Energy-saving electrical equipment control cabinet

Abstract

The invention provides an energy-saving electrical equipment control cabinet, which belongs to the technical field of electric control cabinet cooling, and comprises a cabinet body, a circulating cooling assembly, a trigger cooling assembly and an electromagnetic reset assembly, the temperature sensor monitors the temperature of the cabinet body in real time and cooperates with the circulating fan and the exhaust fan to realize energy-saving heat dissipation control; the high-heat-conduction particles ensure that the high heat conduction performance can be maintained under different working conditions, even if the environment temperature or the air flowing state is changed, heat can still be transferred, and the heat dissipation effect is ensured; the trigger cooling assembly controls liquid nitrogen release according to the temperature of the cabinet body, automatically triggers liquid nitrogen cooling when the temperature rises to a certain degree, and automatically stops after the temperature is reduced, so that liquid nitrogen is prevented from being excessively used, and an expected heat dissipation effect can be achieved even if the external temperature is relatively high; liquid nitrogen and air are promoted to be fully mixed through the spiral blades, meanwhile, gas-liquid separation can be promoted, a stable low-temperature operation environment is provided for electrical equipment, and damage to the equipment due to too high temperature and moisture is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of electric control cabinet cooling, and in particular to an energy-saving electric equipment control cabinet. Background Art

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

[0003] In the existing cooling technology of electric control cabinets, the air flow is generally accelerated by the operation of fans. In this mode, the heat exchange between hot air and the external environment is mainly carried out by natural convection and fan forced convection. The heat exchange efficiency is relatively limited. More importantly, the heat dissipation effect of the fan is highly dependent on external factors such as ambient temperature and air flow resistance. Once the external environment changes, the heat dissipation effect is likely to fluctuate violently. 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 is running at full capacity, the heat dissipation speed of the hot air will drop significantly. For example, in the hot summer, the outdoor temperature is as high as 35°C or even higher. When the fan in the electric control cabinet dissipates heat, due to the high temperature of the inhaled air, its heat dissipation effect will be greatly weakened compared to cool weather, causing the equipment in the electric control cabinet to easily malfunction due to overheating.

[0004] How to invent an energy-saving electrical equipment control cabinet to solve these problems has become an urgent problem to be solved by technical personnel in this field. Summary of the invention

[0005] In order to make up for the above shortcomings, the present invention provides an energy-saving electrical equipment control cabinet, aiming to solve the problems mentioned in the above background.

[0006] The present invention is achieved in that:

[0007] The present invention provides an energy-saving electrical equipment control cabinet, comprising a cabinet, a side wall of the cabinet is provided with a ventilation groove and a rain shielding eave, the rain shielding eave is fixedly arranged on the outside of the ventilation groove, a temperature sensor is installed on the top of the cabinet, the probe of the temperature sensor extends into the cabinet, a circulation fan and an exhaust fan are installed on the side wall of the cabinet near the top of the cabinet, and further comprising:

[0008] Circulating cooling component: The circulating cooling component is arranged on the top and inner side of the cabinet;

[0009] Trigger cooling component: the trigger cooling component is arranged inside the circulating cooling component;

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

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

[0012] Preferably, two sockets are fixedly installed on the inner wall of the cabinet corresponding to the rain shelter, and the two sockets are symmetrically distributed. A dustproof net is movably installed between the two sockets, and the dustproof net can cover all the air grooves. 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 duct, a connecting pipe, a mounting base and an exhaust duct, the mounting base is fixed on the top of the cabinet, an installation box is fixedly arranged on the mounting base, an air inlet cavity and a liquid nitrogen storage cavity are arranged inside the installation box, the air duct is fixedly arranged on the outer wall of the cabinet and is directly opposite to the circulating fan, one end of the connecting pipe is connected to the air duct, and the other end is connected to the left side of the air inlet cavity, one side of the air inlet cavity away from the connecting pipe is connected with an exhaust duct, and the lower end of the exhaust duct passes through the top wall of the cabinet and extends to the interior of the cabinet.

[0014] Preferably, a filter plate is slidably connected to the air inlet cavity at the bottom of the liquid nitrogen storage cavity, and the filter plate is elastically connected to the left inner wall of the installation box through a spring 1. A plurality of heat exchange channels are provided in the filter plate, and a plurality of heat conducting rods are fixedly connected to the side wall of the filter plate near the spring 1, and the ends of the heat conducting rods penetrate the left wall of the installation box and extend to the outside of the installation box. A water retaining plate is fixedly installed inside the exhaust pipe near the installation box, and the filter plate is a magnetic light plate.

