Capacitor and compensation device

Abstract

The utility model provides a capacitor and a compensation device, and relates to the technical field of electrical components. The capacitor comprises a capacitor body, a bearing frame, a monitor and a controller, and the capacitor body is provided with a shell. The bearing frame is arranged outside the shell, and the monitor is arranged on the bearing frame. The monitor is used for monitoring the deformation quantity of the shell and generating a forming variable signal according to the deformation quantity. And the controller is electrically connected with the monitor and is used for receiving the deformation quantity signal and controlling on-off of a circuit where the capacitor is located according to the deformation quantity signal. The capacitor provided by the utility model is used for solving the problems of relatively low structural strength and relatively high sealing difficulty of the shell in the prior art.

Description

Technical Field

[0001] The present application relates to the technical field of electrical components, and in particular to a capacitor and a compensation device. Background Art

[0002] Capacitors are fundamental components widely used in electronic devices. When a capacitor fails and internal pressure rises, there's a risk of dangerous situations, such as expansion and deformation of the capacitor casing, or even explosion.

[0003] In order to ensure that the consequences of capacitor failure are controllable, explosion-proof capacitors came into being.

[0004] Existing explosion-proof capacitors typically consist of a housing and an explosion-proof structure within the housing. In practice, a signal line is required to detect the operating status of the explosion-proof structure and determine the capacitor's operating status. Specifically, one end of the signal line is connected to the explosion-proof structure, while the other end passes through the housing and connects to a controller located outside the housing.

[0005] In this case, a hole needs to be opened on the housing for the signal line to pass through, which not only reduces the structural strength of the housing but also increases the difficulty of sealing the housing. Utility Model Content

[0006] The present application provides a capacitor and a compensation device to solve the problems in the prior art of low structural strength of the housing and greater sealing difficulty.

[0007] In a first aspect, the present application provides a capacitor comprising a capacitor body, a carrier, a monitor, and a controller, wherein the capacitor body comprises a housing. The carrier is disposed outside the housing, and the monitor is disposed on the carrier. The monitor is configured to monitor a deformation of the housing and generate a deformation signal based on the deformation. The controller is electrically connected to the monitor, configured to receive the deformation signal and control the on / off state of a circuit in which the capacitor is located based on the deformation signal.

[0008] With this technical solution, the support frame is located outside the housing, and the monitor is mounted on the support frame. This means that the monitor is located outside the housing. Compared to existing technologies, when connecting the monitor to the controller, there is no need to create additional holes in the housing for signal cables to pass through, simplifying the installation process while avoiding compromising the housing's structural strength. Furthermore, there is no need to seal the holes for signal cables, reducing the difficulty of sealing the housing.

[0009] In one possible design, the housing includes a top plate, a bottom plate, and a surrounding plate located between the top plate and the bottom plate. The support frame is located on a side of the top plate away from the bottom plate, and the monitor is used to monitor the deformation of the top plate.

[0010] When using this technical solution, after the monitor is mounted on the support frame, it is positioned above the capacitor and within the housing's housing. The housing protects the monitor, preventing operators from accidentally touching it, which could alter the relative position of the monitor's monitoring terminal and the top plate and affect monitoring accuracy. Furthermore, the monitor's location within the housing's housing prevents it from being exposed to dust and debris, thereby ensuring its sensitivity.

[0011] In one possible design, the monitor is located at the geometric center of the carrier.

[0012] When the above technical solution is adopted, the working status of the capacitor body can be accurately obtained, and the circuit where the capacitor is located can be cut off in time to avoid more serious consequences.

[0013] In a possible design, the supporting frame is snap-connected to the top plate.

[0014] In one possible design, a storage space is formed between the top plate, the bottom plate, and the enclosure. The enclosure has a first end and a second end that are arranged opposite to each other, and the top plate is arranged at the first end. The four edges of the first end are provided with a first bent portion that is bent away from the storage space and toward the bottom plate. The top plate includes an end cover, a second bent portion, a third bent portion, and a fourth bent portion that are connected in sequence. The four edges of the end cover are in contact with the inner wall of the enclosure. The second bent portion extends from the end cover in a direction away from the storage space. One side of the third bent portion is connected to the side of the second bent portion away from the end cover, and the other side of the third bent portion extends in a direction away from the storage space and toward the bottom plate. One side of the fourth bent portion is connected to the other side of the third bent portion, and the other side of the fourth bent portion extends toward the storage space and away from the bottom plate. The first bent portion is located between the third bent portion and the fourth bent portion.

