Biosafety breathing machine and use method thereof

Abstract

The invention relates to a biological safety type breathing machine and a using method thereof.The biological safety type breathing machine comprises a shell, a gas channel located between a gas inlet and a gas outlet of the shell, a filter, an ultraviolet module, a power system, a mute system and a water tank system, and the filter, the ultraviolet module, the power system, the mute system and the water tank system are sequentially arranged on the gas channel; a spiral group hole, a silica gel sawtooth group hole, a horn matrix group hole, a memory alloy flow guide group hole and a V-shaped flow guide group groove are sequentially formed in the silencing box. Through the arrangement of the filter and the ultraviolet module, air filtration and sterilization are achieved, through the arrangement of the power system, power is provided, through the arrangement of the water tank system, air humidity is increased, and through the arrangement of the silencing system and the silencing box, multi-stage noise reduction and silencing are achieved, and therefore the treatment effect and the use experience of a patient are improved.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, especially to the technical field of medical devices for respiration, and specifically refers to a biosafe ventilator and its usage method. Background Art

[0002] Bi-level ventilators are a commonly used type of respiratory support device, widely applied in the treatment of patients with sleep apnea hypopnea syndrome, chronic obstructive pulmonary disease, etc. There are some problems in the use of existing bi-level ventilators. For example, bacteria and viruses in the air enter the human respiratory tract along with the air delivered by the ventilator, causing infections, and the noise is relatively large, affecting the patient's usage experience and sleep quality. Summary of the Invention

[0003] In view of the deficiencies of the prior art, the present invention provides a biosafe ventilator and its usage method, which can filter and disinfect harmful substances such as bacteria and viruses in the air, reduce noise, thereby improving the treatment effect and usage experience of patients.

[0004] The present invention is realized through the following technical solutions. A biosafe ventilator includes a housing, a gas channel located between the air inlet and air outlet of the housing, and a filter, an ultraviolet module, a power system, a noise reduction system, and a water tank system sequentially arranged on the gas channel. The noise reduction system includes a soundproof box, and the soundproof box is provided with a spiral group of holes, a silica gel serrated group of holes, a horn matrix group of holes, a memory alloy diversion group of holes, and a V-shaped diversion group of grooves arranged in sequence; The spiral group of holes includes a number of spiral holes arranged in a matrix and spirally arranged. The channel of the spiral holes gradually increases along the air flow direction, and the radius of the spiral holes increases in multiples along its axis; The silica gel serrated group of holes includes a number of secondary through holes arranged in a matrix, and a number of annular serrations made of silica gel material are arranged on the inner circumferential surface of the secondary through holes along their axes; The horn matrix group of holes includes a number of horn holes arranged in a matrix. The horn holes include a first horn hole, a second horn hole, and a horn tail hole arranged in sequence. The large-diameter end of the first horn hole is connected to the small-diameter end of the second horn hole, and the diameter of the small-diameter end of the first horn hole, the diameter of the horn tail hole, and the diameter of the small-diameter end of the second horn are adapted; The memory alloy diversion group of holes includes a diversion hole, a thermosensitive module located at the center of both end faces of the diversion hole, and a number of diversion sheets located between the thermosensitive module and the inner circumferential surface of the diversion hole and arranged in a fan shape and evenly distributed along the circumferential direction. The inner circumferential surface of the diversion sheet is connected to the thermosensitive module, and the outer circumferential surface is in contact connection with the inside of the diversion hole; The V-shaped diversion group of grooves includes a number of serrated grooves arranged along the air flow width direction and extending along the air flow transmission direction. Through the settings of the filter and the ultraviolet module, the present invention realizes the filtration and sterilization of air. Through the setting of the power system, power is provided. Through the setting of the water tank system, the air humidity is increased. Through the settings of the mute system and the mute box, multi-stage noise reduction and muting are achieved, thereby improving the treatment effect and user experience of patients.

[0005] Preferably, the filter is a HEPA high-efficiency filter. Through the setting of the HEPA high-efficiency filter in this preferred solution, most of the particles, bacteria, viruses, etc. are filtered.

