High-efficiency heat dissipation electric energy metering box

Abstract

This application relates to the technical field of electricity metering boxes and discloses an efficient heat dissipation electricity metering box, which includes a box body with a mounting base plate inside the box body. A trigger plate is slidably connected to the mounting base plate, and the trigger plate is located between the electrical components and the mounting base plate. The trigger plate includes a heat-conducting part and an insulating part. The heat-conducting part is located at the end of the insulating part near the ground. The mounting base plate is provided with a limiting structure. This application enables the electricity metering box to efficiently conduct the heat of the electrical components to the mounting base plate for heat dissipation during normal operation using the heat-conducting part. When the system encounters abnormally high temperatures, it can switch to the insulating part to prevent the abnormal heat on the mounting base plate from being transferred back to the electrical components over a large area. This prevents problems such as electrolytic capacitor life decay, LCD screen malfunction, metering inaccuracy, or even permanent damage caused by the superposition of ambient temperatures, curbs the expansion of the accident scope, and further improves the operational safety and reliability of the electricity metering box.

Description

Technical Field

[0001] This application relates to the technical field of electricity metering boxes, and in particular to an electricity metering box with high-efficiency heat dissipation. Background Technology

[0002] Electricity metering boxes are low-voltage power equipment used to install electricity meters, transformers, circuit breakers and related secondary circuits. They are widely used in residential communities, industrial and commercial buildings and outdoor power distribution sites. As a core node device at the end of the power grid, their reliability directly affects the safe and stable operation of the power system.

[0003] In related technologies, an electricity metering box includes a box body, and a mounting base plate is usually installed inside the box body. Internal equipment such as circuit breakers, electricity meters, and terminals are all fastened to the mounting base plate with bolts. Under normal working conditions, the heat generated by the heat-generating components such as circuit breakers and terminals can be transferred to the mounting base plate through contact conduction, and the heat is dissipated outward by utilizing the large heat dissipation area of ​​the mounting base plate.

[0004] In actual operation, the heat source of faulty components is usually concentrated at their terminals. This abnormal heat is directly conducted to the mounting base plate, and the local temperature at the fault point may rise to over 150°C in a short time. In severe cases, it may even develop into a sustained smoldering temperature, turning the entire mounting base plate into a high-temperature surface heat source, continuously transferring heat to other electrical components. For precision and sensitive equipment such as smart meters, the allowable ambient temperature of key components such as electrolytic capacitors, LCD screens, and metering chips is usually only below 70°C. The large-area abnormal heating from the mounting base plate, combined with the heat generated by the equipment itself, will quickly cause the internal temperature to exceed the standard, leading to an exponential decline in the lifespan of electrolytic capacitors, abnormal or even black screen display of the LCD screen, inaccurate metering, or even equipment failure or permanent damage. Summary of the Invention

[0005] In order to improve the problem that when the mounting plate of the power metering box overheats due to a local fault, the high temperature is conducted over a large area to the nearby sensitive equipment and the outer shell of the box, which leads to accelerated equipment damage and increased accident risk, this application provides a power metering box with high heat dissipation efficiency.

[0006] This application provides a high-efficiency heat dissipation power metering box, which adopts the following technical solution: A high-efficiency heat dissipation power metering box includes a box body with a mounting base plate inside. The mounting base plate is used for mounting and conducting heat to electrical components. A trigger plate is slidably connected to the mounting base plate, located between the electrical components and the mounting base plate. The trigger plate supports the electrical components and ensures they are securely mounted on the mounting base plate. The trigger plate includes a heat-conducting part and an insulating part. The heat-conducting part is located at the end of the insulating part near the ground. A limiting structure is provided on the mounting base plate to restrict the heat-conducting part between the electrical components and the mounting base plate. When the electrical components in contact with the mounting base plate reach abnormally high temperatures due to a fault, the limiting structure unlocks, the trigger plate slides towards the ground, the insulating part slides between the electrical components and the mounting base plate, and the heat-conducting part disengages from the electrical components.

