DE102005048227A1 - Radiator, cooling circuit, air conditioner for a motor vehicle air conditioning system and air conditioning for a motor vehicle - Google Patents

Abstract

The invention relates to a radiator for a cooling circuit of an air- or water-side controlled air conditioning of a motor vehicle, wherein the radiator (1) has a plurality of coolant flow-through flat tubes (5), each for limiting at least one in the flat tube interior (22) extending Channel (23, 24) have a flat tube wall (21), wherein the flat tube wall (21) at least one of the flat tubes (5) has different wall thicknesses (26; 27, 28, 29, 30, 31).

Description

The The invention relates to a radiator for one Cooling circuit an air or water side controlled air conditioning of a motor vehicle, Air conditioning unit for a motor vehicle air conditioning system, a cooling circuit for one air or water side regulated automotive air conditioning system as well an air conditioner for one Motor vehicle.

One Air conditioning system for Motor vehicles usually consists of the subsystems heating circuit and refrigeration cycle, as well as the air conditioner, one air duct to the air conditioner and the outlet openings as well as from the HMI device for the Air conditioning (including the associated control and the associated sensors).

The air conditioning has a radiator. The radiator is in a cooling circuit integrated. The coolant this cooling circuit For example, is also led to the engine of the motor vehicle.

Be soldered radiators in the passenger car and commercial vehicle sector for different engines and different cooling circuits in the air and water side regulated air conditioners used. The case in the different Cooling circuits, i. especially in different vehicles, occurring stresses, in particular stresses of the radiator, differ from the Part clearly in terms of temperatures, pressures, coolant, flow, etc. This has the consequence that the flat tubes (different radiators in In terms of wall thickness may or may not be dimensioned differently. For example In commercial vehicle applications, the wall thickness of the flat tubes often be greater as in applications in passenger cars. But also in the area Passenger cars as well as in the field of commercial vehicles exist - taken by themselves - at different Vehicle types have different sizing requirements Wall thickness the flat tubes.

Known radiator generally have at least one coolant box, the one Soil forms. Inside the coolant box can one or more partitions be provided, which divide the interior of this box into sub-chambers and for deflecting the radiator flowing through the radiator serve. The partitions can be arranged so that they cause a deflection in the depth or so that they cause a deflection in the width. As part of the production of a partition or the partitions in the boxes used. Furthermore, the flat tubes are in the bottom of the box plugged or molded on this. The production of flat tubes even occurs in the known radiators so that a corresponding cut sheet of constant thickness by means of a special Device, the roller sets has, is formed into a flat tube. The flat tube will then at the butt edge welded or soldered. It can also be provided that soldered discs are used.

Around the requirements of the already mentioned, different demands to meet is usually For each specific application, the maximum in operation occurring voltage of the flat tubes determined. Dependent on This maximum occurring voltage is then the required sheet thickness of the sheet determined from the then the flat tube in explained Way is shaped.

The 1a to 1f show such a flat tube in different partial views. 1a shows the flat tube 50 from above. With the reference number 52 is schematically the longitudinal axis or longitudinal direction of this flat tube 50 indicated.

1b shows the flat tube according to 1a from the side or from the point of view of the line I bI b in 1 , The 1c and 1d show sections along the line I cI c and I dI d 1 that is the same place. On the differences in the 1c and 1d Illustrated designs will be discussed below.

1e shows the area 54 out 1c in an enlarged view and 1f shows just this area 54 out 1d in an enlarged view.

The flat tube 50 has a flat tube wall 56 on, by means of which in the flat tube 50 formed channels 58 . 60 is provided. The flat tube wall 56 makes beads 62 . 64 off, on opposite areas of the flat tube wall 56 be formed on the flat sides of the tube seen in its broad side in cross-section. The areas of the flat tube wall 56 that the beads 62 and 64 train, contact each other on their sides facing each other and are - as by the blackened areas 66 . 68 , in the 1d are provided for the suggestion provided there solder joints - soldered together, so that sealed against each other channels 58 . 60 be formed in the flat tube.

While the 1d the flat tube 50 after soldering at the points indicated, is the flat tube 50 in 1c shown before soldering. The flat tube 50 is - as mentioned - formed from a sheet of constant thickness, the free, ever because in the direction of the longitudinal axis of the flat tube extending ends to form the circumferentially closed flat tube wall is soldered or welded, which in the 1a to 1f is not highlighted separately.

