Energy-saving control device of high-voltage frequency converter

Abstract

The utility model discloses an energy-saving control device for a high-voltage frequency converter, which belongs to the technical field of high-voltage frequency converters and comprises a frequency converter case, a mounting plate is fixedly mounted in the middle of the bottom of the frequency converter case, and a radiating fin plate is fixedly mounted on one side of the mounting plate. The frequency converter further comprises a heat dissipation assembly for dissipating heat in the frequency converter case, the heat dissipation assembly comprises two sets of frequency conversion fans, the frequency conversion fans are installed on the top of one side of the frequency converter case, and three sets of temperature sensors are arranged below the frequency conversion fans. The temperature sensor is arranged to be matched with the controller for use, the structure is simple, convenience and practicability are achieved, the rotating speed of the frequency conversion fan can be adjusted according to the internal temperature of the frequency converter case, energy consumption is reduced, and the frequency conversion fan can be turned off when the high-voltage frequency converter operates at low power or the internal temperature of the frequency converter case is low for use in cooperation with the adjusting assembly. And the frequency converter case is opened for natural ventilation and heat dissipation, so that the energy consumption is further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage frequency converters, and specifically relates to an energy-saving control device for high-voltage frequency converters. Background Art

[0002] The main working principle of a high-voltage frequency converter is to first convert the input high-voltage alternating current with a fixed frequency and fixed voltage into direct current through a rectification link, and then convert the direct current into alternating current with adjustable frequency and voltage through an inversion link, so as to achieve precise control and adjustment of the rotational speed of a high-voltage motor. The high-voltage frequency converter can flexibly adjust the motor speed according to the actual load demand, so that the motor can reduce energy consumption while meeting the process requirements. For example, in application scenarios with large load changes such as fans and water pumps, when the load demand decreases, by reducing the motor speed, the power consumption can be significantly reduced. The high-voltage frequency converter can also precisely control the motor speed, meet the requirements of various complex production processes, and improve product quality and production efficiency. For example, in the paper-making industry, by precisely controlling the rotational speeds of the motors of each part of the paper-making machine, the indexes such as the thickness and flatness of the paper can be guaranteed to reach higher standards.

[0003] After retrieval, in the prior art, the Chinese patent publication number: CN214708500U, discloses an energy-saving high-voltage frequency converter cooling system. The utility model: includes a base, a protection box is connected to the top of the base, a plurality of frequency converter bodies are arranged at the rear part of the inner wall of the protection box, a ventilation pipe is connected to the top end of the inner wall of the protection box, through holes corresponding to the middle part of the ventilation pipe are respectively opened at the left end and the right end of the protection box, the left end and the right end of the ventilation pipe are respectively communicated with the corresponding through holes, a first liquid storage tank and a second liquid storage tank are respectively connected to the right end and the left end of the protection box, a first liquid inlet pipe is communicated with the rear end of the first liquid storage tank, an air outlet box is connected to the top end of the first liquid storage tank, a fan is installed at the right end of the inner wall of the air outlet box, a second liquid inlet pipe is communicated with the rear end of the second liquid storage tank, a gas guide box is connected to the top end of the second liquid storage tank, the middle parts of the air outlet box and the gas guide box are both connected to the middle part of the ventilation pipe, and a plurality of long strip holes are arranged at the top end of the gas guide box.

[0004] However, the device still has the following defects:

[0005] The device dissipates heat from the high-voltage frequency converter through water cooling and other methods, resulting in relatively high energy consumption, and the efficiency of the cooling system cannot be adjusted according to the operating state of the high-voltage frequency converter, further increasing the energy consumption. The device does not solve this problem. Summary of the Utility Model

[0006] The purpose of the present utility model is to provide an energy-saving control device for a high-voltage frequency converter. By setting a temperature sensor in cooperation with a controller, the rotation speed of the variable-frequency fan can be adjusted according to the temperature inside the frequency converter chassis, thereby reducing energy consumption. In cooperation with the adjustment component, when the high-voltage frequency converter operates at low power, the variable-frequency fan can be turned off, and the frequency converter chassis can be opened for natural ventilation and heat dissipation, further reducing energy consumption, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above purpose, the present utility model provides the following technical solutions:

[0008] An energy-saving control device for a high-voltage frequency converter includes a frequency converter chassis. An installation plate is fixedly installed in the middle of the bottom of the frequency converter chassis, and a heat dissipation fin plate is fixedly installed on one side of the installation plate;

