DE102008037372A1 - Housing for accommodation of e.g. connection interface, of motor vehicle, has accommodation chamber separated and thermally isolated from another accommodation chamber of housing, and recesses arranged at different side walls of housing - Google Patents

Abstract

The housing (1) has an accommodation chamber (5) for electrical and/or electronic components (3, 12) e.g. metal oxide semiconductor transistor-connection component (2) and connection interface. The accommodation chamber is separated and thermally isolated from another accommodation chamber (18) of the housing. The housing exhibits recesses (6, 7) in an area of the former accommodation chamber. The recesses are arranged at different side walls (8, 9) of the housing. The side walls of the housing exhibit an angle of 75 degree and 135 degree. One recess is arranged in a cover of the housing.

Description

The The present invention relates to a housing for temperature-sensitive components, with the features of claim 1.

So far known housing for temperature-sensitive components Most have an electrically operated fan, which creates an air circulation in the housing and so the Temperature in the housing keeps on a level, for which designed the arranged in the housing components and are allowed. A disadvantage of such housings but is that the fan for an electric current to Operation needed, thus energy consumed and the other causes noises during operation. This is special when used in motor vehicles of disadvantage, since the energy consumption of Fan influence on the fuel consumption of the motor vehicle and the fan also has disturbing noises generated during operation.

Housings that manage without fans are already known. For example, this is off DE 20 2004 012 318 U1 discloses a node or distribution element for a CAN bus system. In a housing, a printed circuit board is arranged, on which electronic components, including at least one power transistor, are arranged, and which contains connection elements for connection of the components for externally supplied cables. The housing is formed as a flat housing having a substantially ecki gem ground plan, with a lower part and a lid-like top, wherein in the housing, the circuit board is arranged such that it is clamped at composite housing at least in its end region between the upper and lower part, wherein Wärmeableitelemente are connected in the range of power transistors with heat dissipation surfaces of the circuit board, which are in direct contact with heat receiving surfaces of the housing. A disadvantage of this embodiment is that the heat load, which arises during operation of the electrical components, is the same for all arranged in the housing components. Therefore, all components must be designed for almost the same operating temperature.

Out DE 10 2005 048 100 A1 is another electrical device, in particular an electronic control device for a motor vehicle, known. In this embodiment, the electrical device is provided with a carrier, on which at least one electrical component is arranged. The electrical component gives off heat during operation and is heatable by means of a heat exchanger. It is envisaged that the heat exchanger is a bar press profile. Again, in the case of a uniform temperature is present, so that the components all to the temperature, which arises during operation, must be designed.

task The present invention is therefore a housing for Recording of electrical / electronic components to show which it allows different inside the housing Temperatures during operation of the electrical / electronic components and at the same time without the use of electrical or electromechanical Components, such as a Peltier element or a fan, adequate cooling of the electrical components and a derivative of the heat generated in the housing the operating heat to allow the electrical components.

These The object is achieved by the features of claim 1. Further advantageous embodiments of the invention are in the further education Subclaims and the further description and in particular the figures shown.

The housing according to the invention has at least two separate recording rooms on. A first Recording room serves to accommodate the most sensitive to heat Components to be arranged in the housing. Of the second receiving space serves to accommodate the particularly waste heat generating electrical / electronic components and the further electrical / electronic Components. Already by the spatial separation in the Housing is guaranteed to be different Temperatures in the housing arise during operation, as the electrical / electronic components or components, which reach a particularly high operating temperature or a particularly generate high heat output, from the heat-sensitive Components and / or components spatially in the housing are arranged separated.

Furthermore is a thermal insulation between the first and the second Receiving space provided in the housing so that waste heat, which reach the very high operating temperature during operation and / or particularly high heat emission generating and / or particularly heat dissipating electrical / electronic components of the second receiving space of the housing in the first receiving space the housing is largely prevented.

To dissipate the resulting waste heat during operation of the electrical / electronic components in the first receiving space of the housing openings through the housing wall are available to the outside. Preferably, first openings in the lid, that is in the upper region of the housing, and second openings in one or more side walls of the housing in the region of the first Recording room provided. Waste heat, which arises during operation of the components or the electrical / electronic components in the first receiving space, can thus be derived by natural convection and air circulation.

at the same time is the amount of air passing through the first breakthroughs flows out of the receiving space, through the second openings sucked in the form of cooler ambient air. In this way creates a natural circulation flow of air, which at the same time for cooling the components, electrical / electronic Components in the first recording room leads. Are the first Breakthroughs in the lid and the second breakthroughs in a side wall or in the floor area, the result is a chimney effect.

