Circuit breaker
By incorporating heat dissipation holes and a detachable heat dissipation structure on the circuit breaker housing, the problem of poor heat dissipation under high loads is solved, achieving efficient heat dissipation and improved equipment stability, reducing the temperature of the stationary contacts, and ensuring electrical safety.
Patent Information
- Application Number
- CN202520144545.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2035-01-21
AI Technical Summary
Existing circuit breakers have poor heat dissipation under long-term high-load operation, resulting in excessive temperature, which can cause malfunctions and electrical safety hazards.
Heat dissipation holes are provided on the circuit breaker housing, and a detachable heat dissipation structure is used to contact the stationary contact. The heat dissipation structure absorbs the heat from the stationary contact and is discharged through the heat dissipation holes, increasing the heat dissipation area and air convection channel. High thermal conductivity metal materials such as iron or copper are used as heat dissipation structures.
It effectively improves the heat dissipation of the circuit breaker, reduces the temperature rise of the stationary contacts, avoids excessive temperature, improves the stability and safety of the equipment, and facilitates the maintenance and replacement of the heat dissipation structure and housing, saving operating costs.
Smart Images
Figure CN223809042U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of switch, in particular to a circuit breaker. BACKGROUND
[0002] The circuit breaker is an electrical device capable of controlling the on-off of current, which generally comprises a shell, a static contact and a dynamic contact. When the static contact and the dynamic contact are in contact, the circuit current of the circuit breaker is conducted, and the circuit works normally.
[0003] Under the condition of long-time high-load work, heat is generated inside the circuit breaker. If the heat inside the circuit breaker is not discharged in time, the temperature of the circuit breaker will be too high. The high temperature will not only cause the misoperation of the circuit breaker, but also bring electrical safety hazards to the use of the product, such as causing the premature aging of the insulation part, the accelerated oxidation of the contact point and other adverse conditions.
[0004] In the prior art, a heat dissipation hole is generally formed on the shell to discharge the heat inside the circuit breaker. However, this method has poor heat dissipation effect. CONTENT OF THE INVENTION
[0005] The present application provides a circuit breaker for effectively improving the heat dissipation effect of the circuit breaker.
[0006] In order to achieve the above-mentioned purpose, the present application provides a circuit breaker, which comprises a shell, a static contact and a heat dissipation structure, and a heat dissipation hole is formed on the shell. The static contact is arranged in a cavity of the shell. The static contact comprises an installation section and a contact section which are connected to each other. The installation section is connected to the shell. The heat dissipation structure is arranged in the cavity, and the heat dissipation structure is in contact with the contact section.
[0007] When the circuit current of the circuit breaker is conducted and the circuit works normally, the heat dissipation structure is in direct contact with the static contact, the heat generated by the static contact during work can be conducted to the heat dissipation structure, the heat dissipation structure absorbs the heat generated by the static contact and dissipates the absorbed heat. The arrangement of the heat dissipation structure can increase the heat dissipation area, reduce the temperature rise of the static contact and avoid the over-high temperature of the static contact. The arrangement of the heat dissipation hole is beneficial to the heat absorbed by the heat dissipation structure from the static contact being discharged through the heat dissipation hole. The cooperation of the heat dissipation hole and the heat dissipation structure can dissipate the heat generated by the static contact in time, which can effectively improve the heat dissipation effect of the circuit breaker.
[0008] In a possible implementation manner, the heat dissipation structure is detachably arranged on the shell.
[0009] When the heat dissipation structure or the shell needs to be repaired, the heat dissipation structure can be detached from the shell, so that the heat dissipation structure and the shell are conveniently repaired.
[0010] In a possible implementation, the inner wall of the shell is provided with a support boss at a position corresponding to the contact section. The heat dissipation structure comprises a heat conduction part, which is located between the support boss and the contact section, and the contact section is used to press the heat conduction part against the support boss.
[0011] When the heat dissipation structure or the shell needs to be repaired, the heat dissipation structure can be detached from the shell, so that the heat dissipation structure and the shell are conveniently repaired.
[0012] In a possible implementation, the side of the support boss close to the heat conduction part is provided with one of a recess and a protrusion, and the side of the heat conduction part close to the support boss is provided with the other one of the recess and the protrusion.
