An air-water cooling device for a high-voltage frequency converter

Abstract

The present invention relates to the technical field of heat dissipation of high-voltage frequency conversion cabinets, and particularly relates to an air-water cooling device for high-voltage frequency converters. It includes a heat exchange body and a frequency conversion cabinet. The heat exchange body is fixedly connected and communicated with an air inlet duct and an air outlet duct. The air inlet duct is fixedly connected and communicated with a connection shell, and the connection shell is fixedly connected and communicated with the frequency conversion cabinet. Temperature monitoring devices are evenly distributed in the frequency conversion cabinet. A sealing mechanism is evenly installed at the connection between the frequency conversion cabinet and the connection shell. The sealing mechanism is used to change the position of the connection between the frequency conversion cabinet and the connection shell according to the temperature of different parts of the frequency conversion cabinet, and focuses on dissipating heat from the positions where the frequency conversion cabinet generates serious heat. When the temperature at some positions inside the frequency conversion cabinet abnormally rises, the present invention closes the sealing mechanisms at other positions, thereby enhancing the heat dissipation efficiency at this position of the frequency conversion cabinet, more easily reducing the temperature peak value of the frequency conversion cabinet, and achieving a better temperature equalization control effect.

Description

Technical Field

[0001] The present invention relates to the technical field of high-voltage frequency conversion cabinet heat dissipation, and particularly relates to an air-water cooling device for a high-voltage frequency converter. Background Art

[0002] As a common cooling device for high-voltage frequency conversion cabinets, the air-water cooling device can be directly installed in a newly built high-voltage frequency conversion system or adapted to existing equipment through simple modification. The air-water cooling device cools the inside of the high-voltage frequency conversion cabinet by pumping the hot air inside the high-voltage frequency conversion cabinet into the heat exchange mechanism, and then discharges the cooled air back into the room where the high-voltage frequency conversion cabinet is located, so as to achieve the overall temperature control of the high-voltage frequency conversion cabinet body and the computer room environment. An existing air-water cooling device usually needs to handle the heat dissipation requirements of multiple high-voltage frequency conversion cabinets at the same time. However, when the temperature of the electrical components in one of the high-voltage frequency conversion cabinets rises abnormally while the temperature of the electrical components in other high-voltage frequency conversion cabinets remains normal, the existing air-water cooling device cannot specifically strengthen the heat dissipation of the high-temperature high-voltage frequency conversion cabinet, but can only continuously cool all the high-voltage frequency conversion cabinets it is responsible for in an average manner. Although this undifferentiated heat dissipation mode has the function of dissipating heat from the electrical components in the high-voltage frequency conversion cabinet, it is difficult to achieve a better temperature equalization control effect, resulting in limited comprehensive cooling efficiency of the system and unable to synchronously reduce the temperatures of each cabinet to a more ideal low value range. Summary of the Invention

[0003] In order to overcome the defect that the existing air-water cooling device cannot specifically strengthen the heat dissipation of the high-temperature high-voltage frequency conversion cabinet and can only continuously cool all the high-voltage frequency conversion cabinets it is responsible for in an average manner, an air-water cooling device for a high-voltage frequency converter is provided.

[0004] The technical solution is as follows: An air-water cooling device for a high-voltage frequency converter includes a heat exchange body and a frequency conversion cabinet. The heat exchange body is fixedly connected and communicated with an air inlet duct and an air outlet duct. The air inlet duct is fixedly connected and communicated with a connection shell, and the connection shell is fixedly connected and communicated with the frequency conversion cabinet. Temperature monitoring devices are evenly distributed inside the frequency conversion cabinet. Sealing mechanisms are evenly installed at the connection between the frequency conversion cabinet and the connection shell. The sealing mechanisms are used to change the position of the connection between the frequency conversion cabinet and the connection shell according to the temperature of different parts of the frequency conversion cabinet, and specifically dissipate heat from the positions where the frequency conversion cabinet generates a large amount of heat.

[0005] Further, the plugging mechanism includes fixed plates symmetrically distributed. The fixed plates are rotatably connected to the frequency conversion cabinet. The fixed plates are fixedly connected with limiting plates. Rotating plates are evenly distributed on the fixed plates. The fixed plates are in limit rotation connection with the rotating plates close to the limiting plates, and a torsion spring is fixedly connected between the two. Adjacent two rotating plates are in limit rotation connection, and a torsion spring is fixedly connected between the two. The limiting plate is used for limiting the rotating plate on the adjacent fixed plate that is farthest from itself. A wind guiding gap is arranged between adjacent two rotating plates. The frequency conversion cabinet is provided with a power assembly for driving the symmetrically distributed fixed plates to rotate and open simultaneously.

