Power supply filter

Abstract

The utility model belongs to the technical field of power supply filters, and particularly relates to a power supply filter, which comprises a mounting shell, a filter main body and an SMA spring, the filter main body is fixedly mounted on the mounting shell, and the mounting shell is U-shaped; the two second rotating shafts are rotationally mounted on the two sides of the inner wall of the mounting shell correspondingly; the two rotating assemblies are arranged in the mounting shell and used for driving the two second rotating shafts to rotate at the same time, through the arrangement of the structure, heat dissipation can be conducted on the filter body, heat accumulation of internal elements such as an inductance magnetic core, a power capacitor and a filter resistor due to high-frequency current and impedance loss is reduced, and the heat dissipation efficiency is improved. Meanwhile, the air outlet quantity of the fan blades can be adjusted, the rotating speed of the double-shaft motor is automatically reduced when the filter main body is at a low temperature or in a low load, invalid power consumption is reduced, noise is reduced, more energy is saved, the environment is better protected, and the use of workers is facilitated.

Description

Technical Field

[0001] This utility model belongs to the field of power filter technology, and in particular relates to a power filter. Background Technology

[0002] A power filter is a passive electronic device used to suppress electromagnetic interference (EMI) in power lines. Its core function is to separate conducted noise (such as high-frequency harmonics, spike pulses, radio frequency interference, etc.) generated in the power grid or equipment from clean power through impedance matching principle and frequency selective filtering, so as to ensure that sensitive electronic equipment (such as precision instruments, medical equipment, and communication systems) receive a stable and reliable power supply. Its structure typically consists of an inductor (energy storage resistor at high frequencies), a capacitor (bypass conductor at high frequencies), and a special dielectric (such as a ferrite core) forming a common-mode / differential-mode filter circuit. The common-mode filter targets symmetrical interference between the ground wire and the live / neutral wire, while the differential-mode filter suppresses asymmetrical noise between the live wire and the neutral wire. Working together, they can cover the 10kHz~300MHz frequency band, reducing the voltage ripple at the power supply output to the millivolt level. At the same time, they pass EMC certification tests (such as FCC and CISPR standards) to prevent the equipment from affecting other systems or malfunctioning due to interference caused by excessive conducted emissions. Its design requires a trade-off between cutoff frequency, insertion loss, leakage current, and size cost. For example, a dual-stage π-type filter structure is used in medical equipment to achieve 60dB attenuation at 150kHz while meeting the 50μA leakage safety threshold.

[0003] For example, Chinese patent CN212850264U discloses a high-efficiency heat dissipation power filter, including a protective housing, a filter circuit disposed within the protective housing, a filter connector electrically connected to one end of the filter circuit, a power connector electrically connected to the other end of the filter circuit, a connecting plate disposed at one end of the protective housing, connecting holes disposed on both sides of the connecting plate, and a heat dissipation component disposed at the upper middle position of the protective housing. This utility model's high-efficiency heat dissipation power filter uses the connecting plate to fix the protective housing, thus facilitating its fixation and enabling real-time heat dissipation of the electronic components inside the protective housing through the heat dissipation component, thereby effectively improving the working quality of the power filter.

[0004] The aforementioned patent has the following problems: In actual use, it does not have the function of adjusting the air volume of the fan, which means that the air volume of the fan cannot be automatically reduced when the filter is at low temperature or low load, resulting in ineffective power consumption and continuous noise, which is not conducive to the use of the staff. In view of this, we propose a power filter. Utility Model Content

[0005] The purpose of this invention is to provide a power filter to solve the problems mentioned in the background art.

[0006] In view of this, the present invention provides a power filter, including a mounting shell, a filter body and an SMA spring. The filter body is fixedly mounted on the mounting shell, which is U-shaped. A dual-axis motor is fixedly mounted on the bottom of the inner wall of the mounting shell. The two output ends of the dual-axis motor are fixedly connected to a first rotating shaft. The other ends of the two first rotating shafts are rotatably connected to both sides of the inner wall of the mounting shell. The SMA spring is disposed on the top of the filter body. A fixing plate is fixedly connected to the top of the mounting shell.

[0007] Two second rotating shafts are respectively rotatably mounted on both sides of the inner wall of the mounting housing, and three circumferentially distributed fan blades are fixedly mounted on the outside of each of the two second rotating shafts;

[0008] Two sets of rotating components are disposed inside the mounting housing and are used to drive two second rotating shafts to rotate simultaneously.

