Adaptive sealing and heat dissipation electric energy metering box

Abstract

This invention relates to the field of electricity metering boxes, and discloses an adaptive sealed heat dissipation electricity metering box, including a chassis. The lower surface of the chassis is provided with an air inlet and an exhaust outlet. An air intake assembly and an air exhaust assembly are provided inside the chassis. The air intake assembly includes a filter housing and an air intake window provided at the air inlet. The air outlet end of the air intake window is connected to an air intake pipe. The end of the air intake pipe is connected to the inlet of the filter housing. A filter element is provided inside the filter housing. The outlet of the filter housing is connected to a connecting valve. The other end of the connecting valve is connected to an air intake fan. The air outlet end of the air intake fan is connected to a main pipe a. A solenoid valve is provided on the main pipe a. The end of the main pipe a is connected to a tapered pipe. The end of the tapered pipe is connected to a main pipe b. Several branch pipes a are connected to the outer surface of the main pipe b. The end of each branch pipe a is close to a respective electrical component. The air exhaust assembly includes an exhaust window provided at the exhaust outlet. The air inlet end of the exhaust window is connected to an exhaust pipe. The end of the exhaust pipe is connected to an exhaust fan.

Description

Technical Field

[0001] This invention relates to the field of electricity metering boxes, specifically to the field of heat dissipation in electricity metering boxes, and particularly to an adaptive sealed heat dissipation electricity metering box. Background Technology

[0002] As a key device in power systems for measuring electricity, the electricity metering box integrates precision electrical components such as electricity meters, instrument transformers, and circuit breakers. These components generate a significant amount of heat during long-term operation. If heat cannot be dissipated effectively and promptly, the equipment temperature will rise, affecting metering accuracy, accelerating insulation aging, and even causing safety accidents. Therefore, heat dissipation performance is one of the important indicators for evaluating the reliability of an electricity metering box.

[0003] The "adaptive sealing and heat dissipation power metering box" is an intelligent power device that solves the "contradiction between sealing and heat dissipation" in traditional metering boxes. Its metering box needs to achieve IP5X or 6X dustproof rating and IPX4 or X5 waterproof rating, but also needs to meet heat dissipation requirements.

[0004] In existing technologies, a common approach is to balance air pressure using a breathing valve and force cooling with a fan, where the fan's intake and exhaust paths are independent. A dust filter is installed at the air inlet to intercept dust from the incoming air. However, the filter is prone to clogging, and over time, dust accumulation increases intake resistance and reduces airflow, severely impacting cooling efficiency. Cleaning and replacing the filter requires regular manual maintenance, increasing operating costs and workload. Furthermore, using electrically controlled valves or baffles to control the opening and closing of the intake and exhaust ports presents problems such as response delays, complex control logic, and high failure rates. Moreover, dust can still enter the enclosure through gaps when the valve is not fully closed.

[0005] In addition, filter cleaning and heat dissipation activation are often done independently or manually, lacking an automated collaborative process. When the filter is heavily dusty, directly activating the heat dissipation function not only results in low heat dissipation efficiency but may also damage the filter due to a sudden increase in air pressure, thus accelerating dust accumulation inside the chamber.

[0006] Based on the above, the present invention proposes an adaptive sealed heat dissipation power metering box. Summary of the Invention

[0007] To address the problems mentioned in the background above, the present invention provides an adaptive sealed heat dissipation power metering box.

[0008] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows.

[0009] An adaptive sealed heat dissipation power metering box includes a chassis, an air inlet and an exhaust outlet on the lower surface of the chassis, and an air intake component and an air exhaust component inside the chassis. The air intake assembly includes a filter housing and an air intake window located at the air inlet. The air intake window is connected to an air intake pipe at its outlet end, and the end of the air intake pipe is connected to the inlet of the filter housing. The filter housing contains a ring-shaped filter element, with the inlet of the filter housing located outside the filter element and the outlet of the filter housing located inside the filter element. The outlet of the filter housing is connected to a connecting valve, and the other end of the connecting valve is connected to an air inlet fan. The outlet of the air inlet fan is connected to a main pipe a. A solenoid valve is installed on the main pipe a. The end of the main pipe a is connected to a tapered pipe. The diameter of the tapered pipe increases symmetrically from its axial midpoint to both ends. The end of the tapered pipe is connected to a main pipe b. Several branch pipes a are connected to the outer surface of the main pipe b. The end of each branch pipe a is close to a certain electrical component. The ventilation assembly includes a ventilation window located at the exhaust port, an exhaust duct connected to the air inlet end of the ventilation window, and an exhaust fan connected to the end of the exhaust duct.

[0010] Furthermore, the chassis is equipped with a mounting base made of thermally conductive material. One end of the mounting base is closed and the other end is open, with the open end connected to the inner wall of the chassis. The fins on the outer surface of the chassis are connected to the mounting base by a heat-conducting rod. The electrical components inside the chassis are mounted on the mounting base.

