Heat dissipation air duct structure of high-voltage frequency converter

Abstract

The utility model discloses a heat dissipation air duct structure of a high-voltage frequency converter, which belongs to the technical field of high-voltage frequency converters and comprises a heat collection shell, a conveying air duct mechanism is arranged at the top of the heat collection shell, and a heat recovery mechanism is arranged on the conveying air duct mechanism. According to the utility model, heat generated by the high-voltage frequency converter is discharged through the heat collection shell and the conveying air duct mechanism, and in addition, outdoor natural wind blows the wind cap fan blades to enable the heat collection shell and the conveying air duct mechanism to generate certain suction force, so that the heat can be automatically discharged; when the self-discharging speed is not enough to quickly discharge the heat, the heat is directly pumped through the draft fan, so that the heat is quickly discharged from the heat collection shell and the conveying air duct mechanism, the structure of the air cap fan blades can prevent rainwater from entering the conveying air duct mechanism, and meanwhile, the discharge of the heat can be ensured.

Description

Technical Field

[0001] This utility model relates to the field of high voltage frequency converter technology, and more specifically, to a high voltage frequency converter heat dissipation duct structure. Background Technology

[0002] A frequency converter is a control device that uses the switching action of power semiconductor devices to convert industrial frequency power into electrical energy of another frequency. With the rapid development of modern power electronics and microelectronics technologies, high-voltage, high-power variable frequency speed control devices have become increasingly sophisticated. Previously difficult-to-solve high-voltage problems have been effectively addressed in recent years through device series connection or unit series connection. However, high-voltage frequency converters generate heat during operation, requiring heat dissipation and cooling to ensure their normal operation.

[0003] A search revealed that utility model patent CN220307665U discloses a heat dissipation duct structure for a high-voltage frequency converter, including a high-voltage frequency converter heat dissipation duct shell. A heat dissipation component is disposed inside the high-voltage frequency converter heat dissipation duct shell, and a temperature control component is installed on the outer wall of the high-voltage frequency converter heat dissipation duct shell. An air outlet component is disposed on the top of the high-voltage frequency converter heat dissipation duct shell. The heat dissipation component includes a device fan, a device air inlet, and a device air outlet. The device fan has a device air inlet on its side and a device air outlet on its top. The device fan and the device air inlet form a communication structure through the inner cavity of the heat dissipation component. This patent facilitates the reduction of the ambient temperature inside the electrical room of the high-voltage frequency converter, reduces the failure rate and maintenance costs, and facilitates intelligent control of the operation of the heat dissipation component.

[0004] However, the aforementioned patents have the following shortcomings: the top cover of the air outlet assembly can only be opened with a certain amount of thrust, which makes it difficult for the heat generated by the inverter to dissipate from the air duct on its own. Furthermore, the top cover can only be opened upwards, meaning rainwater will still enter the air duct during rainy weather, making it impractical. Additionally, heat dissipation outdoors can negatively impact the external environment, hindering heat recovery and utilization. Therefore, we propose a high-voltage inverter cooling air duct structure. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of this utility model is to provide a heat dissipation air duct structure for a high-voltage frequency converter.

[0006] To solve the above problems, the present invention adopts the following technical solution:

[0007] A high-voltage frequency converter heat dissipation duct structure includes a heat collection shell, a conveying duct mechanism at the top of the heat collection shell, a heat recovery mechanism on the conveying duct mechanism, an installation sleeve at the end of the conveying duct mechanism, a support frame fixedly connected to the inner side of the installation sleeve, a bearing fixedly sleeved in the middle of the support frame, a support rod fixedly sleeved inside the bearing, a fan blade fixedly connected to the top of the support rod, an inner limiting ring fixedly connected to the top surface of the installation sleeve, an outer limiting ring at the bottom end of the fan blade, the inner side of the outer limiting ring and the outer side of the inner limiting ring fitting together, multiple exhaust fans fixedly installed in the inner cavity of the heat collection shell, multiple temperature sensors fixedly installed in the inner cavity of the heat collection shell, and a controller fixedly installed on the outer side of the heat collection shell.

[0008] As a preferred embodiment of this utility model, the conveying air duct mechanism includes a first bent pipe fixedly connected to the top of the heat collection shell, an air guide pipe fixedly connected to the end of the first bent pipe, a second bent pipe fixedly connected to the end of the air guide pipe, an exhaust pipe fixedly connected to the end of the second bent pipe, and an installation sleeve fitted on the outside of the exhaust pipe.