[0009] In this technical solution, by starting the dual-axis motor, the output end will drive the two first rotating shafts to rotate. Through the set synchronous pulley and synchronous belt, the two second rotating shafts will rotate simultaneously. Then, the fan blades will move around the second rotating shafts in a circle, which can dissipate heat from the filter body. Through the above structure, the filter body can be cooled, reducing the heat accumulation of internal components such as inductor cores, power capacitors, and filter resistors caused by high-frequency current and impedance loss, slowing down the aging rate of insulation materials, and thus facilitating use by staff.

[0010] When the filter body is at a high temperature, the SMA spring will stretch, pushing the slider to slide outside the slide rod. This will then move the connecting plate and connecting rod. The connecting rod will then press the pressure sensor, which will detect the pressure. The detected value will be transmitted to the control center, which will control the speed of the dual-axis motor to adjust the airflow of the fan blades. When the filter body is at a low temperature or low load, the speed of the dual-axis motor will be automatically reduced to reduce ineffective power consumption and noise, making it more energy-efficient and environmentally friendly, and thus more convenient for staff to use.

[0011] In the above technical solution, the rotating assembly further includes two synchronous pulleys, which are respectively fixedly connected to the outside of the first rotating shaft and the second rotating shaft, and the two synchronous pulleys are externally meshed with the same synchronous belt.

[0012] In this technical solution, by using a synchronous pulley and a synchronous belt set outside the first and second rotating shafts, the rotation of the first rotating shaft can drive the two second rotating shafts to rotate simultaneously.

[0013] In the above technical solution, further, multiple air inlets and multiple air outlets are provided on both sides of the mounting shell.

[0014] In this technical solution, the air inside the mounting housing can be circulated through the air inlet and air outlet.

[0015] In the above technical solution, a slide rod is fixedly connected to the top of the filter body, a slider is slidably mounted on the outside of the slide rod, and the top of the SMA spring is fixedly connected to the bottom of the slider.

[0016] In this technical solution, when the temperature of the filter body is high, the SMA spring will be stretched, pushing the slider to slide outside the slide rod.

[0017] In the above technical solution, a connecting plate is fixedly connected to one side of the slider, and a connecting rod is fixedly connected to the top of the connecting plate.

[0018] In this technical solution, the movement of the slider can drive the connecting plate and the connecting rod to move.

[0019] In the above technical solution, the bottom of the fixing plate is provided with an installation groove, and a pressure sensor is fixedly installed inside the installation groove. The connecting rod is adapted to the pressure sensor.

[0020] In this technical solution, the connecting rod can compress the pressure sensor, and the pressure sensor will detect the pressure.

[0021] In the above technical solution, a control center is further fixedly installed on the top of the fixing plate, and the control center is electrically connected to the dual-axis motor and the pressure sensor.

[0022] In this technical solution, the pressure value will be transmitted to the control center, which will control the speed of the dual-axis motor to achieve the function of adjusting the air volume of the fan blades.

[0023] The beneficial effects of this utility model are:

[0024] 1. By starting the dual-axis motor, the output end will drive the two first rotating shafts to rotate. Through the set synchronous pulley and synchronous belt, the two second rotating shafts will rotate simultaneously. Then, the fan blades will move around the second rotating shafts in a circle. At this time, the filter body can be cooled. Through the above structure, the filter body can be cooled, reducing the heat accumulation of internal components (such as inductor cores, power capacitors, and filter resistors) caused by high-frequency current and impedance loss, slowing down the aging rate of insulation materials, and thus facilitating the use of the staff.

[0025] 2. When the filter body is at a high temperature, the SMA spring will stretch, pushing the slider to slide outside the slide rod. This will then move the connecting plate and connecting rod. The connecting rod will then press the pressure sensor, which will detect the pressure. The detected value will be transmitted to the control center, which will control the speed of the dual-axis motor to adjust the airflow of the fan blades. When the filter body is at a low temperature or low load, the speed of the dual-axis motor will be automatically reduced to reduce ineffective power consumption and noise, making it more energy-efficient and environmentally friendly, and thus more convenient for staff to use. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0027] Figure 2 This is a cross-sectional view of the overall structure of this utility model;

[0028] Figure 3 This is a partial cross-sectional view of the overall structure of this utility model;

[0029] Figure 4 This is a schematic diagram of the rotating component structure in this utility model;

[0030] Figure 5 This utility model Figure 2 Enlarged structural diagram at point A

[0031] Figure 6 This utility model Figure 3 Enlarged structural diagram at point B.

