Air-water cooling device for high-voltage frequency converter

Abstract

The invention relates to the technical field of heat dissipation of high-voltage frequency conversion cabinets, in particular to an air-water cooling device for a high-voltage frequency converter. Comprising a heat exchange machine body and a frequency conversion cabinet, the heat exchange machine body is fixedly connected and communicated with an air inlet duct and an exhaust duct, the air inlet duct is fixedly connected and communicated with a connecting shell, the connecting shell is fixedly connected and communicated with the frequency conversion cabinet, and temperature monitoring devices which are evenly distributed are arranged in the frequency conversion cabinet. Uniformly distributed plugging mechanisms are mounted at the communication part of the frequency conversion cabinet and the connecting shell, and are used for changing the position of the communication part of the frequency conversion cabinet and the connecting shell according to the temperature of different parts of the frequency conversion cabinet, so as to emphatically dissipate heat of the seriously heated position of the frequency conversion cabinet. When the temperature of a part of positions in the frequency conversion cabinet rises abnormally, the plugging mechanisms at other positions are closed, so that the heat dissipation efficiency of the positions of the frequency conversion cabinet is enhanced, the temperature peak value of the frequency conversion cabinet is reduced more easily, and a better temperature equalization control effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of heat dissipation of high-voltage frequency converter cabinets, and in particular 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, air-water cooling devices can be directly installed in newly built high-voltage frequency conversion systems or adapted to existing equipment through simple modifications. The air-water cooling device cools the high-voltage frequency conversion cabinet by extracting hot air from the high-voltage frequency conversion cabinet into the heat exchange mechanism, and then discharges the cooled air back to the room where the high-voltage frequency conversion cabinet is located, thereby achieving overall temperature control of the high-voltage frequency conversion cabinet and the machine room environment. An existing air-water cooling device usually needs to handle the heat dissipation needs 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, and can only continue to averagely cool all the high-voltage frequency conversion cabinets it is responsible for. Although this indifferent heat dissipation mode has the function of dissipating the electrical components in the high-voltage frequency conversion cabinet, it is difficult to achieve a better uniform temperature control effect, resulting in limited overall cooling efficiency of the system, and unable to simultaneously reduce the temperature of each cabinet to a more ideal low value range. Summary of the invention

[0003] In order to overcome the shortcomings of the existing air-water cooling device that cannot specifically enhance the heat dissipation of high-temperature and high-pressure frequency conversion cabinets and can only continue to averagely cool all the high-voltage frequency conversion cabinets it is responsible for, an air-water cooling device for high-voltage frequency converter is provided.

[0004] The technical solution is: an air-water cooling device for a high-voltage frequency converter, comprising a heat exchange body and a frequency conversion cabinet, the heat exchange body being fixedly connected and connected to an air inlet and an air exhaust duct, the air inlet being fixedly connected and connected to a connecting shell, the connecting shell being fixedly connected and connected to the frequency conversion cabinet, the frequency conversion cabinet being provided with evenly distributed temperature monitoring devices, the connection between the frequency conversion cabinet and the connecting shell being installed with evenly distributed blocking mechanisms, the blocking mechanisms being used to change the position of the connection between the frequency conversion cabinet and the connecting shell according to the temperature of different parts of the frequency conversion cabinet, focusing on heat dissipation at the position where the frequency conversion cabinet is severely heated.

[0005] Furthermore, the blocking mechanism includes a symmetrically distributed fixed plate, which is rotatably connected to the frequency conversion cabinet, and the fixed plate is fixedly connected to a limiting plate. The fixed plate is provided with evenly distributed rotating plates, and the fixed plate is rotationally limited and connected to the rotating plate close to the limiting plate, and a torsion spring is fixedly connected therebetween. Two adjacent rotating plates are rotationally limited and connected therebetween, and a torsion spring is fixed therebetween. The limiting plate is used to limit the rotating plate on the adjacent fixed plate that is farthest from itself, and an air guide gap is provided between the two adjacent rotating plates. The frequency conversion cabinet is provided with a power component for driving the symmetrically distributed fixed plates to rotate and open at the same time.

