Circulating air-cooled water-cooled dehumidification ventilation system in box-type substation

Abstract

The application discloses a circulating air-cooled water-cooled dehumidification ventilation system in a box-type substation, and belongs to the technical field of air conditioning ventilation circulation. The system comprises a box-type substation, a high-voltage frequency converter, a branch air pipe, a top-hung main air pipe, a hot air pipe, a booster fan, a cooling unit, a moisture absorption roller, a dehumidification box, a magnetic dehumidification assembly, a gravity water distribution assembly, a water storage tank and a temperature and humidity sensor. The high-voltage frequency converter fan collects hot air into the main air pipe, and the hot air enters the cooling unit through the hot air pipe and the booster fan, so that a fully-closed internal circulation cooling loop is formed. The moisture absorption roller cooperates with the magnetic moisture absorption strip and the magnetic dehumidification assembly to realize continuous dehumidification through adsorption, extrusion dehydration and regeneration; the dehumidification box is provided with cleaning bristles, and the dehumidification and dust removal modes can be switched according to the temperature and humidity. The application can isolate external moisture, dust and corrosive gas, realize closed-loop heat dissipation and online dehumidification, and the moisture absorption component can be recycled and regenerated without shutdown maintenance. The application is self-adaptive to dust removal protection and guarantees long-term stable operation of the equipment.

Description

Technical Field

[0001] This invention relates to the field of air conditioning and ventilation circulation technology, specifically to a circulating air-cooled and water-cooled dehumidification ventilation system for a prefabricated substation. Background Technology

[0002] As a core power distribution facility in power transmission and distribution systems, prefabricated substations are widely used in complex environments such as outdoor areas, industrial and mining areas, and coastal areas. The high-voltage frequency converters and other precision equipment inside generate significant heat during operation, requiring stringent temperature and humidity control and protection. Existing ventilation systems mostly employ open external circulation, directly introducing outside air, which cannot isolate moisture, dust, sand, and corrosive gases, easily leading to equipment dampness, short circuits, dust accumulation, aging, and corrosion damage. Ventilation systems with dehumidification functions often use fixed passive moisture absorption structures, which cannot continuously regenerate online. Once saturated, they require shutdown for maintenance and cannot adaptively adjust dehumidification and dust removal modes according to temperature and humidity. Long-term operation easily leads to dust accumulation and blockage of moisture absorption components, hard wear, and a continuous decline in dehumidification efficiency. This results in high maintenance costs, a high risk of failure, and difficulty in achieving long-term healthy internal air circulation within the substation, failing to provide a stable and clean operating environment for electrical equipment. Summary of the Invention

[0003] The technical problem to be solved by this invention is to address the issue that existing prefabricated substation ventilation systems cannot simultaneously achieve efficient heat dissipation, real-time monitoring of temperature and humidity for dehumidification, dust removal, and long-term protection.

[0004] To address the aforementioned technical problems, the present invention adopts the following technical solution: a circulating air-cooled and water-cooled dehumidification and ventilation system for a prefabricated substation, comprising a prefabricated substation installed on the ground, wherein multiple high-voltage frequency converters are installed inside the prefabricated substation, and each high-voltage frequency converter is equipped with a fan. The fan delivers hot air along the branch duct inside the prefabricated substation to the main duct. The main duct is suspended from the ceiling space inside the prefabricated substation by a hanger. The main duct delivers hot air uniformly to the hot air duct, which is equipped with a booster fan. An air inlet is connected to the lower side wall of the hot air duct. The air inlet is connected to a cooling unit installed outside the prefabricated substation. The cooling unit is equipped with a cold air outlet, which is located inside the prefabricated substation. A moisture-absorbing roller is provided at the connection between the hot air pipe and the air inlet. A through hole is opened at the bottom of the hot air pipe. The size of the moisture-absorbing roller matches the through hole, and the upper roller body is placed in the hot air circulation channel inside the hot air pipe. The moisture-absorbing roller includes a roller shaft rotatably mounted on the side wall of the hot air duct and a rotating roller body fixedly connected to the roller shaft. The roller shaft is equipped with a stepper motor, and multiple sets of hidden grooves are opened on the surface of the rotating roller body. Each set of hidden grooves is inlaid with a magnetic moisture-absorbing strip, which moves in and out within the hidden groove.

