Title:
AIR CONDITIONER AND METHOD FOR OPERATING AIR CONDITIONER
Document Type and Number:
WIPO Patent Application WO/2014/156313
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing an air conditioner that uses R32 as a refrigerant and that can reduce the load on a compressor, and a method for operating an air conditioner. Provided is an air conditioner (1), having: a refrigeration cycle in which at least a compressor (14), an outdoor heat exchanger (11), an indoor heat exchanger (21), an outdoor expansion valve (13), and an indoor expansion valve (23) are connected, and refrigerant containing 70 wt% or more of R32 is circulated; and a controller (1a). An upper limit, which regulates the pressure ratio of the compressor (14) so that the dryness fraction of the refrigerant in the intake side of the compressor (14) during operation is higher than 0.85, is set so as to decrease as the intake pressure of refrigerant in the compressor (14) increases. A method for operating the air conditioner (1) is also provided. When the air conditioner (1) is operating, the controller (1a) has the characteristic of adjusting the rotational speed of the compressor (14) so that the pressure ratio is less than the upper limit.
Inventors:
YOKOZEKI ATSUHIKO (JP)
TSUBOE HIROAKI (JP)
TADA SHUUHEI (JP)
NONAKA MASAYUKI (JP)
TSUBOE HIROAKI (JP)
TADA SHUUHEI (JP)
NONAKA MASAYUKI (JP)
Application Number:
PCT/JP2014/052612
Publication Date:
October 02, 2014
Filing Date:
February 05, 2014
Export Citation:
Assignee:
HITACHI APPLIANCES INC (JP)
International Classes:
F25B1/00; F24F11/02; F25B13/00
Foreign References:
| JP2001227822A | 2001-08-24 | |||
| JPH08313070A | 1996-11-29 | |||
| JP2001194015A | 2001-07-17 | |||
| JP2003240310A | 2003-08-27 | |||
| JPS6222962A | 1987-01-31 | |||
| JP2003262385A | 2003-09-19 | |||
| JPH07286761A | 1995-10-31 |
Attorney, Agent or Firm:
INOUE Manabu et al. (JP)
Manabu Inoue (JP)
Manabu Inoue (JP)
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