| 摘要 |
An air conditioning system 100 may include a compressor 101 having a driving chamber 110, a cooling circuit 151, a heating circuit 152 and capacity controllers 301, 401. The compressor 101 may have a suction port 115, a discharge port 120, a driving unit 130 provided within the driving chamber 110. The driving unit 130 decreases compressor output discharge capacity when pressure within the driving chamber 110 increases. The first capacity controller 301 and the second capacity controller 401 are provided in series onto the capacity control passage 321, 323, 421. The first capacity controller 301 opens the capacity control passage 321, 323 when compressor suction pressure Ps results predetermined low-pressure state during operation of the cooling circuit 151 and the second capacity controller 401 opens the capacity control passage 323, 421 during operation of the cooling circuit. As the result, the heat exchanger 159 in the cooling circuit 151 is prevented from being frosted. The first capacity controller 301 opens the capacity control passage 321, 323 during operation of the heating circuit 152 and the second capacity controller 401 opens the capacity control passage 323, 421 when compressor discharge pressure Pd results predetermined high-pressure state during operation of the heating circuit 152. As the result, the heating circuit 152 is prevented from being damaged by an abnormally high discharge pressure. <IMAGE> |
