A constant-voltage power supply device with high safety

Abstract

The application discloses a high-safety constant-voltage power supply device, which comprises a shell, a heat dissipation plate fixedly connected to the outer surface of the shell, and a hollow interior of the shell, and symmetrically arranged heat dissipation holes are formed at the front and rear ends of the outer surface of the shell, and a sealing assembly is arranged on the inner side of the heat dissipation holes, wherein the sealing assembly comprises a slot formed in the inner wall of the shell, and a receiving groove is formed in the inner surface of the slot. The sealing assembly is arranged, the heat dissipation holes on the surface of the shell can be sealed by the sealing plate, dust in the external environment can be effectively prevented from entering the interior of the shell, the influence of the dust on the heat dissipation effect of the voltage stabilizer can be effectively reduced, the heat dissipation holes can be automatically opened and closed according to the temperature change in the interior of the shell, the temperature in the interior of the shell can be maintained within a proper range, and the stability and reliability of the power supply during long-time working can be improved.

Description

Technical Field

[0001] This invention relates to the field of power equipment technology, and in particular to a high-safety constant voltage power supply device. Background Technology

[0002] A constant voltage power supply is an electronic device that can provide a stable voltage output. Its core feature is that it can maintain a constant output voltage when the load changes or the input voltage fluctuates. Constant voltage power supplies achieve voltage stability through various technical paths (such as linear regulation, switching control, ferroresonance, etc.) and are widely used in electronics, industry, medical and other fields.

[0003] Constant voltage power supplies generate heat during operation due to energy conversion. Poor heat dissipation may lead to overheating, reduced efficiency, or even damage to the devices. Therefore, existing constant voltage power supplies often use air cooling. For example, Chinese patent CN217721891U discloses a high-frequency high-voltage constant current power supply heat dissipation device. It uses a cooling fan to drive airflow to cool the constant voltage power supply. Furthermore, the air flowing into the casing through the air inlet is cooled by the throttling expansion effect, effectively improving the heat dissipation effect without changing the cooling fan.

[0004] When existing constant voltage power supply devices are ventilated and cooled, moisture and dust in the air will enter the constant voltage power supply along with the air. After the moisture enters the constant voltage power supply, condensation will form inside the constant voltage power supply when the temperature difference is large. Condensation not only increases the risk of short circuit of the constant voltage power supply, but also causes corrosion to metal electrical components, thus adversely affecting the service life of the constant voltage power supply. Dust will adhere to the surface of electrical components after entering the constant voltage power supply, thus affecting the normal heat dissipation of electrical components. Summary of the Invention

[0005] This invention provides a highly safe constant voltage power supply device to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A high-safety constant voltage power supply device includes a housing, the interior of which is hollow, a heat sink plate is fixedly connected to the outer surface of the housing, and heat dissipation holes are symmetrically opened at both ends of the outer surface of the housing, with a sealing component provided inside the heat dissipation holes; The sealing assembly includes a slot formed in the inner wall of the housing, a storage groove formed on the inner surface of the slot, a metal plate fixedly connected to the inner surface of the storage groove, a sealing plate fixedly connected to the side of the metal plate away from the storage groove, a pin fixedly connected to the inner surface of the housing, the outer surface of the pin being rotatably connected to the sealing plate, and the outer surface of the sealing plate being in contact with the inner wall of the slot.

[0007] Preferably, the metal plate has a U-shaped structure, the sealing plate has an embedded cavity, the metal plate is made of thermally expandable metal, the number of the pins and the sealing plates are two sets and they are distributed corresponding to the heat dissipation holes, and the sealing plate is made of lightweight material.

[0008] Preferably, a moisture-absorbing component is provided on the inner side of the housing. The moisture-absorbing component includes a limiting groove formed at the lower end of the inner surface of the housing. A moisture-absorbing plate is slidably connected to the inner side of the limiting groove. The moisture-absorbing plate is arc-shaped. The upper end of the moisture-absorbing plate is fixedly connected to the inner surface of the housing. The moisture-absorbing plate is made of an elastic material.

