DE102006057796A1 - Electrical device e.g. inverter, for switchboard, has cooling device to remove heat and including air cooler, in which liquid cooler is mounted, where air cooler is provided between liquid cooler and components e.g. power semiconductors - Google Patents

Abstract

The device has heat producing components e.g. power semiconductors, and a cooling device to remove heat which is produced by the components. The cooling device consists of an air cooler, in which a liquid cooler is mounted, and the air cooler is provided between the liquid cooler and the components. The air cooler has a cooling body, which includes cooling ribs (5) and/or finger for heat dissipation to on-rushing air and a mechanical interface for detachable connection with the liquid cooler. The components are connected on a base plate (6) that is formed one piece with the body. Independent claims are also included for the following: (1) a series of electrical devices (2) a device with a housing part, which encloses a space region within which heat producing electrical devices are arranged (3) a method for cooling an inverter.

Description

The Invention relates to a device a series of devices, a device with housing parts, a Method, use of an air cooler and use of a Chiller.

From the DE 198 47 789 is a converter known as a device with air cooler. In this case, the running as an air cooler cooling device on cooling fins. The performance of the device is limited by the heat dissipation performance of the cooling device.

From the DE 102 36 525 A1 a valve component set is known in which IGBT modules and capacitors are electrically conductively connected via a rail system, wherein the IGBT modules are mounted together with heating elements on a heat sink having ribs, where air flows past for cooling.

From the DE 202 00 484 U1 a cooling device for components is known in which a flow-through of a coolant heat exchanger is provided from the DE 43 22 647 A1 is known a heat sink, which is created from two profiles that mesh in a comb-like manner.

From the DE 20 2004 017 950 U1 a mounting plate for electronic components is known, which comprises a cooling body through which flows through the cooling body, wherein a nut for forming a screw with an electronic component against rotation in a extending on the heat sink fastening device is inserted.

From the DE 199 08 160 A1 For example, an electronic assembly arrangement is known, which comprises a processor and a power supply module, which are held together by a common carrier, to which a fan can be mounted.

Of the Invention is based on the object, a series of devices with to develop high power density but low costs.

According to the invention Task with the electrical device according to claim 1, in the series according to claim 25, in the apparatus according to claim 28, wherein the method according to that in claim 30 and in use as claimed in claim 33, Claim 34 and claimed in claim 36 features.

Important Features are in the invention of an electrical device, that heat generating electrical components, in particular power semiconductors, and a cooling device to dissipate this heat are included, wherein the cooling device from an air cooler is formed, mounted on the a liquid cooler is and where the air cooler between the liquid cooler and the heat is provided generating electrical components. important characteristics of the invention in the device in addition, that the device Heat generating components and a cooling device to dissipate this heat comprising, wherein the cooling device optionally air or liquid operations, such as for example, water-operated, is executed. Examples of heat-producing Components are power semiconductors, resistors, especially braking resistors, and other electronic components with great heat development, for example Do the washing up. An advantage of the invention is that the device is smaller Power requirement without water cooling and high power with additional simultaneous water cooling is equipable. Thus, within a series is a basic variant and an additional variant can be produced. It is, so to speak, a modular system achieved, depending on the application, so the system and its requirements to the device, a high performance can be delivered or the device operated air and / or liquid cooled is. As an example for liquid In the following, water is used.

Under water cooler is always read also liquid cooler and under air cooler always gas cooler.

In an advantageous development of the Lüftkühler comprises a heat sink, the ribs and / or fingers for heat dissipation to passing air, and the heat-generating electrical components are connected to, in or on a base plate, in particular thermally conductive, wherein the base plate formed integrally with the heat sink and the heat sink has a mechanical interface for releasable connection to a liquid cooler. Thus, no heat transfer between two parts is necessary in the heat sink but the heat propagates within the one part, in particular into the cooling fingers or cooling fins. In the invention is now of particular advantage that the liquid cooler to the air cooler, comprising base plate and cooling fins, is connectable. Thus, therefore, three modes are possible: firstly air cooling with bare air cooler, secondly with connected water cooler cooling only by this and thirdly when connected water cooler cooling by air cooler and water cooler. In the second variant, heat is not released into the ambient air. The integral formation of base plate with heat sink has the added advantage over an interchangeability of air cooler against water cooler that a detachable interface or heat transfer point between heat-generating elektri or electronic components and air cooler is avoidable. As a result, the cooling capacity of the air cooler in operation without water cooler is significantly increased compared to an air cooler with such interface. In particular, the avoidance of interfaces or material limits particularly advantageous in improving the cooling performance of an air cooler, in which yes, the heat transfer to the ambient air is unfavorable.

at An advantageous embodiment is the base plate with the cooling fins or formed integrally with cold fingers is. It is essential that the heat sink is integrally formed and thus possible little, namely no, has heat transfer. So there are only heat transfer from the heat generating components to the air cooler available. With additionally mounted water cooler is also a heat transfer from the air cooler to water cooler available.

at An advantageous development comprises the mechanical interface a bottom plate for mounting the liquid cooler. In an advantageous Further education is mounted on the bottom plate a water cooler. Advantageous is about to define an easily manufacturable interface with a bottom plate is that a good heat transfer to the water cooler ensures, in particular by the formation of a flat contact surface, the sufficient strength for attachment of the radiator causes.

at According to an advantageous embodiment, a water cooler can be detachably connected to the heat sink. The advantage here is that optionally a water cooler additionally connectable is or not.

