Switch cabinet heat dissipation system

Abstract

The utility model discloses a heat dissipation system of a switch cabinet, which belongs to the technical field of switch cabinets and is characterized in that an air inlet and an air outlet are arranged at the top of a cabinet body, and one side of the cabinet body, namely the front side of the cabinet body, is used for sequentially communicating the air inlet with a circuit breaker chamber and a maintenance chamber to form a first section of heat dissipation flow channel at one side of the cabinet body; on the other side of the cabinet body, namely the rear side of the cabinet body, the air outlet is sequentially communicated with the bus chamber and the cable chamber to form a second section of heat dissipation flow channel on the other side of the cabinet body, and the maintenance chamber is communicated with the cable chamber, so that the first section of heat dissipation flow channel and the second section of heat dissipation flow channel are communicated, and a heat dissipation channel capable of passing through all elements to be cooled is formed. Sufficient heat dissipation is realized; the heat dissipation system is simple in structure and principle, good in heat dissipation effect and convenient to implement, operate and maintain, and has good application and popularization value.

Description

Technical Field

[0001] The utility model belongs to the technical field of switch cabinets, specifically relates to the field of switch cabinet heat dissipation, and particularly relates to a switch cabinet heat dissipation system. Background Art

[0002] In recent years, medium-voltage switchgear has been developing towards high reliability and intelligence, and the requirement for the tolerance of internal fault arcs is getting higher and higher. This has led to a more severe heat dissipation environment inside the switchgear, posing a severe challenge to the heat dissipation performance of the switch cabinet.

[0003] Currently, the heat dissipation system of existing intelligent switch cabinets mainly adopts double-flow heat dissipation. The specific heat dissipation layout is as follows: Air enters from the lower front side of the cabinet body of the switch cabinet, and is divided into 3 flows after passing through the circuit breaker chamber and the cable chamber respectively, and finally flows out from the circuit breaker chamber, the top of the busbar chamber above the cable chamber, and the top of the cable chamber. Although it can effectively dissipate heat inside the cabinet; however, the design of the double-flow channel has certain limitations, specifically manifested in: First, due to the large number of component chambers that need to dissipate heat, the use of the double-flow channel design results in most of the air flow passing through the circuit breaker chamber side; while a small part of the air flow passes through the cable chamber and the busbar chamber side; this will lead to the heat dissipation effect on the cable chamber and busbar chamber side, especially manifested in the problems of uneven and insufficient heat dissipation; once the heat dissipation performance cannot be guaranteed, it will greatly affect the working performance of the switch electrical components and even affect the service life of the switch electrical components; Second, since the air inlet of the existing heat dissipation system is designed at the lower front side of the cabinet, when a discharge phenomenon occurs in the switch cabinet, the arc is likely to spray out from the air inlet at the lower front side of the cabinet, causing harm to maintenance personnel and posing certain potential safety hazards.

[0004] It can be seen that due to the use of the double-flow channel design in the existing heat dissipation system, the component chambers inside the switch cabinet are not sufficiently cooled, affecting the working performance and service life of the switch electrical components. Summary of the Utility Model

[0005] In order to overcome the above technical defects, the utility model provides a switch cabinet heat dissipation system, which can solve the technical problems that the existing heat dissipation system, due to the use of the double-flow channel design, causes insufficient heat dissipation in the component chambers inside the switch cabinet, affecting the working performance and service life of the switch electrical components.

[0006] In order to achieve the above purpose, the utility model adopts the following technical content:

[0007] A switch cabinet heat dissipation system includes an air inlet and an air outlet opened at the top of the cabinet body;

[0008] Located on one side of the cabinet body, the air inlet is sequentially communicated with the circuit breaker chamber and the maintenance chamber to form a first-stage heat dissipation flow channel;

[0009] It is located on the other side of the cabinet body. The air outlet is sequentially communicated with the busbar chamber and the cable chamber to form a second-stage heat dissipation flow channel;

[0010] The maintenance room is communicated with the cable chamber to realize the conduction of the first-stage heat dissipation flow channel and the second-stage heat dissipation flow channel.

[0011] Furthermore, a blower is arranged at the air inlet; an exhaust fan is arranged at the air outlet.

[0012] Furthermore, the air inlet is vertically opened directly above the circuit breaker chamber; the geometric centers of each section of the first-stage heat dissipation flow channel are located on the same straight line.

[0013] Furthermore, the air outlet is vertically opened directly above the busbar chamber; the geometric centers of each section of the second-stage heat dissipation flow channel are located on the same straight line.

