CN107899151B - Pleasant anti-fog chemical experiment gas mask - Google Patents
Pleasant anti-fog chemical experiment gas mask Download PDFInfo
- Publication number
- CN107899151B CN107899151B CN201711194749.4A CN201711194749A CN107899151B CN 107899151 B CN107899151 B CN 107899151B CN 201711194749 A CN201711194749 A CN 201711194749A CN 107899151 B CN107899151 B CN 107899151B
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- air outlet
- mask body
- mask
- sealing part
- channel
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
- A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B15/00—Installations affording protection against poisonous or injurious substances, e.g. with separate breathing apparatus
-
- 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
- A62B18/082—Assembling eyepieces, lenses or vision-correction means in or on gas-masks
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B23/00—Filters for breathing-protection purposes
- A62B23/04—Filters for breathing-protection purposes for gasproof shelters
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Pulmonology (AREA)
- Toxicology (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
The invention discloses a pleasant anti-fog chemical experiment gas mask, which comprises a mask body and mask belts, wherein the mask belts are connected to the left side and the right side of the mask body; the filter comprises an air inlet, a filter element and an air outlet, the air outlet comprises a first air outlet and a second air outlet, the first air outlet is connected with a breathing channel, and the second air outlet is connected with a demisting channel; an eye window is arranged on the eye protection part, and an air blowing device is arranged at the edge of the upper side of the eye window and communicated with the demisting channel. According to the gas mask provided by the invention, the airflow baffle is arranged on the inner side wall of the mask body, the blowing device is arranged on the eye window of the eye protection part, and the atomization of the eye protection part can be effectively avoided through the combination of the airflow baffle and the blowing device, so that the work of a wearer is not influenced.
Description
Technical Field
The invention relates to a mask, in particular to a pleasant anti-fog chemical experiment gas mask.
Background
The gas mask is a personal special labor protection article, is also an individual protective article, is worn on the head to protect the respiratory organs, eyes and face of a person and prevent toxic substances such as poison gas, dust, bacteria, toxic and harmful gas or steam and the like from damaging the personal protective apparatus. The gas mask is widely applied to the fields of petroleum, chemical industry, mines, metallurgy, military, fire fighting, emergency rescue and relief, health and epidemic prevention, scientific and technological environmental protection, mechanical manufacturing and the like, and can play an important role in protecting the personal respiratory system in cities with severe haze and photochemical smog.
The traditional gas mask generally comprises a mask, a breathing part and a canister, however, when a wearer wears the gas mask to work, the eye window on the mask can be frequently atomized, and the wearer cannot see the operation object clearly, so that the wearer cannot continue to work. The mask is required to be cleaned frequently, inconvenience is brought to a wearer, and meanwhile, toxic substances such as toxic gas, dust, bacteria, toxic and harmful gas or steam exist in the working environment, so that the body of a worker can be injured when the mask is taken down in a workplace.
Disclosure of Invention
The invention aims to provide a pleasant anti-fog chemical experiment gas mask to solve the defects in the prior art.
In order to achieve the above purpose, the invention provides the following technical scheme:
a pleasant anti-fog chemical experiment gas mask comprises a mask body and mask belts, wherein the mask belts are connected to the left side and the right side of the mask body, an eye protection part, a breathing part and a filter are arranged on the mask body, an airflow baffle is arranged inside the mask body and positioned between the eye protection part and the breathing part, and the airflow baffle is rotationally connected to the inner side wall of the mask body; the filter comprises an air inlet, a filter element and an air outlet, wherein the air outlet comprises a first air outlet and a second air outlet, the first air outlet is connected with a breathing channel, and the second air outlet is connected with a demisting channel; an eye window is arranged on the eye protecting part, and an air blowing device is arranged at the edge of the upper side of the eye window and communicated with the demisting channel;
the blowing device comprises a driving mechanism and an air outlet channel, the air outlet channel comprises a left air outlet channel and a right air outlet channel, a plurality of air outlet holes are formed in the left air outlet channel and the right air outlet channel, and the central point of the eye window is located on the axis of the air outlet holes.
