Machine tool switchboard cooling device

Abstract

The application relates to the technical field of cooling devices, in particular to a machine tool power distribution cabinet cooling device which comprises an air suction structure, a refrigeration structure and a flow-limiting air dispersing structure, the air suction structure is used for guiding external air into the refrigeration structure, the refrigeration structure is used for generating cold air and discharging the cold air into the power distribution cabinet through the flow-limiting air dispersing structure; the refrigeration structure comprises a tee pipe, a heat exchange box and a heat exchange pipe; by adopting the mode of air compression and heat exchange, cold air can be generated and electronic components in the power distribution cabinet can be directly cooled, the temperature difference between the air discharged into the power distribution cabinet and the electronic components is effectively increased, and the heat exchange efficiency and the cooling effect are improved; the tee pipe is used for air shunting, part of the air is compressed to be heated and pressurized, and the remaining part of the air is used for cooling the heated air, so that the heat exchange of the air itself and the generation of cold air can be realized, the structure is simple, and the functionality is strong.

Description

Technical Field

[0001] This invention relates to the technical field of cooling devices, and in particular to a cooling device for a machine tool power distribution cabinet. Background Technology

[0002] The machine tool power distribution cabinet is a core control unit that integrates various electrical components (such as circuit breakers, relays, frequency converters, programmable logic controllers, etc.). During operation, the electronic components inside the cabinet generate a large amount of Joule heat. In order to ensure the long-term stable operation of the components and avoid thermal failure, appropriate cooling devices must be configured to control the temperature rise inside the cabinet.

[0003] Currently, traditional cooling devices generally use axial flow fans or centrifugal fans installed on the side walls or top of the distribution cabinet. This solution uses the fan to force external air into the cabinet and uses air convection to carry heat out of the distribution cabinet, thereby achieving direct air cooling of the internal electronic components. However, the gas temperature delivered by this open cooling method based on direct fan blowing is generally room temperature, and the temperature difference between the gas and the inside of the distribution cabinet is relatively small, resulting in poor cooling effect. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a machine tool power distribution cabinet cooling device, the specific technical solution of which is as follows:

[0005] The present invention provides a cooling device for a machine tool power distribution cabinet, comprising an air intake structure, a cooling structure, and a flow-limiting and air-dissipating structure. The air intake structure is used to introduce external air into the cooling structure, and the cooling structure is used to generate cold air and discharge it into the power distribution cabinet through the flow-limiting and air-dissipating structure.

[0006] The refrigeration structure includes a three-way pipe, a heat exchange box, and a heat exchange tube. The input end of the three-way pipe is connected to the output end of the suction structure. The heat exchange tube is disposed inside the heat exchange box, and the input end of the heat exchange tube is connected to one output end of the three-way pipe. The output end of the heat exchange tube is connected to the flow-limiting and gas-dispersing structure through a gas guide pipe. The other output end of the three-way pipe is connected to the heat exchange box through a pressure regulating valve.

[0007] The flow-limiting gas distribution structure restricts the airflow velocity entering the power distribution cabinet.

[0008] Furthermore, the flow-limiting and air-dissipating structure includes a long slot plate disposed inside the power distribution cabinet. The long slot plate is provided with an air inlet chamber, a flow-limiting throat, and a wide air slot. The air inlet chamber is connected to the air guide pipe. The airflow in the long slot plate flows outward along the direction of the air inlet chamber, the flow-limiting throat, and the wide air slot.

[0009] Furthermore, the long groove plate is composed of two splicing bodies. The two splicing bodies are distributed left and right relative to the airflow direction in the long groove plate and the length direction of the long groove plate. The distance between the two splicing bodies can be adjusted. A rubber pad is provided between the two splicing bodies.

[0010] Furthermore, two air intake grooves are provided opposite to each other on the outer side wall of the long groove plate. Both air intake grooves correspond to the flow limiting throat. The air intake grooves and the flow limiting throat are connected by several oblique holes, and the oblique holes are inclined along the airflow direction inside the long groove plate.

[0011] Furthermore, several flow-guiding baffles are staggered inside the heat exchange box, and the flow-guiding baffles divide the internal space of the heat exchange box into curved corridors. One end of the curved corridor is connected to the output end of the three-way pipe, and the other end of the curved corridor is provided with a second air guide pipe. The output end of the second air guide pipe is provided with an exhaust hopper.

[0012] The cooling device also includes a third air duct that is connected to the power distribution cabinet. The third air duct is connected to the exhaust hopper, and the airflow direction in the exhaust hopper is parallel to the output direction of the third air duct.