[0015] Preferably, high thermal conductivity particles are provided on the surfaces of the filter plate and the heat-conducting rod and on the heat exchange channel, and a gap exists between the water retaining plate and the top of the inner wall of the exhaust pipe.

[0016] Preferably, the triggered cooling component comprises a trapezoidal platform, a spiral blade, a limit plate, a bending spring, a movable baffle and a liquid guide port opened on the inner bottom wall of the liquid nitrogen storage chamber, the spiral blade is fixedly arranged inside the air inlet chamber and located on the right side of the liquid nitrogen storage chamber, the interior of the liquid nitrogen storage chamber is filled with liquid nitrogen, the limit plate is fixed on the inner bottom wall of the liquid nitrogen storage chamber, the liquid guide port is composed of an intermediate layer and a through port, the through port passes through 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 limit plate by a bending spring, the bottom wall of the movable baffle is fixedly connected with a connecting plate and a sealing plug matching the through port, the end of the connecting plate is fixedly connected with a sphere, and the trapezoidal platform is arranged on the top of the filter plate and faces the side of the sphere.

[0017] Preferably, a liquid replenishing port for replenishing liquid nitrogen is connected through the top of the installation box corresponding to the liquid nitrogen storage chamber. There is a gap between the filter plate and the sphere in the initial state. At this time, the liquid guide port is in a blocked state. 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 storage heat-conducting shell, the gas storage heat-conducting shell is fixed on the lower side of the bottom wall of the liquid nitrogen storage chamber and close to the liquid guide port, the electromagnet is fixedly arranged inside the mounting box and is located between the liquid guide port and the gas storage heat-conducting shell, the internal sliding sealing connection of the gas storage heat-conducting shell is provided with a piston plate, the lower side wall of the piston plate and the inner bottom wall of the gas storage heat-conducting shell are elastically connected by a spring, the inner bottom wall of the gas storage heat-conducting shell is fixedly connected with a trigger switch, the lower side wall of the piston plate corresponding to the trigger switch is fixedly connected with a pressure block, and the space between the lower side of the piston plate and the gas storage heat-conducting shell is filled with high-pressure nitrogen.

[0019] Preferably, the thermal conductivity of the gas storage heat-conducting shell is high, the trigger switch is electrically connected to the electromagnet, and the opposite surfaces of the electromagnet and the filter plate are of the same polarity when the electromagnet is energized. The pressure block and the trigger switch are both located on the inner side of the second spring. There is a gap between the pressure block and the trigger switch in the initial state, and the second spring is in a stretched state. When the second spring is in the initial state, the pressure block is in contact with the trigger switch.

[0020] The beneficial effects of the present invention are:

[0021] The circulating cooling component is arranged on the top and inside of the cabinet, with a compact layout, making full use of the cabinet space. The temperature sensor monitors the cabinet temperature in real time, is electrically connected to the circulating fan and exhaust fan, and controls their speed to be positively correlated with the temperature. When the temperature rises, the fan accelerates to enhance ventilation and heat dissipation. When the temperature drops, the fan slows down to avoid energy waste and realize intelligent energy-saving heat dissipation control. In the circulating cooling component, the filter plate is provided with a heat exchange channel and high thermal conductivity particles on the surface and in the channel, which greatly enhances the heat conduction efficiency with the hot air. The high thermal conductivity particles on the filter plate and the heat conducting rod ensure that a high and stable thermal conductivity performance can be maintained under different working conditions. Even if the ambient temperature or air flow state changes, it can still effectively transfer heat to ensure stable heat dissipation effect. Compared with traditional fan heat dissipation, it can absorb the heat of hot air more quickly, reduce the temperature inside the cabinet, and improve heat dissipation efficiency.

