An inner circulation cooling air duct and sensor temperature control heat dissipation type power distribution cabinet

Abstract

The application relates to the technical field of power distribution cabinets, and discloses a heat dissipation type power distribution cabinet with internal circulation cooling air ducts and sensor temperature control, which solves the problems of traditional power distribution cabinets, such as external circulation heat dissipation, no airtight internal circulation air duct, easy dust and water vapor entry, no intelligent temperature control, heat accumulation in the cabinet accelerating component aging, and easy overheat failure, and the heat dissipation type power distribution cabinet comprises a cabinet body, a base arranged at the bottom of the cabinet body, a cabinet door hinged to the front part of the cabinet body, and a plurality of temperature sensors arranged on the inner wall of the cabinet body; a PLC logic controller is integrated and installed at the position of the cabinet door; an air inlet cavity is arranged at the top of the inside of the cabinet body; and an air outlet cavity is arranged at the bottom of the inside of the cabinet body; the application relies on airtight internal circulation to isolate dust and water vapor from the outside, multiple point sensors cooperate with PLC to realize automatic start-stop adjustment of temperature, a double refrigeration structure greatly improves heat dissipation efficiency, integrated linkage driving reduces motor configuration and operation and maintenance cost, and the problems of local high temperature in the cabinet, component corrosion and aging, and high energy consumption are effectively solved.

Description

Technical Field

[0001] This invention belongs to the field of power distribution cabinet technology, specifically a heat dissipation power distribution cabinet with internal circulation cooling air duct and sensor temperature control. Background Technology

[0002] Distribution cabinets are core power distribution equipment in power systems. They are enclosed cabinets made of cold-rolled steel plates, integrating circuit breakers, busbars, metering instruments, and leakage and short-circuit protection components. They are available in high-voltage and low-voltage versions and are widely used in factories, buildings, residential communities, and municipal engineering projects. They receive power from upstream power lines and distribute electrical energy systematically to various lighting and power branches. Circuit switching can be controlled manually or automatically. During operation, voltage and current parameters are monitored in real time. In case of overload, short circuit, or leakage, power can be quickly cut off, minimizing the fault area and reducing the risk of electric shock and fire. The cabinet's protective structure isolates live components, improving operational safety and facilitating centralized maintenance and zoned management of power supply circuits. They are a crucial hub for ensuring stable power supply, standardized power distribution, and preventing electrical accidents.

[0003] Existing distribution cabinets mostly use external circulation cooling without independent closed internal circulation air ducts. External dust and moisture can easily enter the cabinet with the air intake and corrode the components. They lack temperature sensing and automatic temperature control mechanisms, and the continuous operation of the cooling fans results in high energy consumption. Heat accumulation can easily cause local high temperatures in switches and busbars, accelerate insulation aging, and frequently cause overheating trips, significantly reducing the service life and operational safety of power distribution equipment. Summary of the Invention

[0004] In view of the above situation and to overcome the defects of the prior art, the present invention provides a heat dissipation type power distribution cabinet with internal circulation cooling air duct and sensor temperature control, which effectively solves the problems of the existing traditional power distribution cabinets in the background art that use external circulation cooling, have no sealed internal circulation air duct, are prone to dust and water vapor, have no intelligent temperature control, and have heat accumulation inside the cabinet that accelerates component aging and is prone to overheating failure.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a heat dissipation type power distribution cabinet with internal circulation cooling air duct and sensor temperature control, comprising a cabinet body, a base at the bottom of the cabinet body, a cabinet door hinged to the front of the cabinet body, the cabinet door being locked to the cabinet body by a latch, multiple sets of temperature sensors arranged on the inner wall of the cabinet body, a PLC logic controller integrated at the cabinet door position, an air inlet chamber at the upper part of the cabinet body, an air outlet chamber at the lower part of the cabinet body, a fan blade installed inside the lower opening of the air inlet chamber, a servo motor fixed at the rear of the cabinet body by a mounting bracket, a linkage component installed at the output end of the servo motor, and sleeves fixed sequentially from top to bottom at the rear of the cabinet body. The sleeve is fixedly connected to the cabinet by two sets of support arms. The upper end of the sleeve and the lower end of the sleeve are respectively connected and fixed to the air inlet and air outlet chambers. Multiple sets of stirring blades are installed inside the sleeve. Cooling components are arranged inside the sleeve and the sleeve. During the operation of the servo motor, the fan blades and all stirring blades can be driven to rotate synchronously with the linkage components. The rotating fan blades draw in air to form a closed airflow circulation inside the cabinet. The cooling components continuously cool the circulating airflow. The stirring blades can increase the heat exchange contact area between the airflow and the cooling components, and enhance the overall airflow cooling effect.

