Rapid boundary circuit breaker

Abstract

The invention provides a quick demarcation circuit breaker, and relates to the technical field of demarcation circuit breakers. The circuit breaker comprises a shell, a permanent magnetic mechanism, a ventilation mechanism, an air supply mechanism and a temperature change mechanism. And a ventilation gap is formed between the outer surface of the permanent magnetic mechanism and the inner wall of the shell. The ventilation mechanism is composed of a first blocking assembly and a second blocking assembly which are arranged at the two ends of the ventilation channel. The air supply mechanism is used for supplying air into the ventilation gap. The temperature change mechanism automatically switches states by sensing temperature changes, sequentially drives the blocking assemblies to open the ventilation paths and controls the air supply mechanism to be started at the same time, and heat is rapidly discharged. The structure can actively ventilate and cool in a high-temperature environment and effectively eliminate condensation, and solves the problems that an existing circuit breaker is lagged in heat dissipation response and low in overall performance.

Description

Technical Field

[0001] The present invention relates to the technical field of sectionalizing circuit breakers, and particularly to a fast sectionalizing circuit breaker. Background Art

[0002] Currently, existing fast sectionalizing circuit breakers usually adopt magneto-control materials to achieve fast response and breaking of the outgoing line fault current. While their structural design improves the breaking speed and reliability, a series of technical bottlenecks are also exposed.

[0003] In related technologies, when the magneto-control material encounters a large outgoing line fault current, it is prone to electrical vibration, resulting in an increased risk of re-ignition at the breaking port, thus affecting the thoroughness and stability of breaking. At the same time, the thermal effect brought by the strong fault current will not only cause local temperature rise of the magneto-control mechanism, but also interfere with the timeliness of the magneto-control response. In severe cases, it may cause breaking delay or failure. In addition, since the circuit breaker mostly operates outdoors or in a high-humidity environment, the magneto-control mechanism is extremely vulnerable to moisture erosion, generating condensation when the temperature difference changes greatly, and then causing rust. This rust will directly weaken the magnetic field strength of the magneto-control system and affect its overall performance. Summary of the Invention

[0004] This application discloses a fast sectionalizing circuit breaker to solve the technical problem that the overall performance of the fast sectionalizing circuit breaker in related technologies is reduced due to temperature influence.

[0005] This application provides a fast sectionalizing circuit breaker, adopting the following technical solution: A fast sectionalizing circuit breaker includes a housing with a hollow interior; a permanent magnet mechanism disposed within the housing, with a ventilation gap reserved between the permanent magnet mechanism and the inner wall of the housing, and an anti-rust agent coated on the outer surface of the permanent magnet mechanism; a ventilation mechanism including a ventilation passage, a first blocking component, and a second blocking component. The ventilation passage is opened in the side wall of the housing and is connected to the ventilation gap at one end and to the outside at the other end. The first blocking component is disposed on the housing and located at the opening of one end of the ventilation passage to control the opening and closing of the opening at one end of the ventilation passage. The second blocking component is disposed on the housing and located at the opening of the other end of the ventilation passage to control the opening and closing of the opening at the other end of the ventilation passage; a air supply mechanism disposed on the housing to supply air upward into the ventilation gap; a temperature change mechanism disposed within the housing to automatically control the opening and closing of the first blocking component and the second blocking component in case of temperature change, and synchronously control the opening and closing of the air supply mechanism. The temperature change mechanism has a switchable first state and second state. Wherein, when the temperature value in the ventilation gap is less than or equal to the set threshold, the temperature change mechanism is in the first state to synchronously drive the first blocking component and the second blocking component to be in a state of closing the ventilation passage, and at the same time the air supply mechanism is in a state of stopping operation; When the temperature value in the ventilation gap is greater than the set threshold, the temperature change mechanism automatically switches to the second state. During the switching process, after the first sealing component and the second sealing component sequentially open the end openings of the ventilation channel, the air supply mechanism starts.

[0006] Preferably, the ventilation channel includes a first chamber, an arc-shaped air duct, and a second chamber. Among them, the first chamber is arranged on the inner wall of the housing close to the ventilation gap, and the first sealing component is arranged between the first chamber and the ventilation gap to control the on-off of the first chamber and the ventilation gap; the second chamber is arranged on the outer wall of the housing close to the outside, the arc-shaped air duct is arranged inside the housing and connects the first chamber and the second chamber, and the second sealing component is arranged in the second chamber to control the on-off of the second chamber and the arc-shaped air duct.

[0007] Preferably, the height of the first chamber is higher than that of the second chamber; and / or, the arc-shaped air duct has a first end and a second end, the first end is connected to the first chamber, the second end is connected to the second chamber, and the height of the first end is higher than that of the second end; and / or, the cross-sectional shape of the arc-shaped air duct is configured as a bent wavy shape.

[0008] Preferably, the temperature change mechanism includes a copper plate, a horizontal copper rod, a vertical copper rod, and a temperature-sensitive deformation part; among them, a side groove communicating with the ventilation gap is opened on the lower inner wall of the housing, and the copper plate is fitted and embedded in the side groove; a temperature-sensitive chamber is opened in the inner wall of the housing, the temperature-sensitive chamber is connected to the side groove through a horizontal channel, the horizontal copper rod passes through the horizontal channel and one end is connected to the copper plate and the other end extends into the temperature-sensitive chamber, the vertical copper rod is vertically connected to the other end of the horizontal copper rod, and the temperature-sensitive deformation part is arranged on the vertical copper rod; when the temperature change mechanism is in the first state, the temperature-sensitive deformation part is coaxial with the vertical copper rod; when the temperature change mechanism is in the second state, the temperature-sensitive deformation part is bent relative to the vertical copper rod.

[0009] Preferably, the temperature-sensitive deformation part is configured to be made of nickel-titanium memory alloy, and the austenite transformation temperature value of the nickel-titanium memory alloy is configured to be 23°C. The austenite transformation temperature value of the nickel-titanium memory alloy is configured to be the set threshold. Among them, when the temperature value in the temperature-sensitive chamber and the ventilation gap is less than or equal to the set threshold, the temperature-sensitive deformation part is in the initial form coaxial with the vertical copper rod; when the temperature value in the temperature-sensitive chamber and the ventilation gap is greater than the set threshold, the temperature-sensitive deformation part is bent relative to the vertical copper rod and abuts against the inner side wall of the temperature-sensitive chamber.

