Combination HVAC and auxiliary engine cooling
View Patent ↗A vehicle heat transfer module including a conduit for air circulation, an evaporator in the conduit between the cabin air input and cabin air output, and a heater having vehicle engine coolant circulated therethrough, the heater being in a first path between the evaporator and the cabin air output. A first door selectively opens or closes the fresh air input and fresh air output, and a second door blocks a selected amount of cabin air from the first path. A controller controls the first and second doors responsive to heating and cooling requirements. Cabin and fresh air is selectively circulated over the heater and evaporator responsive to detected requirements, including selectively either (a) circulating cabin air from the cabin air input over the evaporator and out the cabin air output, and circulating fresh air from the fresh air input over the heater and out the fresh air output, or (b) blocking the fresh air input and fresh air output and passing cabin air from the cabin air input over one or both of the evaporator and the heater and out the cabin air output.
1. 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.
2. The heat transfer module of claim 1 , wherein said evaporator is disposed over said cabin air input.
3. The heat transfer module of claim 1 , whereby said controller controls said first door to close said fresh air input and fresh air output when controlling said second door to block less than all of said cabin air from said heater.
4. The heat transfer module of claim 1 , whereby said controller controls said first door to open said fresh air input and fresh air output when controlling said second door to block all of said cabin air from said heater.
5. The heat transfer module of claim 1 , further comprising a detector detecting said heating and cooling requirements for the vehicle cabin, said detector being operably connected to said controller.
6. The heat transfer module of claim 1 , further comprising a blower adapted to selectively blow air from said conduit out said cabin air output.
7. The heat transfer module of claim 1 , further comprising a secondary blower adapted to selectively blow air in said first path from said fresh air input to said fresh air output.
8. 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;
an evaporator in said conduit between said cabin air input and cabin air output;
a heater having vehicle engine coolant circulated therethrough, said heater being in a first path between said fresh air input and said fresh air output and in a second path between said cabin air input and said cabin air output;
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 said heater; and
a controller configured to control said first and second doors responsive to heating and cooling requirements,
wherein
said conduit defines a third path between said cabin air input and said cabin air output, wherein said evaporator is in said third path and said third path does not include said first path, and
said second door is controllably moveable between a first position blocking said first path from said third path and a plurality of other positions in which selected amounts of cabin air in said third path are diverted to said second path.
9. The heat transfer module of claim 8 , wherein said other positions of said second door each divert a different selected amount of cabin air in the third path to said second path, and said second door is pivotable between said first position and said second positions.