The 5a to 5f show views of a known flat tube, which are essentially the views 1a to 1f correspond. In contrast to the basis of the 5a to 5f illustrated flat tube is in the design according to the 5a to 5f the beads 62 . 64 but shaped differently. These beads 62 . 64 are in the design according to the 5a to 5f in cross-section each substantially V-shaped, wherein the tip of the "V" and the opposite ends of the tip of the "V" are rounded or curved.

Of the The invention is based on the object, a reliable radiator to create, which is well adapted to it or adaptable, in a cooling circuit an air or water side controlled air conditioning used to become.

In particular, according to the invention a radiator according to claim 1 or according to claim 2 proposed. An inventive air conditioner with a such radiator is the subject of claim 15. An inventive cooling circuit for one Air or water side regulated air conditioning with a radiator is Subject of claim 16. An automotive air conditioning system according to the invention is the subject of claim 17. Preferred designs are the subject the dependent claims.

In particular, according to the invention a radiator for one Cooling circuit an air or water side controlled air conditioning of a motor vehicle proposed. The radiator has a plurality of flow-through of a coolant flat tubes on. These flat tubes each have at least one limit in the flat tube interior extending channel a flat tube wall on. The (respective) flat tube wall of one, several or all of these Flat tubes has different wall thicknesses.

According to the invention is further in particular a radiator according to claim 2 proposed. It is especially provided that one, several or all flat tubes of the radiator extruded flat tubes are.

In A particularly preferred embodiment is a flat tube or more or all flat tubes of the radiator extruded flat tubes, wherein the respective flat tube walls This or these flat tubes have different wall thicknesses. It can be provided that the different wall thicknesses in Frame of extrusion have been formed.

As addressed, the radiator has a Variety of flat tubes on. It can be provided that all Flat tubes of the radiator identical are designed. But it can also be provided that the radiator different designed flat tubes. To simplify the following Representations should be noted in advance that statements, in particular refer to the configuration of one or the flat tubes of the radiator according to the invention, in the following, in particular with regard to "a" flat tube being represented. The radiator according to the invention or its developments of course also each have a plurality of flat tubes of each type described or it can be provided that all flat tubes in the respective described type are formed.

In advantageous embodiment, the flat tube wall of the flat tube in their transverse or perpendicular to the flat tube longitudinal axis cross-section different wall thicknesses on. It can be provided that essentially all in the mentioned longitudinal direction Seen cross sections of the flat tube are designed identically. Alternatively, however, can also be provided that in the mentioned longitudinal direction different cross sections exist. For example, too be provided that in the addressed longitudinal direction of the flat tube in different cross sections different wall thickness given are. However, it is particularly preferred that Although the flat tube wall in a direction perpendicular to the flat tube longitudinal axis considered section has different wall thicknesses, these wall thicknesses for every Position of the cross section in flat tube longitudinal direction, however, constant are.

In a particularly preferable embodiment is the ratio of maximum wall thickness to the minimum wall thickness of the flat tube is greater than 1.1 or greater than 1.2 or greater than 1.3 or greater than 1.4 or greater than 1.5 or greater than 1.7 or greater than 1.9 or greater than 2. It can also be provided that the mentioned ratio is greater than 2.5 or greater than 3 is. Also significantly larger values are preferred. In a particularly advantageous embodiment relate the mentioned circumstances on a perpendicular to the pipe axis located cross-section or perpendicular to the pipe axis located cross sections.

According to an advantageous development the wall thicknesses of the flat tube are adapted at least qualitatively to the voltage conditions in the flat tube wall occurring during operation and when used in a cooling circuit of an air-conditioning or water-side controlled air conditioning system of a motor vehicle. This may in particular be such that at the highly stressed points, ie at the points where in the flat tube wall, a high voltage occurs, greater wall thickness is given and at locations where the stress ratios are lower in the flat tube wall, given smaller wall thicknesses , It can be provided that this qualitative adaptation is quite crude. It can also be provided that the different wall thickness is adapted quantitatively or quantitatively approximated to the voltage conditions occurring in the flat tube wall during operation and when used in a cooling circuit of an air or water side controlled air conditioning system of a motor vehicle. This can for example be such that the wall thickness is at least for the most part a proportional representation of the stress conditions in the flat tube wall.

Especially however, a qualitative adaptation is already advantageous the tension conditions, and in particular with respect to the perpendicular to the flat tube longitudinal axis located cross section.

It is provided in particular that the radiator at least one coolant box in which the flat tubes with at least one of its ends lead. Particularly preferably, the radiator on two coolant boxes. In a design with two coolant boxes can be provided for example that these spaced from each other are provided, wherein arranged between these boxes, the flat tubes of the radiator are and with their one end in the one of these coolant boxes and open with their other end in the other of their coolant boxes. Especially at Such a design can be provided that the flat tubes are substantially straight formed substantially. The flat tube ends can for example, be twisted in each case, in particular around 90 °. Is preferred but also that the flat tubes are free of twisted ends are.