[0006] Preferably, a protective net can be detachably installed at the upper opening of the air outlet chamber, and a perforated plate can be detachably installed on the outer side of the lower opening of the air inlet chamber.

[0007] Preferably, the cooling assembly includes two end plates fixedly installed inside the sleeve and a spiral channel fixedly installed at the upper position inside the sleeve. The spiral channel can extend the path length of the airflow through the sleeve and improve the airflow cooling effect. Multiple heat exchange tubes are fixedly arranged between the two end plates, and the two end plates and multiple heat exchange tubes together form a sealed cooling cavity. An inlet pipe and an outlet pipe are fixedly installed at the rear of the sleeve, and both the inlet pipe and the outlet pipe are connected and fixed to the external heat exchanger. Multiple semiconductor cooling chips are installed vertically and equidistantly on the outside of the sleeve. A reducing pipe is installed at the lower end of the sleeve, and the sleeve is connected and fixed to the air outlet cavity by the reducing pipe. The reducing pipe can expand the airflow cross section, reduce the airflow velocity, and extend the residence time of the airflow in the sleeve for heat exchange, so as to achieve sufficient cooling of the airflow.

[0008] Preferably, the linkage assembly includes a drive shaft fixedly mounted on the output end of the servo motor. The drive shaft is rotated and positioned relative to the cabinet by a first bearing. A lower sprocket is fixedly mounted on the end of the drive shaft, and an upper sprocket is mounted above the lower sprocket. The upper sprocket is rotated and positioned relative to the top of the cabinet by a positioning seat. A chain is meshed between the lower sprocket and the upper sprocket. A shaft is connected to one side of the upper sprocket by a first universal joint. The shaft is rotated and positioned relative to the top of the cabinet by a second bearing. A rotating shaft is mounted at the front end of the shaft by a second universal joint. The bottom end of the rotating shaft extends downwards through the air intake chamber and is fixedly connected to the fan blade. The rotating shaft is rotated and positioned relative to the cabinet by a first sealed bearing. The bottom of the rotating shaft forms a rotating connection structure with a first rotating seat and a perforated plate.

[0009] Preferably, a transmission rod is fixedly mounted on the side of the lower sprocket away from the servo motor. One end of the transmission rod extends through the inside of the sleeve and is fixedly mounted with a drive bevel gear. The outer side of the transmission rod is rotated and positioned with the sleeve by a second sealed bearing. A driven bevel gear is meshed with the upper part of the drive bevel gear. A main shaft is fixedly mounted on the top of the driven bevel gear. The top of the main shaft is rotated and positioned by a second rotating seat and the inner wall of the sleeve. All the stirring blades are fixedly mounted on the outer side of the main shaft. The lower end of the main shaft is rotated and positioned with the inner wall of the sleeve by a third bearing.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] ( ) This invention adopts a fully enclosed independent internal circulation air duct structure, in which airflow circulates only inside the cabinet, completely isolating external dust and moisture from entering the cabinet, eliminating the problems of component corrosion and short circuit damage. It is equipped with multi-point temperature sensors and PLC logic controller to realize intelligent start-stop temperature control, abandoning the continuous no-load operation mode of the fan, greatly reducing the long-term energy consumption of the equipment, and simultaneously solving the core defects of traditional power distribution cabinets such as heat accumulation aging and overheating tripping.

