CN114273339B - Variable frequency drive - Google Patents
Variable frequency drive Download PDFInfo
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- CN114273339B CN114273339B CN202111645115.2A CN202111645115A CN114273339B CN 114273339 B CN114273339 B CN 114273339B CN 202111645115 A CN202111645115 A CN 202111645115A CN 114273339 B CN114273339 B CN 114273339B
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Abstract
The invention provides a variable frequency driver, belonging to the field of driver equipment manufacture; the invention comprises the following steps: the device comprises a box body, an electrostatic dust collection device and a circulating wiping device; the bottom of the box body is horizontally provided with an air inlet cavity, and the electrostatic dust collection device and the circulating wiping device are arranged in the air inlet cavity; the inlet chamber having an inlet and an outlet; an air inlet fan is arranged at the inlet, and an exhaust fan is arranged at the outlet; the circulating wiping device comprises: the filter cloth and the two parallel rollers; the filter cloth is connected with the roller; the electrostatic dust collector has positive plate and negative plate; the positive plate and the negative plate are respectively positioned at the upper side and the lower side of the air inlet cavity; the positive plate is positioned between the two rollers and is attached to the filter cloth. According to the invention, the electrostatic dust collection device is arranged at the inlet of the variable-frequency driver to carry out electrostatic dust collection, and the dust deposited on the anode plate can be effectively removed by utilizing the circulating wiping device, so that the electrostatic dust collection effect is ensured to the maximum extent, and the fault rate of the frequency converter is greatly reduced.
Description
Technical Field
The invention relates to a manufacturing technology of a variable frequency driver, in particular to a variable frequency driver, and belongs to the technical field of manufacturing of electric control frequency modulation equipment.
Background
Variable frequency drives are a type of electronic controller designed to vary the frequency and voltage supplied to an ac motor, which will result in a change in the rotational speed of the motor as required. The variable frequency drive base system includes an AC motor, a controller, and an operator interface. Frequency converters are commonly used in three-phase induction motors because of their versatility and cost-effectiveness compared to single-phase or synchronous motors.
The dust can seriously affect the variable frequency driver, the dust is attached to the surface of the circuit board of the frequency converter, the circuit board is corroded when the dust encounters humid air, the time is long, the short circuit or the short circuit of components of the circuit board can be caused, the frequency converter is damaged, and the problems of fire and personal safety can be caused under the serious condition. The common method for preventing dust is to strengthen the protection of the cabinet body and directly block the dust from diffusing into the cabinet body. However, even if the frequency conversion driver needs to be regularly maintained and dedusted, the dust attached to the circuit board and the radiating fins in the frequency conversion driver can be directly blown off by workers by using the electric blower, but the wind area in the frequency conversion driver is limited, the dedusting effect on a region with a more deviated position is poor, and the overall dedusting effect is affected.
Disclosure of Invention
The invention provides a novel variable frequency driver, which can solve the technical problem of poor dust removal effect of a frequency converter in the prior art by arranging an electrostatic dust removal device and a circulating wiping device.
The variable frequency drive of the embodiment of the invention comprises: the device comprises a box body, an electrostatic dust collection device and a circulating wiping device; an air inlet cavity is horizontally arranged at the bottom of the box body in a transverse mode, and the electrostatic dust collection device and the circulating wiping device are arranged in the air inlet cavity; the inlet chamber having an inlet and an outlet; an air inlet fan is arranged at the inlet, and an exhaust fan is arranged at the outlet;
the circulating wiping apparatus includes: the device comprises a filter cloth and two parallel rollers; one end of the filter cloth is wound on one of the rollers, and the other end of the filter cloth is connected with the other roller;
the electrostatic dust collector is provided with a positive plate and a negative plate; the positive plate and the negative plate are respectively positioned at the upper side and the lower side of the air inlet cavity; the positive plate is positioned between the two rollers and is attached to the filter cloth.
The variable frequency drive is characterized in that an ultrasonic atomizer is further arranged in the box body; the ultrasonic atomizer is provided with an atomization outlet; the atomization outlet is connected with the air inlet cavity, and the atomization outlet is close to the air inlet fan.
The variable frequency drive as described above, wherein the two rollers are a driven roller and a driving roller respectively; a tension device is arranged between the driven roller and the driving roller;
the driven roller is provided with a driven shaft, and a damping device is arranged on the driven shaft; the driving roller is provided with a driving shaft, and a driving motor is arranged on the driving shaft.
The variable frequency drive as described above, wherein a humidification chamber is provided on the inlet; the atomization outlet is connected with the air inlet cavity through the humidification cavity;
the humidifying cavity is provided with a first end and a second end, and the air inlet fan is positioned at the first end; the driving roller is located at the second end, and the driving roller is located below the atomization outlet.
The variable frequency driver is characterized in that the outlet is provided with a filter cavity, and a filter screen is arranged in the filter cavity; the filter cavity is connected with the air inlet cavity through the filter screen; a rectifying cavity is also arranged in the box body; one end of the rectifying cavity faces the filter cavity, and the other end of the rectifying cavity faces the box body;
the exhaust fan is arranged in the rectifying cavity; the rectification cavity is located above the air inlet cavity, and the rectification cavity is connected with the filter cavity through the filter screen.
The variable-frequency driver comprises a negative plate, a negative plate and a variable-frequency drive, wherein the negative plate is fixed at the bottom of the air inlet cavity; the bottom of negative plate is provided with the mounting, the negative plate passes through this mounting to be installed in the air intake intracavity.
The variable frequency drive is characterized in that the filter cloth is provided with uniformly distributed scraping blades; the scraping blade is positioned on one side of the filter cloth facing the positive plate.
The variable frequency drive as described above, wherein the positive and negative plates are parallel to each other, the circulating wiping device being located between the positive and negative plates;
the two rollers are respectively positioned at two sides of the positive plate.
The variable frequency driver, wherein the top of box is provided with the exhaust fan, the exhaust fan with the air exhauster is located respectively the both sides of box.
The variable frequency drive as described above, wherein the exhaust fan and the intake fan are both located on the same side.
In the embodiment of the invention, the electrostatic dust removal device is arranged at the inlet of the variable frequency drive to carry out electrostatic dust removal, and the circulating wiping device can be effectively utilized to remove dust deposited on the anode plate, so that the electrostatic dust removal effect is ensured to the maximum extent, and the fault rate of the frequency converter is greatly reduced.
In addition, because one end of the filter cloth for wiping is wound on one roller, after the filter cloth runs for a long time, the completely abandoned filter cloth can be wound on the other roller, and the maintenance operation can be completed only by replacing the two rollers, so that the inconvenience of the maintenance operation is avoided to the maximum extent.
Drawings
Fig. 1 is a side structural view of a variable frequency drive according to an embodiment of the present invention.
Detailed Description
The variable frequency drive of the present invention may be made of, and is not limited to, the following materials and components, for example: filter cloth, a roller, a high-voltage static electricity generating device, a filter screen, a fan, a humidifying cavity, a fiber spraying and dissolving filter screen and the like.
Fig. 1 is a side structural view of a variable frequency drive according to an embodiment of the present invention; the variable frequency drive of the present embodiment includes: the device comprises a box body 1, an electrostatic dust collection device and a circulating wiping device; an air inlet cavity 10 is horizontally arranged at the bottom of the box body 1 in a transverse mode, and the electrostatic dust collection device and the circulating wiping device are both arranged in the air inlet cavity 10; the air inlet cavity is a horizontally transverse tubular structure.
The inlet chamber 10 has an inlet and an outlet; the inlet is provided with a fan 2, and the outlet is provided with an exhaust fan 7; the air intake fan 2 is used for sucking fresh air from the outside, and the air exhaust fan 7 is used for introducing clean air treated in the air intake chamber 10 into the box body 1.
The circulating wiping apparatus includes: a filter cloth 30, and two rollers parallel to each other; one end of the filter cloth 30 is wound on one of the rollers, and the other end of the filter cloth is connected with the other roller; in practice, the filter cloth 30 is completely wound around one drum, and the other drum is connected to the remaining end of the filter cloth to wind the filter cloth on the previous drum. The filter cloth 30 is a spray-dissolving fiber cloth with good insulating property, and can effectively absorb and contain dust.
The filter cloth 30 is mainly used for wiping the positive electrode plate 4, so as to prevent excessive dust from being deposited on the positive electrode plate 4, thereby reducing the working efficiency of the positive electrode plate 4.
Generally, the filter cloth 30 is provided with uniformly distributed scrapers, which are generally hard rubber scrapers; the wiper is located on the side of the filter cloth 30 facing the positive plate 4 to increase the cleaning effect.
The electrostatic dust removal device is provided with a positive plate 4 and a negative plate 5; the positive plate 4 and the negative plate 5 are respectively positioned at the upper side and the lower side of the air inlet cavity 10; the positive plate 4 is positioned between the two rollers and is attached to the filter cloth 30.
In the variable-frequency driver of the embodiment, the positive electrode plate 4 and the negative electrode plate 5 are parallel to each other, and the circulating wiping device is positioned between the positive electrode plate 4 and the negative electrode plate 5; the two rollers are respectively positioned at two sides of the positive plate 4.
Electrostatic dust removal is one of the methods of gas dust removal. The dust-containing gas is electrically separated when passing through a high-voltage electrostatic field between the positive plate 4 and the negative plate 5, and dust particles are charged negatively in combination with negative ions and tend to discharge on the surface of the positive plate 4 to be deposited. In the metallurgical, chemical and other industries to purify gases or recover useful dust particles. A dust collecting method in which gas is ionized by an electrostatic field to thereby electrically adsorb dust particles to an electrode. The principle of electrostatic dust collection is that air molecules are ionized into positive ions and electrons in a strong electric field, and the electrons encounter dust particles in the process of running to a positive electrode, so that the dust particles are negatively charged and adsorbed to the positive electrode to be collected.
After current electrostatic precipitator device normally worked a period, can accumulate the dust on the dust collecting plate, need the manual work to dismantle the washing, otherwise can influence its dust removal effect.
In the embodiment of the invention, the electrostatic dust removal device is arranged at the inlet of the variable frequency drive to carry out electrostatic dust removal, and the circulating wiping device can be effectively utilized to remove dust deposited on the anode plate, so that the electrostatic dust removal effect is ensured to the maximum extent, and the fault rate of the frequency converter is greatly reduced.
In addition, because one end of the filter cloth for wiping is wound on one roller, after the filter cloth runs for a long time, the completely abandoned filter cloth can be wound on the other roller, and the maintenance operation can be completed only by replacing the two rollers, so that the inconvenience of the maintenance operation is avoided to the maximum extent.
In the variable frequency driver of this embodiment, an ultrasonic atomizer 8 is further disposed in the case 1; the ultrasonic atomizer 8 has an atomizing outlet 80; the atomization outlet 80 is connected with the air inlet cavity 10, and the atomization outlet 80 is arranged close to the air inlet fan 2, so that the air entering the air inlet cavity 10 is immediately wetted.
It should be noted that, in order to enhance the electrostatic dust removal effect, the sucked air must maintain a proper humidity; in addition, the water droplets generated by the ultrasonic atomization can not only humidify air, but also humidify the filter cloth 30, so that the filter cloth 30 can absorb more dust, and the wiping effect on the positive plates 4 is better.
In addition, the higher humidity can not only improve the electrostatic dust removal effect, but also can automatically deposit large-particle dust; and the specific heat capacity of air can be increased, so that the air cooling and heat dissipation effect is better.
