Abstract: An air conditioner includes a detection unit configured to detect a load in a room, a notification unit configured to notify a user of information, and a control unit, in which the control unit causes the notification unit to notify the user that ventilation is necessary when a load condition indicating that a variation of the load detected by the detection unit is within a predetermined range in a first time period is satisfied.

Abstract: An air conditioner includes a detection unit configured to detect a load in a room, a notification unit configured to notify a user of information, and a control unit, in which the control unit causes the notification unit to notify the user that ventilation is necessary when a load condition indicating that a variation of the load detected by the detection unit is within a predetermined range in a first time period is satisfied.

Abstract: A blower includes a propeller fan, and an enclosure. The propeller fan is configured to rotate around a rotation axis. The propeller fan includes a plurality of blades at unequal pitches. The enclosure houses the propeller fan. The enclosure includes a bell mouth. The enclosure has a depth L. The bell mouth includes a cylindrical part parallel to the rotation axis. 0.14 ? H ? ? 2 H ? ? 0 ? 0.22 ? # A length of the blades is H0 in a rotation axis direction, and a length of the cylindrical part is H2 in the rotation axis direction.

Abstract: An outdoor unit a refrigeration apparatus includes an aluminum or aluminum alloy heat exchanger, an aluminum or aluminum alloy bracket having a securing portion attached directly to the heat exchanger and a fixing portion with a through hole used to fix the bracket to a non-aluminum metal structural part, a non-metal component interposed between the fixing portion of the bracket and the structural part to create a non-contact state, a non-aluminum metal anchoring part, and an anchored structure cooperating with the anchoring part to fasten a fixing portion of the bracket to the structural part via the non-metal component. The anchoring part has an outer shape smaller than the through hole in the fixing portion. The non-metal component maintains, in astute in which the anchoring part is passing through the through hole in the fixing portion, a non-contact state between the bracket and the anchoring part.

Abstract: An outdoor unit of a refrigeration apparatus includes a heat exchanger constructed of aluminum or aluminum alloy, a floor frame supporting the heat exchanger, and a spacer disposed between the heat exchanger and the floor frame. The heat exchanger has a plurality of flat pipes, a header manifold connected to the flat pipes, and a plurality of fins joined to the flat pipes. Heat exchange occurs between a fluid flowing inside the flat pipes and air flowing outside the flat pipes. The spacer has an inclined surface and a horizontal surface. The inclined surface guides condensation from the heat exchanger to the floor frame. The horizontal surface contacts the heat exchanger and the heat exchanger is horizontally mounted on the horizontal surface.