Electricity metering box

Abstract

The application relates to an electric energy metering box which comprises a box body, an electric energy meter, a circuit breaker and a cover, one side of the box body is provided with a fixing surface, the box body is provided with a metering chamber and a switch chamber, the electric energy meter is fixedly connected to the inner wall of the metering chamber, the circuit breaker is fixedly connected to the inner wall of the switch chamber, the cover is fixedly connected to the fixing surface, the cover and the fixing surface enclose a heat dissipation channel, the cover is used for being fixed on a wall surface, a plurality of heat dissipation openings are arranged on the fixing surface, the metering chamber is communicated with the heat dissipation channel through the heat dissipation openings, and the switch chamber is communicated with the heat dissipation channel through the heat dissipation openings. The heat dissipation channel is hiddenly arranged at the back of the box body by utilizing the fixed mounting relationship between the cover and the wall surface, heat dissipation openings with large areas are not arranged on the front or side surface of the box body, the heat dissipation performance and the appearance neatness are not affected, heat generated by internal heating elements is introduced into the heat dissipation channel through the heat dissipation openings, the heat is effectively led out along the wall surface, and heat dissipation is facilitated.

Description

Technical Field

[0001] This application relates to the field of electricity metering boxes, and more particularly to an electricity metering box. Background Technology

[0002] Electricity metering boxes are terminal devices in power systems used to install electricity meters and realize electricity consumption measurement and user power distribution control. They are widely used in residential buildings, commercial buildings, rural power grids, and industrial parks. With the advancement of smart grid construction, electricity metering boxes not only perform the basic function of electricity metering but also need to integrate intelligent functions such as remote meter reading, load control, and anti-theft monitoring. In practical applications, multi-user centralized metering boxes are gradually becoming the mainstream for easier centralized management and maintenance. They are usually installed in corridors, electrical shafts, or outdoor walls, and their operational stability directly affects the reliability of power supply and the accuracy of metering.

[0003] Currently, common centralized electricity metering boxes typically employ a box body, doors, and internal functional zoning structure. Taking a nine-meter single-phase metering box as an example, its box body is a flat rectangular prism with two independent doors on the same side, corresponding to the metering compartment and the switch compartment respectively. The metering compartment houses multiple electricity meters for individually measuring the electricity consumption of each user; the switch compartment contains the incoming line switch and multiple rows of outgoing circuit breakers, providing overall power protection and branch circuit control for each user. The metering compartment and the switch compartment are physically separated by a partition, and the operating handle of the incoming line switch is exposed through an opening in the box door, facilitating opening and closing operations without opening the door. This structural design, to a certain extent, achieves clear functional zoning and convenient management and maintenance.

[0004] However, the aforementioned electricity metering boxes exhibit significant heat dissipation problems during actual use. Multiple electricity meters are centrally installed within the metering room, and the meters themselves, along with their internal communication modules, generate substantial heat during operation. Circuit breakers, busbars, and other components in the switch room also contribute to the heat. Because the box is typically enclosed or has only a few ventilation holes to ensure adequate protection, internal heat is difficult to dissipate effectively, especially during hot summer months or peak electricity consumption periods, when the internal temperature rises significantly. High temperatures not only accelerate the aging of internal components and reduce the reliability of circuit breaker operation but also directly affect the metering accuracy of the electricity meters and the stability of the communication modules. This can lead to increased metering errors, remote meter reading failures, and even equipment malfunctions, adversely impacting the power supply department's operations and management as well as users' normal electricity consumption. Summary of the Invention

[0005] To facilitate heat dissipation, this application provides an energy metering box.

[0006] The electricity metering box provided in this application adopts the following technical solution: An electricity metering box includes a box body, an electricity meter, a circuit breaker, and a cover. One side of the box body is a fixed surface. The box body has a metering chamber and a switching chamber. The electricity meter is fixedly connected to the inner wall of the metering chamber, and the circuit breaker is fixedly connected to the inner wall of the switching chamber. The cover is fixedly connected to the fixed surface. The cover and the fixed surface together form a heat dissipation channel. The cover is used to fix to the wall. The fixed surface has multiple heat dissipation vents. The metering chamber is connected to the heat dissipation channel through the heat dissipation vents, and the switching chamber is connected to the heat dissipation channel through the heat dissipation vents.

