Heat exchanger having fitting assembly

Abstract

A fitting assembly containing a fitting, a first plate and a second plate are provided. The first plate has a first plate wall and a first-plate aperture, the first-plate wall being positioned along an edge of the first plate defining the first-plate aperture. The second plate has a second-plate wall and a second-plate aperture, the second-plate wall being positioned along an edge of the second plate defining the second-plate aperture. The fitting assembly having the fitting being sandwiched between the first plate wall and the second plate wall. Also disclosed is a heat exchanger having the fitting assembly as described herein, and a method of forming the fitting assembly.

Claims

1. A heat exchanger assembly, comprising: a plurality of heat exchanger plates defining a conduit for flow of a first fluid; inlet and outlet manifolds coupled to the heat exchanger plates permitting flow of the first fluid, the inlet manifold having an inlet and the outlet manifold having an outlet that are in fluid communication with the conduit; a first plate having a first plate wall and a first-plate aperture, the first-plate wall being perpendicular to the first plate and positioned along an edge of the first plate defining the first-plate aperture; and a second plate having a second-plate wall and a second-plate aperture, the second plate being coupled to the inlet or outlet manifold, and the second-plate wall being perpendicular to the second plate and positioned along an edge of the second plate defining the second-plate aperture; the first plate wall and the second plate wall extend in the same direction from the first and second plates respectively, with the first plate contacting the second plate; a third plate adjacent to and spaced apart from the second plate, the third plate having a boss extending from the third plate towards the second plate, the boss having a flat planar surface in contact with the second plate, the boss further defining a third plate aperture that permits fluid communication from the second-plate aperture through the third plate aperture; and a tubular fitting having a channel, the fitting being sandwiched between the first plate wall and the second plate wall, and in fluid communication with the inlet or outlet, and wherein the inner surface of the fitting has a cut-out for receiving the second plate wall.

2. The heat exchanger assembly according to claim 1, wherein an edge of the flat planar surface defining the third-plate aperture aligns with the edge of the second plate defining the second-plate aperture.

3. The heat exchanger assembly according to claim 1, wherein the boss extending from the third plate has a S-shaped cross-section.

4. The heat exchanger assembly according to claim 1, wherein a diameter of the first plate aperture is larger than a diameter of the second plate aperture.

5. The heat exchanger assembly according to claim 1, wherein the first-plate wall is cylindrical and extends along the entire edge of the first plate defining the first-plate aperture.

6. The heat exchanger assembly according to claim 1, wherein the second-plate wall is cylindrical and extends along the entire edge of the second plate defining the second-plate aperture.

7. The heat exchanger assembly according to claim 1, wherein the first and second plates are clad together.

8. The heat exchanger assembly according to claim 1, wherein the fitting is brazed to the first and second plates for affixing the fitting.

9. The heat exchanger assembly according to claim 1, wherein the heat exchanger assembly is formed by a plate-type heat exchanger.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Reference will now be made, by way of example, to the accompanying drawings which show example embodiments of the present application, and in which:

(2) FIG. 1 shows one example of a cross-sectional area of a fitting assembly.

(3) FIG. 2 shows a second example of a cross-sectional area of a fitting assembly.

(4) FIG. 3 shows a third example of a cross-sectional area of a fitting assembly.

(5) FIG. 4 shows a picture of one embodiment of a heat exchanger assembly in accordance with an embodiment of the specification.

(6) FIG. 5 shows a picture of an expanded area of the heat exchanger shown in FIG. 4.

(7) FIG. 6 shows an exploded view of the fitting assembly in accordance with an embodiment of the specification.

(8) FIG. 7 shows an assembled embodiment of the fitting assembly of FIG. 6.

(9) FIG. 8 shows a cross-sectional view of a portion of the heat exchanger assembly in accordance with an embodiment of the specification.

(10) FIG. 9 shows a picture of a cross-section of a heat exchanger assembly in accordance with an embodiment of the specification.

(11) FIG. 10 shows a second picture of a cross-section of a heat exchanger assembly in accordance with an embodiment of the specification.

(12) FIG. 11 shows a third picture of a cross-section of a heat exchanger assembly in accordance with an embodiment of the specification.

(13) FIG. 12 shows a fourth picture of a cross-section of a heat exchanger assembly in accordance with an embodiment of the specification.

(14) FIG. 13 shows a cross-sectional view of a second embodiment of the fitting assembly in accordance with the specification.

(15) FIG. 14 shows a cross-sectional view of a third embodiment of the fitting assembly in accordance with the specification.

(16) Similar reference numerals may have been used in different figures to denote similar components.

DESCRIPTION

(17) The specification relates to a fitting assembly, and has been described herein with reference to a stacked plate-type heat exchanger assembly (2) as an embodiment, without being particularly limited to it.

(18) As noted above, in one aspect the specification discloses a fitting assembly, containing: a fitting; a first plate having a first plate wall and a first-plate aperture, the first-plate wall being positioned along an edge of the first plate defining the first-plate aperture; and a second plate having a second-plate wall and a second-plate aperture, the second-plate wall being positioned along an edge of the second plate defining the second-plate aperture;

(19) the fitting assembly having the fitting being sandwiched between the first plate wall and the second plate wall.