[0009] As a preferred embodiment of this utility model, the heat recovery mechanism includes insulated water tanks fixedly connected to both sides of the air duct, a plurality of heat exchange copper tubes fixedly sleeved between the two insulated water tanks, the plurality of heat exchange copper tubes penetrating the inner cavity of the air duct, a drain pipe fixedly sleeved on the bottom surface of one insulated water tank, a valve fixedly installed at the bottom end of the drain pipe, two floats sleeved in the inner cavity of the other insulated water tank, a connecting rod fixedly connected between the two floats, a plugging ball fixedly connected to the top surface of the connecting rod, and an inlet pipe fixedly sleeved on the top surface of the other insulated water tank and directly above the plugging ball.

[0010] As a preferred embodiment of this utility model, the outer side of the exhaust pipe is provided with multiple screw holes, the outer side of the mounting sleeve is provided with multiple mounting holes, and bolts are fitted into the inner cavities of the multiple mounting holes, with the ends of the bolts threaded into the inner cavities of the screw holes.

[0011] As a preferred embodiment of this utility model, the three sides of the two floats are respectively attached to the inner wall of the insulated water tank.

[0012] In a preferred embodiment of this utility model, the outer side of the exhaust pipe is fitted to the inner wall of the mounting sleeve.

[0013] Compared with existing technologies, the advantages of this utility model are:

[0014] (1) In this utility model, the heat generated by the high voltage frequency converter is discharged through the heat collection shell and the conveying air duct mechanism. In addition, the outdoor natural wind blows the fan blades of the hood, which can generate a certain suction force in the heat collection shell and the conveying air duct mechanism, so that the heat can be discharged by itself. When the speed of self-discharge is not enough to quickly discharge the heat, the heat is directly drawn by the exhaust fan, so that the heat is quickly discharged from the heat collection shell and the conveying air duct mechanism. In addition, the structure of the fan blades of the hood can prevent rainwater from entering the conveying air duct mechanism, while ensuring the discharge of heat.

[0015] (2) In this utility model, when hot air flows in the air duct, the hot air and the cold water in the heat exchange copper tube exchange heat, thereby recovering a certain amount of heat in the hot air. The warm water generated by the heat exchange can be released for use through the drain pipe and valve. The addition of cold water to the inner cavity of the insulated water tank can be achieved automatically through the cooperation of the inlet pipe, float plate, connecting rod and plug ball. It has good practicality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is an exploded view of the overall structure of this utility model;

[0018] Figure 3 This is a cross-sectional schematic diagram of the conveying air duct mechanism of this utility model;

[0019] Figure 4 This is a cross-sectional view of the mounting sleeve of this utility model;

[0020] Figure 5 This is a cross-sectional schematic diagram of the heat recovery mechanism of this utility model.

[0021] Explanation of the labels in the diagram:

[0022] 1. Heat collector shell; 2. Air conveying duct mechanism; 3. Heat recovery mechanism; 4. Mounting sleeve; 5. Support frame; 6. Bearing; 7. Support rod; 8. Fan blade; 9. Outer limit ring; 10. Inner limit ring; 11. Mounting hole; 12. Screw hole; 13. Bolt; 14. Temperature sensor; 15. Exhaust fan; 16. First bend pipe; 17. Air guide pipe; 18. Second bend pipe; 19. Exhaust pipe; 20. Controller; 21. Insulated water tank; 22. Heat exchange copper tube; 23. Water inlet pipe; 24. Float plate; 25. Connecting rod; 26. Plug ball; 27. Water outlet pipe; 28. Valve. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0024] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Example:

[0027] Please see Figure 1-5 A high-voltage frequency converter heat dissipation duct structure includes a heat collection shell 1, a conveying duct mechanism 2 on the top of the heat collection shell 1, a heat recovery mechanism 3 on the conveying duct mechanism 2, an installation sleeve 4 at the end of the conveying duct mechanism 2, a support frame 5 fixedly connected to the inner side of the installation sleeve 4, a bearing 6 fixedly sleeved in the middle of the support frame 5, a support rod 7 fixedly sleeved in the inner side of the bearing 6, a fan blade 8 fixedly connected to the top of the support rod 7, an inner limiting ring 10 fixedly connected to the top surface of the installation sleeve 4, an outer limiting ring 9 at the bottom end of the fan blade 8, the inner side of the outer limiting ring 9 and the outer side of the inner limiting ring 10 being in contact, multiple exhaust fans 15 fixedly installed in the inner cavity of the heat collection shell 1, multiple temperature sensors 14 fixedly installed in the inner cavity of the heat collection shell 1, and a controller 20 fixedly installed on the outer side of the heat collection shell 1.

