Patent ID: 7836716
Filing Date: 2010-11-23
Classification: B60H

Abstract:
1. A refrigerant cycle device for a vehicle, comprising: an evaporator for cooling air to be blown into a compartment of the vehicle; a compressor, driven by a vehicle engine through a power transmission mechanism, for drawing and compressing gas refrigerant evaporated in the evaporator; a control unit for controlling a discharge capacity of the compressor; and a variable displacement mechanism, which is configured to vary the discharge capacity of the compressor based on a control value from the control unit and a suction pressure of the compressor, to cause the suction pressure of the compressor to approach a predetermined suction pressure, wherein the variable displacement mechanism increases the discharge capacity of the compressor when the suction pressure of the compressor increases, and wherein the variable displacement mechanism decreases the discharge capacity of the compressor when the control value from the control unit decreases, wherein the control unit includes a determining means for determining an acceleration state of the vehicle engine, a detecting member which detects a thermal load of the evaporator, a setting means for setting an acceleration state value of the control value, in accordance with the thermal load detected by the detecting member, when the determining means determines the acceleration state of the vehicle engine, wherein the setting means causes the acceleration state value to decrease as the thermal load increases, and a controlling means for reducing the control value applied to the variable displacement mechanism from a value that was set prior to the reduction to the acceleration state value set by the setting means and subsequently returns the control value from the acceleration state value to the value that was set prior to the reduction, when the determining means determines the acceleration state of the vehicle engine.