[0013] When the heat dissipation structure or the shell needs to be repaired, the heat dissipation structure can be detached from the shell, so that the heat dissipation structure and the shell are conveniently repaired.
[0014] In a possible implementation, the heat dissipation structure further comprises a heat dissipation part, which is arranged on the heat conduction part and extends from the heat conduction part to the side of the support boss away from the heat conduction part.
[0015] When the heat dissipation structure or the shell needs to be repaired, the heat dissipation structure can be detached from the shell, so that the heat dissipation structure and the shell are conveniently repaired.
[0016] In a possible implementation, the heat dissipation part is arranged along the circumferential edge of the heat conduction part, the heat dissipation part surrounds to form a heat dissipation space, and the support boss is located in the heat dissipation space.
[0017] When the technical scheme is adopted, the heat dissipation structure with the opening can be formed, the side of the heat conduction part away from the contact section, the wall surface of the heat dissipation part close to the heat dissipation space and the wall surface of the heat dissipation part away from the heat dissipation space can all be in contact with air, so as to facilitate heat exchange with air.
[0018] In a possible implementation, the heat dissipation part is provided with a gap at a corner position corresponding to the heat conduction part.
[0019] When the technical scheme is adopted, the gap can form an air flow channel, facilitating the convection of air in the heat dissipation space and external air, which helps to dissipate the heat of the heat dissipation structure. Further, the heat of the contact section can be reduced, and the heat dissipation effect of the circuit breaker can be effectively improved.
[0020] In a possible implementation, the shell is provided with oppositely arranged limiting bosses, and the limiting bosses are used to limit contact with the heat dissipation part.
[0021] When the technical scheme is adopted, the heat dissipation structure is prevented from rotating relative to the supporting boss, and the stability of the heat dissipation structure arranged on the supporting boss is enhanced.
[0022] In a possible implementation, the side of the heat dissipation part away from the heat conduction part has a gap with the shell.
[0023] When the technical scheme is adopted, the gap between the heat dissipation part and the shell can form an air flow channel, facilitating the convection of air in the heat dissipation space and external air, which helps to dissipate the heat of the heat dissipation structure. Further, the heat of the contact section can be reduced, and the heat dissipation effect of the circuit breaker can be effectively improved.
[0024] In a possible implementation, the heat dissipation part and the heat conduction part are integrally formed.
[0025] When the technical scheme is adopted, on the one hand, during actual installation, the matching installation time of the heat dissipation part and the heat conduction part is saved, the error caused by human operation is reduced, and the installation efficiency is improved. On the other hand, the heat dissipation part and the heat conduction part are integrally formed, secondary processing is avoided, the flaws and defects on the surfaces of the heat dissipation part and the heat conduction part are reduced, the physical and chemical properties of the heat dissipation structure are improved, and the structural strength of the heat dissipation structure is enhanced. Furthermore, the heat dissipation part and the heat conduction part are integrally formed, the heat dissipation part and the heat conduction part can be tightly combined, the failure rate caused by loosening or damage of the heat dissipation part and the heat conduction part is reduced, and the overall stability of the heat dissipation structure is improved.
[0026] In a possible implementation, the heat dissipation structure is an iron heat dissipation structure or a copper heat dissipation structure.
[0027] When the above technical solution is adopted, the heat dissipation structure adopts a metal material with a relatively high thermal conductivity, can timely conduct and dissipate the heat generated by the contact section, helps to reduce the heat of the contact section, and effectively improves the heat dissipation effect of the circuit breaker. BRIEF DESCRIPTION OF DRAWINGS
[0028] Figure 1 A cross-sectional schematic view of the circuit breaker is provided for the embodiments of the present application.
[0029] Figure 2 A position relationship schematic view of the shell and the heat dissipation structure is provided for the embodiments of the present application.
[0030] Figure 3 A structure schematic view of the static contact is provided for the embodiments of the present application. Figure 1 .
[0031] Figure 4 A structure schematic view of the static contact is provided for the embodiments of the present application. Figure 2 .
[0032] Figure 5 A structure schematic view of the shell is provided for the embodiments of the present application.