[0013] Furthermore, a partition is provided inside the exhaust hopper, and several guide pipes are inserted through the partition, and the guide pipes are connected to the air guide pipe.

[0014] An air guide ring groove is formed on the inner wall of the exhaust hopper. The air guide ring groove and the second air guide pipe are respectively located on both sides of the partition. The third air guide pipe is connected to the air guide ring groove.

[0015] The air guide ring groove is located in the middle region of the guide pipe along its length or in the region near the partition.

[0016] Furthermore, the air intake structure includes a cylinder, a main shaft is coaxially rotatably arranged inside the cylinder, a plurality of isolation plates are arranged on the outer wall of the main shaft, the plurality of isolation plates divide the internal space of the cylinder, and a deformable diaphragm that can expand and contract is arranged between two adjacent isolation plates;

[0017] An air inlet pipe is connected to the cylinder, and a three-way pipe is connected to the cylinder.

[0018] Furthermore, an adjustment column is provided between two adjacent isolation plates, and the adjustment column is connected to the deformable diaphragm through adjustment arm one and adjustment arm two;

[0019] A secondary chamber is coaxially arranged on the end face of the cylinder, and the secondary chamber is separated from the cylinder by a partition plate. The adjusting column passes through the partition plate and extends into the secondary chamber.

[0020] An annular guide groove is provided on the inner wall of the auxiliary chamber. The guide groove is composed of two arc grooves with different diameters. Several sliding columns are slidably arranged in the guide groove. The sliding columns are connected to the corresponding adjustment columns through connecting arms.

[0021] The beneficial effects of this invention are as follows:

[0022] By employing air compression and heat exchange, cold air can be generated to directly cool the electronic components inside the distribution cabinet, effectively increasing the temperature difference between the air discharged into the distribution cabinet and the electronic components, thereby improving heat exchange efficiency and cooling effect. By using a three-way pipe to split the air, some of the air is compressed and heated and pressurized, and the remaining air is used to cool the heated air, thus achieving the purpose of air heat exchange and cold air generation. Its structure is simple and highly functional. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of a cooling device for a machine tool power distribution cabinet.

[0025] Figure 2 for Figure 1 A cross-sectional structural diagram of the central cooling structure;

[0026] Figure 3 for Figure 1 Schematic diagram of the medium-limit flow diffuser structure;

[0027] Figure 4 for Figure 3 A schematic diagram of the cross-sectional structure;

[0028] Figure 5 for Figure 1 A cross-sectional view of the central exhaust duct;

[0029] Figure 6 for Figure 1 Schematic diagram of the mid-inhalation structure;

[0030] Figure 7 for Figure 6 A cross-sectional view of the middle cylinder;

[0031] Figure 8 for Figure 6Schematic diagram of the cross-sectional structure of the central auxiliary chamber;

[0032] Figure label:

[0033] 1. Intake structure; 2. Refrigeration structure; 3. Flow-limiting and gas-dispersing structure; 4. T-junction; 5. Heat exchange box; 6. Heat exchange tube; 7. Pressure regulating valve; 8. Air guide pipe one; 9. Flow-guiding baffle; 10. Long slot plate; 11. Intake chamber; 12. Flow-limiting throat; 13. Wide air slot; 14. Rubber pad; 15. Intake slot; 16. Inclined hole; 17. Air guide pipe two; 18. Exhaust hopper; 19. Air guide pipe three; 20. Baffle; 21. Guide branch pipe; 22. Air guide ring groove; 23. Cylinder; 24. Main shaft; 25. Isolation plate; 26. Deformable diaphragm; 27. Adjusting column; 28. Adjusting arm one; 29. ​​Adjusting arm two; 30. Secondary chamber; 31. Baffle plate; 32. Arc groove; 33. Sliding column; 34. Connecting arm; 35. Intake pipe. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0035] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limiting this invention.

[0036] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. This embodiment is written in a progressive manner.

[0037] like Figures 1 to 8 As shown, a machine tool power distribution cabinet cooling device of the present invention includes an air intake structure 1, a cooling structure 2 and a flow-limiting and air-dissipating structure 3. The air intake structure 1 is used to introduce external air into the cooling structure 2, and the cooling structure 2 is used to generate cold air and discharge it into the power distribution cabinet through the flow-limiting and air-dissipating structure 3.

