Evaporator heat transfer tube

Abstract

The invention discloses a heat transfer tube of an evaporator, which comprises a fin part arranged on the outer surface and an inner tooth part arranged on the inner surface. The secondary internal teeth, the fin part is provided with secondary fin grooves, tertiary fin grooves and a primary evaporation chamber, and the bottom of the primary evaporation chamber is extended upwards with four secondary fins, and the four secondary fins are in the The primary evaporation chamber is divided into at least two small cavities, and each of the primary evaporation chambers is provided with 1 to 4 quadruple fins. The fin grooves and evaporation chambers provided on the fin part of the heat transfer tube of the evaporator of the present invention increase the heat transfer area of ​​the heat transfer tube and the number of vaporization cores; the design of the inner teeth reduces the laminar flow effect of the refrigerant and enhances the The turbulent flow greatly enhances the boiling heat transfer performance.

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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