Electric energy meter calibrating device

Abstract

The utility model provides an electric energy meter calibrating device comprising a calibrating box body, the calibrating box body comprises a first plate and a second plate which are arranged at intervals along a first direction, and at least one of the first plate and the second plate is provided with at least one first air port; the second air opening is formed in the plate body for connecting the first plate and the second plate; the supporting partition plate is arranged in the verification box body in the first direction, and the space in the verification box body is divided into a first cavity and a second cavity by the supporting partition plate; the plurality of direct-current circuit boards are connected with the supporting partition plate, the direct-current circuit boards are arranged in the first cavity, and at least one direct-current circuit board is provided with a first heating piece; the at least one first fan is arranged on the supporting partition plate, and the first fan and the first heating piece are oppositely arranged; and the plurality of alternating-current circuit boards are connected with the supporting partition plate and are arranged in the second cavity. According to the technical scheme, the direct current circuit board and the alternating current circuit board are arranged in a layered mode, the heat dissipation capacity of the device is remarkably improved, and the temperature of the whole system is kept stable.

Description

Technical Field

[0001] The utility model relates to the technical field of electric energy meter calibration, in particular to an electric energy meter calibration device. Background Art

[0002] At present, the calibration device for calibrating electricity meters usually only has a fan on the outside of the chassis, which has weak heat dissipation capacity and cannot promptly discharge the large amount of heat generated locally inside the electricity meter. When the temperature inside the calibration device is too high, the measurement accuracy of the calibration device will decrease, which cannot meet user needs. Utility Model Content

[0003] The utility model aims to at least solve the technical problems of poor heat dissipation capability and excessively high temperature during operation existing in the prior art or related art.

[0004] In view of this, an embodiment of the present invention provides an electric energy meter calibration device.

[0005] In order to achieve the above-mentioned purpose, an embodiment of the present invention provides an electric energy meter calibration device, including: a calibration box, the calibration box including a first plate and a second plate arranged at intervals along a first direction, at least one of the first plate and the second plate is provided with at least one first air outlet; a second air outlet is provided on the plate connecting the first plate and the second plate; a supporting partition is provided in the calibration box along the first direction, and the space in the calibration box is divided into a first cavity and a second cavity by the supporting partition; a plurality of DC circuit boards are connected to the supporting partition, the DC circuit boards are provided in the first cavity, and at least one DC circuit board is provided with a first heating element; at least one first fan is provided on the supporting partition, and the first fan is arranged opposite to the first heating element; a plurality of AC circuit boards are connected to the supporting partition, and the AC circuit boards are provided in the second cavity.

[0006] According to the utility model, the electric energy meter calibration device includes a calibration box and a supporting partition, a DC circuit board and an AC circuit board arranged in the calibration box, wherein the supporting partition divides the internal space of the calibration box into a first cavity and a second cavity for placing the DC circuit board and the AC circuit board respectively, and the DC and AC are arranged in layers. At the same time, a first heating element is arranged on the DC circuit board, and a first fan corresponding to it is arranged on the supporting partition. When the first fan is running, the heat generated by the first heating element can be effectively dissipated, thereby reducing the internal temperature of the calibration box. The heat dissipation effect of the internal circuit components is improved through reasonable partitioning and layered structural design, thereby maintaining the stability of high-precision measurement.

[0007] Specifically, the test box is the outer shell of the entire device and includes a first plate and a second plate spaced apart along a first direction. At least one of the first plate and the second plate is provided with a first air vent for air intake or exhaust, allowing internal heat to be removed by external airflow, ensuring that the component maintains a suitable temperature during long-term operation.

[0008] In addition, a second air vent is provided on the plate connecting the first and second plates. For example, if the first and second plates are arranged in a front-to-back direction, a second air vent can be provided on the left and right side panels. The second air vent serves as an auxiliary vent, forming an airflow channel in conjunction with the first air vent. Typically, the first air vent takes in air, and the second air vent exhausts air, or vice versa, forming a complete airflow path, effectively enhancing heat dissipation. Cool air enters through the first air vent, and hot air is exhausted through the second air vent, maintaining a stable temperature within the chassis.

[0009] Within the calibration chamber, a support partition is installed along a first direction, dividing the chamber space into two compartments: a first cavity and a second cavity. This partition enables a layered layout of the circuit boards, reducing interference between the DC and AC circuits and allowing heat to be dissipated through fans or heat dissipation structures in a targeted manner. The partition also serves as a support structure for the circuit boards, positioning the DC circuit boards in the first cavity and the AC circuit boards in the second cavity, ensuring a compact and orderly layout.

[0010] The DC circuit board is the core unit for processing DC signals. It usually operates at a large current and therefore generates more heat. The DC circuit boards are centrally arranged in the first cavity. One or more first heating elements are provided on the DC circuit board, and corresponding first fans and air ducts are provided to help better manage heat dissipation and avoid temperature accumulation.

