A switch cabinet
By designing parallel airflow paths and conductor busbar layouts in the switch cabinet, the problem of heat accumulation at the circuit breaker and contactor terminals was solved, achieving efficient heat dissipation and improving the stability and safety of the equipment.
Patent Information
- Application Number
- CN202522509320.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-26
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-11-26
AI Technical Summary
Heat buildup at the terminals of circuit breakers and contactors in existing switchgear leads to decreased equipment performance and may even cause malfunctions such as fires, indicating poor heat dissipation.
Design a switch cabinet with an air inlet and an air outlet inside the cabinet. Airflow enters through the air inlet, exchanges heat with the heating components, and then exits through the air outlet. The length direction of the circuit breaker and contactor terminals of the heating components is parallel to the airflow, ensuring efficient heat dissipation without the need for the airflow to change direction drastically. The parallel layout of the conductive bars increases the heat dissipation area and uniformity.
It achieves good convection heat dissipation, continuously and stably removes heat, improves the electrical stability and mechanical life of the equipment, and avoids failures caused by local overheating.
Smart Images
Figure CN224947168U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of power electronic equipment, and in particular to a switch cabinet. Background Technology
[0002] In the field of power electronic equipment, commonly used switchgear requires the installation of high-current electronic components, such as circuit breakers and contactors, which are frequently used in the main circuit. These components generate heat during operation, especially at the junction between the circuit breaker terminals and the contactor terminals. Heat accumulation can lead to adverse effects, and in extreme cases, affect the performance of electronic products or even cause equipment fires and other malfunctions. Utility Model Content
[0003] This utility model discloses a switch cabinet that can dissipate heat from circuit breaker terminals and contactor terminals with good heat dissipation effect.
[0004] A switch cabinet includes: a cabinet body having an air inlet and an air outlet; and a heating element disposed inside the cabinet body, located between the air inlet and the air outlet. When airflow enters the cabinet body from the air inlet and exchanges heat with the heating element, the airflow exits from the air outlet. The heating element includes a circuit breaker and a contactor. The circuit breaker includes circuit breaker terminals, and the contactor includes contactor terminals. The length direction of the circuit breaker terminals is parallel to the direction of airflow towards the circuit breaker terminals, and the length direction of the contactor terminals is parallel to the direction of airflow towards the contactor terminals.
[0005] In some embodiments, a conductive busbar is connected between the circuit breaker terminal and the contactor terminal, the length direction of the conductive busbar being parallel to the direction of the airflow toward the conductive busbar.
[0006] In some embodiments, a plurality of conductive bars are connected between the circuit breaker terminals and the contactor terminals.
[0007] In some embodiments, the conductive busbar includes two groups, namely a first group of conductive busbars and a second group of conductive busbars. There are multiple circuit breaker terminals. One end of the first group of conductive busbars is connected to the circuit breaker terminal, and the other end of the first group of conductive busbars is connected to one side of the contactor terminal. One end of the second group of conductive busbars is connected to another circuit breaker terminal, and the other end of the second group of conductive busbars is connected to the other side of the contactor terminal.
[0008] In some embodiments, the conductive bus includes a first conductive bus, a second conductive bus, a third conductive bus, and a fourth conductive bus. There are multiple circuit breaker terminals. One end of the first conductive bus and one end of the second conductive bus are respectively connected to both sides of the circuit breaker terminal. The other end of the first conductive bus and the other end of the second conductive bus are connected to one side of the contactor terminal. One end of the third conductive bus and one end of the fourth conductive bus are respectively connected to both sides of another circuit breaker terminal. The other end of the third conductive bus and the other end of the fourth conductive bus are connected to the other side of the contactor terminal.
[0009] In some embodiments, the circuit breaker is located below or above the contactor.
[0010] In some embodiments, the air inlet is located above the front side of the cabinet, and the air outlet is located below the rear side of the cabinet.
[0011] In some embodiments, the air inlet is located below the rear side of the cabinet, and the air outlet is located above the rear side of the cabinet.
[0012] In some embodiments, the air inlet is located on the lower part of the rear side of the cabinet, and the air outlet is located on the top surface of the cabinet.
[0013] In some embodiments, there are multiple contactors, with adjacent contactors spaced apart, adjacent contactor terminals spaced apart, and adjacent circuit breaker terminals spaced apart.