(20) In a second aspect, the specification discloses a heat exchanger assembly, containing: a plurality of heat exchanger plates defining a conduit for flow of a first fluid; inlet and outlet manifolds coupled to the heat exchanger plates permitting flow of the first fluid, the inlet manifold having an inlet and the outlet manifold having an outlet that are in fluid communication with the conduit; a first plate having a first plate wall and a first-plate aperture, the first-plate wall being positioned along an edge of the first plate defining the first-plate aperture; and a second plate having a second-plate wall and a second-plate aperture, the second plate being coupled to the inlet or outlet manifold, and the second-plate wall being positioned along an edge of the second plate defining the second-plate aperture; and a fitting, the fitting being sandwiched between the first plate wall and the second plate wall, and in fluid communication with the inlet or outlet.

(21) FIG. 4 discloses an embodiment of a stacked plate-type heat exchanger assembly (2) having a heat exchanger (4) and a fitting assembly (6). The heat exchanger (4) is made up of a plurality of plates (8) that are stacked one on top of each other and provide a conduit (46) for flow of a first fluid. Each of the plurality of plates (8) has at least two apertures that are in fluid communication with the conduit, with one of the apertures forming part of the inlet or outlet manifold (44) of the heat exchanger (4). As shown in FIGS. 4 and 5, the heat exchanger (4) is provided with a fitting assembly (6) that is also in fluid communication with either the inlet or outlet (42) of the inlet or outlet manifolds (44), respectively.

(22) The fitting assembly (6) as shown in FIGS. 6 and 7 contains a fitting (10), a first plate (12) and a second plate (14). The type of fitting (10) used is not particularly limited and can depend on the application and requirements of the individual assembly. In one embodiment, for example and without limitation, the fitting (10) is a tubular fitting having a channel, as shown in the figures. However, in other embodiments, the fitting can have other shapes, such that the cross-section of the fitting is triangular, square or hexagon.

(23) The first plate (12) as disclosed herein is not particularly limited. In one embodiment, for example and without limitation, the first plate (12) is a reinforcement plate of a heat exchanger assembly (2). The first plate (12) has a first-plate wall (16) and a first-plate aperture (18), with the first-plate wall (16) positioned along an edge of the first plate (20) that defines the first-plate aperture (18).

(24) The first-plate wall (16) present in the fitting assembly (6), as described herein, is not particularly limited. In one embodiment, for example and without limitation, the first-plate wall (16) is cylindrical as shown in FIGS. 6 and 7. However, the first-plate wall (16) can be provided as a plurality of wall sections extending from the first plate (12) along the edge of the first-plate (20) to provide support for the fitting (10). The number of wall sections is not particularly limited and can be varied depending upon the particular embodiment and needs of the fitting assembly (6), so long as it can provide support for the fitting (10). In another embodiment, an inverted U-shaped wall (FIG. 14) can be provided.

(25) The second plate (14) as disclosed herein is not particularly limited. In one embodiment, for example and without limitation, the second plate (14) is a cover plate of a heat exchanger (4). The second plate (14), similar to the first plate (12), has a second-plate wall (22) and a second-plate aperture (24), with the second-plate wall (22) positioned along an edge of the second plate (26) that defines the second-plate aperture (24). The second-plate wall (22), similar to the first-plate wall (16), in one embodiment for example and without limitation, is cylindrical as shown in the figures, while in other embodiments, it can be provided as a plurality of wall sections, so long as it can provide support for the fitting (10) and to affix the fitting between the first-plate wall (16) and the second-plate wall (22).

(26) The first and second-plate walls (16, 22) extending from the first and second-plates (12, 14) can be, in one embodiment, for example and without limitation, perpendicular to the surface of the first and second-plates (12, 14) (FIGS. 5, 6 and 8). Alternatively, in another embodiment, the first and second-plate walls (16, 22) extending from the first and second-plates (12, 14) are at an angle from the surface of the first and second-plates (12, 14) (FIGS. 10 and 11). The angle between the first-plate wall (16) and the first plate (12), or between the second-plate wall (22) and the second plate (14) is not particularly limited, so long as it can provide support and affix the fitting (10).

(27) In one embodiment, as shown in the figures, the first and second-plate walls (16, 22) extend in the same direction from the first and second-plates (12, 14). In another embodiment, for example and without limitation, the first plate wall (16) is an inverted U-shaped member (FIG. 14) such that the first-plate wall (16) extending from the first plate (12) projects in the opposite direction from the second-plate wall (22). In such an embodiment as well, the fitting (10) is still affixed between the first and second-plate walls (16, 22) due to the diameters of the first and second-plate apertures (18, 24).

