CN204380018U - A kind of electronic gauze mask of the plastic seal with air extraction structure and treatment facilities - Google Patents

A kind of electronic gauze mask of the plastic seal with air extraction structure and treatment facilities Download PDF

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Publication number
CN204380018U
CN204380018U CN201420858220.3U CN201420858220U CN204380018U CN 204380018 U CN204380018 U CN 204380018U CN 201420858220 U CN201420858220 U CN 201420858220U CN 204380018 U CN204380018 U CN 204380018U
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China
Prior art keywords
container cavity
extraction structure
treatment facilities
inner casing
air extraction
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Expired - Fee Related
Application number
CN201420858220.3U
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Chinese (zh)
Inventor
刘冬梅
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Desay Austria Intelligent Technology (beijing) Co Ltd
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Desay Austria Intelligent Technology (beijing) Co Ltd
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Priority to CN201420858220.3U priority Critical patent/CN204380018U/en
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Expired - Fee Related legal-status Critical Current
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Abstract

The utility model relates to a kind of electronic gauze mask of the plastic seal with air extraction structure and treatment facilities, it comprises housing, described housing comprises the shell and inner casing that cooperatively interact, it is outside that described shell is located at described inner casing, the first container cavity is formed between the inwall of described shell and the outer wall of described inner casing, described shell is provided with the first air inlet be in communication with the outside for described first container cavity, along airintake direction, is provided with treatment facilities and air extraction structure successively in described first container cavity; The inner side of described inner casing is provided with the second container cavity holding mouth and nose, and the corresponding described air extraction structure of described inner casing is provided with the second air inlet being communicated with described first container cavity and described second container cavity, and described inner casing is provided with gas outlet in the part of described shell edge; Extraneous gas enters described first container cavity through described first air inlet of described shell, after described treatment facilities and air extraction structure, enters described second container cavity for people's incoming call by the second air inlet of described inner casing; The gas of breathing out is discharged by the described gas outlet of described inner casing.