[0015] When the above technical solution is adopted, a five-layer roll structure consisting of the enclosure, the first bending part, the second bending part, the third bending part and the fourth bending part is formed at the connection position between the top plate and the enclosure, ensuring the connection strength between the enclosure and the top plate.

[0016] At the same time, the inner and outer walls of the enclosure are tightly fitted with the second bend portion and the fourth bend portion respectively, and the inner and outer walls of the first bend portion are tightly fitted with the fourth bend portion and the third bend portion respectively, thereby effectively improving the structural strength of the shell while ensuring the sealing performance between the top plate and the enclosure.

[0017] In a possible design, the carrier is straddled on the top plate. A flange is provided at a position where the carrier is connected to the top plate, and the flange is closely attached to the third bent portion.

[0018] When the above technical solution is adopted, flanges are provided on both sides of the length direction of the carrier. The two flanges are tightly fitted with the third bent portions on the corresponding sides, so that the carrier is clamped on the top plate by the two flanges.

[0019] In one possible design, the monitor is a micro switch, and an actuating reed of the micro switch is used to contact the end cover.

[0020] When the above technical solution is adopted, the contact spacing of the micro switch is small, the action stroke is short, the pressing force is small, and the switching is fast. When the deformation of the end cover exceeds the threshold, the signal can be transmitted to the controller in time to quickly cut off the current of the circuit where the capacitor is located.

[0021] In a possible design, the monitor is a distance sensor, which is used to monitor the distance between the end cap and the distance sensor.

[0022] In one possible design, the carrier is bonded to the housing.

[0023] When the above technical solution is adopted, the connection methods between the support frame and the shell are enriched, which makes it easier to select and set according to actual conditions.

[0024] In a second aspect, the present application provides a compensation device, comprising a cover and a capacitor as described in any possible implementation of the first aspect. The cover is disposed on the top surface of the capacitor.

[0025] The beneficial effects of the compensation device provided in the second aspect can be referred to the beneficial effects brought about by the various possible implementation methods of the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the structure of a capacitor provided in an embodiment of the present application.

[0027] Figure 2 for Figure 1 Enlarged schematic diagram of point A in the middle.

[0028] Figure 3 A schematic top view of a capacitor provided in an embodiment of the present application.

[0029] Figure 4 for Figure 3 Schematic cross-sectional view at the middle BB.

[0030] Figure 5 for Figure 4 Enlarged schematic diagram at point C in the middle.

[0031] Figure 6 for Figure 4 and Figure 5 Enlarged schematic diagram at point D in the middle.

[0032] Reference numerals:

[0033] 100-capacitor, 10-capacitor body, 11-housing, 111-top plate, 1111-end cover, 1112-second bending portion,

[0034] 1113-third bending portion, 1114-fourth bending portion, 1115-groove, 112-bottom plate, 113-enclosing plate, 1131-first bending portion,

[0035] 20-carrying frame, 21-flange, 211-covering portion, 212-folding portion, 22-limiting groove, 30-monitor, 31-action reed. DETAILED DESCRIPTION

[0036] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover non-exclusive inclusions.

[0038] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor does it necessarily refer to independent or alternative embodiments that are mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0039] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the current limiting module of the present application. For example, in the description of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application.

[0040] In addition, the terms "first", "second", etc. in the description and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order, and may explicitly or implicitly include one or more such features.

[0041] In the description of this application, unless otherwise specified, "plurality" means more than two (including two), and similarly, "multiple groups" means more than two (including two).

[0042] In the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly. For example, "connected" or "connected" in a mechanical structure can refer to a physical connection. For example, a physical connection can be a fixed connection, such as a fixed connection via a barrier, such as a screw, bolt, or other barrier. A physical connection can also be a removable connection, such as a snap-fit ​​connection. A physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances. "Connected" or "connected" in a circuit structure can refer not only to a physical connection, but also to an electrical connection or a signal connection. For example, it can be a direct connection, i.e., a physical connection, or an indirect connection through at least one intermediate component, as long as circuit connectivity is achieved. It can also refer to internal communication between two components. A signal connection can refer not only to signal connection through an electrical circuit, but also to signal connection through a media medium, such as radio waves. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0043] First, it's important to note that capacitors have polarity. The internal structure and materials of a capacitor determine the specific positions and functions of its positive and negative electrodes during design and manufacturing. When a capacitor is properly installed, its positive and negative electrodes connect as designed, achieving its intended functions, such as energy storage and filtering.