[0009] Preferably, the inner surface of the housing is provided with a movable groove, a slide rod is slidably connected to the inner side of the movable groove, a cleaning plate is fixedly connected to the outer surface of the slide rod, the number of cleaning plates is several groups and they are distributed in a ring array, the cleaning plate slides in contact with the lower outer surface of the moisture-absorbing plate, a traction strip is fixedly connected to the outer surface of the slide rod, and the end of the traction strip away from the moisture-absorbing plate is fixedly connected to the outer surface of the sealing plate.

[0010] Preferably, a cooling assembly is provided on the lower side of the housing. The cooling assembly includes a movable cavity opened inside the housing. A heat sink is fixedly connected to the outer surface of the lower end of the housing. A liquid storage cavity is embedded in the inner side of the heat sink. The upper end of the liquid storage cavity is connected to the interior of the movable cavity. The number of heat sinks is several groups and they are distributed in a linear array. An appropriate amount of coolant is provided inside the movable cavity and the liquid storage cavity.

[0011] Preferably, an actuating assembly is provided inside the housing. The actuating assembly includes a piston plate that is slidably connected to the inner surface of the movable cavity. An elastic band is fixedly connected to the outer surface of the piston plate, and the end of the elastic band away from the piston plate is fixedly connected to the inner surface of the movable cavity.

[0012] Preferably, a pad is fixedly connected to the lower end of the inner surface of the shell, a bladder is fixedly connected to the upper outer surface of the pad, the upper outer surface of the bladder is fixedly connected to the outer surface of the sealing plate, the bladder is arc-shaped, and an air guide tube is fixedly connected to the lower outer surface of the bladder. The air guide tube is connected to the interior of the movable cavity, and a control valve is provided inside the air guide tube.

[0013] Preferably, a vibration assembly is provided on the outer side of the moisture-absorbing plate. The vibration assembly includes an ear fixedly connected to the outer surface of the upper end of the pad. A movable rod is fixedly connected to the outer surface of the ear. A pressing plate is rotatably connected to the outer surface of the movable rod. The outer surface of the pressing plate is in sliding contact with the moisture-absorbing plate.

[0014] Preferably, a fixing rod is fixedly connected to the inner side of the housing, a voltage regulator is sleeved on the outer surface of the fixing rod, and sealing sleeves and wiring ports are provided at both the front and rear ends of the outer surface of the housing, and the power cord extends into the housing through the sealing sleeves.

[0015] Preferably, connecting rods are fixedly connected to the front and rear ends of the outer surface of the housing, and the number of connecting rods is four sets, which are distributed at the four corners of the housing. Mounting plates are symmetrically fixedly connected to the front and rear ends of the outer surface of the housing, and mounting grooves are formed on the outer surface of the mounting plates.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This solution is equipped with a sealing component. The sealing plate can seal the heat dissipation holes on the surface of the housing, thereby effectively reducing the amount of dust from the external environment entering the housing. This effectively reduces the impact of dust on the heat dissipation of the voltage regulator. The heat dissipation holes are automatically opened and closed according to the temperature changes inside the housing, thereby maintaining the internal temperature of the housing within an appropriate range and improving the stability and reliability of the power supply during long-term operation. 2. This solution is equipped with a moisture-absorbing component. The moisture-absorbing plate is made of a fine mesh structure, which can fully absorb moisture in the air, thereby effectively reducing the amount of moisture entering the shell and reducing the chance of condensation inside the shell. The cleaning plate can scrape and clean the dust attached to the surface of the moisture-absorbing plate, thereby effectively reducing the amount of dust attached to the surface of the moisture-absorbing plate and ensuring the moisture absorption effect of the moisture-absorbing plate. 3. This solution incorporates a vibration component. The movement of the moisture-absorbing plate shakes off the dust adhering to its surface, further reducing dust residue and ensuring the permeability and adsorption effect of the plate. This not only enhances the adsorption of moisture inside the casing but also extends the working time of the moisture-absorbing plate to some extent. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural diagram of a high-safety constant voltage power supply device according to the present invention; Figure 2 This is a top view of a high-safety constant voltage power supply device according to the present invention; Figure 3 for Figure 2 Sectional view along the middle AA direction; Figure 4 for Figure 3 Enlarged view of point B in the middle; Figure 5 This is a schematic diagram of the cooling component in a high-safety constant voltage power supply device of the present invention; Figure 6 for Figure 3 Enlarged view of point C in the middle; Figure 7 for Figure 3 Enlarged view of point D in the middle; Figure 8 for Figure 5 Enlarged diagram of point E in the middle.