[0009] It further includes a heat dissipation component for dissipating heat inside the frequency converter chassis. The heat dissipation component includes two variable-frequency fans. The variable-frequency fans are installed at the top of one side of the frequency converter chassis. Three temperature sensors are arranged below the variable-frequency fans. The variable-frequency fans and the temperature sensors are electrically connected to a controller;

[0010] It further includes a control component for controlling the opening and closing of the frequency converter chassis. The control component includes a top plate. One side of the top plate is rotatably matched with the frequency converter chassis, and the other side of the top plate is rotatably matched with the telescopic end of a first electric telescopic rod.

[0011] Preferably, the heat dissipation component further includes an air intake grille. The air intake grille is fixed to the bottom of the other side of the frequency converter chassis by screws. A dust filter net is fixedly installed inside the air intake grille. A protective cover is arranged outside the variable-frequency fan, and the protective cover is fixedly connected to the frequency converter chassis.

[0012] Preferably, the temperature sensors are equidistantly installed on the inner wall of one side of the frequency converter chassis, and the controller is fixedly installed on the upper part of the inner wall adjacent to the temperature sensors inside the frequency converter.

[0013] Preferably, the bottom of the first electric telescopic rod is rotatably installed on a mounting seat. The first electric telescopic rod is electrically connected to the controller, and the mounting seat is fixedly installed on the inner wall of the frequency converter chassis.

[0014] Preferably, a first filter screen is arranged at the opening of the top plate and the frequency converter chassis. The top of the first filter screen is fixedly installed on the top plate, and the bottom of the first filter screen is fixedly installed on the frequency converter chassis.

[0015] Preferably, two air intake windows are opened below both sides of the frequency converter chassis, and movable baffles are arranged outside the air intake windows.

[0016] Preferably, a second filter screen is fixedly installed in the air inlet window, and sliding grooves are fixedly installed on both sides of the air inlet window, and the sliding grooves are slidably matched with the movable baffle.

[0017] Preferably, the top of the movable baffle is fixedly connected to the telescopic end of the second electric telescopic rod. The second electric telescopic rod is fixedly installed on the outer wall of the frequency converter chassis, and the second electric telescopic rod is electrically connected to the controller.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0019] By arranging the temperature sensor to cooperate with the controller, the present utility model has a simple structure, is convenient and practical, can adjust the rotation speed of the variable frequency fan according to the temperature inside the frequency converter chassis, thereby reducing energy consumption. When used in cooperation with the adjustment assembly, the variable frequency fan can be turned off and the frequency converter chassis can be opened for natural ventilation and heat dissipation when the high-voltage frequency converter operates at low power or the temperature inside the frequency converter chassis is relatively low, further reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the present utility model;

[0021] Figure 2 is a schematic structural diagram of the frequency converter chassis in the opened state;

[0022] Figure 3 is a schematic sectional structural diagram of the frequency converter chassis;

[0023] Figure 4 is a schematic structural diagram of the inner wall of the frequency converter chassis.

[0024] In the figure: 1. Frequency converter chassis; 2. Mounting plate; 3. Heat dissipation fin; 4. Variable frequency fan; 5. Temperature sensor; 6. Controller; 7. Top plate; 8. First electric telescopic rod; 9. Air inlet grille; 10. Protective cover; 11. Mounting seat; 12. First filter screen; 13. Air inlet window; 14. Movable baffle; 15. Second filter screen; 16. Sliding groove; 17. Second electric telescopic rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0026] Please refer to Figures 1 to 4 , the present utility model provides a technical solution:

[0027] A high-voltage frequency converter energy-saving control device includes a frequency converter chassis 1. A mounting plate 2 is fixedly installed in the middle of the bottom of the frequency converter chassis 1. By setting the mounting plate 2, it is convenient to install electronic components such as the IGBT module, capacitor, relay, and capacitor board of the frequency converter body.

[0028] A heat dissipation fin plate 3 is fixedly installed on one side of the mounting plate 2. It also includes a heat dissipation component for dissipating heat inside the frequency converter chassis 1. The heat dissipation component includes two groups of variable-frequency fans 4, and the variable-frequency fans 4 are installed at the top of one side of the frequency converter chassis 1.