[0014] Furthermore, partitions are arranged between the circuit breaker chamber and the maintenance room, between the busbar chamber and the cable chamber, and between the maintenance room and the cable chamber. The partitions are provided with ventilation holes for the airflow to pass through.

[0015] Furthermore, the partition is made of a metal plate that meets the IP2X protection level.

[0016] Furthermore, temperature sensors are arranged in the circuit breaker chamber, the busbar chamber, and the cable chamber.

[0017] Furthermore, a controller is arranged in the instrument room. The controller is electrically connected to each of the temperature sensors;

[0018] A blower is arranged at the air inlet; an exhaust fan is arranged at the air outlet;

[0019] The controller is electrically connected to the blower and the exhaust fan respectively.

[0020] Furthermore, both the air inlet and the air outlet are communicated with the atmosphere.

[0021] Furthermore, the centers of the air inlet and the air outlet are located on the same horizontal line.

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] The utility model provides a heat dissipation system for a switch cabinet. The heat dissipation system firstly opens an air inlet and an air outlet on the top of a cabinet body. On one side of the cabinet body, i.e., the front side of the cabinet body, the air inlet is connected with a circuit breaker room and a maintenance room in sequence, so as to form a first section of heat dissipation flow channel on one side of the cabinet body; on the other side of the cabinet body, i.e., the rear side of the cabinet body, the air outlet is connected with a busbar room and a cable room in sequence, so as to form a second section of heat dissipation flow channel on the other side of the cabinet body, and the maintenance room is connected with the cable room, so as to complete the conduction of the first section of heat dissipation flow channel and the second section of heat dissipation flow channel, form a heat dissipation channel that can pass through all components to be cooled, and realize sufficient heat dissipation; the heat dissipation system has simple structure and principle, good heat dissipation effect, is easy to implement and maintain, and has good promotion and application value.

[0024] In addition, the air inlet and outlet are located at the top of the switch cabinet. When discharge occurs in the switch cabinet, the arc will be ejected from the air inlet and outlet on the top, which will not harm the maintenance personnel in front of the cabinet, greatly improving the safety performance of the heat dissipation system.

[0025] Preferably, in the utility model, a blower is provided at the air inlet and an exhaust fan is provided at the air outlet, so as to force air flow and further enhance the heat dissipation effect; the blower provides positive pressure to accelerate the air entering the switch cabinet; the exhaust fan forms negative pressure to quickly extract the hot air, and the synergistic effect of the two significantly improves the efficiency and effect of the heat dissipation system.

[0026] Preferably, in the utility model, the air inlet is vertically opened directly above the circuit breaker chamber, and the geometric centers of each section of the first heat dissipation channel are on the same straight line. Such a design ensures the shortest air flow path and the smallest resistance, improves the air flow efficiency, and thus optimizes the heat dissipation effect.

[0027] Preferably, in the utility model, the exhaust port is vertically opened just above the busbar chamber, and the linearity of the second section of the heat dissipation flow channel is maintained, which helps to quickly discharge heat from the busbar chamber and the cable chamber, reducing heat accumulation in the cabinet.

[0028] Preferably, in the present invention, partitions are provided between the chambers of each component, and ventilation holes are provided on the partitions, which not only ensures the independence of each chamber, but also allows necessary air circulation; this design not only maintains electrical safety, but also takes into account the heat dissipation requirements. The use of metal plates that meet the IP2X protection level further enhances the safety and durability of the equipment.

[0029] Preferably, in the present invention, the partition is made of a metal plate that meets the IP2X protection level, further emphasizing the safety and protection level of the equipment; the IP2X level means that objects with larger diameters can be prevented from entering, which helps prevent electric shock accidents and intrusion of foreign objects.

[0030] Preferably, in the present utility model, temperature sensors are arranged in each key chamber, which can monitor the indoor temperature in real time and provide data support for the intelligent control of the heat dissipation system; this is of great significance for timely discovering and handling overheating problems and preventing equipment damage.

[0031] Preferably, in the present utility model, through the electrical connection of the controller with the temperature sensors, the air supply fan, and the exhaust fan, the intelligent control of the heat dissipation system is realized. The controller can automatically adjust the operating states of the air supply fan and the exhaust fan according to the data of the temperature sensors to achieve the best heat dissipation effect, improving the automation degree and energy conservation of the system.

[0032] Preferably, in the present utility model, both the air inlet and the air outlet are communicated with the atmosphere, ensuring that the heat dissipation system can continuously and effectively discharge the heat outside the cabinet, avoiding the accumulation and circulation of heat inside the cabinet and ensuring the heat dissipation effect.