[0007] By adopting the above technical solution, a cover is installed on the fixed surface of the enclosure, forming an independent heat dissipation channel. Multiple heat dissipation vents are opened on the fixed surface, connecting the metering chamber, switch chamber, and heat dissipation channel, thus constructing an internally and externally isolated, orderly circulating heat dissipation path. Utilizing the fixed installation relationship between the cover and the wall, the heat dissipation channel is concealed at the back of the enclosure. This avoids the need for large-area heat dissipation holes on the front or sides of the enclosure, which would affect protective performance and aesthetics. Furthermore, the heat generated by the internal heating elements is effectively dissipated along the wall through the heat dissipation vents. While ensuring good dust and water resistance for the metering chamber and switch chamber, the efficiency of internal heat dissipation is significantly improved, reducing the operating temperature of the electricity meter and circuit breaker, thereby ensuring metering accuracy and electrical lifespan. This solution offers the technical advantages of a compact structure, reliable heat dissipation, and excellent protective performance.

[0008] Preferably, it also includes a fan, which is fixedly connected to the inner wall of the heat dissipation channel.

[0009] By adopting the above technical solution, when the fan is running, it drives the external ambient air to flow directionally along the heat dissipation channel, forming a continuous and stable airflow circulation. This allows the heat introduced into the heat dissipation channel from the metering chamber and switch chamber through the heat dissipation vents to be quickly removed, significantly improving the efficiency and rate of heat removal. Compared to passive heat dissipation methods that rely solely on natural convection, this method can effectively control the internal temperature of the enclosure under harsh operating conditions such as high-temperature environments, peak electricity consumption, or concentrated placement of multiple meters, preventing heat accumulation that could lead to increased metering errors in the electricity meter or malfunctions in the circuit breaker's thermal protection.

[0010] Preferably, it also includes an upper dustproof net and a lower dustproof net, the heat dissipation channel runs vertically through the channel, the upper dustproof net is located above the fan, the lower dustproof net is located below the fan, and both the upper and lower dustproof nets are fixedly connected to the inner wall of the heat dissipation channel.

[0011] By adopting the above technical solution, the heat dissipation channel runs vertically through the room, forming an airflow path from bottom to top. The lower dustproof net initially filters the external air entering the heat dissipation channel, intercepting impurities such as dust, willow catkins, and insects. The upper dustproof net further blocks foreign objects that may fall from the top of the channel, while also preventing dust from settling back into the electrical cavity when the fan stops. The two layers of dustproof nets are located on the air inlet and outlet sides of the fan, respectively, ensuring unobstructed airflow during fan operation and effectively preventing impurities from adhering to the fan blades or entering the metering and switching chambers through the heat dissipation vents. Compared to an unprotected open heat dissipation structure, this invention significantly improves the long-term operational reliability of the metering box in outdoor or dusty environments while maintaining the efficient heat dissipation capability of forced convection. It reduces the risk of heat dissipation performance degradation and electrical failures caused by dust accumulation on internal components, achieving synergistic optimization of heat dissipation efficiency, protection level, and long-term stability. It has the technical advantages of reasonable structure, reliable dust prevention, and convenient maintenance.

[0012] Preferably, the fixed surface is provided with an air inlet and an air outlet, the air inlet is located below the electricity meter, the air outlet is located above the electricity meter, the air inlet is connected to the metering chamber and the heat dissipation channel, and the air outlet is connected to the metering chamber and the heat dissipation channel.

[0013] By adopting the above technical solution, the heat generated by the electricity meters in the metering room during operation raises the temperature and lowers the density of the surrounding air, naturally forming an upward airflow. The vertical arrangement of the air inlet and outlet perfectly conforms to this physical characteristic, allowing cool air to enter the metering room from the air inlet below the electricity meter, absorb heat, and rise naturally, finally being discharged into the heat dissipation channel from the air outlet above the electricity meter. Simultaneously, the forced convection created by the fan within the heat dissipation channel further enhances this circulation process, establishing a stable pressure difference between the air inlet and outlet, ensuring a continuous supply of cool air and rapid exhaust of hot air. Compared to structures with arbitrarily placed air inlets and outlets or without clear airflow organization, this invention fully utilizes the natural law of rising hot air, achieving the highest heat removal efficiency with minimal fan power consumption. It avoids problems such as airflow short-circuiting or localized heat accumulation, significantly improving the temperature uniformity and heat dissipation consistency around the electricity meters, and has a prominent effect on ensuring the stability of the metering accuracy of each electricity meter when multiple meters are centrally located.

