Automotive air conditioning apparatus

An automotive air conditioning apparatus, comprising:

• an input shaft for coupling to an engine;
• a pump unit disposed on said input shaft;
• a compressor unit disposed on said input shaft;
• and
• a separator wall disposed between said pump unit and said compressor unit and adapted to seal therebetween in the axial direction of said input shaft;
• said pump unit including:
• a first rotary driving member installed to said input shaft and accommodated in an enclosed space formed therein;
• a viscous fluid sealed in said enclosed space;
• a suction space and a discharge space which said viscous fluid is sucked into and discharged out as said first rotary member rotates, and which are communicated with each other by way of a throttle;
• a first short-circuiting passage communicating said suction space and said discharge space;
• and
• a water jacket disposed outside said enclosed space and adapted to convert heat generated by said viscous fluid into temperature increments of circulating water;
• said compressor unit including:
• a second rotary driving member installed to said input shaft and accommodated in an enclosed area formed therein;
• a suction chamber and a discharge chamber which a refrigerant gas is sucked into and discharged out from;
• a suction area and a discharge area which are defined in said enclosed area, and which vary volumetrically as said second rotary member rotates, the suction area adapted to suck said refrigerant gas from said suction chamber, the discharge area adapted to compress and discharge said refrigerant gas to said discharge chamber;
• and
• a second short-circuiting passage communicating said suction chamber and said discharge chamber or said suction area and said discharge area;
• said first short-circuiting passage including a first control valve adapted to selectively open and close said first short-circuiting passage;
• said second short-circuiting passage including a second control valve adapted to selectively open and close said second short-circuiting passage.