[0011] It should be noted that the primary heat source on a DC circuit board is the primary heating element, typically consisting of power components such as field-effect transistors (MOSFETs, MOS tubes) and manganese copper wire. MOS tubes generate significant heat during power amplification and control, and manganese copper wire, as a resistive material, also generates heat when current passes through it. Properly arranging these heating elements near heat sinks and fans can effectively reduce temperature and prevent impacts on circuit performance.

[0012] By installing the first fan on the supporting partition, its position is opposite to the heating element on the DC circuit board, the airflow can be accelerated, a targeted heat dissipation effect can be achieved, and the heat dissipation efficiency can be improved, thereby quickly taking away the heat generated by the heating element, preventing the heating element from being too hot and affecting the working stability of the device.

[0013] Furthermore, the AC circuit board, connected to the support plate, is placed within the second chamber. While the AC circuit board primarily processes AC signals and generally generates relatively little heat, its separation from the DC circuit board prevents thermal and electromagnetic interference between the different circuits. The relatively isolated environment within the second chamber helps ensure the operational stability of the AC circuit board.

[0014] It can be understood that the present application significantly improves the heat dissipation capacity of the device by arranging the DC circuit board and the AC circuit board in layers and combining the use of fans and radiators. The heat is concentrated in the DC circuit part where heat is greater and is processed close to the fan and heat dissipation structure, while the AC circuit is arranged independently, reducing internal heat accumulation and keeping the temperature of the entire system stable.

[0015] The DC and AC circuits are in different chambers, effectively reducing the risk of electromagnetic interference within the system.

[0016] In some technical solutions, optionally, it further includes: a first heat dissipation element, which is arranged opposite to the at least one first fan, and the first heat dissipation element and the at least one first fan are arranged on opposite sides of the first heat dissipation element.

[0017] In this technical solution, a sandwich heat dissipation layout is formed by providing a first heat dissipation element, arranging the first heat dissipation element opposite to at least one first fan, and arranging the first heating element between the first heat dissipation element and the first fan.

[0018] The first heat sink is arranged on one side of the first heating element for absorbing and conducting heat. The first fan is arranged on the other side of the first heating element for blowing directly toward the first heating element, thereby forming an air flow channel among the fan, the heating element and the heat sink.

[0019] Among them, the first heat dissipation element can be a heat sink or radiator made of high thermal conductivity material (such as aluminum alloy, copper, etc.), which absorbs the heat generated by the heating element and quickly diffuses it to a larger surface area, helping the heating element to reduce the temperature.

[0020] The first fan is located on the other side of the heat-generating element, opposite the heat sink. This allows the fan to directly remove heat absorbed by the heat sink through airflow, achieving active heat dissipation. The airflow generated by the fan accelerates heat conduction and cooling efficiency of the heat sink, improving the heat dissipation performance of the entire system.

[0021] In some technical solutions, optionally, it further includes: at least one second fan, which is arranged on the second plate; wherein part of the second fan is located in the first cavity, and part of the second fan is located in the second cavity.

[0022] In this technical solution, the second fan is installed on the second board, and part of it is in the first cavity and part of it is in the second cavity, so that the second fan spans the first cavity where the DC circuit board is located and the second cavity where the AC circuit board is located. When the second fan is running, the air in the first cavity and the air in the second cavity can be discharged at the same time. Since there are heating elements on the DC circuit board and it may generate more heat, although the AC circuit board generates relatively less heat, it will also generate heat. This layout of the second fan helps to balance the temperature of the two chambers.

[0023] The second fan acts as an auxiliary heat sink for the DC circuit board and the first heat-generating component in the first chamber. While the first fan primarily dissipates heat from the DC circuit board's heat-generating component, the second fan further enhances air flow within the first chamber, extracting hot air that the first fan failed to exhaust in time, or from other areas within the first chamber.

[0024] Although the AC circuit board generates relatively little heat in the second chamber, the second fan still promotes air flow, promptly removing the small amount of heat generated by the AC circuit board while also preventing external heat from entering the second chamber and affecting the operating temperature of the AC circuit board.

[0025] In some technical solutions, optionally, it also includes: a second heating element, which is arranged on the side of the supporting partition close to the second plate, the second heating element includes a pin portion and a main body portion, and the pin portion is electrically connected to the DC circuit board and / or the AC circuit board; a second heat dissipation element, which is arranged on the supporting partition, and the second heat dissipation element is arranged corresponding to the second heating element.

[0026] In this technical solution, the second heating element is installed on the supporting partition, and the second heating element has a pin portion and a main body portion, wherein the pin portion is electrically connected to the circuit board, specifically can be electrically connected to at least one of the DC circuit board and the AC circuit board, and the main body portion is responsible for heat generation.

[0027] The second heating element is located at the edge of the supporting partition, close to the second board. The second heating element can be a MOS tube, power resistor, or other components. It is connected to the DC or AC circuit board, provides power control or signal amplification functions, and generates heat during operation.

[0028] By arranging the second heating element at a position close to the second plate of the supporting partition, all heating elements are avoided from being concentrated in the central area of ​​the first cavity or the second cavity, thereby preventing local overheating and improving the uniformity of heat distribution in the chassis.