The gas mask is characterized in that the airflow blocking plate is a circular arc-shaped plate, the two end parts of the airflow blocking plate are close to one side edge of the mask body and are provided with clamping pieces, the mask body is correspondingly provided with clamping grooves, and the clamping grooves cover the rotation strokes of the clamping pieces.
Foretell respirator, be provided with on the face guard body and hold the chamber that holds of air flow baffle, hold the chamber set up in face guard body inside wall.
In the gas mask, two ends of the airflow baffle are connected to the inner side edge of the mask body through the rotating shaft, and the airflow baffle rotates around the rotating shaft to have an opening state and a storage state; in the opening state, the clamping piece is clamped in the clamping groove, and the airflow baffle plate blocks the upward movement of the airflow at the lower part of the baffle plate; in the storage state, the airflow baffle is stored in the containing cavity.
In the gas mask, the defogging channel is further provided with an opening device, the opening device comprises a sliding piece, the sliding piece comprises a sliding plate and a connecting plate, the sliding plate is connected to the outer side surface of the mask body in a sliding manner, and the connecting plate is provided with a sealing part; the seal portion includes a first seal portion and a second seal portion.
In the gas mask, the demisting channel is provided with the clamping cavity for the first sealing part to be clamped in, and the airflow baffle is provided with a plurality of air holes.
In the respirator, the sliding plate slides along the respirator body to have a communication state and a closing state, in the closing state, the first sealing part is clamped into the card cavity to close the demisting passage, and the second sealing part covers the vent hole to close the vent hole; in the communication state, the first sealing part leaves the card cavity to open the defogging channel, and the second sealing part leaves the vent hole to open the vent hole.
Foretell breathing mask, the slider has two, is provided with respectively the mask body left and right sides, airflow baffle's the left and right sides all is provided with the air vent, be provided with first sealing and second sealing on the sealing of left side slider, be provided with the second sealing on the sealing of right side slider.
In the technical scheme, the mask body is provided with the eye protection part, the breathing part and the filter, the inner side wall of the mask body is provided with the airflow baffle which can block gas exhaled by a wearer from flowing upwards from below, so that the exhaled gas is exhausted out of the mask body through the breathing part, the atomization of the eye protection part is avoided, meanwhile, the blowing device is arranged on an eye window of the eye protection part and can blow gas out of the eye window, steam cannot be attached to the eye window, and the eye protection part can be effectively prevented from being atomized by combining the airflow baffle with the blowing device, so that the work of the wearer is not influenced.
Drawings
In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.
FIG. 1 is a schematic diagram of a gas mask suitable for chemical anti-fogging experiments according to an embodiment of the present invention;
fig. 2 is a schematic structural view of an eye protection part according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a filter according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a sliding member according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a connection plate according to an embodiment of the present invention.
Description of reference numerals:
1. a mask body; 2. an eye protection part; 2.1, eye window; 3. a filter; 3.1, an air inlet; 3.2, a filter element; 3.3, an air outlet; 3.3.1, a first air outlet; 3.3.2, a second air outlet; 4. a demisting channel; 4.1, clamping the cavity; 5. an airflow baffle; 5.1, a rotating shaft; 5.2, clamping; 5.3, vent holes; 6. a card slot; 7. a blowing device; 7.1, an air outlet channel; 7.2, air outlet holes; 8. a slider; 8.1, a sliding plate; 8.2, connecting plates; 8.2.1, a first sealing part; 8.2.2, a second sealing part; 8.3, a left slider; 8.4, right slider; 9. a breathing part.
Detailed Description
In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.
