WO2016155083A1 - Procédé, appareil et système pour réguler la concentration d'oxygène d'un ventilateur - Google Patents

Procédé, appareil et système pour réguler la concentration d'oxygène d'un ventilateur Download PDF

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Publication number
WO2016155083A1
WO2016155083A1 PCT/CN2015/078481 CN2015078481W WO2016155083A1 WO 2016155083 A1 WO2016155083 A1 WO 2016155083A1 CN 2015078481 W CN2015078481 W CN 2015078481W WO 2016155083 A1 WO2016155083 A1 WO 2016155083A1
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flow rate
oxygen flow
target
current value
monitored
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PCT/CN2015/078481
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English (en)
Chinese (zh)
Inventor
成其新
赵晨
唐潮根
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深圳市科曼医疗设备有限公司
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Publication of WO2016155083A1 publication Critical patent/WO2016155083A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00—Control of flow

Definitions

  • the present invention relates to the field of ventilator technology, and in particular, to a ventilator oxygen concentration control method, apparatus and system.
  • the ventilator needs to provide air with adjustable oxygen concentration depending on the patient's condition. Control of oxygen concentration is very important for patients undergoing treatment.
  • the oxygen concentration control system in the ventilator is connected to the ventilator oxygen source to control the delivery of oxygen at the required oxygen concentration.
  • the traditional ventilator oxygen concentration control system often uses a pressure reducing valve to provide a constant pressure.
  • the pressure is constant, the proportional relationship between the oxygen flow rate and the opening degree of the proportional valve output is adjusted to adjust the opening degree of the proportional valve, thereby performing the oxygen concentration. control. If there is no pressure reducing valve to provide a constant pressure, there is no corresponding curve relationship between the oxygen flow rate and the opening degree of the proportional valve.
  • the conventional ventilator oxygen concentration control method cannot control the oxygen concentration under non-constant pressure.
  • the conventional ventilator oxygen concentration control system with a pressure reducing valve is often bulky and heavy, and is not suitable for use in a first-rate transport ventilator that requires high portability.
  • a ventilator oxygen concentration control method comprising:
  • the current value adjusts an opening degree of the proportional valve to obtain a monitored oxygen flow rate under the adjusted opening degree
  • the method further comprises:
  • the step of determining whether the target oxygen flow rate is consistent with the monitored oxygen flow rate is entered.
  • the calculating the target current value according to the target oxygen flow rate and the monitored oxygen flow rate, and adjusting the opening degree of the proportional valve according to the target current value comprises:
  • the current value is increased by a preset ratio
  • the current value is reduced by a preset ratio
  • the opening degree of the proportional valve is adjusted according to the current value after the turning up or down.
  • the obtaining the safety factor, obtaining the target current value according to the flow rate difference, the safety factor, and the monitoring oxygen flow rate includes:
  • the target current value is obtained according to the current value, the adjusted current value, and the safety factor.
  • the method further includes:
  • Obtaining the monitored monitored oxygen flow rate and/or the target oxygen flow rate when the monitored oxygen flow rate and/or the target oxygen flow rate are changed such that the monitored oxygen flow rate is inconsistent with the target oxygen flow rate, and the calculating the target oxygen flow rate is entered The step of monitoring the difference in flow rate of the oxygen flow rate.
  • a ventilator oxygen concentration control device comprising:
  • a first control module configured to control the opening degree of the proportional valve to be in a critical valve opening state, and obtain a monitored oxygen flow rate under the opening degree
  • the first control module is further configured to calculate a target current value according to the target oxygen flow rate and the monitored oxygen flow rate, adjust an opening degree of the proportional valve according to the target current value, and acquire the monitoring under the adjusted opening degree.
  • a first determining module configured to determine whether the target oxygen flow rate is consistent with the monitored oxygen flow rate, and if the target oxygen flow rate is inconsistent with the monitored oxygen flow rate, notifying the first control module to calculate a target according to the target oxygen flow rate and the monitored oxygen flow rate The current value, otherwise, informs the first control module to keep the opening of the proportional valve unchanged.
  • the first control module is further configured to maintain the opening of the proportional valve unchanged.
  • the first determining module is further configured to enter the second determining module if the target oxygen flow rate is inconsistent with the monitored oxygen flow rate, the device further comprising:
  • a second determining module configured to determine whether a preset number of breathing cycles is reached, and if not, notifying the first control module to calculate a target current value according to the target oxygen flow rate and the monitored oxygen flow rate, if a preset number of breathing cycles is reached, Then entering the second control module;
  • a second control module configured to calculate a flow rate difference between the target oxygen flow rate and the monitored oxygen flow rate, obtain a safety factor, and obtain a target current according to the flow rate difference, the safety factor, and the monitored oxygen flow rate And adjusting the opening degree of the proportional valve according to the target current value, obtaining the monitored oxygen flow rate under the current opening degree, and entering the first determining module.
  • the first control module is further configured to acquire a current value corresponding to the current opening degree, and if the target oxygen flow rate is greater than the monitoring oxygen flow rate, increase the current value by a preset ratio, if When the target oxygen flow rate is smaller than the monitoring oxygen flow rate, the current value is adjusted to be smaller than a preset ratio, and the opening degree of the proportional valve is adjusted according to the current value after the adjustment or the reduction.
  • the second control module is further configured to acquire a current value corresponding to the current opening degree, and obtain an adjusted current value according to the relationship between the current value, the monitored oxygen flow rate, the flow rate difference, and the adjusted current value. And obtaining a target current value according to the current value, the adjusted current value, and the safety factor.
  • the apparatus further includes:
  • a processing module configured to acquire the monitored oxygen after the change in the oxygen flow rate and/or the target oxygen flow rate after the opening of the proportional valve is maintained, such that the monitored oxygen flow rate is inconsistent with the target oxygen flow rate
  • the flow rate and/or target oxygen flow rate enters the second control module.
  • the ventilator oxygen concentration control method and device by acquiring the target oxygen flow rate of the ventilator, controlling the opening degree of the proportional valve to be in a critical valve opening state, and acquiring the monitored oxygen flow rate at the opening degree, according to the target oxygen flow rate and monitoring the oxygen flow rate Calculate the target current value, adjust the opening of the proportional valve according to the target current value, and obtain the monitored oxygen flow rate under the adjusted opening degree. If the target oxygen flow rate is inconsistent with the monitored oxygen flow rate, continue to calculate according to the target oxygen flow rate and the monitored oxygen flow rate. The target current value is adjusted again until the target oxygen flow rate is consistent with the monitored oxygen flow rate.
  • the target current value is calculated by the real-time feedback monitoring oxygen flow rate and the target oxygen flow rate, and the valve opening control value is obtained according to the correspondence relationship between the target current value and the valve opening control value, thereby adjusting the proportional valve.
  • the degree of opening can also control the oxygen concentration under non-constant pressure, that is, when the oxygen flow rate does not correspond to the opening degree.
  • a ventilator oxygen concentration control system includes a proportional valve, a flow detecting device, and a ventilator oxygen concentration control device provided by any of the above embodiments;
  • An output end of the proportional valve is connected to the flow rate detecting device, and the oxygen concentration control device is connected to the proportional valve and the flow rate detecting device;
  • An input end of the proportional valve is for inputting oxygen, the proportional valve controls an output oxygen flow rate, the flow detecting device is configured to detect an output monitored oxygen flow rate, and the ventilator oxygen concentration control device is configured to be based on a flow detecting device The monitored oxygen flow rate fed back controls the proportional valve.
  • the ventilator oxygen concentration control system described above does not require a pressure reducing valve to provide a constant pressure, and the ventilator oxygen concentration control device in any of the above embodiments can control the oxygen concentration under a non-constant pressure, and remove the decompression.
  • the valve can also work normally.
  • the ventilator oxygen concentration control system with the pressure reducing valve removed reduces the volume and mass of the ventilator oxygen concentration control, and is suitable for use in a ventilator that requires high portability.
  • FIG. 1 is a hardware environment diagram of an application of a ventilator oxygen concentration control method in one embodiment
  • FIG. 2 is a flow chart of a method for controlling oxygen concentration of a ventilator in an embodiment
  • Figure 3 is a flow chart showing a method of controlling ventilator oxygen concentration in another embodiment
  • Figure 4 is a flow chart showing the opening degree of the proportional valve in one embodiment
  • Figure 5 is a flow chart showing the target current value in one embodiment
  • Figure 6 is a block diagram showing the structure of a ventilator oxygen concentration control device in an embodiment
  • Figure 7 is a block diagram showing the structure of a ventilator oxygen concentration control device in another embodiment
  • Figure 8 is a block diagram showing the structure of a ventilator oxygen concentration control system in one embodiment.
