Three-phase intelligent electric energy meter
The intelligent temperature control system, which combines a semiconductor cooling chip and a fan, solves the heat dissipation problem of three-phase smart energy meters in high-temperature environments, ensuring metering accuracy and equipment lifespan, and achieving efficient temperature control management.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- FUJIAN NETPOWER TECH DEV CO LTD
- Filing Date
- 2026-02-03
- Publication Date
- 2026-06-02
AI Technical Summary
Existing three-phase smart energy meters have insufficient heat dissipation capacity in high-temperature environments, leading to drift in metering accuracy, accelerated aging of electronic components, degradation of battery performance, and threats to data storage security. They also lack an active and efficient temperature control system.
It employs a combination of semiconductor cooling chips and fans to achieve directional cooling and heat dissipation through directional hot and cold airflow management. Combined with an intelligent temperature control system, it uses temperature sensors and control chips to adjust in real time to ensure that the internal temperature remains stable near the set value.
It maintains measurement accuracy in high-temperature environments, extends the lifespan of electronic components, improves data storage security, reduces maintenance labor intensity, and adapts to different installation scenarios.
Smart Images
Figure CN122138366A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of electricity meter technology, specifically a three-phase smart electricity meter. Background Technology
[0002] Three-phase smart meters, as the core of terminal sensing and metering in smart grids, need to operate reliably for extended periods in complex environments such as outdoor distribution boxes and meter wells. These environments are often accompanied by harsh conditions such as high temperature, high humidity, and large temperature differences between day and night, posing serious challenges to the metering accuracy, electronic component lifespan, and data storage security of the meters.
[0003] The current mainstream three-phase smart meters mainly rely on the following passive or inefficient methods for thermal management.
[0004] Chinese Patent Publication No. CN 217305278 U discloses a three-phase smart energy meter, relating to the field of three-phase smart energy meters. The meter includes a housing, with a connecting groove on the lower side of the front surface of the housing. A connecting block is slidably connected to the inner wall of the connecting groove. A moving groove is formed on the upper side of the inner wall of the connecting groove. Sliding grooves are formed on both the front and rear sides of the inner wall of the moving groove. First springs are fixedly connected to the lower sides of the inner walls of the two sliding grooves. Sliding blocks matching the sliding grooves are fixedly connected to the upper ends of the two first springs. A push rod is fixedly connected to the opposite side surface of the two sliding blocks. A locking mechanism is provided at the upper end of the push rod. This utility model allows for the unified ejection of the power meter's wiring, increasing installation space, facilitating operation, reducing worker workload, and increasing work efficiency.
[0005] However, the above solution still has the following problems: The method of conducting heat through a metal shell, increasing heat dissipation holes, and utilizing natural air convection for heat dissipation is severely insufficient in high-temperature, enclosed environments, and can easily lead to the accumulation of heat islands inside. Adding a small fan inside the casing can promote internal air circulation, but this method can only balance the internal temperature and cannot effectively dissipate heat to the high-temperature environment outside the casing. It will fail when the ambient temperature is higher than the operating temperature of the components, and the operation of the fan itself will also increase power consumption and the point of failure. Existing smart meters lack an active, efficient, and precise temperature control system. They are unable to proactively create a suitable "local low-temperature microenvironment" for internal core heat sources such as precision metering chips, microcontrollers, and memory when the external ambient temperature is extremely high, thus leading to: The measurement accuracy drifts at high temperatures, violating metrological regulations. Electronic components age faster, leading to a higher failure rate and a shorter overall lifespan. Batteries experience accelerated performance degradation and shorter power recovery time during power outages at high temperatures. The data storage unit experienced bit errors due to high temperature, threatening the security of billing data.
[0006] Therefore, the present invention requires the design of a three-phase smart energy meter to solve the above-mentioned problems. Summary of the Invention
[0007] The purpose of this invention is to provide a solution that integrates into the limited space of an electricity meter to achieve directional, low-power, and intelligent temperature control, thereby solving the problems mentioned in the background art.
