CN211798355U - Pressure-fired protection hood with secondary filtering and air suction functions - Google Patents
Pressure-fired protection hood with secondary filtering and air suction functions Download PDFInfo
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- CN211798355U CN211798355U CN202020167603.1U CN202020167603U CN211798355U CN 211798355 U CN211798355 U CN 211798355U CN 202020167603 U CN202020167603 U CN 202020167603U CN 211798355 U CN211798355 U CN 211798355U
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Abstract
A micro-positive pressure protective hood with a secondary filtering and air suction function 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 primary filtering device is arranged in the air supply device, a secondary filtering device is arranged in the hood body, a breathing tube is arranged between the secondary filtering device and the air supply device, and the secondary filtering device is communicated with the air supply device through the breathing tube; the hood body is also provided with an exhaust filtering device. The utility model discloses can carry out the omnidirectional protection to medical personnel's head, need not wear gauze mask and goggles, avoid pressing sore, indentation appearing in medical personnel's face, increase medical personnel's comfort, primary filter equipment among the air supply arrangement carries out primary filter to the air, and this internal second grade filter equipment that is equipped with of hood carries out secondary filter to the air to impurity, bacterium, virus etc. in the air carry out abundant filtration, and the security is high.
Description
Technical Field
The utility model relates to the technical field of medical equipment, concretely relates to pressure-fired protection hood with secondary filter function of breathing in.
Background
At present, medical workers mostly wear masks for protecting themselves or wear goggles for protection, and the mode of protection is relatively limited, such as the head, ears and other parts cannot be protected, and the problems of pressure sores, indentations and the like easily occur on the faces of the medical workers due to the fact that the medical workers are cumbersome to wear; the traditional protective clothes are complicated to put on and take off, the time consumption is long, and the whole body is positioned in the protective clothes, so that the protective clothes are hot and stuffy.
Therefore, the protective hood has come to work, the air supply device is arranged outside the protective hood and generally comprises a motor, a fan, a primary filtering device, a lithium battery, a circuit board and the like, the air supply device sends air into the protective hood, but the filtering form is poor in safety, and when the motor is damaged or the motor is out of power, if the motor fails once or the battery is out of power, viruses or polluted air still possibly enters a human body through a pipeline connected with the motor.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: the micro-positive pressure protective hood with the secondary filtering and air suction functions is used for filtering air for the second time, and is high in safety.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a micro-positive pressure protective hood with a secondary filtering and air suction function 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 primary filtering device is arranged in the air supply device, a secondary filtering device is arranged in the hood body, a breathing tube is arranged between the secondary filtering device and the air supply device, and the secondary filtering device is communicated with the air supply device through the breathing tube; the hood body is also provided with an exhaust filtering device.
The secondary filtering device comprises an upper cover and a lower cover, the upper cover is fixedly connected with the lower cover, and a secondary filtering element is arranged between the upper cover and the lower cover; the upper cover is provided with a first through hole for the filtered air to pass through, and the lower cover is communicated with the breathing tube.
One side that deviates from the secondary filter core of lower cover is equipped with protruding post, is equipped with the second through-hole in the protruding post, and fixed connection can be dismantled with protruding post to the respiratory tube.
One side of the lower cover close to the secondary filtering filter element is provided with a stepped groove, and the secondary filtering filter element is arranged on the step of the stepped groove.
The bottom surface of the lower cover, which is close to one side of the secondary filter element, is provided with lower support ribs, the number of the lower support ribs is a plurality of and is arranged along the circumferential uniform interval of the lower cover, and the lower support ribs are in contact with the secondary filter element.
A check valve is arranged in the second through hole.
The check 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 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 separation blade, 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 separation blade 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 marked as L, and the range of the 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 of the limiting block close to the blocking piece is larger than one end of the limiting block far away from the blocking piece; the periphery of the valve seat is provided with a plurality of raised rings which are arranged at intervals, the raised rings are in interference fit with the second through hole, a limiting ring is arranged in the second through hole, and the limiting ring is in contact with the raised rings close to the separation blade.
The upper cover comprises an outer ring structure, a middle ring structure and an inner core structure which are sequentially arranged from outside to inside, and a plurality of connecting rods are fixedly connected between the outer ring structure and the middle ring structure and between the middle ring structure and the inner core structure; the outer ring structure is fixedly connected with the lower cover; one side of the middle ring structure close to the secondary filtering element is provided with a plurality of spacing bulges arranged at intervals; one side of the inner core structure close to the secondary filtering filter element is also provided with a limiting bulge.
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 band.