In an advantageous embodiment of the invention is provided additionally at least one electric fan use. By using a fan can in the housing electrical / electronic components with a even higher power can be used as the fan an additional or stronger air pressure set provides and thus the heat dissipation from the housing is increased.

alternative but not only electrical / electronic components can be used with a higher power, it can because of the higher and better air flow electrical / electronic Components with a lower maximum allowable Operating temperature can be used. This allows a less expensive production of the components.

In an advantageous embodiment of the invention is provided that the components and / or electrical / electronic components in first receiving space, which is there a lower maximum operating temperature reach as the electrical / electronic components in the second Recording room, MOST connectors, or MOST plugs are.

In These must-plug components are the optical fibers of the MOST bus plugged in. In these connector components are the optical signals from the optical fiber over the connector disconnected or decoupled.

For this the fiber optic ends are attached to plastic elements in the plugs optically coupled, so that then the optical signals from the light guide can be converted into electrical signals. These Plastic elements are made of clear plastic, which at exceeding a predetermined operating temperature becomes cloudy. Therefore, these components of the other components in the housing separated, in particular thermally separated, and isolated. These components are allowed do not exceed a temperature of about 95 degrees Celsius. Those electrical / electronic components which have high operating temperature reach or a particularly high heat generation and delivery and thus classified as relevant in the thermal analysis are arranged in the second recording room.

The Separation of the first and second receiving space can by a Separation done, which has a good insulating effect to to separate the first recording room from the second recording room.

When Particularly advantageous has been shown, this separation by a Housing of the components in the first recording room to achieve. The housing The components then provides the separation between the first and the second recording room.

Advantageous The housing is made of plastic, especially thermoplastic Plastic formed. The enclosure is a three-dimensional hollow spatial Equipped structures, which slipped over the components becomes. It has openings, which with the first and corresponding to second openings in the housing, so that the heat exchange is ensured to the outside remains.

The Housing is on a plate, on which at the same time the electrical / electronic Components are arranged in the housing, arranged. These Plate forms in an advantageous embodiment at the same time the Printed circuit board, which in an advantageous embodiment of the invention is designed as a multi-layer. This plate is preferable Copper-coated, since copper has a particularly good thermal conductivity having. Through the plate and its copper coating is thus the heat of the electrical / electronic components in addition transferred to the plate. The area for heat dissipation is enlarged in this way, so that a better Cooling power is generated.

It Thus, a larger heated area of the penetrating into the housing in the first receiving space Cool air to be flowed around. Thus, one more achieved better cooling.

In a further advantageous embodiment of the invention is the Plate on which the electrical / electronic components are arranged, made in one piece and extending almost over the entire inside length of the housing.

Since the plate extends into the first and second receiving space and a heat conduction between In the region of the transition between the first and the second receiving space, the plate has only small copper coating webs, so that a temperature line from the second receiving space into the first receiving space is virtually prevented.

The Copper coating of the plate also serves as a shield of the electrical / electronic components against EMC loads.

The housing according to the invention forms a Recording room for electrical and / or electronic components from, wherein in the housing at least a first receiving space and at least a second receiving space are formed. The first Recording room is from the second recording room of the housing separated and thermally isolated. The housing has in the Area of the first recording room at least a first and at least a second opening through the housing, wherein the first breakthrough and the second breakthrough in each case at different Side walls of the housing are arranged.

According to the Embodiment according to claim 2 is preferred that the Side walls of the housing, in which the openings are arranged, an angle of at least 75 degrees and at most Include 135 degrees between them.

According to the Embodiment according to claim 3 is preferred that the Side walls of the housing, in which the openings are arranged, an angle of nearly 90 ° degrees to each other form.

According to the Embodiment according to claim 4 is preferred that the first breakthrough in the lid of the housing is arranged.

Advantageous according to the embodiment according to claim 5 is that the first and the second breakthrough in the form of holes are formed in the side walls of the housing and the Holes a round, oval, rectangular or square shape and webs remain between the holes to the Stability, stiffness and EMC-tightness of the housing to ensure. This is on the one hand a sufficient Ensures stability of the housing, the other is a simple manufacture of the housing and given the breakthroughs.

