PLATE HEAT EXCHANGER Russian patent published in 1995 - IPC

FIELD: heat power engineering. SUBSTANCE: heat exchanger has housing with coaxial inlet and outlet branch pipes and distributing and collecting chambers for one of the heat carriers. The chambers have flat face walls and cylindrical side walls. An assembly of corrugated plates is mounted inside the housing. The plates are interconnected in pair over periphery edges to define passages for both heat carriers by surfaces of intersecting corrugations. The side walls of the housing and plate edges, which abut upon them, are cylindrical. Ports are made in the plates. The ports are interconnected in pair to define the supplying and discharging cylindrical collectors partially entering in the distributing and collecting chambers. The edges of the ports are bent toward the flow in the supplying collector and in the direction of the flow in the discharging collector. The bent angle is in the rage of 0-60 deg. The bent angle decreases downstream in the supplying collector and increases downstream in the discharging collector. The plates are provided with lateral stampings which define Z-like passages. The ends of the stampings are rounded at the sites where flow changes its direction and face toward the flow. The top angle of corrugations is 40-80 deg. Seals are interposed between the edges of the assembly plates which abut upon the housing. The heat exchanger is provided with supplying and discharging branch pipes for the second heat carrier which are connected to one or both end face walls and pipes which are received in branch pipes and connected with respective collectors. The plates are symmetrical with respect to the axis parallel to the axis of the inlet and outlet branch pipes. The assembly of the heat exchanger is shifted with respect to the center of symmetry of the housing to provide 1.4-1.7 ratio of the lengths of front surface of the assembly from the side of supplying of the heat carrier. EFFECT: enhanced efficiency. 11 cl, 5 dwg