Energy-saving electric energy metering box

Abstract

The application discloses an energy-saving electric energy metering box. The energy-saving electric energy metering box comprises a machine case provided with a plurality of electric energy meters, a heat conduction part arranged in the machine case and used for conducting heat generated by electric equipment, and a heat dissipation part used for conducting heat in the heat conduction part to the outside of the machine case; the machine case comprises a box body, the front and back sides of the box body are open, box doors are hingedly arranged at the openings respectively, air inlets and air outlets are arranged on the left and right sides of the box body and used for allowing external air to enter and for discharging air in the equipment respectively. The energy-saving electric energy metering box provided by the application adopts an active heat dissipation and passive heat dissipation mode to process heat in the box body through a heat dissipation channel formed by two partitions, orderly dissipates heat, and reduces the temperature in the box body, so that the electric energy consumption required by the electric energy meter operation is reduced.

Description

Technical Field

[0001] This invention relates to the field of power equipment technology, and in particular to an energy-saving power metering box. Background Technology

[0002] A metering box is a collection of metering instruments and auxiliary equipment necessary for measuring electrical energy, including electricity meters, voltage and current transformers and their secondary circuits, electricity metering panels, cabinets, and boxes. Metering boxes can be installed in a suspended or floor-mounted manner. To ensure installation quality, suspended boxes must be secured with built-in expansion bolts, and the bolt dimensions must meet safety and security requirements, as well as outdoor installation conditions.

[0003] Existing technology discloses an energy-saving electricity metering box, publication number CN121123804A, relating to the field of electricity metering equipment technology. It includes a distribution box with a door hinged to its side wall. An installation plate is provided inside the distribution box, with multiple sets of mounting grooves on its surface. Two sets of electrical components are provided on the side wall of the installation plate, and slots are provided at the four corners of each electrical component. The device also includes a quick-release mechanism, comprising a fixed cylinder fixedly connected to the electrical components within the slots. Multiple sets of inclined grooves are provided on the surface of the fixed cylinder, divided into upper and lower layers. A slider is slidably connected within each set of inclined grooves, and a locking block is provided on the side wall of each set of sliders. The locking block is slidably connected to the inclined groove. This invention, through the quick-release mechanism and adjustable installation plate system, overcomes the limitations of the traditional fixed installation structure of electricity metering boxes, achieving free adjustment of the installation position of electrical components and efficient optimization of space resources.

[0004] The existing air-cooling methods mentioned above use a fan to blow air directly onto the enclosure. The high and low heat-generating areas inside the enclosure are treated by the same set of air-cooling equipment. This lacks an orderly heat dissipation channel, is relatively random, and has low heat dissipation efficiency.

[0005] Therefore, it is necessary to provide an energy-saving electricity metering box to solve the above-mentioned technical problems. Summary of the Invention

[0006] In view of the above situation and to overcome the defects of the prior art, the present invention provides an energy-saving electricity metering box that can first collect and conduct the heat generated by specific electrical components in the metering box to a specific heat dissipation channel, and then use a combination of passive and active heat dissipation to unify the heat located in the heat dissipation channel.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0008] An energy-saving electricity metering box includes: a chassis with multiple electricity meters installed, wherein the chassis has a heat-conducting part for conducting heat generated by electrical equipment, and a heat dissipation part for conducting heat in the heat-conducting part to the outside of the chassis;

[0009] The chassis includes a housing with openings on the front and rear sides, and hinged doors installed at the openings. The left and right sides of the housing are provided with air inlets for external air to enter and air outlets for exhausting internal air.

[0010] The heat-conducting part includes a junction box, which is made of a metal material with good thermal conductivity and has a rod-shaped structure. The inside of the junction box is hollow to place the wires and conduct the heat generated by the wires to the heat sink fixedly installed on one side. Multiple junction boxes are fixedly connected to form a frame structure supporting the box. A partition is fixedly installed on the other side of the junction box. The heat sink passes through the partition and extends further outward. The partition is fixedly connected to the heat sink.