[0005] Furthermore, a dehumidification box is provided on the outer side wall of the hot air pipe near the moisture absorption roller. The dehumidification box is covered below the moisture absorption roller. A vent is provided on the side wall of the dehumidification box. A water leakage hole is provided at the bottom of the dehumidification box and a gravity water distribution component is provided.

[0006] Furthermore, a water storage tank is connected below the gravity water distribution component, a drain valve is installed at the bottom of the water storage tank, and a magnetic dehumidification component that cooperates with the moisture absorption roller is installed inside the dehumidification box.

[0007] Furthermore, the magnetic moisture-absorbing strip is formed by pressing together a multi-layered moisture-absorbing structure, consisting of a base plate, a passive adsorption magnetic plate, and a moisture-absorbing surface layer from the inside out. The base plate is also provided with an elastic pull line connected to the hidden groove.

[0008] Furthermore, the magnetic dehumidification assembly includes two electric push rods fixedly installed on the outer wall of the hot air duct. The telescopic ends of the two electric push rods are connected to a lifting plate. A strong magnetic suction plate is glued to the bottom of the lifting plate, and the strong magnetic suction plate is positioned corresponding to the passive adsorption magnetic plate.

[0009] Furthermore, multiple electric telescopic rods are vertically installed on the bottom inner wall of the dehumidification box. Multiple cleaning brushes are installed at the upper end of the electric telescopic rods. The lifting plate has a number of guide holes corresponding to the number of electric telescopic rods, and the electric telescopic rods and cleaning brushes pass freely through the guide holes.

[0010] Furthermore, the gravity water distribution assembly includes a fixed ring disposed at the bottom of the dehumidification box, a funnel-shaped water distributor disposed on the outer edge of the fixed ring, a spring disposed on the inner edge of the fixed ring, one end of the spring being connected to the fixed ring, and a sealing ball disposed on the other end, the sealing ball sealing the bottom opening of the funnel-shaped water distributor under the action of the spring.

[0011] Furthermore, the hot air duct is also connected to an emergency air outlet, and an air valve is installed at the end of the emergency air outlet.

[0012] Furthermore, the prefabricated substation is also equipped with temperature and humidity sensors.

[0013] The beneficial effects of this invention compared with the prior art are: (1) By setting up a fully enclosed internal circulation air-cooled and water-cooled ventilation structure, this invention achieves the effect of isolating external moisture, dust and corrosive gases, realizing closed-loop heat exchange and cooling of the air inside the box, and ensuring the safe and stable operation of the equipment; (2) By setting up a rotatable moisture-absorbing roller and a magnetic moisture-absorbing strip, this invention achieves the effect of passively driving the roller to rotate by hot airflow, continuously absorbing moisture in the air, and achieving uninterrupted dehumidification; (3) By setting up an adjustable magnetic dehumidification component, this invention achieves the effect of online squeezing, dehydration and regeneration of the magnetic moisture-absorbing strip, without stopping the machine to replace the moisture-absorbing component, and maintaining stable dehumidification efficiency; (4) By setting up a gravity water distribution component, a water storage tank and a drain valve, this invention achieves the effect of automatically collecting and discharging condensate and dust impurities, without disassembly and maintenance, and ensuring smooth flow. Attached Figure Description

[0014] Figure 1 This is a schematic diagram showing the overall air circulation within the prefabricated substation of the present invention.

[0015] Figure 2 This is a schematic diagram of the hot air collection duct of the high-voltage frequency converter of the present invention.

[0016] Figure 3 This is a schematic diagram of the internal structure of the hot air duct of the present invention.

[0017] Figure 4 This is a schematic diagram showing the location of the ventilation opening in this invention.

[0018] Figure 5 This is a schematic diagram showing the location of the magnetic dehumidification component of the present invention.

[0019] Figure 6 for Figure 5 A magnified structural diagram of point A in the middle.

[0020] Figure 7 This is a schematic diagram of the lifting plate and the strong magnetic suction plate in this invention.

[0021] Figure 8 This is a schematic diagram of the structure of the electric telescopic rod and cleaning brush in this invention.

[0022] Figure 9 This is a schematic diagram of the moisture-absorbing roller of the present invention.

[0023] Figure 10 This is a schematic diagram of the structure of the magnetic moisture-absorbing strip of the present invention.

[0024] Reference numerals: 1. Box-type substation; 2. High-voltage frequency converter; 3. Distribution duct; 4. Main duct; 5. Hanger; 6. Hot air duct; 7. Booster fan; 8. Emergency air outlet; 9. Air valve; 10. Air inlet; 11. Cooling unit; 12. Cold air outlet; 13. Water storage tank; 14. Drain valve; 15. Moisture absorption roller; 1501. Rotating roller body; 1502. Roller shaft; 1503. Concealed groove; 16. Dehumidification box; 1601. Ventilation outlet; 17. Gravity water distribution assembly; 1701 1702. Horn-shaped water distributor; 1703. Fixing ring; 1704. Sealing ball; 1705. Spring; 18. Magnetic dehumidification assembly; 1806. Lifting plate; 1807. Strong magnetic suction plate; 1808. Electric push rod; 1809. Electric telescopic rod; 18000. Guide hole; 18001. Cleaning brush; 19. Magnetic moisture-absorbing strip; 19001. Base plate; 1901. Passive adsorption magnetic plate; 1902. Moisture-absorbing surface layer; 1903. Elastic pull cord; 20. Temperature and humidity sensor. Detailed Implementation

[0025] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams only, not actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0026] Example: Figure 1 , Figure 2As shown, a circulating air-cooled and water-cooled dehumidification and ventilation system for a prefabricated substation includes a prefabricated substation 1 installed on the ground. Multiple high-voltage frequency converters 2 are installed inside the prefabricated substation 1. Each high-voltage frequency converter 2 is equipped with a fan. The fans transport hot air along distribution ducts 3 installed inside the prefabricated substation 1 to a main duct 4. The main duct 4 is suspended from the ceiling space inside the prefabricated substation 1 by hangers 5, thus not occupying installation and maintenance space for the equipment inside the substation. The ductwork at the top also allows for the comprehensive collection and distribution of hot air from various parts of the substation. The main duct 4 then uniformly delivers the hot air to a hot air duct 6. The substation is equipped with a booster fan 7 and an air inlet 10 connected to the lower side wall of the hot air duct 6. Hot air from the hot air duct 6 is pressurized and stabilized by the booster fan 7 before being sent to the air inlet 10. The air inlet 10 is connected to a cooling unit 11 installed outside the substation 1. After being fully cooled by heat exchange in the cooling unit 11, the hot air is returned to the substation 1 through a cold air vent 12 located inside the substation 1, completing the entire air circulation. A temperature and humidity sensor 20 is also installed inside the substation 1 to monitor temperature and humidity in real time, facilitating adjustments to the equipment's operating status by staff. The hot air duct 6 is also connected to an emergency air outlet 8, with a damper 9 at its end. The damper 9 is closed during normal operation; in an emergency, it can be opened to quickly connect to the outside air for ventilation.

[0027] like Figures 3-5 , Figure 9 As shown, a moisture-absorbing roller 15 is provided at the connection between the hot air duct 6 and the air inlet 10. Specifically, the moisture-absorbing roller 15 is rotatably mounted on one side wall of the hot air duct 6. A through hole is opened at the bottom of the hot air duct 6. The size of the moisture-absorbing roller 15 matches the through hole, and the upper roller body is placed in the hot air circulation channel inside the hot air duct 6. A dehumidification box 16 is also provided on the outer side wall of the hot air duct 6 near the moisture-absorbing roller 15. The dehumidification box 16 is covered below the moisture-absorbing roller 15. A vent 1601 is opened on the side wall of the dehumidification box 16. The dehumidified air enters the air inlet 10 through the vent 1601. A drain hole is opened at the bottom of the dehumidification box 16, and a gravity water distribution component 17 is provided. A water storage tank 13 is connected below the gravity water distribution component 17. A drain valve 14 is installed at the bottom of the water storage tank 13. A magnetic dehumidification component 18 that cooperates with the moisture-absorbing roller 15 is provided inside the dehumidification box 16.

[0028] The moisture-absorbing roller 15 includes a roller shaft 1502 rotatably mounted on the side wall of the hot air duct 6 and a rotating roller body 1501 fixedly connected to the roller shaft 1502. The roller shaft 1502 is equipped with a stepper motor (not shown in the figure, but can be set on the outside of the side wall of the hot air duct 6). The rotation position of the moisture-absorbing roller 15 can be controlled by the rotation of the stepper motor. Multiple sets of hidden grooves 1503 are opened on the surface of the rotating roller body 1501. Each set of hidden grooves 1503 is inlaid with a magnetic moisture-absorbing strip 19. The magnetic moisture-absorbing strip 19 can extend and retract within the hidden groove 1503.

[0029] like Figure 10 As shown, the magnetic moisture-absorbing strip 19 is a strip-shaped multi-layered moisture-absorbing structure pressed together. Specifically, from the inside out, it consists of a base plate 1901, a passive adsorption magnetic plate 1902, and a moisture-absorbing surface layer 1903. The moisture-absorbing surface layer 1903 is composed of industrial-grade PVA water-absorbing sponge and an electronic cooling chip bonded together. The base plate 1901 is made of modified glass fiber reinforced PET material. The base plate 1901 is also provided with an elastic pull line 1904 connected to the hidden groove 1503. The elastic pull line 1904 is used to drive the magnetic moisture-absorbing strip 19 to reset and retract into the hidden groove 1503.

[0030] like Figure 6 , Figure 7 As shown, the magnetic dehumidification assembly 18 includes two electric push rods 1803 fixedly mounted on the outer wall of the hot air duct 6. The telescopic ends of the two electric push rods 1803 are connected to a lifting plate 1801. A strong magnetic suction plate 1802 is adhered to the bottom of the lifting plate 1801, and the strong magnetic suction plate 1802 is positioned corresponding to the passive adsorption magnetic plate 1902. Multiple electric telescopic rods 1804 are also vertically mounted on the bottom inner wall of the dehumidification box 16. Multiple cleaning bristles 1806 are mounted on the upper end of the electric telescopic rods 1804. The cleaning bristles 1806 spread out in all directions to form a cleaning structure in an unconstrained state. The lifting plate 1801 has a number of guide holes 1805 corresponding to the number of electric telescopic rods 1804. The electric telescopic rods 1804 and the cleaning bristles 1806 can pass freely through the guide holes 1805 without interfering with the movement of the lifting plate 1801.

[0031] like Figures 5-6 As shown, the gravity water distribution assembly 17 includes a fixing ring 1702 disposed at the bottom of the dehumidification box 16. A funnel-shaped water distributor 1701 is disposed on the outer edge of the fixing ring 1702, and a spring 1704 is disposed on the inner edge of the fixing ring 1702. One end of the spring 1704 is connected to the fixing ring 1702, and the other end is disposed on a sealing ball 1703. Under the action of the spring 1704, the sealing ball 1703 seals and blocks the bottom opening of the funnel-shaped water distributor 1701. After the water accumulates, it can push open the sealing ball 1703 to achieve drainage.

[0032] Working principle: The high-voltage frequency converter 2 inside the prefabricated substation 1 generates a large amount of hot air, which is drawn out by its matching fan and collected into the main air duct 4 through the branch air duct 3. The main air duct 4 is suspended from the top of the prefabricated substation 1 by the hanger 5, and the hot air is uniformly sent into the hot air duct 6. After being pressurized and stabilized by the booster fan 7 in the hot air duct 6, the hot air is sent into the cooling unit 11 through the air inlet 10. After being cooled by the air-cooled and water-cooled combined heat exchange, it forms low-temperature cold air, which is then sent back into the prefabricated substation 1 through the cold air outlet 12 to continuously cool the electrical equipment inside the box, forming a fully enclosed internal circulation heat dissipation loop. No external air is introduced throughout the process, isolating external moisture, dust and corrosive gases.

