REFRIGERATION CYCLE DEVICE - MITSUBISHI ELECTRIC CORP

Title:

REFRIGERATION CYCLE DEVICE

Document Type and Number:

WIPO Patent Application WO/2021/084774

Kind Code:

A1

Abstract:

This refrigeration cycle device comprises: a refrigeration cycle circuit connecting a compressor, a refrigerant flow path switching device, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger; a first branch part for branching a refrigerant between the outdoor heat exchanger and the expansion valve; a second branch part for branching the refrigerant between the indoor heat exchanger and the refrigerant flow path switching device; a bypass pipe for connecting the first branch part and the second branch part; a first valve provided between the second branch part and the refrigerant flow path switching device; a second valve provided in the bypass pipe; a first temperature sensor for detecting an indoor temperature; a second temperature sensor for detecting a liquid-side refrigerant temperature of the indoor heat exchanger; and a control device. In an operating state in which the compressor is operating, the expansion valve is in a fully closed state, and the first valve and the second valve are in a closed state, the control device senses an abnormality in at least one of the expansion valve and the second valve if there is a difference between the temperatures detected by the first temperature sensor and the second temperature sensor.

More Like This:

WO/2017/136174	LIQUID ACCUMULATOR FOR HEAT EXCHANGE SYSTEM, REFRIGERATION SYSTEM HAVING THE SAME, CASCADE REFRIGERATION SYSTEM AND CONTROL METHOD THEREOF
WO/2004/092669	TRANSPORT REFRIGERATION SYSTEM
WO/2017/123598	CENTRIFUGAL COMPRESSOR WITH LIQUID INJECTION

Inventors:

OCHIAI YASUTAKA (JP)
TASAKI NOBUAKI (JP)
KOMATSU KAZUHIRO (JP)

Application Number:

PCT/JP2020/010335

Publication Date:

May 06, 2021

Filing Date:

March 10, 2020

Export Citation:

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Assignee:

MITSUBISHI ELECTRIC CORP (JP)

International Classes:

F25B49/02; F24F11/32

Foreign References:

KR20180085275A	2018-07-26
JP2016508590A	2016-03-22
JP2000274896A	2000-10-06
KR20050114111A	2005-12-05
JPH0755299A	1995-03-03
JP2002071188A	2002-03-08

Attorney, Agent or Firm:

KISA PATENT & TRADEMARK FIRM (JP)

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