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

[0007] Furthermore, the dragging assembly includes symmetrically distributed winding rollers, which are fixedly connected to the adjacent rotating gears. A dragging rope is wound around the winding rollers, and the dragging rope penetrates the adjacent fixed plate, the adjacent second pulley and the frequency conversion cabinet. The dragging rope is fixedly connected to the rotating plate on the adjacent blocking mechanism that is farthest from the limit plate.

[0008] Furthermore, an air guide strip is fixedly connected to the rotating plate, and the air guide strip corresponds one-to-one to the air guide gap between two adjacent rotating plates, and the air guide strip is used to block the corresponding air guide gap.

[0009] Furthermore, the side of the air guide strip away from the adjacent rotating plate is flexible.

[0010] Furthermore, a micro motor is fixedly connected to one of the rotating plates, an output shaft of the micro motor is fixedly connected to an air guide head, and the air guide head is rotatably connected to the adjacent rotating plate.

[0011] Furthermore, the flow area of ​​the air guide head gradually decreases from a side close to the adjacent micro motor to a side away from the adjacent micro motor.

[0012] Furthermore, it also includes symmetrically distributed electric rotating shafts, which are all fixedly connected to the connecting shell. The electric rotating shafts are fixedly connected with air dividing plates, and the symmetrically distributed air dividing plates together divide the connection between the connecting shell and the air inlet duct into multiple flow channels.

[0013] Furthermore, the air inlet duct is fixed with evenly distributed first air induction heads, the connecting shell is fixed with spaced second air induction heads, the number of the second air induction heads is consistent with the number of the first air induction heads, the first air induction heads are connected to the adjacent second air induction heads through a hose, one of the fixed plates corresponds to at least one of the second air induction heads, and the second air induction heads are used to enhance the air suction effect of the cylindrical structure formed by the fixed plate and the rotating plate thereon.

[0014] The beneficial effects of the present invention are as follows: when the temperature at some positions in the frequency converter cabinet rises abnormally, the present invention closes the blocking mechanism at other positions, thereby enhancing the heat dissipation efficiency of the frequency converter cabinet at that position, making it easier to reduce the temperature peak of the frequency converter cabinet and achieving better uniform temperature control effect.

[0015] The present invention achieves two effects of reducing the flow at the blocking mechanism and improving the heat dissipation efficiency in the lower part of the frequency converter cabinet by changing the arrangement of the fixed plate and the rotating plate thereon, thereby optimizing the cooling efficiency at the opened blocking mechanism.

[0016] The present invention strengthens the functions of the fixed plate and the rotating plate thereon by means of the air distribution plate, the first air induction head and the second air induction head, thereby increasing the pertinence of the device in improving the heat dissipation efficiency of the lower part of the frequency conversion cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 is a cross-sectional view of the air inlet duct and the connecting shell of the present invention; Figure 3 It is a cross-sectional view of the frequency conversion cabinet and the connection shell of the present invention; Figure 4 It is a three-dimensional structural schematic diagram of the connecting shell and the blocking mechanism of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the fixed plate, the rotating plate and the air guide strip of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the fixed plate, the rotating plate and the air guide head of the present invention; Figure 7 It is a three-dimensional structural schematic diagram of the fixed plate and the rotating plate of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the rotating plate and the air guide strip of the present invention; Fig. 9It is a schematic diagram of the three-dimensional structure of the air guide head and the micro motor of the present invention; Fig.10 is a cross-sectional view of the air guide of the present invention; Fig.11 It is a schematic diagram of the three-dimensional structure of the rotating gear and the second pulley of the present invention; Fig.12 is a cross-sectional view of a fixing plate of the present invention; Fig.13 It is a schematic diagram of the three-dimensional structure of the air guide duct and the air outlet of the present invention.

[0018] The names and serial numbers of the parts in the figure are: 1. heat exchanger body, 101. air inlet duct, 102. exhaust duct, 2. frequency conversion cabinet, 3. connecting shell, 4. blocking mechanism, 401. air guide gap, 41. fixing plate, 42. rotating plate, 43. air guide strip, 44. air guide head, 45. micro motor, 46. limit plate, 5. servo motor, 51. rotating gear, 52. first pulley, 53. second pulley, 6. winding roller, 7. drag rope, 8. electric shaft, 9. air distributor, 10. first air induction head, 11. second air induction head, 12. air guide duct, 13. air outlet. DETAILED DESCRIPTION

[0019] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways 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.