[0014] Preferably, it also includes a control door, which is slidably connected to the inner wall of the air inlet, and the control door is used to control the opening and closing of the air inlet.

[0015] By adopting the above technical solution, the control door opens and closes periodically according to a preset sequence. During the opening period, external cold air enters the metering chamber through the air inlet, absorbs the heat generated by the electricity meter, and forms a hot airflow that enters the heat dissipation channel through the air outlet. During the closing period, the air inlet is blocked, and the forced convection maintained by the fan in the heat dissipation channel continuously discharges the accumulated heat to the outside environment, preventing hot air from lingering in the heat dissipation channel or flowing back from the air outlet. This intermittent air intake mechanism not only ensures the orderly discharge of heat from the metering chamber and the switch chamber, but also isolates the direct intrusion of external cold air during the closing period by the control door, reducing the impact of cold air on internal components in low-temperature environments or severe weather, and reducing the risk of condensation caused by temperature fluctuations.

[0016] Preferably, it also includes an impeller, which is disposed between the upper dustproof net and the fan. The impeller includes a rotating column and blades. The blades are fixedly connected to the outer wall of the rotating column. There are multiple blades, which are evenly spaced around the axis of the rotating column. The rotating column is rotatably connected to the inner wall of the heat dissipation channel around its own axis. The axis of rotation of the rotating column is horizontal and parallel to the fixed surface.

[0017] By adopting the above technical solution, the forced airflow generated during fan operation drives the impeller to rotate continuously around the horizontal axis. During rotation, multiple blades periodically cut and guide the airflow rising along the heat dissipation channel, transforming the laminar flow along the channel wall into a turbulent flow, thereby enhancing the heat exchange efficiency between the airflow and the inner wall and fixed surface of the heat dissipation channel. Simultaneously, the impeller's location upstream of the fan helps to even out the airflow distribution on the fan's inlet side, avoiding localized airflow dead zones caused by velocity differences between the fan's center and edges.

[0018] Preferably, it further includes a first abutting piece and a second abutting piece. The sliding direction of the control door is vertical. The first abutting piece is fixedly connected to the outer wall of the control piece facing the impeller, and the second abutting piece is fixedly connected to the outer wall of the blade. The second abutting piece is used to abut against the first abutting piece to drive the control door to move upward.

[0019] By adopting the above technical solution, when the fan drives the impeller to rotate, the second abutment plate on the blade moves in a circular motion with the rotating column. When the motion trajectory intersects with the first abutment plate, a periodic abutment engagement is formed, thereby pushing the control door upward to open the air inlet. This linkage structure realizes the fully mechanical coordinated operation of the heat dissipation system—the impeller rotates autonomously under the drive of the fan airflow, thereby causing the control door to open intermittently. There is no need to add an independent drive motor or complex control system; the periodic opening and closing adjustment of the air inlet is completed entirely by airflow power. While achieving intermittent air intake heat dissipation, it avoids the introduction of additional electrical components, reduces system energy consumption and control complexity, and eliminates the risk of electromagnetic interference. It has the technical advantages of compact structure, reliable operation, energy saving, and maintenance-free operation.

[0020] Preferably, the upper end of the control door is provided with a clearance groove, and the groove wall of the clearance groove is attached to the fixed surface and the inner wall of the metering chamber opposite to the fixed surface.

[0021] By adopting the above technical solution, when the control door slides vertically, the clearance groove forms a three-sided fit with the fixed surface and the inner wall of the metering chamber. This not only provides limits and guidance for the movement trajectory of the control door, preventing it from deviating and causing jamming or sealing failure, but also forms multiple sealing interfaces through the tight fit between the groove wall and the two side walls when the control door is closed, effectively blocking external air from directly entering the metering chamber through the air inlet.

[0022] Preferably, it also includes a temperature sensor and a controller, wherein the temperature sensor is fixedly connected to the top wall of the metering chamber, and the controller is electrically connected to the temperature sensor and the fan.

[0023] By adopting the above technical solution, the temperature sensor monitors the ambient temperature in the metering room in real time and transmits the temperature signal to the controller. The controller dynamically adjusts the operation of the fan according to the preset temperature threshold. When the detected temperature exceeds the start threshold, the controller drives the fan to run and starts forced convection cooling. When the temperature drops below the stop threshold, the controller turns off the fan and restores the silent and energy-saving state.

