An electric energy metering box

Abstract

The application discloses an electric energy metering box, and relates to the technical field of electric energy metering boxes, which comprises a metering box body, a box door, a control panel and a heat dissipation unit. The metering box body is a hollow cuboid structure, and a hollow area in the metering box body constitutes an installation cavity. A plurality of heat dissipation holes one and heat dissipation holes two in a matrix distribution are formed in the left and right side walls of the metering box body, and the heat dissipation holes one are located above the heat dissipation holes two. The heat dissipation unit is arranged in the installation cavity and is used for separating the installation cavity into an upper space and a lower space and driving the flow of gas in the cavity to dissipate heat. The electric energy metering box can meet the outdoor protection level, reduce the surface condensation risk of electrical components in the box, control the humidity in the box and improve the all-weather environmental self-adaptive capability.

Description

Technical Field

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

[0002] As a key terminal device in the power supply circuit, the electricity metering box integrates metering instruments and protection devices, featuring IP protection and anti-theft structures to ensure data accuracy and integrity. As a core node in the front-end sensing layer of the smart grid, this device not only serves as the legal basis for trade settlement but also provides a highly reliable physical carrier for the AMI system, supporting remote monitoring, precise load control, and refined line loss analysis. It is the infrastructure that ensures the credibility of power system metering and the implementation of digital business.

[0003] Chinese invention patent CN113712300B discloses a multifunctional electricity metering box, relating to the technical field of electricity metering boxes. The box includes an electricity metering box with connecting slots on both side walls, each connecting slot containing a first inner slot. Both side walls also have first and second heat dissipation vents, with the second vents located below the first vents. A door is hinged to the box, with an observation window and control panel. A receiving slot is formed on the side wall, and a protective cover is fixedly installed above the receiving slot. A fixed housing is fixedly installed on the top of the inner wall. This invention's adaptive mechanism reduces malfunctions caused by overheating or humidity, lowers maintenance costs, protects electrical components, ensures stable system operation, and improves equipment reliability and stability.

[0004] Considering that electricity metering boxes, as outdoor power distribution facilities, often face complex meteorological environments, especially under conditions of high humidity, heavy rain, and large diurnal temperature variations, the aforementioned solution, while achieving basic rain protection through the staggered placement of heat dissipation vents on the movable mounting bracket, relies entirely on the flat contact between the mounting bracket's sidewall and the box body. Lacking rubber seals, gaps are easily created after long-term thermal expansion and contraction or vibration, making it difficult to withstand direct high-pressure water jets and failing to meet outdoor protection requirements. Furthermore, the closed passageway in rainproof mode creates a semi-enclosed space inside the box, making it prone to condensation on electrical components during periods of large diurnal temperature variations. This can cause insulation resistance to fall below the safe threshold of 0.5MΩ, leading to insulation degradation or even breakdown. In addition, the existing structure lacks an active dehumidification mechanism; natural air circulation only dissipates heat and cannot regulate humidity. In extreme environments with relative humidity above 95% or after heavy rain, it cannot effectively control the humidity inside the box, and the manual adjustment mode is difficult to adapt to coupled temperature and humidity changes, resulting in insufficient equipment reliability. Summary of the Invention

[0005] This application provides an electricity metering box that solves the technical problems of poor rainproof sealing reliability, easy condensation in semi-enclosed spaces, lack of active dehumidification means, and inability to adaptively adjust according to temperature and humidity coupling changes in the prior art. It achieves the technical effects of meeting outdoor protection level, reducing the risk of surface condensation on electrical components inside the box, controlling the humidity inside the box, and improving the all-weather environmental adaptability.

[0006] This application provides an electricity metering box, including a metering box body, a box door, a control panel and a heat dissipation unit; the metering box body is a hollow cuboid structure, and its internal hollow area forms an installation cavity.

[0007] The metering box has several heat dissipation holes 1 and 2 arranged in a matrix on its left and right side walls, with heat dissipation hole 1 located above heat dissipation hole 2; the heat dissipation unit is installed inside the mounting cavity to divide the inside of the mounting cavity into an upper space and a lower space, and to drive the gas flow inside the cavity for heat dissipation.

[0008] Furthermore, the door is hinged to the front wall of the metering box and is used to close or open the installation cavity; the inner sides of the left and right side walls of the metering box are vertically provided with moving grooves and sliding grooves; several electrical components are fixed to the inner side of the rear side wall of the metering box; the control panel is embedded and fixed to the upper outer side of the door and integrates a humidity sensor inside; temperature sensors are provided on the inner side of the control panel and the inner side of the metering box.

[0009] Furthermore, the heat dissipation unit includes a movable plate, a horizontal frame, a blower membrane, and a cover layer;

[0010] Two rectangular movable plates are provided, each slidably connected to corresponding movable slots on the left and right side walls of the metering chamber via electric sliders. Each movable plate has several exhaust channels evenly distributed along its length. The exhaust channels are vertically arranged and include a vertical section and several inclined sections, with the inclined sections opening towards the upper space. The horizontal frame is a rectangular frame structure, with its upper left and right sides fixedly connected to the two movable plates respectively. The outer perimeter of the horizontal frame is sealed and slides against the inner wall of the metering chamber. Several through slots are evenly distributed on the upper surfaces of both sides of the horizontal frame, each through slot corresponding to and communicating with the vertical section of the exhaust channel.

[0011] The blower membrane is made of flexible material, and its outer periphery is sealed and fixed inside the horizontal frame, dividing the mounting cavity into upper and lower parts with the horizontal frame. The cover is a cover structure made of flexible material, with two covers arranged in a mirror image. The upper ends of the two covers are fixed to the bottom of the left and right ends of the horizontal frame, and the lower ends of the two covers are fixed to the lower part of the left and right inner sidewalls of the metering box, respectively. The two covers are slidably connected to the corresponding slide grooves on the side of the left and right inner sidewalls of the metering box by sliders, and the covers slide in a sealed manner along the slide grooves.