[0014] Beneficial effects: Airflow enters the cabinet through the air inlet and flows along a preset airflow path, allowing the airflow to contact and exchange heat with the circuit breaker terminals and contactor terminals, thus achieving heat dissipation. Furthermore, as the airflow reaches the circuit breaker terminals and contactor terminals, because the length direction of the terminals is parallel to the airflow direction, the airflow does not need to drastically change direction or overcome significant shape resistance, allowing for sufficient contact with the surfaces of the terminals and efficient heat exchange. This smooth flow ensures that heat is continuously and stably carried away, forming a highly efficient and reliable convective cooling process with excellent heat dissipation effect. Attached Figure Description
[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 yes Figure 1 Enlarged view of part A; Figure 3 yes Figure 2 A schematic diagram of another embodiment; Figure 4 yes Figure 1 A schematic diagram of another embodiment of the circuit breaker and contactor; Figure 5 yes Figure 1 A schematic diagram of another embodiment of the air inlet and air outlet; Figure 6 yes Figure 5 A schematic diagram of another embodiment of the air inlet and air outlet.
[0017] Explanation of main labels: 1. Cabinet; 11. Air inlet; 12. Air outlet; 2. Heating element; 21. Circuit breaker; 211. Circuit breaker terminal; 22. Contactor; 221. Contactor terminal; 3. Conductor bar; 31. First group of conductor bars; 32. Second group of conductor bars; 33. First conductor bar; 34. Second conductor bar; 35. Third conductor bar; 36. Fourth conductor bar. Detailed Implementation
[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0019] Furthermore, the following descriptions of various embodiments are based on the accompanying illustrations and are used to illustrate specific embodiments that can be implemented in this application. Directional terms used in this application, such as "up," "down," "front," "back," "left," "right," "inner," "outer," and "side," are merely for reference to the accompanying illustrations. Therefore, the directional terms used are for better and clearer explanation and understanding of this application, and are not intended to indicate or imply that the referred device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0020] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "connected," "linked," and "set on" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0021] The terms "first," "second," and "third" used in the embodiments of this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0022] Combination Figure 1 and Figure 2 As shown, a switch cabinet includes: a cabinet 1, the cabinet 1 having an air inlet 11 and an air outlet 12; a heating element 2, the heating element 2 being disposed inside the cabinet 1, the heating element 2 being located between the air inlet 11 and the air outlet 12, the airflow flowing into the cabinet 1 from the air inlet 11 and exchanging heat with the heating element 2, the airflow flowing out from the air outlet 12; wherein, the heating element 2 includes a circuit breaker 21 and a contactor 22, the circuit breaker 21 including a circuit breaker terminal 211, the contactor 22 including a contactor terminal 221, the length direction of the circuit breaker terminal 211 being parallel to the airflow direction B, and the length direction of the contactor terminal 221 being parallel to the airflow direction B.
[0023] Airflow enters the cabinet through inlet 11 and flows along a preset airflow path, allowing the airflow to contact and exchange heat with the circuit breaker terminals 211 and contactor terminals 221, thus dissipating heat from them. Furthermore, as the airflow reaches the circuit breaker terminals 211 and contactor terminals 221, since the length direction of these terminals is parallel to the airflow direction B, the airflow does not need to drastically change direction or overcome significant shape resistance to fully contact the surfaces of the circuit breaker terminals 211 and contactor terminals 221 and achieve efficient heat exchange. This smooth flow ensures that heat is continuously and stably carried away, forming a highly efficient and reliable convective cooling process with excellent heat dissipation.
[0024] Optionally, combined Figure 1 and Figure 2As shown, a conductive busbar 3 is connected between the circuit breaker terminal 211 and the contactor terminal 221. The length direction of the conductive busbar 3 is parallel to the airflow direction B. When the airflow in the cabinet 1 flows towards the conductive busbar 3, since the length direction of the conductive busbar 3 is parallel to the airflow direction B, the airflow can flow closely against the surface of the conductive busbar 3, forming laminar flow or uniform turbulent flow, thereby achieving uniform and continuous heat dissipation of the conductive busbar 3 and achieving good heat dissipation effect.
[0025] Optional, combined Figure 2 As shown, multiple conductive bars 3 are connected between the circuit breaker terminal 211 and the contactor terminal 221. By setting multiple conductive bars 3 connected in parallel, their total cross-sectional area is significantly increased. On the one hand, this directly reduces the on-resistance of the circuit breaker 21 and the contactor 22, improving the current-carrying capacity per unit time and allowing the switchgear to handle higher operating currents. On the other hand, multiple conductive bars 3 provide a larger effective heat dissipation surface area. Optionally, n conductive bars 3 can be connected, where n is an integer greater than or equal to 1.