[0006] Preferably, the ultraviolet module includes a sterilization box, a partition plate located in the sterilization box and forming a serpentine channel, and an ultraviolet radiation module located on each partition plate.

[0007] Through the setting of the serpentine channel in this preferred solution, the length of the air flow path is increased, thereby increasing the time for air to be irradiated by ultraviolet rays. In this solution, the ultraviolet radiation module is a number of UV-C LEDs arranged on the partition plate, and the number of UV-C LEDs forms a UV-C LED array.

[0008] Preferably, the power system includes a double-turbine system, and the double-turbine system includes an axial-centrifugal composite turbine and a magnetic levitation brushless turbine arranged in parallel.

[0009] Preferably, the water tank system includes a water box and a guide plate located in the water box and forming a serpentine channel. Through the setting of the guide plate in this preferred solution, sufficient humidification of the air is achieved.

[0010] Preferably, the guide vane includes a Ni-Ti alloy with a phase change temperature of 35°C. Through the setting of the Ni-Ti alloy in this preferred solution, deformation recovery is achieved, thereby realizing the change of the pore size.

[0011] Preferably, the outer surface of the soundproof box is coated with a nanotube patch layer and a sound-absorbing damping layer arranged in sequence from the inside to the outside. The nanotube patch layer is formed by coaxial nesting of chopped graphene, and the sound-absorbing damping layer includes polyurethane foam.

[0012] Through the setting of the nanotube patch layer in this preferred solution, the second-stage high-frequency airflow hissing sound is attenuated; the open-cell structure in the polyurethane foam of the sound-absorbing damping layer converts the broadband noise sound energy into heat energy.

[0013] Preferably, the housing includes an inner shell layer, an air buffer layer, and an outer shell layer arranged in sequence from the inside to the outside, and the inner shell layer is fiber sound-absorbing cotton.

[0014] In this preferred solution, the polyester fiber sound-absorbing cotton has good sound-absorbing performance and can effectively absorb and block the noise generated by the internal components from spreading outward. The setting of the air buffer layer further enhances the sound insulation effect.

[0015] Preferably, the inner side of the housing of the axial - centrifugal compound turbine is a graphene - silicone composite sound - absorbing coating with a thickness of 0.3 mm, and the outer layer is a 2K carbon fiber winding layer with a laying angle of ±45°, reducing the mass by 40%.

