JPS62284985A - Rotary compressor - Google Patents

Abstract

PURPOSE:To contrive to make compact by rotating a lower bearing, a rotor and an upper bearing connected to a permanent magnet and enclosing a space to a piston part with a vane and compressing refrigerant gas by the volume change. CONSTITUTION:A permanent magnet 11 has a hollow cylindrical shape which has height larger than the difference between an outside diameter and an inside diameter and is fixed to a lower bearing 10. By the electricity application to a coil 12, the permanent magnet 11, the lower bearing 10, a rotor 6 and an upper bearing 7 connected to this rotate. And refrigerant gas is sucked into a space of a piston part 2 through a suction port 3 and compressed by the volume change caused by the rotation of a vane. Accordingly, a driving part can be provided at the periphery of a compression part and it is made possible to make compact.

Description

3. Detailed Description of the Invention Field of Industrial Application The present invention relates to a rotary compressor for compressing fluorocarbon-based refrigerant gas, such as in an air conditioner using a heat pump.

BACKGROUND ART Conventionally, rotary compressors have been constructed by connecting an electric motor in a sealed housing and a rolling piston type or vane type compression section that is drivingly connected to the electric motor, and the compression section is driven by the electric motor. There is a type of refrigerant that sucks fluorocarbon-based refrigerant into the housing, compresses it to high pressure in a compression section, and discharges it outside the housing.

Problems to be Solved by the Invention However, in the conventional compressor, the electric motor of the driving part and the compression part are provided separately in the axial direction, so it is difficult to downsize the compressor.

The present invention solves these conventional problems and aims to reduce the size of the compressor by providing a drive section on the outer periphery of the compression section.

Means for Solving the Problems - In order to solve the above problems, the rotary compressor of the present invention includes a shaft having a suction port in the axial direction, and a suction port of the shaft that is larger than the shaft diameter and eccentric. A fixed shaft integrally comprising a piston portion having a port communicating with the piston in the radial direction, a vane provided so as to be retractable,
A rotor having a groove in the vane, an upper bearing having a discharge port, a lower bearing, a permanent magnet having a hollow cylindrical shape having a height greater than the difference in outer and inner diameters and fixed to the lower bearing, and rotating around the outer periphery of the permanent magnet. The upper bearing, the rotor, and the lower bearing are sequentially connected to form a rotatable structure, and the space between the rotor, the bearing, the lower bearing, and the piston portion is surrounded by the vane to change the volume. It has a compression configuration, and the permanent magnet and the coil, which serve as a driving part, are provided around the rotor to achieve a compact configuration, and the magnetic field force is increased due to the expansion of the surface area between the coil and the permanent magnet, thereby reducing the torque shortage. This also eliminates the worry.

According to the above-described configuration, the present invention drives a permanent magnet by energizing the coil, rotates the lower bearing, rotor, and upper bearing connected to the permanent magnet, and rotates the lower bearing, rotor, upper bearing, and piston. The vane encloses the space between the compressor and the compressor, and by changing the volume, low-pressure suction refrigerant gas is sucked into the compression chamber from the suction port, becomes high-pressure gas, and is discharged from the discharge port of the upper bearing into the space inside the housing. .

Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings.

In FIGS. 1 and 2, 1 is a shaft, and 2 is a piston portion, which is larger in diameter than the shaft 1 and whose center is offset from the shaft center. Reference numeral 3 denotes a suction port, which passes through the shaft 1 in the axial direction and the piston portion 2 in the radial direction. 4 is a fixed axis;
The shaft 1 and the piston portion 2 are integrally constructed.

5 is a vane, and 6 is a rotor, which has a rotatable concentric cylindrical shape and has the groove of the vane 5.

7 is an upper bearing and has a discharge port 8. Reference numeral 9 denotes a discharge valve, which is attached to the upper bearing 7.

10 is the lower bearing. Further, the rotor 6, the upper bearing 7, the discharge valve 9, and the lower bearing 10 are connected to each other so as to be rotatable about the axis of the shaft 1. 11
is a permanent magnet, which has a hollow cylindrical shape with a height greater than the difference between the outer diameter and the inner diameter, and is fixed to the lower bearing 10. Reference numeral 12 denotes a coil, which is provided on the outer periphery of the lower bearing 10. 13 is a housing.

In the above configuration, the operation will be explained next.

When the coil 12 is energized, the permanent magnet 11 rotates due to the magnetic field, thereby causing the lower bearing 10 connected to the permanent magnet 11, the rotor 6, the upper bearing 7, and the discharge valve 9 to rotate. . The low-pressure refrigerant gas passes through the suction port 3 provided in the shaft 1 and the piston portion 2, and is sucked into the space between the rotor 6, the upper bearing 7, the lower bearing 10, and the piston portion 2. be done. Here, the refrigerant gas is compressed and becomes high pressure due to the volume change caused by the rotation of the vane 5 as the rotor 6 rotates, and the discharge valve 9 is opened and the discharge port 8 provided in the upper bearing is connected to the housing. It is discharged into the internal space of 14.

Effects of the Invention As described above, the rotary compressor of the present invention provides the following effects.

A fixed shaft integrally comprising a shaft having a suction port in the axial direction, a piston part that is larger than the diameter of the shaft and eccentric, and has a port in the radial direction that communicates with the suction port of the shaft, a vane that is retractable, and a vane that is retractable. A rotor with a groove, an upper bearing with a discharge port, a lower bearing, a permanent magnet fixed to the lower bearing, which has a hollow cylindrical shape with a height greater than the difference in outer and inner diameters, and a non-rotating coil around the outer circumference of the permanent magnet. By providing this, a permanent magnet and a coil serving as a driving part are provided around a rotor that rotates to constitute a compression part, so that size reduction can be achieved. or,
In order to increase torque, we have expanded the surface area of the coil and permanent magnet, so there is no need to worry about insufficient torque.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a rotary compressor according to an embodiment of the present invention;
The figure is an exploded perspective view of the rotary compressor. 1...Shaft, 2...Piston part,
a...Suction port, 4...Fixed shaft, 5
...Vane, 6...Rotor, 7...
...Upper bearing, 8...Discharge port, 9...
...Discharge valve, 1o...Lower bearing, 11...
...Permanent magnet, 12... Coil, 13...
··housing. Name of agent: Patent attorney Toshio Nakao and 1 other person6-
--4-Goo 8--One stroke, output 12--Coil Fig. 1

Claims (1)

[Claims] A fixed shaft integrally comprising a shaft having a suction port in the axial direction, a piston portion having a port in the radial direction that is larger than the diameter of the shaft and eccentric and communicates with the suction port of the shaft, a vane provided so as to be retractable; A rotatable rotor having a vane groove, an upper bearing having a discharge port, a lower bearing, a permanent magnet fixed to the lower bearing and having a hollow cylindrical shape with a height greater than the difference between an outer diameter and an inner diameter.
A non-rotating coil is provided on the outer periphery of the permanent magnet, and the upper bearing, the rotor, and the lower bearing are sequentially connected to form a rotatable structure, and the space between the rotor, the upper bearing, the lower bearing, and the piston portion is A rotary compressor configured to change enclosure volume using the vane.