CN215275483U - Electric air supply respiratory protection system and flow distribution mechanism thereof - Google Patents

Abstract

The application belongs to the technical field of medical health protection, and provides a shunt mechanism which is arranged in a hood of an electric air supply respiratory protection system and comprises an electric air supply machine and a shunt piece, wherein the electric air supply machine is fixed on the neck of a human body, the electric air supply machine is connected with a conveying pipe for conveying output gas, and the shunt piece is supported at the top of the hood through the conveying pipe; be equipped with the diffluence pass that encircles the diffluence piece periphery and set up on the diffluence piece, electric blower down last the continuous transport of diffluence piece can let the inside air flow that is higher than outside atmospheric pressure that forms of hood. The application still provides an electronic air supply respiratory protection system who uses above-mentioned reposition of redundant personnel mechanism. The utility model provides a reposition of redundant personnel mechanism that electronic air supply respiratory protection system adopted can solve the reposition of redundant personnel mechanism that electronic air supply respiratory protection system adopted of prior art and lead to increasing systematic counter weight, lets the person of wearing be difficult to wear the technical problem who influences normal operation for a long time.

Description

Electric air supply respiratory protection system and flow distribution mechanism thereof

Technical Field

The application belongs to the technical field of medical and health protection, and particularly relates to a flow distribution mechanism on an electric air supply respiratory protection device in a high-risk environment with biohazard factors and an electric air supply respiratory protection system thereof.

Background

The prior art pertains to positive pressure respiratory protection systems that use an electrically driven and continuous supply of clean air. The positive pressure means that the input air flow is higher than the outflow, so that the internal pressure higher than the external atmospheric pressure can be formed in the hood, and further, external pollutants can not permeate into the protection area against the air pressure, so as to achieve the purpose of respiratory protection of a wearer. As shown in figure 1, the multifunctional head cover comprises a head cover 1, a filter box 2, an electric blower 3 and a conveying pipe 4 for conveying airflow, wherein the electric blower 3 and the filter box 2 are arranged at the waist, the air inlet end of the conveying pipe 4 is communicated with the electric blower 3 at the waist, and the joint of the air outlet end of the conveying pipe 4 and the head cover 1 is arranged at a higher position behind the head of a wearer. The structure of the delivery pipe 4 connected to the inside of the hood 1 is mainly divided into the following two types.

The first one is that the inside of hood 1 does not have reposition of redundant personnel mechanism, and the end of giving vent to anger of conveyer pipe 4 passes through the support isotructure to be fixed inside hood 1, and clean air current blows into hood 1 through conveyer pipe 4 to directly impact the person's of wearing top of the head rear portion region, along the person's of wearing head type, flow direction hood 1 inside other positions, formed foretell malleation environment in hood 1, the air current outwards flows out through the neck gap. This structure, which is fixed in a position and continuously blows the air flow against the wearer's head, causes great discomfort to the wearer.

The second is that the interior of the head cover 1 is provided with a flow dividing mechanism, as shown in fig. 2, a wearer wears a ring-shaped head frame a which expands the interior of the head cover 1, two air injection pipes B are respectively arranged at two sides of the head frame a, and the two air injection pipes B are connected with the head frame a into a whole and carry out semi-surrounding protection on the head of the human body. Because the head frame A on the electric air supply respiratory protection system needs to have an anti-collision function, the head frame A has certain structural strength, the weight of the head frame A reaches about 500g, and wearing fatigue is easily caused.

The two internal structures of the hood have the function of drawing the air delivery pipe 4 outside the hood 1 at the same time. The delivery tube is suspended above and behind the hood, and the weight of the delivery tube is transferred to the head of a wearer to bear by the internal structure of the hood. The weight of the delivery pipe 4 is typically about 200 and 400 g, which varies with the material. For the wearer who works for a long time, the weight of the shunting mechanism and the weight of the conveying pipe 4 seriously reduce the wearing comfort, increase the fatigue feeling and reduce the working efficiency.