[0011] Furthermore, the closed end of the mounting base is provided with a connection hole and an annular area composed of four connected air guide plates. The housing of the electrical component is assembled in the annular area and there is a gap between it and the closed end of the mounting base. The connection hole communicates with the gap. The airflow flowing into the annular area through the connection hole is guided by the air guide plates and blown toward the outer surface of the electrical component. Pipe a is connected to the mounting base.

[0012] Furthermore, the connecting valve is configured to switch between filtration and backflushing states. In filtration state, the connecting valve connects the filter housing outlet to the air inlet of the blower, while in backflushing state, the connecting valve connects the air inlet of the blower to the chassis.

[0013] Furthermore, the connecting valve includes a valve body, a valve core sleeved inside the valve body, a valve shaft connected to the valve core, and a servo motor that drives the valve shaft to rotate. Two protruding tubes are arranged in an array along the circumference on the outer circular surface of the valve housing, and are respectively connected to the air inlet of the air blower and the outlet of the filter housing; A valve hole a is radially provided on the outer circular surface of the valve core, and a valve hole b is radially provided on the wall of the valve hole a. A side groove is provided on the outer circular surface of the valve core, and the center line of the side groove coincides with the center line of the valve hole b. An outer hole is provided on the end face of the valve body. When the connecting valve is in the filtering state, the two convex pipes are connected through valve hole a, the side groove is connected to the branch pipe b, and the orifice of valve hole b is blocked. After the valve shaft is rotated 90 degrees by the servo motor, the connecting valve switches to the backflush state. The filter shell outlet and the branch pipe b are connected through valve hole a and valve hole b. The side groove is connected to the air inlet of the air inlet fan and the side groove is connected to the outer hole.

[0014] Furthermore, a dust discharge pipe is connected to the end of the filter housing away from the air inlet fan. The end of the dust discharge pipe extends out of the casing and is equipped with a one-way valve d. The one-way valve d is used to allow the air in the dust discharge pipe to flow out to the outside in one direction.

[0015] Furthermore, the end of the air inlet pipe bends towards the dust exhaust pipe after passing through the filter housing inlet.

[0016] Furthermore, the air intake window includes a window housing disposed within the air intake; A vent is provided on the outward-facing side of the window shell. A blade is hinged inside the air inlet window. When the air inlet window is closed, the blade fits against the side of the window shell with the vent and blocks the vent. The window shell has an air vent and a nozzle on the inward side. The air vent is connected to the air inlet pipe. The end of the nozzle is connected to a connecting pipe b. The end of the connecting pipe b is connected to the air inlet pipe and a one-way valve b is installed at the connection. The cone pipe and the connecting pipe b are connected by a connecting pipe c. A one-way valve c is installed on the connecting pipe c. The one-way valve b is used to allow the air in the connecting pipe b to flow into the air inlet pipe in one direction. The one-way valve c is used to allow the air in the connecting pipe c to flow into the cone pipe in one direction. A vertical rod is installed inside the window housing. The extension direction of the vertical rod is perpendicular to the hinge axis formed at the hinge installation point of the blade. There are two vertical rods, which are located on both sides of the blade respectively. The two vertical rods are connected by a horizontal rod. A spring b is installed between the vertical rod and the window shell; A support extends from the outer surface of the hinge shaft formed at the blade hinge installation point. A pin hole is provided on the support, and a protruding pin is provided on the vertical rod. The protruding pin slides in the pin hole. The guiding direction of the pin hole is perpendicular to the hinge shaft and perpendicular to the extension direction of the vertical rod. When the hinge shaft deflects the blade to open the vent and the air inlet window switches to the open state, the vertical rod is driven to move through the cooperation of the pin hole and the protruding pin, and the spring b is compressed. A cylindrical shell is also installed inside the window housing. The open end of the cylindrical shell is connected to the inward side of the window housing and the cylindrical shell is connected to the connector. A piston is installed inside the cylindrical shell. A spring a is installed on the side of the piston facing the connector. A plug rod is installed on the side of the piston away from the connector. The end of the plug rod extends out of the cylindrical shell. A socket is installed on the side of the crossbar facing the cylindrical shell. When the air inlet window is closed, the end of the plug rod is inserted into the socket.

[0017] Furthermore, the structure of the exhaust window is the same as that of the air inlet window, with the ventilation opening of the exhaust window located on the inward side of the window shell and the inlet and air hole located on the outward side of the window shell. The vent of the exhaust window is connected to the exhaust pipe. The inlet of the exhaust window is connected to the connecting pipe b through the connecting pipe a. The connecting pipe a is equipped with a one-way valve a, which is used to allow the air in the connecting pipe a to flow into the connecting pipe b in one direction.