Description

A kind of electronic gauze mask of the plastic seal with air extraction structure and treatment facilities
Technical field
The utility model belongs to mouth mask field, is specifically related to a kind of electronic gauze mask of the plastic seal with air extraction structure and treatment facilities.
Background technology
Mouth mask can be divided into air filtering type mask and Gas feeding mouth mask, mouth mask designs in order to the health of people, filter for stoping visible or sightless material harmful in air, existing filter-type respirator has multiple on the market, mainly comprise laminates mouth mask, non-woven fabrics gauze mask and the mouth mask etc. with activated carbon filter layer.Laminates mouth mask as filtrate mouth mask in the past always adopt by people, but along with air pollution is more and more serious, a kind of fine particle thing is detected in air, namely PM2.5, no matter how how multilayer lint face mask is done, and at most also can only filter the finely ground particles of more than 5 microns, not have defense reaction completely to PM2.5, in order to the defense reaction played, non-woven fabrics gauze mask and the mouth mask with activated carbon filter layer are there is on the market.
Existing electronic gauze mask has multiple on the market, mainly non-woven fabrics adds melt-blown material and cloth adds activated carbon filter screen two kinds, these two kinds of mouth masks have the effect of obstruct to dust and PM2.5, but dust proof rate and smooth breathing rate are but the critical defects of this mouth mask, in order to reach the effect of resistance dirt, often there is the phenomenon of unsmooth breath in non-woven fabrics gauze mask and active carbon mask, namely breathes the phenomenon occurring feeling oppressed.In addition also there is the problem of carrying inconvenience etc. in current existing mouth mask.
Utility model content
In order to solve the problems referred to above that prior art exists, the utility model provides good filtration effect, breathe the electronic gauze mask of a kind of plastic seal with air extraction structure and treatment facilities smooth and easy and easy to carry.
The technical scheme that the utility model adopts is:
A kind of electronic gauze mask of the plastic seal with air extraction structure and treatment facilities, it comprises housing, described housing comprises the shell and inner casing that cooperatively interact, it is outside that described shell is located at described inner casing, the first container cavity is formed between the inwall of described shell and the outer wall of described inner casing, described shell is provided with the first air inlet be in communication with the outside for described first container cavity, along airintake direction, is provided with treatment facilities and air extraction structure successively in described first container cavity; The inner side of described inner casing is provided with the second container cavity holding mouth and nose, and the corresponding described air extraction structure of described inner casing is provided with the second air inlet being communicated with described first container cavity and described second container cavity, and described inner casing is provided with gas outlet in the part of described shell edge; Extraneous gas enters described first container cavity through described first air inlet of described shell, after described treatment facilities and air extraction structure, enters described second container cavity for people's incoming call by the second air inlet of described inner casing; The gas of breathing out is discharged by the described gas outlet of described inner casing.
Adopt said structure, extraneous gas, under the effect of described air extraction structure, enters in described first container cavity by described first air inlet, enters the second container cavity again, breathe for people after described treatment facilities filters by described second air inlet.Gas wherein after treatment facilities filtration, greatly can improve the clean-up effect of PM2.5, and air extraction structure can ensure the smooth and easy of air inlet, reduce the resistance of air-breathing, people can not be made to occur the phenomenon of feeling suffocated.The gas of breathing out then is discharged by the described gas outlet of described inner casing.Therefore in the utility model, the flow direction of gas is one-way, can increase the utilization rate of gas, improves utilization rate of the present utility model.In addition, due to compact of the present utility model, be easy to carry.
Preferably, described electronic gauze mask also comprises power supply architecture, described power supply architecture be built-in power and or external power supply.When arranging separately built-in power or external power supply, built-in power is convenient for carrying, and not by the impact in time and geographical position, but there is the defect of electricity deficiency, and external power supply can continued power, but there is the defect of not Portable belt; When built-in power and external power supply are arranged simultaneously, can be complementary not enough.
Preferably, described built-in power is installed in described first container cavity; Described built-in power is by switch control rule, and described switch is fixed on described shell, and one end of described switch is positioned at the inner side of described first container cavity, and the other end of described switch is positioned at the outside of described first container cavity.Built-in power is installed in the first container cavity, directly with human body or extraneous contact, safe attractive in appearance again; By the control of switch, can increase whether use selective, the position of switch, can handled easily.
Preferably, described HEPA screen pack is connected with described air extraction structure by gland.Structure is simple, and installation and removal are convenient.
