Protection device of frequency converter

Abstract

The utility model discloses a protection device of a frequency converter, which comprises a body, the left side of the body is inserted with a fixed cylinder fixedly connected with the body, the inner wall of the fixed cylinder is rotatably connected with a rotating cylinder, the left side of the fixed cylinder is fixedly connected with a motor, and an output shaft of the motor penetrates through the fixed cylinder and is fixedly connected with the rotating cylinder. Annularly distributed through holes are formed in the outer side of the rotating cylinder, and the inner walls of the through holes are slidably connected with a filter plate. According to the air supply device, air is continuously fed into the body, the heat dissipation effect on the body is achieved, then the overheating protection effect on the body is achieved, in the air supply process, the filter plate used for filtering air can be self-cleaned, a user does not need to replace the filter plate regularly, and the air filtering effect of the filter plate is kept; and the air flow entering the body is stabilized, so that the heat dissipation protection stability and reliability of the frequency converter are improved, and the practicability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of frequency converters, in particular to a protection device for frequency converters. Background Art

[0002] The frequency converter is a power control device that uses frequency conversion technology and microelectronics technology to control AC motors by changing the frequency of the motor's working power supply. The frequency converter is mainly composed of rectification (AC to DC), filtering, inversion (DC to AC), braking unit, drive unit, detection unit, and microprocessor unit. The frequency converter adjusts the output power voltage and frequency by the internal IGBT switching, and provides the required power supply voltage according to the actual needs of the motor, thereby achieving the purpose of energy saving and speed regulation.

[0003] The inverter will generate heat when working for a long time. In order to reduce the damage caused by heat to the inverter, a heat dissipation mechanism is used to protect the inverter and avoid overheating of the inverter. Common heat dissipation mechanisms usually send air into the inverter and use the air to take away the heat in the inverter to achieve the purpose of heat dissipation protection. A filter plate is used to filter the dust in the air when the air enters the inverter. After long-term use, a large amount of dust will be attached to the filter plate, which will affect the flow of air entering the inverter, thereby affecting the heat dissipation protection effect of the inverter. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of the utility model is to provide a protection device for a frequency converter to solve the background technical problems.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The motor drive shaft is connected to the motor via a through hole, and the motor drives the motor to move upwards to move the motor, thereby preventing the motor from moving upwards and downwards.

[0007] As a further description of the above technical solution:

[0008] One end of the slide rod is rotatably connected to a roller, and the outer side of the roller is in contact with the fixing cylinder.

[0009] As a further description of the above technical solution:

[0010] A storage box is fixedly connected to the bottom of the fixed cylinder, and a waste box slidably connected to the storage box is inserted on the left side of the storage box.

[0011] As a further description of the above technical solution:

[0012] A flow sensor is installed on the inner wall of the fixed cylinder, and a controller for controlling the opening and closing of the motor is installed on the inner wall of the main body.

[0013] As a further description of the above technical solution:

[0014] The top of the body is fixedly connected with a gas tank, the bottom of the gas tank is connected with a conduit, the bottom end of the conduit is connected with the body, a solenoid valve is installed on the conduit, and a flame sensor is installed on the inner wall of the body.

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] This solution achieves the heat dissipation effect of the main body by continuously supplying air into the main body, thereby providing overheat protection for the main body. In the process of air supply, the filter plate used to filter the air can be self-cleaned, thereby eliminating the need for users to replace it regularly, maintaining the air filtering effect of the filter plate, stabilizing the air flow into the main body, thereby improving the stability and reliability of the heat dissipation protection of the inverter and improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a cross-sectional view of the utility model;

[0019] Figure 3 For this utility model Figure 2 Enlarged view of part A in the middle;

[0020] Figure 4 It is a partial cross-sectional view of the fixing cylinder in the utility model.