[0028] In this embodiment, the blade angle on the outer side of the hood fan blade 8 is the same as that of the existing hood fan blade. When the outdoor natural wind blows the hood fan blade 8, the hood fan blade 8 forms a negative pressure zone during rotation. That is, the air pressure inside the hood fan blade 8 is lower than the air pressure in the conveying air duct mechanism 2. Due to the pressure difference, the conveying air duct mechanism 2 generates a certain suction force so that the heat of the high voltage frequency converter can be automatically discharged through the heat collection housing 1 and the conveying air duct mechanism 2. In addition, the heat collection housing 1 is installed on the upper part of the high voltage frequency converter mounting box. Heat is introduced into the inner cavity of the heat collection housing 1 through the heat exhaust hole on the top of the box. At the same time, the exhaust fan 15 is started to extract heat from the box.

[0029] For details, please refer to Figures 1 to 3 The air conveying duct mechanism 2 includes a first bent pipe 16 fixedly connected to the top of the heat collection shell 1, an air guide pipe 17 fixedly connected to the end of the first bent pipe 16, a second bent pipe 18 fixedly connected to the end of the air guide pipe 17, an exhaust pipe 19 fixedly connected to the end of the second bent pipe 18, and an installation sleeve 4 sleeved on the outside of the exhaust pipe 19.

[0030] In this embodiment, hot air is delivered to the outside through the air duct 17. The air duct 17 can be fixed to the ceiling inside the room, and the length of the air duct 17 is determined according to the actual situation.

[0031] For details, please refer to Figure 1 , Figure 2 and Figure 5 The heat recovery mechanism 3 includes insulated water tanks 21 fixedly connected to both sides of the air duct 17. Multiple heat exchange copper pipes 22 are fixedly sleeved between the two insulated water tanks 21. The multiple heat exchange copper pipes 22 penetrate the inner cavity of the air duct 17. A drain pipe 27 is fixedly sleeved on the bottom surface of one insulated water tank 21. A valve 28 is fixedly installed at the bottom end of the drain pipe 27. Two floats 24 are sleeved in the inner cavity of the other insulated water tank 21. A connecting rod 25 is fixedly connected between the two floats 24. A plugging ball 26 is fixedly connected to the top surface of the connecting rod 25. An inlet pipe 23 is fixedly sleeved on the top surface of the other insulated water tank 21 and directly above the plugging ball 26.

[0032] For details, please refer to Figures 2 to 4 The exhaust pipe 19 has multiple screw holes 12 on its outer side, and the mounting sleeve 4 has multiple mounting holes 11 on its outer side. Bolts 13 are fitted into the inner cavities of the multiple mounting holes 11, and the ends of the bolts 13 are threaded into the inner cavities of the screw holes 12.

[0033] In this embodiment, the mounting sleeve 4 is fixedly installed on the outside of the exhaust pipe 19 by the cooperation of the mounting hole 11, the screw hole 12 and the bolt 13.

[0034] For details, please refer to Figure 5The three sides of the two floats 24 are respectively attached to the inner wall of the insulated water tank 21.

[0035] In this embodiment, the stability of the structure formed by the connection of the two floats 24 and the connecting rod 25 in the inner cavity of the insulated water tank 21 is ensured, so that the floats 24 can only move up and down, thereby ensuring that the plugging ball 26 can only be located directly below the end of the water inlet pipe 23, and thus ensuring that the plugging ball 26 can block the water inlet pipe 23.

[0036] For details, please refer to Figure 2 and Figure 4 The outer side of the exhaust pipe 19 fits against the inner wall of the mounting sleeve 4.

[0037] In this embodiment, the stability and sealing of the mounting sleeve 4 on the exhaust pipe 19 are ensured.

