Electrical device heat dissipation structure and electrical cabinet

Abstract

This invention discloses a heat dissipation structure and an electrical cabinet for an electrical device. The electrical device includes electrical components, an air duct assembly, and an airflow drive device. The air duct assembly has a first air duct and a second air duct connected by a vent. The electrical components are located within the first air duct, and a first air inlet corresponding to the first air duct is located at the bottom of the air duct assembly in the Z-axis direction. The second air duct is adapted to expel air outwards. The vent is opened along the X-axis direction. The airflow drive device is installed at the vent with its air inlet facing the same direction as the vent, and is configured to drive airflow through the first air inlet into the first air duct, and then through the vent into the second air duct. This heat dissipation structure provides high heat dissipation efficiency even when the electrical device is large in size.

Description

Technical Field

[0001] This invention relates to the field of cabinet heat dissipation technology, specifically to a heat dissipation structure for electrical devices and an electrical cabinet. Background Technology

[0002] The converter is an indispensable energy conversion unit in a power generation unit, serving as the control center of the entire electrical system. It directly affects electrical parameters and functions such as power generation efficiency and low-voltage ride-through, and interacts with the main controller in real time with various data. Reactors are typically installed in converters. Reactors, also called inductors, are widely used in circuits. In converters, they are connected between the DC rectifier and inverter stages. Their main purpose is to limit the AC component superimposed on the DC current to a specified value, maintain the continuity of the rectified current, reduce current ripple, make the inverter stage more stable, and improve the power factor of the frequency converter.

[0003] Reactors are typically formed by winding coils around an iron core, generating significant heat when energized, thus requiring active cooling. In existing technology, reactors are usually air-cooled, and to improve cooling efficiency, the reactor's own cooling path is not connected to the internal cooling air ducts of the converter. Typically, a reactor consists of a coil assembly and a housing, both fixedly mounted at the bottom of the converter. An air inlet and outlet are located at the bottom of the reactor, with airflow driven by a fan. This cooling method requires an air duct within the reactor housing to surround the coil assembly, limiting the size of the coil assembly and resulting in relatively low cooling efficiency. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned defects or problems in the prior art and to provide a heat dissipation structure for electrical devices and an electrical cabinet that can still provide high heat dissipation efficiency even when the reactor size is large.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] Technical Solution 1: A heat dissipation structure for an electrical device, the electrical device comprising electrical components, a duct assembly, and an airflow driving device; the duct assembly is provided with a first duct and a second duct connected by a vent; the electrical components are located within the first duct, and a first air inlet corresponding to the first duct is located at the bottom of the duct assembly in the Z-axis direction; the second duct is adapted to expel air; the vent is opened along the X-axis direction; the airflow driving device is installed at the vent, and the air inlet surface is aligned with the orientation of the vent, and is configured to drive airflow through the first air inlet into the first duct, and then through the vent into the second duct.

[0007] Technical Solution Two based on Technical Solution One: The vent is not lower than the electrical component in the Z-axis direction; the electrical component includes a fixing component and a heating component; the heating component is fixedly installed on the fixing component and heats up when energized; the fixing component is higher than the heating component in the Z-axis direction, and its portion protruding from the top of the heating component forms a step with the top of the heating component on at least one side in the X-axis direction; the air duct assembly is adapted to the shape of the electrical component, and the second air duct is located at the step position between the heating component and the fixing component to reduce the size of the air duct assembly in the X-axis direction.

[0008] Technical Solution 3 based on Technical Solution 2: The fixing component heats up when the heating component is powered on, and under the same conditions, its heat generation is less than that of the heating component.

[0009] Technical solution four based on technical solution three: the ventilation opening (5) is not lower than the electrical component (2) in the Z-axis direction.

[0010] Technical solution five, based on technical solutions one to four: two ventilation openings and two second air ducts are provided respectively; the two ventilation openings are arranged along the X-axis direction, or the two ventilation openings are arranged along the Y-axis direction.

[0011] Based on technical solution four or five, technical solution six: the air duct assembly includes a cover and an air duct, which are detachably and fixedly connected; the first air duct is located in the cover, and the second air duct is located in the air duct; the cover is provided with a first air outlet opened along the X-axis direction, and the air duct is provided with a second air inlet opened along the X-axis direction; the first air outlet and the second air inlet are connected and cooperate to form the ventilation opening.

[0012] Technical solution seven based on technical solution six: There are two air ducts, located on both sides of the cover in the X-axis direction, and both air ducts extend along the Y-axis direction.

[0013] Technical solution eight based on technical solution seven: The electrical device is a reactor, the fixed component of the electrical component is a magnetic core, and the heating component is a coil; the magnetic core and the coil are provided with multiple air gaps that penetrate their upper and lower surfaces along the Z-axis direction to increase the contact area between the magnetic core and the coil and the airflow entering the first air duct.

