Flyback transformer structure with variable inductance

Abstract

The invention provides a variable-inductance flyback transformer structure, which comprises a flyback transformer main body, a magnetic core is arranged on the outer package of the middle part of the flyback transformer main body, a main winding is fixedly mounted on the inner wall of the middle part of the magnetic core, a secondary winding sleeves the outer wall of a side column on one side of the magnetic core, and a high-low air gap is formed in the outer wall of a side column on the other side of the magnetic core; the stepped air gap or the slope air gap is arranged, and when the magnetic core is close to saturation, the inductance value is reduced; according to the flyback transformer, the step air gap or the slope air gap is utilized, the saturation effect in the magnetic core is gradually promoted from the narrow side of the air gap to the wide side, under the condition of low-voltage input, the magnetomotive force is large, the saturation is promoted to the wide position greatly, and the inductance value of the flyback transformer is reduced; and under the condition of high-voltage input, the magnetomotive force excited by the flyback transformer is relatively small, and the narrower side of the air gap is saturated or unsaturated, so that the inductance of the flyback transformer is reduced or even not reduced, and the optimization design of the variable inductance of the flyback transformer structure is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of flyback transformer structures, and in particular to a flyback transformer structure with variable inductance. Background Art

[0002] In photovoltaic and photovoltaic energy storage power generation systems, the auxiliary power system generally adopts a fixed-frequency flyback topology, draws power from the PV (photovoltaic energy storage power generation system) input, and provides power for the drive, communication, and control of the power tube; the current PV input voltage range is generally 120V-1000V. Due to the ultra-wide input voltage range, the design of the transformer cannot be taken into account. If it works in discontinuous mode within the full range, at a fixed operating frequency, within the full voltage input range, the peak current is fixed, but the discontinuous current peak will be very large, especially in the case of high-voltage input, the power tube conduction time is very short, due to the difference in power devices, the switch tube conduction time and turn-off time are inconsistent, and in the case of high-voltage input with a small conduction time, the proportion of the turn-on and turn-off time is relatively large, which will seriously lead to system instability; if it works in continuous mode, the required inductance is It is relatively large. In the case of low voltage input, a larger magnetic core is needed to ensure that the magnetic device will not saturate under low voltage and high current conditions. This is a huge challenge to cost and size. The mainstream design is generally to select a suitable inductance of the flyback transformer so that it can work in the continuous inductor current mode under PV low voltage input and in the discontinuous inductor current mode under high voltage input. However, even if such a compromise design is selected, the optimized design of the flyback transformer within the ultra-high voltage range cannot be guaranteed, and the peak current and core size of the flyback transformer cannot be taken into account. In addition, the flyback transformer structure currently on the market does not have the ability to prevent dust, sound insulation and noise reduction. The mounting holes on traditional flyback transformers are mostly fixed and cannot be adjusted as needed. Therefore, it is very meaningful for us to make improvements on this and propose a flyback transformer structure with variable inductance. Summary of the invention

[0003] The purpose of the present invention is to address the problems raised by the current background technology.

[0004] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions: A variable inductance flyback transformer structure is used to improve the above problems.

[0005] The specific application is as follows: It includes a flyback transformer body, a magnetic core is arranged on the middle outer package of the flyback transformer body, a main winding is fixedly installed on the middle inner wall of the magnetic core, a secondary winding is mounted on the outer wall of a side column on one side of the magnetic core, a high and low air gap is opened on the outer wall of the side column on the other side of the magnetic core, a base is fixed on the bottom outer wall of the flyback transformer body, a sound insulation and noise reduction component is arranged on the top outer wall of the base, fixing plates are fixed on the bottom outer walls on both sides of the base, and an adjustment mounting hole component is arranged on the top outer wall of the fixing plate.

[0006] As a preferred technical solution of the present application, the high and low air gaps are one or more of step air gaps and slope air gaps.

[0007] As a preferred technical solution of the present application, the main winding and the secondary winding are formed by wrapping a multi-layer PCB board.

[0008] As a preferred technical solution of the present application, the main winding and the secondary winding are formed by wrapping with copper foil tape.

[0009] As a preferred technical solution of the present application, the outer walls of the main winding and the secondary winding are coated with silicone resin coating.