In addition, with the second type of flow diversion mechanism, the flow of air is directed from the back top of the person's brain to the temple position and the forehead upper position of the person, so that the flow of air preferentially flows down the face area of the hood 1, and the back of the wearer's neck is not ultimately distributed to the flow of air. According to Bernoulli's theorem, in the hood 1, the air flow at the face position of the wearer is fast, and the pressure is small; the air flow is slow and the pressure is strong behind the neck. The same atmospheric pressure outside the hood 1 makes it difficult to keep the hood 1 upright and always against the face of the wearer in facial position. In order to solve this problem, the prior art uses a face screen made of a hard material, which is fixed to a head frame a to maintain the shape of the hood 1, and prevents the face area of the hood 1 from collapsing against the wearer's face by being supported by the head frame a. The surface screen has the curvature and certain hardness, so that the manufacturing cost is relatively high, and the surface screen is easy to break, so that the surface screen needs to be packaged in a box, and the transportation cost is increased.

Disclosure of Invention

An object of this application is to provide an electronic air supply respiratory protection system and reposition of redundant personnel mechanism thereof to the reposition of redundant personnel mechanism that solves the electronic air supply respiratory protection system of prior art and adopt leads to increasing the counter weight of system, lets the person of wearing be difficult to wear the technical problem who influences normal operation for a long time.

In order to achieve the purpose, the technical scheme adopted by the application is as follows: the flow dividing mechanism is arranged in a hood of the electric air supply respiratory protection system and comprises an electric air supply blower and a flow dividing piece, wherein the electric air supply blower is fixed on the neck of a human body, a conveying pipe for conveying output gas is connected to the electric air supply blower, and the flow dividing piece is supported at the top of the hood through the conveying pipe; be equipped with the diffluence pass that encircles the diffluence piece periphery and set up on the diffluence piece, electric blower down last the continuous transport of diffluence piece can let the inside air flow that is higher than outside atmospheric pressure that forms of hood. On the one hand, the electric blower is used as a device worn on the neck of a human body in the hood, the electric blower is connected with a conveying pipe, the conveying pipe is located in the hood and supports the shunt part on the top of the head of the human body, the traditional structure of adopting a head frame is replaced, a longer conveying pipe is not connected to the head cover from the outside, the load bearing and the external tension on the head of a wearer are effectively relieved, the wearing comfort is improved, and the fatigue of the wearer is reduced. On the other hand, encircle the diffluence pass that sets up on the diffluence piece to combine electric forced draught blower to keep the clean air current of output toward the diffluence piece, let the inside positive pressure environment that forms of hood. With this, the hood is inside need not to set up headstock and stereoplasm face screen, also can let the hood keep upright state to can make the cover wall of hood and human head keep the separation, and then solve the hood cover wall that is located human facial region and collapse easily to the problem of people's face, simplify whole protection system's structure effectively, reduce whole weight, let the person of wearing for a long time.

It is right the structure of reposition of redundant personnel improves, the reposition of redundant personnel is the circular body of platykurtic, the last diverging port of reposition of redundant personnel is by a plurality of even and set up the hole of airing exhaust on reposition of redundant personnel outer periphery circle with the interval and constitute. Therefore, the shunting port on the shunting piece is simple in structure, easy to machine and form and low in manufacturing cost, and the technical effect of uniform shunting can be achieved.

Another improvement is made on the structure of the flow dividing piece, the flow dividing piece is a flat star-shaped body, a plurality of convex parts extending outwards are arranged on the outer circumference of the flow dividing piece, concave parts are formed between the adjacent convex parts, and the flow dividing ports are respectively formed in the convex parts and the concave parts, so that the flow dividing effect is improved. The diversion port may preferably be a plurality of air exhaust holes arranged uniformly and at intervals, or may be a long hole formed on the convex portion or the concave portion.

The structure of the flow dividing port on the flow dividing piece is improved, and the flow dividing port on the flow dividing piece is an air exhaust gap surrounding the outer circumference ring of the flow dividing piece. Therefore, the output airflow is subjected to stepless distribution, and the flow dividing effect is further improved.

The structure of the shunt piece is improved again, the top of the shunt piece is arched upwards, and the top of the shunt piece is provided with an arc-shaped surface which is abutted against the inner top wall of the hood. The top of the head cover is opened by the flow dividing piece, and an arc cover wall extending downwards in an arc line is formed, so that the guiding of the airflow output from the flow dividing port of the flow dividing piece is facilitated. After the system is worn, the electric blower is started to enable the head cover to rapidly expand and form a positive pressure environment, and then the head cover can be rapidly in a working state.

