A modular water-cooled inverter

Abstract

The present invention discloses a modular water-cooled frequency converter, comprising a face cover for mounting a control unit, an industrial control box mounted at one end of the face cover and used for mounting a power unit and a control unit, the control unit comprising a main control unit and a sub-control unit, a first heat conducting frame for mounting the main control unit being fixedly arranged on one side of the industrial control box, a second heat conducting frame for mounting the sub-control unit being mounted on one side of the first heat conducting frame, a cold generating box being mounted on one side of the top of the industrial control box via a mounting mechanism, a circulating cold liquid mechanism being arranged in the cold generating box; the industrial control box can be effectively put into use in a modular frequency converter in which the main control unit, the sub-control unit and the power unit are concentrated, and the water cooling effect can be effectively utilized to achieve adaptive and effective temperature reduction inside the industrial control box.

Description

Technical Field

[0001] The present invention belongs to the technical field of frequency converters, and in particular relates to a modular water-cooled frequency converter. Background Art

[0002] The modular inverter's compact design helps save installation space. Its main frame consists of a front cover and an industrial control box. The control unit for display and adjustment operations is mounted between the front cover and the industrial control box. The main and sub-control units are mounted on mounting brackets within the industrial control box, with the power unit housed in the majority of the space. The use of the main and sub-control units centralizes previously complex control and logic circuits, reducing wiring to the control unit and power unit. This modular design results in relatively low production and maintenance costs.

[0003] When this modular inverter is used at high frequency, the main heat-generating areas are the main control unit, sub-control unit and power unit. At present, this modular inverter on the market has an air cooler installed on the top of the industrial control box, and an air filter is provided at the bottom of the industrial control box. Therefore, when the air cooler is running, the external air is filtered through the lower air filter due to suction and discharged into the industrial control box. The air passes through the main control unit, sub-control unit and power unit, thereby carrying some heat, and is finally discharged through the air cooler.

[0004] However, this method of cooling the main control unit, sub-control unit, and power unit is not sufficient for long-term high-frequency use. Therefore, some developers have proposed using water cooling to perform cooling operations.

[0005] The invention patent with application number: 201810531360.2 discloses a modular series high-voltage inverter water-cooled radiator. The main circuit of the modular series high-voltage inverter adopts a low-voltage power module series voltage-dividing topology. The modular series high-voltage inverter body is equipped with a water-cooled radiator. The water-cooled radiator is mainly composed of multiple independent heat dissipation substrates and a water-cooled plate with embedded water channels. The water-cooled plate is made of a new type of insulating and thermally conductive material. The back of the water-cooled plate has water inlets and outlets and mounting holes. The water-cooled plate and the inverter housing are fastened with bolts. It can be seen that it uses a water-cooled radiator. The heat dissipation substrate is a number of independent copper plates, which are embedded in the surface of the water-cooled plate. The low-voltage power module is installed on each heat dissipation substrate. The water-cooled plate uses a new type of insulating thermal conductive material and has embedded water channels. A certain distance is left between the water channel and the heat dissipation substrate to improve the insulation performance. The water inlet and outlet interfaces of the water channel are sealed with the external water channel. The modular series high-voltage inverter water-cooled radiator has the characteristics of compact structure, good insulation and easy heat dissipation.

[0006] The invention patent application number is 202111003000.3, which discloses an indoor high-voltage, high-power water-cooled inverter power unit. The extended capacitor module includes an extended capacitor base, a film capacitor, and an extended laminated busbar. The extended capacitor base is connected to the rear side of the unit housing base, the film capacitor is located above the extended capacitor base, and the extended laminated busbar is located above the film capacitor. The extended laminated busbar is connected to the inverter laminated busbar. A quick water connector is installed at the front end of the water cooling plate to circulate water for water cooling and heat dissipation.

[0007] The above two methods of cooling the power unit by contact with the water-cooled plate have certain shortcomings. Although the water cooling effect is high, the effective cooling area is concentrated in the contact area with the power unit. In particular, when using modular inverters with concentrated main control units, sub-control units and power units, it is difficult to use the water cooling effect to achieve adaptive and effective cooling inside the industrial control box. Summary of the Invention

[0008] The object of the present invention is to provide a modular water-cooled frequency converter to solve the problems existing in the prior art.

[0009] To achieve the above objectives, the present invention provides the following technical solutions: a modular water-cooled inverter, comprising a cover for mounting a control unit, an industrial control box mounted at one end of the cover and used to mount a power unit and a control unit, wherein the control unit comprises a main control unit and a sub-control unit, a first thermal conductive frame piece for mounting the main control unit being fixedly disposed on one side of the industrial control box, a second thermal conductive frame piece for mounting the sub-control unit being mounted on one side of the first thermal conductive frame piece, a cold generating box being mounted on one side of the top of the industrial control box via a mounting mechanism, and a circulating cold liquid mechanism being provided in the cold generating box;

[0010] A plug-in plate 1 for inserting into a heat conducting frame plate 1 is provided on one side of the bottom of the cold production box. A coil 1 is provided in the plug-in plate 1. Both ends of the coil 1 are connected to a circulating cold liquid mechanism through a drain pipe 1.

[0011] The bottom middle side of the cold box is provided with a second insert for inserting into the second heat conducting frame, the first insert is provided with a second coil, and both ends of the second coil are connected to the circulating cold liquid mechanism through the second drain pipe;

[0012] An air cooling frame is provided on one side of the cold box, a spiral coil is provided in the air cooling frame, an inner guide layer is provided on the inner wall of the spiral coil, and both ends of the spiral coil are connected to the circulating cold liquid mechanism through a third drain pipe;

[0013] The top of the air-cooling frame is provided with an air supply mechanism, which is used to control the external air to enter the air-cooling frame and contact the inner guide layer. The bottom of the industrial control box is provided with a control and exhaust mechanism corresponding to the position of the air-cooling frame, which is used to adjust the air discharge volume in the industrial control box.