[0024] In summary, this application includes at least one of the following beneficial technical effects: By installing a cover on the fixed surface of the enclosure, the cover and the fixed surface together form an independent heat dissipation channel. Multiple heat dissipation vents are opened on the fixed surface connecting the metering chamber, the switch chamber, and the heat dissipation channel, creating an internally and externally isolated, orderly circulating heat dissipation path. Utilizing the fixed installation relationship between the cover and the wall, the heat dissipation channel is concealed at the back of the enclosure. This avoids the need for large-area heat dissipation holes on the front or sides of the enclosure, which would affect protective performance and aesthetics. Furthermore, the heat generated by the internal heating elements is effectively dissipated along the wall through the heat dissipation vents. While ensuring good dustproof and waterproof capabilities for the metering chamber and switch chamber, this design significantly improves the efficiency of internal heat dissipation, reduces the operating temperature of the electricity meter and circuit breaker, thereby ensuring metering accuracy and electrical lifespan. It features a compact structure, reliable heat dissipation, and excellent protective performance. The control door opens and closes periodically according to a preset sequence. During the opening period, external cold air enters the metering chamber through the air inlet, absorbs the heat generated by the electricity meter, and forms a hot airflow that enters the heat dissipation channel through the air outlet. During the closing period, the air inlet is blocked, and the forced convection maintained by the fan in the heat dissipation channel continuously discharges the accumulated heat to the outside environment, preventing hot air from lingering in the heat dissipation channel or flowing back from the air outlet. This intermittent air intake mechanism not only ensures the orderly discharge of heat from the metering chamber and the switch chamber, but also isolates the direct intrusion of external cold air during the closing period through the control door, reducing the impact of cold air on internal components in low-temperature environments or severe weather, and reducing the risk of condensation caused by temperature fluctuations. When the fan drives the impeller to rotate, the second contact plate on the blades moves in a circular motion with the rotating column. When the trajectory intersects with the first contact plate, a periodic contact is formed, thereby pushing the control door upward to open the air inlet. This linkage structure realizes the fully mechanical coordinated operation of the heat dissipation system—the impeller rotates autonomously under the drive of the fan airflow, which in turn drives the control door to open intermittently. There is no need to add an independent drive motor or complex control system; the periodic opening and closing of the air inlet is completely regulated by airflow power. While achieving intermittent air intake heat dissipation, it avoids the introduction of additional electrical components, reduces system energy consumption and control complexity, and eliminates the risk of electromagnetic interference. It has the technical advantages of compact structure, reliable operation, energy saving, and maintenance-free operation. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the electricity metering box.

[0026] Figure 2 This is a cross-sectional view of the electricity metering box.

[0027] Figure 3 It is a schematic diagram of the overall structure of the box, electricity meter, circuit breaker and casing.

[0028] Explanation of reference numerals in the attached drawings: 1. Box body; 11. Housing; 111. Fixing surface; 1111. Heat dissipation vent; 1112. Air inlet; 1113. Air outlet; 112. Mounting surface; 1121. Metering slot; 1122. Switch slot; 12. First door; 121. Metering chamber; 13. Second door; 131. Switch chamber; 2. Energy meter; 3. Circuit breaker; 4. Cover; 41. Heat dissipation channel; 5. Fan; 6. Upper dustproof net; 7. Lower dustproof net; 8. Control door; 81. Clearance slot; 9. Impeller; 91. Rotating column; 92. Blade; 10. First abutment piece; 20. Second abutment piece; 30. Temperature sensor; 40. Controller. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0030] This application discloses an electricity metering box. (Refer to...) Figure 1 and Figure 2 The electricity metering box includes a box body 1, an electricity meter 2, a circuit breaker 3, a cover 4, a fan 5, an upper dustproof net 6, a lower dustproof net 7, a control door 8, an impeller 9, a first abutment plate 10, a second abutment plate 20, a temperature sensor 30, and a controller 40. The box body 1 includes a housing 11, a first door 12, and a second door 13. One side of the housing 11 is a fixed surface 111, and the other side of the housing 11 is a mounting surface 112.

