Compressor capacitor with built-in overvoltage cut-off protection mechanism

Abstract

The application relates to the technical field of electrical elements, and discloses a compressor capacitor with a built-in overvoltage cut-off protection mechanism, which comprises a metal shell, an electric capacity energy storage main body arranged in the inner cavity of the metal shell, an aluminum shell arranged in the inner cavity of the metal shell, a core package arranged in the aluminum shell, a pressure-bearing push disc slidingly arranged in the aluminum shell, a thimble arranged at the upper end of the pressure-bearing push disc, an overvoltage cut-off protection assembly arranged in the aluminum shell, a lever rotatingly arranged in the aluminum shell, an insulating sliding plate arranged at one end of the long side of the lever, an insulating base arranged in the aluminum shell, a conductive input seat and a conductive output seat arranged at the lower end of the insulating base, and a conductive pull sheet arranged at the upper end of the insulating sliding plate. The capacitor overvoltage grading early warning and reliable cut-off self-locking protection are realized through the lever torque amplification cooperation with the adjustable pressure regulating structure, the sensitivity is high, the adaptability is strong, and the safety hidden danger of overvoltage shell explosion is effectively eliminated.

Description

Technical Field

[0001] This invention relates to the field of electrical component technology, specifically to a compressor capacitor with a built-in overvoltage cut-off protection mechanism. Background Technology

[0002] Compressor capacitors are core electrical components in equipment such as air conditioners and refrigeration compressors. They primarily serve functions such as energy storage, phase shifting, and starting assistance, and operate under high-frequency, high-voltage conditions for extended periods. Long-term operation of capacitors can lead to dielectric breakdown and self-healing, resulting in the accumulation of high-pressure gas inside the casing. If this pressure cannot be released and power disconnected in time, it can easily cause the capacitor to bulge, catch fire, or even explode. Therefore, most compressor capacitors on the market are equipped with basic overvoltage protection structures to meet the basic safety protection requirements of the equipment.

[0003] Most existing compressor capacitor overvoltage protection structures adopt a fixed-stroke direct-push trigger structure without pressure regulation function and stroke amplification structure. Not only is the trigger air pressure threshold fixed and cannot be adapted to different working conditions, but the trigger stroke of the ejector pin is short and the driving force is insufficient, resulting in defects such as insensitive protection triggering and lack of early fault warning. At the same time, the traditional protection structure will automatically reset and power on as the air pressure drops after power failure, which can easily cause the equipment to restart and the safety hazard of electric shock to maintenance personnel. It cannot take into account the protection accuracy, working condition adaptability and maintenance safety.

[0004] Therefore, the applicant proposes a compressor capacitor with a built-in overvoltage cut-off protection mechanism. Summary of the Invention

[0005] The purpose of this invention is to provide a compressor capacitor with a built-in overvoltage cut-off protection mechanism to solve the following technical problems: the overvoltage protection threshold of existing compressor capacitors is not adjustable, the trigger sensitivity is poor, the graded early warning function is lacking, and it is easy to automatically reset and power on after overvoltage power failure, which poses a safety hazard of electric shock during equipment restart and maintenance.

[0006] The objective of this invention can be achieved through the following technical solutions: A compressor capacitor with a built-in overvoltage cut-off protection mechanism includes a metal shell, a capacitor energy storage body is disposed in the inner cavity of the metal shell, the capacitor energy storage body includes an aluminum shell disposed in the inner cavity of the metal shell, a core package is disposed inside the aluminum shell, a pressure-bearing push plate is slidably disposed inside the aluminum shell, and a push pin is disposed at the upper end of the pressure-bearing push plate. The aluminum shell is equipped with an overpressure cut-off protection component. The overpressure cut-off protection component includes a lever that is rotatably disposed inside the aluminum shell. One side of the short side of the lever is in contact with the ejector pin, and one end of the long side of the lever is equipped with an insulating sliding plate. An insulating base is provided inside the aluminum shell. A conductive input base and a conductive output base are provided at the lower end of the insulating base. A conductive pull tab is provided at the upper end of the insulating sliding plate.