[0022] The trigger cooling component automatically controls the release of liquid nitrogen according to the cabinet temperature. When the temperature rises to a certain level, liquid nitrogen cooling is automatically triggered, and it stops automatically after the temperature drops, avoiding excessive use of liquid nitrogen and improving the energy efficiency of the cooling system. Even if the outside temperature is high, the expected heat dissipation effect can be achieved; the spiral blades promote the full mixing of liquid nitrogen and air, which can more efficiently reduce the internal temperature of the cabinet, and at the same time promote gas-liquid separation, providing a stable low-temperature operating environment for electrical equipment, reducing damage to equipment due to excessive temperature and moisture, and helping to extend the life of the equipment; the electromagnetic reset component uses the low temperature of liquid nitrogen when it flows out to shrink the high-pressure nitrogen in the gas storage heat-conducting shell, and controls the power on and off of the electromagnet through the pressure block and the trigger switch, thereby controlling the position of the filter plate and adjusting the opening and closing of the liquid guide port to prevent excessive or insufficient use of liquid nitrogen and maintain the cabinet temperature stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

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

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

[0028] Figure 5 It is a schematic diagram of a partial cross-section structure of an energy-saving electrical equipment control cabinet provided by the present invention;

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

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

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

[0032] Fig. 9 It is a schematic diagram of the structure of an energy-saving electrical equipment control cabinet electromagnet when it is powered on;

[0033] Fig.10 This invention provides an energy-saving electrical equipment control cabinet Fig. 9 Enlarged structural diagram at B in the middle.

[0034] In the figure: 1. cabinet; 2. circulation fan; 3. exhaust fan; 4. dust screen; 5. installation box; 6. air inlet chamber; 7. liquid nitrogen storage chamber; 8. filter plate; 9. gas storage heat transfer shell; 11. rain shield; 20. temperature sensor; 21. air guide tube; 22. connecting pipe; 41. holder; 50. installation base; 51. exhaust pipe; 61. spiral blade; 62. electromagnet; 70. liquid guide port; 71. liquid replenishment port; 72. limit plate; 73. bending spring; 74. movable baffle; 80. heat exchange channel; 81. trapezoidal table; 82. heat transfer 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 DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Embodiment 1, refer to Figure 1-Figure 5, an energy-saving electrical equipment control cabinet, including a cabinet 1, a side wall of the cabinet 1 is provided with a ventilation groove and a rain shielding eave 11, the rain shielding eave 11 is fixedly arranged on the outside of the ventilation groove, the rain shielding eave 11 can prevent rainwater from entering the ventilation groove, and protect the internal equipment of the cabinet 1 from rainwater damage, a temperature sensor 20 is installed on the top of the cabinet 1, the probe of the temperature sensor 20 extends into the cabinet 1, the temperature sensor 20 is used to monitor the internal temperature of the cabinet 1, and a circulation fan 2 and an exhaust fan 3 are installed on the side wall of the cabinet 1 near the top of the cabinet 1, and also includes:

[0037] Circulating cooling component: The circulating cooling component is arranged on the top and inner side of the cabinet 1;

[0038] Trigger cooling component: The trigger cooling component is arranged inside the circulating cooling component;

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

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

[0041] Two sockets 41 are fixedly installed on the inner wall of the cabinet 1 corresponding to the rain shelter 11. The two sockets 41 are symmetrically distributed. A dustproof net 4 is movably installed between the two sockets 41. The dustproof net 4 can cover all the air grooves. The dustproof net 4 can prevent dust from entering the interior of the cabinet 1 through the air grooves. 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 is convenient for disassembly and assembly of the dustproof net 4.

[0042] Furthermore, the circulating cooling component includes an air duct 21, a connecting pipe 22, a mounting base 50 and an exhaust duct 51. The mounting base 50 is fixed on the top of the cabinet 1. An installation box 5 is fixedly arranged on the mounting base 50. An air inlet cavity 6 and a liquid nitrogen storage cavity 7 are arranged inside the mounting box 5. The air duct 21 is fixedly arranged on the outer wall of the cabinet 1 and is directly opposite to the circulating fan 2, and is used to guide the flow direction of the wind blown by the circulating fan 2. One end of the connecting pipe 22 is connected to the air duct 21, and the other end is connected to the left side of the air inlet cavity 6. The connecting pipe 22 guides the wind blown by the circulating fan 2 into the air inlet cavity 6. The side of the air inlet cavity 6 away from the connecting pipe 22 is connected with the exhaust duct 51. The lower end of the exhaust duct 51 passes through the top wall of the cabinet 1 and extends to the interior of the cabinet 1. The treated gas re-enters the interior of the cabinet 1 through the exhaust duct 51 to complete the gas cooling cycle.

