Title:
Heat pump hot-water supply machine
Document Type and Number:
Japanese Patent JP6191010
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a heat pump water heater capable of performing a freezing preventive operation, even when abnormality and the like occurs in a heat pump cycle.SOLUTION: A heat pump water heater includes: a heat pump cycle having a radiator 21; a hot water storage tank 25; a circulation pump 26 for sending water in a lower part of the hot water storage tank 25 to the radiator 21; a boiling circuit having an upper side flow passage 27 for communicating the radiator 21 and an upper part of the hot water storage tank 25 and a lower side flow passage 28 for communicating the radiator 21 and the lower part of the hot water storage tank 25; and flow passage switching means 29 for switching the upper side flow channel 27 and the lower side flow channel 28. The heat pump water heater at least executes: a first freezing preventive operation mode in which the flow passage is switched to the lower side flow passage 28, the heat pump cycle and the circulation pump 26 are operated, and hot water is circulated in the boiling circuit; and a second freezing preventive operation mode in which the flow passage is switched to the upper side flow passage 27, the heat pump cycle is stopped, the circulation pump 26 is operated, and the hot water is circulated in the boiling circuit.
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Inventors:
Takanobu Fujimoto
Hiroyuki Funabashi
Northwest Expo
Hiroshi Shibata
Hiroyuki Funabashi
Northwest Expo
Hiroshi Shibata
Application Number:
JP2013250814A
Publication Date:
September 06, 2017
Filing Date:
December 04, 2013
Export Citation:
Assignee:
Panasonic IP Management Co., Ltd.
International Classes:
F24H1/18; F24H4/02
Domestic Patent References:
| JP2007155171A | ||||
| JP2013170788A | ||||
| JP2003214700A | ||||
| JP2004257583A |
Foreign References:
| EP1455145A1 |
Attorney, Agent or Firm:
Kenji Kamada
Hiroo Maeda
Hiroo Maeda