HEAT EXCHANGER NETWORK
A heat exchanger grid includes a stack including and arranged between end plates and further includes dividing plates and spacers arranged between the end plates to form sealed chambers for at least two heat exchange media. The end plates include one or both of inlet and outlet openings for the at least two media. The dividing plates including first passages aligned with the one or both of the inlet and outlet openings. The first passages are delimited by circumferentially enclosed edges and form collecting channels for the at least two media. The spacers include frames which are delimited circumferentially by rails and which spacers include second and third passages which are aligned at least partly with respect to the one or both of the inlet and outlet openings. The first, second, and third passages are arranged as slots with a part of the second and third passages being delimited by circumferentially enclosed edges and another part of the second and third passages including pass-through gaps facing toward the sealed chambers and except for the gaps, the second and third passages are enclosed.
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This application is a claims benefit of and priority to German Patent Application No. 20 2009 015 586.2, filed Nov. 12, 2009, the content of which application is incorporated by reference herein.
BACKGROUND AND SUMMARYThe present disclosure relates to a heat exchanger grid. The grid includes a stack of end plates and dividing plates, and spacers arranged between them for forming mutually sealed chambers for at least two heat exchange media.
Heat exchanger grids are frequently built in plate design, for example, see DE 20 2004 011 489 U1, in that a stack is formed from plates and spacers which keep them apart and are provided in form of individual sections or rails. The stack comprises chambers which are sealed against each other and through which at least two heat-exchanging media flow, especially fluid ones. The various components of the stack are connected by soldering, for example, and are sealed against each other. The finished grid is then fastened by welding to collecting chambers which are used for feeding or discharging the media. Such a configuration requires much mounting work due to the numerous different components and leads to comparatively high material costs and requires more space due to the additional attachment of the collecting chambers.
In order to avoid these disadvantages, heat exchanger grids are known which are provided in the manner of shell coolers with integrated collecting chambers, for example, see DE 196 28 561 D1 and DE 202 10 209 U1. The integrated collecting chambers are formed by passages which are disposed in the plates and are aligned with respect to each other and which are in flow connection only with associated chambers determined for receiving one of the media. The sealing of the chambers and the passages occurs in this case by annular or disk-like spacers which are arranged between the plates and act simultaneously as a sealing means. Heat exchanger grids of this kind also consist of numerous individual parts and are also problematic with respect to their positional stability unless additional or specially designed turbulator inserts or the like are provided between the plates.
Finally, a heat exchanger grid of the kind described above is known, for example, see DE 10 2007 021 708 A1, whose stack of plates is formed in an alternating fashion of punched dividing plates and spacers which are arranged between the same, act as a sealing means and are also punched, and consist of integral frames which each delimit one chamber determined for the one or other medium. The frames for the one medium, for example, cooling water, are also provided with inwardly protruding rails, for example, protruding into the chambers, in order to thus forcibly deflect the respective medium several times while flowing through said chambers. Passages arranged in the dividing plates are used as collecting chambers for these media, as in the other heat exchanger grids which are produced in an analogous fashion to the shell configuration. Whereas, for the second medium, for example, the intake air of a motor vehicle engine, there are no collecting chambers or only such that are usually required. The material costs and the labor in the assembly of the stack are comparatively low in this case because only a plurality of plates needs to be placed on top of one another and then needs to be connected with each other by soldering or the like.
Although the heat exchanger grids, as described above, and similar ones ensure a consistently good heat exchange, they still always cause problems in their application. That is so, when for actually identical exchanger grids, different demands are placed on the position of the inlet and/or discharge openings through which the media are to be supplied to or removed from the heat exchanger grid as a result of special installation situations in different types of motor vehicles or the like. As a result of the frequently limited available space, heat exchanger grids are required, in such cases whose inlet and discharge openings are adjusted individually, to the respective application. For this purpose, at least the end plates and dividing plates need to be provided with individually provided passages. This requires the provision of different tools for the production of the end plates and dividing plates, which is why the advantages of the heat exchanger grids provided with integrated collecting chambers are offset by undesirable disadvantages in production.
On the basis of this state of the art and the technical problems mentioned, the present disclosure arranges the heat exchanger grid, of the kind as mentioned above, in such a way that although it is composed of a few different components it can be provided with inlet and/or discharge openings whose position can be changed in a simple manner according to the respective requirements. Moreover, the heat exchanger grid of the present disclosure is configured to be set up with small changes for the heat exchange between two, three or more media.