[0019] Explanation of reference numerals in the attached figures: 10. Moisture-absorbing plate; 11. Shell; 12. Connecting rod; 13. Sealing sleeve; 14. Mounting plate; 15. Heat dissipation plate; 16. Wiring port; 17. Mounting groove; 18. Heat dissipation hole; 19. Fixing rod; 20. Voltage stabilizer; 21. Storage groove; 22. Metal plate; 23. Sealing plate; 24. Pin; 25. Traction bar; 26. Cavity; 27. Bag body; 28. Air guide tube; 29. ​​Pad plate; 30. Squeezing plate; 31. Ear seat; 32. Movable rod; 33. Piston plate; 34. Elastic band; 35. Slide rod; 36. Cleaning plate; 37. Movable groove; 39. Liquid storage chamber; 40. Heat dissipation base; 41. Groove opening; 42. Movable cavity; 43. Limiting groove. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figures 1 to 8 This invention provides a technical solution: A high-safety constant voltage power supply device includes a housing 11, a heat sink 15 fixedly connected to the outer surface of the housing 11, the interior of the housing 11 is hollow, and heat dissipation holes 18 are symmetrically opened at both ends of the outer surface of the housing 11, and a sealing component is provided inside the heat dissipation holes 18.

[0022] The sealing assembly includes a slot 41 formed in the inner wall of the housing 11. A receiving groove 21 is formed on the inner surface of the slot 41. A metal plate 22 is fixedly connected to the inner surface of the receiving groove 21. A sealing plate 23 is fixedly connected to the side of the metal plate 22 away from the receiving groove 21. A pin 24 is fixedly connected to the inner surface of the housing 11. The outer surface of the pin 24 is rotatably connected to the sealing plate 23. The outer surface of the sealing plate 23 is in close contact with the inner wall of the slot 41.

[0023] The metal plate 22 may be U-shaped, and the sealing plate 23 has an embedded cavity 26. The metal plate 22 is made of thermally expandable metal. There are two sets of pins 24 and sealing plates 23, which are distributed in correspondence with the heat dissipation holes 18. The sealing plate 23 is made of lightweight material.

[0024] A fixing rod 19 can be fixedly connected to the inner side of the housing 11. A voltage regulator 20 is sleeved on the outer surface of the fixing rod 19. Sealing sleeves 13 and wiring ports 16 are provided at both the front and rear ends of the outer surface of the housing 11. The power cord extends into the housing 11 through the sealing sleeves 13.

[0025] By adopting the above technical solution, the voltage regulator 20 is installed inside the housing 11 by the fixing rod 19 during use. The housing 11 can provide good protection for the voltage regulator 20 inside. At the same time, there is a certain gap between the voltage regulator 20 and the inner wall of the housing 11, so that air can flow through the gap between the housing 11 and the voltage regulator 20, thereby enabling the voltage regulator 20 to dissipate heat evenly. Several sets of heat dissipation plates 15 on the surface of the housing 11 can effectively increase the contact area with air, thereby improving the heat dissipation effect inside the housing 11. The sealing sleeve 13 on the surface of the housing 11 can improve the sealing effect between the power cord and the housing 11. The wiring port 16 on the surface of the housing 11 is used for quick plugging of the data cable. The housing 11 is rotatably supported by the sealing plate 23 by the pin 24. Under the elastic force of the metal plate 22, the sealing plate 23 will stick to the inner wall of the housing 11. The sealing plate 23 can seal the heat dissipation holes 18 on the surface of the housing 11, thereby effectively reducing the entry of dust from the external environment into the housing 11, and thus effectively reducing the impact of dust on the heat dissipation effect of the voltage regulator 20. Due to the influence of the sealing plate 23, the cavity 26 inside the sealing plate 23 can reduce the weight of the sealing plate 23 to a certain extent, thereby reducing the resistance of the sealing plate 23 to flipping. During the operation of the voltage regulator 20, heat will be continuously generated as the current flows. After working for a period of time, the temperature inside the housing 11 will continue to rise, and the metal plate 22 will gradually be heated and extended. Its shape will flip from a U-shaped structure to a straight shape. At this time, the metal plate 22 will push the sealing plate 23, causing the sealing plate 23 to flip away from the heat dissipation hole 18 with the pin 24 as the fulcrum. As the sealing plate 23 gradually loses contact with the heat dissipation hole 18, the heat dissipation hole 18 will be opened to allow external air to enter the housing 11. The two sets of symmetrically arranged heat dissipation holes 18 can facilitate the formation of air convection inside the housing 11, thereby accelerating the ventilation and heat dissipation inside the housing 11. By setting the sealing component, the heat dissipation hole 18 can be automatically opened and closed according to the temperature change inside the housing 11, thereby maintaining the temperature inside the housing 11 within an appropriate range, and thus improving the stability and reliability of the power supply during long-term operation.