In this embodiment, the two rollers are a driven roller 31 and a driving roller 32; a tension device is arranged between the driven roller 31 and the driving roller 32, so that the filter screen 30 is tightly attached to the positive plate 4.
The driven roller 31 is provided with a driven shaft, and a damping device is arranged on the driven shaft to match with a tensioning device to keep the filter screen smooth; the driving roller 32 is provided with a driving shaft on which a driving motor is arranged so as to drive the driving roller 32 to automatically rotate, so as to wipe the positive plate 4 through the filter screen 30, and further to wind and arrange the wiped filter screen.
Further, a humidifying cavity 20 is arranged on the inlet; the atomization outlet 80 is connected with the air inlet chamber 10 through the humidification chamber 20;
the humidification chamber 20 has a first end and a second end, the fan 2 is located at the first end; the drive roller 32 is located at the second end and the drive roller is located below the atomization outlet 80.
Because one end of the active drum 32 is located in the humidifying chamber 20, large-particle dust can be deposited on the filter screen 30 near the active drum, and because the active drum is located below the atomizing outlet 80, the air filtered from large-particle dust flows into the electrostatic dust removal device from the active drum, so that the work load of the electrostatic dust removal device is greatly reduced.
In this embodiment, a filtering cavity 60 is arranged at the outlet, and a filter screen 6 is arranged in the filtering cavity 60; the filter chamber 60 is connected with the air inlet chamber 10 through the filter screen 6; a rectification cavity 70 is also arranged in the box body 1; one end of the rectifying cavity 70 faces the filter cavity 60, and the other end faces the inside of the box body 1;
the exhaust fan 7 is arranged in the rectification cavity 70; the rectification chamber 70 is positioned above the air inlet chamber 10, and the rectification chamber 70 is connected with the filter chamber 60 through the filter screen 6.
As shown in figure 1, air after electrostatic dust collection firstly enters the filter cavity 60 from the lower part of the filter screen 6, and then is sucked into the box body 1 after passing through the upper part of the filter screen 6 by the exhaust fan 7 in the rectification cavity 70, so that the effect of filtering the air twice by using one filter screen 6 is realized, the cost performance is greatly enhanced, and the integral structure is simple.
In the variable frequency driver of the embodiment, the negative plate 5 is fixed at the bottom of the air inlet cavity 10; the bottom of the negative electrode plate 5 is provided with a fixing member 50, and the negative electrode plate 5 is mounted in the intake chamber 10 through the fixing member 50. The fixing member 50 is used for separating the gap between the negative plate 5 and the bottom of the air inlet cavity 10, so as to ensure that air passes through the space between the positive plate and the negative plate.
The variable frequency drive of this embodiment, it is preferred, the top of box 1 is provided with exhaust fan 90, exhaust fan 90 with air exhauster 7 is located respectively the both sides of box 1. Thereby enabling clean air to flow in the box body to take away more heat
Preferably, the exhaust fan 90 and the intake fan 2 are both located on the same side of the housing 1, so that clean air may be sucked by the intake fan 2 again after being exhausted, thereby prolonging the service life of the device.
