Title:
SCREW COMPRESSOR
Document Type and Number:
WIPO Patent Application WO/2012/042891
Kind Code:
A1
Abstract:
A screw compressor (1) is provided with a slide valve (60) for changing the compression ratio. A sealing protrusion section (66) is formed on the valve element section (65) of the slide valve (60) so as to extend along the rear end surface (74) of the valve element section (65). In the slide valve containing section (31) of the casing (10), the sealing protrusion section (66) of the slide valve (60) is in sliding contact with the sliding contact curved surface (32) of the casing (10) to separate a low-pressure space (S1) and a high-pressure space (S2). The refrigerant pressure within the low-pressure space (S1) always acts on the entire non-contact surface (77) of the valve element section (65). This causes a force which presses the valve element section (65) toward the screw rotor (40) to be constant irrespective of the position of the slide valve (60), and as a result, a variation in the clearance between the front face (71) of the valve element section (65) and the screw rotor (40) is reduced.
Inventors:
INOUE TAKASHI (JP)
MASUDA MASANORI (JP)
UENO HIROMICHI (JP)
HOSSAIN MOHAMMOD ANWAR (JP)
MATSUOKA AKIRA (JP)
MASUDA MASANORI (JP)
UENO HIROMICHI (JP)
HOSSAIN MOHAMMOD ANWAR (JP)
MATSUOKA AKIRA (JP)
Application Number:
PCT/JP2011/005516
Publication Date:
April 05, 2012
Filing Date:
September 29, 2011
Export Citation:
Assignee:
DAIKIN IND LTD (JP)
INOUE TAKASHI (JP)
MASUDA MASANORI (JP)
UENO HIROMICHI (JP)
HOSSAIN MOHAMMOD ANWAR (JP)
MATSUOKA AKIRA (JP)
INOUE TAKASHI (JP)
MASUDA MASANORI (JP)
UENO HIROMICHI (JP)
HOSSAIN MOHAMMOD ANWAR (JP)
MATSUOKA AKIRA (JP)
International Classes:
F04C18/52; F04C28/12
Foreign References:
| US3314597A | 1967-04-18 | |||
| JP2009174527A | 2009-08-06 | |||
| JP2004137934A | 2004-05-13 |
Other References:
See also references of EP 2623789A4
Attorney, Agent or Firm:
MAEDA, Hiroshi et al. (JP)
Hiroshi Maeda (JP)
Hiroshi Maeda (JP)
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Claims: