EP2601474A2

EP2601474A2 - Plate-shaped heat exchanger for a cooling device comprising at least one heat exchanger package

Info

Publication number: EP2601474A2
Application number: EP11741208.0A
Authority: EP
Inventors: Boris Kerler; Steffen GRÖZINGER; Mehmet Tosun; Christian Schnepf; Florian Schmidt; Hans-Joachim Krauss; Vinko Lukcin; Stéphanie LARPENT
Original assignee: Behr GmbH and Co KG; Mahle Behr GmbH and Co KG
Current assignee: Mahle International GmbH; Mahle Behr GmbH and Co KG
Priority date: 2010-08-05
Filing date: 2011-08-04
Publication date: 2013-06-12
Also published as: US9638476B2; DE102010038945A1; US20130264038A1; CN203550720U; WO2012017044A2; KR20130096264A; WO2012017044A3

Abstract

The invention relates to a plate-shaped heat exchanger for a cooling device comprising at least one heat exchanger package, in particular for a motor vehicle, consisting of a plurality of openings (7) for accommodating a pipe conducting a coolant, wherein each opening (7) is surrounded by an passage (4) and a plurality of projections (10, 11, 15, 16) are distributed between the passages (4) for the heat exchange with the medium to be cooled. In order to allow a high performance increase of a cooling device, yet a low increase in pressure loss of the charge air, a plurality of projections (10, 11, 15, 16) are arranged around an passage (4), wherein the projections (10, 11, 15, 16) have a shape that assures deliberate heat conduction from the projections (10, 11, 15, 16) to the passage (4).

Description

Plate-shaped heat exchanger for a, at least one heat exchanger package having cooling device

The invention relates to a plate-shaped heat exchanger for a, at least one heat exchanger package having cooling device, in particular for a motor vehicle consisting of a plurality of openings for receiving a, a coolant-carrying tube, each opening is surrounded by a passage and between the passages several exhibitions to Heat exchange are distributed with the medium to be cooled.

There are known intercooler in round tube design, which are shown in Figure 1 are provided. In this case, there is such a charge air cooler from a package of plate-shaped heat exchangers 2, which are also referred to as corrugated fins. Each plate-shaped heat exchanger 2 in this case has a plurality of openings 7, in each of which a round tube 3 is fitted and is connected to the plate-shaped heat exchanger 2 via a mechanical widening of the passages 4 surrounding the opening. Through the round re 3 flows a coolant 5, while coming from a not shown internal combustion engine, to be cooled charge air 6 flows perpendicular to the round tubes 3 in the, consisting of many plate-shaped heat exchangers 2 heat exchanger package, which is perpendicular to the Rundroh- 3.

A single plate-shaped heat exchanger 2 is shown in Figure 2 wherein the passages 4 enclosing the openings 7 are arranged in a plurality of rows (Figure 2a). FIG. 2b shows a cross section through the plate-shaped heat exchanger 2, while FIG. 2c shows a perspective view of a passage 4. The passages 4 ensure contact with the round tubes 3, which derive the heat from the charge air cooler 1 via the coolant 5. Between the passages 4 Turbuiatoren or spacers 8 are arranged, see symmetrically between the see, the openings 7 enclosing passages 4 are distributed. The turbulators or spacers 8 receive the plate-shaped heat exchanger 2 arranged above them, wherein there is sufficient space between the two plate-shaped heat exchangers 2 so that the charge air 6 coming from the internal combustion engine can flow between these heat exchangers 2. The turbulators or spacers 8 can also cause a transformation of the laminar flow of the Ladeiuft 6 in a turbulent flow, so that the heat distribution over the entire plate-shaped heat exchanger 2 can be better ensured.

FIG. 3 shows a further known embodiment of a plate-shaped heat exchanger 2, in which a gill field 9 is arranged between the passages 4. This gill field 9 has the task of causing turbulence in the air flow of the charge air 6 and to ensure an improved transverse noise of the charge air 6 between the individual, superimposed plate-shaped heat exchangers 2. To- In addition to the gill box 9 turbulators or spacers 8 are provided, which serve as a support for the next, plate-shaped heat exchanger 2. In a known embodiment of Figure 4, the passage 4 so-called crowns 4 a, which are arranged at the passage 4 at its periphery spaced around. This Krontulpen 4a serve as a spacer for the plate-lying heat exchanger lying on it 2, which is why it is possible to dispense with separate Abstandhaiter 8. Here, too, each passage 4 and the opening 4 surrounded by the passage 4 is surrounded by a gill feeder 9.

Due to the often inhomogeneous flow of the charge air 6 to the intercooler 1 with high charge air mass flows, the plate-shaped heat exchanger 2 must have a high mechanical stability to vibration and vibration during operation in order to avoid fractures of the heat exchanger 2.

The invention is therefore based on the object anzzügeben a plate-shaped heat exchanger, which allows a high heat transfer from the charge air to the coolant, wherein the pressure drop of the charge air is to be kept as low as possible.

Effindungsgemäß the object is achieved in that several exhibitions are arranged around a passage, the Aussteilungen have a shape which ensure a targeted heat conduction from the exhibitions on the passage. Such a form of the exhibition ensures that although the turbulence required for the heat exchange through the exhibitions on the plate-shaped heat exchanger are generated and the turbulent air mass is fed to the passage, but only a slight increase in pressure loss of the charge air occurs. Advantageously, the stiffeners are arranged approximately circularly around the passage. Such a circular arrangement ensures that the turbulent air, which is caused by the exhibitions, directly to the passage and thus when installed in a cooling device is fed to the surrounding of the passage round tube. This improves the heat exchange of Kühlei device,

In one embodiment, the exhibition is kreissegmentähntich trained. This circular segment-like form of the exhibition supports the new approaches of the flow of the charge air to generate turbulence and ensures a cross-exchange between the various plate-like heat exchangers

In one variant, the width and / or the length and / or the height of the circular segment-like exhibition and / or the distance between two adjacent circular segment-like exhibitions and / or the distance of the circular segment-like exhibition depends on a passage of the heat to be achieved by the circular segment-like exhibition the passage. Thus, the design of the plate-shaped heat exchanger can always be adapted concretely to the desired performance requirements of the cooling device.

In a further development, the circular segment-like distributions are arranged in two or more rows around the passage. Thus, the air flow is amplified in the direction of the passage, which also improves the heat conduction.

Advantageously, the exhibitions are radstrahlenähniich arranged around the passage. This has the advantage that flow recirculation of the charge air to generate turbulence very well, at the same time a short direct path for the heat conduction to the passages and thus to the round tubes of the cooling device is present.

In one embodiment, the pointing in the direction of the passage ends of the beam-like exhibitions are arranged approximately circularly around the passage, along the longitudinal extension of at least one radiation-like exhibition, a first material overhang runs, which releases the air exchange in the direction of passage and in particular the width of the strahtenähnfichen exhibition and / or the height of the radiation-like exhibition and / or the depth of the radiation-like exhibition depends on the heat conduction to be achieved by the radiation-like exhibition on the passage. Through the Materiaiüberhänge the air currents are channeled, and improves the cross-exchange between the overlying plate-shaped heat exchangers. This cross-exchange leads to a more homogeneous flow through the charge air. Due to the design of Materiaiüberhänge the targeted heat conduction is realized on the passage in a structurally simple manner. In a further development, the radiation-like exhibitions are subdivided into at least two groups, which are arranged around the passage such that each group is positioned at a distance from a line extending approximately centrally through the passage and perpendicular to an edge of the heat exchanger. Since the heat exchanger is designed as a band-shaped stamped sheet metal part, it is necessary to separate it into the desired size of the individual plate-shaped heat exchangers. So that the structure of the heat exchanger is not disturbed by the singulation process, the invention advantageously provides for the distance between these groups. In a further variant, the passage at a distance from the surface of the heat exchanger has a second material overhang for receiving an overlying heat exchanger. Thus, the passage itself serves as a spacer to the overlying heat exchanger. Additional spacers can therefore be dispensed with. This simplifies the process of making the heat exchanger.