[0029] The second heat sink is in direct contact with or in close proximity to the second heating element, and heat can be transferred from the heating element to the heat sink through materials such as thermal paste and thermal grease.

[0030] The second heat sink, which may be made of a material with excellent thermal conductivity, such as aluminum alloy or copper, is specifically designed to absorb and dissipate the heat generated by the second heating element. Its main function is to quickly remove heat from the heating element and dissipate it into the surrounding air through conduction, convection, and other methods.

[0031] In some technical solutions, optionally, the second heating element is a field effect tube, and the electric energy meter calibration device also includes: a power amplifier board connected to the support partition, and multiple second heating elements are provided on the power amplifier board, and the power amplifier board is arranged on the side of the second heat sink away from the support partition.

[0032] In this technical solution, a power amplifier board connected to a support partition is provided for receiving and amplifying input signals to meet the power requirements during the electricity meter calibration process. A second heating element, defined as a field-effect transistor, is provided on the power amplifier board. As part of the power amplifier board or as a separate component, the field-effect transistor is used to control and amplify current, and therefore generates a certain amount of heat during operation. The field-effect transistor serves as the second heating element, and its pins are electrically connected to the power amplifier board. A second heat sink is located near the power amplifier board and the field-effect transistor and is made of a highly efficient thermally conductive material, such as aluminum alloy or copper, to improve heat transfer efficiency.

[0033] In some technical solutions, optionally, there are two first fans, and the two first fans are arranged on two adjacent sides of the first heating element.

[0034] In this technical solution, by providing two first fans, one on each side of the first heating element, heat dissipation efficiency can be improved, ensuring that the heat generated by the first heating element can be quickly and effectively removed. By arranging the two first fans on each side of the first heating element, each first fan blows air toward the first heating element, thereby creating a stronger airflow and promoting the rapid discharge of hot air.

[0035] The high-speed rotation of the two fans can generate a strong airflow, which helps to quickly cool the first heat-generating component. Through the coordinated work of the two fans, the high-speed airflow generated can not only directly take away the heat, but also promote air circulation inside the chassis, helping to cool other components that may generate heat, thereby enhancing the overall efficiency of the heat dissipation system and ensuring that under various working conditions, the electric energy meter calibration device can be maintained within the ideal operating temperature range, thereby improving the accuracy and reliability of the measurement.

[0036] In some technical solutions, optionally, at least one second fan on the second board is arranged opposite to at least one first fan, and among the opposing first and second fans, the first fan discharges air toward the second fan.

[0037] In this technical solution, at least one second fan is arranged on the second plate, opposite to at least one first fan, and the air outlet and intake of the fan are directed to each other, forming a circulating airflow pattern. This relative setting allows the airflow generated by the first fan to flow directly to the second fan, forming an efficient air flow path.

[0038] It can be understood that the main task of the first fan is to discharge the hot air inside the chassis, especially to discharge the heat generated by the first heating element to the second fan, while the second fan extracts the air in the calibration box, including the hot air discharged by the first fan, and discharges it directly to the outside of the box to help cool other heat sources inside the chassis.

[0039] In some technical solutions, optionally, a first heat sink is provided between the first fan and the second fan relative to each other.

[0040] In this technical solution, there is a relative position relationship between at least one first fan and a second fan. At this time, the first heat sink can be arranged between the first fan and the second fan. Since the first fan blows air toward the first heat sink, and the air drawn by the second fan also flows through the first heat sink, the heat dissipation effect of the first heat sink can be effectively improved. Through the above relative position relationship, by optimizing the heat energy transfer path, the first heat sink can significantly improve the heat dissipation efficiency, especially under high load operation or extreme working conditions, ensuring that the electricity meter calibration device can be maintained within the ideal temperature range, thereby improving its stability and measurement accuracy.

[0041] In some technical solutions, optionally, the DC circuit board includes a DC current board, the first heating element is a resistance wire, and the first heating element is arranged on the DC current board.

[0042] In this technical solution, the design of the DC circuit board includes a DC current board, and explicitly states that the first heating element is a resistor wire, which is placed on the DC current board. The purpose of this design is to generate controllable heat on the DC current board. It can be understood that the DC current board is a circuit board used to process DC current in the electricity meter calibration device. It usually includes connection points, wiring terminals, etc. for receiving or outputting DC current signals. The DC current board is responsible for receiving, transmitting, or processing DC current signals.

[0043] The resistance wire, the primary heating element, is typically a long, thin conductor made of a metal material such as manganese copper or nickel-chromium alloy. When current flows through the resistance wire, it generates heat, which is related to the current and the duration of the current flow. Proper placement of the resistance wire on the DC current board effectively controls heat distribution, avoids local overheating, and improves the thermal management efficiency of the entire system.

[0044] In some technical solutions, optionally, it also includes: multiple wiring terminals, which are arranged on the first board, some of the wiring terminals are electrically connected to the DC circuit board, and some of the wiring terminals are electrically connected to the AC circuit board; and a touch screen, which is arranged on the first board.

[0045] In this technical solution, wiring terminals and a touch screen are provided on the first board to facilitate the user's use of the electric energy meter calibration device. Specifically, some of the wiring terminals are electrically connected to the DC circuit board, and some of the wiring terminals are electrically connected to the AC circuit board.

