JPS6030487A - Rotary compressor - Google Patents

Abstract

PURPOSE:To suppress noise by allowing the outside surface of casing of a compressor body to attract two semi-cylindrical permanent magnets to function as a damper, and thereby suppressing possible torsional vibration. CONSTITUTION:Outside surface of the casing 20 of a compressor body shall attract two semi-cylindrical permanent magnets 22, 23 to function as a damper. That is, the bond between these magnets 22, 23 and the casing 20 is only due to magnetic force. Accordingly, even when the casing 20 begins torsional vibration, the magnets 22, 23 are willing to retain their original positions owing to the inertia force deriving from their own gravities, without making followup motion to said torsional vibration, but sliding on the outside surface of the casing 20. Thereby a frictional force is generated at the attraction parts between casing 20 and magnets 22, 23 because of said sliding to bring about the torsional vibration. Thus noise likely otherwise generated by such torsional vibration can be suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a rotary compressor capable of reducing noise.

[Technical background of the invention and its problems]

Rotary compressors have fewer parts and are easier to downsize than reciprocating compressors that generate pressure m through reciprocating movement of pistons, so they are widely used in refrigerators, air conditioners, and the like.

By the way, as shown in FIG. 1, a conventional rotary compressor usually has a rotary compression mechanism 7 and a motor that rotationally drives it coaxially installed inside a cylindrical container 1 with both ends closed. It is arranged and configured.

The rotary compression mechanism l is fixed to the inner peripheral surface of the container 1 in a manner that divides the inside of the container 1 into two in the axial direction, and has a disk-shaped space P in the center.
A cylinder 4 having a cylinder 4, a shaft 5 eccentrically mounted in the space P, a compression tool 6 mounted on the outer periphery of the shaft 5, and a cylinder 4 that supports both ends of the shaft 5 and closes the space p4. It is composed of bearings 8 and 9 that form a compression chamber 2.

On the other hand, the motor is composed of a stator 1 fixed to the inner circumferential surface of the container I, and a rotor 12 rotatably mounted inside the stator 1. Supported by In addition, in the figure, 13 indicates a suction pipe, 14 indicates a suction port, 15 indicates a discharge port, and 1
6 indicates a discharge pipe.

However, in the conventional rotary compressor configured in this way, the rotational compression mechanism and the suction to compression
When rotational torque fluctuation occurs during the discharge process, the container 1
The problem was that torsional vibrations were excited, which caused relatively large noise.

[Purpose of the invention]

The present invention has been made in view of such problems.
The purpose is to provide a rotary compressor that can prevent torsional vibration of the container without complicating the structure, thereby reducing noise.

[Summary of the invention]

The present invention provides a compressor main body in which a rotary compression mechanism and a motor are coaxially disposed inside the container.
Alternatively, it is characterized in that a plurality of permanent magnets are attracted to each other, and these permanent magnets are made to function as a Danno 4-.

〔Effect of the invention〕

According to the present invention, the permanent magnet damper is supported on the outer periphery of the container of the main body only by magnetic coupling force. For this reason, when the container attempts to cause torsional vibration due to rotational torque fluctuations, a relative movement occurs between the Danno f- and the container. This friction causes vibration energy to be converted into heat energy and absorbed. therefore,
Since torsional vibrations are suppressed, the generation of noise is also suppressed◇ In this case, the structure is very simple, just attaching a permanent magnet to the outer periphery of the container, so manufacturing and Assembly can also be facilitated.

In addition, the permanent magnet attracted to the outer circumferential surface of the container can function as a sound insulating material that blocks noise generated inside the container, and further noise reduction can be achieved.

[Embodiments of the invention]

Hereinafter, details of the present invention will be explained based on illustrated embodiments.

Note that in FIGS. 2 and 3, the same parts as in FIG. 1 are given the same reference numerals, and detailed explanations will be omitted.

The rotary compressor of this embodiment differs from the conventional example in that the container 2
0 is made of a magnetic material, and two dampers 22 and 2 made of semi-cylindrical permanent magnets are provided on the outer peripheral surface of the container 20.
3f: This is due to concentric suction and holding.

That is, on the outer circumferential surface of the container 20, there are projecting circumferential walls 25 on the outer circumferential surface corresponding to the position where the cylinder 4 is fixed and on the outer circumferential surface located on the discharge pipe I6 side from the position where the stator 11 of the motor 3 is fixed. ,26 are formed,
Danno 4-22゜23 is formed between these projecting peripheral walls 25 and 26 so that the position in the axial direction is regulated by the projecting peripheral walls 25 and 26.
is installed. The caps 22 and 23 are held together by the strength of the magnetic coupling with the container 20.

With such a configuration, if torsional vibration occurs in the container 20 due to torque fluctuation during operation of the compressor body consisting of the container 20, the rotary compressor, and the motor l, the Danno f-2, 2 and the 23 operates as follows.

That is, the coupling strength between the dampers 22 and 23 and the container 20 is only the magnetic coupling strength as described above. Therefore, when the container 20 causes torsional vibration, the Dan/f-22 and 23 try to maintain their own position without following the one torsional vibration due to the inertial force caused by their own weight, and the container 20 It will slide on the outer peripheral surface. Therefore, frictional force is generated due to sliding between the container 20 and the dampers 22 and 23 at the adhesion portions, and torsional vibrations are suppressed. As a result, the generation of noise caused by torsional vibration is suppressed.

Furthermore, in this case, since the configuration is such that the two dampers are simply attracted to the compressor main body, manufacturing and assembly are extremely simple.

In addition, as in this embodiment, if the structure is such that two semi-cylindrical members are attached to the outer periphery of the container, the Danno 4-
In addition, it is possible to produce a sound effect that blocks the noise generated inside the container, so that the noise can be further reduced.

Note that the present invention is not limited to the embodiments described above. For example, the number of dampers may be at least one. Further, although the entire container is made of a magnetic material, only the portion where the damper is attached may be made of a magnetic material.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing an example of a conventional rotary compressor, FIG. 2 is a longitudinal sectional view of a rotary compressor according to an embodiment of the present invention, and FIG. 3 is a direction in the direction of arrow A in FIG. 2. This is the diagram as seen in the figure. 1.20...Container, mutual...rotary compression mechanism, tank...
・Motor, 4... Cylinder, 5... Shaft, 6... Compression tool, 7... Compression chamber, 8, 9... Bearing, 11...
Stator, 12... Rotor, 13... Suction pipe, I4
...Suction port, 15...Discharge port, I6...Discharge pipe,
22, 23... damper, 25, 26... projecting wall. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] A compressor body consisting of a rotary compression mechanism and a motor for rotationally driving the mechanism arranged coaxially inside a container, and one or more permanent magnets attracted to the outer peripheral surface of the container of the compressor body. A rotary type characterized by comprising a damper.