The utility model discloses can carry out the omnidirectional protection to medical personnel's head, need not wear gauze mask and goggles, avoid pressing sore, indentation in medical personnel's facial appearance, increase medical personnel's comfort, among the air supply arrangement justThe primary filtering device is used for primary filtering of air, and the secondary filtering device is arranged in the hood body and used for secondary filtering of air, so that impurities, bacteria, viruses and the like in the air are fully filtered, and the safety is high; the one-way valve can enable air in the secondary filtering device to flow in a one-way mode, when the air supply device works, the air after primary filtering enters the second through hole through the breathing pipe and then enters a gap between the outer ring structure and the inner ring structure to push the blocking piece, the blocking piece deforms outwards, the one-way valve is opened, the air is subjected to secondary filtering through the secondary filtering filter element and then flows into the hood from the first through hole of the upper cover; when the air supply device is damaged or is not powered on, the one-way valve is closed, so that air mixed with impurities, bacteria, viruses and the like is prevented from entering the head cover。
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a partial cross-sectional view of the present invention;
FIG. 3 is a schematic structural diagram (one) of a two-stage filtration device;
FIG. 4 is a schematic structural diagram of a two-stage filtration device (II);
FIG. 5 is an enlarged schematic view at B in FIG. 4;
FIG. 6 is a schematic structural view of the check valve in an open state;
FIG. 7 is a schematic structural view of a valve stem;
FIG. 8 is a schematic view of a valve seat;
FIG. 9 is a schematic structural view of the lower cover;
fig. 10 is a schematic structural view of the upper cover.
Detailed Description
As shown in figures 1 to 10, a micro-positive pressure protective hood with secondary filtering and air suction functions comprises a hood body 1, a window 7 is arranged at the front part of the hood body 1, the window 7 is made of transparent pe sheet material, the window 7 is fixedly connected with the hood body 1, preferably, a large window is adopted, and can display the whole face of a medical worker, so that the medical worker can observe the window, a tightening and fixing device 4 is arranged at the lower part of the hood body 1, an air supply device 3 is arranged outside the hood body 1, a primary filtering device is arranged in the air supply device 3, the air supply device 3 further comprises a motor, a fan, a lithium battery and a circuit board, the lithium battery supplies power to the circuit board, the circuit board controls the motor to work, the motor drives the fan to work, the fan sucks air and filters the air through the primary filtering device, the description is omitted for the prior art, in addition, the air supply device 3, as shown in fig. 2, a secondary filtering device 5 is arranged in the hood body 1, wherein a in fig. 2 is a splitting track, i.e. a splitting line, the secondary filtering device 5 is preferably fixedly connected in the hood body 1 to avoid shaking in the using process, a breathing tube 2 is arranged between the secondary filtering device 5 and the air supply device 3, and the secondary filtering device 5 is communicated with the air supply device 3 through the breathing tube 2; the hood body 1 is also provided with an exhaust filtering device 6.
The secondary filtering device 5 comprises an upper cover 51 and a lower cover 58, the upper cover 51 is fixedly connected with the lower cover 58, common connection modes such as ultrasonic welding, buckling connection and the like are preferably selected, and a secondary filtering filter element 54 is arranged between the upper cover 51 and the lower cover 58; the upper cover 51 is provided with a first through hole 514 for filtered air to pass through, the lower cover 58 is communicated with the breathing tube 2, and the lower cover 58 is fixedly connected with the head cover body 1.
The secondary filtering element 54 adopts a composite filtering membrane, the structural form of the composite filtering membrane is diversified, and the composite filtering membrane can adopt a first non-woven fabric layer, a first melt-blown fabric layer, a second melt-blown fabric layer, an electrostatic cotton layer and a second non-woven fabric layer which are laminated in sequence from outside to inside; the composite filtering membrane may also adopt a first non-woven fabric layer, a first electrostatic cotton layer, a melt-blown fabric layer, a second electrostatic cotton layer and a second non-woven fabric layer which are laminated in sequence from outside to inside, where outside refers to the side of the secondary filtering element 54 close to the breathing tube 2.
One side that deviates from second grade filter core 54 of lower cover 58 is equipped with protruding post 56, is equipped with the second through-hole in protruding post 56, and fixed connection can be dismantled with respiratory tube 2 to protruding post 56, and common connection forms such as lock connection, threaded connection are preferentially selected for use, can be equipped with the external screw thread outside protruding post 56, and respiratory tube 2's the one end that is close to protruding post 56 is equipped with the internal thread, respiratory tube 2 and protruding post 56 threaded connection, and convenient for connection.
One side of lower cover 58 that is close to second grade filtration filter core 54 is equipped with the ladder groove, and second grade filtration filter core 54 sets up on the step 59 of ladder groove, the placing of second grade filtration filter core 54 of being convenient for, and the ladder groove includes upper groove and lower groove, and the lower groove sets up the bottom at the upper groove, and the shape of second grade filtration filter core 54 suits with the shape of upper groove, covers the top of lower groove is whole, and the second through-hole of protruding post 56 communicates with lower groove, upper groove in proper order.
