A solar-powered active noise reduction ventilation device and method

Abstract

The present invention relates to the technical field of active noise reduction in ventilation ducts, and in particular to a solar-powered active noise reduction ventilation device and method, comprising: a ventilation duct, an air inlet and a filter; an active noise reduction assembly, comprising a noise collection component, a noise reduction controller and a noise reduction microphone; a passive noise reduction assembly, comprising a fan and blades; a control mechanism, comprising a rotating shaft, a solar panel and a sound insulation layer. The rotating shaft automatically adjusts the passive noise reduction and active noise reduction states of the fan according to the air intake volume of the ventilation duct, adapts to various application scenarios, does not require manual switching, is simple and convenient, automatically adjusts the air intake size of the filter and helps to scrape dust filtered on the surface of the sound insulation layer, automatically adjusts the movement state of the rotating shaft according to the air intake volume and the wind noise size, and simultaneously switches the solar panel power generation and the fan wind power generation to ensure the normal operation of the active noise reduction assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of active noise reduction in ventilation ducts, and in particular to a solar-powered active noise reduction ventilation device and method. Background Art

[0002] With the rapid development of industrialization and urbanization, noise pollution has become a global environmental problem, affecting people's health and quality of life. Traditional noise reduction devices mostly use passive noise reduction technology, such as sound insulation materials and noise barriers. Although they can reduce noise to a certain extent, they often have limitations. For example, the thickness and weight of passive noise reduction materials take up a lot of space and have limited effect on suppressing high-frequency noise. In addition, these devices usually rely on fixed power sources, which makes them unable to be used normally in remote areas or in environments with unstable power supply.

[0003] At present, the application of active noise reduction technology is gradually increasing, using anti-phase sound waves to offset noise, but most products have shortcomings in power supply and adaptability to environmental changes, and cannot meet the diverse needs of users. At the same time, many ventilation devices also have the problem of high wind noise during operation. It is very important to develop equipment that can eliminate noise during ventilation and achieve both noise reduction and ventilation functions.

[0004] The existing Chinese patent with publication number CN105927816A discloses a ventilation duct device with active noise reduction, including a ventilation duct on the noise space side and a ventilation duct on the noise reduction space side, the ventilation duct on the noise space side and the ventilation duct on the noise reduction space side are connected to each other, the ventilation duct on the noise reduction space side adopts a double-layer pipe, which is an inner pipe and an outer pipe that are respectively fitted on each other, and a ventilation interlayer is formed between the inner pipe and the outer pipe, at least one noise sensor is installed on the edge or inside of the ventilation duct on the noise space side, an electric speaker is installed inside the inner pipe, the noise sensor and the electric speaker are respectively connected to the noise reduction control circuit, the noise reduction control circuit receives the noise signal sent from the noise sensor, and the noise reduction control circuit drives the electric speaker. Since the sound wave plane emitted by the secondary sound source is parallel to the sound wave plane of the noise, a good broadband noise suppression effect can be obtained, and the air flow opening is opened near the noise cancellation section, so that the ventilation volume can be guaranteed while achieving a significant noise suppression effect.

[0005] However, since the above technical solution requires external power connection when in use, and the internal space of the ventilation duct is small, it is difficult to lay circuits, the disassembly and assembly process is difficult, and later maintenance is troublesome, and there is only one active noise reduction mode. The energy consumption is large when the active noise reduction is turned on at all times. It cannot automatically control the noise reduction mode switching according to the ventilation volume, and cannot automatically switch the power supply mode to save energy. At the same time, as the ventilation volume changes, the active noise reduction power cannot change synchronously to adapt to different application scenarios. Summary of the invention

[0006] Some simplifications or omissions may be made in this section and the abstract and title of the invention to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions shall not be used to limit the scope of the invention.

[0007] In view of the above problems in the prior art, the present invention is proposed.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions: a solar-powered active noise reduction ventilation device, comprising: a ventilation duct, an air inlet is provided at one end of the ventilation duct, at least two layers of filter screens are provided in parallel on the inner wall of the air inlet, and the filter screens are used to filter the incoming gas;

[0009] An active noise reduction assembly, comprising a noise collection component, a noise reduction controller and a noise reduction microphone, wherein the inner wall of the air inlet is provided with at least one of the noise collection components, and the noise reduction controller is used to control the power input parameters of the noise reduction microphone according to the information collected by the noise collection component;

[0010] A passive noise reduction assembly, comprising a fan disposed on the inner wall of the ventilation duct and a blade rotating in the fan, at least two noise reduction microphones are arranged in an array in the ventilation duct, and the rotation angle of the blade changes according to the switching between active noise reduction and passive noise reduction;

[0011] The control mechanism includes a rotating shaft coaxially arranged in the fan, a solar energy component arranged outside the ventilation duct and a sound insulation layer slidably arranged between the filter screens. When the rotating shaft rotates in an initial state, it drives the fan to rotate. When the rotating shaft moves and rotates, it controls the blades to adjust their angles and drives the sound insulation layer and the filter screen to move and overlap.