[0026] Specifically, such as Figure 3 , Figure 6 and Figure 7 As shown, a moisture-absorbing component is provided on the inner side of the housing 11. The moisture-absorbing component includes a limiting groove 43 formed at the lower end of the inner surface of the housing 11. A moisture-absorbing plate 10 is slidably connected to the inner side of the limiting groove 43. The moisture-absorbing plate 10 is arc-shaped. The upper end of the moisture-absorbing plate 10 is fixedly connected to the inner surface of the housing 11. The moisture-absorbing plate 10 is made of an elastic material.

[0027] The inner surface of the housing 11 is provided with a movable groove 37. A slide rod 35 is slidably connected to the inner side of the movable groove 37. A cleaning plate 36 is fixedly connected to the outer surface of the slide rod 35. The number of cleaning plates 36 is several groups and they are arranged in a ring array. The cleaning plate 36 slides in contact with the lower outer surface of the moisture-absorbing plate 10. A traction strip 25 is fixedly connected to the outer surface of the slide rod 35. The end of the traction strip 25 away from the moisture-absorbing plate 10 is fixedly connected to the outer surface of the sealing plate 23.

[0028] By adopting the above technical solution, when the housing 11 is ventilating and dissipating heat, moisture in the air will enter the interior of the housing 11 along with the air. In order to reduce the probability of moisture condensing inside the housing 11, a moisture-absorbing component is provided. During operation, when air enters the interior of the housing 11 through the heat dissipation hole 18, the air will come into contact with the surface of the moisture-absorbing plate 10. The moisture-absorbing plate 10 is composed of a fine mesh structure, which can fully absorb the moisture in the air, thereby effectively reducing the amount of moisture entering the interior of the housing 11 and thus reducing the probability of condensation inside the housing 11. At the same time, the moisture-absorbing plate 10 can filter dust in the air. The lower end of the moisture-absorbing plate 10 is located inside the limiting groove 43, so that the moisture-absorbing plate 10 can be positioned within the limiting groove 43. The sealing plate 23 slides within a certain range. When the sealing plate 23 flips, the sliding rod 35 and the cleaning plate 36 move along the inside of the movable groove 37 under the action of gravity. During the movement, the cleaning plate 36 slides and contacts the outer surface of the moisture-absorbing plate 10. The cleaning plate 36 can scrape and clean the dust attached to the surface of the moisture-absorbing plate 10, thereby effectively reducing the adhesion of dust on the surface of the moisture-absorbing plate 10 and ensuring the moisture absorption effect of the moisture-absorbing plate 10. When the sealing plate 23 moves in the opposite direction, the sealing plate 23 pulls the sliding rod 35 through the traction bar 25, thereby causing the sliding rod 35 to move upward along the movable groove 37. This allows the cleaning plate 36 to scrape and clean the moisture-absorbing plate 10 again through the sliding rod 35.