[0011] The heat dissipation unit includes a condenser tube, on which a circulation pump is installed to drive the flow of condensate inside the condenser tube;

[0012] The condenser tube is fixedly installed on the heat sink. Two sets of frame structures composed of junction boxes are symmetrically installed inside the box. Partitions are fixedly installed on the frame structures respectively. The cavity formed between the two partitions is a heat dissipation channel. Air entering the device from the air inlet passes through the heat dissipation channel and is discharged from the air outlet. The heat sink extends into the heat dissipation channel.

[0013] Preferably, the upper end of the box is a top plate, and an installation groove is provided on the top plate. Multiple second fans are fixedly installed at equal intervals in the installation groove, and the second fans push external air into the box.

[0014] Preferably, the lower end of the box is a base plate, and multiple pads are fixedly installed on the base plate. One side of each pad is fixedly connected to one end of a crossbeam. The lower end of the frame structure is fixedly connected to the pads and supported by the pads. A gap for air passage is formed between the lower end of the frame structure and the partition and the base plate. The second fan pushes the air from outside into the box to be discharged through the gap and discharges the heat inside the box with the air.

[0015] Preferably, the condenser tubes are distributed in an S-shape on the heat sink. The condenser tubes are closed pipes. The partition inside the box is divided into two areas, left and right. One area is used to install safety electrical components such as the main switch to control the on / off of the circuit. The other area is used to install the electricity meter. The main area where heat is generated is the area where the electricity meter is installed. The condenser tubes are mainly concentrated on one side corresponding to the electricity meter installation area. The condenser tube part is located on the side of the main switch and directly below the second fan.

[0016] Preferably, the cold air blown into the housing by the second fan moves to the side of the partition where the main switch is installed, and transfers heat to the condenser tube installed on the partition, thereby reducing the temperature of the condensate in the condenser tube.

[0017] Preferably, the front and rear openings of the enclosure are hinged with double doors, and the two doors on the same side form a funnel-shaped structure to guide external airflow into the enclosure from the air inlet.

[0018] Preferably, a heat-conducting strip perpendicular to its surface is fixedly installed at the lower end of the junction box. The heat-conducting strip is made of heat-conducting metal material. The electricity meter is fixedly installed on the mounting box. The mounting box is fixedly connected to the partition. The heat-conducting strip is in contact with the mounting box. The heat generated by the electricity meter can be transferred to the heat-conducting strip, the junction box and the partition through the mounting box.

[0019] Preferably, the mounting box is a box-shaped structure, and the mounting box has a through-ventilation duct for airflow inside. Multiple heat-conducting plates arranged at equal intervals are fixedly installed at the upper end of the air duct of the mounting box, and a first fan is fixedly installed at the lower end of the air duct. The first fan pushes the airflow to enter from the lower end of the air duct and exit from the upper end of the air duct after passing through the heat-conducting plates.

[0020] Preferably, a plurality of columns are installed on the upper part of the top plate at the upper end of the housing, the lower end of the columns is fixedly connected to the top plate, and a heat insulation plate is fixedly installed on the upper end of the columns. The heat insulation plate is a photovoltaic panel, which can convert light energy into chemical energy stored in the battery and used by the circulation pump.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) The present invention uses a combination of active and passive heat dissipation to process the heat inside the box through the heat dissipation channel formed by two partitions, and dissipates heat in an orderly manner to reduce the temperature inside the box, thereby reducing the energy consumption required for the operation of the electricity meter.

[0023] (2) The junction box of the present invention is used to store wires and keep the conductors inside the box neat, and to conduct the heat generated by the wires to a heat dissipation part on one side of the partition for treatment.

[0024] (3) The condenser and circulating pump of the present invention absorb heat from the heat sink and accelerate heat dissipation by water cooling. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the energy-saving electricity metering box provided by the present invention;

[0026] Figure 2 The front view of the energy-saving electricity metering box provided by the present invention;

[0027] Figure 3 This is a schematic diagram of the internal structure of the energy-saving electricity metering box provided by the present invention;

[0028] Figure 4 A cross-sectional view of the energy-saving electricity metering box provided by the present invention;

[0029] Figure 5 for Figure 2 Cross-sectional view at point BB;

[0030] Figure 6 for Figure 2 Cross-sectional view at point AA;

[0031] Figure 7 A first-view installation diagram of the energy-saving electricity meter box provided by the present invention;

[0032] Figure 8 This is a second-view installation diagram of the energy-saving electricity meter box provided by the present invention.

