Integrated circuit for circulating fluids for gas-absorption heat pumps

Abstract

A circuit for circulating fluids, in particular for gas-absorption heat pumps, made from a single integrated structure consisting of a compact tube bundle and two connection plates which provide mechanical and fluid connection to the tubes of the tube bundle by virtue of a plurality of internal channels.

1 . A circuit for circulating fluids for gas-absorption heat pumps, comprising a tube bundle adapted to circulate a plurality of fluids and in turn comprising a plurality of tubes and two connection plates adapted to be connected each, by welding, to a different end of the tube bundle and comprising a plurality of internal channels, each adapted to connect fluidly at least two tubes of said plurality of tubes, to adapt said plurality of tubes to circulate various fluids in order to obtain an assembly of gas-absorption heat pumps components or heat exchangers which can be different in function and operating conditions, and where various fluid circuits run. 
     
     
         2 . The circuit according to  claim 1 , wherein the tubes of said plurality of tubes have various diameters. 
     
     
         3 . The circuit according to  claim 1  wherein the tubes of the tube bundle all substantially have the same height and the connection plates have a substantially flat structure. 
     
     
         4 . The circuit according to  claim 1  wherein said connection plates comprise a series of holes adapted to engage the ends of the tubes of said tube bundle so as to promote the welding thereof to the plate, said holes each having shape and size which are compatible with the diameter of the corresponding tube. 
     
     
         5 . The circuit according to  claim 4 , wherein said holes are connected to at least one internal channel of said plate. 
     
     
         6 . The circuit according to  claim 1  wherein said holes are further connectable to external connection tubes adapted to connect the tube bundle to the other parts of a circuit for circulating refrigerants for gas-absorption heat pumps. 
     
     
         7 . The circuit according to  claim 1  wherein at least one channel comprises a plurality of channels made on several layers so as to obtain various fluid connections placed in parallel and isolated from one another. 
     
     
         8 . The circuit according to  claim 1  wherein said plate comprises at least one connection between the hole and the corresponding tube of the tube bundle and/or the corresponding external connection tube. 
     
     
         9 . The circuit according to  claim 1  wherein said plate comprises, on the opposite sides, facing holes in various amounts and diameters. 
     
     
         10 . The circuit according to  claim 1  wherein said plate comprises supports adapted to allow performing the welding while avoiding or limiting metal deformations. 
     
     
         11 . The circuit according to  claim 1  wherein said plate comprises thermal break grooves adapted to decrease the conduction heat transfer between different parts of the plate. 
     
     
         12 . The circuit according to  claim 1  wherein said circuit is made of steel.