Heat exchanger having electric heating elements

Patent metadata

Field	Value
Publication number	US-9457641-B2
Application number	US-201214007464-A
Country	US
Kind code	B2
Filing date	Feb 29, 2012
Priority date	Mar 28, 2011
Publication date	Oct 4, 2016
Grant date	Oct 4, 2016

Abstract

The invention relates to an electrical heating device ( 1 ) including a heating body in which at least one electric heating element ( 8 ) is installed, the operation of said electric heating element being dependent on a control module ( 3 ) constituting the heating device, the heating body ( 2 ) including walls ( 5 ) at least partially defining a cavity ( 6 ) in which the control module ( 3 ) is accommodated, characterized in that the electrical heating element ( 8 ) and the control module ( 3 ) are suitable for being supplied with a so-called low voltage of between 80 and 600 volts, and in that an electrical insulator ( 17 ), which covers the walls ( 5 ) defining the cavity, is provided.

First claim

The invention claimed is:

1. An electric heating device ( 1 ) comprising a heating body ( 2 ) in which is installed at least one electric heating element ( 8 ), the operation of which is placed under the dependency of a control module ( 3 ) that is a constituent of the heating device ( 1 ), the heating body ( 2 ) comprising walls ( 5 ) delimiting, at least partially, a cavity ( 6 ) closed by a cover ( 16 ) made of a metal material in which the control module ( 3 ) is housed wherein the electric heating element ( 8 ) and the control module ( 3 ) are suitable for being powered at low voltage and the control module ( 3 ) comprises a first part ( 22 ) passed through by the low voltage, and a second part ( 23 ) passed through by a voltage of between 5 and 48 volts, and wherein an electrical insulator ( 17 ) is provided which covers the walls ( 5 ) delimiting the cavity ( 6 ).

2. The device ( 1 ) as claimed in claim 1 , in which the walls ( 5 ) which delimit the cavity ( 6 ) are at least one bottom wall ( 18 ) and peripheral walls ( 12 ) perpendicular to the bottom wall ( 18 ).

3. The device ( 1 ) as claimed in claim 1 , in which the heating body ( 2 ) comprises a tube bundle ( 4 ) passed through by a flow to be heated, wherein the tube bundle ( 4 ) and the walls ( 5 , 12 , 18 ) are joined together to form a single-piece unit.

4. The device ( 1 ) as claimed in claim 1 , in which the electrical insulator ( 17 ) is a flexible sheet with a form complementing the form of the walls ( 5 , 12 , 18 ) delimiting the cavity ( 6 ).

5. The device ( 1 ) as claimed in claim 4 , in which the flexible sheet has at least one through hole ( 21 ) through which passes at least one electrical conductor ( 20 ) powering the electric heating element ( 8 ).

6. The device ( 1 ) as claimed in claim 1 , in which the cover ( 16 ) comprises the electrical insulator ( 17 ) arranged on its face turned toward the cavity ( 6 ).

7. The device ( 1 ) as claimed in claim 1 , in which the electrical insulator ( 17 ) is produced from separate and adjacent portions.

8. The device ( 1 ) as claimed in claim 3 , in which the single-piece unit is made of a metal material.

9. The device ( 1 ) as claimed in claim 1 , in which the electrical insulator ( 17 ) is a layer of insulating material sprayed onto an internal face of the walls ( 5 , 12 , 18 ) which delimit the cavity ( 6 ).

10. The device ( 1 ) as claimed in claim 1 , in which the first part ( 22 ) and the second part ( 23 ) are formed on one and the same printed circuit.

11. A ventilation and heating installation for a vehicle, driven by an electric motor, the installation comprising a heating device ( 1 ) as claimed in claim 1 .

12. The device ( 1 ) as claimed in claim 2 , in which the heating body ( 2 ) comprises a tube bundle ( 4 ) passed through by a flow to be heated, wherein the tube bundle ( 4 ) and the walls ( 5 , 12 , 18 ) are joined together to form a single-piece unit.

13. The device ( 1 ) as claimed in claim 3 , in which the electrical insulator ( 17 ) is a flexible sheet with a form complementing the form of the walls ( 5 , 12 , 18 ) delimiting the cavity ( 6 ).

14. The device ( 1 ) as claimed in claim 12 , in which the electrical insulator ( 17 ) is a flexible sheet with a form complementing the form of the walls ( 5 , 12 , 18 ) delimiting the cavity ( 6 ).

Assignees

• Pierron Frederic
• Tellier Laurent
• Valeo Systemes Thermiques

Inventors

• Pierron Frederic
• Tellier Laurent

Classifications

• B60H1/2225 Primary

  arrangements of electric heaters for heating air · CPC title

• H05B3/141 Primary

  Conductive ceramics, e.g. metal oxides, metal carbides, barium titanate, ferrites, zirconia, vitrous compounds · CPC title

• H05B3/42

  non-flexible · CPC title

• H05B2203/023

  Heaters of the type used for electrically heating the air blown in a vehicle compartment by the vehicle heating system · CPC title

• H05B3/50 Primary

  heating conductor arranged in metal tubes, the radiating surface having heat-conducting fins · CPC title