A photovoltaic circuit breaker device

Abstract

The application relates to a photovoltaic circuit breaker device, which comprises a plurality of circuit breakers, each of which comprises a circuit breaker shell, a deflection amplification structure and an electromagnetic adsorption structure. The circuit breaker shell is provided with a first conductor structure and a second conductor structure at two ends respectively. The deflection amplification structure comprises a swing arm which is rotatably assembled on the inner wall of one side of the circuit breaker shell through a rotating support. The end of the swing arm close to the first conductor structure is provided with a moving contact. The rotating support is located between the two ends of the swing arm and close to the other end of the swing arm. The second conductor structure comprises a bimetallic strip which is configured to drive the other end of the swing arm to deflect through a transmission mechanism to control the moving contact to move away from the first conductor structure. The one end of the swing arm is provided with a moving magnet on the side away from the moving contact. The electromagnetic adsorption structure is arranged in the circuit breaker shell and located on the side of the moving magnet. Through the swing arm, a lever structure is formed, the deformation distance of the bimetallic strip is amplified, and the response action is more sensitive and rapid when the circuit is overloaded.

Description

Technical Field

[0001] This application relates to the field of circuit breaker technology, and in particular to a photovoltaic circuit breaker device. Background Technology

[0002] In the existing power supply mode, it is generally a top-down single power grid power supply mode. At the user end, distribution boxes are generally used to transmit the power from the power grid to the user to complete the power supply to the user. In order to ensure power safety, circuit breakers are generally installed in the distribution boxes.

[0003] Existing technology involves a circuit breaker including a pull rod, a trip piece, and a bimetallic strip. The trip piece has transversely distributed strip-shaped limiting holes, which are connected to one end of the pull rod. The pull rod and the bimetallic strip are connected by a trip connecting piece, which can limit the longitudinal displacement and lateral movement range of the pull rod.

[0004] In the circuit breaker described above, when the circuit is overloaded, the bimetallic strip heats up and deforms. This requires the overload current to continue flowing until the deformation of the bimetallic strip is sufficient to trip the circuit breaker. The required deformation is large, so the overload current exists for too long. The overload current will still damage other electrical components connected in the circuit. Summary of the Invention

[0005] This application provides a photovoltaic circuit breaker device that can solve the problem that existing circuit breakers have long response times and cannot cut off overload current in time.

[0006] The technical solution of this application is as follows: A photovoltaic circuit breaker device includes multiple circuit breakers. Each circuit breaker includes a circuit breaker housing, a deflection amplification structure, and an electromagnetic adsorption structure. A first conductor structure and a second conductor structure are respectively provided at both ends of the circuit breaker housing. The deflection amplification structure includes a swing arm, which is rotatably mounted on the inner wall of one side of the circuit breaker housing via a rotating bracket. A moving contact is provided at one end of the swing arm near the first conductor structure. The rotating bracket is located between the two ends of the swing arm and near the other end of the swing arm. The second conductor structure includes a bimetallic strip, which is configured to drive the other end of the swing arm to deflect via a transmission mechanism to control the moving contact away from the first conductor structure. A moving magnet is provided on one side of the swing arm away from the moving contact. The electromagnetic adsorption structure is located inside the circuit breaker housing and on one side of the moving magnet, for adsorbing the moving magnet to interrupt the short-circuit current.

[0007] By adopting the above scheme and setting a swing arm, when an overload current passes through and the bimetallic strip deforms, the bimetallic strip can bend and deform, thereby driving the other end of the swing arm to deflect. Since the rotating bracket is set on one side of the swing arm and close to the other end of the swing arm, a lever structure is formed. Therefore, after the end of the swing arm close to the bimetallic strip swings at a small angle, the end with the moving contact can swing at a relatively large angle. Thus, when an overload current passes through and the bimetallic strip inside the device deforms, it only needs to undergo a small angle of bending deformation to drive the moving contact to disconnect, thereby shortening the response time for cutting off the overload current. At the same time, a moving magnet is set on the swing arm. The electromagnetic adsorption structure not only enables the device to quickly cut off the short-circuit current and avoid damage from the short-circuit current, but also, when an overload current occurs, the magnetic attraction between the electromagnetic adsorption structure and the moving magnet can assist the swing arm to deflect more quickly, further improving the speed of cutting off the overload current.