[0029] Specifically, such as Figure 5 , Figure 6 and Figure 8As shown, a cooling assembly is provided on the lower side of the housing 11. The cooling assembly includes a movable cavity 42 opened inside the housing 11. A heat sink 40 is fixedly connected to the outer surface of the lower end of the housing 11. A liquid storage cavity 39 is embedded in the inner side of the heat sink 40. The upper end of the liquid storage cavity 39 is connected to the interior of the movable cavity 42. The number of heat sinks 40 is several groups and they are distributed in a linear array. An appropriate amount of coolant is provided inside the movable cavity 42 and the liquid storage cavity 39.

[0030] By adopting the above technical solution, the heat sink 40 on the lower side of the housing 11 can effectively increase the contact area between the housing 11 and the air, thereby further improving the heat dissipation effect inside the housing 11. The movable cavity 42 and the liquid storage cavity 39 are filled with an appropriate amount of coolant. The coolant can absorb the heat inside the housing 11 and then transfer the heat to the outside of the housing 11 through the heat sink 40, thereby keeping the temperature inside the housing 11 within an appropriate range and further improving the heat dissipation efficiency inside the housing 11.

[0031] Specifically, such as Figure 5 and Figure 8 As shown, an actuating assembly is provided inside the housing 11. The actuating assembly includes a piston plate 33 that is slidably connected to the inner surface of the movable cavity 42. An elastic band 34 is fixedly connected to the outer surface of the piston plate 33. The end of the elastic band 34 away from the piston plate 33 is fixedly connected to the inner surface of the movable cavity 42.

[0032] A pad 29 is fixedly connected to the lower end of the inner surface of the housing 11. A bladder 27 is fixedly connected to the upper outer surface of the pad 29. The upper outer surface of the bladder 27 is fixedly connected to the outer surface of the sealing plate 23. The bladder 27 is arc-shaped. An air guide tube 28 is fixedly connected to the lower outer surface of the bladder 27. The air guide tube 28 is connected to the interior of the movable cavity 42. A control valve is provided inside the air guide tube 28.

[0033] By adopting the above technical solution, in order to improve the flowability of the coolant inside the movable cavity 42 and the reservoir 39, a toggle assembly is provided. When the sealing plate 23 flips away from the heat dissipation hole 18, the sealing plate 23, together with the pad 29, squeezes the bladder 27. At this time, the gas inside the bladder 27 enters the movable cavity 42 through the gas guide pipe 28. The gas pushes the piston plate 33 inside the movable cavity 42. During the movement, the piston plate 33 pushes the coolant inside the movable cavity 42, thereby causing the coolant to flow irregularly inside the movable cavity 42 and the reservoir 39. This allows the coolant to fully contact the inner wall of the movable cavity 42, thereby further improving the coolant's heat absorption effect. During the movement, the piston plate 33 pulls the elastic band 34. When the sealing plate 23 moves in the opposite direction, the gas re-enters the bladder 27 through the control valve inside the air guide pipe 28. At this time, the piston plate 33 moves in the opposite direction and resets under the elastic force of the elastic band 34. The movement of the piston plate 33 can agitate the coolant inside the movable cavity 42 again, thereby increasing the flow rate of the coolant and further improving the heat dissipation effect inside the shell 11.

[0034] Specifically, such as Figure 6 As shown, a vibration assembly is provided on the outer side of the moisture-absorbing plate 10. The vibration assembly includes an ear seat 31 fixedly connected to the outer surface of the upper end of the pad 29. A movable rod 32 is fixedly connected to the outer surface of the ear seat 31. A pressing plate 30 is rotatably connected to the outer surface of the movable rod 32. The outer surface of the pressing plate 30 is in sliding contact with the moisture-absorbing plate 10.

[0035] By adopting the above technical solution, the pad 29 is fixedly supported by the ear seat 31 for the movable rod 32, and the movable rod 32 is used to rotate and support the extrusion plate 30. When the slide rod 35 drives the cleaning plate 36 to move to the lower side along the movable groove 37, the slide rod 35 will contact the upper surface of the extrusion plate 30. At this time, the extrusion plate 30 will be flipped downward at a certain angle under the gravity of the slide rod 35, and the extrusion plate 30 will extrude and push the moisture-absorbing plate 10. At this time, the lower end of the moisture-absorbing plate 10 will slide along the inside of the limiting groove 43 under the pushing force of the extrusion plate 30. After the slide bar 35 disengages from the extrusion plate 30, the moisture-absorbing plate 10 will move back to its original position under its own elastic force, thereby causing the moisture-absorbing plate 10 to swing to a certain extent. The movement of the moisture-absorbing plate 10 can shake off the dust attached to the surface of the moisture-absorbing plate 10, thereby further reducing the dust residue on the surface of the moisture-absorbing plate 10, thus ensuring the permeability and adsorption effect of the moisture-absorbing plate 10. This not only further improves the adsorption effect on the moisture inside the shell 11, but also extends the working time of the moisture-absorbing plate 10 to a certain extent.