[0044] In actual use, a capacitor often has components such as a circuit breaker and a magnetic latching relay installed on one side. To prevent breakage of internal components and damage to the capacitor itself, thereby ensuring safe circuit operation and extending the capacitor's service life, the capacitor is typically placed with the side with the circuit breaker and magnetic latching relay installed facing upward. Therefore, in the embodiments provided herein, the side of the capacitor used to mount components such as a circuit breaker and a magnetic latching relay is defined as the top surface of the capacitor.

[0045] The present application provides a compensation device, which includes a cover and a Figure 1 The capacitor 100 shown in FIG. 1 is a capacitor 100 , wherein the cover is disposed on the top surface of the capacitor 100 .

[0046] Thus, in a specific implementation, components such as the circuit breaker and magnetic latching relay installed on the top surface of the capacitor 100 can be arranged in the cover space of the cover. The cover has a protective function for the components installed on the top surface of the capacitor 100, preventing operators from accidentally touching the components and damaging the components. The setting of the cover can also prevent dust, debris, etc. from contaminating the components installed on the top surface of the capacitor 100. At the same time, the components installed on the top surface of the capacitor 100 are shielded by the cover and will not appear messy, which can increase the aesthetics of the compensation device provided by the embodiment of the present application and enhance the overall visual effect.

[0047] In practice, when a capacitor fails and internal pressure rises, it can cause the capacitor housing to expand and deform, bulging outward, potentially posing a dangerous risk. Capacitor explosions can have serious consequences, including casualties, fire, disruptions to normal production, and the possibility of secondary or multiple explosions.

[0048] In order to ensure that the consequences of capacitor failure are controllable, explosion-proof capacitors came into being.

[0049] In the prior art, the explosion-proof structure of an explosion-proof capacitor is generally located inside a housing. In specific implementation, a signal line is required to derive the working status of the explosion-proof structure in order to determine the working status of the capacitor.

[0050] Specifically, one end of the signal line is connected to the explosion-proof structure, and the other end needs to pass through the shell and be connected to the controller located outside the shell.

[0051] In this case, a hole needs to be opened on the housing for the signal line to pass through, which not only reduces the structural strength of the housing but also increases the difficulty of sealing the housing.

[0052] For this reason, see Figure 1As shown, an embodiment of the present application provides a capacitor 100, comprising a capacitor body 10, a carrier 20, a monitor 30 and a controller, wherein the capacitor body 10 has a housing 11. The carrier 20 is disposed outside the housing 11, and the monitor 30 is disposed on the carrier 20. The monitor 30 is used to monitor the deformation of the housing 11 and generate a deformation signal based on the deformation. The controller is electrically connected to the monitor 30, and the controller is used to receive the deformation signal and control the on / off of the circuit in which the capacitor 100 is located based on the deformation signal.

[0053] In actual situations, the housing 11 may be a columnar structure, a rectangular parallelepiped structure, etc. The material of the housing 11 may be frosted tinplate, stainless steel, etc., but is not limited thereto and is subject to actual circumstances.

[0054] The supporting frame 20 is used to support the monitor 30 . The supporting frame 20 needs to be fixedly installed outside the housing 11 to provide a stable supporting force for the monitor 30 .

[0055] The support frame 20 can be made of plastic, and the structure of the support frame 20 can be a plate structure, a grid structure or a long strip structure, etc., so as to be firmly installed outside the shell 11 and provide stable support force for the monitor 30.

[0056] When the support frame 20 is a plate-like structure, the portion of the support frame 20 corresponding to the monitor 30 can be bent away from the capacitor body 10 to form a mounting portion. Simultaneously, a through hole is formed in the support frame 20. In this case, the monitor 30 can be mounted on the mounting portion, with the monitoring end of the monitor 30 corresponding to the through hole, so that the monitor 30 can monitor the deformation of the housing 11.

[0057] In addition, configuring the support frame 20 as a grid-like structure or a long strip-like structure can reduce the material usage of the support frame 20 , reduce the weight of the support frame 20 , and thus reduce the load on the housing 11 .

[0058] Further, see Figure 2 As shown, when the support frame 20 is a long strip structure, a limiting groove 22 can be opened on the support frame 20 of the long strip structure. The limiting groove 22 can pass through the support frame 20 along the length direction of the support frame 20 of the long strip structure, and the size of the limiting groove 22 matches the monitor 30.

