Waterproof electrical switch for electrical engineering

Abstract

The utility model discloses a waterproof electrical switch for electrical engineering, which relates to the technical field of electrical switches and comprises a switch box and a relay, the rear side of the relay is provided with a sealing shell, the top of the sealing shell is provided with a top radiating fin, the side surface of the sealing shell is provided with a wavy side radiating fin, and the side wall of the switch box is provided with an air inlet grid. The bottom wall of the switch box is provided with an exhaust cylinder for discharging air in the switch box downwards, and the top wall of the switch box is provided with a low-temperature sheet with an isosceles triangle-shaped section and a downward tip end. According to the LED lamp, the side cooling fins are arranged to be in the wave shape, water drops flowing downwards can be prevented from directly falling down from the two cooling fins, the water drops are used for further cooling the side cooling fins, the exhaust cylinder is arranged, the cooling efficiency of the top cooling fins and the side cooling fins is improved, and the service life of the LED lamp is prolonged. The purpose of cooling protection of the interior of the relay is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical switches, in particular to a waterproof electrical switch for electrical engineering. Background Technique

[0002] An electrical switch is an electrical device used to control the on-off of a circuit. A waterproof electrical switch is an electrical switch with a special design that can effectively prevent moisture from invading and affecting its normal function. In some industrial production sites with water splashing, water mist or humid air, such as food processing plants, electroplating workshops, sewage treatment plants, etc., the waterproof electrical switch can prevent moisture from damaging the switch, improve the reliability and service life of the equipment, and reduce production interruptions caused by switch failures.

[0003] As a commonly used electrical engineering switch, when a large current passes through the circuit in a large-capacity circuit breaker, its contacts and connection parts will heat up due to resistance. If the heat dissipation is poor, it may cause the contacts to overheat and the insulation to age, affecting the performance and life of the circuit breaker, and even causing safety accidents. Since this kind of switch needs to have good sealing performance in a humid environment, to a certain extent, this will affect its heat dissipation effect, increase the temperature, accelerate the aging of components, shorten the service life of the switch, and even cause overheat protection or safety problems. In addition, to ensure waterproofing, the switch structure is compact, the heat dissipation space and method are limited, and only on the switch shell design, heat dissipation fins, heat dissipation grooves and other structures are used to increase the heat dissipation area and improve the heat dissipation efficiency.

[0004] A circuit breaker with heat dissipation under high load disclosed in the Chinese Utility Model Patent Application Publication Specification CN222562493U forms a heat dissipation structure through a heat conduction pad, a heat sink and a cooling fan, which can effectively improve the heat transfer efficiency, thereby indirectly improving the heat dissipation effect. However, when the cooling fan works, it dissipates heat by starting regularly, which cannot adapt to the working state of the circuit breaker, nor can it adjust the heat dissipation intensity according to the environment where the circuit breaker is located. Content of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model provides a waterproof electrical switch for electrical engineering, which solves the problems put forward in the above background technique.

[0006] To achieve the above object, the utility model is realized through the following technical solutions: including a switch box and a relay, the rear side of the relay is provided with a sealed shell, the top of the sealed shell is provided with a top heat sink, and the side of the sealed shell is provided with a wavy side heat sink;

[0007] An air intake grid is opened on the side wall of the switch box, an exhaust duct for discharging the air inside the switch box downward is provided on the bottom wall of the switch box, and a low-temperature sheet with an isosceles triangle cross-section and a pointed tip downward is provided on the top wall of the switch box.

[0008] Optionally, a sealing plate is provided in the middle of the relay and is hermetically connected to the inner wall of the switch box. The sealing plate and the sealing shell are integrally formed, and waterproof coatings are applied to the outside of the sealing plate, the sealing shell, the top heat sink, and the side heat sinks.

[0009] Optionally, a refrigeration box is provided in the middle of the top of the switch box. A semiconductor refrigeration chip is hermetically arranged inside the refrigeration box. A high-temperature sheet penetrating upward through the refrigeration box is arranged on the top of the semiconductor refrigeration chip, and the top of the low-temperature sheet penetrates through the bottom wall of the refrigeration box and is connected to the bottom of the semiconductor refrigeration chip.

[0010] Optionally, a heat dissipation motor is fixedly connected to the top of the exhaust duct through a connecting rod, and an exhaust fan blade is installed on the output shaft of the heat dissipation motor.

[0011] Optionally, a temperature measuring probe is provided at the bottom of the sealing shell, and a temperature control box is provided on the top wall of the switch box. A PLC controller is arranged inside the temperature control box, and the PLC controller controls the working states of the heat dissipation motor and the semiconductor refrigeration chip according to the temperature detected by the temperature measuring probe.