[0033] Preferably, in the present utility model, the centers of the air inlet and the air outlet are located on the same horizontal line. Such a design helps to form a uniform and stable air flow, reducing the occurrence of eddy currents and turbulent flows, and further improving the heat dissipation efficiency. At the same time, this layout is also beneficial to reducing the noise and vibration of air flow. Description of the Drawings

[0034] Figure 1 It is a schematic structural diagram of a switch cabinet heat dissipation system provided by an embodiment of the present utility model;

[0035] Figure 2 It is a control principle diagram of a controller of a switch cabinet heat dissipation system provided by an embodiment of the present utility model;

[0036] Figure 3 It is a temperature control flowchart of a switch cabinet heat dissipation system provided by an embodiment of the present utility model.

[0037] Reference Numerals:

[0038] 1 - Instrument Chamber, 2 - Circuit Breaker Chamber, 3 - Busbar Chamber, 4 - Cable Chamber, 5 - First Temperature Sensor, 6 - Second Temperature Sensor, 7 - Third Temperature Sensor, 8 - 1 - Air Supply Fan, 8 - 2 - Exhaust Fan, 9 - Controller, 10 - Maintenance Chamber. Detailed Embodiments

[0039] In order to make the technical problems, technical solutions and beneficial effects solved by the present utility model clearer, the following specific embodiments are used to further elaborate on the present utility model in detail. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. Components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0041] Therefore, the detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0042] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0043] In the description of the embodiments of the present utility model, it should be noted that if terms such as "upper", "lower", "horizontal", "inner", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, it is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, terms such as "first", "second", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0044] In addition, if the term "horizontal" appears, it does not mean that the component is required to be absolutely horizontal, but it can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but it can be slightly inclined.

[0045] In the description of the embodiments of the present utility model, it should also be noted that unless otherwise clearly specified and defined, if terms such as "set", "installed", "connected", "connected" are understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0046] The following further describes the present utility model in detail with reference to the accompanying drawings:

[0047] Example 1

[0048] As mentioned in the background technology, at present, the existing switch cabinet heat dissipation system takes in air from the front lower side of the switch cabinet, passes through the circuit breaker room and the cable room respectively, and is divided into two flow directions, and finally flows out from the circuit breaker room and the top of the busbar room located above the cable room. Although it can effectively dissipate heat in the cabinet; however, the double-flow channel design has certain limitations, which are specifically manifested in: first, due to the large number of component rooms that need to be cooled, the double-flow channel design is adopted, resulting in most of the airflow passing through one side of the circuit breaker room; while a small part of the airflow passes through the cable room and the busbar room; this will lead to the heat dissipation effect on one side of the cable room and the busbar room, especially the problem of uneven and insufficient heat dissipation; once the heat dissipation performance cannot be guaranteed, it greatly affects the working performance of the switch electrical components, and even affects the service life of the switch electrical components; second, since the air inlet of the existing heat dissipation system is designed at the front lower side of the cabinet, when the switch cabinet discharges, the arc is easy to spray out from the air inlet on the front lower side of the cabinet, causing harm to the maintenance personnel, and there are certain safety hazards. The air enters from the lower front side of the switch cabinet, passes through the circuit breaker room and the cable room, and is divided into two directions, and finally flows out from the circuit breaker room and the top of the busbar room above the cable room. Although it can effectively dissipate heat in the cabinet, the double-channel design has certain limitations, which are as follows: First, since there are many component rooms that need to be cooled, the double-channel design causes most of the airflow to pass through one side of the circuit breaker room, while a small part of the airflow passes through the cable room and the busbar room. This will lead to the heat dissipation effect on one side of the cable room and the busbar room, especially the problem of uneven and insufficient heat dissipation. Once the heat dissipation performance cannot be guaranteed, it will greatly affect the working performance of the switch electrical components and even affect the service life of the switch electrical components. Second, since the air inlet of the existing heat dissipation system is designed on the lower front side of the cabinet, when the switch cabinet discharges, the arc is likely to be ejected from the air inlet on the lower front side of the cabinet, causing harm to maintenance personnel, and posing certain safety hazards.

[0049] In order to solve the above problems, the present embodiment provides a switch cabinet heat dissipation system, which optimizes and improves the traditional two-way heat dissipation channel design into a single channel, ensuring that each component room can fully dissipate heat, ensuring the working performance of the switch electrical components, and improving the service life of the switch electrical components.

