EP2193322A2

EP2193322A2 - Plate cooler for fluids

Info

Publication number: EP2193322A2
Application number: EP08782792A
Authority: EP
Inventors: Philipp Pustelnik; Thomas Euler-Rolle
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-08-21
Filing date: 2008-07-15
Publication date: 2010-06-09
Also published as: AT505413B1; AT505413A4; WO2009023883A2; WO2009023883A3

Abstract

A plate cooler for fluids, particularly for hydraulic oil, comprising a substantially parallelepiped assembly made of spaced plate-shaped elements formed by an extruded profile (1), in which fluid channels (1') run parallel to one another separated by ribs, wherein air-guiding channels (6) are interposed between adjoining extruded profiles and the fluid channels at the ends are connected to fluid supply and distribution elements and fluid collection and discharge elements, which in turn are provided with fluid supply and discharge connections, and wherein the extruded profiles at the ends are held at a distance from each other by hollow spacer blocks (2) corresponding to the air-guiding height, said blocks comprising a section of a hollow chamber extruded profile and at the same time forming the fluid supply and collection elements, wherein in the region of the spacer blocks in each extruded profile a recess extending substantially across the width thereof is formed.

Description

Plate cooler for liquids

The invention relates to a plate cooler for liquids, in particular for hydraulic oil, having a substantially parallelepipedic packet of spaced plate-shaped elements which are each formed by an extruded profile, in which liquid channels separated by webs parallel to each other, wherein between adjacent extruded Air ducts are interposed and the liquid channels end with liquid Zuführ- and -Verteilelemente and fluid collection and -abführelementen in combination.

In known plate coolers of this type (AT 402 235 B) so-called distributor boxes are provided at the ends of the liquid channels, which extend over the entire length of the radiator and have the task to distribute the inflowing or outflowing liquid uniformly on the liquid channels or from these record and make the connections to the supply and discharge lines. Such distribution boxes are relatively bulky and space-consuming and make the assembly of the cooler complicated because they must be welded in a separate step.

The invention aims to provide a liquid cooler of the type described in the introduction, which manages without the distribution boxes provided up to now.

The liquid cooler according to the invention is characterized in that the extruded profiles are held at their ends by hollow spacer blocks corresponding to the air duct channel height, which consist of sections of a hollow chamber extruded profile and at the same time form the liquid supply and collection elements Area of the spacer blocks in each extruded profile is essentially a chen over the width of which extending recess is formed.

Alternatively, each extrusion is provided at its top and bottom with a closure cap which is spaced from the ends of the fluid channels. According to another feature of the invention, the extrusions are closed at the ends and the ends of the webs cut away to establish a flow connection between all the channels.

Another object of the invention is a Plattenküh- ler of the introductory type, which is characterized in that in the package, the extruded sections are connected to each other by spacer blocks, which consist of sections of an extruded hollow section and at the same time form the Flüssigkeitszuführ- and -Sammelelemente , And that the air ducts in the space defined by the spacer blocks between the extruded parallel to the liquid channels, so that the air is guided in countercurrent or direct current to the liquid.

This design allows in addition to the elimination of the distribution boxes advantageously an air duct after the

DC or countercurrent principle, because the air inlet and outlet takes place on the front sides of the radiator and not as previously from the radiator side walls ago. Preferably, the air ducts are formed by soldered to the extruded profiles perpendicular to these individual slats.

