Title:
REFRIGERATION CYCLE DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/093249
Kind Code:
A1
Abstract:
Provided is a refrigeration cycle device with which lengthening of the defrost time can be prevented. This refrigeration cycle device (100) is equipped with: a refrigerant circuit (80), which has a compressor (12), a heat-source-side heat exchanger (20) (that includes a main heat exchange unit (22), an auxiliary heat exchange unit (28), and a pressure loss unit (25) arranged between the main heat exchange unit and the auxiliary heat exchange unit), an expansion mechanism (18), a usage-side heat exchanger (62), and a flow direction switching mechanism (14) for switching the flow direction of the refrigerant; a first temperature sensor (92c) for measuring a first refrigerant temperature (T1) between the main heat exchange unit and the pressure loss unit; a second temperature sensor (92d) for measuring a second refrigerant temperature (T2) between the pressure loss unit and the expansion mechanism; and a controller (70) that switches between executing a normal operation and a defrost operation, by controlling the flow direction switching mechanism (14). The controller has, as control modes for the defrost operation, a control mode for ending the defrost operation on the basis of the first refrigerant temperature (T1), and a control mode for ending the defrost operation on the basis of the second refrigerant temperature (T2).
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Inventors:
TOMIYAMA YOU
Application Number:
PCT/JP2018/040904
Publication Date:
May 16, 2019
Filing Date:
November 02, 2018
Export Citation:
Assignee:
DAIKIN IND LTD (JP)
International Classes:
F25B47/02
Domestic Patent References:
| WO2017094594A1 | 2017-06-08 |
Foreign References:
| JP2007232274A | 2007-09-13 | |||
| JP2011158144A | 2011-08-18 | |||
| CN102297549A | 2011-12-28 | |||
| JPS62171765U | 1987-10-31 | |||
| JPH0255041U | 1990-04-20 | |||
| JPS6389563U | 1988-06-10 | |||
| JPH07174389A | 1995-07-14 | |||
| JPS63201442A | 1988-08-19 |
Other References:
See also references of EP 3708929A4
Attorney, Agent or Firm:
SHINJYU GLOBAL IP (JP)
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