Title:
HEAT PUMP TYPE WATER HEATER
Document Type and Number:
WIPO Patent Application WO/2003/064942
Kind Code:
A1
Abstract:
A heat pump type water heater, comprising a compressor (25), a water heat exchanger (26) for heating hot water, an electric expansion valve (27), and an air heat exchanger (28) sequentially connected to each other, and a defrost circuit (38) for feeding hot gas from the compressor (25) to the air heat exchanger (28), wherein defrost operation is started to feed the hot gas from the compressor (25) to the air heat exchanger (28) and, when a specified time is passed after the start, the electric expansion valve (27) is closed to a specified opening.
Inventors:
NAKAYAMA HIROSHI (JP)
SAKAMOTO SHINICHI (JP)
SAKAMOTO SHINICHI (JP)
Application Number:
PCT/JP2003/000702
Publication Date:
August 07, 2003
Filing Date:
January 27, 2003
Export Citation:
Assignee:
DAIKIN IND LTD (JP)
NAKAYAMA HIROSHI (JP)
SAKAMOTO SHINICHI (JP)
NAKAYAMA HIROSHI (JP)
SAKAMOTO SHINICHI (JP)
International Classes:
F24H4/04; F25B1/00; F25B9/00; F25B30/02; F24H1/00; F25B40/00; F25B47/02; (IPC1-7): F25B47/02; F24H1/00; F25B1/00; F25B30/02
Foreign References:
| JPS6129649A | 1986-02-10 | |||
| JPH10220932A | 1998-08-21 | |||
| JPH04217754A | 1992-08-07 | |||
| JPH0387578A | 1991-04-12 | |||
| JP2001263812A | 2001-09-26 | |||
| JP2993180B2 | 1999-12-20 | |||
| JPH11304309A | 1999-11-05 |
Other References:
See also references of EP 1484561A4
Attorney, Agent or Firm:
Maeda, Hiroshi (4-8 Utsubohonmachi 1-chome, Nishi-k, Osaka-shi Osaka, JP)
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