[0032] The markings in the diagram are as follows:

[0033] 1. Mounting housing; 2. Filter body; 3. Air inlet; 4. Air outlet; 5. Dual-axis motor; 6. First rotating shaft; 7. Second rotating shaft; 8. Synchronous pulley; 9. Synchronous belt; 10. Fan blade; 11. Fixing plate; 12. Control center; 13. Slide rod; 14. Slider; 15. SMA spring; 16. Connecting plate; 17. Mounting slot; 18. Pressure sensor; 19. Connecting rod. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0035] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0036] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0037] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0038] It should be noted that, in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0039] Example 1: Please refer to Figures 1-6 As shown, this embodiment provides a power filter, including a mounting shell 1, a filter body 2, and an SMA spring 15. The filter body 2 is fixedly mounted on the mounting shell 1, which is U-shaped. A dual-axis motor 5 is fixedly mounted on the bottom of the inner wall of the mounting shell 1. The two output ends of the dual-axis motor 5 are fixedly connected to a first rotating shaft 6. The other ends of the two first rotating shafts 6 are respectively rotatably connected to the two sides of the inner wall of the mounting shell 1. The SMA spring 15 is set on the top of the filter body 2, and a fixing plate 11 is fixedly connected to the top of the mounting shell 1.

[0040] Two second rotating shafts 7 are respectively rotatably installed on both sides of the inner wall of the mounting housing 1, and three circumferentially distributed fan blades 10 are fixedly installed on the outside of each of the two second rotating shafts 7.

[0041] Two sets of rotating components are installed inside the mounting housing 1 and are used to drive the two second rotating shafts 7 to rotate simultaneously.

[0042] The dual-axis motor 5 is activated, which drives the two first shafts 6 to rotate. Through the synchronous pulley 8 and synchronous belt 9, the two second shafts 7 rotate simultaneously. Subsequently, the fan blades 10 move around the second shafts 7 in a circular motion, which dissipates heat from the filter body 2. The above structure can dissipate heat from the filter body 2, reduce the heat accumulation of internal components such as inductor cores, power capacitors, and filter resistors caused by high-frequency current and impedance loss, slow down the aging rate of insulation materials, and make it easier for staff to use.

[0043] When the temperature of the filter body 2 is high, the SMA spring 15 will stretch, pushing the slider 14 to slide outside the slide rod 13, and then driving the connecting plate 16 and the connecting rod 19 to move. At this time, the connecting rod 19 will squeeze the pressure sensor 18, and the pressure sensor 18 will detect the pressure. The detected value will be transmitted to the control center 12, and the control center 12 will control the speed of the dual-axis motor 5, thereby achieving the function of adjusting the air volume of the fan blade 10. When the filter body 2 is at low temperature or low load, the speed of the dual-axis motor 5 will be automatically reduced, reducing ineffective power consumption and noise, making it more energy-efficient and environmentally friendly, and thus more convenient for staff to use.

[0044] Example 2: This example provides a power filter, which, in addition to the technical solutions of the above examples, also has the following technical features: the rotating component includes two synchronous pulleys 8, which are respectively fixedly connected to the outside of the first rotating shaft 6 and the second rotating shaft 7, and the two synchronous pulleys 8 are externally meshed with the same synchronous belt 9.

[0045] The synchronous pulley 8 and synchronous belt 9, which are set outside the first rotating shaft 6 and the second rotating shaft 7, can drive the two second rotating shafts 7 to rotate simultaneously by rotating the first rotating shaft 6.

[0046] Example 3: This example provides a power filter, which, in addition to the technical solutions of the above examples, also has the following technical features: multiple air inlets 3 are provided on both sides of the mounting shell 1 at equal distances, and multiple air outlets 4 are provided on both sides of the mounting shell 1 at equal distances.

[0047] The air inlet 3 and air outlet 4 allow air to circulate inside the mounting housing 1.

[0048] Example 4: This example provides a power filter, which, in addition to the technical solutions of the above examples, also has the following technical features: a slide rod 13 is fixedly connected to the top of the filter body 2, a slider 14 is slidably mounted on the outside of the slide rod 13, and the top of the SMA spring 15 is fixedly connected to the bottom of the slider 14.

[0049] When the temperature of the filter body 2 is high, the SMA spring 15 will be stretched, pushing the slider 14 to slide outside the slide bar 13.

[0050] Example 5: This example provides a power filter, which, in addition to the technical solutions of the above examples, also has the following technical features: a connecting plate 16 is fixedly connected to one side of the slider 14, and a connecting rod 19 is fixedly connected to the top of the connecting plate 16.

[0051] The movement of slider 14 can drive the movement of connecting plate 16 and connecting rod 19.

[0052] Example 6: This example provides a power filter, which, in addition to the technical solutions of the above examples, also has the following technical features: a mounting groove 17 is provided at the bottom of the fixing plate 11, and a pressure sensor 18 is fixedly installed inside the mounting groove 17, and the connecting rod 19 is adapted to the pressure sensor 18.