[0012] As a preferred solution of the solar-powered active noise reduction ventilation device described in the present invention, a rotating column is coaxially arranged inside the fan, a chuck is arranged inside the rotating column, one end of the blade rotates and penetrates into the fan, and the other end rotates and penetrates into the rotating column.

[0013] As a preferred solution of the solar-powered active noise reduction ventilation device described in the present invention, wherein: the fan end face is provided with a swivel that rotates coaxially, the noise reduction microphone circular array is arranged on the end face of the swivel, the outer wall of the swivel is provided with a protrusion, the blade is located at one end of the outer wall of the fan and is provided with a first swing arm, and the first swing arm is provided with a waist-shaped groove.

[0014] As a preferred solution of the solar-powered active noise reduction ventilation device of the present invention, wherein: the outer wall of the chuck is provided with a circumferential array of card slots, the outer wall of the rotating shaft is provided with a tray, the tray is provided with a slide groove, and the inner wall of the slide groove is provided with a slide column for sliding;

[0015] The sliding column slides through and is provided with a clamping block at one end close to the chuck, a first elastic member is sleeved on the outer wall of the sliding column, and an inclined surface and a right-angle surface are provided on the lower end surface of the clamping block.

[0016] As a preferred solution of the solar-powered active noise reduction ventilation device of the present invention, wherein: a sleeve disc is provided at one end of the rotating shaft close to the filter screen, a buffer groove is provided on the lower end surface of the sleeve disc, and a buffer block is provided on the outer wall of the rotating shaft;

[0017] A first connecting rod is provided on the outer wall of the sleeve disc, and the other end of the first connecting rod is rotatably sleeved with the noise reduction microphone. A first shifting block is also rotatably provided on the first connecting rod.

[0018] As a preferred solution of the solar-powered active noise reduction ventilation device of the present invention, wherein: the sliding column is provided with a third swing arm at one end of the sliding slot, the third swing arm is provided with a second shifting block, a support rod is also rotatably provided in the sliding slot, and the other end of the support rod is sleeved with a second swing arm;

[0019] The second swing arm has swing grooves symmetrically formed at both ends. The second shift block is slidably arranged in the swing groove on one side, and the swing groove on the other side is sleeved to the outside of the first shift block after moving upward following the rotating shaft.

[0020] As a preferred solution of the solar-powered active noise reduction ventilation device of the present invention, a sound insulation layer is slidably arranged between the filter screens, and air permeable grooves are penetrated through the sound insulation layer and the filter screens.

[0021] As a preferred solution of the solar-powered active noise reduction ventilation device described in the present invention, the end face of the sleeve is provided with a coaxial shaft, the end of the coaxial shaft is provided with a gear, and the filter screen and the sound insulation layer close to the coaxial shaft are provided with an adjustment groove.

[0022] As a preferred solution of the solar-powered active noise reduction ventilation device of the present invention, an upper rack and a centrally symmetrical lower rack are provided in the adjustment groove.

[0023] The present invention also discloses a solar-powered active noise reduction ventilation method, the steps of the solar-powered active noise reduction ventilation method are as follows:

[0024] S1, initial power supply mode detection, when the ventilation device is started, the sensor monitors the power generation of the solar panel and selects the power supply mode;

[0025] S2, monitor the air intake volume and wind noise, and continuously monitor the current air intake volume and wind noise level through the air volume sensor and noise collection component installed in the ventilation duct;

[0026] S3, automatic switching of noise reduction mode: when the air intake volume increases and the wind noise exceeds the preset threshold, the noise reduction mode is automatically triggered to switch to the active noise reduction function. At this time, the filter opening is adjusted according to the air intake volume, thereby increasing the fan speed and power generation;

[0027] S4. Adjust the filter air intake flow: According to the detected air volume data, the filter opening is automatically adjusted through the intelligent control mechanism to optimize the air intake to maintain the required fan speed;

[0028] S5. Execute noise reduction mode: In active noise reduction mode, the active noise reduction assembly collects noise signals in real time through the microphone, the control unit generates reverse sound waves using an algorithm, and the noise reduction microphone emits sound waves with a phase opposite to the noise to achieve noise reduction;

[0029] S6: Automatically adjust the power supply. According to the fluctuation of the air intake, monitor the output of wind power generation and solar power generation. When the power of the solar panel is insufficient and the wind is sufficient, increase the speed of the fan to increase the wind power generation power and ensure the stable power supply of the active noise reduction system.

