Sealed frequency converter cooling device

Abstract

A sealed frequency converter cooling device comprises a shell, a frequency converter body arranged in the shell, and a cooling assembly arranged on the shell and used for cooling the frequency converter body. The shell comprises a box shell and a door plate rotationally arranged on the box shell. A first channel for protecting the cooling fan is arranged on the top face of the box shell, the side wall of the first channel communicates with a second channel, an air inlet is formed in one side of the second channel, and a filter screen is arranged on the air inlet. A cleaning assembly for removing dust of the filter screen is arranged on the second channel and comprises a sliding plate arranged in the second channel in a sliding mode and a driving device arranged on the second channel and used for driving the sliding plate to move, an air distributing pipe is arranged on the sliding plate, and the air distributing pipe communicates with a plurality of air outlet nozzles with air outlets facing the filter screen; and an air pump communicated with the air distributing pipe through a connecting pipe is arranged on the second channel. By arranging the cleaning assembly, dust accumulated on the filter screen can be removed, so that the cleaning work of the filter screen is completed, time and labor are saved, and the working efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the field of frequency converters, and particularly relates to a sealed frequency converter cooling device. Background Art

[0002] The frequency converter of a wind turbine is a core component connecting the wind turbine to the power grid. It is a power electronic device that controls the power output of the wind turbine by controlling the power devices in the device and adjusts the operating state of the wind turbine. Its working principle is to use the on-off action of power semiconductor devices to convert the power frequency power supply into an electric energy control device of another frequency. Currently, the frequency converters in use mainly adopt the AC-DC-AC method (VVVF frequency conversion or vector control frequency conversion). First, the power frequency AC power supply is converted into a DC power supply through a rectifier, and then the DC power supply is converted into an AC power supply with controllable frequency and voltage to supply the motor.

[0003] The frequency converter in the wind turbine generates heat during operation. To protect the internal circuit of the frequency converter, it is necessary to cool it down. The existing method for cooling the frequency converter is to directly blow the frequency converter with a fan for cooling. And to prevent dust from entering the frequency converter and the fan, a filter screen is set outside the fan. However, dust will accumulate on the surface of the filter screen after long-term use, and then it is necessary to manually disassemble the filter screen for cleaning, which is time-consuming and cumbersome to operate. Summary of the Invention

[0004] The purpose of the present invention is to provide a sealed frequency converter cooling device to solve the technical problems raised in the above background art.

[0005] To achieve the above purpose, the specific technical solution of a sealed frequency converter cooling device of the present invention is as follows:

[0006] A sealed frequency converter cooling device includes a housing, a frequency converter body disposed inside the housing, and a cooling and temperature reduction component disposed on the housing to cool the frequency converter body. The housing includes a box shell and a door panel rotatably disposed on the box shell. The cooling and temperature reduction component includes a first mounting plate disposed at the top of the box shell, and a cooling fan is provided on the first mounting plate. A first channel for protecting the cooling fan is provided on the top surface of the box shell, and a second channel is communicated with the side wall of the first channel. An air inlet is opened on one side of the second channel, and a filter screen is provided on the air inlet. A cleaning component for removing dust from the filter screen is provided on the second channel, and the cleaning component includes a sliding plate slidably disposed in the second channel, a driving device disposed on the second channel for driving the sliding plate to move, a manifold is disposed on the sliding plate, and a plurality of air outlet nozzles with air outlets facing the filter screen are communicated with the manifold. And an air pump communicated with the manifold through a connecting pipe is provided on the second channel.

[0007] Further, an air flow assisted cooling part is provided on the bottom surface of the first mounting plate. The air flow assisted cooling part includes a curtain cloth provided on the bottom surface of the first mounting plate. A second mounting plate is provided on the bottom surface of the curtain cloth. A plurality of air outlet cylinders are distributed on the second mounting plate, and a conical cylinder is communicated with the bottom end of each air outlet cylinder.

