Coolable arrangement

The invention relates to a coolable flowed through Housing having projecting into the cross section cooling fins.

Such known from DE-OS 30 41 656 known housing has the disadvantages that it is compared to a Cross section only a relatively small space for comprises receiving electronic components and that the Cooling air does not flow therethrough unimpeded but flows rather against a baffle plate.

is from DE-GM 85 09 176, an air heat exchanger known in which, although the transistors in the interior of are arranged heat exchanger, however, the electrical Connections are made on the outer side, so that there the rest unprotected electrical wiring must be carried out.

Electrical and electronic elements produce in Operating heat. The denser electronic circuits are packed, the more important is the cooling. This applies particularly to circuit arrangements in Cases or cabinets along with other electronic Assemblies are arranged, and in particular for Circuit arrangements, the power semiconductor contain.

The miniaturization of electronic components and Circuits increases, however, by the problem of Heat dissipation is limited. with increasing Miniaturization cover the cost of the electronics but constantly decreasing, but increasing the relative Share the costs of the necessary mechanical components.

To a large number of power semiconductors, which in Power supplies are included to cool, used one so-called fan aggregates. Such units consist of a cooling tube with inwardly projecting ribs about the entire cross section of the cavity extend through is blown by a fan the cooling air. At the outside of this cooling pipe are thermally conductive connected thereto, disposed plates on which the Electronics are mounted with the power transistors.

Object of the present invention is to provide a housing of the aforementioned type to create, the is inexpensive to produce, has a simple design, and with small dimensions a good cooling of the Components or assemblies ensures.

This object is achieved by the features of claim 1 dissolved.

The invention has a surprising variety of Advantages:

First, the advantage is to be mentioned that to cooling components or assemblies, because they in themselves the cooling pipe are made directly by the cooling air are blown and cooled directly from this. These direct cooling provides for additional cooling cooling that is caused by the heat dissipation via the cooling fins, the heat-conducting manner to the Cooling pipe is connected.

Another advantage is the fact that all electrical components and assemblies to VDE regulations are protected against contact.

The invention further has the advantage that a consisting of cooling pipe, fan and electronics Arrangement much more compact than previously is assembled, as for being cooled electronics no additional space outside the cooling tube is required. This enormous space saving was characterized allowing the electronics in the previously Interior only used for cooling fins Cooling tube is housed. The electronics requires thus no additional volume.

In this context it should be noted that when the previously known assemblies, the arrangement of the Plates connected thermally conductively with the cooling tube were taking an additional volume and thereby the size of the entire assembly significantly codetermination.

Further, it should be noted that in some known cooling aggregates actually the entire Internal cross-section of generally circular cooling tube was interspersed with cooling fins. It was also necessary because a large surface area of ​​fins required was because the heat only from the power electronics via the externally mounted on the cooling tube plates on the Cooling tube, and from there to the cooling fins and could be delivered from these to the cooling air. According to the present Erfndung but is less Cooling rib surface necessary than before, because the Power electronics not only heat dissipation the cooling tube and the cooling fins is carried out, but the Power electronics rather directly in cooling Airflow is.

The invention thus has the further advantage that it allows a considerable saving of material, because, due to the cooling of the directly occurring Power electronics, less fin surface and less cooling fins volume is required.

However, the invention also enables more of a other reason a considerable material savings. In some of the known cooling aggregates is a very long Heat dissipating path with a plurality of transitions from one Body required for others. First, the heat must by producing them power electronics on the Mounting plates are transferred. From there they have to the circular cooling tube are transferred. If, in the Heat dissipation to heat build arise must therefore at each transition from one heat-dissipating Body for nights dissipating body much thermally conductive material may be provided.

According to the present invention is the Heat conduction from the heat generating Electronics to the cooling fins considerably shorter, so that for this reason less thermally conductive material is required.

Then there is the advantage that only a single Heat transfer, namely, by the power electronics in the Cooling tube directly to the wall of the cooling tube is required. This eliminates a Heat transfer threshold, which in turn is a substantial Material savings.

With any material saving, the cost of Producing significantly reduced, which especially with Mass products is crucial.

