| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a heat pump type hot water heating device capable of preventing degradation of heating performance in switching a three-way valve. <P>SOLUTION: The heat pump type hot water heating device includes a refrigerating cycle configured by successively annularly connecting a compressor (not shown), a four-way valve (not shown) for switching a refrigerant flow channel, a water-refrigerant heat exchanger (not shown) for exchanging heat between a high-temperature refrigerant and water, a pressure reducing device (not shown), and an outdoor heat exchanger (not shown) for exchanging heat between the refrigerant and air, and a water circuit configured by connecting the water-refrigerant heat exchanger, a heating terminal (not shown) for heating the air by high-temperature water produced by the water-refrigerant heat exchanger, a hot water supply tank (not shown) for storing the hot water for hot water supply, a hot water pump (not shown) for distributing the high-temperature water to the heating terminal or the hot water supply tank, and the three-way valve (not shown) for switching the flow of high-temperature water to the heating terminal or the hot water supply tank, and a frequency of the compressor is controlled according to a temperature of the air passing through the outdoor heat exchanger, and a temperature of the water flowing to the water-refrigerant heat exchanger. As the device can cope with sudden change of water temperature, it is unnecessary to stop the compressor in switching the three-way valve, and the degradation of heating performance can be prevented. <P>COPYRIGHT: (C)2012,JPO&INPIT |
