CN111529980B - Control system of disposable air filtering respirator - Google Patents
Control system of disposable air filtering respirator Download PDFInfo
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- CN111529980B CN111529980B CN202010350567.7A CN202010350567A CN111529980B CN 111529980 B CN111529980 B CN 111529980B CN 202010350567 A CN202010350567 A CN 202010350567A CN 111529980 B CN111529980 B CN 111529980B
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B7/00—Respiratory apparatus
- A62B7/10—Respiratory apparatus with filter elements
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
- A62B18/02—Masks
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
- A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B9/00—Component parts for respiratory or breathing apparatus
- A62B9/006—Indicators or warning devices, e.g. of low pressure, contamination
Abstract
The invention relates to the field of disposable respirator equipment, in particular to a control system of a disposable air filtering respirator, which comprises an air guide module, a speed measuring module, an air pressure sensing module, a control module and a power module, wherein the air guide module is used for introducing air to a respirator of the disposable air respirator at one time, the speed measuring module is used for measuring a rotating speed value when the air guide module introduces air, the air pressure sensing module is used for continuously detecting an air pressure value at a breathing position after the air guide module introduces air, the control module acquires the air pressure value and the rotating speed value, the control module controls the rotating speed of the air guide module to be increased or reduced according to the air pressure value and the rotating speed value, and the power module supplies power for the air guide module, the speed measuring module, the air pressure sensing module and the control module. The invention changes the rotating speed value of the air guide module according to the air pressure value, so that the user can continuously breathe air, and the discomfort of the user in the process of using the respirator is reduced.
Description
Technical Field
The invention relates to the field of disposable respirator equipment, in particular to a control system of a disposable air filtering respirator.
Background
Social industrialization and urbanization progress make the haze comparatively general to and the emergence of the urgent infectious diseases of society, just need take safeguard procedures to the face this moment, facial safeguard procedure mainly goes on with modes such as wearing gauze mask, keeps apart the pollutant of granule more than PM2.5 and the droplet that other people carried the germ through the gauze mask, and at present, keeps apart the best gauze mask product of effect and is N95 type gauze mask.
The N95 type mask can isolate smaller particles, the filtering efficiency of the N95 type mask on particles with the aerodynamic diameter of 0.075 μm +/-0.02 μm reaches over 95%, the aerodynamic diameter of air bacteria and fungal spores changes between 0.7-10 μm, the air bacteria and fungal spores are also in the protection range of the N95 type mask, the N95 type mask is tightly attached to the face and is not easy to leak air from the periphery, however, the N95 type mask is easy to breathe difficultly by a user due to good isolation performance after being worn for a long time, and even can generate dizziness due to oxygen deficiency, particularly for the old and children with weak constitution, so the face protection device capable of protecting the face of the user and smoothly breathing can be produced.
The existing face protection device comprises a breathing mask and a respirator for filtering air, wherein the respirator guides the air through a fan, the air is filtered by a filter medium and then conducted to the breathing mask for a user to breathe, the air guide quantity of the fan in the respirator is controlled by distinguishing different gears through keys, and due to the protection requirements of the user during working, if the user is matched with a protective suit and needs to be continuously used for a long period of time after wearing the protective suit, the protective suit can be taken down.
Disclosure of Invention
The present invention is directed to a control system for a disposable air filtration ventilator to prevent reuse of the respiratory protection device.
Disposable filtration breathing machine's in this scheme control system, including air guide module, the module of testing the speed, atmospheric pressure sensing module, control module and power module, air guide module is used for once only to the leading-in air of disposable air breathing machine's respirator, the rotational speed value when the module of testing the speed is used for measuring the leading-in air of air guide module, atmospheric pressure sensing module is used for continuously detecting the atmospheric pressure value of breathing department behind the leading-in air of air guide module, control module acquires atmospheric pressure value and rotational speed value, control module controls air guide module's rotational speed according to atmospheric pressure value and rotational speed value and increases or reduces, power module is air guide module, the module of testing the speed, atmospheric pressure sensing module and control module power supply.
