Patent ID: 6508071
Filing Date: 2003-01-21
Classification: F04B

Abstract:
An air conditioning apparatus provided with a refrigerant circuit including a variable displacement compressor, comprising:a displacement control mechanism, which controls the displacement of the compressor in relation to a pressure difference between a first pressure monitoring point and a second pressure monitoring point in the refrigerant circuit such that the pressure difference seeks a predetermined target value, wherein the second pressure monitoring point is located downstream of the first pressure monitoring point, and the displacement control mechanism has an altering device for altering the target value; a first pressure introducing passage, which introduces the pressure at the first pressure monitoring point to the displacement control mechanism, wherein the first pressure monitoring point and the first pressure introducing passage form a high pressure zone; a second pressure introducing passage, which introduces the pressure at the second pressure monitoring point to the displacement control mechanism, wherein the second pressure monitoring point and the second pressure introducing passage form a low pressure zone; an adjusting line, which connects the high pressure zone to the low pressure zone; and an adjusting valve, which adjusts the opening size of the adjusting line.