Title:
REFRIGERATION CYCLE DEVICE
Document Type and Number:
Japanese Patent JP2016205726
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To improve oil returning performance from an accumulator having a sub-tank.SOLUTION: A refrigeration cycle device includes an accumulator 30 having a main body portion 30a for separating a gas and a liquid of a refrigerant of which heat is absorbed by low pressure-side heat exchangers 31, 12 and accumulating the separated liquid-phase refrigerant, a sub-tank 30b for accumulating the liquid-phase refrigerant separated in the main body portion 30a, and a communication pipe 30c communicating the main body portion 30a and the sub-tank 30b for circulating the liquid-phase refrigerant, and a suction pipe 50 for returning the gas-phase refrigerant separated in the main body portion 30a to a suction side of the compressors 15, 16. An oil return hole 50a for allowing a lubrication oil mixed in the liquid-phase refrigerant in the main body portion 30a to flow therein is formed on the suction pipe 50, the suction pipe 50 has a lower part 50b positioned at a lower side in a gravity direction with respect to the oil return hole 50a, and further includes a bypass pipe 51 connected to the lower part 50b to allow the lubrication oil mixed in the liquid-phase refrigerant accumulated in the sub-tank 30b to flow into the lower portion 50b.SELECTED DRAWING: Figure 4
Inventors:
NAGURA HIROYUKI
Application Number:
JP2015089118A
Publication Date:
December 08, 2016
Filing Date:
April 24, 2015
Export Citation:
Assignee:
DENSO CORP
International Classes:
F25B43/02
Attorney, Agent or Firm:
Patent Business Corporation Kaisei Patent Office