Title:
HEAT PUMP DEVICE
Document Type and Number:
Japanese Patent JP2016084986
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a heat pump device capable of implementing a switching operation between an ordinary refrigeration cycle and a defrosting cycle after surely discharging a liquid refrigerant in a heat exchanger.SOLUTION: A refrigeration circuit 30 is constituted to implement a liquid recovering operation for implementing a degassing operation while reducing an opening of an expansion valve 52 in comparison with the opening in an ordinary refrigeration cycle, before a switching operation, and includes detecting portions 71, 75, 76 detecting that a refrigerant flowing out from a heat exchanger 40, 53 applied as a condenser of the use-side heat exchanger 40 and the heat source-side heat exchanger 53 has an overheat state, during the liquid recovering operation. The refrigerant circuit 30 is constituted to terminate the liquid recovering operation and implement the switching operation, when the overheat state of the refrigerant is detected by the detecting portions 71, 75, 76 during the liquid recovering operation.SELECTED DRAWING: Figure 4
Inventors:
O MEIJIN
UKIBUNE MASANORI
UKIBUNE MASANORI
Application Number:
JP2014218224A
Publication Date:
May 19, 2016
Filing Date:
October 27, 2014
Export Citation:
Assignee:
DAIKIN IND LTD
International Classes:
F25B13/00; F25B43/00; F25B47/02
Attorney, Agent or Firm:
Maeda patent office