The structure of the conveying pipe is improved, and the conveying pipe is a universal pipe formed by sequentially connecting a plurality of moving parts. The conveying pipe can preferably adopt a universal plastic cooling pipe, and the characteristics of the sealing performance and the structural shaping strength of the pipe body are utilized to play a certain shaping role. The delivery pipe can be bent into an arc shape matched with the curve of the hindbrain of the human body, and plays a role in supporting the head cover. The conveyer pipe can play the supporting role as the support to the reposition of redundant personnel piece, and then alleviates the pressure to the wearer's head, lets the wearer can wear this protection system for a long time.

Further, be equipped with two at least on the electric blower the conveyer pipe, two at least conveyer pipes up extend parallelly, just the conveyer pipe to the top of hood is extended highly to be higher than human top of the head. On one hand, the combination of at least two conveying pipes forms a double-pipe supporting structure, so that the supporting effect of the flow dividing piece can be improved, the flow dividing piece can be stably supported at the inner top of the hood, a gas flow passage transmitted to the flow dividing piece from the electric blower can be increased, and the power of output gas flow is improved; in addition, the expansion range of the head cover can be enlarged, and the stability of the expanded shape of the head cover can be maintained. In another aspect, the delivery tube extends to a height above the top of the hood so that the hood does not rest on the top of the wearer's head. The head of the wearer is not used as a bearing point of the shunt piece, so that the wearing comfort is improved, and the fatigue of the wearer caused by long-time wearing is reduced.

Still further, be equipped with on the reposition of redundant personnel piece with the same first connector of conveyer pipe quantity, be equipped with on the electric blower with the same and parallel arrangement's of conveyer pipe quantity second connector, the both ends of conveyer pipe respectively with first connector reaches the second connector is connected. Let electric blower, reposition of redundant personnel piece and conveyer pipe be dismantled and assembled subassembly, can disinfect cleanness electric blower, reposition of redundant personnel piece and conveyer pipe respectively, be favorable to used repeatedly, reduce used repeatedly's risk.

The application also provides an electric air supply respiratory protection system which comprises a head cover, a filter box and the flow dividing mechanism, wherein the head cover is provided with an air collecting hole, and the electric air supply blower is provided with a sleeve communicated with the outside of the head cover through the air collecting hole; the filter box is arranged in the electric blower or detachably connected to the electric blower. Therefore, the arrangement form of the filter box can be set according to the actual production and application requirements.

Further, the electric blower is a U-shaped body which can be worn on the neck of a human body, and comprises a bending part and arm parts connected to two ends of the bending part; the outside of hood is equipped with the straining ring that the cover wall of hood tightens up on the human body, the straining ring is located the below of electric blower, just have the regulation on the straining ring the regulating part of straining ring elasticity. On one hand, the electric blower is made to form a U-shaped structure similar to a neck hoop or a neck pillow, so that the electric blower is convenient for a wearer to wear or remove. On the other hand, the tightening ring that the hood outside set up lets the wearer can loosen the tightening ring from the outside operation regulating part of hood to desorption protection system fast reduces the pollution of wearer to the place environment in the desorption environment, thereby reduces the infection risk to other personnel that are in the desorption environment.

The application provides an electronic air supply respiratory protection system and reposition of redundant personnel mechanism's beneficial effect lies in: compared with the prior art, the electric blower sets to be located the inside device of just wearing on human neck of hood, is connected with the conveyer pipe on the electric blower, and this conveyer pipe is located the inside of hood and supports the reposition of redundant personnel piece on human overhead, can replace the structure that the tradition adopted the headstock effectively, does not have longer conveyer pipe from the outside access headgear yet to this bearing and the outside pulling force to the wearer's head of relieving, improves and wears the travelling comfort, reduces the tired sense of wearer, improves work efficiency.

The flow dividing piece is supported on the inner top of the hood through the conveying pipe so as to support and cooperate with the output airflow to open the hood. The flow dividing port on the periphery of the flow dividing piece uniformly blows the air flow conveyed by the electric blower to the periphery so that the output air flow uniformly flows downwards along the inner wall of the hood on the head of a wearer, and the pressure of the air flow between the head of the wearer and the inner wall of the hood is uniform; and the electric blower continuously outputs clean air flow to the flow dividing piece, so that a positive pressure environment is formed inside the head cover. Therefore, even if the head rest and the hard face screen are not supported in the head cover, the head cover can be kept in a standing state, so that the cover wall of the head cover is kept separated from the head of a human body, and the problem that the cover wall of the head cover positioned in the face area of the human body is easy to collapse to the face of a person can be solved. The problem that the face of the hood wall collapses is solved without adding structures such as a face screen in the hood, the structure of the whole protection system is effectively simplified, the whole weight is reduced, and a wearer can wear the hood for a long time.