The bottom surface of the side, close to the secondary filter element 54, of the lower cover 58 is provided with lower support ribs 55, the number of the lower support ribs 55 is a plurality, the lower support ribs 55 are uniformly arranged at intervals along the circumferential direction of the lower cover 58, the lower support ribs 55 are in contact with the secondary filter element 54, and the lower support ribs 55 play a supporting role.
A check valve 57 is installed in the second through hole, and the check valve 57 enables one-way flow of air in the secondary filter device 5.
The check valve 57 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 574, an inner ring structure 578 is arranged in the outer ring structure 574, the length of the outer ring structure 574 is larger 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 blocking sheet 571 is vertically arranged, and the shape of the blocking sheet 571 is circular, but may be 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 that of the third valve core part 570, so that assembly is facilitated, the second valve core part 572 is in interference fit with an inner ring structure 578, the firmness of the valve core column in fit with a valve seat is improved, the second valve core part 572 is longer than the inner ring structure 578, the difference between the length of the second valve core part 572 and the length of the inner ring structure is marked as L, the range of L is 0.3 mm-0.5 mm, and observation is facilitated and the valve core column is ensured; 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 installation is convenient; 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 jumping out, and one end, close to the separation blade 571, of the limiting block 577 is larger than one end, away from the separation blade 571, of the limiting block 577, so that the installation is convenient; the periphery of the valve seat is provided with a plurality of protruding rings 573 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, so that 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 close to the blocking pieces 571, so that the limiting effect is achieved.
The first valve core part 576, the stopper 577, the second valve core part 572, the third valve core part 570 and the stopper 571 are integrally formed, and are made of silica gel, so that the valve core column can be assembled in the valve seat conveniently, and other rubber materials can be adopted.
The length of the first valve core portion 576 is greater than the length of the inner ring structure 578, so that the first valve core portion 576 can be inserted into the inner ring structure first and then pulled outward, thereby achieving the interference fit between the second valve core portion 572 and the inner ring structure 578.
When the air supply device 3 works, primarily filtered air enters the second through hole through the breathing tube 2 and then enters a gap between the outer ring structure 574 and the inner ring structure 578, the blocking piece 571 is pushed, the blocking piece 571 deforms outwards, so that the one-way valve 57 is opened, as shown in fig. 6, an arrow in fig. 6 indicates the air flow direction, the air passes through the secondary filtering filter element 54 for secondary filtering, and then flows into the hood from the first through hole 514 of the upper cover 51; when the air supply means 3 is damaged or is not powered, the check valve 57 is closed to prevent air mixed with impurities, bacteria, viruses, etc. from entering the head housing.
The upper cover 51 comprises an outer ring structure 510, a middle ring structure 511 and an inner core structure 512 which are sequentially arranged from outside to inside, the outer ring structure 510 and the middle ring structure 511 are both annular, the inner core structure 512 is plate-shaped, preferably a circular plate, and a plurality of connecting rods 513 are fixedly connected between the outer ring structure 510 and the middle ring structure 511 and between the middle ring structure 511 and the inner core structure 512; the outer ring structure 510 is fixedly connected with the lower cover 58, when the outer ring structure 510 and the lower cover 58 are fastened, an annular convex part 52 is arranged on one side of the outer ring structure 510 close to the lower cover 58, the annular convex part 52 is arranged in the stepped groove of the lower cover 58 and is in abutting contact with the inner wall of the stepped groove, and the fastening of the outer ring structure 510 and the lower cover 58 is realized; a plurality of spacing bulges 53 arranged at intervals are arranged on one side of the middle ring structure 511 close to the secondary filtering element 54; the side of the inner core structure 512 close to the secondary filter element 54 is also provided with a limiting protrusion 53, and the limiting protrusion 53 plays a limiting role, so that the secondary filter element 54 is prevented from moving greatly.
The exhaust filtering device 6 comprises an exhaust hole arranged on the head cover body 1, a filtering membrane is arranged at the exhaust hole, and the filtering membrane also adopts the composite filtering membrane structure; the tightening and fixing device 4 is an elastic band, which is convenient for tightening the lower part of the head cover body 1.
The utility model discloses can carry out the omnidirectional protection to medical personnel's head, need not wear gauze mask and goggles, avoid pressing sore, indentation in medical personnel's facial appearance, increase medical personnel's comfort. When the head cover is worn, the head cover body 1 covers the head of a medical worker, then the belt is tightened, and the air supply device is generally provided with a fixing belt and fixed on the body of the medical worker. When the respirator is used, the air supply device 3 is started, the air supply device 3 firstly carries out primary filtration on outside air, then the outside air enters the secondary filtering device 5 from the breathing pipe 2, the one-way valve 57 is opened due to the air pressure, the air carries out secondary filtration through the secondary filtering element 54, and then the air flows into the hood from the first through hole 514 of the upper cover 51. When the human body exhausts, the gas enters the external environment through the exhaust filter device 6 of the cover body, so that the cross infection phenomenon is avoided.