[0059] In this way, the monitor 30 can be installed in the limiting groove 22 .

[0060] Specifically, the monitor 30 can be detachably connected to the carrier 20. When the relative position of the monitor 30 and the carrier 20 needs to be changed, the monitor 30 can be detached from the carrier 20 and moved within the limiting groove 22 along the length of the limiting groove 22. After moving to a certain position, the monitor 30 can be detachably connected to the carrier 20 to adjust the monitoring position of the monitor 30 according to actual needs.

[0061] In practice, the monitoring position of the monitor 30 is set according to actual needs, so that when the monitor 30 moves along the length of the limit slot 22, the inner wall of the limit slot 22 guides the monitor 30. After the monitor 30 is moved to a certain position and connected to the carrier 20, the side walls of the limit slot 22 limit the monitor, preventing the position of the monitor 30 relative to the housing 11 from changing, which would reduce monitoring accuracy.

[0062] In addition, the connection method between the support frame 20 and the housing 11 is not specifically limited here. For example, the support frame 20 can be welded, clamped or riveted to the housing 11, etc., depending on the actual situation.

[0063] After the monitor 30 is mounted on the support frame 20, the monitoring terminal of the monitor 30 can sense the housing 11. The monitor 30 can monitor the deformation of the housing 11 in real time. Alternatively, the monitor 30 can monitor the deformation of the housing 11 at predetermined intervals and generate a deformation signal based on the detected deformation. The controller is electrically connected to the monitor 30, and after generating the deformation signal, the monitor 30 can transmit the deformation signal to the controller.

[0064] During specific implementation, the controller has a storage unit, and the deformation threshold of the shell 11 can be stored in the storage unit in advance.

[0065] After receiving the deformation variable signal, the controller may obtain a corresponding deformation variable according to the deformation variable signal, and compare the deformation variable with a deformation variable threshold pre-stored in the storage unit.

[0066] When the deformation amount is less than the deformation amount threshold, the controller determines that the capacitor body 10 is in a normal working state. When the deformation amount is greater than or equal to the deformation amount threshold, it is considered that the internal air pressure of the capacitor body 10 is high, causing the housing 11 to deform, and the deformation amount exceeds the deformation amount threshold, and the capacitor body 10 is determined to be in an abnormal working state.

[0067] When the controller determines that the capacitor body 10 is in an abnormal working state, in order to avoid excessive air pressure inside the capacitor body 10, or even the expansion and cracking of the shell 11 and the explosion of the capacitor body 10, the controller can control the circuit where the capacitor 100 is located to be disconnected.

[0068] Specifically, when the deformation of the shell 11 monitored by the monitor 30 received by the controller is greater than or equal to the deformation threshold, the controller can send a disconnect signal to the magnetic holding relay or thyristor to control the magnetic holding relay or thyristor to disconnect, thereby disconnecting the circuit where the capacitor 100 is located.

[0069] In a specific implementation, the controller may be a microcontroller unit (MCU) or a central processing unit (CPU), etc., and is not specifically limited in the embodiments of the present application.

[0070] The controller is electrically connected to the monitor 30. The electrical connection method described here can be a serial port connection, a network connection, a two-bus based wiring method (such as RS-485 bus), an analog signal interface connection, etc. The specific electrical connection method needs to be determined according to the specific model and technical specifications of the equipment.

[0071] In summary, when the deformation of the housing 11 monitored by the monitor 30 received by the controller is greater than or equal to the deformation threshold, the controller can control the disconnection of the circuit in which the capacitor 100 is located to prevent the capacitor body 10 from exploding. Therefore, the capacitor 100 provided in this application also has an explosion-proof function and can also be referred to as an explosion-proof capacitor. To simplify the description, the explosion-proof capacitor provided in this application is simply referred to as a capacitor.

[0072] In the embodiment provided in this application, since the carrier 20 is arranged outside the housing 11, and the monitor 30 is installed on the carrier 20. This shows that the monitor 30 is located outside the housing 11, please refer to Figures 1 to 3 In specific implementation, the monitor 30 can be electrically connected to the controller directly using a signal line outside the housing 11 .

[0073] In the prior art, a controller determines the operating status of a capacitor based on the operating status of an explosion-proof structure. In the present application, the controller determines the operating status of a capacitor based on a deformation signal transmitted by a monitor. The monitor 30 provided in the present application is equivalent to the explosion-proof structure in the prior art.