[0030] S7, energy saving and mode restoration. When the air intake volume and noise level drop below the set threshold, the system automatically switches back to passive noise reduction mode and adjusts the filter to a small air intake state to reduce power consumption and maintain basic noise reduction effect.

[0031] The beneficial effects of the present invention are as follows: according to the amount of air entering the ventilation duct, the rotating shaft automatically adjusts the passive noise reduction state of the fan and switches to active noise reduction through power generation, and switches from solar power generation to wind power generation at the same time, adapting to various application scenarios, without the need for manual switching, simple and convenient, and automatically adjusting the air intake size of the filter to achieve switching between active noise reduction and passive noise reduction, switching from a small flow rate for passive noise reduction to a large flow rate air intake while increasing the fan speed and power generation efficiency, while helping to scrape away dust filtered on the surface of the sound insulation layer, and being able to automatically adjust the movement state of the rotating shaft according to the amount of air entering and the size of the wind noise, and simultaneously switching between solar panel power generation and fan wind power generation to ensure the normal operation of the active noise reduction assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0033] Figure 1 This is an overall schematic diagram of the solar-powered active noise reduction ventilation device of the present invention.

[0034] Figure 2It is a schematic diagram of the installation of the solar energy components in the present invention.

[0035] Figure 3 It is a schematic diagram of the internal structure of the ventilation duct in the present invention.

[0036] Figure 4 It is a partial enlarged schematic diagram of area A in the present invention.

[0037] Figure 5 It is a schematic diagram of the fan structure in the present invention.

[0038] Figure 6 It is a schematic diagram of the structure of the blades in the unfolded state in the present invention.

[0039] Figure 7 It is a schematic diagram of the structure of region B in the present invention.

[0040] Figure 8 It is a schematic diagram of the filter area structure in the present invention.

[0041] Reference numerals: 100, ventilation duct; 1001, sound insulation layer; 1002, air permeable groove; 1003, concentric shaft; 1004, gear; 1005, adjustment groove; 1006, upper rack; 1007, lower rack; 101, air inlet; 102, filter;

[0042] 200, noise reduction microphone;

[0043] 300, fan; 3001, rotating column; 3002, chuck; 3003, rotating ring; 3004, protrusion; 3005, first swing arm; 3006, waist groove; 3007, clamping groove; 3008, tray; 3009, slide groove; 301, blade; 3011, sliding column; 3012, clamping block; 3013, first elastic member; 3014, inclined surface; 3015, right-angle surface; 3016, sleeve; 3017, buffer groove; 3018, buffer block; 3019, first connecting rod; 3021, first shifting block; 3022, supporting rod; 3023, second swing arm; 3024, swinging groove; 3025, third swing arm; 3026, second shifting block;

[0044] 400. Rotating shaft; 401. Solar panel. DETAILED DESCRIPTION

[0045] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0046] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0047] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0048] Example 1

[0049] Reference Figure 1 to Figure 8 , which is the first embodiment of the present invention, provides a solar-powered active noise reduction ventilation device, including a ventilation duct 100, an active noise reduction assembly, a passive noise reduction assembly and a control mechanism. According to the amount of air intake, the active noise reduction and passive noise reduction modes are automatically switched, and at the same time, solar power generation is switched to wind power generation, which is suitable for various application scenarios, does not require manual switching, and is simple and convenient.

[0050] Specifically, a solar-powered active noise reduction ventilation device includes:

[0051] A ventilation duct 100, wherein an air inlet 101 is disposed at one end of the ventilation duct 100, and at least two layers of filter screens 102 are disposed in parallel on the inner wall of the air inlet 101, and the filter screens 102 are used to filter the incoming gas;

[0052] An active noise reduction assembly, including a noise collection component, a noise reduction controller and a noise reduction microphone 200, wherein at least one noise collection component is provided on the inner wall of the air inlet 101, and the noise reduction controller is used to control the power input parameters of the noise reduction microphone 200 according to the information collected by the noise collection component;

[0053] A passive noise reduction assembly includes a fan 300 disposed on the inner wall of a ventilation duct 100 and a blade 301 that rotates in the fan 300. At least two noise reduction microphones 200 are arranged in an array in the ventilation duct 100. The rotation angle of the blade 301 changes according to the switching between active noise reduction and passive noise reduction.