[0010] As a preferred technical solution of the present application, the sound insulation and noise reduction component includes a covering frame symmetrically mounted on the outer walls on both sides of the base, guide wheels are rotatably installed on the inner walls at both ends of the covering frame, guide grooves are symmetrically opened on the outer walls on both sides of the base, and the guide wheels are clamped in the inside of the guide grooves, a covering airbag is connected to the outer wall between the covering frames, an air pump is installed on the top outer wall of the flyback transformer body, an air intake pipe is connected between the air delivery end of the air pump and the air intake end of the covering airbag, an installation box is installed on one outer wall of the base, and a bottom inner wall of the installation box is installed A circuit board is installed, and a PLC controller, a noise collection module, a noise opposite operation module and a sound wave cancellation module are installed on the top outer wall of the circuit board; a microphone and a speaker are installed on the outer wall of one side of the installation box; the electrical output end of the microphone is connected to the electrical input end of the noise collection module, and the electrical output end of the sound wave cancellation module is connected to the electrical input end of the speaker; an air release pipe is connected to the outer wall of one side of the covering airbag, one end of the air release pipe passes through the interior of the installation box, and a pressure relief valve is installed at one end of the air release pipe.

[0011] As a preferred technical solution of the present application, the adjusting mounting hole assembly includes a movable groove symmetrically opened on the top outer wall of the fixed plate, the movable blocks are arranged inside the movable grooves, and the top outer walls of the movable blocks are penetrated with mounting screw holes, sliding blocks are fixed on the outer walls on both sides of the movable block, sliding grooves are opened on the inner walls on both sides of the movable groove, the sliding block is inserted into the outer wall at one end of the inner part of the sliding groove and is penetrated with a transmission screw hole, a rotating shaft is penetrated inside the transmission screw hole, and both ends of the rotating shaft are rotatably connected to the inner walls at both ends of the sliding groove, a first thread is distributed on the outer wall of the rotating shaft, and the first thread and the transmission screw hole are screwed together, a handwheel is fixed on one end of the rotating shaft that passes through the outside of the fixed plate, a second thread is opened on the outer wall of the end of the rotating shaft, and a holding nut is screwed on the outer wall of the second thread.

[0012] As a preferred technical solution of the present application, an air filter is installed through the air suction end of the air pump.

[0013] As a preferred technical solution of the present application, the air inlet pipe and the air outlet pipe are both telescopic hoses.

[0014] As a preferred technical solution of the present application, a holding groove is provided on the outer wall of the end of the base corresponding to the holding nut.

[0015] Compared with the prior art, the present invention has the following beneficial effects: In the scheme of this application: The variable inductance flyback transformer structure has a stepped air gap or a sloped air gap on the outer wall of the core center column or the side column. According to Ampere's law, the magnetic flux in the core is determined by the magnetic field strength, that is, it is determined by the current in the magnetic field. When the core is close to saturation, the inductance value decreases. By using the stepped air gap or the sloped air gap, the saturation effect in the core starts from the narrower side of the air gap and gradually advances to the wider side. In the case of low voltage input, the magnetic motive force of the core is large, and the saturation is greatly advanced to the wider side, thereby reducing the inductance of the flyback transformer. In the case of high voltage input, the magnetic motive force excited by the flyback transformer is relatively small, and the narrower side of the air gap is saturated or unsaturated, so that the inductance of the flyback transformer is reduced very little or even does not decrease, thereby realizing the optimized design of the variable inductance of the flyback transformer structure. The flyback transformer works in a continuous mode or a discontinuous mode, and the working mode is determined by the inductance of the flyback transformer. The flyback transformer structure, through the setting of the sound insulation and noise reduction component, can inflate the covering airbag 704, so that it expands and covers the flyback transformer, thereby playing a role in dust and sound insulation of the flyback transformer, and has the ability of active silent noise reduction; by adjusting the setting of the mounting hole component, the position of the mounting screw hole on the flyback transformer can be adjusted as needed, which is beneficial to the positioning and installation of the flyback transformer in different environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional schematic diagram of a variable inductance flyback transformer structure provided in the present application; Figure 2 A schematic diagram of a magnetic core structure in a variable inductance flyback transformer structure provided in the present application; Figure 3 A schematic diagram of another magnetic core structure in a variable inductance flyback transformer structure provided in the present application; Figure 4 An enlarged structural diagram of region A in the variable inductance flyback transformer structure provided in the present application; Figure 5 A schematic diagram of a three-dimensional cross-section structure of a mounting box in a variable inductance flyback transformer structure provided in the present application; Figure 6 An enlarged structural diagram of region B in the variable inductance flyback transformer structure provided in the present application; Figure 7 This is an enlarged view of the structure of region C in the variable inductance flyback transformer structure provided in the present application.

