CN111513387A - Method for preventing pollutant from entering inner side of protective device and protective device - Google Patents

Method for preventing pollutant from entering inner side of protective device and protective device Download PDF

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Publication number
CN111513387A
CN111513387A CN202010365877.6A CN202010365877A CN111513387A CN 111513387 A CN111513387 A CN 111513387A CN 202010365877 A CN202010365877 A CN 202010365877A CN 111513387 A CN111513387 A CN 111513387A
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air
pressure
value
real
controller
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于冬青
卢达
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Shenzhen Ruiyuanxiang Rubber Plastic Products Co ltd
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Shenzhen Ruiyuanxiang Rubber Plastic Products Co ltd
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Publication of CN111513387A publication Critical patent/CN111513387A/en
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    • 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
    • A41D13/1161—Means for fastening to the user's head
    • 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
    • A41D13/12—Surgeons' or patients' gowns or dresses
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B7/00—Footwear with health or hygienic arrangements
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/04—Eye-masks ; Devices to be worn on the face, not intended for looking through; Eye-pads for sunbathing
    • A61F9/045—Eye-shades or visors; Shields beside, between or below the eyes
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B17/00—Protective clothing affording protection against heat or harmful chemical agents or for use at high altitudes
    • 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
    • A62B18/006—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 with pumps for forced ventilation
    • 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
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/20—Control of fluid pressure characterised by the use of electric means
    • G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
    • G05D16/2013—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means
    • G05D16/2026—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means with a plurality of throttling means

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Pulmonology (AREA)
  • Fluid Mechanics (AREA)
  • Public Health (AREA)
  • Textile Engineering (AREA)
  • Biomedical Technology (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Veterinary Medicine (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Ophthalmology & Optometry (AREA)
  • Toxicology (AREA)
  • Epidemiology (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Ventilation (AREA)

Abstract

The invention relates to a method for preventing pollutants from entering the inner side of a protective device and the protective device, and belongs to the technical field of human body protective devices. A method of preventing contaminants from entering the inside of a protective device, said protective device being a face shield, eye shield or mouth shield, comprising: after the protective device is worn on a user, the pressure intensity of the inner side of the protective device is ensured to be larger than the pressure intensity of the external environment and to be kept constant. In the method, because the pressure intensity of the inner side of the protection device is always ensured to be larger than the pressure intensity of the external environment, the pollutants of the external environment can not enter the inner side of the protection device under the pressure difference between the inside and the outside of the protection device; in addition, the pressure intensity inside the protective device is always ensured to be constant, and the comfort of a user in use is also ensured.

Description

Method for preventing pollutant from entering inner side of protective device and protective device
Technical Field
The invention relates to a method for preventing pollutants from entering the inner side of a protective device and the protective device, and belongs to the technical field of human body protective devices.
Background
The existing protection device (such as a protective mask, a protective mask and a protective eye shield) is difficult to be completely tightly attached to a user when the user wears the protection device for use, so that external pollutants are possibly introduced into the inner side of the protection device, and the user is polluted. In addition, in the protective mask and the eye shield, a fan is also arranged in the prior art for demisting, and fresh air is blown into the inner side of the protective mask or the eye shield through the fan; although the scheme realizes that the pressure on the inner side of the protective mask or the protective eye cover is higher than the pressure of the external environment by accident, the fan always inputs air, so that the pressure on the inner side is unstable, and the comfort of a user in use is influenced.
Disclosure of Invention
The technical problem to be solved by the invention is that the existing protection device cannot effectively prevent pollutants from entering the inner side of the protection device.
In order to solve the technical problems, the invention provides the following technical scheme:
a method of preventing contaminants from entering the inside of a protective device, said protective device being a face shield, eye shield or mouth shield, comprising:
after the protective device is worn on a user, the pressure intensity of the inner side of the protective device is ensured to be larger than the pressure intensity of the external environment and to be kept constant.