In addition, this reposition of redundant personnel passes through the conveyer pipe and supports at the interior top of hood, is located the top of human head promptly, shunts the air current of electric blower output, and the end of giving vent to anger among the fungible prior art is located the structure at people's brain rear portion, and then avoids continuously blowing the afterbrain of the person of wearing, improves the comfort of wearing effectively.

In the electronic air supply respiratory protection system that this application had above-mentioned reposition of redundant personnel mechanism, electronic forced draught blower, conveyer pipe and reposition of redundant personnel piece all set up in the inside of hood, are equivalent to entire system and are exactly a hood, compare the outside structure of hood with electronic forced draught blower and conveyer pipe setting with prior art, and is more light and handy convenient, is favorable to wearing, desorption and transportation.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

FIG. 1 is a schematic diagram of a prior art electric air supply respiratory protection system;

FIG. 2 is a schematic structural diagram of a shunt mechanism of the prior art;

FIG. 3 is a schematic view of an electrically powered air supply respiratory protection system with a flow diversion mechanism of the present application;

fig. 4 is a schematic structural diagram of a shunt mechanism provided in an embodiment of the present application;

FIG. 5 is a schematic structural diagram of another shunt mechanism provided in the embodiments of the present application;

fig. 6 is a schematic perspective view of a splitter according to an embodiment of the present disclosure;

fig. 7 is an exploded view of a diverter mechanism provided in an embodiment of the present application;

FIG. 8 is a schematic view of a hood according to an embodiment of the present application being worn on a person;

fig. 9 is a schematic structural view of an electric blower provided in the embodiment of the present application;

FIG. 10 is a schematic view of a hood construction according to an embodiment of the present application.

Wherein, in the figures, the respective reference numerals:

1-head covering; 11-gas extraction hole;

2-a filter cartridge;

3-an electric blower; 31-a second connector; 32-a sleeve; 33-a bend; 34-an arm part;

4-a conveying pipe;

5-a flow divider; 51-a shunt port; 52-a convex part; 53-a recess; 54-arc surface; 55-concave arc surface; 56-first connector;

6-tightening the ring; 61-an adjustment member; 62-fixing the sleeve; 63-pulling rope.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

An electrically powered air-supplied respiratory protection system employing the flow-splitting mechanism provided herein will now be described. Referring to fig. 3 and 4, the electric blower respiratory protection system includes a head cover 1, a filter box 2, an electric blower 3 and a flow divider 5, wherein the electric blower 3 and the flow divider 5 are disposed inside the head cover 1. The electric blower 3 is fixed to the neck of a human body, and a delivery pipe 4 for delivering output gas is connected to the electric blower 3, and a flow divider 5 is supported on the inner top of the hood 1 through the delivery pipe 4. The flow divider 5 is provided with a flow dividing port 51 provided around the outer periphery of the flow divider 5. In use, the electric blower 3 continuously sends the purified air to the flow divider 5, and the continuously output air flow can offset the air flow flowing out from the hood 1, so that the interior of the hood 1 forms a positive pressure environment higher than the external atmospheric pressure. The electric blower 3 is fixed to the neck of the human body, and it can be understood that the electric blower 3 is worn on the human body as a wearing member.

Compared with the prior art, the reposition of redundant personnel mechanism on electronic air supply respiratory protection system that this application embodiment provided compares, electronic forced draught blower 3 sets to be located the inside device of wearing on human neck of hood 1, be connected with conveyer pipe 4 on the electronic forced draught blower 3, this conveyer pipe 4 is located the inside of hood 1 and supports reposition of redundant personnel 5 on human top of the head, can replace the structure that the tradition adopted the headstock effectively, also do not have longer conveyer pipe 4 from the outside on inserting hood 1, with this bearing and the outside pulling force of relieving the wearer's head, improve and wear the travelling comfort, reduce the fatigue of wearer, and the work efficiency is improved.

