HEAT-TRANSFER TUBE FOR HEAT EXCHANGER OF HEAT PUMP TYPE AIR CONDITIONER

PROBLEM TO BE SOLVED: To provide an internally-grooved heat-transfer tube capable of improving heat transfer promoting effect in single phase flow in condensation, and reducing pressure loss in two-phase flow in evaporation, when the heat-transfer tube constituting a heat exchanger of a heat pump ty...

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Bibliographische Detailangaben
1. Verfasser:	SASAKI NAOE
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING COMBINED HEATING AND REFRIGERATION SYSTEMS DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION HEAT EXCHANGE IN GENERAL HEAT PUMP SYSTEMS HEATING LIGHTING LIQUEFACTION SOLIDIFICATION OF GASES MANUFACTURE OR STORAGE OF ICE MECHANICAL ENGINEERING REFRIGERATION MACHINES, PLANTS OR SYSTEMS REFRIGERATION OR COOLING WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide an internally-grooved heat-transfer tube capable of improving heat transfer promoting effect in single phase flow in condensation, and reducing pressure loss in two-phase flow in evaporation, when the heat-transfer tube constituting a heat exchanger of a heat pump type air conditioner is thinned. SOLUTION: This internally-grooved tube is provided with a plurality of grooves 12 on a tube inner face in parallel with each other at a prescribed angle to a tube shaft. The heat transfer tube 10 is constituted so that a tube outer diameter (d0) is 3 mm or more and 5 mm or less, a ratio (h/d0) of a fin height (h:mm) of fins 14 respectively formed between the grooves 12, 12, and the tube outer diameter (d0:mm) is within a range of 0.012-0.045, and a formula: 0.008≤(liquid accumulation area:mm2/wetted edge length:mm)/d0≤0.013 is satisfied. COPYRIGHT: (C)2010,JPO&INPIT