[0020] An air-water cooling device for a high voltage frequency converter, such as Figure 1-Figure 5 As shown, it includes a heat exchange body 1 and a frequency conversion cabinet 2. The heat exchange body 1 is fixedly connected and connected with an air inlet 101 and an exhaust 102. The air inlet 101 is fixedly connected and connected with a connecting shell 3. The connecting shell 3 is fixedly connected and connected with the frequency conversion cabinet 2. A uniformly distributed temperature monitoring device is arranged in the frequency conversion cabinet 2. A uniformly distributed blocking mechanism 4 is installed at the connection between the frequency conversion cabinet 2 and the connecting shell 3. The blocking 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 focus on dissipating the heat at the position where the frequency conversion cabinet 2 is seriously heated.

[0021] In the above scheme, the heat exchange body 1 contains the necessary water cooling components such as the heat exchange system, the compressor, and the control terminal. The electrical components in the frequency conversion cabinet 2 are installed on the right side inside. The figure mainly shows a three-connected cabinet. Figure 1Each pair of cabinet doors corresponds to a cabinet body. The device can also install three blocking mechanisms 4 on the upper parts of three cabinet bodies that are separated from each other, and cool down 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, which are used to monitor the temperatures in different cabinets in the frequency conversion cabinet 2. The heat exchange body 1 is used to extract hot air in the frequency conversion cabinet 2 through the air inlet duct 101 and the connecting shell 3, and cool the hot air into low-temperature cold air through its internal heat exchange system, and finally discharge the low-temperature cold air into the room through the exhaust duct 102. The blocking mechanism 4 is electrically connected to the control terminal.

[0022] Further, if Figure 4-Figure 9 As shown, the blocking mechanism 4 includes a symmetrically distributed fixed plate 41, which is rotatably connected to the frequency conversion cabinet 2, and the fixed plate 41 is fixedly connected to a limit plate 46. The fixed plate 41 is provided with uniformly distributed rotating plates 42. The fixed plate 41 is rotatably connected to a rotating plate 42 close to the limit plate 46, and a torsion spring is fixedly connected therebetween. Two adjacent rotating plates 42 are rotatably connected in a limited manner, and a torsion spring is fixed therebetween. The limit plate 46 is used to limit the rotating plate 42 on the adjacent fixed plate 41 that is farthest from itself, and an air guide gap 401 is provided between the two adjacent rotating plates 42. The frequency conversion cabinet 2 is provided with a power component for driving the symmetrically distributed fixed plates 41 to rotate and open at the same time.

[0023] In the above scheme, the arrangement of the fixed plate 41 and the rotating plate 42 thereon is as follows: Figure 5 and Figure 6 shown, and Figure 5 and Figure 6 In the middle is the initial position of the fixed plate 41 and the rotating plate 42. The air guide gap 401 is used to leave a gap for air flow when the fixed plate 41 and the rotating plate 42 thereon are flattened, so as to avoid that the air in the blocking mechanism 4 completely stops flowing when the ventilation volume of the blocking mechanism 4 is reduced by flattening the fixed plate 41 and the rotating plate 42 thereon. The power component is electrically connected to the control terminal.

[0024] Further, if Figure 6 , Fig.11 and Fig.12As shown, the power component includes a servo motor 5, which is fixedly connected to the frequency conversion cabinet 2. The frequency conversion cabinet 2 is rotatably connected to a symmetrically distributed rotating gear 51 near the servo motor 5, and 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, and the rotating gear 51 is rotatably connected to the first pulley 52, and there is damping between the two. The fixed plate 41 is fixedly connected to the 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. The rotating gear 51 is provided with a dragging component that drives the rotating plate 42 on the adjacent fixed plate 41 to rotate, so that the fixed plate 41 and the rotating plate 42 thereon form a cylindrical structure.

[0025] In the above scheme, the servo motor 5 is electrically connected to the control terminal, and 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 the diameter of the first pulley 52, and the speed at which the first pulley 52 drives the second pulley 53 to rotate is reduced. The cylindrical structure formed by the fixed plate 41 and the rotating plate 42 thereon is as shown in FIG. Figure 7 As shown, the cylindrical structure is used to extract the hot air flow in the middle and lower part of the frequency converter cabinet 2, thereby enhancing the heat dissipation efficiency of the device for the middle and lower part of the frequency converter cabinet 2 when the fixed plate 41 and the rotating plate 42 thereon are opened.

