Abstract: An air-conditioning unit includes an air conditioner to control air temperature, a first channel to guide air supplied from the air conditioner to a conditioning target, a heat exchange channel through which the air supplied from the air conditioner exchanges heat with the conditioning target, a second channel to guide air from the conditioning target either outside the air-conditioning unit or to the air conditioner, and a channel switching unit to cause the air conditioner to suck in either external air or the air guided from the conditioning target.

Abstract: A cooling device for use in an image forming apparatus, disposed downstream within the apparatus in a direction of conveyance of a sheet from a fixing device that fixes an image onto the sheet at a temperature corresponding to a sheet type, includes a conveyance part to convey the sheet, a cooling member to absorb heat by thermal conduction from the sheet being conveyed by the conveyance part, a temperature controller to control a temperature of the cooling member, a temperature detector to detect the temperature of the cooling member, and a control unit connected to the temperature controller and the temperature detector to control the cooling member, using the temperature controller, to a target temperature corresponding to the sheet type based on the temperature of the cooling member detected by the temperature detector.

Abstract: An image forming apparatus includes an air-conditioning section to control at least one of temperature and humidity of air, a first passage to guide the air sent off by the air-conditioning section to a temperature-controlled portion in the image forming apparatus, an air-intake section to take in the air from outside of the image forming apparatus, and a second passage to guide the air taken in by the air-intake section to the temperature-controlled portion.