In advantageous embodiment has at least one coolant box at least one partition, by means of which the interior of this Coolant tank is divided into separate sub-chambers. It can be provided be that such a partition is a transverse partition, the transverse to the longitudinal axis of the coolant box is arranged. Such a partition can also be a longitudinal partition be substantially in the longitudinal direction of the coolant box runs. Also combination of such partitions are preferred. The mentioned partitions can in particular for a deflection of the coolant be provided in width or in depth. Furthermore, it can be provided be that in the longitudinal direction spaced a plurality of transverse partitions are arranged to each other.

In Advantageous development, the flat tube in the transverse or vertical to its longitudinal axis considered cross section at least one bead.

In Particularly preferred embodiment, the flat tube in one or in its transverse or perpendicular to its longitudinal axis considered cross sections in two opposite wall sections the flat tube wall in each case a bead, said opposite wall sections for the Formation of separate flow channels abut each other. This can For example, be such that the flat tube wall at a certain Point is drawn to form a bead inside and on the opposite Wall section of this bead also the flat tube wall under formation a bead is drawn inwards, wherein the se opposite wall sections Contact each other, especially in the bead area. It can be provided that these beads along the entire length of the Flat tube extend, so that by means of the abutting beads different flow channels for the coolant be formed.

in the perpendicular to the longitudinal axis the flat tube considered cross sections is the bead or are the Beading advantageous manner on the wide side of the flat tube arranged. In the mentioned cross section, the flat tube extends in a width direction and a height direction perpendicular thereto. The width direction is the direction in which the flat tube larger dimensions than in the height direction. In height direction the expansion of the flat tube is thus less than in the width direction, so that it is flat.

It may also be provided that in each case at least one bead is provided at a plurality of points spaced in the width direction in the cross section considered transversely to the flat tube longitudinal axis. It can be provided that are provided at several spaced apart in the width direction points each on opposite sides beads, the opposite regions, each forming the beads contact each other so that each separate flow channels are formed. By means of such beads or bead pairs, the flat tube may be formed, for example, for a single or multiple deflection. This can for example be such that in a channel of the flat tube, with formed of such a pair of beads or separated from an adjacent channel, the coolant flows from one coolant box into another, opposite coolant box, is deflected there and flows back through a further channel of the same flat tube. Such a deflection can be provided multiple times, in each case adjacent channels of the flat tube can be separated from each other by means of an addressed bead or an addressed pair of beads.

The Flat tube, the formation of the coolant boxes or the flow interconnection can - in particular by means of one or more partition walls arranged in the coolant box (s) - so be that the same flat tube in operation in different, opposite flow directions flows through becomes what separate channels be formed.

In an advantageous embodiment is provided that the flat tube one or more support bars has, the or in the interior of the flat tube on opposite wall sections the flat tube wall is supported. This can for example be such that the one or more support webs opposing Portions of the flat tube wall extending in the width direction of the flat tube across from supports each other or yourself to this opposite Supported sections. Of the or the support webs can be formed so that they are along the entire length of the Flat tube extend. Such support webs, for example, to increase the Stiffness be provided. By means of the support webs, a channel or Sub-channel of the flat tube to be divided into sub-channels. It can be provided that these sub-channels by means of a support bar be formed, in the same flow direction of the coolant flows through be or lead to the same chambers of the or the coolant boxes.

In particularly preferable embodiment has at least one coolant box at least one partition, by means of which the interior of this Coolant reservoir is divided into separate sub-chambers, wherein in the Partition wall slots are introduced, in each of which a flat tube is recorded. This is especially so that the flat tube one in its longitudinal direction seen end is inserted into a slot of the partition. This may be such that the respective flat tube from the respective slot in the transverse or perpendicular to the longitudinal axis The cross-section seen from the flat tube is encompassed from the outside, namely such that at least one section delimiting the slot of the partition engages in a bead of the flat tube. For example, can be provided be that - how mentioned above - on opposite sections the flat tube wall in each case beads are introduced and the flat tube with one end inserted into a slot in the partition, that opposite, the slot of the partition wall limiting portions of the partition itself extend in these beads.

It can be provided that the partition opposite to itself in their slots extending flat tubes are sealed in the slot areas. This seal can be achieved for example by means of soldering become.