[0007] As a further aspect of the present invention: wedge-shaped openings are provided on opposite sides of the conductive input socket and the conductive output socket, and the end of the conductive pull tab facing the wedge-shaped opening is configured as a wedge-shaped end.

[0008] As a further aspect of the present invention: the aluminum shell is provided with a pressure regulating component for adjusting the air pressure threshold required to trigger the overpressure cut-off protection component.

[0009] As a further aspect of the present invention: the pressure regulating component includes an insulating sleeve disposed on the upper end of the aluminum shell, an adjusting screw is threadedly connected inside the insulating sleeve, and a pressure regulating bushing is rotatably disposed at the end of the adjusting screw; An adjusting pin is slidably fitted inside the pressure adjusting bushing, and the lower end of the adjusting pin extends to the outside of the pressure adjusting bushing and is connected to an adjusting ball head.

[0010] As a further aspect of the present invention: a spring is sleeved on the outer surface of the adjusting pin shaft, which is disposed on the inner side wall of the pressure adjusting sleeve and the end of the adjusting pin shaft.

[0011] As a further aspect of the present invention: the pressure regulating assembly includes a torsion spring sleeved on the outer surface of the lever shaft.

[0012] As a further aspect of the present invention: a sealing top cover is provided at the upper end of the metal casing, and a cable sealing connector is provided at the lower end of the metal casing.

[0013] As a further aspect of the present invention: an insulating top plate is provided on the lower side of one end of the long side of the lever, and a conductive sheet is provided on one side of the insulating top plate; The aluminum shell has several disconnect terminals inside. One end of each disconnect terminal is connected to an external low-voltage circuit, and the other end is connected to a warning light.

[0014] As a further aspect of the present invention: a rotating handle is rotatably provided on the outer surface of the metal shell, one end of the rotating handle is connected to a rotating shaft, and one end of the rotating shaft extends into the aluminum shell and is provided with an eccentric block.

[0015] As a further aspect of the present invention: the inner wall of the metal shell is provided with a flame-retardant and fireproof lining.

[0016] The beneficial effects of this invention are: (1) The present invention is equipped with a lever-type overvoltage cut-off protection component, which adopts a differentiated lever structure with long and short arms. Based on the physical principle of lever torque amplification, the small axial displacement and pushing force of the ejector pin caused by the rise of air pressure inside the shell are amplified. Compared with the traditional direct-push trigger structure, it does not need to rely on a large stroke and large thrust to drive the mechanism to move. Structurally, it solves the defects of insufficient driving force and limited trigger stroke of the traditional protection mechanism, and effectively improves the stability and sensitivity of the overvoltage circuit breaking action.

[0017] (2) The present invention achieves axial position adjustment through the adjusting screw assembled with the internal thread of the insulating sleeve. In conjunction with the adjusting pin that is slidably connected inside the pressure adjusting bushing and the spring preload structure, the initial mating distance and the contact preload force between the pressure adjusting ball head and the ejector pin can be changed. By finely adjusting the triggering conditions through the mechanical structure, the air pressure threshold required for triggering the mechanism can be flexibly changed, adapting to the protection requirements of different working conditions and capacitors of different specifications, and the structure has stronger adaptability and versatility.

[0018] (3) This invention utilizes the continuous displacement characteristics of the lever deflection process, combined with an insulating top plate, conductive sheet, and disconnection terminals arranged at high and low positions that move in tandem with the lever, to decompose the single lifting stroke of the ejector pin into a two-stage linkage action. By triggering different early warning circuits through displacement grading, it realizes layered prompts for high gas pressure warning inside the capacitor shell and warning of approaching the circuit break threshold, thus predicting potential equipment failure hazards in advance.

[0019] (4) This invention is equipped with an external manual self-locking switch assembly. By rotating the handle, the internal rotating shaft and eccentric block are rotated. The mechanical holding principle of the non-circular contour of the eccentric block is used to limit and lock the bottom of the pressure-bearing push plate. After the capacitor is over-voltageed and the internal air pressure drops and is released, the pressure-bearing push plate and the ejector pin can be mechanically restricted to reset, locking the conductive circuit to the open state, eliminating the hidden danger of automatic power-on of the equipment. The fault self-locking is achieved by relying on a purely mechanical structure, which has higher safety and reliability.

