Title:
VEHICLE AIR CONDITIONER
Document Type and Number:
WIPO Patent Application WO/2018/070178
Kind Code:
A1
Abstract:
The present invention provides a vehicle air conditioner that can detect a lack of a refrigerant at the earliest possible stage accompanying a refrigerant leakage and the like over time, and can protect a compressor. The present invention is provided with a compressor 2, a heat radiator 4, an outdoor expansion valve 6, and a heat absorber 9. The present invention keeps normal time data indicating the relationship between a rotation speed NC of the compressor and a discharge refrigerant temperature Td when a sufficient amount of a refrigerant is filled in a refrigerant circuit R. From the normal time data, the present invention calculates a discharge refrigerant temperature estimated value Tdst in normal time on the basis of a current rotation speed NC and determines whether there is a lack of a refrigerant in the refrigerant circuit by comparing the discharge refrigerant temperature estimated value Tdst with the current discharge refrigerant temperature Td.
Inventors:
ISHIZEKI TETSUYA (JP)
YAMAZAKI YUMA (JP)
HORIKOSHI AKIRA (JP)
MIYAKOSHI RYO (JP)
YAMASHITA KOHEI (JP)
SHIGETA MEGUMI (JP)
YAMAZAKI YUMA (JP)
HORIKOSHI AKIRA (JP)
MIYAKOSHI RYO (JP)
YAMASHITA KOHEI (JP)
SHIGETA MEGUMI (JP)
Application Number:
PCT/JP2017/033165
Publication Date:
April 19, 2018
Filing Date:
September 07, 2017
Export Citation:
Assignee:
SANDEN AUTOMOTIVE CLIMATE SYSTEMS CORP (JP)
International Classes:
F25B49/02; B60H1/22; B60H1/32; F25B1/00
Domestic Patent References:
| WO2016043308A1 | 2016-03-24 |
Foreign References:
| JP2013204871A | 2013-10-07 | |||
| JP2011163728A | 2011-08-25 | |||
| JP2006023051A | 2006-01-26 | |||
| JP4281334B2 | 2009-06-17 | |||
| JP2016090177A | 2016-05-23 | |||
| JP2000304388A | 2000-11-02 |
Download PDF:
Previous Patent: COATING FILM FORMING METHOD AND INKJET COATING DEVICE
Next Patent: TEST APPARATUS AND PRODUCTION METHOD FOR LIGHT-EMITTING DEVICE
Next Patent: TEST APPARATUS AND PRODUCTION METHOD FOR LIGHT-EMITTING DEVICE