[0014] Technical solution nine, based on technical solutions seven or eight, further includes a receiving component; the electrical device is fixedly installed on the receiving component, and the cover and the receiving component cooperate to form an installation channel for installing the air duct along the Y-axis direction; the second air inlet is provided on a first surface of the air duct perpendicular to the X-axis direction; the installation channel has a second surface and a third surface opposite each other along the X-axis direction; the first air outlet is provided on the second surface; the first air outlet and / or the second air inlet are provided with a sealing element protruding from the edge of the air outlet; the installation channel and the air duct are configured such that, before the air duct enters the installation channel and moves to the first position, the sealing element does not interfere with other components; the third surface is provided with an abutment protrusion pointing to the second surface; the abutment protrusion is used to push the air duct toward the second surface after the air duct enters the installation channel and moves to the first position, and to make the sealing element tightly fit with the first surface, the second surface, or another corresponding sealing element when the air duct continues to move to the second position; when the air duct is in the second position, the first air outlet and the second air inlet are sealed and connected through the sealing element.

[0015] In addition, the present invention also provides technical solution ten: an electrical cabinet, which adopts the heat dissipation structure of the electrical device as described in any one of technical solutions one to nine, the electrical cabinet including a housing component and the electrical device; the electrical device is installed in the housing component, and the first air inlet is connected to the bottom of the housing component to allow air to enter from the outside; the second air duct is provided with a second air outlet, the second air outlet is exposed on the side of the housing component and is used to discharge air to the outside.

[0016] As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following beneficial effects:

[0017] In technical solution one, a heat dissipation structure for an electrical device is provided. The electrical device includes electrical components, a duct assembly, and a flow drive device. The electrical components generate heat when energized, and the heat needs to be carried away by airflow. The duct assembly forms a first airflow and a second airflow, which are connected by a vent. The flow drive device provides driving force for the airflow, improves heat dissipation efficiency, and ensures that the direction of airflow is from the first airflow to the second airflow.

[0018] In the heat dissipation structure of this electrical device, the first and second air ducts in the air duct assembly are designed to allow air to enter from the bottom and exit from the side. This air intake and exhaust method can capture the cooler air that accumulates at the bottom due to its heavier weight. Simultaneously, by opening the vents along the X-axis, i.e., placing them on the side rather than the top, the second air duct can be positioned on the side of the air duct assembly, reducing the height dimension of the air duct assembly. This allows sufficient space at the top of the electrical device when it is installed within the housing component. Furthermore, this design allows the vents to be closer to the electrical components, resulting in lower driving force loss for the airflow drive device and improved heat dissipation efficiency for the electrical components. In addition, the airflow within the air duct assembly, after entering from the bottom… The airflow moves upwards past the electrical components and gradually shifts towards the vent, encountering less resistance from these components and allowing for longer contact time between the airflow and the component surfaces, thus further improving heat dissipation efficiency. Furthermore, the airflow drive device is positioned at the vent to ensure effective heat dissipation. Placing the airflow drive device in the first air duct would cause airflow to enter the first air duct haphazardly after passing the drive device, resulting in airflow loss. Placing it in the second air duct would place the drive device too far from the electrical components requiring cooling, reducing heat dissipation efficiency. Simultaneously, the air inlet surface of the airflow drive device is perpendicular to the X-axis, meaning it faces the same direction as the vent, preventing the vent's orientation from obstructing the airflow. Therefore, this electrical device has the advantages of smaller size and higher heat dissipation efficiency.

[0019] In technical solution two, the vent is positioned no lower than the electrical component, ensuring that airflow enters the first air inlet and passes completely through the electrical component before exiting through the second air duct. The electrical component includes a fixed part and a heating part, which form a stepped notch. The air duct assembly is adapted to the shape of the electrical component, placing the second air duct at the stepped part of the electrical component. This maximizes the use of the electrical component's shape characteristics, reducing the size of the air duct assembly in the X-axis direction, allowing for a more compact electrical cabinet. Furthermore, compared to a solution where the second air duct is placed on top of the electrical component with the vent opening facing upwards, the fixed part of the electrical component protrudes beyond the heating part in the Z-axis direction, resulting in a greater distance between the first air outlet and the heating part, hindering heat dissipation for the high-heat-generating component. In this solution, the second air duct is positioned on the side of the electrical component, allowing the vent to be closer to the heating part. The airflow travels a shorter distance from the heating part to the vent, resulting in lower losses and higher heat dissipation efficiency for the electrical component.

[0020] In technical solution three, the fixed component also generates heat when the heat-generating component is energized. For example, when the fixed component is a magnetic core and the heat-generating component is a coil, the fixed component will also generate heat when the electrical component is working, but the heat generated will be less than that generated by the coil. Setting the vent on the side of the electrical component can dissipate heat from both the fixed component and the heat-generating component simultaneously. However, if the vent is set on the top of the electrical component, the heat dissipation efficiency for the fixed component will be higher, and the heat dissipation efficiency for the heat-generating component will be lower accordingly.

[0021] In technical solution four, the position of the vent is not lower than that of the electrical components, which can ensure that after the airflow enters the first air inlet and the first air duct, it can pass completely through the electrical components and then exit through the second air duct.

[0022] In technical solution five, two vents and two second air ducts are provided, allowing airflow to exit from both second air ducts simultaneously. Since electrical components have better heat dissipation efficiency closer to the vents, this solution effectively improves the heat dissipation efficiency of electrical devices compared to having only one vent and one second air duct. The two vents can be arranged in two ways: one is along the X-axis, in which case the two vents are opposite to each other, which makes the airflow movement more balanced and the overall heat dissipation effect better; the other is along the Y-axis, in which case the two vents are located on the same side of the air duct assembly, which can reduce the size of the air duct assembly in the X-axis direction.

