A subcooler is made up of a plate type heat exchanger. The accumulator is located between a compressor and the subcooler in a width direction of an outdoor unit in a planar view. The subcooler overlaps with the accumulator in the width direction in the planar view. As a result, a compact heat pump can be provided when the subcooler is a plate type heat exchanger.

A subcooler is made up of a plate type heat exchanger. The accumulator is located between a compressor and the subcooler in a width direction of an outdoor unit in a planar view. The subcooler overlaps with the accumulator in the width direction in the planar view. As a result, a compact heat pump can be provided when the subcooler is a plate type heat exchanger.

A condenser, an air conditioner outdoor unit, and an air-conditioning system. The condenser includes at least one row of heat exchange tubes and a plurality of fins arranged along the heat exchange tubes, where any fin is provided with at least one column of through holes, which correspond to the number of rows of the heat exchange tubes, for the heat exchange tubes to pass through; the fins are evenly divided, in the width direction, into at least one basic unit corresponding to the number of rows of the heat exchange tubes; the width of any basic unit is greater than 18.2 mm; and the center distance between two adjacent through holes from among any column of through holes is less than 21 mm. As a result, the heat exchange efficiency can be improved, and the energy efficiency can also be improved.

A condenser, an air conditioner outdoor unit, and an air-conditioning system. The condenser includes at least one row of heat exchange tubes and a plurality of fins arranged along the heat exchange tubes, where any fin is provided with at least one column of through holes, which correspond to the number of rows of the heat exchange tubes, for the heat exchange tubes to pass through; the fins are evenly divided, in the width direction, into at least one basic unit corresponding to the number of rows of the heat exchange tubes; the width of any basic unit is greater than 18.2 mm; and the center distance between two adjacent through holes from among any column of through holes is less than 21 mm. As a result, the heat exchange efficiency can be improved, and the energy efficiency can also be improved.

An air-conditioning apparatus includes: a housing having an intake air passage communicating with an air inlet and a blowout air passage communicating with an air outlet that allows air to be blown out in a single direction; a fan; a front heat exchanger facing the air outlet of the housing and including first and second heat exchangers; and at least one of rear and side heat exchangers that face rear and side surfaces of the housing, respectively. When the front heat exchanger operates as a condenser, the first heat exchanger operates as a condenser, and condensed and liquified refrigerant flows in the second heat exchanger. The second heat exchanger is located downstream of the first heat exchanger and the at least one of the rear and side heat exchangers in the flow direction of a refrigerant.

A heating, ventilation, and air conditioning (HVAC) system includes a housing and a heat exchanger disposed within the housing. The heat exchanger includes a plurality of tubes where the plurality of tubes extends from a first end to a second end of the heat exchanger. The heat exchanger also includes a plurality of fins coupled to and extending between the plurality of tubes. The heat exchanger further includes a first end sheet disposed at the first end of the heat exchanger and a second end sheet disposed at the second end of the heat exchanger. The heat exchanger also includes a plurality of intermediate sheets disposed between the first end sheet and the second end sheet, where the plurality of tubes extends through each intermediate sheet of the plurality of intermediate sheets, and each intermediate sheet of the plurality of intermediate sheets is coupled to the housing.

A heating, ventilation, and air conditioning (HVAC) system includes a housing and a heat exchanger disposed within the housing. The heat exchanger includes a plurality of tubes where the plurality of tubes extends from a first end to a second end of the heat exchanger. The heat exchanger also includes a plurality of fins coupled to and extending between the plurality of tubes. The heat exchanger further includes a first end sheet disposed at the first end of the heat exchanger and a second end sheet disposed at the second end of the heat exchanger. The heat exchanger also includes a plurality of intermediate sheets disposed between the first end sheet and the second end sheet, where the plurality of tubes extends through each intermediate sheet of the plurality of intermediate sheets, and each intermediate sheet of the plurality of intermediate sheets is coupled to the housing.

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 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 outdoor unit of an air-conditioning apparatus includes a heat exchange body including a plurality of flat tubes that extend in a vertical direction and that are arranged in a horizontal direction with gaps therebetween. A plurality of the heat exchange bodies are arranged in a direction of air flow to form a heat exchanger. A first header, into which hot gas refrigerant flows from a refrigerant circuit, is provided below one of the plurality of the heat exchange bodies that is at a most upwind position.