Title:
HEAT-PUMP WATER HEATER AND AIR CONDITIONER
Document Type and Number:
WIPO Patent Application WO/2010/119920
Kind Code:
A1
Abstract:
Provided is a heat-pump water heater and air conditioner having an expanded operable range when operating in heater mode. The heat-pump water heater and air conditioner has a water system that receives heat from a refrigerant system in the heat-pump, thereby producing hot water, and the refrigerant system is provided with an electronic expansion valve for cooling and an electronic expansion valve for heating in series. The heat-pump water heater and air conditioner is provided with ambient air temperature-responsive control which is activated when, during a heating cycle, the aperture of the electronic expansion valve for heating is set to a prescribed value or higher. The ambient air temperature responsive control comprises A-zone control, which is selected when the detected ambient air temperature (To) is equal to or greater than a prescribed comparison temperature (Tc), and B-zone control, which is selected when the detected ambient air temperature (To) is less than the prescribed comparison temperature (Tc). Through two levels of aperture control, A-zone control and B-zone control, the electronic expansion valve for cooling brings the actual degree of supercooling (Tsc) closer to a target degree of supercooling (Tsct).
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Inventors:
TAKEUCHI NOBUYUKI (JP)
YAMADA HIROYUKI (JP)
OMURA MINEMASA (JP)
YAMADA HIROYUKI (JP)
OMURA MINEMASA (JP)
Application Number:
PCT/JP2010/056751
Publication Date:
October 21, 2010
Filing Date:
April 15, 2010
Export Citation:
Assignee:
MITSUBISHI HEAVY IND LTD (JP)
TAKEUCHI NOBUYUKI (JP)
YAMADA HIROYUKI (JP)
OMURA MINEMASA (JP)
TAKEUCHI NOBUYUKI (JP)
YAMADA HIROYUKI (JP)
OMURA MINEMASA (JP)
International Classes:
F25B1/00; F24H1/00; F25B30/02
Foreign References:
| JPH10306952A | 1998-11-17 | |||
| JPH0239179Y2 | 1990-10-22 | |||
| JPH07269964A | 1995-10-20 | |||
| JPH0914780A | 1997-01-17 | |||
| JP2007064510A | 2007-03-15 | |||
| JPH0239179A | 1990-02-08 |
Other References:
See also references of EP 2420758A4
Attorney, Agent or Firm:
FUJITA, Takaharu et al. (JP)
Takaharu Fujita (JP)
Takaharu Fujita (JP)
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