[0008] To achieve the above objectives, the present invention provides the following technical solution: a three-phase smart energy meter, comprising a housing: A display screen mounting plate is installed on the outside of the housing. An LCD display screen is installed on the outside of the display screen mounting plate. An energy meter controller is installed on the outside of the display screen mounting plate and below the LCD display screen. An LED indicator panel is installed on the outside of the energy meter controller. A precision current transformer is installed inside the energy meter controller. Equally spaced batteries are installed on both sides of the precision current transformer. A local communication interface is installed at the bottom of the energy meter controller. A gas baffle is installed inside the housing. A semiconductor mounting frame is installed inside the housing and below the gas baffle. A semiconductor cooling chip is installed inside the semiconductor mounting frame. A semiconductor cooling end is fixedly connected to one side of the semiconductor cooling end. A first fan bracket is installed on the side of the semiconductor cooling end near the electricity meter controller. A first mounting fan is installed inside the first fan bracket. A semiconductor heating end is fixedly connected to the other side of the semiconductor cooling chip. A second fan bracket is installed on the outside of the housing to cooperate with the semiconductor heating end. A second mounting fan is installed inside the second fan bracket. A side positioning plate is fixedly connected to the side of the housing away from the display screen mounting plate. A positioning rod is fixedly connected to the outer side of the side positioning plate. The positioning rod has an L-shaped structure for easy hanging installation. An auxiliary positioning frame is installed at the bottom of the housing. Two symmetrically distributed LED indicator lights are installed on the outer side of the auxiliary positioning frame.
[0009] In a preferred embodiment of the present invention, the outer side of the display screen mounting plate is threaded with first positioning bolts that are evenly distributed and extend to the inner wall of the housing. The multiple first positioning bolts are used to reinforce the connection between the display screen mounting plate and the housing. The outer side of the energy meter controller is threaded with second positioning bolts that are evenly distributed and extend to the inner wall of the display screen mounting plate. The multiple second positioning bolts are used to reinforce the connection between the display screen mounting plate and the energy meter controller. The multiple bolt installation method facilitates quick disassembly and assembly of local positions, reducing the labor intensity of daily maintenance.
[0010] In a preferred embodiment of the present invention, a slot for mounting a second fan bracket is installed on the side of the housing away from the electricity meter controller. A second mounting fan is installed inside the second fan bracket. A semiconductor heating end is installed on the side of the semiconductor mounting frame away from the semiconductor cooling chip. A heat sink with equal spacing is fixedly connected to one side of the semiconductor heating end. The heat sink is located on one side of the second fan bracket. By operating the second fan bracket, the heat generated by the semiconductor heating end and the heat absorbed by the heat sink are extracted in time, thereby extending the service life of the equipment. Both the second fan bracket and the first mounting fan are bidirectional fans, and the corresponding operating mode can be switched as needed during operation.
[0011] In a preferred embodiment of the present invention, an internal memory is installed inside the housing and above the gas partition. Wiring terminals extending into the internal memory are installed outside the side positioning plate and below the multiple positioning rods. The multiple positioning rods are used for placement when the whole device is suspended. The multiple wiring terminals are connected to the internal memory to ensure that it can be connected to external power equipment for normal charging and power supply.
[0012] In a preferred embodiment of the present invention, a microcontroller is installed inside the housing and below the semiconductor mounting frame. A temperature sensor matching the semiconductor mounting frame is fixedly connected to the bottom of the gas partition. The temperature sensor is used to monitor and process temperature changes in real time. The microcontroller is used to provide auxiliary support for the semiconductor mounting frame as a whole and to provide the application program for the whole device to run.
[0013] In a preferred embodiment of the present invention, a first filter screen for use with a first fan is installed on the outer side of the first fan frame, and a fifth positioning bolt extending to the inner wall of the housing is threaded around the outer perimeter of the first fan frame. The multiple fifth positioning bolts are used to reinforce the first fan frame and the housing, and facilitate disassembly and cleaning.