The Selection is dependent the requested power density for the device, ie power per volume of the device. The water cooling can additionally at the same time for air cooling operated, or it is operated only the water cooling. With additional water cooling is significantly more heat output dischargeable as with mere Air cooling.

at In an advantageous embodiment, the device comprises a Heat sink, the Ribs or fingers have to heat to passing air. The advantage here is that provided a large surface for the release of heat is and therefore the average temperature low in the heat sink is held.

at In an advantageous development, the water cooler comprises a Cool plate, formed in the parallel coolant channels are, preferably by connecting parts and / or end parts to a coolant channel system are connected, in particular wherein the coolant channels as a bore and / or as Groove are formed. Preferably, the water cooler is at least formed in three parts, with a cooler plate as the middle part is provided in the advantageous in a simple manufacturing process introduced parallel coolant channels are. The water cooler further includes connecting parts that connect these coolant channels and thus the water cooler for integration into a coolant circuit provide. These coolant channels are advantageous in series or parallel connectable. Also combinations are conceivable. In a further development, instead of the bores, other profile cross-sections, For example, square, providable, especially if the radiator plate is manufactured in a continuous casting process.

at In an advantageous development, the water cooler comprises a Cool plate, in the recesses for receiving and / or passing a cooling liquid are formed, wherein the bottom plate of the air cooler at least partially housing-forming for the Recesses is. The advantage here is that a simple production feasible is. Because elaborate holes are dispensable, but rather the Grooves produced as a die-cast. The grooves are advantageous arranged so that in idealization formed a planar graph becomes. Due to the direct contact between coolant and bottom plate of the air cooler is the heat flow from the heat generating components, ie the cooling performance, further improved.

at an advantageous development are instead of or in addition to the grooves recesses formed of other geometric shape, the suitable for receiving and passing coolant. Also In this case, a part of the bottom plate of the air cooler is at least partially housing-forming for the Recesses, and there are formed by mounting the water cooler coolant channels. Examples of alternative geometric shapes include circular recesses, rectangular recesses and irregular recesses with more or less strong ramifications.

at an advantageous development, the recesses of the radiator plate as a meandering groove formed in the side or in the rear wall of the radiator plate attached connection devices, in particular connecting pieces, for connection to a coolant system lead. A meandering groove advantageously causes a good heat transfer from the radiator plate to the coolant.

In an advantageous embodiment, the bottom plate on surveys, which are designed to match the recesses of the radiator plate, in particular for sealing completion of the off recesses and / or as a centering aid. The surveys advantageously cause a whirling up of the cooling liquid when flowing past and thus a good mixing of the cooling liquid. Thus, the heat absorption is improved by the cooling liquid and optimally utilized the cooling liquid.

at an advantageous development is the bottom plate over the cooling fins and / or cold fingers of the base plate formed spaced. It is advantageous that the cooling fins and / or cold fingers can be used in a second and third function, namely for heat connection and for the mechanical connection of a water cooler.

at An advantageous development are on the base plate of the heat sink on the one hand cooling fins and / or cold fingers formed and on the other hand, on the base plate, a bottom plate provided for establishing a connection with the bottom plate, wherein the bottom plate and the base plate are integrally formed. From The advantage here is that an alternative construction geometry is provided is, in which the bottom plate particularly robust with the base plate connected is. Thus, a secure attachment of the advantageous water cooler on the air cooler causes, and the cold fingers and / or cooling fins are mechanically relieved and advantageously filigree ausbildbar.

at An advantageous development is the base plate with the cooling fins or formed integrally with cold fingers. Thus, the heat transfer from the heat generating components to the cold fingers formed without avoidable material limits. General is one Advantage of the invention that dispenses with different material limits and yet a high variety of variants among the configurable ones coolers at relatively low Part cost is achieved. It is particularly advantageous that the cooling capacity by the modular design later, that is after Structure of the device, through a simple retrofit increase can.

at An advantageous development is between water cooler and Heatsink thermal grease or Heat conducting intended. The advantage here is that the heat transfer resistance can be reduced is. As materials here are preferably graphite or aluminum wax coating or the like called.

at An advantageous development is the mechanical interface and the means for connecting carried out such that water cooler and Heat sink on the contact surface substantially just adjoining are connectable. Thus, a particularly good heat transfer achieved, and it is provided a high cooling capacity.

at an advantageous embodiment, the mechanical interface and the means for connecting carried out such that the water cooler and heat sink the contact surface is essentially flat adjacent are connectable. The advantage here is that the heat transfer gaps, especially without air holes or the like, executable is.

at According to an advantageous development, the means for connecting Clamping elements. The advantage here is that a quick, simple Connecting the water cooler is vornehmbar. In particular, a pressing of the water cooler on allows the bottom plate of the heat sink. This pressing is doing so executed, that the clamping elements as possible even concern cause.

at An advantageous development is the heat sink and / or the radiator plate manufacturable as an extruded profile or die-cast. Thus, a simple one Production of the radiator plate and / or the heat sink feasible. Besides, they are along the cavities the drawing direction or pressing direction aligned and thus in this Direction of air and / or coolant flow through.

at According to an advantageous development, the cooling body comprises cooling ribs between a base plate and a bottom plate provided for connection to the water cooler is. The advantage here is that a compact design provided is. Furthermore is beneficial that the heat from the base plate over the cooling fins can be transported to the bottom plate and thereby either to the passing by the ribs Air can be delivered or further transported away from the bottom plate is touching by means of arranged water cooling, being in the area of touch Thermal Compounds is predictable.

alternative is the heat sink with cold fingers instead of cooling ribs fitted. An isotropic cooling capability is advantageous reachable, so it is not a preferred direction, especially for convective flowing cooling air available.