  • FIG. 1 is a hardware environment diagram of an application of a ventilator oxygen concentration control method in an embodiment, including a filter core 110, a proportional valve 120, a flow sensor 130, and a ventilator oxygen concentration control device 140, wherein the ventilator oxygen concentration control device 140 is used
  • a method for controlling the oxygen concentration of a ventilator is realized.
  • the input end of the filter element 110 is connected to the air source device, and the gas source gas is input from the input end, and the impurities in the gas are filtered out through the filter core 110 to reach the input end of the proportional valve 120.
  • the ventilator oxygen concentration control device 140 controls the proportional valve 120 to output the required oxygen flow rate, and the oxygen output from the proportional valve 120 enters the flow sensor 130, and the flow sensor 130 obtains the actual monitored oxygen flow rate and feeds back to the ventilator oxygen concentration control.
  • Device 140, ventilator oxygen concentration control device 140 controls proportional valve 120 based on the monitored oxygen flow rate and the target oxygen flow rate of the ventilator.
  • a ventilator oxygen concentration control method comprising:
  • Step S210 obtaining a target oxygen flow rate of the ventilator.
  • oxygen flow The relationship between the oxygen concentration percentage value O 2 % of the ventilator and the ventilator tidal volume V T is calculated as the oxygen flow rate.
  • the relationship between them is expressed by the following equation:
  • oxygen flow can be obtained
  • the target oxygen flow rate L S is calculated. It can be understood that the oxygen concentration percentage value O 2 % of the ventilator, the ventilator tidal volume V T , the respiratory ratio I/E, and the respiratory frequency F can be customized according to needs, such as according to different patient actual conditions.
  • the target oxygen flow rate of the ventilator corresponding to the new parameter is retrieved.
  • the target oxygen flow rate of the ventilator is re-acquired for each breathing cycle, which applies to highly intelligent ventilators that automatically adjust the various parameters described above for each breathing cycle.
  • Step S220 controlling the opening degree of the proportional valve to be in a critical valve opening state, and acquiring the monitored oxygen flow rate under the opening degree.
  • the pre-stored critical valve opening control value is obtained, and the threshold valve opening control value is used to control the opening degree of the proportional valve to be in a critical valve opening state.
  • the critical valve opening state means that the force of opening the valve is just equal to the valve opening resistance inside the proportional valve, but the flow rate of the valve output is still zero.
  • the critical valve opening state corresponds to the critical valve opening current, and the critical valve opening current can be obtained by the critical valve opening current through the look-up table and stored. After the opening of the proportional valve is in the critical valve opening state, the monitoring oxygen flow rate at the current opening degree can be obtained by the flow sensor.
  • Step S230 calculating a target current value according to the target oxygen flow rate and the monitored oxygen flow rate, adjusting the opening degree of the proportional valve according to the target current value, and obtaining the monitored oxygen flow rate under the adjusted opening degree.
  • the adjustment algorithm obtains the target current value. If the target oxygen flow rate is greater than the monitored oxygen flow rate, the target current value is greater than the current value before the adjustment. If the target oxygen flow rate is smaller than the monitored oxygen flow rate, the target current value is smaller than the current value before the adjustment.
  • the target current value may be adjusted based on the current value corresponding to the critical valve opening state, or may be adjusted based on the current value corresponding to the current opening degree to obtain the target current value. Then, the valve opening control value corresponding to the target current value is obtained by looking up the table, thereby controlling the opening degree of the proportional valve. After the opening of the proportional valve is completed, the monitored oxygen flow rate under the adjusted opening degree is obtained in real time.
  • step S240 it is determined whether the target oxygen flow rate is consistent with the monitored oxygen flow rate. If the target oxygen flow rate does not coincide with the monitored oxygen flow rate, the process proceeds to step S230, otherwise, the process proceeds to step S250.
  • the process proceeds to step S250.
  • step S250 the opening degree of the proportional valve is kept unchanged.
  • the target oxygen flow rate is consistent with the monitored oxygen flow rate, and the adjustment is stopped. It can be understood that if the external conditions change, such as resetting the target oxygen flow rate or the change of the oxygen source pressure causes the monitored oxygen flow rate to change, so that the target oxygen flow rate and the monitored oxygen flow rate are again inconsistent, the process proceeds to step S230 again for adjustment.