As shown in fig. 1-5, the pleasant anti-fog chemical experiment gas mask provided by the embodiment of the invention comprises a mask body 1 and a mask belt, wherein the mask belt is connected to the left side and the right side of the mask body 1, an eye protection part 2, a breathing part 9 and a filter 3 are arranged on the mask body 1, an airflow baffle 5 is arranged inside the mask body 1, the airflow baffle 5 is positioned between the eye protection part 2 and the breathing part 9, and the airflow baffle 5 is rotatably connected to the inner side wall of the mask body 1; the filter 3 comprises an air inlet 3.1, a filter element 3.2 and an air outlet 3.3, the air outlet 3.3 comprises a first air outlet 3.3.1 and a second air outlet 3.3.2, the first air outlet 3.3.1 is connected with a breathing channel, and the second air outlet 3.3.2 is connected with a demisting channel 4; an eye window 2.1 is arranged on the eye protecting part 2, a blowing device 7 is arranged on the upper side edge of the eye window 2.1, and the blowing device 7 is communicated with the demisting channel 4.
The mask body 1 can be of a half-face structure and a full-face structure, the mask belt is used for fixing the mask body 1 on the head of a user, the mask belt can be an elastic belt and can also be a plurality of elastic belts, an adjusting buckle can be further arranged on the mask belt, the size of the mask belt can be adjusted conveniently by the adjusting buckle, different crowds can use the mask belt conveniently, the mask body 1 is provided with a eye protecting part 2, a breathing part 9 and a filter 3, the filter 3 is preferable, a filter 3 fixing part is arranged on the mask body 1, the filter 3 can be detachably fixed on the filter 3 fixing part, the filter 3 can be one or multiple, the filter 3 comprises a gas inlet 3.1, a filter element 3.2 and a gas outlet 3.3, gas is input through the gas inlet 3.1, the gas outlet is conveyed to the user after being filtered by the filter element 3.2, the gas outlet 3.3 comprises a first gas outlet 3.3.1 and a second gas outlet 3.2, the gas outlet is connected with a demisting gas conveying channel, and is connected with a demisting channel 3.3.3.3.3, and a demisting channel for conveying the user, and the gas outlet is connected with a demisting channel 3.3.3.3.2, and a second demisting channel for conveying the second demisting channel 3.3.3.3.3.3.3.3.3.3.2. Breathing part 9 can be outlet channel 7.1, be used for discharging mask body 1 with the air of user's exhalation, be provided with airflow baffle 5 at mask body 1 inboard, airflow baffle 5 is located between eye-protecting portion 2 and breathing part 9, airflow baffle 5 rotates and connects on mask body 1 inside wall, it is preferred, airflow baffle 5 is made by flexible material, airflow baffle 5 can rotate to the state perpendicular with mask body 1 inside wall, be used for stopping the air of user's exhalation from lower direction top, make the exhalant gas all discharge mask body 1 through breathing part 9, the condition of atomizing appears in so can avoiding eye-protecting portion 2, when need not using, can rotate airflow baffle 5 to the state that mask body 1 inside wall parallels, and simultaneously, in this embodiment, be provided with eye window 2.1 on eye window 2.1, the upside limit of eye window 2.1 is provided with blast apparatus 7, blast apparatus 7 includes actuating mechanism and outlet channel 7.1, actuating mechanism can be air compression mechanism, also can be through the mechanism of actuating blade wobbling, can also be other technologies that can produce, the drive mechanism and the demisting the eye window 2.1, thereby the condition that the emergence of atomizing appears in eye window 2.1 appears can be relative 4.1, thereby the drive mechanism is provided with the perpendicular air inlet of air outlet mechanism and the 3.2.1, the 3.1 of the drive mechanism, the 3.2.2 of the air inlet of the 3.1 of the 3.2 of the air outlet mechanism appears on the eye window, thereby the air compression mechanism, the phenomenon appears.