[0020] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The invention will now be further described with reference to the accompanying drawings.

[0022] Figure 1 This is a three-dimensional structural diagram of the compressor capacitor of the present invention; Figure 2 This is a schematic diagram of the main structure of the compressor capacitor of the present invention; Figure 3 This is the present invention. Figure 2 Schematic diagram of the cross-sectional structure along section AA in the middle; Figure 4This is a schematic diagram of the voltage regulating component of the present invention; Figure 5 This is a schematic diagram of the overvoltage cut-off protection component and warning component of the present invention; Figure 6 This is the present invention. Figure 3 A magnified structural diagram at point B in the middle.

[0023] In the diagram: 101, metal casing; 102, sealed top cover; 103, cable sealing connector; 104, rubber-sheathed power cord; 201. Aluminum shell; 202. Core package; 203. Cover plate; 204. Pressure-bearing push plate; 205. Ejector pin; 301. Insulating sleeve; 302. Adjusting screw; 303. Pressure adjusting bushing; 304. Adjusting pin; 305. Pressure adjusting ball head; 306. Spring; 401. Lever; 402. Insulating sliding plate; 403. Conductive input base; 404. Conductive output base; 405. Conductive pull tab; 501. Insulating top plate; 502. Conductive sheet; 503. Disconnection terminal; 504. Warning light; 601. Rotating shaft; 602. Eccentric block. Detailed Implementation

[0024] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0025] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0026] Example 1 Please see Figures 1-3As shown, a compressor capacitor with a built-in overvoltage cutoff protection mechanism includes a metal casing 101, which is made of aluminum alloy and is cylindrical, housing all internal components. A sealing top cover 102 is provided at the upper end of the metal casing 101, and a cable sealing connector 103 is provided at the lower end. A rubber-sheathed power cord 104 is connected to the lower end of the cable sealing connector 103. The inner wall of the metal casing 101 is provided with a flame-retardant and fire-resistant lining, which can isolate high temperatures, inhibit the spread of combustion to the metal casing 101, and reduce the risk of the casing being damaged by high-temperature burning.

[0027] During normal operation, external electrical energy enters the capacitor aluminum shell 201 through the rubber-sheathed power cord 104 and the cable sealing joint 103, and is then transmitted to the core 202 via the internal conductive circuit and overvoltage cutoff protection component. The core 202 stores energy and shifts phases to provide the phase required for the compressor motor to operate. When the system is under continuous overvoltage, the dielectric of the core 202 repeatedly breaks down and heals itself, generating a large amount of gas. The gas pressure inside the capacitor aluminum shell 201 rises, which drives the overvoltage cutoff protection component to operate, breaking the conductive connection and permanently disconnecting the path between the core 202 and the rubber-sheathed power cord 104, thus avoiding the risk of bulging and bursting caused by continuous damage to the capacitor.

[0028] Preferably, please refer to Figure 3 As shown, a capacitor energy storage body is disposed within the inner cavity of the metal casing 101. The capacitor energy storage body includes an aluminum shell 201 disposed within the inner cavity of the metal casing 101. A core package 202 is disposed inside the aluminum shell 201. A fixing agent is disposed inside the aluminum shell 201, filling the space between the inner wall of the aluminum shell 201 and the core package 202, thereby limiting the axial and radial movement of the core package 202 and suppressing its displacement and shaking under equipment vibration conditions. A cover plate 203 is disposed at the upper end of the aluminum shell 201. Conductive lines are led out from the two poles of the core package 202, pass upward through the cover plate 203, and form an electrical connection with the overvoltage cut-off protection component. The overvoltage cut-off protection component is then connected to the rubber-sheathed power cord 104 at the lower end of the cable sealing connector 103 via conductive lines.

[0029] During normal operation, external electrical energy is delivered to the core package 202 via the rubber-sheathed power cord 104 and the overvoltage cut-off protection component. The core package 202 plays a role in energy storage and phase shifting, providing the phase conditions required for the operation of the compressor motor. Under continuous overvoltage conditions, the medium in the core package 202 undergoes repeated breakdowns and self-heals, generating gas. The internal gas pressure of the aluminum shell 201 increases, and the gas pressure drives the overvoltage cut-off protection component to operate, breaking the conductive circuit and permanently isolating the core package 202 from the external power supply line.

