Photovoltaic intelligent grid-connected metering box

Abstract

A photovoltaic intelligent grid-connected metering box, comprising a box body and a box door, a plurality of equidistantly arranged U-shaped grooves are formed in the box body along the vertical direction thereof, an exhaust groove connected with the U-shaped grooves is formed in one side of the box body, the exhaust groove is communicated with the outside of the box body, a fan is fixedly arranged on one side of the box body, the fan is communicated with the exhaust groove, a plurality of through holes communicated with the inside of the box body are formed in the U-shaped groove along the path thereof, a blocking plate is slidably arranged in the through hole, a plurality of cavities for storing inert gas are equidistantly arranged in the sidewall of the box body except the side where the box door is located, a push plate is slidably arranged in the cavity, and the push plate is connected with the blocking plate; when the inert gas in the cavity is heated and expanded, the push plate is pushed to move, the blocking plate is slidably driven by the push plate to open the through hole. The actual temperature distribution state in the box can be used to realize pinpoint accurate heat dissipation of the heating area, so that the heat dissipation airflow is accurately acted on the heating components.

Description

Technical Field

[0001] This invention relates to the field of metering box technology, and specifically to a photovoltaic intelligent grid-connected metering box. Background Technology

[0002] As a core supporting device connecting photovoltaic inverters to the grid connection point, the photovoltaic metering box mainly undertakes important functions such as power generation metering, grid connection safety protection, and system operation status monitoring. Currently, mainstream photovoltaic metering boxes integrate bidirectional energy meters, distribution circuit breakers, surge protectors, anti-islanding protection devices, and other electrical components. The box body is mostly made of SMC composite material or stainless steel, meeting the protection requirements for outdoor use. Existing photovoltaic metering boxes are compatible with various grid connection modes, including full grid connection and self-consumption with surplus power fed into the grid, and can complete basic power statistics and routine electrical safety protection work.

[0003] For example, patent document CN121886208A, entitled "An Electricity Metering Box with Both Protection and Heat Dissipation," includes an outer box with cooling boxes fixedly connected to both sides, the cooling boxes being filled with coolant; an inner box fixedly connected to the middle of the outer box, the inner box containing an electricity metering device; a cooling pipe with continuous bends is provided inside the cooling boxes; one end of the cooling pipe passes through the cooling boxes and the lower side wall of the outer box and extends into the interior of the outer box, the other end of the cooling pipe passes through the top of the cooling boxes and is fixedly connected to an adjusting pipe mechanism; a connecting pipe mechanism is installed on the top of the outer and inner boxes, connecting the interior of the inner box to the adjusting pipe mechanism; and multiple ventilation holes are provided at the bottom of the inner box. When the forward and reverse fans are performing the exhaust operation, one of the one-way valves is opened, and the hot air generated by the operation of the equipment inside the inner box is drawn out and enters the interior of one of the cooling pipes to be cooled by the external coolant. After cooling, it enters the bottom of the outer box and returns to the interior of the inner box through the vent, thus forming a circulating heat dissipation.

[0004] However, during the use of the aforementioned metering box, due to the compact internal space and the varying heat generation of each component, the aforementioned heat dissipation methods can only provide overall, non-directional cooling to the electrical components inside the box. They cannot provide targeted, on-demand heat dissipation to high-heat areas based on real-time temperature distribution. This makes it difficult for the heat dissipation airflow or path to accurately cover the core heat-generating components. At the same time, it cannot dynamically adjust the heat dissipation intensity of corresponding locations according to local temperature changes, resulting in local heat accumulation while the heat dissipation capacity is dispersed to non-critical areas. This leads to unnecessary energy consumption under local low-temperature conditions or insufficient heat dissipation under high-temperature conditions, resulting in low overall heat dissipation utilization efficiency. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a photovoltaic intelligent grid-connected metering box to solve the technical problem mentioned in the background art of being unable to perform targeted and on-demand heat dissipation of high-heat areas based on real-time temperature distribution.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A photovoltaic smart grid-connected metering box includes a box body and a box door. Multiple U-shaped grooves are arranged equidistantly along the vertical direction inside the box body. An exhaust trough connecting each U-shaped groove is also provided on one side of the box body, communicating with the outside of the box body. A fan is fixedly installed on one side of the box body, communicating with the exhaust trough. Multiple through holes communicating with the inside of the box body are provided along the path of each U-shaped groove. A sealing plate is slidably installed within each through hole. Multiple cavities for storing inert gas are arranged vertically at equal intervals on the side walls inside the box body, excluding the side where the box door is located. Push plates are slidably installed within each cavity, connected to the sealing plates. When the inert gas in the cavity expands due to heat, it pushes the push plate to move, causing the sealing plate to slide and open the through holes.