In addition, the variable frequency driver of the invention has low manufacturing cost, small size, delicacy, compact structural design, stable finished product quality and convenient maintenance and repair, and is suitable for the box body design of various modified variable frequency drivers.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments. Through the above description of the embodiments, those skilled in the art will clearly understand that the above embodiment method can be implemented by some modifications plus the necessary general technical overlap; of course, the method can also be realized by simplifying some important technical features in the upper level. Based on such understanding, the technical solution of the present invention essentially or contributing to the prior art is: the whole structure and the connection mode are matched with the structure of each embodiment of the invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. A variable frequency drive, comprising: the device comprises a box body, an electrostatic dust collection device and a circulating wiping device; an air inlet cavity is horizontally and transversely arranged at the bottom of the box body, and the electrostatic dust collection device and the circulating wiping device are arranged in the air inlet cavity; the inlet chamber having an inlet and an outlet; an air inlet fan is arranged at the inlet, and an exhaust fan is arranged at the outlet;
the circulating wiping apparatus includes: the filter cloth and the two parallel rollers; one end of the filter cloth is wound on one of the rollers, and the other end of the filter cloth is connected with the other roller;
the electrostatic dust removal device is provided with a positive plate and a negative plate; the positive plate and the negative plate are respectively positioned at the upper side and the lower side of the air inlet cavity; the positive plate is positioned between the two rollers and is attached to the filter cloth;
an ultrasonic atomizer is also arranged in the box body; the ultrasonic atomizer is provided with an atomization outlet; the atomization outlet is connected with the air inlet cavity and is arranged close to the air inlet fan;
the two rollers are respectively a driven roller and a driving roller; a tension device is arranged between the driven roller and the driving roller;
the driven roller is provided with a driven shaft, and a damping device is arranged on the driven shaft; the driving roller is provided with a driving shaft, and a driving motor is arranged on the driving shaft;
a humidifying cavity is arranged on the inlet; the atomization outlet is connected with the air inlet cavity through the humidification cavity;
the humidifying cavity is provided with a first end and a second end, and the air inlet fan is positioned at the first end; the drive roller is located at the second end, and the drive roller is located below the atomization outlet.
2. The variable frequency drive of claim 1, wherein the outlet is provided with a filter cavity in which a filter screen is disposed; the filter cavity is connected with the air inlet cavity through the filter screen; a rectifying cavity is also arranged in the box body; one end of the rectifying cavity faces the filter cavity, and the other end of the rectifying cavity faces the box body;
the exhaust fan is arranged in the rectification cavity; the rectification cavity is positioned above the air inlet cavity and is connected with the filter cavity through the filter screen.
3. The variable frequency drive of claim 1, wherein the negative plate is secured to a bottom of the intake cavity; the bottom of negative plate is provided with the mounting, the negative plate is installed through this mounting in the air intake intracavity.
4. The variable frequency drive of claim 1, wherein the filter cloth is provided with evenly distributed blades; the scraping blade is positioned on one side of the filter cloth facing the positive plate.
5. The variable frequency drive of claim 1 wherein the positive and negative plates are parallel to each other, the circulating wiping device being located between the positive and negative plates;
the two rollers are respectively positioned at two sides of the positive plate.
6. The variable frequency drive of claim 1, wherein an exhaust fan is disposed at a top of the box body, and the exhaust fan are respectively disposed at two sides of the box body.
7. The variable frequency drive of claim 6, wherein the exhaust fan and the intake fan are both located on a same side of the case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111645115.2A CN114273339B (en) | 2021-12-30 | 2021-12-30 | Variable frequency drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111645115.2A CN114273339B (en) | 2021-12-30 | 2021-12-30 | Variable frequency drive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114273339A CN114273339A (en) | 2022-04-05 |
| CN114273339B true CN114273339B (en) | 2022-11-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111645115.2A Active CN114273339B (en) | 2021-12-30 | 2021-12-30 | Variable frequency drive |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4161142B2 (en) * | 1998-08-31 | 2008-10-08 | 岩崎電気株式会社 | Surface treatment equipment |
| CN108594954A (en) * | 2018-05-03 | 2018-09-28 | 云和漫行者玩具有限公司 | A kind of computer host box convenient for deashing |
| CN212856776U (en) * | 2020-08-04 | 2021-04-02 | 横店集团东磁股份有限公司 | Roller wiping device for roller |
| CN214338316U (en) * | 2021-03-04 | 2021-10-01 | 无锡源满机械设备有限公司 | Multistage dust removal electrical apparatus switch board |
| CN113427972A (en) * | 2021-08-06 | 2021-09-24 | 林凯 | Automobile air conditioner ventilation device and use method thereof |
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