CN115228000A - Medical power air supply mask - Google Patents
Medical power air supply mask Download PDFInfo
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- CN115228000A CN115228000A CN202210856302.3A CN202210856302A CN115228000A CN 115228000 A CN115228000 A CN 115228000A CN 202210856302 A CN202210856302 A CN 202210856302A CN 115228000 A CN115228000 A CN 115228000A
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- 238000001914 filtration Methods 0.000 claims abstract description 106
- 238000007664 blowing Methods 0.000 claims abstract description 22
- 238000005192 partition Methods 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims description 12
- 230000001815 facial effect Effects 0.000 claims description 8
- 210000001061 forehead Anatomy 0.000 claims description 8
- 230000029058 respiratory gaseous exchange Effects 0.000 abstract description 7
- 239000003570 air Substances 0.000 description 284
- 238000012360 testing method Methods 0.000 description 12
- 230000001276 controlling effect Effects 0.000 description 7
- 230000008676 import Effects 0.000 description 7
- 230000008859 change Effects 0.000 description 5
- 239000003086 colorant Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 4
- 210000003128 head Anatomy 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000000241 respiratory effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 206010021143 Hypoxia Diseases 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 206010040007 Sense of oppression Diseases 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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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
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
- A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
- A41D13/11—Protective face masks, e.g. for surgical use, or for use in foul atmospheres
-
- 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
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B23/00—Filters for breathing-protection purposes
- A62B23/02—Filters for breathing-protection purposes for respirators
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Pulmonology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Zoology (AREA)
- Physical Education & Sports Medicine (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
The invention provides a medical power air supply mask which comprises a mask body, an air supply system and a control system, wherein the mask body is provided with a containing cavity; the first air filtering device is arranged between the air inlet of the mask and the inlet of the fan; the face air blowing port is arranged on the side wall of the accommodating cavity and is communicated with an outlet of the fan; the inlet and the outlet of the fan are isolated by arranging a partition plate and/or by closely connecting the outlet of the fan with a face blowing port. The control system comprises a controller and a pressure sensor, and the controller adjusts the rotating speed of the fan according to the air outlet pressure signal of the fan. The air supply mask has the advantages of simple structure, convenience in wearing, safety, reliability, capability of automatically adjusting the rotating speed of the fan, keeping stable air output, meeting the breathing requirement of a wearer, sending alarm prompt, reserving sufficient replacement time for the wearer and improving safety.
Description
Technical Field
The invention relates to the technical field of protective articles, in particular to a medical power air supply mask.
Background
At present, protective articles commonly used in hospitals are worn by combining a face screen (goggles) and a mask, and meanwhile, the face and breath protection is provided; wear the complicacy on the whole, the gauze mask is worn the leakproofness and is relatively poor not enough to the protection of virus, wears back and produces great influence to medical personnel health and psychology to facial oppression, mugginess, has also reduced work efficiency and quality simultaneously. A few hospitals also use industrial power air supply equipment, but the whole body is heavy, a pipeline hood and the like limit the flexibility of medical personnel, and the influence on the working efficiency is large.
Disclosure of Invention
In order to solve the technical problem, the invention provides a medical power air supply mask which is provided with an air supply system, can supply air to the face, can automatically adjust the rotating speed of a fan according to the air outlet pressure of the fan and meets the air supply quantity requirement.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a medical power air supply mask comprises a mask body, an air supply system and a control system, wherein a containing cavity is arranged on the mask body;
the air supply system comprises a mask air inlet, a first air filtering device, a fan and a face air blowing port; the first air filtering device is arranged between the air inlet of the mask and the inlet of the fan; the face air blowing port is arranged on the side wall of the accommodating cavity and is communicated with an outlet of the fan; the accommodating cavity is provided with an opening facing the first air filtering device, the accommodating cavity is provided with a partition board, the partition board is tightly sealed with the opening of the accommodating cavity, the fan is arranged on the partition board, the inlet of the fan faces the outer side of the accommodating cavity, and the outlet of the fan faces the inner side of the accommodating cavity; and/or the fan is arranged in the accommodating cavity, and the outlet of the fan is closely connected with the face blowing port to isolate the air inlet and the air outlet of the fan;
the control system is arranged on the mask body and comprises a controller and a pressure sensor, the pressure sensor is used for detecting the air outlet pressure of the fan and sending the collected pressure signal to the controller, and the controller adjusts the rotating speed of the fan according to the air outlet pressure signal of the fan.
Furthermore, the accommodating cavity is arranged at the forehead part of the mask body, so that the volume of the accommodating cavity is increased; the first air filtering device covers the outer side of the partition plate and at least covers the inlet of the fan; the outer side of the first air filtering device is provided with a front cover, and the air inlet of the mask is formed in the front cover.
Further, the fans are two centrifugal fans; the air inlet of the mask is arranged at the bottom of the front cover; the face air blowing port is arranged at the bottom of the accommodating cavity, and can change the flow direction of air, so that the air flows in an n-shaped manner and is blown to the face from the forehead.
Furthermore, the baffle is a shell at the inlet side of the fan, so that the structure of the air supply mask is simplified.
Furthermore, an air outlet is formed in the bottom of the mask body, the air outlet is provided with an openable valve cover, and a detachable second air filtering device is arranged on the inner side of the valve cover and can be replaced.
Further, the control system further comprises an indicating device, the indicating device comprises an indicating lamp and/or a buzzer, and the indicating lamp comprises a first air filtering device indicating lamp and/or a flow rate indicating lamp.
Furthermore, the control system also comprises a battery and a control button, wherein the control button is used for turning on and off the fan and controlling the gear of the fan; the indicator light also comprises an electric quantity indicator light.
Further, the method for controlling the flow indicator lamp to display the indication signal by the controller comprises the following steps:
s1, setting a low-pressure alarm threshold value P' according to a standard air outlet pressure P0;
s2, reading an actual air outlet pressure P and a gear signal of an air outlet of the fan by the controller, and obtaining a low-pressure alarm threshold value P' according to the gear signal;
s3, the controller compares the actual air outlet pressure P with a low-pressure alarm threshold value P':
when P is larger than or equal to P', the flow indicator lamp displays a first flow indicator;
when P is less than P', the controller controls the indicating device to send out a low-flow alarm signal: the flow indicator light displays a second flow indication; or the flow indicator lamp displays the second flow indication, and the buzzer gives out buzzing alarm.