[0030] The aluminum shell 201 has a pressure-bearing push plate 204 inside, and a push pin 205 is provided at the upper end of the pressure-bearing push plate 204. The pressure-bearing push plate 204 is in close contact with the inner wall of the aluminum shell 201.

[0031] Preferably, please refer to Figure 3 As shown, in order to allow gas to escape and prevent liquid from contacting the pressure-bearing push plate 204, a microporous breathable diaphragm can be provided at the lower end of the pressure-bearing push plate 204 and inside the aluminum shell 201. The microporous breathable diaphragm is made of expanded polytetrafluoroethylene, which allows gas to pass through freely while intercepting solids and molten materials.

[0032] The gas generated by the fault can pass upward through the diaphragm to reach the pressure-bearing push plate 204, while blocking the molten medium and solid debris from contacting the pressure-bearing push plate 204 to prevent sliding and jamming; when the gas pressure inside the aluminum shell 201 increases, the gas pushes the pressure-bearing push plate 204 to slide upward, and the ejector pin 205 moves upward and triggers the overpressure cut-off protection component to disconnect the circuit.

[0033] Preferably, please refer to Figure 4 As shown, a pressure regulating assembly is provided inside the aluminum shell 201 and above the ejector pin 205. The pressure regulating assembly includes an insulating sleeve 301 located at the upper end of the aluminum shell 201. An adjusting screw 302 is threadedly connected inside the insulating sleeve 301. A pressure regulating bushing 303 is rotatably mounted at the end of the adjusting screw 302. An adjusting pin 304 is slidably fitted inside the pressure regulating bushing 303. The lower end of the adjusting pin 304 extends to the outside of the pressure regulating bushing 303 and connects to a pressure regulating ball head 305. The pressure regulating ball head 305 and the ejector pin 205 are arranged opposite each other along the same vertical line. Rotating the adjusting screw 302 can drive the pressure regulating ball head 305 to move axially, adjusting the distance between the pressure regulating ball head 305 and the ejector pin 205, thereby calibrating the pressure trigger threshold of the protection mechanism. A spring 306 is sleeved on the outer surface of the adjusting pin 304. One end of the spring 306 is connected to the inner wall of the pressure regulating bushing 303, and the other end is connected to the upper end of the adjusting pin 304. Spring 306 is mounted on the outside of adjusting pin 304. The preload of spring 306 counteracts the lifting thrust of pin 205. Together with adjusting screw 302, it can adjust the trigger air pressure threshold.

[0034] Example 2 Based on Example 1, please refer to Figure 5 As shown, an overpressure cut-off protection assembly is provided inside the aluminum shell 201. This assembly includes a lever 401 rotatably disposed inside the aluminum shell 201, positioned between the pressure regulating ball head 305 and the ejector pin 205. The upper end of the ejector pin 205 penetrates the aluminum shell 201 and extends to contact the lower end of the lever 401. The short side of the lever 401 contacts the ejector pin 205, and an insulating sliding plate 402 is provided at one end of the long side of the lever 401.

[0035] Preferably, the pressure regulating component can also be a torsion spring sleeved on the outer surface of the lever 401 shaft. By balancing the upward pushing force of the ejector pin 205 through the preload torque of the torsion spring, the air pressure threshold required for the ejector pin 205 to push the lever 401 to deflect can be changed by adjusting the preload torque of the torsion spring, thereby realizing adjustable trigger pressure.

[0036] An insulating base is provided inside the aluminum shell 201. A conductive input base 403 is provided on one side of the lower end of the insulating base. One end of the conductive input base 403 is connected to the lead wire of the core package 202. A conductive output base 404 is provided on the other side of the lower end of the insulating base. One end of the conductive output base 404 is connected to the cable sealing connector 103.

[0037] The upper end of the insulating sliding plate 402 is provided with a conductive pull tab 405. The conductive input seat 403 and the conductive output seat 404 are both provided with wedge-shaped openings on opposite sides. The end of the conductive pull tab 405 facing the wedge-shaped opening is provided as a wedge-shaped end.

