SVG energy-saving air cooling system

Abstract

This utility model belongs to the field of heat dissipation technology for power electronic equipment, and discloses an SVG energy-saving air-cooling system. An IGBT module, a heat sink, and a fan are installed inside the cabinet. A first air vent is opened on the outer wall of the cabinet, and a guide shroud is installed on the outer wall, covering the first air vent. The guide shroud guides the airflow smoothly, reducing turbulence noise. Sound-absorbing cotton is laid on the inner wall of the guide shroud to further absorb airflow noise. The fan is used to deliver air from the first air vent into the cabinet, or from the cabinet into the first air vent. The temperature control device includes a temperature sensor, a frequency converter, and a controller installed inside the cabinet. The temperature sensor detects the surface temperature of the heat sink in real time. The controller receives and analyzes the detection value of the temperature sensor and sends a control signal to the frequency converter. The frequency converter controls the output power of the fan to adjust the fan speed, realizing temperature-based fan speed adjustment and solving the high energy consumption caused by the fan operating at full power all day.

Description

Technical Field

[0001] This utility model relates to the field of heat dissipation technology for power electronic equipment, and in particular to an SVG energy-saving air-cooling system. Background Technology

[0002] A Static Var Generator (SVG) is a power electronic device based on Voltage Source Converter (VSC) technology. By adjusting the amplitude and phase of the AC output voltage on the bridge circuit, or by directly controlling the amplitude and phase of the AC current, the SVG rapidly absorbs or generates the required reactive power, achieving rapid dynamic reactive power regulation. The main functions of the SVG are to provide reactive power compensation, improve the system's power factor, improve power quality, reduce line losses, maintain voltage stability, and suppress system oscillations.

[0003] Most existing SVG systems use air cooling for internal heat dissipation. During operation, the fan runs at full power, which not only wastes energy but also generates high-frequency noise pollution, with noise levels far exceeding the national noise limits. Utility Model Content

[0004] The purpose of this invention is to provide an SVG energy-saving air-cooling system that reduces energy consumption and noise.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] An SVG energy-saving air-cooled system includes:

[0007] The cabinet contains an IGBT module, a heat sink, and a fan. A first air vent is opened on the outer wall of the cabinet. A guide shroud is installed on the outer wall of the cabinet, covering the first air vent. Sound-absorbing cotton is laid on the inner wall of the guide shroud. The heat sink is close to and connected to the IGBT module. The fan is configured to either supply air from the first air vent into the cabinet or supply air from the cabinet into the first air vent.

[0008] A temperature control device includes a temperature sensor, a frequency converter, and a controller installed inside the cabinet. The temperature sensor is installed on the surface of the radiator to detect the surface temperature of the radiator in real time. The temperature sensor is communicatively connected to the controller. The input signal of the frequency converter is connected to the controller, and the output signal of the frequency converter is connected to the fan. The controller is configured to receive and analyze the detection value of the temperature sensor and send a control signal to the frequency converter. The frequency converter is configured to control the output power of the fan to adjust the fan speed.

[0009] Preferably, a filter screen is detachably installed on the outer wall of the cabinet, and the filter screen covers the first air vent to filter the airflow passing through the first air vent.

[0010] Preferably, the filter screen includes a filter screen, a frame, and a plurality of magnetic components. The filter screen is circumferentially fixed to the inner wall of the frame, and the plurality of magnetic components are spaced apart and embedded in the frame. The end faces of the magnetic components are flush with the outer wall of the frame, and the magnetic components are configured to adhere to the cabinet.

[0011] Preferably, the air guide includes a connected mounting base and a cover body. The mounting base is annular and installed on the outer wall of the cabinet. The filter screen is located inside the mounting base. The bottom of the cover body is circumferentially connected to the mounting base. The inner diameter of the cover body gradually increases along the central axis of the mounting base from the mounting base to the cover body. The sound-absorbing cotton is laid on the inner wall of the cover body.

[0012] Preferably, the mounting base and the cover are made of galvanized steel sheet, and the cover is welded to the mounting base.