[0074] Compared to the prior art, the capacitor 100 provided in this application eliminates the need for additional holes in the housing 11 for signal wires to pass through when connecting the monitor 30 to the controller, simplifying the installation process while avoiding reducing the structural strength of the housing 11. Furthermore, there is no need to seal the holes for signal wires, reducing the difficulty of sealing the housing 11.

[0075] In one possible implementation, in order to obtain the working status of the capacitor body 10 more timely, in the embodiment provided in the present application, multiple monitors 30 can be set, and the multiple monitors 30 monitor whether the shell 11 is deformed from multiple directions of the shell 11.

[0076] For example, the monitor 30 may be provided on the top, bottom or side of the housing 11. When the housing 11 is a rectangular parallelepiped, the monitor 30 may be provided on each surface of the rectangular parallelepiped housing 11.

[0077] The number of controllers can be one. In this case, when there are multiple monitors 30, one controller can be electrically connected to multiple monitors 30. Of course, the number of controllers can also be multiple. When there are multiple monitors 30, one controller can be electrically connected to one or more monitors. This is not specifically limited here.

[0078] Considering cost, a single controller can be provided, with multiple monitors 30 electrically connected to the controller. In this case, when the deformation detected by any monitor 30 is greater than or equal to the deformation threshold, the controller can disconnect the circuit containing the capacitor 100 to prevent the capacitor 100 from exploding.

[0079] As a possible implementation, see Figure 1 and Figure 4 As shown, the housing 11 includes a top plate 111 and a bottom plate 112 that are arranged opposite each other, and an enclosure 113 located between the top plate 111 and the bottom plate 112. The enclosure 113 has a cavity extending through both ends. The edges of the top plate 111 are connected to one end of the enclosure 113, and the edges of the bottom plate 112 are connected to the other end of the enclosure 113. The cavity formed by the enclosure extends from the top plate 111 to the bottom plate 112.

[0080] The top plate 111 and the bottom plate 112 are oppositely arranged at two ends of the enclosure 113 , and the outer contours of the top plate 111 and the bottom plate 112 may be the same.

[0081] It should be noted here that, in the embodiment provided in this application, the top surface of the capacitor 100 and the top surface of the housing 11 refer to the side of the housing 11 away from the bottom plate 112 .

[0082] During actual processing, a plate-like structure may be formed according to the outer contour of the top plate 111 or the bottom plate 112 . The formed plate-like structure may serve as either the bottom plate 112 or the top plate 111 .

[0083] The structures of the top plate 111 and bottom plate 112 match those of the enclosure 113. It should be noted that when the housing 11 is a cylindrical structure, the top plate 111 and bottom plate 112 are both circular, and the enclosure 113 is a hollow cylinder. The enclosure 113 can be formed from a rectangular plate. For example, the rectangular plate can be bent and its two parallel sides sealed together to form the enclosure 113.

[0084] When the housing 11 is a rectangular parallelepiped structure, the top plate 111 and the bottom plate 112 are both rectangular, and the enclosure 113 is a hollow rectangular parallelepiped structure. The enclosure 113 can be formed by bending a rectangular plate in one go, or it can be welded from multiple plates. Of course, this is merely an example and is not intended to be limiting.

[0085] For the convenience of description, this article will only use the case where the housing 11 is a rectangular parallelepiped structure and the supporting frame 20 is a rectangular plate as an example for explanation.

[0086] In practice, the monitor 30 can be used to monitor the deformation of the bottom plate 112 or the top plate 111, or the deformation of the enclosure 113. Accordingly, the support frame 20 matches the monitor 30 and is installed at a corresponding position of the housing 11.

[0087] As an example, Figures 1 to 5 As shown, the carrier 20 is disposed on a side of the top plate 111 away from the bottom plate 112 , and the monitor 30 is used to monitor the deformation of the top plate 111 .

[0088] Thus, after the monitor 30 is mounted on the support frame 20, the monitor 30 is located above the capacitor body 10 and within the housing space of the housing. The housing protects the monitor 30, preventing the operator from accidentally touching it, which could change the relative position between the monitoring end of the monitor 30 and the top plate 111 and affect monitoring accuracy. Furthermore, since the monitor 30 is located within the housing space of the housing, it is not exposed to the outside world, preventing dust, debris, and the like from contaminating the monitor 30 and ensuring the sensitivity of the monitor 30.