[0053] The connecting rod 19 can compress the pressure sensor 18, which will detect the pressure.

[0054] Example 7: This example provides a power filter, which, in addition to the technical solutions of the above examples, also has the following technical features: a control center 12 is fixedly installed on the top of the fixing plate 11, and the control center 12 is electrically connected to the dual-axis motor 5 and the pressure sensor 18.

[0055] The pressure value will be transmitted to the control center 12, which will control the speed of the dual-axis motor 5 to adjust the airflow of the fan blade 10.

[0056] Working principle: By starting the dual-axis motor 5, the two output ends of the dual-axis motor 5 will drive the two first rotating shafts 6 to rotate simultaneously. Through the synchronous pulleys 8 and synchronous belts 9 set outside the first rotating shafts 6 and the second rotating shafts 7, the rotation of the first rotating shafts 6 can drive the two second rotating shafts 7 to rotate simultaneously. Subsequently, the fan blades 10 will move around the second rotating shafts 7 in a circle, which can dissipate heat from the filter body 2. The air inlet 3 and air outlet 4 allow air to circulate inside the mounting shell 1. Through the above structure, the filter body 2 can be cooled, reducing the heat accumulation of internal components (such as inductor cores, power capacitors, and filter resistors) caused by high-frequency current and impedance loss, slowing down the aging rate of insulation materials, and thus facilitating use by staff.

[0057] When the temperature of the filter body 2 is high, the SMA spring 15 will stretch, pushing the slider 14 to slide outside the slide rod 13, and then driving the connecting plate 16 and the connecting rod 19 to move. At this time, the connecting rod 19 will squeeze the pressure sensor 18, and the pressure sensor 18 will detect the pressure. The detected value will be transmitted to the control center 12, and the control center 12 will control the speed of the dual-axis motor 5, thereby achieving the function of adjusting the air volume of the fan blade 10. When the filter body 2 is at low temperature or low load, the speed of the dual-axis motor 5 will be automatically reduced, reducing ineffective power consumption and noise, making it more energy-efficient and environmentally friendly, and thus more convenient for staff to use.

[0058] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A power filter, comprising a mounting housing (1), a filter body (2), and an SMA spring (15), characterized in that, The filter body (2) is fixedly installed on the mounting shell (1). The mounting shell (1) is U-shaped. A dual-axis motor (5) is fixedly installed on the bottom of the inner wall of the mounting shell (1). The two output ends of the dual-axis motor (5) are fixedly connected to the first rotating shaft (6). The other ends of the two first rotating shafts (6) are respectively rotatably connected to the two sides of the inner wall of the mounting shell (1). The SMA spring (15) is set on the top of the filter body (2). A fixing plate (11) is fixedly connected to the top of the mounting shell (1). Two second rotating shafts (7) are respectively rotatably installed on both sides of the inner wall of the mounting shell (1), and three circumferentially distributed fan blades (10) are fixedly installed on the outside of each of the two second rotating shafts (7). Two sets of rotating components are disposed inside the mounting housing (1) and are used to drive two second rotating shafts (7) to rotate simultaneously.

2. A power filter according to claim 1, characterized in that, The rotating assembly includes two synchronous pulleys (8), which are fixedly connected to the outside of the first rotating shaft (6) and the second rotating shaft (7), respectively. The two synchronous pulleys (8) are meshed with the same synchronous belt (9).

3. A power filter according to claim 1, characterized in that, The mounting shell (1) has multiple air inlets (3) that are evenly distributed on both sides, and multiple air outlets (4) that are evenly distributed on both sides.

4. A power filter according to claim 1, characterized in that, A slide bar (13) is fixedly connected to the top of the filter body (2), and a slider (14) is slidably installed on the outside of the slide bar (13). The top of the SMA spring (15) is fixedly connected to the bottom of the slider (14).

5. A power filter according to claim 4, characterized in that, A connecting plate (16) is fixedly connected to one side of the slider (14), and a connecting rod (19) is fixedly connected to the top of the connecting plate (16).

6. A power filter according to claim 5, characterized in that, The bottom of the fixing plate (11) is provided with a mounting groove (17), and a pressure sensor (18) is fixedly installed inside the mounting groove (17). The connecting rod (19) is adapted to the pressure sensor (18).

7. A power filter according to claim 6, characterized in that, A control center (12) is fixedly installed on the top of the fixed plate (11), and the control center (12) is electrically connected to the dual-axis motor (5) and the pressure sensor (18).

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