[0012] ( ) This invention features a dual cooling structure consisting of a liquid-cooled heat exchange tube and a semiconductor refrigeration chip. It is supplemented by a spiral channel inside the sleeve to extend the airflow heat exchange path. The variable diameter tube slows down the airflow velocity and extends the heat exchange time. Furthermore, the synchronously operating stirring blades disrupt the laminar flow of the airflow and increase the contact area for heat exchange. The multi-layer refrigeration enhancement structure works synergistically to significantly improve the airflow cooling efficiency inside the cabinet and can quickly dissipate the concentrated heat in the busbar and switch areas.

[0013] ( ) This invention relies on a single servo motor combined with an integrated linkage component of chain, universal joint, and bevel gear to synchronously drive the circulating fan blades and the air duct stirring blades to work synchronously, eliminating the need for multiple independent drive motors, reducing equipment procurement costs and the number of potential failure points; the entire transmission structure is equipped with multiple sets of sealed bearings to achieve air duct sealing, preventing cold leakage, and the protective mesh and perforated plate can be quickly disassembled and cleaned, making the air duct less prone to blockage, and making operation and maintenance convenient and simple.

[0014] (4) The present invention has a high degree of overall integration. The base, anti-static and dustproof accessories, variable frequency adjustable servo motor, and temperature and sound and light alarm module are fully equipped. It can be used in high and low voltage power distribution in factories, buildings, municipalities and other scenarios, effectively extending the service life of electrical components inside the power distribution cabinet and improving the long-term operation stability and power safety factor of the power distribution system. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0016] In the attached diagram:

[0017] Figure 1 This is a schematic diagram of the power distribution cabinet structure of the present invention. Figure 1 ;

[0018] Figure 2 This is a schematic diagram of the power distribution cabinet structure of the present invention. Figure 2 ;

[0019] Figure 3 This is a schematic diagram of the power distribution cabinet structure of the present invention. Figure 3 ;

[0020] Figure 4 This is a schematic diagram of the internal structure of the cabinet of the present invention. Figure 1 ;

[0021] Figure 5 This is a schematic diagram of the internal structure of the cabinet of the present invention. Figure 2 ;

[0022] Figure 6 For the present invention Figure 4 Enlarged structural diagram at point C;

[0023] Figure 7 For the present invention Figure 2 Enlarged structural diagram at point A in the middle;

[0024] Figure 8 For the present invention Figure 4 Enlarged structural diagram at point B;

[0025] In the diagram: 1. Cabinet; 2. Base; 3. Cabinet door; 4. Temperature sensor; 5. Air inlet chamber; 6. Air outlet chamber; 7. Protective net; 8. Fan blade; 9. Mounting bracket; 10. Servo motor; 11. Sleeve; 12. Tubing; 13. Reducer; 14. End plate; 15. Heat exchanger tube; 16. Liquid inlet pipe; 17. Liquid outlet pipe; 18. Spiral channel; 19. Stirring blade; 20. Semiconductor refrigeration chip; 21. Orifice plate; 22. Support arm; 23. Drive... 24. Drive shaft; 25. First shaft seat; 26. Lower sprocket; 27. Chain; 28. Upper sprocket; 29. ​​Positioning seat; 30. First universal joint; 31. Shaft; 32. Second shaft seat; 33. Second universal joint; 34. Rotating shaft; 35. First sealed bearing; 36. Transmission rod; 37. Second sealed bearing; 38. Driving bevel gear; 39. Driven bevel gear; 40. Third shaft seat; 41. Main shaft; 42. Second rotating seat. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0027] Example 1, by Figure 1 , Figure 2 , Figure 3 and Figure 4 The present invention includes a cabinet 1, with a base 2 fixedly installed at the bottom of the cabinet 1. The base 2 raises the overall height of the cabinet 1 to prevent ground moisture from directly contacting the bottom of the cabinet 1. A cabinet door 3 is hinged to the front edge of the cabinet 1. A latch is provided on the side of the cabinet door 3. After the cabinet door 3 is closed, the latch locks the cabinet door 3 to the cabinet 1, preventing the cabinet door 3 from being accidentally opened and causing safety hazards. Multiple sets of temperature sensors 4 are evenly distributed on the inner walls of the left and right sides of the cabinet 1. The multiple sets of temperature sensors 4 correspond to the electrical component installation areas in the upper, middle and lower parts of the cabinet 1, respectively, to collect real-time temperature data at multiple points. A PLC logic controller is integrated and fixed on the inner panel of the cabinet door 3. All temperature sensors 4 are electrically connected to the PLC logic controller through signal lines. The PLC logic controller is synchronously electrically connected to a servo motor 10. The PLC logic controller has a built-in preset temperature threshold. When the collected temperature is higher than the set upper limit, the servo motor 10 is automatically started; when the temperature is lower than the set lower limit, the servo motor 10 is automatically stopped, realizing intelligent temperature control and energy-saving operation.

