CN111084940B - Micro-positive pressure protective hood capable of changing wind direction - Google Patents
Micro-positive pressure protective hood capable of changing wind direction Download PDFInfo
- Publication number
- CN111084940B CN111084940B CN202010091479.XA CN202010091479A CN111084940B CN 111084940 B CN111084940 B CN 111084940B CN 202010091479 A CN202010091479 A CN 202010091479A CN 111084940 B CN111084940 B CN 111084940B
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- valve core
- ring structure
- wind direction
- core part
- hood body
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- 230000001681 protective effect Effects 0.000 title claims abstract description 31
- 230000029058 respiratory gaseous exchange Effects 0.000 claims abstract description 21
- 238000001914 filtration Methods 0.000 claims abstract description 19
- 230000000670 limiting effect Effects 0.000 claims description 18
- 239000012528 membrane Substances 0.000 claims description 6
- 239000004745 nonwoven fabric Substances 0.000 description 4
- 229920000742 Cotton Polymers 0.000 description 3
- 206010011985 Decubitus ulcer Diseases 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 208000004210 Pressure Ulcer Diseases 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000007373 indentation Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 206010011409 Cross infection Diseases 0.000 description 1
- 206010029803 Nosocomial infection Diseases 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B7/00—Respiratory apparatus
- A62B7/10—Respiratory apparatus with filter elements
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
- A62B18/02—Masks
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
- A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B9/00—Component parts for respiratory or breathing apparatus
- A62B9/02—Valves
Landscapes
- Health & Medical Sciences (AREA)
- Pulmonology (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Life Sciences & Earth Sciences (AREA)
- Zoology (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
The micro-positive pressure protective hood capable of changing wind direction comprises a hood body, wherein a window is arranged at the front part of the hood body, a tightening and fixing device is arranged at the lower part of the hood body, an air supply device is arranged outside the hood body, a wind direction changing device is arranged in the hood body, a breathing tube is arranged between the wind direction changing device and the air supply device, and the wind direction changing device is communicated with the air supply device through the breathing tube; the hood body is also provided with an exhaust filtering device. According to the invention, the filtered air enters the wind direction changing device to be redirected, the space between the upper cover and the lower cover forms an air flow space, the space between the adjacent flow dividing plates forms an air outlet, the filtered air is dispersed to the air flow space through the arc-shaped structure and then flows out of the air outlet, so that the situation that the air directly enters the protective hood, and the position of a medical staff opposite to the air inlet of the protective hood is always in a blown state is avoided, and the comfort level of the protective hood is improved.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a micro-positive pressure protective hood capable of changing wind direction.
Background
At present, in order to protect the medical staff, most of the medical staff wear a mask or are protected by goggles, the protection is relatively limited, such as the head, the ears and other parts cannot be protected, the wearing is complicated, and the problems of pressure sores, pressure marks and the like on the face of the medical staff are easy to occur; the traditional protective clothing putting on and taking off process is complicated, the time consumption is long, and the whole body is in the protective clothing, so that the protective clothing is stuffy.
Therefore, the protective hood is formed, the air supply device is arranged outside the protective hood and generally comprises a motor, a fan, a primary filter device, a lithium battery, a circuit board and the like, the air supply device is used for supplying air into the protective hood, the air directly enters the protective hood, the position, opposite to the air inlet of the protective hood, of medical staff is always in a blown state, and the comfort level of the protective hood is poor.
Disclosure of Invention
The invention aims at: the utility model provides a can change the micro-positive pressure protective hood of wind direction, solves above-mentioned air and directly enters into in the protective hood, leads to medical personnel's the position relative with protective hood air intake to be in the state of being bloied always, leads to the poor technical problem of comfort level of protective hood.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the micro-positive pressure protective hood capable of changing wind direction comprises a hood body, wherein a window is arranged at the front part of the hood body, a tightening and fixing device is arranged at the lower part of the hood body, an air supply device is arranged outside the hood body, a wind direction changing device is arranged in the hood body, a breathing tube is arranged between the wind direction changing device and the air supply device, and the wind direction changing device is communicated with the air supply device through the breathing tube; the hood body is also provided with an exhaust filtering device.
