Energy-saving electrical equipment control cabinet

Abstract

This invention provides an energy-saving electrical equipment control cabinet, belonging to the field of electrical control cabinet cooling technology. The invention includes a cabinet body, and further includes: a circulating cooling component, a triggered cooling component, and an electromagnetic reset component; a temperature sensor monitors the cabinet temperature in real time, working in conjunction with a circulating fan and an exhaust fan to achieve energy-saving heat dissipation control; high thermal conductivity particles ensure high thermal conductivity under different operating conditions, allowing heat transfer even when ambient temperature or airflow changes, ensuring effective heat dissipation; the triggered cooling component controls liquid nitrogen release based on the cabinet temperature, automatically triggering liquid nitrogen cooling when the temperature rises to a certain level and automatically stopping when the temperature drops, avoiding excessive use of liquid nitrogen and achieving the expected heat dissipation effect even at high ambient temperatures; spiral blades promote thorough mixing of liquid nitrogen and air, while also promoting gas-liquid separation, providing a stable low-temperature operating environment for electrical equipment and reducing damage to the equipment caused by excessive temperature and humidity.

Description

Technical Field

[0001] This invention relates to the field of electrical control cabinet cooling technology, and more specifically, to an energy-saving electrical equipment control cabinet. Background Technology

[0002] An electrical equipment control cabinet is a device used for centralized management and control of various electrical equipment. It typically consists of one or more electrical control components, switches, instruments, and terminal blocks, used to connect and control electrical equipment and power systems. Control cabinets are commonly installed in industrial production sites, power stations, buildings, computer rooms, etc., to monitor and control various electrical equipment, including motors, generators, sensors, instruments, transformers, and automation equipment. Electrical equipment control cabinets have functions such as circuit protection, power distribution, control logic, fault diagnosis, and communication to ensure the safe operation and efficient control of electrical equipment.

[0003] In existing electrical control cabinet cooling technologies, fans are generally used to accelerate airflow. In this mode, heat exchange between hot air and the external environment mainly relies on natural convection and forced convection by fans. The heat exchange efficiency is relatively limited. More importantly, the cooling effect of fans is highly dependent on external factors such as ambient temperature and airflow resistance. Once the external environment changes, the cooling effect is likely to fluctuate drastically. When the ambient temperature rises, the temperature of the air blown out by the fan also rises, which greatly reduces the temperature difference between the hot air and the outside air. At this time, even if the fan runs at full speed, the cooling rate of the hot air will decrease significantly. For example, in the hot summer, when the outdoor temperature is as high as 35°C or even higher, the cooling effect of the fans in the electrical control cabinet will be greatly reduced compared to cooler weather because the air temperature is higher. This can cause the equipment in the electrical control cabinet to malfunction due to overheating.

[0004] How to invent an energy-saving electrical equipment control cabinet to solve these problems has become an urgent issue for those skilled in the art. Summary of the Invention

[0005] To overcome the above deficiencies, the present invention provides an energy-saving electrical equipment control cabinet, which aims to solve the problems mentioned in the background.

[0006] This invention is implemented as follows:

[0007] This invention provides an energy-saving electrical equipment control cabinet, including a cabinet body. The side walls of the cabinet body are provided with ventilation slots and rain shelters. The rain shelters are fixedly installed on the outside of the ventilation slots. A temperature sensor is installed on the top of the cabinet body, with the probe of the temperature sensor extending into the cabinet body. A circulation fan and an exhaust fan are installed on the side wall of the cabinet body near the top of the cabinet body. The cabinet also includes:

[0008] Circulating cooling assembly: The circulating cooling assembly is installed on the top and inside of the cabinet;

[0009] Triggered cooling component: The triggered cooling component is disposed inside the circulating cooling component;

[0010] Electromagnetic reset assembly: The electromagnetic reset assembly is located inside the circulating cooling assembly.

[0011] Preferably, the temperature sensor is electrically connected to the circulating fan and the exhaust fan, and the value monitored by the temperature sensor is positively correlated with the rotational speed of the circulating fan and the exhaust fan.

[0012] Preferably, two brackets are fixedly installed on the inner side wall of the cabinet corresponding to the rain shelter. The two brackets are symmetrically distributed, and a dustproof net is movably connected between the two brackets. The dustproof net can cover all the ventilation slots, and there is a gap between the top of the dustproof net and the bottom of the circulation fan and the exhaust fan.

[0013] Preferably, the circulating cooling assembly includes an air guide duct, a connecting pipe, a mounting base, and an exhaust pipe. The mounting base is fixed to the top of the cabinet, and a mounting box is fixedly installed on the mounting base. The mounting box has an air inlet chamber and a liquid nitrogen storage chamber inside. The air guide duct is fixedly installed on the outer wall of the cabinet and faces the circulating fan. One end of the connecting pipe is connected to the air guide duct, and the other end is connected to the left side of the air inlet chamber. An exhaust pipe is connected through the side of the air inlet chamber away from the connecting pipe. The lower end of the exhaust pipe penetrates the top wall of the cabinet and extends into the interior of the cabinet.

[0014] Preferably, a filter plate is slidably connected inside the air inlet chamber located at the bottom of the liquid nitrogen storage chamber. The filter plate is elastically connected to the left inner wall of the mounting box by a spring. The filter plate is provided with several heat exchange channels. Several heat-conducting rods are fixedly connected to the side wall of the filter plate near the spring. The ends of the heat-conducting rods penetrate the left side wall of the mounting box and extend to the outside of the mounting box. A baffle plate is fixedly installed inside the exhaust pipe near the mounting box. The filter plate is a magnetic lightweight plate.