[0012] Furthermore, storage frames are fixed to the left and right inner walls of the metering box. When the cover is not initially unfolded, it is pressed and stored in the storage frames. After unfolding, the unfolded surface of the cover covers the inner side of the heat dissipation holes in the corresponding area.

[0013] Furthermore, the heat dissipation unit also includes an electrically controlled magnetic block and a circular plate;

[0014] The electrically controlled magnetic block is fixed at the center of the top wall of the metering box; the circular plate is fixed in the middle of the blower membrane, is made of metal, and is on the same vertical line as the electrically controlled magnetic block and is directly opposite to it; the blower membrane and the circular plate form a deformable top wall structure, and the circular plate is attracted to move up and down by magnetic switching, thereby discharging the hot air in the upper space from the exhaust channel through the through groove and the cover to the outside of the heat dissipation hole.

[0015] Furthermore, magnetic layers are provided on the opposite surfaces of the two cover layers, and the two magnetic layers have opposite magnetic properties; during the process of the moving plate moving upward and driving the cover layers to unfold, the two cover layers unfold towards each other through the attraction of opposite poles of the magnetic layers, forming a drainage channel that wraps around the inner side of the heat dissipation hole two.

[0016] An auxiliary block is fixed below the circular plate. The longitudinal section of the auxiliary block is an inverted trapezoidal structure, and electrically controlled magnetic plates are embedded on both the left and right sides of its horizontal section. When the electrically controlled magnetic plate is energized, the polarity of the side of the magnetic plate closest to the cover layer can be switched in a controllable manner.

[0017] When the electrically controlled magnetic plates on both sides are energized, they generate the same polarity as the magnetic layers on the adjacent cover. Through the repulsion of like poles, the cover is driven to tightly adhere to the inner wall of the metering box, thereby blocking the second heat dissipation hole. This prevents the circular plate from generating negative pressure when falling, which would cause the airflow to flow back from the second heat dissipation hole to the upper space, thus achieving unidirectional heat dissipation.

[0018] Furthermore, the upper surface of the circular plate is uniformly provided with a number of through semi-cylindrical holes along its circumference, and the holes are covered with a sealing film. The sealing film is a semi-circular elastic sheet with its straight side fixed to the upper surface of the circular plate, and a magnetic layer is provided on the lower surface of its arc-shaped side, which is magnetically attracted to the upper surface of the circular plate to seal the through holes.

[0019] The magnetic attraction between the sealing membrane and the circular plate is less than the air pressure difference generated when the blower membrane moves downward, and the elastic restoring force of the blower membrane is greater than the sum of the total weight of the auxiliary block, the electrically controlled magnetic plate, the circular plate and the sealing membrane.

[0020] Furthermore, a suction pipe is provided at the bottom of the metering box. The suction pipe is arranged vertically, with its upper end communicating with the lower space and its lower end extending to the outside of the metering box and equipped with a one-way valve. A filter layer filled with desiccant is provided inside the upper end of the suction pipe.

[0021] Furthermore, the lower part of the left and right side walls of the metering box is fixed with a replacement plate in a detachable manner; the side of the replacement plate near the inner side of the mounting cavity is embedded with a water-absorbing sponge, which is located between the cover and the left and right side walls of the metering box, and is used to absorb the condensate flowing down from the exhaust duct or the inner wall of the cover.

[0022] Furthermore, an opening membrane is fixed at the air inlet of the exhaust duct; the opening membrane is a valve structure and is made of a composite material of shape memory polymer and moisture-absorbing and expanding polymer; when the temperature inside the chamber rises, the shape memory polymer drives the opening membrane to open due to heat; when the ambient humidity increases, the moisture-absorbing and expanding polymer absorbs water and expands, driving the opening membrane to curl further and increase the opening degree.

[0023] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0024] By moving the plate upwards to close the lower-level heat dissipation hole one and opening the higher-level heat dissipation hole two, the heat dissipation path is switched to prevent direct rainwater intrusion. By setting up an exhaust duct to extend the airflow path, water vapor condenses on the inclined pipe wall and flows outwards, achieving pre-humidification and preventing condensation from dripping into the upper electrical space. An electrically controlled magnetic block attracts a circular plate, driving the blower membrane to reciprocate and deform, generating controllable positive and negative pressure to achieve active ventilation and precise adjustment of heat dissipation intensity. The cover layer expands by attracting opposite poles to form a drainage channel, while like poles repel and adhere to the box wall to seal the second heat dissipation hole, achieving unidirectional exhaust and preventing backflow. A desiccant inside the suction pipe actively draws in external dryness under negative pressure. Dry air replaces the moisture in the lower layer and replenishes the upper layer through the pores, maintaining the dryness of the core area; the opening degree is adaptively adjusted by the dual response of temperature and humidity of the open membrane to match the heat dissipation and dehumidification needs; condensate is easily collected by a removable and replaceable plate and water-absorbing sponge, reducing maintenance costs; it effectively solves the technical problems of poor rainproof sealing reliability, easy condensation in semi-enclosed spaces, lack of active dehumidification means, and inability to adaptively adjust according to temperature and humidity coupling changes in existing technologies, and achieves the technical effects of meeting outdoor protection levels, reducing the risk of surface condensation on electrical components inside the box, controlling the humidity inside the box, and improving the all-weather environmental adaptability. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of an electricity metering box according to the present invention.

[0026] Figure 2 This is a schematic diagram of the side structure of an energy metering box according to the present invention.

[0027] Figure 3 This is a schematic diagram of the internal structure of an energy metering box in its initial state according to the present invention.

[0028] Figure 4This is a longitudinal full sectional view of an energy metering box in its initial state according to the present invention.

[0029] Figure 5 This invention relates to an electricity metering box. Figure 4 A magnified view of a portion of point A in the middle.

[0030] Figure 6 This is a schematic diagram of the structure of an electric energy metering box according to the present invention, showing the moving plate, horizontal frame, and blower membrane after they move upward and the cover layer unfolds.