In an advantageous development, the cooling body comprises cooling ribs on a base plate, on which a bottom plate is attached or integrally formed, which is provided for connection to the water cooler. The advantage here is that the heat from the base plate on the cooling fins is transported to the air, the bottom plate is arranged laterally. Thus, other relative arrangements of the water cooler are possible. Another advantage is that an alternative construction geometry is provided in which the bottom plate does not affect the convection current of the air cooling. Thus, such a heat sink over a wide power range as an exclusive air cooler settable.

at In an advantageous embodiment, a fan for generating air flow along provided the ribs of the heat sink. The advantage here is that the heat transfer from the ribs to the flowing through Air can be improved in air cooled cooling mode. When used the water-cooling Operating mode is the warm ambient air passed by the ribs and gives her heat at these ribs, which the heat then to the even colder water cooler hand off.

at In an advantageous development, the device is in a closed space area provided so that heat from the air of the room area together with the heat of the room Components over the ribs and the water cooler dischargeable is. The advantage here is that the device can be used under conditions is where the device is surrounding air warmer is considered the ribs or at least an essential part of the ribs. Thus, the heat then transported to the bottom plate and from there to the water cooler.

at According to an advantageous development, further devices are arranged in the area of space, which have heat releasing components to the air of the room area. The advantage here is that other devices from the first device indirectly cooled are. This has the advantage that the spatial area of the device, about the inside of a cabinet, absorbs heat in its air. The heat is then deductible over the Ribs and the water cooler of the device. Another part of the heat but the air of the space area is also on the housing of the device to the Environment dissipated. Thus, not all the heat has to be above the Device with water cooler dissipated become.

In Training includes the device with its housing parts a room area within which heat generating devices are arranged, being the heat or part of the heat is deliverable to the space enclosed by the area air, wherein at least one of the devices a water cooler includes, the heat-conducting with cooling fins the cooler of the device, in particular an air cooler of the device, solvable is connectable. In particular, the device is a control cabinet. The advantage here is that with the device and other control cabinet devices are coolable, as soon as the air in the control cabinet is warmer than the average temperature the ribs.

at In an advantageous development, the device comprises signal electronics, which carried out so is that heat from the signal electronics to the surrounding area is. The advantage here is that the signal electronics on the water cooler cooled is, although this only the ambient air and no special others Means for heat flow control necessary.

at According to an advantageous development, the device is a converter, the signal electronics and power electronics for supplying an electric motor comprises. The advantage here is that in a housing type of a converter different Performance classes with different heat development are foreseeable, and that to the case, that partly with cooling function is fitted, as needed, an additional water cooler mountable is.

at In an advantageous embodiment, the device is an electrical device, such as uninterruptible power supply, frequency converter or inverter, the signal electronics and power electronics for supplying a Electric motor includes. The advantage here is that the performance per volume when mounting the water cooler is very high executable.

at According to an advantageous embodiment, the device is a controller, an inverter, a soft-start device, a motor starter, or has a motor currents switching or influencing Electronics on, with the device Signal electronics and power electronics includes. Is an advantage doing that, other devices too can be used to influence the energy flow.

at According to an advantageous development, the device has a controller, an inverter, a soft-start device, an uninterruptible power supply, an emergency generator or a frequency converter, a motor starter or generally a motor currents switching or influencing electronics, the device being signal electronics and power electronics. The advantage here is that the Invention is usable in an application field in which high heat generation typical.

at According to an advantageous development, the base plate additionally comprises connecting means for positive locking Connection with housing parts, especially for removal from a share of heat to the surroundings these housing parts. From Advantage is that the device as part of a kit for Drive systems executable is.

• – in einer ersten Variante der Baureihe das elektrische Gerät mit einem Luftkühler vorgesehen ist,
• – und in einer zweiten Variante der Baureihe das elektrische Gerät mit einem Flüssigkeitskühler betreibbar ist, der an dem Luftkühler anmontiert ist.

Important features in the invention of a series are that variants are provided, wherein the variants of the series each comprise an electrical device, in particular according to at least one of the preceding claims, wherein

• In a first variant of the series, the electrical device is provided with an air cooler,
• - And in a second variant of the series, the electrical device with a liquid cooler be is drivable, which is mounted on the air cooler.