Advantageous according to the embodiment according to claim 6 is that by the arrangement of the first and the second breakthrough in the housing the waste heat, which during operation of the arranged in the first receiving space, at least one electrical / electronic Component arises through the first breakthrough from the case discharged by convection and / or outflow of heated air and over the second breakthrough cooler ambient air flows into the housing. By choice and arrangement The breakthrough creates an air circulation in the housing and a sufficient cooling of the electrical / electronic Component (s) in the housing.

Advantageous according to the embodiment according to claim 7 is that the electrical / electronic components in the housing are arranged on at least one plate. This becomes the one achieves a stabilization of the housing and the other The electrical / electronic components are solid and safe arranged in the housing. It is then sufficient, the plate firmly anchored in the housing. Further precautions are unnecessary.

According to the Embodiment according to claim 8 is preferred that the Plate is made of FR4 or CM1 and has a copper coating.

Advantageous according to the embodiment according to claim 9 is that for thermal insulation of the first receiving space Insulating material is arranged from the second receiving space. hereby Ensures that the heat in the second recording room remains and the first exception room relatively unencumbered by the Heat emission of electrical / electronic components remains in the second recording room.

Advantageous according to the embodiment according to claim 10 is that the insulation material as housing of the components is formed in the first recording room. This is a simple one Editing given and the production of the housing and the separation of the at least two receiving spaces can be simple respectively.

Advantageous according to the embodiment according to claim 11 is that the copper coating of the plate in the region of the insulating material only webs of copper forms to heat dissipation the second recording room in the first recording room largely prevention. Thus, the function of copper plating may also be used in the second receiving space, without any heat conduction from the second to the first receiving space via the copper coating he follows. In addition, the plate thus production technology easy to be made.

According to the embodiment of claim 12 is preferred that the plate through the copper coating on the one hand for dissipating the heat generated by the electrical components in the the first and second receiving space and at the same time by the copper coating of the plate, a larger area for discharging the heat to the air in the first and second receiving space serves.

According to the Embodiment according to claim 13 is preferred that the Copper plating the plate a shield of electromagnetic Waves generated.

According to the Embodiment according to claim 14 is preferred that the first electrical / electronic component a must connection component and the second component is a port interface.

According to the Embodiment according to claim 15 is preferred that in at least second receiving space of the housing further electrical / electronic Components, preferably SMD components and / or amplifiers are arranged.

in the Furthermore, the invention is based on a concrete embodiment, in particular a must binding unit shown.

It demonstrate:

1 a housing according to the prior art with a fan,

2 a section through an inventive housing,

3 a view into the housing in the region of the transition between the first and the second receiving space, and

4 Side view of the housing in the area of the connection of the MOST bus.

In the further description on the basis of 1 to 4 are the same elements in the individual figures provided with the same reference numerals. This is for the clarity and clarity of the description.

1 shows the state of the art for a previously known MOST connector, which is arranged in a housing. The housing serves to protect the electrical / electronic components, which are arranged in the housing, also electrical / electronic components are shielded. MOST connectors serve to convert the optical data, which are optically transmitted in / on the MOST bus, back into electrical signals and to convert electrical signals into optical signals for the MOST bus. For this purpose, a connector strip on the housing is necessary, by means of which the terminals of the MOST bus can be connected to the housing. In the housing then a MOST connector is arranged, which converts the optical signals into electrical signals and vice versa. These MOST connectors are heat-sensitive, ie they must not exceed a predefined temperature, otherwise these MOST connectors will be damaged. Therefore, it is necessary in the prior art to use a fan in the housing to dissipate the heat generated during operation of the electrical / electronic components in the housing.

2 shows a section through an inventive housing 1 , In the case 1 are two recording rooms 5 and 18 intended. These are used to hold electrical / electronic components 2 . 3 . 12 , The first recording room 5 is from the second recording room 18 disconnected. In addition, both recording rooms 5 . 18 thermally isolated from each other. This is either insulation material 15 provided, which is a physical separation between the two receiving spaces 5 . 18 forms.

In this further embodiment of the invention, it is provided that the components 2 . 3 in the first recording room 5 from the insulation material 15 are enclosed in the form of a housing. This housing then also represents the separation between the first recording room 5 and the second recording room 18 represents.

