Ventilation system of power distribution cabinet

Abstract

The utility model provides a ventilation system of a power distribution cabinet, and belongs to the technical field of power distribution cabinets. Comprising a power distribution cabinet body; the fan is arranged at the top of the power distribution cabinet body; the plurality of air outlet valves are arranged on the power distribution cabinet body in a communicating manner; the air inlet is arranged on the power distribution cabinet body in a communicating manner; the expansion and contraction air duct is arranged on the air inlet in a communicating mode and located on the power distribution cabinet body, and the expansion and contraction air duct comprises a stabilizing part which is arranged in the power distribution cabinet body and used for stabilizing airflow; the stable part is in an upward inclined shape; and the contraction part is arranged on the stabilizing part in a communicating manner and is used for accelerating airflow. According to the utility model, the fan and the expansion and contraction air channel are arranged, so that forced air cooling heat dissipation of the power distribution cabinet is realized, the heat dissipation speed of the power distribution cabinet is accelerated, the expansion and contraction air channel divides external cooling airflow into two parts, one part is located in the cabinet, the other part is directly led to a heating element, the heat dissipation efficiency is effectively improved, and local overheating is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of power distribution cabinets, in particular to a ventilation system for a power distribution cabinet. Background Art

[0002] The distribution cabinet is divided into power distribution cabinet, lighting distribution cabinet and metering cabinet, which is the final equipment of the power distribution system. The distribution cabinet is a general term for the motor control center. The distribution cabinet is suitable for occasions with relatively dispersed loads and fewer circuits; the motor control center is used for occasions with concentrated loads and more circuits. They distribute the power of a circuit of the upper-level distribution equipment to the nearest load. This level of equipment should provide protection, monitoring and control for the load. In factories in the chemical, mechanical, electronic manufacturing and other industries, the distribution cabinet is often in a high temperature, dusty or humid environment.

[0003] At present, the existing distribution cabinets work in a high-temperature environment. The temperature of the distribution cabinets rises, causing the internal components of the distribution cabinets to heat up, which will produce a higher heat density. The conventional natural convection heat dissipation inside the distribution cabinets is difficult to meet the heat dissipation requirements. The temperature inside the cabinet will rise rapidly, exceeding the normal working range, causing overheating of components and affecting the performance of electrical components. Therefore, the present application provides a distribution cabinet ventilation system to meet the needs. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a distribution cabinet ventilation system to solve the problem that the conventional natural convection heat dissipation inside the distribution cabinet is difficult to meet the heat dissipation demand when the existing distribution cabinet works in a high temperature environment.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A ventilation system for a power distribution cabinet comprises: a power distribution cabinet body; a fan arranged on the top of the power distribution cabinet body; a plurality of air outlet valves arranged on the power distribution cabinet body in communication; an air inlet arranged on the power distribution cabinet body in communication; an expansion and contraction air duct arranged on the air inlet in communication and located on the power distribution cabinet body, the expansion and contraction air duct comprising: a stabilizing portion arranged in the power distribution cabinet body for stabilizing the airflow; and the stabilizing portion is inclined upward; a contraction portion arranged on the stabilizing portion in communication for accelerating the airflow; a diverter plate arranged in the contraction portion, one side of the diverter plate passing through the contraction portion; a semicircular block arranged on the diverter plate; a concentrating plate arranged on the contraction portion and forming a channel corresponding to the diverter plate.

[0007] It also includes: the air outlet valve and the air inlet are distributed up and down.

[0008] It also includes: a plurality of small protruding blocks are arranged on the semicircular block.

[0009] It also includes: an expansion portion, which is arranged on the stable portion and is connected to the air inlet; and a flow disturbance plate, which is arranged in the stable portion.

[0010] It also includes: the spoiler can be configured as a porous plate or an airfoil plate.

[0011] It also includes: an installation frame, which is arranged in the main body of the power distribution cabinet and is hollow; a component body, which is arranged in the installation frame; a heat conduction plate, which is arranged in the installation frame and connected to the component body, and the heat conduction plate is inclined upward.

[0012] It also includes: a protection frame, which is arranged on the top of the power distribution cabinet body, and the fan is located in the protection frame; and an electric blocking plate, which is arranged in the protection frame and is used to open or close the protection frame.

[0013] Compared with the prior art, the utility model has at least the following beneficial effects:

[0014] In the above scheme, by setting fans and expansion and contraction air ducts, the distribution cabinet is forced to dissipate heat through air cooling, which accelerates the heat dissipation speed of the distribution cabinet. The expansion and contraction air duct divides the external cooling airflow into two parts, one part is located in the cabinet, and the other part is directly led to the heating element, which effectively improves the heat dissipation efficiency and prevents local overheating. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable those skilled in the relevant art to make and use the present disclosure.