[0023] In technical solution six, the air duct assembly includes a cover and an air duct, which are detachably and fixedly connected to facilitate the inspection and maintenance of the electrical device. The air duct is set on both sides of the cover in the X-axis direction, which can leave sufficient space for the side of the cover in the Y-axis direction. When other components need to be installed on the side of the electrical device in the Y-axis direction, the air duct will not interfere with those components.

[0024] In technical solution seven, two independent air ducts are provided corresponding to the two second air ducts. The two air ducts are located on both sides of the X-axis of the cover, and both air ducts extend along the Y-axis. Therefore, there is sufficient space between the two air ducts. When the electrical device is installed in the electrical cabinet, the space between the two air ducts can be used to install other electrical components. It can also avoid the problem of the air ducts being difficult to disassemble after installation, and make the installation and maintenance of the air ducts more convenient.

[0025] In technical solution eight, the electrical device is a reactor. When it is working, the magnetic core and coil will generate a lot of heat. Through the above-mentioned air duct design, the heat of the reactor can be effectively carried away to avoid overheating of the reactor. At the same time, multiple vertically connected air gaps are set on the magnetic core and coil to increase the contact area between the airflow and the magnetic core and coil, thereby improving the heat dissipation efficiency of the reactor.

[0026] In technical solution nine, the air duct is installed in an installation channel formed by the cooperation of the cover and the receiving component. This installation channel and the air duct are configured such that the seal does not interfere with other components before the air duct enters the installation channel and moves to the first position. This configuration ensures that the seal will not fall off or be damaged due to external force during air duct installation. However, increasing the size of the installation channel or decreasing the size of the air duct will prevent the cooling vent from sealingly connecting with the air inlet after the air duct is installed in place. Therefore, an abutment is provided on the third surface of the installation channel. During the installation of the air duct along the Y-axis, the air duct first reaches the first position. Then, the air duct continues to move, and the protrusion begins to act on the air duct, causing the air duct to move towards the second surface. At this time, the distance between the heat dissipation vent and the air inlet will get closer and closer until the air duct moves to the second position. At this time, the air duct is installed in place. At the same time, under the action of the protrusion, the air duct moves towards the second surface to the closest position. At this time, the seal also fits tightly with the first surface, the second surface, or another corresponding seal, so that the heat dissipation vent and the air inlet can be sealed and connected.

[0027] In technical solution ten, an electrical cabinet is provided, which adopts the above-mentioned heat dissipation structure for electrical devices. With this heat dissipation structure, the size of the electrical devices inside the electrical cabinet can be designed to be smaller, while having higher heat dissipation efficiency. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments are briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 Layout diagram of the electrical cabinet provided in the embodiment of the present invention Figure 1 ;

[0030] Figure 2 Layout diagram of the electrical cabinet provided in the embodiment of the present invention Figure 2 ;

[0031] Figure 3 This is a partial structural schematic diagram of the electrical cabinet provided in an embodiment of the present invention;

[0032] Figure 4 This is an exploded structural diagram of the electrical device in the electrical cabinet provided in an embodiment of the present invention;

[0033] Figure 5 This is a schematic diagram of the assembly structure of electrical devices in an electrical cabinet provided in an embodiment of the present invention;

[0034] Figure 6This is a schematic diagram of the structure of the reactor in the electrical cabinet provided in an embodiment of the present invention.

[0035] Explanation of key figure labels:

[0036] Electrical device 1; Electrical component 2; Air duct assembly 3; Airflow drive device 4; Ventilation outlet 5; First air duct 6; Second air duct 7; First air inlet 8; Cover 9; Air duct 10; First air outlet 11; Second air inlet 12; Fixing component 13; Heating component 14; Step 15; Air gap 16; Receiving component 17; Installation channel 18; First surface 19; Second surface 20; Third surface 21; Sealing component 22; Abutment protrusion 23; Second air outlet 24; Mounting side plate 25. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are preferred embodiments of the present invention and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0038] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and accompanying drawings of this invention is for distinguishing different objects and not for describing a specific order.

[0039] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this invention, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing the invention and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific scope of protection of this invention.

[0040] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this invention should be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection by other means or components.

[0041] In the claims, description and accompanying drawings of this invention, the terms "comprising," "having," and variations thereof are used to mean "including but not limited to."

[0042] Reference Figure 1 and Figure 2 This invention provides an electrical cabinet. Figure 1 and Figure 2 The main layout structure of the electrical cabinet is shown. The electrical cabinet mainly includes a housing component 17 and an electrical device 1. The electrical device 1 is installed within the housing component 17 and is cooled using a specially designed heat dissipation structure. However, this does not mean that the electrical cabinet only includes the housing component 17 and the electrical device 1; other components can also be installed within the housing component 17, and these components can be configured according to the type of electrical cabinet designed.

[0043] In this embodiment, the electrical cabinet is a converter. In other embodiments, the electrical cabinet may be other types of cabinets, such as energy storage cabinets, high-voltage cabinets, etc.