[0029] A protective cover 10 is arranged outside the variable-frequency fan 4, and the protective cover 10 is fixedly connected to the frequency converter chassis 1. The heat dissipation component also includes an air intake grille 9, and the air intake grille 9 is fixed to the bottom of the other side of the frequency converter chassis 1 by screws. A dust filter net is fixedly installed inside the air intake grille 9.

[0030] By setting the variable-frequency fan 4, the air inside the frequency converter chassis 1 can be quickly extracted to accelerate heat dissipation. Used in conjunction with the air intake grille 9, it is convenient for external air to enter the inside of the frequency converter chassis 1, further accelerating heat dissipation, and by setting the dust filter net, the entry of dust into the frequency converter chassis 1 can be reduced.

[0031] Three temperature sensors 5 are arranged below the variable-frequency fan 4. The temperature sensors 5 are equidistantly installed on the inner wall of one side of the frequency converter chassis 1. The controller 6 is fixedly installed on the upper part of the inner wall of the frequency converter adjacent to the temperature sensors 5. The variable-frequency fan 4 and the temperature sensors 5 are electrically connected to the controller 6. By setting multiple groups of temperature sensors 5, the temperature of each part inside the frequency converter chassis 1 can be monitored and sent to the controller 6. The controller 6 can control the rotation speed of the variable-frequency fan 4 or directly turn off the variable-frequency fan 4 according to the temperature state, so as to reduce energy consumption on the premise of ensuring the heat dissipation effect.

[0032] It also includes a control component for controlling the opening and closing of the frequency converter chassis 1. The control component includes a top plate 7. One side of the top plate 7 is rotatably matched with the frequency converter chassis 1, and the other side of the top plate 7 is rotatably matched with the telescopic end of the first electric telescopic rod 8.

[0033] The bottom of the first electric telescopic rod 8 is rotatably installed on the mounting seat 11. The first electric telescopic rod 8 is electrically connected to the controller 6. The mounting seat 11 is fixedly installed on the inner wall of the frequency converter chassis 1. A first filter screen 12 is arranged between the top plate 7 and the opening of the frequency converter chassis 1. The top of the first filter screen 12 is fixedly installed on the top plate 7, and the bottom of the first filter screen 12 is fixedly installed on the frequency converter chassis 1.

[0034] On both sides below the frequency converter chassis 1, two groups of air intake windows 13 are provided. An activity baffle 14 is arranged outside the air intake window 13. A second filter screen 15 is fixedly installed inside the air intake window 13. Slide grooves 16 are fixedly installed on both sides of the air intake window 13. The slide grooves 16 are in sliding fit with the activity baffle 14. The top of the activity baffle 14 is fixedly connected to the telescopic end of the second electric telescopic rod 17.

[0035] The second electric telescopic rod 17 is fixedly installed on the outer wall of the frequency converter chassis 1. The second electric telescopic rod 17 is electrically connected to the controller 6. By setting the first electric telescopic rod 8 and the second electric telescopic rod 17, when the frequency converter body operates at low power or the temperature inside the frequency converter chassis 1 is not very high, the top plate 7 and the activity baffle 14 can be pushed to open the top and both sides of the frequency converter chassis 1, facilitating the entry of external air into the frequency converter chassis 1 and also facilitating the discharge of hot air inside the frequency converter chassis 1 from the top for natural heat dissipation, further reducing energy consumption.

[0036] At the same time, when the frequency conversion fan 4 is working, the air intake window 13 can be closed, thereby improving the sealing performance inside the frequency converter chassis 1, ensuring that the air moves from bottom to top, accelerating the air flow, facilitating heat dissipation, and by setting the first filter screen 12 and the second filter screen 15 to be used in combination, the entry of dust into the frequency converter chassis 1 can be reduced.

[0037] During specific use, the device is moved to a specified position. The temperature sensor 5 monitors the temperature inside the frequency converter chassis 1 and transmits the temperature information to the controller 6;

[0038] When the temperature is higher than the preset value, the controller 6 turns on the frequency conversion fan 4. The frequency conversion fan 4 quickly extracts the air inside the frequency converter chassis 1 and takes away the heat. At the same time, a negative pressure is formed inside the frequency converter chassis 1. The negative pressure inhales the external air into the frequency converter chassis 1 through the air intake grille 9. The air moves from bottom to top and from front to back inside the frequency converter chassis 1, passes through the surfaces of each electronic component and the heat dissipation fins 3 while taking away the heat, and is finally discharged by the frequency conversion fan 4;