[0043] A filter plate 8 is slidably connected in the air inlet chamber 6 located at the bottom of the liquid nitrogen storage chamber 7. The filter plate 8 is elastically connected to the left inner wall of the installation box 5 by a spring 83. A plurality of heat exchange channels 80 are arranged in the filter plate 8. A plurality of heat conducting rods 82 are fixedly connected to the side wall of the filter plate 8 near the spring 83. The end of the heat conducting rod 82 passes through the left wall of the installation box 5 and extends to the outside of the installation box 5. The arrangement of the heat conducting rod 82 makes the movement of the filter plate 8 more stable on the one hand, and is conducive to transferring heat to the outside on the other hand. The heat conducting rod 82 can effectively guide the heat accumulated on the filter plate 8 through its exposed part. A water retaining plate 511 is fixedly installed inside the exhaust pipe 51 near the installation box 5. The filter plate 8 is a magnetic light plate. When the circulation fan 2 rotates to generate gas thrust, the filter plate 8 moves in the air inlet chamber 6 and changes its position to participate in the subsequent triggering cooling process.

[0044] It should be noted that high thermal conductivity particles, such as metal (such as silver, copper, etc.) or ceramic (such as aluminum oxide, boron nitride, etc.) particles, are provided on the surfaces of the filter plate 8 and the heat-conducting rod 82 and the heat-exchange channel 80, which have a higher thermal conductivity than the base material of the filter plate 8 and the heat-conducting rod 82. The provision of these particles on the surfaces of the filter plate 8 and the heat-conducting rod 82 and the heat-exchange channel 80 is equivalent to constructing a large number of efficient heat conduction "highways" inside the material. When heat is transferred to the area containing high thermal conductivity particles, due to the high thermal conductivity of the particles, the heat can be conducted more quickly through the particles, thereby reducing thermal resistance. For example, the thermal conductivity of silver particles is as high as 429W / (m· K), which is much higher than that of general metal or non-metal materials. After the silver particles are distributed on the surface of the filter plate 8, the heat can diffuse rapidly along the silver particles, which greatly improves the heat conduction efficiency of the filter plate 8. When the hot air contacts the heat exchange channel 80 of the filter plate 8, the heat can be transferred to the inside of the filter plate 8 and the heat conducting rod 82 through a path composed of multiple high thermal conductivity particles, and then transferred to the outside, thereby improving the overall heat conduction capacity, and can exchange heat with the hot air entering through the connecting pipe 22. There is a gap between the water baffle 511 and the top of the inner wall of the exhaust pipe 51, and the water baffle 511 can prevent possible condensed water and other liquids from entering 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 circulation fan 2 and the exhaust fan 3 and the monitoring value is positively correlated with the fan speed, the speed of the circulation fan 2 and the exhaust fan 3 will be accelerated accordingly. The speed of the circulation fan 2 will be accelerated, the amount of air blown out will increase, and the force to push the air will be stronger.

[0046] The wind blown out by the circulation fan 2 enters the air inlet chamber 6 along the connecting pipe 22 under the guidance of the air guide tube 21. The air guide tube 21 plays a role in directional guiding of the airflow, ensuring that the wind blown out by the circulation 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 air inlet chamber 6 will push the filter plate 8 to slide in the air inlet chamber 6 due to the gas thrust generated by the circulation fan 2. The filter plate 8 is elastically connected to the inner wall of the left side of the installation box 5 through a spring 83. Under the push of the airflow, it overcomes the elastic force of the spring 83 and moves to the right. At the same time, a number of heat exchange channels 80 arranged in the filter plate 8 begin to play a role. Because the filter plate 8 and the surface of the heat-conducting rod 82 and the heat exchange channel 80 are all provided with high thermal conductivity particles, they can fully exchange heat with the hot air passing through.

[0048] The heat exchange channel 80 in the filter plate 8 is the area in direct contact with the hot air. The presence of high thermal conductivity particles enables the channel wall to absorb the heat of the hot air more quickly. When the hot air passes through the heat exchange channel 80, the heat is quickly transferred to the high thermal conductivity particles on the channel wall, and then transferred to the entire filter plate 8, so that the temperature of the hot air is reduced more quickly. This is very important for quickly cooling the hot air entering the air inlet chamber 6, which helps to improve the cooling efficiency of the entire circulating cooling system and more effectively reduce the temperature inside the cabinet 1; the high thermal conductivity particles not only accelerate the absorption of the heat of 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 passes through the heat conduction network composed of high thermal conductivity particles. The heat can quickly diffuse 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 heat-conducting rod 82 connected thereto 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 installation 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 conduction of heat inside the heat-conducting rod 82, so that the heat is transferred from one end of the heat-conducting rod 82 to the other end more quickly and dissipated into the external environment. This helps to improve the efficiency of the heat-conducting rod 82 in extracting heat, ensure that the heat absorbed by the filter plate 8 can be discharged in a timely and effective manner, and maintain 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, so that it is not easy to shake during the sliding process; on the other hand, it effectively conducts heat to the external environment, thereby reducing the temperature in the filter plate 8 and the air inlet chamber 6; the presence of high thermal conductivity particles can enable the heat-conducting rod 82 to maintain a high thermal conductivity at different positions, and even when the filter plate 8 moves and causes the heat-conducting rod 82 to be stressed or its position to change to a certain extent, the stability of its thermal conductivity performance can be guaranteed, which is of great significance for the continuous and stable operation of the entire circulating cooling component, and avoids affecting the heat dissipation effect of the entire system due to the decrease in the thermal conductivity performance of the heat-conducting rod 82.