[0046] Among them, the terminal block is usually a metal interface used to achieve circuit connection and signal transmission, and has good conductivity and mechanical stability.

[0047] The wiring terminals located on the first board serve as the connection interface between the internal circuits of the energy meter calibration device (DC circuit board and AC circuit board) and external equipment (such as the energy meter being calibrated, power supply, etc.). Through these terminals, external DC or AC signals can be input into the calibration device, and the signals processed by the calibration device can also be output to external equipment for detection or analysis. This layout facilitates device connection operations, making the connection of external lines more centralized and orderly, reducing the safety risks caused by cluttered lines, and also facilitating the rapid replacement or adjustment of connected equipment during testing.

[0048] Some terminals connect to the DC circuit board, while others connect to the AC circuit board. This allows the meter verification device to handle both DC and AC signal detection tasks. Depending on the type of meter being verified (DC or AC), the appropriate terminal connections can be selected, enabling multifunctional testing of different types of meters.

[0049] The touchscreen is located on the first panel, allowing users to control various functions of the meter calibration device through touch. Typically consisting of a display and a touch-sensitive layer, the touchscreen displays various operating interfaces, test data, results, and other information, and receives user touch commands.

[0050] Users can perform operations such as setting test parameters, starting or stopping the test program, and viewing test results directly on the touch screen without the help of other external devices. At the same time, they can also view the working status information inside the device in real time, such as the display of parameters such as voltage, current, and power.

[0051] Additional aspects and advantages of the present invention will become apparent in the following description or will be understood through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1A schematic structural diagram of an electric energy meter verification device according to an embodiment of the present utility model is shown;

[0053] Figure 2 A schematic structural diagram of an electric energy meter verification device according to an embodiment of the present utility model is shown;

[0054] Figure 3 A schematic structural diagram of an electric energy meter verification device according to an embodiment of the present utility model is shown;

[0055] Figure 4 A schematic structural diagram of an electric energy meter verification device according to an embodiment of the present utility model is shown;

[0056] Figure 5 A schematic structural diagram of an electric energy meter verification device according to an embodiment of the present utility model is shown;

[0057] Figure 6 A schematic structural diagram of an electric energy meter verification device according to an embodiment of the present utility model is shown;

[0058] Figure 7 A schematic structural diagram of a second heating element according to an embodiment of the present utility model is shown.

[0059] in, Figures 1 to 7 The corresponding relationship between the reference numerals and component names is as follows:

[0060] 100: Electric energy meter calibration device; 102: Calibration box; 1022: First plate; 1024: Second plate; 1026: Plate body; 1032: First cavity; 1034: Second cavity; 104: First air outlet; 106: Second air outlet; 108: Support partition; 110: DC circuit board; 1101: DC current board; 1102: First heating element; 112: AC circuit board; 114: First fan; 116: Second fan; 118: Second heating element; 1182: Pin part; 1184: Main body; 1202: First heat sink; 1204: Second heat sink; 122: Power amplifier board; 124: Terminal block; 126: Touch screen; 1282: DC voltage board; 1284: Control board. DETAILED DESCRIPTION

[0061] In order to more clearly understand the above-mentioned purposes, features and advantages of the embodiments of the present invention, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0062] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the embodiments of the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0063] Refer to the following Figures 1 to 7 Some embodiments according to the present invention are described.

[0064] like Figure 1 As shown, this embodiment provides an electric energy meter calibration device 100, including a calibration box 102 and a support partition 108, a DC circuit board 110 and an AC circuit board 112 arranged in the calibration box 102, wherein Figure 3 、 Figure 4 and Figure 5 As shown, the supporting partition 108 divides the internal space of the calibration box 102 into a first cavity 1032 and a second cavity 1034 for placing the DC circuit board 110 and the AC circuit board 112 respectively, and the DC and AC are arranged in layers. At the same time, a first heating element 1102 is provided on the DC circuit board 110, and a corresponding first fan 114 is provided on the supporting partition 108. When the first fan 114 is running, the heat generated by the first heating element 1102 can be effectively dissipated, thereby reducing the internal temperature of the calibration box 102. The heat dissipation effect of the internal circuit components is improved through reasonable partitioning and layered structural design, thereby maintaining the stability of high-precision measurement.

[0065] Specifically, if Figure 1 and Figure 2 As shown, the test box 102 is the outer shell of the entire device and includes a first plate 1022 and a second plate 1024, spaced apart along a first direction. At least one of the first plate 1022 and the second plate 1024 is provided with a first air vent 104 for air intake or exhaust, allowing internal heat to be removed by external airflow, ensuring that the components maintain a suitable temperature during long-term operation.

