Title:
REFRIGERATION CYCLE SYSTEM
Document Type and Number:
WIPO Patent Application WO/2024/084536
Kind Code:
A1
Abstract:
The refrigeration cycle system comprises: a refrigerant circuit which has a compressor and through which a refrigerant is circulated by the compressor; a heat medium circuit which has a heat source side pump and through which a heat medium is circulated by the heat source side pump; a heat exchanger that exchanges heat between the refrigerant and the heat medium; and a system control device that controls the heat source side pump. The heat medium circuit has a load device provided on the downstream side of the heat exchanger, and a bypass piping that bypasses the load device. The refrigeration cycle system comprises a first detection unit that is provided to the heat medium circuit and that detects pressure difference before and after the heat exchanger, and a second detection unit that is provided to the heat medium circuit and that detects bypass pressure difference before and after the bypass piping. The system control device obtains the lift of the heat source side pump from the pressure difference detected by the first detection unit and the rotational speed of the heat source side pump, calculates the bypass pressure difference before and after the bypass piping on the basis of the pressure difference and the lift, and determines the deposition state of scales in the heat exchanger by comparing, with a pre-stored difference value, the difference between a calculation value of the calculated bypass pressure difference and an actual measurement of the bypass pressure difference detected by the second detection unit.
Inventors:
MUKAITANI NAOYA (JP)
AKAGI SATOSHI (JP)
AKAGI SATOSHI (JP)
Application Number:
PCT/JP2022/038500
Publication Date:
April 25, 2024
Filing Date:
October 17, 2022
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F25B1/00; F25B49/02
Attorney, Agent or Firm:
KISA PATENT & TRADEMARK FIRM (JP)
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