Ventilation device for frequency converter cabinet

Abstract

The utility model provides a ventilation device for a frequency converter cabinet, which relates to the field of frequency converter cabinet equipment and comprises a cabinet body, a plurality of frequency conversion controllers are fixedly arranged in the cabinet body, a plurality of flow guide mechanisms are fixedly arranged on one side in the cabinet body, and a ventilation assembly rotates to suck air outside the cabinet body into the cabinet body. Meanwhile, the ventilation assembly conveys air with heat to the conical groove of the cabinet body, the air with the heat is conveyed to the air inlet of the arc-shaped frame through the conical groove, and when the air with the heat moves in the conical groove, the flowing space in the conical groove is gradually reduced; when the air with heat in the conical groove enters the air inlet of the annular frame and begins to flow towards the air outlet of the annular frame, the flowing space in the annular frame is gradually enlarged, so that the annular frame can discharge more air at the same time; and after the speed is increased, the air with heat is quickly discharged out of the cabinet body.

Description

Technical Field

[0001] The utility model relates to the field of frequency converter cabinet equipment, in particular to a ventilation device used for a frequency converter cabinet. Background Art

[0002] The inverter cabinet, also known as the inverter control cabinet or electrical control cabinet, is an important electrical equipment, widely used in metallurgy, chemical industry, petroleum, water supply, mining, building materials, motor industry and other fields. It is used to control various medium-voltage motor equipment. When the inverter cabinet is running, it will generate a lot of heat. When too much heat accumulates inside the inverter cabinet, it will cause the inverter cabinet to shut down. The merchant installs a ventilation device inside the inverter cabinet to transport the heat inside the inverter cabinet out of the inverter cabinet through the ventilation device to reduce the heat in the inverter cabinet.

[0003] The ventilation device is basically composed of a cooling fan. The cooling air supply is installed inside the inverter cabinet. Air inlets and air outlets are respectively provided on both sides of the inverter cabinet. The cooling fan draws air from outside the inverter cabinet through the air inlet and conveys the hot air inside the inverter cabinet out from the air outlet. However, in some emergency situations, the inverter cabinet will be overloaded to cope with the emergency. At this time, the inverter cabinet will generate a lot of heat, and the heat dissipation efficiency of its cooling fan can no longer meet its requirements, which can easily lead to the inverter cabinet shutting down.

[0004] Therefore, it is necessary to provide a new ventilation device for a frequency converter cabinet to solve the above technical problems. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a ventilation device for a frequency converter cabinet.

[0006] The utility model provides a ventilation device for a frequency converter cabinet, comprising a cabinet body, a plurality of frequency converter controllers are fixedly arranged inside the cabinet body, and a plurality of flow guide mechanisms are fixedly arranged on one side inside the cabinet body;

[0007] The air guide mechanism includes an air supply component, one side of the air supply component is fixedly connected to the inner side of the cabinet, a conical groove is provided on the inner side of the cabinet away from the air supply component, the cross-section of the conical groove adjacent to the air supply component is larger than the cross-section of the conical groove away from the air supply component, an annular frame is fixedly provided on one side of the outer surface of the cabinet, an air inlet and an air outlet are respectively provided on both sides of the annular frame, and the pipe diameter of the air inlet of the annular frame is smaller than the pipe diameter of the air outlet of the annular frame.

[0008] Preferably, a plurality of guide blocks are respectively provided inside the side of the annular frame away from the cabinet body, and the opposite sides of the plurality of guide blocks are respectively fixedly connected to the inner surface of the annular frame.

[0009] Preferably, the air supply assembly includes a cooling fan, a circular groove is provided inside the cabinet on a side away from the conical groove, the cooling fan is movably arranged inside the circular groove, and the outer surface of the cooling fan is fixedly connected to the inner surface of the circular groove.

[0010] Preferably, a protection frame is provided on the side of the heat dissipation fan away from the filter screen, and the outer surface of the protection frame is fixedly connected to the inner surface of the circular groove.

[0011] Preferably, a power assembly is provided between the protective frame and the cooling fan, the output end of the power assembly extends into the cooling fan and is fixedly connected to the cooling fan, and the power assembly extends into the protective frame away from the cooling fan and is fixedly connected to the protective frame.

[0012] Preferably, the power assembly includes a motor, which is arranged between the protective frame and the cooling fan, the motor output end extends into the interior of the cooling fan, the outer surface of the motor output end is fixedly connected to the interior of the cooling fan, the motor extends out of the protective frame away from the cooling fan, and the outer surface of the motor is fixedly connected to the inner surface of the protective frame.