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of the ventilation system of the power distribution cabinet;

[0017] Figure 2 It is a top view of the electric blocking plate structure;

[0018] Figure 3 This is a cross-sectional view of the main structure of the power distribution cabinet;

[0019] Figure 4 It is a cross-sectional view of the expansion and contraction air duct structure.

[0020] [reference numerals]

[0021] 1. Distribution cabinet body; 2. Air outlet valve; 3. Protection frame; 4. Electric blocking plate; 5. Air inlet; 6. Fan; 7. Component body; 8. Expansion and contraction air duct; 9. Installation frame; 10. Heat conduction plate; 81. Expansion part; 82. Stabilization part; 83. Contraction part; 84. Semicircular block; 85. Concentration plate; 86. Diverter plate; 87. Spoiler.

[0022] As shown in the figure, in order to clearly implement the structure of the embodiment of the utility model, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the utility model to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0023] The following is a detailed description of a power distribution cabinet ventilation system provided by the utility model in combination with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments, and are not intended to specifically limit the utility model.

[0024] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, an embodiment of the utility model provides a ventilation system for a distribution cabinet, comprising: a distribution cabinet body 1; a fan 6, arranged on the top of the distribution cabinet body 1; a plurality of air outlet valves 2, connected and arranged on the distribution cabinet body 1; an air inlet 5, connected and arranged on the distribution cabinet body 1; an expansion and contraction air duct 8, connected and arranged on the air inlet 5, and located on the distribution cabinet body 1, the expansion and contraction air duct 8 comprises: a stabilizing portion 82, arranged in the distribution cabinet body 1, for stabilizing the airflow; and the stabilizing portion 82 is inclined upward; a contraction portion 83, connected and arranged on the stabilizing portion 82, for accelerating the airflow; a diverter plate 86, arranged in the contraction portion 83, one side of the diverter plate 86 passes through the contraction portion 83; a semicircular block 84, arranged on the diverter plate 86; a concentrating plate 85, arranged on the contraction portion 83, and forming a channel corresponding to the diverter plate 86.

[0025] By setting the diverter plate 86, the contraction part 83 is divided into two channels, namely the first channel and the second channel, and the airflow is formed into two parts. The first part of the airflow passes through the first channel, which causes the airflow to disperse after hitting the semicircular block 84, forming multi-directional micro-vortices, which can increase the mixing of the airflow and the air inside the distribution cabinet body 1, increase the heat dissipation area, and make the temperature in the whole cabinet more uniform; the other part of the airflow passes through the second channel, ensuring that the airflow can be directly blown to the heating element in a higher speed and concentrated manner, thereby improving the heat exchange efficiency.

[0026] like Figure 1 and Figure 2As shown, it also includes: the air outlet valve 2 and the air inlet 5 are distributed up and down. Since the density of hot air is less than that of cold air, hot air will naturally rise. Setting the air inlet 5 at the top can utilize this physical principle to help hot air be discharged from the cabinet more effectively.

[0027] like Figure 4 As shown, it also includes: a plurality of small protrusions are arranged on the semicircular block 84. By arranging a plurality of small protrusions, the contact surface when the airflow passes through is increased, so that the airflow is caused to have more complex disturbances after hitting the semicircular block 84, and more tiny vortices are formed. These vortices help the air to mix more fully with the hot air inside the power distribution cabinet body 1, thereby improving the heat dissipation efficiency. The small protrusions can be arranged in a staggered or spiral arrangement.

[0028] like Figure 4 As shown, it also includes: an expansion portion 81, which is connected to the stable portion 82 and is connected to the air inlet 5; and a flow disturbance plate 87, which is arranged in the stable portion 82. The stable portion 82 further stabilizes the airflow to ensure uniform distribution of the airflow, preparing for the subsequent airflow control and guidance.

[0029] like Figure 4 As shown, the spoiler 87 may be provided as a porous plate or an airfoil plate. By providing the spoiler 87, the front curvature of the airfoil plate may be smooth, and the back may be slightly curved, so that the airflow can be effectively guided, the resistance can be reduced, and the laminar flow of the airflow can be promoted, and the formation of vortices can be reduced; the holes of the porous plate may be arranged in a staggered or irregular manner, so as to evenly disperse the airflow, so that the turbulence of the airflow can be reduced in the stable portion 82.