The beneficial effect of this scheme is:
air for breathing is guided into a breathing mask of the disposable respirator through the air guide module, the air pressure value at the breathing position is detected by the air pressure sensing module, namely the air pressure value in the breathing mask is detected by the air pressure sensing module, meanwhile, the rotating speed value of the air guide module is measured by the speed measuring module, the air pressure value and the rotating speed value are obtained by the control module, the rotating speed value of the air guide module is controlled to be increased or decreased by the control module according to the air pressure value and the rotating speed value, for example, the rotating speed value of the air guide module is controlled to be increased to 1000r/min (when the air pressure value is smaller, the rotating speed of the air guide module is controlled to be increased) according to the current rotating speed value of 800r/min when the air pressure value is smaller than a certain threshold value, when the air pressure value is larger, the rotating speed of the air guide module is controlled to be decreased, the rotating speed value of the air guide module is changed according to the air pressure value, a user can continuously breathe the air, and discomfort of the user in the breathing process of using the respirator is reduced, and the power is supplied to the work of each module through a plurality of dry batteries, the cost of the dry batteries is low, and external leads are not needed for supplying power, so that the medical staff can use the dry batteries conveniently, and the moving range of the medical staff in the using process is not limited by the leads.
Further, the power supply device also comprises a detection module, and the detection module detects the electric quantity and the service life of the power supply module.
The beneficial effects are that: the electric quantity and the service life of the power supply module are detected, so that a user can directly know the use state of the breathing machine, and the problem that the power supply module is not electrified to cause inconvenient replacement in the use process is avoided.
The control module acquires electric quantity and service life, controls the alarm module to alarm the electric quantity when the electric quantity is smaller than a residual threshold value, and controls the alarm module to alarm the service life when the service life is smaller than a service life threshold value.
The beneficial effects are that: when the electric quantity and the service life of the power supply module are detected to be insufficient, the alarm modules respectively give an alarm, so that a user can timely notice the state of the power supply module, and the alarm modules respectively give an alarm to distinguish different states of the power supply module.
Further, the control module controls the alarm module to give a speed alarm when the rotating speed value is smaller than the speed threshold value.
The beneficial effects are that: and speed alarm is carried out when the rotating speed value of the air guide module is small and abnormal, so that the state of the internal components of the breathing machine is known in time.
Further, the power module includes a switch unit, the switch unit sends a continuous signal as a shutdown signal or a pulse signal as a startup signal to the control module, the control module controls the air guide module to stop rotating after acquiring the shutdown signal, the control module controls the air guide module to start rotating after acquiring the startup signal, and the control module controls the alarm module to perform shutdown alarm after acquiring the shutdown signal.
The beneficial effects are that: the working state of the air guide module is controlled through the switch unit, and the air guide module stops when the shutdown signal is acquired from the switch unit, so that the air guide module is simple and convenient to use.
The wind guide module is used for controlling the wind guide module to increase the rotating speed, and the control module acquires electric quantity, service life, air pressure value and rotating speed value for judgment before acquiring the speed increasing signal.
The beneficial effects are that: the speed-up signal is input through the fully-loaded acceleration module, and the use requirement of a user can be met.
Further, the control module records the used state after acquiring the starting signal for the first time, and keeps the rotation stopping state of the air guide module after acquiring the starting signal again.
The beneficial effects are that: after the air guide module is used for the first time and started up through the switch unit, the used state is recorded by the control module, and the stop rotation state of the air guide module is kept after the control module acquires the starting-up signal again, namely, the air guide module is used for one time, so that cross infection caused by repeated use is prevented.
Further, the control module controls the air guide module to reduce the rotating speed when the air pressure value is larger than the upper limit breathing threshold value, and controls the air guide module to increase the rotating speed when the air pressure value is smaller than the lower limit breathing threshold value.
The beneficial effects are that: the rotating speed of the air guide module is changed according to the air pressure value at the breathing position, so that a user can breathe enough air when using the breathing machine.
Further, the control module adds an acquired time node when acquiring the air pressure value, the control module subtracts the air pressure value acquired at a fixed time for a long time period after acquiring the speed-up signal to obtain an air pressure difference, the control module compares the air pressure difference with a difference threshold value, and the control module increases a lower limit breathing threshold value when the air pressure difference is smaller than the difference threshold value.