[0006] Further, the power assembly includes a servo motor. The servo motor is fixedly connected to the frequency conversion cabinet. Symmetrically distributed rotating gears are rotatably connected to the frequency conversion cabinet near the servo motor. The symmetrically distributed rotating gears are meshed with each other. The output shaft of the servo motor is fixedly connected with the adjacent rotating gear. The rotating gear is rotatably connected with a first pulley, and there is damping between the two. The fixed plate is fixedly connected with a second pulley. The second pulley is rotatably connected to the frequency conversion cabinet. The first pulley and the adjacent second pulley are driven by a belt. A dragging assembly for driving the rotating plates on the adjacent fixed plates to rotate is arranged on the rotating gear, so that the fixed plate and the rotating plates thereon form a cylindrical structure.

[0007] Further, the dragging assembly includes symmetrically distributed winding rollers. The winding rollers are fixedly connected to the adjacent rotating gears. The winding rollers are wound with dragging ropes. The dragging ropes penetrate through the adjacent fixed plates, the adjacent second pulleys and the frequency conversion cabinet. The dragging ropes are fixedly connected with the rotating plates on the adjacent plugging mechanism that are farthest from the limiting plates.

[0008] Further, wind guiding strips are fixedly connected to the rotating plates. The wind guiding strips correspond to the wind guiding gaps between adjacent two rotating plates one by one. The wind guiding strips are used for plugging the corresponding wind guiding gaps.

[0009] Further, one side of the wind guiding strip away from the adjacent rotating plate has flexibility.

[0010] Further, a micro motor is fixedly connected to one of the rotating plates. The output shaft of the micro motor is fixedly connected with a wind guiding head. The wind guiding head is rotatably connected to the adjacent rotating plate.

[0011] Further, the flow area of the wind guiding head gradually decreases from the side close to the adjacent micro motor to the side far from the adjacent micro motor.

[0012] Further, it further includes symmetrically distributed electric rotating shafts, and the symmetrically distributed electric rotating shafts are fixedly connected to the connection shell. The electric rotating shafts are fixedly connected with air distribution plates, and the symmetrically distributed air distribution plates together divide the communication part between the connection shell and the air inlet duct into multiple flow channels.

[0013] Further, evenly distributed first air guiding heads are fixedly connected inside the air inlet duct, and second air guiding heads are fixedly connected inside the connection shell at intervals. The number of the second air guiding heads is the same as that of the first air guiding heads. The first air guiding heads and the adjacent second air guiding heads are connected through hoses. At least one fixing plate corresponds to at least one second air guiding head, and the second air guiding head is used to enhance the air suction effect of the cylindrical structure formed by the fixing plate and the rotating plate thereon.

[0014] The beneficial effects of the present invention are as follows: When the temperature at some positions inside the frequency conversion cabinet rises abnormally, the blocking mechanisms at other positions are closed, thereby enhancing the heat dissipation efficiency at this place of the frequency conversion cabinet, more easily reducing the temperature peak of the frequency conversion cabinet, and achieving a better temperature equalization control effect.

[0015] By changing the arrangement mode of the fixing plate and the rotating plate thereon, the present invention realizes two effects of reducing the flow rate at the blocking mechanism and improving the heat dissipation efficiency in the middle and lower parts of the frequency conversion cabinet, thereby optimizing the cooling efficiency at the opened blocking mechanism.

[0016] The present invention strengthens the functions of the fixing plate and the rotating plate thereon through the air distribution plate, the first air guiding head and the second air guiding head, and increases the pertinence of the device to improve the heat dissipation efficiency in the middle and lower parts of the frequency conversion cabinet. Description of the Drawings

[0017] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 is a cross-sectional view of the air inlet duct and the connection shell of the present invention;

[0019] Figure 3 is a cross-sectional view of the frequency conversion cabinet and the connection shell of the present invention;

[0020] Figure 4 is a three-dimensional structural schematic diagram of the connection shell and the blocking mechanism of the present invention;

[0021] Figure 5 is a three-dimensional structural schematic diagram of the fixing plate, the rotating plate and the air guiding strip of the present invention;

