Title:
FREEZING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2018/043571
Kind Code:
A1
Abstract:
Provided is a freezing apparatus that, even in the event of a refrigerant leak taking place during a defrosting operation of a utilization-side heat exchanger, is able to minimize the amount of leakage. In the case where the situation of refrigerant leakage in the surrounding environment of a utilization-side heat exchanger (52) fulfills a prescribed leakage condition when a defrosting operation is executed while the connection state of a four-way switching valve (22) is set to a defrosting connection state so as to allow a heat source-side heat exchanger (23) to function as an evaporator of a refrigerant and simultaneously allow the utilization-side heat exchanger (52) to function as a heat radiator of the refrigerant, a controller (70) performs density reduction control so as to reduce the density of the refrigerant in the utilization-side heat exchanger (52) while keeping the switching valve in the defrosting connection state.
Inventors:
SAKAE SATORU
KONDOU AZUMA
TAKEGAMI MASAAKI
NOMURA KAZUYOSHI
KONDOU AZUMA
TAKEGAMI MASAAKI
NOMURA KAZUYOSHI
Application Number:
PCT/JP2017/031182
Publication Date:
March 08, 2018
Filing Date:
August 30, 2017
Export Citation:
Assignee:
DAIKIN IND LTD (JP)
International Classes:
F25B47/02; F25B1/00; F25B49/02; F25D21/06
Foreign References:
| JP2001116419A | 2001-04-27 | |||
| JP2002277144A | 2002-09-25 | |||
| JPH0942817A | 1997-02-14 |
Other References:
See also references of EP 3508803A4
Attorney, Agent or Firm:
SHINJYU GLOBAL IP (JP)
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