[0017] Indicated in the figure: 1. Flyback transformer body; 2. Magnetic core; 3. Main winding; 4. Secondary winding; 5. High and low air gaps; 51. Slope air gap; 52. Step air gap; 6. Base; 7. Sound insulation and noise reduction components; 8. Fixing plate; 9. Adjustment mounting hole components; 10. Air filter element; 701, covering frame; 702, guide wheel; 703, guide groove; 704, covering airbag; 705, air pump; 706, air intake pipe; 707, installation box; 708, circuit board; 709, PLC controller; 710, noise collection module; 711, noise opposite operation module; 712, sound wave offset playback module; 713, microphone; 714, speaker; 715, air release pipe; 716, pressure relief valve; 901, moving groove; 902, moving block; 903, mounting screw hole; 904, slider; 905, slide groove; 906, transmission screw hole; 907, rotating shaft; 908, first thread; 909, hand wheel; 910, second thread; 911, holding nut. DETAILED DESCRIPTION

[0018] To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

[0019] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the invention claimed for protection, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0022] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invention product is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art. Such terms are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0023] like Figure 1 — Figure 7As shown, the present embodiment proposes a flyback transformer structure with variable inductance, including a flyback transformer body 1, a magnetic core 2 is arranged on the outer package of the middle part of the flyback transformer body 1, a main winding 3 is fixedly installed on the inner wall of the middle part of the magnetic core 2, a secondary winding 4 is mounted on the outer wall of a side column on one side of the magnetic core 2, and a high and low air gap 5 is opened on the outer wall of the side column on the other side of the magnetic core 2. The high and low air gap 5 is one or more of a step air gap 52 and a slope air gap 51. A base 6 is fixed on the bottom outer wall of the flyback transformer body 1, and a sound insulation and noise reduction component 7 is arranged on the top outer wall of the base 6. Fixed plates 8 are fixed on the bottom outer walls on both sides of the base 6, and an adjustment mounting hole component 9 is arranged on the top outer wall of the fixed plate 8. The flyback transformer in the variable inductance flyback transformer structure The main body 1 is a reference to the prior art. According to Ampere's law, the magnetic flux in the magnetic core 2 is determined by the magnetic field strength, that is, it is determined by the current in the magnetic field. When the magnetic core 2 is close to saturation, the inductance value decreases. By utilizing the high and low air gaps 5 (the step air gap 52 or the slope air gap 51), the saturation effect in the magnetic core 2 is gradually pushed from the narrower side of the air gap to the wider side. In the case of low voltage input, the magnetomotive force of the magnetic core 2 is large, and the saturation is pushed toward the wider part to a greater extent, thereby reducing the inductance of the flyback transformer. In the case of high voltage input, the magnetomotive force excited by the flyback transformer is relatively small, and the narrower side of the air gap is saturated or unsaturated, so that the inductance of the flyback transformer is reduced very little or even does not decrease, thereby realizing the optimized design of the variable inductance of the flyback transformer structure.

[0024] like Figure 1 , Figure 2 and Figure 3 As shown, as a preferred implementation mode, on the basis of the above-mentioned method, further, the main winding 3 and the secondary winding 4 are formed by winding a multi-layer PCB board, and the PCB board winding is manufactured by a printing process, and its parameter consistency is high, which can ensure the stable performance of the flyback transformer inductor. The PCB board has heat dissipation capability, and the multi-layer structure of the PCB winding increases the heat dissipation area, thereby improving the heat dissipation performance of the flyback transformer.

[0025] like Figure 1 , Figure 2 and Figure 3 As shown, as a preferred implementation mode, on the basis of the above-mentioned method, further, the main winding 3 and the auxiliary winding 4 are formed by copper foil tape winding. The copper in the copper foil tape winding has good conductivity. The thinner and wider copper foil tape can provide lower resistance and reduce energy loss. The wider copper foil tape has a larger surface area, which is conducive to heat dissipation, thereby improving the heat dissipation capacity of the winding and the heat dissipation performance of the flyback transformer.