[0044] In this embodiment, the electrical device 1 includes an electrical component 2, an air duct assembly 3, and an airflow drive device 4. The air duct assembly 3 is provided with a first air duct 6 and a second air duct 7 connected by a vent 5; the electrical component 2 is located in the first air duct 6, and a first air inlet 8 corresponding to the first air duct 6 is located at the bottom of the air duct assembly 3 in the Z-axis direction; the second air duct 7 is adapted to expel air; the vent 5 is opened along the X-axis direction, and it is not lower than the electrical component 2 in the Z-axis direction; the airflow drive device 4 is configured to drive airflow through the first air inlet 8 into the first air duct 6, and then through the vent 5 into the second air duct 7 when in operation.

[0045] Reference Figure 1 and Figure 2 This diagram illustrates the heat dissipation structure of the electrical device 1 within the electrical cabinet. The first air inlet 8 is located at the bottom of the air duct assembly 3, allowing air to enter the electrical device 1 from the bottom. Since colder air, being heavier, tends to accumulate at the ground level, this bottom-entry design allows for the intake of cooler air. The airflow then reaches the first air duct 6 and flows along it until it reaches the vent 5. During this process, the airflow passes through the electrical component 2 within the first air duct 6, carrying away the heat generated by the component 2 during operation, thus dissipating heat. The airflow then reaches the vent 5 and proceeds through it to the second air duct 7, from which it is discharged outside the housing 17. In this process, the airflow drive device 4 drives the airflow.

[0046] In this embodiment, the vent 5 is configured to open along the X-axis, meaning its opening direction is parallel to the X-axis. In this embodiment, the vent 5 can be located on the left and / or right side of the air duct assembly 3. Simultaneously, the vent 5 is positioned no lower than the electrical component 2 along the Z-axis, meaning the top of the vent 5 is no lower than the top of the electrical component 2. This design aims to ensure the vent 5 is as close as possible to the electrical component 2. If the vent 5 is set too low, the top of the electrical component 2 will not receive sufficient airflow; if it is set too high, the top of the electrical component 2 will be too far from the vent 5, resulting in reduced heat dissipation efficiency. Furthermore, even if the vent 5 is not a regular geometric shape, since airflow passes through the vent 5 from any position, any part of the vent 5 can be used for airflow to carry away heat.

[0047] Furthermore, since the vent 5 is opened along the X-axis, the arrangement of the second air duct 7 can also be varied. In this embodiment, the second air duct 7 extends along the Y-axis, so that the second air duct 7 can be located on the left and / or right side of the air duct assembly 3. Compared to placing the second air duct 7 at the top, this reduces the space occupied by the electrical device 1 in the Z-axis direction. In this embodiment, two vents 5 and two second air ducts 7 are provided, with the two vents 5 arranged along the X-axis, that is, located on the left and right sides of the air duct assembly 3. Here, the two vents 5 being arranged along the X-axis does not mean that the axes of the two vents 5 are the same, but rather that the two vents 5 are relatively positioned in the X-axis direction. Figure 1When observing the vent 5 and the two second air ducts 7 from the perspective of [viewpoint], it can be seen that they are arranged in the X-axis direction. Of course, in other embodiments, the two vents 5 can also be arranged along the Y-axis direction. The arrangement of the vents 5 along the Y-axis direction mentioned here is based on the premise that the vents 5 are opened in the X-axis direction. The Y-axis direction here is not the Y-axis direction indicated in the accompanying drawings of this specification. It only indicates that the arrangement position of the two vents 5 is perpendicular to the opening direction of the vents 5. For example, both vents 5 can be set on the right side of the air duct assembly 3, and then the two vents 5 can be arranged in the front-back direction. Setting multiple vents 5 and second air ducts 7 can effectively improve the heat dissipation efficiency of the air duct assembly 3, and can also make the airflow path in the first air duct 6 more balanced, and the heat dissipation effect of various positions of the electrical component 2 can also achieve a better balance. In general, there are two vents 5 and two second air ducts 7, and the airflow can be discharged from both second air ducts 7 at the same time. Since the heat dissipation efficiency of the electrical component 2 is better the closer it is to the vent 5, the heat dissipation efficiency of the electrical device 1 can be effectively improved compared with only one vent 5 and one second air duct 7. The two vents 5 can be arranged in two ways. One is that the two vents 5 are arranged along the X-axis direction, in which case the two vents 5 are opposite to each other, which can make the airflow movement more balanced and the overall heat dissipation effect better. Alternatively, the two vents 5 can be arranged along the Y-axis direction, in which case the two vents 5 are located on the same side of the air duct assembly 3, which can reduce the size of the air duct assembly 3 in the X-axis direction.

[0048] Furthermore, referring to Figure 4 and Figure 5 The air duct assembly 3 includes a cover 9 and an air duct 10, which are detachably and fixedly connected. A first air duct 6 is located on the cover 9, and a second air duct 7 is located on the air duct 10. The cover 9 has a first air outlet 11 opened along the X-axis, and the air duct 10 has a second air inlet 12 opened along the X-axis. The first air outlet 11 and the second air inlet 12 are connected and cooperate to form the ventilation opening 5. The detachable connection of the cover 9 and the air duct 10 facilitates the inspection and maintenance of the electrical device 1. The air duct 10 is located on both sides of the cover 9 along the X-axis, providing sufficient space for the sides of the cover 9 along the Y-axis. When other components need to be installed on the sides of the electrical device 1 along the Y-axis, the air duct 10 will not interfere with those components.

