HEAT TRANSFERRING PIPE FOR AZEOTROPIC MIXED REFRIGERANT AND HEAT EXCHANGER FOR MIXED REFRIGERANT, FREEZER AND AIR CONDITIONER USING HEAT TRANSFER PIPE

摘要

PURPOSE: To provide a heat transfer pipe in which a specific substance of azeotropic mixed refrigerant flowing in gas-liquid phases is prevented from being stayed at an interface part and there is provided a pipe inner surface structure having a higher heat transfer performance similar to or than that of single refrigerant. ;CONSTITUTION: A heat transfer pipe constituting either a condensor or an evaporator of freezing cycle using azeotropic mixed refrigerant as working medium is comprised of a plurality of continuous fins 1 formed to be continuous not to be crossed to each other in an axial direction at an inner surface of the heat transfer pipe, non-continuous fins 2 adjacent to the continuous fins 1 formed not to be crossed with the continuous fins and further formed to be discontinuous or in saw-teeth manner along a longitudinal direction and some grooves each of which is formed between the discontinuous fins 2 and the continuous fins 1. Accordingly, the continuous grooves and protrusions enable an effect of suction of refrigerant liquid film to be reduced and also a liquid film to be thinned. In addition, the discontinuous grooves and protrusions discharge the liquid refrigerant, so that a staying of a specified substance at the gas-liquid interface part generated along the continuous protrusions can be prevented and disturbance of the flow of the refrigerant liquid film enables a distribution of concentration within the heat transfer pipe to be uniform.;COPYRIGHT: (C)1996,JPO