[0033] Figure 6 A structure schematic view of the heat dissipation structure is provided for the embodiments of the present application. Figure 1 .
[0034] Figure 7 A structure schematic view of the heat dissipation structure is provided for the embodiments of the present application. Figure 2 .
[0035] Explanation of reference signs:
[0036] 1 - shell, 11 - support boss, 111 - recess, 12 - limiting boss, 13 - through hole, 14 - limiting hole, 2 - static contact,
[0037] 21 - mounting section, 22 - contact section, 23 - static contact point, 24 - threaded hole, 25 - limiting column, 3 - moving contact, 4 - heat dissipation structure,
[0038] 41 - heat conduction part, 411 - protruding part, 42 - heat dissipation part, 43 - gap. DETAILED DESCRIPTION
[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application; the use herein of terms such as "comprise" and "comprising", or "include" and "including" or "has" and "having" and any variations thereof, is intended to cover a non-exclusive inclusion.
[0041] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another.
[0042] The positional words appearing in the following description are the directions shown in the drawings, and are not intended to limit the specific structure of the application. For example, in the description of the application, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.
[0043] In addition, the terms "first", "second", etc. in the specification and claims of the application or the above drawings are used to distinguish different objects, and are not intended to describe a particular order, and can explicitly or implicitly include one or more of the features.
[0044] In the description of the application, unless otherwise specified, "a plurality of" means two or more (including two), and similarly "a plurality of groups" means two or more groups (including two groups).
[0045] Please refer to Figure 1 and Figure 2 As shown in FIGS. 1 and 2, the circuit breaker provided by the embodiments of the application comprises a housing 1, a static contact 2 and a heat dissipation structure 4, wherein the static contact 2 is arranged in the cavity of the housing 1.
[0046] Specifically, please refer to Figure 3 and Figure 4As shown, the static contact 2 comprises a mounting segment 21 and a contact segment 22 connected with each other. The mounting segment 21 is connected with the shell 1, and the contact segment 22 is used to contact with a moving contact 3 comprised by the circuit breaker.
[0047] In some embodiments, in combination with Figure 1 and Figure 3 , the static contact 2 further comprises a static contact point 23 arranged on the contact segment 22, and the static contact point 23 is used to contact with the moving contact 3. When the static contact point 23 contacts with the moving contact 3, the circuit current of the circuit breaker is on, and the circuit works normally. When the static contact point 23 is separated from the moving contact 3, the circuit current of the circuit breaker is off.
[0048] It should be noted that when the static contact point 23 contacts with the moving contact 3, there is a contact resistance between the static contact point 23 and the moving contact 3. When the circuit current of the circuit breaker is on, and the circuit works normally, the static contact 2 will continuously generate heat.
[0049] In specific implementation, the mounting segment 21 can be processed and formed together with the contact segment 22, that is, the static contact 2 is a one-piece structure. Of course, the mounting segment 21 can also be fixedly connected with the contact segment 22 by welding, riveting or the like to form the static contact 2. The forming mode of the static contact 2 is not specifically limited here, and is subject to actual conditions.
[0050] In actual conditions, the mounting segment 21 is connected with the shell 1, and the mounting segment 21 is fixedly connected with the shell 1, so as to fixedly install the static contact 2 on the shell 1.
[0051] The connection mode of the mounting segment 21 and the shell 1 can be riveting, clamping or the like. In fact, in the embodiments provided in the present application, as shown in Figure 1 , Figure 3 and Figure 4 , the mounting segment 21 is connected with the shell 1 by a screw.
[0052] In this case, as shown in Figure 2 and Figure 5 , a through hole 13 is formed on the shell 1. Correspondingly, as shown in Figure 3 and Figure 4 , a threaded hole 24 is formed at the corresponding position of the static contact 2.
[0053] In specific installation, taking the placement direction of the circuit breaker shown in Figure 1 as an example, the screw can be inserted into the through hole 13 from the lower side of the shell 1 and threaded connected with the threaded hole 24. The screw is tightened, so that the static contact 2 and the shell 1 can be connected by the screw.
[0054] Further, in order to enhance the firmness of the connection between the static contact 2 and the shell 1, a plurality of through holes 13 can be formed on the shell 1, and correspondingly, threaded holes 24 can be formed on the static contact 2 at positions corresponding to the through holes 13.
