Electrical device

Abstract

The invention relates to an electrical device having a sheet-metal housing and a fan, the fan having a fan housing which is connected to the sheet-metal housing in a snap-fit manner and which has a hinge pin which bears against a pivot axis which is oriented coaxially with respect to an edge of the sheet-metal housing in order to allow a pivot of the fan relative to the sheet-metal housing.

Description

Technical Field

[0001] This invention relates to an electrical device. Background Technology

[0002] It is generally known that electrical equipment has heat-generating components (such as power semiconductors) that are attached to a cooling body for heat dissipation. Summary of the Invention

[0003] Therefore, the object of the present invention is to improve electrical equipment, wherein it should be easy to manufacture and / or maintain.

[0004] According to the invention, this objective is achieved by an electrical device with the features given in claim 1.

[0005] An important feature of electrical equipment with sheet metal housings and fans, especially frequency converters or inverters, is that the fan has a fan housing.

[0006] - The fan housing is snapped together with the plate housing, and

[0007] - The fan housing has a hinge pin that abuts against an edge of the plate housing, which serves as a oscillation shaft, and / or against an oscillation shaft coaxially oriented with the edge of the plate housing for realizing the oscillation of the fan relative to the plate housing. In particular, the hinge pin abuts against a rotation shaft coaxially oriented with the edge of the plate housing for realizing the rotation of the fan relative to the plate housing.

[0008] In particular, the oscillation, especially the rotation, of the fan housing is prevented by the snap-fit ​​connection between the fan housing and the plate housing, and / or the oscillation, especially the rotation, of the fan housing can only be achieved after the snap-fit ​​connection between the fan housing and the plate housing is broken.

[0009] The advantage here is that the fan can be easily connected to or detached from the plate housing. Therefore, the electrical equipment can also operate without a fan. Alternatively, the fan can be snapped in, thereby providing more efficient heat dissipation. The connection method basically consists of two steps: first, bringing the fan housing against the edge of the plate, and then swinging the fan housing around a rotation axis until it snaps in. During connection, an electrical plug-in connection can be additionally established to power the fan motor.

[0010] In one advantageous design, the hinge pin is formed into an L-shape, with the edge of the sheet metal housing abutting the inner angle of the L. The advantage of this design is that the hinge is implemented simply and cost-effectively.

[0011] In one advantageous design, a locking lug is formed on the fan housing, which engages with a recess or recess in the sheet metal housing. Specifically, the locking lug is spaced apart from a hinge pin, and / or the locking lug protrudes in the opposite direction to the hinge pin on the fan housing. The advantage here is that the locking lug is integrally formed on the fan housing, thus providing a robust and load-bearing locking connection.

[0012] In one advantageous design, a guide pin is formed on the fan housing, which guides the fan housing at least when the snap-fit ​​connection is opened or closed. The advantage of this is that it prevents tilting during engagement and thus allows for simple and unobstructed connection establishment.

[0013] In an advantageous design, the fan housing, along with the hinge pin, guide pin, and / or locking lug, is implemented as a plastic injection molded part, particularly as a single piece and / or one-piece. The advantage of this is that it simplifies manufacturing and reduces costs.

[0014] In one advantageous design, the fan housing has a receiving area for the fan impeller driven by the electric motor and a narrowed area such that the airflow delivered by the fan impeller is narrowed as it flows through the narrowed area, thus increasing its average flow velocity. The advantage here is that the airflow enters the internal space area surrounded by the sheet metal housing at a higher velocity and therefore achieves higher cooling power.

[0015] In one advantageous design, the narrowed region is rounded such that the airflow passing through it is deflected 90° away from the fan in a direction perpendicular to the fan impeller's axis of rotation, and flows into the internal space of the electrical equipment, particularly the internal space region surrounded by the plate housing, through the grille opening at the front of the plate housing, especially facing the fan. The advantage here is that only a flat structure is required on the plate housing.

