A plate cooler is a high-efficiency heat exchanger made up of a series of metal plates with a certain wavy shape stacked together. The plates form thin rectangular channels between them, with heat exchange occurring through the half-plates. Compared to conventional tube-and-shell heat exchangers, it has a significantly higher heat transfer coefficient under the same flow resistance and pump power consumption, showing a tendency to replace tube-and-shell heat exchangers within its applicable range. The main types of plate heat exchangers are frame-type (removable) and brazed-type, with the plate shapes primarily being V-shaped wavy plates, horizontal flat wavy plates, and nodular plates.