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Scroll compressor

A scroll compressor and compression chamber technology, applied in the field of scroll compressors, can solve the problems of increased cost, difficulty in ensuring the sealing performance of coils, and increased number of production steps

Inactive Publication Date: 2006-03-15
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] However, since the roll sheets are formed in a stair shape, there is a problem that it is difficult to ensure the sealing performance between the roll sheets at the stair part, the number of production steps increases, and its cost increases

Method used

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no. 1 approach

[0038] Embodiments of the present invention will be described below with reference to these drawings. The present invention is not limited to these embodiments.

[0039] figure 1It is a cross-sectional view of the scroll compressor according to the first embodiment of the present invention. The orbiting scroll 13 engaged with the fixed scroll 12 is sandwiched between the main bearing member 11 of the crankshaft 4 fixed in the container 1 by welding or shrink fitting and the fixed scroll 12 bolted to the main bearing member 11 , thereby constituting a scroll compressor mechanism 2 . A limited rotation mechanism 14 , such as an Oldham ring, is provided between the orbiting wrap 13 and the main bearing member 11 . The restricting rotation mechanism 14 guides the orbiting scroll 13 so as to prevent the rotation of the orbiting scroll 13 and allow it to move along a circular orbit. The orbiting scroll 13 is eccentrically driven by the main shaft portion 4a on the upper end of ...

no. 2 approach

[0049] Figure 4 It is a graph showing the variation of the volume of the compression chamber with respect to the rotation angle when the involute angle θa of the scroll compressor according to the second embodiment of the present invention is varied within the range of θb Figure 4 It shows that when the involute angle θa at the end of the inner wall curve of the scroll wrap 12b of the fixed scroll 12 and the involute angle θb at the end of the inner wall curve of the scroll wrap 13b of the spiral scroll 13 are θb<θa<θb When changing within the range of +π, the volume of the compression chamber 15 changes with respect to the rotation angle (rotation angle) of the crankshaft 4 .

[0050] Here, a coordinate system is provided in which the center of the base circle of the inner wall curve of the scroll wrap 12b of the fixed scroll 12 is defined as the origin, and an arbitrary direction is defined as the involute angle: θ=0. The direction of turning counterclockwise from the front...

no. 3 approach

[0053] Figure 5 is a plan view showing the wrap shape of a scroll compressor according to a third embodiment of the present invention. exist Figure 5 , the center position of the base circle radius a and the center position of the base circle radius b are separated from each other. Thus, the compression chamber 15b formed on the inner wall side of the wrap wrap 13b of the orbiting scroll 13 is compressed faster than the compression chamber 15a formed on the outer wall side of the compression wrap 13b of the orbiting scroll 13, and While maintaining this characteristic, the thickness of the scroll wrap can be varied. Therefore, the strength of the scroll wrap can be adjusted freely.

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Abstract

A scroll compressor, wherein the external wall curve of the spiral lap of a fixed scroll and the internal wall curve of the spiral lap of a rotary scroll are formed of an involute curve with a base circle radius 'a', the internal wall curve of the spiral lap of the fixed scroll and the external wall curve of the spiral lap of the rotary scroll are formed of an involute curve with a base circle radius 'b', and a value a / b as the ratio of the base circle radius 'a' to the base circle radius 'b' is set to more than 1.0 to less than 1.5. Since a compression chamber formed on the internal wall side of the spiral lap of the rotary scroll is compressed faster than a compression chamber formed on the external wall side of the spiral lap of the rotary scroll, leakage loss during compression can be reduced.

Description

technical field [0001] The present invention relates to a scroll compressor, wherein a fixed scroll and an orbiting wrap whose scroll wraps rise from an end plate are engaged with each other so as to form a compression chamber therebetween, and When the shaped track rotates while the rotation is restricted by the restricting rotation mechanism, the compression chamber moves and simultaneously changes its volume, thereby performing suction, compression and discharge operations. Background technique [0002] In such conventional scroll compressors, the two scroll wraps forming the fixed wrap and the orbiting wrap are formed by involute curves, which in many cases are involutes of circles with a constant radius. [0003] In some scroll compressors, the thickness of part or the entire wrap wrap of the fixed wrap and the orbiting wrap changes from the center of the wrap toward the outer edge (see Patent Document 1, for example). [0004] In some scroll compressors, a step is add...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C18/02F04C23/00F04C29/02F04C29/04
CPCF04C29/028F04C23/008F04C18/0246F04C29/045F04C18/0215F04C18/02
Inventor 鶸田晃泽井清森本敬二上义幸辻本力
Owner PANASONIC CORP
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