The wind direction changing device comprises an upper cover and a lower cover, a connecting column is fixedly connected between the upper cover and the lower cover, a plurality of splitter plates are arranged between the upper cover and the lower cover at intervals, an inward protruding arc-shaped structure is arranged in the middle of the upper cover, and the lower cover is communicated with the breathing tube.
The splitter plate is arranged along the circumferential direction of the edge of the end face of the lower cover; one end of the flow dividing plate is fixed on the lower cover, and the other end of the flow dividing plate is contacted with the upper cover.
One end of the connecting column is fixed on the lower cover, the upper cover is provided with a mounting hole corresponding to the connecting column, and the other end of the connecting column is assembled into the mounting hole and fixed in the mounting hole.
The wind direction changing device is arranged on the same side as the window and below the window; the lower cover is vertically fixed on the head cover body.
One side of the lower cover, which is away from the upper cover, is provided with a convex column, a second through hole is arranged in the convex column, and the convex column is detachably and fixedly connected with the breathing tube.
And a one-way valve is arranged in the second through hole.
The one-way valve comprises a valve seat and a valve core, the valve core is arranged on the valve seat, and the valve seat is arranged in the second through hole; the valve seat comprises an outer ring structure, an inner ring structure is arranged in the outer ring structure, and a plurality of connecting ribs which are arranged at intervals are fixedly connected between the outer ring structure and the inner ring structure; the valve core comprises a valve core column, one end of the valve core column is provided with an elastic baffle plate, the valve core column is arranged in the inner ring structure and matched with the inner ring structure, and the inner side surface of the baffle plate is attached to the end surface of the outer ring structure.
The valve core column comprises a first valve core part, a second valve core part and a third valve core part which are sequentially arranged, the outer diameter of the second valve core part is larger than that of the first valve core part and that of the third valve core part, the second valve core part is in interference fit with the inner ring structure, the second valve core part is longer than the inner ring structure, the difference between the length of the second valve core part and the length of the inner ring structure is recorded as L, and the range of L is 0.3 mm-0.5 mm; the inner side surface of the baffle plate is contacted with the end surface of the inner ring structure; a conical limiting block is arranged between the first valve core part and the second valve core part, and one end, close to the baffle, of the limiting block is larger than one end, deviating from the baffle, of the limiting block; the periphery of the valve seat is provided with a plurality of protruding rings which are arranged at intervals, the protruding rings are in interference fit with the second through holes, limiting rings are arranged in the second through holes, and the limiting rings are in contact with the protruding rings close to the baffle plates.
The exhaust filtering device comprises an exhaust hole arranged on the head cover body, and a filtering membrane is arranged at the exhaust hole; the tightening and fixing device is an elastic belt.
The invention can carry out omnibearing protection on the head of medical staff without wearing a mask and goggles, thereby avoiding pressure sores and indentations on the face of the medical staff, increasing the comfort of the medical staff, leading a primary filtering device in an air supply device to carry out primary filtration on air, leading the filtered air to enter a wind direction changing device for redirection, leading the space between an upper cover and a lower cover to form an air flow space, leading the space between adjacent flow dividing plates to form an air outlet, leading the filtered air to be dispersed into the air flow space through an arc structure and then to flow out from the air outlet, avoiding that the air directly enters a protective hood, leading the position of the medical staff opposite to an air inlet of the protective hood to be always in a blown state, and improving the comfort of the protective hood; the one-way valve can enable air in the wind direction changing device to flow unidirectionally, when the air supply device works, air subjected to primary filtration enters the second through hole through the breathing tube and then enters the interval between the outer ring structure and the inner ring structure to push the baffle plate, the baffle plate deforms outwards, so that the one-way valve is opened, and the air is redirected through the wind direction changing device; when the air supply device is damaged or is not powered, the one-way valve is closed, so that the air mixed with impurities, bacteria, viruses and the like is prevented from entering the hood。
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a partial cross-sectional view of the present invention;
FIG. 3 is a schematic view of a wind direction changing device;
FIG. 4 is a schematic view of a wind direction changing apparatus;
FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4;
FIG. 6 is a schematic view of the structure of the lower cover;
FIG. 7 is a schematic view of the structure of the upper cover;
FIG. 8 is a cross-sectional view taken along line C-C of FIG. 7;
FIG. 9 is a schematic view of the one-way valve in a closed state;
FIG. 10 is a schematic view of the one-way valve in an open state;
FIG. 11 is a schematic structural view of a valve cartridge;
fig. 12 is a schematic structural view of the valve seat.