Further, the low pressure warning threshold P' is set to 60% P0; preferably, the low pressure warning threshold P' is set to 70%; preferably, the low pressure warning threshold P' is set to 80%.
Further, the controller controls the fan to adjust the rotating speed, so that the air outlet pressure of the fan is in a set range, and the specific method comprises the following steps:
s1, setting a lower air outlet pressure limit Pmin and an upper air outlet pressure limit Pmax according to a standard air outlet pressure P0;
s2, reading an actual air outlet pressure P and a gear signal of an air outlet of the fan by the controller, and obtaining an air outlet pressure lower limit Pmin and an air outlet pressure upper limit Pmax according to the gear signal;
s3, the controller compares the actual air outlet pressure P with the lower air outlet pressure limit Pmin and the upper air outlet pressure limit Pmax:
when P is less than Pmin or P is more than Pmax, the controller controls the fan to adjust the rotating speed according to the increment delta N, so that P is less than or equal to Pmin and less than or equal to Pmax.
Further, the lower outlet air pressure limit Pmin and the upper outlet air pressure limit Pmax are set to 90% and 110% respectively by the percentage p0 and p0; preferably, the lower outlet pressure limit Pmin and the upper outlet pressure limit Pmax are set to 95% p0 and 105% respectively; preferably, the lower outlet pressure limit Pmin and the upper outlet pressure limit Pmax are set to 98% p0 and 102% respectively, p0.
Further, when the rotating speed of the fan is increased according to the increment delta N, and the controller detects that the rotating speed N of the fan to be adjusted is larger than the maximum rotating speed Nmax of the fan, the fan operates according to the maximum rotating speed Nmax, and the controller controls the indicating device to send out a service life alarm signal of the first air filtering device.
Furthermore, the increment delta N is 50-200r/min.
Further, when P is less than Pmin, the actual outlet air pressure P is compared with a low-pressure alarm threshold P ', or before the actual outlet air pressure P is compared with a lower outlet air pressure limit Pmin, the actual outlet air pressure P is compared with the low-pressure alarm threshold P ', when P is less than Pmin and P is greater than or equal to P ', the controller controls the fan to adjust the rotating speed according to the increment delta N, and the Pmin is less than or equal to P and less than or equal to Pmax; when P is less than P', the controller controls the indicating device to send out a low-flow alarm signal.
Further, the method for controlling the indicator light of the first air filtering device to display the indicator signal by the controller comprises the following steps:
s1, a controller reads a gear signal to obtain corresponding fan rotating speeds N1 and N2 when used time T is 1/2 and 3/4 of available time T of a first air filtering device under a corresponding gear of the first air filtering device respectively; preferably, under the corresponding gear of the first air filtering device, the used time T is 1/3 and 2/3 of the available time T of the first air filtering device, and the corresponding fan rotating speeds N1 and N2 are obtained respectively;
s2, the controller reads the current rotating speed N0 of the fan, and the N0 is compared with the N1 and the N2:
when N0< N1, the first air filtration device indicator light displays a first filtration indication;
when N1 is more than or equal to N0 and less than N2, the first air filtering device indicator lamp displays a second filtering indication;
when N0 is larger than or equal to N2, the controller controls the indicating device to send out a service life alarm signal of the first air filtering device: the first air filtration device indicator light displays a third filtration indication; or the first air filtering device indicator lamp displays a third filtering indication, and the buzzer gives out a buzzing alarm.
Further, the method for controlling the electric quantity indicator lamp to display the indication signal by the controller comprises the following steps:
when the residual electric quantity of the battery is greater than or equal to 2/3 of the full electric quantity of the battery, the electric quantity indicator lamp displays a first electric quantity indicator;
when the residual electric quantity of the battery is less than 2/3 of the full electric quantity of the battery and is more than or equal to 1/3 of the full electric quantity of the battery, the electric quantity indicator lamp displays a second electric quantity indication;
when the residual capacity of the battery is less than 1/3 of the full capacity of the battery, the controller controls the indicating device to send out a low-capacity alarm signal: the electric quantity indicator lamp displays a third electric quantity indication; or the electric quantity indicating lamp displays a third electric quantity indication, and the buzzer gives out buzzing alarm.
Compared with the prior art, the invention has the beneficial effects that:
(1) The air supply mask is simple in structure, convenient to wear, safe and reliable, and the wearing person can move freely without limiting the moving range of the wearing person.
(2) Along with the increase of first air filter equipment filtration resistance, this air supply mask can automatically regulated fan rotational speed, keeps steady air output, satisfies the personnel's of wearing breathing demand.
(3) This air supply face guard is provided with indicating device, can remind first air filter's state, flow state and battery power state to wearing personnel, leaves sufficient change time for wearing personnel, improves security and travelling comfort.
Drawings
Fig. 1 is a schematic structural view of the medical powered air supply mask of the invention.
Fig. 2 is an exploded view of the medical powered air delivery mask of the present invention.
FIG. 3 is a logical schematic of the fan speed adjustment for the medical powered blower mask of the present invention.
FIG. 4 is another logic diagram of fan speed regulation for a medical powered blower mask of the present invention.
Fig. 5 is a graph illustrating the relationship between the service time t and the fan speed N of the first air filter device according to the present invention.
In the figure: 1-a mask body; 11-a fixed frame; 12-face screen; 13-face seal; 14-gas outlet; 141-a valve cover; 142-a second air filtration device; 15-a headband; 151-fastening; 2-a containing cavity; 3-a mask air inlet; 4-a first air filtration device; 5, a fan; 501-a partition board; 6-face air blowing port; 7-a pressure sensor; 8-front cover; 9-indicating means.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and examples.