[0010] Preferably, the first blocking component includes a stainless steel sheet, a torsion spring and a first pulling rope body, wherein the lower edge of the stainless steel sheet is hinged to the inner wall of the first chamber through the torsion spring, and the upper edge is configured as a free end, and a connecting port is provided on the inner wall of the first chamber, and the surface area of the stainless steel sheet is larger than the opening area of the connecting port. When the torsion spring is in a natural state, the stainless steel sheet is attached to the connecting port and separates the first chamber from the ventilation gap; a first rope threading channel is provided in the inner wall of the shell, and the upper end opening of the first rope threading channel is located on the inner bottom wall of the first chamber. The upper and lower openings are located on the inner top wall of the temperature-sensing chamber, one end of the first pulling rope is connected to the upper edge of the stainless steel sheet, and the other end passes downward through the first rope threading channel and is connected to the top of the temperature-sensing deformation part; in the process of the temperature-changing mechanism switching from the first state to the second state under the influence of ambient temperature, the temperature-sensing deformation part bends relative to the vertical copper rod, pulling the first pulling rope, driving the upper edge of the stainless steel sheet to elastically bend and deform relative to the lower edge toward the first chamber, so as to form a gradually shrinking guide channel in the first chamber from the ventilation gap side through the connecting port to the curved air duct side.

[0011] Preferably, the outer surface of the stainless steel sheet is coated with a thermal insulation coating.

[0012] Preferably, the second blocking assembly includes a sliding bar, a blocking block, a tension spring and a second pulling rope body, wherein the second chamber includes a blocking groove and a sliding channel provided on the shell and connected from top to bottom, the side notch of the blocking groove is connected to the outside, the arc-shaped air duct is connected to the blocking groove and one end opening of the arc-shaped air duct is located on the inner top wall of the blocking groove, the sliding channel is vertically opened in the inner wall of the shell and the top end is connected to the blocking groove, the sliding bar is inserted into the sliding channel; the blocking block is provided at the top end of the sliding bar and is located in the blocking groove, the cross-sectional area of the blocking block is larger than the cross-sectional area of the sliding channel; the tension spring is provided between the bottom end of the sliding bar and the inner bottom wall of the sliding channel, and the tension spring always has a tendency to push the blocking block upward, so as to prevent the blocking block from sliding out of the casing. When the tension spring is in a natural state, the blocking block fits onto the inner top wall of the blocking groove and blocks one end opening of the arc-shaped air duct; a second L-shaped rope threading channel is provided in the inner wall of the shell, one end of the second rope threading channel is connected with the sliding channel, and the other end is connected with the temperature sensing chamber, one end of the second pulling rope body is connected with the lower end wall of the sliding bar, and the other end passes through the inner ring of the tension spring and the second rope threading channel and extends horizontally into the temperature sensing chamber and is connected to the temperature sensing deformation part; in the process of the temperature-changing mechanism switching from the first state to the second state under the influence of ambient temperature, when the temperature-sensitive deformation part bends relative to the vertical copper rod, the second pulling rope body is pulled, driving the sliding bar to overcome the elastic force of the tension spring and move vertically downward, so that one end opening of the arc-shaped air duct is opened and connected to the blocking groove.

[0013] Preferably, the air supply mechanism includes an opening / closing component and a blower component that are electrically connected. The opening / closing component and the blower component are both arranged on the housing. The opening / closing component is used to control the opening and closing of the blower component, and the blower component is used to generate an upward wind force in the ventilation gap. Among them, when the temperature change mechanism is in the first state, the opening / closing component is disconnected, so that the blower component is in the closed state; when the temperature change mechanism is in the second state, the opening / closing component is activated, so that the blower component is in the operating state.

[0014] Preferably, the opening / closing component includes a storage battery and a first conductive sheet, and the blower component includes a blower, a second conductive sheet, and a blower pipe. Among them, the storage battery is arranged on the outer wall of the housing, the first conductive sheet is covered on the side wall of the temperature-sensitive deformation part, and the storage battery is electrically connected to the first conductive sheet through a spring wire; the blower is arranged on the outer wall of the housing and below the storage battery, the second conductive sheet is covered on the inner side wall of the temperature-sensitive cavity, and the blower is electrically connected to the second conductive sheet through a spring wire; one end of the blower pipe is communicated with the air outlet end of the blower, and the other end passes through the inner wall of the housing and extends to the lower end of the ventilation gap and faces vertically upward; when the temperature change mechanism is in the first state, the temperature-sensitive deformation part is coaxial with the vertical copper rod, and at this time the first conductive sheet and the second conductive sheet are separated, so that the storage battery is disconnected from the blower; when the temperature change mechanism is in the second state, the temperature-sensitive deformation part is bent relative to the vertical copper rod, and at this time the first conductive sheet and the second conductive sheet are attached, so that the storage battery is electrically connected to the blower.

[0015] The present invention has the following advantages and beneficial effects: In the present invention, the existing magnetic control mechanism is replaced with a permanent magnet mechanism made of neodymium iron boron, so that the circuit breaker of the present application is not easily affected by other factors except temperature factors, improving the stable magnetic performance of the circuit breaker. At the same time, by setting a ventilation channel structure including a first chamber, an arc-shaped air duct, and a second chamber in the housing, and combining the dynamic opening mechanism of the first plugging component and the second plugging component, a control system capable of automatically switching the air path according to the internal temperature change is constructed. The temperature change mechanism consists of a copper plate with good thermal conductivity, a horizontal copper rod and a vertical copper rod to form a heat conduction path, so that the temperature in the ventilation gap can be efficiently transmitted to the temperature-sensitive deformation part, and the nickel-titanium memory alloy deforms after reaching a specific temperature threshold, driving the two plugging components to act in sequence, realizing the sequential switching of the internal closed channel to the external communication channel, thereby guiding the hot air flow to be discharged orderly, effectively eliminating condensation, improving the internal air circulation efficiency, reducing the loss risk caused by high temperature accumulation, and enhancing the thermal stability and operation reliability of the fast sectioning circuit breaker in a complex environment; The present invention further introduces a air supply mechanism into the ventilation structure and electrically controls it in linkage with the temperature change mechanism. After the temperature-sensitive deformation part reaches the austenite transformation temperature, it deforms itself to make the first conductive sheet arranged on its surface contact and conduct with the second conductive sheet in the temperature-sensitive chamber, thereby realizing a closed circuit between the storage battery and the blower. When the blower is powered on and operates, it continuously blows air to the bottom of the ventilation gap through the air duct. Cooperating with the opening action of the previous plugging component, a forced air flow channel from bottom to top is formed, effectively promoting the rapid discharge of hot air and realizing the functional leap from passive heat dissipation to active air supply. In this structure, the air supply system realizes start-stop switching only relying on the body temperature perception without relying on external sensing and control circuits, and has the advantages of simple structure, timely response and high integration, which is beneficial to improving the intelligent level and use safety of the fast disconnector to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0017] Figure 1 is a schematic structural diagram of the temperature change mechanism in the first state in the embodiment of the present application; Figure 2 is a schematic structural diagram of the temperature change mechanism in the second state in the embodiment of the present application; Figure 3 is a partial schematic diagram of the temperature change mechanism in the first state in the embodiment of the present application; Figure 4 is a partial state diagram of the temperature change mechanism in the first state in the embodiment of the present application; Figure 5 is a partial state diagram of the temperature change mechanism in the second state in the embodiment of the present application; Figure 6 is a partial state diagram showing the ventilation mechanism after the temperature change mechanism is in the first state in the embodiment of the present application; Figure 7 is a partial state diagram showing the ventilation mechanism after the temperature change mechanism is in the second state in the embodiment of the present application.