The invention provides a pleasant anti-fog chemical experiment gas mask, wherein a mask body 1 is provided with an eye protection part 2, a breathing part 9 and a filter 3, the inner side wall of the mask body 1 is provided with an airflow baffle 5, the airflow baffle 5 can prevent gas exhaled by a wearer from flowing from the lower part to the upper part, so that the exhaled gas is exhausted out of the mask body 1 through the breathing part 9, the atomization of the eye protection part 2 is avoided, meanwhile, a blowing device 7 is arranged on an eye window 2.1 of the eye protection part 2, the blowing device 7 can blow gas to the eye window 2.1, steam can not be attached to the eye window 2.1, and the eye protection part 2 can be effectively prevented from being atomized by combining the airflow baffle 5 and the blowing device 7, so that the work of the wearer is not affected.
In this embodiment, preferably, the airflow blocking plate is a circular arc-shaped plate, the clamping pieces 5.2 are arranged at two end portions of the airflow blocking plate 5 close to one side edge of the mask body, the mask body 1 is correspondingly provided with the clamping grooves 6, the clamping grooves 6 cover the rotation stroke of the clamping pieces 5.2, the mask body is provided with a containing cavity for containing the airflow blocking plate 5, and the containing cavity is arranged on the inner side wall of the mask body; draw-in groove 6 is a curved groove, and from the opening of draw-in groove 6 to the inside of draw-in groove 6, the size of draw-in groove 6 reduces gradually, when not using, perhaps when using blast apparatus 7, can collect in holding the intracavity by airflow baffle 5, when needs use, opens airflow baffle 5, along with airflow baffle 5's rotation, fastener 5.2 card is gone into in draw-in groove 6 to it is fixed to airflow baffle 5 formation.
In this embodiment, preferably, two ends of the airflow baffle 5 are connected to the inner side edge of the mask body through the rotating shaft 5.1, and the airflow baffle 5 rotates around the rotating shaft 5.1 to have an open state and a storage state; in an opening state, the clamping piece 5.2 is clamped into the clamping groove 6, and the airflow baffle 5 blocks the upward movement of the airflow at the lower part of the baffle; in the storage state, the airflow baffle 5 is stored in the containing cavity; correspond in the inboard of face guard body and be provided with the hole that supplies axis of rotation 5.1 to insert, be provided with location portion simultaneously on holding the chamber, location portion can be the concave-convex part, also can be the locating lever, it is provided with the locating hole to correspond on airflow baffle 5, so when collecting airflow baffle 5 in holding the chamber, location portion fixes airflow baffle 5, when needs open airflow baffle 5, through rotating airflow baffle 5, in 5.2 card income draw-in grooves 6 of fastener at airflow baffle 5 both ends, thereby form the fixed of open mode to airflow baffle 5, play and block that the air of user's exhalation from upwards flowing into on the eyewindow 2.1 down.
In this embodiment, preferably, the blowing device 7 includes a driving mechanism and an air outlet channel 7.1, the air outlet channel 7.1 includes a left air outlet channel 7.1 and a right air outlet channel 7.1, the left air outlet channel 7.1 and the right air outlet channel 7.1 are both provided with a plurality of air outlet holes 7.2, and the axes of the air outlet holes 7.2 are both perpendicular to the edge of the eye window 2.1; the eyehole 2.1 includes left eyehole 2.1 and right eyehole 2.1, left side air outlet channel 7.1 is provided with left eyehole 2.1 and goes up the side, right eyehole 2.1 sets up the side on right eyehole 2.1, all be provided with a plurality of ventholes 7.2 on left eyehole 2.1 and the right eyehole 2.1, the inlet end of venthole 7.2 is greater than the end of giving vent to anger, make the speed of air current outflow accelerate, and all gas from the outlet hole 7.2 output all blow to on the eyehole 2.1, thereby make the phenomenon that the fog can not appear in eyehole 2.1.
