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1. (WO2015045116) REFRIGERATION CYCLE DEVICE

Pub. No.:    WO/2015/045116    International Application No.:    PCT/JP2013/076344
Publication Date: Fri Apr 03 01:59:59 CEST 2015 International Filing Date: Sat Sep 28 01:59:59 CEST 2013
IPC: F25B 1/00
Applicants: MITSUBISHI ELECTRIC CORPORATION
三菱電機株式会社
Inventors: YANACHI, Satoru
梁池 悟
KATO, Yohei
加藤 央平
OBAYASHI, Tomoyoshi
大林 誠善
Title: REFRIGERATION CYCLE DEVICE
Abstract:
The purpose of the present invention is to provide a refrigeration cycle device capable of suppressing an increase in high pressure side coolant pressure while suppressing decreases in heating temperature and heating performance of a heating medium. This refrigeration cycle device is provided with a compressor that compresses a coolant, a high temperature side heat exchanger that causes the coolant compressed by the compressor to exchange heat with a heating medium, an expansion unit that expands the coolant having passed through the high temperature side heat exchanger, a low temperature side heat exchanger that causes the coolant having passed through the expansion unit to exchange heat with a fluid, and a conveyance unit that conveys the fluid to the low temperature side heat exchanger. The refrigeration cycle device is provided with a control means that, with coolant pressure after being compressed by the compressor as high pressure side coolant pressure, with coolant pressure before being compressed by the compressor as low pressure side coolant pressure, and with an operation state that minimizes the high pressure side coolant pressure when the low pressure side coolant pressure is changed with coolant compressing capability of the compressor kept constant as a target operation state of a refrigeration cycle, controls the operation of the conveyance unit so that the actual operation state approaches the target operation state.