Detailed Description
As shown in fig. 1 to 12, a micro-positive pressure protective hood capable of changing wind direction comprises a hood body 1, wherein a window 7 is arranged at the front part of the hood body 1, a transparent pe sheet is adopted for the window 7, the window 7 is fixedly connected with the hood body 1, a large window is preferentially adopted, the whole face of medical staff can be displayed, the medical staff can observe conveniently, a tightening fixing device 4 is arranged at the lower part of the hood body 1, a wind direction changing device 3 is arranged outside the hood body 1, a primary filtering device is arranged in the wind direction changing device 3, the wind direction changing device 3 further comprises a motor, a fan, a lithium battery and a circuit board, the lithium battery supplies power for the circuit board, the motor controls the motor to work, the fan drives the fan to work, the fan sucks air and filters the air through the primary filtering device, the air is not repeated in the prior art, in addition, the wind direction changing device 3 can adopt an electric wind direction breathing system sold in various markets, as shown in fig. 2, the wind direction changing device 5 is arranged in the hood body 1, the wind direction changing device 5 is preferentially observed conveniently, the wind direction changing device 5 is fixedly connected in the hood body 1, the wind direction changing device 3 is arranged in a split track in fig. 2, and the wind direction changing device 5 is preferentially, and the wind direction changing device 5 is communicated with the breathing tube 3 through the wind direction changing device 2; the hood body 1 is also provided with an exhaust filtering device 6.
The wind direction changing device 5 comprises an upper cover 51 and a lower cover 58, a connecting column 53 is fixedly connected between the upper cover 51 and the lower cover 58, a plurality of flow dividing plates 55 are arranged between the upper cover 51 and the lower cover 58 at intervals, an inward-protruding arc-shaped structure 52 is arranged in the middle of the upper cover 51, the edge of the upper cover 51 is flat, the whole upper cover 51 is approximately hat-shaped, and the lower cover 58 is communicated with the breathing tube 2.
The splitter plate 55 is arranged along the circumferential direction of the end surface edge of the lower cover 58, and the splitter plate 55 is a cuboid plate or an arc plate with an opening pointing to the center of the end surface of the lower cover 58 or other shapes playing a role in spacing; one end of the flow dividing plate 55 is fixed on the lower cover 58, and the other end of the flow dividing plate 55 is in contact with the upper cover 51, and the flow dividing plate 55 plays a role in both flow dividing and supporting.
One end of the connection post 53 is fixed to the lower cover 58, and the upper cover 51 is provided with a mounting hole 510 corresponding to the connection post 53, the mounting hole 510 is a through hole, and the other end of the connection post 53 is assembled into the mounting hole 510 and fixed in the mounting hole 510, preferably by a hot melt method, but not limited to this fixing method.
One end of the connecting column 53 fixed on the lower cover 58 is fixed with a plurality of reinforcing ribs 54, and the bottom ends of the reinforcing ribs 54 are fixedly connected with the lower cover 58.
The wind direction changing device 5 and the window 7 are arranged on the same side of the hood body 1 and below the window 7, and part of air flowing out of the wind direction changing device 5 is blown to the window 7, so that mist generated by the window 7 is avoided, and the exhaust filtering device 6 is arranged at the rear part of the hood body 1. The lower cover 51 is vertically fixed to the hood body 1.
The side of lower cover 58 facing away from upper cover 51 is equipped with protruding post 56, is equipped with the second through-hole in protruding post 56, and protruding post 56 can dismantle fixed connection with breathing tube 2, and the preferential common connected mode such as lock connection, threaded connection that adopts can adopt protruding post 56 external screw thread when adopting threaded connection, and the one end that is close to protruding post 56 of breathing tube 2 is equipped with the internal screw thread, breathing tube 2 and protruding post 56 threaded connection, convenient connection.