[0018] Compared with the prior art, the beneficial effects of this invention are as follows: Technical effect 1: In this case, before each heat dissipation, the system switches to the back-blowing mode for a few seconds, back-blowing for 2-3 seconds, and then switches back to the heat dissipation mode. This ensures that the filter can effectively intercept dust in the heat dissipation mode. In the heat dissipation mode, the intake fan starts at a higher power, which opens the air intake channel composed of components such as the air intake window and the exhaust channel composed of components such as the exhaust window. Air is drawn in through the air intake channel and filtered, and exhaust is discharged through the exhaust channel. This in-and-out process can achieve efficient dust-free heat dissipation. Technical Effect 2: In this case, the intake fan starts at a high power, which is the only way to trigger the opening of the intake and exhaust windows. This opening method ensures that the airflow is continuously flowing in one direction from the intake channel to the exhaust channel. The intake channel uses a filter to intercept dust, while the exhaust channel uses continuously flowing air to prevent dust from entering the chassis. In other words, this case can avoid the possibility of dust entering the chassis through the intake / exhaust channels due to external force opening the intake / exhaust channels, thus ensuring a dust-free environment inside the chassis. Technical Effect 3: In this case, the advantage of setting one-way valves on multiple connecting pipes is that the opening and closing of the air intake / exhaust channels is based on the suction of airflow, which makes it flow in one direction. The airflow flows in one direction from the air intake channel to the exhaust channel, which is the opening, and the reverse is the closing. In other words, once the unidirectional airflow that plays a role in heat dissipation stops, the air intake / exhaust channel will immediately and timely close, ensuring the protective effect of stopping heat dissipation and closing the air intake / exhaust channel immediately. There is no electrical control delay, which solves the problem of dust entering the chassis through the time gap between stopping and opening. Technical effect 4: In this case, by installing a total temperature sensor inside the chassis, the intake fan is activated when the temperature inside the chassis exceeds the set value, and the dust removal and heat dissipation work begins. When the temperature is lower than the set value, the intake fan is turned off and the air intake / exhaust passage is automatically closed. In this case, by setting temperature sensors at each electrical component, the opening of the regulating valve on the corresponding branch is controlled. That is, if the temperature at a certain electrical component is higher, then more heat is generated, and the opening of the corresponding regulating valve is increased accordingly to achieve the effect of targeted heat dissipation. In this case, the heat dissipation airflow is guided by the inclined air guide plates and blown toward the outer surface of the electrical components, which can further improve the heat dissipation effect. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ; Figure 3 This is a cross-sectional view of the present invention; Figure 4 This is a schematic diagram of the air intake and exhaust components; Figure 5 Schematic diagram of the air intake window Figure 1 ; Figure 6 Schematic diagram of the air intake window Figure 2 ; Figure 7 This is a schematic diagram of the interior of the air intake window when it is closed. Figure 8 This is a schematic diagram of the interior of the air intake window when it is open. Figure 9 A cross-sectional view of the air intake assembly during heat dissipation; Figure 10 This is a cross-sectional view of the air intake assembly during backflushing.

[0020] The labels in the attached diagram are: 100. Chassis; 101. Air Inlet; 102. Exhaust Port; 103. Breathing Valve; 104. Mounting Base; 1041. Connecting Hole; 1042. Air Guide Plate; 105. Fin; 106. Electrical Components; 107. Breathing Hole; 200. Air Inlet Assembly; 201. Air Inlet Window; 202. Connecting Pipe b; 203. One-Way Valve b; 204. Connecting Pipe c; 205. One-Way Valve c; 206. Air Inlet Pipe; 207. Filter Housing; 2071. Filter Element; 2072. Heating Element; 208. Connecting Valve; 2081. Valve Housing; 2082. Outer Hole; 2083. Valve Core; 2084. Valve Hole a; 2085. Valve Hole b; 2086. Side Groove; 20 9. Air intake fan; 210. Main pipe a; 211. Solenoid valve; 212. Conical pipe; 213. Main pipe b; 214. Branch pipe a; 215. Branch pipe b; 216. Dust exhaust pipe; 217. One-way valve d; 218. Window housing; 219. Blade; 220. Air vent; 221. Connector; 222. Cylinder housing; 223. Piston; 224. Spring a; 225. Insert rod; 226. Horizontal bar; 227. Vertical bar; 228. Protruding pin; 229. Spring b; 230. Support; 231. Pin hole; 232. Insertion hole; 300. Exhaust assembly; 301. Exhaust window; 302. Exhaust fan; 303. Exhaust duct; 304. Connecting pipe a; 305. One-way valve a. Detailed Implementation

[0021] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0022] Reference Figures 1-3 An adaptive sealed heat dissipation power metering box includes a chassis 100. The lower surface of the chassis 100 is provided with an air inlet 101, an exhaust outlet 102, and a vent 107. The chassis 100 is provided with an air intake assembly 200, an exhaust assembly 300, a mounting base 104, and electrical components 106.