[0039] When the temperature sensor 5 monitors that the temperature becomes lower, the controller 6 controls the frequency conversion fan 4 to reduce the speed to reduce energy consumption. When the temperature sensor 5 monitors that the temperature becomes higher, the controller 6 controls the frequency conversion fan 4 to increase the speed to accelerate heat dissipation;

[0040] When the temperature is lower than the preset value, the controller 6 controls the frequency conversion fan 4 to close, controls the telescopic end of the first electric telescopic rod 8 to extend upward, rotates and opens the top plate 7, and controls the telescopic end of the second electric telescopic rod 17 to contract, driving the activity baffle 14 to slide upward, thereby opening both sides of the frequency converter chassis 1. The hot air inside the frequency converter chassis 1 moves upward and is discharged to the outside through the opening at the top. At the same time, the outside air enters the frequency converter chassis 1 from the air intake window 13 and the air intake grille 9, thereby realizing natural heat dissipation and reducing energy consumption.

[0041] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A high voltage inverter energy saving control device, characterized in that: include: A frequency converter chassis (1), wherein a mounting plate (2) is fixedly mounted in the middle of the bottom of the frequency converter chassis (1), and a heat dissipation fin plate (3) is fixedly mounted on one side of the mounting plate (2); It also includes a heat dissipation component for dissipating heat inside the frequency converter chassis (1); and A control component for controlling the opening and closing of a frequency converter chassis (1).

2. The high-voltage inverter energy-saving control device according to claim 1, characterized in that: The heat dissipation component comprises two groups of variable frequency fans (4), the variable frequency fans (4) are installed on the top of one side of the inverter chassis (1), three groups of temperature sensors (5) are arranged below the variable frequency fans (4), and the variable frequency fans (4) and the temperature sensors (5) are electrically connected to the controller (6).

3. The high-voltage inverter energy-saving control device according to claim 2, characterized in that: The control assembly comprises a top plate (7), one side of the top plate (7) being rotationally matched with the frequency converter chassis (1), and the other side of the top plate (7) being rotationally matched with the telescopic end of the first electric telescopic rod (8).

4. A high-voltage inverter energy-saving control device according to claim 3, characterized in that: The heat dissipation assembly further comprises an air intake grille (9), the air intake grille (9) being fixed to the bottom of the other side of the inverter chassis (1) by means of screws, a dust filter being fixedly mounted on the inner side of the air intake grille (9), a protective cover (10) being arranged on the outer side of the variable frequency fan (4), and the protective cover (10) being fixedly connected to the inverter chassis (1).

5. A high-voltage inverter energy-saving control device according to claim 4, characterized in that: The temperature sensors (5) are installed at equal distances on one inner wall of the inverter chassis (1), and the controller (6) is fixedly installed above the inner wall of the inverter adjacent to the temperature sensor (5).

6. A high-voltage inverter energy-saving control device according to claim 5, characterized in that: The bottom of the first electric telescopic rod (8) is rotatably mounted on a mounting seat (11); the first electric telescopic rod (8) is electrically connected to the controller (6); and the mounting seat (11) is fixedly mounted on the inner wall of the inverter chassis (1).

7. A high-voltage inverter energy-saving control device according to claim 6, characterized in that: A first filter screen (12) is provided at the opening between the top plate (7) and the inverter case (1); the top of the first filter screen (12) is fixedly mounted on the top plate (7), and the bottom of the first filter screen (12) is fixedly mounted on the inverter case (1).

8. The high-voltage inverter energy-saving control device according to claim 7, characterized in that: Two groups of air inlet windows (13) are provided below the two sides of the frequency converter chassis (1), and movable baffles (14) are provided outside the air inlet windows (13).

9. A high-voltage inverter energy-saving control device according to claim 8, characterized in that: A second filter (15) is fixedly installed in the air intake window (13), and slide grooves (16) are fixedly installed on both sides of the air intake window (13), and the slide grooves (16) are slidably matched with the movable baffle (14).

10. A high-voltage inverter energy-saving control device according to claim 9, characterized in that: The top of the movable baffle (14) is fixedly connected to the telescopic end of a second electric telescopic rod (17); the second electric telescopic rod (17) is fixedly mounted on the outer wall of the inverter chassis (1); and the second electric telescopic rod (17) is electrically connected to the controller (6).

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