In the method, because the pressure intensity of the inner side of the protection device is always ensured to be higher than the pressure intensity of the external environment, the pollutants of the external environment can not enter the inner side of the protection device under the pressure difference between the inside and the outside of the protection device; in addition, the pressure intensity inside the protective device is always ensured to be constant, and the comfort of a user in use is also ensured.
Specifically, the step of ensuring that the pressure inside the protective device is greater than the pressure in the external environment and is kept constant includes the following specific steps:
obtaining a pressure holding value P of the inner side of the protective device0(ii) a The pressure holding value P0Greater than the pressure P of the external environmentRing (C)；
Acquiring the real-time detection value P of each preset air pressure detection mechanism every interval time delta tn；
Judging the real-time detection value PnWhether or not less than the pressure holding value P0；
If yes, pressurizing the inner side of the protection device within the next time length delta t until the real-time detection value PnGreater than or equal to the pressure holding value P0。
Specifically, the specific process of pressurizing the inner side of the protection device in the next time period Δ t is as follows:
increase the volume flow V of air per unit time of a ventilation mechanism which is preset and inputs air to the inner side of the protection deviceIntoAnd/or reducing the volume flow volume Vout of the air in unit time of an exhaust mechanism which is preset and exhausts the air to the outside of the protection device.
Further, the number of the air pressure detection mechanisms is at least two;
the judgment real-time detection value PnWhether or not less than the pressure holding value P0The specific process comprises the following steps:
judging whether there is a real-time detection value P detected by at least one air pressure detection mechanismnLess than the pressure holding value P0。
Further, the method also comprises the following steps:
judging the real-time detection value PnWhether or not it is greater than the pressure holding value P0；
If yes, decompressing the inner side of the protection device within the next time period delta t until the real-time detection value PnLess than or equal to the pressure holding value P0(ii) a The specific process is as follows:
reducing the volume flow rate V of air per unit time of a ventilation mechanism which is preset and inputs air to the inner side of the protection deviceIntoAnd/or increasing the volume flow rate V of air per unit time of a preset exhaust mechanism for exhausting gas to the outside of the protection deviceGo outUp to the real-time pressure value PnLess than or equal to the pressure holding value P0。
Specifically, the number of the air pressure detection mechanisms is at least two;
the judgment real-time detection value PnWhether or not it is greater than the pressure holding value P0The specific process comprises the following steps:
judging whether there is a real-time detection value P detected by at least one air pressure detection mechanismnGreater than the pressure holding value P0。
The invention also provides a protective device, which comprises a device body provided with at least one vent, a power supply arranged on the device body, a controller arranged on the device body and electrically connected with the power supply, a ventilation mechanism arranged on the device body and connected with the controller, and an air pressure detection mechanism connected with the controller and used for detecting the pressure intensity inside the device body;
the controller obtains a pressure maintaining value P of the inner side of the device body0(ii) a The pressure holding value P0Greater than the pressure P of the external environmentRing (C)；
The controller obtains the real-time detection value P of each air pressure detection mechanism at intervals of time delta tn；
The controller judges a real-time detection value PnWhether or not less than the pressure holding value P0；
If so, the volume flow rate V of the air per unit time of the ventilation mechanism for inputting the air to the inner side of the device body is increased within the next time length delta tIntoAnd/or reducing the volume flow rate V of air per unit time of a ventilation mechanism for discharging air to the outside of the device bodyGo outUntil a real-time detection value P is detectednGreater than or equal to the pressure holding value P0。
The protection device adopts the structure and the components, so that the controller can acquire the real-time pressure value P inside the device body according to the air pressure detection mechanismnAnd then judging the real-time pressure value PnWhether or not less than the pressure holding value P0(ii) a If so, the volume flow V of the air per unit time of the ventilation mechanism for inputting the air to the inner side of the protection device is increased within the next time length delta tIntoAnd/or reducing the venting mechanism of the gas to the outside of the shielding device per unit timeVolume flow rate V of airGo outUp to the real-time pressure value PnGreater than or equal to the pressure holding value P0. Because the pressure intensity of the inner side of the protection device is always ensured to be higher than the pressure intensity of the external environment, the pollutants of the external environment can not enter the inner side of the protection device under the pressure difference between the inside and the outside of the protection device; in addition, the pressure intensity inside the protective device is always ensured to be constant, and the comfort of a user in use is also ensured.