[0016] A method for using a biosafety ventilator includes the following steps: a. When air enters the instrument, after being filtered by a filter, it enters the ultraviolet module for sterilization and disinfection; b. When the dual - turbine system is working, during the inhalation phase, when the air - flow sensor detects an inhalation trigger signal and the flow threshold > 5 L / min, the axial - centrifugal turbine instantly speeds up to the target speed, accelerating the air flow; the diffuser channel of the axial - centrifugal turbine converts dynamic pressure into static pressure for output; During the exhalation phase, when the air - flow sensor detects the start of exhalation and the negative flow - rate change rate > 10 L / s², the axial - centrifugal turbine decelerates to the standby speed to maintain relatively stable pressure; the magnetic - levitation turbine compensates for the air leakage by adjusting the speed to maintain the target pressure fluctuation < ±0.5 cmH2O. The dual - turbine time - sharing load design extends the life of a single turbine; by adjusting the matching of the impeller diameter and speed, it can adapt to the treatment needs of multiple modes for adults / children; c. Then the air enters the sound - proof box, and the sound - proof box is provided with a five - stage noise - reduction structure. The first stage is a spiral group of holes. The radius of the spiral holes increases in multiples along its axis, with an increase multiple of 1.15 times. The spiral holes achieve efficient noise reduction through acoustic wave phase modulation and vortex energy redistribution. This is because acoustic waves generate a phase difference in the spiral path, attenuating noise; by designing the spiral parameters, destructive interference in the target frequency band is achieved. The spiral geometry causes the acoustic wave energy to converge towards the central axis, and through non - linear effects, the low - frequency energy is transferred to high frequencies for subsequent absorption. During this process, the air flow forms a secondary flow in the spiral holes, generating partial vortices, which are converted by the second stage; The second stage is a silicone saw - tooth group of holes. Made of silicone material, through continuous cross - sectional area transformation, the energy is transferred to higher frequencies. The silicone material effectively absorbs part of the vibration energy, and the outer - layer nanotube laminate can also effectively absorb high - frequency energy. The saw - tooth edges induce the conversion of micro - vortices into turbulence, reducing the vortex energy. The saw - tooth structure forms a variable - aperture structure, reducing acoustic wave reflection; The third stage is a horn matrix group of holes. The aperture of the front end of the first horn hole gradually increases, reducing the flow rate. The gradual change of the cross - section makes the impedance change smooth on the acoustic wave propagation path, reducing reflection; suppressing the turbulence intensity generated by the second stage. Through the setting of the second horn hole, the aperture is reduced, causing the channel to contract at this time, accelerating the air flow, breaking the remaining vortices not eliminated by the second stage. The acoustic wave energy is transferred to higher frequencies in the variable cross - section and is effectively absorbed by the outer - layer nanotube laminate; The fourth stage is a memory alloy guide hole group. The guide vanes are made of Ni-Ti alloy with a phase transition temperature of 35°C and a shape memory effect. The low-temperature martensite phase (<35°C) is soft and plastic, allowing external force to adjust the guide vane inclination to the target shape. The high-temperature austenite phase (≥35°C) automatically restores the preset inclination angle and provides driving force. The guide vanes are made into sheets and evenly arranged along the circumference. The center position of several guide vanes is a thermal module. The thermal module includes a micro heating wire with an integrated NTC thermistor to achieve closed-loop temperature control. When the temperature rises above 35°C during inhalation, the guide vanes become soft and the aperture increases. The heat released by the heating wire is adjusted according to the inhalation cycle. At the end of inhalation, the air takes away the heat and the guide vanes are cooled to below 35°C, and the aperture becomes smaller. The air flow velocity fluctuation is controlled by adjusting the aperture size, slowing down the accelerated airflow generated by the third stage, reducing the air flow fluctuation, and suppressing the resonance caused by the flow velocity change. The fifth stage is a V-shaped guide groove, with a sawtooth groove depth of 0.1-0.3mm and a spacing of 0.5-2mm. It is staggered at ±15° with the airflow direction, inducing the smooth near-wall airflow flowing into the fourth stage to form a stable laminar boundary layer. d. The gas that has passed through the silencer box is used by the patient after passing through the water tank system. The beneficial effects of the present invention are as follows: by setting the filter and the ultraviolet module, air filtration and sterilization are achieved; by setting the power system, power is provided; by setting the water tank system, air humidity is increased; by setting the silent system and the silent box, multi-stage noise reduction and silencing are achieved, thereby improving the patient's treatment effect and usage experience; the first stage is a spiral group of holes, and the radius of the spiral holes increases exponentially along its axial direction, with an increase of 1.15 times. The spiral holes achieve efficient noise reduction through sound wave phase modulation and vortex energy redistribution, because the sound waves produce a phase difference in the spiral path, attenuating the noise; by designing the spiral parameters, destructive interference in the target frequency band is achieved, and the spiral geometry causes the sound wave energy to converge toward the central axis, and the low-frequency energy is transferred to the high frequency through nonlinear action, which is convenient for subsequent absorption. In this process, the airflow forms a secondary flow in the spiral hole, generating partial vortex, which is converted by the second stage; The second level is a silicone sawtooth group of holes. Made of silicone material, it transfers energy to high frequencies through continuous cross-sectional area transformation. The silicone material effectively absorbs part of the vibration energy. The outer nanotube layer can also effectively absorb high-frequency energy. The sawtooth edge induces the conversion of tiny eddies into turbulent flows, reducing eddy energy. The sawtooth structure forms a variable aperture structure, reducing sound wave reflection. The third stage is a speaker matrix group of holes. The aperture at the front end of the first speaker hole gradually increases to reduce the flow rate. The gradual change in cross section makes the impedance change in the sound wave propagation path smooth and reduces reflections. The turbulence intensity generated by the second stage is suppressed. The second speaker hole is set to reduce the aperture and shrink the channel at this time, accelerating the airflow and breaking up the residual vortex that was not eliminated in the second stage. The sound wave energy is transferred to high frequency in the variable cross section and is effectively absorbed by the outer nanotube layer. The fourth stage features a shape memory alloy guide plate. The guide plates are made of Ni-Ti alloy with a phase transition temperature of 35°C and a shape memory effect. The low-temperature martensite phase (<35°C) is soft and pliable, allowing external force to adjust the guide plate angle to the desired shape. The high-temperature austenite phase (≥35°C) automatically restores the preset angle and provides driving force. The guide plates are fabricated into a sheet-like shape and evenly arranged along the circumference. A thermal module is located at the center of several guide plates. This module includes a micro-heating wire with an integrated NTC thermistor for closed-loop temperature control. When the temperature rises above 35°C during inhalation, the guide plates soften and the aperture increases. The heat released by the heating wire is adjusted according to the inhalation cycle. At the end of inhalation, the air removes the heat, cooling the guide plate temperature below 35°C and reducing the aperture. Adjusting the aperture size controls air velocity fluctuations, mitigating the accelerated airflow generated by the third stage, reducing airflow fluctuations, and suppressing resonance caused by velocity fluctuations.