[0008] In one embodiment of this application, the first conductor structure includes a first contact terminal, one end of which extends into the interior of the circuit breaker housing, a stationary contact is provided on one side of the first contact terminal near the swing arm, and the other end extends into the exterior of the circuit breaker housing.

[0009] By adopting the above scheme, by setting a stationary contact on the first contact terminal, the stationary contact can be connected to the circuit, so that when the moving contact is separated from the stationary contact, it can cut off the current of the main circuit.

[0010] In one embodiment of this application, the second conductor structure includes: The second contact terminal has one end extending into the inside of the circuit breaker housing and the other end extending into the outside of the circuit breaker housing; One end of the bimetallic strip is mounted on one end of the second contact terminal and is electrically connected to the moving contact.

[0011] By adopting the above scheme, the bimetallic strip is electrically connected to the moving contact, so that the bimetallic strip is connected in series in the circuit. When the moving contact is in contact with the stationary contact, the current in the circuit can flow through the bimetallic strip, thereby enabling the bimetallic strip to sense the change in current in the circuit and deform accordingly.

[0012] In one embodiment of this application, the rotating bracket includes: The bracket body is assembled on the inner wall of the circuit breaker housing, and a rotating roller is rotatably mounted on the bracket body; A connecting column is coaxially mounted on one side of the rotating roller and passes through the support body. A first torsion spring is provided between the connecting column and the support body.

[0013] By adopting the above scheme, the first torsion spring is set inside the rotating bracket, so that when the swing arm deflects and the moving contact moves away from the stationary contact, the first torsion spring will not drive the swing arm to return to the center due to the resistance of the bimetallic strip. At the same time, it is ensured that when the stationary contact and the moving contact are in contact, the torsion of the first torsion spring allows the moving contact to make stable contact with the stationary contact without external interference.

[0014] In one embodiment of this application, the transmission mechanism includes: A rotating disk is rotatably mounted on the inner wall of the circuit breaker housing via a rotating shaft. A second torsion spring is coaxially sleeved on the outside of the rotating shaft, and the two ends of the second torsion spring are respectively connected and fixed to the rotating disk and the circuit breaker housing. An abutment post is vertically mounted on the surface of the rotating disk and located on one side of the rotating shaft, and the abutment post is in contact with the other end of the swing arm; The L-shaped groove is fitted onto the surface of the rotating disk and located on the other side of the rotating shaft. The other end of the bimetallic strip extends into the interior of the L-shaped groove, and the L-shaped groove is electrically connected to the moving contact.

[0015] By adopting the above scheme, when the bimetallic strip deforms, the other end of the bimetallic strip can bend and abut against the L-shaped groove. The L-shaped groove drives the rotating disk to deflect, and the deflection of the rotating disk can drive the abutting post to hold the other end of the swing arm, thereby driving the swing arm to deflect, so that the moving contact moves away from the stationary contact, cuts off the overload circuit, and achieves the purpose of protecting the electrical components in the circuit.

[0016] In one embodiment of this application, the electromagnetic adsorption mechanism includes: A fixed bracket is fixedly mounted on the inner wall of the circuit breaker housing; An electromagnet assembly is mounted on a fixed bracket, and a magnetic extension is mounted on the fixed bracket. The magnetic extension is fixedly mounted on the inner wall of the circuit breaker housing, with one end in contact with the iron core of the electromagnet assembly and the other end extending to one side of the moving magnet. The moving magnet has an inclined surface on the side near the magnetic extension.

[0017] By adopting the above scheme, when the circuit is normal, the branch current of the electromagnetic adsorption structure is small due to the large resistance of the electromagnetic adsorption structure, and the magnetic force generated is small. The magnetic force adsorbing the moving magnet is not enough to resist the elastic force of the first torsion spring. At this time, the stationary contact and the moving contact can make stable contact to ensure the continuity of the circuit. When the circuit is overloaded, due to the presence of a magnetic extension, the swing arm deflects as it bends and deforms under the influence of the bimetallic strip, thus cutting off the circuit. At this time, the electromagnetic adsorption structure will not generate electromagnetic force due to the disconnection of the circuit. However, since the magnetic extension is located on one side of the moving magnet, there is an attraction between the moving magnet and the magnetic extension when the moving magnet approaches the magnetic extension. Therefore, it can assist the swing arm to deflect faster, thereby increasing the speed at which the device cuts off the overload current. When a short circuit occurs, the short-circuit current is very large, increasing the current flowing through the branch of the electromagnetic adsorption structure. At this time, the magnetic force generated by the electromagnet assembly increases, allowing it to directly attract the magnet of the swing arm. This causes the swing arm to deflect, thus cutting off the short-circuit current. Even after the swing arm deflects and the short-circuit current is cut off, the attraction between the moving magnet and the magnetic extension component prevents the swing arm from returning to its original position because the moving magnet on the swing arm is close to the magnetic extension component.

