Plate heat exchangers are heat exchangers formed by pressing thin metal plates (usually stainless steel) into a specific wavy shape, then adding sealing rubber gaskets and stacking them. They are mainly composed of plates, sealing rubber gaskets, clamping bolts, pressure plates, and the overall frame. Cold and hot media flow through their respective channels between adjacent heat exchange plates, exchanging heat through the thin intermediate heat exchange plate layer. They feature high efficiency and energy saving, high heat exchange coefficient, safety and reliability, compact structure, small footprint, flexible assembly, and convenient adjustment and maintenance.