[0050] The air after heat exchange through the filter plate 8 re-enters the cabinet 1 from the air inlet chamber 6 through the exhaust pipe 51. In the process of air entering the cabinet 1, the water baffle 511 prevents condensed water and other liquids that may be generated by temperature changes from entering the cabinet 1, thereby avoiding damage to electrical equipment.

[0051] In the prior art, the air flow is accelerated only by the fan, and the heat exchange between the hot air and the external environment is mainly achieved through natural convection and fan forced convection, and the heat exchange efficiency is relatively limited. The present application provides a filter plate 8 with a heat exchange channel 80 and high thermal conductivity particles on the surface and in the channel. When the hot air passes through the heat exchange channel 80, the high thermal conductivity particles greatly enhance the heat conduction efficiency between the filter plate 8 and the hot air, and can absorb the heat of the hot air more quickly, so that the temperature of the hot air is reduced faster. For example, under the same hot air flow and temperature conditions, the system with the filter plate 8 with high thermal conductivity particles can reduce the temperature of the hot air to a greater extent, and can more effectively reduce the internal temperature of the cabinet 1 compared with direct fan heat dissipation.

[0052] In addition, the heat dissipation effect of the fan is greatly affected by factors such as ambient temperature and air flow resistance. When the external environment changes, the heat dissipation effect may fluctuate greatly. The high thermal conductivity particles set on the filter plate 8 and the surface of the heat-conducting rod 82 and the heat exchange channel 80 in the present application can ensure that a high and stable thermal conductivity performance can be maintained under different working conditions. Even when the ambient temperature changes or the air flow state changes, heat can still be effectively transferred to ensure the stability of the heat dissipation effect. For example, when the ambient temperature suddenly rises, direct fan heat dissipation may cause the heat dissipation effect to deteriorate 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 the heat conduction enhanced by high thermal conductivity particles.

[0053] The temperature sensor 20 automatically adjusts the rotation speed of the circulation fan 2 and the exhaust fan 3 according to the temperature, thereby 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 the purpose of 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, thereby improving the heat exchange efficiency. The heat conducting rod 82 not only assists in heat dissipation, but also ensures the stability of the movement of the filter plate 8 in the air inlet chamber 6. This stability helps to maintain the normal operation of the entire circulating cooling assembly, avoids problems such as component damage or gas leakage caused by the shaking of the filter plate 8, and improves the reliability and service life of the equipment. The entire circulating cooling assembly is arranged on the top and inner side of the cabinet 1, with a compact layout, making full use of the space of the cabinet 1, and facilitating the connection and coordinated work between the various components.

[0054] Example 2, refer to Figure 5-Figure 8 The trigger cooling component includes a trapezoidal platform 81, a spiral blade 61, a limit plate 72, a bending spring 73, a movable baffle 74, and a liquid guide port 70 opened on the inner bottom wall of the liquid nitrogen storage chamber 7. The spiral blade 61 is fixedly arranged inside the air inlet chamber 6 and is located on the right side of the liquid nitrogen storage chamber 7. The liquid nitrogen storage chamber 7 is filled with liquid nitrogen. Liquid nitrogen is a liquid with an extremely low temperature (boiling point is -196°C). When liquid nitrogen is introduced into the control cabinet cooling system, it will vaporize 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 about 200 joules when vaporized. Heat, which makes it have a high cooling efficiency when cooling the electrical equipment control cabinet. The limit plate 72 is fixed on the inner bottom wall of the liquid nitrogen storage chamber 7. The liquid guide port 70 is composed of an intermediate layer and a through port. The through port runs through 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 limit plate 72 through a bending spring 73. The bottom wall of the movable baffle 74 is fixedly connected with a connecting plate 741 and a sealing plug matching the through port. The end of the connecting plate 741 is fixedly connected with a sphere 742. The trapezoidal platform 81 is arranged on the top of the filter plate 8 and faces the side of the sphere 742.