[0031] Figure 7 This invention relates to an electricity metering box. Figure 6 A magnified view of a portion of point B in the middle.

[0032] Figure 8 This is a schematic diagram of the structure of an electricity metering box according to the present invention, showing the moving plate, horizontal frame, and blower membrane moving upwards and the blower membrane continuing to arch upwards.

[0033] Figure 9 This is a schematic diagram of the structure of the movable plate, horizontal frame and blower membrane of an energy metering box according to the present invention.

[0034] In the diagram: 100, Metering box; 101, Moving groove; 102, Slide groove; 110, Box door; 120, Control panel; 130, Electrical components; 140, Heat dissipation hole one; 150, Heat dissipation hole two; 160, Replacement plate; 161, Absorbent sponge; 200, Heat dissipation unit; 201, Electric slider; 210, Moving plate; 211, Exhaust duct; 212, Opening membrane; 220, Horizontal frame; 221, Through groove; 230, Blowing membrane; 240, Electromagnetic block; 250, Circular plate; 251, Through hole; 252, Sealing membrane; 260, Cover layer; 261, Storage frame; 262, Magnetic layer; 270, Auxiliary block; 271, Electromagnetic plate; 280, Suction pipe. Detailed Implementation

[0035] To facilitate understanding of the present invention, a more complete description of this application will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to enable a more thorough and complete understanding of the disclosure of the present invention.

[0036] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] Example 1: As Figure 1 and Figure 2 As shown, this application discloses an electricity metering box, which includes a metering box body 100, a box door 110, a control panel 120, and a heat dissipation unit 200; the metering box body 100 is a hollow cuboid structure, and its internal hollow area forms an installation cavity.

[0039] The metering box 100 has several heat dissipation holes 140 and 150 arranged in a matrix on its left and right side walls, respectively. The heat dissipation holes 140 are located above the heat dissipation holes 150. The heat dissipation unit 200 is installed inside the mounting cavity to divide the inside of the mounting cavity into an upper space and a lower space, and to drive the gas flow inside the cavity for heat dissipation.

[0040] like Figures 1 to 7 As shown, the door 110 is hinged to the front wall of the metering box 100 and is used to close or open the installation cavity; the inner sides of the left and right side walls of the metering box 100 are vertically provided with moving grooves 101 and sliding grooves 102; a number of electrical components 130 are fixed to the inner side of the rear side wall of the metering box 100; the control panel 120 is embedded and fixed to the upper outer side of the door 110 and integrates a humidity sensor inside; temperature sensors are provided on the inner side of the control panel 120 and the inner side of the metering box 100.

[0041] This application solves the problem of condensation caused by large day-night temperature differences in the semi-enclosed space under rainproof mode by setting a heat dissipation unit 200 inside the metering box 100, dividing the interior of the metering box 100 into an upper circulation space and a lower enclosed space, and setting heat dissipation holes 140 and 150 to form a dual-channel heat dissipation channel with high and low positions. Specifically, in the initial state, the upper space, as the circulation space where the electrical components 130 are located, maintains normal pressure to achieve basic circulation heat dissipation, while the lower space is an independent enclosed space. The switching of the entire working mode is mainly controlled by the control unit 200. The humidity sensor and temperature sensor inside the control panel 120 detect the external environment and the internal environment of the chamber. Based on the detection results, the heat dissipation unit 200 is activated adaptively. The dual-channel opening and closing of heat dissipation hole 140 and heat dissipation hole 150 is controlled to achieve adaptive heat dissipation mode switching. The direct contact between the high humidity environment outside and the electrical components 130 is blocked by physical separation. When the external humidity is high, the heat dissipation unit 200 performs adaptive heat dissipation to ensure that the area where the upper electrical components 130 are located is not affected by the humid heat convection caused by the temperature difference between the inside and outside of the chamber, and to reduce the condensation inside the chamber.

[0042] like Figures 2 to 8 As shown, the heat dissipation unit 200 includes a movable plate 210, a horizontal frame 220, a blower membrane 230, and a cover layer 260;

[0043] Two movable plates 210 are provided, each with a rectangular plate structure, and both are slidably connected to corresponding movable slots 101 in the left and right side walls of the metering box 100 via electric sliders 201. Several exhaust channels 211 are evenly distributed along the length of each movable plate 210. Each exhaust channel 211 is vertically arranged and includes a vertical section and several inclined sections, with the inclined sections opening towards the upper space. The horizontal frame 220 is a rectangular frame structure, with its upper left and right sides fixedly connected to the two movable plates 210 respectively. The outer periphery of the horizontal frame 220 is sealed and slides against the inner wall of the metering box 100. Several through slots 221 are evenly distributed on the upper surfaces of both sides of the horizontal frame 220, each through slot 221 corresponding to a vertical section of the exhaust channel 211 and communicating with its interior.

[0044] The blower membrane 230 is made of flexible material, and its outer periphery is sealed and fixed inside the horizontal frame 220, dividing the mounting cavity into upper and lower parts with the horizontal frame 220. The cover layer 260 is a cover structure made of flexible material, and there are two of them arranged in a mirror image. The upper ends of the two cover layers 260 are fixed to the bottom of the left and right ends of the horizontal frame 220, and the lower ends of the two cover layers 260 are fixed to the lower part of the left and right inner sidewalls of the metering box 100, respectively. The two cover layers 260 are slidably connected to the corresponding slide grooves 102 on the side of the left and right inner sidewalls of the metering box 100 by sliders, and the cover layer 260 slides in a sealed manner along the slide grooves 102.

[0045] The metering box 100 has storage frames 261 fixed on its left and right inner walls. The cover 260 is pressed and stored in the storage frames 261 in its initial unexpanded state. After the cover 260 is unfolded, the unfolded surface covers the inner side of the second heat dissipation hole 150 in the corresponding area. When the electric slider 201 moves the moving plate 210 to the working position, the outer wall of the moving plate 210 fits and seals the first heat dissipation hole 140. At the same time, the upper port of the inclined section of the exhaust duct 211 faces the upper space, and the lower port of the exhaust duct 211 is connected to the through groove 221 on the horizontal frame 220, realizing the formation and switching of the heat dissipation path of the second heat dissipation hole 150.