[0055] The number of the through holes 13 is not specifically limited herein, and for example, the number of the through holes 13 can be two, three, four or more. The number of the threaded holes 24 is the same as that of the through holes 13, and the positions of the threaded holes 24 correspond to those of the through holes 13. In this way, the number of the screws is the same as that of the through holes 13.
[0056] In the embodiments provided in the present application, the number of the through holes 13 is two, as shown in Figure 3 and Figure 4 , the number of the threaded holes 24 is two.
[0057] In addition, it should be noted that, as shown in Figure 2 , Figure 4 and Figure 5 , one of the limiting hole 14 and the limiting post 25 is arranged on the shell 1, and the other one is arranged on the static contact 2.
[0058] The arrangement of the limiting post 25 and the limiting hole 14 can facilitate the positioning and matching of the static contact 2 and the shell 1 when connecting the static contact 2 and the shell 1, thereby improving the installation efficiency. In addition, when the limiting post 25 and the limiting hole 14 cooperate, the static contact 2 can be limited, thereby enhancing the firmness of the installation of the static contact 2 on the shell 1 and reducing the probability of misalignment between the static contact 2 and the shell 1.
[0059] In specific implementation, the limiting hole 14 can be arranged on the shell 1, and correspondingly, the limiting post 25 can be arranged on the static contact 2. Alternatively, the limiting post 25 can be arranged on the shell 1, and correspondingly, the limiting hole 14 can be arranged on the static contact 2. The specific arrangement is not limited herein.
[0060] In the embodiments provided in the present application, as shown in Figure 2 and Figure 5 , the limiting hole 14 is arranged on the shell 1. As shown in Figure 4 , the limiting post 25 is arranged on the static contact 2.
[0061] As shown in Figure 2 , the heat dissipation structure 4 is arranged in the cavity, and the heat dissipation structure 4 is in contact with the contact section 22.
[0062] The arrangement of the heat dissipation structure 4 in the cavity is not limited here. Exemplarily, the heat dissipation structure 4 can be fixedly arranged on the contact section 22, and in this case, the heat dissipation structure 4 can be in direct contact with the contact section 22. Alternatively, the heat dissipation structure 4 can be fixedly arranged on the housing 1, and in this case, when the stationary contact 2 is mounted on the housing 1, it is necessary to ensure that the contact section 22 is in contact with the heat dissipation structure 4.
[0063] Of course, the heat dissipation structure 4 can also be connected to the contact section 22 or the housing 1 by riveting, clamping or the like. The specific arrangement of the heat dissipation structure 4 in the cavity can be determined according to actual conditions.
[0064] In a specific implementation, the heat dissipation structure 4 is in contact with the side of the contact section 22 that is away from the stationary contact point 23. When the circuit in which the circuit breaker is located is in a current conduction state and the circuit is working normally, the heat dissipation structure 4 is in direct contact with the stationary contact 2, and the heat generated by the stationary contact 2 during operation can be conducted to the heat dissipation structure 4. The heat dissipation structure 4 absorbs the heat generated by the stationary contact 2 and dissipates the absorbed heat. The arrangement of the heat dissipation structure 4 can increase the heat dissipation area and reduce the temperature rise of the stationary contact 2, thereby avoiding excessively high temperature of the stationary contact 2.
[0065] In actual conditions, the housing 1 is provided with a heat dissipation hole. The arrangement of the heat dissipation hole is beneficial to the heat dissipation structure 4 to absorb the heat from the stationary contact 2 and discharge the heat through the heat dissipation hole. The cooperation between the heat dissipation hole and the heat dissipation structure 4 can promptly dissipate the heat generated by the stationary contact 2, thereby effectively improving the heat dissipation effect of the circuit breaker.
[0066] The number and position of the heat dissipation hole provided on the housing 1 are not limited here and can be determined according to actual conditions. The size and structure of the heat dissipation hole are also not limited here.
[0067] In a possible implementation, the heat dissipation structure 4 is detachably arranged on the housing 1.
[0068] In a specific implementation, the heat dissipation structure 4 can be detachably arranged on the housing 1 by a threaded connection structure. The threaded connection structure can be a screw or a bolt.