From The advantage here is that either the water cooler to increase the Power density of the device can be mounted or not. Thus, with a single small Additional part, namely the water cooler, Two variants of the series with different power produced. Overall, however, three modes are possible. In a first one becomes only the air cooler operated, in a second, only the anmontierte to the air cooler water cooler operated, with the heat over the Heatsink of the air cooler to the water cooler flows, and in a third mode both coolers are operated to increase the cooling capacity or especially the device Cool ambient air.

at An advantageous development is depending on the required power density the device with for air cooling additional water cooling equipable, the air cooler a mechanical interface for releasably connecting to a Has water cooler.

at an advantageous development is in a variant of the first and in the second variant, a respective fan can be mounted on the air cooler. Thus, the variety is further increased in terms of achievable Cooling capacity classes.

Important Features in the invention of a device are that housing parts enclose a room area, within whose heat generating electrical appliances are arranged, with part of the heat to the space area enclosed air is deliverable, wherein at least one of the electrical equipment a water cooler includes, the heat-conducting with cooling fins the cooling device the electrical device, in particular an air cooler of the electrical device, solvable is connectable, in particular directly or indirectly via a with the cooling fins or cold fingers connected floor plate. Thus, a water cooler for indirect cooling over the Air of the room area usable.

at In an advantageous development, the device is a control cabinet. The advantage here is that the combined cooling device of air cooler and water cooler additionally for cooling of the cabinet interior is usable.

Important Features of the invention of a method for cooling an inverter, that the inverter at least one liquid cooler and an air cooler and Power semiconductor includes, with heat from the power devices through the heat sink of the air cooler is passed through to the liquid cooler. From The advantage here is that a novel cooling method for a Inverter is described, on the one hand, the cooling of the Inverter with low power development takes place via an air cooler and on the other hand, a possibility for connecting a water cooler is provided, which is the air cooling not impaired.

at In an advantageous embodiment, coolant water is used. The advantage here is that a cost-effective coolant is used.

at According to an advantageous development, the power semiconductors are connected in or on a base plate, which is made in one piece with cooling fins or cold fingers the heat sink, where Heat yourself between base plate and cooling fins or cooling fins without heat transfer spreads. The advantage here is that the cooling capacity of the air cooler is not through avoidable material limits is reduced.

Important Features of the invention of using an air cooler are, that the air cooler used is called a thermal bridge between Heat generating Components and a liquid cooler, in particular being between air cooler and liquid cooler one mechanical interface to the detachable Connection is provided. The advantage here is that the air cooler with a second function can be acted upon, namely the thermal bonding a water cooler if necessary.

Important Features of the invention of using an air cooler are, that one device is provided, in particular an inverter, a liquid cooler and Heat-generating Components, in particular power semiconductors comprises, wherein the air cooler Heat passes through from the heat generating components, in particular power components, for Chillers. From The advantage is that heat is dissipated by a converter depending on the performance is about a air cooler or a water cooler, being the change between the cooling methods can be carried out by a simple assembly step.

at In an advantageous embodiment of the air cooler passes a substantial part, in particular 90% or more, or the total part the heat heat generated by the generating components to the liquid cooler. From The advantage here is that the water cooler efficient cooling of the equipment causes. additionally is a warming the ambient air, in particular when mounted in the control cabinet, preventable.

Important features of the invention of using a liquid cooler are that the liquid cooler is provided on an air cooler of a device for increasing the cooling capacity, in particular such that the air cooler a substantial proportion or the total of the heat The heat absorbed by the generating components passes to the liquid cooler.

at an advantageous embodiment of the electrical device the heat generating components power modules and / or power semiconductors. The advantage here is that power electronics is predictable, in particular also, to great achievements to control how electric motors with several kW. Alternatively they are the components braking resistors or they are in frequency converters or uninterruptible power supplies used. The device according to the invention is an electrical appliance, which comprises at least power components that are cooled via a Heatsink.

Further Advantages emerge from the subclaims. The invention is not limited to the combination of features of the claims. For the expert arise further useful combination options of claims and / or individual claim features and / or features of the description and / or the figures, in particular from the task and / or the task of comparison with the state of the art.

1

supply

2

return

3, 34

water cooler

4

baseplate

5, 32

cooling fins

6 31

baseplate

7

power module

 11 36

connector

 12 37

final part

13 38

cool plate

20

Fan

33

connecting means for positive connection with housing parts

35

countersink

41

contact area

42

drilling

43

Coolant channel

 50, 60

cool plate

51 61

groove

52

drilling

53 63

spigot

54 64

survey

55

poetry

56

drilling

57 67

groove base

 68

surface

 69

passage

The The invention will now be explained in more detail with reference to figures: It shows:

1 an electrical device with air cooler and mounted water cooler,

2 the electrical device off 1 with additionally mounted fan,

3 another electrical device with air cooler and mounted water cooler,

4a the mechanical interface for mounting the water cooler in the device after 1 .

4b a sectional view through the device according to 1 .

5 a schematic diagram of a water cooler for mounting on the mechanical interface of the air cooler,

6a an oblique view of another water cooler for mounting on the mechanical interface of the air cooler,

6b a plan view of the mechanical interface in the assembled state facing side of the water cooler after 6a .

6c a sectional view through the water cooler after 6a ,

In the 1 a device according to the invention is drawn in parts.