In In this context, it should be noted that the radiator in particularly preferred embodiment is a soldered radiator. The radiator can be soldered for example in Lotplattier method. The radiator can have at least one row stacked flat tubes, wherein the respective adjacent flat tubes are arranged spaced from each other and wherein in the gaps formed between each adjacent Flat tubes corrugated fins for an air flow are provided. This can for example be such that the corrugated fins are arranged such that the air flow is transverse or perpendicular to the coolant flow through the flat tubes takes place. The corrugated ribs may in particular be such that they contact the respective adjacent flat tubes. The corrugated ribs can For example, be soldered to the adjacent flat tubes each.

It So it is especially provided that the flat tubes to the Support corrugated ribs can or vice versa.

Of the radiator thus preferably has a tube-rib block. In an advantageous manner Embodiment, the flat tubes are arranged so that their substantially transverse or perpendicular to their heights or in the length direction and widthwise extending surfaces substantially parallel aligned with each other.

In an advantageous embodiment, the wall thickness of the flat tube wall in crosswise or perpendicular to the flat tube longitudinal axis considered cross section in the opposite, lying in the width direction end portions is greater than in areas that follow in this cross section of the lying in the width direction end portions. Furthermore, it is particularly preferred that the flat tube forms beads, in particular in the manner already explained above, wherein the wall thicknesses of the flat tube wall are greater in the area of these beads and / or in areas adjoining these beads than in the areas which are in each case beaded. facing away from the adjoining the beads areas. If the flat tube forms a bead or a pair of beads of the above type, beispielswei be provided that in the considered perpendicular to the flat tube longitudinal axis cross-section, the wall thickness in the width direction given end regions and in the region of the bead and / or in the adjoining the bead on both sides is greater than in an intermediate region located in the width direction between the one is located in the width direction end portion and the nearest, adjoining the bead area, and is greater than the wall thickness, which is given in an intermediate region which is located between the other end portion and this end portion of the closest, adjoining the bead area is located.

If two beads or bead pairs are provided in the width direction, areas lying in the width direction can be described as follows:
First end region, first intermediate region, first region adjacent to a first bead, first bead, second region adjacent to the first bead, second intermediate region, first region adjacent to the second bead, second bead, second region adjacent to the second bead, second end region. For three, four, five or more widthwise spaced bead pairs, further sequences of intermediate region adjacent to the i th bead would be between the second region adjacent to the second bead and the intermediate region adjacent to the second end region Range, i-th bead, adjacent to the i-th bead adjacent second region, where i is a natural number running from three to n, where n is the number of widthwise spaced beads or bead pairs in such a Design is advantageously provided that in the region of the end regions and the respective first and second respective adjacent to the beads region and / or in the region of the respective beads, the wall thicknesses are greater than in the intermediate regions.

In In a particularly preferred embodiment, it is provided that all Flat tubes of the radiator are designed essentially identical.

In advantageous embodiment, the coolant box has a box lid and an associated tube sheet, wherein the flat tubes open into the tubesheet and / or in one or more openings provided there are inserted.

each the flat tubes is designed in one piece in an advantageous embodiment.

The The bead or the beads are preferably on the flat tube outside provided that one or more beads are given.

It should be noted is that in the places of this revelation to those of the cross or perpendicular to the flat tube longitudinal axis cross section is spoken, this at least on each a cross section of the type mentioned or on all cross sections of mentioned type may be related.

According to the invention is further in particular an air conditioner for one Air conditioning of a motor vehicle proposed, wherein the air conditioner a suction device for sucking in air and an air discharge device for the Edition of the air conditioner flowing through Air and one of sucked air permeable evaporator and a of air flowed through by sucked air heater. Of the radiator is in accordance with the invention designed.

The invention is further in particular a cooling circuit according to claim 16 proposed. Furthermore, according to the invention in particular an air conditioner according to claim 17 proposed.

in the Below is an embodiment the invention with reference to the attached Figures closer explained become:

there shows:

1a to 1f a flat tube made of a sheet metal, in different views or partial views or stages of manufacture, which can be used in a radiator of known type;

2a to 2c an exemplary radiator according to the invention for a cooling circuit of an air or water side controlled air conditioning of a motor vehicle, the wahlweiese with flat tubes according to the 3a to 3d or according to the 4a to 4d is provided;

3a to 3d in various views and partial views, a first exemplary flat tube, which may be installed in an exemplary radiator;

4a to 4d in various views or partial views, a zwites exemplary flat tube, which may be installed in an exemplary radiator; and

5a to 5f a flat tube made of a sheet metal, in different views or partial views or production stages, which can be used in a radiator.