[0069] In this way, when the heat dissipation structure 4 or the housing 1 needs to be repaired, the heat dissipation structure 4 can be detached from the housing 1, thereby facilitating the repair of the heat dissipation structure 4 and the housing 1. When the heat dissipation structure 4 or the housing 1 needs to be replaced, the heat dissipation structure 4 can be detached from the housing 1, and the heat dissipation structure 4 or the housing 1 can be replaced separately, thereby avoiding the replacement of the heat dissipation structure 4 and the housing 1 together and saving the use cost.
[0070] As an optional way, as shown in Figure 5 The inner wall of the housing 1 is provided with a support boss 11 at a position corresponding to the contact section 22.
[0071] In actual conditions, the support boss 11 can be integrally formed with the shell 1. Of course, the support boss 11 can also be arranged on the inner wall of the shell 1 in a manner of welding, clamping, threaded connection, etc. Here, no specific limitation is made, and actual conditions shall prevail.
[0072] The support boss 11 can be in a cylindrical structure, a cuboid structure, a multi-prism structure, etc. No specific limitation is made herein to the specific structure and size of the support boss 11.
[0073] In an example, as shown in Figure 6 and Figure 7 , the heat dissipation structure 4 comprises a heat conduction part 41, which is located between the support boss 11 and the contact section 22, and the contact section 22 is used to press the heat conduction part 41 against the support boss 11.
[0074] The heat conduction part 41 is located between the support boss 11 and the contact section 22, and the support boss 11 supports the heat conduction part 41. When the static contact 2 is installed on the shell 1, the contact section 22 is used to press the heat conduction part 41 against the support boss 11.
[0075] In this way, not only can the heat conduction part 41 be in contact with the static contact 2 to realize the function of the heat dissipation structure 4 absorbing the heat generated by the static contact 2, but also when the static contact 2 is detached from the shell 1, the heat conduction part 41 can be directly separated from the support boss 11 to realize the detachable connection between the heat dissipation structure 4 and the support boss 11.
[0076] The heat conduction part 41 can be a heat conduction plate, which can be a circular heat conduction plate, a rectangular heat conduction plate, etc. No specific limitation is made herein to the specific size of the heat conduction plate.
[0077] In addition, it should be noted that when the static contact 2 is installed on the shell 1, the contact section 22 can press the heat conduction part 41 against the support boss 11. This indicates that the contact section 22 is indirectly supported on the support boss 11 through the heat conduction part 41, that is, the support boss 11 provides a supporting force for the contact section 22.
[0078] When the moving contact 3 is in contact with the static contact point 23, the moving contact 3 will generate a force acting on the contact section 22 in a direction away from the moving contact 3, causing the contact section 22 to move in a direction approaching the support boss 11. The provision of the support boss 11 can provide a force for the contact section 22 in a direction opposite to the force acting on the contact section 22 by the moving contact 3, thereby preventing the contact section 22 from moving in a direction away from the moving contact 3, ensuring that the position of the contact section 22 remains unchanged, and improving the stability of the contact between the moving contact 3 and the static contact 2.
[0079] Further, in combination with Figure 5 and Figure 7As shown, the support boss 11 is provided with one of the recessed portion 111 and the protruding portion 411 on the side close to the heat conduction portion 41, and the heat conduction portion 41 is provided with the other one of the recessed portion 111 and the protruding portion 411 on the side close to the support boss 11.
[0080] The provision of the recessed portion 111 and the protruding portion 411 can facilitate the positioning and matching of the heat conduction portion 41 and the support boss 11 when connecting the heat conduction portion 41 and the support boss 11 of the shell 1, thereby improving the installation efficiency. In addition, the recessed portion 111 and the protruding portion 411 can limit the heat conduction portion 41, thereby enhancing the firmness of the heat conduction portion 41 arranged on the shell 1, reducing the probability of misalignment between the heat conduction portion 41 and the shell 1, and further avoiding misalignment between the heat conduction portion 41 and the contact section 22.