[0007] By adopting the above technical solution, and by setting a sliding trigger plate on the mounting base plate, with the trigger plate having both a heat-conducting part and an insulating part, the electricity metering box can efficiently conduct the heat of the electrical components to the mounting base plate for heat dissipation during normal operation using the heat-conducting part; when the system encounters abnormally high temperatures, it can switch to the insulating part to prevent the abnormal heat on the mounting base plate from being transferred back to the electrical components over a large area, preventing problems such as electrolytic capacitor life decay, LCD screen malfunction, metering inaccuracy, or even permanent damage caused by the superposition of ambient temperatures, curbing the expansion of the accident scope, and thus further improving the operational safety and reliability of the electricity metering box.

[0008] Optionally, the limiting structure includes a metal wire that will melt when subjected to abnormal high temperature. The metal wire is located on the side of the trigger plate closer to the ground. When the metal wire melts due to abnormal high temperature, the trigger plate moves towards the ground under the action of gravity. The heat-conducting part detaches from the electrical component, and the insulating part moves between the electrical component and the mounting base plate.

[0009] By adopting the above technical solution, when electrical components such as wiring terminals experience abnormally high temperatures and reach the melting temperature of the metal wire, the metal wire located on the side of the trigger plate closest to the ground melts. After the trigger plate loses its constraint, it automatically slides towards the ground under its own gravity. This causes the heat-conducting part that originally supported the electrical component to move out of the contact area, and the insulating part slides into the space between the electrical component and the mounting base plate, forming a barrier to block heat conduction. This process requires no manual intervention or external control. It can automatically and promptly cut off the heat conduction path when a fault occurs with high temperature, preventing abnormal heat from entering the mounting base plate over a large area. This avoids the mounting base plate from becoming a high-temperature surface heat source, effectively preventing heat from spreading to nearby sensitive equipment such as smart meters and the outer shell of the box. This suppresses the ambient temperature rise of nearby equipment during a fault, further improving the fault self-protection and operational reliability of the power metering box.

[0010] Optionally, the insulating part is provided with a baffle, and the electrical component is located on the path of the baffle moving with the trigger plate; when the baffle falls with the trigger plate to abut against the electrical component, the heat-conducting part is detached from the electrical component and the insulating part is located between the electrical component and the mounting base plate.

[0011] By adopting the above technical solution, a baffle is installed on the insulating part. When the metal wire melts and the trigger plate falls, the baffle moves synchronously with the insulating part until it comes into contact with the electrical component. This ensures that the heat-conducting part is completely separated and the insulating part is precisely positioned between the electrical component and the mounting base plate. The physical blocking effect of the baffle prevents the trigger plate from accidentally retracting due to vibration or gravity, reliably locking the insulating part in the heat insulation position. This ensures that the heat conduction path is continuously and completely cut off, significantly improving the accuracy of the overheat protection action and the stability of the heat insulation state.

[0012] Optionally, the mounting base plate is provided with a detection circuit, which includes two mutually spaced detection contacts. The baffle is provided with a brittle conductive block, which contacts the two detection contacts to make the detection circuit conductive. When the baffle falls with the trigger plate to abut against the electrical component, the brittle conductive block is squeezed by the electrical component and breaks and detaches from the detection contacts. The detection circuit is disconnected and outputs a status signal indicating that the insulating part has moved between the electrical component and the mounting base plate.

[0013] By adopting the above technical solution, a brittle conductive block is set on the baffle and its detection circuit is normally connected. When the baffle falls with the trigger plate and comes into contact with the electrical component, the electrical component squeezes the brittle conductive block, causing it to break and detach from the detection contact. This causes the detection circuit to switch from being connected to disconnected, thereby automatically outputting a status signal that clearly indicates that the insulation part has been accurately moved into place and the heat conduction path has been reliably cut off. This allows maintenance personnel to remotely and in real time know the overheat protection action status and arrange maintenance in a timely manner. At the same time, this detection method is purely mechanically triggered, requiring no additional sensors, and has a simple structure. Moreover, the brittle conductive block is irreversible after breaking, avoiding false signal recovery and ensuring the accuracy and long-term stability of the status indication.

[0014] Optionally, the mounting base plate has a sliding hole, and a sliding rod is slidably connected in the sliding hole. The sliding rod is thermally conductive and is used to conduct heat away from the electrical components. The insulating part has a through hole corresponding to the sliding hole. When the baffle abuts against the electrical components, the sliding hole and the through hole are aligned, and the front end of the sliding rod passes through the through hole to abut against the electrical components and conduct heat.