[0049] Reference Figure 4 and Figure 5There are two air ducts 10, located on opposite sides of the cover 9 along the X-axis, and both air ducts 10 extend along the Y-axis. This provides ample space between the two air ducts 10, allowing for the installation of other electrical components when the electrical device 1 is installed inside an electrical cabinet. It also avoids the problem of difficulty in disassembling the air ducts 10 after installation, making installation and maintenance of the air ducts 10 easier.

[0050] In addition, refer to Figure 1 and Figure 4 The airflow drive device 4 is installed at the vent 5, and its air inlet surface is perpendicular to the X-axis direction. The airflow drive device 4 is located at the vent 5 to ensure the heat dissipation effect of the airflow. If the airflow drive device 4 is placed in the first air duct 6, the airflow will enter the first air duct 6 in a disorderly manner after passing through the airflow drive device 4, resulting in a loss of airflow force. If the airflow drive device 4 is placed in the second air duct 7, the airflow drive device 4 will be too far away from the electrical component 2 that needs to be cooled, resulting in a reduction in heat dissipation efficiency. At the same time, the air inlet surface of the airflow drive device 4 is perpendicular to the X-axis direction, that is, the air inlet surface of the airflow drive device 4 is aligned with the orientation of the vent 5, so as to avoid the orientation of the vent 5 from obstructing the airflow.

[0051] Reference Figure 4 In the electrical device 1, the electrical component 2 includes a fixing component 13 and a heating component 14; the heating component 14 is fixedly installed on the fixing component 13 and heats up when energized; the fixing component 13 is higher than the heating component 14 in the Z-axis direction, and the portion of the fixing component 13 protruding from the top of the heating component 14 forms a step with the top of the heating component 14 on at least one side in the X-axis direction; the air duct assembly 3 is adapted to the shape of the electrical component 2, and the second air duct 7 is located at the step position between the heating component 14 and the fixing component 13 to reduce the size of the air duct assembly 3 in the X-axis direction.

[0052] Furthermore, the fixing component 13 generates heat when the heating component 14 is energized, and under the same conditions, its heat generation is less than that of the heating component 14. In this embodiment, the electrical device 1 is a reactor, referred to... Figure 6 In electrical component 2, the fixed part 13 is a magnetic core, and the heating part 14 is a coil. When electrical component 2 is working, that is, when the coil is energized, the coil will generate a large amount of heat, and the magnetic core will also generate a certain amount of heat. Under the same conditions, the heat generated by the magnetic core is less than the heat generated by the coil.

[0053] Reference Figure 6To facilitate wiring and installation, the core's dimension in the Z-axis direction is larger than the coil's dimension in the Z-axis direction. The coil can be considered as being wound around the middle section of the core in the Z-axis direction. The bottom of the core can be fixed to the housing component 17 using bolts, etc., and the top of the core is higher than the top of the coil to facilitate the placement of the terminal block. Simultaneously, since the coil is wound around the outer circumference of the core, a stepped structure is formed between the top of the coil and the periphery of the core. (Refer to...) Figure 4 The shape of the cover 9 of the air duct assembly 3 is adapted to the shape of the electrical component 2. Since the size of the air duct assembly 3 in the X-axis direction needs to be as small as possible to avoid the electrical cabinet being too large in the X-axis direction, the cover 9 has stepped portions 15 on both sides in the X-axis direction, corresponding to the stepped parts of the magnetic core and coil. The shape and size of the air duct 10 are adapted to these stepped portions 15 so that the air duct 10 can be set against the stepped portions 15. Compared with the solution of placing the vent 5 on the top of the cover 9, in this solution, the second air duct 7 is placed on the side of the electrical component 2. The vent 5 can be closer to the heat-generating component 14, and the airflow needs to travel a shorter distance from the heat-generating component 14 to the vent 5, thus resulting in lower losses and higher heat dissipation efficiency for the electrical component 2. Meanwhile, since there is a difference in the heat generation of the magnetic core and the coil, setting the vent 5 on the side of the electrical component 2 can simultaneously dissipate heat from the fixing component 13 and the heat-generating component 14. However, if the vent 5 is set on the top of the electrical component 2, the heat dissipation efficiency for the fixing component 13 will be higher, and the heat dissipation efficiency for the heat-generating component 14 will be lower.

[0054] In addition, refer to Figure 6 Multiple air gaps 16 are provided on the magnetic core and coil, extending along the Z-axis through their upper and lower surfaces, to increase the contact area between the magnetic core, coil, and the airflow within the first air duct 6. Specifically, the air gaps 16 in the coil can be formed by pre-inserting a spacer during coil winding and then removing the spacer after winding; the air gaps 16 in the magnetic core can be formed by dividing the total magnetic core into multiple smaller magnetic cores, each of which is directly connected by a connecting member, while simultaneously creating air gaps 16 between the smaller magnetic cores.