Thus, in the housing 1 at least two recording rooms 5 and 18 formed, which are spatially separated and thermally insulated from each other. The housing 1 thus has a first recording room 5 on, the iso thermally insulated from the second receiving space 18 is. In the first recording room 5 are electrical / electronic components 2 . 3 arranged, which are particularly sensitive to heat. These are, for example, MOST connectors 2 and the downstream electronics 3 in addition to the socket 22 for connecting the MOST bus cable. At the MOST convector 2 are connections 21 provided, which in 1 are not shown. These are used in the socket 22 the cables of the MOST bus to the MOST component 2 to contact.

When operating the MOST component 2 waste heat is generated. At the same time, however, arises from the second recording room 18 arranged electrical / electronic components 12 , z. As amplifiers, a significantly larger heat energy, which is to considerable heating of the housing 1 and the second recording room 18 contributes.

By the separation and thermal insulation of the first receiving space 5 from the second accommodation space 18 ensures that the second recording room 18 resulting heat preferably and almost exclusively in the second receiving space 18 remains. To derive the first recording room 5 resulting waste heat has the housing 1 first and second breakthroughs 6 . 7 through the housing 1 in the area of the first recording room 5 on. In the case of the use of a housing, this indicates the first and second breakthroughs 6 . 7 corresponding openings. The side walls 8th . 9 are for the execution of druchbrüche 6 . 7 with holes 10 Mistake. Preferably, the holes 10 in the first side wall 8th , in the lid of the case 1 , as well as in at least one of the adjacent second side wall 9 arranged. Through these holes 10 in the lid then escapes the waste heat from the first receiving space 5 outward. Through the side holes 10 in the second side wall 9 flows cooler ambient air into the first receiving space 5 one. This creates a natural air circulation in the first recording room 5 , About the laterally arranged second openings 7 in the case 1 Cool ambient air is sucked in and over the first breakthroughs 6 the heated air flows off again. To stabilize the case 1 remain between the holes 10 Stege 11 , At the same time this design makes the EMC-tightness of the housing 1 guaranteed.

The side walls 8th . 9 enclose between them an angle of 75 degrees to 135 degrees. Preferably, the angle is nearly 90 degrees.

The first and second breakthroughs 6 . 7 are also referred to as vents or vents.

The enclosure is on the plate 4 which in the housing 1 is arranged and the various electrical / electronic components 2 . 3 . 12 carries, attaches or becomes between at least one side wall and the plate 4 held and fixed. The plate 4 preferably in the region of the first receiving space 5 a copper coating 14 on. The copper coating 14 serves to heat the must component 2 on the copper coating 14 derive. Because the copper coating 14 has a larger surface than the must component 2 , Thus, a better efficiency for discharging the resulting waste heat to the ambient air can take place.

In a further embodiment of the invention, the copper coating extends 14 the plate 4 almost over the entire plate 4 , This serves for EMC shielding. However, to avoid that in this case the first recording room 5 over the copper coating 14 through the heat in the second recording room 18 is heated, it is provided that in the area of the insulating material 15 and the demarcation between the first recording room 5 and the second recording room 18 the copper coating 14 only as thin webs 16 is formed, so that a heat conduction between the two receiving spaces 5 . 18 is largely prevented.

The insulating material 15 is preferably in the form of plastic parts or as a housing of the components 2 . 3 of the first recording room 5 intended. An almost rectangular separation between the two receiving spaces 5 and 18 is structurally advantageous. As insulating material 15 It has proven to be useful to use thermoplastic material.

In the second recording room 18 It has proved to be advantageous, arranged there electrical / electronic components 12 and in particular SMD components and amplifiers by means of a thermal bridge 19 to cool. The thermal bridge 19 forms a thermal transition between the respective component and the plate 4 and their copper coating 14 and on the case 1 arranged cooling fins 17 out.

In a further embodiment of the invention it is provided that in addition to the housing 1 further cooling plates 17 are arranged to further better cooling the case 1 to reach.

In 4 is a side view of the housing 1 in the area of the socket 22 shown. The socket 22 has connections 21 on. At the same time slots are arranged, which contribute to a better cooling.

In an advantageous embodiment of the invention, the housing also cooling fins on.