[0023] One end of the mounting base 104 is closed, and the other end is open, with the open end connected to the inner wall of the chassis 100. The fins 105 on the outer surface of the chassis 100 are connected to the mounting base 104 by a heat-conducting rod made of thermally conductive material. The mounting base 104 is also made of thermally conductive material. The electrical component 106 is mounted on the mounting base 104. Under normal circumstances, the heat generated by the electrical component 106 during low-power operation is conducted to the outside through the cooperation of the mounting base 104, the heat-conducting rod, and the fins 105. The heat dissipation structure composed of the air intake assembly 200 and the air exhaust assembly 300 is activated when the temperature of the internal environment of the chassis 100 is higher than the set value.

[0024] Furthermore, a temperature sensor is installed inside the chassis 100 to monitor the temperature. When the temperature is detected to be higher than the set value, a signal is sent to activate the heat dissipation structure. The signal transmission is achievable with existing technology and will not be described in detail.

[0025] Furthermore, the closed end of the mounting base 104 is provided with a connection hole 1041 and an annular area composed of four air guide plates 1042 connected together. The housing of the electrical component 106 is assembled in the annular area, the connection hole 1041 communicates with the annular area, and the air outlet end of the air inlet assembly 200 is connected to the mounting base 104. The airflow flowing into the annular area through the connection hole 1041 is guided by the air guide plates 1042 and blown toward the outer surface of the electrical component 106, so that the air comes into close contact with the electrical component 106 and the heat dissipation effect is improved.

[0026] The annular area and the connection hole 1041 are provided in multiple quantities corresponding to the number of electrical components 106.

[0027] Furthermore, a breather valve 103 is provided at the breather hole 107. The breather valve 103 is used to balance the pressure inside and outside the chassis 100. This is feasible with existing technology and will not be described in detail.

[0028] Reference Figure 4 The air intake assembly 200 includes a filter housing 207 and an air intake window 201 disposed at the air intake 101. The air intake window 201 is configured to switch between an open state and a closed state.

[0029] An air inlet pipe 206 is connected to the air outlet end of the air inlet window 201. The end of the air inlet pipe 206 is connected to the inlet of the filter housing 207. A filter element 2071 is installed inside the filter housing 207. The filter element 2071 is in the shape of an annular ring. The inlet of the filter housing 207 is outside the filter element 2071, and the outlet of the filter housing 207 is inside the filter element 2071.

[0030] The outlet of the filter housing 207 is connected to a connecting valve 208. The other end of the connecting valve 208 is connected to an air inlet fan 209. The outlet of the air inlet fan 209 is connected to a main pipe a210. A solenoid valve 211 is installed on the main pipe a210. The end of the main pipe a210 is connected to a tapered pipe 212. The diameter of the tapered pipe 212 increases symmetrically from its axial midpoint to both ends. The end of the tapered pipe 212 is connected to a main pipe b213. Several branch pipes a214 are connected to the outer surface of the main pipe b213. The ends of the branch pipes a214 are connected to the mounting base 104, and the ends of each branch pipe a214 are close to each electrical component 106.

[0031] When the air intake fan 209 is started, the air intake window 201 is opened. Outside air enters the filter housing 207 through the air intake window 201 and the air intake pipe 206 in sequence. After being filtered by the filter element 2071, it enters the mounting base 104 through the connecting valve 208, the main pipe a210, the cone pipe 212, the main pipe b213, and the branch pipe a214 in sequence. Then, it flows into the annular area through the connecting hole 1041 and the gap between the electrical component 106 and the closed end of the mounting base 104. Under the guidance of the air guide plate 1042, it is blown towards the outer surface of the electrical component 106 to achieve heat dissipation of the electrical component 106. At the same time, the hot air inside the chassis 100 is exhausted by the exhaust assembly 300.

[0032] Furthermore, each branch pipe a214 is equipped with a regulating valve, and each electrical component 106 is equipped with a temperature sensor. If the temperature at a certain electrical component 106 is higher, then more heat is generated, and the opening of the corresponding regulating valve is adjusted accordingly to achieve a targeted heat dissipation effect.

[0033] Furthermore, the 2071 filter element is integrated, for example, consisting of an activated carbon layer and a filter mesh layer from the outside in, which can not only filter dust but also dehumidify.

[0034] In a preferred embodiment, the connecting valve 208 is configured to switch between a filtering state and a backflushing state. Its technical advantage is that it can not only filter the cold air used for heat dissipation, but also achieve a self-cleaning function.

[0035] Specifically, refer to Figure 9 and Figure 10 The connecting valve 208 includes a valve housing 2081, a valve core 2083 sleeved in the valve housing 2081, a valve shaft connected to the valve core 2083, and a servo motor for driving the valve shaft to rotate.