[0013] Compared with the related art, the ventilation device for the frequency converter cabinet provided by the utility model has the following beneficial effects:

[0014] The ventilation component rotates to draw air from outside the cabinet into the cabinet. At the same time, the ventilation component transports hot air to the conical groove of the cabinet, and transports the hot air to the air inlet of the arc frame through the conical groove. When the hot air moves inside the conical groove, the flow space inside the conical groove gradually shrinks, so that the flow speed of the hot air inside the conical groove gradually increases. When the hot air inside the conical groove enters the air inlet of the annular frame and begins to flow toward the air outlet of the annular frame, the flow space inside the annular frame gradually expands, so that the annular frame can discharge more air at the same time, so that the hot air with increased speed is quickly discharged from the cabinet. This structure improves the heat dissipation efficiency of the cabinet to a certain extent, and reduces the probability of shutdown when the inverter cabinet is overloaded to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of a ventilation device for a frequency converter cabinet provided by the utility model;

[0016] Figure 2 for Figure 1 The local structure schematic diagram shown;

[0017] Figure 3 for Figure 2 The structural schematic diagram of the guide mechanism shown;

[0018] Figure 4 for Figure 2 The structure of the air supply assembly shown Figure 1 ;

[0019] Figure 5 for Figure 2 The structure of the air supply assembly shown Figure 2 .

[0020] Numbers in the figure: 1, cabinet; 2, frequency conversion controller; 3, conical groove; 4, ring frame; 5, cooling fan; 6, circular groove; 7, guide block; 8, protective frame; 9, motor. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0022] Please refer to Figure 1-Figure 5 ,in, Figure 1 This is a schematic diagram of the overall structure of a ventilation device for a frequency converter cabinet provided by the utility model; Figure 2 for Figure 1 The local structure schematic diagram shown; Figure 3 for Figure 2 The structural schematic diagram of the guide mechanism shown; Figure 4 for Figure 2 The structure of the air supply assembly shown Figure 1 ; Figure 5 for Figure 2 The structure of the air supply assembly shown Figure 2 .

[0023] In the specific implementation process, Figure 1-Figure 5A ventilation device for a frequency converter cabinet includes a cabinet 1, a plurality of frequency converter controllers 2 are fixedly arranged inside the cabinet 1, a plurality of air guide mechanisms are fixedly arranged on one side of the cabinet 1, the air guide mechanism includes an air supply component, one side of the air supply component is fixedly connected to one side of the cabinet 1, a conical groove 3 is provided on the side of the cabinet 1 away from the air supply component, the cross section of the conical groove 3 on the side close to the air supply component is larger than the cross section of the side of the conical groove 3 away from the air supply component, an annular frame 4 is fixedly arranged on one side of the outer surface of the cabinet 1, an air inlet and an air outlet are respectively arranged on both sides of the annular frame 4, the diameter of the air inlet of the annular frame 4 is smaller than the diameter of the air outlet of the annular frame 4, and the annular frame 4 is provided with a plurality of air guide mechanisms. A plurality of guide blocks 7 are respectively arranged inside the side of the frame 4 away from the cabinet 1, and the opposite sides of the plurality of guide blocks 7 are respectively fixedly connected to the inner surface of the annular frame 4, the air supply component includes a cooling fan 5, a circular groove 6 is opened inside the cabinet 1 on the side away from the conical groove 3, the cooling fan 5 is movably arranged inside the circular groove 6, the outer surface of the cooling fan 5 is fixedly connected to the inner surface of the circular groove 6, a protective frame 8 is arranged on the side of the cooling fan 5 away from the filter, the outer surface of the protective frame 8 is fixedly connected to the inner surface of the circular groove 6, a power component is arranged between the protective frame 8 and the cooling fan 5, and the output end of the power component extends to the inside of the cooling fan 5 and is fixedly connected to the cooling fan 5 The power assembly extends to the inside of the protection frame 8 away from the side of the cooling fan 5 and is fixedly connected to the protection frame 8. The power assembly includes a motor 9, which is arranged between the protection frame 8 and the cooling fan 5. The output end of the motor 9 extends to the inside of the cooling fan 5. The outer surface of the output end of the motor 9 is fixedly connected to the inside of the cooling fan 5. The motor 9 extends out of the protection frame 8 away from the side of the cooling fan 5. The outer surface of the motor 9 is fixedly connected to the inner surface of the protection frame 8. The protection frame 8 protects the cooling fan 5 and prevents debris from entering the circular groove 6 of the cabinet 1 to avoid damage to the cooling fan 5. The annular frame 4 is a plurality of cone-shaped The frame is composed of a structure, through which the hot air can maintain a stable state when flowing inside the annular frame 4, avoiding the formation of vortex in the annular frame 4. The cooling fan 5 rotates to draw the air outside the cabinet 1 into the cabinet 1. At the same time, the cooling fan 5 transports the hot air to the conical groove 3 of the cabinet 1, and transports the hot air to the air inlet of the arc frame through the conical groove 3. When the hot air moves inside the conical groove 3, the flow space inside the conical groove 3 gradually shrinks, so that the flow speed of the hot air inside the conical groove 3 gradually increases.

