A compact heat recovery ventilation system

Abstract

The heat exchanger assembly comprises a heat-exchanger that could be done as changeable flow side heat-exchanger made as folded corrugated fins or plates, thus each of the both flow passages split in separate flow channels. Every other channel is sealed to flow from flow same direction forcing the flow to be in opposite direction in all adjacent cannels. This forms two hydraulically isolated flow passages with intake and outtake openings connected respectively with outlet and inlet openings of the air blower assembly.

What claimed is: 
     
         1 . A compact heat recovery ventilation system comprising
 an air module assembly with exhaust gas inlet, exhaust gas outlet and fresh gas inlet, fresh gas outlet,   heat exchanger assembly with exhaust gas intake, exhaust gas outtake and fresh gas intake, fresh gas outtake,   
       wherein:
 said air module assembly comprises two side panels, base plate placed between two radial blowers surrounded by airflow guides and located on a common axis between each said side panel and said base plate forming two hydraulically isolated counter flow canals between said exhaust gas inlet and said exhaust gas outlet and between said fresh gas outlet and said fresh gas inlet. 
 said heat exchanger assembly comprising heat exchange elements surrounded by outside panels with two open ends, each of said open end divided by a center plate to two separated isolated flow conduits with said exhaust gas intake, said exhaust gas outtake and said fresh gas outtake, said fresh gas intake, where said fresh gas outtake of said conduit hydraulically connected to said fresh gas inlet of said canal and said exhaust gas intake of said conduit hydraulically connected to said exhaust gas outlet of said canal. 
 
     
     
         2 . The compact heat recovery ventilation system per  claim 1  wherein said side panels are parallel to said base plate. 
     
     
         3 . The compact heat recovery ventilation system according to  claim 1  wherein said base plate of the air module assembly made from two plates divided in plane perpendicular to the thickness of said base plate. 
     
     
         4 . The compact heat recovery ventilation system according to  claim 1  wherein said base plate is parallel to the said outside panels and the center plate. 
     
     
         5 . The compact heat recovery ventilation system according to  claim 1  wherein said side panels are directly connected to said outside panels to form substantially continuous surfaces and said base plate is directly connected to said center plate to form a substantially continuous plate. 
     
     
         6 . The compact heat recovery ventilation system according to  claim 1  wherein the air module assembly connected to heat exchanger assembly through a flat transition with two airflow ducts. 
     
     
         7 . The compact heat recovery ventilation system according to  claim 1  wherein the air module assembly connected to heat exchanger assembly through a L-shape transition with two airflow ducts. 
     
     
         8 . The compact heat recovery ventilation system according to  claim 1  wherein said compact heat recovery ventilation system is hidden within a structure envelope inside a building wall, a window frame or a ceiling. 
     
     
         9 . The compact heat recovery ventilation system according to  claim 1  wherein said system includes two said radial blowers each comprising a radial impeller, said impellers integrated with electric drive and each said impeller spaced from the respective side of said base plate, each of said radial impellers located at one of said canals. 
     
     
         10 . The compact heat recovery ventilation system according to  claim 9  wherein each of said radial impellers comprises set of radial blades fixed on a back plate disk placed in a cylindrical cavity of said base plate. 
     
     
         11 . The compact heat recovery ventilation system according to  claim 10  wherein each of said back plate made from ferrous metal. 
     
     
         12 . The compact heat recovery ventilation system according to  claim 10  wherein at least one of the back plates includes set of permanent magnets and along with second said back plate comprises a rotor of said electric drive. 
     
     
         13 . The compact heat recovery ventilation system according to  claim 9  wherein said electric drive comprises a flat stator made as circumferential arrayed coil windings with magnetic axes perpendicular to a plane of said flat stator and integrated with said base plate, while said magnetic elements made as circumferential arrayed permanent magnets magnetized perpendicular to the plane of said flat stator, thus magnetic axes said coils windings and said magnets are substantially parallel. 
     