[0013] Preferably, the controller includes a receiving module, an analysis module, and a signal generation module. The receiving module is connected to the temperature sensor and the analysis module, the analysis module is connected to the signal generation module, and the signal generation module is connected to the input terminal of the frequency converter. The receiving module is configured to receive the detection value of the temperature sensor and transmit it to the analysis module. The analysis module is configured to analyze the maximum value Tmax of the detection value of the temperature sensor, and control the signal generation module to generate a first control signal when Tmax is less than 45°C, control the signal generation module to generate a second control signal when Tmax is between 45°C and 65°C, and control the signal generation module to generate a third control signal when Tmax exceeds 65°C. The frequency converter receives the first control signal and controls the output power of the fan to 30% of its full power. The frequency converter receives the second control signal and controls the output power of the fan to be linearly adjusted between 30% and 100% of its full power. The frequency converter receives the third control signal and controls the output power of the fan to be at full power.

[0014] Preferably, two temperature sensors are provided, both of which are communicatively connected to the receiving module. One temperature sensor is installed on the surface of the heat sink to detect the surface temperature of the heat sink in real time, and the other temperature sensor is installed on the surface of the IGBT module to detect the surface temperature of the IGBT module in real time. The maximum value of the two temperature sensor readings is Tmax.

[0015] Preferably, the SVG energy-saving air-cooling system also includes an alarm, which is installed in the cabinet and the signal generation module is connected to the alarm. The alarm receives the third control signal and issues an alarm.

[0016] Preferably, the SVG energy-saving air-cooling system also includes an anemometer, which is connected to the controller and installed at the air outlet of the fan for detecting wind speed.

[0017] Preferably, a second air vent is provided on the outer wall of the cabinet, with the first air vent facing the second air vent. Two air guides are installed on the outer wall of the cabinet, covering the first air vent and the second air vent respectively. The fan is configured to deliver air from inside the cabinet to the second air vent, or to deliver air from the second air vent to inside the cabinet.

[0018] The beneficial effects of this utility model are:

[0019] This utility model provides an SVG energy-saving air-cooling system, including a cabinet and a temperature control device. An IGBT module, a heat sink, and a fan are installed inside the cabinet. A first air vent is opened on the outer wall of the cabinet, and a guide shroud is installed on the outer wall of the cabinet, covering the first air vent. The guide shroud guides the airflow smoothly, reducing turbulence noise. Sound-absorbing cotton is laid on the inner wall of the guide shroud to further absorb airflow noise. The heat sink is close to and connected to the IGBT module. The fan is configured to either supply air from the first air vent into the cabinet or from the cabinet into the first air vent. The temperature control device includes an installation... The system includes a temperature sensor, a frequency converter, and a controller inside the cabinet. The temperature sensor is installed on the surface of the radiator to detect the surface temperature of the radiator in real time. The temperature sensor is connected to the controller via communication. The input signal of the frequency converter is connected to the controller, and the output signal of the frequency converter is connected to the fan. The controller is configured to receive and analyze the detection value of the temperature sensor and send control signals to the frequency converter, thereby controlling the output power of the fan to adjust the fan speed. This achieves temperature-based fan speed adjustment, reduces energy consumption, and solves the high energy consumption problem caused by the fan operating at full power all day. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of an SVG energy-saving air-cooling system provided in an embodiment of this utility model;

[0021] Figure 2 This is a partial structural schematic diagram of an SVG energy-saving air-cooling system provided in an embodiment of the present invention;

[0022] Figure 3 This is a side view of an SVG energy-saving air-cooling system provided in an embodiment of this utility model.

[0023] In the picture:

[0024] 1. Cabinet; 11. First air vent; 12. Second air vent; 2. IGBT module; 3. Heat sink; 4. Fan; 5. Filter screen; 51. Filter screen; 52. Frame; 53. Magnetic component; 6. Air guide cover; 61. Mounting base; 62. Cover. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0026] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0029] Because existing SVG air-cooling systems operate with the fan running at full power all the time, this not only leads to energy waste but also generates high-frequency noise pollution during operation, with noise levels far exceeding the national noise limits. Therefore, this embodiment provides an energy-saving SVG air-cooling system that can reduce the noise generated by the fan and adjust the fan speed according to the temperature, thus solving the problem of high energy consumption caused by the fan operating at full power all day long.