[0046] This application solves the problems of a single heat dissipation channel, inability to pre-treat incoming airflow, and direct entry of moisture into the chamber in high-humidity environments, leading to insulation degradation, by setting up a coordinated arrangement of the movable plate 210, horizontal frame 220, blower membrane 230, and cover layer 260 in the heat dissipation unit 200. Specifically, when the external humidity is detected to be high (i.e., rain or heavy rain) reaching a threshold but the temperature difference between the inside and outside of the chamber (specifically the temperature between the upper space and the outside of the chamber) is small, in order to prevent external moisture from entering the chamber and condensing, and to prevent damage to the internal electrical components 130 and their internal components in the metering chamber 100, this application addresses these issues. In this application, the electric slider 201 drives the moving plate 210 to move upward to switch the heat dissipation path, that is, to close the first heat dissipation hole 140 and open the second heat dissipation hole 150, so that the gas in the box passes through the exhaust channel 211 opened on the moving plate 210, through the through groove 221 of the horizontal frame 220 and is discharged from the second heat dissipation hole 150, and the gas automatically circulates and dissipates heat. During this process, the upper end of the cover 260 fixed on both sides of the horizontal frame 220 moves upward to unfold itself and wrap the second heat dissipation hole 150, so that the exchange between the upper space and the outside world does not come into contact with the lower closed space.

[0047] Meanwhile, this application switches the heat dissipation path and extends the airflow path by using the exhaust duct 211, changing the heat dissipation path from a low-level direct flow to a high-level detour. This allows the high-temperature air inside to fully exchange heat with the low-temperature environment outside when it flows through the exhaust duct 211, as the path is extended. This causes water vapor to condense on the inclined pipe wall (or the humid air outside is dried by the pre-heated temperature inside the chamber before entering the upper space). The condensate flows along the inclined wall to the lowest point due to gravity and will not drip into the upper space, thus achieving pre-condensation and greatly reducing the probability of moisture entering the upper space.

[0048] like Figures 2 to 8 As shown, the heat dissipation unit 200 also includes an electrically controlled magnetic block 240 and a circular plate 250;

[0049] The electrically controlled magnetic block 240 is fixed at the center of the inner top wall of the metering box 100; the circular plate 250 is fixed in the middle of the blower membrane 230, is made of metal, and is on the same vertical line as the electrically controlled magnetic block 240 and is directly opposite to it; the blower membrane 230 and the circular plate 250 form a deformable top wall structure, and the circular plate 250 is attracted to move up and down by magnetic switching, thereby discharging the hot air in the upper space from the exhaust channel 211 through the through groove 221 and the cover layer 260 to the outside of the heat dissipation hole 2 150.

[0050] like Figures 6 to 8 As shown, magnetic layers 262 are provided on the opposite surfaces of the two cover layers 260, and the two magnetic layers 262 have opposite magnetic properties; during the process of the moving plate 210 moving upward and causing the cover layers 260 to unfold, the two cover layers 260 unfold towards each other through the attraction of opposite poles of the magnetic layers 262, forming a drainage channel that wraps the inside of the heat dissipation hole 150.

[0051] An auxiliary block 270 is fixed below the circular plate 250. The longitudinal section of the auxiliary block 270 is an inverted trapezoidal structure, and an electrically controlled magnetic plate 271 is embedded on both the left and right sides of its horizontal section. When the electrically controlled magnetic plate 271 is energized, the polarity of the side of the magnetic plate 271 closest to the cover layer 260 can be switched in a controllable manner.

[0052] When the electrically controlled magnetic plates 271 on both sides are energized, they generate the same polarity as the magnetic layer 262 on the adjacent cover 260. Through the repulsion of like poles, the cover 260 is driven to tightly adhere to the inner wall of the metering box 100, thereby blocking the heat dissipation hole 150. This prevents the circular plate 250 from generating negative pressure when it falls, causing airflow to flow back from the heat dissipation hole 150 to the upper space, thus achieving unidirectional heat dissipation.

[0053] The vertical section of the auxiliary block 270 is an electrically controlled telescopic structure, capable of flexibly adapting its height according to the position of the magnetic layer 262 of the cover 260. After the electrically controlled magnetic plate 271 moves downward, it is at the same height as the corresponding magnetic layer 262. When energized, it generates the same magnetic poles as the corresponding magnetic layer 262, achieving like poles repulsion. The repulsive force is horizontal and outward (pointing to the outer sidewalls of the left and right sides of the enclosure), driving the middle of the cover 260 to move outward until it fits against the inner sidewall of the enclosure, sealing the second heat dissipation hole 150 and preventing the backflow of externally exhausted gas. Furthermore, the magnetic layers 262 on opposite sides of the two cover layers 260 have opposite magnetic properties. Under the traction of the upward movement of the horizontal frame 220, the cover layers 260 are pulled out from the storage frame 261. At the same time, with the help of the magnetic force of opposite poles attracting each other, the two cover layers 260 are moderately bent in the direction of mutual approach to form a drainage channel, which encloses the second heat dissipation hole 150. The magnitude of the magnetic attraction between the two is less than the upward traction force of the horizontal frame 220, so as to avoid the magnetic force dominating and causing the cover layers 260 to be too close together or even stick together.