[0038] The refrigeration structure 2 includes a three-way pipe 4, a heat exchange box 5, and a heat exchange tube 6. The inlet end of the three-way pipe 4 is connected to the outlet end of the suction structure 1. The heat exchange tube 6 is installed inside the heat exchange box 5, and the inlet end of the heat exchange tube 6 is connected to one outlet end of the three-way pipe 4. The outlet end of the heat exchange tube 6 is connected to the flow-limiting and gas-dispersing structure 3 through a gas guide pipe 8. The other outlet end of the three-way pipe 4 is connected to the heat exchange box 5 through a pressure regulating valve 7.

[0039] Among them, the flow-limiting gas dissipation structure 3 limits the airflow velocity into the power distribution cabinet.

[0040] In this invention, both the intake structure 1 and the cooling structure 2 are located outside the distribution cabinet, while the flow-limiting and heat-dissipating structure 3 is located inside the distribution cabinet. To facilitate gas flow and heat exchange within the distribution cabinet, the flow-limiting and heat-dissipating structure 3 can be located at the top or bottom of the inner side of the distribution cabinet. When the flow-limiting and heat-dissipating structure 3 is located at the top of the inner side of the distribution cabinet, it will output gas downwards and cool the electronic components inside the distribution cabinet. When the flow-limiting and heat-dissipating structure 3 is located at the bottom of the inner side of the distribution cabinet, the gas discharged by the flow-limiting and heat-dissipating structure 3 will drive the heat around the electronic components upwards, thereby helping to accelerate the heat dissipation from the distribution cabinet. To facilitate gas flow, an exhaust port can be opened at the top of the distribution cabinet to facilitate heat dissipation and to maintain normal pressure inside the distribution cabinet.

[0041] In operation, the intake structure 1 continuously draws in external gas and introduces it into the three-way pipe 4. Part of the air in the three-way pipe 4 is introduced into the heat exchange pipe 6. Due to the flow-limiting and gas-dissipating structure 3 restricting the amount of gas discharged, the gas inside the heat exchange pipe 6 gradually increases, the gas pressure rises, and the gas temperature rises. When the gas pressure inside the heat exchange pipe 6 reaches a certain value, part of the air in the three-way pipe 4 will be introduced into the heat exchange box 5 through the pressure regulating valve 7. Since the gas in the heat exchange box 5 is released, its pressure and temperature are relatively low. The gas in the heat exchange box 5 exchanges heat with the gas in the heat exchange pipe 6 through the heat exchange pipe 6, thereby reducing the temperature of the gas inside the heat exchange pipe 6. The gas in the heat exchange pipe 6 is released into the distribution cabinet through the gas guide pipe 8 and the flow-limiting and gas-dissipating structure 3. At this time, the pressure and temperature of the released gas both decrease, thereby further reducing the temperature of the gas after heat exchange, causing the flow-limiting and gas-dissipating structure 3 to discharge low-temperature air. The low-temperature air directly cools down the electronic components in the distribution cabinet.

[0042] It should be noted that since the gas in the three-way pipe 4 is directly introduced into the heat exchange tube 6 and the heat exchange box 5, the gas in the heat exchange tube 6 at high pressure and high temperature will not flow back into the three-way pipe 4 and then into the heat exchange box 5 through the pressure regulating valve 7, thereby avoiding the phenomenon of temperature leakage of the air inside the heat exchange tube 6; when it is necessary to adjust the temperature of the gas released by the flow-limiting gas dissipation structure 3, the internal pressure of the heat exchange tube 6 can be adjusted by adjusting the pressure regulating valve 7.

[0043] By employing air compression and heat exchange, cold air can be generated to directly cool the electronic components inside the distribution cabinet, effectively increasing the temperature difference between the air discharged into the distribution cabinet and the electronic components, thereby improving heat exchange efficiency and cooling effect. The air is split using a three-way pipe 4, which compresses and heats up some of the air, and then uses the remaining air to cool the heated air, thus achieving the purpose of air heat exchange and cold air generation. Its structure is simple and highly functional.

[0044] Furthermore, the flow-limiting and air-dissipating structure 3 includes a long slot plate 10 disposed inside the distribution cabinet. The long slot plate 10 is provided with an air inlet chamber 11, a flow-limiting throat 12 and a wide air slot 13. The air inlet chamber 11 is connected to the air guide pipe 8. The airflow in the long slot plate 10 flows outward along the direction of the air inlet chamber 11, the flow-limiting throat 12 and the wide air slot 13.