[0007] Furthermore, at the end of the through hole facing the inside of the housing, multiple elastic petals are fixedly arranged in a circumferential array. A driving component is provided inside the through hole, which is used to drive the ends of the multiple elastic petals to extend outward and open together to form a trumpet-shaped structure.

[0008] Furthermore, the drive assembly includes a fixed frame fixedly disposed within the through hole and a first inclined block disposed on the sealing plate. A sliding rod is slidably disposed at the center of the fixed frame along the axial direction of the through hole. A second inclined block that slides and engages with the first inclined block is fixedly disposed at one end of the sliding rod near the sealing plate. A fixed plate is fixedly disposed at the other end of the sliding rod. Multiple hinge rods are hingedly disposed on the fixed plate. The other end of each hinge rod is hingedly connected to a corresponding elastic flap. A spring is fixedly disposed between the fixed plate and the fixed frame.

[0009] Furthermore, a pleated structure is fixedly provided between the adjacent elastic petals. When multiple elastic petals together form a trumpet-shaped structure, the adjacent elastic petals can pull the pleated structure to unfold and form a fan-shaped sealing surface to seal the gap between the adjacent elastic petals, so that all elastic petals form a sealed and complete trumpet-shaped integral structure.

[0010] Furthermore, the inner wall of the through hole is provided with a groove perpendicular to the axis of the through hole, the sealing plate is slidably disposed inside the groove, and a connecting rod is fixedly disposed at the bottom end of the sealing plate, the connecting rod being fixedly connected to the corresponding push plate.

[0011] Furthermore, a heat-conducting plate is provided on the side of the cavity close to the inner cavity of the box, and the heat-conducting plate is made of a heat-conducting material.

[0012] Furthermore, the heat-conducting material is copper or aluminum alloy.

[0013] Furthermore, the inert gas filled in the cavity is any one of argon, nitrogen, helium, and neon.

[0014] Furthermore, the bottom of the housing is provided with air inlets evenly spaced, and a filter screen is fixedly installed inside the air inlets.

[0015] Furthermore, a controller is installed on the housing, and a displacement sensor is installed on the push plate. The displacement sensor is electrically connected to the controller, and the controller is electrically connected to the fan.

[0016] The beneficial effects of this invention are as follows: The enclosure incorporates U-shaped grooves, through-holes, exhaust channels, a fan, cavities filled with inert gas, a push plate, and a sealing plate. When localized heating occurs in the electrical components inside the enclosure, the inert gas in the cavity near the corresponding heating location expands due to heat, causing the push plate to move. Simultaneously, the push plate moves the sealing plate, opening the through-hole at the corresponding location. The fan then activates, allowing the hot air accumulated around the high-temperature electrical components to escape through the opened through-holes, U-shaped grooves, and exhaust channels. Meanwhile, cool outside air enters the enclosure through the air inlet at the bottom, filtered by a filter, thus improving airflow around the high-temperature electrical components. Furthermore, based on the actual temperature distribution inside the enclosure, precise heat dissipation is achieved in the heating areas, ensuring that the cooling airflow accurately targets the heating components. The enclosure can also adaptively adjust the heat dissipation status according to local temperature changes, effectively preventing localized heat accumulation inside the enclosure and avoiding the energy waste caused by the dispersion of cooling airflow to low-temperature areas and insufficient heat dissipation in high-temperature areas. This effectively improves the overall heat dissipation effect and energy utilization efficiency inside the enclosure. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present invention; Figure 2 This is a front sectional view of the present invention; Figure 3 This is a top sectional view of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of point A; Figure 5 This is a perspective view of the invention with the cabinet door hidden. Figure 6 For the present invention Figure 5 Partial sectional view; Figure 7 For the present invention Figure 6 Enlarged view of point B; Figure 8 For the present invention Figure 6 Enlarged view of point C; Figure 9This is a perspective view of the elastic flap and driving assembly of the present invention; Figure 10 For the present invention Figure 9 Enlarged view of point D.

