JPS6299693A - Rotary compressor - Google Patents

Abstract

PURPOSE:To prevent a high frequency sound generated in a closed vessel from leaking outside a cylindrical part by providing a dimpled part on the cylindrical part of the closed vessel excepting every part to which the closed vessel, a motor and rotary compressing device are fixed in contact with it to improve the rigidity of the cylindrical part. CONSTITUTION:A closed vessel 1 is composed of a cylindrical part 1a, and covers 1b, 1c tightly welded on both its end openings, and accommodates a motor M and a rotary compressor C driven by the motor M. In the cylindrical part 1a, an inverse U letter shaped dimpled part D projecting outward is formed between the said cover 1c and a part to which the motor M is fixed in contact with it. A high frequency sound of noises generated during the operation of the rotary compressor is specially emitted outward at the poorly rigid rotation of the above cylindrical part 1a, but the formation of the said dimpled part D strengthens the rigidity of the cylindrical part 1a, and lowers a noise level to extremely reduce the volume of the emitted sound.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is directed to a refrigerant compression device C having a rotary compression mechanism used in a refrigeration device such as a refrigerator or an air conditioner, which is fixed in contact with a cylindrical portion 1a. lid body 1b,
Welding 1c.

Problems to be Solved by the Invention However, with such a shape, the rigidity of the cylindrical portion 1a is insufficient in areas other than the portions of the cylindrical portion 1a where the motor M and the rotary compression device C are in contact with each other. High frequency range (especially 4KHz to 10KH) generated by the operation of device C
z) had the disadvantage of easily transmitting noise to the outside.

Therefore, the present invention was made in view of the above points, and by improving the cylindrical part that houses the motor and rotary compressor and increasing the rigidity of the parts other than the parts where the motor and rotary compressor come into contact, it is possible to The purpose is to reduce the noise level at frequencies up to 10KHz).

Means for Solving the Problems In view of the above-mentioned problems, the present invention provides a dimpled portion on the cylindrical portion other than the portion where the closed container, the motor, and the rotary compression device are fixed in contact with each other.

As a result, the high frequency range generated within the sealed container is prevented from leaking to the outside through the cylindrical portion whose rigidity is increased by the dimpled portion.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings, and components that are the same as those of the prior art will be designated by the same reference numerals and detailed explanations thereof will be omitted. In FIG. 1, reference numeral 1 denotes an airtight container, which is made up of a cylindrical portion 1d and lids 1b and 1C welded to openings at both ends of the container. A rotary compression device C driven by M is housed. Further, the cylindrical portion 1a has an inverted U-shaped dimpled portion projecting outward between the lid 1C and a portion to which the motor M is fixedly contacted. Reference numeral 4 indicates oil, which is collected at the bottom of the sealed container 1.

Also, the rotary compression device C includes a cylinder 5, and this cylinder 5
A compression chamber 8 is formed by the motor side plate 6 and the non-motor side plate 7 that cover the motor side. A crankshaft 9 is press-fitted into the rotor 3, and has an eccentric portion 1o located within the cylinder 6. A roller piston 11 is driven by the eccentric portion 10 and is inscribed in the compression chamber 8 . 12 is a vane and a spring (not shown) is connected to the cylinder 5.
The compression chamber 8 is compressed by being pressed against the roller piston 11 at
is divided into high pressure side and low pressure side. Reference numeral 13 denotes a suction pipe, one end of which is press-fitted into the plate 7 on the opposite side of the motor, and the other end opened to the outside of the closed container 1. 14 is a discharge pipe which is welded to the closed container 1. 16 is a discharge valve provided on the plate 7 on the opposite side to the motor; 16 is a cover forming a discharge muffler chamber 17, and has a discharge hole 18.

In this configuration, the rotation of the rotor 3 is transmitted to the crankshaft 9, and the roller piston 11 fitted in the eccentric portion 10 rotates eccentrically in the compression chamber 8, and the vane 12 is pressed against the roller piston 11. As a result, the inside of the compression chamber 8 is partitioned into a high-pressure side and a low-pressure side, so that the gas sucked in through the suction pipe 13 is continuously compressed, released into the closed container through the discharge hole 18, and then released outside the closed container through the discharge pipe. is discharged. When performing such an operation, electromagnetic noise from the motor M, sliding noise from the rotary compressor C, and discharge noise when the compressed gas passes through the discharge hole 18 are generated.

Among these sounds, high frequency range (especially 4KHz to 10KHz)
) Sound is particularly transmitted and radiated from the parts of the cylindrical part where the rigidity is weak.
Since the frequency-noise characteristics of the area between (shown by the solid line Therefore, in the above configuration, the rigidity of the processed portion is increased, and the noise level in the high frequency range (especially 4 KHz to 10 KHz) can be reduced.

Effects of the Invention As is clear from the above explanation, the present invention has the advantage of increasing the rigidity of the cylindrical part other than the part where the motor and the rotary compression device are in contact with each other by dimple processing. ) has the effect of lowering the noise level.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a rotary compressor showing an embodiment of the present invention, and FIG. 2 is a frequency diagram showing the noise of a conventional rotary compressor and the noise of a rotary compressor of an embodiment of the present invention. The noise characteristic diagram, FIG. 3, is a sectional view of a conventional rotary compressor. 1... Airtight container, M... Motor, C.
...Rotary compression device, D...Dimple processing section. Name of agent: Patent attorney Toshio Nakao and one other person L-
Figure 2 FKEQ (JENCY ()lzJ Figure 3)

Claims (1)

[Claims] An airtight container comprising a cylindrical portion and a lid that closes an opening thereof, a motor disposed within the airtight container, a rotary compression device driven by the motor, and a contact portion between the motor and the compression device of the airtight container. A rotary compressor consisting of a dimpled section formed on the wall surface except for.