Collector plate for a motor vehicle heat exchanger

1. A collector plate for a motor vehicle heat exchanger, comprising:

a first receiving zone for tubes of a first tube bundle of the heat exchanger;

a second receiving zone for tubes of a second tube bundle of the heat exchanger; and

a groove extending between the first and second receiving zones,

the collector plate being thinner in a region of the groove,

wherein the collector plate comprises a channel reducing a thickness of the collector plate from a first face of the collector plate, opposing a second face of the collector plate comprising the groove, and

wherein the channel is a circular indentation on the first face of the collector plate.

2. The collector plate as claimed in claim 1 , wherein the thinning in the region of the groove corresponds to a minimum thickness of the collector plate in the region of the groove, which is greater than 50% and/or less than 75% of a maximum thickness of the collector plate in the region of the groove.

3. The collector plate as claimed in claim 1 , wherein the groove is defined by a fold of the collector plate.

4. The collector plate as claimed in claim 3 , wherein the fold has a U-shaped cross section.

5. The collector plate as claimed in claim 4 , wherein the thinning of the collector plate is located in a region of one or more angles of the U-shaped cross section of the fold.

6. The collector plate as claimed in claim 1 , wherein on the second face of the collector plate the groove is configured to be oriented toward a cover forming with the collector plate at least one water chamber.

7. The collector plate as claimed in claim 1 , of substantially rectangular shape, with rounded corners,

wherein the collector plate comprises a rectangular shape with rounded corners, and

wherein the groove extends in a longitudinal direction of the collector plate.

8. The collector plate as claimed in claim 1 , wherein the first and/or the second receiving zones for tubes comprise a plurality of slots which are preferably parallel to one another, each slot out of the plurality of slots is configured to be traversed by the end of one respective tube.

9. The collector plate as claimed in claim 8 ,

wherein said each slot out of the plurality of slots is at a top of a respective projection of the collector plate,

wherein the respective projection is of an oblong shape, a length of the oblong shape being further preferably substantially perpendicular to the groove, and

wherein the respective projections protrude from the second face of the collector plate with the groove.

10. The collector plate as claimed in claim 1 , forming a recess about the first and second receiving zones, the groove leading into the recess on either side.

11. A heat exchange device for a motor vehicle comprising a radiator for cooling the engine of the motor vehicle, with two methodical passes, comprising:

a first and a second tube bundle;

a first collector plate and a second collector plate;

at least one first single cover fixed to the first collector plate and forming a water inlet and a water outlet; and

a second cover fixed to the second collector plate and forming a guide for the water between the first tube bundle and the second tube bundle,

the first collector plate comprising:

a first receiving zone for tubes of a first tube bundle of a heat exchanger,

a second receiving zone for tubes of a second tube bundle of the heat exchanger, and

a groove extending between the first and second receiving zones,

wherein the first collector plate being thinner in a region of the groove,

wherein the collector plate comprises a channel reducing a thickness of the collector plate from a first face of the collector plate, opposing a second face of the collector plate comprising the groove, and

wherein the channel is a circular indentation on the first face of the collector plate.

12. The heat exchange device as claimed in claim 11 , further comprising a first seal ring which is received in the groove of the first collector plate arranged between the first collector plate and a wall of the first cover, to separate a distribution space, which places the water inlet and the first tube bundle in fluidic communication, from a collection space, which places the water outlet and the second tube bundle in fluidic communication, the seal ring being of U-shaped cross section.

13. The heat exchange device as claimed in claim 11 , wherein the first collection plate forms a recess about the first and second receiving zones, the groove leading into the recess on either side, the recess receiving a single second seal ring clamped between the first collector plate and a wall of the first cover, the seal ring being of U-shaped cross section.

14. The heat exchange device as claimed in claim 13 , wherein the second seal ring has a shape of a figure of an eight with a central arm, the central arm forming the first seal ring which is received in the groove of the first collector plate.

15. A collector plate for a motor vehicle heat exchanger, comprising:

a first receiving zone for tubes of a first tube bundle of the heat exchanger;

a second receiving zone for tubes of a second tube bundle of the heat exchanger; and

a groove extending between the first and second receiving zones,

wherein the collector plate thinning in a region of the groove, thereby forming a deformation notch in the region of the groove, enabling adaptation of the collector plate to different expansions of the tubes of the first and second bundles,

wherein the thinning facilitates relative pivoting of the first and second receiving zones about the thinning,

wherein the collector plate comprises a channel reducing a thickness of the collector plate from a first face of the collector plate, opposing a second face of the collector plate comprising the groove, and

wherein the channel is a circular indentation on the first face of the collector plate.