[0021] Description of the numbers in the figure:

[0022] 1. Main body; 2. Fixed cylinder; 3. Rotating cylinder; 4. Motor; 5. Through hole; 6. Filter plate; 7. Spring; 8. Sliding rod; 9. Groove; 10. Trapezoidal block; 11. Fan; 12. Through slot; 13. Baffle; 14. Roller; 15. Storage box; 16. Waste box; 17. Flow sensor; 18. Controller; 19. Gas tank; 20. Conduit; 21. Solenoid valve; 22. Flame sensor. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0024] See also Figures 1 to 4 In the utility model, a protective device for a frequency converter includes a body 1, a fixed cylinder 2 fixedly connected to the body 1 is inserted on the left side, a rotating cylinder 3 is rotatably connected to the inner wall of the fixed cylinder 2, a motor 4 is fixedly connected to the left side of the fixed cylinder 2, the output shaft of the motor 4 passes through the fixed cylinder 2 and is fixedly connected to the rotating cylinder 3, an annular through hole 5 is provided on the outer side of the rotating cylinder 3, a filter plate 6 is slidably connected to the inner wall of the through hole 5, two springs 7 are fixedly connected to the outer side of the filter plate 6, two slide bars 8 are fixedly connected to one side of the filter plate 6, and the other end of the slide bar 8 passes through and extends to the inside of the fixed cylinder 2, two grooves 9 are provided on the inner wall of the fixed cylinder 2, and trapezoidal blocks 10 are fixedly connected to the inner walls of the two grooves 9, two fans 11 are embedded on the right side of the rotating cylinder 3, two through grooves 12 are provided on the top and bottom of the fixed cylinder 2, a baffle 13 is fixedly connected to the inner wall of the fixed cylinder 2, and the bottom of the baffle 13 contacts with the rotating cylinder 3.

[0025] In the utility model, the main body 1 is the frequency converter used. When the main body 1 is working, the user turns on the fan 11 to dissipate heat for the main body 1 and achieve the effect of overheating protection. After the fan 11 is turned on, the outside air will be sucked into the through hole 5 from the top through groove 12, and then the air will pass through the filter plate 6 and enter the rotating cylinder 3, and then the air will smoothly enter the main body 1, the air will flow in the main body 1 and be discharged from the air outlet groove on the right. During the flow of air inside the main body 1, the heat of the main body 1 will be taken away, thereby achieving the effect of heat dissipation for the main body 1 and achieving the effect of overheating protection for the main body 1.

[0026] When the main body 1 is subjected to heat dissipation protection for a long time, a large amount of dust will adhere to the surface of the top filter plate 6. At this time, the motor 4 is turned on, and the motor 4 will drive the rotating drum 3 to rotate. After the rotating drum 3 rotates, the attached dust will be driven downward. After the rotating drum 3 rotates ninety degrees, the unused filter plate 6 will be aligned with the top through groove 12. At this time, the filter plate 6 will be used to filter the air, thereby realizing the replacement of the filter plate 6, maintaining the size of the air flow entering the interior of the main body 1, maintaining the heat dissipation effect in the main body 1 stable, and improving the reliability of the protection of the main body 1.

[0027] When the filter plate 6 with dust attached slides under the baffle 13, the baffle 13 will close the through hole 5. As the rotating cylinder 3 rotates, the slide bar 8 will slide into the groove 9, and then the slide bar 8 will continue to slide over the tops of multiple trapezoidal blocks 10. Whenever the slide bar 8 slides from the inclined surface of the trapezoidal block 10 to the highest point of the trapezoidal block 10, the slide bar 8 will drive the filter plate 6 to compress the spring 7 until the slide bar 8 slides over the trapezoidal block 10. At this time, the spring 7 will drive the filter plate 6 to drop rapidly and impact the rotating cylinder 3. During the impact, the dust on the filter plate 6 will be shaken off, and the shaken dust will be discharged from the through groove 12 at the bottom, thereby achieving the self-cleaning effect of the filter plate 6, thereby improving the practicality of the device.

[0028] See also Figure 3 and 4 , wherein: one end of the slide rod 8 is rotatably connected to a roller 14 , and the outer side of the roller 14 is in contact with the fixed cylinder 2 .

[0029] In the utility model, the roller 14 arranged on the slide bar 8 can effectively reduce the friction force, improve the running smoothness of the device, reduce the wear and tear and increase the service life of the device.