[0054] The control mechanism includes a rotating shaft 400 coaxially arranged in the fan 300, a solar panel 401 arranged outside the ventilation duct 100, and a sound insulation layer 1001 slidably arranged between the filters 102. When the rotating shaft 400 rotates in the initial state, it drives the fan 300 to rotate. When the rotating shaft 400 moves and rotates, it controls the blades 301 to adjust the angle and drives the sound insulation layer 1001 and the filter 102 to move and overlap.

[0055] Among them, the noise collection component collects the wind noise information entering the air inlet 101 and transmits it to the noise reduction controller. The noise reduction controller obtains the ventilation status and selects active noise reduction and passive noise reduction according to the ventilation status. During active noise reduction, the input power of the noise reduction microphone 200 is controlled according to the amount of wind noise to generate opposite sound waves to offset the noise.

[0056] More preferably, in this embodiment, the solar panel 401 is disposed on the outer wall of the ventilation duct 100 to generate electrical energy which is stored in a battery, and the battery is directly electrically connected to the active noise reduction assembly.

[0057] Preferably, a rotating column 3001 is coaxially provided inside the fan 300 , a chuck 3002 is provided inside the rotating column 3001 , one end of the blade 301 rotates and penetrates into the fan 300 , and the other end rotates and penetrates into the rotating column 3001 .

[0058] Among them, a swivel 3003 is provided on the end face of the fan 300 for coaxial rotation, a circular array of noise reduction microphones 200 is arranged on the end face of the swivel 3003, a protrusion 3004 is provided on the outer wall of the swivel 3003, and a first swing arm 3005 is provided at one end of the blade 301 located on the outer wall of the fan 300, and a waist-shaped groove 3006 is opened on the first swing arm 3005.

[0059] The protrusion 3004 is circular and slidably arranged inside the waist-shaped groove 3006. In the initial state, the protrusion 3004 and the waist-shaped groove 3006 are located on the same vertical line. When the rotating ring 3003 rotates left and right, it drives the first swing arm 3005 and the blade 301 to rotate.

[0060] More preferably, in the initial state, the blades 301 have a total of eight pieces and fit together to form a circular contour. The blades 301 are fan-shaped and designed with sound-absorbing materials. After the blades 301 rotate 45°, they play a role in guiding the airflow when the fan 300 rotates as a whole.

[0061] Among them, in this embodiment, when the blades 301 rotate and unfold, the fan 300 rotates to drive the connected shaft 400 to rotate to generate electricity. The greater the wind speed, the higher the wind noise. At the same time, the faster the rotation speed of the fan 300 and the shaft 400, the greater the current generated by the power generation, and the noise reduction microphone 200 electrically connected thereto generates a larger amplitude of reverse sound waves, thereby performing adaptive active noise reduction adjustment. The blades 301 form a passive noise reduction layer when they are in contact with each other. When there is no wind, the blades 301 are reset to the initial position driven by the spring, and the blades 301 are interlocked with each other and changed to a passive noise reduction mode, thereby adapting to various application scenarios. No manual switching is required, which is simple and fast.

[0062] Example 2

[0063] Reference Figure 1 to Figure 8, which is the second embodiment of the present invention, is based on the previous embodiment, except that, according to the ventilation volume, the rotating shaft 400 automatically adjusts the passive noise reduction state of the fan 300 and switches to active noise reduction by power generation.

[0064] Specifically, a circumferential array of clamping grooves 3007 is provided on the outer wall of the chuck 3002, a tray 3008 is provided on the outer wall of the rotating shaft 400, a sliding groove 3009 is provided on the tray 3008, and a sliding column 3011 is slidably provided on the inner wall of the sliding groove 3009.

[0065] The sliding column 3011 slides through to an end close to the chuck 3002 and a clamping block 3012 is provided. The outer wall of the sliding column 3011 is sleeved with a first elastic member 3013 . The lower end surface of the clamping block 3012 is provided with an inclined surface 3014 and a right-angle surface 3015 .

[0066] The first elastic member 3013 is a spring and its two ends are respectively connected to the lower end surface of the slide groove 3009 and the upper end surface of the clamping block 3012 , so as to always push the clamping block 3012 downward to engage with the clamping groove 3007 .