[0055] Reference Figure 3The electrical device 1 is fixedly installed on the receiving member 17. The cover 9 and the receiving member 17 cooperate to form an installation channel 18 for the installation of the air duct 10 along the Y-axis direction. The second air inlet 12 is provided on the first surface 19 of the air duct 10 perpendicular to the X-axis direction. The installation channel 18 has a second surface 20 and a third surface 21 opposite to each other along the X-axis direction. The first air outlet 11 is provided on the second surface 20. The first air outlet 11 and / or the second air inlet 12 are provided with a sealing element 22 protruding from the edge of the air outlet. The installation channel 18 and the air duct 10 are configured such that when the air duct 10 enters the installation channel... Before the air duct 10 moves to the first position, the sealing element 22 does not interfere with other components; the third surface 21 is provided with an abutting protrusion 23 pointing to the second surface 20; the abutting protrusion 23 is used to push the air duct 10 toward the second surface 20 after the air duct 10 enters the mounting channel 18 and moves to the first position, and to make the sealing element 22 tightly fit with the first surface 19, the second surface 20 or another corresponding sealing element 22 when the air duct 10 continues to move to the second position; when the air duct 10 is in the second position, the first air outlet 11 and the second air inlet 12 are sealed and connected through the sealing element 22.

[0056] Among them, the housing component 17 is the cabinet of the electrical cabinet. Figure 3 The main frame and some structural components are shown. Since the cover 9 and the air duct 10 are detachably fixedly connected, after installing the cover 9, the air duct 10 needs to be installed into the receiving member 17, ensuring that the first air outlet 11 on the cover 9 and the second air inlet 12 on the air duct 10 are properly aligned and connected to form the ventilation opening 5. Here, the first air outlet 11 and / or the second air inlet 12 are provided with a sealing element 22 protruding from the edge of the air outlet. In this embodiment, the sealing element 22 is located at the first air outlet 11. (Refer to...) Figure 4 The air duct 10 is a cuboid air duct 10, so the installation channel 18 can also be roughly regarded as a cavity with a cuboid shape, which is used for the air duct 10 to enter along the Y-axis direction.

[0057] In this embodiment, a first surface 19 forming an installation channel 18 is formed on the duct 10, and a second air inlet 12 is disposed on the first surface 19. The installation channel 18 is formed by the cooperation of a cover 9 and a receiving member 17. The cover 9 forms a second surface 20 of the installation channel 18, and a first air outlet 11 is disposed on the second surface 20. The receiving member 17 includes an installation side plate 25, which forms a third surface 21 of the installation channel 18. In other embodiments, both the second surface 20 and the third surface 21 can be disposed on the receiving member 17, or both can be disposed on the cover 9. Since the cover 9 is fixed inside the receiving member 17, and the duct 10 is connected to the heat dissipation vent of the cover 9, it is sufficient to form an installation channel 18 that can restrict the installation position of the duct 10.

[0058] It is easy to understand that since the duct 10 is rectangular, the installation channel 18 can also be roughly regarded as a rectangular cavity for the duct 10 to enter. A first air outlet 11 is provided on the second surface 20 of the installation channel 18, which is adapted to connect with the air inlet of the duct 10. That is, when the duct 10 enters the installation channel 18 and is installed in place, the air inlet of the duct 10 can connect with the first air outlet 11 of the enclosure 9, thereby connecting the air passage inside the duct 10 with the heat dissipation air duct inside the ventilation housing, so that the heat of the electrical components in the enclosure 9 can be carried away by the airflow.

[0059] Reference Figure 4 In this embodiment, the first air outlet 11 is provided with a sealing element 22 protruding from the edge of the air outlet. The sealing element 22 is a sealing strip, which is adhered to the edge of the first air outlet 11 and protrudes from the second surface 20. When the air duct 10 is installed in place, the sealing element 22 will fit tightly against the first surface 19 of the air duct 10, thereby enabling the first air outlet 11 to be sealed and connected to the air inlet of the air duct 10. It should be noted that in other embodiments, the sealing element 22 can have different installation forms. For example, the sealing element 22 can be installed on the edge of the air inlet of the air duct 10, and when the air duct 10 is installed in place, the sealing element 22 can fit tightly against the second surface 20; or, a sealing element 22 can be provided on both the edge of the air inlet of the air duct 10 and the edge of the first air outlet 11, and when the air duct 10 is installed in place, the two sealing elements 22 can fit tightly against each other.

[0060] However, regardless of where the seal 22 is placed, if the installation structure of the air duct 10 is not improved, and the first air outlet 11 and the air inlet are required to be sealed and connected after the air duct 10 is installed, then the edge of the air duct 10 away from the air outlet will inevitably interfere with the seal 22 at the first air outlet 11 during the process of inserting the air duct 10 into the installation channel 18. This will cause the seal 22 to be touched, pulled, and then fall off or be damaged by the air duct 10.

[0061] Reference Figure 1 The cover 9 is installed within the receiving member 17 at a midpoint along the Y-axis and X-axis directions. The ventilation shell of the cover 9 has shell plates on both its left and right sides, the outer surfaces of which form the second surface 20. Simultaneously, the frame of the receiving member 17 and the rear-mounted side plate 25 limit the range of movement of the air duct 10 on the opposite side of the cover 9. Thus, the cooperation between the cover 9 and the receiving member 17 forms an installation channel 18 for inserting the air duct 10 along the Y-axis. Furthermore, to prevent damage to the seal 22 at the first air outlet 11 during installation of the air duct 10, the size of the installation channel 18 is specifically set to be slightly larger than the size of the air duct 10. This ensures that the seal 22 is not touched by the rear edge of the air duct 10 during insertion into the installation channel 18. Of course, in other embodiments, such as when the seal 22 is located at the air inlet, or when the seal 22 is located at both the first air outlet 11 and the air inlet, the dimensions of the installation channel 18 and the air duct 10 also need to meet the above requirements to ensure that the air duct 10 will not touch the fixed seal 22 during installation.

