JP2006507469A - Heat transfer unit, in particular heat transfer unit for motor vehicle and method of forming the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat transfer unit having at least one side part and a method for forming the same, which can realize material saving.
A heat transfer unit, in particular a heat transfer unit for an automobile, comprising a pipe, a heat transfer fin and at least one side part, said side part being a substrate and at least one reinforcement. A heat transfer unit comprising: at least one heat transfer body having ribs, wherein at least one reinforcing rib is formed from a center piece of a deformed surface of the substrate.

Description

  The present invention relates to a heat transfer unit having pipes and fins for transferring heat and at least one lateral part, in particular a heat transfer unit for a motor vehicle. Furthermore, the present invention relates to a method for forming a lateral part of a heat transfer unit.

A heat transfer unit of this kind is known from the German publication DE 19753408A1 of the present applicant. The heat transfer body described therein has a fin / pipe block with a number of pipes and corrugated fins connected to each other according to the form of the net structure. To stabilize the fin / pipe block, particularly during the manufacturing process, the fin / pipe block is surrounded on both sides by two lateral portions. For strength reasons, this type of side part has a substantially U-shaped profile in cross-section, which provides a great material saving compared to the solid side part. In that case, a substantially U-shaped profile is produced by deforming the edge region of the sheet band, the width of the sheet band being the sum of the length of the two legs of the U-shaped profile and the width of the side part. Obtained from. In that case, the two U-legs act largely as reinforcing ribs, as they prevent unwanted deformation of the side portions. In order to improve the distribution of thermal stress during the drive of the heat transfer body, the reinforcing rib has an extension region, which is formed as a folded bead.
German publication DE 19753408A1

  It is an object of the present invention to provide a heat transfer unit having at least one side part and a method for forming the same that can realize material savings.

  This problem is solved by a heat transfer unit having the features of claim 1 (ie, a heat transfer unit characterized in that at least one reinforcing rib is formed from a deformed center piece of the substrate). Is done.

  According to the invention of claim 1, the heat transfer unit has at least one heat transfer unit. The heat transfer unit can also be formed from two or more heat transfer units. The heat transfer unit has a pipe, the pipe being flowed through by at least one first medium and the second medium being able to flow therethrough so that from at least one first medium Heat transfer to the second medium or vice versa is possible. In order to increase the heat transfer area, heat transfer fins are disposed between the pipes, and the heat transfer fins are in thermal contact with the pipe.

  The heat transfer unit has a side portion on at least one side, the side portion having a substrate, which is in contact with the outermost pipe or the outermost fin. In particular during the manufacturing process, in particular during the soldering process, stabilization by at least one lateral part of the pipe / fin block formed from pipes and heat transfer fins is desirable. For this reason, the lateral part has at least one reinforcing rib. Preferably the side part has two or more reinforcing ribs.

  The object of the invention is solved preferably by the fact that at least one reinforcing rib is formed by a deformed surface center piece of the substrate in the lateral part. For this purpose, during the formation of the lateral part, the edge of the surface center piece is partly cut in advance and then the surface center piece is cut and raised from the plane of the substrate. Unlike the previously known side portions, where the reinforcing ribs are formed from the deformed surface edge region of the substrate, to form the side portions according to the invention, the width of the substrate is reduced. It is possible to use a thin plate band having a corresponding width. For this reason, favorable material savings are obtained, which leads to a reduction in the material costs of the heat transfer unit.

BEST MODE FOR CARRYING OUT THE INVENTION

  Preferred embodiments of the invention are the subject of the dependent claims.

  According to a preferred development, the at least one reinforcing rib extends in the longitudinal direction of the lateral part. Thereby, the side part is reinforced in this longitudinal direction. In other embodiments, the at least one reinforcing rib extends laterally of the side portion so that the side portion is reinforced laterally.