[0030] like Figure 2 As shown, it also includes: an installation frame 9, which is arranged in the distribution cabinet body 1 and is hollow; a component body 7, which is arranged in the installation frame 9; a heat conducting plate 10, which is arranged in the installation frame 9 and connected to the component body 7, and the heat conducting plate 10 is inclined upward.

[0031] like Figure 1 , Figure 2 and Figure 3 As shown, it also includes: a protection frame 3, which is arranged on the top of the distribution cabinet body 1, and the fan 6 is located in the protection frame 3; an electric blocking plate 4, which is arranged in the protection frame 3 and is used to open or close the protection frame 3.

[0032] By setting the electric blocking plate 4, it can be divided into an electric part and a blocking part. The electric part can be provided with a cylinder or an electric telescopic rod, and the blocking part can be provided with a blocking plate. The blocking plate is driven by the electric part to extend and retract, thereby opening or closing the protection frame 3.

[0033] The utility model provides a technical solution. When the power distribution cabinet body 1 is operating normally, the external air enters the expansion and contraction air duct 8 through the air inlet 5. The airflow first passes through the expansion part 81 to slow down the airflow speed and increase the air volume, and then enters the stable part 82. With the cooperation of the spoiler 87, the airflow direction is adjusted to reduce turbulence. The airflow then enters the contraction part 83, and the airflow is divided into two parts by the splitter 86. One part of the airflow passes through the first channel, collides with the semicircular block 84, and then disperses into the power distribution cabinet body 1. The other part of the airflow passes through the second channel and blows toward the heating element. The heat generated by the element body 7 when working is discharged upward through the heat conduction plate 10, and the heat in the power distribution cabinet body 1 is discharged outward through the air outlet valve 2. When the internal temperature of the power distribution cabinet body 1 is too high, the electric blocking plate 4 and the fan 6 are turned on by the external controller, the electric blocking plate 4 opens the protective frame 3, and then the internal heat of the power distribution cabinet body 1 is sucked out upward by the fan 6, and the expansion and contraction air duct 8 flows the external air into the cabinet to accelerate the cooling of the power distribution cabinet body 1.

[0034] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the above preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0035] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A ventilation system for a power distribution cabinet, characterized in that: include: Distribution cabinet body (1); A fan (6) is arranged on the top of the power distribution cabinet body (1); A plurality of air outlet valves (2) are connected and arranged on the power distribution cabinet body (1); An air inlet (5) is arranged in communication with the power distribution cabinet body (1); The expansion and contraction air duct (8) is arranged in communication with the air inlet (5) and is located on the power distribution cabinet body (1), and the expansion and contraction air duct (8) comprises: A stabilizing portion (82) is arranged in the power distribution cabinet body (1) and is used to stabilize the airflow; The stable portion (82) is inclined upward; A contraction portion (83) is arranged in communication with the stable portion (82) and is used to accelerate airflow; A splitter plate (86) is disposed in the contraction portion (83), and one side of the splitter plate (86) passes through the contraction portion (83); A semicircular block (84) is arranged on the diverter plate (86); The concentrating plate (85) is arranged on the contraction portion (83) and forms a channel corresponding to the flow dividing plate (86).

2. The power distribution cabinet ventilation system according to claim 1, characterized in that: Also includes: The air outlet valve (2) and the air inlet (5) are distributed vertically.

3. The ventilation system for a power distribution cabinet according to claim 1, characterized in that: Also includes: A plurality of small protruding blocks are arranged on the semicircular block (84).

4. The ventilation system for a power distribution cabinet according to claim 1, characterized in that: Also includes: An expansion portion (81) is disposed on the stable portion (82) and is in communication with the air inlet (5); If a flow disturbance plate (87) is provided, it is arranged in the stable portion (82).

5. The ventilation system for the power distribution cabinet according to claim 4, characterized in that: Also includes: The spoiler (87) may be provided in the form of a porous plate or an airfoil plate.

6. The ventilation system for a power distribution cabinet according to claim 1, characterized in that: Also includes: An installation frame (9) is arranged in the power distribution cabinet body (1), and the installation frame (9) is hollow; A component body (7) is arranged in the installation frame (9); A heat conducting plate (10) is arranged in the installation frame (9) and connected to the element body (7); the heat conducting plate (10) is inclined upward.

7. The ventilation system for a power distribution cabinet according to claim 1, characterized in that: Also includes: A protection frame (3) is arranged on the top of the power distribution cabinet body (1), and the fan (6) is located in the protection frame (3); An electric blocking plate (4) is arranged in the protection frame (3) and is used to open or close the protection frame (3).

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