CN218977110U

CN218977110U - Electronic device, electronic apparatus, and electronic system

Info

Publication number: CN218977110U
Application number: CN202223611023.5U
Authority: CN
Inventors: 徐长喜; 尹雪芹; 曹虎; 尹小强; 李善鹏
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2022-12-31
Filing date: 2022-12-31
Publication date: 2023-05-05
Anticipated expiration: 2032-12-31

Abstract

The utility model discloses an electronic device, electronic equipment and an electronic system, wherein the electronic device comprises a box body, an electric module and a heat dissipation module, wherein a containing space is arranged in the box body, and an air inlet and an air outlet which are communicated with the containing space are arranged on the box body; the electric module is arranged in the box body and comprises a voltage converter and a battery management system; the heat dissipation module is arranged in the box body and comprises a fan assembly, and the fan assembly is used for dissipating heat of the voltage converter and the battery management system. According to the electronic device provided by the embodiment of the utility model, as the BMS and the DCDC are arranged in the same box body, the connecting line between the BMS and the DCDC is arranged in the box body, so that the connecting line is prevented from being puzzled by factors such as rain erosion and insect bite, and the service life of the connecting line is prolonged.

Description

Electronic device, electronic apparatus, and electronic system

Technical Field

The present utility model relates to the field of electrical technology, and in particular, to an electronic device, an electronic apparatus, and an electronic system.

Background

In the conventional technology, a battery management system (Battery Management System, BMS) and a voltage converter (DCDC) in the device are two independent devices, which are separately disposed in different boxes. Connection lines are needed between the BMS and the DCDC, however, the connection lines between the BMS and the DCDC are exposed outside the box body and are easily damaged under the influence of factors such as rain erosion, insect bite and the like.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the electronic device, because the BMS and the DCDC are arranged in the same box body, and the connecting wire between the BMS and the DCDC is arranged in the box body, the connecting wire is prevented from being bothered by factors such as rain erosion, insect bite and the like, and the service life of the connecting wire is prolonged.

The electronic device according to the embodiment of the utility model comprises: the box body is internally provided with a containing space, and an air inlet and an air outlet which are communicated with the containing space are formed in the box body; an electrical module mounted within the housing, the electrical module including a voltage converter and a battery management system; the heat dissipation module is arranged in the box body and comprises a fan assembly, and the fan assembly is used for dissipating heat of the voltage converter and the battery management system.

According to the electronic device provided by the embodiment of the utility model, as the BMS and the DCDC are arranged in the same box body, the connecting line between the BMS and the DCDC is arranged in the box body, so that the connecting line is prevented from being puzzled by factors such as rain erosion and insect bite, and the service life of the connecting line is prolonged.

In addition, the electronic device according to the present utility model may further have the following additional technical features:

in some embodiments of the utility model, the fan assembly includes a first fan, the electrical module includes a first component, a cluster of elements, and a second component, the electronic device further includes: the partition plate divides the accommodating space into a first installation area and a second installation area, the first installation area is used for indicating a space formed between the partition plate and the surface of the air inlet on the box body, the second installation area is used for indicating a space formed between the partition plate and the surface of the air outlet on the box body, and the first fan is installed on the partition plate; the first component and the element cluster are arranged in the first installation area, and the working temperature of the first component is lower than that of the element cluster; the second component is arranged in the second installation area, and the working temperature of the first component is lower than that of the second component.

In some embodiments of the utility model, the separator comprises: the first plate, the second plate and the third plate are sequentially connected, the first plate and the third plate are parallel to the surface of the air inlet in the box body, the first fan is arranged on the first plate, and the first component and the second component are oppositely arranged on two sides of the first plate; the electrical module further includes: the third component and the first radiator are oppositely arranged on two sides of the second plate, the radiator is used for radiating heat of the third component, and the working temperature of the third component is higher than that of the first component.

In some embodiments of the present utility model, a fourth plate is disposed above the first radiator, the second plate, the fourth plate and a side plate of the box form a heat dissipation air duct, and the second plate is perpendicular to a surface of the box where the air inlet is located.

In some embodiments of the utility model, the electrical module further comprises: the bottom surface of the second radiator is arranged on the bottom surface of the box body, and the second component is adhered to the upper surface of the second radiator.

In some embodiments of the utility model, the second plate is perpendicular to a surface of the housing where the air inlet is located.

In some embodiments of the utility model, the first component comprises an inductance, the second component comprises a capacitance, and the cluster of elements comprises transistors.

In some embodiments of the utility model, the electrical module further comprises a first fuse and a second fuse, the first fuse disposed in the first mounting region; and the second fuse is arranged in the second installation area.