[0031] Reference Figure 1 and Figure 3 The mounting surface 112 is provided with a metering slot 1121 and a switch slot 1122. A first door 12 is hinged to the wall of the metering slot 1121 and covers the opening of the slot. A second door 13 is hinged to the wall of the switch slot 1122 and covers the opening of the switch slot 1122. The hinge axes of the first door 12 and the second door 13 are parallel to each other and are both vertical. The first door 12 and the second door 13 are located near the two ends of the box body 11 in the width direction. The length direction of the box body 11 is vertical. The first door 12 and the box body 11 together form a metering chamber 121, and the second door 13 and the box body 11 together form a switch chamber 131. An energy meter 2 is fixedly connected to the bottom of the metering slot 1121. Multiple energy meters 2 are provided and distributed in an array. A circuit breaker 3 is fixedly connected to the bottom of the switch slot 1122.

[0032] Reference Figure 2 and Figure 3 The cover 4 is fixedly connected to the fixed surface 111. The cover 4 and the fixed surface 111 together form a heat dissipation channel 41, which runs vertically through the channel. The cover 4 is used to fix it to the wall. The fixed surface 111 is provided with multiple heat dissipation vents 1111. The metering chamber 121 is connected to the heat dissipation channel 41 through the heat dissipation vents 1111, and the switch chamber 131 is connected to the heat dissipation channel 41 through the heat dissipation vents 1111. The fan 5 is fixedly connected to the inner wall of the heat dissipation channel 41. The fan 5 is close to the lower end of the cover 4. The upper dustproof net 6 is located above the fan 5, and the lower dustproof net 7 is located below the fan 5. Both the upper dustproof net 6 and the lower dustproof net 7 are fixedly connected to the inner wall of the heat dissipation channel 41. The upper surface of the upper dustproof net 6 is flush with the upper end surface of the cover 4, and the lower surface of the lower dustproof net 7 is flush with the lower end surface of the cover 4.

[0033] An air inlet 1112 and an air outlet 1113 are provided on the fixed surface 111. The air inlet 1112 is located below the energy meter 2 and is close to the bottom wall of the metering chamber 121. The air outlet 1113 is located above the energy meter 2 and is close to the top wall of the metering chamber 121. The air inlet 1112 connects to the metering chamber 121 and the heat dissipation channel 41, and the air outlet 1113 also connects to the metering chamber 121 and the heat dissipation channel 41. A control door 8 is located inside the air inlet 1112. The upper end of the control door 8 is provided with a clearance groove 81. The two groove walls of the clearance groove 81 slide against the bottom of the fixed surface 111 and the metering groove 1121, respectively. The control door 8 is used to control the opening and closing of the air inlet 1112, and the sliding direction of the control door 8 is vertical.

[0034] Reference Figure 2 An impeller 9 is located between the upper dustproof screen 6 and the fan 5. The impeller 9 includes a rotating column 91 and blades 92. The blades 92 are fixedly connected to the outer wall of the rotating column 91. Multiple blades 92 are evenly spaced around the axis of the rotating column 91. The rotating column 91 is rotatably connected to the inner wall of the heat dissipation channel 41 around its own axis. The axis of rotation of the rotating column 91 is horizontal and parallel to the fixed surface 111. A first abutting piece 10 is fixedly connected to the outer wall of the control plate facing the impeller 9. A second abutting piece 20 is fixedly connected to the outer wall of the blades 92. Multiple second abutting pieces 20 are provided, and each second abutting piece 20 corresponds to one blade 92. The second abutting piece 20 abuts against the first abutting piece 10, thereby driving the control door 8 to move upward.

[0035] Temperature sensor 30 is fixedly connected to the top wall of metering chamber 121, and controller 40 is electrically connected to temperature sensor 30 and fan 5.

[0036] The implementation principle of an energy metering box according to an embodiment of this application is as follows: When the energy metering box is working, the energy meter 2 and the circuit breaker 3 generate heat, which raises the air temperature in the metering chamber 121 and the switch chamber 131. The temperature sensor 30 monitors the temperature at the top wall of the metering chamber 121 in real time and transmits the temperature signal to the controller 40. When the detected temperature reaches the preset start threshold, the controller 40 drives the fan 5 to run. The fan 5 forms a forced airflow from bottom to top in the heat dissipation channel 41. The external cold air enters the heat dissipation channel 41 after being filtered by the lower dust filter 7. Part of the airflow enters the metering chamber 121 and the switch chamber 131 through the air inlet 1112 at the bottom of the fixed surface 111, absorbs the heat generated by the energy meter 2 and the circuit breaker 3 to form hot air, and then is discharged back into the heat dissipation channel 41 through the air outlet 1113 at the top of the fixed surface 111. Simultaneously, fan 5 drives airflow to rotate impeller 9. The second abutment plate 20 on the blade 92 of impeller 9 periodically abuts against the first abutment plate 10 on control door 8, causing control door 8 to slide upward and open air inlet 1112, achieving intermittent air intake. When control door 8 is closed, heat continues to be exhausted by fan 5 through heat dissipation channel 41. As hot air rises within heat dissipation channel 41, it is filtered by upper dust filter 6 and then discharged from housing 1, forming a complete heat dissipation cycle. When the temperature drops below the stop threshold, controller 40 shuts off fan 5, impeller 9 stops rotating, and control door 8 falls back under gravity to close air inlet 1112, blocking external air from entering, thus achieving intelligent control for on-demand heat dissipation and energy-saving operation.