[0022] Figure 6 is a three-dimensional structural schematic diagram of the fixing plate, the rotating plate and the air guiding head of the present invention;

[0023] Figure 7 is a three-dimensional structural schematic diagram of the fixing plate and the rotating plate of the present invention;

[0024] Figure 8 Schematic three-dimensional structure diagram of the rotating plate and the air guiding strip of the present invention;

[0025] Figure 9 Schematic three-dimensional structure diagram of the air guiding head and the micro motor of the present invention;

[0026] Figure 10 Cross-sectional view of the air guiding head of the present invention;

[0027] Figure 11 Schematic three-dimensional structure diagram of the rotating gear and the second belt pulley of the present invention;

[0028] Figure 12 Cross-sectional view of the fixing plate of the present invention;

[0029] Figure 13 Schematic three-dimensional structure diagram of the air guiding duct and the air outlet of the present invention.

[0030] Names and serial numbers of components in the figure: 1, heat exchange body; 101, air inlet duct; 102, air exhaust duct; 2, frequency conversion cabinet; 3, connection shell; 4, blocking mechanism; 401, air guiding gap; 41, fixing plate; 42, rotating plate; 43, air guiding strip; 44, air guiding head; 45, micro motor; 46, limiting plate; 5, servo motor; 51, rotating gear; 52, first belt pulley; 53, second belt pulley; 6, winding roller; 7, dragging rope; 8, electric rotating shaft; 9, air dividing plate; 10, first air guiding head; 11, second air guiding head; 12, air guiding duct; 13, air outlet. Detailed implementation manners

[0031] The following specifically illustrates the implementation manners of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation manners. Each detail in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the features in different embodiments can be combined with each other without conflict.

[0032] An air-water cooling device for a high-voltage frequency converter, as Figures 1-5 shown, includes a heat exchange body 1 and a frequency conversion cabinet 2. The heat exchange body 1 is fixedly connected and communicated with an air inlet duct 101 and an air exhaust duct 102. The air inlet duct 101 is fixedly connected and communicated with a connection shell 3. The connection shell 3 is fixedly connected and communicated with the frequency conversion cabinet 2. Temperature monitoring devices are uniformly distributed in the frequency conversion cabinet 2. Blocking mechanisms 4 are installed at the connection between the frequency conversion cabinet 2 and the connection shell 3. The blocking mechanisms 4 are used to change the position of the connection between the frequency conversion cabinet 2 and the connection shell 3 according to the temperatures of different parts of the frequency conversion cabinet 2, and focus on dissipating heat from the positions of the frequency conversion cabinet 2 where heat generation is serious.

[0033] In the above solution, the heat exchange body 1 contains essential components for water cooling such as a heat exchange system, a compressor, and a control terminal. The electrical components in the frequency conversion cabinet 2 are installed on the right side inside it. The figure mainly shows a three-connected cabinet body. Figure 1 In the figure, each pair of cabinet doors corresponds to a cabinet body. The device can also install three plugging mechanisms 4 on the upper parts of three mutually separated cabinet bodies to cool the electrical components in the three partitioned cabinet bodies respectively. The temperature monitoring device is electrically connected to the control terminal. The temperature monitoring device is a plurality of temperature sensors for monitoring the temperature in different cabinet bodies of the frequency conversion cabinet 2. The heat exchange body 1 is used to extract the hot air in the frequency conversion cabinet 2 through the air inlet duct 101 and the connection shell 3, cool the hot air to low-temperature cold air through the heat exchange system inside it, and finally discharge the low-temperature cold air into the room through the air outlet duct 102. The plugging mechanism 4 is electrically connected to the control terminal.

[0034] Furthermore, as Figures 4-9 shown, the plugging mechanism 4 includes symmetrically distributed fixing plates 41. The fixing plates 41 are rotatably connected to the frequency conversion cabinet 2. The fixing plates 41 are fixedly connected with limiting plates 46. The fixing plates 41 are provided with evenly distributed rotating plates 42. The fixing plates 41 are limited and rotatably connected to the rotating plates 42 close to the limiting plates 46, and a torsion spring is fixedly connected between the two. Adjacent rotating plates 42 are limited and rotatably connected, and a torsion spring is fixedly connected between the two. The limiting plates 46 are used to limit the rotating plates 42 on the adjacent fixing plates 41 that are farthest from themselves. A wind guiding gap 401 is provided between adjacent rotating plates 42. The frequency conversion cabinet 2 is provided with a power assembly for driving the symmetrically distributed fixing plates 41 to rotate and open simultaneously.

