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Sealed scroll compressor for helium

A scroll compressor, hermetic technology, applied in the field of scroll compressors, can solve the problems of reduced helium flow rate, uneven injection oil volume, and large internal compression power, etc., to achieve the effect of improving performance

Active Publication Date: 2012-11-21
HITACHI JOHNSON CONTROLS AIR CONDITIONING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] exist Figure 12 In, such as the pressure change in the prior art (P i3 ,P i4 ) curve, if the amount of injection oil injected into the two compression chambers 8a, 8b is not uniform, then as Figure 12 As shown, the decrease of the sealing between the compression chambers leads to the difference in the pressure rise ratio (compression line) in the two compression chambers, and the pressure difference between the compression chambers (ΔP 1 ) becomes larger
As a result, the amount of internal leakage increases, resulting in an increase in internal compression power, and as a result, the input of the compressor also increases.
In addition, volumetric efficiency decreases during inhalation resulting in reduced helium flow
As a result, there is a problem that the performance of the compressor decreases

Method used

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  • Sealed scroll compressor for helium
  • Sealed scroll compressor for helium
  • Sealed scroll compressor for helium

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Experimental program
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Embodiment Construction

[0062] Below, according to Figure 1 to Figure 12 An embodiment of the present invention will be described in detail.

[0063] exist figure 1 and figure 2 In , the flow of working helium and the flow of injected cooling oil are illustrated. The oil injection pipe 31 for cooling helium passes through the upper cover 2a of the airtight container 1 and is connected to the oil injection port 22 provided on the mirror plate portion 5a of the fixed scroll 5. The opening of the oil injection port 22 is connected to the The addendum surface of the wrap 6 b of the orbiting scroll 6 faces the opening. The scroll compression mechanism part is housed in the upper part on the suction pipe 17 side in the airtight container 1, and the motor part 3 is housed in the lower side. And the airtight container 1 is divided into the discharge chamber 1a and the motor chamber 1b which interposes the frame 7 with the discharge chamber 1a.

[0064] Such as Figure 6 and Figure 7 As shown, the ...

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Abstract

A sealed scroll compressor for helium having a stationary scroll, an orbiting scroll, and an oil-injection mechanism. The oil-injection mechanism has an oil-injection pipe arranged to pass through a sealed container and connected to an oil-injection port, and the opening of the oil-injection port is arranged at a bottom surface of a groove between ridges formed with the scroll wrap of the stationary scroll in such a manner that a first range of the orbital angle of the orbiting scroll is approximately identical to a second range of the orbital angle of the orbiting scroll, where the oil-injection port is connected to the outer compression chamber while the orbital angle of the orbiting scroll is in the first range, and is connected to the inner compression chamber while the orbital angle of the orbiting scroll is in the second range.

Description

technical field [0001] The present invention relates to the overall structure of a scroll compressor for refrigeration and air conditioning and a scroll compressor for helium. Background technique [0002] Patent Document 1 discloses a conventionally known example of a scroll compressor for helium. [0003] 【Prior technical literature】 [0004] 【Patent Literature】 [0005] [Patent Document 1] Japanese Patent Laid-Open No. 2009-156234 [0006] In Patent Document 1, an oil injection mechanism section is provided in which an oil injection pipe for cooling working helium passes through a closed container and is connected to an oil injection port provided on a mirror plate section of a fixed scroll. In addition, the amount of cooling injection oil injected to the compression chamber side on the outer side of the orbit formed by the outer curve of the orbiting scroll and the inner curve of the fixed scroll is different from the amount of oil injected to the orbit formed by the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C18/02F04C29/04F04C29/00
CPCF04C29/00F04C18/02F04C23/008F04C29/04F04C18/0261F04C2210/105F04C29/0007F04C18/0215F04C2240/806F04C29/12
Inventor 椎林正夫伊豆永康足立隆雅
Owner HITACHI JOHNSON CONTROLS AIR CONDITIONING INC