Patent ID: 9377014
Filing Date: 2016-06-28
CPC Classification: B60H,F04B,F25B

Claim Text:
1. An apparatus for interrupting operation of a compressor upon start up for use in a vehicle air conditioning system having a compressor, an electrically operated compressor clutch and a control for energizing the compressor clutch during normal A/C operation through a power lead connected between the control and the clutch, the clutch also having a ground lead, comprising: a switch connected to the power lead between the control and the clutch and connected to the ground lead between the clutch and a ground, the switch intermittently operating the clutch for a predetermined period of time each time the control provides power through the power lead to operate the clutch, the switch permitting continuous operation of the clutch after the predetermined period of time while power is provided through the power lead; the switch having a microcontroller for generating an output signal intermittently between a first level and a second level when the control initially provides power to operate the clutch for the predetermined period and then subsequently maintaining the output signal at the first level while the control provides power to operate the clutch; the switch further having a power transistor connected in the ground lead between the clutch and ground, an output signal at the first level switching on the power transistor to connect the ground lead from the clutch to the ground to permit operation of the clutch.