Switch cabinet capable of adjusting temperature rise
By dividing the switch cabinet into independent chambers and configuring independent cooling fans, combining temperature sensors and controllers to adjust the wind speed, the problem of cooling blind spots in the switch cabinet is solved, efficient heat dissipation and redundant monitoring are achieved, and the stability and safety of the equipment are improved.
Patent Information
- Application Number
- CN202421953910.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-13
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-08-13
AI Technical Summary
In existing switch cabinets, components with large heat generation, such as busbars and plum blossom contacts, are unreasonable in layout, which leads to blind spots in heat dissipation, which easily leads to equipment failures and lacks effective temperature diagnosis and control measures.
The switch cabinet is divided into two independent chambers in the front and rear, and the busbar chamber and the circuit breaker chamber are respectively set up. An independent cooling fan is arranged in each chamber. The heat is monitored using a temperature sensor and a controller, and the fan air speed is adjusted through the inverter to achieve targeted heat dissipation.
It effectively avoids the heat dissipation blind spots of key components, improves the heat dissipation efficiency of the switch cabinet, ensures stable operation of the equipment, and sets up a redundant heat monitoring system to prevent the failure of the heat dissipation system caused by a single failure.
Smart Images
Figure CN223246127U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of switch cabinets, in particular to a switch cabinet with adjustable temperature rise. Background Art
[0002] Switchgear is a critical component of power distribution systems. Its operating principle is to control and protect circuits through circuit breakers. When a fault occurs or current needs to be interrupted, the circuit breaker quickly activates, shutting off the circuit and preventing further current flow. Meanwhile, isolators isolate circuits under normal conditions. Relays and other devices monitor parameters such as current and voltage, triggering protective actions when abnormal conditions are detected, safeguarding the safe operation of the power system. Furthermore, grounding switches ensure secure grounding of equipment. Through the coordinated operation of these components, switchgear enables flexible control and reliable protection of the power system, ensuring its safe and stable operation.
[0003] As a crucial component of power system security and control, switchgear operation is crucial for safety and stability. Nearly 40% of switchgear failures in recent years are related to equipment overheating, resulting in significant losses to public safety and property. Therefore, preventing switchgear overheating failures is essential.
[0004] In the current domestic use of switchgear for various scenarios, there is a lack of measures to diagnose and control the temperature inside the switchgear. With the development of control technology, it is now possible to use sensors installed in the switchgear to collect and process data related to the temperature inside the switchgear. This data set can be used to predict and diagnose the temperature inside the switchgear, preventing overheating failures in the switchgear. Utility Model Content
[0005] The purpose of the present invention is to provide a switch cabinet with adjustable temperature rise, so as to solve the problems raised in the above background technology.
[0006] To achieve the above objectives, the present invention provides the following technical solutions:
[0007] A switch cabinet with adjustable temperature rise, wherein a first partition is provided in the cabinet body, the first partition dividing the cabinet body into two independent spaces, a first cavity and a second cavity, in front and back; a top exhaust vent is provided on the top of the cabinet body, the top exhaust vent is communicated with the first cavity and the second cavity respectively;
[0008] The first cavity is located in front of the first partition, and a circuit breaker room, a control room and a ventilation passage are provided therein. The circuit breaker room is located below the control room and the ventilation passage. A circuit breaker is provided in the control room. The control room is located in front of the ventilation passage, and a first fan is provided below the circuit breaker.
[0009] The second cavity is located on the rear side of the first partition, and a busbar chamber and a cable chamber are provided therein. The busbar chamber is located above the cable chamber. An incoming busbar and an incoming static contact are provided in the busbar chamber. The incoming static contact is installed on the first partition and is electrically connected to the plum blossom contact at the input end of the circuit breaker. An outgoing static contact and an outgoing busbar are provided in the cable chamber. The outgoing static contact is installed on the first partition and is electrically connected to the plum blossom contact at the output end of the circuit breaker. A second fan is provided at the connection between the busbar chamber and the cable chamber.
[0010] As a further embodiment of the present invention, the first fan is installed on the front panel of the cabinet, the first fan is composed of a plurality of fans, and the total air volume of the first fan is greater than 1000m3 / h.
[0011] As a further embodiment of the present invention, the second fan is installed on the rear panel of the cabinet, the second fan is composed of a plurality of fans, and the total air volume of the second fan is greater than 1000m3 / h.
[0012] As a further embodiment of the present invention, it further includes a first temperature sensor (103) and a controller (201), wherein the first temperature sensor (103) is installed on the incoming busbar (102) for monitoring the heating value of the busbar, and the first temperature sensor (103) is electrically connected to the controller (201).
[0013] As a further embodiment of the present invention, a second temperature sensor (109) is further included. The second temperature sensor (109) is installed on the plum blossom contact (108) to monitor the heat generated by the plum blossom contact (108). The second temperature sensor (109) is electrically connected to the controller (201).