[0067] More preferably, if Figure 4 , Figure 6 and Figure 7 As shown, when the slide groove 3009 rotates counterclockwise, the slot 3007 slides in close contact with the inclined surface 3014, so that the chuck 3002 and the fan 300 cannot be rotated when the shaft 400 rotates. When the shaft 400 and the slide groove 3009 rotate clockwise, the chuck 3002 is driven to rotate synchronously through the engagement of the right-angle surface 3015 and the inner wall of the slot 3007.

[0068] Preferably, if Figure 8 As shown, a sleeve disc 3016 is provided at one end of the rotating shaft 400 close to the filter screen 102 , a buffer groove 3017 is provided on the lower end surface of the sleeve disc 3016 , and a buffer block 3018 is provided on the outer wall of the rotating shaft 400 .

[0069] Among them, the buffer block 3018 is a waist-shaped block, and the buffer groove 3017 is a waist-shaped groove, so that the buffer block 3018 has a certain angle of rotation buffer after moving into the buffer groove 3017, until the buffer block 3018 fits with the two side walls of the buffer groove 3017, and the rotating shaft 400 rotates to drive the sleeve 3016 to rotate.

[0070] More preferably, in other embodiments, the noise reduction microphones 200 are distributed in a circular array on the rotating ring 3003 and rotate along with the fan 300, thereby expanding the sound wave transmission effect and eliminating noise blind spots.

[0071] Preferably, if Figure 4As shown, a first connecting rod 3019 is provided on the outer wall of the sleeve 3016 , and the other end of the first connecting rod 3019 is rotatably sleeved with the noise reduction microphone 200 . A first shifting block 3021 is also rotatably provided on the first connecting rod 3019 .

[0072] Among them, a third swing arm 3025 is provided at one end of the slide column 3011 located in the slide slot 3009, and a second shift block 3026 is provided on the third swing arm 3025. A support rod 3022 is also rotatably provided in the slide slot 3009, and a second swing arm 3023 is sleeved on the other end of the support rod 3022.

[0073] More preferably, the second swing arm 3023 has swing grooves 3024 symmetrically formed at both ends, a second shifting block 3026 is slidably disposed in the swing groove 3024 on one side, and the swing groove 3024 on the other side is sleeved onto the outside of the first shifting block 3021 after moving upward with the rotating shaft 400 .

[0074] Preferably, the first shift block 3021 and the second shift block 3026 are both cylindrical, the swing groove 3024 is a waist-shaped groove, the first connecting rod 3019, the second swing arm 3023, and the third swing arm 3025 are all symmetrically distributed about the center of the rotating shaft 400, and a wind wheel is provided at the end of the rotating shaft 400. When air flows through, it drives the rotating shaft 400 to rotate and generates electricity to charge the battery. After the blades 301 are unfolded, the rotation of the fan 300 can also generate electricity through the generator and charge the battery.

[0075] In summary, in the initial state, the airflow is small, the rotation speed of the rotating shaft 400 is slow, the wind noise is small, and the blades 301 fit together to form a circular profile, which passively reduces the noise of the gas entering the ventilation duct 100. At the same time, the noise reduction microphone 200 uses the battery generated by the solar panel 401 to actively reduce the noise. At this time, the rotating shaft 400 drives the inclined surface 3014 on each card block 3012 to fit with the card slot 3007, so that the rotating shaft 400 rotates idly;

[0076] At the same time, when the gas flow increases, the rotation speed of the shaft 400 increases, and the wind noise is relatively large. At this time, the noise collection component reaches the monitoring threshold and controls the electric cylinder to slide forward while the shaft 400 rotates, so that the shaft 400 moves as a whole, and the first shift block 3021 slides into the swing groove 3024. The buffer block 3018 enters the buffer groove 3017 and drives the sleeve 3016 to rotate, thereby driving the noise reduction microphone 200 and the swivel 3003 to rotate through the first connecting rod 3019, and finally driving the waist-shaped groove 3006 to swing through the protrusion 3004, so that the blade 301 flips 45° from the horizontal fitting state, and the fan 300 is released from the passive noise reduction state, rotates with the airflow and generates electricity, while improving the input power and noise reduction effect of the noise reduction microphone 200.

[0077] Illustratively, at the same time, as the block 3012 moves forward with the shaft 400 and disengages from the slot 3007, the block 3012 and the slide post 3011 release the limit of the slot 3009 and can rotate, so that the first block 3021 drives the swing slot 3024 and the second swing arm 3023 to rotate, and then the second block 3026 and the third swing arm 3025 in the swing slot 3024 on the other side rotate, and finally drives the slide post 3011 to rotate, so that the right-angle surface 3015 and the inclined surface 3014 on the block 3012 are reversed, and then rebound to the slot 3007 driven by the first elastic member 3013, and finally the shaft 400 rotates synchronously with the fan 300 to generate electricity, thereby increasing the voltage input, so that the working power of the noise reduction microphone 200 is increased, and it automatically switches according to the wind volume and noise size to adapt to the scene of constantly changing wind volume.