[0050] like Figure 1As shown in the figure, this embodiment provides a switch cabinet heat dissipation system, including an air inlet and an air outlet; wherein, both the air inlet and the air outlet are opened at the top of the cabinet body of the switch cabinet; compared with the traditional design of opening on the side wall of the cabinet body, the top design improves the safety of operators. The reason is that in the existing switch cabinet, air enters from the lower front side of the cabinet, is divided into two flow directions after passing through the circuit breaker chamber 2 and the cable chamber 4 respectively, and finally flows out from the top of the circuit breaker chamber 2 and the bus chamber 3; when a discharge phenomenon occurs in the switch cabinet, the electric arc will spray out from the air inlet at the lower front side of the cabinet, hurting the maintenance personnel in front of the cabinet; in this embodiment, the air inlet and the air outlet are respectively arranged at the top of the cabinet body, preventing the occurrence of the above problems.

[0051] As Figure 1 shown, in this embodiment, on one side of the cabinet body, that is, the front side of the cabinet body ( Figure 1 the left side in Figure 1 ), below the air inlet are successively the circuit breaker chamber 2 and the maintenance chamber 10 to form the first heat dissipation flow path; on the other side of the cabinet body, that is, the rear side of the cabinet body ( Figure 1 the right side in

[0052] ), below the air outlet are successively connected to the bus chamber 3 and the cable chamber 4 to form the second heat dissipation flow path; wherein, a channel hole is opened between the maintenance chamber 10 and the cable chamber 4 to connect the two, so as to realize that the first heat dissipation flow path and the second heat dissipation flow path are conducted, and a complete heat dissipation channel is formed from the air inlet to the air outlet.

[0052] In this embodiment, the improved switch cabinet heat dissipation flow path is designed. Compared with the design of the existing heat dissipation system, there is only one air duct flow direction, which ensures that each switch electrical component of the switch cabinet has sufficient air duct flow rate and ensures the sufficient heat dissipation of the heating components.

[0053] Again, as Figure 1 shown, in this embodiment, a blower 8-1 is arranged at the air inlet and an exhaust fan 8-2 is arranged at the air outlet, which can forcibly form air flow and further enhance the heat dissipation effect; wherein, both the air inlet and the air outlet are communicated with the atmosphere; and the centers of the air inlet and the air outlet are on the same horizontal line

[0054] Here, the blower 8-1 provides positive pressure to accelerate the air entering the switch cabinet; the exhaust fan 8-2 forms negative pressure to quickly extract the hot air. The two work together to significantly improve the efficiency and effect of the heat dissipation system.

[0055] For better heat dissipation effect, in this embodiment, the air inlet is vertically opened directly above the circuit breaker chamber 2; and the geometric centers of each section of the first-stage heat dissipation flow path are located on the same straight line, that is, from the air inlet to the circuit breaker chamber 2 is one section of the flow path; from the circuit breaker chamber 2 to the maintenance chamber 10 is another section of the flow path, and the geometric centers of the two sections of the flow path are located on the same straight line; similarly, the air outlet is vertically opened directly above the busbar chamber 3; the geometric centers of each section of the second-stage heat dissipation flow path are located on the same straight line; that is, the geometric centers of each section of the flow path between the air outlet and the busbar chamber 3 and between the busbar chamber 3 and the cable chamber 4 are located on the same straight line.

[0056] In this embodiment, partitions are provided between the circuit breaker chamber 2 and the maintenance chamber 10, between the busbar chamber 3 and the cable chamber 4, and between the maintenance chamber 10 and the cable chamber 4. The partitions are preferably made of metal plates meeting the IP2X protection grade; the partitions are provided with ventilation holes for air flow to pass through.

[0057] Embodiment 2

[0058] This embodiment provides another switchgear heat dissipation system, whose basic structure is the same as that of Embodiment 1, and it is optimized and improved on the basis of Embodiment 1. Specifically, it includes:

[0059] Temperature sensors are arranged in the circuit breaker chamber 2, the busbar chamber 3, and the cable chamber 4. Specifically, a first temperature sensor 5 is arranged in the circuit breaker chamber 2, a second temperature sensor 6 is arranged in the busbar chamber 3, and a third temperature sensor 7 is arranged in the cable chamber 4 for monitoring the temperature of each chamber; more specifically, the static contacts, cable joints, and busbar joints inside the cabinet are monitored

[0060] In order to facilitate the effective control of the air supply fan 8-1 and the exhaust fan 8-2, a controller 9 electrically connected to the air supply fan 8-1, the exhaust fan 8-2, the first temperature sensor 5, the second temperature sensor 6, and the third temperature sensor 7 is also arranged in the instrument chamber 1 in this embodiment.