[0014] As a further embodiment of the present invention, it further comprises a current transformer (107), wherein the current transformer (107) is installed on the outgoing busbar (106) for monitoring the load current, and the current transformer (107) is electrically connected to the controller (201).
[0015] As a further embodiment of the present invention, a first air outlet (112) is further provided on the front panel of the cabinet (1), and the first air outlet (112) is located below the first fan (111).
[0016] As a further embodiment of the present invention, a second air outlet (114) is further provided on the rear panel of the cabinet (1), and the second air outlet (114) is located below the second fan (113).
[0017] As a further embodiment of the present invention, it further comprises a dust filter ventilation net, wherein there are a plurality of dust filter ventilation nets, which are respectively installed on the outside of the first fan (111) and the second fan (113).
[0018] As a further embodiment of the present invention, the utility model further comprises a first frequency converter (202) and a second frequency converter (203), wherein the control ends of the first frequency converter (202) and the second frequency converter (203) are electrically connected to the controller (201), respectively, the power supply ends of the first frequency converter (202) and the second frequency converter (203) are linked to the power grid, the output end of the first frequency converter (202) is electrically connected to the first fan (111), and the output end of the second frequency converter (203) is electrically connected to the second fan (113).
[0019] The utility model is beneficial in that:
[0020] 1. The two components in the switch cabinet that generate relatively high heat are the busbar and the plum blossom contact. In this technology, they are respectively placed in two independent cavities, and an independent cooling fan is configured in each cavity for heat dissipation. The components with concentrated heat are arranged in the air flow channel generated by the fan. This targeted heat dissipation design avoids equipment failure caused by key components being in the heat dissipation blind spot in the existing technology.
[0021] 2. Two independent heat monitoring systems are set up in the switch cabinet, namely temperature monitoring and power monitoring. The two systems are redundant to prevent the cooling system from not working due to failure of a single monitoring system.
[0022] Other features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 This is a three-dimensional view of a switch cabinet with adjustable temperature rise according to the present invention;
[0024] Figure 2 This is a diagram of the internal structure of a switch cabinet with adjustable temperature rise according to the present invention;
[0025] Figure 3 yes Figure 2 Left view of;
[0026] Figure 4 yes Figure 2 Front view of
[0027] Figure 5 yes Figure 2 Rear view;
[0028] Figure 6 This is an electrical control diagram of a switch cabinet with adjustable temperature rise according to the present invention;
[0029] Figure 7 The figure is a diagram showing an embodiment of a switch cabinet with adjustable temperature rise according to the present invention.
[0030] List of reference numerals:
[0031] Cabinet 1, first cavity 01, second cavity 02, busbar chamber 001, cable chamber 002, circuit breaker chamber 003, control room 004, ventilation duct 005, first partition 101, incoming busbar 102, first temperature sensor 103, incoming static contact 104, outgoing static contact 105, outgoing busbar 106, current transformer 107, plum blossom contact 108, second temperature sensor 109, top exhaust vent 110, first fan 111, first exhaust vent 112, second fan 113, second exhaust vent 114, circuit breaker 115, controller 201, first inverter 202, second inverter 203. DETAILED DESCRIPTION
[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0033] The structure of a switchgear is generally divided into four parts, consisting of a busbar room, a circuit breaker room, a cable room, and a control room. The busbar room is located at the top of the switchgear and is used to connect the high-voltage busbar. Its design takes into account the safety, reliability, and electrical performance of the busbar connection. The circuit breaker room is equipped with circuit breakers to control and protect the circuit. Its design must meet the operational and safety requirements of high-voltage equipment. The cable room is used to lead out cables to connect to the external power system. Its design needs to consider the flexibility and insulation performance of the cable connection. The control room contains auxiliary electrical equipment for controlling and protecting the switchgear. Its design must meet the electrical performance and safety requirements of the high-voltage equipment. Overall, the various compartments of the switchgear work together to achieve flexible control and reliable protection of the power system.
[0034] Overheating in switchgear occurs mainly at the plum blossom contacts and busbars. Existing technical solutions generally use fans to dissipate heat from components inside the cabinet. However, due to the irrational layout of components inside the cabinet, after the fan introduces cold air into the cabinet, the airflow will choose the nearest channel with the least resistance to be discharged. Some components with high heat generation are located in the blind spots of the air duct and cannot be properly cooled, thus causing thermal failures.
[0035] In response to the above problems, the present application provides a switch cabinet with adjustable temperature rise to solve the problems existing in the prior art.
[0036] like Figures 1 to 5 As shown, a switch cabinet with adjustable temperature rise is provided with a first partition 101 in the cabinet body 1. The first partition 101 divides the cabinet body 1 into two independent spaces, a first cavity 01 and a second cavity 02, and a top exhaust vent 110 is provided on the top of the cabinet body 1. The top exhaust vent 110 is connected to the first cavity 01 and the second cavity 02 respectively.
