Heat pump type hot water supplying device
AssigneeSanden Living & Environmental Systems Corporation
InventorsHayahiko TAKAGI, Hiroshi YAMAGATA
Life of this patent
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Abstract
The present invention provides a heat pump type hot water supplying device that has solved the inconvenience of an antifreeze operation being not carried out due to the phenomenon of a backflow from a hot water storage tank without increasing the number of components. A control device 70 carries out an antifreeze operation, in which a water pump 23 is operated, if the temperature of water for hot water supply in a hot water supply circuit 20 positioned in a heating unit 50 decreases to a predetermined value or less. The water pump 23 is operated if the temperature of the water for hot water supply in the hot water supply circuit 20 positioned in the heating unit 50 increases while the water pump 23 is in a stopped state.
Claims9
A heat pump type hot water supplying device comprising:
- a heating unit provided with a heat pump circuit formed by connecting a compressor, a water heat exchanger, a decompressor and an evaporator;
- a tank unit provided with a hot water storage tank for storing water for hot water supply;
- a hot water supply circuit in which the water for hot water supply in the hot water storage tank is taken out from a lower part of the hot water storage tank by a water pump, circulated into the water heat exchanger and led into an upper part of the hot water storage tank;
- and
- a control device which carries out a boiling operation for heating, by a refrigerant, the water for hot water supply, which circulates through the water heat exchanger, by operating the water pump and the compressor,
- wherein the control device carries out an antifreeze operation, in which the water pump is operated, in the case where the temperature of the water for hot water supply in the hot water supply circuit positioned in the heating unit decreases to a predetermined value or lower, and
- operates the water pump in the case where the temperature of the water for hot water supply in the hot water supply circuit positioned in the heating unit increases while the water pump is in a stopped state.
Dependencies are inferred from the claim text.