[0018] The labels in the figure are: 1. Housing; 11. Temperature-sensing chamber; 12. Lateral channel; 13. First rope-passing channel; 14. Second rope-passing channel; 2. Permanent magnet mechanism; 3. Ventilation gap; 4. Ventilation mechanism; 41. Ventilation channel; 411. First chamber; 411a. Communication port; 411b. Guide channel; 412. Arc-shaped air duct; 413. Second chamber; 413a. Sealing groove; 413b. Sliding channel; 42. First sealing assembly; 421. Stainless steel sheet; 422. Torsion spring; 423. First pulling rope body; 43. Second sealing assembly; 431. Sliding bar; 432. Sealing block; 433. Tension spring; 434. Second pulling rope body; 5. Air supply mechanism; 51. Opening and closing assembly; 511. Battery; 512. First conductive sheet; 52. Blowing assembly; 521. Blower; 522. Second conductive sheet; 523. Air duct; 6. Temperature change mechanism; 61. Copper plate; 62. Lateral copper rod; 63. Vertical copper rod; 64. Temperature-sensing deformation part. Detailed implementation manners

[0019] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0020] The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such used data may be interchanged under appropriate circumstances so that the embodiments of this application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and do not limit the number of objects. For example, the first object may be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally means that the related objects before and after are in an "or" relationship.

[0021] Please refer to Figures 1 to 7 , some embodiments of this application provide a fast sectioning circuit breaker. The circuit breaker introduces a temperature regulation mechanism at the permanent magnet mechanism 2 part. When the detected temperature exceeds the set threshold, it can issue an action and take corresponding adjustment measures to avoid the response lag problem caused by the thermal effect. At the same time, an anti-rust agent linked to the temperature regulation mechanism is coated on the surface of the permanent magnet mechanism 2 to achieve long-term and effective protection of the surface of the permanent magnet mechanism 2, improve its adaptability and stability in a high-humidity and high-temperature alternating environment, and thus overall improve the safety and reliability of the fast sectioning circuit breaker in a complex operating environment.

[0022] In some embodiments, combined Figures 1 to 3 , a fast demarcation circuit breaker, comprising a shell 1, a permanent magnet mechanism 2, a ventilation mechanism 4, an air supply mechanism 5 and a temperature change mechanism 6. Exemplarily, the shell 1 is an internal hollow structure for accommodating the permanent magnet mechanism 2 and other components, and a ventilation gap 3 is provided therein, which surrounds the permanent magnet mechanism 2 and the inner wall of the shell 1, and not only reserves a ventilation path for the permanent magnet mechanism 2, but also constructs a locally controllable microclimate environment. At the same time, in order to improve the corrosion resistance, the outer surface of the permanent magnet mechanism 2 is coated with a rust inhibitor. Exemplarily, the rust inhibitor can be a moisture-resistant and heat-resistant epoxy coating or an inorganic rust-proof treatment material, which can slow down the metal corrosion process caused by condensation to a certain extent. Exemplarily, the permanent magnet mechanism 2 is configured as a neodymium iron boron permanent magnet mechanism.

[0023] Furthermore, the ventilation mechanism 4 includes a ventilation channel 41, a first blocking component 42, and a second blocking component 43. The ventilation channel 41 is opened in the side wall of the housing 1 and is connected to the ventilation gap 3 at one end and to the outside at the other end. The first blocking component 42 is provided on the housing 1 and is located at one end of the ventilation channel 41 to control the opening and closing of the one end of the ventilation channel 41. The second blocking component 43 is provided on the housing 1 and is located at the other end of the ventilation channel 41 to control the opening and closing of the other end of the ventilation channel 41. When needed, the ventilation channel is opened to form an air circulation channel, and when not needed, the channel is closed to reduce the risk of external moisture intrusion. Exemplarily, the ventilation mechanism 4 is provided with at least two groups on the housing 1.

[0024] Furthermore, the air supply mechanism 5 is provided on the housing 1 to introduce wind from bottom to top into the ventilation gap 3 , providing an upward airflow to promote the evaporation or dissipation of condensation on the surface of the permanent magnet mechanism 2 .

[0025] Finally, the temperature-changing mechanism 6 is arranged in the shell 1, and is used to automatically control the opening and closing of the first blocking component 42 and the second blocking component 43 when the temperature changes, and to synchronously control the opening and closing of the air supply mechanism 5. The temperature-changing mechanism 6 has a switchable first state and a second state; wherein, when the temperature value in the ventilation gap 3 is less than or equal to the set threshold value, the temperature-changing mechanism 6 is in the first state, so as to synchronously drive the first blocking component 42 and the second blocking component 43 to be in a state of closing the ventilation channel 41, and the air supply mechanism 5 is in a state of stopping operation; when the temperature value in the ventilation gap 3 is greater than the set threshold value, the temperature-changing mechanism 6 automatically switches to the second state, and during the switching process, the first blocking component 42 and the second blocking component 43 open the end openings of the ventilation channel 41 in turn, and the air supply mechanism 5 restarts; this sequence setting helps to prevent the ineffective accumulation of airflow in a closed state and improve the efficiency of airflow utilization.