[0061] As Figure 2 and Figure 3 shown, in this embodiment, when the temperature sensor detects that the temperature rise is greater than or equal to 40K, the controller 9 controls the fans (the air supply fan 8-1 and the exhaust fan 8-2) to start, and the circulating air cooling mode is turned on to reduce the temperature inside the cabinet. When the temperature rise at the temperature sensor inside the cabinet is less than or equal to 20K, the fans stop running.

[0062] As can be seen, this embodiment provides a heat dissipation system for switchgear, realizing the design of a self-circulating air duct for the switchgear: the air flow in the entire air duct is driven by a fan. The incoming air is drawn in by a vertically-mounted fan installed at the top of the circuit breaker compartment. The air enters the cable compartment from the lower part of the circuit breaker compartment, and the outgoing air is extracted by a vertically-mounted fan installed at the top of the busbar compartment. A ventilation hole metal plate meeting the IP2X protection level is installed between the circuit breaker compartment, the cable compartment, and the busbar compartment, ensuring that the air flow in the air duct enters from the circuit breaker compartment of the switchgear, passes through the cable compartment, enters the busbar compartment, and finally is extracted from the top of the busbar compartment. The air flow in each high-voltage compartment takes away the heat on the heated live parts, reducing the temperature of the heated live parts; at the same time, it solves the problem of the arc spraying out from the front and rear doors of the cabinet after an internal fault arc occurs due to the opening of the incoming air holes at the lower part of the front and rear doors.

[0063] The above embodiment is only one of the implementation manners capable of realizing the technical solution of the present invention. The scope of protection required by the present invention is not only limited by this embodiment, but also includes any changes, substitutions, and other implementation manners that are easily conceivable by any person skilled in the art within the technical scope disclosed by the present invention.

Claims

1. A switch cabinet heat dissipation system, characterized in that: Including air inlet and air outlet opened on the top of the cabinet; Located on one side of the cabinet, the air inlet is connected to the circuit breaker room (2) and the maintenance room (10) in sequence to form a first section of heat dissipation flow channel; Located on the other side of the cabinet, the exhaust port is connected with the busbar chamber (3) and the cable chamber (4) in sequence to form a second heat dissipation channel; The inspection room (10) is in communication with the cable room (4), thereby achieving conduction between the first section of the heat dissipation flow channel and the second section of the heat dissipation flow channel.

2. A switch cabinet heat dissipation system according to claim 1, characterized in that: The air inlet is provided with an air supply fan (8-1); the air outlet is provided with an exhaust fan (8-2).

3. A switch cabinet heat dissipation system according to claim 1, characterized in that: The air inlet is vertically opened directly above the circuit breaker chamber (2); the geometric center of each section of the first heat dissipation flow channel is located on the same straight line.

4. A switch cabinet heat dissipation system according to claim 1, characterized in that: The exhaust port is vertically opened directly above the busbar chamber (3); the geometric center of each section of the second heat dissipation flow channel is located on the same straight line.

5. A switch cabinet heat dissipation system according to claim 1, characterized in that: Partitions are provided between the circuit breaker chamber (2) and the maintenance chamber (10), between the busbar chamber (3) and the cable chamber (4), and between the maintenance chamber (10) and the cable chamber (4), and the partitions are provided with ventilation holes for airflow to pass through.

6. A switch cabinet heat dissipation system according to claim 5, characterized in that: The partition is made of a metal plate that meets the IP2X protection level.

7. A switch cabinet heat dissipation system according to claim 1, characterized in that: Temperature sensors are provided in the circuit breaker chamber (2), the busbar chamber (3) and the cable chamber (4).

8. A switch cabinet heat dissipation system according to claim 7, characterized in that: A controller (9) is arranged in the instrument room (1), and the controller (9) is electrically connected to each of the temperature sensors; The air inlet is provided with an air supply fan (8-1); the air outlet is provided with an exhaust fan (8-2); The controller (9) is electrically connected to the air supply fan (8-1) and the air exhaust fan (8-2) respectively.

9. A switch cabinet heat dissipation system according to claim 1, characterized in that: The air inlet and the air outlet are both connected to the atmosphere.

10. A switch cabinet heat dissipation system according to claim 1, characterized in that: The centers of the air inlet and the air outlet are located on the same horizontal line.

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