Layer-built heat exchanger

An arrangement in a layer-built heat exchanger, comprising:

• a first plate comprising a first flat rectangular panel having a plurality of first channels therein defined and separated by a plurality of first dividers for the flow of a first heat exchange fluid through said first channels, a pair of first holes through said first flat rectangular panel for the flow of the first heat exchange fluid, said first holes being located at opposite ends of said first channels, and a pair of second holes through said first flat rectangular panel for the flow a second heat exchange fluid;
• a second plate comprising a second flat rectangular panel having a plurality of second channels therein defined and separated by a plurality of second dividers for the flow of a second heat exchange fluid through said second channels, a pair of first holes through said second flat rectangular panel aligned with said first holes of said first plate for the flow of the first heat exchange fluid therethrough, and a pair of second holes through said second flat rectangular panel aligned with said second holes of said first plate for the flow of the second heat exchange fluid therethrough, said second holes being located at opposite ends of said second channels;
• a seal plate disposed between said first plate and said second plate, said seal plate having a pair of first holes therethrough aligned with said first holes of said first and second plates for the flow of the first heat exchange fluid, and a pair of second holes therethrough aligned with said second holes of said first and second plates;
• and
• opposite end plates having said first and second plates and said seal plate therebetween, one of said end plates having inlet and outlet pipes for the first and second heat exchange fluids communicating with said pairs of first and second holes, said inlet and outlet pipes extending through the respective said holes of said first and second plates and said seal plate to the other said end plate, and said inlet and outlet pipes each having an elongated hole therein extending between said end plates in said holes of said first and second plates and said seal plate.

An arrangement in a layer-built heat exchanger, comprising:

• a first plurality of plates each comprising a first flat rectangular panel having a plurality of first channels therein defined and separated by a plurality of first dividers for the flow of a first heat exchange fluid through said first channels, a pair of first holes through said first flat rectangular panel for the flow of the first heat exchange fluid located at opposite ends of said first channels, and a pair of second holes through said first flat rectangular panel for the flow a second heat exchange fluid;
• a plurality of second plates each comprising a second flat rectangular panel having a plurality of second channels therein defined and separated by a plurality of second dividers for the flow of a second heat exchange fluid through said second channels, a pair of first holes through said second flat rectangular panel aligned with said first holes of said first plates for the flow of the first heat exchange fluid therethrough, and a pair of second holes through said second flat rectangular panel aligned with said second holes of said first pleates for the flow of the second heat exchange fluid therethrough, said second holes of said second plates being located at opposite ends of said second channels, said second holes ofd said first plates being larger than said second holes of said second plates, and said first holes of said second plates being larger than said first holes of said first plates;
• and
• a plurality of seal plates disposed between said first plates and said second plates, said seal plates having a pair of first holes therethrough aligned with said first holes of said first and second plates for the flow of the first heat exchange fluid, and a pair of second holes therethrough aligned with said second holes of said first and second plates, said first holes and said second holes of said seal plates having substantially the same configuration as said first holes of said second plates and said second holes of said first plates, respectively, wherein said first plates and said second plates alternate with said seal plates disposed between said first and second plates so as to isolate said first and second plates from each other, wherein said first holes of said seal plates and said first holes of said second plates are located over said first holes of said first plates so as to define first buffer chambers over said first holes of the first plates, and said second holes of said first plates and said second holes of said seal plates are located over said second holes of said second plates to define second buffer chambers over said second holes of said second plates;
• wherein said ends of said first channels and said ends of said second channels of said first and second plates intrude into said first and second buffer chambers, and are located such that the length of said channels increases in said first and second buffer chambers with an increase in the distance of said channels from the center of their respective said hole.