[0026] Further, if Figure 5-Figure 7 , Fig.11 and Fig.12 As shown, the dragging assembly includes symmetrically distributed winding rollers 6, which are fixed to the adjacent rotating gears 51. The winding rollers 6 are wound with drag ropes 7, which penetrate the adjacent fixed plate 41, the adjacent second pulley 53 and the frequency converter cabinet 2. The dragging rope 7 is fixed to the rotating plate 42 on the adjacent blocking mechanism 4 which is farthest from the limit plate 46.

[0027] In the above scheme, the towing rope 7 is a steel wire rope, and the towing rope 7 is 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 a position in contact with the adjacent limiting plate 46, so that the fixed plate 41 and the rotating plate 42 thereon form a cylindrical structure, and a plurality of guide wheels are rotatably connected in the frequency converter cabinet 2, and the guide wheels are used to guide the adjacent towing ropes 7.

[0028] Further, if Figure 6-Figure 10 As shown, an air guide strip 43 is fixedly connected to the rotating plate 42 , and the air guide strip 43 corresponds to the air guide gap 401 between two adjacent rotating plates 42 . The air guide strip 43 is used to block the corresponding air guide gap 401 .

[0029] Further, if Figure 8As shown, the side of the air guide strip 43 away from the adjacent rotating plate 42 is flexible.

[0030] In the above scheme, the air guide strip 43 is used to block the corresponding air guide gap 401 when the adjacent fixed plates 41 and the rotating plates 42 thereon form a cylindrical structure, so as to increase the air guiding effect of the adjacent cylindrical structure. When the adjacent fixed plates 41 and the rotating plates 42 thereon are flattened, the air guide strip 43 does not block the corresponding air guide gap 401, and the air on the lower side of the blocking mechanism 4 still flows upward through the air guide gap 401 thereon.

[0031] Further, if Figure 6 , Figure 7 , Fig. 9 and Fig.10 As shown, a micro motor 45 is fixedly connected to one of the rotating plates 42 , an output shaft of the micro motor 45 is fixedly connected to a wind guide head 44 , and the wind guide head 44 is rotatably connected to the adjacent rotating plate 42 .

[0032] Further, if Figure 7 , Fig. 9 and Fig.10 As shown, 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 .

[0033] In the above scheme, the micro motor 45 is electrically connected to the control terminal, and the air guide head 44 is made of soft rubber. The air guide head 44 is used to guide the direction in which the cylindrical structure formed by the fixed plate 41 and the rotating plate 42 thereon absorbs air, thereby allowing the cylindrical structure to absorb more hot air near the electrical components on the right side of the frequency converter cabinet 2, thereby improving the heat dissipation efficiency of the electrical components in the lower part of the frequency converter cabinet 2. Figure 7 As shown, the flow area of ​​the wind guide head 44 gradually increases from bottom to top, which is used to increase the wind speed at the lower outlet of the wind guide head 44, and then drive the gas near the frequency converter cabinet 2 to flow rapidly through the fast-flowing airflow, exert an upward flow force on the surrounding air, thereby increasing the flow speed of the air in the frequency converter cabinet 2 and improving the overall heat dissipation efficiency of the device.

[0034] The working principle of the above scheme is as follows: when using the device, the staff installs the electronic components on the right side of the frequency conversion cabinet 2, and then starts the compressor and heat exchange system in the heat exchange body 1 through the control terminal. The heat exchange body 1 extracts air in the connecting shell 3 through the air inlet 101. The control terminal opens the three blocking mechanisms 4. Taking the blocking mechanism 4 in the middle 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 (from the right to the left perspective), and 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 pulleys 52 to rotate through damping, and the output shaft near the servo motor 5 The first pulley 52 of the shaft rotates counterclockwise (from right to left perspective) through the belt transmission corresponding to the second pulley 53, and the other first pulley 52 rotates clockwise (from right to left perspective) through the belt transmission corresponding to the second pulley 53, and the two second pulleys 53 jointly drive the two fixed plates 41 to gradually rotate downward from a horizontal state to a vertical state, and the two fixed plates 41 open to each other. When the fixed plates 41 rotate to the vertical state, the first pulley 52 and the second pulley 53 both rotate to the extreme 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 pulley 52.