[0015] Preferably, the surfaces of the filter plate and the heat-conducting rod, as well as the heat exchange channel, are provided with highly thermally conductive particles, and there is a gap between the baffle plate and the top of the inner wall of the exhaust pipe.

[0016] Preferably, the trigger cooling component includes a trapezoidal platform, spiral blades, a limiting plate, a bending spring, a movable baffle, and a liquid guide port opened on the bottom wall of the liquid nitrogen storage chamber. The spiral blades are fixedly installed inside the air inlet chamber and located on the right side of the liquid nitrogen storage chamber. The liquid nitrogen storage chamber is filled with liquid nitrogen. The limiting plate is fixed on the inner bottom wall of the liquid nitrogen storage chamber. The liquid guide port consists of an intermediate layer and a through-hole, which penetrates the inner bottom wall of the liquid nitrogen storage chamber. The movable baffle is rotatably connected to the intermediate layer of the liquid guide port. The top wall of the movable baffle is elastically connected to the limiting plate through a bending spring. The bottom wall of the movable baffle is fixedly connected to a connecting plate and a sealing plug that matches the through-hole. A sphere is fixedly connected to the end of the connecting plate. The trapezoidal platform is located on the top of the filter plate and faces the sphere.

[0017] Preferably, the top of the mounting box corresponding to the liquid nitrogen storage chamber is connected to a liquid replenishment port for replenishing liquid nitrogen. In the initial state, there is a gap between the filter plate and the sphere. At this time, the liquid guide port is blocked. The gas thrust generated when the circulating fan rotates is sufficient to push the filter plate to move in the air inlet chamber. When the filter plate moves, the trapezoidal platform can contact the sphere.

[0018] Preferably, the electromagnetic reset assembly includes an electromagnet and a gas-conducting heat-conducting shell. The gas-conducting heat-conducting shell is fixed to the lower side of the bottom wall of the liquid nitrogen storage chamber and close to the liquid inlet. The electromagnet is fixedly installed inside the mounting box and located between the liquid inlet and the gas-conducting heat-conducting shell. A piston plate is slidably and sealed inside the gas-conducting heat-conducting shell. The lower side wall of the piston plate is elastically connected to the inner bottom wall of the gas-conducting heat-conducting shell by a spring. A trigger switch is fixedly connected to the inner bottom wall of the gas-conducting heat-conducting shell. A pressure block is fixedly connected to the lower side wall of the piston plate corresponding to the trigger switch. High-pressure nitrogen is filled between the lower side of the piston plate and the gas-conducting heat-conducting shell.

[0019] Preferably, the gas storage heat-conducting shell has a high thermal conductivity, the trigger switch is electrically connected to the electromagnet, and when the electromagnet is energized, the opposing surfaces of the electromagnet and the filter plate are magnetically identical. The pressure block and the trigger switch are both located inside the second spring. In the initial state, there is a gap between the pressure block and the trigger switch, and the second spring is in a stretched state. When the second spring is in the initial state, the pressure block and the trigger switch are in contact.

[0020] The beneficial effects of this invention are:

[0021] The circulating cooling system is located on the top and inner side of the cabinet, with a compact layout that makes full use of the cabinet space. Temperature sensors monitor the cabinet temperature in real time and are electrically connected to the circulating and exhaust fans, controlling their speed in a positive correlation with temperature. When the temperature rises, the fans accelerate to enhance ventilation and heat dissipation; when the temperature drops, the fans decelerate to avoid energy waste, achieving intelligent energy-saving heat dissipation control. In the circulating cooling system, the filter plate has heat exchange channels with highly thermally conductive particles on its surface and inside the channels, greatly enhancing the heat transfer efficiency with hot air. The highly thermally conductive particles on the filter plate and heat-conducting rod ensure that high and stable heat transfer performance is maintained under different operating conditions. Even if the ambient temperature or air flow changes, it can still effectively transfer heat, ensuring stable heat dissipation. Compared with traditional fan cooling, it can absorb heat from hot air more quickly, reduce the internal temperature of the cabinet, and improve heat dissipation efficiency.

[0022] The trigger cooling component automatically controls the release of liquid nitrogen based on the cabinet temperature. Liquid nitrogen cooling is automatically triggered when the temperature rises to a certain level and automatically stops when the temperature drops, preventing excessive use of liquid nitrogen and improving the energy efficiency of the cooling system. Even in high ambient temperatures, the expected heat dissipation effect can be achieved. The spiral blades promote thorough mixing of liquid nitrogen and air, more efficiently reducing the internal temperature of the cabinet. Simultaneously, they promote gas-liquid separation, providing a stable low-temperature operating environment for electrical equipment, reducing damage to equipment caused by excessive temperature and humidity, and helping to extend equipment lifespan. The electromagnetic reset component utilizes the low temperature of the liquid nitrogen flowing out to cause the high-pressure nitrogen gas in the gas-conducting heat-conducting shell to contract. A pressure block and trigger switch control the electromagnet's on / off state, thereby controlling the position of the filter plate and adjusting the opening and closing of the liquid inlet to prevent excessive or insufficient use of liquid nitrogen and maintain a stable cabinet temperature. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure of an energy-saving electrical equipment control cabinet provided by the present invention;

[0025] Figure 2 This is a schematic diagram of the internal structure of an energy-saving electrical equipment control cabinet provided by the present invention;

[0026] Figure 3 This is a front cross-sectional view of an energy-saving electrical equipment control cabinet provided by the present invention;

[0027] Figure 4This is a schematic diagram of the internal airflow direction structure of an energy-saving electrical equipment control cabinet provided by the present invention;

[0028] Figure 5 This is a partial cross-sectional structural diagram of an energy-saving electrical equipment control cabinet provided by the present invention;

[0029] Figure 6 This is a schematic diagram of the trapezoidal platform position structure of an energy-saving electrical equipment control cabinet provided by the present invention;

[0030] Figure 7 This is a schematic diagram of the structure of an energy-saving electrical equipment control cabinet with the liquid guide port open, provided by the present invention;

[0031] Figure 8 This invention provides an energy-saving electrical equipment control cabinet. Figure 7 Enlarged structural diagram at point A in the middle;

[0032] Figure 9 This is a schematic diagram of the structure of an energy-saving electrical equipment control cabinet electromagnet when energized, provided by the present invention;

[0033] Figure 10 This invention provides an energy-saving electrical equipment control cabinet. Figure 9 Enlarged structural diagram at point B.