[0018] In one embodiment of this application, the photovoltaic circuit breaker device further includes: A converter assembly, comprising a protocol converter and an interface converter, both of which are mounted on one side of the circuit breaker and electrically connected to the circuit breaker; The communication module is mounted on the converter assembly and is equipped with a sensing and detection component on the circuit breaker. It is used to send the parameters detected by the sensing and detection component to the terminal.

[0019] By adopting the above scheme, and by setting up a communication module and a converter component inside the device, the device can communicate with external terminals, enabling the device to control the circuit breaker through the external terminal. This increases the ways to control the circuit breaker's operation and improves the ease of use of the device.

[0020] In one embodiment of this application, the circuit breaker further includes a heat sink, which includes a transmission component and a sealing component. The rotating disk has annular teeth arranged around its circumference. The side wall of the circuit breaker housing has a plurality of columnar through holes. The sealing component is used to block the columnar through holes. The annular teeth are configured to drive the sealing component to move through the transmission component, so that the sealing component moves away from the columnar through holes.

[0021] By adopting the above scheme, when the circuit is overloaded, the bimetallic strip bends and drives the rotating disk to deflect. At the same time, the rotating disk can drive the sealing component to move through the cooperation of the ring tooth and the transmission component, so that the sealing component no longer blocks the columnar through hole, allowing the entire circuit breaker housing to be connected to the outside, increasing the heat dissipation capacity of the device, and avoiding the heat generated when the circuit is overloaded, which would cause heat to accumulate inside the device and accelerate the aging of other components.

[0022] In one embodiment of this application, the transmission component includes: Driven gear, which is rotatably mounted inside the circuit breaker housing and meshes with the ring gear; A rack is slidably fitted inside the circuit breaker housing and meshes with the driven gear. One end of the rack passes through the fixed bracket and is connected and fixed to the sealing member.

[0023] By adopting the above scheme, when the bimetallic strip deflects the rotating disk, the rotating disk can also drive the driven gear to rotate through the meshing between the driven gear and the ring gear. The driven gear drives the rack to move, which in turn causes the rack to drive the sealing component to move, so that the sealing component no longer blocks the columnar through hole, thereby improving the heat dissipation capacity of the device.

[0024] In one embodiment of this application, the sealing element includes: A blocking rod is provided, wherein a strip-shaped groove matching the shape of the blocking rod is provided on the side wall of the circuit breaker housing, and the columnar through hole is provided on the side of the strip-shaped groove and communicates with the circuit breaker housing; The sealing columns are spaced apart along the length of the sealing rod on one side of the sealing rod and correspond one-to-one with the columnar through holes.

[0025] By adopting the above scheme, and by using a sealing rod and a sealing column, when the rack moves, the rack can drive the sealing rod away from the columnar through hole, and then drive the sealing column away from the columnar through hole, so that when an overload current is generated, the residual heat inside the device will not accumulate.

[0026] In summary, this application includes at least one of the following beneficial technical effects: by setting a bimetallic strip and a swing arm, and using the swing arm to form a lever structure, even when the bimetallic strip undergoes a small deformation, it can drive the moving contact located at one end of the swing arm to move over a wide range, making it easier for the moving contact to disengage from the stationary contact to cut off the circuit, avoiding the overload current in the circuit from existing for too long, improving the response speed of the overload current cutting action, and indirectly improving the sensitivity of the device to cutting off the overload current.

[0027] By setting up an electromagnetic adsorption mechanism, when a short circuit occurs in the circuit of the electromagnetic adsorption mechanism, the current flowing through the electromagnetic adsorption mechanism increases, and the magnetic force generated by the electromagnetic adsorption mechanism increases, thereby attracting the magnet on the swing arm. This causes the swing arm to overcome the torque of the first torsion spring and swing, thus cutting off the circuit and preventing the short circuit current from burning out other loads in the circuit. At the same time, the electromagnetic adsorption mechanism can also generate an overload current in the circuit. When the swing arm moves due to the deformation of the bimetallic strip, until the circuit is cut off, the magnetic extension on the electromagnetic adsorption mechanism can attract the magnet, providing the swing arm with resistance to overcome the torque of the first torsion spring, thus assisting the bimetallic strip and preventing the swing arm from returning to its original position.