In some embodiments of the present utility model, the electronic device further includes a switch, where the switch is disposed on a surface of the air inlet in the box, and is configured to control the electrical module to be connected to or disconnected from an external circuit.

The utility model further provides electronic equipment with the electronic device.

According to the electronic equipment provided by the embodiment of the utility model, through the electronic device provided by the embodiment, the electronic device can be well cooled, meanwhile, the connecting wire is prevented from being bothered by factors such as rain erosion and insect bite, the service life of the connecting wire is prolonged, and the reliability of the electronic equipment is improved.

The utility model further provides an electronic system with the electronic equipment.

According to the electronic system provided by the embodiment of the utility model, the electronic equipment is arranged, so that the connecting wire is prevented from being bothered by rain erosion, insect bite and other factors, the service life of the connecting wire is prolonged, and the reliability of the electronic system is improved.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

Fig. 1 is a schematic structural view of an electronic device (hidden top cover) according to an embodiment of the present utility model;

FIG. 2 is a schematic view of an electronic device (another angle, hidden top cover) according to an embodiment of the present utility model;

FIG. 3 is a cross-sectional view of an electronic device at a second fan according to an embodiment of the present utility model;

fig. 4 is a schematic structural diagram of an electronic device at an air inlet according to an embodiment of the utility model;

fig. 5 is a schematic structural diagram of an electronic device at an air outlet according to an embodiment of the present utility model;

fig. 6 is a circuit schematic of an electrical module of an electronic device according to an embodiment of the utility model.

Reference numerals:

100. an electronic device;

1. a case; 11. an air inlet; 12. an air outlet; 13. a baffle; 101. a first mounting region; 102. a second mounting region; 103. a radiator mounting plate; 104. a first fan mounting plate; 105. a heat dissipation air duct; 106. an upper air outlet; 107. a lower air outlet; 108. a second fan mounting plate;

2. a fan assembly; 21. a first fan; 22. a second fan;

3. an inductance; 31. a second heat sink; l1, a first inductor; l2, a second inductor; l3, a third inductor; l4, a fourth inductor;

4. a first fuse; 5. a second fuse; 6. a capacitor; 7. an IGBT; 8. a first heat sink; 9. a cluster of elements; 10. and (3) a switch.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

An electronic device 100 according to an embodiment of the present utility model is described below with reference to fig. 1-6.

As shown in fig. 1 to 6, an electronic device 100 according to an embodiment of the present utility model includes: the box body 1, the electric module and the heat dissipation module, the box body 1 is provided with a containing space, the box body 1 is provided with an air inlet 11 and an air outlet 12 which are communicated with the containing space, and therefore air can enter the containing space from the air inlet 11 and then flow out from the air outlet 12.

Further, the electric module is installed in the case 1, and the electric module includes the voltage converter and the battery management system, whereby, when air enters the accommodating space from the air inlet 11 and then flows out of the accommodating space from the air outlet 12, the voltage converter and the battery management system can be cooled down, so that the voltage converter and the battery management system are at a proper operating temperature.

Still further, in order to improve the radiating effect to voltage converter and battery management system, this application still is provided with the heat dissipation module in box 1, and specifically, the heat dissipation module includes fan module, and fan module is used for dispelling the heat to voltage converter and battery management system, that is to say, after setting up fan module, fan module can blow to voltage converter and battery management system, can accelerate the velocity of flow of the interior air of accommodation space betterly to voltage converter and battery management system cooling well.

In a specific example of the application, the electrical module may be a BMS and DCDC integrated module, the voltage converter may be a DCDC (Direct current-Direct current converter) module, and the battery management system may be a BMS (Battery Management System) module, and it may be understood that, by making the voltage converter (Direct current-Direct current converter, i.e., the DCDC module) and the battery management system (Battery Management System, i.e., the BMS module) all installed in one box 1, the external interface may be reduced, and meanwhile, only one box 1 may reduce the space occupation of the box 1, improve the space utilization, and also simplify the routing and save the installation man-hour.

Therefore, according to the electronic device 100 of the embodiment of the utility model, as the BMS and the DCDC are arranged in the same box, the connecting line between the BMS and the DCDC is arranged in the box, so that the connecting line is prevented from being bothered by rain erosion, insect bite and other factors, and the service life of the connecting line is prolonged.

In a specific example of the present application, the voltage converter (Direct current-Direct current converter, i.e. the DCDC module) and the battery management system (Battery Management System, i.e. the BMS module) may also be integrated on the same circuit board, so that the external interface may be further reduced by such arrangement, the wiring between the voltage converter and the battery management system is simplified, the installation man-hour can be saved, and the assembly efficiency is improved. In another specific example, the voltage converter and the battery management system may be mounted on two circuit boards, respectively, and may be designed according to practical requirements without limitation.

