JPH01200087A - Rotary compressor - Google Patents

Abstract

PURPOSE:To cut cost by generating the capacity changed between a vane in a compression chamber by revolving a cylinder part having a nearly elliptical compression chamber and permitting the high pressure gas to be generated without revolving the vane. CONSTITUTION:When a rotor 13 which constitutes a motor is revolved. a cylinder part 20 which has a nearly elliptical compression chamber 21 and housed inside the rotor 13 is revolved around a holder part 17. Therefore, the compression chamber 21 generates the capacity change between a vane 25 which is urged outwardly by a spring 26 and compresses the low pressure gas which is sucked into the compression chamber 21 through a suction hole 31 from an intake pipe 30. The compressed high pressure gas is discharged into a discharge muffler 36 through a discharge valve 35, and opened into a sealed container 11, and then discharged from a discharge pipe 37. With such constitution, the spring 26 having a small spring constant can be utilized, and an inexpensive motor can be adopted.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a rotary compressor used in household air conditioners, refrigerators, and the like.

Conventional technology In recent years, there has been an extremely strong demand for smaller and lighter compressors.

An example of a conventional rotary compressor will be described below with reference to the drawings.

FIG. 3 shows a cross section of a rotary compressor disclosed in Japanese Patent Application Laid-Open No. 61-255291, in which numeral 1 denotes a closed container in which a motor 4 consisting of a stator 2 and a rotor 3 is housed.

A cylinder 5 is fixed to the inner diameter of the rotor 3 and forms a compression chamber 6. Reference numeral 7 denotes a cam portion formed on a fixed shaft (not shown) and has an elliptical cross-sectional shape. 8 is vane, 9
By pressing the bay 78 against the cam portion 7 with a spring, the compression chamber 6 is partitioned into high and low pressure sides. 1o is the suction hole,
11 is a suction port communicating with the suction hole 1o and the compression chamber 6;
2 is a discharge port.

In the above configuration, does the cylinder 5 rotate as the @1 trochanter rotates 30 times? do. Since the plate 78 rotates together with the cylinder 6 while being pressed by the cam part 7, the compression chamber 6 is partitioned into a high pressure side and a low pressure side, and the volume of each side changes continuously. Therefore, the low-pressure gas is sucked into the compression chamber 6 from the suction hole 1o through the suction port 11, compressed, and then continuously discharged into the closed container 1 through the discharge port 12.

Problems to be Solved by the Invention However, since the vanes 8 rotate together with the cylinder 6, centrifugal force is generated. This centrifugal force causes the vane 8 to
Because the force is applied in the opposite direction to the force of the spring 9 pressing on the
In addition to the load required to press the vane 8, the load of the spring 9 is required to have a load characteristic corresponding to the centrifugal force. The centrifugal force has a value several times the load required to press the bay 78, especially when the rotation speed is high due to an inverter, etc., and as a result, the spring 9 needs to be large. Further, when starting the rotary compressor, a large starting torque is required to overcome the load of the spring 9, which inevitably increases the cost of the motor 4.

In view of the above-mentioned problems, the present invention provides a rotary compressor that is inexpensive and more rational.

Means for Solving the Problems To this end, the rotary compressor of the present invention includes a motor consisting of a stator and a rotor, a shaft fixed to the sealed container, and a motor formed concentrically with the shaft, in a sealed container. a holder part having a substantially radial groove; a cylinder part housed inside the rotor and having a substantially elliptical compression chamber; both sides of the cylinder part hermetically closed; a side plate rotatably held with respect to the shaft; a vane that is slidably and loosely fitted into the groove of the holder portion and partitions the compression chamber into a high pressure side and a low pressure side; It is equipped with a spring that presses it.

Operation According to the above configuration of the present invention, since the vane does not rotate and no centrifugal force is generated, the spring only needs to have a load necessary to press the vane into the compression chamber.

