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1. (WO2018221229) BACK PRESSURE CONTROL VALVE AND SCROLL COMPRESSOR

Pub. No.:    WO/2018/221229    International Application No.:    PCT/JP2018/019006
Publication Date: Fri Dec 07 00:59:59 CET 2018 International Filing Date: Fri May 18 01:59:59 CEST 2018
IPC: F04C 18/02
F04C 28/00
F04C 28/26
Applicants: SANDEN HOLDINGS CORPORATION
サンデンホールディングス株式会社
Inventors: TESHIMA Atsuo
手島 淳夫
Title: BACK PRESSURE CONTROL VALVE AND SCROLL COMPRESSOR
Abstract:
[Problem] To achieve optimization of back pressure in a scroll compressor. [Solution] This back pressure control valve (400) is provided with: a valve hole (484A) communicating with a discharge chamber; a body (440) in which a first pressure chamber H6 communicating with a back pressure chamber, a second pressure chamber H7 communicating with an intake chamber, a third pressure chamber H8 communicating with the back pressure chamber, a fourth pressure chamber H9 into which an injection pressure Pinj is introduced, and a fifth pressure chamber H10 into which a reference pressure P0 is introduced are arranged in series; a valve body (420) extending from the first pressure chamber H6 to the fourth pressure chamber H9 and adjusting an opening; and a pressure reducing member (460) which moves the valve body (420) by means of the pressure difference between the injection pressure Pinj and the reference pressure P0. The valve body (420) has: a first pressure receiving surface S1 which receives a discharge pressure Pd in the valve opening direction; a second pressure receiving surface S2 which receives an intake pressure Ps in the valve opening direction; a third pressure receiving surface S3 which receives a back pressure Pm in the valve closing direction; and a fourth pressure receiving surface S4 which receives an injection pressure Pinj in the valve opening direction.