Heat pump-type cooling/heating system

Abstract

A heat pump-type cooling/heating system of the present invention includes a refrigeration circuit, a hot water generating means and an indoor heat exchanger assisting means. In the refrigeration circuit, a compressor, a four-way valve, an indoor heat exchanger, a cooling expansion valve, a heating expansion valve, an outdoor heat exchanger and the four-way valve are connected in a sequence by a refrigerant conduit. The four-way valve and the compressor are connected by a suction conduit. The hot water generating means includes a bypass conduit and a double tube-type heat exchanger. The double tube-type heat exchanger has a condensation tube which is provided in a storage reservoir, and a heat medium heating conduit inserted into the condensation tube. The indoor heat exchanger assisting means includes an auxiliary heat exchanger which is located beside the indoor heat exchanger and connected to the heat medium heating conduit by a supply conduit provided and by a return conduit.

1 . A heat pump-type cooling/heating system, comprising:
 a refrigeration cycle in which a compressor, a four-way valve, an indoor heat exchanger, a cooling expansion valve, a heating expansion valve, an outdoor heat exchanger and the four-way valve are connected in a sequence by a refrigerant conduit, and the four-way valve and the compressor are connected to each other by a suction conduit;   hot water generating means comprising: a bypass conduit connected to the refrigerant conduit between the compressor and the four-way valve; and a double tube-type heat exchanger having a condensation tube provided on the bypass conduit, the condensation tube being installed in a storage reservoir, and a heat medium heating conduit inserted into the condensation tube; and   indoor heat exchanger assisting means comprising: an auxiliary heat exchanger located beside the indoor heat exchanger, the auxiliary heat exchanger being connected to the heat medium heating conduit by a supply conduit provided with a circulation pump and by a return conduit to form a closed loop.   
     
     
         2 . A heat pump-type cooling/heating system, comprising:
 a refrigeration cycle in which a compressor, a four-way valve, an indoor heat exchanger, a cooling expansion valve, a heating expansion valve, an outdoor heat exchanger and the four-way valve are connected in a sequence by a refrigerant conduit, and the four-way valve and the compressor are connected to each other by a suction conduit;   hot water generating means comprising: a bypass conduit connected to the refrigerant conduit between the compressor and the four-way valve; and a double tube-type heat exchanger having a condensation tube provided on the bypass conduit, the condensation tube being installed in a storage reservoir, and a heat-medium heating conduit inserted into the condensation tube;   indoor heat exchanger assisting means comprising: an auxiliary heat exchanger located beside the indoor heat exchanger, the auxiliary heat exchanger being connected to the heat-medium heating conduit by a supply conduit provided with a circulation pump and by a return conduit to form a closed loop; and   radiant heat generating means connected to the supply conduit and the return conduit, the radiant heat generating means being installed in a place where the indoor heat exchanger is located.   
     
     
         3 . The heat pump-type cooling/heating system of  claim 1 , wherein the double tube-type heat exchanger has a zigzag shape. 
     
     
         4 . The heat pump-type cooling/heating system as set forth in  claim 2 , wherein the radiant heat generating means comprises any one selected from the group consisting of a fan coil unit, a radiator and a radiating coil mounted to a floor. 
     
     
         5 . The heat pump-type cooling/heating system of  claim 2 , wherein the double tube-type heat exchanger has a zigzag shape.