Heat exchanger

Abstract

A heat exchanger having a heat exchanger core having at least two rows of tube and fin blocks, each tube and fin block contains an assembly of tubes and fins, wherein the tubes are aligned parallel to each other while the fins are located between adjacent tubes, each tube having a first tube end and a second tube end, each tube and fin block of the first tube and fin block and the second tube and fin block having a manifold tube, the manifold tubes having a row of openings for a fluid tight connection with tubes of a tube and fin block, wherein the first tube ends of the first tube and fin block are fluid tight connected to the openings of a first manifold and the first tube ends of the second tube and fin block are fluid tight connected to the openings of a second manifold.

Description

BACKGROUND OF THE INVENTIONField of the Invention[0001]The present invention relates to a heat exchanger, especially for a refrigeration cycle of a motor vehicle or for residential and / or commercial application.Description of the Background Art[0002]Two row heat exchangers are known in the prior art. Such two row heat exchangers are known as evaporators having two heat exchanger cores which are located in two rows and which are aligned in air flow direction one behind the other such that the air flow crosses first one of the two heat exchanger cores and then the other of the two heat exchanger cores.[0003]It is known that the two heat exchanger cores are produced with two manifolds with a row of tubes and fins between the two manifolds such that each tube is inserted with one of his tube ends in an opening of one of the two manifolds and with the other tube end in an opening of the other manifold. Such heat exchanger cores are fluidically connected by connection tubes. Such a heat e...

AI Technical Summary

Benefits of technology

The invention is a heat exchanger with two rows of tubes and fins that are easy to assemble and manufacture while reducing the risk of leakages. The heat exchanger has a manifold tube with openings for fluid tight connection with the tubes of a tube and fin block. The tubes of each block are connected pairwise by a connecting element, which provides a cavity for mixing fluid from different channels. This design reduces the leakage rate of the heat exchanger. The connecting element can be made using two stacked plates, which can be cost-efficiently produced.

Problems solved by technology

Such a heat exchanger design requires four manifolds and the manufacturing process is costly.

Such tubes and the fins between the tubes are difficult to assemble.

Therefore, the assembly is costly.

These heat exchangers are easy to assemble and to braze but the bending process is difficult and might lead to leakage of tubes.

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