Title:
SCROLL COMPRESSOR
Document Type and Number:
WIPO Patent Application WO/2011/104879
Kind Code:
A1
Abstract:
Disclosed is a scroll compressor that can be easily mass produced at a low cost as a compact and lightweight structure, and in which efficient low-capacity control is possible in a super-low speed operation mode. In the compressor, a discharge guide pipe (120) that guides the refrigerant gas in a discharge heat space (123) within a discharge head cover (118), which is equipped with a release mechanism on the outer periphery of a discharge port (108) and disposed on the top plate of a fixed scroll (102), from the space (123) to the exterior of a sealed case (115), and a suction pipe (113) for suctioning the refrigerant gas are coupled together and communicated by means of a solenoid valve (122) in which opening and closing are controlled by means of a pulse-width modulation control signal, and a bypass passage is formed that guides the refrigerant gas within the space (123) from the guide pipe (120) to the suction pipe (113). When low-capacity control is necessary in a low-speed rotation range, a motor (100) is driven by means of an inverter (128) and an operation is performed in which the ratio between the operation for closing the valve (122) and the operation for opening the valve (122) with the pulse-width modulation control signal from a solenoid drive circuit (129) has been altered.
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Inventors:
SATO EIJI (JP)
KOYAMA MASAKI (JP)
KOYAMA MASAKI (JP)
Application Number:
PCT/JP2010/053143
Publication Date:
September 01, 2011
Filing Date:
February 26, 2010
Export Citation:
Assignee:
HITACHI LTD (JP)
SATO EIJI (JP)
KOYAMA MASAKI (JP)
SATO EIJI (JP)
KOYAMA MASAKI (JP)
International Classes:
F04C18/02
Foreign References:
| JPH0861269A | 1996-03-08 | |||
| JP2004239099A | 2004-08-26 | |||
| JP2009097358A | 2009-05-07 | |||
| JP2005282936A | 2005-10-13 | |||
| JP2001099078A | 2001-04-10 | |||
| JP2550612B2 | 1996-11-06 | |||
| JP2006200455A | 2006-08-03 |
Other References:
See also references of EP 2541066A4
Attorney, Agent or Firm:
The Patent Body Corporate TAKEWA INTERNATIONAL PATENT OFFICE (JP)
Patent business corporation Takekazu international patent firm (JP)
Patent business corporation Takekazu international patent firm (JP)
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Claims: