylinder 12 and the inside of the first recess 24, and this discharge port is opened and closed by a discharge valve 27 mounted in the first recess 24. Reference numeral 28 denotes a bypass hole that connects the inside of the cylinder 12 and the inside of the second recess 25, and this bypass hole is opened and closed by an opening / closing valve 29.

The inside of the first recess 24 and the inside of the cup muffler 21 communicate with each other through a communication hole 30 provided in the cylinder 12. The cup muffler 21 has a discharge port 31 for discharging the refrigerant discharged into the muffler and the first recess 24 into the closed container 6.
Is provided.

A bypass pipe 32 is connected to the lower frame 16 so as to pass through the closed container 6. This bypass pipe is second
Communicates with the inside of the recess 25. The bypass pipe 32 is connected to the inlet side of the condenser 2 via the first electromagnetic valve 33, and the evaporator 4 via the second electromagnetic valve 35.
The low pressure pipe 36 connected to the outlet side of the is joined and connected.

A partition plate 37 is attached to the lower frame 16 so as to seal the first recess 24 and the second recess 25,
A guide 38 for restricting the opening degree of the opening / closing valve 29 of the second recess 25 is integrally formed on the partition plate.

A discharge pipe 39 is provided on the upper wall of the closed container 6, and this discharge pipe is connected to the condenser 2. Reference numeral 40 is a suction pipe connected to the rotary compression element 8, and this suction pipe is connected to the evaporator 4.

In the hermetic compressor thus constructed, the refrigerant flowing into the cylinder 12 is compressed by the roller 14 and is discharged into the cup muffler 21 by opening the discharge valve 23 from the first discharge port 22. And second
The discharge valve 27 is opened from the discharge port 26 to discharge into the first recess 24. The refrigerant in the first recess flows into the cup muffler 21 through the communication hole 30 of the cylinder 12, and is discharged from the discharge port 31 into the closed container 6 together with the refrigerant in the cab muffler. This refrigerant flows between the stator 9 and the rotor 10 of the electric element 7 and is discharged from the discharge pipe 39 to the external refrigerant circuit. The discharged refrigerant is condensed and liquefied by the condenser 2 and depressurized by the capillary tube 3. This depressurized refrigerant performs a cooling function which is vaporized in the evaporator 4. This vaporized refrigerant returns from the suction pipe 40 to the rotary compression element 8 and repeats the same cycle.

The first solenoid valve 33 is opened and the second solenoid valve 35 is opened.
Is closed, part of the high-pressure refrigerant flowing from the discharge pipe 39 to the condenser 2 is guided from the high-pressure pipe 34 to the bypass pipe 32 and flows into the second recess 25.
Block 8 Then, all the refrigerant flowing into the cylinder 12 from the suction pipe 40, the first and second output ports 22,
It is discharged from No. 26, and the rotary compressor 1 can perform high load operation.

The first solenoid valve 33 is closed and the second solenoid valve 35 is
When is open, the inside of the second recess 25 becomes the same as the low pressure inside the suction pipe 40 via the bypass pipe 32 and the low pressure pipe 36. Then, the refrigerant that has flowed into the cylinder 12 from the suction pipe 40 and is in the middle of compression inside the cylinder opens the opening / closing valve 29 from the bypass hole 28 and flows into the second recess 25, and then from the bypass pipe 32 to the low pressure pipe 36. The amount of the refrigerant that is returned to the suction pipe 40 via the cylinder and is compressed in the cylinder 12 is reduced so that the rotary compressor 1 can perform a light load operation.

Open / close valve 29 housed in the second recess 25.
The guide 38 for restricting the opening degree of is formed integrally with the partition plate 37 that closes the first recess 24 and the second recess 25, so that it is not necessary to press-fit the second recess 25 and mount it. The distortion of the bearing 19 of the lower frame body 16 due to the above is prevented. Further, the partition plate 37 and the guide 38 are integrally formed so that the number of parts can be reduced even if the capacity control valve device and the discharge chamber are separately formed.

[0025]

As described above, according to the present invention, the closed container and the compression element housed in the container are provided, and the compression element is composed of the cylinder and the frame body for closing the opening of the cylinder. Then, the frame is provided with a first recess for accommodating the discharge valve and a second recess for accommodating the capacity control valve device, and the first recess and the second recess are provided in the capacity control valve device. Since the partition plate formed integrally with the component that regulates the valve opening degree is used, the number of parts can be reduced even if the capacity control valve device and the discharge chamber are formed independently. A component that regulates the valve opening is loosely arranged in the second recess, and it is possible to prevent the component from being distorted by the component.

[Brief description of drawings]

FIG. 1 is a sectional view of a rotary compressor showing an embodiment of the present invention.

FIG. 2 is a plan view of a lower frame body of the present invention.

FIG. 3 is a sectional view of a conventional rotary compressor.

FIG. 4 is a plan view of a conventional lower frame body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 rotary compressor 6 hermetic container 8 rotary compression element 12 cylinder 15 upper frame 16 lower frame 24 first recess 25 second recess 27 discharge valve 29 opening / closing valve 37 partition plate 38 guide

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Hitomi Takagi 2-18 Keihan Hondori, Moriguchi City, Osaka Sanyo Electric Co., Ltd.

Claims (1)

[Claims] 1. A hermetic compressor comprising a hermetic container and a compression element housed in the container, the compression element having a cylinder and a frame for closing an opening of the cylinder. Is provided with a first recess for accommodating the discharge valve and a second recess for accommodating the capacity control valve device. The first recess and the second recess are the valve opening of the capacity control valve device. A hermetic compressor characterized in that it is closed by a partition plate formed integrally with a component that regulates the above.