[0034] In the diagram: 1. Cabinet; 2. Circulating fan; 3. Exhaust fan; 4. Dustproof net; 5. Mounting box; 6. Air inlet chamber; 7. Liquid nitrogen storage chamber; 8. Filter plate; 9. Gas storage and heat conduction shell; 11. Rain cover; 20. Temperature sensor; 21. Air duct; 22. Connecting pipe; 41. Card holder; 50. Mounting base; 51. Exhaust pipe; 61. Spiral blade; 62. Electromagnet; 70. Liquid guide port; 71. Liquid replenishment port; 72. Limiting plate; 73. Bending spring; 74. Movable baffle; 80. Heat exchange channel; 81. Trapezoidal platform; 82. Heat conduction rod; 83. Spring one; 91. Piston plate; 92. Pressure block; 93. Trigger switch; 94. Spring two; 511. Water baffle; 741. Connecting plate; 742. Sphere. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example 1, refer to Figures 1-5An energy-saving electrical equipment control cabinet includes a cabinet body 1. The side walls of the cabinet body 1 are provided with ventilation slots and rain shelters 11. The rain shelters 11 are fixedly installed on the outside of the ventilation slots to prevent rainwater from entering and protecting the internal equipment of the cabinet body 1 from rain damage. A temperature sensor 20 is installed on the top of the cabinet body 1, with its probe extending into the cabinet body 1. The temperature sensor 20 is used to monitor the internal temperature of the cabinet body 1. A circulation fan 2 and an exhaust fan 3 are installed on the side wall of the cabinet body 1 near the top. The cabinet body 1 also includes:

[0037] Circulating cooling assembly: The circulating cooling assembly is installed on the top and inside of cabinet 1;

[0038] Triggered cooling component: The triggered cooling component is located inside the circulating cooling component;

[0039] Electromagnetic reset assembly: The electromagnetic reset assembly is located inside the circulating cooling assembly.

[0040] Furthermore, the temperature sensor 20 is electrically connected to the circulating fan 2 and the exhaust fan 3. The value monitored by the temperature sensor 20 is positively correlated with the rotation speed of the circulating fan 2 and the exhaust fan 3. The temperature sensor 20 controls the rotation speed of the circulating fan 2 and the exhaust fan 3 by monitoring the temperature value, thereby achieving positive correlation control between temperature and rotation speed. This ensures that the higher the temperature, the faster the fan speed, thus enhancing ventilation and heat dissipation.

[0041] Two card slots 41 are fixedly installed on the inner side wall of the cabinet 1 corresponding to the rain shelter 11. The two card slots 41 are symmetrically distributed and a dustproof net 4 is movably connected between the two card slots 41. The dustproof net 4 can cover all the ventilation slots and prevent dust from entering the interior of the cabinet 1 through the ventilation slots. There is a gap between the top of the dustproof net 4 and the bottom of the circulation fan 2 and the exhaust fan 3, which makes it easy to remove and install the dustproof net 4.

[0042] Furthermore, the circulating cooling assembly includes an air guide duct 21, a connecting pipe 22, a mounting base 50, and an exhaust pipe 51. The mounting base 50 is fixed to the top of the cabinet 1, and a mounting box 5 is fixedly installed on the mounting base 50. The mounting box 5 has an air inlet chamber 6 and a liquid nitrogen storage chamber 7 inside. The air guide duct 21 is fixedly installed on the outer wall of the cabinet 1 and faces the circulating fan 2. It is used to guide the flow direction of the air blown out by the circulating fan 2. One end of the connecting pipe 22 is connected to the air guide duct 21, and the other end is connected to the left side of the air inlet chamber 6. The connecting pipe 22 guides the air blown out by the circulating fan 2 into the air inlet chamber 6. An exhaust pipe 51 is connected through the side of the air inlet chamber 6 away from the connecting pipe 22. The lower end of the exhaust pipe 51 penetrates the top wall of the cabinet 1 and extends into the interior of the cabinet 1. The treated gas is re-entered into the interior of the cabinet 1 through the exhaust pipe 51 to complete the gas cooling cycle.

[0043] A filter plate 8 is slidably connected inside the air inlet chamber 6 at the bottom of the liquid nitrogen storage chamber 7. The filter plate 8 is elastically connected to the left inner wall of the mounting box 5 by a spring 83. The filter plate 8 is provided with several heat exchange channels 80. Several heat-conducting rods 82 are fixedly connected to the side wall of the filter plate 8 near the spring 83. The ends of the heat-conducting rods 82 penetrate through the left side wall of the mounting box 5 and extend to the outside of the mounting box 5. The setting of the heat-conducting rods 82 makes the movement of the filter plate 8 more stable and facilitates the transfer of heat to the outside. The heat-conducting rods 82 can effectively dissipate the heat accumulated on the filter plate 8 through their exposed parts. A baffle plate 511 is fixedly installed inside the exhaust pipe 51 near the mounting box 5. The filter plate 8 is a magnetic lightweight plate. When the circulating fan 2 rotates and generates gas thrust, the filter plate 8 moves in the air inlet chamber 6 and changes its position to participate in the subsequent trigger cooling process.