[0033] When hot air flows through the hot air duct 6, the stepper motor rotates. The airflow passes through the gap between the moisture-absorbing roller 15 and the dehumidification box 16, and the magnetic moisture-absorbing strips 19 in the hidden groove 1503 on the surface of the rotating roller 1501, and enters the air inlet 10 with the roller. The electronic cooling chip in the moisture-absorbing surface 1903 cools the air, causing the gaseous water in the air to condense and be absorbed by the PVA sponge, fully adsorbing the moisture in the hot and humid air and completing the air dehumidification. The temperature and humidity sensor 20 in the box-type substation 1 monitors the ambient humidity in real time. When the humidity is detected to be high, the staff operates the stepper motor to control the hidden groove 1503 to face the magnetic dehumidification component 18, and starts the electric push rod 1803 to drive the lifting plate 18. 01. Moving upwards, the distance between the powerful magnetic suction plate 1802 and the passive adsorption magnetic plate 1902 decreases, and the magnetic attraction force is significantly enhanced. This overcomes the elasticity of the elastic pull wire 1904, causing the magnetic moisture-absorbing strip 19 to extend outwards from the hidden groove 1503 and tightly press against the lifting plate 1801, fully squeezing out the moisture in the moisture-absorbing surface 1903 to achieve online dehydration and regeneration. At this time, the electric telescopic rod 1804 and the upper cleaning brush bristles 1806 pass through the guide hole 1805 of the lifting plate 1801. The cleaning brush bristles 1806 are constrained by the inner wall of the guide hole 1805 and are in a gathered state, not in contact with the magnetic moisture-absorbing strip 19, and do not interfere with the squeezing and dehydration operation of the lifting plate 1801 and the magnetic moisture-absorbing strip 19.

[0034] After dehydration, the magnetic moisture-absorbing strip 19 rotates out of the magnetic attraction range with the roller body and automatically retracts into the hidden groove 1503 under the rebound action of the elastic pull line 1904. After resetting, it re-enters the hot air channel to absorb moisture, and repeats the cycle to achieve uninterrupted continuous dehumidification. The squeezed water falls into the bottom of the dehumidification box 16 under the action of gravity and collects at the gravity water distribution component 17. After the water accumulates, the top pressure sealing ball 1703 moves downward against the elastic force of the spring 1704, opening the bottom opening of the trumpet-shaped water distributor 1701. The water flows into the water storage tank 13 for unified storage. Impurities and condensate in the tank can be collected together into the water storage tank 13 and finally discharged periodically through the drain valve 14.

[0035] When the temperature and humidity sensor 20 detects that the humidity inside the chamber is low, the operator can switch to the dust removal mode. The electric push rod 1803 pulls the lifting plate 1801 downward, increasing the distance between the strong magnetic suction plate 1802 and the passive adsorption magnetic plate 1902, and significantly weakening the magnetic attraction. The magnetic moisture-absorbing strip 19 cannot extend and remains flush with the surface of the rotating roller 1501. At this time, the cleaning bristles 1806 are freed from the constraint of the guide hole 1805 and spread outwards under their own elasticity to form a cleaning surface. At the same time, the electric telescopic rod 1804 is activated so that the cleaning bristles 1806 make slight contact with the moisture-absorbing surface 1903 of the magnetic moisture-absorbing strip 19. As the moisture-absorbing roller 15 rotates, it scrapes away the surface dust, completing the dust removal and purification of the circulating air while achieving adaptive protection of the moisture-absorbing components and extending their service life.

Claims

1. A circulating air-cooled and water-cooled dehumidification and ventilation system for a prefabricated substation, characterized in that, The system includes a box-type substation (1) located on the ground. The box-type substation (1) is equipped with multiple high-voltage frequency converters (2). Each high-voltage frequency converter (2) is equipped with a fan. The fan delivers hot air through the branch air duct (3) inside the box-type substation (1) to the main air duct (4). The main air duct (4) is suspended from the top space inside the box-type substation (1) by a hanger (5). The main air duct (4) delivers hot air to the hot air duct (6). A booster fan (7) is installed inside the hot air duct (6). An air inlet (10) is connected to the lower side wall of the hot air duct (6). The air inlet (10) is connected to a cooling unit (11) installed outside the box-type substation (1). The cooling unit (11) is equipped with a cold air outlet (12). The cold air outlet (12) is located inside the box-type substation (1). A moisture-absorbing roller (15) is provided at the connection between the hot air pipe (6) and the air inlet (10). A through hole is provided at the bottom of the hot air pipe (6). The size of the moisture-absorbing roller (15) matches the through hole and the upper roller body is placed in the hot air circulation channel inside the hot air pipe (6). The moisture-absorbing roller (15) includes a roller shaft (1502) rotatably mounted on the side wall of the hot air pipe (6) and a rotating roller body (1501) fixedly connected to the roller shaft (1502). The roller shaft (1502) is equipped with a stepper motor. Multiple sets of hidden grooves (1503) are opened on the surface of the rotating roller body (1501). Each set of hidden grooves (1503) is inlaid with a magnetic moisture-absorbing strip (19). The magnetic moisture-absorbing strip (19) moves in and out within the hidden groove (1503).