[0028] By setting a driven gear, when the circuit is overloaded, the driven gear deflects itself due to the meshing action between it and the ring tooth when the rotating disk deflects. This causes the rack to drive the sealing rod and sealing post away from the columnar through hole. The sealing post no longer blocks the columnar through hole, thus allowing the circuit breaker housing to be directly connected to the outside. This facilitates the accumulation of residual heat inside the circuit breaker housing and improves the protection capability for other electronic components. Attached Figure Description

[0029] Figure 1 This is a front view of a photovoltaic circuit breaker device provided in the first embodiment of this application; Figure 2 This is a front sectional view of a photovoltaic circuit breaker device when the circuit is normal, provided in the first embodiment of this application; Figure 3 yes Figure 2 An enlarged schematic diagram of part A in the middle; Figure 4 This is a front sectional view of a photovoltaic circuit breaker device under circuit overload conditions, provided in the first embodiment of this application. Figure 5 This is a front view of a photovoltaic circuit breaker device swing arm provided in the first embodiment of this application; Figure 6 This is a bottom sectional view of the rotating disk of a photovoltaic circuit breaker device provided in the first embodiment of this application; Figure 7 This is a rear view of a photovoltaic circuit breaker device provided in the first embodiment of this application; Figure 8 This is a front sectional view of a photovoltaic circuit breaker device provided in the second embodiment of this application; Figure 9 This is a front view of the driven gear of a photovoltaic circuit breaker device provided in the second embodiment of this application; Figure 10 This is a front view of a photovoltaic circuit breaker device sealing column provided in the second embodiment of this application.

[0030] Explanation of reference numerals in the attached drawings: 1. Circuit breaker; 11. Circuit breaker housing; 111. Columnar through hole; 112. Strip groove; 12. Deflection amplification structure; 121. Swing arm; 1211. Moving contact; 1212. Moving magnet; 1213. Inclined surface; 122. Rotating bracket; 1221. Bracket body; 1222. Rotating roller; 1223. Connecting column; 1224. First torsion spring; 13. Electromagnetic adsorption structure; 131. Fixed bracket; 132. Electromagnet assembly; 133. Magnetic extension; 14. First conductor structure; 141. First contact terminal; 1411. Stationary contact; 15. Second conductor structure; 151. Bimetallic strip; 152. Second contact terminal; 16. Transmission mechanism; 161. Rotating disk; 1611. Ring tooth; 162. Rotating shaft; 163. Second torsion spring; 164. Abutment post; 165. L-shaped groove; 17. Heat sink; 171. Transmission component; 1711. Driven gear; 1712. Rack; 172. Sealing component; 1721. Sealing rod; 1722. Sealing post; 2. Converter assembly; 3. Communication module. Detailed Implementation

[0031] The following is in conjunction with the appendix Figures 1-10 The photovoltaic circuit breaker device provided in this application includes multiple circuit breakers 1.

[0032] Example 1, please refer to Figure 1 and Figure 2The circuit breaker 1 includes a circuit breaker housing 11, a deflection amplification structure 12, and an electromagnetic adsorption structure 13. A first conductor structure 14 and a second conductor structure 15 are respectively disposed at both ends of the circuit breaker housing 11. The deflection amplification structure 12 includes a swing arm 121, which is rotatably mounted on one inner wall of the circuit breaker housing 11 via a rotating bracket 122. A moving contact 1211 is disposed at one end of the swing arm 121 near the first conductor structure 14. The rotating bracket 122 is located between the two ends of the swing arm 121 and near the other end of the swing arm 121. The second conductor structure 15 includes a bimetallic strip 151, which is configured to drive the other end of the swing arm 121 via a transmission mechanism 16. One end is deflected to control the moving contact 1211 away from the first conductor structure 14. A moving magnet 1212 is provided on the side of the swing arm 121 away from the moving contact 1211. The electromagnetic adsorption structure 13 is disposed inside the circuit breaker housing 11 and located on one side of the moving magnet 1212. It is used to adsorb the moving magnet 1212 to cut off the short-circuit current. By setting the swing arm 121, a lever structure is formed, which amplifies the deformation distance of the bimetallic strip 151, making the response action more sensitive and faster when the circuit is overloaded. At the same time, the moving magnet 1212 is provided on the swing arm 121, so that the electromagnetic adsorption structure 13 can not only enable the device to quickly cut off the short-circuit current, but also assist in cutting off the overload current and prevent the swing arm 121 from returning to the center.

