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Scroll compressor

A scroll compressor and movable scroll technology, which is applied in the field of scroll compressors, can solve the problems of refrigerant leakage, reduction of compression performance, and influence spread, and achieve the effect of restraining position offset and restraining the reduction of compression performance.

Active Publication Date: 2019-12-06
DAIKIN IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the position of the seal point of the arc portion is shifted due to thermal expansion of the arc portion, the influence will affect the entire wrap such as the wrap portion, and the positions of the plurality of seal points will shift.
This becomes the cause of the occurrence of refrigerant leakage resulting in a decrease in compression performance
When using a type of refrigerant that can reach a high temperature, the thermal expansion of the arc portion becomes larger, so the compression performance may further decrease

Method used

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Experimental program
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Effect test

no. 1 Embodiment approach

[0029] (1) Overall structure

[0030] figure 1 A scroll compressor 10 according to a first embodiment of the present invention is shown. The scroll compressor 10 is mounted on an air conditioner or the like in order to compress a refrigerant that is a fluid. The scroll compressor 10 has a housing 20 , a motor 30 , a crankshaft 35 , a compression mechanism 40 , and frame members 70 , 75 .

[0031] The refrigerant to be compressed by the scroll compressor 10 is, for example, a refrigerant that is relatively likely to have a high temperature and high pressure around the fixed scroll 50 and the movable scroll 60 of the compression mechanism 40 . In other words, the refrigerant to be compressed by the scroll compressor 10 is a refrigerant having a relatively high condensation pressure. Specifically, the refrigerant to be compressed by the scroll compressor 10 is, for example, R32 (R32 alone), a mixed refrigerant containing more than 50% of R32 (such as R410A, R452B, R454B, etc.)...

no. 2 Embodiment approach

[0079] (1) Overall structure

[0080] Figure 8 It is a sectional view along the horizontal plane of the compression mechanism 40A of the scroll compressor 10 according to the second embodiment of the present invention. The compression mechanism 40A differs from the compression mechanism 40 of the first embodiment in that the fixed scroll 52 has a fixed loose portion 59 and the movable scroll 62 has a movable loose portion 69 . The fixed loose portion 59 and the movable loose portion 69 are spiral shaped like the fixed arc portion 58 and the movable arc portion 68 , and are dimensioned to form a large side clearance as will be described later.

[0081] The fixed loose part 59 is located in the end part on the opposite side to the end part where the fixed arc part 58 exists in the fixed scroll 52 . In other words, the fixed arc portion 58 is provided at the central end of the fixed scroll 52 , and the fixed loose portion 59 is provided at the peripheral end of the fixed scrol...

example 2A

[0092] In the second embodiment, the loose portion side clearance GL is defined by the smallest gap among the gaps formed by the movable scroll portion 67 and the fixed loose portion 59 , and the gap formed by the fixed scroll portion 57 and the movable loose portion. 69, and the gap formed by the fixed loose part 59 and the movable loose part 69. Instead, the loose part side gap GL may be defined by the largest gap among these three types of gaps. Alternatively, the loose portion side gap GL may always be defined by any one selected from these three types of gaps.

[0093] According to this configuration, even if the thermal expansion of the loose portion occurs, it is possible to obtain an effect of suppressing a decrease in compressibility, and it is also possible to change design constraints.

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PUM

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Abstract

The present invention provides a scroll compressor. The stationary scroll wrap (52) includes a spiral-shaped stationary spiral section (57) and a circular arc-shaped stationary circular arc section (58). A movable scroll wrap (62) includes a spiral-shaped movable spiral section (67) and a circular arc-shaped movable circular arc section (68). A circular arc section side surface gap (GA) is formedeither between the stationary circular arc section (58) and the movable spiral section (67) or the movable circular arc section (68), or between the movable circular arc section (68) and the stationary spiral section (57) or the stationary circular arc section (58). A spiral section side surface gap (GI) is formed by the stationary spiral section (57) and the movable spiral section (67). The circular arc section side surface gap (GA) is greater than the spiral section side surface gap (GI).

Description

technical field [0001] The present invention relates to scroll compressors. Background technique [0002] In a scroll compressor, a fixed scroll having a spiral wrap and a movable scroll contact each other at a plurality of sealing points to form a compression chamber. Since various parts of the scroll are in contact with fluids of different pressures, they are deformed by the pressure differential. In order not to cause abnormal operation even if such deformation occurs, in the scroll compressor disclosed in Patent Document 1 (Japanese Patent Laid-Open Publication No. 2015-71947), the side clearance between the movable wrap and the fixed wrap is adjusted. The size allows the side clearance to absorb the amount of deformation. [0003] In the wrap, for the purpose of increasing the compression ratio, there is a wrap whose central portion is shaped like an arc instead of a spiral curve. However, if the position of the seal point of the arc portion shifts due to thermal exp...

Claims

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Application Information

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IPC IPC(8): F04C18/02
CPCF04C18/0215F04C2270/17F04C18/0269F04C2210/26F04C2210/268F04C2240/20F04C2240/30
Inventor 村上泰弘水嶋康夫中井亮太
Owner DAIKIN IND LTD
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