Multi-flow plate heat exchanger with bypass flow channel

A second medium inlet and a second medium outlet of the multi-flow plate heat exchanger are arranged on the same side and flow in a multi-flow mode, a cooling core body is composed of a top plate, a top piece, a chip, a partition plate and a bottom plate, the top piece, the chip and the partition plate are respectively provided with a fluid hole and a bypass hole, and the chip and the bypass hole of the partition plate are connected in series and brazed to form the bypass flow channel. The bypass flow channel extends to the first flow path of the cooling core body, the second medium flow channel is divided into a plurality of flow paths through the partition plates, the flow paths can prolong the flowing length of media, and the heat exchange efficiency is improved. Protruding lines can be arranged on the chips and the partition plates, or heat exchange fins can be placed in interlayer flow channels so that turbulent flow can be enhanced, and heat exchange can be enhanced. 一种带旁通流道的多流程板式换热器，该换热器的第二介质进出口设在同一侧且为