2. The internal circulating air-cooled and water-cooled dehumidification ventilation system for prefabricated substations according to claim 1, characterized in that, A dehumidification box (16) is provided on the outer side wall of the hot air pipe (6) in the direction close to the moisture absorption roller (15). The dehumidification box (16) is covered under the moisture absorption roller (15). A vent (1601) is provided on the side wall of the dehumidification box (16). A water leakage hole is provided at the bottom of the dehumidification box (16) and a gravity water distribution component (17) is provided.

3. The internal circulating air-cooled and water-cooled dehumidification ventilation system for prefabricated substations according to claim 2, characterized in that, The gravity water distribution component (17) is connected to a water storage tank (13) below, and a drain valve (14) is installed at the bottom of the water storage tank (13). The dehumidification box (16) is equipped with a magnetic dehumidification component (18) that cooperates with the moisture absorption roller (15).

4. The internal circulating air-cooled and water-cooled dehumidification ventilation system for prefabricated substations according to claim 1, characterized in that, The magnetic moisture-absorbing strip (19) is formed by pressing together a strip-shaped multi-layer moisture-absorbing structure. From the inside out, it consists of a base plate (1901), a passive adsorption magnetic plate (1902), and a moisture-absorbing surface layer (1903). The base plate (1901) is also provided with an elastic pull line (1904) connected to the hidden groove (1503).

5. The internal circulating air-cooled and water-cooled dehumidification ventilation system for prefabricated substations according to claim 3, characterized in that, The magnetic dehumidification assembly (18) includes two electric push rods (1803) fixedly installed on the outer wall of the hot air duct (6). The telescopic ends of the two electric push rods (1803) are connected to a lifting plate (1801). A strong magnetic suction plate (1802) is glued to the bottom of the lifting plate (1801). The strong magnetic suction plate (1802) is positioned corresponding to the passive adsorption magnetic plate (1902).

6. The internal circulating air-cooled and water-cooled dehumidification ventilation system for prefabricated substations according to claim 5, characterized in that, Multiple electric telescopic rods (1804) are vertically installed on the bottom inner wall of the dehumidification box (16). Multiple cleaning brushes (1806) are installed at the upper end of the electric telescopic rods (1804). The lifting plate (1801) has a number of guide holes (1805) corresponding to the number of electric telescopic rods (1804). The electric telescopic rods (1804) and the cleaning brushes (1806) pass freely through the guide holes (1805).

7. The internal circulating air-cooled and water-cooled dehumidification ventilation system for prefabricated substations according to claim 2, characterized in that, The gravity water distribution assembly (17) includes a fixing ring (1702) at the bottom of the dehumidification box (16), a horn-shaped water distributor (1701) on the outer edge of the fixing ring (1702), and a spring (1704) on the inner edge of the fixing ring (1702). One end of the spring (1704) is connected to the fixing ring (1702), and the other end is provided with a sealing ball (1703). The sealing ball (1703) seals and blocks the bottom opening of the horn-shaped water distributor (1701) under the action of the spring (1704).

8. The internal circulating air-cooled and water-cooled dehumidification ventilation system for prefabricated substations according to claim 1, characterized in that, The hot air duct (6) is also connected to an emergency air outlet (8), and an air valve (9) is provided at the end of the emergency air outlet (8).

9. The internal circulating air-cooled and water-cooled dehumidification ventilation system for a prefabricated substation according to claim 1, characterized in that, The box-type substation (1) is also equipped with a temperature and humidity sensor (20).

Images