[0033] In this embodiment, the electromagnetic adsorption structure 13 is electrically connected to the first conductor structure 14 and the second conductor structure 15, so that the electromagnetic adsorption structure 13 cuts off its own power supply circuit when the circuit is cut off. The specific connection method is a conventional setting for those skilled in the art, so it will not be described in detail here.

[0034] Please see Figure 1 The first conductor structure 14 includes a first contact terminal 141. One end of the first contact terminal 141 extends into the interior of the circuit breaker housing 11. A stationary contact 1411 is provided on one side of the first contact terminal 141 near the swing arm 121, and the other end extends into the exterior of the circuit breaker housing 11. By providing the stationary contact 1411, the moving contact 1211 can cut off the current of the main circuit when it is separated from the stationary contact 1411.

[0035] In this embodiment, the stationary contact 1411 and the moving contact 1211 can be elastic conductive metal components. The stationary contact 1411 has a recess (not shown), and the moving contact 1211 has a protrusion (not shown) that can be engaged in the recess. This allows the stationary contact 1411 and the moving contact 1211 to engage elastically when in contact, improving the stability of the device circuit connection.

[0036] Please refer to Figure 1. The second conductor structure 15 includes a second contact terminal 152. One end of the second contact terminal 152 extends into the interior of the circuit breaker housing 11, and the other end extends into the exterior of the circuit breaker housing 11. One end of the bimetallic strip 151 is mounted on one end of the second contact terminal 152 and is electrically connected to the moving contact 1211. By electrically connecting the bimetallic strip 151 to the moving contact 1211, the bimetallic strip 151 is connected in series in the circuit, allowing current to flow through the bimetallic strip 151. This facilitates the deformation of the bimetallic strip 151 according to changes in the current magnitude, thereby controlling the opening and closing of the circuit.

[0037] Please see Figure 3 The rotating bracket 122 includes a bracket body 1221 and a connecting column 1223. The bracket body 1221 is mounted on the inner wall of the circuit breaker housing 11. A rotating roller 1222 is rotatably mounted on the bracket body 1221. The connecting column 1223 is coaxially mounted on one side of the rotating roller 1222 and passes through the bracket body 1221. A first torsion spring 1224 is provided between the connecting column 1223 and the bracket body 1221. By providing the first torsion spring 1224, after the bimetallic strip 151 recovers its cooling and deformation, the first torsion spring 1224 can drive the swing arm 121 to automatically return to the center. At the same time, due to the torsion of the first torsion spring 1224, the moving contact 1211 can stably contact the stationary contact 1411 without external interference.

[0038] Please see Figure 6 The transmission mechanism 16 includes a rotating disk 161, a contact post 164, and an L-shaped groove 165. The rotating disk 161 is rotatably mounted on the inner wall of the circuit breaker housing 11 via a rotating shaft 162. A second torsion spring 163 is coaxially sleeved on the outside of the rotating shaft 162. The two ends of the second torsion spring 163 are respectively connected and fixed to the rotating disk 161 and the circuit breaker housing 11. The contact post 164 is vertically mounted on the surface of the rotating disk 161 and located on one side of the rotating shaft 162. The contact post 164 contacts the other end of the swing arm 121. The L-shaped groove 165 is mounted on the surface of the rotating disk 161 and located on the other side of the rotating shaft 162. The other end of the bimetallic strip 151 extends into the interior of the L-shaped groove 165. The L-shaped groove 165 is electrically connected to the moving contact 1211. When the bimetallic strip 151 deforms, the bimetallic strip 151... It can abut against the L-shaped groove 165, thereby driving the rotating disk 161 to rotate, which in turn drives the swing arm 121 to deflect, so as to cut off the overload circuit.

