Self-separating finned tube type heat exchanger for air conditioner

Abstract

A self-distribution fin tube type heat exchanger for air conditioner is comprised by upper collection tube and lower collection tube, and connection tube and connecting tube which are parallel arranged between the upper and lower collection tubes, wherein the said connection tube and connecting tube use snake tube having fins, and quantity of the connection tubes are no less than two, two of which are arranged at two ends of the lower collection tube, and each connection tube is directly connected to the upper collection tube and the lower collection tube; and the upper end of the connecting tube is directly connected to the upper collection tube, and the lower end thereof is connected to the lower collection tube and extends into liquid of the lower collection tube. The invention adopts self-distribution structure, and can realize self-distribution of vapor / liquid phases of refrigerant so as to resolve the problem that the refrigerant of vapor / liquid phases flows nonuniformly in all channels when the heat exchanger serves as evaporator; the fins are inclined arranged along windward side in order to discharge condensed water or defrosted water in time. The invention has simple structure and has good distribution characteristic, and can be applied in heat pump air conditioner or other place needing air-cooled heat exchanger.

Description

technical field [0001] The invention relates to a self-liquid-separating fin-tube heat exchanger for air conditioners, which is used in household air conditioners or other occasions requiring air-cooled heat exchangers, and belongs to the technical field of air conditioners. Background technique [0002] In refrigeration and air conditioning systems, liquid separators are usually used for liquid separation. The liquid separator is an auxiliary device between the throttling device and the evaporator, and its function is to evenly distribute the refrigerant gas-liquid two-phase mixture from the throttling device to each channel of the evaporator. Therefore, the existing heat pump air conditioners are generally equipped with special liquid separators, but in actual operation, due to changes in working conditions or unreasonable selection of liquid separators, the flow in different pipes is uneven. Some tubes have less flow rate and evaporate to dryness prematurely, while some ...

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Problems solved by technology

[0003] In view of the deficiencies of the prior art, the purpose of the present invention is to provide a self-separating fin-tube heat exchanger for an air conditioner to solve the insufficient heat transfer area caused by the uneven flow rate of the refrigerant in each channel in the evaporator. Utilize the problem to improve the heat exchange effect; at the same time, adopt the fins arranged obliquely along the windward side, which is conducive to the timely discharge of condensed water or defrosting water, so that it has the characteristics of low cost, simple structure and good heat exchange effect

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