[0054] It should be noted that the upward movement of the horizontal frame 220 actually compresses the upper space and expands (rather than compresses) the lower space, creating a negative pressure in the lower layer. At this time, the one-way valve in the suction pipe 280 is opened by this negative pressure, guiding external air through the desiccant filter and into the lower space in one direction, so there will be no problem of leakage of humid air from the lower layer. Furthermore, when the blower membrane 230 vibrates at high frequency, the air pressure fluctuations in the lower space can achieve the following: when moving upward, negative pressure air intake occurs; when moving downward, the lower space becomes positive pressure and the one-way valve can automatically close to prevent backflow. At the same time, the positive pressure in the lower space accurately replenishes the stored dry air to the internal area of ​​the upper space through the through hole 251. The one-way valve (and optional suction pump) configured in the suction pipe 280 can ensure the unique unidirectionality of the air intake direction. Air pressure fluctuations will not disrupt stable air intake. It also enhances the active dehumidification cycle of "negative pressure storage of dry air and positive pressure replacement". It is closely coupled with the magnetic anti-backflow effect (the electrically controlled magnetic plate 271 is energized and the magnetic layer 262 of the cover 260 repels the same pole) and the up-and-down movement of the blower membrane 230 to pump the gas in and out of the upper and lower spaces. Together, they can achieve the technical effect of all-weather adaptive humidity control.

[0055] The activation of the electrically controlled magnetic block 240 occurs in two ways. First, if the temperature inside the chamber is too high and the external humidity detection does not reach the threshold, this application uses the magnetic attraction between the electrically controlled magnetic block 240 and the circular plate 250 to drive the blower membrane 230 to reciprocate, generating a controllable positive and negative pressure difference, thereby quickly expelling the hot air inside the chamber from the exhaust duct 211 to the outside of the second heat dissipation hole 150, achieving basic heat dissipation circulation. Second, if the external environment is highly humid, the auxiliary block 270, the magnetic layer 262, and the electrically controlled magnetic plate 271 can work together to allow the cover layer 260 to adhere to and block the corresponding second heat dissipation hole 150 after the blower membrane 230 falls, through the repulsion of like poles, preventing the backflow of humid air from the outside.

[0056] Specifically, when the electrically controlled magnetic block 240 is energized and generates magnetism, the blower diaphragm 230 arches upward to compress the upper space and form positive pressure exhaust; when the electrically controlled magnetic block 240 is de-energized, the blower diaphragm 230 elastically resets and stretches the upper space to form negative pressure intake. In order to prevent the negative pressure from sucking in external humid air, the magnetism 271 of the electrically controlled magnetic plate is switched to be the same pole as the magnetic layer 262 on the corresponding cover layer 260, driving the cover layer 260 to adhere to the box wall and block the heat dissipation hole 150, so as to ensure the humidity of the upper space where the upper electrical components 130 are located is stable.

[0057] like Figures 6 to 9As shown, the upper surface of the circular plate 250 is uniformly provided with a plurality of through semi-cylindrical holes 251 along its circumference, and the holes 251 are covered with a sealing film 252. The sealing film 252 is a semi-circular elastic sheet, with its straight side fixed to the upper surface of the circular plate 250, and a magnetic layer is provided on the lower surface of its arc-shaped side, which is magnetically attracted to the upper surface of the circular plate 250 to seal the through holes 251.

[0058] The magnetic attraction between the sealing membrane 252 and the circular plate 250 is less than the air pressure difference generated when the blower membrane 230 moves downward, and the elastic restoring force of the blower membrane 230 is greater than the sum of the total weight of the auxiliary block 270, the electrically controlled magnetic plate 271, the circular plate 250 and the sealing membrane 252.

[0059] It should be noted that, in actual implementation, if the elastic restoring force of the blower diaphragm 230 is insufficient to overcome the total weight of the load, the material of the circular plate 250 can be changed to a magnetic material with fixed magnetic poles (the magnetism and magnetic force can be adjusted according to actual needs; based on this material, it is still attached to the open diaphragm 212 through weak magnetic attraction). Therefore, when the electrically controlled magnetic block 240 is de-energized, a weak reverse current can be applied to it to generate a repulsive force, actively pushing the circular plate 250 to fall and achieve reset.

[0060] like Figures 3 to 8 As shown, a suction pipe 280 is provided at the bottom of the metering chamber 100. The suction pipe 280 is arranged vertically, with its upper end communicating with the lower space and its lower end extending to the outside of the metering chamber 100 and equipped with a one-way valve. A filter layer filled with desiccant is provided inside the upper end of the suction pipe 280. Furthermore, a suction pump can be connected in series with the suction pipe 280. The suction pump is controlled by the control panel 120. When the negative pressure generated by the downward movement of the blower membrane 230 is insufficient to overcome the opening resistance of the one-way valve or the resistance of the desiccant, the suction pump starts to assist in suction, ensuring that external dry air can continuously enter the lower space of the metering chamber 100 through the suction pipe 280.

[0061] Specifically, during the upward movement of the blower diaphragm 230, the lower space is under negative pressure. The suction pipe 280 continuously draws in air, filtering impurities from the external gas through the filter layer and then adsorbing moisture with the desiccant before drawing it into the lower space of the metering chamber 100 in a dry state. When the blower diaphragm 230 reaches its upper stop point and begins to move downward (during this process, the electrically controlled magnetic plate 271 is energized and generates the same polarity as the corresponding magnetic layer 262, driving the cover layer 260 to adhere tightly through the repulsion of like poles). The heat dissipation hole 250 is sealed on the inner wall of the metering box 100. The upper space is under negative pressure, and the lower space is under positive pressure. The one-way valve is closed, and the pressure difference between the two spaces overcomes the magnetic attraction, pushing the sealing membrane 252 upward and opening the through hole 251. This allows the dry gas in the lower space to enter the upper space through the through hole 251 on the circular plate 250, realizing air replacement and one-way supplementary heat dissipation. When the blower membrane 230 continues to move upward again, the through hole 251 is covered and sealed again by the sealing membrane 252.

[0062] like Figures 2 to 5 As shown, the lower part of the left and right side walls of the metering chamber 100 is detachably fixed with a replacement plate 160. An absorbent sponge 161 is embedded in the side of the replacement plate 160 closest to the mounting cavity. The absorbent sponge 161 is located between the cover layer 260 and the left and right side walls of the metering chamber 100, and is used to absorb condensate flowing down from the exhaust duct 211 or the inner wall of the cover layer 260. A sealing layer is provided on the side of the replacement plate 160 that contacts the inside of the chamber. The detachable method includes snap-fit ​​and bolt connection, facilitating maintenance by simply removing the replacement plate 160 and taking out the absorbent sponge 161 for replacement or drying, thus extending the continuous operation cycle of the equipment.