Preferably, described shell is provided with protecgulum at the outer circumferential side of described first air inlet.Can protect the first air inlet, reduce the first air inlet and be subject to unnecessary damage, and if protecgulum damage, also by only changing protecgulum, need not shell be changed, reducing use cost, improve the utilization rate of resource.
Further, the quantity of described first air inlet is multiple, and multiple described first air inlet distributes as net shape, and described protecgulum is provided with several through holes, and the diameter of described through hole is less than the diameter of described first air inlet.This kind is arranged, the object of protecgulum to larger volume can be made to have certain filtering function, the object of larger volume is blocked in outside mouth mask, reduce the workload of described treatment facilities in described first container cavity, the utilization rate of effective raising treatment facilities and service life, ensure the filter effect for the treatment of facilities.
Preferably, the quantity of described second air inlet is multiple, and the corresponding described air extraction structure of multiple described second air inlets is circumferentially uniformly distributed.Quantity due to the second air inlet is multiple, comparing quantity is one, can reduce the size of each second air inlet, and the gas entered in described second container cavity is uniformly distributed, too large gas shock can not be caused to face, thus cause the discomfort of face.
Preferably, the quantity of described gas outlet is two, is symmetrically set in the both sides described inner casing being positioned at face; Each described gas outlet is equipped with check valve.The quantity of residing gas outlet is set to two, and is symmetrically set in the both sides described inner casing being positioned at face, is position according to the nose of human body and arranges, making the gas of characteristics of contaminated respiratory droplets have the structure of discharge in the both sides of described inner casing, improve the speed that gas is discharged.And by the setting of check valve, can make the gas of exhalation can only one-way flow, namely can only flow out the second container cavity, and the gas in the external world not enter the second container cavity by described gas outlet, therefore, it is possible to ensure the gas of human body incoming call, to greatest extent through the filtration for the treatment of facilities.
Preferably, the position that all sides are contacting with face of described second container cavity is provided with silica gel sealing ring.Because the sealing of silica gel sealing ring is better, therefore in the utility model, one of them effect of silica gel sealing ring is the air-tightness increasing the utility model mouth mask, another effect is because the elasticity of silica gel sealing ring is better, contacts, can improve the comfortableness of face with face.
Described electronic gauze mask also comprises the fixed structure fixing with head.Fixed structure can increase other parts of electronic gauze mask and the stationarity of head, wears conveniently, also avoids the landing of electronic gauze mask.
Described fixed structure comprises a pair hanging button, and hanging button described in a pair is symmetrically set in the two ends outside described inner casing, and each described hanging button is equipped with fixed band.Fixed band can be fixed on the positions such as the head of human body or ear during use, be not easy because the reasons such as wind drop.By the mode of hanging button, replacing and the cleaning of fixed band can be facilitated.Fixed band can be one, and the two ends of fixed band are connected with a hanging button respectively, when use, directly can be set to head; Fixed band also can be two, and every bar fixed band is connected with a hanging button respectively, during use, is connected by the free end of two fixed bands.Fixed band can be bandage or VELCRO etc.
Described air extraction structure is one or more the combination in fan, blower fan and aspiration pump.As long as extraneous gas can be made by air extraction structure, enter described first container cavity from described first air inlet of described shell, after described treatment facilities, enter described second container cavity for people's incoming call by the second air inlet of described inner casing; Be not limited to the use of fan, blower fan and aspiration pump.Fan is preferably aerofoil fan.Flow direction due to the gas of employing aerofoil fan is the axis of axial flow air extraction structure, therefore, it is possible to make to enter the gas in described first container cavity, maximum is filtered by treatment facilities, improves the filter effect for the treatment of facilities.
Described treatment facilities be screen pack and or clarifier.The effect of described treatment facilities, after gas to external world processes, can provide quality good gas for people breathes, by filter screen filtration, also purify by clarifier, filter and clarifier can also be used simultaneously.
Described screen pack be HEPA high efficiency particulate air and or activated charcoal strainer.HEPA (High efficiencyparticulate air Filter), the Chinese meaning is high efficiency particle air filter, reach the screen pack of HEPA standard, 99.7% is reached for the efficient of 0.1 micron and 0.3 micron, the feature of HEPA high efficiency particulate air is that air can pass through, but tiny particulate cannot pass through.It can reach more than 99.97% to the particle removal efficiency that diameter is more than 0.3 micron (1/200 of hair diameter), is the most effective filtering mediums of pollutant such as smog, dust and bacterium.Activated charcoal strainer has excellent aerodynamics performance, and bulk density is little, and specific area is large, adsorption efficiency is high, and air resistance coefficient is little.Can deodorizing under certain air quantity, eliminate the unusual smell, environment purification, has good clean-up effect.HEPA high efficiency particulate air and activated charcoal strainer can be used alone, and also can use simultaneously or use other composite filter net.