[0012] Optionally, the bottom wall of the switch box is provided as a drainage grid, and the drainage grid is composed of equally spaced arrays of long rods with a triangular cross-section.

[0013] Optionally, an air inlet filter is provided on the outer wall of the air inlet grid, and a protective net is provided at the bottom of the exhaust duct.

[0014] Optionally, a flip cover is movably connected to the top of the front side of the switch box through a hinge. A sealing strip is provided between the edge of the flip cover and the switch box. Magnets that attract each other are provided on the inner walls of the flip cover and the switch box. A rectangular groove is provided on the side wall of the flip cover, and a drying plate is pasted inside the rectangular groove. A wiring hole is provided on the bottom wall of the front side of the switch box, and a wire passes through the wiring hole to be electrically connected to the relay. Beneficial effects

[0015] The utility model provides a waterproof electrical switch for electrical engineering, which has the following beneficial effects:

[0016] For this waterproof electrical switch for electrical engineering, by providing an exhaust duct, the rotation of the exhaust fan blade inside the exhaust duct can be used to make the air circulate, accelerating the heat dissipation efficiency of the top heat sink and the side heat sinks, so as to quickly dissipate the heat on the sealing shell, achieving the purpose of cooling and protecting the inside of the relay.

[0017] For this waterproof electrical switch for electrical engineering, by providing a low-temperature sheet, according to the temperature on the surface of the sealing shell, when the temperature of the sealing shell is relatively high, the temperature of the low-temperature sheet can be controlled to decrease through the PLC controller, thereby cooling the inside of the switch box and further achieving the purpose of cooling and protecting the inside of the relay.

[0018] This waterproof electrical switch for electrical engineering can set the low-temperature sheet in a triangular shape. After the moisture in the air condenses into small water droplets on the low-temperature sheet, the water droplets can converge in the middle of the top heat sink, enabling the water droplets to stay on the top heat sink and the side heat sinks for a longer time, and fully dissipating heat from the top heat sink and the side heat sinks.

[0019] This waterproof electrical switch for electrical engineering can set the side heat sink in a wavy shape. After the moisture in the air contacts the low-temperature low-temperature sheet and condenses into small water droplets, it can prevent the downward-flowing water droplets from directly falling from between the two heat sinks, thereby using the water droplets to further cool the side heat sink.

[0020] This waterproof electrical switch for electrical engineering can ensure the seal with the switch box after the flip cover is closed by setting a magnet and a drying plate, and can also quickly dry the internal air through the drying plate to prevent the moisture in the external air from affecting the relay. Description of the Drawings

[0021] Figure 1 It is a side view three-dimensional structure schematic diagram of the present utility model;

[0022] Figure 2 It is a rear view sectional three-dimensional structure schematic diagram of the present utility model;

[0023] Figure 3 It is a side view sectional three-dimensional structure schematic diagram of the present utility model;

[0024] Figure 4 It is a top view three-dimensional structure schematic diagram of the exhaust duct of the present utility model;

[0025] Figure 5 It is a partial sectional structure schematic diagram of the refrigeration box of the present utility model;

[0026] Figure 6 It is a front view three-dimensional structure schematic diagram of the present utility model in the state where the flip cover is fully opened.

[0027] In the figure: 1. Switch box; 2. Flip cover; 3. Hinge; 4. Temperature control box; 5. High-temperature sheet; 6. Refrigeration box; 7. Inlet air filter; 8. Mounting plate; 9. Low-temperature sheet; 10. Air intake grid; 11. Top heat sink; 12. Side heat sink; 13. Sealing shell; 14. Temperature measurement probe; 15. Heat dissipation motor; 16. Exhaust duct; 17. Drainage grid; 18. Magnet; 19. Drying plate; 20. Exhaust fan blade; 21. Semiconductor refrigeration sheet; 22. Relay; 23. Sealing plate; 24. Wiring hole; 25. Bolt; 26. Mounting wall. Detailed Implementation Manner

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Embodiment

[0029] Please refer to Figures 1 to 6 , the present invention provides a technical solution: a waterproof electrical switch for electrical engineering, including a switch box 1 and a relay 22. An installation plate 8 is provided on the rear side wall of the switch box 1. The rear side of the relay 22 is a sealed housing 13. A top heat sink 11 is provided on the top of the sealed housing 13. A wavy side heat sink 12 is provided on the side of the sealed housing 13. A sealing plate 23 that is hermetically connected to the inner wall of the switch box 1 is provided in the middle of the relay 22. The sealing plate 23 is integrally formed with the sealed housing 13, and waterproof paint is applied to the outside of the sealing plate 23, the sealed housing 13, the top heat sink 11, and the side heat sink 12;