  • the opening degree of the proportional valve is controlled to be in a critical valve opening state, and the monitored oxygen flow rate at the opening degree is obtained, and the target current value is calculated according to the target oxygen flow rate and the monitored oxygen flow rate. Adjusting the opening degree of the proportional valve according to the target current value, and obtaining the monitored oxygen flow rate under the adjusted opening degree. If the target oxygen flow rate is inconsistent with the monitored oxygen flow rate, the target current value is continuously calculated according to the target oxygen flow rate and the monitored oxygen flow rate, again Make adjustments until the target oxygen flow rate is consistent with the monitored oxygen flow rate.
  • the target current value is calculated by the real-time feedback monitoring oxygen flow rate and the target oxygen flow rate, and the valve opening control value is obtained according to the correspondence relationship between the target current value and the valve opening control value, thereby adjusting the proportional valve.
  • Opening degree in non-constant
  • the oxygen concentration can also be controlled under pressure, that is, when the oxygen flow rate does not correspond to the opening degree.
  • a ventilator oxygen concentration control method including:
  • Step S310 obtaining a target oxygen flow rate of the ventilator.
  • Step S320 controlling the opening degree of the proportional valve to be in a critical valve opening state, and acquiring the monitored oxygen flow rate under the opening degree.
  • Step S330 calculating a target current value according to the target oxygen flow rate and the monitored oxygen flow rate, adjusting the opening degree of the proportional valve according to the target current value, and obtaining the monitored oxygen flow rate under the adjusted opening degree.
  • step S340 it is determined whether the target oxygen flow rate is consistent with the monitored oxygen flow rate. If the target oxygen flow rate does not coincide with the monitored oxygen flow rate, the process proceeds to step S350, otherwise the process proceeds to step S390.
  • step S350 it is determined whether a preset number of breathing cycles has been reached. If not, the process proceeds to step S330, otherwise, the process proceeds to step S360.
  • continuous inhalation and exhalation are one breathing cycle, and a breathing cycle time can be set as needed.
  • a preset number of values may be set as needed.
  • the preset number of values is 1, and the valve opening is adjusted in step S330 during the first breathing cycle. After the first breathing cycle, Then, the valve opening degree is adjusted by steps S360 to S370.
  • step S360 a difference between the target oxygen flow rate and the monitored oxygen flow rate is calculated.
  • the difference in flow rate indicates that based on the monitoring oxygen flow rate L m , it is also necessary to adjust ⁇ L to reach the target oxygen flow rate.
  • Step S370 obtaining a safety factor, and obtaining a target current value according to the flow rate difference, the safety factor, and the monitoring oxygen flow rate.
  • the flow rate difference ⁇ L may be relatively large.
  • the flow rate was adjusted to obtain a security value ⁇ L i
  • the velocity difference [Delta] L and a safety factor of i then according to adjust the flow rate value [Delta] L safe i, [Delta] A safe adjustment of the current value of i, so that the opening degree corresponding to the current value of the current
  • the amplitude adjustment of the safety adjustment current value ⁇ A i is performed to obtain the target current value.
  • the adjusted current value ⁇ A is obtained according to the flow rate difference ⁇ L
  • the safe adjustment current value ⁇ A i is obtained according to the adjusted current value ⁇ A and the safety factor i , thereby performing safety adjustment on the current value corresponding to the current opening degree.
  • the amplitude of the current value ⁇ A i is adjusted to obtain a target current value, wherein the calculated relationship between the safety adjustment current value ⁇ A i and the safety factor i is customized as needed.
  • Step S380 adjusting the opening degree of the proportional valve according to the target current value, acquiring the monitored oxygen flow rate at the current opening degree, and proceeding to step S340.
  • the current value has a corresponding relationship with the valve opening control value
  • the valve opening control value corresponding to the target current value is obtained by looking up the table according to the target current value, thereby controlling the opening degree of the proportional valve.
  • the monitored oxygen flow rate under the adjusted current opening degree is obtained in real time.
  • Step S340 is again performed to compare the monitored oxygen flow rate at the current opening degree with the target flow rate value. In one embodiment, only one adjustment is made for one breathing cycle.
  • step S390 the opening degree of the proportional valve is kept unchanged.
  • step S330 includes:
  • Step S331 obtaining a current value corresponding to the current opening degree.
  • step S332 it is determined whether the target oxygen flow rate is greater than the monitored oxygen flow rate. If yes, the process proceeds to step S333, otherwise, the process proceeds to step S334.
  • step S333 if the target oxygen flow rate is greater than the monitored oxygen flow rate, the current value is increased by a predetermined ratio.