The beneficial effects of the utility model are: axial flow air extraction structure and treatment facilities are applied in mouth mask by the utility model, by the housing of mouth mask being arranged to the mode that shell and inner casing match, axial flow air extraction structure and treatment facilities are organically combined, treatment facilities can filter gas, greatly improve the clean-up effect of PM2.5, air extraction structure can ensure the smooth and easy of air inlet, reduces the resistance of air-breathing, people can not be made to occur the phenomenon of feeling suffocated.
Accompanying drawing explanation
Fig. 1 be the electronic gauze mask of a kind of plastic seal with air extraction structure and treatment facilities of the utility model face structural representation;
Fig. 2 is the profile of A-A in Fig. 1;
Fig. 3 is the structure schematic diagram of the electronic gauze mask of a kind of plastic seal with air extraction structure and treatment facilities of the utility model.
In figure: 1, housing; 11, shell; 111, the first air inlet; 12, inner casing; 121, the second container cavity; 122, the second air inlet; 123, gas outlet; 124, check valve; 2, protecgulum; 3, silica gel sealing ring; 4, hanging button; 5, the first container cavity; 51, treatment facilities; 52, air extraction structure; 53, gland; 54, built-in power; 55, switch.
Detailed description of the invention
As shown in one of Fig. 1-3, the utility model provides a kind of electronic gauze mask of the plastic seal with air extraction structure and treatment facilities, and it comprises housing 1, protecgulum 2, silica gel sealing ring 3, fixed structure; Described housing 1 comprises the shell 11 and inner casing 12 that cooperatively interact, and it is outside that described shell 11 is snapped in inner casing 12.
The first container cavity 5 is formed between the inwall of described shell 11 and the outer wall of described inner casing 12, described shell 11 is provided with the first air inlet 111 be in communication with the outside for described first container cavity 5, and described shell 11 is provided with protecgulum 2 in outer all sides of described first air inlet 111; Along airintake direction, be provided with treatment facilities 51 and air extraction structure 52 successively in described first container cavity 5, described treatment facilities 51 is connected with described air extraction structure 52 by gland 53; Described air extraction structure 52 is one or more the combination in fan, blower fan and aspiration pump.As long as extraneous gas can be made by air extraction structure 52, described first container cavity 5 is entered from described first air inlet 111 of described shell 11, after described treatment facilities 51, enter described second container cavity 121 for people's incoming call by the second air inlet 122 of described inner casing 12; Be not limited to the use of fan, blower fan and aspiration pump.Fan is preferably aerofoil fan.Because the flow direction of the gas adopting aerofoil fan is the axis of aerofoil fan, therefore, it is possible to make to enter the gas in described first container cavity 5, maximum is filtered by treatment facilities 51, improves the filter effect for the treatment of facilities 1.Described treatment facilities 51 be screen pack and or clarifier.The effect of described treatment facilities 1, after gas to external world processes, can provide quality good gas for people breathes, by filter screen filtration, also purify by clarifier, filter and clarifier can also be used simultaneously.Described screen pack be HEPA high efficiency particulate air and or activated charcoal strainer.
In addition, described electronic gauze mask also comprises power supply architecture, described power supply architecture be built-in power 54 and or external power supply.Described built-in power 54 is installed in described first container cavity 5; The break-make of described air extraction structure 52 and described built-in power 54 is controlled by switch 55, described switch 55 is fixed on described shell 11, and one end of described switch 55 is positioned at described first container cavity 5, the other end of described switch 55 is positioned at the outside of described first container cavity 5; Described power supply architecture provides electric energy for needing the structure of powering in mouth mask.
The inner side of described inner casing 12 is provided with the second container cavity 121 holding mouth and nose, the corresponding described air extraction structure 52 of described inner casing 12 is provided with the second air inlet 122 being communicated with described first container cavity 5 and described second container cavity 121, and described inner casing 12 is provided with gas outlet 123 in the part at described shell 11 edge; All sides of described second container cavity 121 are provided with silica gel sealing ring 3 at the position contacted with face.In addition, described electronic gauze mask also comprises the fixed structure fixing with head.Described fixed structure comprises a pair hanging button 4, and hanging button 4 described in a pair is symmetrically set in the two ends outside described inner casing 12, and each described hanging button 4 is equipped with fixed band.Fixed band can be fixed on the positions such as the head of human body or ear during use, be not easy because the reasons such as wind drop.Fixed band can be one, and the two ends of fixed band are connected with a hanging button respectively, when use, directly can be set to head; Fixed band also can be two, and every bar fixed band is connected with a hanging button respectively, during use, is connected by the free end of two fixed bands.Fixed band can be bandage or VELCRO etc.
The two ends in the outside of described inner casing 12 are arranged with a pair hanging button 4, and described in a pair, hanging button 4 is connected with the two ends of fixed band respectively.