The beneficial effects are that: when the control module controls the air guide module to pressurize the breathing mask according to the acceleration signal, the condition of pressurization in the mask is judged in real time, the air pressure difference is used for judging, the lower limit breathing threshold of the breathing mask in different use states (tightness degree) is changed, and the problem that breathing is unsmooth due to the fact that the rotating speed of the air guide module is adjusted by the same lower limit breathing threshold in different use states of the breathing mask is avoided.
Further, the alarm module comprises a plurality of LED indicator lamps with different colors.
The beneficial effects are that: the LED indicating lamps with different colors can carry out different alarm indications, so that different alarm conditions are facilitated.
Drawings
FIG. 1 is a schematic block diagram of a first embodiment of a control system for a disposable air filtration ventilator in accordance with a first embodiment of the present invention;
fig. 2 is a block diagram of a first implementation flow of a control system of a disposable air filtration ventilator in accordance with a first embodiment of the present invention.
Detailed Description
The following is a more detailed description of the present invention by way of specific embodiments.
Example one
A control system for a disposable air filtration ventilator, as shown in fig. 1: the device comprises a power supply module, a wind guide module, a speed measurement module, an air pressure sensing module, a control module, a detection module, an alarm module and a full-load acceleration module, wherein the wind guide module can use 4056 fans or other suitable fans, the power supply module uses a plurality of dry batteries, the dry batteries can use 32, every eight dry batteries are connected in series to form a group of 12V, 4 groups of parallel driving fans are arranged, the wind guide module can be provided with three leads, such as a power line, a ground line and an FG speed output line, the rotating speed of the fans is controlled by controlling the power supply voltage, the FG speed output line is connected with the speed measurement module through signals, the rotating speed of the wind guide module is measured by the speed measurement module from the FG speed output line, the air pressure sensing module can use a sensor of BOSCH BMP280 model, the control module can use a single chip microcomputer of STM32F2 series, the power supply module, the wind guide module, the speed measurement module, the control module, the detection module, the alarm module and the full-load acceleration module are packaged in a shell of a breathing machine, the breathing machine is worn on the waist of a user through a belt and the like, and the air pressure sensing module is installed in the breathing mask to detect the air pressure value. The respirator and the breathing mask conduct the filtered air through the air duct.
The power supply module supplies power to the air guide module, the speed measurement module, the air pressure sensing module and the control module, the air guide module rotates to guide air to the breathing mask of the disposable air breathing machine once, the once air guide is not used again after being used once (the once air guide is not used after air guide), the speed measurement module measures the rotating speed value of the air guide module when the air guide module guides air, the air pressure sensing module continuously detects the air pressure value of the air guide module at the breathing position after the air guide module guides air, the air pressure value is the air pressure in the breathing mask of the breathing machine, the control module obtains the air pressure value and the rotating speed value, the control module controls the rotating speed of the air guide module to be increased or decreased according to the air pressure value and the rotating speed value, the control module controls the air guide module to decrease the rotating speed when the air pressure value is larger than the upper limit breathing threshold value, the upper limit breathing threshold value can be set to be 10CFM or other values according to actual conditions, the control module controls the air guide module to increase the rotating speed when the air pressure value is smaller than a lower limit breathing threshold value, and the lower limit breathing threshold value can be set to be 4 CFM.
The detection module detects the electric quantity and the service life of the power module, and the detection principle of the detection module to the electric quantity and the service life is as follows: the battery is discharged by the electronic loading machine in advance, the fan is simulated, the discharge curve is recorded by the detection module, the battery voltage is measured from the discharge curve by the control module (namely a single chip microcomputer) during actual use to estimate the electric quantity, and the service life is calculated according to the voltage, the current and the used capacity after the electric quantity is estimated by the control module.