[0016] In one advantageous design, the plate housing has additional grille openings arranged on the sides of the electrical equipment. The airflow through the electrical equipment draws in additional airflow through these grille openings, which in particular increases the volumetric flow rate and also cools the heat sources of the electrical equipment arranged on the sides, as well as the plate housing itself.

[0017] In particular, a third grille opening is arranged on the side of the electrical equipment opposite the fan, through which all airflow exits. The advantage here is that the airflow delivered by the fan impeller flows through the internal space surrounded by the plate housing, and simultaneously draws in lateral input flow, thereby achieving high cooling power. Therefore, the substantially cubic plate housing has grille openings on at least three of its six sides, allowing air to flow in from both sides and out to the third side. Here, the second side is adjacent to the first side. Specifically, the third side is opposite the first side.

[0018] In one advantageous design, the fan shroud is constructed such that the flow cross-section monotonically decreases in the narrowing region as the distance from the fan impeller increases.

[0019] In particular, firstly, the width of the internal fan space provided by the fan shroud for airflow decreases monotonically; subsequently, the height of the internal fan space provided by the fan shroud for airflow becomes increasingly smaller.

[0020] Specifically, the width is measured in a direction parallel to the nearest plate shell surface, and the height is measured in a direction parallel to the normal direction of the nearest, especially flat, surface. The advantage here is that the airflow is first narrowed in the first direction, and then narrowed in a second direction perpendicular to the first direction. Therefore, this narrowing does not occur isotropically across the flow direction, but rather anisotropically across the flow direction over time.

[0021] In an advantageous design, the electrical equipment, particularly the frequency converter or inverter, has power electronics, especially power components, and electronic signaling devices, especially control components.

[0022] The power electronic device has a plate housing that forms an outer shell together with the cover.

[0023] The electronic signal device includes an electronic signal device housing, which is mounted on the power electronic device.

[0024] The cover has a connecting tab through which the mating connector of the power electronics device passes.

[0025] The connector of the electronic signal device is connected to the mating connector.

[0026] The cover is formed with a guide groove, which extends parallel to the insertion connection direction.

[0027] The guide ribs formed on the inner side of the electronic signal device housing extend into the guide groove and / or are guided by the guide groove.

[0028] At least one first centering boss is arranged on the plate housing, protruding toward the electronic signal device housing. A bolt passes through the centering boss, and also passes through the electronic signal device housing and is screwed into the threaded hole of the power electronics device.

[0029] The connecting piece has a hollow centering boss, particularly a centering boss made of plastic, which protrudes toward the housing of the electronic signal device, especially parallel to the insertion connection direction of the insertion connection formed by the plug-in component and the mating plug-in component.

[0030] Among them, the housing of the electronic signal device is formed with pins, especially cross pins, which extend into the hollow centering boss, especially for centering the housing of the electronic signal device relative to the plate housing.

[0031] The advantage here is that tilting is avoided when mounting electronic signal devices onto power electronic devices, because the pins, guide slots, and plug-in connections themselves form three centering components with different functions. Tilting is prevented by over-constraints (Überbestimmung) of different functions and, consequently, different directional tolerances. The cover is a crucial centering component here, as it provides most of the centering.

[0032] In one advantageous design, the connecting tab is bent and formed onto the cover. The advantage of this is that it allows for consideration of different spatial orientations when aligning the electronic signal device housing.

[0033] In one advantageous design, the cover is a plastic injection-molded part. The advantage here is that it simplifies manufacturing and is cost-effective, allowing the centering component to be integrated simply through configuration without additional work.

[0034] In one advantageous design, a protruding pin, formed on the cover, extends into a recess or notch in the base plate of the electrical device.

[0035] The shell of the sheet metal is connected to the substrate.

[0036] In this case, the edges of the sheet metal shell extend into the groove of the cover.

[0037] In particular, especially during the assembly of electrical equipment, the edge of the sheet metal is swung into the groove by the oscillating motion around the connecting line of the pin, and thus extends into the groove. The advantage here is that the minimum net diameter of the recess is greater than the maximum outer diameter of the pin. This allows the cover to oscillate while the pin is inserted into the recess. During this oscillation, which occurs after the pin is inserted into the recess, the edge of the sheet metal inserts, and in particular, swings into the groove.