Extraneous gas enters described first container cavity 5 through described first air inlet 111 of described shell 11, after described treatment facilities 51 and air extraction structure 52, enters described second container cavity 121 for people's incoming call by the second air inlet 122 of described inner casing 12; The gas of breathing out is discharged by the described gas outlet 123 of described inner casing 12.
Adopt said structure, under the effect of the described air extraction structure 52 of extraneous gas, enter in described first container cavity 5 by described first air inlet 111, after described treatment facilities 51 filters, enter the second container cavity 121 by described second air inlet 122 again, breathe for people.Gas wherein after treatment facilities 51 filtration, greatly can improve the clean-up effect of PM2.5, and air extraction structure 52 can ensure the smooth and easy of air inlet, reduce the resistance of air-breathing, people can not be made to occur the phenomenon of feeling suffocated.The gas of breathing out then is discharged by the described gas outlet 123 of described inner casing 12.Therefore in the utility model, the flow direction of gas is one-way, can increase the utilization rate of gas, improves utilization rate of the present utility model.In addition, due to compact of the present utility model, be easy to carry.Flow direction due to the gas of employing axial flow air extraction structure is the axis of axial flow air extraction structure, therefore, it is possible to make to enter the gas in described first container cavity 5, maximum is filtered by treatment facilities 51, improves the filter effect for the treatment of facilities 51.Described air extraction structure 52 is powered by built-in power, and air extraction structure 52 can be made not to be subject to the impact in time and geographical position, practical and convenient.And pass through the control of switch 55, then can increase whether use selective.Protecgulum 2 can protect the first air inlet 111, reduces the first air inlet 111 and is subject to unnecessary damage, and if protecgulum 2 damage, also by only changing protecgulum 2, shell 11 need not be changed, reducing use cost, improve the utilization rate of resource.Because the sealing of silica gel sealing ring 3 is better, therefore in the utility model, one of them effect of silica gel sealing ring 3 is the air-tightness increasing the utility model mouth mask, another effect is because the elasticity of silica gel sealing ring 3 is better, contacts, can improve the comfortableness of face with face.By the setting of hanging button 4 and fixed band, the stationarity of the utility model mouth mask can be increased.Fixed band can be fixed on the positions such as the head of human body or ear during use, be not easy because the reasons such as wind drop.
Preferably, the quantity of described first air inlet 111 is multiple, and multiple described first air inlet 111 distributes as net shape, and described protecgulum 2 is provided with several through holes 21, and the diameter of described through hole 21 is less than the diameter of described first air inlet 111.This kind is arranged, the object of protecgulum 2 pairs of larger volumes can be made to have certain filtering function, the object of larger volume is blocked in outside mouth mask, reduce the workload of described treatment facilities 51 in described first container cavity 5, the utilization rate of effective raising treatment facilities 51 and service life, ensure the filter effect for the treatment of facilities 51.
Preferably, the quantity of described second air inlet 122 is multiple, and the corresponding described air extraction structure 52 of multiple described second air inlet 122 is circumferentially uniformly distributed.Quantity due to the second air inlet 122 is multiple, comparing quantity is one, can reduce the size of each second air inlet 122, and the gas entered in described second container cavity 1212 is uniformly distributed, too large gas shock can not be caused to face, thus cause the discomfort of face.
Preferably, the quantity of described gas outlet 123 is two, is symmetrically set in the both sides described inner casing 12 being positioned at face; Each described gas outlet 123 is equipped with check valve 124.The quantity of residing gas outlet 123 is set to two, and be symmetrically set in the both sides described inner casing 12 being positioned at face, be position according to the nose of human body and arrange, making the gas of characteristics of contaminated respiratory droplets have the structure of discharge in the both sides of described inner casing 12, improving the speed that gas is discharged.And pass through the setting of check valve 124, can make the gas of exhalation can only one-way flow, namely the second container cavity 121 can only be flowed out, and the gas in the external world does not enter the second container cavity 121 by described gas outlet 123, therefore, it is possible to ensure the gas of human body incoming call, to greatest extent through the filtration for the treatment of facilities 51.
Mouth mask of the present utility model, wherein built-in power 54 can be dry cell or rechargeable lithium battary; Housing 1 is that plastic material is shaping, is that plasticity is good, is convenient to shaping, and plastic material is relative to iron, stainless steel and other metal materials poor thermal conductivity in addition, under the environment that temperature is lower or higher, user can not be made to produce sense of discomfort because the cost of plastic material is low.
The utility model is not limited to above-mentioned preferred forms; anyone can draw other various forms of products under enlightenment of the present utility model; no matter but any change is done in its shape or structure; every have identical with the application or akin technical scheme, all drops within protection domain of the present utility model.

