Electrical heating device for a motor vehicle and vehicle and associated air-conditioning and/or heating unit

Patent metadata

Field	Value
Publication number	US-9975402-B2
Application number	US-201214342845-A
Country	US
Kind code	B2
Filing date	Sep 3, 2012
Priority date	Sep 6, 2011
Publication date	May 22, 2018
Grant date	May 22, 2018

Abstract

The invention relates to an electrical liquid heating device for a motor vehicle. The heating device comprises at least a first ( 7 a ) and a second ( 7 b ) heating module for heating the aforementioned liquid, defining at least one circuit ( 15 ) for guiding the liquid to be heated. The device is characterized in that the heating modules ( 7 a, 7 b ) each have a generally cylindrical shape and are arranged side by side substantially in parallel. The invention also relates to a heating and/or air-conditioning unit for a motor vehicle, comprising such a heating device ( 5 ).

First claim

The invention claimed is:

1. An electrical liquid heating device for a motor vehicle, the heating device comprising at least one first ( 7 a ) and one second ( 7 b ) module for heating the liquid and defining at least one liquid flow path ( 15 ) for guiding the liquid to be heated, wherein the heating modules ( 7 a , 7 b ) each have an approximately cylindrical overall shape and are positioned side by side in an approximately parallel manner, wherein the heating modules ( 7 a , 7 b ) each comprise a core ( 11 ) and a heating means ( 13 ) comprising heating elements which surrounding the core ( 11 ) so as to define one of the at least one liquid flow path ( 15 ) for guiding the liquid around the core ( 11 ), wherein each of the heating modules ( 7 a , 7 b ) are received in an associated housing of the heater ( 5 ), wherein a longitudinal axis (A) disposed through a center of each of the heating modules ( 7 a , 7 b ) are parallel such that the longitudinal axes (A) are not coincident and extensions of the longitudinal axes (A) do not meet, and wherein the core ( 11 ) includes a plurality of grooves ( 16 ) disposed on its external surface, wherein the core ( 11 ) of at least one heating module ( 7 a , 7 b ) has at least one communication orifice ( 14 ) and an internal cavity ( 12 ) capable of communicating with the liquid flow path ( 15 ) through the at least one communication orifice ( 14 ) such that the liquid is able to flow between the heating means ( 13 ) and the core ( 11 ) from an inlet canal ( 23 ) to the communication orifice ( 14 ) where the liquid enters the internal cavity ( 12 ) before exiting the core ( 11 ).

2. The device as claimed in claim 1 , wherein the at least one first ( 7 a ) and one second ( 7 b ) heating modules define at least two serial guiding circuits ( 15 ).

3. The device as claimed in claim 2 , further comprising at least one communicating canal ( 26 ) between the guiding circuits ( 15 ) of the at least one first ( 7 a ) and one second ( 7 b ) heating modules.

4. The device as claimed in claim 3 , wherein the serial guiding circuits ( 15 ) define an approximately “U”-shaped path.

5. The device as claimed in claim 1 , wherein the at least one first ( 7 a ) and one second ( 7 b ) heating modules define at least two approximately parallel guiding circuits ( 15 ).

6. The device as claimed in claim 1 , wherein the core ( 11 ) of at least one heating module ( 7 a , 7 b ) comprises air that is able to be compressed under the effect of the expansion of the heated liquid, such that the internal cavity ( 12 ) forms an expansion vessel.

7. The device as claimed in claim 6 , wherein the core ( 11 ) comprises an expansion control system ( 39 , 41 , 43 ).

8. The device as claimed in claim 7 , wherein the expansion control system ( 39 , 41 ) has at least one calibrated passage ( 41 ), through which the liquid is able to circulate.

9. The device as claimed in claim 7 , wherein the expansion control system ( 43 ) is configured to slide along the internal cavity ( 12 ) of the core ( 11 ).

10. The device as claimed in claim 1 , further comprising at least one liquid inlet tube ( 19 ) and at least one liquid outlet tube ( 21 ) communicating with the guiding circuit ( 15 ) defined by the at least one first ( 7 a ) and one second ( 7 b ) heating modules.

11. The device as claimed in claim 10 , wherein the inlet tube ( 19 ) communicates with the guiding circuit ( 15 ) of the first heating module ( 7 a ), and wherein the outlet tube ( 21 ) communicates with the guiding circuit ( 15 ) of the second heating module ( 7 b ).

12. The device as claimed in claim 10 , wherein the inlet tube ( 19 ) and/or the outlet tube ( 21 ) is/are located in the device in a manner approximately parallel to the longitudinal axis (A) of a heating module ( 7 a , 7 b ).

13. The device as claimed in claim 10 , wherein the inlet tube ( 19 ) and the outlet tube ( 21 ) are located on one and the same side of the device.

14. The device as claimed in claim 10 , wherein the inlet tube ( 19 ) is located on a first side of the device, and in that the outlet tube ( 21 ) is located on a second side of the device, opposite the first side.

15. The device as claimed in claim 10 , wherein the at least one inlet tube ( 19 ) and at least one outlet tube ( 21 ) are oriented in the same direction.

16. The device as claimed in claim 10 , wherein the at least one inlet tube ( 19 ) and at least one outlet tube ( 21 ) are oriented in two opposite directions.

17. The device as claimed in claim 10 , wherein the core ( 11 ) of a heating module ( 7 a , 7 b ) has at least one groove ( 16 ) on its external face facing the heating means ( 13 ).

18. The device as claimed in claim 10 , wherein the core ( 11 ) of a heating module ( 7 a , 7 b ) has at least one longitudinal internal circulation canal ( 35 ).

19. A heating and/or air-conditioning unit for a motor vehicle comprising at least one heating device as claimed in claim 1 .

20. The device as claimed in claim 1 , wherein the grooves ( 16 ) are helical grooves configured to define a helical path through the circuit ( 15 ) for guiding the liquid to be heated.

Assignees

• Pierron Frederic
• Tellier Laurent
• Leborgne Jose
• Valeo Systemes Thermiques

Inventors

• Pierron Frederic
• Tellier Laurent
• Leborgne Jose

Classifications

• F01P2070/04

  using electrical heating elements · CPC title

• B60H1/2221 Primary

  arrangements of electric heaters for heating an intermediate liquid (B60H1/034 takes precedence) · CPC title

• F24H9/0015

  in water channels · CPC title

• F01P2060/08

  Cabin heater · CPC title

• F24H1/101

  using electric energy supply · CPC title