[0066] In addition, if Figure 3 As shown, a second air vent 106 is also provided on the plate body 1026 connecting the first plate 1022 and the second plate 1024. For example, when the first plate 1022 and the second plate 1024 are arranged in the front-to-back direction, the second air vent 106 can be provided on the side panels in the left-to-right direction. The second air vent 106 serves as an auxiliary vent, cooperating with the first air vent 104 to form an airflow channel. Typically, the first air vent 104 takes in air, and the second air vent 106 exhausts air, or vice versa, forming a complete airflow path, effectively enhancing the heat dissipation effect. Cool air enters through the first air vent 104, and hot air is exhausted through the second air vent 106, maintaining a stable temperature within the chassis.

[0067] Within the calibration chamber 102, a support plate 108 is installed along a first direction, dividing the chamber space into two compartments: a first cavity 1032 and a second cavity 1034. This support plate 108 facilitates a layered layout of the circuit boards, reducing interference between the DC and AC circuits and allowing heat to be dissipated in a targeted manner by fans or heat dissipation structures. It is understood that the support plate 108 also serves as a support structure for the circuit boards, positioning the DC circuit board 110 in the first cavity 1032 and the AC circuit board 112 in the second cavity 1034, ensuring a compact and orderly layout.

[0068] The DC circuit board 110 is the core unit for processing DC signals. It usually operates at a large current and therefore generates more heat. The DC circuit board 110 is centrally arranged in the first cavity 1032. One or more first heating elements 1102 are provided on the DC circuit board 110, and corresponding first fans 114 and air ducts are provided to help better manage heat dissipation and avoid temperature accumulation.

[0069] It should be noted that the first heating element 1102 is the primary heat source on the DC circuit board 110 and typically includes power components such as field-effect transistors (MOSFETs) and manganese copper wire. MOSFETs generate a significant amount of heat during power amplification and control, and manganese copper wire, as a resistive material, also generates heat when current passes through it. Properly arranging these heating elements near a radiator and fan can effectively reduce temperature and avoid affecting circuit performance.

[0070] By installing the first fan 114 on the supporting partition 108, in a position opposite to the heating element on the DC circuit board 110, the air flow can be accelerated, a targeted heat dissipation effect can be achieved, and the heat dissipation efficiency can be improved, thereby quickly taking away the heat generated by the heating element and preventing the heating element from being overly hot and affecting the working stability of the device.

[0071] Furthermore, by placing an AC circuit board 112 connected to the support partition 108 within the second cavity 1034, the AC circuit board 112 primarily processes AC signals and generally generates relatively little heat. However, by separating it from the DC circuit board 110, thermal and electromagnetic interference between the different circuits is avoided. The relatively isolated environment within the second cavity 1034 helps ensure the operational stability of the AC circuit board 112.

[0072] It can be understood that the present application significantly improves the heat dissipation capacity of the device by arranging the DC circuit board 110 and the AC circuit board 112 in layers and combining the use of fans and radiators. The heat is concentrated in the DC circuit part where heat is greater and is processed close to the fan and heat dissipation structure, while the AC circuit is arranged independently, reducing internal heat accumulation and maintaining the temperature of the entire system stable.

[0073] The DC and AC circuits are in different chambers, effectively reducing the risk of electromagnetic interference within the system.

[0074] In some embodiments, optionally, as Figure 3 As shown, a first heat sink 1202 is provided, and the first heat sink 1202 is arranged opposite to at least one first fan 114 , and the first heating element 1102 is arranged between the first heat sink 1202 and the first fan 114 , forming a sandwich heat dissipation layout.

[0075] The first heat sink 1202 is arranged on one side of the first heating element 1102 (usually close to the heating surface) for absorbing and conducting heat. The first fan 114 is arranged on the other side of the first heating element 1102 and blows directly toward the first heating element 1102, thereby forming an air flow channel between the fan, the heating element and the heat sink.

[0076] Among them, the first heat sink 1202 can be a heat sink or radiator made of high thermal conductivity material (such as aluminum alloy, copper, etc.), which absorbs the heat generated by the heating element and quickly diffuses it to a larger surface area, helping the heating element to reduce the temperature.

[0077] First fan 114 is located on the other side of the heat generating element, opposite the heat sink. This allows the fan to directly remove heat absorbed by the heat sink through airflow, achieving active heat dissipation. The airflow generated by the fan accelerates heat conduction and cooling efficiency of the heat sink, improving the heat dissipation performance of the entire system.

[0078] By introducing the first heat sink 1202, the heat of the heating element can be more effectively conducted to the heat sink and quickly carried away by the fan airflow. This "sandwich" layout significantly enhances the thermal management around the heating element.

[0079] When heating elements are operating, they generate localized high temperatures due to their high power. Heat sinks, placed close to these high-temperature areas, quickly absorb the heat and dissipate it promptly through fan airflow, effectively preventing thermal damage or inaccurate measurements caused by localized overheating.

[0080] In some embodiments, optionally, as Figure 5 and Figure 6As shown, the second fan 116 is installed on the second plate 1024, and part of it is in the first cavity 1032 and part of it is in the second cavity 1034, so that the second fan 116 spans the first cavity 1032 where the DC circuit board 110 is located and the second cavity 1034 where the AC circuit board 112 is located. When the second fan 116 is running, the air in the first cavity 1032 and the air in the second cavity 1034 can be discharged together. Since there are heating elements on the DC circuit board 110 and it may generate more heat, although the AC circuit board 112 generates relatively less heat, it will also generate heat. This layout of the second fan 116 helps to balance the temperatures of the two chambers.