[0026] like Figure 1 , Figure 2 and Figure 3As shown, as a preferred implementation mode, on the basis of the above-mentioned method, further, the outer walls of the main winding 3 and the secondary winding 4 are coated with a silicone resin coating, and the silicone resin has a very high resistivity, provides reliable insulation protection for the windings, and has good tolerance to various chemical substances such as acids, alkalis, and salts, so that the flyback transformer can maintain its insulation performance in harsh chemical environments. The silicone resin insulation layer has a certain flexibility, which effectively avoids the problem of cracking and damage of the insulation layer of the flyback transformer winding.

[0027] like Figure 1 , Figure 4 and Figure 5As shown, the sound insulation and noise reduction component 7 includes a covering frame 701 symmetrically mounted on the outer walls of both sides of the base 6, guide wheels 702 are rotatably installed on the inner walls at both ends of the covering frame 701, guide grooves 703 are symmetrically opened on the outer walls of both sides of the base 6, and the guide wheels 702 are clamped inside the guide grooves 703, a covering airbag 704 is connected to the outer wall between the covering frames 701, an air pump 705 is installed on the top outer wall of the flyback transformer body 1, an air intake pipe 706 is connected between the air delivery end of the air pump 705 and the air intake end of the covering airbag 704, and an installation box 707 is installed on one side of the outer wall of the base 6, and the installation box 70 A circuit board 708 is installed on the bottom inner wall of the airbag 707, a PLC controller 709, a noise collection module 710, a noise opposite operation module 711 and a sound wave cancellation module 712 are installed on the top outer wall of the circuit board 708, a microphone 713 and a speaker 714 are installed on the outer wall of one side of the installation box 707, the electrical output end of the microphone 713 is connected to the electrical input end of the noise collection module 710, the electrical output end of the sound wave cancellation module 712 is connected to the electrical input end of the speaker 714, and a deflation pipe 715 is connected to the outer wall of one side of the airbag 704. One end of the air pipe 715 passes through the interior of the installation box 707, and a pressure relief valve 716 is installed at one end of the air relief pipe 715. During the use of the flyback transformer, the compressed air generated by the air pump 705 can be controlled to be input into the interior of the covering airbag 704 through the air inlet pipe 706. The covering airbag 704 is inflated and expands to drive the covering frame 701 to unfold under the cooperation of the guide wheel 702 and the guide groove 703, which plays a role in dust and sound insulation for the flyback transformer. At the same time, the noise collection module 710 is controlled to work through the PLC controller 709, and the working noise of the flyback transformer is detected through the microphone 713. The collected noise data is transmitted to the noise opposite operation module 711, and the sound wave data with the opposite phase and the same amplitude as the noise is obtained by operation. The sound wave data is transmitted to the speaker 714 for playback through the sound wave offset playback module 712, which plays a role in offsetting the working noise of the flyback transformer and plays a role in active silencing and noise reduction of the flyback transformer. The above-mentioned covering airbag 704 is continuously inflated. When the air pressure inside reaches the threshold of the pressure relief valve 716, the excess air is discharged through the air relief pipe 715 and input into the installation box 707, which plays a role in blowing and cooling the circuit inside the installation box 707; Furthermore, an air filter element 10 is installed through the air intake end of the air pump 705, and the air intake of the air pump 705 is filtered through the air filter element 10; Furthermore, both the air inlet pipe 706 and the air deflation pipe 715 are telescopic hoses, which are beneficial for air delivery of the air inlet pipe 706 and the air deflation pipe 715 during the telescopic adjustment process of the airbag 704; like Figure 1 , Figure 6 and Figure 7As shown, the adjustment mounting hole assembly 9 includes a movable groove 901 symmetrically opened on the top outer wall of the fixed plate 8, a movable block 902 is arranged inside the movable groove 901, and a mounting screw hole 903 is opened on the top outer wall of the movable block 902, a slider 904 is fixed on the outer walls on both sides of the movable block 902, a slide groove 905 is opened on the inner walls on both sides of the movable groove 901, and the slider 904 is inserted into the outer wall of one end of the inner part of the slide groove 905 and a transmission screw hole 906 is opened through it, and a rotating shaft 907 is passed through the transmission screw hole 906, and the two ends of the rotating shaft 907 are rotatably connected to the inner walls of the two ends of the slide groove 905, a first thread 908 is distributed on the outer wall of the rotating shaft 907, and the first thread 908 is screwed and connected with the transmission screw hole 906, and the rotating shaft 907 is fixed at one end of the outer part of the fixed plate 8 The handwheel 909 and the outer wall of the end of the rotating shaft 907 are provided with a second thread 910, and the outer wall of the second thread 910 is threadedly connected with a holding nut 911. During the process of fixing and installing the flyback transformer by bolts, the rotating shaft 907 can be driven to rotate by turning the handwheel 909, and the slider 904 will be driven to feed and move in the slide groove 905 under the cooperation of the first thread 908 and the transmission screw hole 906, thereby driving the moving block 902 to move along the moving groove 901, so as to adjust the position of the mounting screw holes 903 at both ends of the flyback transformer. After the mounting screw holes 903 are positioned and adjusted, the holding nut 911 is tightened on the second thread 910 to brake the rotation of the rotating shaft 907, thereby achieving fixation after the mounting screw holes 903 are adjusted, which is beneficial to the positioning and installation of the flyback transformer in different environments.