[0015] By adopting the above technical solution, through holes are opened in the insulation part and cooperate with sliding holes and heat-conducting sliding rods on the mounting base plate. When the baffle falls with the trigger plate and abuts against the electrical component, the insulation part is accurately positioned. The sliding hole and the through hole are aligned, and the front end of the sliding rod passes through the through hole and abuts against the electrical component to form point contact heat conduction. Thus, while the insulation part blocks large-area heat conduction, a limited directional heat dissipation channel is established through the sliding rod, which continuously conducts the residual heat accumulated by the faulty component to the mounting base plate for dissipation. This prevents the faulty component from being further burned or causing a fire due to the inability to release heat. It not only prevents the abnormal high temperature from spreading over a large area through the mounting base plate and endangering nearby sensitive equipment, but also ensures the necessary heat dissipation of the faulty component, achieving a balance between fault isolation and controllable heat dissipation.

[0016] Optionally, the sliding hole is inclined, and the distance from the sliding hole to the ground gradually increases along the direction of the electrical component closer to the mounting base plate. The inclination angle of the through hole is consistent with the inclination angle of the sliding hole. When the sliding hole and the through hole are connected, the sliding rod slides in along the inclination direction of the through hole and abuts against the electrical component.

[0017] By adopting the above technical solution, and by tilting the sliding hole, when the insulating part moves into place and aligns the sliding hole with the through hole, the sliding rod automatically slides into the through hole and abuts against the electrical component under the action of its own gravity along the tilting direction. Reliable extension and stable contact of the sliding rod can be achieved without additional elastic driving components. This simplifies the structure and ensures the continuous effectiveness of the point contact heat conduction channel during long-term operation, avoiding sliding rod retraction or poor contact due to vibration or other factors. This ensures that the residual heat of the faulty component can be dissipated in a directional manner. At the same time, after the sliding rod abuts against the electrical component, it can maintain a stable contact pressure in the tilted posture and is not easy to loosen due to vibration or thermal expansion and contraction. This allows for the directional and limited dissipation of residual heat, avoiding the secondary risk of a sudden increase in local temperature caused by complete heat loss of the electrical component.

[0018] Optionally, the heat-conducting part is provided with a metal sheet, which abuts against the electrical component. The metal sheet will bend away from the mounting base plate when exposed to high temperature. The metal sheet is provided with a locking block, and the mounting base plate is provided with a slot for the locking block to be inserted. When the heat-conducting part is located between the electrical component and the mounting base plate, the locking block is inserted into the slot, and the trigger plate is fixed on the mounting base plate.

[0019] By adopting the above technical solution, a metal sheet that abuts against the electrical components is set on the heat-conducting part. The metal sheet bends away from the mounting base when exposed to high temperature. During normal operation, the locking block on the metal sheet inserts into the slot to reliably lock the trigger plate in the heat-conducting position. When the electrical components are abnormally hot, the metal sheet bends rapidly, causing the locking block to disengage from the slot and automatically unlock. The trigger plate then falls and switches to the heat insulation state. Thus, the heat conduction, temperature sensing and locking functions are integrated into a single component. No additional sensors or drive source are required. The structure is compact and the response is direct and reliable.

[0020] Optionally, the card block is provided with a guide slope, and the distance from the guide slope to the trigger plate gradually decreases along the direction in which the card block is inserted into the card slot. The guide slope is used to guide the card block to be inserted into the card slot.

[0021] By adopting the above technical solution, the distance from the inclined surface to the trigger plate gradually decreases along the direction of the insertion of the card block into the slot, reducing the alignment accuracy requirements between the card block and the slot. Even if there are slight deviations during assembly or slight displacements of components caused by equipment vibration, the guide inclined surface can still automatically compensate for the alignment error through the wedge effect, ensuring that the card block is stably embedded in the slot. This ensures that the trigger plate is reliably fixed on the mounting base plate under normal heat dissipation conditions, maintaining close contact between the heat-conducting part and the electrical components and ensuring the continuous unobstructed heat conduction path.

