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Scrawl compressor

A compressor and scroll-type technology, applied in the field of scroll compressors, can solve problems such as inequality, pressure balance damage, and compressor internal structure damage, and achieve the effects of easy installation, improved compression efficiency, and high reliability

Inactive Publication Date: 2005-05-11
MITSUBISHI HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0028] However, in the above-mentioned scroll compressor, the volumes of the two compression chambers facing each other at the center of the scroll compression mechanism are not equal during the compression process.
Therefore, during actual driving, the pressure balance between the two compression chambers is destroyed, and in the worst case, the internal structure of the compressor is destroyed

Method used

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Examples

Experimental program
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Embodiment Construction

[0161] figure 1 The structure of the back pressure type scroll compressor as the first embodiment of the present invention is shown.

[0162] The scroll compressor is composed of a sealed casing 11, a discharge cover 2 that divides the inside of the casing 11 into a high-pressure chamber HR and a low-pressure chamber LR, a frame 5, a suction pipe 6, a discharge pipe 7, a motor 8, and a rotating shaft. 16. The rotation prevention mechanism 15 is composed of a fixed scroll member 12 and an orbiting scroll member 13 engaged with the fixed scroll member 12 .

[0163] Such as figure 2 As shown, the fixed scroll member 12 is formed by erecting a scroll-shaped wall 12b on one surface of an end plate 12a. The orbiting scroll 13 is configured by erecting a spiral wall 13 b on one side surface of an end plate 13 a similarly to the fixed scroll 12 . The shape of the wall body 13b is substantially the same as the shape of the wall body 12b on the side of the fixed scroll member 12 . ...

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PUM

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Abstract

The scroll compressor of the present invention includes a fixed scroll and an orbiting scroll. The end plates of the fixed scroll member and the orbiting scroll member are made as a stepped portion with a large height at the center side and a small height at the outer peripheral end side of the scroll along the wall body, and the upper edge of the wall body corresponds to the stepped portion of the end plate made into a step shape. A gap is respectively provided between the upper edge of the wall body and the end plate, and the height of the gap at room temperature is larger than that in the running state. The stepped portion is provided at a position that exceeds the advancing angle π (rad) from the outer peripheral end along the scroll direction. In addition, a recess is formed on the end plate of the fixed scroll, and a discharge valve is provided in the recess. A plate movable in the direction of the rotary shaft of the orbiting scroll is provided, and a pressing mechanism for pressing the plate is provided. In addition, the shape of the connecting wall surface connecting the adjacent parts on one side of each end plate is determined by the envelope of the turning track of the connecting edge connecting the adjacent parts of the upper edges. In addition, a communication path is provided to communicate the two compression chambers formed by the contact between the connection edge and the connection wall surface.

Description

technical field [0001] The present invention relates to a scroll compressor provided in an air conditioner or a refrigerator. Background technique [0002] Scroll compressors combine the scroll-shaped walls of the fixed scroll and the orbiting scroll to make the orbiting scroll orbit relative to the fixed scroll and gradually reduce the volume of the compression chamber formed between the walls Small, the fluid in the compression chamber is compressed. [0003] The design compression ratio of a scroll compressor is the maximum volume of the compression chamber (the volume when the walls mesh with each other to form the compression chamber) relative to the minimum volume of the compression chamber (when the meshing between the walls is released and the compression chamber is about to disappear. The ratio of the volume) can be represented by the following formula (I). [0004] Vi={A(θsuc)·L} / {A(θtop)·L}=A(θsuc) / A(θtop)…(I) [0005] In the formula (I), A(θ) is a function rep...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C18/02F04C29/12
CPCF04C18/0276F04C29/126F04C18/02
Inventor 伊藤隆英竹内真实山崎浩丸岩保治永户幸夫笹川千贺子松田进
Owner MITSUBISHI HEAVY IND LTD