2a shows a radiator 1 with a upper coolant box 2 and a lower coolant box 3 between which a tube-fin block or a heat transfer network 4 , consisting of flat tubes 5 and corrugated ribs 6 , is arranged. The upper water tank 2 consists of a lid 2a and a tube sheet 2 B , which are soldered circumferentially with each other. The lower coolant box 3 also has a lid 3a and a tube sheet 3b on, which are soldered together. The tube sheets 2a . 3b take in a manner not shown, the ends of the flat tubes 5 fluid-tight on, leaving the tubes 5 with the two coolant boxes 2 . 3 in fluid communication.

2 B shows the radiator 1 according to 2a in a side view, and 2c shows the radiator 1 in a top view. In the upper water tank 2 is a dashed partition wall 7 arranged, which the coolant box 2 in a coolant inlet chamber 8th and in a coolant exit chamber 9 divided. The entrance chamber 8th has an opening 10 for the entry of the coolant, and the chamber 9 has an opening 11 for the exit of the coolant.

All parts of the radiator are made of an aluminum alloy and are soldered together. In the longitudinal direction of the flat tube 5 is by means of the beads 32 . 33 or the forming portions of the flat tube wall a separation 12 causes, which is shown as a dashed line. The separation 12 divides the flat tube 5 in two chambers or flow channels, which are flowed through in different directions.

The coolant flows through the radiator 1 as follows: The coolant passes through the opening, represented by the arrow E 10 in the coolant box 2 or the inlet chamber 8th and then flows, according to the arrow I, through the in 2 B right-hand chamber from top to bottom, ie in the coolant box 3 , There, the coolant, following the arrow U, deflected and enters the in 2 B left-hand chamber of the flat tube 5 in order to flow from bottom to top, following the arrow II. The coolant then passes - after twice flow through the flat tube row S - in the outlet chamber 9 of the coolant box 2 and leaves via the exit opening 11 , following the arrow A, the radiator 1 , Shown is a design of a radiator 1 in which the coolant is deflected "in depth". Alternatively to a design of the radiator 1 , which is such that the coolant is deflected in the depth, but the radiator can also be designed so that the coolant "in the width", so compared to a deflection "in depth" rotated by 90 °, is deflected. According to a further preferred embodiment, the radiator 1 be designed so that the coolant is deflected "in width" and "in depth".

The air flow direction is shown by the arrows L, ie the radiator 1 Thus, the coolant first flows on the leeward side (I) from top to bottom through the radiator, is then deflected against the air flow direction, ie in depth, and then flows in a second passage (II) on the windward side of the heater 1 from the bottom up. This flow arrangement of coolant and air flow is preferred for high performance; However, it is also a cross-DC possible, ie the air flow direction L is rotated by 180 °, ie it would be in the 2 B from right to left.

The flat tubes 5 are extruded flat tubes. The respective flat tube wall of the flat tubes 5 has different wall thicknesses.

Exemplary designs of the flat tubes 5 optionally in the design according to the 2a to 2f can be given below in relation to the 3a to 3d , on the one hand, and 4a to 4d , on the other hand, explained.

The 3a to 3d show a first exemplary design of the flat tubes 5 , 3a shows a plan view of a flat tube 5 , 3b shows a view from the perspective of the line IIIb - IIIb 3a , 3c shows a sectional view taken along the line IIIc - III c 3a , 3d shows the area 20 out 3c in enlarged view.

The flat tube 5 has a flat tube wall 21 on, by means of which the flat tube inside 22 or flow channels formed by the flat tube 23 . 24 are limited to the coolant.

In perpendicular to the flat tube longitudinal axis 25 seen cross section (see. 3c ) has the flat tube wall 22 different wall thicknesses. In 3c are exemplary with the reference numerals 26 . 27 . 28 . 29 Wall thicknesses indicated, which are relatively larger compared to the wall thickness, with the reference numerals 30 . 31 are indicated.

The flat tube 5 has beads 32 . 33 on. The bead 32 is from or in a wall section 34 the flat tube wall 21 trained, and the bead 33 is from or in a wall section 34 opposite wall section 35 the flat tube wall 21 educated. The beads 32 . 33 extend along the entire length of the flat tube 5 in the longitudinal direction 25 , The beads 34 . 35 are provided on the flat tube sides, which are determined by the flat tube width and the flat tube length.

The flat tube width or the width direction of the flat tube is in 3c schematically by the double arrow 36 indicated. The perpendicular to the longitudinal axis 25 located cross-section of the flat tube 21 lies in a plane through the flat tube width 36 and the flat tube height is determined, the flat tube height in 3c schematically with the reference numerals or the double arrow 37 is indicated. The flat tube width is larger or significantly larger than the flat tube height.