Advantageously, to increase the strength of the edge region of the heat exchanger, the edge region has a corrugation and / or at least one bead and / or at least one turbulator and / or at least one spacer are arranged in the edge region and / or the width of the edge region is up to one reduced first row of passages. By means of these measures, which can be carried out independently or in combination, the strength of the edge region of the plate-shaped heat exchanger is mechanically stabilized, whereby cracks in this region are reliably avoided,

The invention is susceptible to numerous embodiments. Some of these will be explained in more detail with reference to the figures shown in the drawing.

It shows:

1: intercooler according to the prior art, Figure 2: a first plate-shaped heat exchanger according to the prior

Technology,

Figure 3: a second plate-shaped heat exchanger according to the prior

Technology, 4 shows a third plate-shaped heat exchanger according to the prior art,

Figure 5; a plate-shaped heat exchanger with circular segment-like

exhibitions

FIG. 6: a plate-shaped heat exchanger with radiation-like displays,

FIG. 7 shows a cross section through an exhibition made as a gill,

FIG. 8 shows a plate-shaped heat exchanger with gills made as gills

stiffeners

FIG. 9 is a plan view of a plate-shaped heat exchanger with radiation-like gills in the form of gills;

FIG. 10: a second plate-shaped heat exchanger with radiation-like gills designed as gills,

FIG. 11: edge region of the plate-shaped heat exchanger,

Identical features are identified by the same reference numerals.

Figure 5 shows a section of a plate-shaped heat exchanger 2 with circular segment-like exhibitions 10, which surround the opening 7. The circle-segment-like exhibitions 10 thereby form a circle around the opening 7. As can be seen from the various FIGS. 5a, 5b and 5c, the dimensions of the circular segment-like exhibitions 10 can be chosen very differently. Figure 5a discloses circular segment-like exhibitions 10, where each circular segment-like Exhibition 10 approximately covers an angle of 90 °. FIG. 5c shows circular segment-like partitions 10, which are considerably shorter than the circular segment-like exhibitions according to FIGS. 5a and 5b. As shown in Figure 5b, the circular segment-like exhibitions 10 can also be arranged in several rows around the opening 7. Each circular segment-like exhibition 10 represents an expression which is arranged around the opening 7, wherein each opening 7 is surrounded by a circular passage 4. By through the plate-shaped heat exchanger 2, which are stacked over each other and form a package, performed charge air 6, which originates from an internal combustion engine, the heat contained in the charge air 6 is delivered to the kreissegmentähniichen exhibitions 10. The circular segment-like exhibitions TO serve not only as a heat exchanger but also at the same time as a turbulence generator, wherein the laminar air flow of the charge air 6 is converted into a turbulent air flow. This conversion has the advantage that a good supply of heat to all kreissegmentähniichen exhibitions 10 takes place. The circular arrangement of the kreissegmentähniichen exhibitions 10 to the passage 4 and thus the opening 7 is a restart of the flow of the charge air 6 for generating the turbulence at each kreissegmentähniichen exhibition 10, which improves the heat transfer from the kreissegmentähniichen exhibition 10 to the opening 7. Due to the shape of the circular segment-like exhibitions 10, their area is enlarged, which results in increased heat absorption from the charge air 6. Since the kreissegmentähniichen exhibitions 10 not shown openings, for example in the form of slots, a cross-exchange of the charge air 6 between the various plate-shaped heat exchangers 2, which are arranged above each other, guaranteed. As a result, despite inhomogeneous flow, the plate-shaped heat exchanger 2 in the direction of cooling improves heat exchange Charge air and coolant, which flows through circular pipes, not shown, which are inserted into the openings 7, realized.

Instead of the circular segment-like exhibitions 10, other forms, for example in the form of ellipses, around the passages 4 are possible.