[0044] It should be noted that the surfaces of the filter plate 8 and the heat-conducting rod 82, as well as the heat exchange channel 80, are all provided with high thermal conductivity particles, such as metal (e.g., silver, copper) or ceramic (e.g., alumina, boron nitride) particles. These particles have a higher thermal conductivity than the matrix materials of the filter plate 8 and the heat-conducting rod 82. The placement of these particles on the surfaces of the filter plate 8 and the heat-conducting rod 82, as well as in the heat exchange channel 80, is equivalent to constructing numerous highly efficient heat conduction "highways" within the material. When heat is transferred to the area containing these high thermal conductivity particles, the high thermal conductivity of the particles allows for faster heat conduction, reducing thermal resistance. For example, silver particles have a thermal conductivity as high as 429 W / (m·K). The heat conductivity (K) is much higher than that of ordinary metal or non-metal materials. After silver particles are distributed on the surface of the filter plate 8, heat can spread rapidly along the silver particles, which greatly improves the heat conduction efficiency of the filter plate 8. When hot air comes into contact with the heat exchange channel 80 of the filter plate 8, the heat can be transferred to the interior of the filter plate 8 and the heat conduction rod 82 through the path composed of multiple high thermal conductivity particles, and then transferred to the outside, thereby improving the overall heat conduction capacity. It can exchange heat with the hot air entering through the connecting pipe 22. There is a gap between the baffle plate 511 and the top of the inner wall of the exhaust pipe 51. The baffle plate 511 can prevent liquids such as condensate that may be generated from entering the interior of the cabinet 1.

[0045] In this embodiment, the temperature sensor 20 continuously monitors the temperature inside the cabinet 1. When the temperature inside the cabinet 1 rises, the temperature sensor 20 converts the temperature signal into an electrical signal. Since it is electrically connected to the circulating fan 2 and the exhaust fan 3 and the monitored value is positively correlated with the fan speed, the speed of the circulating fan 2 and the exhaust fan 3 will increase accordingly. The speed of the circulating fan 2 increases, the amount of air blown out increases, and the force of pushing the air is stronger.

[0046] The air blown out by the circulating fan 2 is guided by the air guide tube 21 and enters the air intake chamber 6 along the connecting pipe 22. The air guide tube 21 plays a role in directional airflow guidance, ensuring that the air blown out by the circulating fan 2 can accurately enter the connecting pipe 22, avoiding airflow dispersion and improving air intake efficiency. The other part is directly discharged from the cabinet 1 by the exhaust fan 3.

[0047] The air entering the intake chamber 6 is pushed by the gas thrust generated by the circulating fan 2 to slide the filter plate 8 in the intake chamber 6. The filter plate 8 is elastically connected to the inner wall of the left side of the mounting box 5 by spring 83. Under the push of the airflow, it moves to the right against the elastic force of spring 83. At the same time, the heat exchange channels 80 set in the filter plate 8 begin to play their role. Since the surface of the filter plate 8 and the heat-conducting rod 82 and the heat exchange channels 80 are all equipped with high thermal conductivity particles, they can fully exchange heat with the hot air passing through.

[0048] The heat exchange channel 80 within the filter plate 8 is the area in direct contact with hot air. The presence of high thermal conductivity particles allows the channel walls to absorb heat from the hot air more quickly. As the hot air passes through the heat exchange channel 80, the heat is rapidly transferred to the high thermal conductivity particles on the channel walls, and then to the entire filter plate 8, causing the temperature of the hot air to drop more quickly. This is crucial for rapidly cooling the hot air entering the intake chamber 6, helping to improve the cooling efficiency of the entire circulating cooling system and more effectively reducing the temperature inside the cabinet 1. The high thermal conductivity particles not only accelerate the absorption of heat from the hot air by the filter plate 8, but also promote the uniform distribution of heat inside the filter plate 8. When a part of the filter plate 8 absorbs heat, it is transferred through the heat conduction network composed of high thermal conductivity particles. Heat can be quickly diffused to other parts of the filter plate 8, avoiding local overheating. At the same time, these particles also help to transfer the heat absorbed by the filter plate 8 to the connected heat-conducting rod 82 more quickly, further enhancing the heat dissipation capacity of the filter plate 8. The function of the heat-conducting rod 82 is to transfer the heat absorbed by the filter plate 8 to the outside of the mounting box 5. When the heat of the filter plate 8 is transferred to the heat-conducting rod 82, the high thermal conductivity particles can accelerate the heat conduction inside the heat-conducting rod 82, so that the heat can be transferred from one end of the heat-conducting rod 82 to the other end and dissipated into the external environment more quickly. This helps to improve the efficiency of heat dissipation of the heat-conducting rod 82, ensuring that the heat absorbed by the filter plate 8 can be discharged in a timely and effective manner, maintaining the good heat exchange performance of the filter plate 8.

[0049] In the above process, on the one hand, the heat-conducting rod 82 plays a role in stabilizing the movement of the filter plate 8, making it less prone to shaking during sliding; on the other hand, it effectively conducts heat to the external environment, reducing the temperature of the filter plate 8 and the air intake chamber 6. The presence of high thermal conductivity particles can ensure that the heat-conducting rod 82 maintains a high thermal conductivity at different positions. Even when the movement of the filter plate 8 causes a certain change in the force or position of the heat-conducting rod 82, its thermal conductivity performance can be guaranteed to be stable. This is of great significance for the continuous and stable operation of the entire circulating cooling assembly, and avoids the heat dissipation effect of the entire system being affected by the decrease in the thermal conductivity performance of the heat-conducting rod 82.