[0078] Example 3

[0079] Reference Figure 1 to Figure 8 , which is the third embodiment of the present invention. This embodiment is based on the previous embodiment, but differs in that the air intake size of the filter 102 is automatically adjusted to achieve switching between active noise reduction and passive noise reduction, switching from a small flow rate for passive noise reduction to a large flow rate for air intake while increasing the fan 300 speed and power generation efficiency, and helping to scrape away dust filtered on the surface of the sound insulation layer 1001.

[0080] Preferably, a sound insulation layer 1001 is slidably provided between the filter screens 102 , and ventilation grooves 1002 are provided through the sound insulation layer 1001 and the filter screens 102 .

[0081] Among them, the sound insulation layer 1001 can slide in the filter 102, so that the sound insulation layer 1001 completely overlaps with the air permeable groove 1002 on the filter 102, and at the same time, the air permeable groove 1002 on the sound insulation layer 1001 also completely overlaps with the filter 102, and the entire filter 102 is closed. At this time, the air flow is small, so the gas flow rate when the sound insulation layer 1001 is closed is also reduced, and the polymer composite material of the filter 102 itself reduces the resonance of the airflow, and the sound insulation layer 1001 is a sound insulation material. When the two overlap with each other, the filter 102 is closed to reduce noise, thereby improving the passive noise reduction effect.

[0082] More preferably, a coaxial shaft 1003 is disposed on the end surface of the sleeve 3016 , a gear 1004 is disposed at the end of the coaxial shaft 1003 , and an adjustment groove 1005 is disposed on the filter screen 102 and the sound insulation layer 1001 close to the coaxial shaft 1003 .

[0083] An upper rack 1006 and a centrally symmetrical lower rack 1007 are disposed in the adjustment slot 1005 . The upper rack 1006 and the lower rack 1007 are arranged in parallel and mesh with the gear 1004 at the same time.

[0084] In summary, when in use, the gear 1004 is meshed with the upper rack 1006 and the lower rack 1007 at the same time in the initial state, so that the filter 102 is in a passive noise reduction state in the initial state, and the filter 102 overlaps with the sound insulation layer 1001 to absorb and reduce the noise of all incoming gases. As the air flow increases, the rotating shaft 400 is controlled by the electric cylinder to move outward, thereby driving the sleeve 3016 to rotate. At the same time, when the lower rack 1007 does not move, the upper rack 1006 moves with the sound insulation layer 1001, so that the filter 102 and the sound insulation layer are in a passive noise reduction state. The overlapping area of ​​1001 becomes smaller, and the air permeable groove 1002 is reopened to meet the air intake requirement of large flow rate gas. At the same time, the passive noise reduction is switched to active noise reduction. The increase in air intake will also increase the speed of the fan 300 and the power generation efficiency, thereby ultimately increasing the working power of the noise reduction microphone 200 and improving the active noise reduction effect. At the same time, the filter 102 and the sound insulation layer 1001 can also filter the external air. When the filter 102 moves, it rubs against the sound insulation layer 1001 to help scrape away the dust filtered on the surface of the sound insulation layer 1001.

[0085] Example 4

[0086] Reference Figure 1-Figure 8 , which is the fourth embodiment of the present invention, and this embodiment provides a solar-powered active noise reduction ventilation method. The method is implemented based on the above-mentioned solar-powered active noise reduction ventilation device, and can automatically adjust the movement state of the rotating shaft 400 according to the air intake volume and the wind noise size, and at the same time switch the solar component 401 to generate electricity and the fan 300 to generate wind power to ensure the normal operation of the active noise reduction assembly.

[0087] Specifically, a solar-powered active noise reduction ventilation method includes:

[0088] S1: Initial power supply mode detection: when the ventilation device is started, the sensor monitors the power generation of the solar module 401 and selects the power supply mode;

[0089] When solar power generation meets the power demand of the system, the system gives priority to solar power supply; if solar energy is insufficient, it automatically switches to wind power generation of fan 300 to maintain the normal operation of the active noise reduction assembly.

[0090] S2: Monitor the air intake volume and wind noise. The air volume sensor and noise detection sensor installed in the ventilation duct continuously monitor the current air intake volume and wind noise level.