[0035] In the above solution, the arrangement of the fixing plates 41 and the rotating plates 42 thereon is as Figure 5 and Figure 6 shown, and Figure 5 and Figure 6 show the initial positions of the fixing plates 41 and the rotating plates 42. The wind guiding gap 401 is used to leave a gap for air flow when the fixing plates 41 and the rotating plates 42 thereon are flattened. Thus, when the ventilation volume of the plugging mechanism 4 is reduced by flattening the fixing plates 41 and the rotating plates 42 thereon, it can be avoided that the air flow completely stops at the plugging mechanism 4. The power assembly is electrically connected to the control terminal.

[0036] Furthermore, as Figure 6 、 Figure 11 and Figure 12As shown in the figure, the power assembly includes a servo motor 5, which is fixedly connected to the frequency conversion cabinet 2. Symmetrically distributed rotating gears 51 are rotatably connected to the frequency conversion cabinet 2 near the servo motor 5. The symmetrically distributed rotating gears 51 mesh with each other. The output shaft of the servo motor 5 is fixedly connected to the adjacent rotating gear 51. The rotating gear 51 is rotatably connected to a first pulley 52, and there is damping between them. A fixing plate 41 is fixedly connected to a second pulley 53, and the second pulley 53 is rotatably connected to the frequency conversion cabinet 2. The first pulley 52 and the adjacent second pulley 53 are driven by a belt. A dragging assembly for driving the rotating plate 42 on the adjacent fixing plate 41 to rotate is arranged on the rotating gear 51, so that the fixing plate 41 and the rotating plate 42 thereon form a cylindrical structure.

[0037] In the above solution, the servo motor 5 is electrically connected to the control terminal. The rotating gear 51 drives the first pulley 52 thereon to rotate through damping. When the first pulley 52 rotates to the limit state and cannot rotate, the servo motor 5 drives the rotating gear 51 to rotate relative to the first pulley 52. The diameter of the second pulley 53 is larger than that of the first pulley 52, reducing the speed of the first pulley 52 driving the second pulley 53 to rotate. The cylindrical structure formed by the fixing plate 41 and the rotating plate 42 thereon is as Figure 7 shown. This cylindrical structure is used to extract the hot air flow in the middle and lower parts of the frequency conversion cabinet 2, thereby enhancing the heat dissipation efficiency of the device for the middle and lower parts of the frequency conversion cabinet 2 when the fixing plate 41 and the rotating plate 42 thereon are opened.

[0038] Furthermore, as shown in Figures 5-7 、 Figure 11 and Figure 12 shown, the dragging assembly includes symmetrically distributed winding rollers 6, which are fixedly connected to the adjacent rotating gears 51. The winding rollers 6 are wound with dragging ropes 7. The dragging ropes 7 penetrate the adjacent fixing plates 41, the adjacent second pulleys 53 and the frequency conversion cabinet 2. The dragging ropes 7 are fixedly connected to the rotating plate 42 on the adjacent blocking mechanism 4 that is farthest from the distance limiting plate 46.

[0039] In the above solution, the dragging ropes 7 are steel wires. The dragging ropes 7 are used to drag the rightmost rotating plate 42 on the adjacent blocking mechanism 4 to the left, so that the rightmost rotating plate 42 gradually moves to the position in contact with the adjacent limiting plate 46, thereby forming a cylindrical structure by the fixing plate 41 and the rotating plate 42 thereon. A number of guide wheels are rotatably connected in the frequency conversion cabinet 2, and the guide wheels are used to guide the adjacent dragging ropes 7.

[0040] Furthermore, as shown in Figures 6-10 shown, air guiding strips 43 are fixedly connected to the rotating plate 42, and the air guiding strips 43 correspond to the air guiding gaps 401 between the adjacent two rotating plates 42 one by one. The air guiding strips 43 are used to block the corresponding air guiding gaps 401.

[0041] Furthermore, as shown in Figure 8As shown, one side of the air guide strip 43 away from the adjacent rotating plate 42 is flexible.

[0042] In the above solution, the air guide strip 43 is used to block the corresponding air guide gap 401 when the adjacent fixed plate 41 and the rotating plate 42 thereon form a cylindrical structure, so as to increase the air guide effect of the adjacent cylindrical structure. When the adjacent fixed plate 41 and the rotating plate 42 thereon are flattened, the air guide strip 43 does not block the corresponding air guide gap 401, and the air below the blocking mechanism 4 still flows upward through the air guide gap 401 thereon.

