An air conditioner unit includes a housing defining an outdoor portion and an indoor portion. A makeup air intake duct and a makeup air exhaust duct are disposed above the housing. The air conditioner unit also includes an air to air heat exchanger. The air to air heat exchanger includes a first inlet side attached to the makeup air intake duct, a second inlet side, a first outlet side, and a second outlet side attached to the makeup air exhaust duct. The air to air heat exchanger also includes one or more alternating top layers and bottom layers. The one or more top layers are in fluid communication with the first inlet side and the first outlet side, and the one or more bottom layers are in fluid communication with the second inlet side and the second outlet side.

An air conditioner unit includes a housing defining an outdoor portion and an indoor portion. A makeup air intake duct and a makeup air exhaust duct are disposed above the housing. The air conditioner unit also includes an air to air heat exchanger. The air to air heat exchanger includes a first inlet side attached to the makeup air intake duct, a second inlet side, a first outlet side, and a second outlet side attached to the makeup air exhaust duct. The air to air heat exchanger also includes one or more alternating top layers and bottom layers. The one or more top layers are in fluid communication with the first inlet side and the first outlet side, and the one or more bottom layers are in fluid communication with the second inlet side and the second outlet side.

An air conditioner unit includes a housing defining an outdoor portion and an indoor portion. A makeup air intake duct and a makeup air exhaust duct are disposed above the housing. The air conditioner unit also includes an air to air heat exchanger. The air to air heat exchanger includes a first inlet side attached to the makeup air intake duct, a second inlet side, a first outlet side, and a second outlet side attached to the makeup air exhaust duct. The air to air heat exchanger also includes one or more alternating top layers and bottom layers. The one or more top layers are in fluid communication with the first inlet side and the first outlet side, and the one or more bottom layers are in fluid communication with the second inlet side and the second outlet side.

An air conditioner unit includes a housing defining an outdoor portion and an indoor portion. A makeup air intake duct and a makeup air exhaust duct are disposed above the housing. The air conditioner unit also includes an air to air heat exchanger. The air to air heat exchanger includes a first inlet side attached to the makeup air intake duct, a second inlet side, a first outlet side, and a second outlet side attached to the makeup air exhaust duct. The air to air heat exchanger also includes one or more alternating top layers and bottom layers. The one or more top layers are in fluid communication with the first inlet side and the first outlet side, and the one or more bottom layers are in fluid communication with the second inlet side and the second outlet side.

A dehumidifier includes a machine body including a case. The case includes an air inlet, an air outlet, and an air duct communicating the air inlet and the air outlet. The dehumidifier further includes an axial flow fan arranged in the air duct. An air outlet direction of the axial flow fan is configured to face the air outlet. The dehumidifier also includes a compressor arranged inside the case and side by side with the axial flow fan.

An air conditioning and heat pump tower includes a main casing, a plurality of connecting pipes, a compressor, a front heat exchanger, a rear heat exchanger, a fan unit, and an energy efficient arrangement. The energy efficient arrangement includes a first pre-heating heat exchanger supported in a front compartment of the main casing, and positioned between an outdoor air intake opening and an outdoor heat exchanging portion of the front heat exchanger. The air conditioning and heat pump tower may be operated between an air conditioning mode for absorbing heat from the indoor space, and a heat pump mode for producing heat to the indoor space. A predetermined amount of ambient air may be drawn through the outdoor air intake opening and may be pre-heated by the energy efficient arrangement before delivering to the indoor space.

A heat exchange device and a refrigerant circulation system are disclosed. The heat exchange device includes a housing, defining a first air inlet and a first air outlet; wherein the first air inlet and the first air outlet are spaced apart along a first direction; and a first heat exchange component, arranged in the housing and comprising a plurality of heat exchange fins spaced apart along a second direction; wherein the first heat exchange component is arranged opposite to the first air inlet along a third direction; the second direction is perpendicular to the first direction, and the third direction is perpendicular to the first direction and the second direction.

A heat exchange device and a refrigerant circulation system are disclosed. The heat exchange device includes a housing, defining a first air inlet and a first air outlet; wherein the first air inlet and the first air outlet are spaced apart along a first direction; and a first heat exchange component, arranged in the housing and comprising a plurality of heat exchange fins spaced apart along a second direction; wherein the first heat exchange component is arranged opposite to the first air inlet along a third direction; the second direction is perpendicular to the first direction, and the third direction is perpendicular to the first direction and the second direction.

A first passage forming member and a second passage forming member each include: a rib portion including a first wall portion constituting an end in a first direction of the first passage, a second wall portion constituting an end in the first direction of the second passage, and a third wall portion separating the first passage and the second passage adjacent to each other in a second direction from each other; a board being in contact with an end in a third direction of the rib portion, and separating a first connection passage and a second connection passage from each other; a first blocking portion installed at the end of the rib portion, to block between the first passage and the second connection passage; and a second blocking portion installed at the end of the rib portion, to block between the second passage and the first connection passage.

A first passage forming member and a second passage forming member each include: a rib portion including a first wall portion constituting an end in a first direction of the first passage, a second wall portion constituting an end in the first direction of the second passage, and a third wall portion separating the first passage and the second passage adjacent to each other in a second direction from each other; a board being in contact with an end in a third direction of the rib portion, and separating a first connection passage and a second connection passage from each other; a first blocking portion installed at the end of the rib portion, to block between the first passage and the second connection passage; and a second blocking portion installed at the end of the rib portion, to block between the second passage and the first connection passage.