Work vehicle hvac control based on operator seat direction

In a work vehicle having a cabin in which is disposed a seat assembly having a rotating seat, and further having an HVAC system with at least a first duct for delivering air through at least one vent to a first area of the cabin and a second duct for delivering air through at least one vent to a second area of the cabin distinct from the first area, an HVAC control system comprising:

• a door disposed in each duct and configured to move between a fully open position, allowing maximum flux of air into the duct, and a fully closed position that completely occludes the duct;
• a control module operatively coupled to each door to move the door between at least the fully open and fully closed positions;
• a marker configured to rotate with the seat;
• and
• at least one detector for detecting whether the seat is in a first operational position or a second operational position, the detector being electrically coupled to the control module for transmitting, to the control module, a position output signal indicating a position of the seat;
• wherein the control module moves the door of each duct according to the position output signal.

In a work vehicle having a cabin in which is disposed a seat assembly having a rotating seat, and further having an HVAC system with a forward duct for delivering air through at least one vent to a front area of the cabin and a rearward duct for delivering air through at least one vent to a rear area of the cabin, an HVAC control system comprising:

• a marker attached to a rotating structure within the seat assembly, the seat being mounted on the rotating structure;
• at least one detector attached to a stationary structure within the seat assembly that does not rotate with the seat, the detector being configured to detect a position of the marker and generate a position output signal that indicates the position of the seat;
• a first mode door assembly attached to the forward duct and comprising:
• a housing attached to the forward duct;
• a first mode door movably mounted within the housing;
• and
• an actuator attached to the housing and the first mode door for moving the first mode door between an open position that allows air into the forward duct and a closed position that occludes the forward duct;
• a second mode door assembly attached to the rearward duct and comprising:
• a housing attached to the rearward duct;
• a second mode door movably mounted within the housing;
• and
• an actuator attached to the housing and the second mode door for moving the second mode door between an open position that allows air into the rearward duct and a closed position that occludes the rearward duct;
• and
• a control module electrically connected to the detector for receiving the position output signal, and electrically connected to each of the first and second actuators to drive the actuators to move each of the first and second mode doors in response to the position output signal;
• wherein the position of the seat may comprise a first operational position or a second operational position.