Micro-channel heat exchanger and heat pump system

Abstract

The invention provides a micro-channel heat exchanger and a heat pump system. The micro-channel heat exchanger comprises a first collecting pipe (1), a second collecting pipe (2), rotary connecting assemblies and a flat pipe (3), the first end of the flat pipe (3) communicates with the first collecting pipe (1), the second end of the flat pipe (3) communicates with the second collecting pipe (2),and the first end of the flat pipe (3) can be rotatably connected with the first collecting pipe (1) through the rotary connecting assembly; and the second end of the flat pipe (3) can be rotatably connected with the second collecting pipe (2) through the rotary connecting assembly. According to the micro-channel heat exchanger, a water bridge between the flat pipe and fins can be damaged, condensate water can be rapidly discharged, the circulation rate of air is increased, and the heat exchange efficiency is improved.

Description

technical field [0001] The application relates to the technical field of air conditioning, in particular to a microchannel heat exchanger and a heat pump system. Background technique [0002] With the continuous development of air-conditioning heat exchange technology, microchannel heat exchangers have become one of the main directions of heat exchanger development due to their advantages of compact structure, light weight, low cost, high heat exchange efficiency and strong pressure resistance. However, the development of microchannel heat exchangers is limited by the problem of uneven heat transfer between the windward and leeward sides of flat tube microchannels. On the other hand, when microchannel heat exchangers are used as evaporators in heat pump systems, the condensation generated on the surface The water is not easy to discharge, and the compact structure will cause condensed water to accumulate between the flat tubes and fins to form a water bridge, which not only ...

AI Technical Summary

Problems solved by technology

However, the development of microchannel heat exchangers is limited by the uneven heat transfer between the windward and leeward sides of the flat tube microchannels. On the other hand, when the microchannel heat exchanger is used as an evaporator in a heat pump system, the condensation generated on the surface The water is not easy to discharge, and the compact structure will cause condensed water to accumulate between the flat tubes and fins to form a water bridge, which not only hinders the circulation of air and reduces the heat exchange efficiency, but also easily forms frost and ice on the surface of the heat exchanger situation, further reducing the heat transfer efficiency

Even if the flat tubes are installed vertically or the fins are continuously optimized, it is difficult to completely solve the problem of frosting, which is the main reason why microchannel heat exchangers are generally not used in heat pump systems

Images