By means of the beads 32 . 33 forming edge sections 34 . 35 is the flat tube 5 or the interior 22 of the flat tube 5 into the flow channels 23 . 24 divided, or are thereby the flow channels 23 . 24 separated from each other. This is here so that the wall sections 34 . 35 Contact on their sides facing each other, where they are fluid-tight in communication there.

In the design according to 3c is at high stress points or at locations where greater voltages occur, given a higher or significantly higher wall thickness than at locations where the stress or the voltages are relatively lower. Relative to the perpendicular to the pipe axis 25 Here, for example, located in cross-section in the width directions 36 both ends given 38 and 39 as well as on both sides in the width direction 36 to the beads 34 . 35 subsequent areas 40 . 41 the flat tube wall 21 a greater wall thickness of this flat tube wall 21 given, as in the first intermediate area 42 in the width direction 36 between the first end area 38 and the first one to the beads 32 . 33 adjoining area 40 given is. Correspondingly, in the second intermediate area 43 in the width direction 36 between the second, to the beads 32 . 33 adjoining area 41 and the second end region 39 is located, the wall thickness is lower than in the areas 38 . 39 . 40 . 41 ,

A relatively thicker design of the wall thickness of the flat tube wall 21 in the mentioned areas 38 . 39 . 40 . 41 may also be appropriate, for example, if the internal pressure or the pressure of the in the channels 23 . 24 flowing coolant is in each case substantially constant or if it is in each case perpendicular to the flow direction or longitudinal axis 25 each of which is substantially constant. Despite such a substantially constant internal pressure or an internal pressure whose differences can be regarded as negligible, namely in the flat tube wall 21 perpendicular to the longitudinal axis 25 considered cross-section along the flat tube wall 21 be given different voltages. As mentioned, it is provided in an advantageous design that on both sides, ie in 3c above and below, each corrugated ribs 26 on the flat tube 5 supported and soldered there. The corrugated ribs 6 can be over the entire flat tube width 36 extend and in Beitenrichtung 36 be traversed by air. In this case, the flat tube can 5 at least in the areas 42 and 43 at the respective adjacent corrugated ribs 6 support relatively well. At the in the width direction 36 seen ends of the flat tube 21 is - at least along the height - no or poor support on corrugated fins 6 given; also in the area of the beads 32 . 33 is no or poor support on the corrugated fins 6 given. This can lead to higher voltages on the flat tube wall in corresponding areas 21 training, which may extend to adjacent areas.

It can also be provided that the flat tubes in the stacked flat tube row are each located outside 5 at least on the side facing away from the flat tube row have a relatively larger wall thickness, in particular continuously, as other flat tubes in the areas 42 . 43 , This can be provided, for example, if no supporting means are provided on corresponding outer sides of the stack of flat tubes.

The in the 4a to 4d shown design of a flat tube 5 is different from the 3a to 3d shown design of a flat tube 5 essentially in that in addition in the channels 23 and 24 each a supporting webs 44 respectively. 45 is provided, which increases the stiffness. It is provided in the embodiment that these support webs 44 respectively. 45 longitudinal 25 of the flat tube 21 is provided throughout, so that by means of these support webs 44 . 45 the flow channels 23 . 24 each divided into two subchannels. The number of support bars 44 . 45 can also be varied.

Used in a design according to the 2a to 2f become the coolant channels 23 , on the one hand, and 24 , on the other hand, flows in opposite directions of coolant, so that through one of these coolant channels 23 . 24 Coolant from the coolant box 2 in the coolant box 3 flows through and through the other of these coolant channels 23 . 24 Coolant from the coolant box 3 in the coolant box 2 flows.

In the case of the 2a to 2f explained radiator, in particular a soldered radiator 1 is, for example, the flat tubes 5 according to the 3a to 3d or according to the basis of 4a to 4d be designed explained design. The basis 3a to 3d or on the basis of 4a to 4d explained flat tubes 5 However, they can also be provided in differently designed radiators.

While with the from the state of the art known configurations, the wall thickness design are designed for the highest stress and the remaining parts of the walls are oversized, can - as the embodiment shows - according to the invention, for example, provided that extruded flat tubes are used with special design of the flat tube wall thickness (see. 3a to 4d ), where the highly stressed areas have a significantly higher wall thickness than less stressed areas. This can be achieved in total a saving of material and / or weight and a high-quality and process-reliable product.