[0030] Please see Figures 1 to 3 The SVG energy-saving air-cooling system provided in this embodiment includes a cabinet 1. An IGBT module 2, a heat sink 3 and a fan 4 are installed inside the cabinet 1. The heat sink 3 is close to and connected to the IGBT module 2. The heat generated by the IGBT module 2 during operation is transferred to the heat sink 3, and the airflow generated by the fan 4 carries away the heat on the surface of the heat sink 3, thereby achieving heat dissipation of the equipment.

[0031] Specifically, please refer to Figure 2 The outer wall of the cabinet 1 has a first air vent 11. The fan 4 operates inside the cabinet 1 to generate airflow. The airflow is sent from the first air vent 11 into the cabinet 1, or from the inside of the cabinet 1 into the first air vent 11.

[0032] For example, please continue reading Figure 2 Alternatively, a second air vent 12 can be opened on the outer wall of the cabinet 1, with the first air vent 11 facing the second air vent 12, so that under the action of the fan 4, air is supplied to the inside of the cabinet 1 from the first air vent 11 and air is discharged from the second air vent 12; or, air is supplied to the inside of the cabinet 1 from the second air vent 12 and air is discharged from the first air vent 11.

[0033] Please see Figures 1 to 3 Furthermore, to prevent dust in the airflow from entering the cabinet 1 through the first air vent 11 or the second air vent 12, this embodiment has a detachable filter screen 5 installed on the outer wall of the cabinet 1. The filter screen 5 filters the airflow entering the cabinet 1. For example, in this embodiment, under the action of the fan 4, air is supplied to the cabinet 1 through the first air vent 11 and discharged through the second air vent 12. Therefore, the filter screen 5 is installed to cover the first air vent 11. After the airflow is filtered by the filter screen 5, it enters the cabinet 1 through the first air vent 11.

[0034] For example, please refer to Figure 3This embodiment provides an installation structure for a filter screen 5. The filter screen 5 includes a filter screen 51, a frame 52, and a plurality of magnetic components 53. The edge of the filter screen 51 is circumferentially fixed to the inner wall of the frame 52, and the plurality of magnetic components 53 are spaced apart and embedded in the frame 52. Preferably, each side of the frame 52 is provided with a magnetic component 53, which can be attracted to the cabinet 1, thereby realizing the overall attraction of the filter screen 5 to the cabinet 1, which is convenient for maintenance personnel to quickly install and remove. More preferably, the end face of the magnetic component 53 is flush with the outer wall of the frame 52 to prevent gaps from forming between the cabinet 1 and the frame 52, causing dust accumulation.

[0035] Further, please refer to Figure 1 In this embodiment, a flow guide 6 is also installed on the outer wall of the cabinet 1 to guide the airflow smoothly and reduce turbulence noise. Furthermore, the flow guide 6 can cover the filter screen 5, that is, cover the first air outlet 11, to ensure that the airflow can be guided by the flow guide 6 to the filter screen 5 for filtration.

[0036] Furthermore, the inner wall of the air deflector 6 is lined with sound-absorbing cotton, which can effectively absorb the noise generated by the airflow.

[0037] Specifically, the air guide shroud 6 includes a connected mounting base 61 and a shroud 62. The mounting base 61 is annular and installed on the outer wall of the cabinet 1. The filter screen 5 is located inside the mounting base 61. Further, the bottom of the shroud 62 is circumferentially connected to the mounting base 61, and the inner diameter of the shroud 62 gradually increases along the central axis of the mounting base 61 from the mounting base 61 to the shroud 62 to guide the airflow smoothly. Preferably, sound-absorbing cotton is laid on the inner wall of the shroud 62.

[0038] Preferably, both the mounting base 61 and the cover 62 are made of galvanized steel sheet, have sufficient structural strength, and the cover 62 is welded to the mounting base 61.

[0039] Optionally, two air guide hoods 6 are installed on the outer wall of the cabinet 1. The two air guide hoods 6 cover the first air outlet 11 and the second air outlet 12 respectively. One air guide hood 6 is used to guide the airflow smoothly into the cabinet 1, and the other air guide hood 6 is used to guide the airflow smoothly out, further reducing turbulence noise and improving the noise reduction effect.