The heat exchanger grid according to the present disclosure includes a stack including and arranged between end plates and further including dividing plates and spacers arranged between the end plates to form sealed chambers for at least two heat exchange media. The end plates include one or both of inlet and outlet openings for the at least two media. The dividing plates include first passages aligned with the one or both of the inlet and outlet openings, the first passages being delimited by circumferentially enclosed edges and form collecting channels for the at least two media. The spacers include frames which are delimited circumferentially by rails and which spacers include second and third passages which are aligned at least partly with respect to the one or both of the inlet and outlet openings. The first, second, and third passages are arranged as slots with a part of the second and third passages being delimited by circumferentially enclosed edges and another part of the second and third passages including pass-through gaps facing toward the sealed chambers and except for the gaps, the second and third passages are enclosed.
The present disclosure provides, on the one hand, that spacers are provided between the dividing plates which includes integral frames delimited circumferentially by rails, and, on the other hand, that the dividing plates and the rails are provided with slotted passages which either form enclosed collecting chambers for the various media or are opened towards chambers to be flowed through by the media and formed between the dividing plates in order to enable the inflow of the media into the chambers and discharge of the media from the chambers. The slotted passages allow providing the end plates with inlet and/or discharge openings, the positions of which can be changed within the boundaries of the respective lengths of the slits. That is why the stack of dividing plates and spacers can be combined with numerous different arrangements of inlet and/or discharge openings. Moreover, heat exchanger grids for more than two media can, in accordance with the present disclosure, thus be created in a simple manner in such a way that the spacers and frames can be subdivided into two or more chambers by dividing rails.
Additional advantageous features, in accordance with the present disclosure, are disclosed therein.
In accordance with an embodiment of the present disclosure, the spacers are arranged in several parts made of two mutually spaced end pieces and at least two rails which connect the end pieces with each other. As a result of the multipart arrangement, the cuttings and thus also the material consumption in punching out the spacers can be reduced substantially. Moreover, the lengths of the rails can be adjusted as required in a simple manner without having to produce a separate tool for each further length of a spacer. The required pressing forces for punching out the individual parts are substantially lower as compared with an integral embodiment. Moreover, there is less warping in punching out the individual parts, especially in the region of the radii of the end pieces.
In accordance with a further embodiment of the present disclosure, the end pieces and the rails are arranged to be engaged with each other in an interlocking manner in at least one direction.
Other aspects of the present disclosure will become apparent from the following descriptions when considered in conjunction with the accompanying drawings.
The end plates 5 and/or 6 are provided with inlet and/or discharge openings 12a to 12d, as shown in
The dividing plates 2 comprise first passages 16 in opposite boundary regions which are parallel to the longitudinal axes 9 and are adjacent to the side edges 15, with the number of the passages thereof depending on the number of the media flowing through the heat exchanger grid. Two such first passages 16 are provided in the embodiment in each boundary region. All first passages 16 are delimited by edges 17 which are enclosed circumferentially.
Spacers 3 are arranged between two dividing plates 2 and each includes, as shown in
Whereas the rails 19 are comparatively narrow, the rails 18 have a larger width. Furthermore, two passages 20 and 21 are arranged in these rails 18, with one second passage 20 and 21 each being provided in each rail 18, in analogy to the dividing plates 2. Two mutually opposite second passages, for example, passages 20, are each delimited by circumferentially enclosed edges 22. Conversely, the two other second passages, for example, passages 21, are delimited by edges 23, which are also substantially enclosed circumferentially but are provided with pass-through gaps 24 which lead to the interior spaces of the frames or chambers 25, which are enclosed, on the one hand, by the rails 18, 19 of the frames and are delimited, on the other hand, upwardly and downwardly by dividing or end plates 2, 5 or 6 which are adjacent in the stack 1. In other words, the pass-through gaps 24 each represent openings which produce a flow connection between the second passages 21 and the chambers 25 which are flowed through by a first medium, for example, the cooling water of a motor vehicle.
The spacers 4 of a second kind are arranged in a substantially analogous manner in relation to the spacers 3 and include integral frames formed by the rails 26, 27. Two third passages 28 and 29 are each formed in the comparatively wide rails 26, with two mutually opposite third passages, for example, passages 28, being delimited by circumferentially enclosed edges 30. Conversely, the two other passages, for example, passages 29, are delimited by edges 31 which are also substantially enclosed circumferentially but are provided with pass-through gaps 32 which lead to the insides of the frames or chambers 33, which are enclosed, on one hand, by the rails 26, 27 of the frames and are delimited, on the other hand, upwardly and downwardly by dividing or end plates 2, 5 or 6 which are adjacent in the stack 1. The pass-through gaps 32 thus provide flow connections between the second passages 29 and the chambers 33 which are flowed through by a second medium, for example, motor oil of a motor vehicle. Apart from that, all slotted passages 16, 20, 21, 28 and 29 may comprise longitudinal axes which are arranged parallel to the longitudinal axes 10 and 11 of spacers 3, 4 and, in the finished stack 1, are also parallel to the longitudinal axes 7 to 9 of the dividing plates 2 and the end plates 5, 6.