[0014] In a preferred embodiment of the present invention, a second filter screen is installed on the outer side of the second fan frame to cooperate with the second fan mounting. The outer perimeter of the second fan frame is threaded with a sixth positioning bolt extending to the inner wall of the housing. The multiple sixth positioning bolts are used to reinforce the second fan frame and the housing, and facilitate disassembly and cleaning.
[0015] In a preferred embodiment of the present invention, a wireless transceiver is fixedly connected to the top of the housing. A main control board is fixedly connected inside the wireless transceiver, and a control chip is fixedly connected to the outside of the main control board. The LCD screen, wireless transceiver, internal memory, terminal block, energy meter controller, LED indicator panel, precision transformer, battery, local communication interface, LED indicator, microcontroller, thermoelectric cooler, thermoelectric cooler, first mounting fan, temperature sensor, thermoelectric heating end, and second mounting fan are all electrically connected to the control chip. The control chip is used to control the operation of the LCD screen, wireless transceiver, internal memory, terminal block, energy meter controller, LED indicator panel, precision transformer, battery, local communication interface, LED indicator, microcontroller, thermoelectric cooler, thermoelectric cooler, first mounting fan, temperature sensor, thermoelectric heating end, and second mounting fan, thereby realizing unified management of power equipment.
[0016] In a preferred embodiment of the present invention, auxiliary positioning plates are fixedly connected to both sides of the auxiliary positioning frame, and a fourth positioning bolt is threaded into the interior of each of the two auxiliary positioning plates. The auxiliary positioning plates and the fourth positioning bolts are used to reinforce the connection between the overall equipment and the side items when the equipment is placed, thereby improving the stability of the overall equipment during installation. One end of each LED indicator is connected to the corresponding auxiliary positioning plate.
[0017] In a preferred embodiment of the present invention, the auxiliary positioning frame is equipped with equidistantly distributed limiting plates inside, and a third positioning bolt is threaded between every two limiting plates. The third positioning bolt is used to reinforce the connection between the overall equipment and the side items when the overall equipment is placed, so as to facilitate quick disassembly and removal of the overall device.
[0018] Compared with the prior art, the beneficial effects of the present invention are: This invention comprises a housing, an energy meter controller, and an auxiliary positioning frame. It consists of a semiconductor cooling chip with its cooling end facing inwards and its heating end facing outwards. The cooling end is equipped with a first fan to blow cooling energy towards the internal heat source; the heating end is equipped with a heat sink and a second fan. The heat generated by the semiconductor cooling chip accumulates at the heating end. When the second fan is activated, it draws in external air, which flows through the heat sink to remove its heat and is then discharged outside the housing through an air duct. A gas baffle plays a crucial role in isolating the air duct, preventing short-circuiting and mixing of hot and cold air, and ensuring cooling efficiency. Multiple sets of positioning bolts, such as the first, second, fifth, and sixth positioning bolts, allow for independent disassembly and assembly of the display screen, controller, and fan frame, facilitating maintenance. The L-shaped positioning rod is used for wall mounting. The auxiliary positioning bracket, together with the third and fourth positioning bolts, is used for guide rail installation or fixing to adjacent equipment, adapting to different installation scenarios. Multiple second positioning bolts are used to reinforce the connection between the display screen mounting plate and the energy meter controller. The multiple bolt installation method facilitates quick disassembly and assembly of local positions, reducing the labor intensity of daily maintenance. Multiple fifth positioning bolts are used to reinforce the installation of the first fan frame and the housing, facilitating disassembly and cleaning. Multiple sixth positioning bolts are used to reinforce the installation of the second fan frame and the housing, facilitating disassembly and cleaning. The third positioning bolt is used to provide secondary reinforcement connection with side items when the overall equipment is placed, facilitating quick disassembly and assembly to remove the entire device. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of a three-phase smart energy meter according to the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of a three-phase smart energy meter according to the present invention. Figure 2 ; Figure 3 The internal structure of a three-phase smart energy meter according to the present invention Figure 1 ; Figure 4 The internal structure of a three-phase smart energy meter according to the present invention Figure 2 ; Figure 5 This invention relates to an accessory for a three-phase smart energy meter. Figure 1 Enlarged schematic diagram of the structure at point A in the diagram; Figure 6 This invention relates to an accessory for a three-phase smart energy meter. Figure 3 Enlarged schematic diagram of the structure at point B in the diagram.