[0036] Specifically, such as Figure 1As shown, connecting rods 12 are fixedly connected to the front and rear ends of the outer surface of the housing 11. There are four sets of connecting rods 12, which are distributed at the four corners of the housing 11. Mounting plates 14 are symmetrically fixedly connected to the front and rear ends of the outer surface of the housing 11. Mounting grooves 17 are opened on the outer surface of the mounting plates 14.

[0037] By adopting the above technical solution, the connecting rod 12 on the surface of the housing 11 can lock and fix the front and rear ends of the housing 11, thereby effectively improving the structural strength of the housing 11. The mounting plate 14 on the surface of the housing 11, together with the mounting groove 17, can realize the quick installation and fixation of the housing 11, thereby reducing the installation difficulty of the housing 11 to a certain extent.

[0038] Working principle: During operation, the voltage regulator 20 continuously generates heat as current flows through it. At this time, the metal plate 22 pushes the sealing plate 23, causing it to flip away from the heat dissipation hole 18, using the pin 24 as a fulcrum. The two symmetrically arranged heat dissipation holes 18 facilitate air convection within the housing 11, accelerating ventilation and heat dissipation. When air enters the housing 11 through the heat dissipation holes 18, it comes into contact with the surface of the moisture-absorbing plate 10. The moisture-absorbing plate 10, composed of a fine mesh structure, effectively absorbs moisture from the air. During its movement, the cleaning plate 36 slides against the outer surface of the moisture-absorbing plate 10, scraping away dust adhering to its surface. The coolant then cleans the housing. The heat inside the housing 11 is absorbed and then transferred to the outside of the housing 11 through the heat sink 40, thereby keeping the temperature inside the housing 11 within an appropriate range. The piston plate 33 inside the movable cavity 42 is pushed by the gas. During the movement of the piston plate 33, the coolant inside the movable cavity 42 is pushed, so that the coolant is in full contact with the inner wall of the movable cavity 42, thereby further improving the heat absorption effect of the coolant. The lower end of the moisture-absorbing plate 10 slides along the limiting groove 43 under the pushing action of the extrusion plate 30. The movement of the moisture-absorbing plate 10 can shake off the dust attached to the surface of the moisture-absorbing plate 10, thereby further reducing the dust residue on the surface of the moisture-absorbing plate 10, thus ensuring the permeability and adsorption effect of the moisture-absorbing plate 10.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-safety constant voltage power supply device, characterized in that: Includes a housing (11), the interior of which is hollow, a heat sink (15) is fixedly connected to the outer surface of the housing (11), and heat dissipation holes (18) are symmetrically opened at both ends of the outer surface of the housing (11), and a sealing component is provided inside the heat dissipation holes (18). The sealing assembly includes a slot (41) formed in the inner wall of the housing (11), a receiving groove (21) formed on the inner surface of the slot (41), a metal plate (22) fixedly connected to the inner surface of the receiving groove (21), a sealing plate (23) fixedly connected to the side of the metal plate (22) away from the receiving groove (21), a pin (24) fixedly connected to the inner surface of the housing (11), the outer surface of the pin (24) rotatably connected to the sealing plate (23), and the outer surface of the sealing plate (23) in close contact with the inner wall of the slot (41); the metal plate (22) has a U-shaped structure, and a cavity (26) is embedded inside the sealing plate (23); the metal plate (22) is made of thermally expandable metal; the number of the pin (24) and the sealing plate (23) are both two sets and distributed corresponding to the heat dissipation holes (18); the sealing plate (23) is made of lightweight material; A moisture-absorbing component is provided inside the housing (11). The moisture-absorbing component includes a limiting groove (43) opened at the lower end of the inner surface of the housing (11). A moisture-absorbing plate (10) is slidably connected inside the limiting groove (43). The moisture-absorbing plate (10) is arc-shaped. The upper end of