  According to a preferred embodiment, at least one fixing means is provided on at least one of the reinforcing ribs. Particularly preferably, the fixing means is formed by a deformed reinforcing rib or by a deformed portion of the reinforcing rib. Thereby, it is possible to fix other devices, such as dryers, to the heat transfer unit without the use of additional materials. Similarly, a fixing means is also conceivable, in which the heat transfer unit can be installed in the engine compartment of the automobile.

  According to a preferred form, the lateral part has at least one extension part. The stretch portion is formed by one or more notches and a plurality of webs adjacent to the notches, in which case the notches are preferably aligned with each other. In that case, the at least one notch is caused by deforming the surface center piece from the substrate plane and is therefore associated with the corresponding surface center piece. This means that each one reinforcing rib and its associated notch are adjacent to each other.

  Particularly preferably, the web has a folded bead. Thereby, a particularly good extensibility of the lateral part in the region of the extended part formed by the notch and the web is obtained.

  The object of the present invention is to provide a method for forming a side part according to claim 9 (ie in a method for forming a side part for a heat transfer unit having at least one heat transfer body, processing step: a) Providing a flat sheet having a width b approximately equal to the width of the side part, b) partially cutting the edge of at least one face piece of the sheet, and c) forming at least one reinforcing rib For this purpose, this is also solved by a method for forming a side part, characterized in that at least one face piece is deformed from a plane defined by a flat sheet. The basic idea of the present invention is that when forming the side part, it is possible to use a flat sheet that does not have excessive dimensions with respect to the substrate of the subsequent side part. The material can be saved compared to the forming method used. The reinforcing rib is formed from the already existing piece of sheet. For this purpose, each edge of the face piece is partially cut in advance, and then the face piece is cut and raised from the plane defined by the sheet.

  Hereinafter, the present invention will be described in detail using embodiments with reference to the drawings.

  1 and 2, the side portion 100 is shown in perspective or sectional view, in which case identical features are provided with identical reference numerals in both figures. The side portion 100 has a substrate 110 and two reinforcing ribs 120 and 130. In this case, the reinforcing ribs 120 and 130 are made of a central piece of the surface of the substrate 110 cut and raised from the plane of the substrate 110. For example, a rectangular surface center piece 120 is cut out for this purpose at three edges 140, 150 and 160, and along the edge 170, the surface center piece 120 is substantially perpendicular to the substrate 110. It is bent to stand. By “standing” the surface center piece 120 in this way, the notch 180 remains in the substrate 110. In addition, the reinforcing ribs 120, 130 have notches 190, 200, which are provided for receiving pins not shown, in which case the pins are likewise not shown. At the same time, it is used as a tightening device for forming a heat transfer body.

  In other, not shown embodiments, the heat transfer bodies are grouped together during their formation, in particular during the soldering process, by means of so-called tensioning cages, rather than by tensioning belts. In that case, the pin for holding the tightening belt is omitted, and the corresponding notch is not provided.

  FIG. 3 shows a comparison between a thin plate band 300 for forming a side portion for a heat transfer body according to the prior art and a thin plate band 400 for forming a side portion according to the present invention. In this case, the side portions to be formed from the thin plate bands 300 and 400 each have a width b and a reinforcing rib having a height H. For this purpose, the thin band has a width b + 2h, in which case the subsequent thin plate portion of the substrate is formed by a central region 310 having a width b. The edge portions 320 and 330 are cut and raised from the drawing plane of FIG. 3 along the deformed edges 340 to 350 shown by broken lines and used to form the reinforcing ribs of the rear side portion. Furthermore, the thin band 300 which has already been punched in advance has a protrusion 360, which is provided for joining the water case.

  On the other hand, the thin plate band 400 forms the substrate 410 of the subsequent thin plate portion with the entire width b. In order to form the reinforcing ribs, the plane center pieces 420 and 430 of the substrate 410 are cut out along the edges 440, 450 to 460 and cut out from the drawing plane of FIG. 3 along the deformed edges 480 to 490. . In this case, the width h of the surface center pieces 420 and 430 corresponds to the height of the subsequent reinforcing rib. Similar to the thin plate band 300, the pre-punched thin plate band 400 also has a protrusion 495 for coupling the rear side portion to the water case.

