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Two-stage rotary compressor

A rotary compressor and two-stage compression technology, which is applied in the direction of rotary piston machinery, rotary piston pump, rotary piston/swing piston pump components, etc., can solve the problem of large flow rate, large pressure loss, and reduced efficiency. question

Inactive Publication Date: 2009-04-01
FUJITSU GENERAL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if the inner diameter of the low-pressure connecting pipe and the intermediate connecting pipe are the same, there will be a problem that the efficiency will drop due to the high flow velocity in the low-pressure connecting pipe and the increase in pressure loss.

Method used

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  • Two-stage rotary compressor
  • Two-stage rotary compressor
  • Two-stage rotary compressor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] refer to Picture 1-1 Embodiment 1 of the present invention will be described with respect to the sectional view of the compressor. The compressor 1 is a two-stage compression rotary compressor having a structure in which a cylindrical hermetic container 10 is arranged vertically, and a compression member 12 and a motor 11 for driving the compression member 12 are housed inside the hermetic container 10 .

[0024] The stator 111 of the motor 11 is shrink-fitted on the inner surface of the sealed container 10 . The rotor 112 of the electric motor 11 is shrink-fitted and fixed to the rotating shaft 15 , and the rotating shaft 15 is mechanically connected to the electric motor 11 and the compression member 12 arranged at the center of the stator 111 .

[0025] The compression unit 12 is formed by serially connecting a low-pressure side compression unit 12L and a high-pressure side compression unit 12H provided above the low-pressure side compression unit 12L. Figure 1-2 ...

Embodiment 2

[0052] The present invention is also applicable to figure 2 The two-stage compression rotary compressor shown (injection corresponding type two-stage compression rotary compressor) has a suction A unit for sucking refrigerant at an intermediate pressure between the condensing pressure and the evaporating pressure of the refrigeration cycle. figure 2 In the injection-compatible two-stage compression rotary compressor 2 shown, an intermediate-pressure suction port is provided in the middle part of the intermediate connection pipe 23 between the discharge end of the low-pressure side compression part 12L and the suction end of the high-pressure side compression part 12H. The pipe 81 (injection pipe) sucks in injection refrigerant which is an intermediate pressure between the condensation pressure and the evaporation pressure of the refrigeration cycle, which is used by the two-stage compression rotary compressor itself. also, figure 2 The shown injection-compatible two-stage...

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PUM

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Abstract

A two-stage compression rotary compressor with high compression efficiency includes a low-stage compressing section and a high-stage compressing section housed within a cylindrical sealed housing oriented vertically, a low-stage suction pipe connected to a suction side of the low-stage compressing section and sucking in a low-pressure refrigerant, a low-stage discharge pipe connected to a discharge side of the low-stage compressing section and discharging the refrigerant from the low-stage to outside of the sealed housing, a high-stage suction pipe connected to a suction side of the high-stage compressing section and sucking in the refrigerant discharged from the low-stage, a low-pressure connecting pipe that connects the low-stage suction pipe and an accumulator, and guides the refrigerant inside the accumulator to a suction side of a low-stage compressing section, and an intermediate connecting pipe that connects the low-stage discharge pipe and the high-stage suction pipe, wherein an inner diameter of the low-pressure connecting pipe is larger than an inner diameter of the intermediate connecting pipe.

Description

technical field [0001] The invention relates to a two-stage compression rotary compressor. Background technique [0002] Generally speaking, a two-stage compression rotary compressor is equipped with: a low-pressure side compression part and a high-pressure side compression part inside a sealed container, an electric motor for driving the low-pressure side compression part and a high-pressure side compression part, and an accumulator on the side of the compressor body. compressor. [0003] In the sealed container, the first through hole, the second through hole and the third through hole are arranged in a row along the longer direction of the rotating shaft, and there is a low pressure side suction pipe passing through the second through hole and the low pressure side compression part The suction end is connected to suck the low-pressure refrigerant Ps. [0004] In addition, there is a low-pressure side discharge pipe, which is connected to the discharge end of the low-pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C23/00F04C18/356F04C29/12F04C29/00
CPCF04C23/008F04C18/3564F04C23/001
Inventor 两角尚哉上田健史
Owner FUJITSU GENERAL LTD