[0038] In an advantageous design, the cover has a knockout area, which, especially after the knockout area is knocked off, allows access to the bolts that ensure the electrical grounding connection or protective earthing connection (PE connection). The advantage here is that the connection can be opened or closed without further modifications and therefore without the need for testing (such as high-voltage testing).

[0039] In an advantageous design, electrical equipment, especially power electronic devices, have...

[0040] - A circuit board that houses heat-generating components, particularly power semiconductors.

[0041] - A cooling body with at least one cooling rib, and

[0042] - Shell components of the sheet metal casing.

[0043] In this process, the bushing, especially the press-fit bushing, is inserted into the recess of the cooling rib.

[0044] In this process, bolts are screwed into the internal threads of the bushing, and the bolt heads press the circuit board with the components against the cooling element.

[0045] The bushing has a polygonal region that is pressed into the housing component.

[0046] The advantage here is that the bushing is fixedly connected to the housing component on one hand, and on the other hand, the bolt, when screwed into the bushing, causes the bushing to abut and / or press against the step of the cooling body. This presses the circuit board with its components against the cooling body, improving and ensuring heat transfer. Simultaneously, the bolt, along with the press-fit nut, serves as an electrical grounding connection for the housing component, used to connect the housing component to the conductive circuitry of the circuit board.

[0047] To improve the safety of the electrical grounding connection, it can also be selectively implemented as a double connection, which is therefore safer.

[0048] In an advantageous design, the bushing has teeth in the material that cut into the cooling ribs. Therefore, the cooling element is also securely electrically connected and grounded to the bushing, and consequently to the bolts and housing components, where a PE connection can be implemented instead of a grounding connection.

[0049] In one advantageous design, the teeth are external. The advantage of this is that the teeth cut into the recesses of the cooling element.

[0050] In one advantageous design, bolts pass through the cooling element, particularly the cooling ribs. The advantage here is that an electrical connection exists between the circuit board and the housing components.

[0051] In one advantageous design, the housing component is positioned on the side of the cooling body opposite to the circuit board.

[0052] and / or

[0053] The circuit board is positioned on the side of the cooling body away from the housing component. The advantage of this arrangement is that the housing component can be electrically connected to the conductive circuitry of the circuit board via bolts, while the circuit board can be mechanically protected on the other side of the cooling body.

[0054] In one advantageous design, the housing component is a stamped and bent piece made of sheet metal. The advantage of this is that it allows for simple manufacturing.

[0055] In one advantageous design, a polygonal region is arranged flush with and closed on at least one side of the housing component, particularly on the side of the housing component facing away from the cooling body.

[0056] In one advantageous design, the polygonal region protrudes radially onto the bushing. The advantage of this is that it provides high resistance to rotation.

[0057] In one advantageous design, the polygonal area is spaced apart from the teeth. The advantage here is that the housing components are spaced apart from the receiving area of ​​the circuit board, and the steps against which the bushing abuts are separated.

[0058] In one advantageous design, the notch is a notch in the cooling rib. The advantage here is that the cooling rib has a thickened area, within which a hole is machined to serve as the notch.

[0059] In one advantageous design, the bushing is made of steel. The advantage here is that it allows for simple and cost-effective manufacturing.

[0060] In one advantageous design, the coolant is made of aluminum. The advantage here is that the bushing is easily cut into the material of the coolant.

[0061] In an advantageous design, the cooling rib has a thickened portion interrupted by a notch, specifically in which the bushing is inserted into the notch and thus received within the thickened portion. The advantage here is that bushing reception can be achieved simply and safely.

[0062] In an advantageous design, additional bushings, particularly additional press-fit bushings, are inserted into additional recesses in additional cooling ribs of the cooling body.

[0063] In this process, additional bolts are screwed into the internal threads of the additional bushing, and the bolt heads of these additional bolts press the circuit board with the additional components against the cooling body.