[0033] The corresponding names of the reference numerals in the attached drawings are as follows: 10, chassis; 11, enclosure; 12, base plate; 121, pad; 122, crossbeam; 13, side plate; 131, air inlet; 132, air outlet; 133, air guide plate; 14, top plate; 141, mounting slot; 15, door; 20, heat conduction section; 21, wiring trim; 22, junction box; 221, heat sink; 222, cable hole; 23, partition; 24, heat conduction strip; 25, mounting box; 251, heat conduction plate; 252, first fan; 30, heat dissipation section; 31, condenser pipe; 32, circulation pump; 33, second fan; 34, heat insulation plate; 341, column. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments of the present invention include, but are not limited to, the following embodiments.

[0035] Example 1:

[0036] like Figure 1 As shown, the energy-saving electricity metering box provided by the present invention comprises three parts: a chassis 10, a heat-conducting part 20, and a heat-dissipating part 30. The chassis 10 is the external support and maintenance structure of the entire device, and multiple electricity meters for measuring electricity consumption are installed inside it. The heat-conducting part 20 is installed inside the chassis 10 and is used to collect and conduct the heat generated by the electrical equipment during operation to the heat dissipating part 30. The heat dissipating part 30 transfers the heat collected by the heat-conducting part 20 to the outside of the chassis 10 through both active and passive heat dissipation.

[0037] Specifically, such as Figure 1-2 , Figure 4-5 As shown, the chassis 10 includes a cubic box 11 with openings on the front and rear sides and closed on the other side. It can be made of metal sheet. Box doors 15 are hinged to the front and rear openings and can be rotated to open or close relative to the box 11 to facilitate the installation and reading of the electricity meter, main switch, etc. inside the box 11 by the operator. Transparent plastic protective covers are installed at the front and rear openings of the box 11. The purpose of the protective covers is to prevent external debris such as dust and animals from entering the box 11 and causing short circuits. They also have a certain waterproof effect. The protective covers are existing technology and are normally closed after installation, so that the electricity meter inside the box 11 is in a closed structure. For the sake of clear display of the internal structure, the protective covers are not shown in the attached drawings.

[0038] The front and rear openings of the enclosure 11 both adopt a double-door opening method, that is, two opposing doors 15 are installed at each opening. Therefore, when the two doors 15 on the same side are opened, they open outward to form a funnel-shaped structure. To maintain the opening angle of the doors 15, damping hinges can be used to hinge the doors 15 to the enclosure 11. The funnel-shaped structure can guide more external airflow from the air inlets 131 on the side panels 13 on the left and right sides of the enclosure 11 into the interior of the enclosure 11, thereby improving the passive heat dissipation efficiency of the device.

[0039] Specifically, the left and right sides of the enclosure 11 are side panels 13, with air inlets 131 and air outlets 132 respectively. Both air inlets 131 and air outlets 132 are elongated, grille-like openings. Air inlets 131 allow cooler external airflow to enter the enclosure 11. With the aid of the flared door 15 structure, a larger area of ​​external air can enter the enclosure 11 through the air inlet 131. The air outlet 132 is located on the other side panel 13, allowing hot air absorbed inside the enclosure 11 to be exhausted to the external environment through the air outlet 132, thus ensuring ventilation while preventing... If external debris or insects enter the box 11, in order to further improve the efficiency of air intake and exhaust, guide vanes 133 can be installed at the air inlet 131 and the air outlet 132. The guide vanes 133 are thin sheet structures with an inclined arrangement, fixedly installed on the side plate 13 and covering the air inlet 131 or the air outlet 132. The guide vanes 133 are arranged in the horizontal direction to guide the airflow to flow horizontally in the box 11. At the same time, the guide vanes 133 divide the space of the air inlet 131 and the air outlet 132, similar to a net blocking the air outlet 131 and the air inlet 132 to prevent debris from entering the box 11.