[0017] The fifth stage is a V-shaped guide groove, with a sawtooth groove depth of 0.1-0.3mm and a spacing of 0.5-2mm; it is staggered at ±15° with the airflow direction, inducing the smooth near-wall airflow flowing in from the fourth stage to form a stable laminar boundary layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a side and rear view of the structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the present invention; Figure 4 It is a schematic diagram of the centrifugal turbine housing; Figure 5 Schematic diagram of the composition of each layer of the shell; Figure 6 This is a schematic diagram of the interior of the silencer box; Figure 7 This is a schematic diagram of the silencer box; Figure 8 Schematic diagram of the spiral group holes; Figure 9 Schematic diagram of the holes in the silicone sawtooth group and the speaker matrix group; Figure 10 Schematic diagram of the memory alloy diversion hole group; Figure 11Schematic diagram of the serpentine channel inside the ultraviolet module; As shown in the figure: 1. Main body, 2. Water tank system, 101. Intake channel, 102. Exhaust channel, 103. Housing, 104. Filter, 105. Ultraviolet module, 106. Axial-centrifugal composite turbine, 107. Magnetic levitation brushless turbine, 109. Airflow sensor, 1061. Thick graphene-silicone composite sound-absorbing coating, 1062. 2K carbon fiber winding layer, 1031. Outer shell, 1032. Air buffer layer, 1033. Sound-absorbing material layer, 20501. Intake port of the sound-absorbing box, 20502. Holes of the spiral group, 20503. Holes of the silica gel sawtooth group, 20504. Holes of the horn matrix group, 20505. Memory alloy diversion group holes, 20506. V-shaped diversion group grooves, 20507. Exhaust port of the sound-absorbing box, 20511. Water tank outlet of the water box, 20512. Water tank inlet of the water box, 20541. First horn hole, 20542. Second horn hole, 20543. Horn tail hole, 20551. Thermal module, 20552. Deflector. Specific implementation manner

[0019] To clearly illustrate the technical features of this solution, the following will elaborate on this solution through specific implementation manners.

[0020] Referring to the attached Figures 1-11 , a biosafety ventilator and its usage method of the present invention include a housing 103, a gas channel located between the intake and exhaust ports of the housing 103, and a filter 104, an ultraviolet module 105, a power system, a soundproofing system, and a water tank system 2 sequentially arranged on the gas channel. An airflow sensor 109 is also provided in the gas channel between the power system and the soundproofing system.

[0021] The housing 103 is provided with an intake channel 101 and an exhaust channel 102. Except for the intake channel 101 and the exhaust channel 102 through which air can freely enter and exit, all other parts of the housing 103 are sealed. The exhaust channel 102 is connected to a breathing mask.

[0022] The soundproofing system includes a sound-absorbing box. The outer surface of the sound-absorbing box is coated with a nanotube patch layer and a sound-absorbing damping layer arranged in sequence from the inside out. The nanotube patch layer is formed by coaxial nesting of chopped graphene. Through the setting of the nanotube patch layer, the second-level high-frequency airflow hissing sound is attenuated; the open-cell structure in the polyurethane foam of the sound-absorbing damping layer converts the broadband noise sound energy into heat energy.