[0040] The SVG energy-saving air-cooling system provided in this embodiment is also equipped with a temperature control device (not shown in the figure). The temperature control device can adjust the speed of the fan 4 according to the temperature to solve the high energy consumption caused by the fan 4 operating at full power all day.

[0041] The temperature control device includes a temperature sensor, a frequency converter, and a controller installed inside the cabinet 1. The temperature sensor is installed on the surface of the radiator 3 to detect the surface temperature of the radiator 3 in real time. The temperature sensor is communicatively connected to the controller. The input signal of the frequency converter is connected to the controller, and the output signal of the frequency converter is connected to the fan 4. The controller is configured to receive and analyze the detection value of the temperature sensor and send control signals to the frequency converter. The frequency converter is configured to control the output power of the fan 4 to adjust the speed of the fan 4.

[0042] With the above settings, the temperature sensor's detection value directly represents the heat dissipation status inside cabinet 1. When the heat dissipation inside cabinet 1 is poor, the controller sends a signal to the frequency converter, which controls the output power of fan 4 to increase the speed of fan 4 and quickly improve the heat dissipation inside cabinet 1. When the heat dissipation inside cabinet 1 is good, the controller sends a signal to the frequency converter, which controls the output power of fan 4 to reduce the speed of fan 4 and save energy.

[0043] Specifically, the controller includes a receiving module, an analysis module, and a signal generation module. The receiving module is connected to the temperature sensor and the analysis module. The analysis module is connected to the signal generation module. The signal generation module is connected to the input terminal of the frequency converter. The receiving module is configured to receive the detection value of the temperature sensor and transmit it to the analysis module. The analysis module is configured to analyze the maximum value Tmax of the detection value of the temperature sensor.

[0044] Furthermore, the analysis module is also used to control the signal generation module to generate different control signals. Specifically, when Tmax is less than 45℃, the analysis module generates a first control signal, the frequency converter receives the first control signal and controls the output power of the fan 4 to 30% of full power. When Tmax is between 45℃ and 65℃, the analysis module generates a second control signal, the frequency converter receives the second control signal and controls the output power of the fan 4 to dynamically and linearly adjust between 30% and 100% of full power. When Tmax exceeds 65℃, the analysis module generates a third control signal, the frequency converter receives the third control signal and controls the output power of the fan 4 to full power.

[0045] Preferably, this embodiment provides two temperature sensors, both of which are communicatively connected to the receiving module. One temperature sensor is installed on the surface of the heat sink 3 to detect the surface temperature of the heat sink 3 in real time, and the other temperature sensor is installed on the surface of the IGBT module 2 to detect the surface temperature of the IGBT module 2 in real time. The maximum value of the two temperature sensor readings is set as Tmax to avoid misjudgment caused by a single temperature measurement point.

[0046] Optionally, the SVG energy-saving air-cooling system also includes an alarm. The alarm is installed in cabinet 1. The signal generation module is connected to the alarm. When Tmax exceeds 65℃, the control signal generation module generates a third control signal. After receiving the third control signal, the alarm can issue an alarm to alert the operation and maintenance personnel.

[0047] Optionally, the SVG energy-saving air-cooling system also includes an anemometer, which is installed at the air outlet of the fan 4 to detect the wind speed so as to monitor the working status of the fan 4 in real time. At the same time, the anemometer is connected to the controller to feed back the wind speed data to the controller as a basis for adjusting the speed of the fan 4.

[0048] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An SVG energy-saving air-cooling system, characterized in that, include: Cabinet (1), IGBT module (2), heat sink (3) and fan (4) are installed inside the cabinet (1), a first air vent (11) is opened on the outer wall of the cabinet (1), a guide shroud (6) is installed on the outer wall of the cabinet (1), the guide shroud (6) covers the first air vent (11), the inner wall of the guide shroud (6) is lined with sound-absorbing cotton, the heat sink (3) is close to and connected to the IGBT module (2), and the fan (4) is configured to send air from the first air vent (11) into the cabinet (1) or send air from the inside of the cabinet (1) into the first air vent (11); The temperature control device includes a temperature sensor, a frequency converter, and a controller installed inside the cabinet (1). The temperature sensor is installed on the surface of the radiator (3) to detect the surface temperature of the radiator (3) in real time. The temperature sensor is communicatively connected to the controller. The input signal of the frequency converter is connected to the controller. The output signal of the frequency converter is connected to the fan (4). The controller is configured to receive and analyze the detection value of the temperature sensor and send a control signal to the frequency converter. The frequency converter is configured to control the output power of the fan (4) to adjust the speed of the fan (4).