[0040] Please see Figure 1-2 , Figure 6As shown, the upper end of the housing 11 is provided with a top plate 14. The top plate 14 is a horizontally arranged inverted V-shaped plate structure, blocking the top of the housing 11. A mounting groove 141 is formed on the top plate 14, which is a through groove extending through the thickness of the top plate 14. Multiple second fans 33 are equidistantly fixedly installed in the mounting groove 141. The second fans 33 are axial flow fans, and their axis is perpendicular to the plane of the top plate 14. When the second fans 33 operate, they can push cooler external air from the mounting groove 141 into the housing 11. The lower end of 11 is a base plate 12, which is a horizontally arranged flat plate structure. Multiple pads 121 are fixedly installed on the upper surface of the base plate 12. The pads 121 are block-shaped structures made of insulating material with a certain height and strength. The pads 121 are arranged at intervals along the length of the base plate 12. One side of each pad 121 is fixedly connected to one end of a crossbeam 122. The crossbeam 122 is a long strip structure that extends horizontally along the width of the base plate 12, connecting multiple pads 121 in the same row into one piece to enhance the support stability.

[0041] like Figure 1-8 As shown, the heat-conducting part 20 is used to concentrate the heat generated by the electricity meter and internal wires to the heat dissipation channel, the structure of which will be described in detail below.

[0042] The junction box 22 is made of aluminum alloy and has a long, rod-like structure with a hollow internal cavity extending along its length. This cavity accommodates and houses the wires connecting various energy meters and the main switch, ensuring the wires are neatly arranged inside the housing 11. Simultaneously, the heat generated by the wires during operation can be directly or indirectly transferred to the outer wall of the junction box 22 through the surrounding air. The junction box 22 has a rectangular cross-section and a relatively thick wall, providing sufficient structural strength. Figure 2 As shown, multiple junction boxes 22 are fixedly connected to each other to form a frame that supports the internal structure of the box 11. Specifically, two sets of frame structures composed of junction boxes 22 are symmetrically installed inside the box 11. The two sets of frames are located on the left and right sides inside the box 11, respectively. Each set of frames includes multiple vertically arranged junction boxes 22 and horizontal connecting rods that are horizontally connected between adjacent junction boxes 22, together forming a stable cage-like frame.

[0043] Two sets of frame structures are respectively fixedly installed with vertical partitions 23. The two partitions 23 are parallel to each other. The upper end of the partitions 23 is sealed by the top plate 14, thus forming a cavity that runs through the front and back, i.e., a heat dissipation channel. Multiple sets of heat sinks 221 are fixedly installed on the outer wall of the junction box 22 near the partitions 23. The heat sinks 221 are thin sheet structures made of metal materials with good thermal conductivity. Their plate surfaces are perpendicular to the long axis of the junction box 22, forming a fin-like structure. A part of the heat sink 221 passes through the pre-set through slots on the partitions 23 and extends further outward into the heat dissipation channel inside the partitions 23, thereby directly transferring the heat collected by the junction box 22 to the heat dissipation channel.

[0044] The heat sink 221 and the partition 23 can also be welded and fixed together, so that the partition 23 can also participate in the heat conduction as a heat conduction medium. The junction box 22 is also provided with a through hole 222 that penetrates the wall of the junction box 22, so that the wires can pass through the inside of the junction box 22 to connect to the electricity meter or other electrical components. In addition, a long strip of straightening strip 21 is provided between the electricity meter and the junction box 22. The cross-section of the straightening strip 21 is L-shaped. The vertical part is fixedly installed on the partition 23, while the horizontal part is also provided with multiple through holes 222. The wires connected from the electricity meter are relatively messy and disordered. The position of the wires can be constrained by the through holes 222 on the straightening strip 21, so as to keep the wires neat and orderly and facilitate further insertion into the junction box 22.

[0045] by Figure 2 As shown, the left side of partition 23 is used to install safety electrical components such as the main switch to control the on / off state of the circuit, and the right side of partition 23 is used to install the electricity meter. Since the electricity meter generates a lot of heat during operation, while the main switch and other components generate relatively little heat, the main working area of ​​the heat dissipation part 30 is installed on the side of the electricity meter installation area.