[0023] The sound-absorbing box is provided with a spiral group of holes 20502, a silica gel sawtooth group of holes 20503, a horn matrix group of holes 20504, a memory alloy diversion group of holes 20505, and a V-shaped diversion group of grooves 20506 arranged in sequence; The spiral group holes 20502 include a number of spiral holes arranged in a matrix and spirally disposed. The channels of the spiral holes gradually increase in the air flow direction, and the radius of the spiral holes increases in multiples along its axis, with the increase multiple being 1.15 times, that is, the spiral line where the spiral holes are located is a frustum-shaped spiral line; The silica gel sawtooth group holes 20503 include a number of secondary through holes arranged in a matrix. A number of annular sawteeth made of silica gel material are provided on the inner circumferential surface of the secondary through holes and arranged along their axes; The horn matrix group cavities include a number of horn holes arranged in a matrix. The horn holes include a first horn hole 20541, a second horn hole 20542, and a horn tail hole 20543 arranged in sequence. The large-diameter end of the first horn hole 20541 is connected to the small-diameter end of the second horn hole 20542. The diameter of the small-diameter end of the first horn hole 20541, the diameter of the horn tail hole 20543, and the diameter of the small-diameter end of the second horn are adapted; The shape memory alloy flow guiding group holes 20505 include flow guiding holes, thermal sensitive modules located at the centers of both end faces of the flow guiding holes, and a number of flow guiding sheets 20552 located between the thermal sensitive modules and the inner circumferential surface of the flow guiding holes and arranged evenly in a fan shape along the circumference. The inner circumferential surface of the flow guiding sheets 20552 is connected to the thermal sensitive module. The thermal sensitive module includes a micro heating wire, and the micro heating wire integrates an NTC thermistor to achieve closed-loop temperature control. The outer circumferential surface is in contact connection with the inner part of the flow guiding hole; The flow guiding sheets 20552 are Ni-Ti alloys with a phase change temperature of 35°C.

[0024] The V-shaped flow guiding group grooves 20506 include a number of serrated grooves arranged along the air flow width direction and extending along the air flow transmission direction. The filter 104 is a HEPA high-efficiency filter 104.

[0025] The ultraviolet module 105 includes a sterilization box, a partition plate located in the sterilization box and forming a serpentine channel, and an ultraviolet radiation module located on each partition plate. Ultraviolet radiation modules are provided on both side surfaces of the partition plate in contact with air. The ultraviolet radiation module includes a number of UV-C LEDs provided on the partition plate, and a number of UV-C LEDs form a UV-C LED array. The UV-C LED is a prior art.

[0026] The power system includes a dual-turbine system. The dual-turbine system includes an axial-centrifugal composite turbine and a magnetic levitation brushless turbine 107 arranged in parallel. The inner side of the housing of the axial-centrifugal composite turbine is a graphene-silicone composite sound-absorbing coating with a thickness of 0.3 mm, and the outer layer is a 2K carbon fiber winding layer 10622, and the laying angle is ±45°.

[0027] The water tank system 2 includes a water box and a flow guide plate located in the water box and forming a serpentine channel. The water box is provided with a water tank outlet and a water tank inlet.

[0028] The housing 103 includes an inner shell layer, an air buffer layer 1032, and an outer shell layer arranged in sequence from the inside to the outside. The inner shell layer is made of fiber sound-absorbing cotton, and the sound-absorbing damping layer includes polyurethane foam. The polyester fiber sound-absorbing cotton has good sound-absorbing performance and can effectively absorb and block the noise generated by internal components from spreading outward. The setting of the air buffer layer 1032 further enhances the sound insulation effect.