[0022] In summary, this application includes at least one of the following beneficial technical effects: By installing a sliding trigger plate on the mounting base, which has both a heat-conducting part and an insulating part, the electricity metering box can efficiently conduct heat from electrical components to the mounting base for heat dissipation during normal operation. When the system encounters abnormally high temperatures, it can switch to the insulating part to prevent the abnormal heat on the mounting base from being transferred back to the electrical components over a large area. This prevents problems such as electrolytic capacitor lifespan degradation, LCD screen malfunction, metering inaccuracy, or even permanent damage caused by the cumulative effect of ambient temperature, curbing the expansion of the accident scope and further improving the operational safety and reliability of the electricity metering box.

[0023] When electrical components such as terminals experience abnormally high temperatures and reach the melting point of the metal wire, the metal wire on the side of the trigger plate closest to the ground melts. Once the trigger plate is unrestrained, it automatically slides towards the ground under its own weight. This causes the heat-conducting part that was supporting the electrical component to move out of the contact area, while the insulating part slides between the electrical component and the mounting plate, forming a barrier to prevent heat conduction. This process requires no manual intervention or external control, automatically and promptly cutting off the heat conduction path when a fault occurs with high temperature. This prevents abnormal heat from entering the mounting plate over a large area, avoiding the mounting plate from becoming a high-temperature surface heat source. It effectively prevents heat from spreading to nearby sensitive equipment such as smart meters and the outer casing of the box, thereby suppressing the ambient temperature rise of nearby equipment during a fault and further improving the fault self-protection and operational reliability of the power metering box. Attached Figure Description

[0024] Figure 1 This is a structural schematic diagram of an embodiment of this application; Figure 2 This is an example of the embodiments in this application. Figure 1 A sectional view along line AA. Figure 3This is a partial structural diagram highlighting the trigger plate in an embodiment of this application; Figure 4 This is an exploded view of the card slot in an embodiment of this application.

[0025] Reference numerals: 1. Housing; 11. Mounting base plate; 111. Sliding hole; 112. Sliding rod; 113. Slot; 2. Trigger plate; 21. Heat-conducting part; 211. Metal sheet; 212. Locking block; 213. Guide slope; 22. Insulation part; 221. Baffle; 222. Brittle conductive block; 223. Through hole; 3. Metal wire. Detailed Implementation

[0026] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0027] This embodiment discloses a high-efficiency heat dissipation power metering box. (Refer to...) Figure 1 A high-efficiency heat dissipation electricity metering box includes a box body 1. A mounting base plate 11 is fixedly connected inside the box body 1. The mounting base plate 11 is used for mounting electrical components such as circuit breakers, electricity meters, and terminals, and can conduct and dissipate the heat generated by the electrical components to the outside. A trigger plate 2 is slidably connected to the surface of the mounting base plate 11 near the electrical components. The trigger plate 2 is located between the electrical components and the mounting base plate 11. The trigger plate 2 serves two purposes: firstly, it supports the electrical components, ensuring they are securely mounted on the mounting base plate 11; secondly, under specific conditions, it can slide relative to the mounting base plate 11 in a direction closer to or further from the ground, thereby switching the heat conduction path between the electrical components and the mounting base plate 11.

[0028] Reference Figure 1 and Figure 2 The trigger plate 2 includes a heat-conducting part 21 and an insulating part 22. The heat-conducting part 21 is integrally formed on the end face of the insulating part 22 near the ground. The insulating part 22 is made of a high-temperature resistant and heat-insulating material, such as ceramic or glass fiber reinforced plastic; the heat-conducting part 21 is made of a metal material with a high thermal conductivity, such as copper alloy or aluminum alloy, to ensure low thermal resistance when heat dissipation is required. When the trigger plate 2 is in its initial high position, the heat-conducting part 21 is located between the electrical component and the mounting base plate 11. The heat-generating area on the back of the electrical component forms good thermal contact with the mounting base plate 11 through the heat-conducting part 21, allowing heat to be efficiently dissipated and dissipated outward using the large heat dissipation area of ​​the mounting base plate 11.