[0026] On this basis, through this structural design, it is possible to passively adjust the air circulation state inside the circuit breaker in an environment with a large temperature difference between day and night, which is beneficial to reducing the formation of condensation to a certain extent and delaying the corrosion process of the permanent magnet mechanism 2, thereby improving the overall operation stability and service life of the device. It should be noted that the "preset threshold" is not a fixed value, but can be configured and adjusted according to the actual installation environment, and is usually set between 15°C and 25°C to fit the critical temperature range where common condensation occurs. In addition, the "sealing component" is a mechanically movable structure, and its form can include flap type, sliding plug type, rotary valve type, etc. The specific selection can be optimized in combination with the actual space layout and response accuracy. To sum up, through the reasonable configuration of the ventilation channel 41 and the temperature change mechanism 6, this structure realizes the adjustment of the environmental state of the permanent magnet mechanism 2 through structural response without external energy control, and has high practicability and adaptability.

[0027] In some embodiments, in combination with Figures 1 to 3 , the ventilation channel 41 includes three parts: a first chamber 411, an arc-shaped air duct 412, and a second chamber 413. The three parts are sequentially connected to form a complete ventilation path, so that air can enter the ventilation gap 3 from outside the housing 1 when the ventilation mechanism 4 is in the open state.

[0028] Specifically, the first chamber 411 is arranged on the inner side wall of the housing 1, close to the ventilation gap 3, and is adjacent to the ventilation gap 3, serving as a buffer structure for air to enter the ventilation gap 3; the first sealing component 42 is arranged at the position between the first chamber 411 and the ventilation gap 3, and its function is to open the communication path between the first chamber 411 and the ventilation gap 3 when the temperature conditions meet the ventilation requirements, so as to allow the air flow in the ventilation gap 3 to blow out to the outside and realize the replacement of the internal air flow. Between the first chamber 411 and the second chamber 413, they are connected by an arc-shaped air duct 412 arranged in the housing 1. The arc-shaped air duct 412 is preferably a curved or bent structure with a certain length and bending angle. This setting is beneficial to reducing the risk of rain and dust directly entering the ventilation gap 3 when the external wind pressure is large or there is short-term rain invasion, and plays a certain role in protection and diversion.

[0029] The second chamber 413 is provided on the side of the housing 1 close to the outside world and serves as the inlet area for external air to enter the device. A second blocking component 43 is arranged inside it to control the on-off state of the air flow between the arc-shaped air duct 412 and the outside world, so as to open when the ventilation condition is met and cooperate with the first blocking component 42 in a linkage manner to form a complete air flow path. When the temperature change mechanism 6 is in a low-temperature state, both the first blocking component 42 and the second blocking component 43 remain in the closed state. At this time, both ends of the arc-shaped air duct 412 are closed, which is beneficial to isolating moisture or cold air from entering the device. When the temperature change mechanism 6 detects that the temperature in the ventilation gap 3 rises above the set threshold, the second blocking component 43 is preferentially opened to connect the second chamber 413 with the arc-shaped air duct 412. Subsequently, the first blocking component 42 acts to open, enabling external air to smoothly flow into the first chamber 411 and then flow upward through the ventilation gap 3 to the surface of the permanent magnet mechanism 2, playing a role in cooling and dehumidification to a certain extent. This structure realizes the orderly control of the external air introduction path to a certain extent, and improves the overall anti-environmental interference ability of the circuit breaker in combination with the design of the arc-shaped air duct 412. It should be noted that the "chamber" mentioned here does not specifically refer to an airtight cavity, but refers to an internal structural area with a relatively independent space function for connecting ventilation paths, and its specific structural dimensions and shapes can be flexibly adjusted according to the layout and installation space of the housing 1.

[0030] Exemplarily, the height of the first chamber 411 is higher than the height of the second chamber 413.

[0031] Exemplarily, the arc-shaped air duct 412 has a first end and a second end. The first end is connected to the first chamber 411, and the second end is connected to the second chamber 413. The height of the first end is higher than the height of the second end.

[0032] Exemplarily, the cross-sectional shape of the arc-shaped air duct 412 is configured as a bent wavy shape.

[0033] In this way, a large amount of external dust or rainwater can be effectively prevented from entering the ventilation gap 3.

[0034] In some embodiments, in combination with Figures 3 to 5 , to achieve passive induction and automatic response control of the temperature in the ventilation gap 3, the temperature change mechanism 6 includes a copper plate 61, a horizontal copper rod 62, a vertical copper rod 63, and a temperature-sensitive deformation member 64. Among them, a side groove communicating with the ventilation gap 3 is opened on the lower inner wall of the housing 1, and the copper plate 61 is adaptively embedded in the side groove to directly sense the temperature change in the ventilation gap 3.

[0035] Exemplarily, a temperature sensing chamber 11 is formed in the inner wall of the housing 1. The temperature sensing chamber 11 communicates with the side groove through a transverse channel 12. A transverse copper rod 62 is disposed in the transverse channel 12, one end of which is connected to the copper plate 61 and the other end extends into the temperature sensing chamber 11. A vertical copper rod 63 is vertically connected to the other end of the transverse copper rod 62, and a temperature sensing deformation member 64 is disposed on the vertical copper rod 63. Thus, copper, as a high thermal conductivity material, can effectively conduct the temperature sensed by the copper plate 61 to the transverse copper rod 62 connected thereto. The transverse copper rod 62 is disposed in the transverse channel 12 in the housing 1, one end of which is fixedly connected to the copper plate 61, and the other end extends into the temperature sensing chamber 11 and is connected to the vertical copper rod 63, thereby establishing a continuous path for temperature conduction; Exemplarily, when the temperature change mechanism 6 is in the first state, the temperature sensing deformation member 64 is coaxial with the vertical copper rod 63; when the temperature change mechanism 6 is in the second state, the temperature sensing deformation member 64 is bent relative to the vertical copper rod 63.

[0036] Exemplarily, the temperature sensing deformation member 64 is configured to be made of a nickel-titanium memory alloy, and the austenite transformation temperature value of the nickel-titanium memory alloy is configured to be 23°C. The austenite transformation temperature value of the nickel-titanium memory alloy is configured as a set threshold value. Wherein, when the temperature values in the temperature sensing chamber 11 and the ventilation gap 3 are less than or equal to the set threshold value, the temperature sensing deformation member 64 is in an initial form coaxial with the vertical copper rod 63; when the temperature values in the temperature sensing chamber 11 and the ventilation gap 3 are greater than the set threshold value, the temperature sensing deformation member 64 is bent relative to the vertical copper rod 63 and abuts against the inner side wall of the temperature sensing chamber 11.