[0018] Explanation of reference numerals in the attached drawings: 1. Box body; 2. Mounting plate; 201. Electrical component; 3. Box door; 4. U-shaped groove; 5. Exhaust groove; 6. Fan; 7. Through hole; 8. Sealing plate; 9. Slide groove; 10. Cavity; 11. Push plate; 12. Connecting rod; 13. Air inlet; 14. Heat-conducting plate; 15. Elastic flap; 16. Fixing frame; 17. First inclined block; 18. Receiving groove; 19. Sliding rod; 20. Second inclined block; 21. Fixing plate; 22. Hinge rod; 23. Spring; 24. Pleated structure. Detailed Implementation

[0019] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] like Figures 1-10 As shown, a photovoltaic intelligent grid-connected metering box includes a box body 1. An mounting plate 2 is fixedly installed inside the box body 1, and several electrical components 201 are arranged sequentially on the front side of the mounting plate 2. A box door 3 is hinged to the front side of the box body 1, allowing staff to conveniently perform inspection, maintenance, and debugging of various electrical components 201 inside the box by opening and closing the box door 3.

[0021] Multiple U-shaped grooves 4, with circular cross-sections, are equidistantly arranged along the vertical direction inside the housing 1. An exhaust duct 5, connecting the U-shaped grooves 4, is also provided on one side of the housing 1, communicating with the outside of the housing 1. A fan 6 is fixedly installed on one side of the housing 1, and the fan 6's air duct is connected to the exhaust duct 5. Multiple through holes 7, communicating with the interior of the housing 1, are provided along the path of the U-shaped grooves 4. A sealing plate 8 is slidably installed within each through hole 7. Specifically, a sliding groove 9, perpendicular to the axis of the through hole 7, is provided on the inner wall of the through hole 7, and the sealing plate 8 is slidably installed within the sliding groove 9.

[0022] Inside the enclosure 1, excluding the side where the door 3 is located, multiple vertically spaced cavities 10 for storing inert gas are arranged on the side walls. These cavities 10 are positioned below the U-shaped groove 4. A push plate 11 is slidably installed within each cavity 10, and inert gas fills the space between the bottom surface of the push plate 11 and the cavity 10. A connecting rod 12 is fixedly installed at the bottom end of a sealing plate 8, extending downwards into the corresponding cavity 10 and fixedly connected to the corresponding push plate 11. The length of the cavity 10 is adapted to the arrangement range of multiple through holes 7 in the same layer, ensuring that when the push plate 11 slides along the cavity 10, the connecting rod 12 simultaneously drives the corresponding multiple sealing plates 8 to slide synchronously, thereby simultaneously opening the multiple through holes 7 in that layer. This ensures sufficient exhaust volume during localized heating, improves localized heat dissipation efficiency, and meets the rapid heat dissipation requirements of high-heat areas.

[0023] Air inlets 13 are evenly distributed at the bottom of the housing 1. A filter screen is fixedly installed inside the air inlet 13 to filter impurities from the airflow entering the housing 1. A controller (not shown in the figure) is fixedly installed inside the housing 1. A displacement sensor is fixedly installed on the top surface of the push plate 11. The displacement sensor is electrically connected to the controller, and the controller synchronously forms an electrical connection circuit with the fan 6.

[0024] When the electrical components 201 inside the housing 1 experience localized temperature rise, the inert gas in the cavity 10 near the corresponding heated location expands due to heat, causing the push plate 11 to move. Simultaneously, the push plate 11 drives the sealing plate 8 to slide, opening the through hole 7 at the corresponding location. During the movement of the push plate 11, the displacement sensor moves synchronously, transmitting the collected displacement electrical signal to the controller. Upon receiving the signal, the controller starts the fan 6.

[0025] When the fan 6 is working, the hot air accumulated around the high-temperature electrical component 201 is discharged out of the housing 1 through the open through-hole 7, U-shaped groove 4, and exhaust groove 5. Meanwhile, cool outside air enters the housing 1 through the air inlet 13 at the bottom of the housing 1, filtered by a filter, effectively increasing the airflow rate around the high-temperature electrical component 201. This allows for precise, targeted heat dissipation of the heat-generating area based on the actual temperature distribution inside the housing, ensuring that the cooling airflow accurately targets the heat-generating components. It can also adaptively adjust the heat dissipation status of corresponding locations based on local temperature changes. This effectively avoids localized heat accumulation inside the housing 1, prevents the cooling airflow from dispersing to low-temperature areas and causing energy waste, and avoids insufficient heat dissipation in high-temperature areas, thus effectively improving the overall heat dissipation effect and energy utilization efficiency inside the housing 1.