[0028] An air inlet chamber 5 is integrally formed in the upper part of the cabinet 1, and an air outlet chamber 6 is integrally formed in the lower part of the cabinet 1. A through opening is formed on the lower side of the air inlet chamber 5, and a fan blade 8 is installed in the center of the opening. When the fan blade 8 rotates, it draws the high-temperature airflow inside the cabinet 1 downward and sends it into the air inlet chamber 5. A mounting bracket 9 is fixedly welded to the outer side of the rear wall of the cabinet 1. A servo motor 10 is horizontally fixed on the mounting bracket 9. A linkage component is installed with the output end of the servo motor 10 facing forward. The linkage component synchronously drives the fan blade 8 and the stirring blade 19 to rotate synchronously.

[0029] A sleeve 11 and a tube 12 are vertically fixed to the rear wall of cabinet 1 from top to bottom. The tube 12 is welded to the rear wall of cabinet 1 via support arms 22, which stably support the tube 12. The upper end of the sleeve 11 is welded to the rear end of the air inlet chamber 5. A reducer 13 is installed at the lower end of the tube 12. The lower end of the reducer 13 is welded to the rear end of the air outlet chamber 6. Multiple sets of stirring blades 19 are vertically arranged inside the tube 12. A cooling assembly is assembled inside the sleeve 11 and tube 12. After the servo motor 10 starts running... Power is synchronously transmitted to the fan blades 8 and all the stirring blades 19 via the linkage components. The fan blades 8 draw in the hot airflow inside the cabinet 1 into the air intake chamber 5. Then the airflow flows from top to bottom through the sleeve 11, the sleeve 12, and the reducer 13, and finally flows into the air outlet chamber 6 and back to the bottom of the cabinet 1, forming a complete closed internal circulation airflow loop. The cooling components continuously exchange heat and cool the hot airflow throughout the entire process. The rotating stirring blades 19 inside the sleeve 12 continuously agitate the internal airflow, breaking up the laminar flow state of the airflow, increasing the contact area between the airflow and the cooling components, and greatly improving the heat exchange and cooling effect.

[0030] An upward-facing through-hole is opened on the upper side of the air outlet chamber 6. A protective net 7 can be detachably attached to the opening. The protective net 7 has a metal mesh structure, which can prevent debris from falling off electrical components inside the cabinet 1 from entering the air duct and causing pipe blockage. The protective net 7 has no additional fasteners and is directly snapped in place. Maintenance personnel can remove it by hand to clean up debris. A perforated plate 21 can be detachably attached to the lower opening of the air inlet chamber 5. The surface of the perforated plate 21 has dense and fine through holes, which evenly disperse the airflow drawn by the fan blades 8 and avoid excessive local airflow velocity, which can cause excessive local temperature difference inside the cabinet. The perforated plate 21 also adopts a snap-on detachable structure, which is convenient for regular disassembly and cleaning of the dust inside the through holes.