[0020] In the picture: 1. Housing; 11. Display screen mounting plate; 12. LCD display screen; 13. First positioning bolt; 14. Wireless signal transceiver; 15. Side positioning plate; 16. Positioning rod; 17. Internal memory; 18. Wiring terminal; 19. Gas baffle; 2. Energy meter controller; 21. LED indicator panel; 22. Second positioning bolt; 23. Precision transformer; 24. Storage battery; 25. Local communication interface; 3. Auxiliary positioning frame; 31. Limiting plate; 32. Third positioning bolt; 33. Auxiliary positioning piece; 34. Fourth positioning bolt; 35. LED indicator; 36. Microcontroller; 4. Semiconductor mounting frame; 41. Semiconductor cooling chip; 42. Semiconductor cooling end; 43. First fan bracket; 44. First mounting fan; 45. First filter; 46. Fifth positioning bolt; 47. Temperature sensor; 5. Semiconductor heating end; 51. Heat sink; 52. Second fan bracket; 53. Second mounting fan; 54. Sixth positioning bolt; 55. Second filter. Detailed Implementation
[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0022] Please see Figures 1-6 The present invention provides a technical solution: a three-phase smart energy meter, including a housing 1, a display screen mounting plate 11 installed on the outside of the housing 1, an LCD display screen 12 installed on the outside of the display screen mounting plate 11, an energy meter controller 2 installed on the outside of the display screen mounting plate 11 and below the LCD display screen 12, an LED indicator panel 21 installed on the outside of the energy meter controller 2, a precision current transformer 23 installed inside the energy meter controller 2, batteries 24 evenly distributed on both sides of the precision current transformer 23, and a local communication interface 25 installed at the bottom of the energy meter controller 2; In this design, a gas baffle 19 is installed inside the housing 1. A semiconductor mounting frame 4 is installed inside the housing 1 and below the gas baffle 19. A semiconductor cooling chip 41 is installed inside the semiconductor mounting frame 4. A semiconductor cooling end 42 is fixedly connected to one side of the semiconductor cooling chip 41. A first fan bracket 43 is installed on the side of the semiconductor cooling end 42 near the power meter controller 2. A first mounting fan 44 is installed inside the first fan bracket 43. A semiconductor heating end 5 is fixedly connected to the other side of the semiconductor cooling chip 41. A second fan bracket 52 is installed on the outside of the housing 1 to cooperate with the semiconductor heating end 5. A second mounting fan 53 is installed inside the second fan bracket 52. In this design, a side positioning plate 15 is fixedly connected to the side of the housing 1 away from the display screen mounting plate 11. An equally spaced positioning rod 16 is fixedly connected to the outside of the side positioning plate 15. The positioning rod 16 has an L-shaped structure, which facilitates hanging installation. An auxiliary positioning frame 3 is installed at the bottom of the housing 1. Two symmetrically distributed LED indicator lights 35 are installed on the outside of the auxiliary positioning frame 3.
[0023] Please see Figures 1-6 In this solution, the outer side of the display screen mounting plate 11 is threaded with first positioning bolts 13 that are evenly distributed and extend to the inner wall of the housing 1. Multiple first positioning bolts 13 are used to reinforce the connection between the display screen mounting plate 11 and the housing 1. The outer side of the energy meter controller 2 is threaded with second positioning bolts 22 that are evenly distributed and extend to the inner wall of the display screen mounting plate 11. Multiple second positioning bolts 22 are used to reinforce the connection between the display screen mounting plate 11 and the energy meter controller 2. The multiple bolt installation method facilitates quick disassembly and assembly of local positions, reducing the labor intensity of daily maintenance.