[0026] A heat-conducting plate 14 is fixedly installed on the side of the cavity 10 near the inner cavity of the housing 1. The heat-conducting plate 14 is made of copper or aluminum alloy thermally conductive material. It can quickly conduct the heat dissipated by the electrical components 201 inside the housing and accelerate the response speed of the inert gas inside the cavity 10 to thermal expansion.

[0027] The cavity 10 is filled with an inert gas, which can be any one of argon, nitrogen, helium and neon. Such gases are chemically stable and do not easily deteriorate. They have good thermal expansion effect and can stably generate volume deformation by temperature change, ensuring the long-term stable operation of the overall temperature control and heat dissipation structure.

[0028] At the end of the through-hole 7 facing inwards towards the housing 1, multiple elastic flaps 15 are fixedly mounted in a circumferential array along its edge. The elastic flaps 15 are integrally molded from rubber and have good elastic deformation capability. Under normal conditions, the multiple elastic flaps 15 form a tubular structure. A driving component is installed inside the through-hole 7. The driving component is used to drive the ends of the multiple elastic flaps 15 to extend and open outwards, so that the multiple elastic flaps 15 together form a trumpet-shaped structure, thereby increasing the flow cross-sectional area and flow velocity of gas when passing through the through-hole 7, and improving heat dissipation efficiency.

[0029] Specifically, the drive assembly includes a fixed frame 16 and a first inclined block 17, wherein the fixed frame 16 is fixedly assembled inside the through hole 7. A receiving groove 18 is provided in the through hole 7, and the first inclined block 17 is slidably installed in the receiving groove 18 and fixedly connected to the corresponding connecting rod 12. The side of the first inclined block 17 away from the sealing plate 8 has an inclined surface. A sliding hole is provided at the center of the fixed frame 16 along the axial direction of the through hole 7, and a sliding rod 19 is slidably assembled in the sliding hole. The sliding rod 19 can reciprocate along the axial direction of the through hole 7. A second inclined block 20 is fixedly installed at one end of the sliding rod 19 near the sealing plate 8. The side of the second inclined block 20 corresponding to the first inclined block 17 has a matching inclined surface. When the first inclined block 17 moves upward synchronously with the connecting rod 12, the inclined surface of the second inclined block 20 and the inclined surface of the first inclined block 17 fit together and slide together. Through the guiding effect of the inclined surface, the sliding rod 19 is driven to slide along the axial direction of the through hole 7 away from the sealing plate 8.

[0030] A fixing plate 21 is fixedly installed at the end of the sliding rod 19 away from the second inclined block 20. Multiple hinge rods 22 are circumferentially arrayed and hinged on the fixing plate 21. The end of each hinge rod 22 away from the fixing plate 21 is respectively hinged to the end of the corresponding elastic petal 15 away from the through hole 7. A spring 23 is fixedly installed between the fixing plate 21 and the fixing frame 16. The spring 23 is coaxially sleeved on the outer periphery of the sliding rod 19, and both ends of the spring 23 are fixedly connected to the end face of the fixing plate 21 and the center of the fixing frame 16, respectively. Under normal conditions, the spring 23 is in a natural extension and contraction state, which facilitates the sliding rod 19 to return to its original position.

[0031] As the connecting rod 12 drives the sealing plate 8 upward to gradually open the through hole 7, the connecting rod 12 simultaneously drives the first inclined block 17 to move upward as well. After the sealing plate 8 moves upward along the slide groove 9 to the point where the through hole 7 is fully open, the inclined surface of the first inclined block 17 and the inclined surface of the second inclined block 20 come into contact with each other.

[0032] If the temperature of the local electrical component 201 continues to rise, the inert gas inside the cavity 10 will continue to expand due to heat, further pushing the push plate 11 upward. The push plate 11 will then drive the sealing plate 8 to continue moving upward via the connecting rod 12. Because a clearance is reserved above the slide groove 9 for the movement of the sealing plate 8, the sealing plate 8 will not hinder the upward movement of the connecting rod 12 during its continuous upward movement.