It should be noted that, in the following description of the technical solutions of the present invention, the terms "upper", "lower", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only used for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be constructed in specific orientations, and operate, and thus, should not be construed as limiting the present invention.
In addition, it should be noted that the terms "inside" and "inner" refer to a position close to the face or a side facing the face, and "outside" and "outer" refer to a position away from the face or a side facing away from the face.
The invention provides a medical power air supply mask which is shown by combining a figure 1 and a figure 2 and comprises a mask body 1, an air supply system and a control system. The mask body 1 is provided with an accommodating cavity 2; the air supply system comprises a mask air inlet 3, a first air filtering device 4, a fan 5 and a face air blowing opening 6; the first air filtering device 4 is arranged between the air inlet 3 of the face mask and the inlet of the fan 5 and is used for filtering ambient air; the face air blowing port 6 is arranged on the side wall of the accommodating cavity 2, is communicated with an outlet of the fan 5 and supplies air to the face; the accommodating cavity 2 is provided with an opening facing the first air filtering device 4, the accommodating cavity 2 is provided with a partition plate 501, the partition plate 501 is tightly sealed with the opening of the accommodating cavity 2, the fan 5 is arranged on the partition plate 501, the inlet of the fan 5 faces the outer side of the accommodating cavity 2, and the outlet of the fan 5 faces the inner side of the accommodating cavity 2; and/or the fan 5 is arranged in the accommodating cavity 2, and an outlet of the fan 5 is closely connected with the face blowing port 6. The inlet and the outlet of the fan 5 are isolated by using the partition plate 501 to closely fit the opening of the accommodating chamber 2 or connecting the face blowing port 6 through the outlet of the fan 5, so that the air at the inlet and the air at the outlet of the fan 5 are prevented from mixing. Control system sets up on face guard body 1, including control panel and pressure sensor 7, pressure sensor 7 can set up in facial mouth 6 departments of blowing or set up in the exit of fan 5 for detect fan 5's air-out pressure, and send the control panel with the pressure signal who gathers, the control panel is according to fan 5's air-out pressure signal, adjusts fan 5's rotational speed to the settlement scope.
The mask body 1 is a mask body 1 which is generally used and comprises a face screen 12, a fixing frame 11, a face sealing strip 13, an air outlet 14 and a head band 15. The face screen 12 is embedded in the fixed frame 11, preferably, the face screen 12 is detachably connected to the fixed frame 11, clamping grooves can be formed in the periphery of the fixed frame 11, and the face screen 12 is inserted into the clamping grooves through plastic part pressing strips. The face seal 13 is provided on the surface of the fixed frame 11 that is joined to the face, and may be provided integrally with the fixed frame 11, as a part of the fixed frame 11, or may be provided detachably with the fixed frame 11. The headband 15 is an elastic headband 15, preferably, comprises an upper headband 15 and a lower headband 15, and both ends of the upper headband 15 and the lower headband 15 are fixed on the left and right sides of the upper part and the lower part of the fixing frame 11 respectively through buckles 151. During the use, face guard body 1 covers at whole face, adjusts bandeau 15, through the faying surface of sealing strip driving fit face guard body 1 and face, keeps apart face and all around mirror, protects face.
Preferably, the accommodating cavity 2 is arranged at the forehead part of the mask body 1, so that the volume of the accommodating cavity 2 can be increased. Baffle 501 can be the baffle 501 that sets up alone, the baffle 501 driving fit holds the opening of chamber 2, can set up the through-hole on the baffle 501, inlays fan 5 in through-hole department, makes fan 5's import towards the baffle 501 outside, holds the chamber 2 outside towards promptly, and fan 5's export orientation holds the chamber 2 inboard. The partition plate 501 may be provided with a vent hole, and the fan 5 may be mounted on the partition plate 501 so as to close the inlet of the fan 5 to the vent hole and seal the connection between the inlet of the fan 5 and the vent hole. Like this, keep apart the import department air of fan 5 and the exit air of fan 5 through baffle 501, just can ensure that the air can only get into from the import of fan 5, flows into from the export of fan 5 and holds chamber 2, flows into mask body 1 from face mouth of blowing 6 again in, supplies wind for wearing personnel, makes wearing personnel breathe smoothly. Preferably, can regard the shell of fan 5 as baffle 501, simplify this air supply mask's structure, can set up the shell of the import side of fan 5 into with hold chamber 2 opening looks adaptation's shape and size, when installing fan 5, the shell of fan 5 can directly block in the opening part that holds chamber 2, the driving fit holds the opening of chamber 2, directly keeps apart the air in the import department of fan 5 and the exit air of fan 5 through the shell of fan 5. The forehead part of the mask body 1 is in a long strip shape, preferably, the number of the fans 5 is two, so that the volume of the fans 5 is reduced, and the air supply volume is increased. Two fans 5 can be installed in a shell side by side, also can set up the shell respectively, and the shell of two fans 5 is blocked jointly at the opening part that holds chamber 2, and the driving fit holds the opening of chamber 2. Also can directly cover facial mouth of blowing 6 with the export of fan 5, the export of sealed fan 5 and the connecting portion of facial mouth of blowing 6 make the export of fan 5 and the 6 driving fit of facial mouth of blowing connect, and the air is discharged facial mouth of blowing 6 and is supplied air for the personnel of wearing by fan 5 suction back direct through the export of fan 5, and can not discharge the air in holding chamber 2. Of course, the partition plate 501 may be provided to closely contact the opening of the housing chamber 2, and the outlet of the fan 5 may be closely connected to the face air outlet 6. Preferably, the fan 5 may be a centrifugal fan 5, and the mask air outlet is disposed at the bottom of the accommodating cavity 2, so that air is blown to the face from the forehead part, thereby improving the comfort of use.