[0029] Reference Figure 2The mounting base plate 11 is equipped with a limiting structure, which reliably restricts the heat-conducting part 21 between the electrical component and the mounting base plate 11 under normal operating conditions, ensuring a stable heat dissipation path. The limiting structure can sense abnormal high temperatures and automatically unlocks when the electrical component generates abnormal high temperatures due to faults such as short circuits or severe overloads, no longer obstructing the sliding of the trigger plate 2. After the limiting structure unlocks, the trigger plate 2 slides towards the ground under its own weight, causing the heat-conducting part 21 to gradually detach from the electrical component. The insulating part 22, originally located above, then slides between the electrical component and the mounting base plate 11, thermally isolating them and preventing abnormal heat from being conducted over a large area through the mounting base plate 11 to other electrical components, thus providing thermal insulation protection.

[0030] Reference Figure 2 The limiting structure includes a metal wire 3, which is located on the side of the trigger plate 2 closest to the ground. Both ends are fixedly connected to the mounting base plate 11, directly blocking the downward path of the trigger plate 2. The metal wire 3 automatically melts when encountering abnormally high temperatures exceeding the normal operating temperature range. The metal wire 3 is made of a low-melting-point alloy wire, such as a fusible alloy composed of one or more metals including tin, bismuth, lead, cadmium, and indium. When abnormally high temperatures occur inside the housing 1 or at the electrical components, the metal wire 3 reaches its melting point and melts rapidly. Its blocking effect on the trigger plate 2 disappears, opening the downward path of the trigger plate 2. The heat-conducting part 21, originally located below the electrical components, detaches from the electrical components, while the insulating part 22, originally in the upper waiting position, moves between the electrical components and the mounting base plate 11, separating them and preventing further heat conduction to the mounting base plate 11, thus providing heat insulation protection.

[0031] Reference Figure 2 and Figure 3 A baffle 221 is fixedly connected to the surface of the insulating part 22 away from the mounting base plate 11. The baffle 221 extends towards the electrical component, and the electrical component is located on the path of the baffle 221 as it moves up and down with the trigger plate 2. When the trigger plate 2 slides down to a certain position, the lower edge of the baffle 221 physically abuts against the side of the electrical component, forming a mechanical stop. At this time, the heat-conducting part 21 has completely slid out from under the electrical component, while the insulating part 22 accurately moves into the gap between the electrical component and the mounting base plate 11, completing the switching of the heat conduction path. The baffle 221 ensures the stroke accuracy and positional consistency of the trigger plate 2.

[0032] Reference Figure 2 and Figure 3A detection circuit is provided on the mounting base 11, which includes two spaced-apart detection contacts. The two detection contacts are fixed on an insulating base, which is installed on the side of the electrical component facing the baffle 221, so that the detection contacts are located between the baffle 221 and the electrical component. A brittle conductive block 222 is fixedly connected to the surface of the baffle 221 near the electrical component. The brittle conductive block 222 is made of conductive ceramic or brittle conductive polymer and other materials, which have both conductivity and the characteristic of being easily broken under force.

[0033] Reference Figure 3 In normal operation, when the baffle 221 is not in contact with the electrical components, the brittle conductive block 222 is in close contact with both detection contacts, thus activating the detection circuit. When the trigger plate 2 slides down due to high temperature, and the baffle 221 moves to contact the electrical components, the brittle conductive block 222, located between the baffle 221 and the electrical components, is subjected to strong compressive stress from the electrical components and shatters, with fragments falling off the two detection contacts. The detection circuit loses the bridging effect of the brittle conductive block 222 and changes from conductive to disconnected. This state change can be recognized by the system, which outputs a status signal indicating that the insulation part 22 has moved into place and the system has switched to insulation protection mode. For example, it can immediately trigger an audible and visual alarm or send alarm information to a remote monitoring center via the communication module, prompting maintenance personnel to perform repairs.

[0034] Reference Figure 2 A sliding hole 111 is provided on the surface of the mounting base plate 11 that abuts against the trigger plate 2. The sliding hole 111 is inclined, and the distance from the sliding hole 111 to the ground gradually increases as it approaches the mounting base plate 11. A thermally conductive sliding rod 112 is slidably connected inside the sliding hole 111. The sliding rod 112 is made of a highly thermally conductive material such as copper or aluminum. A through hole 223 corresponding to the sliding hole 111 is provided on the insulating part 22 of the trigger plate 2. The inclination angle of the through hole 223 is the same as that of the sliding hole 111.