[0089] When the internal air pressure of the capacitor body 10 is high, causing the shell 11 to deform, the shell 11 will expand outward. Correspondingly, the top plate 111 bulges upward. That is, the top plate 111 is subjected to a force from the internal air pressure in the direction away from the bottom plate 112, and the edges of the top plate 111 are connected to the enclosure 113, and the edges of the top plate 111 are subjected to a force from the enclosure 113 to move closer to the bottom plate 112. Under the action of the enclosure 113 and the air pressure inside the capacitor body 10, the top plate 111 is in the shape of an upwardly convex arc.

[0090] It can be understood that when no other components are installed on the top plate 111 , the geometric center of the top plate 111 bulges the highest, that is, the deformation amount at the geometric center of the top plate 111 is the largest.

[0091] In this case, the monitor 30 may be configured to monitor the deformation at the geometric center of the top plate 111 .

[0092] In this way, the monitor 30 can obtain the deformation amount at the maximum deformation position of the top plate 111 to accurately obtain the working status of the capacitor body 10 and cut off the circuit where the capacitor 100 is located in time to avoid more serious consequences.

[0093] However, the reality is that other components are often installed on the top plate 111. When components are installed on the top plate 111, a force is applied to the top plate 111 to move closer to the bottom plate 112, affecting the monitoring of the deformation of the top plate 111.

[0094] Therefore, in one feasible manner, the monitor 30 is disposed at the geometric center of the carrier 20. In this case, the monitor 30 is used to monitor the deformation of the top plate 111 at the position corresponding to the geometric center of the carrier 20.

[0095] It should be noted that in the embodiment provided in this application, the geometric center of the top plate 111 is the intersection of the two diagonals of the top plate 111. The geometric center of the carrier 20 is the intersection of the two diagonals of the carrier 20.

[0096] After the carrier 20 is mounted on the top plate 111 , the geometric center of the carrier 20 is located on the mid-vertical plane of the top plate 111 in one direction.

[0097] For example, Figure 1 As shown, when the length direction of the carrier 20 is parallel to the width direction of the top plate 111 , the geometric center of the carrier 20 is located on the mid-vertical plane parallel to the length direction of the top plate 111 .

[0098] In addition, it can be understood that when the length direction of the carrier 20 is parallel to the length direction of the top plate 111 , the geometric center of the carrier 20 is located on the mid-vertical plane parallel to the width direction of the top plate 111 .

[0099] In actual situations, the support frame 20 can be kept at a certain distance from other components installed on the top plate 111 to prevent the arrangement of other components from affecting the monitoring of the deformation of the top plate 111. This allows for accurate acquisition of the working status of the capacitor body 10 and timely disconnection of the circuit where the capacitor 100 is located to avoid more serious consequences.

[0100] Currently, the wall thickness of the housing 11 is relatively thin, typically 0.25mm to 0.35mm. When welding the support frame 20 to the housing 11, welding perforations or poor sealing can easily occur, leading to problems such as filler leakage or air pressure leakage within the capacitor body 10.

[0101] In view of this, in the embodiment provided in the present application, the support frame 20 is snap-fitted to the top plate 111 or the support frame 20 is bonded to the housing 11. There is no need to weld the support frame 20 to the housing 11, which avoids the phenomenon of perforation or poor sealing of the housing 11. Furthermore, it avoids problems such as the filling material inside the capacitor body 10 flowing out or the air pressure inside the capacitor body 10 leaking. In addition, the support frame 20 is snap-fitted or welded to the top plate 111, which enriches the connection method between the support frame 20 and the housing 11, making it easy to select and set according to actual conditions.

[0102] In some embodiments, as Figure 1 and Figure 4 As shown, a receiving space is formed between the top plate 111, the bottom plate 112 and the surrounding plate 113. The top plate 111 and the surrounding plate 113, as well as the bottom plate 112 and the surrounding plate 113, are sealed.

[0103] See also Figure 5 and Figure 6 As shown, the enclosure 113 has a first end and a second end opposite to each other, and the top plate 111 is disposed at the first end. The first end is provided with a first bending portion 1131 disposed around the periphery thereof, facing away from the accommodation space and bending toward the bottom plate 112.

[0104] The structure of the enclosure 113 may be an integrated structure to ensure the structural strength of the enclosure 113. Of course, the invention is not limited thereto.