[0081] The second fan 116 serves as an auxiliary heat dissipation device for the DC circuit board 110 and the first heating element 1102 in the first cavity 1032. While the first fan 114 primarily dissipates heat from the heating element on the DC circuit board 110, the second fan 116 further enhances air flow within the first cavity 1032, drawing out hot air that was not promptly exhausted by the first fan 114 or hot air from other areas within the first cavity 1032.

[0082] Although the AC circuit board 112 generates relatively little heat in the second chamber 1034, the second fan 116 can still promote air flow. This can promptly remove the small amount of heat generated by the AC circuit board 112 and prevent external heat from entering the second chamber 1034 and affecting the operating temperature of the AC circuit board 112.

[0083] The operating temperature of the AC circuit board 112 is kept stable, the influence of temperature change on the AC circuit performance is reduced, and the stability of the AC circuit signal processing is improved, thereby ensuring the accuracy of the electric energy meter calibration device 100 in measuring AC-related electrical parameters.

[0084] The second fan 116 works in conjunction with the first fan 114 and other heat dissipation structures (such as the first heat sink 1202). The first fan 114 primarily dissipates heat from the heat-generating components on the DC circuit board 110, while the second fan 116 regulates the overall temperature of the two chambers, promoting macroscopic air circulation within the chassis.

[0085] In some embodiments, optionally, as Figure 7 As shown, the second heating element 118 is installed on the supporting partition 108. The second heating element 118 has a pin portion 1182 and a main body portion 1184, wherein the pin portion 1182 is electrically connected to the circuit board, specifically can be electrically connected to at least one of the DC circuit board 110 and the AC circuit board 112, and the main body portion 1184 is responsible for heat generation.

[0086] The second heating element 118 is located at the edge of the support plate 108, near the second plate 1024. The second heating element 118 can be a MOS transistor, a power resistor, or other components. It is connected to the DC circuit board or the AC circuit board 112, provides power control or signal amplification functions, and generates heat during operation.

[0087] By arranging the second heating element 118 at a position where the supporting partition 108 is close to the second plate 1024, all heating elements are avoided from being concentrated in the central area of ​​the first cavity 1032 or the second cavity 1034, thereby preventing local overheating and improving the uniformity of heat distribution in the chassis.

[0088] The second heat sink 1204 is in direct contact with or in close proximity to the second heating element 118 , and heat can be transferred from the heating element to the heat sink through materials such as thermal paste and thermal grease.

[0089] The second heat sink 1204 may be made of a material with excellent thermal conductivity, such as aluminum alloy or copper, and is specifically used to absorb and dissipate the heat generated by the second heating element 118. Its main function is to quickly remove heat from the heating element and dissipate it into the surrounding air through conduction, convection, etc.

[0090] The second heat sink 1204 cooperates with the second heating element 118 to effectively reduce the temperature rise of the element, ensuring that the heating element operates within a suitable temperature range, thereby improving the working efficiency and reliability of the heating element.

[0091] The first heating element 1102 and the second heating element 118 are each locally cooled by their respective heat sinks (e.g., first heat sink 1202 and second heat sink 1204), while the fan system manages overall airflow, forming a complete heat dissipation chain from the components to the exterior of the chassis. The addition of the second heat sink 1204 provides more heat dissipation paths throughout the system, effectively preventing heat accumulation.

[0092] The addition of the second heating element 118 and the second heat sink 1204 provides a more balanced layout of the heating elements within the enclosure. Multiple heat sinks and structures distributed across different chambers and panels ensure heat is dissipated from multiple directions, preventing localized overheating and maintaining a stable temperature throughout the system.

[0093] The second heating element 118 is connected to the DC or AC circuit board 112 through pins, generating heat during the operation of the device. The corresponding second heat sink 1204 is responsible for absorbing and quickly dissipating the heat, further improving the heat dissipation capacity of the entire system, helping to maintain the long-term operating stability of the equipment, and ensuring the measurement accuracy of the electricity meter calibration device 100 in a high-temperature working environment.

[0094] In some embodiments, a power amplifier board 122 connected to the support partition 108 is optionally provided for receiving and amplifying input signals to meet the power requirements during the electric energy meter calibration process. The second heating element 118 is defined as a field-effect transistor, which is provided on the power amplifier board 122. The field-effect transistor is a part of the power amplifier board 122 or a separate component, and is used to control and amplify current. Therefore, a certain amount of heat is generated during operation. The field-effect transistor serves as the second heating element 118, and the pins of the field-effect transistor are electrically connected to the power amplifier board 122. The second heat sink 1204 is located near the power amplifier board 122 and the field-effect transistor and is made of a high-efficiency thermally conductive material, such as aluminum alloy or copper, to improve heat transfer efficiency.

[0095] In a specific solution, the second heat sink 1204 is provided corresponding to the power amplifier board 122 and the field effect transistor, usually close to the heating element, and the heat conduction effect is enhanced by a thermal interface material (such as thermal grease).

