Title:
AIR CONDITIONER
Document Type and Number:
WIPO Patent Application WO/2017/042967
Kind Code:
A1
Abstract:
Provided is a simultaneous cooling/heating multi-air conditioner wherein a reduction in operating efficiency is prevented. This air conditioner has a plurality of indoor units (40), and is capable of a simultaneous cooling operation and heating operation by switching cooling/heating switching units (30) connected to the indoor units (40). The air conditioner is equipped with: a high/low pressure gas pipe expansion valve (31) which is provided to each of the cooling/heating switching units (30) so as to adjust the supply of a high-temperature and pressure gas refrigerant to the indoor units (40); and a refrigeration cycle control unit (300) which adjusts, according to the determination result of excess or deficiency of the refrigerant in the refrigeration cycle, the opening degree of the high/low pressure gas pipe expansion valve (31) of the cooling/heating switching unit (30) connected to an indoor unit that is not in heating operation.
Inventors:
NAITO KOJI (JP)
URATA KAZUMOTO (JP)
TANI KAZUHIKO (JP)
MUROFUSHI MASAYOSHI (JP)
YASUDA GEN (JP)
URATA KAZUMOTO (JP)
TANI KAZUHIKO (JP)
MUROFUSHI MASAYOSHI (JP)
YASUDA GEN (JP)
Application Number:
PCT/JP2015/075868
Publication Date:
March 16, 2017
Filing Date:
September 11, 2015
Export Citation:
Assignee:
JOHNSON CONTROLS-HITACHI AIR CONDITIONING TECH (HOHG KONG) LTD (CN)
International Classes:
F25B29/00; F25B13/00
Foreign References:
| JP2011208928A | 2011-10-20 | |||
| JP2004278813A | 2004-10-07 |
Other References:
See also references of EP 3348934A4
Attorney, Agent or Firm:
ISONO INTERNATIONAL PATENT OFFICE, P.C. (JP)
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