First air filter equipment 4 sets up between the import of face guard air intake 3 and fan 5, and is preferred, first air filter equipment 4 covers the baffle 501 outside, covers the import of fan 5 at least, and when air was in by fan 5 suction mask body 1 like this, just can filter through first air filter equipment 4 earlier. When two fans 5 are arranged, the inlets of the two fans 5 need to be covered, preferably, the first air filtering device 4 covers the whole partition 501, and the air filtering device is simple in structure and convenient to install. The first air filtering device 4 can adopt melt-blown cloth, glass fiber, nano electrostatic textile filtering materials and the like, and can realize comprehensive filtering of particulate matters, germs, harmful gases and the like. The front cover 8 is arranged outside the first air filtering device 4, preferably, the first air filtering device 4 can be detached and replaced, and the front cover 8 can be detached for facilitating detachment and installation of the first air filtering device 4. The mask air inlet 3 is formed in the front cover 8, preferably, the mask air inlet 3 is formed in the bottom of the front cover 8, and when liquid splashes onto the mask body 1, the liquid can be prevented from entering the first air filtering device 4 along with air to pollute the first air filtering device 4.
When the mask is used, the mask body 1 is worn on the back of the head, the tightness of the head band 15 is adjusted, the mask covers the face, the fan 5 is powered on, air is sucked from the mask air inlet 3 at the bottom of the front cover 8 as shown by the arrow direction in fig. 1, the air is filtered by the first air filtering device 4 and then sucked into the fan 5, the direction of the air is changed and then is downwards discharged to the face air blowing port 6, so that the air flows in an n shape and is blown to the face from the forehead position to supply air to a wearer for breathing, and the interior of the mask is kept in a micro-positive pressure state with the external pressure difference of 50-500Pa, so that the safety of protection is further improved, and the use comfort is improved.
The bottom of the mask body 1 is provided with an air outlet 14 for discharging waste gas such as CO2 exhaled by a wearer, and simultaneously taking heat and water vapor in the mask out of the mask, so that the mask is always in a dry and comfortable environment. Preferably, the air outlet 14 has an openable valve cover 141, and a detachable second air filtering device 142 is disposed inside the valve cover 141. The second air filter device 142 can be made of non-woven fabrics such as SM and SMS, can prevent liquid outside the mask body 1 from splashing into and permeating into the mask body 1, and can prevent internal bacteria from breathing out, thereby achieving the bidirectional protection effect. When the second air filter device 142 is contaminated or used for a long time, the valve cover 141 may be opened to replace the second air filter device 142.
The control system further comprises an indicating device 9, wherein the indicating device 9 comprises an indicating lamp or a buzzer, or the indicating lamp and the buzzer can be arranged at the same time. First air filter 4 is when using, along with the increase of live time, the adsorbed particulate matter of first air filter 4 etc. comes more and more, blocks more and more seriously, consequently, can set up first air filter 4 pilot lamp and indicate first air filter 4's state, and report to the police when first air filter 4 life-span is about to expire and remind, set up the air supply volume condition that flow indicator light indicates the face guard, and the air supply volume is few in the face guard, the warning is reminded when air-out pressure is less. Fan 5 and control system need the power supply when using, in order to improve when using the air supply mask, the flexibility of wearing personnel's activity avoids the restriction to wear personnel's home range, control system still includes the battery, can supply power for fan 5 and control system's power consumption part through the battery. Preferably, the power source is a rechargeable lithium battery, and a charging port may be provided on the fixing frame 11. A storage chamber with a rear cover may be provided at the rear side of the forehead portion of the fixing frame 11, and the controller and the battery may be mounted in the storage chamber, thereby facilitating replacement and maintenance of the controller and the battery. And an electric quantity indicator lamp can be further arranged for prompting the condition of the electric quantity of the battery. In order to meet the requirements of various air supply quantities, the control system further comprises a control button, the control button is used for switching on and off, the gear of the fan 5 can be controlled, and the proper air supply quantity is selected by switching the gear.
The method for controlling the flow indicator lamp to display the indicating signal by the controller comprises the following steps:
s1, setting a low-pressure alarm threshold value P' according to a standard air outlet pressure P0;
s2, reading the actual air outlet pressure P and the gear signal of the air outlet of the fan 5 by the controller, and obtaining a low-pressure alarm threshold value P' according to the gear signal;
s3, the controller compares the actual air outlet pressure P with a low-pressure alarm threshold value P':
when P is larger than or equal to P', the flow indicator lamp displays a first flow indicator;
when P < P', the controller controls the indicating device 9 to send out a low-flow alarm signal: the flow indicator light displays a second flow indication; or the flow indicator lamp displays the second flow indication, and the buzzer gives out buzzing alarm.
In order to ensure the safety and the comfort of the wearer using the air supply mask, the control system is provided with a flow indicator lamp and a buzzer to prompt the air supply quantity condition of the mask, and specifically, the actual air outlet pressure P is compared with a low-pressure alarm threshold value P 'to judge the air supply quantity condition by setting a low-pressure alarm threshold value P'. The low pressure warning threshold P' may be set to 60% P0; preferably, the low pressure warning threshold P' may be set to 70%; preferably, the low pressure alarm threshold P 'may be set to 80% p0, but of course, depending on the requirements for safety, the low pressure alarm threshold P' may also be set to 50% p0, 55% p0, 65% p0, 75% p0, etc. When the air supply volume in the mask is sufficient, a wearer can breathe normally, namely P is larger than or equal to P', the flow indicator lamp displays a first flow indication, the first flow indication is a normal flow indication, and the flow indicator lamp can display colors such as green. When the abnormal conditions such as the air inlet 3 of the face mask is suddenly blocked, the first air filtering device 4 is covered or the ventilation channel is broken or flattened, the air supply volume in the face mask can be sharply reduced, the breathing air volume of a wearer is insufficient, and serious discomfort can be caused. The second flow rate indication may be set to display a different color of an indicator light from the first flow rate indication, for example, the indicator light may be made to display a red color, or the same color band of the indicator light may be flashed or a different color band of the indicator light may be flashed, for example, the indicator light may display a red color and may be flashed. When the flow indicator lamp sends a low-flow alarm signal, the wearer needs to stop using the air supply mask and replace the air supply mask with a new one. In order to be more easily noticed by a wearer when the alarm prompt is sent, the controller can control the buzzer to send out the buzzer alarm while the flow indicator lamp displays the second flow indication.
