Plate heat exchanger with adjustable heat exchange area

The invention provides a heat exchange area adjustable plate heat exchanger which comprises a fixing mechanism, the fixing mechanism comprises an upper fixing plate and a lower fixing plate, mounting holes are formed in the two sides of the lower portion of the lower fixing plate, the upper fixing plate is clamped to the middles of two sets of side locking rods, and a plurality of sets of heat exchange pieces are arranged between the upper fixing plate and the lower fixing plate. The heat exchange fins comprise a plurality of groups of heat dissipation plate structures which are distributed in parallel, the heat exchange fins comprise fixed heat dissipation fins and movable heat dissipation fins, and a partition plate is arranged below the fixed heat dissipation fins. The side grooves are formed in the inner sides of the middles of the movable sliding grooves, lateral structural supporting blocks are provided through the side grooves, and the stability of movable mounting and dismounting of the movable coolin