[0037] On this basis, a temperature-sensitive deformation member 64 is provided on the vertical copper rod 63. The temperature-sensitive deformation member 64 is preferably made of nickel-titanium memory alloy, and its austenite transformation temperature is set to 23°C, which matches the critical temperature range where condensation may form in the ventilation gap 3, so as to facilitate temperature control triggering. A thermal connection is established between the interior of the temperature-sensing chamber 11 and the ventilation gap 3 through the above-mentioned heat-conducting component. At the same time, the chamber structure is isolated from the external airflow, which is beneficial for the temperature-sensitive deformation member 64 to respond accurately in a stable environment. When the temperature is lower than the set threshold, the temperature-sensitive deformation member 64 maintains its original state of being coaxial with the vertical copper rod 63 and does not deform; when the temperature rises and exceeds the austenite phase transition point, the nickel-titanium deformation member undergoes controlled bending and gradually contacts the inner wall of the temperature-sensing chamber 11, thereby driving the first blocking component 42, the second blocking component 43 and the air supply mechanism 5 connected thereto into the corresponding action state. This structural arrangement enables temperature linkage control of the circuit breaker ventilation system by leveraging metal thermal conductivity and the thermal response of the memory alloy without the use of electronic sensors or active control circuits, offering advantages of structural simplification and improved environmental adaptability. The terms "copper plate 61" and "copper rod" refer to metal components with thermal conductivity, which can be in the form of sheets, columns, or strips, and can be flexibly configured depending on the spatial structure of the circuit breaker.

[0038] In some embodiments, combined Figure 3 、 Figure 6 as well as Figure 7 The first blocking component 42 includes a stainless steel sheet 421, a torsion spring 422, and a first pulling rope 423, which constitute a structural unit that can be flexibly opened under thermal triggering conditions. The lower edge of the stainless steel sheet 421 is hinged to the inner wall of the first chamber 411 through the torsion spring 422, and the upper edge is configured as a free end. A connecting port 411a is provided on the inner wall of the first chamber 411. The surface area of the stainless steel sheet 421 is larger than the opening area of the connecting port 411a, so that when in a fitted state, it can effectively block the air circulation between the ventilation gap 3 and the first chamber 411, which is beneficial to the circuit breaker's nighttime heat preservation and the suppression of moisture intrusion. When the torsion spring 422 is in a natural state, the stainless steel sheet 421 is fitted on the connecting port 411a and separates the first chamber 411 from the ventilation gap 3, so that the stainless steel sheet 421 remains in a naturally closed state without external force.

[0039] For example, refer to Figures 3 to 7 A first rope threading channel 13 is provided in the inner wall of the shell 1. The upper end opening of the first rope threading channel 13 is located on the inner bottom wall of the first chamber 411, and the lower end opening is located on the inner top wall of the temperature sensing chamber 11. One end of the first pulling rope body 423 is connected to the upper edge of the stainless steel sheet 421, and the other end passes downward through the first rope threading channel 13 and is connected to the top of the temperature sensing deformation part 64.

[0040] Exemplarily, during the process in which the temperature-changing mechanism 6 switches from the first state to the second state under the influence of the ambient temperature, when the temperature-sensitive deformation member 64 bends relative to the vertical copper rod 63, it pulls the first pulling rope body 423, driving the upper edge of the stainless-steel sheet 421 to elastically bend and deflect towards the inside of the first chamber 411 relative to the lower edge, so as to form a gradually narrowing guiding channel 411b in the first chamber 411 that extends from the side of the ventilation gap 3 through the communication port 411a towards the side of the arc-shaped air duct 412.

[0041] On this basis, when the temperature-sensitive deformation member 64 maintains its initial straight state at low temperature, there is no pulling force on the first pulling rope body 423, and the stainless-steel sheet 421 naturally closes by the force of the torsion spring 422; when the temperature of the ventilation gap 3 rises and the temperature-sensitive deformation member 64 bends, its end will pull the first pulling rope body 423 downward during the offset process, thereby driving the free end of the sheet to elastically deflect towards the inside of the first chamber 411 relative to the lower edge, opening the communication port 411a.

[0042] It should be noted that since the torsion spring 422 allows the stainless-steel sheet 421 to undergo local flexible deformation, a curved air guiding structure towards the first chamber 411 is formed during the opening process of the upper edge, and a gradually changing transition channel extending from the side of the ventilation gap 3 through the communication port 411a to the direction of the arc-shaped air duct 412, which helps to guide the air flow to move along the predetermined path and reduces the risk of the sudden change in wind pressure disturbing the permanent magnet mechanism 2.

[0043] The above terms such as "stainless-steel sheet 421" can be an elastic metal sheet with a thickness less than 1 mm, and the specific material can be a metal material with corrosion resistance such as SUS304. The "torsion spring 422" refers to an elastic member that provides a rotational return force, and its stiffness parameter can be adjusted according to the sheet thickness and opening angle to achieve a balance between stable closing and sensitive response. The design in this embodiment can improve the response flexibility and environmental adaptability of the circuit breaker ventilation system to a certain extent under different temperature and humidity conditions.

[0044] Exemplarily, the outer surface of the stainless-steel sheet 421 is coated with a heat-insulating coating, so that the stainless-steel sheet 421 also has the effect of heat preservation in the ventilation gap 3 after closing the communication port 4i1a.

[0045] In some embodiments, in combination with Figure 3 、 Figure 6 and Figure 7 , to achieve the controllable closing and release of the other end opening of the arc-shaped air duct 412, the second blocking assembly 43 includes a sliding bar 431, a blocking block 432, a tension spring 433 and a second pulling rope body 434. Its structural setting and functional linkage design are aimed at realizing precise opening control of the ventilation path under temperature-triggered conditions.

[0046] Exemplarily, referring to Figures 3 to 7, the second chamber 413 includes a plugging groove 413a and a sliding channel 413b that are provided on the housing 1 and communicate with each other from top to bottom. The side notch of the plugging groove 413a communicates with the outside. The arc-shaped air duct 412 is connected to the plugging groove 413a, and one end opening of the arc-shaped air duct 412 is located on the inner top wall of the plugging groove 413a. The sliding channel 413b is vertically opened in the inner wall of the housing 1 and its top end is connected to the plugging groove 413a. The sliding bar 431 is slidably inserted into the sliding channel 413b.

[0047] Exemplarily, the plugging block 432 is provided at the top end of the sliding bar 431 and is located in the plugging groove 413a. The cross-sectional area of the plugging block 432 is larger than the cross-sectional area of the sliding channel 413b. Further, it can be explained that the cross-sectional dimension of the plugging block 432 is larger than the opening dimension of the sliding channel 413b. Thus, the vertical movement in the vertical direction can effectively block or release the upper end opening of the arc-shaped air duct 412 and prevent the plugging block 432 from entering the sliding channel 413b to cause sliding failure.