[0064] The additional bushing has another polygonal region, which is also pressed into the housing component.

[0065] The additional bushing has additional teeth that cut into the material of the additional cooling rib.

[0066] The other tooth portion mentioned above is also an external tooth portion.

[0067] The additional bolt passes through the cooling body, particularly through the additional cooling ribs. The advantage here is that a sufficiently secure grounding connection can be established, as the two bolts act as independently functioning electrical grounding or protective grounding wires. In the event of failure of one bolt, the corresponding other bolt ensures continued functionality.

[0068] Further advantages are given by the dependent claims. The invention is not limited to the combination of features of the claims. For those skilled in the art, particularly for purposes proposed and / or proposed by comparison with the prior art, other reasonable combinations of features of the claims and / or individual claims and / or description features and / or drawings are possible. Attached Figure Description

[0069] The invention will now be explained in more detail with reference to the schematic diagram:

[0070] exist Figure 1 A cross-sectional view of a region of an electrical device according to the present invention is shown, wherein bushing 1 is used.

[0071] exist Figure 2 The oblique view shows a section of the electrical equipment.

[0072] exist Figure 3 The image shows a perspective view of bushing 1.

[0073] exist Figure 4 The diagram shows the connection between bushing 1 and housing component 5 of the electrical equipment.

[0074] exist Figure 5 The oblique view shows the housing 50 of the electronic signal device of the electrical equipment.

[0075] exist Figure 6 The cover 60 of the electrical equipment is shown in a perspective view.

[0076] exist Figure 7 The cover 60 is shown from another viewing direction.

[0077] exist Figure 8 The oblique view in the middle shows the electrical equipment without the housing 50 containing electronic signal devices.

[0078] exist Figure 9 The electrical equipment is shown in a perspective view.

[0079] exist Figure 10 The oblique view shows an electrical device equipped with a fan.

[0080] exist Figure 11 The fan is shown in an oblique view from the first viewing direction.

[0081] exist Figure 12 The electrical equipment is shown in a perspective view.

[0082] exist Figure 13 The fan is shown in a slanted view from a second viewing direction. Detailed Implementation

[0083] As shown in the figure, the electrical equipment has a circuit board 3, which is pressed against the cooling body 2 by the bolt head of the bolt 4.

[0084] Therefore, the heat-generating components, especially power semiconductors, mounted on the circuit board 3 are pressed against the cooling body 2, in particular to improve the thermal coupling between the components and the cooling body 2.

[0085] Preferably, bushing 1 is implemented as a press-fit bushing.

[0086] The bushing 1 is inserted into the notch, in particular the notch, of the cooling rib 20 of the cooling body 2, and has an internal thread, into which the threaded section of the bolt 4 is screwed. The bushing 1 is supported in the cooling rib 20 at the step of the cooling rib 20.

[0087] The bushing 1 has a polygonal region 31, particularly a hexagonal region, which protrudes from the cooling rib 20 and is pressed into the housing component 5 made of sheet metal. Thus, the bushing 1 is non-rotatably embedded in and non-rotatably connected to the housing component 5.

[0088] At the end region of the bushing 1 away from the polygonal region 31, the bushing 1 has a tooth 30, which is used to insert the bushing 1 into the cooling rib 20, such that the tooth 30 cuts into the material of the cooling rib 20.

[0089] The cooling body 2, together with the cooling ribs 20, is preferably made of aluminum; the bushing 1 is preferably made of steel.

[0090] The sheet metal of housing component 5 is preferably made of steel plate. Housing component 5 is particularly designed as a stamped and bent part.

[0091] The tooth 30 is implemented as an external tooth.

[0092] The housing component 5 is preferably arranged on the side of the cooling body 2 away from the circuit board 3.

[0093] The housing component 5 is detachably connected to the cooling body.