[0037] The first cavity 01 is located in front of the first partition 101, and is provided with a circuit breaker chamber 003, a control chamber 004 and a ventilation passage 005. The circuit breaker chamber 003 is located below the control chamber 004 and the ventilation passage 005. A circuit breaker 115 is provided in the control chamber 004. The control chamber 004 is located in front of the ventilation passage 005. A first fan 111 is provided below the circuit breaker 115.
[0038] The second cavity 02 is located on the rear side of the first partition 101, and is provided with a busbar chamber 001 and a cable chamber 002. The busbar chamber 001 is located above the cable chamber 002. The busbar chamber 001 is provided with an incoming busbar 102 and an incoming static contact 104. The incoming static contact 104 is installed on the first partition 101 and is electrically connected to the input end plum blossom contact 108 of the circuit breaker 115. The cable chamber 002 is provided with an outgoing static contact 105 and an outgoing busbar 106. The outgoing static contact 105 is installed on the first partition 101 and is electrically connected to the output end plum blossom contact 108 of the circuit breaker 115. A second fan 113 is provided at the connection between the busbar chamber 001 and the cable chamber 002.
[0039] In this embodiment, the busbar and the plum blossom contact, the two components with the highest heat generation in the switch cabinet, are respectively arranged in two independent spaces. The busbar is located on the rear side of the first partition 101, and the plum blossom contact 108 is located on the front side of the first partition 101, and the incoming static contact 104 and the outgoing static contact 105 are installed on the first partition 101. The circuit breaker 115 is directly plugged into the first partition 101 through its plum blossom contact 108, and is connected to the incoming static contact 104 and the outgoing static contact 105 to realize the on-off control of the incoming busbar 102 and the outgoing busbar 106. The heat generated by the incoming busbar 102 and the outgoing busbar 106 is taken away by the first fan 111, and the heat generated by the plum blossom contact 108 of the circuit breaker 115 is taken away by the second fan 113.
[0040] To further illustrate the advantages of this technology, Figure 7A first fan 111 is mounted on the front panel of cabinet 1 and comprises multiple fans. The total air volume of the first fan 111 exceeds 1000 m³ / h. The first fan 111 is located below the plum blossom contacts 108 of the circuit breaker 115. The cool air drawn in by the first fan 111 flows directly upward through the heated plum blossom contacts 108, removing heat and then being discharged through the ventilation duct 005 and the top exhaust port 110.
[0041] Second fan 113 is mounted on the rear panel of cabinet 1. It consists of multiple fans, and its total air volume is greater than 1000 m³ / h. Second fan 113 is located at the junction of busbar compartment 001 and cable compartment 002. The external cold air introduced by second fan 113 can exchange heat upward with the incoming busbar 102 and downward with the outgoing busbar 106.
[0042] like Figure 6 As a specific implementation, it also includes a first temperature sensor 103 and a controller 201. The first temperature sensor 103 is installed on the incoming busbar 102 to monitor the heating value of the busbar. The first temperature sensor 103 is electrically connected to the controller 201.
[0043] In this embodiment, there can be multiple first temperature sensors 103, which are installed on busbars with different phase sequences to monitor the heat generation of the busbar. When the temperature reaches the set threshold, the second fan 113 can be started or the wind speed of the second fan 113 can be increased to improve the heat exchange effect.
[0044] like Figure 6 As a specific implementation, it also includes a second temperature sensor 109 , which is installed on the plum blossom contact 108 to monitor the heat generated by the plum blossom contact 108 , and the second temperature sensor 109 is electrically connected to the controller 201 .
[0045] In this embodiment, there can be multiple second temperature sensors 109, which are installed near different plum blossom contacts 108 respectively to monitor the heat generation of the contacts. When the temperature reaches the set threshold, the first fan 111 can be started or the wind speed of the first fan 111 can be increased to improve the heat exchange effect.
[0046] like Figure 6 As a specific implementation, it further includes a current transformer 107 , which is installed on the outgoing busbar 106 for monitoring the load current, and the current transformer 107 is electrically connected to the controller 201 .
[0047] This embodiment is used as a redundant design of the first two embodiments. When the first temperature sensor 103 or the second temperature sensor 109 fails, the heat amount in the cabinet can be determined by judging the load current.
[0048] As a further embodiment of the present invention, a first air outlet 112 is further provided on the front panel of the cabinet 1 , and the first air outlet 112 is located below the first fan 111 .
[0049] As a further embodiment of the present invention, a second air outlet 114 is further provided on the rear panel of the cabinet 1 , and the second air outlet 114 is located below the second fan 113 .