The control module obtains electric quantity and service life, the control module controls the alarm module to alarm when the electric quantity is smaller than a residual threshold value, the residual threshold value of the electric quantity can be set to be 50% of the initial electric quantity, the control module controls the alarm module to alarm when the service life is smaller than the residual threshold value, the control module controls the alarm module to alarm at a speed when a rotating speed value is smaller than a speed threshold value, the power supply module comprises a switch unit, the switch unit can be switched by using the existing signal, the switch unit sends a continuous signal to the control module to serve as a shutdown signal or a pulse signal to serve as a startup signal, the control module controls the air guide module to stop rotating after obtaining the shutdown signal, the control module controls the air guide module to start rotating after obtaining the startup signal, the control module controls the alarm module to alarm at a shutdown state after obtaining the shutdown signal, and the alarm module can alarm at different types through different sounds.
The full-load acceleration module inputs an acceleration signal to the control module, the full-load acceleration module can use the existing button switch, the control module controls the air guide module to increase the rotating speed according to the acceleration signal, the control module acquires electric quantity, service life, air pressure value and rotating speed value before acquiring the acceleration signal to judge, and the control module can control the rotating speed of the air guide module by controlling the voltage of the air guide module.
The control module records a used state after acquiring the starting signal for the first time, for example, when the device is taken for use, the control module keeps a rotation stop state of the air guide module after acquiring the starting signal again, for example, when the control module acquires the shutdown signal and shuts down, the control module acquires the starting signal again, and keeps the rotation stop state of the air guide module, that is, the control module does not control the air guide module to start.
As shown in fig. 2, the specific implementation process is as follows:
when the medical staff A uses the disposable air filtering respirator, a starting signal is sent to the control module by clicking the switch unit, meanwhile, the control module records the used state according to the starting signal, the power supply module supplies power to the air guide module, the speed measuring module, the air pressure sensing module and the control module, the control module controls the air guide module to start, namely, the fan rotates to guide in air, the rotating speed value is output to the speed measuring module through an FG speed output line when the fan rotates, the speed measuring module sends the rotating speed value to the control module, the detection module detects the electric quantity and the service life of the power supply module and sends the electric quantity to the control module, the control module controls the alarm module to alarm when the electric quantity is less than the residual threshold value, the electric quantity is not enough, the control module controls the alarm module to alarm when the service life is less than the service life threshold value, and the service life is not enough, the control module controls the alarm module to give an alarm when the acquired rotating speed value is smaller than the speed threshold value, the control module judges whether the air pressure value reaches the standard or not, when the air pressure value is smaller than the lower limit breathing threshold value, the control module controls the alarm module to give an alarm when the air pressure value is abnormal, and in the using process of the disposable air filtering respirator, the control module controls the alarm module to give an alarm when the control module acquires a shutdown signal.
When the electric quantity is enough, the service life is enough, the speed value is enough, the air pressure value is normal and the air compressor is not shut down, the introduced air enters the breathing mask after being filtered by the existing filter medium, the air pressure sensing module at the breathing position (namely the breathing mask position) continuously detects the air pressure value (in the breathing mask) and sends the air pressure value to the control module, when the air pressure value is larger than the upper limit breathing threshold value, the control module controls the voltage of the air guide module to be reduced according to the rotating speed value so as to reduce the rotating speed of the air guide module, and when the air pressure value is smaller than the lower limit breathing threshold value, the control module controls the voltage of the air guide module to be increased so as to increase the rotating speed of the air guide module.
When the air quantity required by the medical staff A is large, the acceleration signal can be sent to the control module through the fully loaded acceleration module, the control module controls the air guide module to increase the rotating speed to the maximum value when receiving the acceleration signal, the requirement of the medical staff A is met, meanwhile, the control module controls the alarm module to conduct pressurization alarm, the control module continuously judges the electric quantity, the service life, the speed value and the air pressure value when not receiving the acceleration signal, and corresponding alarm is conducted when the control module is abnormal.
When medical staff use up once and use again after handling through disinfection or other modes, send the turn-on signal to control module again through the switch unit, control module keeps wind guide module in the stall state according to the state of having used, and equipment such as respirator can only be used once, prevents the cross infection that the used repeatedly caused, prevents the problem that the protection security that the used repeatedly caused reduces.
