Heat-transfer pipe of evaporator

Abstract

The invention discloses a heat-transfer pipe of an evaporator, which comprises a fin part arranged on the external surface and an internal tooth part arranged on the internal surface. The internal tooth part comprises a primary internal tooth and a secondary internal tooth which are arranged crossways high and low in double-layer. The fin part is provided with a secondary fin groove, a third fin groove and a primary evaporation cavity, and the bottom of the evaporation cavity extends upwards and is provided with a quarternary fin, which is divided into two small hollow cavities in the primary evaporation cavity. Each primary evaporation cavity is internally provided with 1-4 quarternary fins. The fin groove and the evaporation cavity arranged on the fin part of the heat-transfer pipe of the evaporator increase the heat exchange area of the heat-transfer pipe and the number of vaporized core; and the internal tooth of the internal tooth part decreases the laminar flow effect of cooling mediums, strengths the turbulence and greatly reinforces the boiling heat transfer property.

Description

technical field [0001] The invention relates to the technical field of refrigeration, in particular to an evaporator heat transfer tube. Background technique [0002] Before 2003, my country's refrigeration and air-conditioning equipment generally adopted recommended technical standards, and there was no mandatory energy efficiency standard, resulting in a large gap between the energy efficiency ratio of my country's refrigeration and air-conditioning equipment compared with the world's advanced level. In order to change this backwardness, my country promulgated and implemented the "Energy Efficiency Limits and Energy Efficiency Levels of Household Refrigerators" in 2004, and implemented the "Energy Efficiency Limits and Energy Efficiency Levels of Room Air Conditioners" on March 1, 2005. , "Energy Efficiency Limits and Energy Efficiency Levels of Chillers", "Energy Efficiency Limits and Energy Efficiency Levels of Unitary Air Conditioners". Among them, the national energy e...

AI Technical Summary

Problems solved by technology

Although the various high-efficiency heat transfer tubes manufactured and used in the prior art have improved the performance of the two devices (evaporator and condenser) to a certain extent, they all have common problems: 1. Only focus on heat transfer tubes. The development of the surface heat transfer area ignores the maintenance of the vaporization core on the outer surface of the heat transfer tube when the refrigerant absorbs heat and evaporates, that is, the continuous generation of bubbles to maintain the high efficiency of evaporation

2. Insufficient attention to the inner surface of the heat transfer tube, resulting in excessive laminar flow on the inner wall of the heat transfer tube, insufficient turbulent flow, low heat transfer efficiency and poor refrigeration system efficiency

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