[0014] The air supply mechanism is provided with a control mechanism, which is used to control the operating speed of the circulating cold liquid mechanism and the supply of external air to the air supply mechanism according to the temperature on the temperature conducting frame piece 1 and the temperature conducting frame piece 2 and the temperature inside the industrial control box, and is also used to control the control and exhaust mechanism to adjust the air exhaust volume.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The modular water-cooled inverter of the present invention supports the main control unit and the sub-control unit through the first and second heat-conducting frames, and the circulating cold liquid mechanism adopts a plug-in cold-conducting setting, effectively transferring the coldness generated by the circulating cold liquid mechanism to the first and second heat-conducting frames through the cooling plate with an internal winding path structure, thereby effectively taking away the main control unit and the sub-control unit; and under the setting of the air supply mechanism, the circulating cold liquid mechanism and the control and exhaust mechanism, the coldness generated by the circulating cold liquid mechanism can be effectively exchanged with the air, and the heat-exchanged air is blown into the industrial control box, effectively cooling the main control unit, the sub-control unit and the power unit; and under the setting of the control mechanism, the operating speed of the circulating cold liquid mechanism will automatically increase as the operating temperature increases, thereby adaptively improving the heat exchange effect and meeting the adaptive cooling switching under the high-frequency inverter operation mode. Therefore, it can be effectively put into use in a modular inverter in which the main control unit, the sub-control unit and the power unit are concentrated, and effectively utilize the water cooling effect to achieve adaptive and effective cooling inside the industrial control box. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the main view of the present invention;

[0018] Figure 2 for Figure 1 Schematic diagram of the right side;

[0019] Figure 3 for Figure 2 A partial cross-sectional diagram of

[0020] Figure 4 for Figure 3 A schematic diagram of the structure at point a is enlarged;

[0021] Figure 5 This is a schematic diagram of the front view of the cold box in the connection state of the present invention;

[0022] Figure 6 for Figure 5 A partial cross-sectional diagram of

[0023] Figure 7 It is a rear view schematic diagram of the present invention;

[0024] Figure 8 Schematic diagram of the distribution of the spacers and baffles in the cooling plate of the present invention;

[0025] Figure 9 for Figure 7 A partial cross-sectional diagram of

[0026] Figure 10 for Figure 5 Schematic top view of

[0027] Figure 11 for Figure 3 The enlarged structural diagram at point b;

[0028] Figure 12 for Figure 3 Enlarged structural diagram of the middle control box;

[0029] Figure 13 This is a schematic diagram of the connections between modules in the development board of the present invention.

[0030] In the figure: 1. Surface cover, 2. Industrial control box, 3. Temperature conducting frame 1, 4. Temperature conducting frame 2, 5. Cold box, 6. Cooling plate, 7. Spacer, 8. Baffle, 9. Through pipe 1, 10. Insert 1, 11. Coil 1, 12. Circulating pump, 13. Solenoid valve 1, 14. Accumulator, 15. Cover, 16. Insert 2, 17. Through pipe 2, 18. Coil 2, 19. Temperature conducting plate, 20. Mounting plate, 21. Semiconductor refrigerator, 22. Cooling fin, 23. Cooling fan, 24. Air cooling frame, 25. Spiral coil, 26. Inner guide layer, 27. Sealing ring , 28 top cover, 29 connecting rod, 30 baffle, 31 connecting rod, 32 fixing frame, 33 temperature sensor, 34 discharge pipe, 35 air flow velocity sensor, 36 filter box, 37 inner frame, 38 receiving mesh plate, 39 air filter layer, 40 screw cap, 41 solenoid valve 2, 42 connecting pipe, 43 branch connecting pipe, 44 main input pipe, 45 connecting cover, 46 flap, 47 motor, 48 encoder, 251 discharge pipe 3, 281 control box, 282 development board, 501 pressing piece, 502 limit convex. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0032] See Figure 1 、 Figure 2 、 Figure 3 and Figure 4A modular water-cooled inverter includes a cover 1 for installing a control unit, an industrial control box 2 fixed to the rear end of the cover 1 with bolts and used to install a power unit and a control unit, the control unit includes a main control unit and a sub-control unit, a thermal conductive frame 3 for installing the main control unit is fixed to the front side of the industrial control box 2 with bolts, an insulating spacer is fixed to the rear side of the thermal conductive frame 3 with bolts, and a thermal conductive frame 4 for installing the sub-control unit is fixed to the rear end of the insulating spacer with bolts, a cooling box 5 is installed on the top front side of the industrial control box 2 through an installation mechanism, and a circulating cold liquid mechanism is provided in the cooling box 5;

[0033] The bottom front side of the cold box 5 is fixedly embedded with an insert 10 for sliding insertion into the heat conducting frame 3. The insert 10 is made of copper. A coil 11 is welded inside the insert 10. The coil 11 is made of copper. The two ends of the coil 11 are welded to a drain pipe 9. The drain pipe 9 is respectively welded to one side of the two cooling plates 6. The drain pipe 9 and the cooling plates 6 are connected to each other.

[0034] The middle side of the bottom of the cold box 5 is fixedly embedded with a second insert 16 for sliding insertion into the second heat conducting frame 4. The material of the second insert 16 is copper. The second coil 18 is welded inside the second insert 16. The material of the second coil 18 is copper. The two ends of the second coil 18 are welded to the second drain pipe 17. The second drain pipe 17 is respectively welded to one side of the two cooling plates 6. The second drain pipe 17 and the cooling plates 6 are connected to each other.