[0091] When the air intake is low and the noise level is low, the system selects passive noise reduction mode to reduce energy consumption and maintain a stable noise reduction effect.

[0092] S3: Automatically switch the noise reduction mode: When the increase in the air intake volume is detected and the wind noise exceeds the preset threshold, the noise reduction mode is automatically triggered to switch and the active noise reduction function is started. At this time, the opening of the filter 102 is automatically adjusted to increase the air intake volume, thereby increasing the speed of the fan 300 and increasing the power generation power to ensure the normal power supply of the active noise reduction module.

[0093] S4: Adjusting the filter 102 and the air intake flow: According to the detected air volume data, the opening of the filter 102 is automatically adjusted through the intelligent control mechanism to optimize the air intake volume to maintain the required fan speed of 300.

[0094] Among other things, this process ensures that the noise reduction device can operate at optimal power in active noise reduction mode, thereby enhancing the noise reduction effect of the noise reduction microphone and noise reduction speaker.

[0095] S5: Execute noise reduction mode: In active noise reduction mode, the noise reduction system collects noise signals in real time through the microphone, the control unit uses an algorithm to generate reverse sound waves, and the speaker emits sound waves with a phase opposite to the noise to achieve noise reduction.

[0096] Among them, this algorithm is a reverse sound wave generation algorithm for active noise reduction, which belongs to the existing technology and will not be described in detail here. The sound wave output is dynamically adjusted according to the real-time noise changes to ensure the continuous optimization of the noise reduction effect.

[0097] S6: The power supply is automatically adjusted. According to the fluctuation of the air intake, the output of wind power generation and solar power generation is monitored. When the power of the solar panel 401 is insufficient and the wind is sufficient, the speed of the fan 300 is increased to increase the wind power generation power to ensure the stable power supply of the active noise reduction system.

[0098] S7: Energy saving and mode restoration. When the air intake volume and noise level drop below the set threshold, the system automatically switches back to the passive noise reduction mode and adjusts the filter 102 to a small air intake state to reduce power consumption and maintain basic noise reduction effect.

[0099] Among them, the solar-powered active noise reduction ventilation device maintains a cyclic operation during the monitoring, switching and execution process, ensuring efficient noise reduction in different application scenarios according to real-time environmental changes, and dynamically optimizing power supply selection to extend the system's working life and stability.

[0100] Importantly, it should be noted that the construction and arrangement of the present invention shown in a number of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, changes in orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete element may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to an alternative embodiment. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structure. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0101] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A solar-powered active noise reduction ventilation device, characterized in that: include: A ventilation duct (100), wherein an air inlet (101) is provided at one end of the ventilation duct (100), and at least two layers of filter screens (102) are provided in parallel on the inner wall of the air inlet (101), and the filter screens (102) are used to filter incoming gas; An active noise reduction assembly, comprising a noise collection component, a noise reduction controller and a noise reduction microphone (200), wherein the inner wall of the air inlet (101) is provided with at least one of the noise collection components, and the noise reduction controller is used to control the power input parameters of the noise reduction microphone (200) according to information collected by the noise collection component; A passive noise reduction assembly, comprising a fan (300) arranged on the inner wall of the ventilation duct (100) and blades (301) rotatably arranged in the fan (300); at least two noise reduction microphones (200) are arranged in an array in the ventilation duct (100); and the rotation angle of the blades (301) changes according to the switching between active noise reduction and passive noise reduction; The control mechanism comprises a rotating shaft (400) coaxially arranged in the fan (300), a solar energy component (401) arranged outside the ventilation duct (100), and a sound insulation layer (1001) slidably arranged between the filter screens (102); the rotating shaft (400) drives the fan (300) to rotate when rotating in an initial state; the rotating shaft (400) controls the blades (301) to adjust their angles when moving and rotating, and drives the sound insulation layer (1001) and the filter screen (102) to move and overlap; A rotating column (3001) is coaxially arranged inside the fan (300), a chuck (3002) is arranged inside the rotating column (3001), one end of the blade (301) rotates to penetrate into the fan (300), and the other end rotates to penetrate into the rotating column (3001); The end surface of the fan (300) is provided with a rotating ring (3003) for coaxial rotation, the noise reduction microphones (200) are arranged in a circular array on the end surface of the rotating ring (3003), the outer wall of the rotating ring (3003) is provided with a protrusion (3004), and the blade (301) is located at one end of the outer wall of the fan (300) and is provided with a first swing arm (3005), and the first swing arm (3005) is provided with a waist-shaped groove (3006).

