| 摘要 |
PURPOSE:To make use of a heat exchanger effectively, by providing one of heat exchangers of a heat pump in a water tank and a heat exchanger having an identical function with the foregoing heat exchanger and a heat exchanger having an opposite function to that of the foregoing heat exchanger are arranged respectively in two air ducts switchable to indoors and outdoors. CONSTITUTION:A heat exchanger 4 is provided in a space 3 of a cistern 1 divided by a partition wall 2, both ends of a duct of the heat exchanger 4 are taken out of the water tank 1 by making them penetrate through the water tank 1 in a liquid-tight state and one end of the duct is connected with a heat exchanger 6 whose function is identical with that of the heat exchanger 4. The other end of the heat exchanger 5 is connected with a heat exchanger 8 having an opposite function to that of the heat exchanger 5 through an expansion valve 7 and both the heat exchangers 6 and 8 are installed respectively in air ducts A and B formed within a duct switchablly to indoors and outdoors. On the one hand, a heat pump is constituted by enclosing a thermal medium by making connection to be made between the other end of the heat exchanger 4 and the other end of the heat exchanger 8 through a four-way valve into a closed circuit. With this construction, heat to be discharged outdoor is used for heating of the water tank 1 at the time of cooling and while on the other hand, waste heat of the water tank 1 can be used for acceleration of heating efficiency. |