[0031] Depend on Figure 4 , Figure 5 and Figure 6The cooling assembly includes two end plates 14 horizontally fixed inside the sleeve 11 and a spiral channel 18 integrally formed and positioned above the inside of the sleeve 12. The spiral channel 18 extends spirally downward along the inner wall of the sleeve 12, extending the airflow path inside the sleeve 12, prolonging the heat exchange time and improving the cooling effect. The two end plates 14 are arranged parallel to each other vertically and spaced apart. Multiple heat exchange tubes 15 are vertically fixed between the two end plates 14. The two end plates 14 and all the heat exchange tubes 15 together form a sealed cooling cavity. The outer side of the rear wall of the sleeve 11 is fixedly connected to the liquid inlet pipe 16 and the liquid outlet pipe 17. The other end of the liquid inlet pipe 16 and the liquid outlet pipe 17 are both connected to an external circulating heat exchanger. The low-temperature coolant is sent into the cooling cavity between the two end plates 14 through the liquid inlet pipe 16. After the coolant absorbs the heat of the airflow through all the heat exchange tubes 15, it flows back to the external heat exchanger through the liquid outlet pipe 17 to cool down again. The continuous circulation realizes liquid cooling heat exchange.

[0032] Multiple semiconductor cooling chips 20 are vertically and equidistantly attached to the outer wall of the sleeve 12. The cold end of the semiconductor cooling chip 20 is attached to the outer wall of the sleeve 12. During operation, it continuously absorbs the heat of the airflow inside the sleeve 12, forming a dual cooling structure with the liquid-cooled heat exchange tube 15 inside the sleeve 11. The lower end of the sleeve 12 is connected to and installed with a reducing pipe 13. The reducing pipe 13 adopts a tapered structure that is wider at the top and narrower at the bottom. When the airflow flows from the sleeve 12 into the reducing pipe 13, the flow cross section becomes smaller, which hinders the flow speed of the airflow and prolongs the heat exchange time of the airflow inside the cooling pipe, ensuring that the airflow is fully cooled before flowing back to the outlet chamber 6.

[0033] Depend on Figure 6 , Figure 7 and Figure 8 The linkage assembly includes a drive shaft 23 horizontally fixedly mounted on the output end of a servo motor 10. A first bearing seat 24 is sleeved on the outside of the drive shaft 23. The outside of the first bearing seat 24 is welded and fixed to the rear wall of the cabinet 1. The drive shaft 23 is horizontally rotated and positioned by the first bearing seat 24. A lower sprocket 25 is fixedly mounted on the end of the drive shaft 23 away from the servo motor 10. An upper sprocket 27 is vertically mounted above the lower sprocket 25. A positioning seat 28 is welded and fixed to the top rear wall of the cabinet 1. The upper sprocket 27 is rotatably mounted inside the positioning seat 28. The upper sprocket 27 is rotated and positioned by the positioning seat 28. A chain 26 is sleeved on the outside of the lower sprocket 25 and the upper sprocket 27. The servo motor 10 drives the drive shaft 23 and the lower sprocket 25 to rotate. The lower sprocket 25 drives the upper sprocket 27 to rotate synchronously by the chain 26.

[0034] One end face of the upper sprocket 27 is horizontally connected to the shaft 30 via the first universal joint 29. The outer side of the shaft 30 is fitted with a second bearing 31, which is welded and fixed to the inner wall of the top of the cabinet 1. The shaft 30 is horizontally and stably rotated by the second bearing 31. The front end face of the shaft 30 away from the first universal joint 29 is vertically connected to the rotating shaft 33 via the second universal joint 32. The rotating shaft 33 extends vertically downward through the top plate of the cabinet 1 and into the air intake chamber 5. The bottom end of the rotating shaft 33 is fixedly connected to the center of the fan blade 8. When the upper sprocket 27 rotates, the power is transmitted to the rotating shaft 33 in sequence through the first universal joint 29, the shaft 30, and the second universal joint 32, ultimately driving the fan blade 8 to rotate continuously.

[0035] The first sealing bearing 34 is fitted into the position where the rotating shaft 33 passes through the top plate of the cabinet 1. The first sealing bearing 34 is used to achieve rotational sealing between the rotating shaft 33 and the top plate of the cabinet 1, preventing the airflow inside the duct from leaking out through the gap and damaging the sealed internal circulation structure. The bottom of the rotating shaft 33 is fitted with the first rotating seat 35. The bottom of the first rotating seat 35 is fixed at the center of the perforated plate 21. The bottom of the rotating shaft 33 is supported by the first rotating seat 35, which reduces the vibration amplitude when the rotating shaft 33 rotates at high speed and improves the operating stability of the fan blade 8.