[0050] After passing through the filter plate 8 for heat exchange, the air enters the cabinet 1 again from the air inlet 6 through the exhaust pipe 51. During the process of air entering the cabinet 1, the baffle plate 511 prevents liquids such as condensate that may be generated due to temperature changes from entering the cabinet 1, thus avoiding damage to the electrical equipment.

[0051] In existing technologies, relying solely on fans to accelerate airflow, the heat exchange between hot air and the external environment is mainly achieved through natural convection and forced convection by fans, resulting in relatively limited heat exchange efficiency. However, this application incorporates a filter plate 8 with a heat exchange channel 80 and high thermal conductivity particles on its surface and inside the channel. When hot air passes through the heat exchange channel 80, the high thermal conductivity particles significantly enhance the heat transfer efficiency between the filter plate 8 and the hot air, enabling it to absorb heat from the hot air more quickly and lower its temperature faster. For example, under the same hot air flow and temperature conditions, a system with a filter plate 8 containing high thermal conductivity particles can reduce the hot air temperature by a greater margin, thus more effectively reducing the internal temperature of the cabinet 1 compared to direct fan cooling.

[0052] Furthermore, the heat dissipation effect of a fan is greatly affected by factors such as ambient temperature and airflow resistance. When the external environment changes, the heat dissipation effect may fluctuate significantly. This application uses high thermal conductivity particles on the surface of the filter plate 8, the heat-conducting rod 82, and the heat exchange channel 80 to ensure that high and stable heat conduction performance can be maintained under different operating conditions. Even when the ambient temperature changes or the airflow state changes, heat can still be effectively transferred, ensuring the stability of the heat dissipation effect. For example, when the ambient temperature suddenly rises, direct fan heat dissipation may become less effective due to the decrease in the temperature difference between the ambient temperature and the inside of the cabinet 1. However, this heat dissipation method can still maintain good heat dissipation performance through heat conduction enhanced by high thermal conductivity particles.

[0053] The temperature sensor 20 automatically adjusts the speed of the circulating fan 2 and the exhaust fan 3 according to the temperature, realizing intelligent heat dissipation control. When the temperature rises, the fan speed increases to enhance the ventilation and heat dissipation effect; when the temperature drops, the fan speed decreases to avoid unnecessary energy consumption and achieve energy saving. The design of the filter plate 8 and its heat exchange channel 80 increases the contact area and heat exchange time between the air and the filter plate 8, improving heat exchange efficiency. The heat-conducting rod 82 not only assists in heat dissipation but also ensures the stability of the filter plate 8 as it moves within the air intake chamber 6. This stability helps maintain the normal operation of the entire circulating cooling assembly, avoiding problems such as component damage or gas leakage caused by the shaking of the filter plate 8, thus improving the reliability and service life of the equipment. The entire circulating cooling assembly is located on the top and inside of the cabinet 1, with a compact layout that makes full use of the space in the cabinet 1 and facilitates the connection and collaborative work between various components.

[0054] Example 2, refer to Figures 5-8 The cooling trigger assembly includes a trapezoidal platform 81, a spiral blade 61, a limiting plate 72, a bending spring 73, a movable baffle 74, and a liquid guide port 70 on the bottom wall of the liquid nitrogen storage chamber 7. The spiral blade 61 is fixedly installed inside the air inlet chamber 6 and located on the right side of the liquid nitrogen storage chamber 7. The liquid nitrogen storage chamber 7 is filled with liquid nitrogen, which is a liquid with an extremely low temperature (boiling point of -196℃). When liquid nitrogen is introduced into the control cabinet cooling system, it vaporizes rapidly. The vaporization process of liquid nitrogen is an endothermic process, which can absorb a large amount of heat, thereby achieving rapid cooling. For example, each gram of liquid nitrogen can absorb approximately 200 joules when vaporized. The heat is generated, which makes it highly efficient in cooling electrical equipment control cabinets. The limiting plate 72 is fixed on the inner bottom wall of the liquid nitrogen storage chamber 7. The liquid guide port 70 consists of an intermediate layer and a through-hole. The through-hole penetrates the inner bottom wall of the liquid nitrogen storage chamber 7. The movable baffle 74 is rotatably connected to the intermediate layer of the liquid guide port 70. The top wall of the movable baffle 74 is elastically connected to the limiting plate 72 by a bending spring 73. The bottom wall of the movable baffle 74 is fixedly connected to a connecting plate 741 and a sealing plug that matches the through-hole. The end of the connecting plate 741 is fixedly connected to a ball 742. The trapezoidal platform 81 is set on the top of the filter plate 8 and faces the ball 742.

[0055] It should be noted that the top of the mounting box 5 corresponding to the liquid nitrogen storage chamber 7 is connected to a liquid nitrogen inlet 71 for replenishing liquid nitrogen into the liquid nitrogen storage chamber 7. In the initial state, there is a gap between the filter plate 8 and the sphere 742. At this time, the liquid guide port 70 is in a blocked state. Under the action of the bending spring 73, the sealing plug at the bottom of the movable baffle 74 tightly blocks the opening of the liquid guide port 70, and the liquid nitrogen in the liquid nitrogen storage chamber 7 cannot flow out. At this time, the airflow generated by the rotation of the circulating fan 2 passes through the connecting pipe. 22 enters the intake chamber 6, pushing the filter plate 8 to slide within the intake chamber 6. The heat exchange channel 80 on the filter plate 8 exchanges heat with the hot air, providing preliminary cooling to the air. The gas thrust generated when the circulating fan 2 rotates is sufficient to push the filter plate 8 to move within the intake chamber 6. When the filter plate 8 moves, the trapezoidal platform 81 can contact the sphere 742. When the trapezoidal platform 81 contacts the sphere 742, through its inclined surface, it can lift the movable baffle 74 through the sphere 742, thereby opening the liquid guide port 70.