[0030] An air intake grille 10 is provided on the side wall of the switch box 1. An exhaust duct 16 for discharging the air inside the switch box 1 downward is provided on the bottom wall of the switch box 1. An air intake filter 7 is provided on the outer wall of the air intake grille 10. A protective net is provided at the bottom of the exhaust duct 16. A low-temperature sheet 9 with an isosceles triangle cross-section and a downward-pointing tip is provided on the top wall of the switch box 1. A refrigeration box 6 is provided in the middle of the top of the switch box 1. A semiconductor refrigeration sheet 21 is hermetically provided inside the refrigeration box 6. A high-temperature sheet 5 that penetrates upward through the refrigeration box 6 is provided on the top of the semiconductor refrigeration sheet 21. The top of the low-temperature sheet 9 penetrates the bottom wall of the refrigeration box 6 and is connected to the bottom of the semiconductor refrigeration sheet 21. Both the high-temperature sheet 5 and the low-temperature sheet 9 are aluminum sheets. The top of the semiconductor refrigeration sheet 21 is the high-temperature surface, and the bottom of the semiconductor refrigeration sheet 21 is the low-temperature surface. The generated high temperature is diffused to the outside through the high-temperature sheet 5. At the same time, the temperature of the low-temperature sheet 9 drops rapidly, cooling the air near the sealed housing 13. The semiconductor refrigeration sheet 21 can adopt a TEC1-12715 type refrigeration sheet, with a size of 40mm*40mm and a maximum power of up to 15*15 = 225W. At room temperature, the temperature of the low-temperature sheet 9 can be reduced to below zero in 15-20 seconds, facilitating the condensation of moisture in the air. The top of the exhaust duct 16 is fixedly connected to a heat dissipation motor 15 through a connecting rod. An exhaust fan blade 20 is installed on the output shaft of the heat dissipation motor 15. A temperature measuring probe 14 is provided at the bottom of the sealed housing 13. A temperature control box 4 is provided on the top wall of the switch box 1. A PLC controller is provided inside the temperature control box 4. The PLC controller controls the working states of the heat dissipation motor 15 and the semiconductor refrigeration sheet 21 according to the temperature detected by the temperature measuring probe 14. The bottom wall of the switch box 1 is a drainage grille 17, and the drainage grille 17 is composed of equally spaced long rods with a triangular cross-section.

[0031] During use, as the relay 22 gradually heats up during operation, the temperature measuring probe 14 transmits temperature data to the PLC controller, which controls the start of the cooling motor 15. The exhaust fan blade 20 is used to discharge the hot air near the sealed housing 13, and at the same time, the external low-temperature air enters from the air inlet filter 7 to dissipate heat from the top heat sink 11 and the side heat sinks 12.

[0032] When the temperature of the relay 22 further rises, the PLC controller controls the operation of the semiconductor refrigeration sheet 21 to further cool the air near the sealed housing 13. At the same time, when the relatively humid external air contacts the low-temperature sheet 9, moisture in the air will form small water droplets on the low-temperature sheet 9. The small water droplets fall from the bottom of the low-temperature sheet 9 and flow from both sides of the top heat sink 11 to the side heat sinks 12, using the formed water droplets to further cool the top heat sink 11 and the side heat sinks 12.

[0033] After the water droplets drip onto the drainage grid 17, they will fall from the gaps between the drainage grid 17. Since the gaps between the drainage grid 17 are larger at the top and smaller at the bottom, it is not only convenient for the water droplets to drain, but also prevents air from entering through the drainage grid 17 as much as possible. Embodiment

[0034] Please refer to Figures 1 to 6 , the present utility model provides a technical solution: a waterproof electrical switch for electrical engineering, including a switch box 1 and a relay 22. An installation plate 8 is provided on the rear side wall of the switch box 1. The rear side of the relay 22 is a sealed housing 13. A top heat sink 11 is provided on the top of the sealed housing 13, and a wavy side heat sink 12 is provided on the side of the sealed housing 13.

[0035] An air intake grid 10 is opened on the side wall of the switch box 1. An exhaust duct 16 for discharging the air inside the switch box 1 downward is provided on the bottom wall of the switch box 1. A low-temperature sheet 9 with an isosceles triangle cross-section and a downward tip is provided on the top wall of the switch box 1. A sealing plate 23 that is hermetically connected to the inner wall of the switch box 1 is provided in the middle of the relay 22. The sealing plate 23 is integrally formed with the sealed housing 13, and waterproof paint is applied to the outside of the sealing plate 23, the sealed housing 13, the top heat sink 11, and the side heat sinks 12. The top of the front side of the switch box 1 is movably connected to a flip cover 2 through a hinge 3. A sealing strip is provided between the edge of the flip cover 2 and the switch box 1. Magnets 18 that attract each other are provided on the inner walls of the flip cover 2 and the switch box 1. A rectangular groove is opened on the side wall of the flip cover 2, and a drying plate 19 is pasted inside the rectangular groove. A wiring hole 24 is opened on the bottom wall of the front side of the switch box 1. A wire passes through the wiring hole 24 to be electrically connected to the relay 22, and a sealing member or sealant is used to seal the wiring hole 24. An installation plate 8 is provided on the rear side of the switch box 1. Bolt holes are opened on the edge of the installation plate 8, and the installation plate 8 is fixedly installed on the installation wall 26 through bolts 25.