[0046] On the other hand, a heat-conducting strip 24 is fixedly installed at the lower end of the junction box 22, which is perpendicular to its surface and distributed in a vertical direction. The heat-conducting strip 24 is made of aluminum alloy and has a long strip-shaped thin sheet structure. One end of the heat-conducting strip 24 is fixedly connected to the junction box 22, and the other end extends towards the electricity meter installation area. One side of the heat-conducting strip 24 contacts the mounting box 25.

[0047] like Figure 7-8 As shown, the mounting box 25 is made of a metal material with good thermal conductivity. It is a box-shaped structure with a hollow interior and a through-hole at the top and bottom. The electricity meter can be fixedly installed on the side of the mounting box 25 by bolts, etc. The heat generated during the operation of the electricity meter is transferred sequentially through the mounting box 25 and the heat-conducting strip 24 to the junction box 22 and the partition 23, and then transferred to the heat dissipation channel through the heat sink 221.

[0048] The internal cavity of the mounting box 25 is a through-flow air duct. Multiple heat-conducting plates 251 arranged at equal intervals are fixedly installed at the upper end of the air duct of the mounting box 25. The heat-conducting plates 251 are thin sheet structures made of heat-conducting metal materials. Their surfaces are aligned with the airflow direction to increase the contact area with the air. Multiple first fans 252 are fixedly installed at the lower end of the air duct of the mounting box 25. The first fans 252 are miniature axial flow fans. When the first fans 252 are running, they push the airflow into the lower end of the air duct. The airflow flows upward and passes over the surface of the heat-conducting plates 251, and finally exits from the upper end of the air duct. During this process, some of the heat transferred from the power meter to the mounting box 25 is carried away by the airflow through heat exchange with the flowing air via the heat-conducting plates 251.

[0049] like Figure 3-4 As shown, the heat dissipation part 30 includes a condenser tube 31, which is a closed pipe structure made of copper tube and filled with condensate. The condenser tube 31 passes through and is fixedly installed on the heat sink 221 and keeps in close contact to ensure that the heat on the heat sink 221 can be effectively transferred to the condensate in the condenser tube 31.

[0050] The condenser tube 31 bends repeatedly in the vertical plane, forming a reciprocating tortuous path, and is distributed in an S-shape on the heat sink 221. This increases the contact area between the condenser tube 31 and the heat sink 221 within a limited space, thereby improving the heat exchange efficiency. A circulation pump 32 is installed on the condenser tube 31. The circulation pump 32 is connected in series in the pipe circuit of the condenser tube 31 to drive the condensate in the condenser tube 31 to circulate along the pipe direction, so as to accelerate the transfer and diffusion of heat.

[0051] Please note that you should refer to [link / reference]. Figure 4 As shown, the back area to the right of the dotted line of partition 23 is used to install control electrical components such as the main switch, while the back area to the left of the dotted line of partition 23 is used to install the electricity meter. The condenser pipe 31 is mainly concentrated on the left side corresponding to the electricity meter installation area. That is, most of the S-shaped bend of the condenser pipe 31 is located on the heat sink 221 on the partition 23 in the electricity meter installation area, while the right half of the condenser pipe 31 is located on the partition 23 on the side where the main switch is installed, and is also located directly below the second fan 33. When the second fan 33 is mounted from the mounting groove 141 of the top plate 14... When external cold air is blown into the housing 11, the cold air first blows onto the condenser pipe 31 section on the partition 23 on the side of the main switch, and performs preliminary cooling of the condensate in this part of the condenser pipe 31 to reduce the temperature of the condensate. To improve the cooling effect, this part of the condenser pipe 31 can also be set in a plate shape, so that the contact area between the pipe wall and the cold air is large enough. The cooled condensate flows under the drive of the circulating pump 32 to the condenser pipe 31 section on the side of the electricity meter installation area, where it absorbs the heat from the heat sink 221 in that area, thereby carrying away the heat generated by the electricity meter.