[0094] A pressure plate 7 is arranged between the bolt head and the circuit board 3 to disperse the force flow introduced by the bolt 4 and thus protect the circuit board 3 from excessive pressure. The pressure plate 7 is preferably made of metal, so that the housing component 5 is electrically connected to the conductive circuit of the circuit board 3 through the metal bushing 1, the metal bolt 4, and the metal pressure plate 7. In this way, a grounding connection and / or protective grounding connection can be provided for the housing component 5.

[0095] The helical axis of bolt 4 is oriented perpendicular to the extension direction of cooling rib 20.

[0096] In another embodiment of the invention, the component is a power module comprising a plurality of power semiconductors.

[0097] As in Figures 5 to 9 As shown in more detail, the electrical equipment, preferably implemented as an inverter or frequency converter, has a plate housing 80 that surrounds the power electronics of the electrical equipment in a manner forming an enclosure and is configured to be installed in a switch cabinet. On one side of the electrical equipment, the plate housing 80 is provided with a cover 60, particularly a plastic cover, which is connected to the plate housing 80, and on the bottom side, the plate housing is provided with a base plate 67.

[0098] The electronic signal device, especially the electronic signal device housing 50, is mounted on the power electronic device, specifically the plate housing 80 together with the cover 60, and is connected to the power electronic device by means of bolts.

[0099] The cover 60 is manufactured as a plastic injection molded part and has a protruding pin 61 that is inserted into a recess in the base plate 67. During the assembly of electrical equipment, the edge of the plate housing 80 is swung into the groove 66 of the cover 60 by a swinging motion around the connecting line of the pin 61.

[0100] Therefore, at least one edge of the sheet metal extends into one of the grooves 66 of the cover 60. Similarly, another edge of the cover 60 extends into another groove 66 of the cover 60. Thus, the cover 60 can be precisely aligned and centered relative to the sheet metal housing 80.

[0101] The cover 60 has a connecting tab 62 at its end region away from the pin 61, the connecting tab being bent at a 90° angle relative to the remainder of the cover 60. The connecting tab 62 has a centering hole 63 extending through the connecting tab 62 and a protruding centering boss 64, the centering boss being hollow.

[0102] Therefore, the first bolt in the bolt assembly can pass through the centering boss 64.

[0103] The cover 60 has a locking lug, so that the cover 60 can be snapped into the plate housing 80.

[0104] The plate housing has at least two hollow centering bosses 82, which are implemented as press-fit bushings or bolt bushings and are connected to the plate housing 80 accordingly.

[0105] One of the centering bosses 82 passes through the centering hole 63, and thus assists in the centering of the cover relative to the plate housing 80.

[0106] The centering boss 82, which passes through the centering hole 63, is pierced by the second bolt.

[0107] The mating connector 81 passes through another notch of the connecting piece 62.

[0108] The cover 60 has a guide groove 70 on one side, which is oriented parallel to the placement direction of the electronic signal device.

[0109] When placing the electronic signal device onto the power electronic device, the housing 50 of the electronic signal device is guided in such a way that it is prevented from tilting during placement.

[0110] For this purpose, the electronic signal device housing 50 has at least one guide rib 51 on its inner side, and in particular, when the electronic signal device housing 50 is placed on the plate housing 80, the guide rib is received in the guide groove 70 and guided therein.

[0111] The electronic signal device housing 50 houses a circuit board 52 equipped with electronic signal elements. Furthermore, the circuit board 52 is fitted with a connector 53, which is connected to a mating connector 81 of a power electronics device that passes through a connecting tab 62.

[0112] Furthermore, tilting is prevented by the following method: the cross pin 54 formed on the electronic signal device housing 50 extends into the centering boss 64.

[0113] Therefore, the spatial alignment of the plug-in housing 50 with respect to the power component of the electrical equipment is achieved by guide ribs 51 or more extending into the corresponding guide slots of the power component, and by the cross pins 54 and plug-in components 53 inserted into the centering boss 64, with the plug-in components being plugged into and connected to the mating plug-in components 81.

[0114] Additionally, the centering boss 82 extends into the corresponding cavity of the electronic signal device, so that the bolt can be screwed into the corresponding internal thread of the power electronics device, especially from the outside through the electronic signal device and through the cavity of the electronic signal device and through the centering boss 82.

