Brazing-sheet type heat exchanger capable of using three kinds of medium to exchange heat

Abstract

The present invention refers to brazing sheet type heat exchanger to make three kinds media. It contains Each heat exchange plate having six angle of aperture peripheral tight surface structure and having zero to six angle of aperture, wherein having single layer sealing surface, all angle of aperture open calibre size and vertical distance being same, plate heat exchanger periphery four angle of aperture channel heat transfer medium inlet and outlet adopting opposite angle flow mode, such structure being benefit weak intensity material such as aluminium product to make sweat seal.

Description

technical field [0001] The invention relates to a plate heat exchanger, in particular to a brazed plate heat exchanger capable of exchanging heat with three media. Background technique [0002] This kind of brazed plate heat exchanger that can exchange heat between three media is assembled with several heat exchange plates that are roughly rectangular or square and other shapes with rounded corners. Heat exchange structure, the heat exchange structure on some heat exchange plates is composed of regular concave-convex support ribs, and the heat exchange structure on some heat exchange plates is composed of corrugations. In the accompanying drawings of the present invention , the heat exchange structure on the heat exchange plate is composed of corrugations. These heat exchange plates are externally brazed and sealed by means of peripheral slopes. Generally, there are three sets of six corner holes and a peripheral sealing structure for the corner holes on these heat exchange...

AI Technical Summary

Problems solved by technology

[0005] The disadvantage of the patent No. 98802699.6 is that the plate heat exchanger has different corner hole calibers in the same corner hole channel, and at the same time, the sealing forms around the corner holes in the same corner hole channel also have different caliber seals. When the heat exchange plates with different corner hole diameters and corner hole sealing areas in the same corner hole channel are brazed, the brazing clamping force cannot be continuously and uniformly applied to each heat transfer plate. Each corner hole and the sealing surface around the corner hole may cause desoldering or virtual welding in the sealing area around the corner hole during the brazing process, which will affect the quality of the product and the brazing yield

In addition, the disadvantage of this patent form is that the corner hole structure and the distribution of the sealing area around the corner hole are especially unfavorable for brazing and sealing of weaker materials like aluminum.

[0006] The disadvantage of the patent No. 99805005.9 is that the inlet and outlet of the heat exchange medium in the four corner hole channels adjacent to the four rounded corners around the plate heat exchanger adopt the flow mode of the same side flow. The heat transfer efficiency of the same side flow is low

In addition, the disadvantage of this patent form is that in the three groups of six corner holes on the same heat exchange plate, the vertical distances of the upper and lower sealing surfaces around the corner holes at different positions are different, and the upper and lower sealing surfaces around the corner holes in some The vertical distance of the upper and lower sealing surfaces around the corner hole is H, and the vertical distance of the upper and lower sealing surfaces around the corner hole is 2×H. Because the vertical distance of the upper and lower sealing surfaces around the corner hole is different, the ability and method of transmitting the brazing clamping force are also different. The hole structure and the distribution of the sealing area around the corner hole will affect the quality of the product and the brazing yield, especially unfavorable for brazing and sealing of weaker materials like aluminum

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