Collecting pipe and heat exchanger with same

Abstract

A heat exchanger comprises a heat exchange flat pipe and a collecting pipe. The heat exchanger can achieve the effect of uniformly distributing refrigerant while being used as an evaporator or a condenser so as to improve the heat exchange performance of the evaporator or the condenser. The collecting pipe comprises an upper collecting pipe wall, a lower collecting pipe and a splitter pore plate for uniformly shunting. A splitter pore is arranged on the splitter pore plate. The splitter pore plate is inserted between the upper collecting pipe wall and the lower collecting pipe and encircles to form an upper cavity and a lower cavity together with the upper collecting pipe wall and the lower collecting pipe. The refrigerant gas firstly enters into the lower cavity, enters into the upper cavity via the splitter pore and finally enters into a heat exchange flat pipe. The refrigerant gas flow entering into the heat exchange flat pipe is uniformly distributed due to shunting action of the splitter pore plate so that the uniform and full heat exchange effect is achieved and the overall heat exchange performance of the heat exchanger is improved.

Description

technical field [0001] The invention relates to the field of air-conditioning heat exchangers, in particular to a header and a heat exchanger with the header. Background technique [0002] When the microchannel heat exchanger is used as an evaporator, the imported refrigerant is generally a gas-liquid two-phase. Such as figure 1 As shown, the headers for existing microchannel heat exchangers are usually directly connected to the heat exchange flat tubes without any diversion measures. After entering the headers, the gas-liquid two-phase stratification phenomenon is obvious, resulting in the refrigerant entering each heat exchange flat tube The distribution is uneven, and the heat transfer performance of the heat exchanger is poor. Moreover, since the heat pump has two operating modes of cooling and heating, the heat exchanger of the outdoor unit involves the mutual conversion of the condenser and the evaporator. For a single-flow heat exchanger, when used as a condenser, ...

AI Technical Summary

Problems solved by technology

First of all, in order to achieve uniform flow distribution, it is necessary to open through holes of unequal distance or area on the shunt pipe. It is technically difficult to open such non-equidistant and equal-area through holes and large holes in the shunt pipe; in addition, If the diameter of the header pipe of the original heat exchanger remains unchanged, the diameter of the shunt pipe is limited. In order to ensure the strength of the shunt pipe, the area of ​​a single shunt hole and the area of ​​the total shunt hole should not be too large, so the refrigerant in the shunt pipe The flow resistance of the flow resistance increases correspondingly; if the area of ​​the distribution hole on the distribution pipe is increased, the diameter of the distribution pipe needs to be increased, and the diameter of the collecting pipe also needs to be increased accordingly, so that the flow rate of the refrigerant in the pipe will decrease, and increase Material costs

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