Further, the controller also judges a real-time detection value PnWhether or not it is greater than the pressure holding value P0；
If yes, the controller reduces the volume flow V of air per unit time of the ventilation mechanism for inputting air to the inner side of the device body within the next time period delta tIntoAnd/or increase the volume flow rate V of air per unit time of a ventilation mechanism for discharging air to the outside of the device bodyGo outUp to the real-time pressure value PnLess than or equal to the pressure holding value P0。
Specifically, according to practical situations, the following two types of situations exist in the connection relationship of the controller, the ventilation mechanism and the air pressure detection mechanism:
the first type: the number of controllers may be only 1; the air exchange mechanism and the air pressure detection mechanism are both connected with the controller; at the moment, all the ventilation mechanisms and the air pressure detection mechanisms are controlled by one controller;
the second type: the number of the air exchange mechanisms and the number of the controllers are the same, and the air exchange mechanisms and the controllers are at least two, and one air exchange mechanism is uniquely matched and connected with one controller, namely one controller only controls one air exchange mechanism, and one air exchange mechanism is also controlled by one controller;
the number of the air pressure detection mechanisms can be 1, and at least two air pressure detection mechanisms can be provided; the second case can therefore be subdivided into the following three cases:
the first method comprises the following steps: when the number of the air pressure detection mechanisms is 1, all the controllers are connected, namely all the controllers acquire the pressure intensity of the inner side of the device body through the air pressure detection mechanisms;
and the second method comprises the following steps: when the number of the air pressure detection mechanisms is at least two, each air pressure detection mechanism is respectively connected with all the controllers, namely all the controllers respectively obtain the pressure intensity of the inner side of the device body through all the air pressure detection mechanisms;
and the third is that: when the number of the air pressure detection mechanisms is at least two, the number of the air pressure detection mechanisms is the same as that of the controllers, and one air pressure detection mechanism is only in unique matching connection with one controller, namely, each controller only obtains the pressure intensity at the inner side of the device body through one air pressure detection mechanism, and the air pressure detection mechanisms connected with the controllers are not overlapped.
Specifically, the protective device is a protective mask, a protective eye shield, a protective mask, a protective shoe or an isolation suit.
Specifically, the ventilation mechanism is a fan or an air pump.
Furthermore, the voice communication device is convenient for the user to communicate with other people by voice, and comprises a microphone and a loudspeaker which are electrically connected with a power supply; the microphone is arranged on the inner side of the device body and close to the mouth of the user; the loudspeaker is arranged on the outer side of the device body.
Furthermore, in order to ensure the protection effect of the protection device, the protection device also comprises a filtering material arranged at the vent.
Drawings
FIG. 1 is a flow chart of a method of preventing contaminants from entering the inside of a shielding device according to example 1 of the present invention;
fig. 2 is a flowchart of step S100 of a method for preventing contaminants from entering the inside of the protection device according to embodiment 1 of the present invention;
fig. 3 is a schematic structural view of a protection device according to embodiment 2 of the present invention;
fig. 4 is an exploded view of a shielding device according to embodiment 2 of the present invention.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
As shown in fig. 1, a method of preventing contaminants from entering the inside of a protective device, such as a face shield, eye shield or mouth shield, comprising the steps of:
s100, after the protection device is worn on a user, the pressure intensity of the inner side of the protection device is ensured to be larger than the pressure intensity of the external environment and to be kept constant.
Specifically, the step S100 includes the following specific steps:
s10 obtaining the pressure maintaining value P inside the protective device0(ii) a The pressure holding value P0Greater than the pressure P of the external environmentRing (C)(ii) a In the present embodiment, the pressure holding value P01.1 atmosphere of external environment; of course, in other embodiments, other values are also possible.
