| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an air conditioning system designed so as to shorten rise time until blowoff of hot air when starting up heating.SOLUTION: The air conditioning system includes a compressor, a cooling/heating exchange four-way valve, an indoor heat exchanger, a throttle valve, an outdoor heat exchanger, piping and a control part. The piping forms a circulation circuit making refrigerant circulate among the compressor, the indoor heat exchanger and the outdoor heat exchanger. The compressor is placed in the circulation circuit between the outdoor heat exchanger and the indoor heat exchanger. The four-way valve is placed between the compressor and the indoor heat exchanger and between the compressor and the outdoor heat exchanger. The throttle valve is placed opposite to the indoor heat exchanger and the outdoor heat exchanger of the circulation circuit. With respect to the control part, the entropy of the refrigerant is larger at the outlet port of the compressor than that at the inlet port thereof. With respect to the temperature of the compressor, preheating operation is controlled before heating operation is started so as to become lower than a temperature of a critical point of the refrigerant.</p> |