[0063] like Figure 3 , Figure 6 and Figure 9 As shown, an open membrane 212 is fixed at the air inlet of the exhaust duct 211; the open membrane 212 is a valve structure and is made of a composite material of shape memory polymer and moisture-absorbing and expanding polymer; when the temperature inside the chamber rises, the shape memory polymer drives the open membrane 212 to open due to heat; when the ambient humidity increases, the moisture-absorbing and expanding polymer absorbs water and expands, driving the open membrane 212 to curl further and increase the opening degree.

[0064] Specifically, the opening membrane 212 in this application adopts a laminated composite structure of shape memory polymer (SMP) and moisture-expanding polymer (SAP) (i.e., SMP serves as the base layer to provide temperature response recovery force, and SAP serves as the windward active layer attached to the SMP surface, with the two layers bonded at the interface through chemical bonding or interpenetrating polymer networks). Furthermore, by utilizing the asymmetric geometric constraint of the valve root being fixed at the air inlet of the exhaust duct 211 and its free end extending inward into the airway, the volume / morphological change effects of the two materials are directionally transformed into a unified bending and curling motion rather than disordered expansion (the specific structural diagram of the valve is not shown separately as it is prior art and will not be elaborated upon). Based on this... When the temperature rises, the SMP layer undergoes a glass transition and recovers its pre-programmed memory state, which drives the opening membrane 212 to open, as it bends from the free end towards the center of the airway at high temperatures. When the humidity increases, the SAP active layer absorbs water and expands, generating a bending moment in the same direction due to the difference in expansion coefficients with the SMP layer, further pushing the SMP layer. The deformations of the two layers are superimposed in the same direction in geometric space. Even under conditions where temperature and humidity changes are asynchronous, the bending direction driven by the single-layer effect is geometrically constrained to be "towards the center of the airway" and will not result in reverse closure. This ensures that the valve opening adapts to changes in high temperature and high humidity coupling, achieving adaptive matching of "high temperature requires large air volume, and high humidity requires strong dehumidification".

[0065] This application addresses the problem of a single heat dissipation mechanism that cannot respond to coupled changes in temperature and humidity by setting an open membrane 212. Specifically, the open membrane 212 is a valve structure made of a composite material of shape memory polymer and moisture-absorbing and expanding polymer. Therefore, when the temperature inside the chamber or the introduced gas increases, the shape memory polymer drives the open membrane 212 to open due to heat, increasing the exhaust cross-sectional area. When the humidity of the introduced gas increases, the moisture-absorbing and expanding polymer absorbs water and expands, driving the open membrane 212 to further curl and increase the opening. This meets the actual needs of high temperature requiring large air volume and high humidity requiring strong dehumidification, and allows for flexible dynamic adjustment. It achieves the technical effect of automatically increasing ventilation volume under high temperature and high humidity conditions, avoiding condensation in semi-enclosed spaces, and improving the system's adaptability to environmental changes.

[0066] Preferably, the electrically controlled magnetic block 240 is connected to the control system of the control panel 120, and its magnetic attraction force is controlled by a PWM pulse width modulation signal. By adjusting the current of the electrically controlled magnetic block 240, the upward displacement of the circular plate 250 is controlled, thereby adjusting the degree of stretching deformation of the blower diaphragm 230 to control the positive pressure exhaust intensity of the upper space. By controlling the on / off frequency of the electrically controlled magnetic block 240, the reciprocating vibration frequency of the blower diaphragm 230 is adjusted to adapt to different heat dissipation requirements, so as to achieve precise matching between exhaust intensity and ambient temperature and humidity, and to dry the exhaust duct 211 by high-frequency vibration of the blower diaphragm 230.

[0067] It should be noted that all contact surfaces of components that come into contact with the metering box 100 in this application are provided with a sealing layer to ensure that the upper and lower spaces are completely sealed; the control system configured in the control panel 120 is used to coordinate the operation of the electric slider 201, the electrically controlled magnetic block 240, the electrically controlled magnetic plate 271 and the one-way valve (and the suction pump adapted according to subsequent needs), and is preferably a programmable logic controller; all of these are prior art and will not be described in detail here.

[0068] In actual operation, the steps of this embodiment are as follows:

[0069] S1: The humidity sensor and temperature sensor inside the control panel 120 collect external humidity data and internal and external temperature data in real time, and transmit the data to the control system for comparison and analysis.

[0070] S2: The heat dissipation unit 200 operates in three modes:

[0071] Scenario 1: When the weather is sunny and the temperature difference is suitable, the control system keeps the electric slider 201 in the initial position. At this time, the moving plate 210 does not move up, the heat dissipation hole 140 is open, and the gas in the upper space is cooled by natural convection through the heat dissipation hole 140.

[0072] Scenario 2: When the external humidity is detected to reach or be within the threshold and the temperature difference between the inside and outside of the chamber is large (i.e., the temperature inside the chamber is higher than the external temperature), the control system controls the electric slider 201 to start, which drives the moving plate 210 to move upward along the moving groove 101 to the working position. The outer wall of the moving plate 210 fits against and seals the heat dissipation hole 140. At the same time, the upper port of the inclined section of the exhaust duct 211 is aligned with the upper space, and the lower port is connected to the through groove 221 of the horizontal frame 220. During the upward movement of the moving plate 210, the horizontal frame 220 moves upward synchronously, pulling the cover layer 260 out of the storage frame 261 and unfolding. The two cover layers 260 are moderately bent towards each other under the magnetic assistance of the attraction between opposite poles, forming a drainage channel that wraps the inside of the heat dissipation hole 150.

