HEAT EXCHANGER AND AIR-CONDITIONING DEVICE

Provided is a heat exchanger and an air conditioner each of which has a surface structure that can reduce adherence of frost by scattering condensed water even when used in a frosting environment. A heat exchanger includes a portion on whose surface a water-repellent coating is formed. The surface o...

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Bibliographische Detailangaben
Hauptverfasser:	YOSHIDA, Kaori, NAGANO, Tomohiro, FUJINO, Hirokazu, FUJINAMI, Isao, YAMAGUCHI, Hiroki, MONDAL, Deb Kumar
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AIR-CONDITIONING, AIR-HUMIDIFICATION, VENTILATION, USE OF AIRCURRENTS FOR SCREENING BLASTING COMBINED HEATING AND REFRIGERATION SYSTEMS DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION HEAT EXCHANGE IN GENERAL HEAT PUMP SYSTEMS HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS,IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT HEATING LIGHTING LIQUEFACTION SOLIDIFICATION OF GASES MANUFACTURE OR STORAGE OF ICE MECHANICAL ENGINEERING RANGES REFRIGERATION MACHINES, PLANTS OR SYSTEMS REFRIGERATION OR COOLING VENTILATING WEAPONS
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Beschreibung
Zusammenfassung:	Provided is a heat exchanger and an air conditioner each of which has a surface structure that can reduce adherence of frost by scattering condensed water even when used in a frosting environment. A heat exchanger includes a portion on whose surface a water-repellent coating is formed. The surface on which the water-repellent coating is formed has a surface structure that satisfies all of the following relationships: rw(entirety) > 0.6/\|cosθw\|, rw(protrusion) > 0.6/\|cosθw\|, 0.1 < d/L < 0.8, L < 3.0 µm, and 90° < θw < 120°, where L is an average pitch of protrusions, d is an average diameter of the protrusions, rw(entirety) is an average area-enlargement ratio of an entire surface, rw(protrusion) is an average area-enlargement ratio of surface protrusions, and θw is a contact angle of water on a flat surface of the water-repellent coating.