Abstract: An HVAC module may include an air path through which air is flowable, an evaporator, and a heater. The evaporator and the heater may subdivide the air path into a main path and a side path. The main path may pass through the evaporator and the heater. The side path may branch off from the main path upstream of the evaporator and may open into the main path downstream of the heater. The side path may be fluidically connected to the main path between the evaporator and the heater. A first valve flap may be arranged in the air path and may be adjustable to a closed position and to an open position. A second valve flap may be arranged in the air path and may be adjustable to a first position, to a second position, and to a third position.

Abstract: An HVAC module may include an air path through which air is flowable, an evaporator, and a heater. The evaporator and the heater may subdivide the air path into a main path and a side path. The main path may pass through the evaporator and the heater. The side path may branch off from the main path upstream of the evaporator and may open into the main path downstream of the heater. The side path may be fluidically connected to the main path between the evaporator and the heater. A first valve flap may be arranged in the air path and may be adjustable to a closed position and to an open position. A second valve flap may be arranged in the air path and may be adjustable to a first position, to a second position, and to a third position.

Abstract: An air-conditioning system for air-conditioning an interior of a vehicle may include a fan for driving air. The system may include a control device that may include a circulating air inlet for drawing in circulating air from the interior, a fresh air inlet for drawing in fresh air from an environment of the vehicle, and an air outlet. The control device may include a control valve adjustable between a circulating position and a fresh air position. The control valve may include at least one non-return check valve. The non-return check valve may permit a flow to pass through the control valve in one direction and block the flow in an opposite direction.

Abstract: An air-conditioning system for air-conditioning an interior of a vehicle may include a fan for driving air. The system may include a control device that may include a circulating air inlet for drawing in circulating air from the interior, a fresh air inlet for drawing in fresh air from an environment of the vehicle, and an air outlet. The control device may include a control valve adjustable between a circulating position and a fresh air position. The control valve may include at least one non-return check valve. The non-return check valve may permit a flow to pass through the control valve in one direction and block the flow in an opposite direction.