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Title:
WATER/HOT WATER STORAGE TYPE HOT WATER SUPPLY APPARATUS
Document Type and Number:
Japanese Patent JP2705492
Kind Code:
B2
Abstract:

PURPOSE: To reduce power for cooling operation and prevent water temperature in a cold storage tank from being abnormally raised by comparing the water temperature in the cold storage tank and fresh air temperature upon the cooling operation and controlling a cooling method of a condenser.
CONSTITUTION: Control means judges upon cooling operation whether or not water temperature T1 in a second hot water supply tank 13 detected by a stored water temperature sensor 31 is greater than a value yielded by substituting detected air temperature Ta by a fresh air temperature sensor 2 into a predetermined linear function of fresh air temperature. When it is judged to be greater, a heat exchanger 19 of a heat pump type refrigerator circuit is interrupted and an outdoor heat exchanger is operated as a condenser. Contrarily, when it is judged not to be greater, the outdoor heat exchanger is interrupted and first and third three way valves 21, 23 are both changed over so as to be communicated with the third hot water storage tank 13 to operate the heat exchanger 19 as a condenser. Hereby, cold water in the second hot water storage tank 13 is circulated with use of a pump 20 to cool the heat exchanger 19 for promotion of condensation of a refrigerant in the heat exchanger.


Inventors:
Hidehiko Kataoka
Yamazaki Yushi
Mitsuyo Uchida
Takayuki Sugimoto
Application Number:
JP1992000320465
Publication Date:
January 28, 1998
Filing Date:
November 30, 1992
Export Citation:
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Assignee:
Daikin Industries, Ltd.
International Classes:
F25B13/00; F24F5/00; F24H1/00; F24H1/18; F25B29/00; F25D13/00; (IPC1-7): F24H1/00; F24F5/00; F24H1/00; F24H1/18; F25B13/00; F25B29/00; F25D13/00
Domestic Patent References:
JP432655A
JP62192157U
JP61181244U
JP5114207Y2
Attorney, Agent or Firm:
Aoyama Ryo (1 person outside)