This embodiment constitutes the power module who corresponds through multisection dry battery and supplies power, the power cost is little, and need not external wire and supply power, the medical staff's of being convenient for use, let medical staff's home range in the use not receive the restriction of wire, because equipment also has certain power consumptive condition to produce before the use in placing the process, automated inspection power module's electric quantity and life before the use, make things convenient for medical staff to know the electric quantity problem in advance, in order to use continuously, change wind guide module's rotational speed value according to atmospheric pressure value in the use, let the user can breathe the air sustainably, reduce the uncomfortable sense of user use breathing machine in-process.
Example two
The difference with the first embodiment is that the alarm module comprises a plurality of LED indicating lamps with different colors, the LED indicating lamps alarm different abnormal conditions, and the LED indicating lamps with different colors are convenient for distinguishing different abnormal condition alarms.
EXAMPLE III
The difference from the first embodiment is that the control module adds the acquired time node when acquiring the air pressure value, for example, adds the time node T1 at the moment to the air pressure value at the time T1, the control module subtracts the air pressure value acquired at the timing long time period after acquiring the speed increase signal to obtain the air pressure difference, for example, adds the time node T1+5 to the air pressure value after the time period of the fixed time of five minutes after the time T1, the control module obtains the air pressure difference by subtracting the air pressure values of T1 and T1+5, the control module judges the air pressure difference after acquiring the speed increase signal, the control module compares the air pressure difference with the difference threshold, and when the air pressure difference is smaller than the difference threshold, the control module controls the lower-limit respiration threshold to be increased, for example, 4CFM of the lower-limit respiration threshold is increased to 6 CFM.
Because the breathing mask is under different elasticity degrees, the required minimum ventilation volume of regulation is different in the design standard of breathing mask, so detect the atmospheric pressure value through when pressurizeing and judge the elasticity degree of breathing mask, then control module automatic change lower limit breathing threshold value improves the accuracy of air pressure control in the breathing mask, avoids carrying out air guide module rotational speed with the same lower limit breathing threshold value under the different user state of breathing mask and adjusts and cause breathing unsmooely.
Example four
The difference with the first embodiment is that a controlled valve is arranged on the air duct between the respirator and the breathing mask, the controlled valve is arranged at the joint of the air duct and the breathing mask, the control module controls and is connected with the controlled valve, the control module controls the controlled valve to be intermittently opened and closed, and the controlled valve can be directly selected from the existing electronic air valve with a smaller size; when the device is initially used, the control module controls the air guide module to reduce the rotating speed after a preset time length; the air pressure sensing module comprises a first air pressure sensor and a second air pressure sensor, the first air pressure sensor is arranged in the area between the breathing mask and the mouth and nose of the user, and the second air pressure sensor is arranged on the side face of the breathing mask, such as the side face of the breathing mask opposite to the face or temples of the user; the control module acquires a front air pressure value of the first air pressure sensor, acquires a side air pressure value of the second air pressure sensor, subtracts the side air pressure value from the front air pressure value to obtain a difference value, and judges whether the difference value is a positive value or a negative value; when the difference value is a positive value, the first air pressure sensor detects the air pressure value in the exhalation process, and the control module controls the controlled valve to be opened at the next moment; when the difference value is a negative value, the air pressure value detected by the first air pressure sensor is the air pressure value in the inspiration, and the control module controls the controlled valve to close at the next moment.
When a user uses the breathing mask for protection, the user feels comfortable by introducing filtered air into the breathing mask in the inspiration process, the user easily blocks the exhaust of exhaled air by introducing the filtered air into the breathing mask in the expiration process, and the user needs to inhale the exhaled air into the body again, so that the experience and comfort of the user on the breathing mask are influenced; in the fourth embodiment, the front air pressure value facing the mouth and nose of the user in the breathing mask and the side air pressure value far away from the mouth and nose of the user are detected, the difference value is judged to be a positive value or a negative value by subtracting the air pressure values at the two positions, the air pressure at the mouth and nose in the breathing mask rises during exhalation, at the moment, the front air pressure value is slightly larger than the side air pressure value, so that the difference value is a positive value, and the controlled valve is controlled to be opened to provide air for the user to inhale when the user next moment of exhalation is the inhalation of the user; the atmospheric pressure of the interior oronasal department of respirator can reduce when breathing in, and at this moment, positive atmospheric pressure value can be less than side atmospheric pressure value slightly and make the difference be the negative value, and when the next moment of breathing in promptly the user exhales, the controlled valve of control is closed, avoids leading-in air to hinder exhaled gas and distributes away from respirator, improves the travelling comfort that the user used respirator.