[0030] See also Figure 1 and 2 , wherein: a storage box 15 is fixedly connected to the bottom of the fixed cylinder 2, and a waste box 16 slidably connected to the storage box 15 is inserted on the left side of the storage box 15.

[0031] In the present invention, the waste box 16 can be used to collect dust shaken off the filter plate 6, thereby facilitating cleaning by the user and improving the practicality of the device.

[0032] See also Figure 3 , wherein: a flow sensor 17 is installed on the inner wall of the fixed cylinder 2, and a controller 18 for controlling the opening and closing of the motor 4 is installed on the inner wall of the main body 1.

[0033] In the utility model, the flow sensor 17 can detect the flow rate of air entering the main body 1. If the flow rate entering the main body 1 is greatly reduced, it means that the filter plate 6 needs to be cleaned and replaced, which makes it convenient for the user to clean and replace the filter plate 6 as soon as possible, maintain the heat dissipation effect of the main body 1, and improve the reliability of its protection.

[0034] See also Figure 1 and 2 , wherein: a gas tank 19 is fixedly connected to the top of the body 1, a conduit 20 is connected to the bottom of the gas tank 19, the bottom end of the conduit 20 is connected to the body 1, a solenoid valve 21 is installed on the conduit 20, and a flame sensor 22 is installed on the inner wall of the body 1.

[0035] In the utility model, the flame sensor 22 can detect whether there is an open flame in the body 1. If a flame appears, the solenoid valve 21 will be opened, and the carbon dioxide in the gas tank 19 will be sprayed out from the conduit 20, thereby achieving the effect of extinguishing the fire of the body 1 and protecting the electrical appliances outside the body 1.

[0036] The above are only preferred specific implementations of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A protection device for a frequency converter, comprising a main body (1), characterized in that: The left side of the body (1) is penetrated by a fixed cylinder (2) fixedly connected thereto, the inner wall of the fixed cylinder (2) is rotatably connected to a rotating cylinder (3), the left side of the fixed cylinder (2) is fixedly connected to a motor (4), the output shaft of the motor (4) passes through the fixed cylinder (2) and is fixedly connected to the rotating cylinder (3), the outer side of the rotating cylinder (3) is provided with annularly distributed through holes (5), the inner wall of the through hole (5) is slidably connected to a filter plate (6), the outer side of the filter plate (6) is fixedly connected to two springs (7), the filter plate (6) is Two sliding rods (8) are fixedly connected to one side, and the other end of the sliding rod (8) penetrates and extends into the interior of the fixed cylinder (2). The inner wall of the fixed cylinder (2) is provided with two grooves (9), and the inner walls of the two grooves (9) are fixedly connected with trapezoidal blocks (10). Two fans (11) are embedded on the right side of the rotating cylinder (3). The top and bottom of the fixed cylinder (2) are provided with two through grooves (12). The inner wall of the fixed cylinder (2) is fixedly connected with a baffle (13), and the bottom of the baffle (13) is in contact with the rotating cylinder (3).

2. The protection device for a frequency converter according to claim 1, characterized in that: One end of the sliding rod (8) is rotatably connected to a roller (14), and the outer side of the roller (14) is in contact with the fixed cylinder (2).

3. The protection device for a frequency converter according to claim 1, characterized in that: A storage box (15) is fixedly connected to the bottom of the fixed cylinder (2), and a waste box (16) slidably connected to the storage box (15) is inserted into the left side of the storage box (15).

4. The protection device for a frequency converter according to claim 1, characterized in that: A flow sensor (17) is installed on the inner wall of the fixed cylinder (2), and a controller (18) for controlling the opening and closing of the motor (4) is installed on the inner wall of the body (1).

5. The protection device for a frequency converter according to claim 1, characterized in that: The top of the body (1) is fixedly connected to a gas tank (19), the bottom of the gas tank (19) is connected to a conduit (20), the bottom end of the conduit (20) is connected to the body (1), a solenoid valve (21) is installed on the conduit (20), and a flame sensor (22) is installed on the inner wall of the body (1).

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