Further must in the design according to the embodiment the soldering the bead is no longer guaranteed become - what in the prior art is required - since this already in the extrusion process can be formed or trained. In the prior art is inevitable an elevated one Material use and an increased Cost situation given, at least through the designs according to the embodiments to avoid the invention.

As mentioned, the show 3a to 3d a flat tube 5 that can be used in the radiator area and has different wall thicknesses. By additional bars 44 . 45 on the inside can - as in particular 4c shows - the stiffness can be increased or increased further.

The beads 32 . 33 can in the designs according to the 3a to 3d respectively. 4a to 4d Alternatively, for example, be shaped as it is in 5f is shown. Thus, they can each be substantially V-shaped, in particular in cross-section, the tip of the "V" and the ends opposite the tip of the "V" being rounded or curved.

As the embodiment clarified, can with a design according to the invention a low weight and better results with internal pressure loads be achieved.

Of the Use of extruded flat tubes in radiators can also be reduced Investment costs for lead the machine park. It is possible, at constant outer geometry the flat tubes to realize different internal geometries to different Requirements to be able to react easily. This can be, for example be so that different types of vehicles, such as cars and commercial vehicles or for various Motor vehicle engines at the radiators in question flat tubes used, each having the same outer geometry. The Inner geometry can be adapted to the specific application adapted adapted, which can be well realized in the extrusion process.

consequently can Investment costs for additional or many role sets in special applications, such as for application in the commercial vehicle area for a radiator with high internal pressure stress.

It should be noted is self-evident also embodiments fall under the invention, in which the advantages mentioned are not or only partially given. The mentioned advantages are that is, those that the invention, at least in preferred development allows.

1

radiator

2

upper Coolant tank

2a

Lid of 2

2 B

Tube sheet of 2

3

lower Coolant tank

3a

Lid of 3

3b

Tube sheet of 3

4

heat exchanger network or tube-rib block

5

flat tube

6

corrugated fin

7

partition wall

8th

Coolant inlet chamber of 2

9

Coolant outlet chamber of 2

10

Opening in 8th

11

Opening in 9

12

separation

20

Area

21

Flat tube wall

22

Inside of 5

23

Channel for coolant from 5

24

Channel for coolant from 5

25

Flat tube longitudinal axis

26

greater wall thickness

27

greater wall thickness

28

greater wall thickness

29

greater wall thickness

30

smaller Wall thickness

31

smaller Wall thickness

32

Beading

33

Beading

34

Wall section of 21

35

Wall section of 21

36

Flat tube width or width direction of 21

37

Flat tube width or width direction of 21

38

first end of 5

39

second end of 5

40

first 32 . 33 adjacent area

41

second on 32 . 33 adjacent area

42

Intermediate area between 38 . 40

43

Intermediate area between 41 . 39

44

supporting web

45

supporting web

50

flat tube

52

Longitudinal axis or longitudinal direction of 50

54

Area

56

Flat tube wall

58

channel from 50

60

channel from 50

62

Beading

64

Beading

66

arrow

68

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Claims (17)