[0045] like Figure 3 and Figure 4 As shown, the air inlet chamber 11, the flow-limiting throat 12, and the wide air groove 13 are arranged in sequence. The flow-limiting throat 12 is located between the air inlet chamber 11 and the wide air groove 13, and the width of the flow-limiting throat 12 is relatively small. The inner wall of the wide air groove 13 is arc-shaped, which facilitates the guidance of the gas passing through the flow-limiting throat 12 and increases the gas release area. The air in the heat exchange tube 6 is introduced into the air inlet chamber 11 through the air guide pipe 8. When the air in the air inlet chamber 11 passes through the flow-limiting throat 12, the air velocity increases, the static pressure inside the gas decreases, and the drastic change in pressure difference causes the air temperature to drop. At the same time, the flow-limiting throat 12 restricts the flow of the gas in the opposite direction, thereby increasing the amount of air inside the heat exchange tube 6 and the air guide pipe 8 and increasing the air pressure. When the air enters the wide air groove 13, the gas expands, and the gas pressure and temperature further decrease, thereby achieving multiple cooling functions.

[0046] Furthermore, the long trough plate 10 is composed of two splicing bodies. The two splicing bodies are distributed left and right relative to the airflow direction inside the long trough plate 10 and the length direction of the long trough plate 10. The distance between the two splicing bodies can be adjusted. A rubber pad 14 is provided between the two splicing bodies.

[0047] like Figure 4 As shown, the two splicing bodies are distributed left and right, and the two splicing bodies are set opposite each other with the gas flow direction in the long groove plate 10 and the long direction of the long groove plate 10 as the interface. The two splicing bodies have the same structure. The rubber gasket 14 between the two splicing bodies can play a sealing connection role. When the distance between the two splicing bodies changes, the compression of the rubber gasket 14 changes, and the width of the flow-limiting throat 12 changes. This adjusts the flow-limiting effect of the flow-limiting gas dispersing structure 3 on the gas flow and the gas flow rate in the flow-limiting throat 12. At the same time, it can also adjust the gas pressure difference between the flow-limiting throat 12 and the air guide tube 8.

[0048] The two spliced ​​parts can be connected by fasteners such as bolts.

[0049] Furthermore, two air intake grooves 15 are provided opposite to each other on the outer side wall of the long groove plate 10. Both air intake grooves 15 correspond to the flow limiting throat 12. The air intake grooves 15 and the flow limiting throat 12 are connected by a number of oblique holes 16, and the oblique holes 16 are inclined along the airflow direction inside the long groove plate 10.

[0050] When the gas flows through the flow-limiting throat 12, its flow velocity increases and the static pressure decreases. At this time, external air can be drawn into the flow-limiting throat 12 through the suction groove 15 and the oblique hole 16. This part of the air mixes with the cold air flowing in the flow-limiting throat 12, thereby increasing the air volume and enabling the cold air to cool the electronic components over a wider area. It should be noted that the "external air" mentioned here can be the air inside or outside the distribution cabinet. Since the external air is drawn into the flow-limiting throat 12, the amount of this part of the air is relatively small. The temperature rise phenomenon after this part of the air mixes with the original air in the flow-limiting throat 12 is small, and the temperature of the air discharged through the opening of the long slot plate 10 remains at a low temperature.

[0051] Furthermore, several flow-guiding baffles 9 are staggered inside the heat exchange box 5, which divide the internal space of the heat exchange box 5 into curved corridors. One end of the curved corridor is connected to the output end of the three-way pipe 4, and the other end of the curved corridor is provided with a second air guide pipe 17. An exhaust hopper 18 is provided at the output end of the second air guide pipe 17.

[0052] The cooling device also includes a duct pipe 319 connected to the power distribution cabinet. The duct pipe 319 is connected to the exhaust hopper 18, and the airflow direction in the exhaust hopper 18 is parallel to the output direction of the duct pipe 319.

[0053] like Figure 2 As shown, several flow-guiding baffles 9 are staggered inside the heat exchange box 5, which allows the airflow from the three-way pipe 4 into the heat exchange box 5 to flow in a tortuous shape, extending the airflow path and residence time in the heat exchange box 5, thereby improving the heat exchange effect.

[0054] The air duct 19 and the flow-limiting and air-dispersing structure 3 are respectively set on the upper and lower sides of the distribution cabinet. The air that has completed heat exchange with the heat exchange tube 6 is discharged through the air duct 17 and the exhaust hopper 18. The high-speed airflow will form a negative pressure zone behind it, thereby drawing out the air in the air duct 19 and forming a negative pressure inside the air duct 19. The air duct 19 then draws away the air in the distribution cabinet, which facilitates the full utilization of the air that has completed heat exchange and improves the gas circulation efficiency in the distribution cabinet.

