An air handler includes a housing with a heat exchanger core. The housing includes a faceplate, a roof panel, a base panel, a first side panel, and a second side panel. A first tunnel and a second tunnel are connected to the housing at the faceplate. A septum protrudes from the faceplate and connects the core at a front edge. The air handler further includes a first recirculation path and a second recirculation path inside the housing. The first and second recirculation paths are defined by the septum, the housing, and the core. The first and second recirculation paths are configured to direct a portion of airflow from the first tunnel to the second tunnel. The air handler further includes a first damper and a second damper disposed on the faceplate and configured to obstruct the first recirculation path and the second recirculation path respectively.

An energy recapturing apparatus is disclosed. The energy recapturing apparatus is housed within a frame that is configured to fit within a preexisting fluid passageway. The frame is further attached to a sliding mechanism, which enables the frame to be easily removed from the preexisting fluid passageway. Further, the frame is configured to accept at least one turbine that contains a plurality of blades. The turbine is able to convert the energy of fluid movement into electricity.

An energy recapturing apparatus is disclosed. The energy recapturing apparatus is housed within a frame that is configured to fit within a preexisting fluid passageway. The frame is further attached to a sliding mechanism, which enables the frame to be easily removed from the preexisting fluid passageway. Further, the frame is configured to accept at least one turbine that contains a plurality of blades. The turbine is able to convert the energy of fluid movement into electricity.

An air conditioner may include an outdoor unit including a compressor and an outdoor heat exchanger configured to heat exchange compressed refrigerant; an indoor unit having an air inlet and an air outlet and connected with the outdoor unit through a first pipe through which refrigerant discharged from the compressor flows and a second pipe through which refrigerant discharged from the outdoor heat exchanger flows; a blowing fan disposed in the indoor unit; a main heat exchanger configured to heat exchange air, which flows inside through the air inlet, and connected with the second pipe; a reheat exchanger disposed downstream of the main heat exchanger and connected with the first pipe; and a waste heat exchanger disposed upstream of the main heat exchanger and configured to heat-exchange air, which flows inside through the air inlet, and condensate water, which is produced at the main heat exchanger, with each other. Accordingly, air flowing inside through the air inlet is primarily cooled before exchanging heat through the main heat exchanger, whereby the cooling and dehumidifying performance is improved.

An air conditioner may include an outdoor unit including a compressor and an outdoor heat exchanger configured to heat exchange compressed refrigerant; an indoor unit having an air inlet and an air outlet and connected with the outdoor unit through a first pipe through which refrigerant discharged from the compressor flows and a second pipe through which refrigerant discharged from the outdoor heat exchanger flows; a blowing fan disposed in the indoor unit; a main heat exchanger configured to heat exchange air, which flows inside through the air inlet, and connected with the second pipe; a reheat exchanger disposed downstream of the main heat exchanger and connected with the first pipe; and a waste heat exchanger disposed upstream of the main heat exchanger and configured to heat-exchange air, which flows inside through the air inlet, and condensate water, which is produced at the main heat exchanger, with each other. Accordingly, air flowing inside through the air inlet is primarily cooled before exchanging heat through the main heat exchanger, whereby the cooling and dehumidifying performance is improved.

A displacement ventilation system for a room includes a first duct located inside the room and extending between a floor and a ceiling of the room, an air inlet coupled with the first duct for drawing air into the system, and an elongated diffuser extending adjacent the floor for diffusing at least some of the outside air over the floor of the enclosed spaced. The system includes a return air duct extending adjacent the ceiling and being coupled with the first duct for removing return air from the room and advancing the return air toward the first duct, and a heat exchanger for transferring thermal energy between the return air and the outside air. The heat exchanger has one or more heat conductive air filtration substrates integrated therein for conducting heat. A heat pump changes a temperature level of the outside air or the return air passing through the heat pump.

Heat exchange element is heat exchange element where heat exchange element pieces each of which includes heat transfer plate with heat conductivity and a plurality of ribs provided on one surface of heat transfer plate are laminated to alternately form exhaust air passage and supply air passage, and exhaust air flow flowing in exhaust air passage and supply air flow flowing in supply air passage exchange heat via heat transfer plate, heat transfer plate and rib are fixed to each other by an adhesive member, rib is formed of a plurality of fiber members with heat meltability and hygroscopicity, and rib has a fiber melting layer that is formed by melting and fixing the plurality of fiber members on the surface of rib.

An integrated air conditioning system includes an outdoor unit, an indoor unit, and a ventilation device. The ventilation device includes a housing including an inlet flow path, and an outlet flow path, a total heat exchanger in which air flowing through the inlet flow path and air flowing through the outlet flow path exchange heat with each other, a first heat exchanger disposed on the inlet flow path to receive a refrigerant from the outdoor unit, a second heat exchanger disposed upstream of the first heat exchanger on the inlet flow path and connected to the first heat exchanger to be supplied with refrigerant discharged from the first heat exchanger, a first expansion device to expand the refrigerant supplied to the first heat exchanger from the outdoor unit, and a second expansion device to expand the refrigerant discharged from the first heat exchanger and supplied to the second heat exchanger.

An integrated air conditioning system includes a ventilation device comprising a first temperature sensor, a first humidity sensor, and a heat exchanger installed on the inlet flow path. An indoor unit configured to discharge heat-exchanged air into an indoor space. An outdoor unit configured to supply a refrigerant to the ventilation device and the indoor unit. A controller connected to the ventilation device, the indoor unit, and the outdoor unit. The controller configured to obtain an indoor temperature from the first temperature or the second temperature sensor. The controller configured to obtain indoor humidity from the first humidity sensor or the second humidity sensor and configured to control at least one of the ventilation device and the indoor unit based on the indoor temperature and the indoor humidity.

Method and device for reducing or eliminating a temperature drop of the supply air temperature during defrost operation, at an air handling unit (1) which is arranged with a heat pump (2) for recovering heat from an extract air stream (3) and transfer to a supply air stream (4). During defrosting of a first DX-coil (5), arranged in the extract air stream (3), by reversible operation of the heat pump (2), accumulated heat energy (E) is used for reduction or elimination of the temperature drop in the supply air temperature during the defrost operation, and which energy has been stored in an accumulator medium (7) which is at least partially in contact with the supply air flow (4). The stored energy (E) is delivered by heat exchange with the supply air stream (4) in a position after a second DX-coil (6) through a heating coil (8) arranged in the supply air stream (4).