2. The SVG energy-saving air-cooling system according to claim 1, characterized in that, A filter screen (5) can be detachably installed on the outer wall of the cabinet (1). The filter screen (5) covers the first air vent (11) and is used to filter the airflow passing through the first air vent (11).

3. The SVG energy-saving air-cooling system according to claim 2, characterized in that, The filter screen (5) includes a filter screen (51), a frame (52) and a plurality of magnetic components (53). The filter screen (51) is circumferentially fixed to the inner wall of the frame (52). The plurality of magnetic components (53) are spaced apart and embedded in the frame (52), and the end face of the magnetic components (53) is flush with the outer wall of the frame (52). The magnetic components (53) are configured to be attracted to the cabinet (1).

4. The SVG energy-saving air-cooling system according to claim 2, characterized in that, The air guide cover (6) includes a connected mounting base (61) and a cover body (62). The mounting base (61) is annular and installed on the outer wall of the cabinet (1). The filter screen (5) is located inside the mounting base (61). The bottom of the cover body (62) is circumferentially connected to the mounting base (61). The inner diameter of the cover body (62) gradually increases along the central axis of the mounting base (61) from the mounting base (61) to the cover body (62). The sound-absorbing cotton is laid on the inner wall of the cover body (62).

5. The SVG energy-saving air-cooling system according to claim 4, characterized in that, The mounting base (61) and the cover (62) are made of galvanized steel sheet, and the cover (62) is welded to the mounting base (61).

6. An SVG energy-saving air-cooling system according to any one of claims 1-5, characterized in that, The controller includes a receiving module, an analysis module, and a signal generation module. The receiving module is connected to the temperature sensor and the analysis module. The analysis module is connected to the signal generation module. The signal generation module is connected to the input terminal of the frequency converter. The receiving module is configured to receive the detection value of the temperature sensor and transmit it to the analysis module. The analysis module is configured to analyze the maximum value Tmax of the detection value of the temperature sensor, and control the signal generation module to generate a first control signal when Tmax is less than 45℃, control the signal generation module to generate a second control signal when Tmax is between 45℃ and 65℃, and control the signal generation module to generate a third control signal when Tmax exceeds 65℃. The frequency converter receives the first control signal and controls the output power of the fan (4) to be 30% of the full power. The frequency converter receives the second control signal and controls the output power of the fan (4) to be linearly adjusted between 30% and 100% of the full power. The frequency converter receives the third control signal and controls the output power of the fan (4) to be the full power.

7. The SVG energy-saving air-cooling system according to claim 6, characterized in that, Two temperature sensors are provided, and both temperature sensors are communicatively connected to the receiving module. One temperature sensor is installed on the surface of the heat sink (3) to detect the surface temperature of the heat sink (3) in real time, and the other temperature sensor is installed on the surface of the IGBT module (2) to detect the surface temperature of the IGBT module (2) in real time. The maximum value of the detection values ​​of the two temperature sensors is Tmax.

8. The SVG energy-saving air-cooling system according to claim 6, characterized in that, The SVG energy-saving air-cooling system also includes an alarm, which is installed in the cabinet (1), and the signal generation module is connected to the alarm. The alarm receives the third control signal and issues an alarm.

9. An SVG energy-saving air-cooling system according to any one of claims 1-5, characterized in that, The SVG energy-saving air-cooling system also includes an anemometer, which is connected to the controller and installed at the air outlet of the fan (4) to detect the wind speed.

10. An SVG energy-saving air-cooling system according to any one of claims 1-5, characterized in that, The outer wall of the cabinet (1) has a second air vent (12), the first air vent (11) is opposite to the second air vent (12), and two air guides (6) are installed on the outer wall of the cabinet (1). The two air guides (6) cover the first air vent (11) and the second air vent (12) respectively. The fan (4) is configured to send air from the inside of the cabinet (1) to the second air vent (12), or to send air from the second air vent (12) to the inside of the cabinet (1).

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