It is an air-cooled operable electrical appliance. In the electrical appliance, heat sources such as electronic power semiconductors are comprehensive power modules 7 or power semiconductors whose heat is dissipated to a cooling device. This includes a heat sink with cooling fins 5 ,

In the embodiment according to 1 are the cooling fins 5 between a base plate 6 and a bottom plate 4 arranged.

Of the Heat sink is produced as an extruded profile, in particular of aluminum. Consequently he is inexpensive Can be produced and the air can be pulled along the ribs stream and the heat thus take up.

In particular, the cooling fins 5 formed as filament-shaped extruded profiles, the upper and lower side portions are each formed thickened and pressed together and / or welded to form the base plate 6 from the upper side areas and the bottom plate 4 from the lower side areas.

The bottom plate 4 is designed such that a mechanical interface is provided for mounting on a water cooler 3 holding a radiator plate 13 , a connection part 11 and a graduation part 12 consists. The supply line 1 and the return 2 for the water are, as in 1 visible, at the connection part 11 appropriate.

Consequently is the device in a first cheaper Operating mode in air-cooled only Way operational and in a second, more expensive mode of operation in a water-cooled manner operational.

In The first mode of operation is the device by means of its bottom plate to a wall, for example, the inside wall of a control cabinet or machine wall, mounted, cooled with air and has only a first maximum allowable power.

In the second operating mode, the same device is connected to the water cooler by means of its bottom plate 3 So the cooler plate 13 and mounted with its bottom then to a wall, such as cabinet inner wall or machine wall, mounted and has only a second maximum allowable power, which is far greater than the first power when the water cooling and the air cooling is operated simultaneously. When only the water cooling is operated, the heat flows from the heat generating components through the heat sink for air cooling through to the water cooler and is then removed with the water flowing through them.

Consequently the same electronics and the same housing of the device can be used for two different Performance classes, being in the higher Performance class just an extra water cooler must be provided. Next is also essential that at mere water cooling though no higher Performance class is achievable, but the heat does not reach the device directly removed ambient air but over the water cooler.

With The invention thus makes it possible an air-cooled Device instead of over air even with water to cool, by a water cooler is mountable. It is important that in the case of the mounted water cooler the Heat through the heat sink of the air cooler flows through to the radiator.

Important is also that at the contact surface between water cooler and bottom plate of the heat sink, so Air cooler, a mechanical interface is provided, so the two parts can be connected to each other.

4a shows the air-cooled device 1 , where the water cooler was removed. power modules 7 are on a base plate 6 assembled. At the interface between power modules 7 and base plate 6 Thermal paste is applied.

The base plate 6 flows into cooling fins 5 , Thus, an air cooler for the power modules 7 educated. Between the cooling fins 5 and the power modules 7 is thus for every power module 5 a heat path, ie a thermal bridge, formed for the outgoing heat, the only one material boundary - the interface between the power module 7 and the base plate 6 - crosses. Thus, an air cooler with high cooling capacity is provided.

The of the base plate 6 remote ends of the cooling fins 5 are each with a bottom plate 4 integrally connected.

The of the cooling fins 5 opposite side of the bottom plate 4 has a flat contact surface 41 on. The contact surface 41 is edited so that a mounting of a water cooler is possible, wherein the heat transfer resistance between contact surface 41 and water cooler is low. In particular, the contact surface is particularly flat and the surface quality as by grinding with special care or better accessible.

The bottom plate 4 has holes 42 into which screws are screwed for mounting a water cooler. The used water cooler has one to the contact surface 41 suitably trained contact surface. Thus, a low heat transfer resistance is achieved at the transition between the contact surfaces. This heat transfer resistance is further reduced by the use of thermal paste between the contact surfaces.

4b shows the air cooler 4a with mounted three piece water cooler 3 , This water cooler 3 includes a radiator plate in the parallel coolant channels 43 are provided for the passage of a coolant. These coolant channels 43 are about a connection part 11 and a graduation part 13 connected in pairs at their respective ends to form a meandering Kühlmitelkanals. These are in the connection part 11 and in the final part 13 provided corresponding recesses. The water cooler 3 is thus operable by connecting the coolant channel to a coolant circuit.

In an alternative embodiment, the coolant channels running parallel in the radiator plate are connected via connecting parts attached to the mouth sides of the coolant channels in such a way that a parallel connection of the coolant channels is created. At a connection part is in the This embodiment provides a supply line from the coolant circuit, while at the other connection part a return line to the coolant circuit is provided.

connectors and optionally end parts are integrally connected to the radiator plate and / or positively held by a rail system and / or a groove system. In alternatives are solvable Connections of the three parts of the radiator provided.

In a further development are the holes 42 in addition to the cooling fins 5 facing side accessible. Thus, the holes 42 used for mounting the air cooler on a wall, for example by using screws whose thread diameter is smaller than the clear width of the holes 42 is.

In a further embodiment the bottom plate is not flat, but it has a other geometric shape, which has a good heat conducting contact with the Heat generating Components causes.

at a further embodiment the connecting pieces are not on the side of the radiator plate but on their back appropriate. Alternatively, the connecting pieces are at different Sides of the radiator plate appropriate.

at a further embodiment the connecting pieces are designed as tapped holes, in which cooling pipes for connection to a coolant system can be screwed.