Claims (10)

1. the electronic gauze mask with the plastic seal of air extraction structure and treatment facilities, it is characterized in that: it comprises housing, described housing comprises the shell and inner casing that cooperatively interact, it is outside that described shell is located at described inner casing, the first container cavity is formed between the inwall of described shell and the outer wall of described inner casing, described shell is provided with the first air inlet be in communication with the outside for described first container cavity, along airintake direction, is provided with treatment facilities and air extraction structure successively in described first container cavity; The inner side of described inner casing is provided with the second container cavity holding mouth and nose, and the corresponding described air extraction structure of described inner casing is provided with the second air inlet being communicated with described first container cavity and described second container cavity, and described inner casing is provided with gas outlet in the part of described shell edge; Extraneous gas enters described first container cavity through described first air inlet of described shell, after described treatment facilities and air extraction structure, enters described second container cavity for people's incoming call by the second air inlet of described inner casing; The gas of breathing out is discharged by the described gas outlet of described inner casing.
2. the electronic gauze mask of a kind of plastic seal with air extraction structure and treatment facilities according to claim 1, is characterized in that: it also comprises power supply architecture, described power supply architecture be built-in power and or external power supply.
3. the electronic gauze mask of a kind of plastic seal with air extraction structure and treatment facilities according to claim 2, is characterized in that: described built-in power is installed in described first container cavity; Described built-in power is by switch control rule, and described switch is fixed on described shell, and one end of described switch is positioned at the inner side of described first container cavity, and the other end of described switch is positioned at the outside of described first container cavity.
4. the electronic gauze mask of a kind of plastic seal with air extraction structure and treatment facilities according to claim 1, is characterized in that: described treatment facilities is connected with described air extraction structure by gland.
5. the electronic gauze mask of a kind of plastic seal with air extraction structure and treatment facilities according to claim 1, is characterized in that: described shell is provided with protecgulum at the outer circumferential side of described first air inlet; The quantity of described first air inlet is multiple, and multiple described first air inlet distributes as net shape, and described protecgulum is provided with several through holes, and the diameter of described through hole is less than the diameter of described first air inlet; The quantity of described second air inlet is multiple, and the corresponding described air extraction structure of multiple described second air inlets is circumferentially uniformly distributed.
6. the electronic gauze mask of a kind of plastic seal with air extraction structure and treatment facilities according to claim 1, is characterized in that: the quantity of described gas outlet is two, is symmetrically set in the both sides described inner casing being positioned at face; Each described gas outlet is equipped with check valve.
7. the electronic gauze mask of a kind of plastic seal with air extraction structure and treatment facilities according to claim 1, is characterized in that: the position that all sides are contacting with face of described second container cavity is provided with silica gel sealing ring.
8. the electronic gauze mask of a kind of plastic seal with air extraction structure and treatment facilities according to claim 1, is characterized in that: it also comprises the fixed structure fixing with head; Described fixed structure comprises a pair hanging button, and hanging button described in a pair is symmetrically set in the two ends outside described inner casing, and each described hanging button is equipped with fixed band.
9., according to the electronic gauze mask of a kind of plastic seal with air extraction structure and treatment facilities one of claim 1-8 Suo Shu, it is characterized in that: described air extraction structure is one or more the combination in fan, blower fan and aspiration pump.
10., according to the electronic gauze mask of a kind of plastic seal with air extraction structure and treatment facilities one of claim 1-8 Suo Shu, it is characterized in that: described treatment facilities be screen pack and or clarifier.
CN201420858220.3U 2014-12-30 2014-12-30 A kind of electronic gauze mask of the plastic seal with air extraction structure and treatment facilities Expired - Fee Related CN204380018U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420858220.3U CN204380018U (en) 2014-12-30 2014-12-30 A kind of electronic gauze mask of the plastic seal with air extraction structure and treatment facilities

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420858220.3U CN204380018U (en) 2014-12-30 2014-12-30 A kind of electronic gauze mask of the plastic seal with air extraction structure and treatment facilities

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Publication Number Publication Date
CN204380018U true CN204380018U (en) 2015-06-10

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107890615A (en) * 2017-05-25 2018-04-10 苏州风享环保科技有限公司 A kind of multifunctional modular air purifier
CN108208974A (en) * 2018-02-16 2018-06-29 牟小林 A kind of medical convection current mask

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107890615A (en) * 2017-05-25 2018-04-10 苏州风享环保科技有限公司 A kind of multifunctional modular air purifier
CN108208974A (en) * 2018-02-16 2018-06-29 牟小林 A kind of medical convection current mask
CN108208974B (en) * 2018-02-16 2019-08-20 吉林大学 A kind of medical convection current mask

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Granted publication date: 20150610

Termination date: 20181230