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Injectible two-stage compression rotary compressor

a compressor and compression technology, applied in the direction of machines/engines, liquid fuel engines, positive displacement liquid engines, etc., can solve the problems of increasing pressure loss of injection refrigerant and impaired compressor compression efficiency

Inactive Publication Date: 2010-03-04
FUJITSU GENERAL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides an injectable two-stage compression rotary compressor for a heat pump system utilizing an injection refrigerating cycle. The compressor has a sealed cylindrical housing with communication holes and a low-stage compressing section and a high-stage compressing section within the housing. A motor drives the compressing sections, and there is an accumulator and connecting pipes for introducing a medium pressure injection refrigerant. The technical effects of the invention include improved efficiency, reduced noise, and improved performance of the heat pump system.

Problems solved by technology

Therefore, the pressure pulsation in the intermediate connecting pipe further increases, the pressure pulsation propagates into injection piping, and a pressure loss of the injection refrigerant increases.
As a result, compression efficiency of the compressor is impaired.

Method used

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  • Injectible two-stage compression rotary compressor
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  • Injectible two-stage compression rotary compressor

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0028]FIG. 1A shows a basic structure of a refrigerating cycle of an air conditioner, FIG. 1B is a vertical sectional view showing a first embodiment of an injectable two-stage compression rotary compressor of the air conditioner according to the invention, FIG. 1C is a cross sectional view of a low-stage compressing section and a high-stage compressing section of the two-stage compression rotary compressor, FIG. 1D is a cross sectional view taken along line A-A of FIG. 1B, FIG. 1E is a cross sectional view of a low-stage end plate, FIG. 1F is a sectional view taken along line B-B of FIG. 1E, FIG. 1G is a front view of a compressor housing, FIG. 1H is a side view of the injectable two-stage compression rotary compressor in the first embodiment, FIG. 1I is a vertical sectional view showing a variation of the injectable two-stage compression rotary compressor in the first embodiment, and FIG. 1J is a vertical sectional view showing another variation of the injectable two-stage compres...

second embodiment

[0069]FIG. 2 is a side view of a second embodiment of the injectable two-stage compression rotary compressor of the air conditioner according to the invention. As a structure characterizing a compressor 1B in the second embodiment, the low-stage muffler discharge hole 210L (see FIG. 1E) is provided in a radial direction in a position with a leftward phase shift in a circumferential direction of the compressor housing 10 from the low-stage suction hole 135L (see FIG. 1C) and the high-stage suction hole 135H of the compressing section 12.

[0070]As shown in FIG. 2, the cylindrical compressor housing 10 is provided, in its outer peripheral wall, with the first communication hole 101, the second communication hole 102, and the third communication hole 103 in this order upward from a lower portion while spaced from each other in an axial direction. The second communication hole 102 and the third communication hole 103 are provided in the same circumferential position (front) of the compres...

third embodiment

[0075]FIG. 3 is a side view showing a third embodiment of the injectable two-stage compression rotary compressor of the air conditioner according to the invention. As a structure characterizing a compressor 1C in the third embodiment, the low-stage suction hole 135L (see FIG. 1C) of the compressing section 12 is provided in a radial direction in a position with a rightward phase shift in a circumferential direction of the compressor housing 10 from the low-stage muffler discharge hole 210L (see FIG. 1E) and the high-stage suction hole 135H.

[0076]As shown in FIG. 3, the cylindrical compressor housing 10 is provided, in its outer peripheral wall, with the first communication hole 101, the second communication hole 102, and the third communication hole 103 in this order upward from a lower portion while spaced from each other in an axial direction. The first communication hole 101 and the third communication hole 103 are provided in substantially the same circumferential position (fron...

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Abstract

An injectable two-stage compression rotary compressor includes a compressor housing; a low-stage compressing section provided in the compressor house; a high-stage compressing section provided near the low-stage compressing section; a motor for driving the low-stage compressing section and the high-stage compressing section; an accumulator held at an outer side portion of the compressor housing; a low-pressure connecting pipe connecting the accumulator and the low-stage compressing section; an intermediate connecting pipe connecting the low-stage compressing section and the high-stage compressing section outside the compressor housing; and an intermediate suction pipe for introducing a medium pressure injection refrigerant into the intermediate connecting pipe. The intermediate suction pipe is connected to the intermediate connecting pipe so that an outlet of the intermediate suction pipe faces in a flowing direction of a medium pressure gas refrigerant in the intermediate connecting pipe.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to an injectable two-stage compression rotary compressor used for a heat pump system utilizing an injection refrigerating cycle and specifically to a compressor where a medium pressure injection refrigerant, which is a high dryness wet refrigerant of a refrigerating cycle side, is introduced into an intermediate connecting pipe of a medium pressure gas refrigerant atmosphere.[0003]2. Description of the Related Art[0004]A conventional two-stage compression rotary compressor includes a low-stage compressing section and a high-stage compressing section disposed in a sealed cylindrical compressor housing, a motor for driving the low-stage compressing section and the high-stage compressing section, and an accumulator disposed beside the compressor housing.[0005]The compressor housing is provided with a first communication hole, a second communication hole, and a third communication hole in a lin...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F04C18/356F04B39/00
CPCF04C18/3564F04C23/001F04C2240/804F04C29/0007F04C23/008
Inventor UEDA, KENSHIMOROZUMI, NAOYA
Owner FUJITSU GENERAL LTD