  • a n-1 represents the current value before the adjustment
  • a n represents the adjusted current value.
  • the current value corresponding to the current opening degree is substituted into the formula as A n-1 to obtain the current value after the adjustment.
  • step S334 if the target oxygen flow rate is smaller than the monitored oxygen flow rate, the current value is decreased by a preset ratio.
  • a n-1 represents the current value before the adjustment
  • a n represents the adjusted current value.
  • the current value corresponding to the current opening degree is substituted into the formula as A n-1 to obtain the current value after the adjustment.
  • -100 ⁇ b ⁇ preferably, -10 ⁇ b ⁇ 0.
  • step S335 the opening degree of the proportional valve is adjusted according to the current value after the adjustment or the adjustment.
  • the current value has a corresponding relationship with the valve opening control value, and the opening value corresponding to the current value is obtained by looking up the table according to the current value after the adjustment or the small adjustment, thereby controlling the opening degree of the proportional valve.
  • step S370 includes:
  • Step S371 obtaining a current value corresponding to the current opening degree.
  • step S372 the adjusted current value is obtained according to the relationship between the current value, the monitored oxygen flow rate, the flow rate difference, and the adjusted current value.
  • Step S373 obtaining a target current value according to the current value, the adjusted current value, and the safety factor.
  • the flow rate difference ⁇ L may be relatively large, and the corresponding adjustment current value ⁇ A is also relatively large.
  • the calculated relationship between the safety adjustment current value ⁇ A i and the safety factor i is customized as needed.
  • the method further comprises: acquiring a change when the monitored oxygen flow rate and/or the target oxygen flow rate are changed such that the monitored oxygen flow rate is inconsistent with the target oxygen flow rate. After the monitoring of the oxygen flow rate and/or the target oxygen flow rate, the process proceeds to step S360.
  • a change in the monitored oxygen flow rate and/or the target oxygen flow rate is caused.
  • the target oxygen flow rate is reset, and/or the pressure change of the oxygen source causes a change in the monitored oxygen flow rate
  • the monitored oxygen flow rate is inconsistent with the target oxygen flow rate.
  • a ventilator oxygen concentration control apparatus comprising:
  • the obtaining module 410 is configured to acquire a target oxygen flow rate of the ventilator.
  • the first control module 420 is configured to control the opening degree of the proportional valve to be in a critical valve opening state, and obtain the monitored oxygen flow rate under the opening degree.
  • the first control module 420 is further configured to calculate a target current value according to the target oxygen flow rate and the monitored oxygen flow rate, adjust the opening degree of the proportional valve according to the target current value, and obtain the monitored oxygen flow rate under the adjusted opening degree.
  • the first determining module 430 is configured to determine whether the target oxygen flow rate is consistent with the monitored oxygen flow rate. If the target oxygen flow rate is inconsistent with the monitored oxygen flow rate, notify the first control module 420 to calculate the target current value according to the target oxygen flow rate and the monitored oxygen flow rate; otherwise The first control module 420 is notified to keep the opening of the proportional valve unchanged.
  • the first control module 420 is also used to keep the opening of the proportional valve unchanged.
  • the first determining module 430 is further configured to enter the second determining module 440 if the target oxygen flow rate is inconsistent with the monitored oxygen flow rate.
  • the device further includes:
  • the second determining module 440 is configured to determine whether a preset number of breathing cycles is reached. If not, the first control module 420 is notified to calculate a target current value according to the target oxygen flow rate and the monitored oxygen flow rate. If a preset number of breathing cycles is reached, Then enter the second control module 450.
  • the second control module 450 is configured to calculate a flow rate difference between the target oxygen flow rate and the monitored oxygen flow rate, obtain a safety factor, and obtain a target current value according to the flow rate difference, the safety factor, and the monitored oxygen flow rate.
  • the opening degree of the proportional valve is adjusted according to the target current value, and the monitored oxygen flow rate at the current opening degree is obtained, and the first determining module 430 is entered.
  • the first control module 420 is further configured to obtain a current value corresponding to the current opening degree. If the target oxygen flow rate is greater than the monitored oxygen flow rate, the current value is increased by a preset ratio, if the target oxygen flow rate is greater than the monitored oxygen ratio. When the flow rate is small, the current value is reduced by a preset ratio, and the opening degree of the proportional valve is adjusted according to the current value after the adjustment or the small adjustment.