[0033] During this process, the connecting rod 12 drives the first inclined block 17 to continue moving upward. Relying on the sliding fit between the two inclined surfaces, the sliding rod 19 is pushed to slide along the through hole 7 towards the side away from the sealing plate 8. The sliding rod 19 simultaneously drives the fixed plate 21 to move. The fixed plate 21 drives the ends of each hinge rod 22 to rotate, thereby pulling the ends of each elastic petals 15 away from the through hole 7 to extend outward. This causes all the elastic petals 15 to combine to form a trumpet-shaped flow guiding structure. As the airflow flows through the ventilation channel formed by the trumpet-shaped structure and the through hole 7, the flow cross-section gradually decreases, the airflow is compressed and converged, and the flow speed increases accordingly. At the same time, the trumpet opening can form a converging and guiding effect on the external cold air, reducing the flow resistance when the airflow enters the through hole 7, making the airflow per unit time larger, effectively improving the airflow rate, and further enhancing the local heat exchange and heat dissipation effect.

[0034] A pleated structure 24 is fixedly installed between adjacent elastic petals 15. This pleated structure 24 is made of elastic rubber fabric and has good stretching and deformation capabilities. When multiple elastic petals 15 together form a trumpet-shaped structure, adjacent elastic petals 15 can pull the pleated structure 24 to unfold and form a fan-shaped sealing surface to seal the gaps between adjacent elastic petals 15, so that all elastic petals 15 form a sealed and complete trumpet-shaped integral structure. This eliminates turbulence and disturbances caused by gaps, ensures that the airflow flows smoothly and directionally along the trumpet opening, and stably achieves the airflow acceleration effect.

[0035] Working principle: When the electrical components 201 inside the housing 1 experience localized temperature rise, the inert gas in the cavity 10 near the corresponding heat source expands due to heat, causing the push plate 11 to move. The push plate 11, through the connecting rod 12, synchronously drives the sealing plate 8 to slide, opening the through hole 7 at the corresponding position. During the movement of the push plate 11, the displacement sensor moves synchronously, and the displacement sensor transmits the collected displacement electrical signal to the controller. After receiving the signal, the controller controls the fan 6 to start running.

[0036] When the fan 6 is working, the hot air accumulated around the high-temperature electrical component 201 is discharged out of the box 1 through the open through hole 7, U-shaped groove 4 and exhaust groove 5. The outside cold air enters the box through the air inlet 13 at the bottom of the box 1 after being filtered by the filter screen, thereby increasing the air circulation rate around the high-temperature electrical component 201. It can achieve precise heat dissipation of the heat-generating area according to the actual temperature distribution in the box, so that the heat dissipation airflow can be accurately applied to the heat-generating components.

[0037] As the connecting rod 12 drives the sealing plate 8 upward to gradually open the through hole 7, the connecting rod 12 simultaneously drives the first inclined block 17 to move upward as well. After the sealing plate 8 moves upward along the slide groove 9 to the point where the through hole 7 is fully open, the inclined surface of the first inclined block 17 and the inclined surface of the second inclined block 20 come into contact with each other.

[0038] If the temperature of the local electrical component 201 continues to rise, the inert gas inside the cavity 10 continues to expand due to heat, further pushing the push plate 11 upward. The push plate 11, through the connecting rod 12, drives the sealing plate 8 to continue to move upward. During this process, the connecting rod 12 drives the first inclined block 17 to continue to move upward. Relying on the sliding fit between the two inclined surfaces, the sliding rod 19 is pushed to slide along the through hole 7 axially away from the sealing plate 8. The sliding rod 19 synchronously drives the fixed plate 21 to move. The fixed plate 21 drives the ends of each hinge rod 22 to rotate, thereby pulling the ends of each elastic petal 15 away from the through hole 7 to extend and open outward. This allows all the elastic petals 15 to combine to form a trumpet-shaped flow guiding structure. As the airflow flows through the ventilation channel formed by the trumpet-shaped structure and the through hole 7, the flow cross-section gradually decreases, the airflow is compressed and converged, and the flow speed increases accordingly. At the same time, the trumpet opening can form a converging and guiding effect on the external cold air, reducing the flow resistance when the airflow enters the through hole 7, making the airflow per unit time larger, effectively improving the airflow rate, and further enhancing the local heat exchange and heat dissipation effect.