the moisture-absorbing plate (10) is fixedly connected to the inner surface of the housing (11). The moisture-absorbing plate (10) is made of elastic material. The inner surface of the housing (11) is provided with a movable groove (37), and a slide rod (35) is slidably connected to the inner side of the movable groove (37). A cleaning plate (36) is fixedly connected to the outer surface of the slide rod (35). The number of cleaning plates (36) is several groups and they are arranged in a ring array. The cleaning plate (36) slides in contact with the lower outer surface of the moisture-absorbing plate (10). A traction strip (25) is fixedly connected to the outer surface of the slide rod (35). The end of the traction strip (25) away from the moisture-absorbing plate (10) is fixedly connected to the outer surface of the sealing plate (23). A cooling assembly is provided on the lower side of the housing (11). The cooling assembly includes a movable cavity (42) opened inside the housing (11). A heat sink (40) is fixedly connected to the outer surface of the lower end of the housing (11). A liquid storage cavity (39) is embedded in the inner side of the heat sink (40). The upper end of the liquid storage cavity (39) is connected to the interior of the movable cavity (42). The number of heat sinks (40) is several groups and they are arranged in a linear array. An appropriate amount of coolant is provided inside the movable cavity (42) and the liquid storage cavity (39). An actuating assembly is provided inside the housing (11). The actuating assembly includes a piston plate (33) that is slidably connected to the inner surface of the movable cavity (42). An elastic band (34) is fixedly connected to the outer surface of the piston plate (33). The end of the elastic band (34) away from the piston plate (33) is fixedly connected to the inner surface of the movable cavity (42). A pad (29) is fixedly connected to the lower end of the inner surface of the shell (11). A bladder (27) is fixedly connected to the outer surface of the upper end of the pad (29). The outer surface of the upper end of the bladder (27) is fixedly connected to the outer surface of the sealing plate (23). The bladder (27) is arc-shaped. A duct (28) is fixedly connected to the outer surface of the lower end of the bladder (27). The duct (28) is connected to the interior of the active cavity (42). A control valve is provided inside the duct (28). When the sealing plate (23) flips over, the sealing plate (23) and the pad (29) squeeze the bladder (27). The gas inside the bladder (27) enters the active chamber (42) through the air guide tube (28) and pushes the piston plate (33). The piston plate (33) pushes the coolant inside the active chamber (42). At the same time, the sealing plate (23) pulls the slide bar (35) through the traction bar (25). The slide bar (35) drives the cleaning plate (36) to scrape and clean the moisture-absorbing plate (10).

2. The high-safety constant voltage power supply device according to claim 1, characterized in that: A vibration assembly is provided on the outside of the moisture-absorbing plate (10). The vibration assembly includes an ear seat (31) fixedly connected to the upper outer surface of the pad (29). A movable rod (32) is fixedly connected to the outer surface of the ear seat (31). A pressing plate (30) is rotatably connected to the outer surface of the movable rod (32). The outer surface of the pressing plate (30) slides in contact with the moisture-absorbing plate (10).

3. A high-safety constant voltage power supply device according to any one of claims 1 to 2, characterized in that: A fixing rod (19) is fixedly connected to the inner side of the housing (11). A voltage regulator (20) is sleeved on the outer surface of the fixing rod (19). A sealing sleeve (13) and a wiring port (16) are provided at both ends of the outer surface of the housing (11). The power cord extends into the housing (11) through the sealing sleeve (13).

4. A high-safety constant voltage power supply device according to claim 3, characterized in that: Connecting rods (12) are fixedly connected to the front and rear ends of the outer surface of the housing (11). There are four sets of connecting rods (12) distributed at the four corners of the housing (11). Mounting plates (14) are symmetrically fixedly connected to the front and rear ends of the outer surface of the housing (11). Mounting grooves (17) are opened on the outer surface of the mounting plates (14).

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