S20, acquiring real-time detection value P of each preset air pressure detection mechanism (one air pressure detection mechanism is arranged in the embodiment) at intervals of time delta tn(ii) a In this embodiment, the duration Δ t may be any value within 0.001s to 0.1s, as long as the existing equipment technology can be implemented, the smaller the duration Δ t, the better;
s30 judging real-time detection value PnWhether or not less than the pressure holding value P0；
S40, pressurizing the inner side of the protection device within the next time period delta t until the real-time detection value PnGreater than or equal to the pressure holding value P0。
Specifically, the specific process of step S40 is:
increase the volume flow V of air per unit time of a ventilation mechanism which is preset and inputs air to the inner side of the protection deviceIntoAnd/or reducing the volume flow rate V of air per unit time of a preset exhaust mechanism for exhausting gas to the outside of the protection deviceGo outUp to the real-time pressure value PnGreater than or equal to the pressure holding value P0。
Further, in other embodiments, at least two of the air pressure detection mechanisms;
the specific process of step S30 is as follows:
judging whether there is a real-time detection value P detected by at least one air pressure detection mechanismnLess than the pressure holding value P0。
Further, in other embodiments, the method further comprises the steps of:
judging the real-time detection value PnWhether or not it is greater than the pressure holding value P0；
If yes, decompressing the inner side of the protection device within the next time period delta t until the real-time detection value PnLess than or equal to the pressure holding value P0(ii) a The specific process is as follows:
reducing the volume flow rate V of air per unit time of a ventilation mechanism which is preset and inputs air to the inner side of the protection deviceIntoAnd/or increasing the volume flow rate V of air per unit time of a preset exhaust mechanism for exhausting gas to the outside of the protection deviceGo outUp to the real-time pressure value PnLess than or equal to the pressure holding value P0。
Further, at least two air pressure detection mechanisms are arranged;
the judgment real-time detection value PnWhether or not it is greater than the pressure holding value P0The specific process comprises the following steps:
judging whether there is a real-time detection value P detected by at least one air pressure detection mechanismnGreater than the pressure holding value P0。
In summary, the following steps: in the method, because the pressure intensity of the inner side of the protection device is always ensured to be higher than the pressure intensity of the external environment, the pollutants of the external environment can not enter the inner side of the protection device under the pressure difference between the inside and the outside of the protection device; in addition, the pressure intensity inside the protective device is always ensured to be constant, and the comfort of a user in use is also ensured.
Example 2
A protective device 100, which is an example of a protective mask (in other embodiments, the protective mask may be an eyeshade, a protective mask, a protective shoe or an isolation suit), includes a device body 10 having at least one vent 11, a power source 20 (in this embodiment, the power source 20 is disposed in the device body 10, and may be disposed independently of the device body 10), a controller 30 electrically connected to the power source 20 (in this embodiment, the controller 30 is disposed in the device body 10, and may be disposed independently of the device body 10), a ventilation mechanism 40 connected to the controller 30 and disposed in the device body 10, and an air pressure detecting mechanism 50 connected to the controller 30 and configured to detect the pressure inside the device body 10;
the controller 30 obtains a pressure maintaining value P inside the device body 100(ii) a The pressure holding value P0Greater than the pressure P of the external environmentRing (C)；
The controller 30 obtains the real-time detection value P of each air pressure detection mechanism 50 every interval time Δ tn；
The controller 30 determines the real-time detection value PnWhether or not less than the pressure holding value P0；
If so, the volume flow rate V of air per unit time of the ventilation mechanism 40 for introducing gas to the inside of the apparatus body 10 is increased for the next time period DeltatIntoAnd/or to reduce the volume flow rate V of air per unit time of the ventilation means 40 for discharging gas to the outside of the apparatus body 10Go outUp to the real-time pressure value PnGreater than or equal to the pressure holding value P0。
In this embodiment, only one air pressure detecting mechanism 50 is provided, and in other embodiments, at least two air pressure detecting mechanisms may be provided, and at this time, the controller 30 determines whether there is one real-time detecting value PnLess than the pressure holding value P0；
If so, the volume flow rate V of air per unit time of the ventilation mechanism 40 for introducing gas to the inside of the apparatus body 10 is increased for the next time period DeltatIntoAnd/or to reduce the volume flow rate V of air per unit time of the ventilation means 40 for discharging gas to the outside of the apparatus body 10Go outUp to the real-time pressure value PnGreater than or equal to the pressure holding value P0。
Further, in other embodiments, the controller 30 further determines the real-time detection value PnWhether or not it is greater than the pressure holding value P0(when there is only one air pressure detecting means 50, air pressure is usedWhen there are at least two pressure detection mechanisms 50, the controller 30 further determines whether there is a real-time detection value PnGreater than the pressure holding value P0)
If so, the controller 30 decreases the volume flow rate V of air per unit time of the ventilation mechanism 40 for introducing gas to the inside of the apparatus body 10 for the next time period Δ tIntoAnd/or increase the volume flow rate V of air per unit time of the ventilation mechanism 40 for discharging gas to the outside of the apparatus body 10Go outUp to the real-time pressure value PnLess than or equal to the pressure holding value P0。
Specifically, in this embodiment, the ventilation mechanism 40 is a fan; of course, in other embodiments, an air pump may also be employed.
