Parallel flow heat exchanger with double-row flat tubes and air-conditioning device with heat exchanger

Abstract

The invention relates to a parallel flow heat exchanger with double-row flat tubes. An upper collecting main is formed by buckling an upper collecting main cover plate onto an upper collecting main matrix; a lower collecting main is formed by buckling a lower collecting main cover plate onto a lower collecting main matrix; both ends of the double-row flat tubes are respectively inserted a flat tube cutting hole of the upper collecting main and a flat tube cutting hole of the lower collecting main, wherein one row of flat tubes are communicated with a buffer cavity and an overflow cavity, and the other row of flat tubes are communicated with a reflux cavity and a confluence cavity; a liquid inlet cavity is arranged on the lower collecting main matrix in the buffer cavity; the liquid inlet cavity is communicated to the buffer cavity through a plurality of spray holes in the wall body of the liquid inlet cavity; a liquid inlet pipe is externally connected at the port of the liquid inlet cavity; a liquid outlet pipe is arranged on a lower collecting main end plate on one end of the lower collecting main; the liquid outlet pipe is communicated to the confluence cavity. Refrigerant fully flows through the heat exchange flat tubes for twice, the flow resistance is small, a flow path is long, linear eddy does not easily occur along, the heat exchange of the parallel heat exchanger with double-row flat tubes is fuller, the heat exchange efficiency is high, the energy efficiency ratio of the air-conditioning device of the heat exchanger can be improved, the overall structure is simple, the manufacturing is easy, and the installation is convenient.

Description

technical field [0001] The invention belongs to the technical field of air-conditioning devices, and in particular relates to a parallel-flow heat exchanger with double-row flat tubes and an air-conditioning device with the heat exchanger. Background technique [0002] Air-conditioning energy efficiency standards are increasing year by year, which will inevitably consume a large amount of copper resources, resulting in a rapid rise in copper prices. China is rich in aluminum resources, but copper resources are scarce, and copper resources are facing the risk of shortage. Therefore, the aluminum-for-copper technology will become the development of air-conditioning heat exchangers in the future. The inevitable trend. Parallel flow porous microchannel heat exchanger is a kind of all-aluminum heat exchanger. As a new type of heat exchanger for air conditioners, it is more and more widely used. [0003] In existing parallel-flow multi-hole microchannel heat exchangers, usually o...

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Problems solved by technology

After the refrigerant enters the collecting pipe, it will be disturbed by the flat tube inside the collecting pipe, vortex is easy to appear along the way, the flow resistance is very large, and the uneven flow of refrigerant makes the refrigerant flow rate of the far-end flat pipe far away. The flow rate of the refrigerant is smaller than that of the near-end flat tubes, some flat tubes have sufficient heat exchange, and some flat tubes have insufficient heat exchange, which will inevitably cause uneven temperature distribution of the parallel flow heat exchanger, so that the parallel flow heat exchanger's heat exchange Reduced thermal efficiency

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