[0024] In this design, the side of the housing 1 furthest from the power meter controller 2 is fitted with a slot for mounting the second fan bracket 52. The second fan bracket 52 houses the second mounting fan 53. The semiconductor mounting frame 4 furthest from the semiconductor cooling chip 41 is fitted with a semiconductor heating end 5. A heat sink 51 is fixedly connected to one side of the semiconductor heating end 5. The heat sink 51 is located on one side of the second fan bracket 52. By operating the second fan bracket 52, the heat generated by the semiconductor heating end 5 and the heat absorbed by the heat sink 51 are extracted in time, thereby extending the service life of the equipment. Both the second fan bracket 52 and the first mounting fan 44 are bidirectional fans, and the corresponding operating mode can be switched as needed during operation.
[0025] Please see Figures 1-5 In this design, an internal memory 17 is installed inside the housing 1 and above the gas baffle 19. Wiring terminals 18 extending into the internal memory 17 are installed outside the side positioning plate 15 and below the multiple positioning rods 16. The multiple positioning rods 16 are used for placement when the whole device is suspended. The multiple wiring terminals 18 are connected to the internal memory 17 to ensure that it can be connected to external power equipment for normal charging and power supply.
[0026] In this design, a microcontroller 36 is installed inside the housing 1 and below the semiconductor mounting frame 4. A temperature sensor 47 matching the semiconductor mounting frame 4 is fixedly connected to the bottom of the gas partition 19. The temperature sensor 47 is used for real-time monitoring and processing of temperature changes. The microcontroller 36 is used to provide auxiliary support for the semiconductor mounting frame 4 as a whole, while also providing support for the application program of the whole device.
[0027] Please see Figures 1-6In this solution, a first filter screen 45 is installed on the outside of the first fan frame 43 to cooperate with the first mounting fan 44. The outer perimeter of the first fan frame 43 is threaded with fifth positioning bolts 46 extending to the inner wall of the housing 1. Multiple fifth positioning bolts 46 are used to reinforce the first fan frame 43 and the housing 1, and facilitate disassembly and cleaning.
[0028] In this design, a second filter 55 is installed on the outer side of the second fan bracket 52 to cooperate with the second mounting fan 53. The outer perimeter of the second fan bracket 52 is threaded with a sixth positioning bolt 54 extending to the inner wall of the housing 1. Multiple sixth positioning bolts 54 are used to reinforce the second fan bracket 52 and the housing 1, and facilitate disassembly and cleaning.
[0029] Please see Figures 1-6 In this design, a wireless transceiver 14 is fixedly connected to the top of the housing 1. A main control board is fixedly connected inside the wireless transceiver 14, and a control chip is fixedly connected to the outside of the main control board. The LCD screen 12, wireless transceiver 14, internal memory 17, terminal block 18, energy meter controller 2, LED indicator panel 21, precision transformer 23, battery 24, local communication interface 25, LED indicator 35, microcontroller 36, semiconductor cooling chip 41, semiconductor cooling terminal 42, first mounting fan 44, temperature sensor 47, semiconductor heating terminal 5, and second mounting fan 53 are all electrically connected to the control chip. The control chip is used to control the LCD screen. The system comprises a screen 12, a wireless transceiver 14, an internal memory 17, a terminal block 18, an energy meter controller 2, an LED indicator panel 21, a precision transformer 23, a storage battery 24, a local communication interface 25, an LED indicator 35, a microcontroller 36, a semiconductor cooling chip 41, a semiconductor cooling end 42, a first mounting fan 44, a temperature sensor 47, a semiconductor heating end 5, and a second mounting fan 53. This system enables unified management of electrical equipment. The precision transformer 23 and the temperature sensor 47 measure corresponding environmental parameters, convert them into signals, and send them to the control chip. The control chip receives and processes the signals, generating corresponding control signals based on a preset control algorithm.