[0035] During the rotation of the rotating gear 51, the winding roller 6 thereon is driven to rotate synchronously, and the winding roller 6 reels the drag rope 7 thereon. The drag rope 7 drags the connected rotating plate 42 toward the limit plate 46 on the adjacent fixed plate 41, and all the rotating plates 42 on the fixed plate 41 rotate at the same time. The torsion springs on all the rotating plates 42 store force together until the rotating plate 42 connected to the drag rope 7 contacts the limit plate 46. The limit plate 46 limits the rotating plate 42 connected to the drag rope 7. The fixed plate 41 and the rotating plate 42 thereon form a cylindrical structure together, and the air guide strip 43 blocks the corresponding air guide gap 401. At this time, the drag rope 7 cannot be further wound by the winding roller 6, and 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 guide head 44 to rotate, so that the air guide head 44 rotates downward and connects to the lower part of the cylindrical structure formed by the adjacent fixed plate 41 and the upper rotating plate 42. The control terminal then closes the micro motor 45. At this time, the two fixed plates 41 are in an open state. The cylindrical structure formed by the fixed plate 41 and the upper rotating plate 42 and the air guide head 44 jointly extract the hot air in the space of the frequency conversion cabinet 2, thereby improving the heat dissipation efficiency of the middle and lower part of the frequency conversion cabinet 2. The connecting shell 3 extracts the hot air from the three cabinets in the frequency conversion cabinet 2 through the three blocking mechanisms 4 respectively, and evenly dissipates the heat of the three frequency conversion cabinets 2. During the heat dissipation process, the control terminal monitors the temperature inside the three cabinets of the frequency conversion cabinet 2 through the temperature monitoring device.

[0036] 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 closing of the blocking mechanism 4 on the front side as an example, the control terminal first controls the output shaft of the micro motor 45 on the front side to rotate in the opposite direction, and 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 and reset in the opposite direction, and the output shaft of the servo motor 5 drives the rotating gear 51, the first pulley 52, the second pulley 53 and the winding roller 6 to rotate in the opposite direction. The winding roller 6 gradually releases the drag rope 7 thereon, and the fixed plate 41 is driven by the second pulley 53 to gradually rotate to a horizontal state. The cylindrical structure formed by the fixed plate 41 and the rotating plate 42 thereon is gradually rotated under the action of the torsion spring on the rotating plate 42. Gradually flattened, when the fixed plate 41 rotates to a horizontal state, the first pulley 52 and the second pulley 53 rotate to the extreme position, the first pulley 52 and the second pulley 53 stop rotating, the rotating gear 51 and the winding roller 6 rotate relative to the first pulley 52, and continue to release the towing rope 7 until the fixed plate 41 and the rotating plate 42 thereon are completely flattened, and 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, and the blocking mechanism 4 on the front and rear sides extracts the hot air of the lower cabinet through the air guide gap 401. Because the flow rate at the blocking mechanism 4 on the front and rear sides becomes smaller, and the middle blocking mechanism 4 is still in an open state, the air inlet 101 extracts the hot air in the middle and lower part of the cabinet of the middle blocking mechanism 4 through negative pressure, thereby increasing the heat dissipation efficiency of the electrical components in the middle cabinet of the frequency converter cabinet 2. When the electrical components in the middle cabinet no longer generate abnormal heat, the control terminal controls the sealing mechanisms 4 on the front and rear sides to reopen, thereby evenly dissipating heat for different cabinets in the frequency converter cabinet 2. When the staff needs to inspect and repair the electrical components in the frequency converter cabinet 2, the staff closes all the sealing mechanisms 4 at the same time through the control terminal, thereby preventing the sealing mechanisms 4 from obstructing the staff's inspection and repair process.

[0037] Further, if Figure 2-Figure 4 and Fig.13 As shown, it also includes symmetrically distributed electric shafts 8, which are all fixedly connected to the connecting shell 3. The electric shafts 8 are fixedly connected with air dividing plates 9, and the symmetrically distributed air dividing plates 9 together divide the connection between the connecting shell 3 and the air inlet 101 into multiple flow channels.