Specifically, in this embodiment, the number of the controllers 30 is only 1; the ventilation mechanism 40 and the air pressure detection mechanism 50 are both connected with the controller; all the ventilation mechanisms 40 and the air pressure detection mechanisms 50 are controlled by one controller 30;
of course, in other embodiments, the number of the ventilation mechanisms 40 and the number of the controllers 30 are the same, and each of the ventilation mechanisms 40 and the controllers 30 are at least two, and one ventilation mechanism 40 and one controller 30 are uniquely matched, that is, one controller 30 only controls one ventilation mechanism 40, and one ventilation mechanism 40 only is controlled by one controller 30; the number of the air pressure detection mechanisms 50 is 1, and the air pressure detection mechanisms are connected with all the controllers 30, that is, all the controllers 30 obtain the pressure intensity inside the device body 10 through the air pressure detection mechanisms 50;
or;
the number of the ventilating mechanisms 40 and the number of the controllers 30 are at least two, and one ventilating mechanism 40 and one controller 30 are in unique matching connection, namely one controller 30 only controls one ventilating mechanism 40, and one ventilating mechanism 40 is only controlled by one controller 30; at least two air pressure detection mechanisms 50 are provided, each air pressure detection mechanism 50 is respectively connected with all controllers 30, that is, all controllers 30 respectively obtain the pressure inside the device body 10 through all air pressure detection mechanisms 50;
or;
the number of the ventilating mechanisms 40 and the number of the controllers 30 are at least two, and one ventilating mechanism 40 and one controller 30 are in unique matching connection, namely one controller 30 only controls one ventilating mechanism 40, and one ventilating mechanism 40 is only controlled by one controller 30; the number of the air pressure detection mechanisms 50 is at least two, and is the same as that of the controllers 30, and one air pressure detection mechanism 50 is only in matching connection with one controller 30, that is, each controller 30 only obtains the pressure inside the device body 10 through one air pressure detection mechanism 50, and the air pressure detection mechanisms 50 connected with each controller 30 do not overlap.
Further, in other embodiments, in order to facilitate the voice communication between the user and others, a microphone (not shown) and a speaker (not shown) electrically connected to the power source 20 are further included; the microphone is arranged on the inner side of the device body 10 and close to the mouth of the user; the horn is arranged outside the device body 10.
Further, in other embodiments, in order to ensure the protection effect of the protection device 100, a filter material is further included at the vent 11; the filter material can adopt the conventional filter materials such as activated carbon, melt-blown cloth and the like.
In summary, the following steps: the protection device adopts the structure and the components, so that the controller can acquire the real-time pressure value P inside the device body according to the air pressure detection mechanismnAnd then judging the real-time pressure value PnWhether or not less than the pressure holding value P0(ii) a If so, the volume flow V of the air per unit time of the ventilation mechanism for inputting the air to the inner side of the protection device is increased within the next time length delta tIntoAnd/or reducing the volume flow rate V of air per unit time of an exhaust mechanism for exhausting gas to the outside of the protective deviceGo outUp to the real-time pressure value PnGreater than or equal to the pressure holding value P0. Because the pressure intensity of the inner side of the protection device is always ensured to be higher than the pressure intensity of the external environment, the pollutants of the external environment can not enter the inner side of the protection device under the pressure difference between the inside and the outside of the protection device; in addition, the constant pressure intensity at the inner side of the protective device is always ensured, and the comfort of a user in use is also ensured。
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.