[0039] Please see Figure 4 and Figure 5The electromagnetic adsorption mechanism includes a fixed bracket 131 and an electromagnet assembly 132. The fixed bracket 131 is fixedly mounted on the inner wall of the circuit breaker housing 11. The electromagnet assembly 132 is mounted on the fixed bracket 131. A magnetic extension 133 is mounted on the fixed bracket 131. The magnetic extension 133 is fixedly mounted on the inner wall of the circuit breaker housing 11. One end of the magnetic extension 133 is in contact with the iron core of the electromagnet assembly 132, and the other end extends to one side of the movable magnet 1212. The movable magnet 1212 has an inclined surface 1213 on the side near the magnetic extension 133. Through the magnetic extension 133 connected to the electromagnet assembly 132, the device can attract the movable magnet 1212 regardless of whether the circuit is overloaded or short-circuited and needs to be cut off, thus preventing the swing arm 121 from automatically returning to the center.

[0040] In this embodiment, the magnetic extension 133 may be a magnetic metal component.

[0041] Please see Figure 7 The photovoltaic circuit breaker device further includes a converter assembly 2 and a communication module 3. The converter assembly 2 includes a protocol converter and an interface converter. Both the protocol converter and the interface converter are mounted on one side of the circuit breaker 1 and are electrically connected to the circuit breaker 1. The circuit breaker 1 is equipped with a sensing and detection component. The communication module 3 is mounted on the converter assembly 2 and is used to send the parameters detected by the sensing and detection component to the terminal.

[0042] In this embodiment, an inverter is installed inside the device. The converter component 2 communicates directly with the inverter via RS485 to realize data acquisition and flexible control of the inverter. At the same time, the built-in protocol library supports 90% of inverters. Among them, the communication module 3 can be the HPLC communication module 3, which can communicate with the concentrator and other area management equipment in real time to realize the real-time Internet of Things of key nodes in the power grid; The sensing and detection components may include current transformers, which are used to detect electrical parameters such as voltage, current, and power in the circuit. The measurement error is better than 0.5%, and the power metering accuracy is 0.5S class for active power and 2 class for reactive power. The sensing and detection component may also include a metering chip, which provides steady-state and transient data analysis using the raw waveform data recorded by the metering chip, and realizes series fault arc detection by analyzing the raw waveform data recorded by the metering chip. The sensing and detection components may also include voltage sensors, which measure the voltage of each phase of the three-phase power supply. These sensors transmit the collected voltage signals to the control circuit of circuit breaker 1. The connection method of the voltage sensors is a conventional technique for those skilled in the art, and therefore will not be described in detail here. The photovoltaic circuit breaker device may also include an undervoltage release (not shown in the figure). When the voltage is normal, the electromagnetic force can keep the undervoltage release in the engaged state, so that the circuit breaker 1 can work normally. When the voltage drops below the undervoltage value, the undervoltage release will cause the contacts of the circuit breaker 1 to open, preventing the equipment from failing to operate normally or being damaged due to low voltage. The connection method of the undervoltage release is a conventional technical means for those skilled in the art, so it will not be described in detail here. In the relevant technologies, in the existing power grid with photovoltaic terminals, photovoltaic power generation cannot be consumed locally, which will result in reverse power supply and excessively high terminal voltage. When this embodiment is applied in the above scenario, through active power control, the device can receive active power commands from the distribution network master station, with an adjustment accuracy of ≤±2% of the rated power and a response time of ≤10s. When the active power at the distributed power source outlet is reversed (i.e., the reverse power >5% of the rated capacity), the power supply is automatically limited. Through reactive power voltage control, the reactive power output is adjusted in real time according to the voltage at the access point, with a compensation range of -100% to +100% of the rated capacity and a voltage control accuracy of ±2% of the rated voltage. In particular, it provides short-term reactive power impact during grid faults, thereby improving the transient stability of the system.

[0043] Example 2 is basically the same in structure as Example 1, except that: Please see Figure 8 The circuit breaker 1 further includes a heat sink 17, which includes a transmission component 171 and a sealing component 172. The rotating disk 161 has annular teeth 1611 arranged around its circumference. The side wall of the circuit breaker housing 11 has multiple columnar through holes 111. The sealing component 172 is used to block the columnar through holes 111. The annular teeth 1611 are configured to drive the sealing component 172 to move through the transmission component 171, so that the sealing component 172 moves away from the columnar through holes 111. When the circuit is overloaded, the rotation of the rotating disk 161 not only drives the swing arm 121 to rotate, but also drives the sealing component 172 to move, so that the sealing component 172 no longer blocks the columnar through holes 111, thereby increasing the heat dissipation capacity of the device.