The breathing tube 2 preferably has a threaded tube structure, and the inner wall is smooth, and the outer wall has a threaded structure, so that wind resistance is reduced when the air in the breathing tube flows.
The lower cover 58 is provided with a stepped groove on a side thereof adjacent to the upper cover 51, the stepped groove communicating with the second through hole.
A check valve 57 is installed in the second through hole, and the check valve 57 can make the air in the wind direction changing device 5 flow unidirectionally.
The check valve 57 includes a valve seat and a valve core, the valve core is mounted on the valve seat, and the valve seat is mounted in the second through hole; the valve seat comprises an outer ring structure 574, an inner ring structure 578 is arranged in the outer ring structure 574, the length of the outer ring structure 574 is longer than that of the inner ring structure 578, and a plurality of connecting ribs 575 which are arranged at intervals are fixedly connected between the outer ring structure 574 and the inner ring structure 578; the valve core comprises a valve core column, one end of the valve core column is provided with an elastic baffle 571, the valve core column is arranged in the inner ring structure 578 and matched with the inner ring structure 578, the inner side surface of the baffle 571 is attached to the end surface of the outer ring structure 574, and the outer diameter of the baffle 571 is larger than the inner diameter of the outer ring structure 574 and smaller than the outer diameter of the outer ring structure 574.
The baffle 571 is vertically arranged, and the baffle 571 may be circular in shape or other shapes.
The valve core column comprises a first valve core part 576, a second valve core part 572 and a third valve core part 570 which are sequentially arranged, the outer diameter of the second valve core part 572 is larger than that of the first valve core part 576 and the third valve core part 570, the assembly is convenient, the second valve core part 572 is in interference fit with the inner ring structure 578, the firmness of the valve core column and the valve seat are improved, the second valve core part 572 is longer than the inner ring structure 578, the length difference between the second valve core part 572 and the inner ring structure is recorded as L, the range of L is 0.3 mm-0.5 mm, and the observation is convenient, and the valve core column is ensured to be installed in place; one end of the outer ring structure 574 is aligned with one end of the inner ring structure 578, and the inner side surface of the baffle 571 is in contact with the end surface of the inner ring structure 578, so that the baffle plate is convenient to mount in place; a conical limiting block 577 is arranged between the first valve core part 576 and the second valve core part 572, the limiting block 577 plays a limiting role, the valve core column is prevented from being leaved out, one end, close to the retaining sheet 571, of the limiting block 577 is larger than one end, away from the retaining sheet 571, of the limiting block, and the installation is convenient; the periphery of the valve seat is provided with a plurality of protruding rings 573 which are arranged at intervals, the number of the protruding rings 573 is preferably two, the protruding rings 573 are in interference fit with the second through holes, the check valve 57 is firmly fixed in the second through holes, the limiting rings 560 are arranged in the second through holes, and the limiting rings 560 are in contact with the protruding rings 573 which are close to the retaining sheets 571, so that the limiting effect is achieved.
The first valve core 576, the stopper 577, the second valve core 572, the third valve core 570 and the retaining sheet 571 are integrally formed, and are made of silica gel, so that the valve core column can be conveniently assembled in the valve seat, and other rubber materials can be adopted.
The length of the first valve core 576 is greater than the length of the inner ring structure 578, facilitating insertion of the first valve core 576 into the inner ring structure and then pulling outward to achieve an interference fit of the second valve core 572 with the inner ring structure 578.
When the blower 3 is operated, the primarily filtered air enters the second through hole through the breathing tube 2, then enters the space between the outer ring structure 574 and the inner ring structure 578, pushes the baffle 571, and the baffle 571 deforms outwards, thereby opening the check valve 57, as shown in fig. 10, and the arrows in fig. 10 point to the air flow direction.
The exhaust filtering device 6 comprises an exhaust hole arranged on the head cover body 1, and a filtering membrane is arranged at the exhaust hole and adopts a composite filtering membrane structure; the tightening and fixing device 4 is an elastic band, so that the lower part of the head cover body 1 can be conveniently tightened.