1

casing

2

electrical / electronic component

3

electrical / electronic component

4

circuit board

5

first accommodation space

6

first breakthrough

7

second breakthrough

8th

sidewall

9

sidewall

11

web

12

electrical / electronic component

14

copper coating

15

Insulation material / enclosure

17

heatsink

18

second accommodation space

19

thermal bridge

21

connections

22

receptacle

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 202004012318 U1 [0003]
• - DE 102005048100 A1 [0004]

Claims (15)

Casing ( 1 ), a recording room ( 5 . 18 ) for electrical and / or electronic components ( 2 . 3 . 12 ), wherein in the housing ( 1 ) at least one first recording room ( 5 ) and at least one second recording room ( 18 ) are formed, characterized in that the first receiving space ( 5 ) from the second recording room ( 18 ) of the housing ( 1 ) is separated and thermally insulated, the housing ( 1 ) in the area of the first recording room ( 5 ) at least a first and at least a second breakthrough ( 6 . 7 ) through the housing ( 1 ), the first breakthrough ( 6 ) and the second breakthrough ( 7 ) each on different side walls ( 8th . 9 ) of the housing ( 1 ) are arranged. Housing according to claim 1, characterized in that the side walls ( 8th . 9 ) of the housing ( 1 ), in which the breakthroughs ( 6 . 7 ) at an angle of at least 75 degrees and at most 135 degrees between them. Housing according to claim 1, characterized in that the side walls ( 8th . 9 ) of the housing ( 1 ), in which the breakthroughs ( 6 . 7 ) are arranged to form an angle of nearly 90 ° degrees to each other. Housing according to one or more of the preceding claims 1 to 3, characterized in that the first breakthrough ( 6 ) in the lid of the housing ( 1 ) is arranged. Housing according to one or more of the preceding claims 1 to 4, characterized in that the first and the second breakthrough ( 6 . 7 ) in the form of holes ( 10 ) in the side walls ( 8th . 9 ) of the housing ( 1 ) are formed and the holes ( 10 ) have a round, oval, rectangular or square shape and webs ( 11 ) between the holes ( 10 ) to ensure the stability, rigidity and EMC-tightness of the housing ( 1 ) to ensure. Housing according to one or more of the preceding claims 1 to 6, characterized in that by the arrangement of the first and the second opening ( 6 . 7 ) in the housing ( 1 ) the waste heat, which during operation of the in the first recording room ( 5 ) arranged at least one electrical / electronic component ( 2 . 3 ), through the first breakthrough ( 6 ) out of the housing ( 1 ) is removed by convection and / or outflow of heated air and via the second breakthrough ( 7 ) cooler ambient air into the housing ( 1 ) flows in. Housing according to claim 1 or 6, characterized in that the electrical / electronic components ( 2 . 3 . 12 ) in the housing ( 1 ) on at least one plate ( 4 ) are arranged. Housing according to claim 7, characterized in that the plate ( 4 ) consists of FR4 or CM1 and a copper coating ( 14 ) having. Housing according to claim 1, characterized in that for the thermal insulation of the first receiving space ( 5 ) from the second recording room ( 18 ) Insulation material ( 15 ) is arranged. Housing according to claim 9, characterized in that the insulating material ( 15 ) a housing of the components ( 2 . 3 ) of the first recording room ( 5 ). Housing according to claim 9 or 10, characterized in that the copper coating ( 14 ) of the plate ( 4 ) in the region of the insulating material ( 15 ) only bars ( 16 ) is formed of copper to a heat conduction from the first receiving space ( 15 ) in the second recording room ( 18 ) largely prevent. Housing according to one or more of the preceding claims 7, 8, 9, 10 or 13, characterized in that the plate ( 4 ) through the copper coating ( 14 ) on the one hand for the derivation of the resulting heat of the electrical components ( 2 . 3 ) in the first recording room ( 5 ) and at the same time by the copper coating ( 14 ) of the plate ( 4 ) a larger area for the delivery of heat to the air in the first receiving space ( 5 ) serves. Housing according to one or more of the preceding claims 9, 10, 13 or 14, characterized in that the copper coating ( 14 ) of the plate ( 4 ) generates an EMC shield. Housing according to one or more of the preceding claims 6, 7 or 14, characterized in that the first electrical / electronic component ( 2 ) a MOST connection component and the second component ( 3 ) is a connection interface. Housing according to one of claims 9 or 11, characterized in that in the at least second receiving space ( 18 ) of the housing ( 1 ) other electrical / electronic components ( 12 ), preferably SMD components are arranged.