[0105] like Figure 6 As shown, the top plate 111 includes an end cap 1111, a second bent portion 1112, a third bent portion 1113, and a fourth bent portion 1114 connected in sequence. The top plate 111 may be an integrated structure to ensure the structural strength of the top plate 111. Of course, the present invention is not limited thereto.

[0106] In one possible implementation, Figure 6 As shown, the edges of the end cap 1111 are in contact with the inner wall of the enclosure 113, and the second bend 1112 extends from the end cap 1111 away from the storage space. One side of the third bend 1113 is connected to the side of the second bend 1112 away from the end cap 1111, and the other side of the third bend 1113 extends away from the storage space and toward the bottom plate 112. One side of the fourth bend 1114 is connected to the other side of the third bend 1113, and the other side of the fourth bend 1114 extends toward the storage space and away from the bottom plate 112. The first bend 1131 is located between the third bend 1113 and the fourth bend 1114.

[0107] In this way, a five-layer roll structure consisting of the enclosure 113, the first bending portion 1131, the second bending portion 1112, the third bending portion 1113 and the fourth bending portion 1114 is formed at the connection position between the top plate 111 and the enclosure 113, ensuring the connection strength between the enclosure 113 and the top plate 111.

[0108] At the same time, the inner and outer wall surfaces of the enclosure 113 are tightly fitted with the second bending portion 1112 and the fourth bending portion 1114, respectively, and the inner and outer wall surfaces of the first bending portion 1131 are tightly fitted with the fourth bending portion 1114 and the third bending portion 1113, respectively, thereby effectively improving the structural strength of the shell 11 while ensuring the sealing performance between the top plate 111 and the enclosure 113.

[0109] It should be pointed out that, referring to Figure 5 As shown, a groove 1115 opening upward is formed between the end cover 1111 and the second bent portion 1112 .

[0110] As an example, Figure 1 、 Figure 3 and Figure 5 As shown, the carrier 20 straddles the top plate 111. That is, the carrier 20 straddles the top plate 111, and the two ends of the carrier 20 along the length direction are connected to the top plate 111.

[0111] like Figure 5 and Figure 6 As shown, a flange 21 is provided at the position where the carrier 20 is connected to the top plate 111 , and the flange 21 is tightly attached to the third bending portion 1113 .

[0112] Both sides of the carrier 20 in the longitudinal direction are provided with flanges 21. The two flanges 21 are tightly fitted with the third bent portions 1113 on the corresponding sides, so that the carrier 20 is clamped on the top plate 111 by the two flanges 21.

[0113] In practice, see Figure 6 As shown, the flange 21 may include a covering portion 211 and a folded portion 212. The covering portion 211 is tightly attached to the third bent portion 1113. One side of the folded portion 212 is connected to the side of the covering portion 211 near the bottom plate 112, while the other side of the folded portion 212 extends toward the receiving space. The side of the third bent portion 1113 near the bottom plate 112 is pressed against the folded portion 212.

[0114] In this way, the connection stability between the carrier 20 and the housing 11 can be improved, ensuring that the relative position of the monitor 30 mounted on the carrier 20 and the housing 11 does not change, thereby ensuring monitoring accuracy.

[0115] In one example, Figure 2 、 Figure 4 and Figure 5 As shown, the monitor 30 is a micro switch, and the action reed 31 of the micro switch is used to contact the end cover 1111.

[0116] In this case, the micro switch is mounted on the mounting portion of the carrier 20. The action reed 31 of the micro switch passes through the through hole and contacts the end cover 1111. At the same time, the portion of the action reed 31 near the end cover 1111 is located in the groove 1115, reducing the space occupied by the micro switch.

[0117] The micro switch has a small contact spacing, a short action stroke, a small pressing force, and a fast switching. When the deformation of the end cover 1111 exceeds the deformation threshold, it can transmit a signal to the controller in time to quickly cut off the current in the circuit where the capacitor 100 is located.

[0118] Specifically, the action reed 31 of the microswitch is always in contact with the end cover 1111. As the air pressure in the capacitor body 10 gradually increases, the deformation of the end cover 1111 gradually increases. In the process of gradually increasing the deformation of the end cover 1111, the end cover 1111 drives the end of the action reed 31 in contact with the end cover 1111 to move upward. When the end of the action reed 31 in contact with the end cover 1111 moves upward a certain distance (exemplarily, 2.5 mm), the microswitch is triggered, so that the microswitch is converted from a normally open state to a normally closed state, or the microswitch is converted from a normally closed state to a normally open state. The microswitch transmits the deformation variable signal to the controller. After the controller identifies the deformation variable signal, it controls to cut off the current of the circuit where the capacitor 100 is located, thereby isolating the capacitor 100 from the power grid and eliminating the dangerous state.