Furthermore, the fourth embodiment controls the controlled valve to close at the interval between the exhalation and the inhalation of the user, so that a certain amount of air can be accumulated at the air duct, and more air can be intensively provided when the controlled valve is opened during the inhalation, so that the inhalation of the user is smoother, and the comfort of the user is improved; in addition, the air guide module can be controlled to reduce the rotating speed in the process of intermittently controlling the controlled valve to be opened or closed, so that the power consumption of the air guide module is saved; furthermore, after the rotating speed of the air guide module is reduced, dust or other substances carried in the air can be reduced, and therefore attachments at the air inlet of the respirator are reduced.
EXAMPLE five
The difference with the fourth embodiment is that only one air pressure sensing module is used, the control module obtains the periodic change of the air pressure value acquired by the air pressure sensing module in the preset time length as the breathing frequency, the preset time length can be set to be one minute, the air pressure value during expiration is higher than the air pressure value during inspiration, the control module controls the controlled valve to be opened periodically according to the breathing frequency to adapt to inspiration of a user, namely the controlled valve is controlled to be opened when the air pressure value is lower, and the control module controls the controlled valve to be closed periodically according to the breathing frequency to adapt to expiration of the user, namely the controlled valve is controlled to be closed when the air pressure value is higher; initially, opening the controlled valve within a first preset time, acquiring the current respiratory frequency by the control module, and then periodically opening and closing the controlled valve within the next preset time according to the respiratory frequency, wherein if the controlled valve is always opened for air supply within the first initial minute, the control module records the respiratory frequency of a user within the first minute; and controlling the controlled valve to be opened or closed according to the respiratory frequency of the first minute in the second minute, recording the respiratory frequency of the user in the second minute by the control module for the third minute, and so on, wherein the respiratory frequency of the previous preset time period controls the air supply frequency of the controlled valve in the next preset time period.
According to the breathing frequency control air supply frequency of the user, the user breathes more smoothly, the comfort of the user is improved, the power consumption of the air guide module is saved, and dust or other substances carried in the air can be reduced after the rotating speed of the air guide module is reduced, so that attachments at the air inlet of the respirator are reduced.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (6)
1. Disposable filtration breathing machine's control system, its characterized in that: the air guide module is used for introducing air to a breathing mask of a disposable air respirator at one time, the disposable air introduction means that the air respirator is not used again after being used for one time, the speed measurement module is used for measuring a rotating speed value when the air guide module introduces air, the air pressure sensing module is used for continuously detecting the air pressure value in the breathing mask after the air guide module introduces air, the control module obtains the air pressure value and the rotating speed value, the control module controls the rotating speed of the air guide module to be increased or reduced according to the air pressure value and the rotating speed value, and the power supply module supplies power to the air guide module, the speed measurement module, the air pressure sensing module and the control module;
the wind guide device also comprises a full-load acceleration module, the full-load acceleration module inputs an acceleration signal to the control module, the control module controls the wind guide module to increase the rotating speed according to the acceleration signal, the control module acquires the electric quantity of the power supply module, the service life of the power supply module, the air pressure value and the rotating speed value before acquiring the speed increasing signal for judgment, the control module controls the air guide module to reduce the rotating speed when the air pressure value is greater than the upper limit breathing threshold value, controls the air guide module to increase the rotating speed when the air pressure value is less than the lower limit breathing threshold value, the control module adds the acquired time node when acquiring the air pressure value, the control module acquires the acceleration signal and then subtracts the air pressure value acquired at a fixed time for a long time period to obtain the air pressure difference, the control module compares the air pressure differential amount with a difference threshold, and the control module increases a lower limit respiration threshold when the air pressure differential amount is less than the difference threshold;
the power supply module comprises a switch unit, the switch unit sends a continuous signal to the control module to serve as a shutdown signal or a pulse signal to serve as a startup signal, the control module records a used state after acquiring the startup signal for the first time, the control module keeps a rotation stopping state of the air guide module after acquiring the startup signal again, a controlled valve is arranged on an air guide pipe between the respirator and the respirator, the controlled valve is arranged at the joint of the air guide pipe and the respirator, the control module is in control connection with the controlled valve, and the control module controls the controlled valve to be opened and closed intermittently; the air pressure sensing module comprises a first air pressure sensor and a second air pressure sensor, the first air pressure sensor is arranged in the breathing mask and is opposite to the area between the mouth and the nose of a user, the second air pressure sensor is arranged at the side in the breathing mask, the control module acquires the front air pressure value of the first air pressure sensor, the control module acquires the side air pressure value of the second air pressure sensor, the control module subtracts the side air pressure value from the front air pressure value to obtain a difference value, and the control module judges whether the difference value is a positive value or a negative value; when the difference value is a positive value, the control module controls the controlled valve to be opened at the next moment; when the difference is negative, the control module controls the controlled valve to close at a next time.
