Heat exchanger collector box, in particular for a motor vehicle, and corresponding heat exchanger
A collector box ( 5 ) is a component of a heat exchanger for a motor vehicle, with the heat exchanger including a heat exchange core with a plurality of heat exchange tubes ( 3 ). The collector box ( 5 ) includes a fluid collector ( 9 ) with a flat bottom ( 13 ) to receive the ends of the tubes ( 3 ). The fluid collector ( 9 ) has two lateral walls ( 15 ) extending from the flat bottom ( 13 ) and respectively forming a curve between the lateral walls ( 15 ) and the flat bottom ( 13 ) of a radius (R) of between 1.5 and 4 mm. The fluid collector ( 9 ) has a ratio between the burst strength and the height (h) of the collector box ( 5 ) that is greater than 10.
1. A collector box ( 5 ) for a heat exchanger for a motor vehicle, the heat exchanger comprising a heat exchange core with a plurality of heat exchange tubes ( 3 ), wherein said collector box ( 5 ) comprises a fluid collector ( 9 ) with a flat bottom ( 13 ), wherein said flat bottom ( 13 ) receives the ends of the tubes ( 3 ), and wherein:
said fluid collector ( 9 ) has two lateral walls ( 15 ) extending from said flat bottom ( 13 ) and respectively forming a curve between said lateral walls ( 15 ) and said flat bottom ( 13 ) of a radius (R) of between 1.5 and 4 mm,
said collector box ( 5 ) further comprises a lid to close said fluid collector ( 9 ),
said fluid collector ( 9 ) is in the shape of a “U” having said flat bottom ( 13 ) and two lateral walls ( 15 ) extending from said flat bottom ( 13 ) and delimits a cavity ( 17 ), wherein said lateral walls ( 15 ) each include a crimping tab ( 21 ) at their ends which are configured to be bent over towards said cavity ( 17 ) such that said crimping tabs ( 21 ) press against a top external face of said lid and said lid is disposed within said cavity ( 17 );
wherein said lid is of a shape that complements the shape of said fluid collector ( 9 ) such that said lid includes a flat central wall ( 25 ), two lateral walls ( 27 ) extending from said flat central wall ( 25 ), and curvatures ( 29 ) forming connections between said flat central wall ( 25 ) and said two lateral walls ( 27 ) of said lid which complements the shape of said crimping tabs ( 21 ); and
wherein said collector box ( 5 ) has a height (h) of approximately 11 mm and has a thickness (e) of between 1 and 1.2 mm.
2. The collector box ( 5 ) as claimed in claim 1 , wherein said radius (R) ranges from 2 to 3 mm.
3. The collector box ( 5 ) as claimed in claim 1 , wherein said fluid collector ( 9 ) has flanges ( 19 ) to accept the ends of the tubes ( 3 ).
4. A heat exchanger for a motor vehicle, said heat exchanger comprising a heat exchange core with a plurality of heat exchange tubes ( 3 ) and at least one collector box ( 5 ) in accordance with claim 1 .
5. The heat exchanger as claimed in claim 4 , as a condenser for an air conditioning circuit in the motor vehicle.
6. The collector box ( 5 ) as claimed in claim 2 , further comprising said lid to close said fluid collector ( 9 ) of a shape that complements the shape of said fluid collector ( 9 ).
7. The collector box ( 5 ) as claimed in claim 1 , wherein said two lateral walls ( 15 ) and said flat bottom ( 13 ) delimit a single cavity.
8. The collector box ( 5 ) as claimed in claim 1 , wherein said lateral walls ( 15 ) extend substantially perpendicular from said flat bottom ( 13 ).
9. The collector box ( 5 ) as claimed in claim 1 , wherein said flat bottom ( 13 ) and said two lateral walls ( 15 ) form said “U” shape.
10. The collector box ( 5 ) as claimed in claim 1 , wherein said crimping tabs ( 21 ) of said collector ( 9 ) immobilize said lid inside said cavity ( 17 ).
11. The collector box ( 5 ) as claimed in claim 1 , wherein said fluid collector ( 9 ) has a ratio between a burst strength and the height (h) of said collector box ( 5 ) that is greater than 10 bar/mm, and wherein said burst strength corresponds to said radius (R) as a function of said radius (R).
12. A collector box ( 5 ) for a heat exchanger for a motor vehicle, the heat exchanger comprising a heat exchange core with a plurality of heat exchange tubes ( 3 ), wherein said collector box ( 5 ) comprises a fluid collector ( 9 ) with a flat bottom ( 13 ), wherein said flat bottom ( 13 ) receives the ends of the tubes ( 3 ), and wherein:
said fluid collector ( 9 ) has two lateral walls ( 15 ) extending from said flat bottom ( 13 ) and respectively forming a curve between said lateral walls ( 15 ) and said flat bottom ( 13 ) of a radius (R) of between 1.5 and 4 mm,
said collector box ( 5 ) further comprises a lid to close said fluid collector ( 9 ),
said fluid collector ( 9 ) is in the shape of a “U” having said flat bottom ( 13 ) and two lateral walls ( 15 ) extending from said flat bottom ( 13 ) and delimits a cavity ( 17 ), wherein said lateral walls ( 15 ) each include a crimping tab ( 21 ) at their ends which are configured to be bent over towards said cavity ( 17 ) such that said crimping tabs ( 21 ) press against a top external face of said lid and said lid is disposed within said cavity ( 17 );
wherein said lid is of a shape that complements the shape of said fluid collector ( 9 ) such that said lid includes a flat central wall ( 25 ), two lateral walls ( 27 ) extending from said flat central wall ( 25 ), and a curvatures ( 29 ) forming connections between said flat central wall ( 25 ) and said two lateral walls ( 27 ) of said lid which complements the shape of said crimping tabs ( 21 ); and
wherein said collector box ( 5 ) has a height (h) of between 10.5 mm and less than 15 mm and has a thickness (e) of between 1 and 1.2 mm.