[0052] like Figure 4-5 As shown, the lower end of the junction box 22 constituting the frame structure is fixedly installed on the upper surface of the pad 121. Since the pad 121 has a certain height, a gap of a certain height is formed between the lower end of the entire frame structure and the partition 23 and the upper surface of the base plate 12. This gap is used to allow air to pass through. After the second fan 33 pushes the external air into the box 11, the air can flow inside the box 11 and finally pass through the gap and be discharged from the outlet 132. The setting of this gap provides an additional flow path for the air, so that the heat at the bottom of the box 11 can also be carried away and discharged by the flowing air.

[0053] like Figure 1 and Figure 6 As shown, four columns 341 are installed on the top plate 14 at the upper end of the box 11. The columns 341 are vertical columnar structures, with their lower ends fixedly connected to the upper surface of the top plate 14 and their upper ends fixedly connected to the heat insulation plate 34. The heat insulation plate 34 and the top plate 14 are separated by a certain distance through the columns 341 to form an air heat insulation layer, which can reduce the direct transfer of external sunlight heat to the inside of the box 11. In addition, the heat insulation plate 34 can also be made of photovoltaic panels, which can convert light energy into electrical energy. This electrical energy can be stored in a battery that is electrically connected to the photovoltaic panel. The battery is fixedly installed inside the box 11 and is used to power the circulating pump 32 and the first fan 252, the second fan 33 and other electrical components, thereby further reducing the metering box's consumption of external power grid electricity.

[0054] During use, the heat generated by the electricity meter is transferred to the junction box 22 and partition 23 through the mounting box 25 and heat-conducting strip 24. The heat generated by the wires is transferred to the junction box 22. Part of the heat on the junction box 22 and partition 23 is transferred to the air in the heat dissipation channel through the heat sink 221, and the other part is transferred to the condensate in the condenser tube 31 through the heat sink 221. The condensate circulates under the drive of the circulating pump 32, and the heat is transported from the electricity meter installation area to the main switch area through the coolant. The heat is carried away by the cold air blown in by the second fan 33. The first fan 252 pushes the air to flow through the air duct in the mounting box 25 to directly cool the electricity meter.

[0055] The second fan 33 blows in external cold air from the top of the housing 11. The external cold air flows through the heat dissipation channel, exchanges heat with the heat sink 221 and the condenser pipe 31, and is then discharged from the air outlet 132 and the gap at the bottom of the housing 11, carrying the heat out of the housing 11.

[0056] Working principle: A heat dissipation channel is formed between two partitions 23 fixedly installed inside the housing 11. The heat dissipation channel is the place where heat is concentrated. First, there is passive heat dissipation. The air entering the housing 11 from the air inlet 131 flows through the heat dissipation channel and is discharged from the air outlet 132. In this process, the hot air in the heat dissipation channel is carried away. The second is active heat dissipation. The second fan 33 installed on the top plate 14 directly draws the cold air outside the device into the heat dissipation channel, thereby carrying away the heat in the heat dissipation channel. At the same time, the cold air sent into the heat dissipation channel by the second fan 33 cools the coolant in the condenser 31, thereby maintaining the coolant in a good working condition.

[0057] The above embodiments are merely one of the preferred embodiments of the present invention and should not be used to limit the scope of protection of the present invention. Any modifications or refinements made to the main design concept and spirit of the present invention that are not of substantial significance, but solve the same technical problem as the present invention, should be included within the scope of protection of the present invention.

Claims

1. An energy-saving electricity metering box, characterized in that, include: A chassis (10) with multiple energy meters installed inside the chassis (10) has a heat-conducting part (20) for conducting heat generated by the electrical equipment, and a heat dissipation part (30) for conducting heat in the heat-conducting part (20) to the outside of the chassis (10). The chassis (10) includes a box body (11), which has openings on the front and rear sides, and a door (15) is hinged to the opening. The left and right sides of the box body (11) are provided with an air inlet (131) for external air to enter and an air outlet (132) for exhausting the internal air of the equipment. The heat-conducting part (20) includes a junction box (22), which is made of a metal material with good thermal conductivity and has a rod-shaped structure. The junction box (22) is hollow inside and is used to place wires and conduct the heat generated by the wires to the heat sink (221) fixedly installed on one side. Multiple junction boxes (22) are fixedly connected to form a frame structure supporting the box (11). A partition (23) is fixedly installed on the other side of the junction box (22). The heat sink (221) passes through the partition (23) and extends further outward. The partition (23) is fixedly connected to the heat sink (221). The heat dissipation section (30) includes a condenser tube (31) and a circulation pump (32) is installed on the condenser tube (31) to drive the flow of condensate inside the condenser tube (31). The condenser tube (31) is fixedly installed on the heat sink (221). Two sets of frame structures composed of junction boxes (22) are symmetrically installed inside the housing (11). The frame structures are fixedly installed with partitions (23). The cavity formed between the two partitions (23) is a heat dissipation channel. The air entering the device from the air inlet (131) passes through the heat dissipation channel and is discharged from the air outlet (132). The heat sink (221) extends into the heat dissipation channel.