[0008] Further, an adjusting component is provided on the side wall of the box shell. The adjusting component includes connecting shafts symmetrically arranged with respect to the longitudinal center line of the box shell. The connecting shafts are connected to the side wall of the second mounting plate. A connecting rod is provided at the outer end of the connecting shaft. A fixing plate is provided on the outer wall of the box shell. A fixing ring is rotatably provided on the fixing plate. A first electric push rod is sleeved on the fixing ring, and the first electric push rod is rotatably connected to the connecting rod.

[0009] Further, the driving device includes a motor provided on the side wall of the second channel, a screw rod rotatably provided on the second channel. The screw rod is arranged along the length direction of the second channel. The motor is connected to the screw rod. The screw rod penetrates through the sliding plate and is threadedly connected thereto.

[0010] Further, a dust collecting device is provided on the first channel. The dust collecting device includes second electric push rods symmetrically arranged with respect to the longitudinal center line of the first channel. Each second electric push rod is located on one side of the second channel. The telescopic ends of the two second electric push rods are provided with support ears. The two support ears are connected through a protective cover. The protective cover is matched with the second channel. A third channel is communicated with the bottom surface of the protective cover, and a dust collecting bag is communicated with the bottom surface of the third channel.

[0011] Further, a blocking component for controlling its opening and closing is provided in the third channel. The blocking component includes a connecting plate detachably provided in the third channel through bolts. An installation ring is detachably provided on the connecting plate through bolts. A rotating shaft is rotatably provided on the installation ring. A sealing plate is provided on the rotating shaft. A support plate for cooperating with the connecting plate is provided on the top surface of the sealing plate. A torsion spring is sleeved on the rotating shaft. One end of the torsion spring is connected to the connecting plate, and the other end is connected to the sealing plate.

[0012] Further, support frames are symmetrically arranged with respect to the longitudinal center line of the first channel, and the support ears are slidably arranged on the support frames.

[0013] The sealed inverter cooling device of the present invention has the following advantages:

[0014] 1. By providing a cleaning component, the present invention can remove the dust accumulated on the filter screen, thereby completing the cleaning work of the filter screen, saving time and effort and improving work efficiency.

[0015] 2. By providing a dust collecting device, the present invention can collect the dust cleaned from the filter screen, preventing the dust cleaned from the filter screen from floating in the air and causing environmental pollution. Description of the Drawings

[0016] Figure 1Schematic structural diagram of a sealed frequency converter cooling device of the present invention;

[0017] Figure 2 Schematic structural diagram of the temperature reduction component and the air flow assisted temperature reduction part of the present invention;

[0018] Figure 3 Schematic diagram of the adjustment component of the present invention;

[0019] Figure 4 Schematic diagram of the protective cover, the third channel, the dust collection bag, the second electric push rod and the ear of the present invention;

[0020] Figure 5 Schematic diagram of the cleaning component of the present invention;

[0021] Figure 6 Schematic diagram of the connecting plate and the support plate of the present invention;

[0022] Figure 7 Schematic diagram of the plugging component of the present invention.

[0023] Explanation of the marks in the figure:

[0024] 1. Box shell; 2. Door panel; 3. Temperature reduction component; 31. First mounting plate; 32. Temperature reduction fan; 4. Adjustment component; 41. Connecting shaft; 42. Link rod; 43. First electric push rod; 44. Fixed ring; 45. Fixed plate; 5. First channel; 6. Second channel; 7. Filter screen; 8. Cleaning component; 81. Slide plate; 82. Branch air pipe; 83. Air outlet nozzle; 84. Air pump; 85. Driving device; 851. Motor; 852. Screw rod; 9. Protective cover; 10. Third channel; 11. Dust collection bag; 12. Second electric push rod; 13. Ear; 14. Plugging component; 141. Connecting plate; 142. Rotating shaft; 143. Sealing plate; 144. Mounting ring; 145. Rotating spring; 146. Support plate; 15. Air flow assisted temperature reduction part; 151. Curtain cloth; 152. Second mounting plate; 153. Air outlet cylinder; 154. Conical cylinder; 16. Support frame. Detailed implementation manners

[0025] In order to better understand the purpose, structure and function of the present invention, the following further describes in detail a sealed frequency converter cooling device of the present invention with reference to the accompanying drawings.

