| 摘要 |
PURPOSE:To accumulate a heating calorie in a heat accumulative tank within a short period of time and increase a defrosting capability by a method wherein a heat pump type air condition is provided with a bypassing circuit of which one end is connected to a discharging pipe extending from a discharged side of a compressor to a four-way valve and the other end is connected from the four-way valve to an indoor heat exchanger, and the bypassing circuit is connected to the heat accumulative tank in a heat exchanging manner. CONSTITUTION:During a heating operation, the second two-way valve 14 is opened, one refrigerant from a compressor 1 is flowed to a four-way valve 2 and the other refrigerant passes through the second two-way valve 14 and gives heat to a heat accumulative material 11 of a heat accumulative tank 10. The other refrigerant is merged with refrigerant passed through the four-way valve 2 and flows toward an indoor heat exchanger 3. A two-way valve 7 is closed. During a defrosting operation, the second two-way valve 14 is closed, the two-way valve 7 is opened, the refrigerant is flowed in the first bypassing circuit 6, heat is removed by a heat accumulative material 11, the refrigerant passes through a check valve 8, the refrigerant is merged with the refrigerant passed through a pressure reducing device 4 and then the refrigerant is flowed toward an outdoor heat exchanger 5. After defrosting operation, the refrigerant passes through the four-way valve 2 and is absorbed into the compressor 1. In this way, heat radiated from the compressor 1 toward the surrounding air and heat from hot refrigerant heat in the second bypassing circuit 13 are concurrently recovered, heat can be accumulated in the heat accumulative tank 10 within a short period of time and then heating calorie required during a defrosting operation can be sufficiently assured. |