The composite filter membrane has various structural forms, and can adopt a first nonwoven fabric layer, a first melt-blown fabric layer, a second melt-blown fabric layer, an electrostatic cotton layer and a second nonwoven fabric layer which are laminated in sequence from outside to inside; the composite filter membrane can also adopt a first non-woven fabric layer, a first static cotton layer, a melt-blown fabric layer, a second static cotton layer and a second non-woven fabric layer which are laminated in sequence from outside to inside.
The invention can carry out omnibearing protection on the head of medical staff without wearing a mask or goggles, thereby avoiding pressure sores and indentations on the face of the medical staff and increasing the comfort of the medical staff. When the helmet is worn, the helmet body 1 is covered on the head of a medical staff, then the belt is tightened, and the air supply device is generally provided with a fixing belt to fix the air supply device on the body of the medical staff. When the air supply device 3 is started in use, the air supply device 3 carries out primary filtration on external air firstly, then enters the wind direction changing device 5 from the breathing tube 2, the one-way valve 57 is opened due to the air pressure effect, the filtered air enters the wind direction changing device 5 to be redirected, an air flow space is formed between the upper cover 51 and the lower cover 58, an air outflow opening is formed at the interval between the adjacent flow dividing plates 55, the filtered air is dispersed into the air flow space through the arc-shaped structure 52 and then flows out from the air outflow opening, the air is prevented from directly entering the protective hood, the position of a medical staff opposite to the air inlet of the protective hood is always in a blown state, and the comfort level of the protective hood is improved. When the human body exhausts outwards, the gas enters the external environment through the exhaust filtering device 6 of the cover body, so that the cross infection phenomenon is avoided.
Claims (4)
1. The utility model provides a can change micro-positive pressure protection hood of wind direction, includes the hood body, and the front portion of hood body is equipped with the window, and the lower part of hood body is equipped with tightens up fixing device, and the hood body is equipped with air supply arrangement, its characterized in that outward: the hood body is internally provided with a wind direction changing device, a breathing tube is arranged between the wind direction changing device and the air supply device, and the wind direction changing device is communicated with the air supply device through the breathing tube; the hood body is also provided with an exhaust filtering device, the exhaust filtering device comprises an exhaust hole arranged on the hood body, and a filtering membrane is arranged at the exhaust hole; the tightening and fixing device is an elastic belt; the wind direction changing device comprises an upper cover and a lower cover, a connecting column is fixedly connected between the upper cover and the lower cover, a plurality of flow dividing plates are arranged between the upper cover and the lower cover at intervals, an inward-protruding arc-shaped structure is arranged in the middle of the upper cover, and the lower cover is communicated with the breathing tube; a convex column is arranged on one side of the lower cover, which is away from the upper cover, a second through hole is arranged in the convex column, and the convex column is detachably and fixedly connected with the breathing tube; a one-way valve is arranged in the second through hole; the one-way valve comprises a valve seat and a valve core, the valve core is arranged on the valve seat, and the valve seat is arranged in the second through hole; the valve seat comprises an outer ring structure, an inner ring structure is arranged in the outer ring structure, and a plurality of connecting ribs which are arranged at intervals are fixedly connected between the outer ring structure and the inner ring structure; the valve core comprises a valve core column, one end of the valve core column is provided with an elastic baffle plate, the valve core column is arranged in the inner ring structure and matched with the inner ring structure, and the inner side surface of the baffle plate is attached to the end surface of the outer ring structure; the valve core column comprises a first valve core part, a second valve core part and a third valve core part which are sequentially arranged, the outer diameter of the second valve core part is larger than that of the first valve core part and that of the third valve core part, the second valve core part is in interference fit with the inner ring structure, the second valve core part is longer than the inner ring structure, the difference between the length of the second valve core part and the length of the inner ring structure is recorded as L, and the range of L is 0.3 mm-0.5 mm; the inner side surface of the baffle plate is contacted with the end surface of the inner ring structure; a conical limiting block is arranged between the first valve core part and the second valve core part, and one end, close to the baffle, of the limiting block is larger than one end, deviating from the baffle, of the limiting block; the periphery of the valve seat is provided with a plurality of protruding rings which are arranged at intervals, the protruding rings are in interference fit with the second through holes, limiting rings are arranged in the second through holes, and the limiting rings are in contact with the protruding rings close to the baffle plates.