[0026] As Figures 1 to 7As shown in the figure, a sealed cooling device for a frequency converter according to the present invention includes a housing, a frequency converter body disposed inside the housing, and a temperature reduction component disposed on the housing for cooling the frequency converter. Specifically, the housing includes a box body 1 and a door panel 2 rotatably disposed on the box body 1. The front end of the box body 1 is open, which facilitates the installation of the frequency converter body inside the box body 1, and the door panel 2 is installed at the opening of the box body 1 to block the opening of the box body 1. Among them, the temperature reduction component includes a first mounting plate 31 disposed at the top of the box body 1, and a temperature reduction fan 32 connected to an external power supply is disposed on the first mounting plate 31. When the temperature reduction fan 32 operates, blowing the external air into the box body 1 can cool the frequency converter body, and the operation is simple and convenient to use.

[0027] In order to prevent dust from accumulating on the frequency converter and the cooling fan, a first channel 5 for protecting the temperature reduction fan 32 is provided on the top surface of the box body 1, and a second channel 6 is communicated with the side wall of the first channel 5, and an air inlet is opened on one side of the second channel 6, and a filter screen 7 is provided on the air inlet. Before the external air enters the box body 1 to blow and cool the frequency converter body, the air will first pass through the filter screen 7 and then enter the box body 1 through the second channel 6 and the third channel 10. When the air passes through the filter screen 7, the dust in the air can be filtered, so as to purify the air.

[0028] Preferably, a cleaning component 8 for removing dust from the filter screen 7 is provided on the second channel 6. The dust and other impurities on the filter screen 7 can be cleaned by the cleaning component 8, saving the process and time of manually cleaning the filter screen 7 and improving work efficiency. Specifically, the cleaning component 8 includes a slide plate 81 slidably disposed in the second channel 6, and the slide plate 81 slides along the length direction of the second channel 6. A driving device 85 for driving the slide plate 81 to move is also provided on the second channel 6. At the same time, an air distribution pipe 82 is provided on the slide plate 81 along the height direction thereof, the air distribution pipe 82 is arranged towards the filter screen 7, and a plurality of air outlet nozzles 83 with air outlets facing the filter screen 7 are communicated with the air distribution pipe 82. An air pump 84 communicated with the air distribution pipe 82 through a connecting pipe is provided on the top surface of the second channel 6, and the air pump 84 is powered on by being connected to an external power supply.

[0029] When starting the cleaning work on the filter screen 7, the cooling fan 32 needs to be stopped. Then, the driving device 85 is started. The driving device 85 drives the air distribution pipe 82 to move in the second channel 6 through the sliding plate 81. While the driving device 85 is working, the air pump 84 also starts to work. Then, the air pump 84 transports gas into the air distribution pipe 82 through the connecting pipe. The gas is then sprayed onto the filter screen 7 through the air outlet nozzle 83. The gas sprayed from the air outlet nozzle 83 will blow off the dust and other impurities on the filter screen 7, thus achieving the purpose of cleaning the filter screen 7. Of course, the movement of the sliding plate 81 in the second channel 6 enables the nozzle to blow and clean the entire filter screen 7. It should be noted that the connecting pipe is a flexible pipe. When the sliding plate 81 drives the air distribution pipe 82 to move, the connecting pipe will change with the movement of the air distribution pipe 82 to facilitate the continuous transportation of the gas in the air pump 84 into the air distribution pipe 82.