[0036] Two protruding tubes are arranged in an array along the circumference on the outer circular surface of the valve housing 2081, and are respectively connected to the air inlet of the air inlet fan 209 and the outlet of the filter housing 207.

[0037] A valve hole a2084 is provided radially through the outer circular surface of the valve core 2083, and a valve hole b2085 is provided radially through the wall of the valve hole a2084.

[0038] The outer circular surface of the valve core 2083 is also provided with a side groove 2086, the center line of which coincides with the center line of the valve hole b2085.

[0039] The end face of the valve body 2081 is provided with an external hole 2082.

[0040] When the connecting valve 208 is in the filtering state, such as Figure 9As shown, the two convex pipes are connected through valve hole a2084, and the side groove 2086 is connected to the branch pipe b215. The opening of valve hole b2085 is blocked. At this time, the solenoid valve 211 is opened, and the air filtered by the filter element 2071 flows through valve hole a2084 to the main pipe a210, and finally flows into the mounting base 104 to achieve the purpose of heat dissipation. The valve shaft is rotated 90 degrees by a servo motor. Figure 9 For example, rotating the valve 208 counterclockwise by 90 degrees will switch it to the backflush state. Figure 10 As shown, at this time, the outlet of the filter housing 207 and the branch pipe b215 are connected through valve holes a2084 and b2085. The side groove 2086 is connected to the air inlet of the blower 209 and also to the outer hole 2082. At the same time, the solenoid valve 211 is closed, and the blower 209 operates at a lower power. It will draw air from the casing 100 through the outer hole 2082 and the side groove 2086, and then flow into the outlet of the filter housing 207 through the main pipe a210, branch pipe b215, valve holes a2084 and b2085, thus achieving backflushing of the filter element 2071.

[0041] Furthermore, the end of the filter housing 207 away from the air inlet fan 209 is connected to a dust discharge pipe 216. The end of the dust discharge pipe 216 extends out of the housing 100 and is equipped with a one-way valve d217. The one-way valve d217 is used to allow the air in the dust discharge pipe 216 to flow out to the outside in one direction. The mixture of air and dust after the filter element 2071 is back-blown cleaned will blow the one-way valve d217 open and discharge it through the end of the dust discharge pipe 216.

[0042] It is important to note that the backflushing cleaning time should only be a few seconds, such as 2-3 seconds, before switching to cooling mode. This is to prevent the internal environment of the chassis from being under continuous negative pressure, which could easily allow external dust to enter the chassis through gaps over time. On the other hand, performing a short backflushing cleaning before each cooling cycle ensures that the filter element 2071 is clean and maximizes its effectiveness in intercepting dust.

[0043] Furthermore, the end of the air inlet duct 206 bends towards the dust exhaust duct 216 after passing through the inlet of the filter housing 207. Its technical advantage lies in... Figure 9 As shown, this makes it difficult for the mixed gas formed by backflushing to enter the air inlet pipe 206.

[0044] Furthermore, refer to Figure 9 The filter element 2071 is equipped with a heating element 2072, which can use existing electric heating technology. Its technical advantage is that the heating element 2072 is activated at the same time during backflushing, which can heat the filter element 2071 and discharge the adsorbed moisture.

[0045] Reference Figure 4The exhaust assembly 300 includes an exhaust window 301 located at the exhaust port 102. The exhaust window 301 is also configured to switch between an open and closed state. An exhaust pipe 303 is connected to the air inlet end of the exhaust window 301, and an exhaust fan 302 is connected to the end of the exhaust pipe 303. When the air inlet assembly 200 draws outside air into the chassis 100, the exhaust window 301 switches to the open state, the exhaust fan 302 runs, and draws hot air from inside the chassis 100 out through the exhaust window 301. This in-and-out process achieves the purpose of heat dissipation.

[0046] Specifically, refer to Figures 5-8 The air inlet window 201 includes a window shell 218 disposed within the air inlet 101.

[0047] A ventilation opening is provided on the outward side of the window shell 218, and a blade 219 is hinged inside the air inlet window 201. When the air inlet window 201 is closed, the blade 219 fits against the side of the window shell 218 where the ventilation opening is provided, thereby blocking the ventilation opening.

[0048] A vent 220 and a nozzle 221 are provided on the inward side of the window housing 218. The vent 220 is connected to the air inlet pipe 206. The end of the nozzle 221 is connected to a connecting pipe b202. The end of the connecting pipe b202 is connected to the air inlet pipe 206, and a one-way valve b203 is provided at the connection. The cone pipe 212 and the connecting pipe b202 are connected by a connecting pipe c204, and a one-way valve c205 is provided on the connecting pipe c204. The one-way valve b203 is used to allow the air in the connecting pipe b202 to flow into the air inlet pipe 206 in one direction, and the one-way valve c205 is used to allow the air in the connecting pipe c204 to flow into the cone pipe 212 in one direction.