FIG. 6 shows a plate-shaped heat exchanger 2 which has radiation-like displays 11. As can be seen from FIGS. 6a to 6c, these radiation-like displays 11 are also arranged in a circle around the passage 4 and thus around the opening 7. The radiation-similar exhibitions 11 are elongated, the narrow ends 12 of the radiation-like exhibition 11 are arranged opposite the passage 4 and are guided directly to the passage 4. The radiation-like exhibitions 11 have slots in their longitudinal direction, material overhangs 13 protruding from the radial displays 11. In Figure 5b, the radiation-like exhibitions are designed as so-called gills 15. The number of exhibitions 11 in Figure 6a and the gills 15 in Figure 5b is different depending on the size of the strahienähnlichen exhibitions 11 and the gills 15th

In FIG. 6c, the radiation-like displays 16 are not straight as in FIG. 6a, but have a slight curvature. The radiation-like exhibitions 11, 15 and 16 serve as heat exchangers, by absorbing the heat supplied by the charge air 6 and transporting in the direction of the passage 4, whereby the round tube (not shown) flows through the passage 4 with the coolant. These exhibitions 11, 15 and 16 arranged in the manner of a beam have the particular advantage that the heat conduction directly to the opening 7 and thus the Round tube is directed, with no interruptions in the heat conduction is provided by intermediate structural components.

FIG. 7 shows a cross section through a gill 15, as it has been worked out of the plate-shaped heat exchanger 2. In this case, the gill 15 projects beyond the upper side of the plate-shaped heat exchanger 2 with its first material overhang 13, while the second material overhang 14 of the gill 15 is directed in the direction below the plate-shaped heat exchanger 2. Due to this simple design, a very good transverse exchange of the charge air between the various plate-shaped heat exchangers 2 is possible.

As can be seen from FIG. 8, these straightening-like stiffeners in the form of gills 15 can be structurally varied in their design. This concerns the width (arrow A in FIG. 8 a) as well as the depth (arrow B in FIG. 8 b) and also the height. which is indicated by the arrow C in Figure 8c. These variations improve the flow conditions at the wire-like displays 11, 15 and 16, resulting in better heat conduction and thus improved cooling equipment performance. The angle of the gills 15 also contributes to better heat transfer. The Wärmeieitung is guaranteed all the better, the greater the number of exhibitions 11, 16 and the gills 15 per passage 4. FIG. 9 a shows a detail of a plan view of a plate-shaped heat exchanger 2, which has openings 7 arranged in rows, wherein each opening 7 is surrounded by a passage 4. While the centrally arranged passages 4 are completely surrounded with radiation-like exhibitions 11, in the edge region 17, the passages 4 are provided only approximately halfway with the radiation-like exhibitions 11, in the edge region 17 are located between the passages 4 on the Radar-like exhibitions 11 opposite side spacers 8. These spacers 8 have the task of stabilizing the edge region 17 against mechanical stresses. FIG. 9b again shows a section around an opening 7 with a passage 4, which are surrounded by the radiation-like exhibitions 11; The radiation-like exhibitions 11 are all arranged at the same distance on a circle around the opening 7.

FIG. 10 shows a second illustration of a plate-shaped heat exchanger 2, in which, as can be seen in FIG. 10b, the radiation-like displays 11 are divided into two groups 18a, 18b. In each group 18a, 18b, the radiation-like exhibitions 11 have a similar distance below each other, wherein the distance AB of the two groups 18a, 18b is greater than the distance of the radiation-like exhibitions 11 within a group 18a, 18b. As can be seen from FIG. 10a, a gap 19 thus extends between the groups 18a, 18b, which gap is used for cutting the plate-shaped heat exchanger 2 out of a strip, the structure of the plate-shaped heat exchanger 2 remaining unaffected during the cutting process.

In the variants explained in connection with FIGS. 9 and 10, a performance increase of the heat transfer of approximately 10% is ensured with a pressure increase of approximately <50% of the charge air 6. Thus, the growing power deliveries in cooling devices are guaranteed.

FIGS. 11a to 11d show various measures for increasing the strength of the edge region 17 of the plate-shaped heat exchangers 2. Due to the charge air 6 supplied heat resulting in the edge region of the plate-shaped heat exchanger 2 vibrations, which lead to cracks and consequently to instabilities of the edge region 17 can. Such instabilities can be prevented if, as shown in Figure 11a, the edge region is reduced to the first row of passages 4 (arrow F). A second measure for improving the stability of the edge region 17 is that near the edge region 17 between two adjacent passages 4, a bead 20 is introduced {Figure 11b).