[0028] Furthermore, a holding groove is provided on the outer wall of the end of the base 6 corresponding to the holding nut 911. When the holding nut 911 is tightened, its end is pressed inside the holding groove, thereby ensuring the braking of the rotating shaft 907 and ensuring the fixation of the mounting screw hole 903 after the position is adjusted.

[0029] Specifically, when the variable inductance flyback transformer structure is working / in use: the variable inductance flyback transformer structure has a high and low air gap 5 (a step air gap 52 or a slope air gap 51) on the outer wall of the middle column or the side column of the magnetic core 2 of the basic flyback transformer structure. During the use of the flyback transformer in photovoltaic and photovoltaic energy storage power generation systems, in the case of PV low voltage input, the exciting magnetomotive force is relatively large, so that the wider air gap is also saturated, thereby reducing the inductance of the flyback transformer. In the case of PV high voltage input, the exciting magnetomotive force of the flyback transformer is relatively small, and the narrower air gap is saturated or unsaturated, so that the flyback transformer The inductance is reduced very little or even does not decrease, realizing the optimized design of the variable inductance of the flyback transformer structure; during the use of the flyback transformer, the compressed air generated by the air pump 705 can be controlled to be input into the interior of the covering airbag 704 through the air inlet pipe 706, and the covering airbag 704 is inflated to drive the covering frame 701 to unfold under the cooperation of the guide wheel 702 and the guide groove 703, which plays a role in dust and sound insulation for the flyback transformer. At the same time, the noise collection module 710 is controlled by the PLC controller 709 to collect the working noise of the flyback transformer through the microphone 713, and the collected noise data The noise is transmitted to the noise opposite operation module 711, and the sound wave data with the opposite phase and the same amplitude as the noise is obtained by operation. The sound wave data is transmitted to the speaker 714 for playback through the sound wave offset playback module 712, which plays a role in offsetting the working noise of the flyback transformer and plays a role in active silencing and noise reduction of the flyback transformer. The above-mentioned covering airbag 704 is continuously inflated. When the air pressure inside reaches the threshold of the pressure relief valve 716, the excess air is discharged through the air relief pipe 715 and input into the installation box 707, which plays a role in blowing and cooling the circuit in the installation box 707. The flyback transformer is fixed and installed by bolts. During the installation process, the rotating shaft 907 can be driven to rotate by turning the hand wheel 909, and the slider 904 will be driven to feed and move in the slide groove 905 under the cooperation of the first thread 908 and the transmission screw hole 906, thereby driving the moving block 902 to move along the moving groove 901, so as to adjust the position of the mounting screw holes 903 at both ends of the flyback transformer. After the mounting screw holes 903 are positioned and adjusted, the holding nuts 911 are tightened on the second thread 910 to brake the rotation of the rotating shaft 907, thereby achieving fixation after the mounting screw holes 903 are positioned, which is beneficial to the positioning and installation of the flyback transformer in different environments.

[0030] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the invention are included in the scope of the claims of the present invention.