[0049] A vertical rod 227 is installed inside the window shell 218. The extension direction of the vertical rod 227 is perpendicular to the hinge axis formed at the hinge installation point of the blade 219. Preferably, there are two vertical rods 227, which are located on both sides of the blade 219 respectively. The two vertical rods 227 are connected by a crossbar 226.

[0050] A spring b229 is installed between the vertical rod 227 and the window shell 218.

[0051] A support 230 extends from the outer surface of the hinge shaft formed at the hinge mounting point of blade 219. A pin hole 231 is provided on the support 230, and a protruding pin 228 is provided on the vertical rod 227. The protruding pin 228 slides within the pin hole 231. The guiding direction of the pin hole 231 is perpendicular to the hinge shaft and perpendicular to the extension direction of the vertical rod 227. When the hinge shaft deflects the blade 219 to open the vent and the air inlet window 201 switches to the open state, the vertical rod 227 is driven to move through the cooperation of the pin hole 231 and the protruding pin 228, and the spring b229 is compressed.

[0052] A cylindrical shell 222 is also installed inside the window shell 218. The open end of the cylindrical shell 222 is connected to the inward side of the window shell 218 and the cylindrical shell 222 is connected to the connector 221. A piston 223 is installed inside the cylindrical shell 222. A spring a224 is provided on the side of the piston 223 facing the connector 221. A plug rod 225 is provided on the side of the piston 223 away from the connector 221. The end of the plug rod 225 extends out of the cylindrical shell 222. A socket 232 is provided on the side of the crossbar 226 facing the cylindrical shell 222. When the air inlet window 201 is closed, the end of the plug rod 225 is inserted into the socket 232.

[0053] Specifically, refer to Figure 4 The structure of the air inlet window 201 is the same as that of the air outlet window 301, except that they face opposite directions. That is, the ventilation opening of the air outlet window 301 is located on the side of the window shell facing inward, and the inlet and air hole are located on the side of the window shell facing outward.

[0054] The air vent of the exhaust window 301 is connected to the exhaust pipe 303. The inlet of the exhaust window 301 is connected to the connecting pipe b202 through the connecting pipe a304. A one-way valve a305 is provided on the connecting pipe a304. The one-way valve a305 is used to allow the air in the connecting pipe a304 to flow into the connecting pipe b202 in one direction.

[0055] Working principle of the invention: Step 1: Initially, both the air inlet and exhaust windows are closed; When the connecting valve is switched to the backflush state, the solenoid valve is closed, and the air intake fan starts at a low power. It draws air from the casing through the outer hole and side groove, and then flows into the filter shell outlet through the main pipe a, branch pipe b, valve hole a, and valve hole b to achieve backflush of the filter element. The backflush airflow can blow the one-way valve d to open it, and the dust and backflush airflow are discharged through the end of the dust exhaust pipe. The dust removal time is only a few seconds, such as 2-3 seconds. Its technological advantage lies in: Before each cooling cycle, switch to back-blowing mode for a few seconds, back-blowing for 2-3 seconds, and then switch back to cooling mode. This ensures that the filter can effectively intercept dust in cooling mode. In cooling mode, the intake fan starts at a higher power, opening the air intake channel composed of components such as the air intake window and the exhaust channel composed of components such as the exhaust window. Air is drawn in through the air intake channel and filtered, and exhaust is discharged through the exhaust channel. This in-and-out process achieves efficient dust-free cooling. Step 2: Pause the air intake fan, switch the connecting valve to the filter state, and open the solenoid valve; When the intake fan starts at high power, it draws air from the intake pipe and connecting pipe b: First, the piston is pushed back through the connecting pipe b, the insertion rod leaves the insertion hole, and the valve is unlocked. Then, under negative pressure, the blades deflect, the vent of the intake window opens, and the outside air enters the filter housing 207 through the vent of the intake window, the air hole, and the intake pipe 206. After being filtered by the filter element 2071, it enters the mounting base 104 through the valve hole a2084, the main pipe a210, the cone pipe 212, the main pipe b213, and the branch pipe a214. Then, it flows into the annular area through the connecting hole 1041 and the gap between the electrical component 106 and the closed end of the mounting base 104. Under the guidance of the air guide plate 1042, it is blown towards the outer surface of the electrical component 106 to dissipate heat from the electrical component 106. At the same time, while drawing air from the connecting pipe b, it also draws air from the connecting pipe a. Similarly, it can open the exhaust window, start the exhaust fan, and expel the hot air from the casing. The inlet and outlet achieve the purpose of heat dissipation. Its technological advantages lie in: In this case, the intake fan starts at a high power, which is the only way to trigger the opening of the intake and exhaust windows. This opening method ensures that the airflow is a continuous unidirectional flow from the intake channel to the exhaust channel. The intake channel uses a filter to intercept dust, while the exhaust channel uses continuously flowing air to prevent dust from entering the chassis. In other words, this case can prevent the possibility of dust entering the chassis through the intake / exhaust channels due to external force, thus ensuring a dust-free environment inside the chassis.