[0035] The rear side of the cold box 5 is bolted to the air cooling frame 24, which has a spiral coil 25 embedded in it. The inner wall of the spiral coil 25 is welded to an inner conductive layer 26, which is 1 mm thick and made of copper. The two ends of the spiral coil 25 are welded to the third drain pipe 251, which is welded to one side of the two cooling plates 6 respectively. The drain pipe 251 and the cooling plates 6 are connected to each other.

[0036] An air supply mechanism is provided on the top of the air cooling frame 24, which is used to control the external air to enter the air cooling frame 24 and contact the inner guide layer 26. A control and exhaust mechanism is provided at the bottom of the industrial control box 2 and at a position corresponding to the air cooling frame 24, which is used to adjust the air discharge volume in the industrial control box 2.

[0037] Through the setting of the air supply mechanism, the supplied air can be more effectively contacted with the inner guide layer 26, so that the inner guide layer 26 exchanges heat with the air, reduces the temperature of the air, and then reduces the temperature of the air blown into the industrial control box 2, effectively cooling the interior of the industrial control box 2 and the power unit; through the setting of the control and exhaust mechanism, the size of the exhaust port can be adjusted, thereby adjusting the air discharge volume in the industrial control box 2.

[0038] A control mechanism is provided on the air supply mechanism, which is used to control the operating speed of the circulating cold liquid mechanism and the supply of external air to the air supply mechanism according to the temperature on the temperature conducting frame 1 3 and the temperature conducting frame 2 4 and the temperature inside the industrial control box 2, and is also used to control the exhaust control mechanism to adjust the air discharge volume.

[0039] See Figure 1 、 Figure 2 、 Figure 3 The circulating cold liquid mechanism includes cooling plates 6 embedded in the left and right sides of the cold box 5. The cold box 5 is made of ABS plastic, and the cooling plates 6 are made of copper. The drain pipe 1 9, the drain pipe 2 17, and the drain pipe 3 251 are respectively welded and connected to the cooling plates 6 on both sides.

[0040] An installation groove is provided in the middle side of the cold box 5, and a circulating pump 12 is fixed by screws in the installation groove. The circulating pump 12 is a ceramic circulating pump driven by a micro servo motor. The liquid inlet end flange of the circulating pump 12 is connected to the solenoid valve 13, and the discharge end flange of the solenoid valve 13 is connected to the tee. The top flange of the tee is connected to the accumulator 14, and the left end of the tee is flange-connected to the cooling plate 6 on one side; the liquid discharge end flange of the circulating pump 12 is connected to the tee, and the top flange of the tee is connected to the accumulator 14, and the right end flange of the tee is connected to the solenoid valve 13. The discharge end of the solenoid valve 13 is flange-connected to the cooling plate 6 on the other side. The cover plate 15 is fixed by screws on the top of the installation groove;

[0041] When the solenoid valves 13 on both sides are opened, the operation of the circulating pump 12 will cause the deionized water in the cooling disks 6 on both sides to be circulated and discharged; the mode of controlling the shutdown of the circulating cold liquid mechanism is: first control the solenoid valve 13 on the right to close the valve, delay 0.5 seconds and control the circulation pump 12 to shut down, and delay 1 second and control the solenoid valve 13 on the left to close the valve. In this process, the expansion of the cylinder caused by the closing of the valves at both ends of the circulation pump 12 can be avoided, and in this process, part of the deionized water is pressurized and stored in the accumulator 14. When the solenoid valves 13 on both sides are opened, the deionized water in the accumulator 14 is instantly replenished into the circulating water circuit, thereby making up for the lack of water supply when the circulation pump 12 is initially started.

[0042] The front end of the cooling plate 6 is evenly bolted to the thermal conductive plate 19 in the horizontal direction. The material of the thermal conductive plate 19 is copper. The thermal conductive plate 19 is embedded in the cold box 5. The front end of the thermal conductive plate 19 is integrally provided with a mounting plate 20. The front end of the mounting plate 20 is bolted to the cold end of the semiconductor refrigerator 21. The hot end of the semiconductor refrigerator 21 is screwed to the heat dissipation fin 22. The heat dissipation fin 22 is a square porous fin plate made of aluminum; the front end of the heat dissipation fin 22 is bolted to the heat dissipation fan 23, and the heat dissipation fan 23 is a stepper motor driven heat dissipation fan.

[0043] When the heat dissipation fan 23 is running, the air flow rate in the inner hole of the heat dissipation fin 22 is accelerated. Since the heat dissipation fin 22 conducts the heat of the hot end of the semiconductor refrigerator 21 to its upper part, the rapid flow of air causes the heat of the heat dissipation fin 22 and the hot end of the semiconductor refrigerator 21 to be quickly dissipated, thereby causing the cold end of the semiconductor refrigerator 21 to produce cold. The coldness is concentrated through the mounting plate 20 and then guided to the cooling plate 6 through the thermal conductive plate 19.

[0044] By adjusting the operating speed of the cooling fan 23, the cooling speed of the cooling disk 6 is adjusted, and by adjusting the operating speed of the circulation pump 12, the heat exchange speed of the coil 11, the coil 2 18 and the spiral coil 25 is adjusted.

[0045] When the deionized water in the circulating cold liquid mechanism needs to be replaced, the accumulators 14 on both sides can be removed, and the solenoid valve 13 on one side can be closed and the solenoid valve 13 on the other side can be opened. The upper ports of the three-way valves on both sides are tightly inserted into the hoses, one of which is connected to the drainage end of the micro submersible pump, and the micro submersible pump is inserted into the bucket filled with deionized water. The micro submersible pump is started to discharge the deionized water in the circulating cold liquid mechanism and replenish it with new deionized water. After replenishment is completed, the accumulator 14 can be reinstalled on the three-way valve.