  This contrast makes it clear that a heat transfer body with a side part according to the invention can be formed with less material use than a heat transfer body with a side part according to the prior art. In that case, it is not necessary to give up important functional features such as, for example, the width of the substrate or the reinforcement by the reinforcing ribs provided to cover the heat transfer fins.

  FIG. 4 shows a coolant cooler 500 for use in an automobile. The coolant cooler 500 has a pipe / fin block 510 with pipes 520 and corrugated fins 530. The ends of the pipe 520 communicate with the collection cases 540-550 on both sides of the pipe / fin block 510. The end faces 555 to 558 of the collection cases 540 to 550 are closed. The collection cases 540 to 550 have an inflow opening 560 and an outflow opening 570 to supply or carry out the coolant. In particular to protect the outermost corrugated fin 580, the pipe / fin block 510 is surrounded by side portions 590 on both sides. The function method of this coolant cooler is as follows. Coolant from the automobile internal combustion engine flows into the water case 540 through the inflow opening 560 where it is distributed to the pipe 520. After flowing through the pipe / fin block 510, the coolant is collected in the water case and returned to the vehicle coolant circulation through the outlet opening 570. To cool the coolant, ambient air is guided through the pipe / fin block 510 so that the cooling air flows around the pipes 520 and fins 530. In that case, the corrugated fins 530 are used to increase the heat transfer area and are soldered to the pipe 520 for better heat transfer.

  During the soldering process, it is necessary to tighten the pipe 520 and fin 530 to prevent the pipe / fin block 510 from separating from each other. It is brought about by so-called tightening bands. Even with the use of a tightening frame or tightening cage acting on the side parts, the pipes, fins and side parts can be tightened well as well. As a protection from unwanted deformation, the outermost corrugated fin 580 is covered by the side portion 590 during the tightening process, and thus also during the soldering process. Reinforcing ribs 600 and 610 are provided in the side portion 590 to reinforce against undesirable deformation. These reinforcing ribs 600, 610 are formed by a deformed center piece of the substrate 620 of the side portion 590, thereby achieving material savings.

  As a development of the previous embodiment, FIG. 5 shows a heat transfer unit 700 consisting of two heat transfer bodies, namely a coolant cooler 710 and a condenser 720. In the structure and function method, the coolant cooler 710 is hardly different from the coolant cooler shown in FIG. 4 and therefore will not be described in detail here. Condenser 720 also has two collection cases 730 and 740 and a pipe / fin block not visible in the figure, located roughly between them, which pipe / fin block was formed as a collection pipe Collection cases 730 and 740 are coupled together. Condenser 720 is positioned next to coolant cooler 710 such that cooling air flows first through condenser 720 and immediately following coolant cooler 710. The condenser 720 is used for cooling the refrigerating material in the air-conditioning circulation, in which case the refrigerating material is condensed in the condenser. Since the coolant cooler pipe 750 is arranged in alignment with the rear of the condenser pipe when viewed in the main flow direction of the cooling air, the connected corrugated fins 760 can be used in common. Accordingly, the corrugated fins 760 extend from the inflow side of the condenser to the outflow side of the coolant cooler.

  In order to protect the outermost corrugated fins 770, a side portion 780 is provided which also extends from the inflow side of the condenser to the outflow side of the coolant cooler. The side portion 780 is reinforced by two reinforcing ribs 790 and 800, in which case the reinforcing ribs 790 and 800 are formed from the center piece of the substrate 810 of the side portion 780. The side portion of the heat transfer unit 700 facing the side portion 780 is similarly arranged, but only one side portion can be seen in FIG. Thus, the common pipe / fin block 830 of the coolant cooler 710 and the condenser 720 can be pre-tightened by the common side portions 780-820 from both sides in a single work step, and soldered in other work steps. Can be attached.

