Patent ID: 8939826
Filing Date: 2015-01-27
Classification: F24F,Y02B

Abstract:
1. An apparatus for heating, ventilation and/or air conditioning of an interior space of a structure, the apparatus comprising: a housing comprising an exhaust air inlet, an exhaust air outlet, an outside air inlet, and a supply air outlet; a heat exchanger core arranged in the housing and comprising a first side and a second side segregated from the first side; an exhaust air chamber arranged between the exhaust air inlet and the first side of the heat exchanger core; an outside air chamber arranged between the outside air inlet and the second side of the heat exchanger core; a heating/cooling device in fluid connection with the second side of the heat exchanger core; a supply air chamber arranged between the heating/cooling device and the supply air outlet; a recirculation port arranged between the supply air chamber and the outside air chamber; and a damper mechanism that is a single device that facilitates an approximately simultaneous opening of the recirculation port and closing of the outside air inlet, and vice versa, the damper mechanism comprising a damper adapted to move between a first position in which the damper blocks the recirculation port and a second position in which the damper blocks the outside air inlet and the recirculation port is unblocked, wherein, during operation in a defrost mode when the damper is in the second position, the exhaust air is guided to flow through the exhaust air inlet and the exhaust air chamber to the first side of the heat exchanger core, the outside air is blocked from flowing through the outside air inlet, and at least a portion of supply air is guided to flow from the supply air chamber through the recirculation port and the outside air chamber to the second side of the heat exchanger core, so as to defrost the heat exchanger core.