[0043] Further, as shown in Figure 6 , Figure 7 , Figure 9 and Figure 10 , a micro motor 45 is fixedly connected to one of the rotating plates 42. The output shaft of the micro motor 45 is fixedly connected to an air guide head 44, and the air guide head 44 is rotatably connected to the adjacent rotating plate 42.

[0044] Further, as shown in Figure 7 , Figure 9 and Figure 10 , the flow area of the air guide head 44 gradually decreases from the side close to the adjacent micro motor 45 to the side away from the adjacent micro motor 45.

[0045] In the above solution, the micro motor 45 is electrically connected to the control terminal. The air guide head 44 is made of soft rubber. The air guide head 44 is used to guide the direction of air absorption of the cylindrical structure formed by the fixed plate 41 and the rotating plate 42 thereon, so as to make the cylindrical structure absorb more hot air near the electrical components on the right side of the frequency conversion cabinet 2, and improve the heat dissipation efficiency of the electrical components in the middle and lower parts of the frequency conversion cabinet 2. As shown in Figure 7 , the flow area of the air guide head 44 gradually increases from bottom to top, which is used to increase the wind speed at the lower outlet of the air guide head 44, and then drive the gas near the frequency conversion cabinet 2 to flow rapidly through the rapidly flowing air flow, apply an upward flowing force to the surrounding air, and then increase the air flow speed in the frequency conversion cabinet 2 and improve the overall heat dissipation efficiency of the device.

[0046] The working principle of the above solution is as follows: When the staff uses this device, the electronic components are installed on the right side inside the frequency conversion cabinet 2. Subsequently, the compressor and the heat exchange system in the heat exchange body 1 are started through the control terminal. The heat exchange body 1 extracts the air inside the connection shell 3 through the air inlet duct 101. The control terminal opens the three blocking mechanisms 4. Taking the middle blocking mechanism 4 as an example, the control terminal controls the output shaft of the servo motor 5 to drive the rotating gear 51 thereon to rotate counterclockwise (viewed from right to left). The rotating gear 51 drives the adjacent rotating gear 51 to rotate in the opposite direction. The two rotating gears 51 respectively drive the adjacent first belt pulleys 52 to rotate through damping. The first belt pulley 52 close to the output shaft of the servo motor 5 drives the corresponding second belt pulley 53 to rotate counterclockwise through the belt (viewed from right to left). The other first belt pulley 52 drives the corresponding second belt pulley 53 to rotate clockwise through the belt (viewed from right to left). The two second belt pulleys 53 jointly drive the two fixing plates 41 to gradually rotate from the horizontal state to the vertical state. The two fixing plates 41 open towards each other. When the fixing plates 41 rotate to the vertical state, both the first belt pulley 52 and the second belt pulley 53 rotate to the limit position and cannot continue to rotate. The output shaft of the servo motor 5 continues to drive the rotating gear 51 thereon, and the rotating gear 51 rotates relative to the adjacent first belt pulley 52.

[0047] During the rotation of the rotating gear 51, the winding roller 6 thereon is driven to rotate synchronously. The winding roller 6 winds up the dragging rope 7 thereon. The dragging rope 7 drags the connected rotating plate 42 towards the limiting plate 46 on the adjacent fixing plate 41. All the rotating plates 42 on the fixing plate 41 rotate simultaneously. The torsion springs on all the rotating plates 42 store energy together until the rotating plate 42 connected to the dragging rope 7 contacts the limiting plate 46. The limiting plate 46 limits the rotating plate 42 connected to the dragging rope 7. The fixing plate 41 and the rotating plates 42 thereon jointly form a cylindrical structure. The air guiding strips 43 block the corresponding air guiding gaps 401. At this time, the dragging rope 7 cannot be wound up by the winding roller 6 any further. The control terminal turns off the servo motor 5 and starts the micro motor 45. The output shaft of the micro motor 45 drives the air guiding head 44 to rotate, so that the air guiding head 44 rotates downward and is connected to the lower part of the cylindrical structure formed by the adjacent fixing plate 41 and the rotating plates 42 thereon. The control terminal then turns off the micro motor 45. At this time, the two fixing plates 41 are in the open state. The cylindrical structure formed by the fixing plate 41 and the rotating plates 42 thereon and the air guiding head 44 jointly extract the hot air in the space of the frequency conversion cabinet 2, improving the heat dissipation efficiency of the middle and lower parts of the frequency conversion cabinet 2. The connection shell 3 extracts the hot air in the three cabinets inside the frequency conversion cabinet 2 respectively through the three blocking mechanisms 4, uniformly dissipating heat from the three frequency conversion cabinets 2. The control terminal monitors the temperatures in the three cabinets of the frequency conversion cabinet 2 through the temperature monitoring device during the heat dissipation process.

