Patent ID: 7128141

Claim:
A vehicle heat transfer module, comprising: a conduit for air circulation, said conduit including an input and output for vehicle cabin air and an input and output for fresh air; a first door disposed to selectively open or close said fresh air input and fresh air output; a second door disposed to block a selected amount of cabin air from a heater; a controller configured to control said first and second doors responsive to heating and cooling requirements such that in a first condition said first door opens said fresh air input and output for flow of fresh air in a first path between said fresh air input and said fresh air output, and said second door substantially separates said first path from a second path in said conduit between said cabin air input and said cabin air output, and in other conditions said first door closes said fresh air input and said fresh air output, and said second door directs selected amounts of said cabin air from said path to an alternate path; an evaporator in said second path; and said heater having vehicle engine coolant circulated therethrough, said heater being in said first path and said alternate path.