Claims (10)
1. The utility model provides a pressure-fired protection hood with secondary filter function of inhaling, 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 outward, is equipped with elementary filter equipment in the air supply arrangement, its characterized in that: a secondary filtering device is arranged in the hood body, a breathing tube is arranged between the secondary filtering device and the air supply device, and the secondary filtering device is communicated with the air supply device through the breathing tube; the hood body is also provided with an exhaust filtering device.
2. The micro-positive pressure protective hood with secondary filtering and air suction functions of claim 1, wherein: the secondary filtering device comprises an upper cover and a lower cover, the upper cover is fixedly connected with the lower cover, and a secondary filtering element is arranged between the upper cover and the lower cover; the upper cover is provided with a first through hole for the filtered air to pass through, and the lower cover is communicated with the breathing tube.
3. The micro-positive pressure protective hood with secondary filtering and air suction functions as claimed in claim 2, wherein: one side that deviates from the secondary filter core of lower cover is equipped with protruding post, is equipped with the second through-hole in the protruding post, and fixed connection can be dismantled with protruding post to the respiratory tube.
4. A micro-positive pressure protective hood with secondary filtering and air suction functions as claimed in claim 2 or 3, wherein: one side of the lower cover close to the secondary filtering filter element is provided with a stepped groove, and the secondary filtering filter element is arranged on the step of the stepped groove.
5. The micro-positive pressure protective hood with secondary filtering and air suction functions of claim 4, wherein: the bottom surface of the lower cover, which is close to one side of the secondary filter element, is provided with lower support ribs, the number of the lower support ribs is a plurality of and is arranged along the circumferential uniform interval of the lower cover, and the lower support ribs are in contact with the secondary filter element.
6. A micro-positive pressure protective hood with secondary filtering and air-breathing function as claimed in claim 3, characterized in that: a check valve is arranged in the second through hole.
7. The micro-positive pressure protective hood with secondary filtering and air suction functions of claim 6, wherein: the check 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 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 separation blade, 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 separation blade is attached to the end surface of the outer ring structure.
8. The micro-positive pressure protective hood with secondary filtering and air suction functions of claim 7, wherein: 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 marked as L, and the range of the 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 of the limiting block close to the blocking piece is larger than one end of the limiting block far away from the blocking piece; the periphery of the valve seat is provided with a plurality of raised rings which are arranged at intervals, the raised rings are in interference fit with the second through hole, a limiting ring is arranged in the second through hole, and the limiting ring is in contact with the raised rings close to the separation blade.
9. The micro-positive pressure protective hood with secondary filtering and air suction functions as claimed in claim 2, wherein: the upper cover comprises an outer ring structure, a middle ring structure and an inner core structure which are sequentially arranged from outside to inside, and a plurality of connecting rods are fixedly connected between the outer ring structure and the middle ring structure and between the middle ring structure and the inner core structure; the outer ring structure is fixedly connected with the lower cover; one side of the middle ring structure close to the secondary filtering element is provided with a plurality of spacing bulges arranged at intervals; one side of the inner core structure close to the secondary filtering filter element is also provided with a limiting bulge.
10. The micro-positive pressure protective hood with secondary filtering and air suction functions of claim 1, wherein: 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 band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020167603.1U CN211798355U (en) | 2020-02-13 | 2020-02-13 | Pressure-fired protection hood with secondary filtering and air suction functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020167603.1U CN211798355U (en) | 2020-02-13 | 2020-02-13 | Pressure-fired protection hood with secondary filtering and air suction functions |
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| Publication Number | Publication Date |
|---|---|
| CN211798355U true CN211798355U (en) | 2020-10-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020167603.1U Active CN211798355U (en) | 2020-02-13 | 2020-02-13 | Pressure-fired protection hood with secondary filtering and air suction functions |
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| Country | Link |
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| CN (1) | CN211798355U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110960813A (en) * | 2020-02-13 | 2020-04-07 | 河南驼人医疗器械集团有限公司 | Pressure-fired protection hood with secondary filtering and air suction functions |
-
2020
- 2020-02-13 CN CN202020167603.1U patent/CN211798355U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110960813A (en) * | 2020-02-13 | 2020-04-07 | 河南驼人医疗器械集团有限公司 | Pressure-fired protection hood with secondary filtering and air suction functions |
| CN110960813B (en) * | 2020-02-13 | 2024-05-14 | 河南驼人医疗器械集团有限公司 | Micro-positive pressure protective hood with secondary filtering and air suction functions |
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