Recuperator, the Heat-Exchanging Channels of which Extend Transversely of the Main Flow Direction

Abstract

The invention relates to a recuperator ( 7 ), comprising at least a recuperator unit with heat-exchanging channels ( 5, 6 ) extending parallel to each other, a first header ( 63 ) placed on a first side of the recuperator unit and having a triangular cross-section, one surface of which connects to a first end of the heat-exchanging channels ( 5, 6 ) of the recuperator unit, a second header ( 64 ) placed on the second side of the recuperator unit and having a triangular cross-section, one surface of which connects to the second side of the heat-exchanging channels ( 5, 6 ) of the recuperator unit, supply ducts ( 1, 4 ) extending to a second surface of the first and the second header ( 63, 64 ) and discharge ducts ( 2, 3 ) extending from the third surface of the first and the second header ( 63, 64 ), wherein the supply ducts ( 1, 4 ) and the discharge ducts ( 2, 3 ) extend transversely of the longitudinal direction of the heat-exchanging channels ( 5, 6 ), wherein the supply ducts ( 1, 4 ) and the discharge ducts ( 3, 4 ) extend on the sides of the headers ( 63, 64 ) lying opposite the recuperator units.

1 . A recuperator, comprising:
 at least a first recuperator unit with heat-exchanging channels extending parallel to each other;   a first header placed on a first side of the recuperator unit and having a triangular cross-section, one surface of which connects to a first end of the heat-exchanging channels of the recuperator unit;   a second header placed on the second side of the recuperator unit and having a triangular cross-section, one surface of which connects to the second side of the heat-exchanging channels of the recuperator unit;   supply ducts extending to a second surface of the first and the second header; and   discharge ducts extending from the third surface of the first and the second header,   wherein the supply ducts and the discharge ducts extend transversely of the longitudinal direction of the heat-exchanging channels,   wherein   the supply ducts and the discharge ducts extend on the sides of the headers lying opposite the recuperator units,   the passage of the supply ducts decreases in the flow direction, and   the passage of the discharge ducts increases in the flow direction.   
     
     
         2 . The recuperator as claimed in  claim 1 , wherein the supply ducts and the discharge ducts extend substantially parallel to the intersecting line between the first and the second surface of the headers. 
     
     
         3 . The recuperator as claimed in  claim 1 , wherein the supply ducts and the discharge ducts extend substantially transversely of the intersecting line between the second and the third surface of the headers. 
     
     
         4 . The recuperator as claimed in  claim 3 , wherein in that the recuperator is provided with at least a second recuperator unit. 
     
     
         5 . The recuperator as claimed in any of  claim 1 , wherein the recuperator is placed in a rectangular housing. 
     
     
         6 . The recuperator as claimed in  claim 1 , wherein
 the recuperator unit has a round form and extends between two concentric cylinders,   the channels extend radially relative to the cylinders,   the first header is situated on the inner side of the recuperator unit,   the second header is situated on the outer side of the recuperator unit,   the supply and discharge ducts extend in the axial direction of the cylinders,   one supply duct and one discharge duct extend on the inner side of the recuperator unit, and   one supply duct and one discharge duct extend on the outer side of the recuperator unit.   
     
     
         7 . The recuperator as claimed in  claim 6 , wherein a substantially tubular distributor is arranged between the central supply duct and discharge duct on the one hand and the heat-exchanging channels on the other, which distributor is divided into sections by means of internal extensions of walls extending between the heat-exchanging channels, and that each of the sections is connected to the discharge duct or to the supply duct, and that a substantially tubular distributor is arranged between the supply duct and discharge duct arranged on the periphery on the one hand and the heat-exchanging channels on the other, which distributor is divided into sections by means of extensions of walls extending between the heat-exchanging channels, and that each of the sections is connected to the discharge duct or supply duct arranged on the periphery. 
     
     
         8 . The recuperator as claimed in  claim 1 , wherein the recuperator unit is provided with plates which extend parallel to each other and which separate channels of different sort and extend transversely of the intersecting line between the second and the third surface of the headers. 
     
     
         9 . The recuperator as claimed in  claim 8 , wherein at least some of the number of plates are provided with a profile which defines channels. 
     
     
         10 . The recuperator as claimed in  claim 1 , wherein the recuperator is placed in a housing with the form of a straight circular cylinder. 
     
     
         11 . The recuperator as claimed in  claim 10 , wherein the central axis of the recuperator unit extends at an angle to the axis of the cylindrical housing. 
     
     
         12 . The recuperator as claimed in  claim 11 , wherein a controllable alternating valve is arranged against both end walls of the housing on either side of the recuperator unit and connected for repetitively and simultaneously alternating the inlet channel and the outlet channel, and that the recuperator is a recuperator configured to recover latent heat. 
     
     
         13 . The recuperator as claimed in  claim 12 , wherein the alternating valves are both provided with a fixedly arranged valve seat provided with openings, which openings are connected to a supply duct or discharge duct, and with a rotatable valve disc connecting to the valve seat and provided with openings. 
     
     
         14 . The recuperator as claimed in  claim 13 , wherein at least one bypass channel is arranged in the housing and that the bypass channel is connected to openings arranged in both valve seats. 
     
     
         15 . The recuperator as claimed in  claim 13 , wherein the valve seats are provided with closed parts and that the valve discs are movable into a position in which the openings in the valve discs are closed by closed parts of the valve seat. 
     
     
         16 . The recuperator as claimed in  claim 13 , wherein the valve discs are movable in axial direction and that the recuperator is provided with a control member configured to move the valve in axial direction away from the valve seat prior to a change in the position of the valve and to move the valve toward the valve seat after a change in the position of the valve. 
     
     
         17 . The recuperator as claimed in  claim 13 , wherein the rotatable valves are provided with an outward extending, substantially cylinder jacket-like wall part which connects to the valve disc and is co-rotatable with the valve disc, that the valve seats are each connected to a substantially cylinder jacket-like fixed wall part which is in contact with the associated rotatable wall part, that in both wall parts openings are arranged which, depending on the position of the valve disc, can be brought into overlap and that the openings arranged in the fixed wall part are connectable to the surrounding area or to the indoor space. 
     
     
         18 . The recuperator as claimed in  claim 17 , wherein the substantially cylinder jacket-like parts of the rotatable valves and the parts of the housing connecting thereto take a slightly conical form. 
     
     
         19 . The recuperator as claimed in  claim 8 , wherein the plates are provided with guide means for guiding the change in direction of the airflows entering and exiting the channels. 
     
     
         20 . The recuperator as claimed in  claim 8 , wherein the plates are provided on at least one side with a layer of SiO 2 .