In one embodiment of the present utility model, the fan assembly 2 includes a first fan 21, the electrical module includes a first component, an element cluster 9, and a second component, the electronic device 100 further includes a partition board, the partition board divides the accommodating space into a first mounting area 101 and a second mounting area 102, the first mounting area 101 is used for indicating a space formed between the partition board and a surface of the air inlet 11 on the box 1, the second mounting area 102 is used for indicating a space formed between the partition board and a surface of the air outlet 12 on the box 1, the first fan 21 is mounted on the partition board, wherein the first component and the element cluster 9 are disposed in the first mounting area 101, an operating temperature of the first component is lower than an operating temperature of the element cluster 9, and the second component is disposed in the second mounting area 102, and an operating temperature of the first component is lower than an operating temperature of the second component.

As one specific example shown in fig. 1 to 6, the partition includes a first fan mounting plate 104, the first fan mounting plate 104 is used to partition the accommodating space into a first mounting area 101 and a second mounting area 102, and the first fan 21 is mounted on the first fan mounting plate 104, wherein the voltage converter includes a capacitor 6 (i.e., a first component) and an inductor 3 (i.e., a second component), the capacitor 6 is located in the first mounting area 101, and the inductor 3 is located in the second mounting area 102. In this embodiment, the setting of the first fan mounting board 104 can be fine separates the accommodation space, can avoid the heat that inductance 3 produced to influence electric capacity 6, simultaneously, still make first fan 21 directly blow to the inductance 3 that produces more heat, can cool down inductance 3 effectively, simultaneously, first fan 21 has improved the velocity of flow of air at the during operation, can make electric capacity 6 also obtain cooling to a certain extent, and, still because the heat that the electric capacity 6 during operation produced is less, from this, although air flow through electric capacity 6 before flowing through inductance 3 earlier, but can not influence the operating temperature of inductance 3, otherwise, if air flow through inductance 3 earlier then through electric capacity 6, then influence the normal operating temperature of electric capacity 6 easily. From this, through setting up first fan 21 mounting panel 104 and first fan 21 to and to overall arrangement around electric capacity 6 and inductance 3, not only can effectually cool down electric capacity 6 and inductance 3, still make electric capacity 6 and inductance 3 separate for produce the more inductance 3 of heat can not influence and produce less electric capacity 6 of heat, and then make electric capacity 6 and inductance 3 all be in comparatively suitable operating temperature.

Further, the present application further enables the component cluster 9 (the component cluster 9 may include a transistor) that generates higher heat during operation to be disposed in the first mounting area 11, so that the component cluster 9 may be better separated from the inductor 3 that generates higher heat during operation, so that the heat generated during operation of the component cluster 9 and the heat generated during operation of the inductor 3 may be better avoided from being affected by each other, so that both the component cluster 9 and the inductor 3 may be at a suitable operating temperature, and in some embodiments, the capacitor 6 may refer to C1, C2 and C3 in the schematic circuit diagram. The inductor 3 may refer to L1, L2, L3, L4 in the schematic circuit diagram. In one embodiment of the present utility model, as shown in fig. 1 to 2, the inductor 3 may include: the first fan 21 is provided with two first inductances L1 and second inductances L2, and two first fans 21 are respectively relative with first inductance L1, second inductances L2 front and back, and like this, the air current that two first fans 21 blow out can in time take away the heat in first inductance L1 and the second inductances L2, and the radiating effect is good. Here, the third inductor L3 and the fourth inductor L4 need not be opposite to the third inductor L3 and the fourth inductor L4, because the heat generated by the first inductor L1 or the second inductor L2 is higher than the sum of the heat generated by the third inductor L3 and the fourth inductor L4, and therefore, only the third inductor L3 and the fourth inductor L4 need to be located in the second mounting area 102.

