Heat exchanger and air conditioning unit

Abstract

The invention discloses a heat exchanger and an air conditioning unit, wherein the heat exchanger comprises a first heat exchange unit and a second heat exchange unit which are arranged side by side along the flowing direction of the air, and a cavity is arranged between the first heat exchange unit and the second heat exchange unit. According to the heat exchanger and the air conditioning unit, the heat exchange efficiency is effectively improved, the defrosting time is shortened, and the comfort of users during using is improved.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a tube-fin heat exchanger and an air conditioning unit using the same. Background technique [0002] The heat exchanger is an important part of the air conditioning unit. The tube-fin heat exchanger is a common form of heat exchanger. Due to the different performance and structure of the unit, the tube-fin heat exchangers used are also varied. , there are a row of tubes and multiple rows of tubes and other forms. [0003] For a tube-fin heat exchanger with multiple rows of tubes, as the number of heat exchange tubes increases, the heat exchange efficiency of the heat exchange tubes gradually decreases from the windward side to the leeward side, so that the efficiency of the entire heat exchanger cannot be fully utilized. . At the same time, when the air conditioner unit is in heating operation, the tube-fin heat exchanger located outdoors will experience frost. As the ...

AI Technical Summary

Problems solved by technology

[0003] For a tube-fin heat exchanger with multiple rows of tubes, as the number of heat exchange tubes increases, the heat exchange efficiency of the heat exchange tubes gradually decreases from the windward side to the leeward side, so that the efficiency of the entire heat exchanger cannot be fully utilized.

At the same time, when the air conditioner unit is in heating operation, the tube-fin heat exchanger located outdoors will experience frost. As the operating time increases, the frost layer will gradually spread from the heat exchange tube on the windward side to the heat exchange tube on the leeward side. The heat pipe makes the whole heat exchanger covered with frost layer and thickens continuously, thus affecting the performance of the whole machine

In order to maintain the performance of the unit, the system needs to defrost the entire outdoor heat exchanger, which not only consumes a lot of energy, but also takes a long time to defrost, which seriously affects the comfort of users

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