[0035] Reference Figure 2 and Figure 3Under normal conditions, the heat-conducting part 21 is in the working position, and the positions of the sliding hole 111 and the through hole 223 are offset from each other. The sliding rod 112 is retracted inside the sliding hole 111, and its end does not contact the electrical component. When the trigger plate 2 slides down to the limit position where the baffle 221 abuts against the electrical component, the sliding hole 111 and the through hole 223 are axially aligned and connected to each other. Since both the sliding hole 111 and the through hole 223 are inclined, the sliding rod 112 slides naturally downward along the connected channel under the action of its own gravity, and its front end passes through the through hole 223 and abuts against the heating surface of the electrical component. In this way, even if the insulating part 22 blocks the main heat transfer path of the electrical component to the heat-conducting mounting base plate 11, the sliding rod 112 can still conduct some of the heat on the electrical component to the mounting base plate 11 for dissipation, forming an auxiliary heat dissipation channel to prevent the electrical component from accumulating heat completely before the fault is eliminated.

[0036] Reference Figure 4 A metal sheet 211 is fixedly connected to the side surface of the insulating part 22. The metal sheet 211 is made of a shape memory alloy sheet with thermal warping characteristics. When heated to a certain temperature threshold, it will bend in a direction away from the mounting base plate 11. A locking block 212 is fixed to the surface of the metal sheet 211 near the mounting base plate 11. A locking groove 113 is provided on the mounting base plate 11 at a position corresponding to the locking block 212.

[0037] Reference Figure 2 and Figure 4 Under normal temperature and operating conditions, the locking block 212 is inserted into the slot 113, and the locking action firmly fixes the entire trigger plate 2 to the mounting base plate 11. At this time, the trigger plate 2 cannot slide freely, achieving reliable locking. When abnormal high temperature occurs, the metal sheet 211 is first deformed by heat, generating a bending force away from the base plate. This bending action will drive the locking block 212 to be pulled out of the slot 113, thereby releasing the mechanical lock on the trigger plate 2, clearing the way for the trigger plate 2 to slide smoothly under gravity after the metal wire 3 melts or simultaneously.

[0038] Reference Figure 3 and Figure 4 The locking block 212 has a guide slope 213 on its surface near the mounting base plate 11. The distance from the guide slope 213 to the trigger plate 2 gradually decreases along the direction in which the locking block 212 is inserted into the locking slot 113, forming a wedge-shaped guide structure. When the electrical components and the trigger plate 2 are pressed onto the mounting base plate 11, the guide slope 213 will first contact the edge of the locking slot 113, converting the pressing force into a guiding force, so that the locking block 212 can be smoothly and accurately inserted into the locking slot 113 to complete the locking, improving assembly efficiency and positioning accuracy.

[0039] The implementation principle of the high-efficiency heat dissipation power metering box in this application embodiment is as follows: When the box 1 generates abnormally high temperature due to faults such as short circuits, the metal sheet 211 is heated to its deformation temperature, generating a warping force away from the mounting base plate 11. The locking block 212 is pulled out from the locking slot 113, and at the same time, the metal wire 3 melts. The trigger plate 2 slides towards the ground under its own gravity until the baffle 221 abuts against the electrical component, so that the heat-conducting part 21 slides away from the electrical component, and the insulating part 22 slides between the electrical component and the mounting base plate 11. At this time, the sliding hole 111 is aligned with the through hole 223, and the heat-conducting sliding rod 112 slides out under the action of gravity and abuts against the electrical component, forming an auxiliary heat dissipation path. At the same instant that the baffle 221 abuts against the electrical component, the brittle conductive block 222 is crushed and falls off the detection contact, the detection circuit is disconnected, and the system immediately outputs a status signal indicating that the insulating part 22 has moved between the electrical component and the mounting base plate 11, which can immediately trigger an alarm.

[0040] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0041] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the design concept of this application should be included within the protection scope of this application.