2. The solar-powered active noise reduction ventilation device according to claim 1, characterized in that: The outer wall of the chuck (3002) is provided with a circumferential array of chuck grooves (3007), the outer wall of the rotating shaft (400) is provided with a tray (3008), the tray (3008) is provided with a slide groove (3009), and the inner wall of the slide groove (3009) is slidably provided with a slide column (3011); The sliding column (3011) slides through and is provided with a clamping block (3012) at one end close to the chuck (3002); a first elastic member (3013) is sleeved on the outer wall of the sliding column (3011); and a slope (3014) and a right-angle surface (3015) are provided on the lower end surface of the clamping block (3012).

3. The solar-powered active noise reduction ventilation device according to claim 2, characterized in that: A sleeve disc (3016) is provided at one end of the rotating shaft (400) close to the filter screen (102); a buffer groove (3017) is provided on the lower end surface of the sleeve disc (3016); and a buffer block (3018) is provided on the outer wall of the rotating shaft (400); The outer wall of the sleeve (3016) is provided with a first connecting rod (3019), the other end of the first connecting rod (3019) is rotatably sleeved with the noise reduction microphone (200), and the first connecting rod (3019) is also rotatably provided with a first shifting block (3021).

4. The solar-powered active noise reduction ventilation device according to claim 3, characterized in that: A third swing arm (3025) is provided at one end of the slide column (3011) located in the slide groove (3009), and a second shifting block (3026) is provided on the third swing arm (3025). A support rod (3022) is also rotatably provided in the slide groove (3009), and a second swing arm (3023) is sleeved on the other end of the support rod (3022); The second swing arm (3023) has swing grooves (3024) symmetrically formed at both ends. The second shift block (3026) is slidably disposed in the swing groove (3024) on one side, and the swing groove (3024) on the other side is sleeved onto the outside of the first shift block (3021) after moving upward following the rotating shaft (400).

5. The solar-powered active noise reduction ventilation device according to claim 4, characterized in that: A sound insulation layer (1001) is slidably arranged between the filter screens (102), and ventilation grooves (1002) are provided through the sound insulation layer (1001) and the filter screens (102).

6. The solar-powered active noise reduction ventilation device according to claim 5, characterized in that: The end surface of the sleeve (3016) is provided with a coaxial shaft (1003), the end of the coaxial shaft (1003) is provided with a gear (1004), and the filter screen (102) and the sound insulation layer (1001) close to the coaxial shaft (1003) are provided with an adjustment groove (1005).

7. The solar-powered active noise reduction ventilation device according to claim 6, characterized in that: An upper rack (1006) and a centrally symmetrical lower rack (1007) are provided in the adjustment groove (1005).

8. A solar-powered active noise reduction ventilation method, implemented based on a solar-powered active noise reduction ventilation device according to claim 7, characterized in that: include: S1, initial power supply mode detection, when the ventilation device is started, the sensor monitors the power generation of the solar panel (401) and selects the power supply mode; S2, monitor the air intake volume and wind noise, and continuously monitor the current air intake volume and wind noise level through the air volume sensor and noise collection component installed in the ventilation duct; S3, automatically switching the noise reduction mode: when it is detected that the air intake volume increases and the wind noise exceeds a preset threshold, the noise reduction mode is automatically triggered to switch, and the active noise reduction function is started. At this time, the opening of the filter (102) is adjusted according to the air intake volume, thereby increasing the speed of the fan (300) and increasing the power generation; S4, adjusting the air intake flow rate of the filter (102): according to the detected air volume data, automatically adjusting the opening of the filter (102) through the intelligent control mechanism, optimizing the air intake volume to maintain the required fan (300) speed; S5, executing the noise reduction mode: in the active noise reduction mode, the active noise reduction assembly collects noise signals in real time through the microphone, the control unit generates reverse sound waves using an algorithm, and the noise reduction microphone (200) emits sound waves with a phase opposite to the noise to achieve noise reduction; S6, automatically adjusting the power supply, monitoring the output of wind power generation and solar power generation according to the fluctuation of the air intake, and increasing the speed of the fan (300) to increase the wind power generation power when the solar panel (401) is short of power and the wind is sufficient, thereby ensuring the stable power supply of the active noise reduction system; S7, energy saving and mode restoration. When the air intake volume and noise level drop below the set threshold, the system automatically switches back to the passive noise reduction mode and adjusts the filter (102) to a small air intake state to reduce power consumption and maintain the basic noise reduction effect.

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