In this embodiment, preferably, the defogging channel 4 is further provided with an opening device, the opening device comprises a sliding member 8, the sliding member 8 comprises a sliding plate 8.1 and a connecting plate 8.2, the sliding plate 8.1 is slidably connected to the outer side surface of the mask body 1, and the connecting plate 8.2 is provided with a sealing part; the seal comprises a first seal 8.2.1 and a second seal 8.2.2; a clamping cavity 4.1 for clamping the first sealing part 8.2.1 is arranged on the demisting channel 4, and a plurality of vent holes 5.3 are arranged on the airflow baffle 5; the sliding plate 8.1 slides along the mask body 1 to have a communication state and a closed state, in the closed state, the first sealing part 8.2.1 is clamped into the clamping cavity 4.1 to close the demisting passage 4, and the second sealing part 8.2.2 covers the vent hole 5.3 to close the vent hole 5.3; in the connected state, the first seal 8.2.1 leaves the card chamber 4.1 to open the defogging channel 4 and the second seal 8.2.2 leaves the vent 5.3 to open the vent 5.3. When the airflow baffle 5 is used for preventing fogging, the situation that the effect is not obvious can occur, at the moment, the airflow baffle 5 does not need to be stored through the opening device, only the opening device needs to be in a communication state, namely the sliding piece 8 enables the first sealing part 8.2.1 to leave the clamping cavity 4.1, and the second sealing part 8.2.2 leaves the vent hole 5.3, so that the blowing device 7 can be used, and the effect of preventing fogging is more obvious.
In this embodiment, preferably, there are two sliding parts 8, which are respectively provided with the left and right sides of the mask body 1, the left and right sides of the airflow baffle 5 are both provided with the vent holes 5.3, the sealing part of the left sliding part 8.3 is provided with a first sealing part 8.2.1 and a second sealing part 8.2.2, and the sealing part of the right sliding part 8.4 is provided with a second sealing part 8.2.2. Can open and close left side air vent 5.3 and defogging passageway 4 through left slider 8.3, can open and close right side air vent 5.3 through right slider 8.4 for the gas of exporting from left air outlet channel 7.1 and right air outlet channel 7.1 exports through left side air vent 5.3 or right side air vent 5.3, so increases gaseous velocity of flow, makes antifog effect better.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and are not to be construed as limiting the scope of the invention.
Claims (2)
1. A pleasant antifog chemical experiment gas mask comprises a mask body and mask belts, wherein the mask belts are connected to the left side and the right side of the mask body;
the filter comprises an air inlet, a filter element and an air outlet, wherein the air outlet comprises a first air outlet and a second air outlet, the first air outlet is connected with a breathing channel, and the second air outlet is connected with a demisting channel;
an eye window is arranged on the eye protection part, and an air blowing device is arranged at the edge of the upper side of the eye window and communicated with the demisting channel;
the blowing device comprises a driving mechanism and an air outlet channel, the air outlet channel comprises a left air outlet channel and a right air outlet channel, a plurality of air outlet holes are formed in the left air outlet channel and the right air outlet channel, and the center point of the eye window is located on the axis of the air outlet holes;
the mask comprises a mask body, an airflow baffle plate, a mask body and a mask cover, wherein the airflow baffle plate is a circular arc-shaped plate, clamping pieces are arranged at two end parts of the airflow baffle plate, close to one side edge of the mask body, clamping grooves are correspondingly arranged on the mask body, and the clamping grooves cover the rotation strokes of the clamping pieces;
the mask body is provided with an accommodating cavity for accommodating the airflow baffle, and the accommodating cavity is arranged on the inner side wall of the mask body;
the demisting passage is also provided with an opening device, the opening device comprises a sliding piece, the sliding piece comprises a sliding plate and a connecting plate, the sliding plate is connected to the outer side surface of the mask body in a sliding manner, and the connecting plate is provided with a sealing part; the sealing part comprises a first sealing part and a second sealing part;
the demisting channel is provided with a clamping cavity for the first sealing part to be clamped in, and the airflow baffle is provided with a plurality of vent holes;
the sliding plate slides along the mask body to have a communication state and a closing state;
in the closed state, the first sealing part is clamped into the clamping cavity to close the defogging channel, and the second sealing part covers the vent hole to close the vent hole;
in the communication state, the first sealing part leaves the card cavity to open the defogging channel, and the second sealing part leaves the vent hole to open the vent hole;
the mask body is provided with a left sliding part and a right sliding part, the left side and the right side of the mask body are respectively provided with an air vent, the sealing part of the left sliding part is provided with a first sealing part and a second sealing part, and the sealing part of the right sliding part is provided with a second sealing part;
open and close left side air vent and defogging passageway through left slider, open and close right side air vent through right slider for the gas of giving vent to anger passageway from a left side and the output of right passageway of giving vent to anger is through left side air vent and right side air vent output, increases gaseous velocity of flow, makes antifog effect better.
