HEAT-PUMP WATER HEATER

A heat-pump water heater includes a refrigerant circuit, a water circuit, and a controller. The refrigerant circuit includes a main circuit and a bypass circuit. The main circuit includes a compressor, a water heat exchanger, a first pressure-reducing device, an air heat exchanger, and an air-sendin...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	KAWANO, Kosuke, KADOWAKI, Kimitaka
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING COMBINED HEATING AND REFRIGERATION SYSTEMS FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEATGENERATING MEANS, IN GENERAL HEAT PUMP SYSTEMS HEATING LIGHTING LIQUEFACTION SOLIDIFICATION OF GASES MANUFACTURE OR STORAGE OF ICE MECHANICAL ENGINEERING RANGES REFRIGERATION MACHINES, PLANTS OR SYSTEMS REFRIGERATION OR COOLING VENTILATING WEAPONS
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Beschreibung
Zusammenfassung:	A heat-pump water heater includes a refrigerant circuit, a water circuit, and a controller. The refrigerant circuit includes a main circuit and a bypass circuit. The main circuit includes a compressor, a water heat exchanger, a first pressure-reducing device, an air heat exchanger, and an air-sending device. The bypass circuit includes a second pressure-reducing device. The water circuit includes a hot water tank, a water pump, and the water heater exchanger. In a night-time hot-water supply mode, the controller causes the water pump with a lowest frequency set in advance, causes the compressor with a lowest frequency set in advance, and stops the air-sending device.