[0062] The abutment protrusion 23 is provided on the third surface 21, which is a surface on the receiving member 17 opposite to the second surface 20 on the cover 9. The second surface 20 and the third surface 21 cooperate to define the range of the installation channel 18 in the X-axis direction. For the installation of the air duct 10, it is only necessary to keep the third surface 21 as far away from the second surface 20 as possible to prevent damage to the seal 22 during the installation of the air duct 10. However, for the same reason, the air duct 10 is positioned in the X-axis direction by the second surface 20 and the third surface 21. If the third surface 21 is too far away from the second surface 20, the air inlet on the air duct 10 will not be able to seal and connect with the first air outlet 11 on the cover 9. Therefore, the abutment protrusion 23 is provided. The abutment protrusion 23 protrudes from the third surface 21 toward the second surface 20. When the air duct 10 moves to the first position along the installation direction, the air duct 10 begins to touch the abutment protrusion 23. Then the air duct 10 continues to move along the installation direction, and the abutment protrusion 23 acts on the side surface of the air duct 10 facing the third surface 21. This surface is defined as the fourth surface. At this time, the abutment protrusion 23 will cause the installation direction of the air duct 10 to be slightly offset toward the second surface 20. When the air duct 10 moves to the second position along the installation direction, the overall offset of the air duct 10 toward the second surface 20 is already at a large extent. At this time, the air duct 10 is installed in place, and the seal 22 on the first air outlet 11 is tightly attached to the first surface 19. The air inlet and the first air outlet 11 can be sealed and connected.

[0063] The abutment protrusion 23 is provided with a guide portion and an abutment portion. The guide portion is provided with a guide surface that extends obliquely from the third surface 21 along the installation direction of the air duct 10 toward the second surface 20. The guide surface is adapted to abut against the air duct 10 and push the air duct 10 toward the second surface 20 after the air duct 10 moves to the first position. The abutment portion is connected to the guide portion and extends along the Y-axis direction. It is adapted to abut against the air duct 10 when the air duct 10 moves to the second position. Obviously, the guide part is located in front of the abutment part, allowing it to contact the rear end of the air duct 10 earlier. The inclined guide surface prevents the air duct 10 from being blocked by the abutment protrusion 23 when it touches it, allowing it to continue moving along the installation direction. Simultaneously, the guide part guides the air duct 10 towards the second surface 20. When the rear end of the air duct 10 passes the guide part, the abutment protrusion 23 can fully abut against the fourth surface of the air duct 10. Through the abutment of the air duct 10, when the air duct 10 moves to the second position, the seal 22 on the first air outlet 11 is tightly fitted against the first surface 19. Furthermore, the abutment part extends along the Y-axis. When the air duct 10 abuts against the abutment part, it can adjust its position by the action of the abutment part, changing its posture from slightly tilted towards the Y-axis to basically aligned with it, thus facilitating the positioning and locking of the air duct 10. In this structure, the abutment part and the second surface 20 cooperate to define the definite installation position of the air duct 10. The air duct 10 is sandwiched between the abutment part and the second surface 20, and under the action of the two, its posture is basically extended along the Y-axis direction. This makes it more accurate and convenient to position and lock the end of the air duct 10.

[0064] The electrical cabinet provided in this embodiment adopts the aforementioned heat dissipation structure for electrical devices. In this structure, the first air duct 6 and the second air duct 7 in the air duct assembly 3 are designed to allow air to enter from the bottom and exit from the side. This air intake and exhaust method allows for the acquisition of cooler air that tends to accumulate at the bottom due to its heavier weight. Simultaneously, the ventilation opening 5 is positioned along the X-axis, i.e., on the side rather than the top, allowing the second air duct 7 to be located on the side of the air duct assembly 3, reducing the height dimension of the air duct assembly 3. When the electrical device 1 is installed in the cabinet... When placed inside component 17, sufficient space can be left at the top of electrical device 1; and this design allows the vent 5 to be closer to electrical component 2, resulting in lower driving force loss of airflow drive device 4 and improved heat dissipation efficiency for electrical component 2; in addition, after entering from the bottom, the airflow in the duct assembly 3 moves upward through electrical component 2 and gradually shifts towards the position of vent 5, with less obstruction from electrical component 2 and longer contact time between airflow and surface of electrical component 2, further improving heat dissipation efficiency; therefore, the electrical device 1 has the advantages of smaller size and higher heat dissipation efficiency.

[0065] The foregoing description of the specifications and embodiments is intended to explain the scope of protection of this invention, but does not constitute a limitation on the scope of protection of this invention. Modifications, equivalent substitutions, or other improvements to the embodiments of this invention or a portion thereof that can be obtained by those skilled in the art through logical analysis, reasoning, or limited experimentation, based on the teachings of this invention or the foregoing embodiments, in conjunction with common knowledge, general technical knowledge, and / or existing technology, should all be included within the scope of protection of this invention.