However, the invention has still a very significant and surprising further advantage:

By integrating combination of cooling pipe and Power electronics is the hitherto always only Cooling pipe used simultaneously to up External impacts protective casing. This is on the one hand, the advantage obtained that the electronics at the inventive device automatically protected is. Then there is the great advantage that the otherwise necessary additional costs for an outer housing . omitted This fact enables further considerable cost savings.

The invention thus in combined manner with synergistic effect an integrated unit created, which compared with the prior art has many advantages.

According to a development of the invention is at least one of the inner wall of an area for mounting a enhancing the heat conduction to the fan housing The mounting base is provided. This mounting surface preferably designed plan. This development of the Invention enables integrated construction also very strong power semiconductor with consistently small cross-section of the building module.

The cooling fins are expediently according to the knock out the electronics to be used Cross section are formed. Thereby, a high Degree of freedom of design options electronic assemblies which are arranged cooled are to be achieved.

The housing may be formed in cross-section is rectangular be. This development of the invention is therefore advantageous because most fans in rectangular or square shape are formed. These Training form thus enables a particularly simple Mounting the fan on or in the housing of the integrated Unit.

The housing may consist of several parts. A Such an embodiment is simpler tools manufactured as an integrally formed housing with protruding inward fins.

Conveniently, the housing consists of two halves. This development of the invention makes it possible to Manufacture with simple tools and keeps at the same time the cost for the assembly of the housing low.

According to a preferred embodiment of the invention is each housing half in cross section, approximately U-shaped formed, the cooling fins extending from the middle or connecting portion parallel to the Legs extend. This development of the invention facilitates assembly of the shroud by the two halves each with mutually facing legs be mounted, wherein the one leg of a Half partly directly on the surface of it associated leg of the other cooling housing half bears.

is one of the two legs of the housing halves preferably on a part of its height by about his Width towards the outside of the complete is formed offset housing inwardly. These Development of the invention allows two produce identical housing halves, the outside of the Leg sides have a smooth surface. The Invention opens up the possibility of both produce housing halves with the same tool, which in turn a significant cost advantage in the Production is achieved.

According to a preferred embodiment of the invention has one of the two legs of the housing on a Part of its height has a reduced thickness, so that at his investment and the connecting portion adjacent area, a protrusion is formed. Will both cooling housing halves together, thus forming the Projection simultaneously a stop. This as Stop operating projection is expediently so dimensioned so that its surface is flush with the Outer surface of the abutting him the leg opposite case half closes. Thereby can be cooled and simultaneously protective housing formed with a consistently smooth surface will.

In a development of the invention it is also provided that in the Legs at least one cooling housing half Transverse slots or rows of holes are formed. In this can put screws in transverse slots or holes the legs of the other housing half stuck. This development of the invention allows, the two housing halves with different, adjustable distance and thus with different large Interior together to form a cooling and protecting case reassemble.

The housing halves can be produced as an extruded profile be.

The housing may at its end faces to the holes have fastening of front panel and fan. The latter need then only be screwed, which in turn reduces the manufacturing cost.

According to a preferred embodiment of the invention the housing as an independent structural module, particularly as a so-called 19-inch supply bay is suitably designed for eurocards Magazine.

According to a development of the invention, the housing may at its upper side and / or the bottom projecting lugs for engagement in have the grooves of Europe card magazines.

Another embodiment of the invention also comprises flow-through coolable Housing in which the assembly by a computer controlled electronic rheostat is.

The invention is, by way of Embodiment, and in combination with the described drawings. In detail shows

<b>Fig.</b> 1 a cross section through a coolable flowed through housing,

<b>Fig.</b> 2 is a schematic representation of a part a Europe magazine,

<b>Fig.</b> 3 is a schematic cross-section through a coolable flowed through housing with therein integrated electronic Circuit, and

<b>Fig.</b> 4 an integrated according to an embodiment of the invention built electronic Sliding resistance, and

<b>Fig.</b> 5 is a perspective view of a Housing half.