The flow divider 5 is supported on the inner top of the hood 1 by the delivery tube 4 to support and cooperate with the outgoing air flow to open the hood 1. The flow dividing ports 51 on the periphery of the flow dividing member 5 uniformly blow the air flow delivered by the electric blower 3 to the periphery, so that the output air flow uniformly flows downwards along the inner wall of the hood 1 on the head of the wearer, and the pressure of the air flow between the head of the wearer and the inner wall of the hood 1 is uniform; the electric blower 3 continuously outputs clean air flow to the splitter 5, so that a positive pressure environment is formed inside the hood 1, and the wearer is protected from breathing. Therefore, even if the head cover 1 is not supported by a head frame and a hard face screen, the head cover 1 can be kept in a standing state, so that the cover wall of the head cover 1 is kept separated from the head of a human body, and the problem that the cover wall of the head cover 1 positioned in the face area of the human body is easy to collapse to the face of a person can be solved. The problem that the face of the hood wall collapses is solved without adding structures such as a face screen in the hood 1, the structure of the whole protection system is effectively simplified, the whole weight is reduced, and a wearer can wear the hood for a long time.

In addition, this reposition of redundant personnel piece 5 supports at the interior top of hood 1 through conveyer pipe 4, is located the top of human head promptly, shunts the air current of electric blower 3 output, and the end of giving vent to anger among the fungible prior art is located the structure at people brain rear portion, and then avoids continuously blowing the afterbrain of the person of wearing, improves the comfort of wearing effectively.

The utility model provides an electronic air supply respiratory protection system, its essential element's electronic forced draught blower 3, conveyer pipe 4 and reposition of redundant personnel piece 5 all set up in the inside of hood 1, are equivalent to entire system exactly a hood 1, compare with prior art's the structure of setting up electronic forced draught blower 3 and conveyer pipe 4 in hood 1 outside, and be lighter and more handy convenient, be favorable to wearing, desorption and transportation.

The structure of the flow dividing member 5 includes, but is not limited to, the following specific forms:

referring to fig. 4, the flow divider 5 is a flat circular body, and the flow dividing opening 51 of the flow divider 5 is composed of a plurality of air exhaust holes uniformly and alternately arranged on the outer circumference of the flow divider 5, so that the structure is simple, the processing and the forming are easy, the manufacturing cost is low, and the technical effect of uniform flow dividing can be achieved.

Referring to fig. 5, the splitter 5 is a flat star-shaped body, which may preferably be a star-shaped body, the outer circumference of the splitter 5 has a plurality of protrusions 52 extending outward, a concave portion 53 is formed between adjacent protrusions 52, and the splitter 51 is respectively opened on the protrusions 52 and the concave portions 53, thereby improving the splitting effect. The diversion port 51 may preferably be a plurality of exhaust holes arranged uniformly and at intervals, or may be a long hole formed in the convex portion 52 or the concave portion 53.

The flow divider 5 may have other shapes that can achieve uniform discharge of the guided airflow from the outer circumference of the flow divider 5, and is not particularly limited herein.

The flow dividing opening 51 of the flow dividing member 5 may preferably surround an air exhaust gap (not shown) on the outer circumference of the flow dividing member 5 to perform stepless distribution of the output air flow, so as to further improve the flow dividing effect.

In another embodiment of the present application, referring to FIG. 5, the top of the flow divider 5 is arched upward, and the top of the flow divider 5 has an arc surface 54 that interferes with the inner top wall of the hood 1. The top of the hood 1 is supported by the splitter 5, and an arc-shaped hood wall extending in a downward arc is formed, which is beneficial to guiding the airflow output from the splitter opening 51 of the splitter 5. After the system is worn, the electric blower 3 is started, so that the hood 1 is rapidly inflated and forms a positive pressure environment, and the hood can be rapidly in a working state.

Preferably, referring to fig. 6, the bottom of the shunt 5 further has a concave arc surface 55 adapted to the shape of the top of the head of the human body, so as to better fit the head shape of the human body.

Wherein, this reposition of redundant personnel piece 5 can be preferred to be made by silica gel, ABS, PVC or other suitable materials, lets reposition of redundant personnel piece 5 have certain structural strength and light and handy, can enough prop hood 1 open, especially with hood 1 rapid bulge under the cooperation of output gas, can reduce the pressure to human head again, improves the travelling comfort of wearing.