[0048] When the temperature in one of the cabinets rises abnormally, taking the abnormal heating of the electrical components in the middle cabinet as an example, the control terminal first controls the closing of the blocking mechanisms 4 on the front and rear sides. Taking the control of the closing of the blocking mechanism 4 on the front side as an example, the control terminal first controls the output shaft of the front-side micro motor 45 to rotate in the reverse direction. The output shaft of the micro motor 45 drives the air guide head 44 to rotate and reset. When the air guide head 44 is reset, the control terminal controls the output shaft of the servo motor 5 to rotate in the reverse direction and reset. The output shaft of the servo motor 5 drives the rotating gear 51, the first belt pulley 52, the second belt pulley 53 and the winding roller 6 to rotate in the reverse direction. The winding roller 6 gradually releases the dragging rope 7 thereon. The fixed plate 41 gradually rotates to the horizontal state driven by the second belt pulley 53. The cylindrical structure formed by the fixed plate 41 and the rotating plate 42 thereon gradually flattens under the action of the torsion spring on the rotating plate 42. When the fixed plate 41 rotates to the horizontal state, the first belt pulley 52 and the second belt pulley 53 rotate to the limit position, and the first belt pulley 52 and the second belt pulley 53 stop rotating. The rotating gear 51 and the winding roller 6 rotate relative to the first belt pulley 52 and continue to release the dragging rope 7 until the fixed plate 41 and the rotating plate 42 thereon are completely flattened. The control terminal turns off the servo motor 5. At this time, the air guide strip 43 no longer blocks the corresponding air guide gap 401. The blocking mechanisms 4 on the front and rear sides extract the hot air from the lower side of the cabinet through the air guide gap 401. Because the flow rate at the blocking mechanisms 4 on the front and rear sides becomes smaller, and the blocking mechanism 4 in the middle remains in the open state, the air inlet duct 101 extracts the hot air from the middle and lower parts of the cabinet of the blocking mechanism 4 in the middle through negative pressure, increasing the heat dissipation efficiency of the electrical components in the middle cabinet of the frequency conversion cabinet 2. When the electrical components in the middle cabinet no longer heat abnormally, the control terminal controls the blocking mechanisms 4 on the front and rear sides to open again to uniformly dissipate heat from different cabinets in the frequency conversion cabinet 2. When the staff needs to repair the electrical components in the frequency conversion cabinet 2, the staff closes all the blocking mechanisms 4 through the control terminal to avoid the blocking mechanisms 4 from hindering the staff's repair process.

[0049] Further, as Figures 2-4 and Figure 13 shown, it further includes symmetrically distributed electric rotating shafts 8. The symmetrically distributed electric rotating shafts 8 are fixedly connected to the connection shell 3. The electric rotating shafts 8 are fixedly connected with air distribution plates 9. The symmetrically distributed air distribution plates 9 together divide the communication part between the connection shell 3 and the air inlet duct 101 into multiple flow channels.

[0050] In the above solution, the electric rotating shaft 8 is electrically connected to the control terminal. The two air distribution plates 9 are respectively used to equally divide the negative pressure in the air inlet duct 101 into the same number of parts as the number of cabinets in the frequency conversion cabinet 2. In this solution, the air distribution plate 9 equally divides the left side of the air inlet duct 101 into three flow channels. By adjusting the ratio of the flow areas of the three flow channels, the intensity of sucking the air inside the cabinets of different frequency conversion cabinets 2 in the air inlet duct 101 is adjusted. Cooperating with the blocking mechanism 4, the cooling effect of the device on the interior of the high-temperature cabinets in the frequency conversion cabinet 2 is enhanced. The heat exchange body 1 is fixedly connected and communicated with a wind guide pipe 12. The wind guide pipe 12 is provided with evenly distributed air outlet openings 13. The heat exchange body 1 directly sends part of the cold air into the frequency conversion cabinet 2 through the wind guide pipe 12 and the air outlet openings 13, so that the cold air pushes the hot air at the lower side in the frequency conversion cabinet 2 to flow upward. At the same time, the transformation degree of the structure of the existing high-voltage frequency conversion room by this structure is small, and it can be adapted to a variety of different high-voltage frequency conversion room transformation schemes, increasing the applicability of the device.

