Heat exchanger and corresponding production method

Patent metadata

Field	Value
Publication number	US-11819903-B2
Application number	US-201917418517-A
Country	US
Kind code	B2
Filing date	Dec 27, 2019
Priority date	Dec 27, 2018
Publication date	Nov 21, 2023
Grant date	Nov 21, 2023

Abstract

Heat exchanger, and production method, including at least two plates of metal material, overlapping and reciprocally joined together so as to define a perimeter edge of the heat exchanger, and at least one circuit for the passage of a heat-carrier fluid defined by at least one or more heat exchange channels made between the plates.

First claim

The invention claimed is:

1. A method to produce a heat exchanger ( 10 , 10 ′), comprising at least two plates ( 11 , 12 ) of metal material having a pre-defined shearing perimeter, overlapping and joined together so as to define a perimeter edge ( 13 ) beyond the shearing perimeter and at least one circuit ( 14 ) for the passage of a heat-carrier fluid defined by at least one or more heat exchange channels ( 15 ) made between said plates ( 11 , 12 ), wherein said method comprises:
at least one deposition step, to deposit on at least one of two plates ( 11 , 12 ) a detaching material according to the shape and the path of the heat exchange circuit ( 14 ) to be obtained;
the overlapping and hot rolling of said plates ( 11 , 12 ) with in the middle the template of the circuit ( 14 ) made of detaching material;
the introduction of a fluid under pressure from at least one aperture made on a perimeter edge ( 13 ) made by overlapping the plates ( 11 , 12 ) and consequent deformation of at least one of the plates ( 11 , 12 ) in correspondence with said detaching material, thus obtaining, by inflation, one or more channels ( 15 ) and at least one heat exchange portion ( 19 , 19 ′) extending beyond the shearing perimeter and situated in proximity to the perimeter edge ( 13 ) of the heat exchanger, that is, at a minimum distance (D 1 ) from said perimeter edge ( 13 ),
cutting the plates ( 11 , 12 ) along the shearing perimeter, resulting in an exposed aperture of the heat exchange portion ( 19 , 19 ′), and
closing the exposed aperture in a finishing step, thereby forming a closing edge ( 20 , 20 ′) of the heat exchange portion ( 19 , 19 ′).

2. The method as in claim 1 , wherein said closing edge ( 20 , 20 ′) is made by bending the perimeter edge ( 13 ) of the plates ( 11 , 12 ).

3. The method as in claim 1 , wherein said closing edge ( 20 , 20 ′) is made by welding the plates ( 11 , 12 ) in the finishing step in proximity to said perimeter edge ( 13 ) of the heat exchanger ( 10 , 10 ′).

4. The method as in claim 1 , wherein said closing edge ( 20 , 20 ′) is made by gluing the plates ( 11 , 12 ) in the finishing step in proximity to said perimeter edge ( 13 ), and subsequent shearing.

5. The method as in claim 1 , wherein, to obtain said heat exchange portion ( 19 , 19 ′), at least one strip of detaching material is disposed between said plates ( 11 , 12 ) beyond the perimeter edge ( 13 ) of the heat exchanger ( 10 , 10 ′).

6. A heat exchanger obtained with the method as in claim 1 , comprising the at least two plates ( 11 , 12 ) of metal material, overlapping and reciprocally joined together so as to define the perimeter edge ( 13 ) of the heat exchanger and the at least one circuit ( 14 ) for the passage of a heat-carrier fluid defined by the at least one or more heat exchange channels ( 15 ) made between said plates ( 11 , 12 ), wherein said circuit ( 14 ) is provided with the at least one heat exchange portion ( 19 , 19 ′) having the at least one closing edge ( 20 , 20 ′) which is made in proximity to the perimeter edge ( 13 ) of the heat exchanger, that is, at a minimum distance (D 1 ) from said perimeter edge ( 13 ) variable from about 3 mm to about 7 mm.

7. The heat exchanger as in claim 6 , wherein the width (L 1 , L 2 ) of said heat exchange portion ( 19 , 19 ′) is greater than the width of a single heat exchange channel ( 15 ).

8. The heat exchanger as in claim 6 , wherein said heat exchange portion ( 19 ′) is defined by at least one channelized area made on said heat exchange circuit ( 14 ) and provided with a series of branching points ( 17 ).

9. The heat exchanger as in claim 6 , wherein said heat exchange portion ( 19 ) comprises one or more holes ( 21 ) for the inlet or outlet of the heat-carrier fluid to/from the heat exchanger.

Assignees

• Cga Tech S R L
• A Raymond Et Cie

Inventors

• Colugnati Giorgio
• Giamei Pietro

Classifications

• B21D53/045 Primary

  by inflating partially united plates · CPC title

• F25B39/024

  with elements constructed in the shape of a hollow panel · CPC title

• F28F3/14 Primary

  by separating portions of a pair of joined sheets to form channels, e.g. by inflation (manufacture thereof B23P) · CPC title

• F28D2021/0071

  Evaporators · CPC title