[0048] Exemplarily, the tension spring 433 is provided between the bottom end of the sliding bar 431 and the inner bottom wall of the sliding channel 413b, and the tension spring 433 always has a tendency to push the plugging block 432 upward. When the tension spring � is in the natural state, the plugging block 432 fits against the inner top wall of the plugging groove 413a and plugs one end opening of the arc-shaped air duct 412. Its function is to always provide an upward elastic force, so that when the temperature sensing mechanism is not activated, the plugging block 432 is in the upward-pushed state, fitting against the inner top wall of the plugging groove 413a, and thus plugging one end opening of the arc-shaped air duct 412.

[0049] Exemplarily, to achieve temperature-triggered actions, the slider 431 is also linked to the temperature-sensitive deformation member 64 through a second pulling rope 434. Specifically, an L-shaped second rope-passing channel 14 is provided in the inner wall of the housing 1. One end of the second rope-passing channel 14 is communicated with the sliding channel 413b, and the other end is communicated with the temperature-sensitive chamber 11. One end of the second pulling rope 434 is connected to the lower end wall of the slider 431, and the other end passes through the inner circle of the tension spring 433 and the second rope-passing channel 14 and then extends horizontally into the temperature-sensitive chamber 11 and is connected to the temperature-sensitive deformation member 64. During the process of the temperature-changing mechanism 6 switching from the first state to the second state under the influence of the ambient temperature, when the temperature-sensitive deformation member 64 bends relative to the vertical copper rod 63, it pulls the second pulling rope 434, driving the slider 431 to vertically move downward against the elastic force of the tension spring 433, so that one end opening of the arc-shaped air duct 412 is opened and communicated with the blocking groove 413a. That is, when the temperature-changing mechanism 6 deforms under the influence of temperature change, the temperature-sensitive deformation member 64 bends relative to the vertical copper rod 63 and generates displacement, and the second pulling rope 434 is subjected to a pulling force, thereby driving the slider 431 to move downward, overcoming the elastic force of the tension spring 433, causing the blocking block 432 to disengage from the inner top wall of the blocking groove 413a, and exposing the opening of the arc-shaped air duct 412, realizing the communication between the arc-shaped air duct 412 and the outside.

[0050] In the above structural design, the "slider 431" should be understood as a linear member that can reciprocate axially in the sliding channel 413b. The "blocking block 432" can be made of an elastic sealing material that fits tightly with the notch, such as a silicone rubber-coated metal plate, etc. The "tension spring 433" is a spiral tension spring that provides a reset function. This structure is beneficial to realizing the automatic adjustment of the opening and closing of the air duct to a certain extent and reducing the potential impact of the environmental temperature difference on the operation stability of the device. Through the synergistic effect of the above components, the response efficiency of the circuit breaker in a temperature-abrupt environment and the overall adaptability and reliability of its system are improved.

[0051] In some embodiments, in combination with Figures 1 to 5, To actively regulate the airflow within the ventilation gap 3, a ventilation supply mechanism 5 is introduced. This ventilation supply mechanism 5 includes an opening / closing component 51 and a blower component 52, which are respectively installed on the outer wall of the housing 1 and are electrically connected to form an integrated control unit. Among them, the opening / closing component 51 is used to control the on / off state of the power supply to the blower component 52, while the blower component 52 is responsible for applying an upward airflow into the ventilation gap 3 under the condition that the opening / closing component 51 is conducting, thereby playing a role in promoting the discharge of the hot airflow. The startup condition of the ventilation supply mechanism 5 directly depends on the working state of the temperature change mechanism 6. Specifically, when the temperature change mechanism 6 is in the first state (i.e., the ambient temperature is not high), the opening / closing component 51 is not conducting, and the blower component 52 remains in the closed state; while when the temperature change mechanism 6 switches to the second state due to the increase in ambient temperature, the opening / closing component 51 starts, the blower component 52 is powered on and operates, and the airflow begins to form, which is beneficial to improving the ventilation and heat dissipation capacity of the device at high temperatures.

[0052] Exemplarily, to better achieve the above functions, the opening / closing component 51 specifically includes a storage battery 511 and a first conductive sheet 512, and the blower component 52 includes a blower 521, a second conductive sheet 522, and a blower duct 523. The storage battery 511 is disposed at a suitable position on the outer wall of the housing 1 and serves as an independent power supply for the entire ventilation system. The first conductive sheet 512 is disposed on the side wall of the temperature-sensitive deformation member 64 and is electrically connected to the storage battery 511 through a spring wire; the second conductive sheet 522 is disposed on the inner side wall of the temperature-sensitive chamber 11 and is electrically connected to the blower 521 through another set of spring wires. When not deformed by heat, that is, when the temperature-sensitive deformation member 64 and the vertical copper rod 63 remain coaxial, the first conductive sheet 512 and the second conductive sheet 522 are separated from each other, and the circuit is in an open state, so the blower 521 does not operate powered on. When the temperature-sensitive deformation member 64 deforms due to temperature rise, generates a certain angle of offset and bends towards the side wall, the first conductive sheet 512 covered on its surface will contact the second conductive sheet 522 on the inner side wall of the temperature-sensitive chamber 11, forming an electrical connection loop, so that the storage battery 511 starts to supply power to the blower 521, and the blower 521 starts to operate.

[0053] Exemplarily, the blower 521 is installed below the storage battery 511 to facilitate wiring and the compact layout of the system structure. One end of the blower duct 523 is connected to the air outlet of the blower 521, and the other end passes through the inner wall of the housing 1 and extends to the bottom of the ventilation gap 3 and is arranged with the opening facing vertically upward, so that the wind generated when the blower 521 starts can directly act on the inside of the ventilation gap 3, pushing the hot air to flow from bottom to top, which helps to cooperate with the deflection opening of the first sealing component 42 and the sliding opening of the second sealing component 43, so that when the system reaches a specific temperature threshold, the ventilation efficiency inside the housing 1 can be enhanced by combining natural and forced ventilation.

[0054] It should be noted that in this structure, the "first conductive sheet 512" and the "second conductive sheet 522" should be understood as functional conductive layers, preferably elastic metal sheets or conductive rubber sheets, which can achieve the effect of temporary closed conduction in the force-contact state; and the "spring wire" refers to a conductive connecting wire with a certain telescopic ability, whose function is to adapt to the connection change caused by the small displacement of the temperature-sensitive deformation part 64 and is not easily broken due to fatigue. Through the above structural settings, the present invention is beneficial to improving the response ability of the sectionalizing circuit breaker under overheating conditions to a certain extent, realizing the automatic opening and closing action of the ventilation and heat dissipation system without relying on an external control circuit, and enhancing the independence and adaptability of the device.