[0030] Please see Figures 1-5 In this solution, auxiliary positioning plates 33 are fixedly connected to both sides of the auxiliary positioning frame 3. The internal threads of the two auxiliary positioning plates 33 are connected to the fourth positioning bolts 34. The auxiliary positioning plates 33 and the fourth positioning bolts 34 are used to reinforce the connection between the overall equipment and the side items when the equipment is placed, thereby improving the stability of the overall equipment during installation. One end of each LED indicator 35 is connected to the corresponding auxiliary positioning plate 33.
[0031] In this solution, the auxiliary positioning frame 3 is equipped with equidistantly distributed limiting plates 31. A third positioning bolt 32 is threaded between every two limiting plates 31. The third positioning bolt 32 is used to reinforce the connection between the overall equipment and the items on the side when the overall equipment is placed, so as to facilitate quick disassembly and removal of the overall device.
[0032] Please see Figures 1-6 The working principle of this invention is as follows: The device consists of a housing 1, an electricity meter controller 2, and an auxiliary positioning frame 3. During use: Composition and layout: Core temperature control: It consists of a semiconductor cooling chip 41, with its cooling end 42 facing inward and its heating end 5 facing outward. The cooling end is equipped with a first fan 44 to blow cold air to the internal heat source; the heating end is equipped with a heat sink 51 and a second fan 53 to quickly dissipate heat to the outside of the meter. Controlled object: The main heat-generating components of the electricity meter controller 2, including precision current transformer 23, microcontroller 36, and internal memory 17, are concentrated in the area above the gas baffle 19, which is directly opposite the air outlet of the cooling end. Intelligent control loop: Temperature sensor 47 monitors the temperature of the controlled area in real time, and the signal is transmitted to the control chip. The control chip dynamically adjusts the power of the semiconductor cooling chip and the fan speed according to the preset temperature threshold and algorithm. Working process under high temperature conditions: Temperature sensing: When the internal temperature of the electricity meter rises due to high ambient temperature or its own operating heat, the temperature sensor 47 detects that the temperature exceeds the set upper limit, such as 45°C. Cooling starts: The control chip sends a command to start the semiconductor cooling chip 41 and the first fan 44. The cooling end 42 begins to absorb heat, and the first fan 44 forces the cold air to blow the core areas such as the power meter controller 2. Heat transfer and exhaust: At the same time, the heat generated by the semiconductor cooling chip is concentrated at the heating end 5. The second fan 53 is started, drawing in the outside air, which flows through the heat sink 51 to carry away its heat, and is exhausted outside the housing 1 through the air duct. The gas baffle 19 plays a key role in air duct isolation, preventing the mixing of hot and cold airflows by short circuit, and ensuring cooling efficiency. Precise temperature control and energy saving: Based on feedback from the temperature sensor, the control chip uses algorithms such as PID to adjust the power of the cooling chip, such as PWM control, to stabilize the internal temperature near the set value. When the temperature drops to the lower limit, the system enters a low-power maintenance mode or shuts down. Dual heat dissipation protection: Both the first and second fans are bidirectional fans, which can switch the airflow direction as needed. For example, in winter or low-temperature environments, the fans can be reversed to conduct natural airflow for heat exchange or dehumidification, improving environmental adaptability. Auxiliary functions and structure: Modular installation: Through multiple groups of positioning bolts such as the first, second, fifth, and sixth positioning bolts, components such as the display screen, controller, and fan bracket can be independently disassembled and assembled, facilitating maintenance. Multiple installation methods: Provide an L-shaped positioning plug 16 for wall mounting, and an auxiliary positioning bracket 3 in combination with the third positioning bolt 32 and the fourth positioning bolt 34 for rail mounting or fixing to adjacent devices, adapting to different installation scenarios. Unified intelligent management: The control chip is used to control the operation of the liquid crystal display screen 12, wireless signal transceiver 14, internal memory 