| 摘要 |
PURPOSE: A heat pump system utilizing air as a heat source is provided to increase a coefficient of performance by favorably evaporating refrigerant liquid in an outdoor heat exchanger if the air temperature is low in a heating operation and to additionally increase the coefficient of performance by dry-saturating and overheating-vaporizing refrigerant steam sucked into a compressor. CONSTITUTION: A heat pump system is composed of a basic cooling circuit(1), a hot water heating circuit(10), a heat storage(20), a heat exchanger(30), and first and second heat exchangers(40,41). The basic cooling circuit connects a compressor(2), a 4-way valve(3), an indoor heat exchanger(4), a cooling expansion valve(5), a heating expansion valve(6), and an outdoor heat exchanger(7) to a conduit(8) by turns and connects the 4-way valve and the compressor to a suction conduit(9). The hot water heating circuit is coupled between the compressor and the 4-way valve of the conduit. The heat storage is installed between the cooling and heating expansion valves of the conduit to charge a heat medium(21) and the heat storage embeds a heating heat-exchanger(23) connected to the hot water heating circuit and a re-condensing heat exchanger(22) installed between the cooling and heating expansion valves of the conduit. The heat exchanger is connected to the heat storage by a return pipe(32) installed with a supply pipe(31) and a circulating pump(33) and is disposed to the suction side of the outdoor heat exchanger. The first and second heat exchangers are mounted parallel to the suction conduit, one of the heat exchangers is installed to the outside of the heat storage, and another is embedded in the heat storage to selectively act to the temperature of the refrigerant steam sucked into the compressor.
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