EXAMPLES Hereinafter, examples of the present invention will be described with reference to the drawings. In FIGS. 1 and 2, reference numeral 11 denotes a closed container that houses a motor 14 consisting of a stator 121 and a rotor 13. 16 is fixed to the closed container 11 by a shaft. A holder portion 17 is formed concentrically with the shaft 16 and has a substantially radial groove portion 18. A cylinder portion 20 is housed inside the rotor 13, has a substantially elliptical shape concentric with the rotation center, and has a compression chamber 21.

A vane 26 is slidably fitted into the groove 18. 26 is a spring that presses the vane 26 inside the compression chamber 21. A side plate 27 hermetically closes both sides of the cylinder portion 20 and holds the rotor 3 rotatably relative to the shaft 15. 30 is a suction pipe fixed to the shaft 6. 31 is a suction hole drilled in the shaft 16; 32 is a compression chamber 21 and suction hole 3;
This is an inlet port that communicates with 1. 35 is discharged pulp and is formed in the holder section. A discharge muffler 36 is formed on the side grate 27. 37 is a discharge pipe fixed to the closed container 11.

In the above configuration, as the rotor 13 rotates, the cylinder section 20 rotates, and the compression chamber 21, which has a substantially elliptical shape and is concentric with the center of rotation, rotates with the rotation of the holder section 17. The compression chamber 21 is partitioned into a high-pressure side and a low-pressure side by a vane 26 pressed by a spring 26, and the volume of each side changes continuously.

Therefore, the low-pressure gas is drawn from the suction pipe 30 through the suction hole 31 and into the compression chamber 21 via the suction port 32, where it is compressed. The compressed high-pressure gas is discharged into the discharge muffler 36 through the discharge valve 35, released into the closed container '1, and then discharged through the discharge pipe 37.

Therefore, since the vane 25 does not rotate and no centrifugal force is generated, the spring 26 moves the vane 726 into the compression chamber.
1. Since it is sufficient to have the load necessary to press the spring inward, it can be constructed from an extremely inexpensive coil spring or the like. In addition, since the load of the spring 26 is small, the starting torque of the motor 4 can be kept very small.
It is possible to use an inexpensive motor. Furthermore, since the compression chamber is formed concentrically with respect to the rotation center, there is no unbalance component with respect to rotation! d is extremely small.

Effects of the Invention As described above, the present invention includes a motor consisting of a stator and a rotor in a closed container, a shaft fixed to the sealed container, and a structural part formed concentrically with the shaft and extending in a substantially radial direction. a holder portion having a holder portion;
A cylinder part having a compression chamber having a substantially elliptical shape, a side plate that airtightly closes both sides of the cylinder part and rotatably holds the rotor with respect to the shaft, and a structure of the holder part. A vane that is slidably fitted loosely into the compression chamber and partitions the compression chamber into a high-pressure side and a low-pressure side, and a spring that presses the vane inside the compression chamber enables low-cost and rational rotary compression. machine can be realized.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the rotary compressor of the present invention, and Fig. 2 is a sectional view of the rotary compressor of the present invention.
The top view of the figure and FIG. 3 are sectional views of essential parts of a conventional rotary compressor. 11... Airtight container, 12... Stator,
13...Rotor, 14...Motor, 1
6... Shaft, 17... Holder part, 18... Groove part, 20... Cylinder part, 21... Compression chamber, 25... ...Vane, 26...Spring, 27...Side plate. Name of agent: Patent attorney Toshio Nakao and 1 other person11
- Confinement device 5 12 - National constant 13 - Rotor 4 - Motor I5 - Shaft 17 - Holder section 20 - Cylinder part 25 - Vane 26... - Supzo section 27 - Side plate Fig. 1

Claims (1)

[Claims] A motor consisting of a stator and a rotor is placed in a sealed container, a shaft is fixed to the sealed container, a holder part is formed concentrically with the shaft and has a substantially radial groove part, and a holder part is provided inside the rotor. a cylinder portion that is housed and has a substantially elliptical compression chamber; a side plate that airtightly closes both sides of the cylinder portion and rotatably holds the rotor with respect to the shaft; and the holder. A rotary compressor comprising: a vane that is slidably fitted into a groove of the compressor to partition the compression chamber into a high-pressure side and a low-pressure side; and a spring that presses the vane toward the inside of the compression chamber.