[0029] A method for using a biosafety ventilator, characterized by comprising the following steps: a. When air enters the instrument, after being filtered by the filter 104, it enters the ultraviolet module 105 for sterilization and disinfection; b. When the dual-turbine system is working, during the inspiratory phase, the airflow sensor 109 detects an inspiratory trigger signal, and the flow threshold > 5 L / min; the axial-centrifugal turbine instantaneously speeds up to the target speed, and the airflow accelerates; the diffuser channel of the axial-centrifugal turbine converts the dynamic pressure into static pressure for output; During the expiratory phase, the airflow sensor 109 detects the start of exhalation, and the negative flow rate change rate > 10 L / s 2 ; the axial-centrifugal turbine decelerates to the standby speed to maintain the relative stability of the pressure; the magnetic levitation turbine compensates for the air leakage by adjusting the speed to maintain the target pressure fluctuation < ±0.5 cmH2O. The dual-turbine time-sharing load design extends the life of a single turbine; by adjusting the matching of the impeller diameter and speed, it can adapt to the treatment needs of multiple modes for adults / children; c. Then the air enters the soundproof box, and the soundproof box is provided with a five-stage noise reduction structure. The first stage is the spiral group holes 20502. The radius of the spiral holes increases in multiples along its axial direction, and the increase multiple is 1.15 times. The spiral holes achieve efficient noise reduction through acoustic wave phase modulation and vortex energy redistribution. This is because acoustic waves generate a phase difference in the spiral path, attenuating the noise; by designing the spiral parameters, destructive interference in the target frequency band is achieved. The spiral geometry causes the acoustic wave energy to converge towards the central axis, and the low-frequency energy is transferred to the high-frequency through non-linear effects, facilitating subsequent absorption. During this process, the airflow forms a secondary flow in the spiral holes, generating partial vortices, which are converted by the second stage; The second stage is the silicone sawtooth group holes 20503, made of silicone material. Through continuous cross-sectional area transformation, the energy is transferred to higher frequencies. The silicone material effectively absorbs part of the vibration energy, and the outer layer of nanotube laminates can also effectively absorb high-frequency energy. The sawtooth edges induce the conversion of small vortices into turbulence, reducing the vortex energy. The sawtooth structure forms a variable aperture structure, reducing acoustic wave reflection; The third stage is the speaker matrix group of holes 20504. The aperture of the first speaker hole 20541 gradually increases at the front end to reduce the flow rate. The gradual change in cross section smoothes the impedance change along the sound wave propagation path and reduces reflections. The turbulence intensity generated by the second stage is suppressed. The aperture is reduced by the second speaker hole 20542, causing the channel to contract at this time, accelerating the airflow and breaking up the residual vortex that was not eliminated in the second stage. The sound wave energy is transferred to high frequencies in the variable cross section and effectively absorbed by the outer nanotube layer. The fourth stage is the memory alloy guide hole group 20505, and the guide plate 20552 is made of Ni-Ti alloy with a phase transition temperature of 35°C, shape memory effect, and low-temperature martensite phase (<35°C): soft and plastic, allowing external force to adjust the inclination angle of the guide plate 20552 to the target shape. High-temperature austenite phase (≥35°C): automatically restores the preset inclination angle, provides driving force, and the guide vanes 20552 are made into sheets and evenly arranged along the circumference. The center position of several guide vanes 20552 is a thermal module, which includes a micro heating wire. The micro heating wire integrates an NTC thermistor to achieve closed-loop temperature control. When the temperature rises above 35°C during inhalation, the guide vane 20552 becomes soft and the aperture increases. The heat released by the heating wire is adjusted according to the inhalation cycle. At the end of inhalation, the air takes away the heat and the guide vane 20552 is cooled below 35°C, and the aperture becomes smaller. The air flow velocity fluctuation is controlled by adjusting the aperture size, the accelerated airflow generated by the third stage is slowed down, the air flow fluctuation is weakened, and the resonance caused by the flow velocity change is suppressed.

[0030] The fifth stage is a V-shaped guide group groove 20506, with a sawtooth groove depth of 0.1-0.3mm and a spacing of 0.5-2mm. It is staggered at ±15° with the airflow direction, inducing the smooth near-wall airflow flowing in from the fourth stage to form a stable laminar boundary layer. d. The gas that has passed through the silencer box passes through the water tank system 2 and is then used by the patient.