6a shows a further embodiment of a water cooler according to the invention, which with a bottom plate 4 an air cooler is connectable. A cooler plate 60 has a groove 61 on that in connecting pieces 63 lead to the connection of a cooling circuit. The radiator plate 60 has a flat, ground surface 68 on, which is a mechanical interface to the bottom plate 4 of the air cooler is formed. This mechanical interface is used to mount the water cooler to the likewise flat surface of the bottom plate 4 pressed by means of screws. The screws are arranged at regular intervals, preferably a distance between 2 cm and about 15 cm to produce a uniform contact pressure and a secure seal. This will cause the groove 61 closed, and there is a closed coolant channel formed, which the connecting pieces 63 connects and are particularly suitable for the passage of coolant fluid.

Greater distances of the Screws are depending on the material condition of the radiator plate, especially depending on the elasticity, provided in alternative developments.

6b shows the radiator in plan view of the ground surface 68 and the groove bottom 67 with the surveys 64 ,

6c shows a section along the line AA 6b , The section of the groove shown 61 is about a passage 69 with the adjacent section of the groove 61 connected, so that a meandering groove 61 is formed, as they are 6a and 6b demonstrate. The surveys 64 are arranged at regular intervals and have a height which is less than half the depth of the groove 61 is. The distances of the surveys 64 one another are chosen larger than the longitudinal extent, ie the extension in the groove direction, the surveys 64 ,

In In alternative education, the surveys are in irregular arrangements arranged and / or have an irregular distribution of the individual Längsausdehungen on.

In a further development, the bottom plate additionally centering means such as grooves, Noses and / or steps, and the water cooler has suitably trained to Centering on. Thus, a simple assembly is defined Relative position of water cooler and air cooler allows. Preferably, the centering means are designed such that a Load the screws to connect the radiator with the air cooler is avoided on shear. In an alternative or further education points the radiator plate the water cooler such centering means, and the bottom plate of the air cooler is trained accordingly.

In an alternative embodiment, the water cooler can be mounted on the bottom plate of the air cooler by means of a tensioning device. The tensioning device comprises, in particular, stirrups, levers and hooks, the stirrups being inserted into hooks for tensioning and, by folding over a lever connected in each case with one of the stirrups, the radiator to the baseplate 4 is pressed. Thus, a fast mounting option is provided.

Other Fastening means, for example clamping straps or latching mechanisms, for fixing the radiator plate on the bottom plate are provided in further developments.

In an alternative embodiment, the water cooler is inserted with one side in a groove-shaped recess of the bottom plate and releasably secured to the other side of the bottom plate, for example via a clamping device the type described or via a screw connection.

In further embodiments is the mechanical interface between bottom plate and radiator plate not formed as a plane, but it is another geometric Form provided with a good heat-conducting contact between Base plate and radiator plate is effected. For example, runs the mechanical interface along a section of a mental Spherical shell.

5 shows an alternative embodiment of a water cooler. Shown is a schematic diagram of the plan view of the surface of the water cooler, which is intended for connection to the bottom plate of the air cooler.

The water cooler includes a radiator plate 50 in which a groove 51 are formed meander-shaped. This groove 51 opens at their ends in holes 52 , in turn, in connecting pieces 53 end up. A cooling circuit is via the connecting pieces 53 connectable to the water cooler.

Will the cooler plate 50 with its groove side on the bottom plate 4 attached to the air cooler, so is with the now closed groove 51 a closed channel is formed, which the connecting pieces 53 combines. Thus, the radiator is ready for use in the mounted position and can be charged via the connecting pieces with coolant, such as water.

By the incomplete Design of the coolant channel in the water cooler are the production costs for the water cooler reducible.

drilling 56 in the cooler plate 50 Take screws over which the water cooler with the bottom plate 4 the air cooler is connectable.

The radiator plate 50 has sealant in the form of a circumferential seal 55 on. This seal 55 is inserted in a further development in a groove, not shown, or designed as a Loctite tape. The advantage of using a groove is that an inserted O-ring is squeezed in a defined manner when mounting the water cooler. Thus, the O-ring is protected from improper use and consequent destruction, and a secure, sturdy seal is provided.

Of the Water cooler, especially the cooler plate, is preferably produced by the aluminum casting process.

at alternative embodiments is the water cooler made of copper.

In an advantageous development, the groove bottom 57 the groove 51 surveys 54 on. These surveys 54 cause a turbulence of the flowing coolant and thus an increased cooling capacity.

at a further development, the bottom plate surveys, which in the groove-shaped Recesses of the radiator plate fit and partially fill. Thus, the recesses are sealed, and it is a coolant channel educated. The elevations of the bottom plate additionally cause a Centering aid when placing the cooler plate on the base plate and relieve the mounting means in the assembled state. The geometric shape of the surveys is preferably carried out such that by the contact pressure of the radiator plate the bottom plate is a sealing completion of the coolant channels is effected.

In the alternative embodiment according to 3 is again a water cooler 34 provided on the base plate 31 itself is mountable. This is designed to be T-shaped, that the water cooler is attached laterally. The base plate 31 not only includes the cooling fins 32 but also connecting means 33 For the positive connection with housing parts, so a further mechanical interface. Heat generating components, in particular power semiconductors, are at the rear of the baseplate 31 appropriate. If metallic housing parts are used, a further part of the heat can also flow into the environment via them. The base plate itself is also at least partially housing-forming.