  In another embodiment not shown, the heat transfer unit consists of a high temperature cooler and a low temperature cooler, or an oil cooler and a condenser, in which case the oil cooler is in some cases a transmission oil cooler. Other combinations of any heat transfer body are conceivable as well.

  Furthermore, it is also possible to provide one or more, preferably two side parts, in a heat transfer unit consisting of three or more individual heat transfer elements, in which case again as individual heat transfer elements Any heat transfer body is contemplated.

  FIG. 6 shows another example for a side portion 900 having a substrate 910 and reinforcing ribs 920, 930 and 940. In that case, the reinforcing ribs 920, 930 and 940 are associated with the notches 950, 960 to 970, which correspond to the very center piece of the substrate 910 and from the substrate to the reinforcing ribs 920, 930 to 940. Is formed by desired deformation. In this case, the deformation can be performed in a parallel manner as in the reinforcing ribs 920 and 930, or in an antiparallel manner as in the case of the reinforcing ribs 930 and 940. A tightening pin (not shown) can be inserted into the notches 980, 990 and 1000 in the same manner as in the embodiment of FIG. 1, so that the heat transfer unit having the side portion 900 is not shown in the drawing band. Can also be tightened during the manufacturing process.

  In other, not shown embodiments, the heat transfer bodies are grouped together during their formation, in particular during the soldering process, by so-called tightening cages, rather than by tightening bands. In that case, the pin for holding the tightening band is omitted and the corresponding notch is not provided.

  FIG. 7 shows a perspective view of a side portion 1100 for a heat transfer unit, not shown, having two different heat transfer units. The side portion 1100 has an extension 1125 between a region 1110 associated with the first heat transfer body and a region 1120 associated with the second heat transfer body. The ability of the stretch region 1125 to stretch is provided by the notch 1130 so that the regions 1110 and 1120 are joined together only by the web 1140, in which case the web 1140 is formed in a bent shape so that it can stretch better. Has been. In that case, the notch 1130 is associated with the reinforcing rib 1150, which cuts the surface center piece 1130 on each of the three sides and then deforms along each of the fourth side edges, respectively. The side portion 1100 is cut and raised from the plane of the substrate 1155. Further, the side portion 1100 is reinforced by other reinforcing ribs 1160 and 1170, in which case the reinforcing rib 1170 further includes a holder 1190 having a fixing hole 1200. In this case, the reinforcing ribs 1160 and 1170 are formed by deformed surface edge pieces of the substrate 1155 of the side portion 1100, unlike the reinforcing ribs 1160 and 1170 formed by the deformed surface center piece of the substrate 1155. Has been.

  Further, the side portion 1100 has protrusions 1210 and 1220 at its ends, which are two of the heat transfer unit unit not shown, for which the side portion 1100 is provided. It is used to cover a water case (not shown) of two heat transfer bodies. In order to reduce mechanical loads, particularly due to thermal stresses, the side portion 1100 has two stretch regions 1230 and 1240, which are generally formed by notches 1250-1260.

  In other non-illustrated embodiments, the notches 1250 and 1260 are associated with reinforcing ribs that are directly adjacent to the notches 1250-1260 and of the central piece of the substrate 1155 of the side portion 1100. In this case, the notches 1250 and 1260 are caused by the deformation of the center piece of the surface.

  FIG. 8 shows a portion of a side portion 1300 having various reinforcing ribs 1310-1320 and associated cut-out surface center pieces 1330-1340. The reinforcing rib 1310 extends in the longitudinal direction of the side portion 1300 and has a notch 1350 for a tightening pin, and the reinforcing rib 1320 extends at an angle α with respect to the longitudinal direction of the side portion 1300. And has no notches. In principle, the reinforcing rib 1320 can be similarly provided with a notch for the tightening pin.