Radiator for a cooling circuit of an air or water side controlled air conditioning system of a motor vehicle, wherein the radiator ( 1 ) a plurality of coolant flow-through flat tubes ( 5 ), each for the limitation of at least one in the Flachrohrinneren ( 22 ) extending channel ( 23 . 24 ) a flat tube wall ( 21 ), characterized in that the flat tube wall ( 21 ) at least one of the flat tubes ( 5 ) different wall thicknesses ( 26 ; 27 . 28 . 29 . 30 . 31 ) having. Radiator for a cooling circuit of an air or water side controlled air conditioning system of a motor vehicle, wherein the radiator ( 1 ) a plurality of coolant flow-through flat tubes ( 5 ), each for the limitation of at least one in the Flachrohrinneren ( 22 ) extending channel ( 23 . 24 ) a flat tube wall ( 21 ), in particular according to claim 1, characterized in that the flat tubes ( 5 ) extruded flat tubes ( 5 ) are. Radiator according to one of the preceding claims, characterized in that the flat tube wall ( 21 ) at least one of the flat tubes ( 5 ) in at least one transverse or perpendicular to the flat tube longitudinal axis ( 25 ) located cross-section different wall thicknesses ( 26 . 27 . 28 . 29 . 30 . 31 ) having. Radiator according to one of the preceding claims, characterized in that the ratio of the maximum wall thickness to the minimum wall thickness of the at least one, different wall thicknesses having flat tube ( 5 ) is greater than 1.1. Radiator according to one of the preceding claims, characterized in that the wall thicknesses ( 26 . 27 . 28 . 29 . 30 . 31 ) of the at least one different wall thicknesses ( 26 . 27 . 28 . 29 . 30 . 31 ) having flat tube ( 5 ) at least qualitatively to the voltage conditions in the flat tube wall occurring during operation and when used in a cooling circuit of an air-conditioning or water-side controlled air conditioning system of a motor vehicle (US Pat. 21 ) are adjusted. Radiator according to one of the preceding claims, characterized in that the radiator ( 5 ) at least one coolant box ( 2 . 3 ), in which the flat tubes ( 5 ) with at least one of their ends. Radiator according to one of the preceding claims, characterized in that at least one coolant box ( 2 ) at least one partition wall ( 7 ), by means of which the interior of this coolant box ( 2 ) into separate sub-chambers ( 8th . 9 ) is divided. Radiator according to one of the preceding claims, characterized in that the at least one, different wall thicknesses ( 26 . 7 . 28 . 29 . 30 . 31 ) having flat tube ( 5 ) in transverse or perpendicular to its longitudinal axis ( 25 ) considered cross-section at least one bead ( 32 . 33 ) having. Radiator according to claim 8, characterized in that the flat tube wall ( 21 ) of the at least one, different wall thicknesses having flat tube ( 5 ) in transverse or perpendicular to its longitudinal axis ( 25 ) viewed cross-section of two gegenüberlie gene wall sections ( 34 . 35 ) one bead each ( 32 . 33 ), these opposing wall sections ( 34 . 35 ) with the formation of separate flow channels ( 23 . 24 ) abut each other for the coolant. Radiator according to one of claims 7 to 9, characterized in that the partition ( 7 ) Slots, in each of which a flat tube ( 5 ) with one in its longitudinal direction ( 25 ) end is inserted, wherein the respective flat tube ( 5 ) of the respective slot in the transverse or perpendicular to the longitudinal axis ( 25 ) of the flat tube ( 5 ) is encompassed from the outside, in such a way that at least one slot limiting portion of the partition ( 7 ) in a bead ( 32 . 33 ) of the flat tube ( 5 ) intervenes. Radiator according to one of the preceding claims, characterized in that the radiator ( 1 ) at least one row of stacked flat tubes ( 5 ), wherein the respective adjacent flat tubes ( 5 ) are arranged spaced from each other and in the intermediate spaces formed between each adjacent flat tubes ( 5 ) Corrugated ribs ( 6 ) are provided for an air flow. Radiator according to one of the preceding claims, characterized in that the at least one, different wall thicknesses ( 26 . 27 . 28 . 29 . 30 . 31 ) having flat tube ( 1 ) one or more support webs ( 44 . 45 ), which in the interior ( 22 ) of the flat tube ( 1 ) against Overlying wall sections of the flat tube wall ( 21 ). Radiator according to one of the preceding claims, characterized in that the at least one different wall thicknesses having flat tube ( 5 ) at least one bead ( 32 . 33 ), wherein the wall thickness of the flat tube wall ( 21 ) in the transverse or perpendicular to the longitudinal axis ( 25 ) of the flat tube ( 5 ) considered cross section in the width direction ( 36 ) ( 38 . 39 ) and in which, in particular on both sides, to the at least one bead ( 32 . 33 ) subsequent areas ( 40 . 41 ) and / or in the area of the bead ( 32 . 33 ) is larger than in the areas ( 42 . 43 ) extending in the width direction ( 36 ) seen in the width direction ( 36 ) ( 38 . 39 ), and / or is greater than in the areas ( 42 . 43 ) extending in the width direction ( 36 ) seen at the at least one bead ( 32 . 33 ) subsequent areas ( 40 . 41 ) connect. Radiator according to one of the preceding claims, characterized in that all flat tubes ( 5 ) of the radiator ( 1 ) are designed substantially identical. Air conditioner for an air conditioning system of a motor vehicle with a suction device for sucking in air, with an air discharge device for the output of air, with a vaporizable by sucked air evaporator and with a sucked air through radiator ( 1 ), characterized in that the radiator ( 1 ) is formed according to one of the preceding claims. Cooling circuit for an air- or water-side controlled air conditioning system of a motor vehicle, characterized in that in this cooling circuit a radiator ( 1 ) is integrated, which a plurality of the coolant of the cooling circuit can be flowed through flat tubes ( 1 ), characterized in that the radiator ( 1 ) is formed according to one of claims 1 to 14. Air conditioning system for a motor vehicle, characterized in that this air conditioning system is a radiator ( 1 ) according to any one of claims 1 to 14 and / or an air conditioner according to claim 15 and / or a cooling circuit according to claim 16.