In another embodiment of the present application, referring to fig. 4, 5 and 7, the conveying pipe 4 is preferably a universal pipe formed by connecting a plurality of movable members in sequence. Specifically, the conveying pipe 4 can preferably adopt a universal plastic cooling pipe, which is called an adjustable plastic cooling pipe, is made of high-quality engineering plastics, is widely applied to the industrial field, and is used as a comprehensive drainage component for liquid and compressed air on a production line. The moving parts on the pipe body are manufactured by using a precise injection molding process, nodes are formed between the adjacent moving parts, and each node is connected with the contact curved surface and is manufactured by using a high injection molding technology through precise calculation. Therefore, the pipe body does not need to be additionally provided with a guide pipe, the pipe body can have excellent sealing performance only by contacting with a curved surface, and the pipe body has supporting strength and can play a certain shaping role. Therefore, the duct 4 is preferably a universal tube as described above, and can be bent into an arc shape matching the curve of the hindbrain of the human body, and functions to support the head mask 1. In addition, this conveyer pipe 4 can play the supporting role as the support to reposition of redundant personnel 5, and then alleviates the pressure to the wearer's head, lets the wearer can wear this protection system for a long time.

Wherein, the electric blower 3 is provided with at least two conveying pipes 4, and the at least two conveying pipes 4 extend upwards in parallel to form a double-pipe supporting structure. The supporting effect of the flow dividing piece 5 can be improved, the flow dividing piece 5 can be stably supported at the inner top of the hood 1, a gas flow passage which is transmitted to the flow dividing piece 5 from the electric blower 3 can be increased, and the power of output gas flow is improved; further, the range of opening of the hood 1 can be increased, and the stability of the inflated shape of the hood 1 can be maintained.

Preferably, the delivery tube 4 extends to the top of the hood 1 to a height above the top of the head of the person so that the hood 1 does not rest on the top of the wearer's head. The head of the wearer is not used as a bearing point of the shunt piece 5, so that the wearing comfort is improved, and the fatigue of the wearer caused by long-time wearing is reduced.

In addition, referring to fig. 7, the splitter 5 is provided with the same number of first connectors 56 as the number of the conveying pipes 4, the electric blower 3 is provided with the same number of second connectors 31 parallel to the number of the conveying pipes 4, and two ends of the conveying pipes 4 are respectively connected with the first connectors 56 and the second connectors 31. Let electric air feeder 3, reposition of redundant personnel piece 5 and conveyer pipe 4 be dismantled and assembled subassembly, can disinfect cleanness electric air feeder 3, reposition of redundant personnel piece 5 and conveyer pipe 4 respectively, be favorable to used repeatedly, reduce used repeatedly's risk.

In another embodiment of the present application, referring to fig. 3 and 8, a ventilation hole 11 is formed on the hood 1, and a sleeve 32 communicating with the outside of the hood 1 through the ventilation hole 11 is disposed on the electric blower 3. The filter cartridge 2 is disposed outside the head housing 1 and is detachably connected to the electric blower 3 and connected to the sleeve 32. Wherein, the filter box 2 can be arranged in the hood 1 and connected with the sleeve 32 on the electric blower 3; or, it is built in the electric blower 3. Therefore, the arrangement form of the filter box 2 can be set according to the actual production and application requirements.

In another embodiment of the present application, referring to fig. 3 and 9, the electric blower 3 is preferably a U-shaped body capable of being worn on the neck of a human body, i.e. a structure similar to a neck band or a neck pillow, and the electric blower 3 includes a bending portion 33 and arm portions 34 connected to both ends of the bending portion 33. When worn, the bending portion 33 is attached to the back of the neck of the human body, and the two arm portions 34 are located on the two sides of the neck of the human body. The whole electric blower 3 is surrounded outside the neck of the human body, so that the wearing or the removal of the wearer is facilitated.