Another improvement in the stability of the edge region 17 is achieved when the entire edge region 17 has a corrugation, which ensures a stability against cracks, which is indicated in Figure 11c.

Also, a turbulator or a spacer 8, which is arranged between two adjacent passages 4 (as shown in Figure 11d) * contributes to improving the strength of the Randberetch 17 at.

For all the variants explained, aluminum, stainless steel, copper or the like is used as the material for the plate-shaped heat exchangers 2. The density of the plate-shaped heat exchanger 2 in a package is to make variable, just as the longitudinal and transverse dividing arrangement of the passages 4 of the plate-shaped heat exchanger 2 is variable. A use of the described plate-shaped heat exchanger 2 is not only possible in a charge air cooler, but also in Abgaskühiern, in evaporators or radiators conceivable.

By the device described a high performance increase in the heat exchange of the cooling device is possible. In this case, a reduced increase in pressure loss of the charge air is ensured and given a mechanical stability of the edge region against vibrations,

Claims

P aht ta pspr o

1. Plate-shaped heat exchanger for a, at least one heat exchanger package having cooling device, in particular for a motor vehicle, comprising a plurality of openings (7) for receiving a, a coolant-carrying tube, each opening (7) of a passage (4) is surrounded and between the

Passages (4) several Aussteltungen (10, 11, 15, 16) are distributed for heat exchange with the medium to be cooled, characterized in that a plurality of exhibitions (10,11, 15, 16) are arranged around a passage (4) _. , wherein the exhibitions (10, 11, 15, 16) have a shape which a targeted heat conduction of the

Exhibition (10, 11, 15, 16) on the passage (4) guaranteed.

2. Heat exchanger according to claim 1, characterized in that the exhibitions (11, 15, 16) are arranged approximately in a circle around the passage (4),

3. Heat exchanger according to claim 1 or 2, characterized in that the stiffener (10) is formed kreissegmentähnlich.

4. Heat exchanger according to claim 3, characterized in that the width and / or the length and / or the height of the kreissegment- similar exhibition (10) and / or the distance between two adjacent kreissegmentähniichen exhibitions (10) ühd / or the distance of circular segment-like exhibition (10) to a passage (4) depends on the heat to be achieved by the kreissegmentähniichen exhibition (10) on the passage (4).

5. Heat exchanger according to claim 3 or 4, characterized in that the circular segment-like Aussteilungen (10) two or more rows around the passage (4) are arranged.

6. Heat exchanger according to claim 1 or 2, characterized in that the Aussteilungen (11, 15, 16) are arranged like a beam around the passage (4).

7. The heat exchanger according to claim 6, characterized in that in the direction of the rim (4) facing ends (12) of the radiation-fenähniichen exhibitions (11, _15th, 16) approximately in a circle around the passage (4) are arranged _* along with the longitudinal extent of at least one radiation-like exhibition (11, 15, 16), a first material overhang (13) extends, which the air exchange in

Direction of passage (4) releases and in particular the width of the radiation-like exhibition (11, 15, 16) and / or the height of the radiation-like exhibition (11, 15, 16) and / or the depth of the radiation-like exhibition (11, 15, 16) of the thermal conduction to be achieved by the radiation-like exhibition (11, 15, 16) on the passage

(4) depends.

8. Heat exchanger according to claim 6 or 7, characterized in that the beam-like exhibitions (11, 15, 16) are subdivided into at least two groups (18a, 18b) which are arranged around the passage (4) such that each group ( A heat exchanger according to at least one of the preceding claims, characterized in that the Passage (4) at a distance from the surface of the heat exchanger (2) a second material Overhang for receiving an overlying heat exchanger (2). 10. Heat exchanger according to at least one of the preceding claims, characterized in that to increase the strength of the edge region (17) of the heat exchanger (2) of the edge region (17) has a Weifung and / or in the edge region (17) at least one bead (20) and / or at least one turbulator and / or at least one spacer (8) is arranged and / or the width of the edge region (17) is reduced to a first series of passages (4).