[0055] Furthermore, a partition 20 is provided inside the exhaust hopper 18, and several guide pipes 21 are inserted through the partition 20, and the guide pipes 21 are connected to the air guide pipe 17.

[0056] An air guide ring groove 22 is provided on the inner wall of the exhaust hopper 18. The air guide ring groove 22 and the second air guide pipe 17 are located on both sides of the partition 20, and the third air guide pipe 19 is connected to the air guide ring groove 22.

[0057] The air guide ring groove 22 is located in the middle region of the guide pipe 21 along its length or in the region near the partition plate 20.

[0058] Air in the second air duct 17 is introduced into each guide branch 21 and discharged outward through the port of each guide branch 21. This creates a negative pressure zone around each guide branch 21. The negative pressure zone formed around several guide branch 21 completely fills the exhaust hopper 18, so that each guide branch 21 can guide the air flow in the third air duct 19, increase the guiding area, and improve the air discharge speed in the distribution cabinet.

[0059] The partition 20 can isolate the air guide ring groove 22 and the air guide pipe 2 17. The air in the distribution cabinet can be introduced into the air guide ring groove 22 through the air guide pipe 3 19. The air guide ring groove 22 can discharge air from the inner wall of the exhaust hopper 18 to the space between several guide pipes 21.

[0060] Furthermore, the air intake structure 1 includes a cylinder 23, a main shaft 24 is coaxially rotatably arranged inside the cylinder 23, a plurality of isolation plates 25 are arranged on the outer wall of the main shaft 24, the plurality of isolation plates 25 divide the internal space of the cylinder 23, and a deformable diaphragm 26 that can expand and contract is arranged between two adjacent isolation plates 25.

[0061] An air inlet pipe 35 is connected to the cylinder 23, and a three-way pipe 4 is connected to the cylinder 23.

[0062] The main shaft 24 can be driven to rotate by a motor. When the main shaft 24 rotates, it will drive several isolation plates 25 and several deformable diaphragms 26 to move synchronously. When the deformable diaphragm 26 moves to the position of the air inlet pipe 35, the deformable diaphragm 26 contracts towards the main shaft 24. At this time, the space between two adjacent isolation plates 25 increases, and external air is drawn into the space between the two adjacent isolation plates 25 through the air inlet pipe 35. When the deformable diaphragm 26 moves to the position of the three-way pipe 4, the deformable diaphragm 26 expands outward in the direction away from the main shaft 24. The deformable diaphragm 26 squeezes the air between the two adjacent isolation plates 25 into the three-way pipe 4, thereby realizing the continuous air delivery function.

[0063] Compared to traditional fans, the above structure can achieve continuous high-pressure air delivery, and its use of a rotating mode for continuous air delivery can greatly improve air delivery efficiency, avoid gas leakage, and improve equipment operation stability.

[0064] Furthermore, an adjustment column 27 is provided between two adjacent isolation plates 25, and the adjustment column 27 is connected to the deformable diaphragm 26 through an adjustment arm 1 28 and an adjustment arm 29;

[0065] A secondary chamber 30 is coaxially arranged on the end face of the cylinder 23. The secondary chamber 30 is separated from the cylinder 23 by a partition 31. The adjusting column 27 passes through the partition 31 and extends into the secondary chamber 30.

[0066] An annular guide groove is provided on the inner wall of the auxiliary chamber 30. The guide groove is composed of two arc grooves 32 with different diameters. Several sliding columns 33 are slidably arranged in the guide groove. The sliding columns 33 are connected to the corresponding adjusting columns 27 through the connecting arm 34.

[0067] Adjusting arm 28 is rotatably mounted on adjusting column 27. Adjusting arm 29 is rotatably connected at both ends to adjusting arm 28 and the middle of deformable diaphragm 26, respectively. Thus, when adjusting column 27 rotates, adjusting arm 28 and adjusting arm 29 can be driven to bend and extend, thereby pushing deformable diaphragm 26 to expand and contract. Partition 31 can separate cylinder 23 and secondary chamber 30. At the same time, partition 31 can support adjusting column 27 and main shaft 24. When main shaft 24 rotates, partition 31 will rotate synchronously. Adjusting column 27 will push sliding column 33 to move in guide groove through connecting arm 34. Since guide groove is composed of two arc grooves 32 with different diameters, when sliding column 33 moves between the two arc grooves 32, the distance between sliding column 33 and main shaft 24 changes. At this time, sliding column 33 will push adjusting column 27 to rotate through connecting arm 34, thereby driving deformable diaphragm 26 to move.

