Slotted streamline rib type structure heat exchange plate

Abstract

The invention discloses a slotted streamline rib type structure heat exchange plate used for a printing circuit board heat exchanger. Inverted-V-shaped streamline grooves are formed in rib sheets so that a part of heat exchange fluid can flow into channels and flow out of the tails of the rib sheets, vertical collisions to the rib sheets from incoming flow are avoided, generation of a flowing stagnation area is prevented, the phenomenon that local resistance in the area is high is improved, and accordingly channel pressure drop losses are reduced. Meanwhile, in the slotting area, the heat exchange area can be obviously increased, and the heat exchange performance is improved as well.

Description

technical field [0001] The invention belongs to the field of heat exchangers, and in particular relates to a heat exchange plate with a grooved streamline rib structure for a printed circuit board heat exchanger. Background technique [0002] Printed circuit board heat exchange is a high-efficiency and compact heat exchanger resistant to high temperature and high pressure. After processing fine flow channels on the heat exchange substrate by chemical etching or machining, the heat exchange substrate is combined by diffusion welding. , to obtain the heat exchange core. In existing printed circuit board heat exchangers, the commonly used channel types are continuous straight channels, "zigzag" channels, etc. "Zigzag" channels can significantly enhance heat transfer performance but also cause flow resistance. The airfoil fin channel can greatly reduce the flow resistance under the condition of ensuring the heat exchange performance, so it has been widely used. However, for co...

AI Technical Summary

Problems solved by technology

However, for conventional airfoil fins, the incoming flow will hit the front end of the fin vertically, and a flow stagnation zone will be generated near the front end of the fin. In this area, there are large velocity gradients and pressure gradients, which will lead to large local resistance. Thus affecting the overall performance of the heat exchanger

The existing patent improves the influence of the flow stagnation area by making the front end of the fin into a sharp angle, but after changing it to a sharp angle, the disturbance at the front end of the fin becomes smaller, which will reduce the heat transfer performance

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