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Scroll compressor

A scroll compressor and scroll technology, applied in the field of scroll compressors, can solve problems such as difficulty in tracking temperature gradients

Active Publication Date: 2009-06-03
MITSUBISHI HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, regarding the influence of thermal expansion, in the scroll compressor of the above-mentioned patent document, it is difficult to track the continuous temperature gradient from the suction temperature to the discharge temperature, and it is difficult to optimize the blade tip clearance corresponding to the temperature gradient. , but it is far from enough to improve the compression performance

Method used

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Experimental program
Comparison scheme
Effect test

no. 1 approach

[0071] Hereinafter, the first embodiment of the present invention is used Figure 1 to Figure 4 Be explained.

[0072] figure 1 A partial longitudinal sectional view of the scroll compressor S is shown in . The scroll compressor S is a hermetic scroll compressor S having a hermetic casing 1, and an exhaust cover 2 is provided inside the hermetic casing 1 to divide the interior of the hermetic casing 1 into a high-pressure chamber HR and a low-pressure chamber LR. . A compression mechanism 3 and an electric motor 8 are provided on the low-pressure chamber LR side, and a suction pipe 6 is connected thereto. In addition, a discharge pipe 7 is connected to the side of the high-pressure chamber HR.

[0073] The compression mechanism 3 in the low-pressure chamber LR is arranged on a frame 5 fixedly arranged in the airtight casing 1 . The compression mechanism 3 is connected to the electric motor 8 through a crankshaft 9 supported by the frame 5 and the lower frame 4 via bearing...

no. 2 approach

[0099] Next, for the second embodiment of the present invention, use Figure 5 Be explained.

[0100] This embodiment differs from the above-mentioned first embodiment in that the height (wrap height) of the front end surfaces of the spiral wraps 12b, 13b is changed stepwise. Other points are the same as those of the first embodiment, and thus description thereof will be omitted.

[0101] In the above-mentioned first embodiment, the heights of the front end surfaces 12c and 12d and the front end surfaces 13c and 13d are changed in stages at fixed step differences δo and δi (δo=δi), respectively, but in this embodiment, each The step difference δi1 of the inner peripheral side front end surfaces 12c, 13c of the stepped portions 12e, 13e of the spiral wraps 12b, 13b is larger than the step difference δo of the outer peripheral side front end surfaces 12d, 13d (δo<δi1).

[0102] As described above, by making the step difference δi1 of the front end faces 12c, 13c on the inner p...

no. 3 approach

[0105] Next, for the third embodiment of the present invention, use Figure 6 Be explained.

[0106] This embodiment differs from the above-mentioned first and second embodiments in that the height of the front end surfaces of the spiral wraps 12b, 13b (wrap height) is changed stepwise. The other points are the same as those of the first and second embodiments, and thus description thereof will be omitted.

[0107] In the present embodiment, the front end faces 12d and 13d on the outer peripheral side are changed in height step by step with a constant step difference δo, but the front end portions 12c and 13c on the inner peripheral side are directed toward the center side, and the step differences δi2, δi3, and δiN are gradually changed. Increase (δi2<δi3<δiN).

[0108] As described above, by gradually increasing the steps δi2, δi3, and δiN of the front end surfaces 12c and 13c on the inner peripheral side toward the center (δi2<δi3<δiN), the inner peripheral side can be gr...

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PUM

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Abstract

The present invention is to provide a scroll compressor capable of three-dimensional compression in which high performance can be achieved by optimizing a tip clearance during an operation while taking account of thermal expansion and pressure deformation, and reducing compression leakage thereby enhancing compression efficiency. The three-dimensional compression enabled scroll compressor in which a level difference (13e) is provided between the distal end faces (13c, 13d) and the bottom face of a spiral lap (13b), a lap height is set larger on the outer circumferential side of the spiral lap (13b) than on the inner circumferential side, and compression in the circumferential direction and the lap height direction of the spiral lap (13b) is possible, wherein the height of the spiral lap (13b) on the inner circumferential side of the level difference (13e); is reduced stepwise or continuously and gradually toward the central side of the spiral lap (13b), and the tip clearance (delta) of the spiral lap is increased gradually toward the central side of the spiral lap (13b) on the inner circumferential side of the level difference (13e).

Description

technical field [0001] The present invention relates to a scroll compressor, which can make the height of the outer peripheral side wrap of the scroll-shaped wrap of the scroll member higher than the height of the inner peripheral side wrap, and can make the spiral wrap along the circumferential direction of the scroll-shaped wrap and Three-dimensional compression of volume height direction compression. Background technique [0002] In recent years, as for the scroll compressor, a scroll compressor having the following structure has been developed, which has: a fixed scroll member in which a fixed scroll-shaped wrap is erected on one side of a fixed end plate; The rotating part is erected on one side of the rotating end plate with a rotating scroll-shaped wrap body, and is assembled so that it can be driven to revolve and rotate while preventing rotation with respect to the fixed scroll part, wherein the fixed scroll part and the rotating scroll Steps are respectively provi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C18/02
CPCF04C18/0215F04C18/0276F04C27/007F04C23/008
Inventor 佐藤创馆石太一木全央幸宫本善彰高须洋悟
Owner MITSUBISHI HEAVY IND LTD
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