An air conditioner includes a casing, and a blower and a refrigerant circuit disposed in the casing. The blower is configured to blow air. The refrigerant circuit has a compressor, a condenser, a decompressor, and an evaporator and is configured to circulate refrigerant in order of the compressor, the condenser, the decompressor, and the evaporator. The condenser has a first heat transfer tube through which the refrigerant flows and which has a first outside diameter. The evaporator has a second heat transfer tube through which the refrigerant flows and which has a second outside diameter. The evaporator is disposed windward of the condenser. The first outside diameter of the first heat transfer tube of the condenser is smaller than the second outside diameter of the second heat transfer tube of the evaporator.

An air conditioner includes a casing, and a blower and a refrigerant circuit disposed in the casing. The blower is configured to blow air. The refrigerant circuit has a compressor, a condenser, a decompressor, and an evaporator and is configured to circulate refrigerant in order of the compressor, the condenser, the decompressor, and the evaporator. The condenser has a first heat transfer tube through which the refrigerant flows and which has a first outside diameter. The evaporator has a second heat transfer tube through which the refrigerant flows and which has a second outside diameter. The evaporator is disposed windward of the condenser. The first outside diameter of the first heat transfer tube of the condenser is smaller than the second outside diameter of the second heat transfer tube of the evaporator.

A heat pump including a refrigerant circuit configured to circulate flammable refrigerant, and an indoor unit configured to be arranged in an indoor space. The refrigerant circuit has a compressor, a utilisation-side heat exchanger, an expansion device and a heat-source-side heat exchanger connected by piping. The an indoor unit includes an outer casing having a top, and a sealed container accommodated in the outer casing. The sealed container has a bottom and a top and accommodates at least one of the compressor, the utilisation-side heat exchanger, the expansion device, and the heat-source-side heat exchanger. The sealed container has a release opening to exhaust leaking refrigerant to an exterior of the outer casing of the indoor unit.

A single-package air conditioning appliance includes a housing defining an outdoor portion and an indoor portion. An outdoor heat exchanger assembly is disposed in the outdoor portion. The outdoor heat exchanger assembly includes an outdoor heat exchanger and an outdoor fan. An indoor heat exchanger assembly is disposed in the indoor portion. The indoor heat exchanger assembly includes an indoor heat exchanger and an indoor fan. A compressor is in fluid communication with the outdoor heat exchanger and the indoor heat exchanger to circulate a refrigerant between the outdoor heat exchanger and the indoor heat exchanger. The single-package air conditioner unit also includes a make-up air module. The make-up air module extends between the outdoor portion of the housing and an outside of the housing. The make-up air module includes a plurality of make-up air fans.

A single-package air conditioning appliance includes a housing defining an outdoor portion and an indoor portion. An outdoor heat exchanger assembly is disposed in the outdoor portion. The outdoor heat exchanger assembly includes an outdoor heat exchanger and an outdoor fan. An indoor heat exchanger assembly is disposed in the indoor portion. The indoor heat exchanger assembly includes an indoor heat exchanger and an indoor fan. A compressor is in fluid communication with the outdoor heat exchanger and the indoor heat exchanger to circulate a refrigerant between the outdoor heat exchanger and the indoor heat exchanger. The single-package air conditioner unit also includes a make-up air module. The make-up air module extends between the outdoor portion of the housing and an outside of the housing. The make-up air module includes a plurality of make-up air fans.

A single-package air conditioner unit may include a housing, an outdoor heat exchanger assembly, an indoor heat exchanger assembly, an indoor heat exchanger, a compressor, and an intake conduit. The housing may define an outdoor portion and an indoor portion. The compressor may be in fluid communication with an outdoor heat exchanger and an indoor heat exchanger to circulate a refrigerant between the outdoor heat exchanger and the indoor heat exchanger. The intake conduit may extend from the housing. The intake conduit may define an intake passage upstream from the indoor heat exchanger assembly. The intake conduit may further define a primary inlet and a secondary inlet spaced apart from the primary inlet in fluid parallel thereto. The primary inlet and the secondary inlet may be defined upstream from the intake passage to separately permit air thereto.

An air conditioner unit may include a housing, an outdoor heat exchanger assembly, an indoor heat exchanger assembly, a compressor, and a sterilization light assembly. The housing may define an indoor portion and an outdoor portion. The housing may define an exhaust outlet downstream from the indoor portion to exhaust air therefrom. The outdoor heat exchanger assembly may be disposed in the outdoor portion and comprising an outdoor heat exchanger. The indoor heat exchanger assembly may be disposed in the indoor portion and comprising an indoor heat exchanger and an indoor fan. The compressor may be in fluid communication with the outdoor heat exchanger and the indoor heat exchanger to circulate a refrigerant between the outdoor heat exchanger and the indoor heat exchanger. The sterilization light assembly may be disposed within the indoor portion and directed at the indoor heat exchanger to transmit an ultraviolet light emission thereto.

An air conditioner unit may include a housing, an outdoor heat exchanger assembly, an indoor heat exchanger assembly, a compressor, and a sterilization light assembly. The housing may define an indoor portion and an outdoor portion. The housing may define an exhaust outlet downstream from the indoor portion to exhaust air therefrom. The outdoor heat exchanger assembly may be disposed in the outdoor portion and comprising an outdoor heat exchanger. The indoor heat exchanger assembly may be disposed in the indoor portion and comprising an indoor heat exchanger and an indoor fan. The compressor may be in fluid communication with the outdoor heat exchanger and the indoor heat exchanger to circulate a refrigerant between the outdoor heat exchanger and the indoor heat exchanger. The sterilization light assembly may be disposed within the indoor portion and directed at the indoor heat exchanger to transmit an ultraviolet light emission thereto.

An air conditioning appliance or a make-up air (MUA) assembly may include an intake conduit and a secondary air duct. The intake conduit may be attachable to a housing of the air conditioning appliance. The intake conduit may define an intake passage upstream from the indoor inlet. The intake conduit may further define a secondary inlet upstream from the intake passage to permit air thereto. The secondary air duct may extend from the intake conduit outside of the housing upstream from the secondary inlet to direct air thereto.

An air conditioner unit may include a housing, an outdoor heat exchanger assembly, an indoor heat exchanger assembly, a compressor, and a sterilization light assembly. The housing may define an indoor portion and an outdoor portion. The housing may define an exhaust outlet downstream from the indoor portion to exhaust air therefrom. The outdoor heat exchanger assembly may be disposed in the outdoor portion and comprising an outdoor heat exchanger. The indoor heat exchanger assembly may be disposed in the indoor portion and comprising an indoor heat exchanger and an indoor fan. The compressor may be in fluid communication with the outdoor heat exchanger and the indoor heat exchanger to circulate a refrigerant between the outdoor heat exchanger and the indoor heat exchanger. The sterilization light assembly may be disposed within the indoor portion and directed forward at the indoor fan to transmit an ultraviolet light emission thereto.