Claims

1. A high-efficiency heat-dissipation electric energy metering box, comprising a box body (1), wherein an installation bottom plate (11) is arranged in the box body (1), and the installation bottom plate (11) is used for mounting and conducting heat of electrical elements, characterized in that: A trigger plate (2) is slidably connected to the mounting base plate (11). The trigger plate (2) is located between the electrical component and the mounting base plate (11). The trigger plate (2) is used to support the electrical component to be stably installed on the mounting base plate (11). The trigger plate (2) includes a heat-conducting part (21) and an insulating part (22). The heat-conducting part (21) is located at the end of the insulating part (22) near the ground. The mounting base plate (11) is provided with a limiting structure. The limiting structure is used to restrict the heat-conducting part (21) between the electrical component and the mounting base plate (11). When the electrical component that is in contact with the mounting base plate (11) is abnormally hot due to a fault, the limiting structure is unlocked, the trigger plate (2) slides towards the ground, the insulating part (22) slides between the electrical component and the mounting base plate (11), and the heat-conducting part (21) is disengaged from the electrical component.

2. The high-efficiency heat dissipation power metering box according to claim 1, characterized in that: The limiting structure includes a metal wire (3), which will melt when subjected to abnormal high temperature. The metal wire (3) is located on the side of the trigger plate (2) close to the ground. When the metal wire (3) melts due to abnormal high temperature, the trigger plate (2) moves towards the ground under the action of gravity. The heat-conducting part (21) is separated from the electrical component, and the insulating part (22) moves between the electrical component and the mounting base plate (11).

3. The high-efficiency heat dissipation power metering box according to claim 1, characterized in that: The insulating part (22) is provided with a baffle (221), and the electrical component is located on the path of the baffle (221) moving with the trigger plate (2); when the baffle (221) falls with the trigger plate (2) to contact the electrical component, the heat-conducting part (21) is separated from the electrical component and the insulating part (22) is located between the electrical component and the mounting base plate (11).

4. The high-efficiency heat dissipation power metering box according to claim 3, characterized in that: The mounting base plate (11) is provided with a detection circuit, which includes two detection contacts spaced apart from each other. The baffle (221) is provided with a brittle conductive block (222). The brittle conductive block (222) contacts the two detection contacts to make the detection circuit conduct. When the baffle (221) falls with the trigger plate (2) to abut against the electrical component, the brittle conductive block (222) is squeezed by the electrical component and breaks and detaches from the detection contacts. The detection circuit is disconnected and outputs a status signal indicating that the insulating part (22) has moved between the electrical component and the mounting base plate (11).

5. The high-efficiency heat dissipation power metering box according to claim 3, characterized in that: The mounting base plate (11) has a sliding hole (111) and a sliding rod (112) is slidably connected in the sliding hole (111). The sliding rod (112) is thermally conductive and is used to conduct heat away from the electrical components. The insulating part (22) has a through hole (223) corresponding to the sliding hole (111). When the baffle (221) abuts against the electrical components, the sliding hole (111) and the through hole (223) are aligned. The front end of the sliding rod (112) passes through the through hole (223) and abuts against the electrical components and conducts heat.

6. The high-efficiency heat dissipation power metering box according to claim 5, characterized in that: The sliding hole (111) is inclined, and the distance from the sliding hole (111) to the ground gradually increases along the direction of the electrical component approaching the mounting base plate (11). The inclination angle of the through hole (223) is consistent with the inclination angle of the sliding hole (111). When the sliding hole (111) and the through hole (223) are connected, the sliding rod (112) slides in along the inclination direction of the through hole (223) and abuts against the electrical component.

7. The high-efficiency heat dissipation power metering box according to claim 1, characterized in that: The heat-conducting part (21) is provided with a metal sheet (211), which abuts against the electrical component. When the metal sheet (211) is exposed to high temperature, it will bend away from the mounting base plate (11). The metal sheet (211) is provided with a locking block (212), and the mounting base plate (11) is provided with a slot (113) for the locking block (212) to be inserted. When the heat-conducting part (21) is located between the electrical component and the mounting base plate (11), the locking block (212) is inserted into the slot (113), and the trigger plate (2) is fixed on the mounting base plate (11).

8. The high-efficiency heat dissipation power metering box according to claim 7, characterized in that: The card block (212) is provided with a guide slope (213). The distance from the guide slope (213) to the trigger plate (2) gradually decreases along the direction in which the card block (212) is inserted into the card slot (113). The guide slope (213) is used to guide the card block (212) to be inserted into the card slot (113).

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