[0055] It should be noted that a liquid replenishing port 71 for replenishing liquid nitrogen is connected to the top of the installation box 5 corresponding to the liquid nitrogen storage chamber 7, and is used to replenish 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 air inlet chamber 6, pushing the filter plate 8 to slide in the air inlet chamber 6, the heat exchange channel 80 on the filter plate 8 exchanges heat with the hot air, and preliminarily cools the air. The gas thrust generated by the rotation of the circulating fan 2 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. When the trapezoidal platform 81 contacts the sphere 742, the movable baffle 74 can be lifted up through the sphere 742 through the action of its inclined surface, 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 inlet chamber 6 through the connecting pipe 22, pushing the filter plate 8 to slide in the air inlet chamber 6, and the heat exchange channel 80 on the filter plate 8 exchanges heat with the hot air to preliminarily cool the air.

[0057] Reference Figure 7-Figure 8 As the temperature in the cabinet 1 increases, the speed of the circulation fan 2 increases, and the thrust of the gas generated increases, further pushing the filter plate 8 to move in the air inlet chamber 6. When the filter plate 8 moves to a certain position, the trapezoidal platform 81 on its top contacts the sphere 742. As the filter plate 8 continues to move, the trapezoidal platform 81 pushes the sphere 742, thereby driving 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, so that the sealing plug is separated from the opening of the liquid guide port 70, and the liquid nitrogen in the liquid nitrogen storage chamber 7 flows out through the liquid guide port 70 and enters the air inlet chamber 6.

[0058] The outflowing liquid nitrogen is mixed with the air preliminarily cooled by the filter flow plate 8 in the air inlet chamber 6. The liquid nitrogen vaporizes rapidly and absorbs a large amount of heat, further reducing the air temperature. The function of the spiral blade 61 is to make the air entering the air inlet chamber 6 produce a rotating flow, promote the full mixing of the liquid nitrogen and the air, and improve the cooling efficiency. At the same time, the spiral blade 61 can also intercept moisture or condensed water droplets in the air inlet chamber 6 to promote gas-liquid separation. The cooled air enters the interior of the cabinet 1 through the exhaust pipe 51 to achieve cooling of the interior of the cabinet 1.

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

[0060] The triggered cooling component can automatically control the release of liquid nitrogen according to the temperature change in the cabinet 1 to achieve intelligent cooling. When the temperature rises to a certain level, liquid nitrogen cooling is automatically triggered, and the outflow of liquid nitrogen can be automatically stopped after the temperature drops, thereby avoiding excessive use and waste of liquid nitrogen and improving the energy saving of the cooling system. Even if 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, so that the liquid nitrogen can more effectively absorb the heat of the air, thereby enhancing the cooling effect. Compared with simply relying on fan heat dissipation or simple heat exchange, the internal temperature of the cabinet 1 can be reduced 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 Figure 7-Figure 10 The electromagnetic reset assembly includes an electromagnet 62 and a gas storage heat-conducting shell 9. The gas storage heat-conducting shell 9 is fixed on the lower side of the bottom wall of the liquid nitrogen storage chamber 7 and is close to the liquid guide port 70. The electromagnet 62 is fixedly arranged inside the installation box 5 and is located between the liquid guide port 70 and the gas storage heat-conducting shell 9, which can prevent the filter plate 8 from excessive movement. The internal sliding sealing connection of the gas storage heat-conducting shell 9 is connected with a piston plate 91. The lower side wall of the piston plate 91 and the inner bottom wall of the gas storage heat-conducting shell 9 are elastically connected by a spring 94. The inner bottom wall of the gas storage heat-conducting 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 to ensure 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 heat-conducting shell 9.