This air supply mask is when using, 5 automatically regulated rotational speeds of fan can be controlled to the controller, make 5's air-out pressure of fan keep invariable basically, even facial air supply volume keeps invariable basically, ensures the breathing demand of wearing personnel, and the concrete method is:
s1, setting an air outlet pressure lower limit Pmin and an air outlet pressure upper limit Pmax according to a standard air outlet pressure P0;
s2, reading an actual air outlet pressure P and a gear signal of an air outlet of the fan 5 by the controller, and obtaining an air outlet pressure lower limit Pmin and an air outlet pressure upper limit Pmax according to the gear signal;
s3, the controller compares the actual air outlet pressure P with an air outlet pressure lower limit Pmin and an air outlet pressure upper limit Pmax:
when P is less than Pmin or P is more than Pmax, the controller controls the fan 5 to adjust the rotating speed according to the increment delta N, and the Pmin is less than or equal to P and less than or equal to Pmax.
The controller stores standard air outlet pressure P0, and the P0 can be obtained according to the test calibration of GB30864-2014 respiratory protection power air supply filtering type respirator. The first air filtering device 4 is installed on the air supply face mask for testing, the air output Q is kept constant after ventilation, the air supply pressure of the face corresponding to the air output Q is measured, and the face air supply pressure is the standard air outlet pressure P0. Can set up air output Q to a plurality of gears, corresponding standard air-out pressure P0 that has under every gear, corresponding to each standard air-out pressure P0, this air supply mask's fan 5's gear also corresponding setting is to many grades. For example, the air output Q can be set to be a plurality of gears such as 120L/min, 150L/min, 170L/min and the like, the gears of the fan 5 of the air supply mask can be correspondingly set to be a plurality of gears such as first gear, second gear, third gear and the like, and the gears of the requirements can be adjusted through the control button. Of course, other air quantities can be set according to the requirements of the wearer, such as 100L/min, 130L/min, 180L/min and the like. Of course, one air volume may be set and one shift may be set. For example, when there are three gears, the signal for the first gear may be set to 00, the signal for the second gear may be set to 01, and the signal for the third gear may be set to 11, and stored in the controller. After the controller reads the gear signal, the standard outlet air pressure P0 can be obtained according to the gear signal, so as to obtain the lower outlet air pressure limit Pmin and the upper outlet air pressure limit Pmax. The lower outlet pressure limit Pmin and the upper outlet pressure limit Pmax may be set to 90% p0 and 110%, respectively, p0. In order to satisfy the accuracy requirement of the air supply of the fan 5, to make the outlet air pressure of the fan 5 more stable, and to enable the fan 5 to be adjusted to a required rotation speed as quickly as possible, to enhance the user experience, it is preferable that the outlet air pressure lower limit Pmin and the outlet air pressure upper limit Pmax be set to 95%P0 and 105%; preferably, the lower outlet pressure limit Pmin and the upper outlet pressure limit Pmax may be set to 98% p0 and 102% respectively. Of course, the lower outlet pressure limit Pmin may be set to 85% p0, 88% p0, 92% p0, 96% p0, etc., the upper outlet pressure limit Pmax may be set to 101% p0, 104% p0, 106% p0, 115% p0, etc., the lower outlet pressure limit Pmin and the upper outlet pressure limit Pmax may be combined with each other, and thus, description thereof is omitted, as long as the wearer can be ensured to breathe smoothly and comfortably. Preferably, in order to enable the fan 5 to rapidly adjust the rotating speed, pmin is less than or equal to P less than or equal to Pmax in a short time, and the increment delta N can be set to be 50-200r/min.
When the air supply mask is used, a wearer can select a gear according to the requirement of the wearer, and after the controller reads a gear signal, the standard air outlet pressure P0 under the gear can be obtained, so that a low-pressure alarm threshold value P', an air outlet pressure lower limit Pmin and an air outlet pressure upper limit Pmax are obtained. After the wearer selects a gear, the amount of air delivered to the face needs to be kept substantially constant at that gear. When the difference between the air outlet pressure P and the standard air outlet pressure P0 is large, the controller can automatically control the fan 5 to adjust the rotating speed, and the air outlet pressure of the fan 5 is kept constant. As shown in fig. 3 and 4, when the pressure sensor 7 detects that the actual outlet air pressure P is less than the lower outlet air pressure limit Pmin, the controller calculates the rotation speed N required to be adjusted after increasing the rotation speed by the increment Δ N, when N is less than or equal to the maximum rotation speed Nmax of the fan 5, the controller controls the fan 5 to increase the rotation speed by the increment Δ N, the pressure sensor 7 continuously detects the actual outlet air pressure P of the fan 5, and when P is still less than Pmin after adjusting the rotation speed of the primary fan 5, the fan 5 continuously increases the rotation speed by the increment Δ N until the actual outlet air pressure P is between the lower outlet air pressure limit Pmin and the upper limit Pmax, that is, pmin is less than or equal to P and less than or equal to Pmax. Similarly, when the pressure sensor 7 detects that the actual air outlet pressure P is greater than the upper limit Pmax of the air outlet pressure, the controller controls the fan 5 to reduce the rotating speed according to the increment delta N until Pmin is less than or equal to P and less than or equal to Pmax. When the pressure sensor 7 detects that the actual air outlet pressure P is greater than or equal to the lower air outlet pressure limit Pmin and less than or equal to the upper air outlet pressure limit Pmax, the current rotation speed N0 of the fan 5 is kept in operation. Taking the case that the lower outlet pressure limit Pmin and the upper outlet pressure limit Pmax are 95% P0 and 105% P0, respectively, and the increment Δ N when the fan 5 adjusts the rotational speed is 50r/min, when P < 95% P0 or P > 105% P0, the controller controls the fan 5 to raise or lower the current rotational speed N0 to N, N = N0 + -50 at 50r/min, until 95% P0. Ltoreq.P.ltoreq.105 P0 after the fan 5 adjusts the rotational speed one or more times. When 95 ≦ P0 ≦ P ≦ 105%.
