Title:
AIR-CONDITIONING DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/104893
Kind Code:
A1
Abstract:
An air-conditioning device (100, 200, 300) uses, as a refrigerant for a heat source, R32, a mixed refrigerant containing R32 and HFO1234yf and having a mass percentage of R32 of 40% or more, or a mixed refrigerant containing R32 and HFO1234ze and having a mass percentage of R32 of 15% or more, comprises: a low-pressure shell-structured compressor (1) having a compression chamber in a closed container in which an opening through which the inside and outside of the closed container communicate with each other is formed; a first flow path switching valve (2); a heat source-side heat exchanger (3); first flow rate control units (9c-9e); and a plurality of use-side heat exchangers (C-E), said compressor, first flow path switching valve, heat source-side heat exchanger, first flow rate control units, and plurality of use-side heat exchangers constituting a refrigeration cycle by being connected by refrigerant pipes, and enables a heating operation in which only heating is performed on the use-side heat exchangers (C-E) side, a cooling operation in which only cooling is performed on the use-side heat exchangers (C-E) side, and a cooling/heating mixed operation in which heating and cooling are mixed on the use-side heat exchangers (C-E) side. The air-conditioning device comprises: an injection pipe (23) which connects a refrigerant circuit that constitutes the refrigeration cycle and the opening; and a second flow rate control unit (24) which is provided in the injection pipe (23) and controls the injection quantity of the refrigerant to be supplied to the compression chamber, and supplies the refrigerant circulated through the refrigeration cycle into the compression chamber via the injection pipe (23) and the opening to thereby inject the refrigerant into the compressor (1).
Inventors:
TAKENAKA NAOFUMI (JP)
WAKAMOTO SHINICHI (JP)
YAMASHITA KOJI (JP)
MORIMOTO HIROYUKI (JP)
ISHIMURA KATSUHIRO (JP)
WAKAMOTO SHINICHI (JP)
YAMASHITA KOJI (JP)
MORIMOTO HIROYUKI (JP)
ISHIMURA KATSUHIRO (JP)
Application Number:
PCT/JP2011/000518
Publication Date:
August 09, 2012
Filing Date:
January 31, 2011
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
TAKENAKA NAOFUMI (JP)
WAKAMOTO SHINICHI (JP)
YAMASHITA KOJI (JP)
MORIMOTO HIROYUKI (JP)
ISHIMURA KATSUHIRO (JP)
TAKENAKA NAOFUMI (JP)
WAKAMOTO SHINICHI (JP)
YAMASHITA KOJI (JP)
MORIMOTO HIROYUKI (JP)
ISHIMURA KATSUHIRO (JP)
International Classes:
F25B1/00; F25B29/00
Domestic Patent References:
| WO2009154149A1 | 2009-12-23 |
Foreign References:
| JP2009222363A | 2009-10-01 | |||
| JP2002107002A | 2002-04-10 | |||
| JP2003202167A | 2003-07-18 | |||
| JP2002013491A | 2002-01-18 |
Other References:
See also references of EP 2672203A4
Attorney, Agent or Firm:
KOBAYASHI, Hisao et al. (JP)
Hisao Kobayashi (JP)
Hisao Kobayashi (JP)
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Claims:
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