[0036] A transmission rod 36 is horizontally fixedly mounted on the side of the lower sprocket 25 away from the servo motor 10. The transmission rod 36 extends horizontally inward through the rear wall of the cabinet 1 and into the sleeve 12. A second sealing bearing 37 is fitted onto the position where the transmission rod 36 penetrates the sleeve 12 wall. The second sealing bearing 37 is used to achieve a rotational seal between the transmission rod 36 and the sleeve 12 wall, preventing the leakage of cold air from the inside of the sleeve 12. A drive bevel gear 38 is fixedly installed at the end of the transmission rod 36 that extends into the sleeve 12. When the lower sprocket 25 rotates, it synchronously drives the transmission rod 36 and the drive bevel gear 38 to rotate synchronously.

[0037] A driven bevel gear 39 is vertically meshed above the driving bevel gear 38. The main shaft 41 is vertically fixed at the center of the top surface of the driven bevel gear 39. A second rotating seat 42 is welded and fixed to the top of the inner wall of the sleeve 12. The top of the main shaft 41 is rotatably mounted inside the second rotating seat 42. All stirring blades 19 are vertically and evenly fixed on the outer side of the main shaft 41. A third shaft seat 40 is sleeved and mounted at the lower end of the main shaft 41. The third shaft seat 40 is fixed to the lower part of the inner wall of the sleeve 12. The main shaft 41 is vertically rotated and positioned by the second rotating seat 42 and the third shaft seat 40. The driving bevel gear 38 drives the driven bevel gear 39 to rotate vertically. The driven bevel gear 39 synchronously drives the main shaft 41 and all stirring blades 19 to rotate continuously and stir the airflow inside the sleeve 12.

[0038] In Example 2, based on Example 1, the PLC logic controller can adjust the power supply of the semiconductor cooling chip 20 according to the real-time temperature inside the cabinet. The semiconductor cooling chip 20 operates at full power in the high-temperature range, and reduces the power output when the temperature approaches the lower threshold, further reducing energy consumption. A dustproof protective cover can be added to the outside of the transmission components. The protective cover is fixed to the outside of the cabinet 1 and completely covers the exposed transmission components to prevent dust from adhering to the transmission components and causing transmission jamming, thus extending the service life. The PLC logic controller is equipped with an audible and visual alarm module. When the temperature collected by multiple temperature sensors 4 exceeds the safety limit for three minutes without decreasing, the audible and visual alarm module will automatically start to remind maintenance personnel to check the heat dissipation system of the power distribution cabinet in time.

[0039] Both the protective mesh 7 and the perforated plate 21 are coated with an anti-static coating to prevent dust from being attracted by static electricity during high-speed airflow, thus reducing the rate of dust accumulation in the air duct and extending the cleaning cycle. The servo motor 10 is a variable frequency servo motor, and the PLC logic controller can adjust the output speed of the servo motor 10 according to the temperature difference inside the cabinet. Under high-temperature conditions, the speed is increased to accelerate airflow circulation, and under low-temperature conditions, the speed is reduced to reduce energy consumption and equipment noise. All sealed bearings are filled with high-temperature resistant grease on the outside, which is suitable for the long-term high-temperature operation of the distribution cabinet, reduces bearing wear and abnormal noise, and extends the maintenance cycle of the entire transmission component.