[0051] Further, as Figures 2-4 shown, evenly distributed first air guiding heads 10 are fixedly connected inside the air inlet duct 101, and second air guiding heads 11 are fixedly connected at intervals inside the connection shell 3. The number of the second air guiding heads 11 is the same as that of the first air guiding heads 10. The first air guiding heads 10 and the adjacent second air guiding heads 11 are communicated through hoses. At least one fixing plate 41 corresponds to one second air guiding head 11. The second air guiding heads 11 are used to enhance the air suction effect of the cylindrical structure formed by the fixing plate 41 and the rotating plate 42 thereon.

[0052] In the above solution, the first air guiding heads 10 are located inside the air inlet duct 101, the second air guiding heads 11 are located above the adjacent fixing plates 41, and when the fixing plate 41 and the rotating plate 42 thereon form a cylindrical structure, the cylindrical structure is aligned with the adjacent second air guiding heads 11. Then, through the negative pressure suction in the air inlet duct 101, the air at the lower end of the cylindrical structure formed by the adjacent fixing plate 41 and the rotating plate 42 thereon is directly sucked, improving the efficiency of sucking the air below the cylindrical structure.

[0053] The working principle is as follows: When the device evenly dissipates heat from different cabinets in the frequency conversion cabinet 2, the two air distribution plates 9 maintain their initial positions unchanged. At this time, since the second air guiding head 11 is aligned with the cylindrical structure formed by the adjacent fixing plate 41 and the rotating plate 42 thereon, the air inlet duct 101 directly extracts the air in different cabinets in the frequency conversion cabinet 2 through the first air guiding head 10, the second air guiding head 11 and this cylindrical structure, enhancing the air flow velocity of this cylindrical structure and the air below it. When the temperature in one of the cabinets in the frequency conversion cabinet 2 rises abnormally, taking the rise in the air temperature in the rear cabinet of the frequency conversion cabinet 2 as an example, the control terminal controls the two electric rotating shafts 8 to rotate forward. The electric rotating shafts 8 drive the air distribution plates 9 to swing forward, increasing the proportion of the rear flow channel in the air inlet duct 101, thereby increasing the air flow velocity in the rear flow of the air inlet duct 101, and cooperating with the blocking mechanism 4 at the rear to quickly dissipate heat from the rear cabinet of the frequency conversion cabinet 2. When the temperatures in different cabinets in the frequency conversion cabinet 2 are similar, the control terminal controls the two electric rotating shafts 8 to drive the adjacent air distribution plates 9 to swing back to their original positions.

[0054] The technical principle of the embodiments of the present invention has been described above in combination with specific embodiments. These descriptions are only for explaining the principle of the embodiments of the present invention and cannot be construed in any way as a limitation on the protection scope of the embodiments of the present invention. Based on the explanations herein, those skilled in the art can readily conceive of other specific embodiments of the embodiments of the present invention without creative efforts, and these embodiments will fall within the protection scope of the embodiments of the present invention.

Claims

1. An air-water cooling device for a high-voltage frequency converter, characterized in that: It includes a heat exchange body (1) and a frequency conversion cabinet (2). The heat exchange body (1) is fixedly connected and communicated with an air inlet duct (101) and an air outlet duct (102). The air inlet duct (101) is fixedly connected and communicated with a connecting shell (3). The connecting shell (3) is fixedly connected and communicated with the frequency conversion cabinet (2). A temperature monitoring device is evenly distributed in the frequency conversion cabinet (2). A sealing mechanism (4) is evenly installed at the connection between the frequency conversion cabinet (2) and the connecting shell (3). The sealing mechanism (4) is used to change the position of the connection between the frequency conversion cabinet (2) and the connecting shell (3) according to the temperature of different parts of the frequency conversion cabinet (2), and focuses on dissipating heat from the position where the frequency conversion cabinet (2) generates serious heat. The sealing mechanism (4) includes symmetrically distributed fixing plates (41). The fixing plates (41) are rotatably connected to the frequency conversion cabinet (2). The fixing plates (41) are fixedly connected with limit plates (46). The fixing plates (41) are provided with evenly distributed rotating plates (42). The fixing plates (41) are limit-rotatably connected to the rotating plates (42) close to the limit plates (46), and a torsion spring is fixedly connected between the two. Adjacent two rotating plates (42) are limit-rotatably connected, and a torsion spring is fixedly connected between the two. The limit plate (46) is used to limit the rotating plate (42) on the adjacent fixing plate (41) that is farthest from itself. A wind guiding gap (401) is provided between adjacent two rotating plates (42). The frequency conversion cabinet (2) is provided with a power component for driving the symmetrically distributed fixing plates (41) to rotate and open simultaneously.