[0056] In this embodiment, in the initial state, there is a gap between the filter plate 8 and the sphere 742. Under the action of the bending spring 73, the sealing plug at the bottom of the movable baffle 74 tightly blocks the opening of the liquid guide port 70, and the liquid nitrogen in the liquid nitrogen storage chamber 7 cannot flow out. At this time, the airflow generated by the rotation of the circulating fan 2 enters the air intake chamber 6 through the connecting pipe 22, pushing the filter plate 8 to slide in the air intake chamber 6. The heat exchange channel 80 on the filter plate 8 exchanges heat with the hot air, and performs preliminary cooling of the air.

[0057] Reference Figures 7-8 As the temperature inside the cabinet 1 rises, the speed of the circulating fan 2 increases, and the resulting gas thrust increases, further pushing the filter plate 8 to move within the air intake chamber 6. When the filter plate 8 moves to a certain position, the trapezoidal platform 81 at its top contacts the sphere 742. As the filter plate 8 continues to move, the trapezoidal platform 81 pushes the sphere 742, which in turn drives the movable baffle 74 to rotate around the middle layer of the liquid guide port 70. The rotation of the movable baffle 74 overcomes the elastic force of the bending spring 73, causing the sealing plug to detach from the opening of the liquid guide port 70. The liquid nitrogen in the liquid nitrogen storage chamber 7 flows out through the liquid guide port 70 and enters the air intake chamber 6.

[0058] The outflowing liquid nitrogen mixes with the air that has been preliminarily cooled by the filter plate 8 in the air intake chamber 6. The liquid nitrogen rapidly vaporizes and absorbs a large amount of heat, further reducing the air temperature. The function of the spiral blades 61 is to make the air entering the air intake chamber 6 rotate and flow, promote the full mixing of liquid nitrogen and air, and improve the cooling efficiency. At the same time, the spiral blades 61 can also trap moisture or condensed water droplets in the air intake chamber 6, promoting gas-liquid separation. The cooled air enters the cabinet 1 through the exhaust pipe 51, achieving the cooling of the inside of the cabinet 1.

[0059] When the temperature inside cabinet 1 decreases, the speed of circulating fan 2 decreases, the gas thrust decreases, the filter plate 8 moves to the left and resets under the action of spring 83, the trapezoidal platform 81 disengages from the ball 742, the movable baffle 74 rotates in the opposite direction under the elastic force of bending spring 73, the sealing plug re-blocks the opening of liquid guide port 70, stops the outflow of liquid nitrogen, and waits for the next temperature rise to trigger.

[0060] This trigger-activated cooling component can automatically control the release of liquid nitrogen based on temperature changes inside the cabinet 1, achieving intelligent cooling. When the temperature rises to a certain level, liquid nitrogen cooling is automatically triggered, and when the temperature drops, the liquid nitrogen flow is automatically stopped, avoiding excessive use and waste of liquid nitrogen and improving the energy efficiency of the cooling system. Even when the outside temperature is high, the expected heat dissipation effect can be achieved. The spiral blades 61 promote the full mixing of liquid nitrogen and air, enabling the liquid nitrogen to absorb heat from the air more effectively, enhancing the cooling effect. Compared with simply relying on fan cooling or simple heat exchange, it can reduce the internal temperature of the cabinet 1 more quickly and efficiently, providing a more stable low-temperature operating environment for electrical equipment and helping to extend the service life of electrical equipment.

[0061] Example 3, refer to Figures 7-10 The electromagnetic reset assembly includes an electromagnet 62 and a gas storage and heat conduction shell 9. The gas storage and heat conduction shell 9 is fixed to the lower side of the bottom wall of the liquid nitrogen storage chamber 7 and close to the liquid outlet 70. The electromagnet 62 is fixedly installed inside the mounting box 5 and located between the liquid outlet 70 and the gas storage and heat conduction shell 9, which can prevent the filter plate 8 from moving excessively. A piston plate 91 is slidably and sealed inside the gas storage and heat conduction shell 9. The lower side wall of the piston plate 91 is elastically connected to the inner bottom wall of the gas storage and heat conduction shell 9 by a spring 94. A trigger switch 93 is fixedly connected to the inner bottom wall of the gas storage and heat conduction shell 9. A pressure block 92 is fixedly connected to the lower side wall of the piston plate 91 corresponding to the trigger switch 93, ensuring that the pressure block 92 can act on the trigger switch 93. High-pressure nitrogen is filled between the lower side of the piston plate 91 and the gas storage and heat conduction shell 9.

[0062] It should be noted that the thermal conductivity of the gas storage heat-conducting shell 9 is high (in particular, when liquid nitrogen has not flowed out, the gas temperature change in the inlet chamber 6 is relatively limited, so the hot air temperature change in the inlet chamber 6 has little impact on the gas volume in the gas storage heat-conducting shell 9). When liquid nitrogen flows out, the high-pressure nitrogen in the gas storage heat-conducting shell 9 will contract upon cooling, and the trigger switch 93 will be electrically connected to the electromagnet 62. When the trigger switch 93 is squeezed, the electromagnet 62 will be energized. When the electromagnet 62 is energized, the opposing surfaces of the electromagnet 62 and the filter plate 8 will have the same magnetic poles. At this time, under the action of magnetic force, the filter plate 8 will move to the left, the trapezoidal platform 81 will no longer be in contact with the sphere 742, the liquid outlet 70 will be resealed, and the pressure block 92 and the trigger switch 93 will both be located inside the second spring 94. In the initial state, there is a gap between the pressure block 92 and the trigger switch 93, and the second spring 94 is in a stretched state. When the second spring 94 is in the initial state, the pressure block 92 is in contact with the trigger switch 93 (refer to...). Figure 10 When the gas volume inside the gas storage and heat conduction shell 9 decreases, the pressure block 92 will contact the trigger switch 93 under the action of the spring 94.

