초록 ▼

A heat exchanger including an array of tubes (10) mounted between two fluid boxes (28, 46) via respective manifolds (16) and designed to have a fluid run through. The tubes (10) include at least two channels separated by at least one longitudinal partition (78) and are arranged in a single row, para

A heat exchanger including an array of tubes (10) mounted between two fluid boxes (28, 46) via respective manifolds (16) and designed to have a fluid run through. The tubes (10) include at least two channels separated by at least one longitudinal partition (78) and are arranged in a single row, parallel to the two large surfaces of the exchanger, such that the fluid circulation occurs in at least two layers parallel to the large surfaces of the exchanger and each formed by part of the tube channels. At least one of the fluid boxes (28, 46) includes an internal longitudinal partition (48, 68) dividing the fluid box into at least two longitudinal sections communicating with the two layers respectively. The invention is in particular applicable to air conditioning evaporators.

대표청구항 ▼

1. A heat exchanger in the form of an evaporator comprising a bank of tubes ( 10) mounted between two fluid chamber covers (28,46) by means of respective manifolds secure to the tubes (10) and suitable for being traversed by a fluid, wherein the tubes (10) each include at least two channels (12) sep

1. A heat exchanger in the form of an evaporator comprising a bank of tubes ( 10) mounted between two fluid chamber covers (28,46) by means of respective manifolds secure to the tubes (10) and suitable for being traversed by a fluid, wherein the tubes (10) each include at least two channels (12) separated by at least one longitudinal partition (68) and are arranged along a single row, parallel to two large faces (F1, F2) of the exchanger, wherein the circulation of the fluid takes place in at least two layers (SN1, SN2; SN3, SN4) parallel to the large faces of the exchanger and each formed by a part (G1; G2) of the channels (12) of the tubes, and wherein at least one of the fluid chamber covers (28,46) comprises an internal longitudinal partition (48,68) suitable for dividing a manifold chamber into at least two longitudinal compartments communicating respectively with the two layers, wherein said internal longitudinal partition is homogenously formed with said at least one of the fluid chamber covers, wherein each manifold ( 16) further comprises apertures (18) surrounded by collars (20) for the insertion of the extremities (14) of the tubes (10) of the bank, a manifold plate (22) is affixed by brazing to said manifold E—has been inserted and is equipped with a flat surface (22,24) for brazing of at least one of said fluid chamber covers (28,46) said manifold plate including apertures (26) aligned with the apertures (18) of the manifold.2. The heat exchanger as claimed in claim 1, wherein at least one (28) of the fluid covers comprises at least one transverse partition (52) suitable for dividing the fluid chamber cover into at least two transverse compartments (58,60;64) at least one of which establishes a communication between two layers.3. The heat exchanger as claimed in claim 1, wherein each layer is divided into at least two sub-layers (SN1, SN2, SN3, SN4) linked in series in which the circulation of the fluid takes place in counter-current mode from one sub-layer to the next one.4. The heat exchanger as claimed in claim 1, wherein each fluid chamber cover (28,46) comprises a flat contour (30,66) and at least one co-planar partition (48,52;68) suitable for being brazed against the flat surface (24) of the manifold (16).5. The heat exchanger as claimed in claim 1, which comprises at least one lug (45) originating from one edge of the manifold (16) or from the manifold plate (22), or from at least one of the fluid chamber covers (28;46), the said lug being folded over respectively onto one edge of the fluid chamber cover (28;46), or onto one edge of the manifold (16) or of the manifold plate (22).6. The heat exchanger as claimed in claim 1, wherein the extremity (14) of at least one longitudinal partition (78) of the tube (10) is positioned substantially at the level of the flat surface (22,24), in such a way that this longitudinal partition (78) of the tube can be brazed onto an internal longitudinal partition (48,68) of the fluid chamber cover.7. The heat exchanger as claimed in claim 4, wherein the fluid chamber covers (28,46) are each formed by stamping of a metal plate in order to define the flat contour (30,66) and the co-planar partition(s).8. The heat exchanger as claimed in claim 6, wherein at least one of the fluid chamber covers (28,46) comprises at least one inlet or outlet pipe (54,56) for fluid.9. The heat exchanger as claimed in claim 1, wherein each tube (10) is an extruded tube.10. The heat exchanger as claimed in claim 1, wherein each tube (10) is formed from a piece of sheet metal (80) folded and closed by longitudinal brazed joints (88).11. The heat exchanger as claimed in claim 1, wherein each tube (10) is formed from two stamped sheet metal plates (90) which are brazed together so as to be leaktight.12. The heat exchanger as claimed in claim 1, wherein the channels (12) of the tubes (10) are separated by partitions (78) having respective thicknesses (A, B, C, D, E) which decrease from a centra l region of the tube towards the periphery.13. The heat exchanger as claimed in claim 1, which is produced in the form of an evaporator for an air-conditioning apparatus.