[0038] Under normal operating conditions, the wedge-shaped end of the conductive pull tab 405 simultaneously engages with the wedge-shaped openings on both sides, connecting the conductive input base 403 and the conductive output base 404, allowing external electrical energy to be smoothly delivered to the core package 202 for energy storage and phase shifting. When the ejector pin 205 is lifted by air pressure and the insulating sliding plate 402 is displaced via the lever 401, the conductive pull tab 405 slides away from the wedge-shaped opening, breaking the conductive path and isolating the core package 202 from the external power supply line, thus avoiding the safety risks caused by capacitor overvoltage faults. The lever 401 amplifies the upward thrust of the ejector pin 205 using torque amplification, pushing the insulating sliding plate 402 to move, causing the conductive pull tab 405 to disengage from the wedge-shaped opening and thereby cutting off the conductive path.

[0039] Example 3 Based on Examples 1 and 2, please refer to Figure 5 The aluminum shell 201 shown has a warning component inside. The warning component includes an insulating top plate 501 located on the lower side of one long side of the lever 401. One side of the insulating top plate 501 is slidably engaged in a slot. A conductive sheet 502 is provided on one side of the insulating top plate 501. The aluminum shell 201 has several disconnection terminals 503 inside. One end of the disconnection terminal 503 is connected to an external low-voltage circuit, and the other end is connected to a warning light 504. The spacing between the several disconnection terminals 503 is greater than the length of the conductive sheet 502.

[0040] Warning light 504 includes a yellow light at the top and a red light at the bottom. Under normal conditions, the conductive plate 502 and the disconnected power terminal 503 are separated, and both warning lights 504 are off. When the internal air pressure of the aluminum shell 201 increases, the ejector pin 205 pushes the lever 401 to deflect, causing the insulating top plate 501 and the conductive plate 502 to move downward. The conductive plate 502 first connects to the upper terminal, and the yellow light illuminates, indicating that the internal air pressure is too high. As the air pressure continues to rise, the conductive plate 502 continues to move downward to connect to the lower terminal, and the red light illuminates, indicating that the air pressure is approaching the circuit break threshold. The graded light warning can provide layered feedback on the air pressure status inside the shell, making it easier for maintenance personnel to identify potential faults in advance, handle them in a timely manner, and avoid capacitors triggering circuit breaks or even safety accidents.

[0041] By utilizing the torque amplification characteristic of lever 401 to amplify the minute axial displacement of ejector pin 205, on the one hand, the stroke range can be expanded to realize two-level air pressure status recognition to trigger yellow and red light warnings respectively; on the other hand, the pushing force can be amplified to improve the response sensitivity of the separation action of conductive pull tab 405. Without lever 401, the stroke of ejector pin 205 itself is insufficient, making it difficult to realize graded warnings. At the same time, the driving force is too small, which can easily lead to problems such as delayed circuit breaking action and insensitive triggering.

[0042] Preferably, please refer to Figure 6 As shown, a switch assembly is installed inside the metal casing 101. The switch assembly is used to adjust the position of the pressure-bearing push plate 204. After the protection is cut off due to excessive pressure, even if the air pressure inside the aluminum casing 201 drops and is depressurized, the switch assembly can still restrict the pressure-bearing push plate 204 from moving down and resetting, maintaining the continuous disconnection of the conductive circuit and preventing the capacitor from resuming power on its own. The switch assembly can only be unlocked by manual operation, preventing accidental power-on of the equipment and avoiding the risk of electric shock to maintenance personnel during maintenance.

[0043] The switch assembly includes a rotating handle that is rotatably disposed on the outer surface of a metal housing 101. One end of the rotating handle extends into the interior of the metal housing 101 and is provided with a rotating shaft 601. A sealing ring is provided between the rotating shaft 601 and the metal housing 101. An eccentric block 602 is provided at one end of the rotating shaft 601 and extends into the aluminum housing 201.