(28) In the fitting assembly (6), as shown in FIG. 8, the diameter of the first-plate aperture (18) is larger than the diameter of the second-plate aperture (24). The diameters of the first-plate and second-plate apertures (18, 24) are selected to ensure that the first-plate wall (16) contacts the outer surface of the fitting (28) and the second-plate wall (22) contacts the inner surface of the fitting (30)

(29) In a further embodiment, as shown in FIGS. 9-12, the fitting (10) is provided with a cut-out (32) such that the second-plate wall (22) complements the cut-out (32), when the fitting (10) is affixed between the first and second-plate walls (16, 22). Such an embodiment can also avoid impeding or minimize the impact on the flow of the fluid flowing through the fitting (10) and into the inlet or outlet (42) of the inlet or outlet manifold (44), respectively. In another embodiment, the wall of the fitting (10) near the first and second plates (12, 14) can be expanded (FIG. 13) to provide a larger inner diameter than the remaining inner diameter of the fitting (10). This can allow the use of a fitting (10) without a cut-out (32) and also use of a fitting (10) having a reduced wall thickness.

(30) In a third aspect, the specification relates to a process for forming a fitting assembly, the fitting assembly containing a fitting; a first plate having a first plate wall and a first-plate aperture, the first-plate wall being positioned along an edge of the first plate defining the first-plate aperture; a second plate having a second-plate wall and a second-plate aperture, the second-plate wall being positioned along an edge of the second plate defining the second-plate aperture; and the fitting assembly having the fitting being sandwiched between the first plate wall and the second plate wall; the process containing the steps of: coupling the first plate with the second plate; inserting the fitting in the first-plate aperture; and swagging the second-plate for sandwiching the fitting between the first plate wall and the second plate wall.

(31) The process of coupling the first plate (12) with the second plate (14) is not particularly limited. The coupling can simply be provided by placing the first-plate (12) in contact with the second-plate (14). In one embodiment, for example and without limitation, the first plate (12) and second plate (14) are clad together. In another embodiment, for example and without limitation, the first plate (12) and second plate (14) are brazed together. Further, cladding and brazing can be carried out to couple the first plate (12) to the second plate (14). In the embodiment disclosed herein, the clad material can only be provided on one surface of the first plate (12), which faces the second plate (14).

(32) The fitting (10) is then inserted into the first-plate aperture (18); and the walls of the first-plate (16) can assist with alignment of the fitting (10) in the fitting assembly (6). Although the process has been described with the coupling between the first plate (12) and the second plate (14) taking place before insertion of the fitting (10) in the first-plate aperture (18); it should be understood that the step of coupling the first plate (12) to the second plate (14) can be performed after insertion of the fitting (10) in the first-plate aperture (18).

(33) The process then involves swaging the second-plate (14) for sandwiching the fitting (10) between the first-plate wall (16) and the second-plate wall (22). In one embodiment, for example and without limitation, the second-plate (14) has the second-plate wall (22) present prior to the swaging process, so that the swaging results in affixing the fitting (10) between the first and second-plate walls (16, 22).

(34) In another embodiment, the second-plate (14) lacks the second-plate wall (22) and the second plate (14) is provided with a hole that has a smaller diameter than the second-plate aperture (24) present in the fitting assembly. In such an embodiment, the fitting (10) upon insertion into the first-plate aperture (18) contacts and is stopped by the second plate (14). The swaging process is then performed by insertion of the swaging tool into the hole of the second plate (14), and which results in formation of the second-plate wall (22) and expansion of the diameter of the hole in the second plate (14) to form the second-plate aperture (24). In addition, the fitting (10) is then affixed between the first and second-plate walls (16, 22).

(35) One of the advantages of the above embodiment is that the diameter of the hole can be set such that the second-plate wall (22) formed is complementary to the cut-out on the inner surface of the fitting (30) and is received within the cut-out during the swaging process. This can help in tightly affixing the fitting (10) between the first and second-plate walls (16, 22) during the swaging process.

(36) After affixing the fitting (10) to the first and second plates (12, 14), brazing can be performed for brazing the fitting assembly (6) together. During the brazing step, clad material can flow from between the first and second plates (12, 14) and fill in spaces between the first-plate wall (16) and the fitting (10), and/or the spaces between the second-plate wall (22) and the fitting (10), and thereby, further affixing the fitting (10) to the fitting assembly (6).

(37) The fitting assembly (6) and the heat exchanger assembly (2) described herein can provide a self-positioning fitting (10) and can result in a fitting (10) that is more properly located. In addition, the fitting assembly (6) and the heat exchanger (2) described herein can have clad material present on only one side.

(38) Certain adaptations and modifications of the described embodiments can be made. Therefore, the above discussed embodiments are considered to be illustrative and not restrictive.

PART NUMBERS AND THEIR BRIEF DESCRIPTION

(39) TABLE-US-00001 2 heat exchanger assembly 4 heat exchanger (HX) 6 fitting assembly 8 plurality of HX plates 10 fitting 12 first plate 14 second plate 16 first-plate wall 18 first-plate aperture 20 edge of first-plate 22 second-plate wall 24 second-plate aperture 26 edge of second-plate 28 outer surface of the fitting 30 inner surface of the fitting 32 cut-out 34 36 38 40 42 inlet or outlet 44 inlet or outlet manifold 46 conduit of HX