[0046] See Figure 6 、 Figure 8 and Figure 9 The cooling plate 6 is a square closed plate structure with a front and rear thickness of 3 cm. The cooling plate 6 is made of copper. The upper and lower parts of the cooling plate 6 are uniformly and integrally provided with partition bars 7. The adjacent partition bars 7 are staggered up and down to form a winding space. The distance between the end of each partition bar 7 and the side wall of the cooling plate 6 is 5 mm, and the distance between the adjacent partition bars 7 is 5 mm. Baffles 8 are uniformly and integrally provided vertically on both sides of the partition bars 7. The lateral distance between the baffles 8 on the adjacent partition bars 7 and the partition bars 7 is 0.5 mm.

[0047] Under such a setting, after the deionized water enters the cooling plate 6 from one side, it passes through the cooling plate 6 in a winding state due to the restriction of the partition 7, and is blocked by the baffle 8, so that the deionized water can more effectively and fully contact the cooling plate 6, the partition 7 and the baffle 8, thereby better allowing the deionized water to be heat exchanged.

[0048] The temperature sensing piece 1 and the temperature sensing piece 2 are respectively fixed with screws on the temperature conducting frame piece 1 3 and the temperature conducting frame piece 2 4 . The temperature sensing piece 1 and the temperature sensing piece 2 are respectively used to measure the temperature on the temperature conducting frame piece 1 3 and the temperature conducting frame piece 2 4 .

[0049] See Figure 1 、 Figure 2 、 Figure 3 and Figure 11The air supply mechanism includes a top cover 28 flange-connected to the upper port of the air cooling frame 24, with connecting rods 29 uniformly welded circumferentially inside the top cover 28 and shields 30 uniformly arranged vertically between the connecting rods 29, with the outermost edge of the shield 30 and the inner guide layer 26 spaced 0.5 mm apart; wherein, the topmost shield 30 and the connecting rod 29 are integrally formed, with the shields 30 welded to the fixing rods, and an exhaust pipe 34 integrally provided on the top of the top cover 28, with an air flow velocity sensor 35 screwed to the front side of the exhaust pipe 34;

[0050] By providing the air flow velocity sensor 35 , the air flow velocity in the discharge pipe 34 can be detected in real time, thereby providing a basis for replacing the air filter layer 39 .

[0051] By setting the baffle 30, the lower row of air can be effectively diverted to the area close to the inner wall of the inner guide layer 26, so that the air can effectively contact the inner guide layer 26. When the cooled water passes through the spiral coil 25, the coldness is transferred to the inner guide layer 26, and the air is heat exchanged under air contact, thereby reducing the temperature of the lower row of air.

[0052] A filter box 36 is integrally provided at the top opening of the discharge pipe 34. An inner support frame 37 is slidably inserted into the filter box 36. The inner support frame 37 is a square frame. A receiving mesh plate 38 is fused into the inner support frame 37. An air filter layer 39 is slidably inserted into the inner support frame 37 and located above the receiving mesh plate 38. The thickness of the air filter layer 39 is 1 cm. The air filter layer 39 is made of synthetic fiber felt with a filtration accuracy of 60 microns, which can effectively filter the external air, thereby making the air used for cooling more clean.

[0053] The top of the filter cartridge 36 is locked with a screw cap 40. The inner top of the screw cap 40 is bonded to a rubber ring using resin glue. When the screw cap 40 is locked onto the filter cartridge 36, the rubber ring is pressed against the top of the filter cartridge 36 by the screw cap 40. The top flange of the screw cap 40 is connected to the second solenoid valve 41. The air inlet flange of the second solenoid valve 41 is connected to the pipe 42. The pipe 42 is fitted with a branch pipe 43 through an interference fit. The top of the branch pipe 43 is integrally provided with a main input pipe 44. The branch pipes 43 and the main input pipe 44 are made of rubber hose with steel wire inner ribs. The underside of the main input pipe 44 can be provided with a branch pipe 43 according to the position of the inverter, thereby providing air supply to a row of inverters.

[0054] One end of the main input pipe 44 is connected to a permanent pressurized ventilation pipe in the factory, and the other end of the main input pipe 44 is sealed with a rubber plug.

[0055] It is worth noting that the air in the permanent pressurized ventilation ducts in the factory will first undergo preliminary air filtration before being pressurized and discharged by external extraction equipment and mid-section auxiliary pressurization equipment. This can prevent most dust and impurities from being discharged into the pressurized ventilation ducts. Introducing the pressurized ventilation ducts in the power room into the densely populated electronic control components for air cooling is mainly to make more full use of the pressurized air in the ventilation ducts and to achieve cleaner air cooling and heat dissipation. Compared with installing a cooling fan on the electrical box, it is another better choice.

[0056] When the solenoid valve 41 is opened, the pressurized air in the pressurized ventilation pipe is further filtered by the air filter layer 39 and discharged into the top cover 28. The air is then guided to the area close to the inner wall of the inner guide layer 26 through the vertically arranged baffle 30, thereby effectively allowing the air to contact the inner guide layer 26. When the cooled water passes through the spiral coil 25, the coldness is transferred to the inner guide layer 26, and the air is heat exchanged under air contact, thereby reducing the temperature of the discharged air.

[0057] See Figure 3 A connecting rod 31 is connected to the shield 30 , a fixing bracket 32 ​​is connected to the bottom of the connecting rod 31 , and a temperature sensor 33 is provided at the bottom of the fixing bracket 32 ​​.