[0044] Please see Figure 9The transmission component 171 includes a driven gear 1711 and a rack 1712. The driven gear 1711 is rotatably mounted inside the circuit breaker housing 11 and meshes with the annular gear 1611. The rack 1712 is slidably mounted inside the circuit breaker housing 11 and meshes with the driven gear 1711. One end of the rack 1712 passes through the fixed bracket 131 and is connected and fixed to the sealing component 172. When the bimetallic strip 151 deflects the rotating disk 161, the meshing between the driven gear 1711 and the rack 1712 causes the rack 1712 to drive the sealing component 172 to no longer block the columnar through hole 111, thereby improving the heat dissipation capacity of the device.

[0045] Please see Figure 10 The sealing component 172 includes a sealing rod 1721 and a sealing post 1722. A strip-shaped groove 112 matching the shape of the sealing rod 1721 is provided on the side wall of the circuit breaker housing 11. The columnar through hole 111 is provided on the side of the strip-shaped groove 112 and communicates with the circuit breaker housing 11. The sealing post 1722 is spaced along the length of the sealing rod 1721 on one side of the sealing rod 1721 and corresponds one-to-one with the columnar through hole 111. By using the sealing post 1722 to block the columnar through hole 111, the sealing post 1722 can disengage from the columnar through hole 111 when the sealing rod 1721 moves, thereby quickly opening the circuit breaker housing 11 and communicating with the outside, accelerating heat dissipation.

[0046] In summary, when the circuit is overloaded, the overload current flowing through the bimetallic strip 151 causes the bimetallic strip 151 to deform and bend. When one end of the bimetallic strip 151 bends, it moves the L-shaped groove 165, which in turn drives the rotating disk 161 to deflect. When the rotating disk 161 deflects, it can drive the sealing column 1722 to deflect and enter the end of the swing arm 121 away from the moving contact 1211. Since the swing arm 121 and the rotating bracket 122 form a lever structure, the moving contact 1211 moves a large distance with the swing arm 121, thus breaking away from the contact with the stationary contact 1411, and the circuit is disconnected. At this time, the moving magnet 1212 on one side of the swing arm 121 approaches the magnetic extension 133 when the circuit is disconnected, and then relies on the swing arm 121 to be magnetically attracted to the magnetic extension 133. At this time, the circuit is disconnected and will not automatically return to the center. By using the small angle change of the bimetallic strip 151, the device can automatically cut off the overload current. When a short circuit occurs, the current in the circuit increases. At this time, the bimetallic strip 151 does not have time to deform in response to the instantaneous short circuit current. Due to the increase in circuit current, the electromagnet assembly 132 has an increased magnetic force, which directly attracts the moving magnet 1212 to contact the magnetic extension 133, thereby causing the swing arm 121 to deflect and the circuit to break.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A photovoltaic circuit breaker device, characterized in that: The circuit includes multiple circuit breakers (1), each circuit breaker (1) comprising a circuit breaker housing (11), a deflection amplification structure (12), and an electromagnetic adsorption structure (13). A first conductor structure (14) and a second conductor structure (15) are respectively provided at both ends of the circuit breaker housing (11). The deflection amplification structure (12) includes a swing arm (121), which is rotatably mounted on one inner wall of the circuit breaker housing (11) via a rotating bracket (122). A moving contact (1211) is provided at one end of the swing arm (121) near the first conductor structure (14), and the rotating bracket (122) is located between the two ends of the swing arm (121). And near the other end of the swing arm (121), the second conductor structure (15) includes a bimetallic strip (151), which is configured to drive the other end of the swing arm (121) to deflect via a transmission mechanism (16) to control the moving contact (1211) away from the first conductor structure (14). A moving magnet (1212) is provided on one side of the swing arm (121) away from the moving contact (1211). The electromagnetic adsorption structure (13) is disposed inside the circuit breaker housing (11) and located on one side of the moving magnet (1212) for adsorbing the moving magnet (1212) to cut off the short-circuit current.

2. The photovoltaic circuit breaker device according to claim 1, characterized in that: The first conductor structure (14) includes a first contact terminal (141), one end of which extends into the interior of the circuit breaker housing (11). One end of the first contact terminal (141) is provided with a stationary contact (1411) near the side of the swing arm (121), and the other end extends into the exterior of the circuit breaker housing (11).