[0050] As a further embodiment of the present invention, a dust filter ventilation net is further included. There are multiple dust filter ventilation nets, which are respectively installed on the outside of the first fan 111 and the second fan 113.
[0051] As a further embodiment of the present invention, it also includes a first inverter 202 and a second inverter 203, the control ends of the first inverter 202 and the second inverter 203 are electrically connected to the controller 201 respectively, the power supply ends of the first inverter 202 and the second inverter 203 are connected to the power grid, the output end of the first inverter 202 is electrically connected to the first fan 111, and the output end of the second inverter 203 is electrically connected to the second fan 113.
[0052] In this embodiment, the controller 201 can perform PID control on the wind speed of the fan based on the detected temperature signal. The specific implementation method is that the temperature signal serves as the input end of the PID control, and the output signal of the PID controls the output frequency of the first inverter 202 or the second inverter 203, thereby realizing the control of the fan speed.
[0053] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.
[0054] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.
Claims
1. A switch cabinet with adjustable temperature rise, characterized in that: A first partition (101) is provided in the cabinet (1), and the first partition (101) divides the cabinet (1) into two independent spaces, a first cavity (01) and a second cavity (02), at the front and rear. A top air outlet (110) is provided at the top of the cabinet (1), and the top air outlet (110) is communicated with the first cavity (01) and the second cavity (02), respectively. The first cavity (01) is located in front of the first partition (101), and a circuit breaker chamber (003), a control chamber (004) and a ventilation passage (005) are provided therein; the circuit breaker chamber (003) is located below the control chamber (004) and the ventilation passage (005); a circuit breaker (115) is provided in the control chamber (004); the control chamber (004) is located in front of the ventilation passage (005); a first fan (111) is provided below the circuit breaker (115); The second cavity (02) is located at the rear side of the first partition (101), and a busbar chamber (001) and a cable chamber (002) are provided therein. The busbar chamber (001) is located above the cable chamber (002). An incoming busbar (102) and an incoming static contact (104) are provided in the busbar chamber (001). The incoming static contact (104) is installed on the first partition (101) and is in contact with the circuit breaker (115). ), an outgoing static contact (105) and an outgoing busbar (106) are provided in the cable chamber (002), the outgoing static contact (105) is installed on the first partition (101), and is electrically connected to the output end plum contact (108) of the circuit breaker (115), and a second fan (113) is provided at the connection between the busbar chamber (001) and the cable chamber (002).
2. The switch cabinet with adjustable temperature rise according to claim 1, characterized in that: The first fan (111) is installed on the front panel of the cabinet (1). The first fan (111) is composed of a plurality of fans. The total air volume of the first fan (111) is greater than 1000m 3 / h.
3. The switch cabinet with adjustable temperature rise according to claim 2, characterized in that: The second fan (113) is installed on the rear panel of the cabinet (1). The second fan (113) is composed of a plurality of fans. The total air volume of the second fan (113) is greater than 1000m 3 / h.
4. A switch cabinet with adjustable temperature rise according to claim 1 or 2, characterized in that: The invention also includes a first temperature sensor (103) and a controller (201), wherein the first temperature sensor (103) is installed on the incoming busbar (102) for monitoring the heating value of the busbar, and the first temperature sensor (103) is electrically connected to the controller (201).
5. The switch cabinet with adjustable temperature rise according to claim 4, characterized in that: The invention also includes a second temperature sensor (109), which is installed on the plum blossom contact (108) and is used to monitor the heat generated by the plum blossom contact (108). The second temperature sensor (109) is electrically connected to the controller (201).
6. The switch cabinet with adjustable temperature rise according to claim 5, characterized in that: It also includes a current transformer (107), which is installed on the outgoing busbar (106) for monitoring the load current, and is electrically connected to the controller (201).
7. The switch cabinet with adjustable temperature rise according to claim 6, characterized in that: A first air outlet (112) is also provided on the front panel of the cabinet (1), and the first air outlet (112) is located below the first fan (111).
8. The switch cabinet with adjustable temperature rise according to claim 7, characterized in that: A second air outlet (114) is also provided on the rear panel of the cabinet (1), and the second air outlet (114) is located below the second fan (113).
9. The switch cabinet with adjustable temperature rise according to claim 8, characterized in that: It also includes a dust filter ventilation net, and there are multiple dust filter ventilation nets, which are respectively installed on the outside of the first fan (111) and the second fan (113).
10. The switch cabinet with adjustable temperature rise according to claim 9, characterized in that: The invention also includes a first frequency converter (202) and a second frequency converter (203), wherein the control ends of the first frequency converter (202) and the second frequency converter (203) are electrically connected to the controller (201), respectively, the power supply ends of the first frequency converter (202) and the second frequency converter (203) are connected to the power grid, the output end of the first frequency converter (202) is electrically connected to the first fan (111), and the output end of the second frequency converter (203) is electrically connected to the second fan (113).