Claims (10)

1. A method of preventing contaminants from entering the inside of a protective device, wherein the protective device is a face shield, eye shield or mouth shield, comprising:
after the protective device is worn on a user, the pressure intensity of the inner side of the protective device is ensured to be larger than the pressure intensity of the external environment and to be kept constant.
2. A method of preventing ingress of contaminants inside a shielding device according to claim 1,
the method for ensuring that the pressure inside the protective device is greater than the pressure of the external environment and is kept constant comprises the following specific steps:
obtaining a pressure holding value P of the inner side of the protective device0(ii) a The pressure holding value P0Greater than the pressure P of the external environmentRing (C)；
Acquiring the real-time detection value P of each preset air pressure detection mechanism every interval time delta tn；
Judging the real-time detection value PnWhether or not less than the pressure holding value P0；
If yes, pressurizing the inner side of the protection device within the next time length delta t until the real-time detection value PnGreater than or equal to the pressure holding value P0。
3. A method for preventing the ingress of contaminants inside a shielding device according to claim 2, wherein the step of pressurizing the inside of the shielding device for the next time period Δ t comprises:
increasing the unit time of a preset ventilation mechanism for inputting gas to the inner side of the protection deviceVolume flow V of air in roomIntoAnd/or reducing the volume flow rate V of air per unit time of a preset exhaust mechanism for exhausting gas to the outside of the protection deviceGo out。
4. A method of preventing ingress of contaminants into the inside of a shielding device according to claim 2 or 3, wherein there are at least two of said air pressure sensing means;
the judgment real-time detection value PnWhether or not less than the pressure holding value P0The specific process comprises the following steps:
judging whether there is a real-time detection value P detected by at least one air pressure detection mechanismnLess than the pressure holding value P0。
5. A method of preventing ingress of contaminants inside a shielding device according to claim 2, further comprising the step of:
judging the real-time detection value PnWhether or not it is greater than the pressure holding value P0；
If yes, decompressing the inner side of the protection device within the next time period delta t until the real-time detection value PnLess than or equal to the pressure holding value P0(ii) a The specific process is as follows:
reducing the volume flow rate V of air per unit time of a ventilation mechanism which is preset and inputs air to the inner side of the protection deviceIntoAnd/or increasing the volume flow rate V of air per unit time of a preset exhaust mechanism for exhausting gas to the outside of the protection deviceGo outUp to the real-time pressure value PnLess than or equal to the pressure holding value P0。
6. A method of preventing ingress of contaminants to the inside of a shielding device according to claim 5, wherein the air pressure detection means is at least two;
the judgment real-time detection value PnWhether or not it is greater than the pressure holding value P0The specific process comprises the following steps:
determining whether there is real-time detection by at least one air pressure detection mechanismValue PnGreater than the pressure holding value P0。
7. A protection device is characterized by comprising a device body provided with at least one vent, a power supply, a controller electrically connected with the power supply, a ventilation mechanism arranged on the device body and connected with the controller, and an air pressure detection mechanism connected with the controller and used for detecting the pressure intensity inside the device body;
the controller obtains a pressure maintaining value P of the inner side of the device body0(ii) a The pressure holding value P0Greater than the pressure P of the external environmentRing (C)；
The controller obtains the real-time detection value P of each air pressure detection mechanism at intervals of time delta tn；
The controller judges a real-time detection value PnWhether or not less than the pressure holding value P0；
If so, the volume flow rate V of the air per unit time of the ventilation mechanism for inputting the air to the inner side of the device body is increased within the next time length delta tIntoAnd/or reducing the volume flow rate V of air per unit time of a ventilation mechanism for discharging air to the outside of the device bodyGo outUntil a real-time detection value P is detectednGreater than or equal to the pressure holding value P0。
