To specify a cause of failure by troubleshooting of an ejector and an expansion valve in an ejector cycle.
In an ejector cycle, when the temperature difference between an inlet side refrigerant temperature and an outlet side refrigerant temperature of a second evaporator 8 is a predetermined value or more in the case of totally closing the throttle opening of the expansion valve 7, a throttle means 7 is determined to be in an abnormal state in opening. When a pressure sensor 37 for detecting high pressure side pressure between the ejector 5 and the throttle means 7 from a compressor 3 is in a high pressure state of a predetermined pressure or higher in the case of totally closing the throttle opening of the throttle means 7 and opening the passage opening of a nozzle part 50 of the ejector 5, the ejector 5 is determined to be in an abnormal state in total closing. When the high pressure side pressure is a predetermined pressure or higher in the case of totally closing the passage opening of the nozzle part 50 of the ejector 5 and opening the throttle opening of the throttle means 5, the throttle means 7 is determined to be in an abnormal state in total closing.
| JPS61252463 | REFRIGERANT OVER-SEALING PREVENTIVE DEVICE |
Takahiro Miura
Fumihiro Mizuno
Next Patent: REFRIGERANT FILLING DEVICE, REFRIGERATING DEVICE AND REFRIGERANT FILLING METHOD