An external-air conditioning apparatus and a ventilation system are provided, the external-air conditioning apparatus includes a fin tube type heat exchanger and a housing that stores this heat exchanger. The housing includes a base body that serves as a back side of the apparatus body and a cover body that serves as a front side of the apparatus body, and the base body and the cover body are dividable and detachable in structure. The base body has a base portion, a partitioning portion, a connecting pipe portion, a heat-exchanger-holding structure portion, and a water receiving portion. The cover body is a structure in which a front wall portion and a three-side peripheral wall portion are formed integrally with each other, and a part in which the peripheral wall portion is not formed is an inlet for external air.

An air conditioner is provided. The air conditioner includes a heat exchange module, at least one humidity sensor, and a controller. The heat exchange module includes a compressor, a first heat exchanger, an expansion valve, a second heat exchanger, and an absorbent disposed on an outer surface of the first and second heat exchangers. The controller is configured to control to stop a normal operation and perform a drying operation for supplying air to any one of the first and second heat exchangers serving as an evaporator when it is determined that a predetermined drying operation condition is satisfied based on humidity information of air passed through the any one of the first and second heat exchangers serving as the evaporator, during the normal operation in which the any one of the first and second heat exchangers serves as an evaporator and the other serves as a condenser.

An air conditioner is provided. The air conditioner includes a heat exchange module, at least one humidity sensor, and a controller. The heat exchange module includes a compressor, a first heat exchanger, an expansion valve, a second heat exchanger, and an absorbent disposed on an outer surface of the first and second heat exchangers. The controller is configured to control to stop a normal operation and perform a drying operation for supplying air to any one of the first and second heat exchangers serving as an evaporator when it is determined that a predetermined drying operation condition is satisfied based on humidity information of air passed through the any one of the first and second heat exchangers serving as the evaporator, during the normal operation in which the any one of the first and second heat exchangers serves as an evaporator and the other serves as a condenser.

Disclosed is a window air conditioner having a constant temperature dehumidification mode. A first indoor heat exchanger and a second indoor heat exchanger of the air conditioner are stacked in an air inlet direction of an indoor air duct of the air conditioner. In the constant temperature dehumidification mode, one of the indoor heat exchangers is configured to be in a heating mode, and the other one is configured to be in a cooling mode. In this way, both fresh air and indoor air may be dehumidified and heated, a user may feel the fresh air and the temperature of the dehumidified air is comfortable.

Disclosed is a window air conditioner having a constant temperature dehumidification mode. A first indoor heat exchanger and a second indoor heat exchanger of the air conditioner are stacked in an air inlet direction of an indoor air duct of the air conditioner. In the constant temperature dehumidification mode, one of the indoor heat exchangers is configured to be in a heating mode, and the other one is configured to be in a cooling mode. In this way, both fresh air and indoor air may be dehumidified and heated, a user may feel the fresh air and the temperature of the dehumidified air is comfortable.

The present disclosure relates to a heating, ventilation, and/or air conditioning (HVAC) system having a heat exchanger configured to thermally regulate a supply air flow, where the heat exchanger includes a thermoelectric device, a first plurality of fins coupled to the thermoelectric device, and a second plurality of fins coupled to the thermoelectric device. The first plurality of fins extend into a supply air flow path of the supply air flow to transfer thermal energy between the thermoelectric device and the supply air flow and the second plurality of fins convectively transfer thermal energy between the thermoelectric device and a working fluid exterior the supply air flow path.

The present disclosure relates to a heating, ventilation, and/or air conditioning (HVAC) system having a heat exchanger configured to thermally regulate a supply air flow, where the heat exchanger includes a thermoelectric device, a first plurality of fins coupled to the thermoelectric device, and a second plurality of fins coupled to the thermoelectric device. The first plurality of fins extend into a supply air flow path of the supply air flow to transfer thermal energy between the thermoelectric device and the supply air flow and the second plurality of fins convectively transfer thermal energy between the thermoelectric device and a working fluid exterior the supply air flow path.

A heating, ventilation, and air conditioning (HVAC) system includes one or more compressors, one or more outdoor heat exchangers, and one or more indoor heat exchangers. The HVAC system also includes a base pan on which the one or more compressors are mounted. The base pan includes a base level and one or more tier levels higher than the base level. The distance from any point on a perimeter of the first-tier level to a nearest point on a perimeter of the base level is based on the smallest bolt circle diameter of the one or more compressors mounted on the base pan. Also, the perimeter lengths of the tier levels are based on a percentage of the base level perimeter length.

A heating, ventilation, and air conditioning (HVAC) system includes one or more compressors, one or more outdoor heat exchangers, and one or more indoor heat exchangers. The HVAC system also includes a base pan on which the one or more compressors are mounted. The base pan includes a base level and one or more tier levels higher than the base level. The distance from any point on a perimeter of the first-tier level to a nearest point on a perimeter of the base level is based on the smallest bolt circle diameter of the one or more compressors mounted on the base pan. Also, the perimeter lengths of the tier levels are based on a percentage of the base level perimeter length.

A heat exchanger has a structure in which a heat exchanger main body through which coolant flows is obliquely installed in a box-shaped enclosure, the heat exchanger main body is constituted by a header pipe and a plurality of heat transfer pipes connected to the header pipe and disposed at predetermined intervals along a surface of a part of the header pipe, the header pipe has an area adjacent to an inner surface of the enclosure, and a seal section is provided between the inner surface of the enclosure and the area of the header pipe adjacent to the enclosure.