[0039] When multiple elastic petals 15 together form a trumpet-shaped structure, adjacent elastic petals 15 can pull the pleated structure 24 to unfold and form a fan-shaped sealing surface to seal the gaps between adjacent elastic petals 15, so that all elastic petals 15 form a sealed and complete trumpet-shaped integral structure. This eliminates turbulence and disturbance caused by gaps, ensures that the airflow flows smoothly and directionally along the trumpet opening, and stably achieves the airflow acceleration effect.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A photovoltaic intelligent grid-connected metering box, comprising a box body (1) and a box door (3), characterized in that: The box (1) has multiple U-shaped grooves (4) arranged at equal intervals along its vertical direction. One side of the box (1) also has an exhaust trough (5) connecting each U-shaped groove (4). The exhaust trough (5) communicates with the outside of the box (1). A fan (6) is fixedly installed on one side of the box (1), and the fan (6) communicates with the exhaust trough (5). Multiple through holes (7) communicating with the inside of the box (1) are opened along the path of each U-shaped groove (4). A sealing plate (8) is slidably installed. In the side wall of the box body (1) except for the side where the box door (3) is located, multiple cavities (10) for storing inert gas are arranged vertically at equal intervals. A push plate (11) is slidably installed in the cavity (10) and is connected to the sealing plate (8). When the inert gas in the cavity (10) is heated and expands, it pushes the push plate (11) to move. The push plate (11) drives the sealing plate (8) to slide to open the through hole (7). The through hole (7) has an opening at one end facing the inside of the box (1), and multiple elastic petals (15) are fixedly arranged in a circumferential array. A driving component is provided inside the through hole (7), which is used to drive the ends of the multiple elastic petals (15) to extend outward and open together to form a trumpet-shaped structure. The drive assembly includes a fixed frame (16) fixedly disposed in the through hole (7) and a first inclined block (17) disposed on the sealing plate (8). A sliding rod (19) is slidably disposed at the center of the fixed frame (16) along the axial direction of the through hole (7). A second inclined block (20) that slides and engages with the first inclined block (17) is fixedly disposed at one end of the sliding rod (19) near the sealing plate (8). A fixed plate (21) is fixedly disposed at the other end of the sliding rod (19). A plurality of hinge rods (22) are hingedly disposed on the fixed plate (21). The other end of the hinge rod (22) is hingedly connected to the corresponding elastic flap (15). A spring (23) is fixedly disposed between the fixed plate (21) and the fixed frame (16).

2. The photovoltaic intelligent grid-connected metering box according to claim 1, characterized in that, A pleated structure (24) is fixedly provided between the adjacent elastic petals (15). When multiple elastic petals (15) form a trumpet-shaped structure together, the adjacent elastic petals (15) can pull the pleated structure (24) to unfold and form a fan-shaped sealing surface to seal the gap between the adjacent elastic petals (15) so that all elastic petals (15) form a sealed and complete trumpet-shaped overall structure.

3. The photovoltaic intelligent grid-connected metering box according to claim 1, characterized in that, The inner wall of the through hole (7) is provided with a groove (9) perpendicular to the axis of the through hole (7). The sealing plate (8) is slidably disposed inside the groove (9). A connecting rod (12) is fixedly disposed at the bottom end of the sealing plate (8). The connecting rod (12) is fixedly connected to the corresponding push plate (11).

4. The photovoltaic intelligent grid-connected metering box according to claim 1, characterized in that, The cavity (10) is fitted with a heat-conducting plate (14) on the side close to the inner cavity of the box (1), and the heat-conducting plate (14) is made of heat-conducting material.

5. The photovoltaic intelligent grid-connected metering box according to claim 4, characterized in that, The thermally conductive material is copper or aluminum alloy.

6. The photovoltaic intelligent grid-connected metering box according to claim 1, characterized in that, The inert gas filled in the cavity (10) is any one of argon, nitrogen, helium and neon.

7. The photovoltaic intelligent grid-connected metering box according to claim 1, characterized in that, The bottom of the box (1) is provided with air inlets (13) evenly spaced, and a filter screen is fixedly installed inside the air inlets (13).

8. The photovoltaic intelligent grid-connected metering box according to claim 1, characterized in that, The housing (1) is equipped with a controller, and the push plate (11) is equipped with a displacement sensor. The displacement sensor is electrically connected to the controller, and the controller is electrically connected to the fan (6).

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