[0036] In use, the switch box 1 is installed on the installation wall 26 by inserting bolts 25 into the bolt holes on the mounting plate 8. The connected wires are inserted through the wiring holes 24 and connected to the relay 22. The gaps of the wiring holes 24 are sealed with seals or sealants. After the switch is turned on and off, the flip cover 2 is adsorbed on the switch box 1 by the magnet 18 to prevent the air inside the flip cover 2 from exchanging with the humid air outside. At the same time, the drying plate 19 can dry the air inside the flip cover 2, thereby improving the waterproof effect of the switch.

[0037] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A waterproof electrical switch for electrical engineering, comprising a switch box (1) and a relay (22), characterized in that: The rear side of the relay (22) is provided with a sealed shell (13), the top of the sealed shell (13) is provided with a top heat sink (11), and the side of the sealed shell (13) is provided with a wavy side heat sink (12); An air intake grille (10) is provided on a side wall of the switch box (1), an exhaust duct (16) for exhausting air inside the switch box (1) downward is provided on the bottom wall of the switch box (1), and a low-temperature sheet (9) having an isosceles triangle cross section and a downwardly pointed tip is provided on the top wall of the switch box (1).

2. The waterproof electrical switch for electrical engineering according to claim 1, characterized in that: A sealing plate (23) is provided in the middle of the relay (22) and is sealed to the inner wall of the switch box (1); the sealing plate (23) and the sealing shell (13) are integrally formed, and waterproof coating is applied to the outside of the sealing plate (23), the sealing shell (13), the top heat sink (11), and the side heat sink (12).

3. The waterproof electrical switch for electrical engineering according to claim 1, characterized in that: A refrigeration box (6) is arranged in the middle of the top of the switch box (1), a semiconductor refrigeration sheet (21) is arranged in a sealed manner inside the refrigeration box (6), a high-temperature sheet (5) is arranged on the top of the semiconductor refrigeration sheet (21) and penetrates upward through the refrigeration box (6), and the top of the low-temperature sheet (9) penetrates the bottom wall of the refrigeration box (6) and is connected to the bottom of the semiconductor refrigeration sheet (21).

4. The waterproof electrical switch for electrical engineering according to claim 3, characterized in that: The top of the exhaust cylinder (16) is fixedly connected to a heat dissipation motor (15) via a connecting rod, and an exhaust fan blade (20) is installed on the output shaft of the heat dissipation motor (15).

5. The waterproof electrical switch for electrical engineering according to claim 4, characterized in that: A temperature measuring probe (14) is provided at the bottom of the sealed shell (13), a temperature control box (4) is provided on the top wall of the switch box (1), a PLC controller is provided inside the temperature control box (4), and the PLC controller controls the working states of the heat dissipation motor (15) and the semiconductor refrigeration sheet (21) according to the temperature detected by the temperature measuring probe (14).

6. The waterproof electrical switch for electrical engineering according to claim 1, characterized in that: The bottom wall of the switch box (1) is provided as a drainage grid (17), and the drainage grid (17) is composed of an array of long rods with equal spacing and a triangular cross section.

7. The waterproof electrical switch for electrical engineering according to claim 1, characterized in that: An air inlet filter (7) is provided on the outer wall of the air inlet grille (10), and a protective net is provided on the bottom of the air exhaust cylinder (16).

8. The waterproof electrical switch for electrical engineering according to claim 1, characterized in that: The top of the front side of the switch box (1) is movably connected to a flip cover (2) via a hinge (3); a sealing strip is provided between the edge of the flip cover (2) and the switch box (1); the inner walls of the flip cover (2) and the switch box (1) are provided with magnets (18) that attract each other; a rectangular groove is provided on the side wall of the flip cover (2); a drying plate (19) is adhered inside the rectangular groove; a wiring hole (24) is provided on the bottom wall of the front side of the switch box (1); a wire passes through the wiring hole (24) and is electrically connected to the relay (22).

9. The waterproof electrical switch for electrical engineering according to claim 1, characterized in that: A mounting plate (8) is provided on the rear side of the switch box (1), bolt holes are provided on the edge of the mounting plate (8), and the mounting plate (8) is fixedly mounted on the mounting wall (26) by bolts (25).

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