When the rotating speed of the fan 5 is increased according to the increment delta N, the controller calculates that the rotating speed N of the fan 5 needing to be adjusted is larger than the maximum rotating speed Nmax of the fan 5, the fan 5 operates according to the maximum rotating speed Nmax, and the controller controls the indicating device 9 to send out a service life alarm signal of the first air filtering device 4.
As shown in fig. 3, when the pressure sensor 7 detects that the actual outlet air pressure P is less than the lower outlet air pressure limit Pmin, the actual outlet air pressure P needs to be compared with the low-pressure alarm threshold P'. When P is less than P', the air supply amount is not satisfied with the requirements of the wearing person, the breathing of the wearing person is not smooth, oxygen deficiency and the like can be caused, and at the moment, the controller controls the indicating device 9 to send out a low-flow alarm signal. When P is less than Pmin and P is more than or equal to P', the controller controls the fan 5 to adjust the rotating speed according to the increment delta N, so that P is less than or equal to Pmin and less than or equal to Pmax. Of course, as shown in fig. 4, before comparing the actual outlet air pressure P with the lower outlet air pressure limit Pmin, the actual outlet air pressure P may be compared with a low-pressure alarm threshold P ', and when P is less than P', the controller controls the indicating device 9 to send out a low-flow alarm signal, so that the rotation speed of the fan 5 does not need to be adjusted. When P is more than or equal to P', the actual outlet air pressure P is compared with the lower outlet air pressure limit Pmin.
Preferably, in order to eliminate accidental influence and avoid error adjustment, the controller controls the indicating device 9 to send out a low-flow alarm signal when the pressure sensor 7 continuously detects that P is less than P' for 3-5 times. And when the pressure sensor 7 continuously detects that P' is more than or equal to P < Pmin or P is more than Pmax for 3-5 times, the controller controls the fan 5 to adjust the rotating speed according to the increment delta N. Preferably, the pressure sensor 7 with temperature correction may be adopted as the pressure sensor 7, and the outlet air pressure P of the fan 5 detected by the pressure sensor 7 is corrected, so that an error caused by temperature change is eliminated, and the measurement accuracy is improved.
The method for controlling the indicator lamp of the first air filtering device 4 to display the indicator signal by the controller comprises the following steps:
s1, a controller reads a gear signal to obtain corresponding rotating speeds N1 and N2 of a fan 5 when used time T is 1/3 and 2/3 of available time T of a first air filtering device 4 under a corresponding gear of the first air filtering device 4; or acquiring the rotating speeds N1 and N2 of the fan 5 respectively corresponding to the time T used by the first air filtering device 4 which is 1/2 and 3/4 of the time T used by the first air filtering device 4 under the corresponding gear of the first air filtering device 4;
s2, the controller reads the current rotating speed N0 of the fan 5, and compares the N0 with the N1 and the N2:
when N0< N1, the first air filtration device 4 indicator light displays a first filtration indication;
when N1 is more than or equal to N0 and less than N2, the first air filtering device 4 indicator lamp displays a second filtering indication;
when N0 is more than or equal to N2, the controller controls the indicating device 9 to send out a service life alarm signal of the first air filtering device 4: the first air filtration device 4 indicator light displays a third filtration indication; or the indicator light of the first air filtering device 4 displays the third filtering indication, and the buzzer gives out a buzzing alarm.
As shown in fig. 5, the maximum rotation speed Nmax, the rotation speeds N1 and N2 of the fan 5 can be obtained according to the test calibration of the standard GB30864-2014 respiratory protection powered air-supply filtering respirator. First, a new first air filtering device 4 is tested under the air output Q0, when the pressure difference between two sides of the first air filtering device 4 reaches delta P, the test is stopped, the first air filtering device 4 reaches the end of service life and can not play an effective filtering role, and the time T0 for using the first air filtering device 4 at the moment is recorded. Preferably, the air output Q0 can be set to 80L/min, and Δ P can be set to 500Pa. And then, the first air filter device 4 with the end of life is installed on an air supply face cover for testing, the same air output Q is kept after ventilation as that when the standard air output pressure P0 under the same gear is obtained, for example, the air output Q is set to be 120L/min, and the rotating speed of the fan 5 when the air output is kept is recorded, namely the maximum rotating speed Nmax of the fan 5. The supply mask with the new first air filter unit 4 is then tested and the same air output Q is maintained after ventilation until the end of the life of the first air filter unit 4. In the test process, the resistance of the first air filter device 4 gradually increases along with the use of the first air filter device 4, and in order to keep the air output Q constant, the rotating speed of the fan 5 needs to be adjusted until the maximum rotating speed Nmax of the fan 5 is reached, and the test is finished. In the test process, a relation curve of the test time T and the rotating speed N of the fan 5 is recorded, the time T which can be used by the first air filtering device 4 from the beginning of the test to the end of the test is recorded, and the rotating speed N of the fan 5 corresponding to the time T when the used time of the first air filtering device 4 reaches T is found out. Preferably, the time T that the first air filter device 4 can be used is divided into three equal parts, and the rotational speeds N1 and N2 of the fan 5 that have been used are recorded at 1/3 and 2/3 of the time T that the first air filter device 4 can be used, respectively. Preferably, the time T that the first air filter device 4 can be used is also divided into four equal parts, and the rotational speeds N1 and N2 of the fan 5 that have been used for 1/2 and 3/4 of the time T that the first air filter device 4 can be used are recorded. Optionally, a new first air filter device 4 may be tested at the air output Q0, the test is stopped when the usage time T reaches 1/3 and 2/3 of T0, the first air filter devices 4 in the two states are mounted on the air supply face mask to be tested, the air supply amount is kept to be Q, the rotation speed of the fan 5 at the time is recorded, and the rotation speed at the time is the rotation speed N1 of the fan 5 corresponding to the time T that has been used being 1/3 of the time T that can be used by the first air filter device 4, and the rotation speed N2 of the fan 5 corresponding to the time T that has been used being 2/3 of the time T that can be used by the first air filter device 4.