Claims

1. A heat dissipation structure for an electrical device, characterized in that: The electrical device (1) includes electrical components (2), air duct assembly (3) and airflow drive device (4); The air duct assembly (3) is provided with a first air duct (6) and a second air duct (7) connected by a vent (5); the electrical component (2) is located in the first air duct (6), and the first air inlet (8) corresponding to the first air duct (6) is located at the bottom of the air duct assembly (3) in the Z-axis direction; the second air duct (7) is adapted to expel air; the vent (5) is opened along the X-axis direction; The airflow drive device (4) is installed at the vent (5), and the air inlet surface is aligned with the orientation of the vent (5). It is configured to drive the airflow through the first air inlet (8) into the first air duct (6) and then through the vent (5) into the second air duct (7) when it is in operation.

2. The heat dissipation structure for an electrical device as described in claim 1, characterized in that, The ventilation opening (5) is not lower than the electrical component (2) in the Z-axis direction; The electrical component (2) includes a fixing component (13) and a heating component (14); the heating component (14) is fixedly mounted on the fixing component (13) and heats up when energized; the fixing component (13) is higher than the heating component (14) in the Z-axis direction and protrudes from the top of the heating component (14), forming a step with the top of the heating component (14) on at least one side in the X-axis direction; the air duct assembly (3) is adapted to the shape of the electrical component (2), and the second air duct (7) is located at the step position of the heating component (14) and the fixing component (13) to reduce the size of the air duct assembly (3) in the X-axis direction.

3. The heat dissipation structure for an electrical device as described in claim 2, characterized in that, The fixing component (13) generates heat when the heating component (14) is energized, and under the same conditions, its heat generation is less than that of the heating component (14).

4. The heat dissipation structure for an electrical device as described in claim 1, characterized in that, The vent (5) is not lower than the electrical component (2) in the Z-axis direction.

5. The heat dissipation structure for an electrical device as described in claim 4, characterized in that, The ventilation opening (5) and the second air duct (7) are provided in two places respectively; the two ventilation openings (5) are arranged along the X-axis direction, or the two ventilation openings (5) are arranged along the Y-axis direction.

6. A heat dissipation structure for an electrical device as described in claim 4 or 5, characterized in that, The air duct assembly (3) includes a cover (9) and an air duct (10), which are detachably and fixedly connected; the first air duct (6) is located on the cover (9), and the second air duct (7) is located on the air duct (10); the cover (9) is provided with a first air outlet (11) opened along the X-axis direction, and the air duct (10) is provided with a second air inlet (12) opened along the X-axis direction; the first air outlet (11) and the second air inlet (12) are connected and connected to form the ventilation opening (5).

7. The heat dissipation structure for an electrical device as described in claim 6, characterized in that, There are two air ducts (10), located on both sides of the cover (9) in the X-axis direction, and both air ducts (10) extend along the Y-axis direction.

8. The heat dissipation structure for an electrical device as described in claim 6, characterized in that, The electrical device (1) is a reactor, the fixed part (13) of the electrical component (2) is a magnetic core, and the heating part (14) is a coil; the magnetic core and the coil are provided with multiple air gaps (16) that penetrate through their upper and lower surfaces along the Z-axis direction, so as to increase the contact area between the magnetic core, the coil and the airflow entering the first air duct (6).

9. A heat dissipation structure for an electrical device as described in claim 7 or 8, characterized in that, It also includes a receiving member (17); the electrical device (1) is fixedly installed on the receiving member (17), the cover (9) and the receiving member (17) cooperate to form an installation channel (18) for the installation of the air duct (10) along the Y-axis direction; the second air inlet (12) is provided on a first surface (19) of the air duct (10) perpendicular to the X-axis direction; the installation channel (18) has a second surface (20) and a third surface (21) opposite to each other along the X-axis direction; the first air outlet (11) is provided on the second surface (20); the first air outlet (11) and / or the second air inlet (12) are provided with a sealing element (22) protruding from the edge of the air outlet; the installation channel (18) and the air duct (10) are configured such that, in the air duct (10) Before entering the installation channel (18) and moving to the first position, the seal (22) does not interfere with other components; the third surface (21) is provided with an abutment protrusion (23) pointing to the second surface (20); the abutment protrusion (23) is used to push the air duct (10) toward the second surface (20) after the air duct (10) enters the installation channel (18) and moves to the first position, and make the seal (22) fit tightly with the first surface (19), the second surface (20) or the corresponding other seal (22) when the air duct (10) continues to move to the second position; when the air duct (10) is in the second position, the first air outlet (11) and the second air inlet (12) are sealed and connected through the seal (22).

10. An electrical cabinet, which adopts the heat dissipation structure for electrical devices as described in any one of claims 1-9, characterized in that: The electrical cabinet includes a housing component (17) and the electrical device (1); The electrical device (1) is installed inside the housing member (17), and the first air inlet (8) is connected to the bottom of the housing member (17) to allow air to enter from the outside; the second air duct (7) is provided with a second air outlet (24), which is exposed on the side of the housing member (17) and is used to discharge air to the outside.

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