[0081] In specific implementation, the recessed portion 111 can be arranged on the support boss 11, and correspondingly, the protruding portion 411 can be arranged on the heat conduction portion 41. Alternatively, the protruding portion 411 can be arranged on the support boss 11, and correspondingly, the recessed portion 111 can be arranged on the heat conduction portion 41. Here, no specific limitation is made.
[0082] In the embodiments provided in the present application, as shown in Figure 5 the recessed portion 111 is arranged on the support boss 11. As shown in Figure 7 the protruding portion 411 is arranged on the heat conduction portion 41.
[0083] As a possible implementation, as shown in Figure 6 and Figure 7 the heat dissipation structure 4 further includes a heat dissipation portion 42, the heat dissipation portion 42 is arranged on the heat conduction portion 41, and the heat dissipation portion 42 extends from the heat conduction portion 41 to the side of the support boss 11 away from the heat conduction portion 41.
[0084] The heat dissipation portion 42 can increase the heat dissipation area of the heat dissipation structure 4, the contact area between the heat dissipation structure 4 and the air is increased, the heat exchange area is large, and the heat on the static contact 2 can be timely conducted and dissipated, which is beneficial to reduce the temperature of the static contact 2 and effectively improve the heat dissipation effect of the circuit breaker.
[0085] In some embodiments, the heat dissipation portion 42 is arranged along the circumferential edge of the heat conduction portion 41, the heat dissipation portion 42 is arranged to form a heat dissipation space, and the support boss 11 is located in the heat dissipation space.
[0086] In this way, the heat dissipation structure 4 with an opening can be formed, the side of the heat conduction portion 41 away from the contact section 22, the wall surface of the heat dissipation portion 42 close to the heat dissipation space, and the wall surface of the heat dissipation portion 42 away from the heat dissipation space can all contact with the air, so as to facilitate heat exchange with the air.
[0087] The heat dissipation part 42 can be a plate-shaped structure, and specific dimensions of the heat dissipation part 42 are not limited here.
[0088] The heat dissipation part 42 can be integrally formed with the heat conduction part 41. Of course, the heat dissipation part 42 can also be connected with the heat conduction part 41 by welding, clamping, riveting or the like.
[0089] In an example, referring to FIGS. 1 and 2, Figure 6 and Figure 7 the heat dissipation part 42 is provided with a gap 43 at a corner position corresponding to the heat conduction part 41.
[0090] It should be noted that the corner of the heat conduction part 41 refers to a position where edges of the heat conduction part 41 intersect. For example, when the heat conduction part 41 is rectangular, the corner position of the heat conduction part 41 refers to a right angle position of the rectangle.
[0091] At this time, the gap 43 can form an air flow passage, facilitating the convection of air in the heat dissipation space and external air, which helps to dissipate heat of the heat dissipation structure 4, and further helps to reduce the heat of the contact section 22, effectively improving the heat dissipation effect of the circuit breaker.
[0092] In a possible implementation, the housing 1 is provided with oppositely arranged limiting bosses 12, which are used for limiting contact with the heat dissipation part 42.
[0093] In this way, the heat dissipation structure 4 is prevented from rotating relative to the support boss 11, and the stability of the heat dissipation structure 4 arranged on the support boss 11 is enhanced.
[0094] Specifically, as shown in FIG. 1, Figure 5 in fact, the limiting bosses 12 are arranged on opposite sides of the support boss 11. The oppositely arranged limiting bosses 12 are in limiting contact with the heat dissipation part 42, and the limiting bosses 12 can be tightly arranged on the wall surface of the heat dissipation part 42 away from the heat dissipation space.
[0095] The limiting bosses 12 can be integrally formed with the housing 1, and of course, the limiting bosses 12 can also be fixedly arranged on the corresponding positions of the housing 1 by welding, clamping, riveting or the like.
[0096] As a feasible way, a gap is formed between the side of the heat dissipation part 42 away from the heat conduction part 41 and the housing 1.
[0097] In this way, the gap between the heat dissipation part 42 and the housing 1 can form an air flow passage, facilitating the convection of air in the heat dissipation space and external air, which helps to dissipate heat of the heat dissipation structure 4, and further helps to reduce the heat of the contact section 22, effectively improving the heat dissipation effect of the circuit breaker.
[0098] In some embodiments, the heat dissipation part 42 is integrally formed with the heat conduction part 41.