[0030] As Figure 5 shown, the driving device 85 includes a motor 851 provided on the side wall of the second channel 6. The motor 851 is connected to an external power supply. A screw rod 852 is rotatably provided in the second channel 6 along its length direction. Both ends of the screw rod 852 penetrate the side wall of the second channel 6 and are rotatably arranged therewith. Moreover, the screw rod 852 penetrates the sliding plate 81 and is threadedly connected thereto. And the motor 851 is connected to one end of the screw rod 852. When the motor 851 is started, the motor 851 drives the screw rod 852 to rotate. When the screw rod 852 rotates, the sliding plate 81 threadedly connected to the screw rod 852 will move in the second channel 6. At the same time, the air distribution pipe 82 provided on the sliding plate 81 and the air outlet nozzle 83 provided on the air distribution pipe 82 will also move accordingly, thereby completing the cleaning work on the entire filter screen 7. Among them, the driving device 85 can also be replaced with a telescopic cylinder or other devices that can be telescoped.

[0031] As a further improvement, a dust collection device is provided on the first channel 5. The dust collection device includes second electric push rods 12 symmetrically arranged on the longitudinal center line of the first channel 5 and connected to an external power supply. The second electric push rods 12 are arranged in the direction of the second channel 6, that is, each second electric push rod 12 is located on one side of the second channel 6. Ears 13 are further provided on the telescopic ends of the two second electric push rods 12, and the two ears 13 are connected by a protective cover 9. The protective cover 9 cooperates with the second channel 6, that is, the opening of the protective cover 9 faces the direction of the second channel 6, and the size of the opening of the protective cover 9 is adapted to the external contour size of the second channel 6, so that the protective cover 9 can be buckled in the second channel 6, and the second channel 6 can be inserted into the opening of the protective cover 9. A third channel 10 is also communicated with the bottom surface of the protective cover 9, and a dust collection bag 11 is communicated with the bottom surface of the third channel 10. Before the cleaning component 8 cleans the filter screen 7, first start the second electric push rod 12, and the second electric push rod 12 drives the protective cover 9 to approach the second channel 6 through the ear 13, and the opening of the protective cover 9 is buckled on the second channel 6, so that the filter screen 7 is located inside the protective cover 9. Then start the cleaning component 8 to clean the filter screen 7. The dust and impurities cleaned off will enter the dust collection bag 11 through the protective cover 9 and the third channel 10, and the dust and impurities are collected by the dust collection bag 11, which is convenient for unified cleaning later.

[0032] As Figure 6As shown in the figure, a plugging component 14 for controlling its opening and closing is provided in the third channel 10. Through the plugging component 14, the dust and impurities in the dust collection bag 11 can be plugged to prevent the dust and impurities in the dust collection bag 11 from flying into the air through the second channel 6. Specifically, the plugging component 14 includes a connecting plate 141 detachably arranged in the third channel 10 by bolts, and an installation ring 144 is detachably arranged on the connecting plate 141 by bolts. A rotating shaft 142 is rotatably arranged on the installation ring 144. A sealing plate 143 is arranged on the rotating shaft 142. A support plate 146 cooperating with the connecting plate 141 is arranged on the top surface of the sealing plate 143. A torsion spring 145 is sleeved on the rotating shaft 142. One end of the torsion spring 145 is connected to the connecting plate 141, and the other end is connected to the sealing plate 143. Among them, the setting of the support plate 146 can limit the sealing plate 143, so that the sealing plate 143 can only rotate downward, and the height of the support plate 146 is higher than the inner bottom surface of the protective cover 9. When in use, when the second electric push rod 12 drives the third channel 10 to approach the second channel 6 through the protective cover 9, the second channel will push the support plate 146, so that the support plate 146 drives the rotating shaft 142 to rotate. When the rotating shaft 142 rotates, the sealing plate 143 arranged on the rotating shaft 142 will rotate downward, so that the sealing plate 143 releases the closure of the third channel 10. Then the dust and impurities on the filter screen 7 will enter the dust collection bag 11 through the protective cover 9 and the third channel 10. When the second electric push rod 12 drives the third channel 10 to move to the initial position through the protective cover 9, the torsion spring 145 drives the sealing plate 143 and the support plate 146 to move to the initial position. In order to improve the stability of the second electric push rod 12 driving the protective cover 9 and each component on the protective cover 9 to move, support frames 16 are symmetrically arranged on the first channel 5 with its longitudinal center line, and the support ears 13 are slidably arranged with the support frames 16.