[0058] See Figure 1 、 Figure 2 The installation mechanism includes a pressing piece 501 fixed by bolts on the left and right sides of the cold production box 5. The material of the pressing piece 501 is tungsten-vanadium alloy and has good elastic restoring force. The left and right sides of the industrial control box 2 are integrally provided with a limiting protrusion 502. The pressing piece 501 is provided with a press-in groove and the press-in groove is pressed into the limiting protrusion 502, and the lower end of the pressing piece 501 is tilted; the upper end of the industrial control box 2 is provided with an insertion port and the lower end of the air-cooling frame 24 is inserted into the insertion port. The bottom outer edge of the air-cooling frame 24 and the outer edge of the insertion port are provided with an annular groove, and a sealing ring 27 is pressed tightly in the annular groove.

[0059] When the pressing piece 501 drives the pressing groove to fit into the limiting protrusion 502, its supporting force satisfies: the annular grooves at the upper and lower positions effectively compress the sealing ring 27, thereby ensuring the effective docking of the industrial control box 2 and the air cooling frame 24; and also satisfies the requirements of allowing the thermal conductive frame piece 1 3 to effectively contact the insert piece 1 10, and effectively allowing the thermal conductive frame piece 2 4 to effectively contact the insert piece 2 16.

[0060] It is worth mentioning that before inserting the insert piece 10 into the thermal conductive frame piece 1 3 and inserting the insert piece 2 16 into the thermal conductive frame piece 2 4 , thermal conductive silicone can be applied to the outer surfaces of the insert piece 10 and insert piece 2 16 , so that after inserting the insert piece 10 into the thermal conductive frame piece 1 3 and inserting the insert piece 2 16 into the thermal conductive frame piece 2 4 , the heat transfer effect can be effectively guaranteed.

[0061] Through the setting of the installation mechanism, the water cooling facilities on the inverter can be detached or installed from the industrial control box 2 more quickly, thereby facilitating the replacement of the water cooling facilities or batch assembly. Therefore, under such a modular design, when the water cooling facilities need to be replaced, they can be replaced quickly.

[0062] See Figure 1 、 Figure 2 and Figure 3 The control mechanism includes a continuous cover 45 which is fixed to the bottom of the industrial control box 2 with bolts and corresponds to the lower port position of the air-cooling frame 24. A flap 46 is rotatably arranged in the continuous cover 45. The flap 46 is a flap structure with a central axis set in the center. The front and rear sides of the flap 46 are provided with round chamfers, and the front and rear sides of the flap 46 slide in contact with the inner wall of the continuous cover 45. Mounting grooves are provided on the left and right sides of the continuous cover 45. Bearings are inserted into the mounting grooves with interference fit, and the inner rings of the bearings are inserted into the two ends of the central axis with interference fit; the motor 47 is fixed to the right side of the continuous cover 45 with screws. The motor 47 is a stepping motor. The rotor shaft of the motor 47 passes through the air-cooling frame 24 and is connected to the center position of the right end of the central axis of the flap 46 with an interference key. The encoder 48 is fixed to the left side of the continuous cover 45 with screws. The moving shaft of the encoder 48 passes through the continuous cover 45 and is interference connected to the center position of the left end of the central axis of the flap 46.

[0063] When the motor 47 is running, it drives the flap 46 to flip, thereby changing the gap area between the flap 46 and the inner wall of the continuous cover 45, thereby changing the amount of air discharged downward; and under the influence of the obstruction of the flap 46, when the flip angle of the flap 46 changes, the discharge direction of the downward air is also changed.

[0064] See Figure 1 、 Figure 2 、 Figure 3 、 Figure 12 and Figure 13 , the control mechanism includes a control box 281 fixed to the air supply mechanism by bolts, and a development board 282 fixed to the control box 281 by insulating pads and screws;

[0065] The development board 282 includes a temperature signal receiving module 1, a temperature signal receiving module 2, a temperature signal receiving module 3, a flow rate signal receiving module and a pulse signal receiving module;

[0066] The signal access pin of the temperature signal receiving module one is connected to the signal line of the temperature sensing piece one. The temperature signal receiving module one is used to receive the temperature information emitted by the temperature sensing piece one in real time and convert it into a temperature value. The temperature of the temperature conducting frame piece one 3 is obtained by the temperature signal receiving module one; the signal access pin of the temperature signal receiving module two is connected to the signal line of the temperature sensing piece two. The temperature signal receiving module two is used to receive the temperature information emitted by the temperature sensing piece two in real time and convert it into a temperature value. The temperature of the temperature conducting frame piece two 4 is obtained by the temperature signal receiving module two; the signal access pin of the temperature signal receiving module three is connected to the signal line of the temperature sensor. The temperature signal receiving module three is used to receive the temperature information emitted by the temperature sensor 33 in real time and convert it into a temperature value. The air temperature in the industrial control box 2 is obtained by the temperature signal receiving module three; the signal access pin of the flow rate signal receiving module is connected to the signal line of the air flow rate sensor 35. The flow rate signal receiving module is used to receive the air flow rate signal emitted by the air flow rate sensor 35 in real time and convert it into an air flow rate value; the signal input pin of the pulse signal receiving module is connected to the transmission line of the encoder 48. The pulse signal receiving module is used to receive the angle pulse signal input by the encoder 48 in real time and convert it into an angle value;

[0067] The temperature signal receiving module 1, the temperature signal receiving module 2, the temperature signal receiving module 3, the flow rate signal receiving module and the pulse signal receiving module are connected to the analysis and processing module, and the analysis and processing module is connected to the speed control module 1, the speed control module 2, the relay control module 1, the relay control module 2, the relay control module 3, the relay control module 4, the steering digital control module and the signal feedback module;

