Title:
車両用空気調和装置
Document Type and Number:
Japanese Patent JP6767841
Kind Code:
B2
Abstract:
A vehicle air conditioner is provided which is capable of detecting a refrigerant lack accompanying a refrigerant leakage and the like over time at the earliest possible stage and protecting a compressor. The vehicle air conditioner is provided with a compressor 2, a radiator 4, an outdoor expansion valve 6, and a heat absorber 9. The vehicle air conditioner holds normal time data indicating a relation between the number of revolutions NC of the compressor and a discharge refrigerant temperature Td thereof when a sufficient amount of refrigerant is filled in a refrigerant circuit R. The present invention calculates a discharge refrigerant temperature estimated value Tdst in normal time from the normal time data on the basis of a current number of revolutions NC and compares the discharge refrigerant temperature estimated value Tdst with a current discharge refrigerant temperature Td to determine a refrigerant lack of the refrigerant circuit.
Inventors:
Tetsuya Ishizeki
Yamazaki Yumitsu
Horikoshi Akira
Miyakoshi Ryu
Kohei Yamashita
Megumi Shigeta
Yamazaki Yumitsu
Horikoshi Akira
Miyakoshi Ryu
Kohei Yamashita
Megumi Shigeta
Application Number:
JP2016202850A
Publication Date:
October 14, 2020
Filing Date:
October 14, 2016
Export Citation:
Assignee:
Sanden Automotive Climate System Co., Ltd.
International Classes:
F25B49/02; B60H1/22; B60H1/32; F25B1/00
Domestic Patent References:
| JP2013204871A | ||||
| JP2011163728A | ||||
| JP2006023051A | ||||
| JP4281334B2 | ||||
| JP2016090177A | ||||
| JP2000304388A |
Foreign References:
| WO2016043308A1 |
Attorney, Agent or Firm:
Kei Amekasa