In another embodiment of the present application, referring to fig. 3, 8 and 10, a tightening ring 6 for tightening the wall of the hood 1 on the human body is provided outside the hood 1, the tightening ring 6 is located below the electric blower 3, and the tightening ring 6 has an adjusting member 61 for adjusting the tightness of the tightening ring 6. In this embodiment, the tightening ring 6 comprises a fixing sleeve 62 fixed to the outer wall of the hood 1, the fixing sleeve 62 preferably being an annular sleeve located below the electric blower 3 and surrounding the outer wall of the hood 1 by one turn. A pull rope 63 is sleeved in the fixed sleeve 62, and an opening for the pull rope 63 to penetrate out is further formed in the fixed sleeve 62. The adjustment element 61 may preferably be a resilient buckle, which may preferably be a plastic snap buckle, and is arranged on the pull cord 63 extending through the opening. After the wearer wears the head cap 1, the pull string 63 can be tightened or loosened by the adjusting member 61 located outside the head cap 1, thereby adjusting the tightness of the wall of the head cap 1 with the human body. During removal, the wearer can operate the adjustment element 61 from the outside of the hood 1 to release the tightening ring 6, so as to facilitate the rapid removal of the protection system, reducing the pollution of the wearer to the environment in the removal environment, and thus reducing the risk of infection to other persons in the removal environment.

It should be noted that, because electric blower 3 down last the continuous transport can let on reposition of redundant personnel 5 the inside air flow that forms and is higher than outside atmospheric pressure of hood 1 to at the inside air current free outflow of above-mentioned straining ring 6 restriction hood 1, let the inside malleation environment that forms of hood 1, can prevent effectively not through filterable outside air, pathogen and pathogen aerosol etc. inside scurrying into hood 1 from straining ring 6's tightening region, reduce effectively that electric blower 3, conveyer pipe 4 and reposition of redundant personnel 5 that are located hood 1 inside are polluted, are favorable to used repeatedly after the disinfection and cleaning.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. A flow dividing mechanism is arranged in a hood of an electric air supply respiratory protection system and is characterized in that the flow dividing mechanism comprises an electric air supply blower and a flow dividing piece, the electric air supply blower is fixed on the neck of a human body, a conveying pipe for conveying output gas is connected to the electric air supply blower, and the flow dividing piece is supported at the top of the hood through the conveying pipe; be equipped with the diffluence pass that encircles the diffluence piece periphery and set up on the diffluence piece, electric blower down last the continuous transport of diffluence piece can let the inside air flow that is higher than outside atmospheric pressure that forms of hood.

2. The flow divider mechanism of claim 1, wherein the flow divider is a flat circular body, and the flow dividing opening of the flow divider is composed of a plurality of air exhaust holes uniformly and alternately arranged on the outer circumference of the flow divider.

3. The shunt mechanism according to claim 1, wherein the shunt member is a flat star-shaped body, the outer circumferential ring of the shunt member has a plurality of protrusions extending outward, a concave portion is formed between adjacent protrusions, and the protrusions and the concave portions are respectively provided with the shunt ports.

4. The diverter mechanism according to claim 1, wherein the diverter opening is a vent gap around an outer circumference of the diverter.

5. The flow divider mechanism of claim 1, wherein the top of the flow divider is upwardly arched and has an arcuate surface that interferes with the interior top wall of the hood.

6. A flow divider mechanism according to any one of claims 1 to 5, wherein the duct is a universal tube formed by a plurality of movable members connected in series.

7. The flow distribution mechanism of claim 6, wherein the electric blower is provided with at least two conveying pipes, the at least two conveying pipes extend upwards in parallel, and the height of the conveying pipes extending towards the top of the hood is higher than the top of the head of the human body.

8. The flow dividing mechanism according to claim 7, wherein the flow dividing member is provided with a first connector which is the same as the conveying pipe in number, the electric blower is provided with a second connector which is the same as the conveying pipe in number and is arranged in parallel, and two ends of the conveying pipe are respectively connected with the first connector and the second connector.

9. An electric air supply respiratory protection system is characterized by comprising a head cover, a filter box and the flow dividing mechanism according to any one of claims 1 to 8, wherein the head cover is provided with an air collecting hole, and the electric air feeder is provided with a sleeve communicated with the outside of the head cover through the air collecting hole; the filter box is arranged in the electric blower or detachably connected to the electric blower.

10. The electric blower respiratory protection system of claim 9, wherein the electric blower is a U-shaped body that can be worn around the neck of a person, the electric blower including a curved portion and arm portions connected to both ends of the curved portion; the outside of hood is equipped with the straining ring that the cover wall of hood tightens up on the human body, the straining ring is located the below of electric blower, just have the regulation on the straining ring the regulating part of straining ring elasticity.

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