[0063] In this embodiment, in the initial state, spring 2 94 is in a stretched state, and there is a gap between pressure block 92 and trigger switch 93. At this time, electromagnet 62 is not energized, filter plate 8 is in a normal position (a balanced position affected by the airflow thrust of circulating fan 2 and other factors such as spring 1 83), liquid guide port 70 is in a closed state under the sealing plug of movable baffle 74, liquid nitrogen in liquid nitrogen storage chamber 7 will not flow out, gas storage heat conduction shell 9 is filled with high pressure nitrogen, and the gas is in a certain initial state to prepare for subsequent temperature response.

[0064] Because of the high thermal conductivity of the gas storage heat conduction shell 9, when liquid nitrogen flows out from the liquid outlet 70, the liquid nitrogen undergoes a phase change from liquid to gas. This process absorbs a large amount of heat, which causes the ambient temperature to drop rapidly. Since the gas storage heat conduction shell 9 is close to the liquid outlet 70, the low temperature environment generated by the liquid nitrogen phase change will quickly draw heat out from the high-pressure nitrogen gas inside the gas storage heat conduction shell 9.

[0065] According to the ideal gas law PV = nRT (where P is pressure, V is volume, n is amount of substance, R is the ideal gas constant, and T is temperature), when the temperature T of the high-pressure nitrogen gas inside the gas storage heat-conducting shell 9 decreases, while the amount of substance n remains constant, the pressure P temporarily remains unchanged (because the gas storage heat-conducting shell 9 is a relatively sealed space), and the gas volume V will decrease. This is because the decrease in temperature weakens the thermal motion of gas molecules, reduces the distance between molecules, and thus reduces the gas volume. The decrease in gas volume inside the gas storage heat-conducting shell 9 will reduce the gas pressure on the piston plate 91. Plate 91 is in equilibrium, subjected to upward gas pressure and downward elastic force of spring 94. When the gas pressure decreases, the elastic force of spring 94 becomes dominant, pushing piston plate 91 downward. The downward movement of piston plate 91 causes pressure block 92 to move together, gradually bringing pressure block 92 closer to trigger switch 93. This motion transmission is a continuous process. As the gas volume further decreases, pressure block 92 will eventually squeeze trigger switch 93. When pressure block 92 squeezes trigger switch 93, it will change the working state of electromagnet 62, thereby controlling the position of filter plate 8.

[0066] When electromagnet 62 is energized, its opposite surface to filter plate 8 has the same magnetic pole. According to the principle of like poles repulsion, electromagnet 62 generates a repulsive force on filter plate 8. Due to the existence of this repulsive force, filter plate 8 begins to move to the left, driving trapezoidal platform 81 to move to the left, so that trapezoidal platform 81 is no longer in contact with sphere 742. After trapezoidal platform 81 is no longer in contact with sphere 742, movable baffle 74 is reset under the elastic force of bending spring 73, resealing liquid outlet 70 and preventing liquid nitrogen from continuing to flow out of liquid nitrogen storage chamber 7. This action can prevent excessive use of liquid nitrogen, avoid excessively low temperature in cabinet 1 or waste of liquid nitrogen, and realize automatic adjustment of the cooling process.

[0067] By capturing the low temperature generated when liquid nitrogen flows out, and utilizing the thermal expansion and contraction characteristics of high-pressure nitrogen in the gas storage and heat conduction shell 9, along with the pressure block 92 and trigger switch 93, the electromagnet 62 is energized and de-energized to control the position of the filter plate 8. Finally, the opening and closing of the liquid guide port 70 is adjusted to determine whether liquid nitrogen continues to flow out. This ensures that the cooling process closely matches the actual temperature requirements inside the cabinet 1, avoids excessive or insufficient use of liquid nitrogen, maintains the temperature stability inside the cabinet 1, and provides a more stable and suitable temperature environment for electrical equipment.

[0068] It should be noted that the specific models and specifications of the temperature sensor 20, the circulating fan 2, and the exhaust fan 3 need to be selected and determined according to the actual specifications of the device. The specific selection and calculation method adopts the existing technology in this field, so it will not be described in detail.

