Title:
VEHICLE AIR CONDITIONER
Document Type and Number:
WIPO Patent Application WO/2017/146268
Kind Code:
A1
Abstract:
The present invention avoids operating with a shortage of refrigerant or oil as a result of refrigerant backflow to the heat radiator from an outdoor expansion valve, and prevents decreases in air conditioning performance and reliability. This vehicle air conditioner executes a first operation mode in which refrigerant discharged from a compressor (2) flows to the heat radiator (4), and a second operation mode in which the outdoor expansion valve (6) is closed completely, and the refrigerant flows directly to an outdoor heat exchanger (7) while bypassing the heat radiator and the outdoor expansion valve by means of a bypass device (45). In the second operation mode, a controller controls the rotating speed of the compressor (2) on the basis of the pressure difference ΔPdc between the exit side and the entrance side of the outdoor expansion valve (6) such that the pressure difference ΔPdc does not exceed the prescribed back pressure threshold limit ULΔPdcH of the outdoor expansion valve (6).
Inventors:
SUZUKI KENICHI (JP)
MIYAKOSHI RYO (JP)
YAMASHITA KOHEI (JP)
MIYAKOSHI RYO (JP)
YAMASHITA KOHEI (JP)
Application Number:
PCT/JP2017/008041
Publication Date:
August 31, 2017
Filing Date:
February 21, 2017
Export Citation:
Assignee:
SANDEN AUTOMOTIVE CLIMATE SYSTEMS CORP (JP)
International Classes:
B60H1/22; B60H1/32; F25B1/00
Foreign References:
| JP2013023210A | 2013-02-04 | |||
| JP2005514253A | 2005-05-19 | |||
| JP2015223880A | 2015-12-14 | |||
| JP2003291624A | 2003-10-15 | |||
| JPH06255349A | 1994-09-13 | |||
| JPH08258544A | 1996-10-08 | |||
| JP2012006514A | 2012-01-12 |
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