3. The photovoltaic circuit breaker device according to claim 1, characterized in that, The second conductor structure (15) includes: The second contact terminal (152) has one end extending into the inside of the circuit breaker housing (11) and the other end extending into the outside of the circuit breaker housing (11); One end of the bimetallic strip (151) is mounted on one end of the second contact terminal (152) and is electrically connected to the moving contact (1211).

4. A photovoltaic circuit breaker device according to claim 1, characterized in that, The rotating bracket (122) includes: A support body (1221) is mounted on the inner wall of the circuit breaker housing (11), and a rotating roller (1222) is rotatably mounted on the support body (1221); A connecting column (1223) is coaxially mounted on one side of the rotating roller (1222) and passes through the support body (1221). A first torsion spring (1224) is provided between the connecting column (1223) and the support body (1221).

5. A photovoltaic circuit breaker device according to claim 3, characterized in that, The transmission mechanism (16) includes: A rotating disk (161) is rotatably mounted on the inner wall of the circuit breaker housing (11) via a rotating shaft (162). A second torsion spring (163) is coaxially sleeved on the outside of the rotating shaft (162). The two ends of the second torsion spring (163) are respectively connected and fixed to the rotating disk (161) and the circuit breaker housing (11). A contact post (164) is vertically mounted on the surface of the rotating disk (161) and located on one side of the rotating shaft (162). The contact post (164) is in contact with the other end of the swing arm (121). L-shaped groove (165) is fitted onto the surface of the rotating disk (161) and located on the other side of the rotating shaft (162). The other end of the bimetallic strip (151) extends into the interior of the L-shaped groove (165). The L-shaped groove (165) is electrically connected to the moving contact (1211).

6. A photovoltaic circuit breaker device according to claim 5, characterized in that, The electromagnetic adsorption structure (13) includes: A fixed bracket (131) is fixedly mounted on the inner wall of the circuit breaker housing (11); An electromagnet assembly (132) is mounted on a fixed bracket (131). A magnetic extension (133) is mounted on the fixed bracket (131). The magnetic extension (133) is fixedly mounted on the inner wall of the circuit breaker housing (11). One end of the extension is in contact with the iron core of the electromagnet assembly (132), and the other end extends to one side of the moving magnet (1212). The moving magnet (1212) has an inclined surface (1213) on the side near the magnetic extension (133).

7. A photovoltaic circuit breaker device according to claim 1, characterized in that, The photovoltaic circuit breaker device also includes: The converter assembly (2) includes a protocol converter and an interface converter, both of which are mounted on one side of the circuit breaker (1) and electrically connected to the circuit breaker (1). The communication module (3) is provided on the circuit breaker (1) and is mounted on the converter assembly (2) to send the parameters detected by the sensing assembly to the terminal.

8. A photovoltaic circuit breaker device according to claim 6, characterized in that: The circuit breaker (1) further includes a heat sink (17), which includes a transmission component (171) and a sealing component (172). The rotating disk (161) has an annular tooth (1611) arranged around its circumference. The side wall of the circuit breaker housing (11) has a plurality of columnar through holes (111). The sealing component (172) is used to block the columnar through holes (111). The annular tooth (1611) is configured to drive the sealing component (172) to move through the transmission component (171), so that the sealing component (172) moves away from the columnar through holes (111).

9. A photovoltaic circuit breaker device according to claim 8, characterized in that, The transmission component (171) includes: Driven gear (1711), which is rotatably mounted inside the circuit breaker housing (11) and meshes with the ring gear (1611); A rack (1712) is slidably fitted inside the circuit breaker housing (11) and meshes with the driven gear (1711). One end of the rack (1712) passes through the fixed bracket (131) and is connected and fixed to the sealing member (172).

10. A photovoltaic circuit breaker device according to claim 9, characterized in that: The sealing element (172) includes: The sealing rod (1721) has a strip groove (112) on the side wall of the circuit breaker housing (11) that matches the shape of the sealing rod (1721). The columnar through hole (111) is located on the side of the strip groove (112) and communicates with the circuit breaker housing (11). The sealing posts (1722) are spaced apart along the length of the sealing rod (1721) on one side of the sealing rod (1721) and correspond one-to-one with the columnar through holes (111).

Images