[0068] To improve the strength of the deformable diaphragm 26, it can be made of a multi-layered structure, such as a rubber layer, a steel strip layer, and a fiber layer. This allows the deformable diaphragm 26 to deform in the radial direction of the main axis 24 while preventing it from twisting.

[0069] The axis of the arc groove 32 is set coaxially with the main shaft 24.

[0070] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A cooling device for a machine tool power distribution cabinet, characterized in that, It includes an air intake structure, a cooling structure, and a flow-limiting and air-dissipating structure. The air intake structure is used to introduce external air into the cooling structure, and the cooling structure is used to generate cold air and discharge it into the power distribution cabinet through the flow-limiting and air-dissipating structure. The refrigeration structure includes a three-way pipe, a heat exchange box, and a heat exchange tube. The input end of the three-way pipe is connected to the output end of the suction structure. The heat exchange tube is disposed inside the heat exchange box, and the input end of the heat exchange tube is connected to one output end of the three-way pipe. The output end of the heat exchange tube is connected to the flow-limiting and gas-dispersing structure through a gas guide pipe. The other output end of the three-way pipe is connected to the heat exchange box through a pressure regulating valve. The flow-limiting gas dispersion structure limits the airflow velocity entering the power distribution cabinet; The flow-limiting and air-dissipating structure includes a long slot plate disposed inside the power distribution cabinet. The long slot plate is provided with an air inlet chamber, a flow-limiting throat and a wide air slot. The air inlet chamber is connected to the air guide pipe. The airflow in the long slot plate flows outward along the direction of the air inlet chamber, the flow-limiting throat and the wide air slot. The air intake structure includes a cylinder, inside which a main shaft is coaxially rotatable. Several isolation plates are provided on the outer wall of the main shaft, and the several isolation plates divide the internal space of the cylinder. A deformable diaphragm that can expand and contract is provided between two adjacent isolation plates. An air inlet pipe is connected to the cylinder, and a three-way pipe is connected to the cylinder. An adjustment column is provided between two adjacent isolation plates, and the adjustment column is connected to the deformable diaphragm through adjustment arm one and adjustment arm two; A secondary chamber is coaxially arranged on the end face of the cylinder, and the secondary chamber is separated from the cylinder by a partition plate. The adjusting column passes through the partition plate and extends into the secondary chamber. An annular guide groove is provided on the inner wall of the auxiliary chamber. The guide groove is composed of two arc grooves with different diameters. Several sliding columns are slidably arranged in the guide groove. The sliding columns are connected to the corresponding adjustment columns through connecting arms.

2. The machine tool power distribution cabinet cooling device according to claim 1, characterized in that, The long trough plate is composed of two splicing bodies. The two splicing bodies are distributed left and right relative to the airflow direction and the length direction of the long trough plate. The distance between the two splicing bodies can be adjusted. A rubber pad is provided between the two splicing bodies.

3. A machine tool power distribution cabinet cooling device according to claim 2, characterized in that, Two air intake slots are arranged opposite each other on the outer side wall of the long slot plate. Both air intake slots correspond to the flow limiting throat. The air intake slots and the flow limiting throat are connected by several oblique holes, and the oblique holes are inclined along the airflow direction inside the long slot plate.

4. A machine tool power distribution cabinet cooling device according to claim 1, characterized in that, Several flow-guiding baffles are staggered inside the heat exchange box, dividing the internal space of the heat exchange box into curved corridors. One end of the curved corridor is connected to the output end of the three-way pipe, and the other end of the curved corridor is provided with a second air guide pipe. An exhaust hopper is provided at the output end of the second air guide pipe. The cooling device also includes a third air duct that is connected to the power distribution cabinet. The third air duct is connected to the exhaust hopper, and the airflow direction in the exhaust hopper is parallel to the output direction of the third air duct.

5. A machine tool power distribution cabinet cooling device according to claim 4, characterized in that, A partition is provided inside the exhaust hopper, and several guide pipes are inserted through the partition, and the guide pipes are connected to the air guide pipe. An air guide ring groove is formed on the inner wall of the exhaust hopper. The air guide ring groove and the second air guide pipe are respectively located on both sides of the partition. The third air guide pipe is connected to the air guide ring groove. The air guide ring groove is located in the middle region of the guide pipe along its length or in the region near the partition.

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