17, wiring terminal 18, electric energy meter controller 2, LED indicator panel 21, precision current transformer 23, storage battery 24, local communication interface 25, LED indicator light 35, microcontroller 36, semiconductor refrigeration chip 41, semiconductor refrigeration end 42, first installation fan 44, temperature sensor 47, semiconductor heating end 5, and second installation fan 53, achieving unified management of power equipment. The precision current transformer 23 and temperature sensor 47 measure the corresponding environmental parameters, convert them into signals and send them to the control chip. The control chip receives the signals and processes them, generating corresponding control signals according to the preset control algorithm to achieve status monitoring and remote parameter setting. After adopting this solution, it continuously works for 24 hours in a constant temperature box at an ambient temperature of 70°C. The temperature in the core area of the electric energy meter measurement remains at 50±2°C, and the change in measurement error does not exceed 0.1%. In contrast, the error change of the control table without adopting this solution exceeds 0.5%. The control chip pre-stores a temperature control strategy, specifically: Set temperature thresholds T_high such as 50°C and T_low such as 40°C. When the detection value T of the temperature sensor 47 is greater than T_high, the control chip drives the semiconductor refrigeration chip 41 to the rated power in PWM mode and starts the first fan 44 and the second fan 53 to the highest speed. When T_high ≥ T ≥ T_low, the control chip reduces the PWM duty cycle of the refrigeration chip and the fan speed according to a proportion such as (T - T_low) / (T_high - T_low)*100%. When T < T_low, the semiconductor refrigeration chip and the fan are turned off, and only temperature monitoring is maintained. In addition, the control chip is linked with the measurement function of the electric energy meter. When it detects that the electric energy meter is in a large-current measurement state, that is, its own heat generation intensifies, active cooling is triggered in advance. Multiple second positioning bolts 22 are used to strengthen the connection between the display screen mounting plate 11 and the electric energy meter controller 2. The multi-group bolt installation method facilitates the quick disassembly and assembly of local positions, reducing the labor intensity of daily maintenance. Multiple fifth positioning bolts 46 are used to strengthen the installation of the first fan bracket 43 and the housing 1, facilitating disassembly and cleaning. Multiple sixth positioning bolts 54 are used to strengthen the installation of the second fan bracket 52 and the housing 1, facilitating disassembly and cleaning. The third positioning bolt 32 is used to perform secondary strengthening connection with side items when the overall device is placed, facilitating quick disassembly and removal of the overall device.
[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A three-phase smart energy meter, comprising a housing (1), characterized in that: A display screen mounting plate (11) is installed on the outside of the housing (1). A liquid crystal display screen (12) is installed on the outside of the display screen mounting plate (11). An energy meter controller (2) is installed on the outside of the display screen mounting plate (11) and below the liquid crystal display screen (12). An LED indicator panel (21) is installed on the outside of the energy meter controller (2). A precision current transformer (23) is installed inside the energy meter controller (2). Equally spaced storage batteries (24) are installed on both sides of the precision current transformer (23). A local communication interface (25) is installed at the bottom of the energy meter controller (2). A gas baffle (19) is installed inside the housing (1). A semiconductor mounting frame (4) is installed inside the housing (1) and below the gas baffle (19). A semiconductor cooling chip (41) is installed inside the semiconductor mounting frame (4). A semiconductor cooling end (42) is fixedly connected to one side of the semiconductor cooling chip (41). A first fan bracket (43) is installed on the side of the semiconductor cooling end (42) near the power meter controller (2). A first mounting fan (44) is installed inside the first fan bracket (43). A side positioning plate (15) is fixedly connected to the side of the housing (1) away from the display screen mounting plate (11). Positioning rods (16) are fixedly connected to the outside of the side positioning plate (15) at equal intervals. An auxiliary positioning frame (3) is installed at the bottom of the housing (1).