[0031] Of course, the above description is not limited to the above examples. Technical features not described in the present invention can be achieved by or by adopting existing technologies, which will not be described here. The above embodiments and drawings are only used to illustrate the technical solutions of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not depart from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A biosafety ventilator, comprising a housing (103), characterized in that: A gas passage between the air inlet and the air outlet of the housing (103), and a filter (104), an ultraviolet module (105), a power system, a noise reduction system, and a water tank system (2) sequentially arranged on the gas passage. The noise reduction system includes a soundproof box, and the soundproof box is provided with a spiral group of holes (20502), a silica gel serrated group of holes (20503), a horn matrix group of holes (20504), a shape memory alloy diversion group of holes (20505), and a V-shaped diversion group of grooves (20506) arranged in sequence; The spiral group of holes (20502) includes a plurality of spiral holes arranged in a matrix and spirally arranged. The channels of the spiral holes gradually increase in the air flow direction, and the radius of the spiral holes increases in multiples along its axial direction; The silica gel serrated group of holes (20503) includes a plurality of secondary through holes arranged in a matrix, and a plurality of annular serrations made of silica gel material are arranged on the inner circumferential surface of the secondary through holes along their axial directions; The horn matrix group of holes includes a plurality of horn holes arranged in a matrix. The horn holes include a first horn hole (20541), a second horn hole (20542), and a horn tail hole (20543) arranged in sequence. The large diameter end of the first horn hole (20541) is connected to the small diameter end of the second horn hole (20542), and the diameter of the small diameter end of the first horn hole (20541), the diameter of the horn tail hole (20543), and the diameter of the small diameter end of the second horn are adapted; The shape memory alloy diversion group of holes (20505) includes a diversion hole, a thermal sensitive module located at the centers of both end faces of the diversion hole, and a plurality of diversion fins (20552) located between the thermal sensitive module and the inner circumferential surface of the diversion hole and evenly arranged in a fan shape along the circumferential direction. The inner circumferential surface of the diversion fins (20552) is connected to the thermal sensitive module, and the outer circumferential surface is in contact connection with the inside of the diversion hole; The V-shaped diversion group of grooves (20506) includes a plurality of serrated grooves arranged along the air flow width direction and extending along the air flow transmission direction.

2. The biosafety ventilator according to claim 1, wherein: The filter (104) is a HEPA high-efficiency filter (104).

3. The biosafety ventilator according to claim 1, characterized in that: The ultraviolet module (105) includes a sterilization box, a partition plate located in the sterilization box and forming a serpentine channel, and an ultraviolet radiation module located on each partition plate.

4. The biosafety ventilator according to claim 1, wherein: The power system includes a double-turbine system, and the double-turbine system includes an axial-centrifugal composite turbine and a magnetic levitation brushless turbine (107) arranged in parallel.

5. The biosafety ventilator according to claim 1, characterized in that: The water tank system (2) includes a water box and a diversion plate located in the water box and forming a serpentine channel.

6. The biosafety ventilator according to claim 1, wherein: The diversion fins (20552) include a Ni-Ti alloy with a phase change temperature of 35°C.

7. The biosafety ventilator according to claim 4, wherein: The outer surface of the soundproof box is coated with a nanotube patch layer and a sound absorption damping layer arranged in sequence from the inside to the outside. The nanotube patch layer is made of graphene coaxial nesting chopped.

8. The biosafety ventilator according to claim 1, characterized in that: The housing (103) includes an inner shell layer, an air buffer layer (1032), and an outer shell layer arranged in sequence from the inside to the outside. The inner shell layer is fiber sound-absorbing cotton, and the sound absorption damping layer includes polyurethane foam.

9. The biosafety ventilator according to claim 7, characterized in that: The inner side of the housing of the axial-centrifugal compound turbine is coated with a 0.3-mm-thick graphene-siloxane composite sound-absorbing coating, and the outer layer is a 2K carbon fiber winding layer (10622) with a ply angle of ±45°.