[0115] Therefore, the cover 60 provides a predetermined function for housing electronic signal devices and also functions as a housing for the power electronics. Furthermore, since the cover 60 is made of plastic, it allows for unobstructed reading of RFID tags arranged within the power electronics.

[0116] The cover 60 is easy to label. However, additionally, warning markings and nameplate grooves, i.e. recesses, suitable for mounting nameplates can also be provided when the cover 60 is formed.

[0117] The cover 60 is made of an electrically insulating material.

[0118] In addition, the cover 60 has a knock-out area 60, which allows the bolts of the power electronics to be manipulated, in particular rotated, after the knock-out area 60 has been removed using a tool (especially a screwdriver), wherein the bolts can be used to ensure an electrical grounding connection or an electrical protective grounding connection.

[0119] As in Figures 10 to 13 As shown, a fan can be fastened to the housing of the electrical equipment by first bringing the fan housing 100 into a swing position by abutting the hinge pin 130 of the fan housing 100 against the edge of the plate housing that is oriented coaxially with the swing axis, and then swinging the fan housing about the swing axis, i.e., rotating by a swing angle, and at this time engaging with the plate housing 10.

[0120] The fan has a fan housing 100, which has a receiving area for an electric motor that drives the fan impeller and a narrowing area in which the airflow delivered by the fan impeller is narrowed and thus has a higher speed. Furthermore, the narrowing area 101 is implemented as curved, such that the airflow delivered by the fan impeller is deflected by 90° and guided through a frontal grille opening 120, specifically facing the fan, into the internal space of the electrical equipment.

[0121] Subsequently, the airflow through the electrical equipment additionally draws in additional airflow through the grille opening 121 arranged on the side of the electrical equipment. Therefore, this additional airflow increases the volumetric flow rate and also cools the heat loss sources of the electrical equipment arranged on the side and, consequently, the plate housing 80.

[0122] Additional grille openings are arranged on the side of the electrical equipment opposite to the fan, through which all the airflow flows out.

[0123] Therefore, in this way, the airflow from the fan, entering the electrical equipment at a high velocity, effectively cools the electrical equipment.

[0124] When the fan housing 100 is snapped into the plate housing 80, the fan housing 100 is snapped in by means of a locking lug 103 formed on the fan housing 100, and two spaced-apart hinge pins 130 formed on the fan housing 100 extend into the recess of the plate housing 80 and guide the fan housing 100, especially in the final stage of the swing.

[0125] The fan also has a plug-in component 131 that, during the described oscillation, engages with a mating plug-in component fastened to the plate housing 80. Thus, the fan can be powered.

[0126] As the distance from the fan impeller increases, the flow cross-section monotonically decreases in the narrowing region. First, the width of the internal fan space provided by the fan shroud for the airflow monotonically decreases, and subsequently, the height of the internal fan space provided by the fan shroud for the airflow decreases. Specifically, the width is measured in a direction parallel to the nearest plate housing surface, and the height is measured in a direction parallel to the normal direction of the nearest, especially flat, surface.