[0119] It's important to note that a microswitch has three contacts: a common contact, a normally open contact, and a closed contact. The normally open contact opens the microswitch, allowing current to flow. The closed contact interrupts the flow of current in the circuit where the microswitch is located. Microswitches can operate in either the normally open or normally closed state, depending on their design and application.

[0120] In actual use, a transmission element, such as a roller or button, can be provided on the end of the actuating reed 31 that contacts the end cap 1111. The end cap 1111 can act on the actuating reed 31 via the transmission element. When the end of the actuating reed 31 that contacts the end cap 1111 moves upward to a critical point, a transient actuation occurs, rapidly connecting or disconnecting the movable contact at the end of the actuating reed 31 with the fixed contact.

[0121] In another example, the monitor 30 may be a distance sensor, which is used to monitor the distance between the end cap 1111 and the distance sensor.

[0122] In this case, when the capacitor body 10 is operating normally and the shell 11 is not deformed, the distance between the end cap 1111 and the distance sensor monitored by the distance sensor is the largest. When the air pressure in the capacitor body 10 increases, the deformation of the end cap 1111 increases. When the deformation of the end cap 1111 increases, the distance between the end cap 1111 and the distance sensor monitored by the distance sensor decreases. When the distance between the end cap 1111 and the distance sensor monitored by the distance sensor reaches a critical value, the controller determines that the capacitor body 10 is in an abnormal operating state based on the received signal, and controls the current of the circuit where the capacitor 100 is located to be cut off, thereby isolating the capacitor 100 from the power grid and eliminating the dangerous state.

Claims

1. A capacitor, characterized in that: include: A capacitor body having a housing; A carrier frame is arranged outside the shell; A monitor, disposed on the carrier; The monitor is used to monitor the deformation of the shell and generate a deformation signal according to the deformation; A controller is electrically connected to the monitor; the controller is used to receive the deformation variable signal and control the on / off of the circuit where the capacitor is located according to the deformation variable signal.

2. The capacitor according to claim 1, wherein The shell includes a top plate and a bottom plate that are arranged opposite to each other, and a surrounding plate located between the top plate and the bottom plate; The supporting frame is arranged on a side of the top plate away from the bottom plate, and the monitor is used to monitor the deformation amount of the top plate.

3. The capacitor according to claim 2, wherein: The monitor is arranged at the geometric center of the supporting frame.

4. The capacitor according to claim 2, wherein The supporting frame is clamped with the top plate.

5. The capacitor according to claim 4, wherein A receiving space is formed between the top plate, the bottom plate and the enclosure plate; The enclosure has a first end and a second end that are oppositely disposed, and the top plate is disposed at the first end; edges around the first end are provided with a first bending portion that is away from the accommodation space and bent toward the bottom plate; The top plate includes an end cover, a second bent portion, a third bent portion, and a fourth bent portion connected in sequence; the four edges of the end cover are in contact with the inner wall of the enclosure; the second bent portion extends from the end cover in a direction away from the accommodating space; one side of the third bent portion is connected to a side of the second bent portion away from the end cover, and the other side of the third bent portion extends away from the accommodating space and toward the bottom plate; one side of the fourth bent portion is connected to the other side of the third bent portion, and the other side of the fourth bent portion extends toward the accommodating space and away from the bottom plate; The first bending portion is located between the third bending portion and the fourth bending portion.

6. The capacitor according to claim 5, characterized in that The carrier rack is straddled on the top plate; a flange is provided at a position where the carrier rack is connected to the top plate, and the flange is in close contact with the third bending portion.

7. The capacitor according to claim 5, characterized in that The monitor is a micro switch, and the action reed of the micro switch is used to contact the end cover.

8. The capacitor according to claim 5, wherein The monitor is a distance sensor, which is used to monitor the distance between the end cover and the distance sensor.

9. The capacitor according to claim 1, wherein The supporting frame is bonded to the shell.

10. A compensation device, characterized in that: include: The capacitor according to any one of claims 1 to 9; The cover is arranged on the top surface of the capacitor.

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