In some embodiments, the partition plate comprises a first plate, a second plate and a third plate, the first plate, the second plate and the third plate are sequentially connected, the first plate and the third plate are parallel to the surface of the air inlet 11 in the box body 1, the first fan 21 is mounted on the first plate, and the first component and the second component are oppositely arranged on two sides of the first plate; the electric module further comprises a third component and a first radiator 8, the third component and the first radiator 8 are oppositely arranged on two sides of the second plate, the radiator is used for radiating heat of the third component, and the working temperature of the third component is higher than that of the first component. Optionally, the second plate is perpendicular to the surface of the housing 1 where the air inlet 11 is located

As shown in fig. 1 to 2, in one specific example, the first plate is a first fan mounting plate 104, the second plate is a radiator mounting plate 103, the third plate is a second fan mounting plate 108, the radiator mounting plate 103, the bottom plate of the box 1 and the side plate of the box 1 define a heat dissipation air duct 105, the heat dissipation air duct 105 can guide and converge air flow, the first radiator 8 is located in the heat dissipation air duct 105, so that heat dissipation of the first radiator 8 is facilitated, the third component can be an IGBT7 (Insulated Gate Bipolar Transistor, insulated gate bipolar crystal), further, the IGBT7 and the first radiator 8 are respectively mounted on two sides of the radiator mounting plate 103, a heat conducting layer is arranged between the IGBT7 and the radiator mounting plate 103, and between the first radiator 8 and the radiator mounting plate 103, the heat conducting layer is made of heat conducting silicone grease, and the heat conducting rate between the first radiator 8 and the IGBT7 can be enhanced, so that heat in the IGBT7 can be timely transferred into the first radiator 8 and absorbed by the first radiator 8, and the heat dissipation effect is further improved.

Further, the third plate is located at the front end of the heat dissipation air duct 105, the fan assembly 2 includes a second fan 22, the second fan 22 is mounted on the second fan mounting plate 108 and is opposite to the heat dissipation air duct 105 from front to back, therefore, after the heat dissipation air duct 105 guides and converges the air flow, the air flow blown out by the second fan 22 opposite to the heat dissipation air duct 105 can be concentrated and blown to the first radiator 8, so that the heat absorbed by the first radiator 8 can be blown away rapidly, and the third component can be better dissipated.

Further, a fourth plate is disposed above the first radiator 8, and the second plate, the fourth plate and a side plate of the case form a heat dissipation air channel. As shown in fig. 1 to 2, in a specific example, a baffle 13 (i.e., a fourth plate) is further disposed in the heat dissipation air duct 105, where the baffle 13 is located above the first radiator 8 to close a gap between the first radiator 8 and the top plate of the box 1, so that wind blown by the second fan 22 can better enter into the first radiator 8, so that the first radiator 8 can be better cooled, and heat exchange between the first radiator 8 and the IGBT7 can be faster, so that the IGBT7 can be better cooled.

Optionally, the surface where the air inlet 11 is located in the box 1 is further perpendicular to the second plate in the application, referring to fig. 2, it can be seen that when the second plate, the fourth plate and a side plate of the box 1 form the heat dissipation air duct 105, the heat dissipation air duct 105 extends along the front-back direction, and therefore, when air enters from the air inlet 11, the air can better pass through the heat dissipation air duct 105 along the front-back direction, and then flows out from the air outlet 12, so that the air can flow more smoothly, and heat dissipation is further facilitated.

In addition, the operating temperature of the third component (i.e., IGBT 7) is higher than the operating temperature of the first component (i.e., capacitor 6), and thus, by providing the first heat sink 8 to dissipate heat from the third component, it is possible to preferably avoid the heat generated from the third component from affecting the first component.

Optionally, the electrical module further includes a second heat sink 31, a bottom surface of the second heat sink 31 is disposed on a bottom surface of the case 1, and a second component is adhered to an upper surface of the second heat sink 31. In a specific example, the bottom surface of the case 1 may be formed of a circuit board, the second heat sink 31 is mounted on the circuit board, the second component is mounted on the second heat sink 31, wherein the second component may be the inductor 3, and the air outlet 12 includes an upper air outlet 106 and a lower air outlet 107, wherein the lower air outlet 107 is opposite to the second heat sink 31 in front-rear direction. The second heat sink 31 may be a heat dissipation fin in one specific example, and two heat dissipation fins are provided, and the two heat dissipation fins are respectively installed at the bottom of the first inductor L1 and the bottom of the second inductor L2. The heat dissipation effect of the first inductor L1 and the second inductor L2 can be effectively improved through the arrangement of the heat dissipation tooth plates. In addition, the lower air outlet 107 is opposite to the first radiator 8 in front-back direction, so that heat in the first radiator 8 can be better discharged from the lower air outlet 107, and the heat dissipation effect on the first inductor L1 and the second inductor L2 is improved.