[0044] Rotating the external rotating handle drives the rotating shaft 601 and the eccentric block 602 to rotate. The eccentric block 602 supports the bottom end of the pressure-bearing push plate 204 by relying on its eccentric contour, thereby locking the position of the pressure-bearing push plate 204. The sealing ring prevents the medium inside the shell from leaking outward.

[0045] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A compressor capacitor with a built-in overvoltage cutoff protection mechanism, comprising a metal casing (101), wherein a capacitor energy storage body is disposed in the inner cavity of the metal casing (101), the capacitor energy storage body comprising an aluminum shell (201) disposed in the inner cavity of the metal casing (101), and a core package (202) is disposed inside the aluminum shell (201), characterized in that, The aluminum shell (201) is slidably provided with a pressure-bearing push plate (204), and the upper end of the pressure-bearing push plate (204) is provided with a push pin (205). The aluminum shell (201) is provided with an overpressure cut-off protection component inside. The overpressure cut-off protection component includes a lever (401) that is rotatably disposed inside the aluminum shell (201). One side of the short side of the lever (401) is in contact with the ejector pin (205), and one end of the long side of the lever (401) is provided with an insulating sliding plate (402). An insulating base is provided inside the aluminum shell (201). A conductive input base (403) and a conductive output base (404) are provided at the lower end of the insulating base. A conductive pull tab (405) is provided at the upper end of the insulating sliding plate (402).

2. A compressor capacitor with a built-in overvoltage cutoff protection mechanism according to claim 1, characterized in that, The conductive input socket (403) and the conductive output socket (404) are both provided with wedge-shaped openings on opposite sides, and the end of the conductive pull tab (405) facing the wedge-shaped opening is provided as a wedge-shaped end.

3. A compressor capacitor with a built-in overvoltage cutoff protection mechanism according to claim 1, characterized in that, The aluminum shell (201) is equipped with a pressure regulating component inside, which is used to adjust the air pressure threshold required to trigger the overpressure cut-off protection component.

4. A compressor capacitor with a built-in overvoltage cutoff protection mechanism according to claim 3, characterized in that, The pressure regulating assembly includes an insulating sleeve (301) disposed on the upper end of the aluminum shell (201), an adjusting screw (302) is threadedly connected inside the insulating sleeve (301), and a pressure regulating bushing (303) is rotatably disposed at the end of the adjusting screw (302). The adjusting bushing (303) is internally slidably fitted with an adjusting pin (304), the lower end of which extends to the outside of the adjusting bushing (303) and is connected to an adjusting ball head (305).

5. A compressor capacitor with a built-in overvoltage cutoff protection mechanism according to claim 4, characterized in that, The outer surface of the adjusting pin (304) is fitted with a spring (306) which is disposed on the inner side wall of the pressure adjusting sleeve (303) and the end of the adjusting pin (304).

6. A compressor capacitor with a built-in overvoltage cutoff protection mechanism according to claim 3, characterized in that, The pressure regulating assembly includes a torsion spring sleeved on the outer surface of the lever (401) shaft.

7. A compressor capacitor with a built-in overvoltage cutoff protection mechanism according to claim 1, characterized in that, The upper end of the metal casing (101) is provided with a sealing top cover (102), and the lower end of the metal casing (101) is provided with a cable sealing connector (103).

8. A compressor capacitor with a built-in overvoltage cutoff protection mechanism according to claim 1, characterized in that, An insulating top plate (501) is provided on the lower side of one long side of the lever (401), and a conductive sheet (502) is provided on one side of the insulating top plate (501). The aluminum shell (201) has several disconnection terminals (503) inside. One end of the disconnection terminal (503) is connected to an external low-voltage circuit, and the other end is connected to a warning light (504).

9. A compressor capacitor with a built-in overvoltage cutoff protection mechanism according to claim 1, characterized in that, A rotating handle is rotatably provided on the outer surface of the metal shell (101). One end of the rotating handle is connected to a rotating shaft (601). One end of the rotating shaft (601) extends into the aluminum shell (201) and is provided with an eccentric block (602).

10. A compressor capacitor with a built-in overvoltage cutoff protection mechanism according to claim 1, characterized in that, The inner wall of the metal shell (101) is provided with a flame-retardant and fireproof lining.

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