[0062] It should be noted that the thermal conductivity of the gas storage heat-conducting shell 9 is high (especially, when the liquid nitrogen does not flow out, the temperature change of the gas in the air inlet chamber 6 is relatively limited, and the temperature change of the hot air in the air inlet chamber 6 has little effect on the volume of the gas in the gas storage heat-conducting shell 9). When the liquid nitrogen flows out, the high-pressure nitrogen in the gas storage heat-conducting shell 9 will shrink when it is cold, and the trigger switch 93 is electrically connected to the electromagnet 62. When the trigger switch 93 is squeezed, the electromagnet 62 is energized. When the electromagnet 62 is energized, the opposite surface of the electromagnet 62 and the filter plate 8 have the same polarity. At this time, under the action of the magnetic force, the filter plate 8 will move to the left, the trapezoidal platform 81 will no longer contact the sphere 742, and the liquid guide port 70 will be re-blocked. The pressure block 92 and the trigger switch 93 are both located on the inner side of the spring 94. In the initial state, there is a gap between the pressure block 92 and the trigger switch 93, and the spring 94 is in a stretched state. When the spring 94 is in the initial state, the pressure block 92 is in contact with the trigger switch 93 (refer to Fig.10 ), when the volume of gas in the gas storage heat-conducting shell 9 is reduced, under the action of the spring 2 94, the pressure block 92 will contact the trigger switch 93.

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

[0064] Since the thermal conductivity of the gas storage heat-conducting shell 9 is high, when the liquid nitrogen flows out from the liquid conducting port 70, the liquid nitrogen undergoes a phase change from liquid to gas. This process absorbs a large amount of heat, thereby rapidly reducing the ambient temperature. Because the gas storage heat-conducting shell 9 is close to the liquid conducting port 70, the low-temperature environment generated by the phase change of the liquid nitrogen will rapidly absorb heat from the high-pressure nitrogen in the gas storage heat-conducting shell 9.

[0065] According to the ideal gas state equation PV=nRT (where P is pressure, V is volume, n is the amount of substance, R is the ideal gas constant, and T is temperature), when the temperature T of the high-pressure nitrogen in the gas storage heat-conducting shell 9 decreases, under the condition that the amount of substance n remains unchanged, the pressure P remains unchanged temporarily (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 the gas molecules and reduces the distance between the molecules, thereby reducing the volume of the gas; the reduction in the gas volume in the gas storage heat-conducting shell 9 will reduce the gas pressure on the piston plate 91, and the original piston plate 91 will be reduced. The plate 91 is in a balanced state, and is subjected to the upward gas pressure and the downward elastic force of the spring 2 94. When the gas pressure decreases, the elastic force of the spring 2 94 will prevail, pushing the piston plate 91 to move downward. The downward movement of the piston plate 91 drives the pressure block 92 to move together, so that the pressure block 92 gradually approaches the trigger switch 93. The transmission of this movement is a continuous process. As the gas volume further decreases, the pressure block 92 will eventually squeeze the trigger switch 93. When the pressure block 92 squeezes the trigger switch 93, the working state of the electromagnet 62 will change, thereby controlling the position of the filter plate 8.

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

[0067] By capturing the low temperature generated when the liquid nitrogen flows out, utilizing the thermal expansion and contraction characteristics of the high-pressure nitrogen in the gas storage heat-conducting shell 9, and cooperating with the pressure block 92 and the trigger switch 93, the on and off of the electromagnet 62 is controlled to achieve control of the position of the filter plate 8, and finally adjusting the opening and closing of the liquid guide port 70 to determine whether the liquid nitrogen continues to flow out. This ensures that the cooling process is closely aligned with the actual temperature requirements in the cabinet 1, avoids excessive or insufficient use of liquid nitrogen, maintains the stability of the temperature in 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 circulation fan 2, and the exhaust fan 3 need to be selected and determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in the field, so it will not be described in detail.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An energy-saving electrical equipment control cabinet, comprising a cabinet (1), the side wall of the cabinet (1) is provided with a ventilation groove and a rain shielding eave (11), the rain shielding eave (11) is fixedly arranged on the outside of the ventilation groove, a temperature sensor (20) is installed on the top of the cabinet (1), the probe of the temperature sensor (20) extends into the cabinet (1), and a circulation fan (2) and an exhaust fan (3) are installed on the side wall of the cabinet (1) near the top of the cabinet (1), characterized in that: Also includes: Circulating cooling component: the circulating cooling component is arranged on the top and inner side of the cabinet (1); Trigger cooling component: the trigger cooling component is arranged inside the circulating cooling component; Electromagnetic reset assembly: The electromagnetic reset assembly is arranged inside the circulating cooling assembly.