The invention and further features thereof are explained in more detail below on embodiments of a hydraulic oil cooler with reference to the drawings. 1 is a side view of a cooler according to the invention, FIG. 2 is an end view of the cooler, Fig. 3 is a section along the line 3-3 in Fig. 1, Fig. 4 is a section along the line 4-4 in Fig. 1, Fig. 5 is a section along the line 5-5 in Fig. 1, Fig. 6 shows a detail 6-6 of Fig. 5, Fig. 7 shows a detail 7-7 of Fig. 3, Fig. 8 is a section along the line 8-8 in Fig. 1, Fig. 9 is a view of a second embodiment of the invention, Fig. 10 is a section along the line 10-10 in Fig. 9 11 shows another cooler embodiment according to the invention in side view, FIG. 12 shows a section along the line 12-12 in FIG. 11, FIG. 13 shows another development of the cooler in side view, FIG. 14 shows a section along the line Fig. 15 is an end view of the cooler of Fig. 13, Fig. 16 is a section along the line 16-16 in Fig. 15, Fig. 17 is a detail of Fig. 16, Fig. 18 a 19 shows a section along the line 19-19 in FIG. 18, FIG. 20 shows an end view of the cooler according to FIG. 18, FIG. 21 shows a section along the line 21-21 in FIG. 20, and FIG. 22 shows a detail from FIG. 21, FIG. 23 shows a fifth embodiment of the cooler in a side view, FIG. 24 shows a section along line 24-24 in FIG. 23, FIG End view of the cooler according to Fig. 24, Fig. 26 is a section along the line 26-26 in Fig. 25, Fig. 27 is a detail of Fig. 26, Fig. 28 is a development of the invention in plan view, Fig. 29 is a side view 30 is a section along the line 30-30 in FIG. 28, FIG. 31 is a section along the line 31-31 in FIG. 29, FIG. 32 is a detail from FIG. 31, FIG 33 shows a side view of the cooler, FIG. 34 shows another cooler embodiment according to the invention in plan view, FIG. 35 shows a side view of the cooler according to FIG. 34, FIG. 36 shows a section along the line 36-36 in FIG. Fig. 37 is a section along the line 37-37 in Fig. 35, Fig. 38 is a detail of Fig. 37, and Fig. 39 is a side view of the radiator. The plate cooler according to the invention is constructed essentially of extruded aluminum or an aluminum alloy. As shown in FIG. 1, flat extruded profiles 1 are spaced apart by spacer blocks 2 held, which are cut from a hollow chamber extrusion. Each extruded section 1 has a series of adjacent oil channels I ¹ , which are separated from one another by webs 1 "and are provided with ribs projecting from the profile walls.

As shown in FIG. 7, each spacer block 2 is provided with a central cylindrical channel 2 ', via which the oil is distributed to all oil channels 1' of an extruded profile 1. In order to ensure a uniform distribution of the oil from the spacer block 2 to all oil passages 1 ', a central passage 3 is formed in the extrusion 1 as shown in FIG. 8, of which four fingers 3' in the example shown up to the edges of the extruded section. 1 extend.

In the space defined by the spacer blocks 2 space 5 be- seen adjacent extruded lamellae 1 meandering 6 are housed which define air guide ducts 6 'for cooling, which extend perpendicular to the channels I oil. ¹

In operation, the hot hydraulic oil flows through a frontal inlet 7 in the example shown in the channels of the spacer blocks 2 and through this in the oil passages 1 'of the individual extruded 1. The cooling air flows in the air fins perpendicular to the oil passages. From the also frontal outlet 8, the cooled oil flows back into the oil circuit. According to a second embodiment of the invention (Figs. 9, 10), the oil channels 1 are provided at the end with a cap 4, the distance from the ends of the oil channels I ¹ has to distribute the oil evenly on all channels 1 'of an extruded 1.

11 and 12 show an embodiment with a closed Endendreßprofil 1 and a cut end web portion 1 '"between the oil passages 1', which ensures a uniform oil distribution. 13-17 show a further embodiment in which the extruded sections 1 cut out at the ends with respect to the webs 1 'are provided with a common cover plate 9. In the embodiment according to Figs 18-22, the side walls of the extruded sections 1 become at the ends 1 ^IV squeezed and tightly welded to close the profile, for example by means of the CMT process (CoId Metal Transfer).

Another embodiment is shown in Figs. 23-27, wherein between the deformed side walls of the extruded an insert 10 made of plastic or metal is provided, which is mechanically fixed.

