An outdoor unit of a refrigeration cycle apparatus to be installed in an external-wall internal space of a structure includes a casing, a heat exchanger accommodated in the casing, a first air-sending device configured to cause air to pass through the heat exchanger and discharge the air to the external-wall internal space, a second air-sending device configured to suck the air discharged to the external-wall internal space by the first air-sending device and discharge the air to an outside of the structure, and a divider that divides an inside of the casing into a first air passage and a second air passage. The heat exchanger and the first air-sending device are disposed in the first air passage. The second air-sending device is disposed in the second air passage.

An outdoor unit of a refrigeration cycle apparatus to be installed in an external-wall internal space of a structure includes a casing, a heat exchanger accommodated in the casing, a first air-sending device configured to cause air to pass through the heat exchanger and discharge the air to the external-wall internal space, a second air-sending device configured to suck the air discharged to the external-wall internal space by the first air-sending device and discharge the air to an outside of the structure, and a divider that divides an inside of the casing into a first air passage and a second air passage. The heat exchanger and the first air-sending device are disposed in the first air passage. The second air-sending device is disposed in the second air passage.

An air conditioner may have a structure in which a snowfall detection device is attached to a grill and a case, and an amount of snow accumulated on the grill is detected in a non-contact manner to control an operation of the air conditioner. The snowfall may be more stably and reliably detected, and also the air conditioner may more stably and reliably operated.

An air conditioner may have a structure in which a snowfall detection device is attached to a grill and a case, and an amount of snow accumulated on the grill is detected in a non-contact manner to control an operation of the air conditioner. The snowfall may be more stably and reliably detected, and also the air conditioner may more stably and reliably operated.

An assembly for mounting in a wall includes a first tube having a flange at a first end of the first tube, the flange to be secured against an inner wall panel, a first hose-guide adjacent the first end of the first tube; a second tube having a faceplate flange attached to a second end of the second tube, the faceplate flange to be secured against an outer wall panel, a second hose-guide adjacent the second end of the second tube; and a hood attachable to an outer side of the faceplate flange. A first distance between the first hose-guide and an inner periphery of the first tube is greater than a second distance between the second hose-guide and an inner periphery of the second tube so that a hose guided by the hose-guides slopes downwardly as it exits the building through the wall.

An assembly for mounting in a wall includes a first tube having a flange at a first end of the first tube, the flange to be secured against an inner wall panel, a first hose-guide adjacent the first end of the first tube; a second tube having a faceplate flange attached to a second end of the second tube, the faceplate flange to be secured against an outer wall panel, a second hose-guide adjacent the second end of the second tube; and a hood attachable to an outer side of the faceplate flange. A first distance between the first hose-guide and an inner periphery of the first tube is greater than a second distance between the second hose-guide and an inner periphery of the second tube so that a hose guided by the hose-guides slopes downwardly as it exits the building through the wall.

An air conditioner according to an embodiment of the present invention includes: a refrigerant circuit including a compressor, an outdoor heat exchanger, an indoor heat exchanger, and a pressure reducer that is disposed between the outdoor heat exchanger and the indoor heat exchanger; an outdoor fan that blows the air to the outdoor heat exchanger; an indoor fan that blows the air to the indoor heat exchanger; and a control device that sets an upper limit value of a rotational frequency of the outdoor fan in accordance with a rotational frequency of the indoor fan.

An air conditioner according to an embodiment of the present invention includes: a refrigerant circuit including a compressor, an outdoor heat exchanger, an indoor heat exchanger, a pressure reducer that is disposed between the outdoor heat exchanger and the indoor heat exchanger, and a flow channel switching unit that switches a flow direction of a refrigerant discharged from the compressor; an outdoor fan that blows the air to the outdoor heat exchanger; and a control device that sets an instructed rotational frequency which is a rotational frequency for driving the outdoor fan. The control device performs processing of stopping the outdoor fan while gradually reducing the instructed rotational frequency in a case where it is determined that a predetermined defrosting start condition is satisfied during a heating operation.

According to various embodiments, an air-handling apparatus includes: a housing having a plurality of vertical walls; an air inlet that is disposed in one of the plurality of vertical walls and is configured to receive first air into the air-handling apparatus while the first air moves in a first direction; an air outlet that is disposed in one of the plurality of vertical walls and is configured to discharge second air from the air-handling apparatus while the second air moves in a second direction, wherein the first direction differs from the second direction by at least 90 degrees; a centrifugal fan that is disposed within the housing and receives the first air and discharges the second air; and an air temperature-conditioning component that is disposed within the housing and in the path of one of the first air or the second air.

According to various embodiments, an air-handling apparatus includes: a housing having a plurality of vertical walls; an air inlet that is disposed in one of the plurality of vertical walls and is configured to receive first air into the air-handling apparatus while the first air moves in a first direction; an air outlet that is disposed in one of the plurality of vertical walls and is configured to discharge second air from the air-handling apparatus while the second air moves in a second direction, wherein the first direction differs from the second direction by at least 90 degrees; a centrifugal fan that is disposed within the housing and receives the first air and discharges the second air; and an air temperature-conditioning component that is disposed within the housing and in the path of one of the first air or the second air.