The water cooler is designed in three parts, with inside a radiator plate 38 Coolant channels are provided, and at the end faces a connection part 36 and a graduation part 37 is appropriate. The connection part 36 connects the coolant channels with each other and with a supply line 1 and a return 2 a coolant circuit. The final part 37 connects the coolant channels with each other. cool plate 38 , Final part 37 and connection part 36 are materially connected to each other, in particular by welding or gluing.

A cutout 35 is intended to accommodate a fan. Thus, another variant can be formed, in which the cooling capacity of the air cooler is increased by means of fans.

at an alternative embodiment is the water cooler one piece executed.

In a first embodiment of the invention, the device is a converter for industrial applications. He supplies an electric motor and controls it. For this purpose, the inverter Sig nalelektronik, which is designed with a thermal barrier to power electronics. The thermal barrier can on the one hand be worse than metal conductive material by a heat and / or by appropriately provided air movement, ie a separation of the power electronics and the signal electronics touching air currents.

In another embodiment of the invention is the device for feeding a medium frequency current into a primary conductor system the movably arranged consumer are provided, the off the primary conductor system inductively coupled secondary coils are available.

In another embodiment of the invention is the device a soft starter or a motor power switching device or a controller with power level. Alternatively, the device is an electrical device, such as an uninterruptible power supply, ie emergency generator or the like, or a frequency converter or inverter.

In one embodiment of the invention, the device is provided in a control cabinet or other luftabgeschlossenen space area. Here, the heat sink with cooling fins takes over 5 another function, namely the cooling of the air surrounding the device, for example, the internal air in the control cabinet. Thus, other electronic devices, which are provided in the control cabinet, can be cooled by means of the heat dissipatable via the cooling fins to the water cooler.

As in 2 is shown, in another embodiment of the invention, an electric motor driven fan 20 provided such that the air flow along the cooling fins is actively driven and / or controlled. Thus, in the first mode, a higher maximum allowable power can be achieved because the air flows not only convectionally driven but much more air flow per time passes through the air cooler. In the second mode, a slightly higher performance is also achievable. Alternatively, however, the ambient air of the device can be cooled, so other devices are coolable.

The fan 20 to 2 is arranged with two other fans in a fan module, which is non-positively and / or positively connected to the radiator, in particular the ribs 5 the radiator.

In a further embodiment of the invention is the heat the signal electronics of the device dischargeable to the environment. This can be done directly or indirectly via a heat sink. Thus, if the device is mounted in a control cabinet or enclosed room area, the signal electronics turn over the surrounding air and this in turn on the cooling fins of the air cooler of the equipment cooled, because it is cooled by the water cooler.

In a further embodiment of the invention, the water cooler is designed mechanically elastic so that the cooling fins 5 comprehensive air cooler. In addition, the means for releasably connecting the water cooler with the air cooler are designed such that the plate 3 just to the bottom plate 4 is created when connecting. Thermal paste or foil may be provided between the two plates. The means comprise connecting screws, which are guided through the air cooler and can be screwed to the water cooler. Alternatively, clamping means are provided as connecting means, which are arranged such that the elastic plate 3 to the bottom plate 4 is pressed, with a uniform possible concern is achieved. In a further development, the clamping means include clamping hooks or other clamping elements

In another embodiment of the invention, the heat sink is different from 1 made from a copper rolled section.

The features of the cooling system according to the pending patent application DE 10 2006 020 801 are advantageous combined with the features of the presented cooling device of air cooler and radiator. This is on this DE 10 2006 020 801 Reference is made to the relevant disclosure in the content of the present description, in particular as exemplary embodiments and development of the cooling system described here.

Claims (37)