[0068] The analysis and processing module analyzes the temperature values ​​input by the temperature signal receiving module 1, the temperature signal receiving module 2 and the temperature signal receiving module 3 in real time, and issues operation instructions to the speed control input module 1, the speed control input module 2, the relay control input module 1, the relay control input module 2 and the relay control input module 3;

[0069] The analysis and processing mode of the analysis and processing module is: when the temperature value of one of the inputs of the temperature signal receiving module 1, the temperature signal receiving module 2 and the temperature signal receiving module 3 exceeds 65°C, the speed control module is instructed to execute a speed of 600r / min, the speed control module 2 is instructed to execute a speed of 250r / min, and the relay control module 1 and the relay control module 2 are instructed to keep on; and when the temperature values ​​of the temperature signal receiving module 1, the temperature signal receiving module 2 and the temperature signal receiving module 3 are maintained at 30-65°C, the speed control module is instructed to execute a speed of 100r / min, the speed control module 2 is instructed to execute a speed of 110r / min, and the relay control module 1, the relay control module 2 and the relay control module 3 are instructed to keep on. command; and when the temperature values ​​of the temperature signal receiving module 1, the temperature signal receiving module 2 and the temperature signal receiving module 3 are all maintained at 25-65°C, an instruction to execute the speed of 100r / min is issued to the speed control module, an instruction to execute 110r / min is issued to the speed control module 2, and an instruction to keep on is issued to the relay control module 1, the relay control module 2 and the relay control module 3; and when the temperature values ​​of the temperature signal receiving module 1, the temperature signal receiving module 2 and the temperature signal receiving module 3 are all maintained below 25°C, an instruction to execute stop operation is issued to the speed control module 1, an instruction to execute 80r / min is issued to the speed control module 2, an instruction to keep on is issued to the relay control module 1 and the relay control module 2, and an instruction to stop operation is issued to the relay control module 3;

[0070] When the analysis and processing module does not receive the external control signal, it sends a command to the relay control module 4 to keep it open;

[0071] If the value sent by the flow velocity signal receiving module remains at or above 2.0 m / s, a command to maintain the open state is issued to relay control module 4. If the value sent by the flow velocity signal receiving module remains below 2.0 m / s, a command to close the relay control module 4 is issued, and an alarm command is issued to the signal feedback module. The signal feedback module is connected to an external computer via a 1:8 serial signal line, and the external computer monitors the air flow velocity in real time. When an alarm command is issued, the management personnel can be reminded to replace the air filter layer 39 or check the ventilation status of the pressurized ventilation pipe. In addition, the signal feedback module also feeds the temperature values ​​input by temperature signal receiving modules 1, 2, and 3, as well as the control commands issued, to the external computer for display and log storage in real time.

[0072] The analysis and processing module is connected to the signal programming module, which is connected to the wired signal receiving module; the wired signal receiving module is used to receive external wired control signals, and the signal programming module is used to classify the wired control signals in real time and input them into the analysis and processing module;

[0073] Under the action of the signal encoding module, the analysis and processing module is accurately matched to each control and transmission module according to the number type of each signal.

[0074] The analysis and processing module also receives the control signals input by the signal programming module in real time, thereby issuing control instructions to the speed control module 1, speed control module 2, relay control module 1, relay control module 2, relay control module 3, relay control module 4 and steering digital control module;

[0075] It is worth mentioning that the signal input by the signal programming module is a priority execution instruction. When the analysis and processing module receives the priority execution instruction, it will send the original instruction to stop running to the corresponding control and transmission module and issue the priority execution instruction. Therefore, the circulating cold liquid mechanism, air supply mechanism and control and exhaust mechanism can be temporarily started and stopped.

[0076] Speed ​​control module 1, speed control module 2, relay control module 1, relay control module 2 and relay control module 3 are used to control the operation of the circulating coolant mechanism; relay control module 4 is used to control the operation of the air supply mechanism; and the steering control module is used to control the operation of the exhaust mechanism.

[0077] Among them, the motor power supply controlled end of the cooling fan 23 is connected to the power supply control input end of the driver 1 through a cable, the main power input end of the driver 1 is connected to the external power supply through a cable, and the signal output pin of the speed control module 1 is connected to the signal input end of the driver 1 through a signal line; the motor power supply controlled end of the circulating pump 12 is connected to the power supply control input end of the driver 2 through a cable, the main power input end of the driver 2 is connected to the external power supply through a cable, and the signal output pin of the speed control module 2 is connected to the signal input end of the driver 2 through a signal line; the relay control module 1, the relay control module 2, and the relay control module The signal output pins of block three and relay control module four are connected to the various signal input terminals of the peripheral integrated relay through signal lines. The main power input terminal of the integrated relay is connected to the external power supply through a cable. The various electrical control output terminals of the integrated relay are connected to the potential input terminals of solenoid valve one 13 and solenoid valve two 41 and the power line of the semiconductor refrigerator 21 through cables. Relay control module one and relay control module two are used to control the opening and closing of solenoid valve one 13 on both sides. Relay control module three is used to control the shutdown of the semiconductor refrigerator 21. Relay control module four is used to control the opening and closing of solenoid valve two 41.

[0078] The power controlled end of motor 47 is connected to the power control input end of driver three through a cable, the main power input end of driver three is connected to the external power supply through a cable, and the signal output pin of the steering CNC output module is connected to the signal input end of driver three through a signal line.