2. The three-phase smart energy meter according to claim 1, characterized in that: The outer side of the display mounting plate (11) is threaded with first positioning bolts (13) that are evenly distributed and extend to the inner wall of the housing (1). Multiple first positioning bolts (13) are used to reinforce the connection between the display mounting plate (11) and the housing (1). The outer side of the power meter controller (2) is threaded with second positioning bolts (22) that are evenly distributed and extend to the inner wall of the display mounting plate (11). Multiple second positioning bolts (22) are used to reinforce the connection between the display mounting plate (11) and the power meter controller (2).
3. The three-phase smart energy meter according to claim 2, characterized in that: A semiconductor heating end (5) is fixedly connected to the other side of the semiconductor cooling chip (41). A second fan bracket (52) for use with the semiconductor heating end (5) is installed on the outside of the housing (1). A second mounting fan (53) is installed inside the second fan bracket (52). A slot for mounting the second fan bracket (52) is installed on the side of the housing (1) away from the electricity meter controller (2). A second mounting fan (53) is installed inside the second fan bracket (52). A semiconductor heating end (5) is installed on the side of the semiconductor mounting frame (4) away from the semiconductor cooling chip (41). A heat sink (51) is fixedly connected to one side of the semiconductor heating end (5). The heat sink (51) is located on one side of the second fan bracket (52).
4. The three-phase smart energy meter according to claim 3, characterized in that: An internal memory (17) is installed inside the housing (1) and above the gas partition (19). A wiring terminal (18) extending into the internal memory (17) is installed outside the side positioning plate (15) and below the multiple positioning rods (16). The multiple positioning rods (16) are used for placement operation when the whole device is suspended. The multiple wiring terminals (18) are connected to the internal memory (17).
5. The three-phase smart energy meter according to claim 4, characterized in that: A microcontroller (36) is installed inside the housing (1) and below the semiconductor mounting frame (4). A temperature sensor (47) matching the semiconductor mounting frame (4) is fixedly connected to the bottom of the gas partition (19). The temperature sensor (47) is used for real-time monitoring and processing of temperature changes.
6. The three-phase smart energy meter according to claim 4, characterized in that: The first fan frame (43) is equipped with a first filter screen (45) for use with the first mounting fan (44). The outer perimeter of the first fan frame (43) is threaded with fifth positioning bolts (46) extending to the inner wall of the housing (1). Multiple fifth positioning bolts (46) are used to reinforce the first fan frame (43) and the housing (1).
7. The three-phase smart energy meter according to claim 1, characterized in that: The second fan bracket (52) is equipped with a second filter screen (55) for use with the second mounting fan (53). The second fan bracket (52) is threaded around its outer perimeter with sixth positioning bolts (54) extending to the inner wall of the housing (1). Multiple sixth positioning bolts (54) are used to reinforce the second fan bracket (52) and the housing (1).
8. The three-phase smart energy meter according to claim 5, characterized in that: Two symmetrically distributed LED indicator lights (35) are installed on the outside of the auxiliary positioning frame (3). A wireless transceiver (14) is fixedly connected to the top of the housing (1). A main control board is fixedly connected inside the wireless transceiver (14). A control chip is fixedly connected to the outside of the main control board. The LCD screen (12), wireless transceiver (14), internal memory (17), terminal block (18), energy meter controller (2), LED indicator panel (21), precision transformer (23), battery (24), local communication interface (25), LED indicator light (35), microcontroller (36), semiconductor cooling chip (41), semiconductor cooling end (42), first mounting fan (44), temperature sensor (47), semiconductor heating end (5), and second mounting fan (53) are all electrically connected to the control chip.
9. The three-phase smart energy meter according to claim 8, characterized in that: Both sides of the auxiliary positioning frame (3) are fixedly connected with auxiliary positioning pieces (33), and the interior of each of the two auxiliary positioning pieces (33) is threaded with a fourth positioning bolt (34). One end of each LED indicator (35) is connected to the corresponding auxiliary positioning piece (33).
10. The three-phase smart energy meter according to claim 8, characterized in that: The auxiliary positioning frame (3) is equipped with equidistant limiting plates (31) inside, and a third positioning bolt (32) is threaded between every two limiting plates (31).