2. The air-water cooling device for high-voltage frequency converter according to claim 1, characterized in that: The power component includes a servo motor (5). The servo motor (5) is fixedly connected to the frequency conversion cabinet (2). Symmetrically distributed rotating gears (51) are rotatably connected to the frequency conversion cabinet (2) near the servo motor (5). The symmetrically distributed rotating gears (51) are meshed with each other. The output shaft of the servo motor (5) is fixedly connected to the adjacent rotating gear (51). The rotating gear (51) is rotatably connected with a first pulley (52), and there is damping between the two. The fixing plate (41) is fixedly connected with a second pulley (53). The second pulley (53) is rotatably connected to the frequency conversion cabinet (2). The first pulley (52) and the adjacent second pulley (53) are driven by a belt. A dragging component is provided on the rotating gear (51) to drive the rotating plate (42) on the adjacent fixing plate (41) to rotate, so that the fixing plate (41) and the rotating plate (42) thereon form a cylindrical structure.

3. The air-water cooling device for high-voltage frequency converter according to claim 2, characterized in that: The dragging component includes symmetrically distributed winding rollers (6). The winding rollers (6) are fixedly connected to the adjacent rotating gears (51). The winding rollers (6) are wound with dragging ropes (7). The dragging ropes (7) penetrate through the adjacent fixing plates (41), the adjacent second pulleys (53) and the frequency conversion cabinet (2). The dragging ropes (7) are fixedly connected to the rotating plate (42) on the adjacent sealing mechanism (4) that is farthest from the limit plate (46).

4. The air and water cooling device for high-voltage frequency converter according to claim 3, wherein: A wind guiding strip (43) is fixedly connected to the rotating plate (42), and the wind guiding strip (43) corresponds to the wind guiding gap (401) between two adjacent rotating plates (42) one by one. The wind guiding strip (43) is used to block the corresponding wind guiding gap (401).

5. The air-water cooling device for a high-voltage frequency converter according to claim 4, wherein: One side of the wind guiding strip (43) away from the adjacent rotating plate (42) has flexibility.

6. The air-water cooling device for high-voltage frequency converter according to claim 5, characterized in that: A micro motor (45) is fixedly connected to one of the rotating plates (42), and a wind guiding head (44) is fixedly connected to the output shaft of the micro motor (45). The wind guiding head (44) is rotatably connected to the adjacent rotating plate (42).

7. The air-water cooling device for a high-voltage frequency converter according to claim 6, wherein: The flow area of the wind guiding head (44) gradually decreases from the side close to the adjacent micro motor (45) to the side far from the adjacent micro motor (45).

8. The air-water cooling device for high-voltage frequency converter according to claim 1, characterized in that: It further includes symmetrically distributed electric rotating shafts (8). The symmetrically distributed electric rotating shafts (8) are fixedly connected to the connecting shell (3). The electric rotating shafts (8) are fixedly connected with air distribution plates (9). The symmetrically distributed air distribution plates (9) together divide the communication part between the connecting shell (3) and the air inlet duct (101) into multiple flow channels.

9. A water-cooled and air-cooled device for a high-voltage frequency converter according to claim 8, characterized in that: Evenly distributed first wind guiding heads (10) are fixedly connected in the air inlet duct (101). Spaced second wind guiding heads (11) are fixedly connected in the connecting shell (3). The number of the second wind guiding heads (11) is the same as that of the first wind guiding heads (10). The first wind guiding heads (10) are communicated with the adjacent second wind guiding heads (11) through hoses. At least one fixing plate (41) corresponds to one of the second wind guiding heads (11). The second wind guiding heads (11) are used to improve the air suction effect of the cylindrical structure formed by the fixing plate (41) and the rotating plate (42) thereon.

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