[0040] Working principle: When the equipment is powered on, multiple temperature sensors 4 on the inner wall of the cabinet 1 collect temperature data of different areas inside the cabinet in real time and transmit it to the PLC logic controller on the cabinet door 3. The PLC logic controller compares the built-in temperature threshold to make an intelligent judgment. When the temperature inside the cabinet is higher than the preset upper limit, the PLC logic controller automatically starts the servo motor 10. The output of the servo motor 10 drives the drive shaft 23 and the lower sprocket 25 to rotate synchronously. The lower sprocket 25 drives the upper sprocket 27 to rotate synchronously through the chain 26. The upper sprocket 27 drives the rotating shaft 33 and the fan blade 8 to rotate at high speed through the first universal joint 29, the shaft 30, and the second universal joint 32. The fan blade 8 draws down the high-temperature airflow accumulated inside the cabinet 1. The hot airflow passes through the perforated plate 21 and is evenly dispersed before entering the air inlet chamber 5. Then it flows from top to bottom into the sleeve 11. The liquid cooling chamber composed of the two end plates 14 and the heat exchange tube 15 inside the sleeve 11 is continuously supplied with low-temperature coolant. The high-temperature airflow flows through the outer wall of the heat exchange tube 15 to complete the initial cooling.

[0041] The airflow continues to flow downwards into the sleeve 12. The semiconductor cooling chip 20 on the outer wall of the sleeve 12 continuously absorbs heat from the tube wall. The spiral channel 18 inside the sleeve 12 extends the airflow path. Simultaneously, the lower sprocket 25 drives the transmission rod 36 and the active bevel gear 38 to rotate. The active bevel gear 38 meshes and drives the driven bevel gear 39, the main shaft 41, and all the stirring blades 19 to rotate continuously. The stirring blades 19 continuously stir the airflow inside the sleeve 12, breaking up the static airflow layer and allowing the airflow to fully contact the inner wall of the sleeve 12 to complete the secondary deep cooling. The cooled airflow flows downwards into the reducer pipe 13. The reducer pipe 13 reduces the flow cross section to obstruct the airflow and prolong the heat exchange time. Finally, the low-temperature airflow flows upwards through the outlet chamber 6 back to the bottom of the cabinet 1. It flows from bottom to top through all the electrical components in the cabinet, absorbs the heat generated by the operation of the components, and is then drawn back into the air duct by the fan blades 8, forming an uninterrupted closed internal circulation heat dissipation circuit.

[0042] When the temperature inside the cabinet collected by multiple temperature sensors 4 is lower than the preset lower limit value of the PLC logic controller, the PLC logic controller automatically cuts off the power supply to the servo motor 10, and the entire internal circulation cooling system stops operating, avoiding ineffective heat dissipation and energy waste. The entire airflow circulation is completely enclosed inside the sealed air duct composed of cabinet 1, air inlet chamber 5, sleeve 11, sleeve 12, and air outlet chamber 6. External dust and moisture cannot enter the cabinet 1, thus preventing component corrosion failure from the root. During daily operation and maintenance, staff can directly disassemble the protective net 7 above the air outlet chamber 6 and the outer perforated plate 21 of the air inlet chamber 5 to quickly clean the dust and component debris accumulated inside the air duct, ensuring long-term smooth air circulation.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An internal circulation cooling air duct and sensor temperature control heat dissipation type power distribution cabinet, comprising a cabinet body (1), characterized in that: The cabinet (1) has a base (2) at the bottom and a cabinet door (3) hinged to the front of the cabinet (1). The cabinet door (3) is locked to the cabinet (1) by a latch. The inner wall of the cabinet (1) is provided with multiple temperature sensors (4). The cabinet door (3) is integrated with a PLC logic controller. An air inlet chamber (5) is opened in the upper part of the cabinet (1). An air outlet chamber (6) is opened in the lower part of the cabinet (1). A fan blade (8) is provided in the lower opening of the air inlet chamber (5). A servo motor (10) is mounted on the rear of the cabinet (1) by a mounting bracket (9). A linkage component is provided at the output end of the servo motor (10). The rear of the cabinet (1) is fixed with a sleeve (11) and a tube (12) from top to bottom. The tube (12) is fixed to the cabinet (1) by two support arms (22). The upper end of the sleeve (11) and the lower end of the tube (12) are fixedly connected to the air inlet chamber (5) and the air outlet chamber (6) respectively. The tube (12) is provided with multiple stirring blades (19). The sleeve (11) and the tube (12) are provided with cooling components. When the servo motor (10) is running, it can drive the fan blade (8) and several stirring blades (19) to rotate synchronously through the linkage component, so that the fan blade (8) can draw airflow for internal circulation. The cooling component can effectively cool the internal circulation airflow. The mixing with the stirring blades (19) can improve the cooling effect of the airflow.