[0024] The working principle provided by the utility model is as follows: the cooling fan 5 rotates to draw the air outside the cabinet 1 into the cabinet 1, and at the same time the cooling fan 5 delivers the air with heat to the conical groove 3 of the cabinet 1, and delivers the air with heat to the air inlet of the arc frame through the conical groove 3. When the air with heat moves inside the conical groove 3, the flow space inside the conical groove 3 gradually shrinks, so that the flow speed of the air with heat inside the conical groove 3 gradually increases. When the air with heat inside the conical groove 3 enters the air inlet of the annular frame 4 and starts to flow toward the air outlet of the annular frame 4, Because the flow space inside the annular frame 4 gradually expands, the annular frame 4 can discharge more air at the same time, and the hot air with its speed increased is quickly discharged from the cabinet 1. When the hot air is about to be discharged from the annular frame 4, when the air passes through multiple diversion blocks, the multiple diversion blocks will divide the hot air into multiple airflows. By dividing the hot air into multiple airflows and discharging them out of the annular frame 4, it can be avoided to a certain extent that the hot air will not form vortices at its outlet when it is discharged from the annular frame 4, thereby avoiding adverse effects on the heat dissipation of the variable frequency drive inside the cabinet 1.

[0025] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0026] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A ventilation device for a frequency converter cabinet, characterized in that: It comprises a cabinet (1), wherein a plurality of frequency conversion controllers (2) are fixedly arranged inside the cabinet (1), and a plurality of flow guide mechanisms are fixedly arranged on one side inside the cabinet (1); The air guide mechanism comprises an air supply component, one side of the air supply component is fixedly connected to the inner side of the cabinet (1), a conical groove (3) is provided on the inner side of the cabinet (1) away from the air supply component, the cross section of the conical groove (3) on the side adjacent to the air supply component is larger than the cross section of the conical groove (3) on the side away from the air supply component, an annular frame (4) is fixedly provided on the outer surface of the cabinet (1), an air inlet and an air outlet are respectively provided on both sides of the annular frame (4), and the pipe diameter of the air inlet of the annular frame (4) is smaller than the pipe diameter of the air outlet of the annular frame (4).

2. The ventilation device for a frequency converter cabinet according to claim 1, characterized in that: A plurality of guide blocks (7) are respectively arranged inside the side of the annular frame (4) away from the cabinet (1), and the opposite sides of the plurality of guide blocks (7) are respectively fixedly connected to the inner surface of the annular frame (4).

3. The ventilation device for a frequency converter cabinet according to claim 2, characterized in that: The air supply assembly comprises a cooling fan (5); a circular groove (6) is provided inside the cabinet (1) on a side away from the conical groove (3); the cooling fan (5) is movably arranged inside the circular groove (6); and the outer surface of the cooling fan (5) is fixedly connected to the inner surface of the circular groove (6).

4. The ventilation device for a frequency converter cabinet according to claim 3, characterized in that: A protective frame (8) is provided on the side of the heat dissipation fan (5) away from the filter screen, and the outer surface of the protective frame (8) is fixedly connected to the inner surface of the circular groove (6).

5. The ventilation device for a frequency converter cabinet according to claim 4, characterized in that: A power assembly is provided between the protection frame (8) and the cooling fan (5); an output end of the power assembly extends into the interior of the cooling fan (5) and is fixedly connected to the cooling fan (5); and a side of the power assembly away from the cooling fan (5) extends into the interior of the protection frame (8) and is fixedly connected to the protection frame (8).

6. The ventilation device for a frequency converter cabinet according to claim 5, characterized in that: The power assembly comprises a motor (9), wherein the motor (9) is arranged between the protective frame (8) and the cooling fan (5), the output end of the motor (9) extends into the interior of the cooling fan (5), the outer surface of the output end of the motor (9) is fixedly connected to the interior of the cooling fan (5), the side of the motor (9) away from the cooling fan (5) extends out of the interior of the protective frame (8), and the outer surface of the motor (9) is fixedly connected to the inner surface of the protective frame (8).

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