Patent ID: 6263687
Filing Date: 2001-07-24
Classification: B60H,F04B,F25B

Abstract:
An air conditioning system comprising:a compressor having a suction port, a discharge port, a driving unit provided within the compressor driving chamber, the driving unit decreasing compressor output discharge capacity when pressure within the driving chamber increases,a cooling circuit having a condenser and a heat exchanger provided on a passage extending from the discharge port to the suction port,a heating circuit having a passage extending from the discharge port to the heat exchanger,first and second capacity controllers provided in series onto the capacity control passage between the discharge port and the driving chamber,wherein the first capacity controller opens the capacity control passage when compressor suction pressure results predetermined low-pressure state during operation of the cooling circuit and the second capacity controller opens the capacity control passage during operation of the cooling circuit andwherein the first capacity controller opens the capacity control passage during operation of the heating circuit and the second capacity controller opens the capacity control passage when compressor discharge pressure results predetermined high-pressure state during operation of the heating circuit.