[0073] Furthermore, the control system controls the intermittent switching of the electrically controlled magnetic block 240 on and off according to the heat dissipation requirements: During the power-on process, the electrically controlled magnetic block 240 generates magnetic attraction to move the middle of the circular plate 250 and the blower membrane 230 upward, causing the blower membrane 230 to stretch and deform, compressing the volume of the upper space, creating positive pressure in the upper space, and hot air is discharged from the heat dissipation hole 150 through the channel formed by the exhaust duct 211, the through groove 221 and the cover layer 260, and the exhaust duct 211, the through groove 221 and the cover layer 260 are dried by the discharged high-temperature internal gas; During the power-off process, the blower membrane 230 returns to its original position under its own elasticity and gravity, the volume of the upper space expands to form negative pressure, the lower space turns to positive pressure, and external air is drawn in to achieve heat dissipation. By quickly switching the power on and off of the electrically controlled magnetic block 240, rapid bidirectional heat dissipation of the upper space is achieved;

[0074] During the entire operation, the upward movement of the blower membrane 230 compresses the upper space, causing the lower space to expand and form a negative pressure. The one-way valve at the lower end of the suction pipe 280 opens, and the outside air is drawn into the lower space after being dried by the filter layer and desiccant.

[0075] Scenario 3: When the external humidity is detected to be much higher than the threshold, based on Scenario 2, the control system further controls the on / off state and magnetism of the electromagnetic plate 271 according to the heat dissipation requirements: During the downward movement of the blower membrane 230, the control system further controls the electromagnetic plate 271 to be energized, so that it generates the same polarity as the magnetic layer 262 on the adjacent cover layer 260. This causes the cover layer 260 to move and adhere to the inner wall of the metering box 100 through the repulsion of like poles during the downward movement of the blower membrane 230, thus blocking the second heat dissipation hole 150. At the same time, as the blower membrane 230 moves downward, the negative pressure in the upper space increases. When the pressure difference is greater than the magnetic attraction between the sealing membrane 252 and the circular plate 250, the sealing membrane 252 is pushed upward, opening the through hole 251. The dry gas in the lower space enters the upper space through the through hole 251, realizing gas replacement. When the blower membrane 230 returns to the lowest point, the sealing membrane 252 covers the through hole 251 again under the action of magnetic attraction.

[0076] S3: The control system controls the electronically controlled magnetic block 240 to be energized again, repeating the actions of S2 and S3 until the temperature and humidity meet the preset conditions.

[0077] S4: When it is necessary to press the cover layer 260 into the storage frame 261, the energized electromagnetic plate 271 repels the corresponding cover layer 260 so that it adheres to the left and right inner side walls of the box. Then, the electric slider 201 is controlled to move the moving plate 210 down to the initial position, pressing the cover layer 260 into the storage frame 261. When it is necessary to dry the exhaust duct 211, the control system increases the on / off frequency of the electromagnetic block 240, drives the blower diaphragm 230 to vibrate at high frequency, and uses the internal hot airflow to dry the exhaust duct 211. During maintenance, the replacement plate 160 on the side wall of the metering box 100 is removed, the water-absorbing sponge 161 is taken out for replacement or drying, and then the replacement plate 160 is reinstalled.

[0078] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages:

[0079] This application's electricity metering box switches the heat dissipation path by moving the movable plate 210 upwards to close the low-level heat dissipation hole 140 and open the high-level heat dissipation hole 150, thus preventing direct rainwater intrusion. The exhaust duct 211 extends the airflow path, causing water vapor to condense on the inclined pipe wall and flow outwards, achieving pre-dehumidification and preventing condensation from dripping into the upper electrical space. The electrically controlled magnetic block 240 attracts the circular plate 250, driving the blower membrane 230 to reciprocate and generate controllable positive and negative pressure, achieving active ventilation and precise adjustment of heat dissipation intensity. The cover layer 260 expands by attracting opposite poles to form a drainage channel, while the like poles repel and adhere to the box wall to seal off heat dissipation. Hole 150 enables unidirectional exhaust and backflow prevention; the suction pipe 280, with its built-in desiccant, actively draws in dry external air under negative pressure, replacing the moisture in the lower layer and replenishing the upper layer through the through hole 251, maintaining the dryness of the core area; the opening membrane 212 adaptively adjusts its opening degree to match heat dissipation and dehumidification requirements through dual temperature and humidity responses; the removable and replaceable plate 160 and the water-absorbing sponge 161 facilitate the collection of condensate, reducing maintenance costs; it can achieve the technical effects of meeting outdoor protection standards, reducing the risk of surface condensation on electrical components inside the enclosure, controlling the humidity inside the enclosure, and improving all-weather environmental adaptability.

[0080] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An electricity metering box, characterized in that, It includes a metering box (100), a box door (110), a control panel (120), and a heat dissipation unit (200); the metering box (100) is a hollow cuboid structure, and its internal hollow area forms an installation cavity; The metering box (100) has several heat dissipation holes 1 (140) and 2 (150) arranged in a matrix on its left and right side walls, respectively. The heat dissipation hole 1 (140) is located above the heat dissipation hole 2 (150). The heat dissipation unit (200) is set inside the mounting cavity to divide the inside of the mounting cavity into an upper space and a lower space, and to drive the gas flow inside the cavity for heat dissipation.

2. The electricity metering box according to claim 1, characterized in that, The door (110) is hinged to the front wall of the metering box (100) and is used to close or open the installation cavity; the inner sides of the left and right side walls of the metering box (100) are vertically provided with moving grooves (101) and sliding grooves (102); a number of electrical components (130) are fixed on the inner side of the rear side wall of the metering box (100); the control panel (120) is embedded and fixed on the upper outer side of the door (110) and has a humidity sensor integrated inside; temperature sensors are provided on the inner side of the control panel (120) and the inner side of the metering box (100).