[0026] Optionally, combined Figure 2 As shown, the conductive busbar 3 includes two sets: a first set of conductive busbars 31 and a second set of conductive busbars 32. There are multiple circuit breaker terminals 211. One end of the first set of conductive busbars 31 is connected to one of the circuit breaker terminals 211, and the other end is connected to one side of the contactor terminal 221. One end of the second set of conductive busbars 32 is connected to another circuit breaker terminal 211, and the other end is connected to the other side of the contactor terminal 221. By setting the first set of conductive busbars 31 and the second set of conductive busbars 32 and connecting them to different positions of the circuit breaker terminal 211 and both sides of the contactor terminal 221 respectively, a symmetrical current input path is provided for the contactor 22. This symmetrical layout allows the current to be evenly distributed within the contactor 22, effectively avoiding problems such as localized overheating that may be caused by unilateral power supply. Meanwhile, the two sets of conductive bars 3 form parallel heat dissipation channels, increasing the total heat dissipation area and making the temperature rise on both sides of the contactor terminal 221 more uniform, thereby significantly improving the electrical stability and mechanical life of the circuit breaker 21 and the contactor 22 during operation.
[0027] In some embodiments, combined with Figure 3As shown, the conductive busbar 3 includes a first conductive busbar 33, a second conductive busbar 34, a third conductive busbar 35, and a fourth conductive busbar 36. There are multiple circuit breaker terminals 211. One end of the first conductive busbar 33 and one end of the second conductive busbar 34 are respectively connected to both sides of the circuit breaker terminal 211. The other ends of the first conductive busbar 33 and the second conductive busbar 34 are connected to one side of the contactor terminal 221. One end of the third conductive busbar 35 and one end of the fourth conductive busbar 36 are respectively connected to both sides of another circuit breaker terminal 211. The other ends of the third conductive busbar 35 and the fourth conductive busbar 36 are connected to the other side of the contactor terminal 221. By employing a four-way parallel connection structure consisting of the first conductive busbar 33 to the fourth conductive busbar 36, multiple-point, multi-path electrical connections are made between the two sides of the circuit breaker terminal 211 and the two sides of the contactor terminal 221. This design effectively distributes the total current to four independent conductive paths, significantly reducing the current carried by each conductor 3 and thus reducing the heat generated by a single conductor 3. At the same time, the four conductors 3 provide a larger total surface area for heat exchange with the airflow, thereby improving the heat dissipation effect of the connection area between the circuit breaker terminal 211 and the contactor terminal 221.
[0028] In some embodiments, combined with Figure 1 As shown, the circuit breaker 21 is located above the contactor 22; combined with Figure 4 As shown, the circuit breaker 21 is located below the contactor 22. By clarifying that the circuit breaker 21 and the contactor 22 can be arranged in two ways, with the circuit breaker 21 above the contactor 22 or the contactor 22 above the circuit breaker 21, compared with the uniformity of the traditional layout, this application can adjust the position between the circuit breaker 21 and the contactor 22 according to the internal space height of different equipment models, maintenance channel requirements, and the position of external cable inlets and outlets, etc., thereby improving the adaptability to different application scenarios and cabinet structure designs.
[0029] In some embodiments, combined with Figure 1 As shown, the air inlet 11 is located above the front side of the cabinet 1, and the air outlet 12 is located below the rear side of the cabinet 1. Because the air outlet 12 is located below the rear side of the cabinet 1, it creates a certain height and pressure difference with the air inlet 11 above the front side, driving hot air to be discharged from the air outlet 12. Simultaneously, external airflow is drawn in from the higher front air inlet 11. After entering, the airflow sinks, flows through the heating element 2 inside the cabinet, absorbs heat, becomes hot air, and then rises to the rear, forming a complete heat dissipation cycle based on natural convection, resulting in good heat dissipation.
[0030] In some embodiments, combined with Figure 5As shown, the air inlet 11 is located at the lower rear side of the cabinet 1, and the air outlet 12 is located at the upper rear side of the cabinet 1. By concentrating the air inlet 11 and the air outlet 12 on the same side of the cabinet 1 and utilizing the difference in their vertical positions, a compact and efficient local heat dissipation airflow is formed, resulting in good heat dissipation.
[0031] In some embodiments, combined with Figure 6 As shown, the air inlet 11 is located on the lower rear side of the cabinet 1, and the air outlet 12 is located on the top surface of the cabinet 1. By placing the cold air inlet on the lower rear side of the cabinet 1 and the hot air outlet on the top of the cabinet 1, a vertical heat dissipation duct with minimal resistance and the most direct path is constructed. The above scheme conforms well to the principle of natural upward movement of hot air, allowing the hot air inside the cabinet 1 to be discharged from the top via the shortest path, forming a good "chimney effect." Compared with side air outlet, the top air outlet method of the above scheme can better expel the hot air accumulated at the top of the cabinet 1, avoiding the stagnation of hot air on the top of the cabinet, and achieving better heat dissipation.