[0127] List of reference numerals

[0128] 1. Bushings, especially press-fit bushings

[0129] 2 cooling body

[0130] 3 circuit boards

[0131] 4 bolts

[0132] 5 housing components

[0133] 6 Heating components

[0134] 7 pressure plates

[0135] 20 Cooling Ribs

[0136] 30 teeth

[0137] 31 Polygonal regions, especially hexagonal regions

[0138] 50 Electronic signal device housing

[0139] 51 Guide Rib

[0140] 52 Circuit boards with electronic signal components

[0141] 53 Connector Components

[0142] 54 cross pins

[0143] 60. Covers, especially plastic covers

[0144] 61 sales

[0145] 62 connecting pieces

[0146] 63 centering holes

[0147] 64 centering bosses

[0148] 65 Knockout Area

[0149] 66 slots

[0150] 67 substrate

[0151] 70 guide slot

[0152] 80 Plate housings for power electronic devices

[0153] 81 mating connector

[0154] 82 centering boss

[0155] 90 through the notch 50 of the electronic signal device housing

[0156] 100 fan housing

[0157] Narrowing area of ​​fan housing 101 100

[0158] 102 Guide Pin

[0159] 103 Locking Lug

[0160] 120 front grille opening

[0161] 121 Side grille openings

[0162] 130 hinge pin

[0163] 131 Connector

Claims

1. An electrical device, particularly a frequency converter or inverter, comprising a sheet metal housing and a fan. in, The fan has a fan housing, - The fan housing is snapped together with the plate housing, and - The fan housing has a hinge pin (130). The hinge pin abuts against the edge of the plate housing that serves as the swing shaft. and / or The hinge pin abuts against a swing shaft coaxially oriented with the edge of the plate housing for realizing the swing of the fan relative to the plate housing, and / or a swing shaft arranged and / or oriented aligned with the edge of the plate housing for realizing the swing of the fan relative to the plate housing. In particular, the hinge pin abuts against a rotating shaft that is coaxially oriented with the edge of the plate housing and is used to realize the rotation of the fan relative to the plate housing. Especially among them, The oscillation, especially the rotation, of the fan housing is prevented by the snap-fit ​​connection between the fan housing and the plate housing, and / or the oscillation, especially the rotation, of the fan housing can only be achieved after the snap-fit ​​connection between the fan housing and the plate housing is broken.

2. The electrical equipment according to claim 1, characterized in that, The hinge pin (130) is formed into an L shape, wherein the edge of the plate shell abuts against the inner corner of the L. and / or The fan housing has locking lugs formed on it, which engage with recesses or grooves in the sheet metal housing. In particular, the locking lug is spaced apart from the hinge pin (130), and / or the locking lug protrudes in the opposite direction to the hinge pin (130) on the fan housing.

3. The electrical equipment according to any one of the preceding claims, characterized in that, A guide pin (102) is formed on the fan housing, which guides the fan housing at least when the snap-fit ​​connection is opened or closed.

4. The electrical equipment according to any one of the preceding claims, characterized in that, The fan housing, together with the hinge pin, guide pin and / or locking lug, is made as a plastic injection molded part, especially as a single piece and / or one-piece.

5. The electrical equipment according to any one of the preceding claims, characterized in that, The fan housing has a receiving area for the fan impeller driven by the electric motor and a narrowed area such that the airflow delivered by the fan impeller is narrowed when passing through the narrowed area, and thus its average flow velocity is increased.

6. The electrical equipment according to any one of the preceding claims, characterized in that, The narrowed area is rounded in such a way that the airflow passing through the narrowed area is deflected 90° away from the fan in a direction perpendicular to the rotation axis of the fan impeller, and flows into the internal space of the electrical equipment, especially the internal space area surrounded by the plate housing, through the front of the plate housing, especially through the grille opening (120) facing the fan.

7. The electrical equipment according to any one of the preceding claims, characterized in that, The plate housing has additional grille openings (121) arranged on the sides of the electrical equipment. The airflow through the electrical equipment draws in additional airflow through these grille openings, which in particular increases the volumetric flow rate and also cools the heat loss sources of the electrical equipment arranged on the sides, as well as the plate housing. In particular, a third grille opening is arranged on the side of the electrical equipment opposite to the fan, through which all the airflow flows out.

8. The electrical equipment according to any one of the preceding claims, characterized in that, The fan shroud is constructed such that the flow cross-section monotonically decreases in the narrowing region as the distance from the fan impeller increases. In particular, firstly, the width of the internal fan space provided by the fan shroud for airflow decreases monotonically; subsequently, the height of the internal fan space provided by the fan shroud for airflow becomes increasingly smaller. In particular, the width is measured in a direction parallel to the nearest plate shell surface, and the height is measured in a direction parallel to the normal direction of the nearest, especially flat, surface.