In some embodiments of the utility model, the electrical module includes a fourth component and a fifth component, the fourth component being disposed at the first mounting region 101; the fifth device is disposed in the second mounting area, as shown in fig. 1 to 2, and the battery management system includes a first fuse 4 (i.e., a fourth device) and a second fuse 5 (i.e., a fifth device), where the first fuse 4 is located at the air inlet 11, and the second fuse 5 is located at the rear end of the heat dissipation duct 105. In the embodiment, by arranging the first fuse 4 and the second fuse 5, a circuit with a problem can be disconnected in time, the overall safety of the box body 1 is ensured, and the phenomenon that the circuit in the box body 1 generates excessive heat and causes deflagration due to short circuit is prevented; in addition, the first fuse 4 and the second fuse 5 are both located at the lower temperature position in the accommodating space, so that the influence of heat emitted by other components on the first fuse 4 and the second fuse 5 can be reduced, and the occurrence of the phenomenon of error fusing is avoided.

In some embodiments of the present utility model, referring to fig. 1 and 4, the electronic device further includes a switch 10, where the switch 10 is disposed on a surface of the air inlet 11 of the case 1, for controlling the electrical module to be connected to or disconnected from an external circuit. Therefore, by arranging the switch 10 on the surface of the air inlet 11 on the box 1, the influence of heat generated during the operation of the electric module on the switch 10 can be avoided, and it can be understood that if the switch 10 is heated, workers are easy to be scalded during the operation of the switch 10.

The utility model also provides electronic equipment with the electronic device 100.

According to the electronic equipment provided by the embodiment of the utility model, through the electronic device 100 provided by the embodiment of the utility model, the electronic device 100 can be well cooled, meanwhile, the connecting wire is prevented from being bothered by factors such as rain erosion and insect bite, the service life of the connecting wire is prolonged, and the reliability of the electronic equipment is improved.

In some embodiments, the electronic device may refer to a control box in the energy storage device, the control box has a BMS function and a DCDC function in the energy storage device, the electronic device may refer to the energy storage device, and the electronic system may be an energy storage system. It will be appreciated that the electronic device may be a control box with a control function in other electronic devices, which is not limited herein, and is not limited in the same way as the electronic device and the electronic system.

Other configurations and operations of the electronic device 100, the electronic apparatus, and the electronic system according to the embodiments of the present utility model are known to those of ordinary skill in the art, and will not be described in detail herein.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. An electronic device, comprising:

the box body is internally provided with a containing space, and an air inlet and an air outlet which are communicated with the containing space are formed in the box body;

an electrical module mounted within the housing, the electrical module including a voltage converter and a battery management system;

the heat dissipation module is arranged in the box body and comprises a fan assembly, and the fan assembly is used for dissipating heat of the voltage converter and the battery management system.

2. The electronic device of claim 1, wherein the fan assembly comprises a first fan, the electrical module comprises a first component, a cluster of components, and a second component, the electronic device further comprising:

the partition plate divides the accommodating space into a first installation area and a second installation area, the first installation area is used for indicating a space formed between the partition plate and the surface of the air inlet on the box body, the second installation area is used for indicating a space formed between the partition plate and the surface of the air outlet on the box body, and the first fan is installed on the partition plate;

the first component and the element cluster are arranged in the first installation area, and the working temperature of the first component is lower than that of the element cluster;

and the second component is arranged in the second installation area, and the working temperature of the first component is lower than that of the second component.

3. The electronic device of claim 2, wherein the separator comprises:

the first plate, the second plate and the third plate are sequentially connected, the first plate and the third plate are parallel to the surface of the air inlet in the box body, the first fan is arranged on the first plate, and the first component and the second component are oppositely arranged on two sides of the first plate;

the electrical module further includes:

the third component and the first radiator are oppositely arranged on two sides of the second plate, the first radiator is used for radiating heat of the third component, and the working temperature of the third component is higher than that of the first component.

4. The electronic device of claim 3, wherein a fourth plate is disposed above the first heat sink, the second plate, the fourth plate and a side plate of the case form a heat dissipation air channel, and the second plate is perpendicular to a surface of the case where the air inlet is located.

5. The electronic device of claim 2, wherein the electrical module further comprises:

the bottom surface of the second radiator is arranged on the bottom surface of the box body, and the second component is adhered to the upper surface of the second radiator.

6. The electronic device of claim 2, wherein the first component comprises an inductance, the second component comprises a capacitance, and the cluster of elements comprises transistors.

7. The electronic device of claim 3, wherein the electrical module further comprises:

the first fuse is arranged in the first installation area; a kind of electronic device with high-pressure air-conditioning system

And the second fuse is arranged in the second installation area.

8. The electronic device of any one of claims 1-7, further comprising a switch disposed on a surface of the housing where the air inlet is located for controlling the electrical module to be turned on or off from an external circuit.

9. An electronic device comprising the electronic apparatus of any one of claims 1-8.

10. An electronic system comprising the electronic device of claim 9.