[0037] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An electricity metering box, characterized in that: The device includes a housing (1), an electricity meter (2), a circuit breaker (3), and a cover (4). One side of the housing (1) is a fixed surface (111). The housing (1) is provided with a metering chamber (121) and a switch chamber (131). The electricity meter (2) is fixedly connected to the inner wall of the metering chamber (121). The circuit breaker (3) is fixedly connected to the inner wall of the switch chamber (131). The cover (4) is fixedly connected to the fixed surface (111). The cover (4) and the fixed surface (111) together form a heat dissipation channel (41). The cover (4) is used to be fixed to the wall. The fixed surface (111) is provided with multiple heat dissipation vents (1111). The metering chamber (121) is connected to the heat dissipation channel (41) through the heat dissipation vents (1111). The switch chamber (131) is connected to the heat dissipation channel (41) through the heat dissipation vents (1111).

2. The electricity metering box according to claim 1, characterized in that: It also includes a fan (5), which is fixedly connected to the inner wall of the heat dissipation channel (41).

3. The electricity metering box according to claim 2, characterized in that: It also includes an upper dustproof net (6) and a lower dustproof net (7). The heat dissipation channel (41) runs vertically through the channel. The upper dustproof net (6) is located above the fan (5), and the lower dustproof net (7) is located below the fan (5). Both the upper dustproof net (6) and the lower dustproof net (7) are fixedly connected to the inner wall of the heat dissipation channel (41).

4. The electricity metering box according to claim 2, characterized in that: The fixed surface (111) is provided with an air inlet (1112) and an air outlet (1113). The air inlet (1112) is located below the electricity meter (2), and the air outlet (1113) is located above the electricity meter (2). The air inlet (1112) is connected to the metering chamber (121) and the heat dissipation channel (41), and the air outlet (1113) is connected to the metering chamber (121) and the heat dissipation channel (41).

5. The electricity metering box according to claim 4, characterized in that: It also includes a control door (8), which is slidably connected to the inner wall of the air inlet (1112) and is used to control the opening and closing of the air inlet (1112).

6. The electricity metering box according to claim 5, characterized in that: It also includes an impeller (9), which is located between the upper dustproof net (6) and the fan (5). The impeller (9) includes a rotating column (91) and blades (92). The blades (92) are fixedly connected to the outer wall of the rotating column (91). There are multiple blades (92), and the multiple blades (92) are evenly spaced around the axis of the rotating column (91). The rotating column (91) is rotatably connected to the inner wall of the heat dissipation channel (41) around its own axis. The rotation axis of the rotating column (91) is horizontal and parallel to the fixed surface (111).

7. The electricity metering box according to claim 6, characterized in that: It also includes a first abutting piece (10) and a second abutting piece (20). The sliding direction of the control door (8) is vertical. The first abutting piece (10) is fixedly connected to the outer wall of the control piece facing the impeller (9). The second abutting piece (20) is fixedly connected to the outer wall of the blade (92). The second abutting piece (20) is used to abut against the first abutting piece (10) to drive the control door (8) to move upward.

8. The electricity metering box according to claim 5, characterized in that: The upper end of the control door (8) is provided with a clearance groove (81), the groove wall of the clearance groove (81) is attached to the fixed surface (111) and the inner wall of the metering chamber (121) is away from the fixed surface (111).

9. The electricity metering box according to claim 2, characterized in that: It also includes a temperature sensor (30) and a controller (40), the temperature sensor (30) being fixedly connected to the top wall of the metering chamber (121), and the controller (40) being electrically connected to the temperature sensor (30) and the fan (5).

Images