[0055] It should be noted that in the prior art, common magnetic control mechanisms mostly use soft magnetic materials in cooperation with electromagnetic coils for driving. However, during long-term operation, they are easily affected by comprehensive factors such as external water vapor erosion, humidity change, and temperature rise, resulting in a gradual decline in magnetic performance and even demagnetization, seriously affecting the stability of the overall performance of the circuit breaker and the response reliability. Especially for environmental conditions such as high temperature and high humidity, the degradation rate of its magnetic performance is significantly accelerated. To overcome the above deficiencies, this application uses a neodymium iron boron permanent magnet mechanism to replace the traditional magnetic control mechanism, giving full play to its advantages of stable magnetic performance and no need for continuous power supply to maintain the magnetic field. However, considering that the permanent magnet mechanism 2 made of neodymium iron boron is sensitive to temperature, especially irreversible demagnetization may occur when the temperature is higher than 60°C, so this application further cooperates with the setting of a temperature change mechanism 6, a first sealing component 42, a second sealing component 43, and a air supply mechanism 5. Through the automatic response ability of the temperature change mechanism 6, when the temperature in the ventilation gap exceeds the preset threshold of 26°C, it has already started to drive the first sealing component 42 and the second sealing component 43 to open the ventilation channel 41 in sequence, and make the air supply mechanism 5 start automatically, sending external cold air into the ventilation gap 4 in a bottom-up form, thereby effectively reducing the ambient temperature around the permanent magnet mechanism 2. This structural design improves the overall temperature control response speed and heat dissipation efficiency without changing the initial magnetic output state of the permanent magnet mechanism 2, making the environment where the permanent magnet mechanism 2 is located not easily rise to 60°C, which is beneficial to maintaining the magnetic stability of the permanent magnet mechanism 2 for a long time and ensuring the reliability and service life of the sectionalizing circuit breaker in different operating environments.

[0056] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention.

Claims

1. A fast boundary-breaking circuit breaker, characterized in that, Comprising: A housing (1) with a hollow interior; A permanent magnet mechanism (2) disposed within the housing (1), with a ventilation gap (3) reserved between the permanent magnet mechanism (2) and the inner wall of the housing (1), and an anti-rust agent coated on the outer surface of the permanent magnet mechanism (2); A ventilation mechanism (4) including a ventilation passage (41), a first blocking assembly (42), and a second blocking assembly (43). The ventilation passage (41) is formed in the side wall of the housing (1), with one end communicating with the ventilation gap (3) and the other end communicating with the outside. The first blocking assembly (42) is disposed on the housing (1) at the opening of one end of the ventilation passage (41) to control the opening and closing of the opening at one end of the ventilation passage (41), and the second blocking assembly (43) is disposed on the housing (1) at the opening of the other end of the ventilation passage (41) to control the opening and closing of the opening at the other end of the ventilation passage (41); An air supply mechanism (5) disposed on the housing (1) to supply air upward into the ventilation gap (3); A temperature change mechanism (6) disposed within the housing (1) to automatically control the opening and closing of the first blocking assembly (42) and the second blocking assembly (43) and synchronously control the opening and closing of the air supply mechanism (5) under temperature change conditions. The temperature change mechanism (6) has a switchable first state and second state; wherein, When the temperature value in the ventilation gap (3) is less than or equal to the set threshold, the temperature change mechanism (6) is in the first state, synchronously driving the first blocking assembly (42) and the second blocking assembly (43) to be in a state of closing the ventilation passage (41), and at the same time the air supply mechanism (5) is in a stopped operating state; When the temperature value in the ventilation gap (3) is greater than the set threshold, the temperature change mechanism (6) automatically switches to the second state. During the switching process, after the first blocking assembly (42) and the second blocking assembly (43) sequentially open the end openings of the ventilation passage (41), the air supply mechanism (5) is then started.

2. The fast boundary circuit breaker according to claim 1, wherein The ventilation passage (41) includes a first chamber (411), an arc-shaped air duct (412), and a second chamber (413), wherein, The first chamber (411) is disposed on the inner wall of the housing (1) close to the ventilation gap (3), and the first blocking assembly (42) is disposed between the first chamber (411) and the ventilation gap (3) to control the connection and disconnection between the first chamber (411) and the ventilation gap (3); The second chamber (413) is disposed on the outer wall of the housing (1) close to the outside, the arc-shaped air duct (412) is disposed within the housing (1) to connect the first chamber (411) and the second chamber (413), and the second blocking assembly (43) is disposed within the second chamber (413) to control the connection and disconnection between the second chamber (413) and the arc-shaped air duct (412).

3. The fast boundary breaker according to claim 2, characterized in that, The height of the first chamber (411) is higher than the height of the second chamber (413); And / or, the arc-shaped air duct (412) has a first end and a second end, the first end is connected to the first chamber (411), the second end is connected to the second chamber (413), and the height of the first end is higher than the height of the second end; And / or, the cross-sectional shape of the curved air duct (412) is configured as a curved wave shape.

4. A fast-breaking circuit breaker according to claim 2, characterized in that, The temperature-changing mechanism (6) comprises a copper plate (61), a transverse copper rod (62), a vertical copper rod (63), and a temperature-sensitive deformation member (64); wherein, The lower inner wall of the housing (1) is provided with a side groove communicating with the ventilation gap (3), and the copper plate (61) is adapted to be embedded in the side groove; A temperature-sensing chamber (11) is provided in the inner wall of the housing (1), and the temperature-sensing chamber (11) is connected to the side groove via a transverse channel (12). The transverse copper rod (62) is passed through the transverse channel (12) and is connected to the copper plate (61) at one end and extends into the temperature-sensing chamber (11) at the other end. The vertical copper rod (63) is vertically connected to the other end of the transverse copper rod (62), and the temperature-sensing deformation member (64) is provided on the vertical copper rod (63). When the temperature-changing mechanism (6) is in the first state, the temperature-sensitive deformation member (64) is coaxial with the vertical copper rod (63); When the temperature-changing mechanism (6) is in the second state, the temperature-sensitive deformation member (64) bends relative to the vertical copper rod (63).