[0033] As another preferred embodiment, an air flow assisted cooling part 15 is arranged on the bottom surface of the first mounting plate 31. Through the air flow assisted cooling part 15, the air conveyed by the cooling fan 32 can be cooled again, so as to better cool the frequency converter. Specifically, the air flow assisted cooling part 15 includes a curtain cloth 151 arranged on the bottom surface of the first mounting plate 31. A second mounting plate 152 is arranged on the bottom surface of the curtain cloth 151. A plurality of air outlet cylinders 153 are distributed on the second mounting plate 152, and a conical cylinder 154 is communicated with the bottom end of each air outlet cylinder 153. The cooling fan 32 blows the outside air into the curtain cloth 151, and the air entering the curtain cloth 151 will enter each air outlet cylinder 153, and then is blown onto the frequency converter body through the conical cylinder 154 of each air outlet cylinder 153. Among them, the flow rate of the air will increase when passing through the conical cylinder 154, and the temperature of the accelerated air will drop. In this way, the cold air generated by the cooling fan 32 can be cooled again and then blown onto the frequency converter body, so as to better cool the frequency converter body.

[0034] In order to expand the cooling range of the cooling component for the frequency converter, an adjusting component 4 is provided on the side wall of the cabinet 1. The adjusting component 4 includes a connecting shaft 41 symmetrically arranged with respect to the longitudinal midline of the cabinet 1, and the connecting shaft 41 is connected to the side wall of the second mounting plate 152. A connecting rod 42 is provided at the outer end of the connecting shaft 41, and a fixing plate 45 is provided on the outer wall of the cabinet 1. A fixing ring 44 is rotatably provided on the fixing plate 45, and a first electric push rod 43 connected to an external power supply is sleeved on the fixing ring 44. The first electric push rod 43 is rotatably connected to the connecting rod 42. When the first electric push rod 43 works, it will drive the connected connecting shaft 41 to rotate through the connecting rod 42, and the rotation of the connecting shaft 41 will drive the second mounting plate 152 to rotate, and the air outlet cylinder 153 provided on the second mounting plate 152 will move accordingly, so as to increase the blowing range of the cold air and improve the practicability of the device. It should be noted that a margin is reserved for the curtain cloth 151 between the first mounting plate 31 and the second mounting plate 152 for the rotation of the second mounting plate 152.

[0035] Usage method: Start the cooling component to cool the frequency converter body in the cabinet 1. When the filter screen 7 needs to be cleaned, the cooling fan 32 in the cooling component stops rotating, and the dust collection component is started. The second electric push rod 12 in the dust collection component drives the protective cover 9 to be buckled with the second channel 6 through the ear 13, and then the cleaning component 8 is started. The air pump 84 in the cleaning component 8 conveys gas into the sub-air pipe 82 through the connecting pipe, and the gas in the sub-air pipe 82 is sprayed onto the filter screen 7 through the air outlet nozzle 83. At the same time, the driving device 85 drives the sliding plate 81, the sub-air pipe 82 and the air outlet nozzle 83 to move, so that the air outlet nozzle 83 cleans the whole filter screen 7, and the cleaned dust enters the dust collection bag 11 through the protective cover 9 and the third channel 10 for collection.

[0036] It can be understood that the present invention is described through some embodiments. Those skilled in the art know that without departing from the spirit and scope of the present invention, various changes or equivalent replacements can be made to these features and embodiments. In addition, under the teaching of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present invention.