[0056] In addition, the technical advantages of using check valves on multiple connecting pipes are: Since the opening and closing of the intake / exhaust channels are based on the suction of airflow, making it flow in one direction, the airflow flows unidirectionally from the intake channel to the exhaust channel, which means it is open, and vice versa. In other words, once the unidirectional airflow that plays a role in heat dissipation stops, the intake / exhaust channels will immediately and promptly close, ensuring the protective effect of stopping heat dissipation and closing the intake / exhaust channels immediately. There is no electronic control delay, which solves the problem of dust entering the chassis through the time gap between stopping and opening.

[0057] besides: In this case, by installing a total temperature sensor inside the chassis, the intake fan is started when the temperature inside the chassis exceeds the set value, and the dust removal and heat dissipation work begins. When the temperature is lower than the set value, the intake fan is turned off and the air intake / exhaust passage is automatically closed. In this case, by setting temperature sensors at each electrical component, the opening of the regulating valve on the corresponding branch is controlled. That is, if the temperature at a certain electrical component is higher, then more heat is generated, and the opening of the corresponding regulating valve is increased accordingly to achieve the effect of targeted heat dissipation. In this case, the heat dissipation airflow is guided by the inclined air guide plates and blown toward the outer surface of the electrical components, which can further improve the heat dissipation effect.

[0058] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An electric energy metering box with adaptive sealing and heat dissipation, comprising a cabinet (100), the lower surface of the cabinet (100) is provided with an air inlet (101) and an air outlet (102), characterized in that, The chassis (100) is equipped with an air intake assembly (200) and an exhaust assembly (300). The air inlet assembly (200) includes a filter housing (207) and an air inlet window (201) provided at the air inlet (101). The air outlet end of the air inlet window (201) is connected to an air inlet pipe (206). The end of the air inlet pipe (206) is connected to the inlet of the filter housing (207). The filter housing (207) is provided with a ring-shaped filter element (2071). The inlet of the filter housing (207) is outside the filter element (2071), and the outlet of the filter housing (207) is inside the filter element (2071). The outlet of the filter housing (207) is connected to a connecting valve (208), the other end of the connecting valve (208) is connected to an air inlet fan (209), the outlet of the air inlet fan (209) is connected to a main pipe a (210), a solenoid valve (211) is installed on the main pipe a (210), the end of the main pipe a (210) is connected to a tapered pipe (212), the end of the tapered pipe (212) is connected to a main pipe b (213), the outer surface of the main pipe b (213) is connected to several branch pipes a (214), and the end of each branch pipe a (214) is close to each electrical component (106). The exhaust assembly (300) includes an exhaust window (301) disposed at the exhaust port (102), an exhaust pipe (303) is connected to the air inlet end of the exhaust window (301), and an exhaust fan (302) is connected to the end of the exhaust pipe (303). The connecting valve (208) is configured to switch between the filtering state and the backflushing state. The connecting valve (208) in the filtering state is used to connect the outlet of the filter housing (207) and the air inlet of the blower (209). The connecting valve (208) in the backflushing state is used to connect the air inlet of the blower (209) and the casing (100). The connecting valve (208) includes a valve body (2081), a valve core (2083) sleeved in the valve body (2081), a valve shaft connected to the valve core (2083), and a servo motor that drives the valve shaft to rotate; Two protruding tubes are arranged in an array along the circumferential direction on the outer circular surface of the valve housing (2081), and are respectively connected to the air inlet of the air inlet fan (209) and the outlet of the filter housing (207); A valve hole a (2084) is radially provided on the outer circular surface of the valve core (2083). A valve hole b (2085) is radially provided on the wall of the valve hole a (2084). A side groove (2086) is provided on the outer circular surface of the valve core (2083). The center line of the side groove (2086) coincides with the center line of the valve hole b (2085). An outer hole (2082) is provided on the end face of the valve body (2081). When the connecting valve (208) is in the filtering state, the two convex pipes are connected through valve hole a (2084), the side groove (2086) is connected to the branch pipe b (215), the orifice of valve hole b (2085) is blocked, and after the valve shaft is rotated 90 degrees by the servo motor, the connecting valve (208) switches to the backflush state. The outlet of the filter shell (207) and the branch pipe b (215) are connected through valve hole a (2084) and valve hole b (2085), the side groove (2086) is connected to the air inlet end of the air inlet fan (209), and the side groove (2086) is connected to the outer hole (2082).