     
         14 . The compact heat recovery ventilation system according to  claim 9  wherein a stator of said electric drive made as a stator comprising circumferential arrayed coils windings with magnetic axes coincided with a plane of said stator and fixed with said base plate and when electrically powered, creates alternating electromagnetic fields which interact with a said permanent magnets of said rotor thus providing a rotation of said two radial impellers. 
     
     
         15 . The compact heat recovery ventilation system according to  claim 13  wherein the flat stator located between two said divided sections of the said base, thus said cylindrical cavities, said stator and said back plates of the rotor creating a labyrinth hydraulically isolating said two canals of said air module assembly. 
     
     
         16 . The compact heat recovery ventilation system according to  claim 12  wherein outside diameters of said rotors are larger than diameters of said blades of the radial impellers. 
     
     
         17 . The compact heat recovery ventilation system according to  claim 9  wherein at least one of said radial impellers is a cross flow type. 
     
     
         18 . The compact heat recovery ventilation system according to  claim 9  wherein both of said radial impellers are the cross flow type. 
     
     
         19 . The compact heat recovery ventilation system according to  claim 9  wherein both of said radial impellers rotate in one direction. 
     
     
         20 . The compact heat recovery ventilation system according to  claim 17  wherein said crossflow impeller further comprises at least one guide vane surrounded by said radial blades; 
     
     
         21 . The compact heat recovery ventilation system according to  claim 1  wherein said heat exchanging elements protruding from both sides of said center plate up to said outside panels. 
     
     
         22 . The compact heat recovery ventilation system according to  claim 1  wherein said heat exchanging elements shaped as corrugated fins made as a plurality of channels divided by said center plate to one said intake and one said outtake openings at one said open end and one said outtake and one said intake openings at the other said open end in a way that every even channel of said corrugated fins is sealed at said intake openings while every odd channel is sealed at said outtake openings on said another, thus every other channel is having opposite flow direction to every neighboring channel. 
     
     
         23 . The compact heat recovery ventilation system according to  claim 21  wherein said center plate has a flat portion across all said corrugated fins and a plurality dividers perpendicular to said flat portion and spaced with a double distance of the distance between neighboring said corrugated fins thus each said divider would seal every other said corrugated fin at said intake. 
     
     
         24 . The compact heat recovery ventilation system according to  claim 22  wherein said center plate has a flat portion across all said corrugated fins and a plurality dividers perpendicular to said flat portion and spaced with a double distance of the distance between neighboring said corrugated fins thus each said divider would seal every other said corrugated fin at said outtake. 
     
     
         25 . The compact heat recovery ventilation system according to  claim 1  wherein said heat exchanging elements made from plurality of even and odd plates forming plurality of said channels and said center plate that has a flat portion across all said plates from both said open ends and at one said open end at said intake each pair of said even and said odd plates bended towards each other and sealed and at another said open end at said intake each pair of odd and even said plates bended towards each other and sealed and at one said open end at said outtake each pair of said odd and said even plates bended towards each other and sealed and at another said open end at said outtake each pair of said even and said odd plates bended towards each other and sealed. 
     
     
         26 . The compact heat recovery ventilation system according to  claim 24  wherein central portion of said plates at the both said open ends has a bend perpendicular to the plate creating said center plate across all said channels thus separates the intakes and outtakes and any said channel is having opposite flow direction to every next said channel. 
     
     
         27 . The compact heat recovery ventilation system according to  claim 2 , wherein the common axis of the radial blowers is perpendicular to the side panels. 
     
     
         28 . The compact heat recovery ventilation system according to  claim 1  wherein at least one of said radial blowers is a cross flow type. 
     
     
         29 . The compact heat recovery ventilation system according to  claim 1  wherein both of said radial blowers are the cross flow type. 
     
     
         30 . The compact heat recovery ventilation system according to  claim 1  wherein both of said radial blowers rotate in one direction.