8. The protective device of claim 7, wherein the controller further determines a real-time detection value PnWhether or not it is greater than the pressure holding value P0；
If yes, the controller reduces the volume flow V of air per unit time of the ventilation mechanism for inputting air to the inner side of the device body within the next time period delta tIntoAnd/or increase the volume flow rate V of air per unit time of a ventilation mechanism for discharging air to the outside of the device bodyGo outUp to the real-time pressure value PnLess than or equal to the pressure holding value P0。
9. Guard means according to claim 7 or 8 characterised in that the number of controllers is 1; the air exchange mechanism and the air pressure detection mechanism are both connected with the controller;
or;
the number of the air exchange mechanisms and the number of the controllers are the same, and the air exchange mechanisms and the controllers are at least two, and one air exchange mechanism and one controller are in unique matching connection; the number of the air pressure detection mechanisms is 1; the air pressure detection mechanism is connected with each controller;
or;
the number of the air exchange mechanisms and the number of the controllers are the same and are at least two, and one air exchange mechanism is uniquely matched and connected with one controller; at least two air pressure detection mechanisms are arranged and are connected with each controller;
or;
the air exchange mechanism, the air pressure detection mechanism and the controller are the same in quantity and are at least two, and one air exchange mechanism, one air pressure detection mechanism and one controller are in unique matching connection.
10. The protective device according to claim 7 or 8, wherein the protective device is a face shield, eye shield, mouth shield, footwear or protective clothing;
and/or;
the air exchange mechanism is a fan or an air pump;
and/or;
the microphone and the loudspeaker are electrically connected with the power supply; the microphone is arranged on the inner side of the device body and close to the mouth of the user; the loudspeaker is arranged on the outer side of the device body;
and/or;
also comprises a filter material arranged at the vent.
CN202010365877.6A 2020-04-30 2020-04-30 Method for preventing pollutant from entering inner side of protective device and protective device Pending CN111513387A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010365877.6A CN111513387A (en) 2020-04-30 2020-04-30 Method for preventing pollutant from entering inner side of protective device and protective device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010365877.6A CN111513387A (en) 2020-04-30 2020-04-30 Method for preventing pollutant from entering inner side of protective device and protective device

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Publication Number Publication Date
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Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103970159A (en) * 2014-05-15 2014-08-06 华中科技大学 Quick air inflation type micro-positive pressure protection system
CN204317571U (en) * 2014-12-23 2015-05-13 毕连柱 A kind of portable electric pressurization gas storage type protective mask
CN107929969A (en) * 2017-12-22 2018-04-20 深呼吸创造智能科技（天津）有限公司 A kind of two fans breathing mask and its implementation
CN108619628A (en) * 2017-03-20 2018-10-09 郑辉 A kind of mask of built-in double fan
CN110507496A (en) * 2019-09-06 2019-11-29 上海创始实业（集团）有限公司 Air bag pad assembly, intelligent pressure sore prevention seat cushion and monitor system
CN110652663A (en) * 2019-10-23 2020-01-07 蓝海高科（北京）科技有限公司 Breathing protection device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103970159A (en) * 2014-05-15 2014-08-06 华中科技大学 Quick air inflation type micro-positive pressure protection system
CN204317571U (en) * 2014-12-23 2015-05-13 毕连柱 A kind of portable electric pressurization gas storage type protective mask
CN108619628A (en) * 2017-03-20 2018-10-09 郑辉 A kind of mask of built-in double fan
CN107929969A (en) * 2017-12-22 2018-04-20 深呼吸创造智能科技（天津）有限公司 A kind of two fans breathing mask and its implementation
CN110507496A (en) * 2019-09-06 2019-11-29 上海创始实业（集团）有限公司 Air bag pad assembly, intelligent pressure sore prevention seat cushion and monitor system
CN110652663A (en) * 2019-10-23 2020-01-07 蓝海高科（北京）科技有限公司 Breathing protection device

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