In the alternative embodiment shown in FIG. 28, the hydraulic oil cooler formed of aluminum or aluminum alloy has a parallelepipedic package of extruded sections 1 and spacer blocks 2 disposed between a first end plate 9 and a second end plate 10. Each spacer block 2 is in the illustrated example, a portion of a cylindrical extruded aluminum tube and is arranged as shown in FIG. 28 between two spaced Extrusions 1, which have bores in the region of the spacer blocks, via which the oil in the oil passages 1 ^■ enter the extruded section 1 and can escape from these. The air ducts 6 "are parallel to the oil passages 1 ', the air inlet and outlet being via the upper and lower end faces of the radiator, the front and rear sides of which are closed Spacer blocks 2. The air ducts 6 "may be formed by meandering fins or as fins 11 formed integrally with the extruded profiles.

The air flows in the cooler of Fig. 28ff in countercurrent or direct current to the oil in the oil passages 1 '. The individual parts of the cooler consist in the context of the invention of coated aluminum or an aluminum alloy and are welded or soldered to the package, preferably by applying aluminum solder in Flammsprühver- and / or by rolling, whereby the plate cooler high mechanical and hydraulic loads, Resistances and vibrations resists.

It is understood that the invention relates to the structural design of the extruded sections, in particular as regards the arrangement of inlet and outlet for the liquid in the cooler, which does not necessarily have to be provided on the front side, as regards the distribution of the liquid to all the profile channels, as well With regard to the cross-sectional formation of the spacers can be varied variously.

Claims

Claims:

1. plate cooler for liquids, in particular for hydraulic oil, with a substantially parallelepipedic packet of spaced plate-shaped elements, each by an extruded profile (1) are formed, in which liquid channels (I ¹ ) separated by webs from each other parallel to each other, wherein between adjacent Extrusion profiles air ducts (6) are interposed and the liquid channels end with liquid supply and -Verteilelemente and liquid collecting and -abführelemen- th in conjunction, which in turn are provided with Flüssigkeitszu- and -ableitungsanschlüssen, characterized in that the extruded profiles (1) corresponding hollow spacer blocks (2) are held at a distance from each other by the air duct edge height, which consist of a portion of a hollow chamber extrusion and at the same time form the Flüssigkeitszuführ- and -sammelelemente, wherein in the area the spacer blocks (2) in each extruded profile (1) is formed over a substantially extending width of its recess.

2. Plate cooler according to claim 1, characterized in that each extruded profile (1) is provided at its top and bottom with a closure cap (4), the distance from the inlet ends of the fluid channels (I ¹ ).

3. Plate cooler according to claim 1, characterized in that the extruded profiles (1) are closed at the end and the ends of the webs (2 ") are cut away, in order to produce a flow connection between all channels (I ¹ ).

4. Plate cooler according to claim 1, characterized in that the extruded profiles (1) have at their ends sealingly pressed against each other side walls.

5. Plate cooler according to claim 1, characterized in that the side walls of the extruded profiles (1) are provided at the end with a closure plug (10) which is sealingly fixed by squeezing the profile side walls.

6. Plate cooler for liquids, in particular for hydraulic oil, with a substantially parallelepipedic packet of spaced plate-shaped elements, each formed by an extruded, in which liquid channels separated by webs from each other parallel zueinan- run, wherein between adjacent extruded air ducts are interposed and the liquid channels are connected at the end to liquid supply and distribution elements as well as liquid collection and removal elements, which in turn are provided with liquid supply and discharge connections, characterized in that the extruded profiles (1) are connected to one another at the end by spacer blocks (2) are connected, which consist of sections of an extruded hollow profile and at the same time form the Flüssigkeitszuführ- and -sammelelemente, and that the Luftführungs- channels (6 ") in the spaces defined by the spacer blocks (2) between Chen the extruded (1) run parallel to the liquid channels, so that the air is passed in countercurrent or direct current to the liquid.

7. plate cooler according to claim 6, characterized marked, that the spacer blocks (2) are formed circular cylindrical.

8. plate cooler according to claim 6 or 7, characterized in that the air ducts (6) are formed by meandering formed fins.

9. plate cooler according to claim 6 or I _1, characterized in that the air ducts (6) by integrally formed with the extruded sections (1), perpendicular to these extending slats (11) are formed.