9. The electrical equipment according to any one of the preceding claims, characterized in that, Electrical equipment includes power electronic devices, especially power components, and electronic signal devices, especially control components. The power electronic device has a plate housing that forms an outer shell together with the cover. The electronic signal device includes an electronic signal device housing, which is mounted on the power electronic device. The cover has a connecting tab through which the mating connector of the power electronics device passes. The connector of the electronic signal device is connected to the mating connector. The cover is formed with a guide groove, which extends parallel to the insertion connection direction. The guide ribs formed on the inner side of the electronic signal device housing extend into the guide groove and / or are guided by the guide groove. At least one first centering boss (82) is arranged on the plate housing, protruding toward the electronic signal device housing. A bolt passes through the centering boss (82), and also passes through the electronic signal device housing and is screwed into the threaded hole of the power electronics device. The connecting piece has a hollow centering boss (64), particularly a centering boss (64) made of plastic, which protrudes toward the housing of the electronic signal device, particularly parallel to the plug-in connection direction formed by the plug-in component and the mating plug-in component. Among them, pins, especially cross pins, are formed on the housing of the electronic signal device, which extend into the hollow centering boss (64), especially for centering the housing of the electronic signal device relative to the plate housing.

10. The electrical equipment according to any one of the preceding claims, characterized in that, The connecting piece is bent and formed on the cover. and / or The cover is a plastic injection molded part. and / or A protruding pin, formed on the cover, extends into a recess or notch in the base plate of the electrical equipment. The shell of the sheet metal is connected to the substrate. In this case, the edges of the sheet metal shell extend into the groove of the cover. In particular, especially during the assembly of electrical equipment, the edges of the sheet metal are swung into the groove by the swinging motion of the connecting line around pin 6, and thus extend into the groove.

11. The electrical equipment according to any one of the preceding claims, characterized in that, The cover has a knock-out area, which, especially after the knock-out area has been knocked off, provides access to the bolts that ensure the electrical grounding connection or protective grounding connection. and / or Electrical equipment, especially power electronic devices, have - Circuit boards, which are equipped with heat-generating components, especially power semiconductors. - A cooling body with at least one cooling rib, and - Shell components of the sheet metal casing. In this process, the bushing, especially the press-fit bushing, is inserted into the recess of the cooling rib. In this process, bolts are screwed into the internal threads of the bushing, and the bolt heads press the circuit board with the components against the cooling element. The bushing has a polygonal area that is pressed into the housing component.

12. The electrical equipment according to any one of the preceding claims, characterized in that, The bushing has teeth that cut into the material of the cooling ribs. and / or The teeth are external teeth. and / or Bolts pass through the cooling element, especially the cooling ribs. and / or The housing components are located on the side of the cooling body opposite to the circuit board. and / or The circuit board is located on the side of the cooling element away from the housing components. and / or The housing component is a stamped and bent piece made of sheet metal.

13. The electrical equipment according to any one of the preceding claims, characterized in that, On at least one side of the housing component, particularly the side of the housing component facing away from the cooling body, a polygonal region is arranged to be flush with and closed with the housing component.

14. The electrical equipment according to any one of the preceding claims, characterized in that, The polygonal region protrudes radially on the bushing. and / or The polygonal region is separated from the teeth. and / or The notch is a notch in the cooling ribs. and / or The bushing is made of steel. and / or The cooling element is made of aluminum.

15. The electrical equipment according to any one of the preceding claims, characterized in that, The cooling rib has a thickened portion, which is interrupted by a notch, specifically in which the bushing is inserted into and thus received within the thickened portion. and / or Additional bushings, especially additional press-fit bushings, are inserted into additional recesses in additional cooling ribs of the cooling body. In this process, additional bolts are screwed into the internal threads of the additional bushing, and the bolt heads of these additional bolts press the circuit board with the additional components against the cooling body. The additional bushing has another polygonal region, which is also pressed into the housing component. The additional bushing has additional teeth that cut into the material of the additional cooling rib. The other tooth portion mentioned above is also an external tooth portion. The additional bolts pass through the cooling body, particularly through the additional cooling ribs.

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