[0038] In the above scheme, the electric shaft 8 is electrically connected to the control terminal, and the two air distribution plates 9 are respectively used to divide the negative pressure in the air inlet 101 into a number equal to the number of cabinets in the frequency conversion cabinet 2. In this scheme, the air distribution plate 9 divides the left side of the air inlet 101 into three equal flow channels. By adjusting the ratio of the flow area of ​​the three flow channels, the strength of the air inlet 101 to extract the air in the cabinets of different frequency conversion cabinets 2 is adjusted, and cooperates with the blocking mechanism 4 to enhance the cooling effect of the device on the high-temperature cabinet inside the frequency conversion cabinet 2. The heat exchange body 1 is fixedly connected and connected to the air guide duct 12, and the air guide duct 12 is provided with evenly distributed air outlets 13. The heat exchange body 1 directly delivers part of the cold air into the frequency conversion cabinet 2 through the air guide duct 12 and the air outlet 13, so that the cold air pushes the hot air on the lower side of the frequency conversion cabinet 2 to flow upward. At the same time, the structure has a small degree of modification to the existing high-voltage frequency conversion room structure, and can be adapted to a variety of different high-voltage frequency conversion room modification schemes, thereby increasing the applicability of the device.

[0039] Further, if Figure 2-Figure 4 As shown, evenly distributed first air induction heads 10 are fixedly connected in the air inlet 101, and spaced-apart second air induction heads 11 are fixedly connected in the connecting shell 3. The number of second air induction heads 11 is consistent with the number of first air induction heads 10. The first air induction heads 10 are connected to the adjacent second air induction heads 11 through a hose. One fixed plate 41 corresponds to at least one second air induction head 11. The second air induction heads 11 are used to lift the fixed plate 41 and the rotating plate 42 thereon to form a suction effect of a cylindrical structure.

[0040] In the above scheme, the first draft head 10 is located in the air inlet 101, the second draft head 11 is located above the adjacent fixed plate 41, and when the fixed plate 41 and the rotating plate 42 thereon form a cylindrical structure, the cylindrical structure is aligned with the adjacent second draft head 11, and then through the negative pressure suction force in the air inlet 101, the air at the lower end of the cylindrical structure formed by the adjacent fixed plate 41 and the rotating plate 42 thereon is directly sucked in, thereby improving the efficiency of the cylindrical structure in extracting the air on its lower side.

[0041] The working principle is as follows: when the device evenly dissipates heat to different cabinets in the frequency conversion cabinet 2, the two air distribution plates 9 maintain their initial positions unchanged. At this time, because the second air induction head 11 is aligned with the cylindrical structure formed by the adjacent fixed plate 41 and the rotating plate 42 thereon, the air inlet 101 directly extracts air from different cabinets in the frequency conversion cabinet 2 through the first air induction head 10, the second air induction head 11 and the cylindrical structure, thereby enhancing the flow rate of the air under the cylindrical structure. When the temperature in one of the cabinets in the frequency conversion cabinet 2 rises abnormally, the air inlet 101 is directly drawn to the cabinet 2. When the temperature is high, taking the increase of air temperature in the cabinet at the rear side of the frequency converter cabinet 2 as an example, the control terminal controls the two electric shafts 8 to rotate forward, and the electric shafts 8 drive the air distributor 9 to swing forward, so that the proportion of the rear flow channel in the air inlet 101 increases, thereby increasing the air flow rate in the flow at the rear side of the air inlet 101, and cooperating with the sealing mechanism 4 on the rear side to quickly dissipate the heat of the cabinet at the rear side of the frequency converter cabinet 2. When the temperatures in different cabinets in the frequency converter cabinet 2 are similar, the control terminal controls the two electric shafts 8 to drive the adjacent air distributors 9 to swing and reset.

