REFRIGERATING CYCLE DEVICE

• Main Author: SAKA MITSUHIRO
• Format: Patent
• Language: English
• Published: 29.01.2009
• Subjects: ARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING,OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODSSPACES OF VEHICLES; BLASTING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; HEATING; LIGHTING; LIQUEFACTION SOLIDIFICATION OF GASES; MANUFACTURE OR STORAGE OF ICE; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; REFRIGERATION MACHINES, PLANTS OR SYSTEMS; REFRIGERATION OR COOLING; TRANSPORTING; VEHICLES IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To suppress insufficient oil return of a compressor due to an isolated operation of a first evaporator and to suppress deterioration in air conditioning feeling of a passenger in a vehicle cabin. SOLUTION: In the refrigerating cycle device for a vehicle, the first evaporator 5 and a second evaporator 7 are connected in parallel, and a flow passage opening and closing means for interrupting a refrigerant flow with respect to the second evaporator 7 when performing the isolated operation of the first evaporator 5 is not provided in a refrigerant passage on the second evaporator 7 side. A second pressure reducing means 6 includes a thermosensitive chamber 64 filled with a gas medium whose pressure rises according to a temperature rise of an outlet side refrigerant of the second evaporator 7, a valve element 6c whose opening is increased by a pressure rise of the gas medium inside the thermosensitive chamber 64, and an electric heater 70 for heating the gas medium inside the thermosensitive chamber 64 by energization, and is a temperature type expansion valve for controlling the degree of superheating of the outlet side refrigerant of the second evaporator 7. When the isolated operation of the first evaporator 5 is performed and a predetermined period of time of the operation time of the isolated operation passes, the electric heater is energized. COPYRIGHT: (C)2009,JPO&INPIT