[0099] At this time, on the one hand, during actual installation, the matching installation time of the heat dissipation part 42 and the heat conduction part 41 is saved, the error caused by human operation is reduced, and the installation efficiency is improved. On the other hand, the heat dissipation part 42 and the heat conduction part 41 are integrally formed, secondary processing is avoided, the defects and flaws on the surfaces of the heat dissipation part 42 and the heat conduction part 41 are reduced, the physical and chemical properties of the heat dissipation structure 4 are improved, and the structural strength of the heat dissipation structure 4 is enhanced. In addition, the heat dissipation part 42 and the heat conduction part 41 are integrally formed, the heat dissipation part 42 and the heat conduction part 41 can be closely combined, the failure rate caused by loosening or damage of the heat dissipation part 42 and the heat conduction part 41 is reduced, and the overall stability of the heat dissipation structure 4 is improved.
[0100] As an optional mode, the heat dissipation structure 4 is an iron heat dissipation structure 4 or a copper heat dissipation structure 4, and the heat dissipation structure 4 can also be an aluminum heat dissipation structure 4, and the actual application is not limited thereto.
[0101] The heat dissipation structure 4 adopts a metal material with a relatively high thermal conductivity, can timely conduct and dissipate the heat generated by the contact section 22, helps to reduce the heat of the contact section 22, and effectively improves the heat dissipation effect of the circuit breaker.
[0102] It should be noted that when a plurality of static contacts 2 are arranged in the circuit breaker, one heat dissipation structure 4 and one support boss 11 are arranged corresponding to each static contact 2, so as to reduce the temperature of each static contact 2 and improve the heat dissipation effect of the circuit breaker.
[0103] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood in a broad sense, for example, the "connection" or "connection" of mechanical structures can mean physical connection, for example, the physical connection can be fixed connection, for example, fixed connection through a spacer, for example, fixed connection through screws, bolts or other spacers; the physical connection can also be detachable connection, for example, mutual clamping or clamping connection; the physical connection can also be integrally connected, for example, welding, bonding or integrally formed connection. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
Claims
1. A circuit breaker characterized by, The application relates to a connector. The connector comprises: a shell with a heat dissipation hole; a static contact arranged in a cavity of the shell; the static contact comprises a mounting segment and a contact segment connected with each other; the mounting segment is connected with the shell; 2. The circuit breaker of claim 1, wherein, a heat dissipation structure arranged in the cavity; the heat dissipation structure is in contact with the contact segment.
3. The circuit breaker of claim 2, wherein, The heat dissipation structure is detachably arranged in the shell.
4. The circuit breaker of claim 3, wherein, An inner wall of the shell is provided with a supporting boss corresponding to a position of the contact segment; the heat dissipation structure comprises a heat conduction part, the heat conduction part is located between the supporting boss and the contact segment, and the contact segment is used for pressing the heat conduction part on the supporting boss.
5. The circuit breaker of claim 3, wherein, One of a recess and a protrusion is arranged on one side of the supporting boss close to the heat conduction part, and the other one of the recess and the protrusion is arranged on one side of the heat conduction part close to the supporting boss.
6. The circuit breaker of claim 5, wherein, The heat dissipation structure further comprises a heat dissipation part arranged on the heat conduction part; the heat dissipation part extends from the heat conduction part to one side of the supporting boss away from the heat conduction part.
7. The circuit breaker of claim 6, wherein, The heat dissipation part is arranged along a circumferential edge of the heat conduction part; the heat dissipation part surrounds to form a heat dissipation space; and the supporting boss is located in the heat dissipation space.
8. The circuit breaker of claim 6, wherein, The heat dissipation part is provided with a gap corresponding to a corner position of the heat conduction part.
9. The circuit breaker of claim 5, wherein, The shell is provided with oppositely arranged limiting bosses; the limiting bosses are used for limiting contact with the heat dissipation part.
10. The circuit breaker of claim 5, wherein, There is a gap between one side of the heat dissipation part away from the heat conduction part and the shell. The heat dissipation part is integrally formed with the heat conduction part; and / or the heat dissipation structure is an iron heat dissipation structure or a copper heat dissipation structure.