[0079] After the external computer sends the steering speed control instruction information to the wired signal receiving module, it is input into the analysis and processing module through the signal programming module and then sent to the steering speed control input module, thereby controlling the motor 47 to operate according to the corresponding steering speed control information. By analyzing the angle pulse signal input in real time by the pulse signal receiving module, the corresponding speed change value Q and direction information are obtained; if the obtained angle change value is E, the speed change is E / 360, where E is a positive number, it represents a clockwise change of the rotor shaft of the motor 47, and if E is a negative number, it represents a counterclockwise change of the rotor shaft of the motor 47. The speed change value Q obtained by analysis is compared with the steering speed control instruction information input in real time. If there is a speed difference, the analysis and processing module uses the speed in the steering speed control instruction information input in real time as a reference to calculate the speed difference U between the two, and then uses Q as the target direction to operate at the speed U, thereby effectively ensuring the accuracy of controlling the flap 46 to flip a certain angle, so that the lower air output can be effectively controlled when the inverter is used at different frequencies.

[0080] When the analysis and processing module issues a closing command to the relay control input module four, it will issue a horizontal recovery command to the steering control input module, that is, it will run in the reverse direction according to the actual operating speed value of the motor two 47, and the encoder 48 will monitor and feedback the actual operating angle in real time, and adjust the speed in the above manner until the two sides of the flap 46 contact the two sides of the inner wall of the row cover 45, thereby preventing external dust and impurities from entering the industrial control box 2.

[0081] The working principle of this embodiment is as follows:

[0082] The main control unit and sub-control unit are supported by the thermal conductive frame 1 3 and the thermal conductive frame 2 4, and the circulating cold liquid mechanism adopts a plug-in cooling device, which effectively transfers the cooling temperature generated by the cooling plate to the thermal conductive frame 1 3 and the thermal conductive frame 2 4 through the cooling plate with an internal winding path structure, thereby effectively removing the heat from the main control unit and the sub-control unit;

[0083] Under the setting of the air supply mechanism, the circulating cold liquid mechanism and the control and exhaust mechanism, the coldness generated by the circulating cold liquid mechanism can be effectively exchanged with the air, and the heat-exchanged air is blown into the industrial control box 2 to effectively cool the main control unit, sub-control unit and power unit;

[0084] Under the setting of the control mechanism, the operating speed of the circulating cold liquid mechanism will automatically increase as the operating temperature increases, thereby adaptively improving the heat exchange effect and meeting the adaptive cooling switching under high and low frequency inverter operating modes.

[0085] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A modular water-cooled frequency converter, comprising a cover (1) for mounting a control unit, and an industrial control box (2) mounted at one end of the cover (1) for mounting a power unit and a control unit, wherein the control unit comprises a main control unit and a sub-control unit, and is characterized in that: A first heat conducting frame piece (3) for mounting a main control unit is fixedly provided on one side of the industrial control box (2), a second heat conducting frame piece (4) for mounting a sub-control unit is installed on one side of the first heat conducting frame piece (3), a cold generating box (5) is installed on one side of the top of the industrial control box (2) through a mounting mechanism, and a circulating cold liquid mechanism is provided in the cold generating box (5); A plug-in piece (10) for inserting into a heat conducting frame piece (3) is provided on one side of the bottom of the cold production box (5), a coil (11) is provided in the plug-in piece (10), and both ends of the coil (11) are connected to the circulating cold liquid mechanism through a drain pipe (9); The bottom middle side of the cold box (5) is provided with a second insert (16) for inserting into the second heat conducting frame (4), and the second insert (16) is provided with a second coil (18), and both ends of the second coil (18) are connected to the circulating cold liquid mechanism through a second drain pipe (17); An air cooling frame (24) is provided on one side of the cold production box (5), a spiral coil (25) is provided in the air cooling frame (24), an inner guide layer (26) is provided on the inner wall of the spiral coil (25), and both ends of the spiral coil (25) are connected to the circulating cold liquid mechanism through a third drain pipe (251); The top of the air cooling frame (24) is provided with an air supply mechanism, which is used to control the external air to enter the air cooling frame (24) and contact the inner guide layer (26); the bottom of the industrial control box (2) and the position corresponding to the air cooling frame (24) are provided with a control and exhaust mechanism, which is used to adjust the air exhaust volume in the industrial control box (2); The air supply mechanism is provided with a control mechanism, which is used to control the operating speed of the circulating cold liquid mechanism and the supply of external air to the air supply mechanism according to the temperature on the first heat conducting frame (3) and the second heat conducting frame (4) and the temperature in the industrial control box (2), and is also used to control the exhaust control mechanism to adjust the air exhaust volume.

2. The modular water-cooled inverter according to claim 1, characterized in that: The circulating cold liquid mechanism includes cooling plates (6) arranged on both sides of the cold production box (5); the drain pipe 1 (9), drain pipe 2 (17) and drain pipe 3 (251) are respectively connected to the cooling plates (6) on both sides; A mounting groove is provided in the middle of the cold box (5), and a circulating pump (12) is installed in the mounting groove. The liquid inlet end of the circulating pump (12) is connected to a solenoid valve (13), and the discharge end of the solenoid valve (13) is connected to a tee, the top of the tee is connected to an accumulator (14), and the other end of the tee is connected to the cooling disk (6) on one side; the liquid discharge end of the circulating pump (12) is connected to a tee, the top of the tee is connected to the accumulator (14), and the other end of the tee is connected to a solenoid valve (13), and the discharge end of the solenoid valve (13) is connected to the cooling disk (6) on the other side. A cover plate (15) is installed on the top of the mounting groove; The front end of the cooling plate (6) is provided with a heat conducting plate (19), the front end of the heat conducting plate (19) is provided with a mounting plate (20), a semiconductor cooler (21) is mounted on the mounting plate (20), a heat dissipating fin plate (22) is mounted on the hot end of the semiconductor cooler (21), and a heat dissipating fin plate (22) is mounted on the front end of the heat dissipating fin plate (22).