2. The wind-direction changeable micro-positive pressure protective headgear of claim 1, wherein: the splitter plate is arranged along the circumferential direction of the edge of the end face of the lower cover; one end of the flow dividing plate is fixed on the lower cover, and the other end of the flow dividing plate is contacted with the upper cover.
3. The wind-direction changeable micro-positive pressure protective headgear of claim 2, wherein: one end of the connecting column is fixed on the lower cover, the upper cover is provided with a mounting hole corresponding to the connecting column, and the other end of the connecting column is assembled into the mounting hole and fixed in the mounting hole.
4. The wind-direction changeable micro-positive pressure protective headgear of claim 3, wherein: the wind direction changing device is arranged on the same side as the window and below the window; the lower cover is vertically fixed on the head cover body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010091479.XA CN111084940B (en) | 2020-02-13 | 2020-02-13 | Micro-positive pressure protective hood capable of changing wind direction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010091479.XA CN111084940B (en) | 2020-02-13 | 2020-02-13 | Micro-positive pressure protective hood capable of changing wind direction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111084940A CN111084940A (en) | 2020-05-01 |
| CN111084940B true CN111084940B (en) | 2024-03-22 |
Family
ID=70400063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010091479.XA Active CN111084940B (en) | 2020-02-13 | 2020-02-13 | Micro-positive pressure protective hood capable of changing wind direction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111084940B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112717294B (en) * | 2021-01-08 | 2021-07-23 | 常州迅安科技股份有限公司 | Upper air duct air supply mechanism, head protector and electric protection equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101290072A (en) * | 2008-04-10 | 2008-10-22 | 浙江沃尔达铜业有限公司 | Unidirectional stop valve |
| JP2010042087A (en) * | 2008-08-11 | 2010-02-25 | Normeca Asia:Kk | Protective mask |
| CN102671321A (en) * | 2012-04-19 | 2012-09-19 | 高全军 | Nostril respiration tube respirator |
| CN104548404A (en) * | 2015-01-16 | 2015-04-29 | 天瑞联创（北京）科技发展有限公司 | Built-in breather valve and air filtering mask of fan |
| KR101729639B1 (en) * | 2017-01-26 | 2017-04-24 | 조기형 | mask |
| CN208865001U (en) * | 2018-02-02 | 2019-05-17 | 赵淑芬 | A kind of indwelling tube anti-drop device of pernicious chest and abdomen hydrops tapping |
| CN213159045U (en) * | 2020-02-13 | 2021-05-11 | 河南驼人医疗器械集团有限公司 | Pressure-fired protective hood capable of changing wind direction |
-
2020
- 2020-02-13 CN CN202010091479.XA patent/CN111084940B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101290072A (en) * | 2008-04-10 | 2008-10-22 | 浙江沃尔达铜业有限公司 | Unidirectional stop valve |
| JP2010042087A (en) * | 2008-08-11 | 2010-02-25 | Normeca Asia:Kk | Protective mask |
| CN102671321A (en) * | 2012-04-19 | 2012-09-19 | 高全军 | Nostril respiration tube respirator |
| CN104548404A (en) * | 2015-01-16 | 2015-04-29 | 天瑞联创（北京）科技发展有限公司 | Built-in breather valve and air filtering mask of fan |
| KR101729639B1 (en) * | 2017-01-26 | 2017-04-24 | 조기형 | mask |
| CN208865001U (en) * | 2018-02-02 | 2019-05-17 | 赵淑芬 | A kind of indwelling tube anti-drop device of pernicious chest and abdomen hydrops tapping |
| CN213159045U (en) * | 2020-02-13 | 2021-05-11 | 河南驼人医疗器械集团有限公司 | Pressure-fired protective hood capable of changing wind direction |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111084940A (en) | 2020-05-01 |
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