5. A fast boundary-breaking circuit breaker according to claim 4, characterized in that, The temperature-sensitive deformation member (64) is configured to be made of nickel-titanium memory alloy, and the austenite transformation temperature value of the nickel-titanium memory alloy is configured to be 23°C, and the austenite transformation temperature value of the nickel-titanium memory alloy is configured to be a set threshold value, wherein, When the temperature value in the temperature sensing chamber (11) and the ventilation gap (3) is less than or equal to a set threshold value, the temperature sensing deformation member (64) is in an initial state coaxial with the vertical copper rod (63); When the temperature value in the temperature sensing chamber (11) and the ventilation gap (3) is greater than a set threshold value, the temperature sensing deformation member (64) bends relative to the vertical copper rod (63) and contacts the inner wall of the temperature sensing chamber (11).

6. The fast boundary breaker according to claim 4, characterized in that The first blocking component (42) comprises a stainless steel sheet (421), a torsion spring (422) and a first pulling rope (423), wherein: The lower edge of the stainless steel sheet (421) is hingedly connected to the inner wall of the first chamber (411) via a torsion spring (422), and the upper edge is configured as a free end. A communication opening (411a) is provided on the inner wall of the first chamber (411). The surface area of the stainless steel sheet (421) is larger than the opening area of the communication opening (411a). When the torsion spring (422) is in a natural state, the stainless steel sheet (421) is attached to the communication opening (411a) and separates the first chamber (411) from the ventilation gap (3). A first rope threading channel (13) is provided in the inner wall of the housing (1). The upper end opening of the first rope threading channel (13) is located on the inner bottom wall of the first chamber (411), and the lower end opening is located on the inner top wall of the temperature sensing chamber (11). One end of the first pulling rope body (423) is connected to the upper edge of the stainless steel sheet (421), and the other end passes downward through the first rope threading channel (13) and is connected to the top end of the temperature sensing deformation member (64). During the process that the temperature change mechanism (6) switches from the first state to the second state under the influence of the ambient temperature, when the temperature sensing deformation member (64) bends relative to the vertical copper rod (63), it pulls the first pulling rope body (423), driving the upper edge of the stainless steel sheet (421) to elastically bend and deflect towards the inside of the first chamber (411) relative to the lower edge, so as to form a gradually narrowing guiding channel (411b) in the first chamber (411) from the side of the ventilation gap (3), through the communication port (411a), and towards the side of the arc-shaped air duct (412).

7. A fast boundary breaker according to claim 6, characterized in that, A heat insulation coating is coated on the outer surface of the stainless steel sheet (421).

8. A fast-separating circuit breaker according to claim 4, characterized in that, The second blocking assembly (43) includes a sliding strip (431), a blocking block (432), a tension spring (433), and a second pulling rope body (434), wherein The second chamber (413) includes a blocking groove (413a) and a sliding channel (413b) provided on the housing (1) and communicating from top to bottom. The side slot opening of the blocking groove (413a) communicates with the outside. The arc-shaped air duct (412) is connected to the blocking groove (413a), and one end opening of the arc-shaped air duct (412) is located on the inner top wall of the blocking groove (413a). The sliding channel (413b) is vertically opened in the inner wall of the housing (1) and the top end is connected to the blocking groove (413a). The sliding strip (431) is slidably inserted into the sliding channel (413b). The blocking block (432) is provided at the top end of the sliding strip (431) and is located in the blocking groove (413a). The cross-sectional area of the blocking block (432) is larger than the cross-sectional area of the sliding channel (413b). The tension spring (433) is provided between the bottom end of the sliding strip (431) and the inner bottom wall of the sliding channel (413b), and the tension spring (433) always has a tendency to push the blocking block (432) upward, so that when the tension spring (433) is in a natural state, the blocking block (432) fits on the inner top wall of the blocking groove (413a) and blocks one end opening of the arc-shaped air duct (412). An L-shaped second rope threading channel (14) is provided in the inner wall of the housing (1). One end of the second rope threading channel (14) is connected to the sliding channel (413b), and the other end is connected to the temperature sensing chamber (11). One end of the second pulling rope body (434) is connected to the lower end wall of the sliding strip (431), and the other end passes through the inner circle of the tension spring (433) and the second rope threading channel (14) and then extends horizontally into the temperature sensing chamber (11) and is connected to the temperature sensing deformation member (64). During the process of the temperature-changing mechanism (6) switching from the first state to the second state under the influence of the ambient temperature, when the temperature-sensitive deformation member (64) bends relative to the vertical copper rod (63), it pulls the second pulling rope body (434), driving the sliding bar (431) to vertically move downward against the elastic force of the tension spring (433), so that one end opening of the arc-shaped air duct (412) is opened and communicated with the blocking groove (413a).

9. A fast boundary-breaking circuit breaker according to claim 4, characterized in that, The air supply mechanism (5) includes an opening and closing component (51) and a blowing component (52) that are electrically connected. The opening and closing component (51) and the blowing component (52) are both arranged on the housing (1). The opening and closing component (51) is used to control the opening and closing of the blowing component (52), and the blowing component (52) is used to generate an upward wind force in the ventilation gap (3). Among them, When the temperature-changing mechanism (6) is in the first state, the opening and closing component (51) is disconnected, so that the blowing component (52) is in the closed state; When the temperature-changing mechanism (6) is in the second state, the opening and closing component (51) is activated, so that the blowing component (52) is in the operating state.

10. A fast disconnection circuit breaker according to claim 9, characterized in that, The opening and closing component (51) includes a storage battery (511) and a first conductive sheet (512). The blowing component (52) includes a blower (521), a second conductive sheet (522), and a blowing air duct (523). Among them, The storage battery (511) is arranged on the outer wall of the housing (1). The first conductive sheet (512) is covered on the side wall of the temperature-sensitive deformation member (64). The storage battery (511) is electrically connected to the first conductive sheet (512) through a spring wire; The blower (521) is arranged on the outer wall of the housing (1) and is located below the storage battery (511). The second conductive sheet (522) is covered on the inner side wall of the temperature-sensitive cavity. The blower (521) is electrically connected to the second conductive sheet (522) through a spring wire; One end of the blowing air duct (523) is communicated with the air outlet end of the blower (521), and the other end passes through the inner wall of the housing (1) and then extends to the lower end of the ventilation gap (3) and faces vertically upward; When the temperature-changing mechanism (6) is in the first state, the temperature-sensitive deformation member (64) is coaxial with the vertical copper rod (63). At this time, the first conductive sheet (512) and the second conductive sheet (522) are separated, so that the storage battery (511) and the blower (521) are disconnected; When the temperature-changing mechanism (6) is in the second state, the temperature-sensitive deformation member (64) bends relative to the vertical copper rod (63). At this time, the first conductive sheet (512) and the second conductive sheet (522) are attached, so that the storage battery (511) and the blower (521) are electrically connected.

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