[0069] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. 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 energy-saving electrical equipment control cabinet, comprising a cabinet body (1), the side wall of the cabinet body (1) is provided with a ventilation slot and a rain cover (11), the rain cover (11) is fixedly arranged outside the ventilation slot, a temperature sensor (20) is installed on the top of the cabinet body (1), the probe of the temperature sensor (20) extends into the cabinet body (1), and a circulating fan (2) and an exhaust fan (3) are installed on the side wall of the cabinet body (1) near the top of the cabinet body (1), characterized in that, Also includes: Circulating cooling assembly: The circulating cooling assembly is located on the top and inner side of the cabinet (1); the circulating cooling assembly includes an air guide duct (21), a connecting pipe (22), a mounting base (50), and an exhaust pipe (51). The mounting base (50) is fixed on the top of the cabinet (1), and a mounting box (5) is fixedly installed on the mounting base (50). The mounting box (5) has an air inlet chamber (6) and a liquid nitrogen storage chamber (7) inside. The air guide duct (21) is fixedly installed on the outer wall of the cabinet (1) and is directly opposite to the circulating fan (2). One end of the connecting pipe (22) is connected to the air guide duct (21), and the other end is connected to the left side of the air inlet chamber (6). An exhaust pipe (51) is connected through the side of the air inlet chamber (6) away from the connecting pipe (22). 1) The lower end of the exhaust pipe (51) penetrates the top wall of the cabinet (1) and extends into the interior of the cabinet (1); a filter plate (8) is slidably connected in the air inlet chamber (6) at the bottom of the liquid nitrogen storage chamber (7). The filter plate (8) is elastically connected to the left inner wall of the mounting box (5) by a spring (83). The filter plate (8) is provided with several heat exchange channels (80). Several heat-conducting rods (82) are fixedly connected to the side wall of the filter plate (8) near the spring (83). The ends of the heat-conducting rods (82) penetrate the left side wall of the mounting box (5) and extend to the outside of the mounting box (5). A baffle plate (511) is fixedly installed inside the exhaust pipe (51) near the mounting box (5). The filter plate (8) is a magnetic lightweight plate. Triggered cooling assembly: The triggered cooling assembly is located inside the circulating cooling assembly; the triggered cooling assembly includes a trapezoidal platform (81), a spiral blade (61), a limiting plate (72), a bending spring (73), a movable baffle (74), and a liquid guide port (70) opened on the bottom wall of the liquid nitrogen storage chamber (7). The spiral blade (61) is fixedly installed inside the air inlet chamber (6) and located on the right side of the liquid nitrogen storage chamber (7). The liquid nitrogen storage chamber (7) is filled with liquid nitrogen. The limiting plate (72) is fixed on the bottom wall of the liquid nitrogen storage chamber (7). The liquid guide port (70) is located on the right side of the liquid nitrogen storage chamber (7). 0) It consists of an intermediate layer and a through-hole, which penetrates the inner bottom wall of the liquid nitrogen storage chamber (7). The movable baffle (74) is rotatably connected to the intermediate layer of the liquid guide port (70). The top wall of the movable baffle (74) is elastically connected to the limiting plate (72) by a bending spring (73). The bottom wall of the movable baffle (74) is fixedly connected to a connecting plate (741) and a sealing plug that matches the through-hole. The end of the connecting plate (741) is fixedly connected to a ball (742). The trapezoidal platform (81) is set on the top of the filter plate (8) and faces the ball (742). Electromagnetic reset assembly: The electromagnetic reset assembly is located inside the circulating cooling assembly. The electromagnetic reset assembly includes an electromagnet (62) and a gas storage heat conduction shell (9). The gas storage heat conduction shell (9) is fixed on the lower side of the bottom wall of the liquid nitrogen storage chamber (7) and close to the liquid outlet (70). The electromagnet (62) is fixed inside the mounting box (5) and located between the liquid outlet (70) and the gas storage heat conduction shell (9). The gas storage heat conduction shell (9) is slidably sealed with a piston plate (91). The lower side wall of the piston plate (91) is elastically connected to the inner bottom wall of the gas storage heat conduction shell (9) by a spring (94). The inner bottom wall of the gas storage heat conduction shell (9) is fixedly connected with a trigger switch (93). The lower side wall of the piston plate (91) corresponding to the trigger switch (93) is fixedly connected with a pressure block (92). The space between the lower side of the piston plate (91) and the gas storage heat conduction shell (9) is filled with high-pressure nitrogen.

2. The energy-saving electrical equipment control cabinet according to claim 1, characterized in that, The temperature sensor (20) is electrically connected to the circulating fan (2) and the exhaust fan (3), and the value monitored by the temperature sensor (20) is positively correlated with the rotation speed of the circulating fan (2) and the exhaust fan (3).

3. The energy-saving electrical equipment control cabinet according to claim 1, characterized in that, Two card holders (41) are fixedly installed on the inner side wall of the cabinet (1) corresponding to the rain shelter (11). The two card holders (41) are symmetrically distributed. A dustproof net (4) is installed between the two card holders (41) and is movably snapped together. The dustproof net (4) can cover all the ventilation slots. There is a gap between the top of the dustproof net (4) and the bottom of the circulation fan (2) and the exhaust fan (3).

4. The energy-saving electrical equipment control cabinet according to claim 1, characterized in that, High thermal conductivity particles are provided on the surface of the filter plate (8) and the heat-conducting rod (82) and the heat exchange channel (80). There is a gap between the baffle plate (511) and the top of the inner wall of the exhaust pipe (51).

5. The energy-saving electrical equipment control cabinet according to claim 1, characterized in that, The top of the mounting box (5) corresponding to the liquid nitrogen storage chamber (7) is connected to a liquid replenishment port (71) for replenishing liquid nitrogen. In the initial state, there is a gap between the filter plate (8) and the sphere (742). At this time, the liquid guide port (70) is blocked. The gas thrust generated when the circulation fan (2) rotates is sufficient to push the filter plate (8) to move in the air inlet chamber (6). When the filter plate (8) moves, the trapezoidal platform (81) can contact the sphere (742).

6. The energy-saving electrical equipment control cabinet according to claim 1, characterized in that, The gas storage heat-conducting shell (9) has a high thermal conductivity. The trigger switch (93) is electrically connected to the electromagnet (62). When the electromagnet (62) is energized, the opposite surfaces of the electromagnet (62) and the filter plate (8) are magnetically identical. The pressure block (92) and the trigger switch (93) are both located inside the second spring (94). In the initial state, there is a gap between the pressure block (92) and the trigger switch (93), and the second spring (94) is in a stretched state. When the second spring (94) is in the initial state, the pressure block (92) and the trigger switch (93) are in contact.

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