3. An electricity metering box according to claim 2, characterized in that, The heat dissipation unit (200) includes a movable plate (210), a horizontal frame (220), a blower membrane (230), and a cover layer (260). Two movable plates (210) are provided, each with a rectangular plate structure. They are slidably connected to corresponding movable slots (101) in the left and right side walls of the metering box (100) via electric sliders (201). Several exhaust channels (211) are evenly provided inside the movable plates (210) along their length. The exhaust channels (211) are arranged vertically and include a vertical section and several inclined sections, with the openings of the inclined sections facing the upper space. The horizontal frame (220) is a rectangular frame structure, with its upper ends on the left and right sides fixedly connected to the two movable plates (210) respectively. The outer periphery of the horizontal frame (220) is sealed and slides on the inner wall of the metering box (100). Several through slots (221) are evenly provided on the upper surfaces of both sides of the horizontal frame (220). The through slots (221) correspond one-to-one with the vertical sections of the exhaust channels (211) and are connected to their interiors. The blower membrane (230) is made of flexible material, and its outer periphery is sealed and fixed inside the horizontal frame (220) and the horizontal frame (220) divides the installation cavity into upper and lower parts; the cover layer (260) is a cover structure made of flexible material, and there are two of them arranged in a mirror image. The upper ends of the two cover layers (260) are respectively fixed to the bottom of the left and right ends of the horizontal frame (220), and the lower ends of the two cover layers (260) are respectively fixed to the lower part of the left and right inner sidewalls of the metering box (100); the two cover layers (260) are slidably connected to the corresponding slide groove (102) on the side of the left and right inner sidewalls of the metering box (100) by a slider, and the cover layer (260) slides in a sealed manner along the slide groove (102).

4. An electricity metering box according to claim 3, characterized in that, The metering box (100) has storage frames (261) fixed on both the left and right inner walls. The cover (260) is pressed and stored in the storage frame (261) in the initial unexpanded state. The unfolded surface formed by the cover (260) after unfolding covers the inner side of the heat dissipation hole 2 (150) in the corresponding area.

5. An electricity metering box according to claim 3, characterized in that, The heat dissipation unit (200) also includes an electrically controlled magnetic block (240) and a circular plate (250); The electrically controlled magnetic block (240) is fixed at the center of the inner top wall of the metering box (100); the circular plate (250) is fixed in the middle of the blower membrane (230), is made of metal, and is on the same vertical line as the electrically controlled magnetic block (240) and is directly opposite to it; the blower membrane (230) and the circular plate (250) form a deformable top wall structure, and the circular plate (250) is attracted to move up and down by magnetic switching, thereby discharging the hot air in the upper space from the exhaust channel (211) through the through groove (221) and the cover layer (260) to the outside of the heat dissipation hole two (150).

6. An electricity metering box according to claim 5, characterized in that, The two cover layers (260) are provided with magnetic layers (262) on their opposite sides, and the two magnetic layers (262) have opposite magnetic properties. During the process of the moving plate (210) moving upward and causing the cover layers (260) to unfold, the two cover layers (260) unfold towards each other through the attraction of opposite poles of the magnetic layers (262), forming a drainage channel that wraps around the inside of the heat dissipation hole two (150). An auxiliary block (270) is fixed below the circular plate (250). The longitudinal section of the auxiliary block (270) is an inverted trapezoidal structure, and an electrically controlled magnetic plate (271) is embedded on both the left and right sides of its horizontal section. When the electrically controlled magnetic plate (271) is energized, the polarity of the side of the magnetic plate (271) closest to the cover layer (260) can be switched in a controllable manner. When the electrically controlled magnetic plates (271) on both sides are energized, they generate the same polarity as the magnetic layer (262) on the adjacent cover (260). Through the repulsion of like poles, the cover (260) is driven to tightly adhere to the inner wall of the metering box (100), thereby blocking the second heat dissipation hole (150). This prevents the circular plate (250) from generating negative pressure when it falls, causing the airflow to flow back from the second heat dissipation hole (150) to the upper space, thus achieving unidirectional heat dissipation.

7. An electricity metering box according to claim 6, characterized in that, The upper surface of the circular plate (250) is uniformly provided with a number of through semi-cylindrical holes (251) along its circumference. The holes (251) are covered with a sealing film (252). The sealing film (252) is a semi-circular elastic sheet with its straight side fixed to the upper surface of the circular plate (250). The lower surface of its arc-shaped side is provided with a magnetic layer, which is attracted to the upper surface of the circular plate (250) by magnetic attraction to seal the holes (251). The magnetic attraction between the sealing membrane (252) and the circular plate (250) is less than the air pressure difference generated when the blower membrane (230) moves downward, and the elastic restoring force of the blower membrane (230) is greater than the sum of the total weight of the auxiliary block (270), the electrically controlled magnetic plate (271), the circular plate (250) and the sealing membrane (252).

8. An electricity metering box according to claim 1, characterized in that, The bottom of the metering box (100) is provided with a suction pipe (280). The suction pipe (280) is arranged vertically, with its upper end connected to the lower space and its lower end extending to the outside of the metering box (100) and equipped with a one-way valve. The upper end of the suction pipe (280) is provided with a filter layer filled with desiccant.

9. An electricity metering box according to claim 5, characterized in that, The lower part of the left and right side walls of the metering box (100) is fixed with a replacement plate (160) in a detachable manner; the replacement plate (160) has an absorbent sponge (161) embedded in the side of the mounting cavity near the inner side. The absorbent sponge (161) is located between the cover (260) and the left and right side walls of the metering box (100) and is used to absorb the condensate flowing down from the exhaust duct (211) or the inner wall of the cover (260).

10. An electricity metering box according to claim 3, characterized in that, An opening membrane (212) is fixed at the air inlet of the exhaust duct (211); the opening membrane (212) is a valve structure and is made of a composite material of shape memory polymer and moisture-absorbing and expanding polymer; when the temperature inside the chamber rises, the shape memory polymer drives the opening membrane (212) to open due to heat; when the ambient humidity increases, the moisture-absorbing and expanding polymer absorbs water and expands, driving the opening membrane (212) to curl further and increase the opening degree.

Images