2. The electric energy metering box of claim 1, wherein, The chassis (100) is provided with a mounting base (104) made of thermally conductive material. One end of the mounting base (104) is closed and the other end is open, with the open end connected to the inner wall of the chassis (100). The fins (105) on the outer surface of the chassis (100) are connected to the mounting base (104) by a heat-conducting rod. The electrical components (106) inside the chassis (100) are mounted on the mounting base (104).

3. The self-adapting sealed and radiating electric energy metering box according to claim 1, characterized in that, The closed end of the mounting base (104) is provided with a connection hole (1041) and an annular area composed of four air guide plates (1042). The housing of the electrical component (106) is assembled in the annular area and there is a gap between it and the closed end of the mounting base (104). The connection hole (1041) communicates with the gap. The airflow flowing into the annular area through the connection hole (1041) is guided by the air guide plate (1042) and blown toward the outer surface of the electrical component (106). The branch pipe a (214) is connected to the mounting base (104).

4. The self-adapting sealed and radiating electric energy metering box according to claim 1, characterized in that, The end of the filter housing (207) away from the air inlet fan (209) is connected to a dust discharge pipe (216). The end of the dust discharge pipe (216) extends out of the casing (100) and is equipped with a one-way valve d (217). The one-way valve d (217) is used to allow the air in the dust discharge pipe (216) to flow out to the outside in one direction.

5. The self-sealing and self-cooling electric energy metering box according to claim 1, characterized in that, The air inlet window (201) includes a window shell (218) disposed within the air inlet (101); A ventilation opening is provided on the outward side of the window shell (218), and a blade (219) is hinged inside the air inlet window (201). When the air inlet window (201) is closed, the blade (219) is attached to the side of the window shell (218) where the ventilation opening is provided, and the ventilation opening is blocked. A vent (220) and a nozzle (221) are provided on the inward side of the window shell (218). The vent (220) is connected to the air inlet pipe (206). The end of the nozzle (221) is connected to a connecting pipe b (202). The end of the connecting pipe b (202) is connected to the air inlet pipe (206), and a one-way valve b (203) is provided at the connection. The cone pipe (212) and the connecting pipe b (202) are connected by a connecting pipe c (204), and a one-way valve c (205) is provided on the connecting pipe c (204). The one-way valve b (203) is used to allow the air in the connecting pipe b (202) to flow into the air inlet pipe (206) in one direction, and the one-way valve c (205) is used to allow the air in the connecting pipe c (204) to flow into the cone pipe (212) in one direction. A vertical rod (227) is installed inside the window shell (218). The extension direction of the vertical rod (227) is perpendicular to the hinge axis formed at the hinge installation point of the blade (219). There are two vertical rods (227) and they are located on both sides of the blade (219). The two vertical rods (227) are connected by a horizontal rod (226). A spring b (229) is provided between the vertical rod (227) and the window shell (218); A support (230) extends from the outer surface of the hinge shaft formed at the hinge mounting point of the blade (219). A pin hole (231) is provided on the support (230), and a protruding pin (228) is provided on the vertical rod (227). The protruding pin (228) slides in the pin hole (231). The guiding direction of the pin hole (231) is perpendicular to the hinge shaft and perpendicular to the extension direction of the vertical rod (227). When the hinge shaft deflects the blade (219) and opens the vent, and the air inlet window (201) switches to the open state, the vertical rod (227) is driven to move through the cooperation of the pin hole (231) and the protruding pin (228), and the spring b (229) is compressed.

6. The self-adapting sealed and radiating electric energy metering box according to claim 5, characterized in that, A cylindrical shell (222) is installed inside the window shell (218). The open end of the cylindrical shell (222) is connected to the inward side of the window shell (218) and the cylindrical shell (222) is connected to the connector (221). A piston (223) is fitted inside the cylindrical shell (222). A spring a (224) is provided on the side of the piston (223) facing the connector (221). A plug rod (225) is provided on the side of the piston (223) away from the connector (221). The end of the plug rod (225) extends out of the cylindrical shell (222). A socket (232) is provided on the side of the crossbar (226) facing the cylindrical shell (222). When the air inlet window (201) is closed, the end of the plug rod (225) is inserted into the socket (232).

7. The adaptive sealed heat dissipation power metering box according to claim 6, characterized in that, The structure of the exhaust window (301) is the same as that of the air inlet window (201). The ventilation opening of the exhaust window (301) is located on the side of the window shell facing inward, and the inlet and air hole are located on the side of the window shell facing outward. The air hole of the exhaust window (301) is connected to the exhaust pipe (303). The inlet of the exhaust window (301) is connected to the connecting pipe b (202) through the connecting pipe a (304). A one-way valve a (305) is provided on the connecting pipe a (304). The one-way valve a (305) is used to allow the air in the connecting pipe a (304) to flow into the connecting pipe b (202) in one direction.

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