[0096] By introducing the power amplifier board 122, using the field-effect transistor as the second heating element 118, and optimizing the heat dissipation design, the thermal management system of the energy meter calibration device 100 is significantly improved. This design not only increases the system's heat dissipation efficiency but also optimizes heat distribution, thereby ensuring device stability and measurement accuracy under high load conditions.

[0097] In some embodiments, two first fans 114 are optionally provided, one on each adjacent side of the first heating element 1102, to improve heat dissipation efficiency and ensure that the heat generated by the first heating element 1102 can be quickly and effectively removed. By providing the two first fans 114 on each adjacent side of the first heating element 1102, each first fan 114 blows air toward the first heating element 1102, thereby creating a stronger airflow and promoting the rapid discharge of hot air.

[0098] The high-speed rotation of the two fans can generate a strong airflow, which helps to quickly cool the first heating element 1102. Through the coordinated work of the two fans, the high-speed airflow generated can not only directly take away the heat, but also promote air circulation inside the chassis, helping to cool other components that may generate heat, thereby enhancing the overall efficiency of the heat dissipation system and ensuring that under various working conditions, the electricity meter calibration device 100 can be maintained within the ideal operating temperature range, thereby improving the accuracy and reliability of the measurement.

[0099] In some embodiments, optionally, at least one second fan 116 is disposed on the second plate 1024, opposite to at least one first fan 114, with the air outlet and air intake of the fan pointing toward each other, forming a circulating airflow pattern. This relative setting allows the airflow generated by the first fan 114 to flow directly to the second fan 116, forming an efficient air flow path.

[0100] It can be understood that the main task of the first fan 114 is to discharge the hot air inside the chassis, especially to discharge the heat generated by the first heating element 1102 to the second fan 116. The second fan 116 draws air from the calibration box 102, including the hot air discharged by the first fan 114, and discharges it directly to the outside of the box to help cool other heat sources inside the chassis.

[0101] In some embodiments, optionally, there is at least one first fan 114 and a second fan 116 in a relative positional relationship. In this case, the first heat sink 1202 can be set between the first fan 114 and the second fan 116. Since the first fan 114 blows air toward the first heat sink 1202, and the air drawn by the second fan 116 also flows through the first heat sink 1202, the heat dissipation effect of the first heat sink 1202 can be effectively improved. Through the above-mentioned relative positional relationship and by optimizing the heat energy transfer path, the first heat sink 1202 can significantly improve the heat dissipation efficiency, especially under high-load operation or extreme working conditions, ensuring that the electricity meter calibration device 100 can be maintained within an ideal temperature range, thereby improving its stability and measurement accuracy.

[0102] In some embodiments, optionally, as Figure 3 As shown, the design of the DC circuit board 110 includes a DC current board 1101, and explicitly states that the first heating element 1102 is a resistor wire, which is placed above the DC current board 1101. This design is intended to generate controllable heat on the DC current board 1101. It is understood that the DC current board 1101 is the circuit board in the energy meter calibration device 100 used to process DC current. It typically includes connection points, terminal blocks 124, etc. for receiving or outputting DC current signals. The DC current board is responsible for receiving, transmitting, or processing DC current signals.

[0103] The resistance wire, serving as the first heating element 1102, is typically a slender conductor made of a metal material (such as manganese copper or nickel-chromium alloy). When current flows through the resistance wire, it generates heat, with the heat generation rate being related to the current and the duration of the current flow. Proper placement of the resistance wire on the DC current board effectively controls heat distribution, avoids local overheating, and improves the thermal management efficiency of the entire system.

[0104] In addition, the design of the DC circuit board 110 may also include a DC voltage board 1282 and a control board 1284. The DC voltage board 1282 is a circuit board in the electric energy meter calibration device 100 used to process DC voltage, and the control board 1284 is used to obtain and control and adjust all electrical parameters processed by the DC circuit board 110.

[0105] In some embodiments, optionally, wiring terminals 124 and a touch screen 126 are provided on the first board 1022 to facilitate the user's use of the electricity meter calibration device 100. Specifically, a portion of the wiring terminals 124 is electrically connected to the DC circuit board 110, and a portion of the wiring terminals 124 is electrically connected to the AC circuit board 112.

[0106] The connection terminal 124 is usually a metal interface used to achieve circuit connection and signal transmission, and has good conductivity and mechanical stability.

[0107] The wiring terminals 124 located on the first plate 1022 serve as the connection interface between the internal circuits of the electric energy meter calibration device 100 (the DC circuit board 110 and the AC circuit board 112) and external devices (such as the electric energy meter being calibrated, a power supply, etc.). Through these wiring terminals 124, external DC or AC signals can be input into the calibration device, and the signals processed by the calibration device can also be output to external devices for detection or analysis. This layout facilitates the connection operation of the device, making the connection of external lines more centralized and orderly, reducing the safety hazards caused by cluttered lines, and also facilitating the rapid replacement or adjustment of connected equipment during testing.

