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Rotary compressor, method for manufacturing the same, and defroster for refrigerant circuit

A technology of rotary compressor and decompression device, which is applied in the field of rotary compressors and can solve problems such as unstable operation of the second rotary compression unit

Inactive Publication Date: 2008-02-06
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0026] However, in this case, the discharge side of the first rotary compression unit communicates with the discharge side of the second rotary compression unit, so that the suction side and the discharge side of the second rotary compression unit are at the same pressure, so there is a second rotary compression unit. Unstable operation of the 2nd rotary compression unit such as blade jumping of the compression unit

Method used

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  • Rotary compressor, method for manufacturing the same, and defroster for refrigerant circuit
  • Rotary compressor, method for manufacturing the same, and defroster for refrigerant circuit
  • Rotary compressor, method for manufacturing the same, and defroster for refrigerant circuit

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Embodiment Construction

[0074] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 shows a longitudinal sectional view of an internal intermediate pressure multi-stage (two-stage) compression rotary compressor 10 having first and second rotary compression units 32, 34 as an embodiment of the rotary compressor of the present invention.

[0075] In this figure, symbol 10 is carbon dioxide (CO 2 ) is an internal intermediate pressure type multi-stage compression rotary compressor used as a refrigerant. The rotary compressor 10 is composed of a cylindrical airtight container 12 made of steel plates, an electric unit 14, and a rotary compression mechanism part 18. The electric unit 14 Arranged and accommodated on the upper side of the inner space of the airtight container 12, the rotary compression mechanism part 18 includes a first rotary compression unit 32 (first stage) disposed on the lower side of the electric unit 14 and driven by the rotar...

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Abstract

An object of the present invention is to provide a method for manufacturing a multi-stage compression type rotary compressor which can avoid the replacement of parts to be used as much as possible to reduce costs and also which enables easily setting an appropriate displacement volume ratio while preventing the compressor from being increased in size. The gist of the present invention is that an inner diameter of a lower cylinder is altered without altering its thickness (or height), and a displacement volume ratio between first and second rotary compression elements is set to an optimum value in accordance with the alteration.

Description

[0001] This application is a divisional application of the patent application filed on August 28, 2002 with the title of "rotary compressor, its manufacturing method, and a box removal device using the compressor" and application number 02142300.8. technical field [0002] The present invention relates to an airtight container with an electric unit and a rotary compression unit driven by the electric unit for CO 2 A rotary compressor that compresses the refrigerant. [0003] The present invention also relates to a multi-stage compression type rotary compressor that sucks refrigerant gas compressed and discharged by the first rotary compression unit to the second rotary compression unit, compresses it, and discharges it, a manufacturing method thereof, and a compressor using the same. The defrosting device of the refrigerant circuit of the machine. Background technique [0004] A conventional internal intermediate pressure type multi-stage compression type rotary compressor ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B47/02F04C23/00F04C18/356
CPCF04C18/3564F04C23/008F04C23/001
Inventor 松本兼三山崎晴久只野昌也里和哉松浦大斋藤隆泰津田德行
Owner SANYO ELECTRIC CO LTD