10. The method for using the biosafety ventilator according to claim 9, wherein, It includes the following steps: a. When air enters the instrument, after being filtered by the filter (104), it enters the ultraviolet module (105) for sterilization and disinfection. b. When the dual-turbine system is working, during the suction phase, the airflow sensor (109) detects a suction trigger signal with a flow threshold > 5 L / min; the axial-centrifugal turbine instantly accelerates to the target speed, and the airflow accelerates; the diffuser channel of the axial-centrifugal turbine converts the dynamic pressure into static pressure for output. During the expiratory phase, the airflow sensor (109) detects the start of exhalation, and the negative flow rate change rate > 10 L / s 2 ; the axial-centrifugal turbine decelerates to the standby speed to maintain relatively stable pressure; the magnetic levitation turbine compensates for the air leakage by adjusting the speed to maintain the target pressure fluctuation < ±0.5 cmH2O. The dual-turbine time-sharing load design extends the life of a single turbine; by adjusting the impeller diameter to match the speed, it can adapt to the treatment needs of multiple modes for adults / children; c. Then the air enters the sound-absorbing box, and the sound-absorbing box is provided with a five-stage noise reduction structure. The first stage is a spiral group of holes (20502). The radius of the spiral holes increases in multiples along its axis, with an increase multiple of 1.15 times. The spiral holes achieve efficient noise reduction through acoustic wave phase modulation and vortex energy redistribution. This is because acoustic waves generate a phase difference in the spiral path, attenuating the noise; by designing the spiral parameters, destructive interference in the target frequency band is achieved. The spiral geometry causes the acoustic wave energy to converge towards the central axis, and through non-linear effects, the low-frequency energy is transferred to the high-frequency for subsequent absorption. During this process, the airflow forms a secondary flow in the spiral holes, generating some vortices, which are converted by the second stage. The second stage is a silicone sawtooth group of holes (20503). Silicone material is used. Through continuous cross-sectional area transformation, the energy is transferred to higher frequencies. The silicone material effectively absorbs part of the vibration energy, and the outer nanotube laminate can also effectively absorb high-frequency energy. The sawtooth edges induce the conversion of small vortices into turbulence, reducing the vortex energy. The sawtooth structure forms a variable aperture structure, reducing acoustic wave reflection. The third stage is a horn matrix group of holes (20504). The front aperture of the first horn hole (20541) gradually increases, reducing the flow rate. The gradual change of the cross-section makes the impedance change smooth on the acoustic wave propagation path, reducing reflection; suppressing the turbulence intensity generated by the second stage. Through the setting of the second horn hole (20542), the aperture is reduced, causing the channel to contract at this time, accelerating the airflow, breaking the remaining vortices not eliminated by the second stage. The acoustic wave energy is transferred to higher frequencies in the variable cross-section and is effectively absorbed by the outer nanotube laminate. The fourth level is the memory alloy guide hole group (20505), the guide plate (20552) is made of Ni-Ti alloy, the phase transition temperature is 35℃, the shape memory effect, the low temperature martensite phase (<35℃): soft and plastic, allowing external force to adjust the inclination angle of the guide plate (20552) to the target shape. High-temperature austenite phase (≥35°C): automatically restores the preset inclination angle, provides driving force, and the guide vanes (20552) are made into sheets and evenly arranged along the circumference. The center position of several guide vanes (20552) is a thermal module, which includes a micro heating wire. The micro heating wire integrates an NTC thermistor to achieve closed-loop temperature control. When the temperature rises to more than 35°C during inhalation, the guide vane (20552) becomes soft and the aperture increases. The heat released by the heating wire is adjusted according to the inhalation cycle. At the end of inhalation, the air takes away the heat to reduce the guide vane (20552) to below 35°C and the aperture becomes smaller. By adjusting the aperture size, the fluctuation of air flow rate is controlled, the accelerated airflow generated by the third stage is slowed down, the air flow fluctuation is weakened, and the resonance caused by the change in flow rate is suppressed. The fifth stage is a V-shaped guide groove (20506), with a sawtooth groove depth of 0.1-0.3mm and a spacing of 0.5-2mm; it is staggered at ±15° with the airflow direction, inducing the smooth near-wall airflow flowing into the fourth stage to form a stable laminar boundary layer; d. The gas that has passed through the silencer box passes through the water tank system (2) and is then used by the patient.

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