Claims

1. A variable inductance flyback transformer structure, characterized in that: The invention comprises a flyback transformer body (1), wherein a magnetic core (2) is arranged on the outer middle part of the flyback transformer body (1), a main winding (3) is fixedly mounted on the inner middle wall of the magnetic core (2), a secondary winding (4) is mounted on the outer wall of a side column on one side of the magnetic core (2), a high and low air gap (5) is provided on the outer wall of a side column on the other side of the magnetic core (2), a base (6) is fixed on the bottom outer wall of the flyback transformer body (1), a sound insulation and noise reduction component (7) is arranged on the top outer wall of the base (6), fixing plates (8) are fixed on the bottom outer walls of both sides of the base (6), and an adjustment mounting hole component (9) is arranged on the top outer wall of the fixing plate (8).

2. The variable inductance flyback transformer structure according to claim 1, characterized in that: The high and low air gaps (5) are one or more of a step air gap (52) and a slope air gap (51).

3. The variable inductance flyback transformer structure according to claim 1, characterized in that: The main winding (3) and the secondary winding (4) are formed by wrapping a multi-layer PCB board.

4. The variable inductance flyback transformer structure according to claim 1, characterized in that: The main winding (3) and the secondary winding (4) are formed by wrapping with copper foil tape.

5. The variable inductance flyback transformer structure according to claim 1, characterized in that: The outer walls of the main winding (3) and the secondary winding (4) are coated with organic silicon resin paint.

6. The variable inductance flyback transformer structure according to claim 1, characterized in that: The sound insulation and noise reduction component (7) comprises a covering frame (701) symmetrically mounted on the outer walls of both sides of the base (6), guide wheels (702) are rotatably mounted on the inner walls at both ends of the covering frame (701), guide grooves (703) are symmetrically opened on the outer walls of both sides of the base (6), and the guide wheels (702) are clamped inside the guide grooves (703), a covering air bag (704) is connected to the outer wall between the covering frames (701), an air pump (705) is mounted on the top outer wall of the flyback transformer body (1), an air intake pipe (706) is connected between the air delivery end of the air pump (705) and the air intake end of the covering air bag (704), a mounting box (707) is mounted on one outer wall of the base (6), and a circuit board (708) is mounted on the bottom inner wall of the mounting box (707), A PLC controller (709), a noise collection module (710), a noise inverse operation module (711) and a sound wave cancellation module (712) are installed on the top outer wall of the circuit board (708); a microphone (713) and a speaker (714) are installed on one side outer wall of the installation box (707); an electrical output end of the microphone (713) is connected to an electrical input end of the noise collection module (710); an electrical output end of the sound wave cancellation module (712) is connected to an electrical input end of the speaker (714); an air release pipe (715) is connected to one side outer wall of the covering airbag (704); one end of the air release pipe (715) passes through the interior of the installation box (707); and a pressure relief valve (716) is installed on one end of the air release pipe (715).

7. The variable inductance flyback transformer structure according to claim 1, characterized in that: The adjusting mounting hole assembly (9) comprises a movable groove (901) symmetrically arranged on the top outer wall of the fixing plate (8), a movable block (902) is arranged inside the movable groove (901), and a mounting screw hole (903) is provided through the top outer wall of the movable block (902), a slider (904) is fixed on the outer walls on both sides of the movable block (902), a slide groove (905) is provided on the inner walls on both sides of the movable groove (901), and a transmission screw hole (906) is provided through the outer wall of one end of the slider (904) inserted into the inner side of the slide groove (905), and the transmission screw hole (906) is provided through the outer wall of the slider (904). A rotating shaft (907) passes through the interior of the movable screw hole (906), and two ends of the rotating shaft (907) are rotatably connected to the inner walls of the two ends of the slide groove (905). A first thread (908) is distributed on the outer wall of the rotating shaft (907), and the first thread (908) is threadedly connected to the transmission screw hole (906). A hand wheel (909) is fixed to one end of the rotating shaft (907) that passes through the outside of the fixed plate (8). A second thread (910) is provided on the outer wall of the end of the rotating shaft (907), and a holding nut (911) is threadedly connected to the outer wall of the second thread (910).

8. The variable inductance flyback transformer structure according to claim 6, characterized in that: An air filter element (10) is installed through the air intake end of the air pump (705).

9. The variable inductance flyback transformer structure according to claim 6, characterized in that: The air inlet pipe (706) and the air discharge pipe (715) are both telescopic hoses.

10. The variable inductance flyback transformer structure according to claim 7, characterized in that: A pressing groove is provided on the outer wall of the end of the base (6) corresponding to the pressing nut (911).

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