2. The heat dissipation type power distribution cabinet with internal circulation cooling air duct and sensor temperature control according to claim 1, characterized in that: A protective net (7) can be detachably installed at the upper opening of the air outlet chamber (6), and a perforated plate (21) can be detachably installed outside the lower opening of the air inlet chamber (5).

3. The heat dissipation type power distribution cabinet with internal circulation cooling air duct and sensor temperature control according to claim 1, characterized in that: The cooling assembly includes two end plates (14) fixed inside the sleeve (11) and a spiral channel (18) fixed inside the upper side of the sleeve (12). The spiral channel (18) can improve the cooling effect of the airflow. Several heat exchange tubes (15) are fixed between the two end plates (14). A sealed cooling space is formed between the two end plates (14) and the several heat exchange tubes (15). An inlet pipe (16) and a drain pipe (17) are fixed at the rear of the sleeve (11). The inlet pipe (16) and the drain pipe (17) are both fixedly connected to the external heat exchanger.

4. The heat dissipation type power distribution cabinet with internal circulation cooling air duct and sensor temperature control according to claim 1, characterized in that: The sleeve (12) is vertically and equidistantly equipped with several semiconductor cooling chips (20), and the lower end of the sleeve (12) is fixedly connected to the air outlet (6) through a variable diameter pipe (13). The variable diameter pipe (13) can reduce the flow rate of the airflow and make the airflow fully cooled.

5. The heat dissipation type power distribution cabinet with internal circulation cooling air duct and sensor temperature control according to claim 1, characterized in that: The linkage component includes a drive shaft (23) fixed to the output end of the servo motor (10). The drive shaft (23) is rotated and positioned with the cabinet (1) through the first shaft seat (24). A lower sprocket (25) is fixed at the end of the drive shaft (23). An upper sprocket (27) is provided above the lower sprocket (25). The upper sprocket (27) is rotated and positioned with the top of the cabinet (1) through the positioning seat (28). A chain (26) meshes between the lower sprocket (25) and the upper sprocket (27).

6. The heat dissipation type power distribution cabinet with internal circulation cooling air duct and sensor temperature control according to claim 5, characterized in that: One side of the upper sprocket (27) is connected to a shaft (30) via a first universal joint (29). The outside of the shaft (30) is rotated and positioned with the top of the cabinet (1) via a second shaft seat (31). The front end of the shaft (30) is fitted with a rotating shaft (33) via a second universal joint (32). The bottom end of the rotating shaft (33) extends downwards into the interior of the air intake chamber (5) and is fixed to the fan blade (8).

7. The heat dissipation type power distribution cabinet with internal circulation cooling air duct and sensor temperature control according to claim 6, characterized in that: The outside of the rotating shaft (33) is rotated and positioned with the cabinet (1) through the first sealed bearing (34), and the bottom of the rotating shaft (33) is rotatably connected to the perforated plate (21) through the first rotating seat (35).

8. A heat dissipation type power distribution cabinet with internal circulation cooling air duct and sensor temperature control according to claim 5, characterized in that: The lower sprocket (25) is fixed with a transmission rod (36) on the side away from the servo motor (10). One end of the transmission rod (36) passes through the inside of the sleeve (12) and is fixed with an active bevel gear (38). The outside of the transmission rod (36) is rotated and positioned with the sleeve (12) through the second sealed bearing (37).

9. A heat dissipation type power distribution cabinet with internal circulation cooling air duct and sensor temperature control according to claim 8, characterized in that: The upper part of the driving bevel gear (38) is meshed with the driven bevel gear (39), and the top of the driven bevel gear (39) is fixed with a main shaft (41). The top end of the main shaft (41) is rotated and positioned with the inner wall of the sleeve (12) through the second rotating seat (42). The outside of the main shaft (41) is fixed with several stirring blades (19), and the lower end of the main shaft (41) is rotated and positioned with the inner wall of the sleeve (12) through the third shaft seat (40).

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