Nmax, N1 and N2 obtained by experimental calibration are stored in the controller, and after the controller reads the gear signal, nmax, N1 and N2 corresponding to the gear can be obtained. By comparing the current rotational speed N0 with N1 and N2, respectively, the section in which the state of the first air filter device 4 is located can be determined. When N0< N1, first filtration instruction is shown to 4 pilot lamps of first air filter equipment, can make 4 pilot lamps of first air filter equipment show colours such as green, show that 4 filter effects of first air filter equipment are better, and the person of wearing can use at ease. When N1 is not less than N0 and is less than N2, the indicator lamp of the first air filtering device 4 displays a second filtering indication, so that the indicator lamp of the first air filtering device 4 can display colors such as yellow, and the like, which indicates that the filtering effect of the first air filtering device 4 is weakened, and a wearer needs to pay attention. When N0 is greater than or equal to N2, the controller controls the indicating device 9 to send a service life alarm signal of the first air filtering device 4, so that the indicator light of the first air filtering device 4 displays a third filtering indication, where the third filtering indication may be set to an indicator light display color different from the first filtering indication and the second filtering indication, for example, the indicator light may display red, or the same indicator light color band may flash or different indicator light color bands flash, for example, the indicator light may display red and flash. In order to attract the attention of the wearer, the indicator lamp of the first air filtering device 4 can also display a third filtering indication, and the controller controls the buzzer to give out a buzzing alarm. At this time, the wearer needs to pay attention to the remaining time during which the first air filter device 4 can be used, and needs to prepare for replacement of a new blower mask during the remaining time or withdrawal from the use environment. To the air supply face guard that this first air filter equipment 4 life expires, can change this air supply face guard's first air filter equipment 4, make this air supply face guard only need change first air filter equipment 4 just can used repeatedly, resources are saved avoids extravagant, reduce cost. When N0 is larger than or equal to N2 or the rotating speed of the fan 5 is adjusted, N is larger than Nmax, and any one of the N and the Nmax is detected, the controller controls the indicating device 9 to send out a service life alarm signal of the first air filtering device 4.
When the power is supplied by the battery, the electric quantity condition of the battery can be monitored, and the method for controlling the electric quantity indicator lamp to display the indication signal by the controller comprises the following steps:
when the residual electric quantity of the battery is greater than or equal to 2/3 of the full electric quantity of the battery, the electric quantity indicator lamp displays a first electric quantity indicator;
when the residual electric quantity of the battery is less than 2/3 of the full electric quantity of the battery and is more than or equal to 1/3 of the full electric quantity of the battery, the electric quantity indicator lamp displays a second electric quantity indication;
when the residual capacity of the battery is less than 1/3 of the full capacity of the battery, the controller controls the indicating device 9 to send out an alarm signal: the electric quantity indicator lamp displays a third electric quantity indication; or the electric quantity indicating lamp displays a third electric quantity indication, and the buzzer gives out buzzing alarm.
When battery residual capacity is greater than or equal to 2/3 of the full electric quantity of battery, the electric quantity pilot lamp shows that first electric quantity is instructed, can make electric quantity pilot lamp show colour such as green, shows that battery electric quantity is sufficient, wears the personnel and can use by relieved. When the residual electric quantity of the battery is less than 2/3 of the full electric quantity of the battery and is more than or equal to 1/3 of the full electric quantity of the battery, the electric quantity indicating lamp displays second electric quantity indication, the electric quantity indicating lamp can display colors such as yellow, the electric quantity of the battery is lost, and a wearer needs to pay attention. When the remaining battery capacity is less than 1/3 of the full battery capacity, the controller controls the indicating device 9 to send out a low battery alarm signal to make the power indicator light display a third power indication, which may be set to a different indicator light color from the first power indication and the second power indication, for example, the indicator light may be made to display red, or the same indicator light color band may flash, or a different indicator light color band may flash, etc., for example, the indicator light may be made to display red and flash. In order to attach importance to the wearer, the electric quantity indicating lamp can display a third electric quantity indication, and the controller controls the buzzer to give out a buzzing alarm. In this case, the wearer needs to pay attention to the remaining time during which the battery power can be used, and needs to replace the blower mask with a new one, replace the battery, charge the battery, or leave the use environment.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (16)
1. A medical power air supply mask is characterized by comprising a mask body, an air supply system and a control system, wherein,
the mask body is provided with an accommodating cavity;
the air supply system comprises a mask air inlet, a first air filtering device, a fan and a face air blowing port; the first air filtering device is arranged between the air inlet of the mask and the inlet of the fan; the face air blowing port is arranged on the side wall of the accommodating cavity and is communicated with an outlet of the fan; the accommodating cavity is provided with an opening facing the first air filtering device, the accommodating cavity is provided with a partition board, the partition board is tightly sealed with the opening of the accommodating cavity, the fan is arranged on the partition board, the inlet of the fan faces the outer side of the accommodating cavity, and the outlet of the fan faces the inner side of the accommodating cavity; and/or the fan is arranged in the accommodating cavity, and an outlet of the fan is closely connected with the face blowing port;
the control system is arranged on the mask body and comprises a controller and a pressure sensor, the pressure sensor is used for detecting the air outlet pressure of the fan and sending the collected pressure signal to the controller, and the controller adjusts the rotating speed of the fan according to the air outlet pressure signal of the fan.
2. The medical powered air delivery mask according to claim 1, wherein the receiving chamber is disposed at a forehead portion of the mask body; the first air filtering device covers the outer side of the partition plate and at least covers the inlet of the fan; the outer side of the first air filtering device is provided with a front cover, and the air inlet of the face mask is formed in the front cover.
3. The medical powered air delivery mask of claim 2, wherein the fans are two centrifugal fans; the air inlet of the mask is arranged at the bottom of the front cover; the facial mouth of blowing sets up in the bottom that holds the chamber.
4. A medical powered air delivery mask according to claim 2 or claim 3, wherein the baffle is a housing on the inlet side of the blower.
5. A medical powered air delivery mask according to claim 1, wherein the bottom of the mask body is provided with an air outlet having an openable valve cover, and a second removable air filtering device is provided inside the valve cover.