[0108] Some of the terminals 124 are connected to the DC circuit board 110, and some are connected to the AC circuit board 112. This enables the meter verification device 100 to handle both DC and AC signal detection tasks. Depending on the type of meter being verified (DC or AC), the appropriate terminal 124 can be selected for connection, thereby achieving multifunctional detection of different types of meters.

[0109] The touch screen 126 is provided on the first plate 1022, and the user can control various functions of the energy meter calibration device 100 through touch operation. The touch screen 126 is generally composed of a display screen and a touch sensing layer, and can display various operation interfaces, test data, results and other information, and receive user touch commands.

[0110] The user can perform operations such as setting detection parameters, starting or stopping the detection program, and viewing the detection results directly on the touch screen 126 without the help of other external devices. At the same time, the user can also view the working status information inside the device in real time, such as the display of parameters such as voltage, current, and power.

[0111] In a specific embodiment, an electric energy meter calibration device 100 is defined, including: a chassis (i.e., a calibration box 102), which carries the arrangement of electrical components; a MOS tube (i.e., a second heating element 118), which feeds back and amplifies the signal; a manganese copper wire (i.e., a first heating element 1102), which is a resistance wire material; a heat sink (i.e., a first heat sink 1202 and a second heat sink 1204), which is made of aluminum alloy and is used for dissipating heat from electrical components; fans (i.e., a first fan 114 and a second fan 116), which draw air from the chassis and discharge heat; and a support plate (i.e., a support partition 108), which is used to arrange and install electrical components.

[0112] The DC current and voltage boards are placed above the support board, while the AC current and voltage boards are placed below the support board, with DC and AC arranged in separate layers. Secondly, the pins of the MOS tube, the heat-generating component, are soldered to the PCB board, and the other heat-generating surface is fixed to the heat sink. The heat-generating structural components are placed at the rear, close to the fan, with air inlets opened on the side panels. A fan is installed on the rear panel (i.e., the second panel) to draw air, forming a circulation of hot and cold air, which discharges heat from the heat-generating components out of the chassis.

[0113] In this utility model, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "plurality" refers to two or more, unless expressly limited otherwise. Terms such as "installed," "connected," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean fixed, removable, or integral; "connected" can mean directly or indirectly through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0114] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front" and "back" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0115] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0116] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An electric energy meter calibration device, characterized in that: include: A test box, the test box comprising a first plate and a second plate spaced apart along a first direction, at least one of the first plate and the second plate being provided with at least one first air outlet; a second air outlet, provided on a plate connecting the first plate and the second plate; a supporting partition, arranged in the verification box along the first direction, wherein the space in the verification box is divided into a first cavity and a second cavity by the supporting partition; A plurality of DC circuit boards connected to the supporting partition, the DC circuit boards being arranged in the first cavity, and at least one of the DC circuit boards being provided with a first heating element; at least one first fan, disposed on the supporting partition, the first fan being disposed opposite to the first heating element; A plurality of AC circuit boards are connected to the supporting partition, and the AC circuit boards are arranged in the second cavity.

2. The electric energy meter calibration device according to claim 1, characterized in that: include: The first heat dissipation element is arranged opposite to the at least one first fan, and the first heat dissipation element and the at least one first fan are arranged on two opposite sides of the first heat-generating element.

3. The electric energy meter calibration device according to claim 1, characterized in that: Also includes: at least one second fan, disposed on the second plate; Part of the second fan is located in the first cavity, and part of the second fan is located in the second cavity.

4. The electric energy meter calibration device according to claim 3, characterized in that: Also includes: a second heating element, disposed on a side of the supporting partition close to the second plate, the second heating element comprising a pin portion and a main body portion, the pin portion being electrically connected to the DC circuit board and / or the AC circuit board; The second heat dissipation element is arranged on the supporting partition, and the second heat dissipation element is arranged corresponding to the second heating element.

5. The electric energy meter calibration device according to claim 4, characterized in that: The second heating element is a field effect tube, and the electric energy meter verification device further includes: A power amplifier board is connected to the supporting baffle. A plurality of the second heating elements are provided on the power amplifier board. The power amplifier board is arranged on a side of the second heat sink away from the supporting baffle.

6. The electric energy meter calibration device according to claim 2, characterized in that: The number of the first fans is two, and the two first fans are arranged on two adjacent sides of the first heating element.

7. The electric energy meter calibration device according to claim 3, characterized in that: At least one second fan on the second plate is arranged opposite to at least one first fan, and among the first and second fans facing each other, the first fan discharges air toward the second fan.

8. The electric energy meter calibration device according to claim 7, characterized in that: A first heat sink is provided between the first fan and the second fan which are opposite to each other.

9. The electric energy meter calibration device according to any one of claims 1 to 8, characterized in that: The DC circuit board includes a DC current board. The first heating element is a resistance wire, and the first heating element is arranged on the DC current board.

10. The electric energy meter calibration device according to any one of claims 1 to 8, characterized in that: Also includes: a plurality of connection terminals, provided on the first board, some of the connection terminals being electrically connected to the DC circuit board, and some of the connection terminals being electrically connected to the AC circuit board; The touch screen is arranged on the first plate.

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