Electrical device comprising heat-generating electrical components, in particular power semiconductors, and a cooling device for dissipating this heat, characterized in that the cooling device is formed from an air cooler to which a liquid cooler is mounted, the air cooler between the liquid cooler and the heat-generating electrical Components is provided. Apparatus according to claim 1, characterized in that wherein the Lüftkühler comprises a heat sink, the ribs and / or fingers for heat dissipation to passing air, and the heat-generating electrical components are connected in or on a base plate, in particular thermally conductive, wherein the base plate integral with the heat sink is formed, and the heat sink has a mechanical interface for releasably connecting to a liquid cooler. device according to at least one of the preceding claims, characterized in that the mechanical interface includes a bottom plate for mounting of the liquid cooler. device according to at least one of the preceding claims, characterized in that on the bottom plate a water cooler is mounted. device according to at least one of the preceding claims, characterized in that the water cooler a cooler plate comprises, are formed in the parallel coolant channels, preferably by connecting parts and / or end parts to a coolant channel system are connected, in particular wherein the coolant channels as a bore and / or as Groove are formed. device according to at least one of the preceding claims, characterized in that the water cooler a cooler plate comprises, in the recesses for receiving and / or passage a cooling liquid are formed, wherein the bottom plate of the air cooler at least partially housing-forming for the Recesses is. device according to at least one of the preceding claims, characterized in that the recesses of the radiator plate as a meandering groove are formed in the side or in the rear wall of the radiator plate attached connection devices, in particular connecting pieces, for connection to a coolant system lead. device according to at least one of the preceding claims, characterized in that the bottom plate has elevations leading to the recesses of the cool plate are designed to fit, in particular for sealing completion the recesses and / or as a centering aid. device according to at least one of the preceding claims, characterized in that the bottom plate over the cooling fins and / or cold fingers spaced from the base plate is formed. device according to at least one of the preceding claims, characterized in that on the base plate of the heat sink on the one hand cooling fins and / or cold fingers are formed and on the other hand, a bottom plate for manufacturing a connection with the bottom plate is provided, in particular wherein the bottom plate and the base plate are integrally formed. device according to at least one of the preceding claims, characterized in that the base plate with the cooling fins or with cold fingers one piece is trained. device according to at least one of the preceding claims, characterized in that between water cooler and heat sink thermal grease or heat conducting foil is provided. device according to at least one of the preceding claims, characterized in that the mechanical interface and the means for connecting such accomplished are that water cooler and heat sink the contact surface substantially just adjoining are connectable. device according to at least one of the preceding claims, characterized in that the means for connecting comprise clamping elements. device according to at least one of the preceding claims, characterized in that the heat sink and / or the radiator plate can be manufactured as an extruded profile or die-cast. device according to at least one of the preceding claims, characterized in that the heat sink cooling fins between a base plate and a bottom plate, which for Connection mimt the water cooler is provided. device according to at least one of claims 1 to 10, characterized in that the heat sink cooling fins on a base plate comprises, attached to the one bottom plate or integrally formed is, which is intended for connection to the water cooler device according to at least one of the preceding claims, characterized in that a fan for generating airflow provided along the fins of the heat sink is. device according to at least one of the preceding claims, characterized in that the device is provided in a closed room area, allowing heat out the air of the room area along with the heat of the components over the Ribs and the water cooler dischargeable is. Device according to at least one of the preceding Going claims, characterized in that in the space area further devices are arranged, which have heat-releasing components to the air of the space area. device according to at least one of the preceding claims, characterized in that the device Signaling electronics, which is designed such that heat from the signal electronics can be delivered to the surrounding area of space. device according to at least one of the preceding claims, characterized in that the device An inverter is the signal electronics and power electronics for supplying an electric motor. device according to at least one of the preceding claims, characterized in that the device a controller, a converter, a soft starter, a uninterruptible power supply, an emergency generator or a Frequency converter, a motor starter, or a motor currents switching or influencing electronics, wherein the device is signal electronics and power electronics. device according to at least one of the preceding claims, characterized in that the base plate in addition Connecting means for positive locking Includes connection with housing parts, especially for removal from a share of heat to the surroundings these housing parts. Series of electrical appliances, the variants of the Series each an electrical device, in particular after at least one of the preceding claims, include, characterized in that - in a first variant of the series provided the electrical device with an air cooler is - and in a second variant of the series, the electrical device with a Liquid cooler operable is that on the air cooler is mounted. Series of devices according to at least one of the preceding claims, characterized that Depending on the required power density, the device with additional air cooling water cooling is equipable, the air cooler being a mechanical interface to the releasable Connecting with a water cooler has. Series of devices according to at least one of the preceding claims, characterized that in a variant of the first and second variants each one Fan can be mounted on the air cooler is. Device with housing parts forming a space area enclose, within whose heat generating electrical appliances are arranged wherein a portion of the heat to the space enclosed by the area Air is deliverable, characterized in that at least one of the electrical appliances a water cooler includes, the heat-conducting with cooling fins the cooling device the electrical device, in particular an air cooler the electrical device, solvable is connectable, in particular directly or indirectly via a with the cooling fins or cold fingers connected floor plate. Device according to at least one of the preceding Claims, characterized in that the device is a control cabinet. Method of cooling an inverter, wherein the inverter at least one liquid cooler and an air cooler and power semiconductors, and where heat from the power components passed through the heat sink of the air cooler becomes a liquid cooler. Method according to one of the preceding claims, characterized characterized in that as a cooling liquid Water is used. Method according to one of the preceding claims, characterized characterized in that the power semiconductors on, in or on one Base plate are connected, which is made in one piece with cooling fins or cold fingers the heat sink, in which Heat yourself between base plate and cooling fins or cooling fins without heat transfer spreads. Using an air cooler as a thermal bridge between heat-generating Components and a liquid cooler, in particular being between air cooler and liquid cooler one mechanical interface to the detachable Connection is provided. Use of an air cooler on a device, in particular inverter, the device, in particular the converter, a liquid cooler and heat generating components, in particular power semiconductors, characterized, that the air cooler Heat passes through from the heat-producing Components, in particular power components, to the liquid cooler. Use of an air cooler after the vo claimed range, characterized in that the air cooler passes a significant proportion or the total part of the heat generated by the components of the heat absorbed by the liquid cooler. Use of a liquid cooler characterized that the liquid cooler on an air cooler of a device is provided to increase the cooling capacity, in particular such that the air cooler is a substantial proportion or the total part of the heat generating components absorbed heat passes to the liquid cooler. Use according to claim 32 or 33, characterized that the air cooler has an interface for mounting the liquid cooler.