The utility model relates to the technical field of plate type evaporators, and discloses a novel rectangular grid plate
evaporator which comprises a bottom plate, movable grooves are formed in the positions, close to the front end and the rear end, of the upper end face of the bottom plate, and threaded rods are rotationally embedded in the two movable grooves. And movable rods are arranged on the outer surfaces of the two threaded rods and the positions, close to the front end and the rear end, of one side of the upper end face of the bottom plate correspondingly, a first clamping plate is arranged between the two movable rods, located on one side, of the four movable rods, and a second clamping plate is arranged between the two movable rods, located on the other side, of the four movable rods. According to the
heat exchanger, the rectangular supporting blocks are arranged on the upper end face of the first
evaporation plate and the upper end face of the second
evaporation plate, a liquid film formed between fluid and a heat exchange face can be effectively damaged in the using process, the fluid can be better evaporated, and an arranged movable rod can drive a first clamping plate to move and be adjusted; therefore, the number of the
evaporation plates can be better increased or decreased according to different requirements.