Claims

1. A sealed inverter cooling device, characterized in that: It comprises a housing, a frequency converter body arranged in the housing, and a cooling component (3) arranged on the housing for cooling the frequency converter body; The outer shell comprises a box shell (1) and a door panel (2) rotatably arranged on the box shell (1); The cooling component (3) comprises a first mounting plate (31) arranged at the top end of the housing (1), and a cooling fan (32) is arranged on the first mounting plate (31); The top surface of the box shell (1) is provided with a first channel (5) for protecting the cooling fan (32), and the side wall of the first channel (5) is connected to a second channel (6), and an air inlet is opened on one side of the second channel (6), and a filter screen (7) is provided on the air inlet; A cleaning assembly (8) for removing dust from the filter (7) is provided on the second channel (6), and the cleaning assembly (8) comprises a slide plate (81) slidably arranged in the second channel (6), a driving device (85) arranged on the second channel (6) for driving the slide plate (81) to move, an air distribution pipe (82) is provided on the slide plate (81), and the air distribution pipe (82) is connected to an air outlet nozzle (83) with a plurality of air outlets facing the filter (7), and an air pump (84) is provided on the second channel (6) and is connected to the air distribution pipe (82) through a connecting pipe.

2. A sealed inverter cooling device according to claim 1, characterized in that: An airflow-assisted cooling portion (15) is provided on the bottom surface of the first mounting plate (31), and the airflow-assisted cooling portion (15) comprises a curtain (151) provided on the bottom surface of the first mounting plate (31), and a second mounting plate (152) is provided on the bottom surface of the curtain (151), and a plurality of air outlet tubes (153) are distributed on the second mounting plate (152), and a conical tube (154) is connected to the bottom end of each air outlet tube (153).

3. A sealed inverter cooling device according to claim 2, characterized in that: The side wall of the box shell (1) is provided with an adjustment assembly (4), and the adjustment assembly (4) includes a connecting shaft (41) symmetrically arranged with respect to the longitudinal center line of the box shell (1), and the connecting shaft (41) is connected to the side wall of the second mounting plate (152), a connecting rod (42) is provided at the outer end of the connecting shaft (41), and a fixing plate (45) is provided on the outer wall of the box shell (1), a fixing ring (44) is rotatably provided on the fixing plate (45), a first electric push rod (43) is sleeved on the fixing ring (44), and the first electric push rod (43) is rotatably connected to the connecting rod (42).

4. A sealed inverter cooling device according to any one of claims 1 to 3, characterized in that: The driving device (85) comprises a motor (851) arranged on the side wall of the second channel (6), which rotates a screw rod (852) arranged on the second channel (6), wherein the screw rod (852) is arranged along the length direction of the second channel (6), and the motor (851) is connected to the screw rod (852); The screw rod (852) passes through the slide plate (81) and is threadedly connected thereto.

5. A sealed inverter cooling device according to claim 1, It is characterized by: The first channel (5) is provided with a dust collecting device, and the dust collecting device comprises a second electric push rod (12) symmetrically arranged on the first channel (5) along its longitudinal midline, each second electric push rod (12) being located on one side of the second channel (6), and a support ear (13) being provided at the telescopic end of the two second electric push rods (12), and the two support ears (13) being connected through a protective cover (9), and the protective cover (9) being matched with the second channel (6); The bottom surface of the protective cover (9) is connected to a third channel (10), and the bottom surface of the third channel (10) is connected to a dust collecting bag (11).

6. A sealed inverter cooling device according to claim 5, characterized in that; The third channel (10) is provided with a blocking assembly (14) for controlling the opening and closing thereof, and the blocking assembly (14) comprises a connecting plate (141) detachably provided in the third channel (10) by means of bolts, a mounting ring (144) detachably provided on the connecting plate (141) by means of bolts, a rotating shaft (142) rotatably provided on the mounting ring (144), a sealing plate (143) provided on the rotating shaft (142), a supporting plate (146) matched with the connecting plate (141) provided on the top surface of the sealing plate (143), and a rotating spring (145) sleeved on the rotating shaft (142), one end of the rotating spring (145) being connected to the connecting plate (141), and the other end being connected to the sealing plate (143).

7. A sealed inverter cooling device according to claim 6, It is characterized by: A support frame (16) is symmetrically arranged on the first channel (5) along its longitudinal midline, and the support ear (13) and the support frame (16) are slidably arranged.

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