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

3. The energy-saving electrical equipment control cabinet according to claim 1, characterized in that: Two clamping seats (41) are fixedly mounted on the inner side wall of the cabinet (1) corresponding to the rainproof eaves (11), the two clamping seats (41) are symmetrically distributed, and a dustproof net (4) is movably mounted between the two clamping seats (41), the dustproof net (4) can cover all the ventilation slots, and 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: The circulating cooling assembly comprises an air guide tube (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); a mounting box (5) is fixedly arranged on the mounting base (50); an air inlet cavity (6) and a liquid nitrogen storage cavity (7) are arranged inside the mounting box (5); the air guide tube (21) is fixedly arranged on the outer wall of the cabinet (1) and directly faces the circulating fan (2); one end of the connecting pipe (22) is connected to the air guide tube (21) and the other end is connected to the left side of the air inlet cavity (6); a side of the air inlet cavity (6) away from the connecting pipe (22) is connected through the exhaust pipe (51); the lower end of the exhaust pipe (51) passes through the top wall of the cabinet (1) and extends to the inside of the cabinet (1).

5. The energy-saving electrical equipment control cabinet according to claim 4, characterized in that: 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 installation box (5) via a spring (83); a plurality of heat exchange channels (80) are provided in the filter plate (8); a plurality of 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 wall of the installation box (5) and extend to the outside of the installation box (5); a water retaining plate (511) is fixedly installed inside the exhaust pipe (51) near the installation box (5); and the filter plate (8) is a magnetic light plate.

6. The energy-saving electrical equipment control cabinet according to claim 5, characterized in that: Highly thermally conductive particles are provided on the surfaces of the filter plate (8) and the heat-conducting rod (82) and the heat exchange channel (80), and a gap exists between the water retaining plate (511) and the top of the inner wall of the exhaust pipe (51).

7. The energy-saving electrical equipment control cabinet according to claim 5, characterized in that: The trigger cooling component comprises a trapezoidal platform (81), a spiral blade (61), a limit plate (72), a bending spring (73), a movable baffle (74), and a liquid guide port (70) provided on the inner bottom wall of the liquid nitrogen storage chamber (7); the spiral blade (61) is fixedly arranged 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 limit plate (72) is fixed on the inner bottom wall of the liquid nitrogen storage chamber (7); the liquid guide port (70) is composed of an intermediate layer and a through port; The through opening penetrates the inner bottom wall of the liquid nitrogen storage chamber (7); the movable baffle (74) is rotatably connected to the middle layer of the liquid guide port (70); the top wall of the movable baffle (74) is elastically connected to the limit plate (72) via a bending spring (73); the bottom wall of the movable baffle (74) is fixedly connected to a connecting plate (741) and a sealing plug matching the through opening; the end of the connecting plate (741) is fixedly connected to a sphere (742); and the trapezoidal platform (81) is arranged on the top of the filter plate (8) and faces the side of the sphere (742).

8. The energy-saving electrical equipment control cabinet according to claim 7, characterized in that: The top of the installation box (5) corresponding to the liquid nitrogen storage chamber (7) is connected through a liquid replenishing 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 in a blocked state. 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).

9. The energy-saving electrical equipment control cabinet according to claim 7, characterized in that: The electromagnetic reset assembly comprises an electromagnet (62) and a gas storage heat-conducting shell (9); the gas storage heat-conducting shell (9) is fixed on the lower side of the bottom wall of the liquid nitrogen storage chamber (7) and close to the liquid guide port (70); the electromagnet (62) is fixedly arranged inside the installation box (5) and located between the liquid guide port (70) and the gas storage heat-conducting shell (9); a piston plate (91) is slidably and sealably connected inside the gas storage heat-conducting shell (9); the lower side wall of the piston plate (91) and the inner bottom wall of the gas storage heat-conducting shell (9) are elastically connected via a second spring (94); the inner bottom wall of the gas storage heat-conducting 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); and the space between the lower side of the piston plate (91) and the gas storage heat-conducting shell (9) is filled with high-pressure nitrogen.

10. An energy-saving electrical equipment control cabinet according to claim 9, characterized in that: The thermal conductivity of the gas storage heat-conducting shell (9) is high, the trigger switch (93) is electrically connected to the electromagnet (62), and when the electromagnet (62) is energized, the opposing surfaces of the electromagnet (62) and the filter plate (8) are magnetically homopolar, the pressure block (92) and the trigger switch (93) are both located on the inner side of the second spring (94), and in an initial state, there is a gap between the pressure block (92) and the trigger switch (93), the second spring (94) is in a stretched state, and when the second spring (94) is in an initial state, the pressure block (92) and the trigger switch (93) are in contact.

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