[0038] Working Principle: During operation, temperature sensor 14 first detects the heat radiating from the top of the high-voltage inverter mounting enclosure in real time. Simultaneously, outdoor natural wind drives the fan blades 8 to rotate. During rotation, a negative pressure zone is formed inside the fan blades 8, meaning the air pressure inside the fan blades 8 is lower than the air pressure in the exhaust pipe 19, second bend pipe 18, air guide pipe 17, first bend pipe 16, and heat collector housing 1. Due to this pressure difference, a certain suction force is generated in the heat collector housing 1, allowing the heat in the heat collector housing 1 to be discharged from the heat collector housing 1, first bend pipe 16, air guide pipe 17, second bend pipe 18, and exhaust pipe 19. Furthermore, the structure of the fan blades 8 ensures that rainwater does not enter the exhaust pipe 19, while also effectively dissipating heat. Then, when temperature sensor 14 detects that the temperature in the heat collector housing 1 reaches a set value, indicating that natural heat dissipation is insufficient, controller 20 starts the exhaust fan 15, which then dissipates heat from the enclosure housing the high-voltage inverter. The process involves evacuating air to remove heat, and then expelling the hot air through the first bend 16, the vent pipe 17, the second bend 18, and the exhaust pipe 19. As the hot air flows through the inner cavity of the vent pipe 17, it exchanges heat with the cold water in the heat exchange copper pipe 22, thus heating the water in the insulated water tank 21 and the heat exchange copper pipe 22. This process recovers energy from the hot air and simultaneously warms the water in the insulated water tank 21 and the heat exchange copper pipe 22. Finally, valve 28 can be opened to allow the insulated water tank to cool. Warm water from tank 21 is released from valve 28 and can be used for handwashing, etc. In addition, when water is released from the insulated water tank 21, float 24, connecting rod 25 and plug ball 26 move down with the water temperature. At this time, plug ball 26 no longer blocks the end of inlet pipe 23, allowing external water to be introduced into insulated water tank 21 from inlet pipe 23 for timely replenishment. As the water level rises, float 24 floats on the water surface and moves upward, thereby driving plug ball 26 to re-block the end of inlet pipe 23.

[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A high-voltage frequency converter heat dissipation air duct structure comprising a heat collecting shell (1), characterized in that: The top of the heat collecting shell (1) is provided with a conveying air duct mechanism (2), the conveying air duct mechanism (2) is provided with a heat recovery mechanism (3), the end of the conveying air duct mechanism (2) is provided with a mounting sleeve (4), the inner side of the mounting sleeve (4) is fixedly connected with a support frame (5), the middle part of the support frame (5) is fixedly sleeved with a bearing (6), the inner side of the bearing (6) is fixedly sleeved with a support rod (7), the top end of the support rod (7) is fixedly connected with a wind cap fan blade (8), the top surface of the mounting sleeve (4) is fixedly connected with an inner limiting ring (10), the bottom end of the wind cap fan blade (8) is provided with an outer limiting ring (9), the inner side surface of the outer limiting ring (9) and the outer side surface of the inner limiting ring (10) are fitted, a plurality of exhaust fans (15) are fixedly installed in the inner cavity of the heat collecting shell (1), a plurality of temperature sensors (14) are fixedly installed in the inner cavity of the heat collecting shell (1), and a controller (20) is fixedly installed on the outer side of the heat collecting shell (1); The conveying air duct mechanism (2) comprises a first elbow pipe (16) fixedly connected to the top of the heat collecting shell (1), the end of the first elbow pipe (16) is fixedly connected with a gas guide pipe (17), the end of the gas guide pipe (17) is fixedly connected with a second elbow pipe (18), the end of the second elbow pipe (18) is fixedly connected with an exhaust pipe (19), and the mounting sleeve (4) is sleeved on the outer side of the exhaust pipe (19); The heat recovery mechanism (3) comprises heat preservation water tanks (21) fixedly connected on both sides of the gas guide pipe (17), a plurality of heat exchange copper pipes (22) are fixedly sleeved between the two heat preservation water tanks (21), the plurality of heat exchange copper pipes (22) penetrate the inner cavity of the gas guide pipe (17), the bottom surface of one of the heat preservation water tanks (21) is fixedly sleeved with a water drain pipe (27), the bottom end of the water drain pipe (27) is fixedly installed with a valve (28), the inner cavity of the other heat preservation water tank (21) is sleeved with two floating plates (24), the two floating plates (24) are fixedly connected with a connecting rod (25), the top surface of the connecting rod (25) is fixedly connected with a plug ball (26), and the top surface of the other heat preservation water tank (21) and located directly above the plug ball (26) is fixedly sleeved with a water inlet pipe (23).

2. The heat dissipation air duct structure of a high-voltage frequency converter according to claim 1, characterized in that: A plurality of screw holes (12) are formed in the outer side of the exhaust pipe (19), a plurality of mounting holes (11) are formed in the outer side of the mounting sleeve (4), the inner cavities of the plurality of mounting holes (11) are sleeved with bolts (13), and the ends of the bolts (13) are threadedly installed into the inner cavities of the screw holes (12).

3. The heat dissipation air duct structure of the high-voltage frequency converter according to claim 1, characterized in that: Three side surfaces of the two floating plates (24) are respectively fitted with the inner walls of the heat preservation water tanks (21).

4. The heat dissipation air duct structure of the high-voltage frequency converter according to claim 1, characterized in that: The outer side surface of the exhaust pipe (19) is fitted with the inner wall of the mounting sleeve (4).

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