2. The energy-saving electricity metering box according to claim 1, characterized in that, The upper end of the box (11) is a top plate (14), and an installation groove (141) is provided on the top plate (14). Multiple second fans (33) are fixedly installed at equal intervals in the installation groove (141), and the second fans (33) push external air into the box (11).

3. The energy-saving electricity metering box according to claim 2, characterized in that, The lower end of the box (11) is a base plate (12), and multiple pads (121) are fixedly installed on the base plate (12). One side of the pad (121) is fixedly connected to one end of the crossbeam (122). The lower end of the frame structure is fixedly connected to the pad (121) and supported by the pad (121). A gap for air passage is formed between the lower end of the frame structure and the partition 23 and the base plate (12). The second fan (33) pushes the air entering the box (11) from the outside into the exhaust device through the gap and exhausts the heat inside the box (11) with the air.

4. The energy-saving electricity metering box according to claim 1, characterized in that, The condenser tubes (31) are distributed in an S-shape on the heat sink (221). The condenser tubes (31) are closed pipes. The partition (23) inside the box (11) is divided into two areas, left and right. One area is used to install safety electrical components such as the main switch to control the on and off of the circuit. The other area is used to install the electricity meter. The main area where heat is generated is the area where the electricity meter is installed. The condenser tubes (31) are mainly concentrated on one side corresponding to the electricity meter installation area. The part of the condenser tubes (31) is located on the side of the main switch and is located directly below the second fan (33).

5. The energy-saving electricity metering box according to claim 4, characterized in that, The second fan (33) blows cold air into the housing (11) and moves to the side of the partition (23) where the main switch is installed, and transfers heat to the condenser (31) installed on the partition (23) to reduce the temperature of the condensate in the condenser (31).

6. The energy-saving electricity metering box according to claim 1, characterized in that, The box (11) has double doors hinged at the front and rear openings respectively. The two doors (15) on the same side on the left and right sides form a flared structure to guide the external airflow into the box (11) from the air inlet (131).

7. The energy-saving electricity metering box according to claim 1, characterized in that, A heat-conducting strip (24) perpendicular to its surface is fixedly installed at the lower end of the junction box (22). The heat-conducting strip (24) is made of heat-conducting metal material. The electricity meter is fixedly installed on the mounting box (25). The mounting box (25) is fixedly connected to the partition (23). The heat-conducting strip (24) is in contact with the mounting box (25). The heat generated by the electricity meter can be transferred through the mounting box (25) to the heat-conducting strip (24), the junction box (22), and the partition (23).

8. The energy-saving electricity metering box according to claim 7, characterized in that, The mounting box (25) is a box-shaped structure. The mounting box (25) has a through-flow duct for air flow inside. Multiple heat-conducting plates (251) arranged at equal intervals are fixedly installed at the upper end of the air duct of the mounting box (25). A first fan (252) is fixedly installed at the lower end of the air duct. The first fan (252) pushes the airflow from the lower end of the air duct into the air duct and through the heat-conducting plates (251) to be discharged from the upper end of the air duct.

9. The energy-saving electricity metering box according to claim 1, characterized in that, Multiple columns (341) are installed on the top plate (14) at the upper end of the box (11). The lower end of the column (341) is fixedly connected to the top plate (14). A heat insulation plate (34) is fixedly installed on the upper end of the column (341). The heat insulation plate (34) is a photovoltaic panel, which can convert light energy into chemical energy stored in the battery and used by the circulation pump (32).

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