As is further shown in
The formation of the stack may occur, as shown in
In a finished heat exchanger grid, both the slotted second passages 20 and 21 and the slotted third passages 28 and 29 are aligned in a flush and coaxial manner with the slotted first passages 16. As a result, and as shown in
In order to increase the mechanical stiffness of the spacers 3 and 4 and thus the entire heat exchanger grid, at least some of the circumferentially enclosed second passages 20 and 28 may be subdivided by connecting webs into two halves, which connecting webs extend transversely to the longitudinal axes 10 and 11 and act as a tie rod. This is shown in
Whereas the heat exchanger grid according to
Furthermore, two types of frame-like spacers 3a and 4a are provided.
The first kind of spacers 3a corresponds substantially to the spacers 3, but with the difference that two passages 20a each are present in rails 18a which extend parallel to the longitudinal axis 10a. The passages 20a are delimited by circumferentially enclosed edges 22a, and one second passage 21a is present, which is provided with a pass-through gap 24a and is thus open towards the chamber 25a enclosed by the frame. The two passages 21a may be disposed diagonally opposite of one another, as is shown in
A second kind of frame-like spacers 4a is provided in rails 26a which are parallel to the longitudinal axis 11a with a third passage 28a which is delimited circumferentially by enclosed edges 30a and with two passages 29a1 and 29a2, which each comprise a pass-through gap 32a1 and 32a2 which is opened towards the inside of the frame. The pass-through gap 32a1 leads into a first chamber 33a1, whereas the pass-through gap 32a2 leads into a second chamber 33a2. The two chambers 33a1, 33a2 are separated from one another in a liquid-tight manner by a dividing rail 36 which extends between the rails 26a, as is shown in
The assembly of the components, according to
In the finished heat exchanger grid, the second and third passages 20a, 21a, 28a, 29a1 and 29a2 may be aligned in a flush manner and co-axially to the first passages 16a. In this way, the passages 20a, 29a1, with associated passages 16a, each form a respective collecting chamber for a first medium. The passages 29a2 with further passages 20a and associated passages 16a form a respective collecting chamber for a second medium. The passages 21a with associated passages 28a and 16a form a respective collecting chamber for the third medium. In analogy to
At least selected second passages 20a are appropriately provided with connecting webs 34 (see
The described construction of the heat exchanger grid, in accordance with the present disclosure, allows for numerous further configurations.
Analogously, the second kind of spacers 4b could be provided with more than three chambers for more than three different media. For example, the spacers 4a, 4b can be provided with at least two or more chambers, as required.
The mounting of the described parts occurs, in analogy to
It is advantageous, according to the present disclosure, that the inlet and discharge openings 12 can be provided at entirely different locations of the end plates 5 and 6 as a result of the slotted passages 16, 20, 21, 28 and 29 within the limits which are given by the respective length of the slot. Moreover, the inlet and discharge openings 12 and the connecting elements 14 can be provided optionally on the upper and/or bottom end plate 5 and 6. This is shown in
In the embodiment according to
In order to facilitate the mounting of the finished heat exchanger grids in a motor vehicle or the like, the dividing wall and end plates 2, 5 and 6 and the rails 28, 26 of the spacers 3, 4 may be provided with mounting holes 41, for example, 1-7, which in the stack 1 form a continuous channel for receiving a fastening screw or the like. The mounting holes 41 are appropriately arranged as elongated holes.
It is further appropriate, in order to improve the heat exchange performance, to provide the chambers 25 and 33, as shown, for example, in
It is provided, for further easing the mounting when packing the stack 1, 1a and 1b, that each dividing and end plate 2, 5 and 6 and each spacer 3, 4 is provided with at least one specially formed outside corner which has a different contour than the other outside corners, as is indicated, for example, in
The spacers 3c and 3d include two mutually spaced end pieces 31c, 31d and at least two rails 33c, 34c, 35c, 33d, 34d which connect the end pieces 31c, 31d with each other. The end pieces comprise their respective passages 36c, 37c and 36d, 37d which correspond to the above spacers. The end pieces 31c, 31d and the rails 33c, 34c, 33d, 34d may be arranged to engage in an interlocking manner into each other in at least one direction. As shown in
The end plates 5c and the dividing plates 2c, 2d comprise passages corresponding to the passages 36c, 37c and 36d, 37d. The turbulator inserts 42c are provided with longitudinal slits which accommodate the middle rail 34c.