The <b>Fig.</b> 1 shows a coolable housing flowed through the identical of two housing halves <b>22</b> consists. Each housing half has an angled, approximately U-shaped cross section, having two limbs <b>24</b> and <b>26</b> and an intermediate or connecting portion <b>28</b>, From the connecting portion <b>28</b> are cooling fins <b>30</b> to the Interior from the combination housing. The ribs are dimensioned, the interior of the housing that they space Assembly of electronic components or assemblies free leave.

With regard to the out of the <b>Fig.</b> 1 apparent relative short length of the cooling fins, note the following:

Since the electronics used directly in interior the housing is provided with means of a fan cooling air flowing through it, the electronics not only by heat dissipation but also directly through which they cooled air flowing around. Therefore, in This cooling / protective housing combination less Fin surface than in the known aggregates necessary. In other words, relatively short cooling fins and accommodation of electronic components allow themselves each other. Since the electronics directly in the airstream is arranged, is shorter or less Fin an equal cooling achieved. On the other hand, it is only because of the shorter cooling fins possible the electronics accommodated in the cooling tube.

How in this figure further provides, is a leg <b>26</b> beyond the portion <b>27</b> narrow formed so that between at the junction <b>26</b> and <b>27</b> a step <b>29</b> arises. The stage<b>29</b> also serves as an end stop for the leg <b>24</b> of the opposite case half <b>22</b>, The outside of the section <b>27</b> the one housing half <b>22</b> and the Outside of the leg <b>24</b> the opposite housing half <b>22</b> thus forming a continuous smooth Housing exterior.

are in the end faces of the housing halves screw grooves <b>34</b> provided that an easy assembly permit from fans, front panel, or the like. The Front panel, not shown, is expediently arranged at a distance from the housing halves, so that a high air flow can be achieved.

Furthermore, even on noses <b>32</b> noted that for Guide the module during insertion in a card magazine, this in <b>Fig.</b> 3 is schematically shown as a guide serve.

In the side walls of the housing halves are Mutternuten <b>36</b> formed which, for connection to other adjacent components are used.

It should be noted that this embodiment the invention, the manufacture of the housing halves as Extruded profiles in a single operation enables including the formation of the ribs and the grooves. A post-processing is not necessary, whereby the manufacturing costs considerably Reduction will.

The <b>Fig.</b> 2 shows a schematic indication Cards magazine with in the usual width division, Eurocards magazines is a division unit Multiples of 5.08 mm, rails <b>42</b> contains. These Rails are below the upper edge and above the Lower edge of the magazine from front to back arranged to run. They have their inside guide <b>44</b> on which to guide slots serve.

The noses <b>32</b> the housing halves <b>22</b> are sized that it in the grooves <b>44</b> engage the magazine rails can and the module upon insertion into the magazine lead and against lateral displacement to back up.

The <b>Fig.</b> 3 shows a coolable casing in simplified schematic way with inserted Electronics.

On the inner sides of the upper and lower Housing wall are cooling pads <b>35</b> arranged which thermally conductive with a mounting plate <b>37</b> are connected, are mounted on the electronic components. Also the clogs <b>35</b> practice multiple functions simultaneously. To the First, they serve to dissipate heat from the mounting plate <b>37</b> to the housing and the cooling fins <b>30</b>, Secondly, are the mounting of the pads <b>35</b> at the legs <b>26</b> the two are each partially covering legs <b>24, 26</b> two along a Housing forming housing halves <b>22</b> firmly together connected. The attachment of these cooling pads<b>35</b> causes thus at the same time the final assembly of the housing module.

The fan itself is not shown in the figures, since its arrangement for the average skilled person further explanation is possible.

The length or depth of the housing halves is determined after using the form. You may equal to the depth of his card magazine or even just a part of this be depth.

The <b>Fig.</b> 4 shows a perspective view of a electronic sliding resistance for example by computer controlled. This Sliding resistance is in a housing module <b>22</b> integrated. The front panel<b>46</b> is spaced from the arranged housing module, thereby providing a high Air flow through the same protective and as Cooling pipe serving housing <b>22</b> is achieved.

The <b>Fig.</b> 5 shows a perspective view of a housing half <b>22</b>, Like parts in this<b>Fig.</b> 5 bear the same reference numerals as in the preceding figures. A detailed description this in <b>Fig.</b> 5 housing half illustrated unnecessary therefore.