[0032] In some embodiments, combined with Figure 1 As shown, there are multiple contactors 22, with adjacent contactors 22 spaced apart, adjacent contactor terminals 221 spaced apart, and adjacent circuit breaker terminals 211 spaced apart. By creating intervals between the contactors 22, contactor terminals 221, and circuit breaker terminals 211, a clear flow path is created for airflow. This spaced layout prevents the dense arrangement of the heating elements 2 and their terminals from forming wind resistance or generating air turbulence, ensuring that the cooling airflow from the air inlet 11 to the air outlet 12 can flow smoothly and evenly over the surface of each heating element 2 and its terminals, resulting in good heat dissipation. Optionally, there are three contactors 22; in typical applications, the three contactors 22 are designated as phase A, phase B, and phase C.
[0033] The above description is only a part of the embodiments of this application and does not limit the scope of protection of this application. Any equivalent device or equivalent process transformation made based on the content of this application specification and drawings, or directly or indirectly used in other related technical fields, are similarly included in the patent protection scope of this application.
Claims
1. A switch cabinet, characterized in that, include: Cabinet (1), the cabinet (1) is provided with an air inlet (11) and an air outlet (12); Heating component (2), the heating component (2) is disposed inside the cabinet (1), the heating component (2) is located between the air inlet (11) and the air outlet (12), when the airflow flows into the cabinet (1) from the air inlet (11) and exchanges heat with the heating component (2), the airflow flows out from the air outlet (12); The heating component (2) includes a circuit breaker (21) and a contactor (22). The circuit breaker (21) includes a circuit breaker terminal (211), and the contactor (22) includes a contactor terminal (221). The length direction of the circuit breaker terminal (211) is parallel to the direction in which the airflow flows toward the circuit breaker terminal (211), and the length direction of the contactor terminal (221) is parallel to the direction in which the airflow flows toward the contactor terminal (221).
2. A switch cabinet according to claim 1, characterized in that, A conductive busbar (3) is connected between the circuit breaker terminal (211) and the contactor terminal (221), and the length direction of the conductive busbar (3) is parallel to the direction of the airflow towards the conductive busbar (3).
3. A switch cabinet according to claim 2, characterized in that, Multiple conductive bars (3) are connected between the circuit breaker terminal (211) and the contactor terminal (221).
4. A switch cabinet according to claim 2, characterized in that, The conductive bus (3) includes two groups, namely a first group of conductive bus (31) and a second group of conductive bus (32). There are multiple circuit breaker terminals (211). One end of the first group of conductive bus (31) is connected to the circuit breaker terminal (211), and the other end of the first group of conductive bus (31) is connected to one side of the contactor terminal (221). One end of the second group of conductive bus (32) is connected to another circuit breaker terminal (211), and the other end of the second group of conductive bus (32) is connected to the other side of the contactor terminal (221).
5. A switch cabinet according to claim 2, characterized in that, The conductive bus (3) includes a first conductive bus (33), a second conductive bus (34), a third conductive bus (35) and a fourth conductive bus (36). There are multiple circuit breaker terminals (211). One end of the first conductive bus (33) and one end of the second conductive bus (34) are respectively connected to both sides of the circuit breaker terminal (211). The other end of the first conductive bus (33) and the other end of the second conductive bus (34) are connected to one side of the contactor terminal (221). One end of the third conductive bus (35) and one end of the fourth conductive bus (36) are respectively connected to both sides of another circuit breaker terminal (211). The other end of the third conductive bus (35) and the other end of the fourth conductive bus (36) are connected to the other side of the contactor terminal (221).
6. A switch cabinet according to any one of claims 1-5, characterized in that, The circuit breaker (21) is located below or above the contactor (22).
7. A switch cabinet according to any one of claims 1-5, characterized in that, The air inlet (11) is located above the front side of the cabinet (1), and the air outlet (12) is located below the rear side of the cabinet (1).
8. A switch cabinet according to any one of claims 1-5, characterized in that, The air inlet (11) is located below the rear side of the cabinet (1), and the air outlet (12) is located above the rear side of the cabinet (1).
9. A switch cabinet according to any one of claims 1-5, characterized in that, The air inlet (11) is located on the lower side of the rear side of the cabinet (1), and the air outlet (12) is located on the top surface of the cabinet (1).
10. A switch cabinet according to claim 5, characterized in that, There are multiple contactors (22), with adjacent contactors (22) spaced apart, adjacent contactor terminals (221) spaced apart, and adjacent circuit breaker terminals (211) spaced apart.