  • the second control module 450 is further configured to obtain a current value corresponding to the current opening degree, and obtain an adjusted current value according to the relationship between the current value, the monitored oxygen flow rate, the flow rate difference, and the adjusted current value, according to the current value. Adjust the current value and safety factor to get the target current value.
  • the apparatus further includes: a processing module for monitoring the oxygen flow rate and/or the target oxygen flow rate after the opening of the proportional valve is maintained, such that the monitored oxygen flow rate is inconsistent with the target oxygen flow rate At the time, the monitored monitored oxygen flow rate and/or the target oxygen flow rate are obtained and entered into the second control module 450.
  • a ventilator oxygen concentration control system including a proportional valve 510, a flow detecting device 520, and a ventilator oxygen concentration control device 530 in any of the above embodiments.
  • the output of the proportional valve 510 is connected to the flow rate detecting device 520, and the ventilator oxygen concentration control device 530 is connected to the proportional valve 510 and the flow rate detecting device 520.
  • the input of the proportional valve 510 is for inputting oxygen
  • the proportional valve 510 controls the output oxygen flow rate
  • the flow detecting device 520 is for detecting the output monitored oxygen flow rate
  • the ventilator oxygen concentration control device 530 is for monitoring based on the flow detecting device 520.
  • the oxygen flow rate controls the proportional valve 510.
  • the ventilator oxygen concentration control system does not require a pressure reducing valve to provide a constant pressure, and the ventilator oxygen concentration control device in any of the above embodiments can control the oxygen concentration under a non-constant pressure. It can also work normally when the pressure reducing valve is removed.
  • the ventilator oxygen concentration control system with the pressure reducing valve removed reduces the volume and mass of the ventilator oxygen concentration control, and is suitable for use in a ventilator that requires high portability.

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Abstract

L'invention concerne un procédé pour réguler la concentration d'oxygène d'un ventilateur, comprenant les étapes consistant à : acquérir le débit d'oxygène cible du ventilateur ; ajuster le degré d'ouverture de valves proportionnelles (120, 510) dans un état critique d'ouverture de valve, et acquérir le débit d'oxygène contrôlé sous ledit degré d'ouverture ; sur la base du débit d'oxygène cible et du débit d'oxygène contrôlé, calculer la valeur de courant électrique cible, et sur la base de la valeur du courant électrique cible, ajuster le degré d'ouverture des vannes proportionnelles (120, 510), et acquérir le débit d'oxygène contrôlé sous le degré d'ouverture ajusté ; déterminer si le débit d'oxygène cible et le débit d'oxygène contrôlé sont identiques, et si le débit d'oxygène cible contrôlé et le débit d'oxygène contrôlé ne sont pas identiques, entrer alors dans l'étape de calcul de la valeur du courant électrique cible sur la base du débit d'oxygène cible et du débit d'oxygène contrôlé ; dans le cas contraire, maintenir le degré d'ouverture des valves proportionnelles (120, 510). La concentration d'oxygène peut également être régulée sous pression instable. En outre, l'invention concerne également des appareils (140, 530) et un système de régulation de la concentration d'oxygène du ventilateur ; un système de régulation de l'oxygène du ventilateur sans valves de réduction de la pression réduit le volume et la masse du dispositif de régulation de la concentration d'oxygène du ventilateur, et convient à une utilisation dans un ventilateur portatif répondant à des normes élevées.
PCT/CN2015/078481 2015-04-01 2015-05-07 Procédé, appareil et système pour réguler la concentration d'oxygène d'un ventilateur WO2016155083A1 (fr)

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CN110051454A (zh) * 2019-05-28 2019-07-26 深圳市瑞沃德生命科技有限公司 呼吸机的通气控制方法
CN111411367B (zh) * 2020-04-13 2024-07-23 深圳安吉尔饮水产业集团有限公司 自适应活氧浓度发生装置
CN111984039B (zh) * 2020-08-21 2022-03-08 广东奥迪威传感科技股份有限公司 流速控制设备、方法和存储介质
CN112728192B (zh) * 2021-01-04 2023-03-14 上海一诺仪表有限公司 一种阀门控制方法、控制装置、控制设备及计算机设备
CN113883910B (zh) * 2021-10-19 2023-05-16 攀钢集团西昌钢钒有限公司 控制系统在节流流量计处于死区时控制调节阀的方法
CN114904115B (zh) * 2022-06-01 2023-05-23 广州和普乐健康科技有限公司 一种呼吸支持设备氧浓度自动控制方法及设备

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