6. A medical powered air delivery mask according to claim 1, wherein the control system further comprises an indicator device comprising an indicator light and/or a buzzer, the indicator light comprising a first air filtration device indicator light and/or a flow indicator light.
7. The medical powered air delivery mask of claim 6, wherein the control system further comprises a battery and a control button, the control button being used to turn on and off and control a gear of the blower; the indicator light also comprises an electric quantity indicator light.
8. The medical powered air delivery mask as recited in claim 7, wherein the controller controls the flow indicator light to display the indication signal by:
s1, setting a low-pressure alarm threshold value P' according to a standard air outlet pressure P0;
s2, reading an actual air outlet pressure P and a gear signal of an air outlet of the fan by the controller, and obtaining a low-pressure alarm threshold value P' according to the gear signal;
s3, the controller compares the actual air outlet pressure P with a low-pressure alarm threshold value P':
when P is larger than or equal to P', the flow indicator lamp displays a first flow indicator;
when P is less than P', the controller controls the indicating device to send out a low-flow alarm signal: the flow indicator light displays a second flow indication; or the flow indicator lamp displays the second flow indication, and the buzzer gives out buzzing alarm.
9. The medical powered air delivery mask according to claim 8, wherein the low pressure warning threshold P' is set to 60% P0; preferably, the low pressure warning threshold P' is set to 70%; preferably, the low pressure warning threshold P' is set to 80%.
10. The medical power air supply mask according to claim 8 or 9, wherein the controller controls the fan to adjust the rotation speed so that the air outlet pressure of the fan is within a set range, and the specific method comprises the following steps:
s1, setting a lower air outlet pressure limit Pmin and an upper air outlet pressure limit Pmax according to a standard air outlet pressure P0;
s2, reading an actual air outlet pressure P and a gear signal of an air outlet of the fan by the controller, and obtaining an air outlet pressure lower limit Pmin and an air outlet pressure upper limit Pmax according to the gear signal;
s3, the controller compares the actual air outlet pressure P with the lower air outlet pressure limit Pmin and the upper air outlet pressure limit Pmax:
when P is less than Pmin or P is more than Pmax, the controller controls the fan to adjust the rotating speed according to the increment delta N, so that P is less than or equal to Pmin and less than or equal to Pmax.
11. The medical powered air delivery mask as recited in claim 10, wherein the lower outlet air pressure limit Pmin and the upper outlet air pressure limit Pmax are set to 90%P0 and 110%; preferably, the lower outlet pressure limit Pmin and the upper outlet pressure limit Pmax are set to 95% p0 and 105% respectively; preferably, the lower outlet air pressure limit Pmin and the upper outlet air pressure limit Pmax are set to 98% p0 and 102%, respectively, p0.
12. The medical powered air delivery mask according to claim 10, wherein when the blower increases in speed by an increment Δ N, and the controller detects that the speed N of the blower to be adjusted is greater than a maximum speed Nmax of the blower, the blower operates at the maximum speed Nmax, the controller controls the indicating device to issue the first air filtering device life warning signal.
13. The medical powered air delivery mask as recited in claim 12, wherein the delta Δ N is 50-200r/min.
14. The medical powered air supply mask as claimed in claim 10, wherein when P is less than Pmin, the actual outlet air pressure P is compared with a low pressure alarm threshold P ', or before the actual outlet air pressure P is compared with a lower outlet air pressure limit Pmin, the actual outlet air pressure P is compared with the low pressure alarm threshold P ', and when P is less than Pmin and P is greater than or equal to P ', the controller controls the fan to adjust the rotation speed according to the increment Δ N, so that P is greater than or equal to Pmin and less than or equal to Pmax; when P is less than P', the controller controls the indicating device to send out a low-flow alarm signal.
15. The medical powered air delivery mask as recited in claim 14, wherein the controller controls the indicator light of the first air filtration device to display the indicator signal by:
s1, a controller reads a gear signal to obtain corresponding fan rotating speeds N1 and N2 when used time T is 1/2 and 3/4 of the available time T of a first air filtering device under a corresponding gear of the first air filtering device; preferably, under the corresponding gear of the first air filtering device, the used time T is 1/3 and 2/3 of the available time T of the first air filtering device, and the corresponding fan rotating speeds N1 and N2 are obtained respectively;
s2, the controller reads the current rotating speed N0 of the fan, and compares the N0 with the N1 and the N2:
when N0< N1, the first air filtration device indicator light displays a first filtration indication;
when N1 is more than or equal to N0 and less than N2, the first air filtering device indicator lamp displays a second filtering indication;
when N0 is larger than or equal to N2, the controller controls the indicating device to send out a service life alarm signal of the first air filtering device: the first air filtration device indicator light displays a third filtration indication; or the first air filtering device indicator lamp displays a third filtering indication, and the buzzer gives out a buzzing alarm.
16. The medical powered air delivery mask according to claim 7, wherein the method for the controller to control the electric quantity indicator light to display the indication signal is as follows:
when the residual electric quantity of the battery is greater than or equal to 2/3 of the full electric quantity of the battery, the electric quantity indicator lamp displays a first electric quantity indicator;
when the residual electric quantity of the battery is less than 2/3 of the full electric quantity of the battery and is more than or equal to 1/3 of the full electric quantity of the battery, the electric quantity indicator lamp displays a second electric quantity indication;
when the residual capacity of the battery is less than 1/3 of the full capacity of the battery, the controller controls the indicating device to send out a low-capacity alarm signal: the electric quantity indicator lamp displays a third electric quantity indication; or the electric quantity indicating lamp displays the third electric quantity indication, and the buzzer gives out buzzing alarm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210856302.3A CN115228000A (en) | 2022-07-13 | 2022-07-13 | Medical power air supply mask |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210856302.3A CN115228000A (en) | 2022-07-13 | 2022-07-13 | Medical power air supply mask |
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| CN115228000A true CN115228000A (en) | 2022-10-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210856302.3A Pending CN115228000A (en) | 2022-07-13 | 2022-07-13 | Medical power air supply mask |
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