The described embodiments, in accordance with the present disclosure, may be modified in numerous ways. For example, the chambers 33a1, 33a2 and 33b1 to 33b3 which are shown in
Although the present disclosure has been described and illustrated in detail, it is to be clearly understood that this is done by way of illustration and example only and is not to be taken by way of limitation. The scope of the present disclosure is to be limited only by the terms of the appended claims.
Claims
1. A heat exchanger grid comprising:
- a stack including and arranged between end plates and further including dividing plates and spacers arranged between the end plates to form sealed chambers for at least two heat exchange media;
- the end plates including one or both of inlet and outlet openings for the at least two media;
- the dividing plates including first passages aligned with the one or both of the inlet and outlet openings, the first passages being delimited by circumferentially enclosed edges and form collecting channels for the at least two media;
- the spacers including frames which are delimited circumferentially by rails and which spacers include second and third passages which are aligned at least partly with respect to the one or both of the inlet and outlet openings; and
- the first, second, and third passages being arranged as slots with a part of the second and third passages being delimited by circumferentially enclosed edges and another part of the second and third passages including pass-through gaps facing toward the sealed chambers and except for the gaps, the second and third passages are enclosed.
2-21. (canceled)
22. The heat exchanger grid according to claim 1, wherein the end plates include two inlet openings and two outlet openings each, and the dividing plates and the spacers each include four first, second and third passages.
23. The heat exchanger grid according to claim 22, wherein the dividing plates include a square or rectangular outside contour and include first longitudinal axes which are arranged parallel with respect to each other, and the first passages are arranged in boundary regions of the dividing plates which are adjacent to side edges of the dividing plates which are parallel to the first longitudinal axes.
24. The heat exchanger grid according to claim 23, wherein the spacers include frames having square or rectangular outside contours and second longitudinal axes, and the second and third passages are arranged in rails of the frames which are arranged parallel to the second longitudinal axes.
25. The heat exchanger grid according to claim 24, wherein the first, second and third passages are arranged successively behind one another in the direction of the first and second longitudinal axes.
26. The heat exchanger grid according claim 25, wherein the first, second and third passages have passage longitudinal axes which are arranged substantially parallel to the first and second longitudinal axes, respectively, of the dividing plates and the spacers.
27. The heat exchanger grid according to claim 25, wherein the first, second and third passages have lengths which are slightly smaller than a length of an end of the dividing plates divided by the number of the at least two heat exchanging media.
28. The heat exchanger grid according to claim 1, wherein at least one or both of the first and second passages are penetrated by connecting webs configured as tie rods.
29. The heat exchanger grid according to claim 24, wherein the spacers are arranged to form at least one of the sealed chambers for two different media, and are arranged in the stack in a position twisted with respect to one another by 180° about the second longitudinal axis.
30. The heat exchanger grid according to claim 1, wherein two types of spacers are provided, a first type being arranged to form one of the sealed chambers for a first medium and a second type arranged to form at least two of the sealed chambers for at least two media.
31. The heat exchanger grid according to claim 30, wherein the second type of spacers include at least three third passages each in opposite rails, and that the at least two sealed chambers are separated from one another by dividing rails arranged between selected third passages.
32. The heat exchanger grid according to claim 1, wherein the spacers are made integrally from a sheet metal.
33. The heat exchanger grid according to claim 32, wherein the spacers are produced by punching, lasing or jet cutting.
34. The heat exchanger grid according to claim 1, wherein the spacers are arranged in several parts.
35. The heat exchanger grid according to claim 34, wherein the spacers are made of two mutually spaced end pieces and at least two rails which connect the end pieces with one another.
36. The heat exchanger grid according to claim 35, wherein the end pieces and the rails are arranged to engage into each other in an interlocking manner in at least one direction.
37. The heat exchanger grid according to claim 1, wherein the end plates, the dividing plates and the spacers are connected with one another in a liquid-tight manner by soldering.
38. The heat exchanger grid according to claim 37, wherein the dividing plates are clad-brazed on both sides.
39. The heat exchanger grid according to claim 1, wherein the sealed chambers include turbulator inserts.
40. The heat exchanger grid according to claim 1, wherein the end plates, the dividing plates and the spacers include mounting holes which are aligned respect to one another in the stack.
41. The heat exchanger grid according to claim 40, wherein one or more of the end plates, the dividing plates, and the spacers include outside corners configured for mounting in the stack and include a contour which deviates from a contour of outer edges of one or more of the end plates, the dividing plates, and the spacers.
Type: Application
Filed: Nov 11, 2010
Publication Date: May 26, 2011
Applicant: AUTOKUHLER GMBH & CO. KG (Hofgeismar)
Inventor: Hans-Jürgen PALM (Vellmar)
Application Number: 12/944,109
International Classification: F28F 13/12 (20060101); F28D 7/00 (20060101);