2. The control system of a disposable air filtration ventilator as recited in claim 1, further comprising: the power supply module is characterized by further comprising a detection module, and the detection module detects the electric quantity and the service life of the power supply module.
3. The control system of a disposable air filtration ventilator as recited in claim 2, further comprising: the electric quantity alarm system is characterized by further comprising an alarm module, the control module acquires electric quantity and service life, the control module controls the alarm module to alarm the electric quantity when the electric quantity is smaller than a residual threshold value, and the control module controls the alarm module to alarm the service life when the service life is smaller than a service life threshold value.
4. The control system of a disposable air filtration ventilator of claim 3 wherein: and the control module controls the alarm module to alarm when the rotating speed value is smaller than the speed threshold value.
5. The control system of a disposable air filtration ventilator of claim 4 wherein: the control module controls the air guide module to stop rotating after acquiring the shutdown signal, controls the air guide module to start rotating after acquiring the startup signal, and controls the alarm module to perform shutdown alarm after acquiring the shutdown signal.
6. The control system of a disposable air filtration ventilator as recited in claim 5, further comprising: the alarm module comprises a plurality of LED indicator lamps with different colors.
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| CN202010350567.7A CN111529980B (en) | 2020-04-28 | 2020-04-28 | Control system of disposable air filtering respirator |
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| CN202010350567.7A CN111529980B (en) | 2020-04-28 | 2020-04-28 | Control system of disposable air filtering respirator |
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| CN111529980B true CN111529980B (en) | 2022-03-01 |
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| US5701883A (en) * | 1996-09-03 | 1997-12-30 | Respironics, Inc. | Oxygen mixing in a blower-based ventilator |
| US8844527B2 (en) * | 2008-04-15 | 2014-09-30 | Resmed Limited | Methods, systems and apparatus for paced breathing |
| GB2472592A (en) * | 2009-08-11 | 2011-02-16 | 3M Innovative Properties Co | A control unit for respirator |
| CN101822877B (en) * | 2010-06-01 | 2012-06-13 | 中国人民解放军军事医学科学院卫生装备研究所 | Dynamic air supply system and control system thereof |
| CN203898977U (en) * | 2014-04-15 | 2014-10-29 | 中国人民解放军军事医学科学院卫生装备研究所 | Integral waterproof power air supply system with low-air-volume alarming function |
| ITUB201594612U1 (en) * | 2015-11-17 | 2017-05-17 | Spasciani S P A | PERSONAL PROTECTIVE EQUIPMENT FOR RESPIRATORY TRACKS PROVIDED WITH ALARM SYSTEM. |
| CN106139349A (en) * | 2016-08-03 | 2016-11-23 | 深圳市安保科技有限公司 | The vent method of a kind of breathing apparatus and device |
| CN106975135B (en) * | 2017-04-11 | 2019-09-27 | 湖南明康中锦医疗科技发展有限公司 | Method and device for air leakage compensation of respirator and noninvasive respirator |
| CN109771765A (en) * | 2018-12-29 | 2019-05-21 | 湖南明康中锦医疗科技发展有限公司 | A kind of control method and device and system of Breathing Suppotion equipment gas flow |
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