[0042] The technical principles of the embodiments of the present invention are described above in conjunction with specific embodiments. These descriptions are only for explaining the principles of the embodiments of the present invention and cannot be interpreted in any way as limiting the protection scope of the embodiments of the present invention. Based on the explanations herein, those skilled in the art can think of other specific implementation methods of the embodiments of the present invention without creative work, and these methods 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: The invention comprises a heat exchange body (1) and a frequency conversion cabinet (2), wherein the heat exchange body (1) is fixedly connected to and communicated with an air inlet (101) and an air outlet (102), the air inlet (101) is fixedly connected to and communicated with a connecting shell (3), the connecting shell (3) is fixedly connected to and communicated with the frequency conversion cabinet (2), a uniformly distributed temperature monitoring device is arranged in the frequency conversion cabinet (2), and a uniformly distributed blocking mechanism (4) is installed at the connection point between the frequency conversion cabinet (2) and the connecting shell (3), the blocking mechanism (4) is used to change the position of the connection point 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 to focus on heat dissipation at the position of the frequency conversion cabinet (2) where heat is seriously generated.

2. The air-water cooling device for a high-voltage frequency converter according to claim 1 is characterized in that: The blocking mechanism (4) comprises symmetrically distributed fixed plates (41), the fixed plates (41) being rotatably connected to the frequency conversion cabinet (2), the fixed plates (41) being fixedly connected to a limiting plate (46), the fixed plates (41) being provided with evenly distributed rotating plates (42), the fixed plates (41) being rotationally connected in a limiting manner to the rotating plates (42) close to the limiting plate (46), and a torsion spring being fixedly connected between the two, two adjacent rotating plates (42) being rotationally connected in a limiting manner, and a torsion spring being fixedly connected between the two, the limiting plate (46) being used to limit the rotating plate (42) on the adjacent fixed plates (41) which is farthest from the fixed plates, and an air guide gap (401) being provided between the two adjacent rotating plates (42), and the frequency conversion cabinet (2) being provided with a power component for driving the symmetrically distributed fixed plates (41) to rotate and open simultaneously.

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

4. The air-water cooling device for a high-voltage frequency converter according to claim 3 is characterized in that: The dragging assembly comprises symmetrically distributed winding rollers (6), the winding rollers (6) being fixedly connected to the adjacent rotating gears (51), the winding rollers (6) being wound with a dragging rope (7), the dragging rope (7) penetrating the adjacent fixed plate (41), the adjacent second pulley (53) and the frequency conversion cabinet (2), and the dragging rope (7) being fixedly connected to the rotating plate (42) on the adjacent blocking mechanism (4) which is farthest from the limiting plate (46).

5. The air-water cooling device for a high-voltage frequency converter according to claim 4, characterized in that: An air guide strip (43) is fixedly connected to the rotating plate (42), the air guide strip (43) corresponding one-to-one to the air guide gap (401) between two adjacent rotating plates (42), and the air guide strip (43) is used to block the corresponding air guide gap (401).

6. The air-water cooling device for a high-voltage frequency converter according to claim 5, characterized in that: The side of the air guide strip (43) away from the adjacent rotating plate (42) is flexible.

7. The air-water cooling device for a high-voltage frequency converter according to claim 6, characterized in that: A micro motor (45) is fixedly connected to one of the rotating plates (42), an 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 an adjacent rotating plate (42).

8. The air-water cooling device for a high-voltage frequency converter according to claim 7, characterized in that: The flow area of ​​the air guide head (44) gradually decreases from a side close to the adjacent micro motor (45) to a side away from the adjacent micro motor (45).

9. The air-water cooling device for a high-voltage frequency converter according to claim 2, characterized in that: It also includes symmetrically distributed electric rotating shafts (8), which are all fixedly connected to the connecting shell (3), and the electric rotating shafts (8) are fixedly connected to air distribution plates (9), which together divide the connection between the connecting shell (3) and the air inlet duct (101) into a plurality of flow channels.

10. The air-water cooling device for a high-voltage frequency converter according to claim 9, characterized in that: The air inlet duct (101) is fixedly connected with uniformly distributed first air induction heads (10), and the connecting shell (3) is fixedly connected with spaced second air induction heads (11), the number of the second air induction heads (11) is consistent with the number of the first air induction heads (10), the first air induction heads (10) are connected to the adjacent second air induction heads (11) through a hose, one of the fixed plates (41) corresponds to at least one of the second air induction heads (11), and the second air induction heads (11) are used to lift the fixed plate (41) and the rotating plate (42) thereon to form a cylindrical structure with an air suction effect.

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