Heat exchange plate structure in brazed plate heat exchanger

Abstract

A heat exchange plate structure in a brazed plate heat exchanger is composed of a metal sheet, wherein the periphery of the metal sheet is upwards provided with a flanging, a plurality of bottom shallow grooves are distributed in the upper side face of the metal sheet at equal intervals along the periphery of the upper side face of the metal sheet, a plurality of side wall shallow grooves are distributed in the inner side face of the flanging at equal intervals along the periphery of the metal sheet, and a distance exists between the upper end of any side wall shallow groove and the edge line of the upper side of the flanging. The side wall shallow grooves and the bottom shallow grooves are distributed along the welding portions of two metal sheets in the brazed plate heat exchanger, and can increase the area of a copper layer of the welding portion and increase the partial thickness, and therefore the thickness of covering copper on the inner side of the metal sheet is reduced, and at the same time, the welding intensity can still be ensured. A through hole is formed in the top of a spherical surface protrusive part in the metal sheet and filled with welding flux, when welding is carried out, the welding flux at the top end of the through hole is firstly welded to the other metal sheet, and the locating effect is achieved. The heat exchange plate structure in the brazed plate heat exchanger can reduce consumption of copper raw materials and improve welding efficiency.

Description

Technical field: [0001] The invention relates to the field of machinery, in particular to heat exchange machinery, in particular to a brazed plate heat exchanger, and in particular to a heat exchange plate structure in a brazed plate heat exchanger. Background technique: [0002] Brazed plate heat exchangers are widely used in vehicles and machinery. The main body of the brazed plate heat exchanger is composed of multiple plate heat exchange elements, any one of which is composed of two metal sheets with matching shapes, and a thin rectangular channel is formed between the two metal sheets. Heat exchange occurs when the medium flows through. In the prior art, two metal sheets are connected by copper brazing. Before welding, a layer of metallic copper needs to be covered on the inner side of one of the metal sheets. In order to ensure the welding strength between the two metal sheets, the copper covering layer needs to have a certain thickness, so the plate heat exchange el...

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a heat exchange plate structure in a brazed plate heat exchanger. The heat exchange plate structure in the brazed plate heat exchanger needs to solve the problem of plate heat exchange elements in the prior art. The technical problem of consuming a large amount of copper raw materials to ensure the welding strength

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