EP 1004773 A1 20000531 - MULTI-STAGE CAPACITY CONTROL SCROLL COMPRESSOR
Title (en)
MULTI-STAGE CAPACITY CONTROL SCROLL COMPRESSOR
Title (de)
SPIRALVERDICHTER MIT MEHRSTUFIGEM MENGENREGLER
Title (fr)
COMPRESSEUR A VOLUTE DE TYPE A COMMANDE DE CAPACITE EN PLUSIEURS ETAPES
Publication
Application
Priority
- JP 9902761 W 19990526
- JP 16502298 A 19980612
Abstract (en)
A first bypass valve (27) that sets discharge capacity to 60% is provided in a first scroll 21 of an asymmetrical spiral-type scroll compressor. Also, a second bypass valve (40) that makes suction side and discharge side communicated with each other so that set load of the compressor becomes 50% is provided outside a scroll of the first scroll (21). In this way, by closing the first and second bypass valves (27, 40), effective load of the compressor is set to 100%. Also, by opening the first bypass valve (27) and concurrently closing the second bypass valve (40), the effective load of the compressor is set to 60%. Further, by opening both the first and second bypass valves (27, 40), the effective load of the compressor is set to 30%. That is, 50% or lower partial load operation with high reliability is performed by setting volume ratio Vr during minimum capacity operation to a value of "1" or more. As a result of this, 50% or lower partial load operation can be changed over in multiple stages. <IMAGE>
IPC 1-7
IPC 8 full level
F04C 18/02 (2006.01); F04C 28/16 (2006.01); F04C 28/26 (2006.01); F04C 29/04 (2006.01); F04C 29/12 (2006.01)
CPC (source: EP KR)
F04C 18/02 (2013.01 - KR); F04C 28/16 (2013.01 - EP); F04C 18/0215 (2013.01 - EP)
Designated contracting state (EPC)
BE DE ES FR GB IT
DOCDB simple family (publication)
EP 1004773 A1 20000531; EP 1004773 A4 20040512; EP 1004773 B1 20101208; CN 1094566 C 20021120; CN 1272906 A 20001108; DE 69943017 D1 20110120; ES 2356224 T3 20110406; JP 2974009 B1 19991108; JP H11351167 A 19991221; KR 100601270 B1 20060713; KR 20010022824 A 20010326; WO 9964744 A1 19991216
DOCDB simple family (application)
EP 99922489 A 19990526; CN 99800912 A 19990526; DE 69943017 T 19990526; ES 99922489 T 19990526; JP 16502298 A 19980612; JP 9902761 W 19990526; KR 20007001426 A 20000211