  The reinforcing ribs 1320 extend at an angle α of about 10 ° with respect to the longitudinal direction of the side portion, thereby providing a preferred geometric arrangement of the reinforcing ribs, in which four reinforcing ribs are aligned in the region 1360. At least in this region 1360, a particularly high stability of the lateral part is provided. In other embodiments, the angle is arbitrary between 0 ° and 90 °.

  FIG. 9 shows a portion of the side portion 1400 in which the reinforcing ribs 1410 are formed by pre-cutting the edges 1420, 1430 from a flat sheet, and these are shown in FIG. The edge of the plate together with the edge 1440 of the thin plate defines a face piece that is bent from the thin plate plane in the direction of arrow 1450 by an angle of about 90 °.

  Especially in the region of the bent edge 1460, the angle may be smaller than 90 °. This is true for all lateral parts or heat transfer units according to the invention.

It is a perspective view which shows a side part. The lateral part is shown in cross section. Two thin metal plates are shown in a top view. It is a perspective view which shows a heat transfer body. It is a perspective view which shows a heat-transfer body unit. It is a perspective view which shows a side part. It is a perspective view which shows a side part. A part of the side part is shown. A part of the side part is shown.

Explanation of symbols

100, 590, 780, 820, 900, 1100, 1300, 1400 Side portions 110, 410, 620, 810, 910, 1155 Substrate 120, 130, 600, 610, 790, 800, 920, 930, 940, 1150, 1160, 1170, 1310, 1320, 1410 Reinforcing ribs 140, 150, 160, 440, 450, 460, 1420, 1430 Edges 180, 190, 200, 950, 960, 970, 980, 990, 1000, 1130, 1250, 1260 Notch 300, 400 Thin band 310, 1110, 1120, 1360 Region 320, 330 Edge part 340, 350, 480, 490 Deformed edge 360, 1210, 1220 Protruding part 420, 430, 1130, 1330, 1340 Center of surface Fragment 500, 710 Coolant cooler 510, 830 Pipe / fin block 520, 750 Pipe 530, 580, 760, 770 Corrugated fin 540, 550, 730, 740 Collection case 560 Inflow opening 570 Outflow opening 700 Heat transfer unit 720 Condensation 1125 Extension part 1140 Web 1190 Holder 1200 Fixing hole

Claims (9)

Heat transfer unit, in particular a heat transfer unit for an automobile, comprising a pipe, a heat transfer fin and at least one side part, said side part comprising a substrate and at least one reinforcing rib. Consists of at least one heat transfer body,
The heat transfer unit, wherein at least one reinforcing rib is formed from a deformed center piece of the substrate.   The heat transfer unit according to claim 1, wherein at least one reinforcing rib extends in a longitudinal direction of the side portion.   The heat transfer unit according to claim 1, wherein at least one reinforcing rib extends in a lateral direction of the side portion.   4. The heat according to claim 1, wherein the at least one reinforcing rib extends at an angle α having 0 ° <α <90 ° with respect to the longitudinal direction of the lateral part. Transmitter unit.   The heat transfer unit according to any one of claims 1 to 4, wherein a fixing means is provided on at least one reinforcing rib.   6. The heat transfer unit according to claim 5, wherein the at least one fixing means is formed by at least partially deformed reinforcing ribs.   The lateral part has at least one extension part, said extension part being formed by one or more notches, in particular aligned with each other, and a plurality of webs adjacent to the notches, in which case The heat transfer body unit according to any one of claims 1 to 6, wherein at least one notch is associated with a surface center piece of the substrate deformed as a reinforcing rib.   The heat transfer unit according to claim 7, wherein the web has a folded bead. A method of forming a side portion for a heat transfer unit having at least one heat transfer body, comprising the following steps.
a) providing a flat sheet having a width b substantially equal to the width of the side portion;
b) partially cutting the edge of at least one face piece of the sheet, and c) deforming at least one face piece from the plane defined by the flat sheet to form at least one reinforcing rib. Step to do.

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