3. The modular water-cooled inverter according to claim 2, characterized in that: The cooling plate (6) is provided with spacers (7) uniformly arranged in the transverse direction, and the adjacent spacers (7) are staggered up and down. Blocking pieces (8) are uniformly arranged vertically on both sides of the spacers (7), and the transverse distance between the blocking pieces (8) and the spacers (7) on adjacent spacers (7) does not exceed 0.5 mm.

4. The modular water-cooled inverter according to claim 3, characterized in that: The first heat conducting frame piece (3) and the second heat conducting frame piece (4) are provided with a temperature sensing piece (1) and a temperature sensing piece (2) respectively. The first heat conducting frame piece (3) and the second heat conducting frame piece (4) are used to measure the temperature on the first heat conducting frame piece (3) and the second heat conducting frame piece (4) respectively.

5. The modular water-cooled inverter according to claim 4, characterized in that: The air supply mechanism comprises a top cover (28) arranged at an upper port of the air cooling frame (24), connecting rods (29) are evenly arranged in a circumferential direction inside the top cover (28), and shields (30) are arranged between the connecting rods (29), a discharge pipe (34) is connected to the top of the top cover (28), and an air flow velocity sensor (35) is arranged on one side of the discharge pipe (34); A filter box (36) is provided at the top of the discharge pipe (34), an inner support frame (37) is provided in the filter box (36), a receiving mesh plate (38) is provided in the inner support frame (37), and an air filter layer (39) is provided in the inner support frame (37) and located above the receiving mesh plate (38); The upper end of the filter box (36) is locked with a screw cap (40), the top end of the screw cap (40) is connected to a second solenoid valve (41), the air inlet end of the second solenoid valve (41) is connected to a connecting pipe (42), the connecting pipe (42) is connected to a branch connecting pipe (43), and the top end of the branch connecting pipe (43) is provided with a main input pipe (44).

6. The modular water-cooled inverter according to claim 5, characterized in that: A connecting rod (31) is connected inside the baffle (30), a fixing frame (32) is connected to the bottom of the connecting rod (31), and a temperature sensor (33) is provided at the bottom of the fixing frame (32).

7. The modular water-cooled inverter according to claim 6, characterized in that: The mounting mechanism includes pressing plates (501) arranged on both sides of the cold production box (5), and limiting protrusions (502) are arranged on both sides of the industrial control box (2). A pressing groove is provided on the pressing plate (501), and the pressing groove is inserted into the limiting protrusion (502). The upper end of the industrial control box (2) is provided with an insertion port, and the lower end of the air cooling frame (24) is inserted into the insertion port. The outer edge of the bottom of the air cooling frame (24) and the outer edge of the insertion port are provided with an annular groove, and a sealing ring (27) is pressed tightly in the annular groove.

8. The modular water-cooled inverter according to claim 7, characterized in that: The control and exhaust mechanism includes a continuous cover (45) arranged at the bottom of the industrial control box (2) and corresponding to the lower port position of the air-cooling frame (24), a flap (46) is rotatably arranged in the continuous cover (45), a motor (47) is arranged on one side of the continuous cover (45), a rotor shaft of the motor (47) passes through the air-cooling frame (24) and is connected to the center position of one end of the central axis of the flap (46), an encoder (48) is arranged on the other side of the continuous cover (45), and a moving shaft of the encoder (48) passes through the continuous cover (45) and is connected to the center position of the other end of the central axis of the flap (46).

9. The modular water-cooled inverter according to claim 8, characterized in that: The control mechanism comprises a control box (281) arranged on the air supply mechanism, wherein a development board (282) is arranged in the control box (281); The development board (282) includes a temperature signal receiving module 1, a temperature signal receiving module 2, a temperature signal receiving module 3, a flow rate signal receiving module and a pulse signal receiving module; The temperature signal receiving module 1 is used to receive the temperature information sent by the temperature sensing piece 1 in real time and convert it into a temperature value; the temperature signal receiving module 2 is used to receive the temperature information sent by the temperature sensing piece 2 in real time and convert it into a temperature value; the temperature signal receiving module 3 is used to receive the temperature information sent by the temperature sensor (33) in real time and convert it into a temperature value; the flow rate signal receiving module is used to receive the air flow rate signal sent by the air flow rate sensor (35) in real time and convert it into an air flow rate value; the pulse signal receiving module is used to receive the angle pulse signal input by the encoder (48) in real time and convert it into an angle value; The temperature signal receiving module 1, the temperature signal receiving module 2, the temperature signal receiving module 3, the flow rate signal receiving module and the pulse signal receiving module are connected to the analysis and processing module, and the analysis and processing module is connected to the speed control module 1, the speed control module 2, the relay control module 1, the relay control module 2, the relay control module 3, the relay control module 4, the steering digital control module and the signal feedback module; The analysis and processing module analyzes the temperature values ​​input by the temperature signal receiving module 1, the temperature signal receiving module 2 and the temperature signal receiving module 3 in real time, and issues operation instructions to the speed control input module 1, the speed control input module 2, the relay control input module 1, the relay control input module 2 and the relay control input module 3; The analysis and processing module is connected to the signal programming module, which is connected to the wired signal receiving module; the wired signal receiving module is used to receive external wired control signals, and the signal programming module is used to classify the wired control signals in real time and input them into the analysis and processing module; The analysis and processing module also receives the control signal input by the signal encoding module in real time, thereby issuing control instructions to the speed control module 1, speed control module 2, relay control module 1, relay control module 2, relay control module 3 and steering digital control module; The speed control module 1, speed control module 2, relay control module 1, relay control module 2 and relay control module 3 are used to control the operation of the circulating cold liquid mechanism; the relay control module 4 is used to control the operation of the air supply mechanism; the steering digital control module is used to control the operation of the exhaust mechanism.

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