2. The pleasant anti-fog chemical experiment gas mask as claimed in claim 1, wherein both ends of the airflow baffle are connected to the inner side edge of the mask body through a rotating shaft, and the airflow baffle rotates around the rotating shaft to have an open state and a storage state;
in the opening state, the clamping piece is clamped in the clamping groove, and the airflow baffle plate blocks the upward movement of the airflow at the lower part of the baffle plate;
in the storage state, the airflow baffle is stored in the containing cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711194749.4A CN107899151B (en) | 2017-11-24 | 2017-11-24 | Pleasant anti-fog chemical experiment gas mask |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711194749.4A CN107899151B (en) | 2017-11-24 | 2017-11-24 | Pleasant anti-fog chemical experiment gas mask |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107899151A CN107899151A (en) | 2018-04-13 |
| CN107899151B true CN107899151B (en) | 2023-04-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711194749.4A Active CN107899151B (en) | 2017-11-24 | 2017-11-24 | Pleasant anti-fog chemical experiment gas mask |
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| Country | Link |
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| CN (1) | CN107899151B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0363530A1 (en) * | 1987-04-06 | 1990-04-18 | Cam Lock (Uk) Ltd | Respirator |
| US20040226563A1 (en) * | 2003-05-12 | 2004-11-18 | Zhaoxia Xu | Face Mask with Double Breathing Chambers |
| US20050036100A1 (en) * | 2003-08-14 | 2005-02-17 | Npf Limited | Goggles |
| CN1633315A (en) * | 2002-02-16 | 2005-06-29 | 英国国防部 | Respirators |
| US6920880B1 (en) * | 2004-07-06 | 2005-07-26 | Justin W. Zahrt | Mask defogging system and method |
| CN1933875A (en) * | 2004-03-19 | 2007-03-21 | 斯科特安全健康有限公司 | Respirators |
| KR20140048512A (en) * | 2012-10-16 | 2014-04-24 | 이효철 | Full face shield |
| CN205549276U (en) * | 2016-04-29 | 2016-09-07 | 刘建国 | Positive pressure air respirator and face guard with defrosting function |
-
2017
- 2017-11-24 CN CN201711194749.4A patent/CN107899151B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0363530A1 (en) * | 1987-04-06 | 1990-04-18 | Cam Lock (Uk) Ltd | Respirator |
| CN1633315A (en) * | 2002-02-16 | 2005-06-29 | 英国国防部 | Respirators |
| US20040226563A1 (en) * | 2003-05-12 | 2004-11-18 | Zhaoxia Xu | Face Mask with Double Breathing Chambers |
| US20050036100A1 (en) * | 2003-08-14 | 2005-02-17 | Npf Limited | Goggles |
| CN1933875A (en) * | 2004-03-19 | 2007-03-21 | 斯科特安全健康有限公司 | Respirators |
| US6920880B1 (en) * | 2004-07-06 | 2005-07-26 | Justin W. Zahrt | Mask defogging system and method |
| KR20140048512A (en) * | 2012-10-16 | 2014-04-24 | 이효철 | Full face shield |
| CN205549276U (en) * | 2016-04-29 | 2016-09-07 | 刘建国 | Positive pressure air respirator and face guard with defrosting function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107899151A (en) | 2018-04-13 |
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Inventor after: Zhang Chengru Inventor after: Wang Qingzhou Inventor before: Zhang Chengru |
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