Powered air-purifying respirator

Abstract

The present invention relates to the technical field of respirators, and discloses a powered air-purifying respirator, which is characterized by comprising: an open-face mask, in which there is an air guiding channel, the tail of the open-face mask has an air inlet, the head of the open-face mask has an air outlet, and the air inlet and the air outlet are connected through the air guiding channel; a blower, in which there is an air supply channel, a blower motor is arranged in the air supply channel, the blower motor is connected with an air impeller, a filtering structure is further arranged on the blower, the filtering structure is arranged opposite to the air impeller, an air supply port is arranged on the blower, and the air supply port communicates with the air supply channel; an air supply pipe, one end of the air supply pipe is connected to the air supply port, and the other end of the air supply pipe is connected to the air inlet. The powered air-purifying respirator provided by the technical solution of the present invention can be breathable and ventilated during use, and is more comfortable.

Description

Technical Field

[0001] This invention patent relates to the technical field of respirators, and more specifically, to a powered air-purifying respirator. Background Art

[0002] During the epidemic outbreak, many medical staff entered the front line of the fight against the epidemic. To avoid self-infection of medical staff, they need to wear layers of protective clothing for full body protection and then enter the medical work.

[0003] Currently, when wearing protective clothing, the protective personnel need to wear gloves, masks, goggles, surgical caps, protective coats, etc., with layers of protection to avoid contact between germs and medical staff and prevent infection.

[0004] However, in the hot summer, the inside of the protective clothing is airtight and not ventilated. Moreover, when medical staff wear it, their faces and heads are bruised by goggles and masks, and the visors fog up. And the entire medical work time is extremely long. Working in a humid and hot environment is extremely likely to cause discomfort to medical staff and is not suitable for long-term wearing. Summary of the Invention

[0005] The purpose of the present invention is to provide a powered air-purifying respirator, aiming to solve the problem in the prior art that long-term wearing of protective clothing is likely to cause discomfort to medical staff.

[0006] The present invention is implemented as follows. A powered air-purifying respirator includes:

[0007] An open-face mask, which has an air guiding channel inside. The tail of the open-face mask has an air inlet, and the head of the open-face mask has an air outlet. The air inlet and the air outlet are connected through the air guiding channel;

[0008] A blower, which has a air supply channel inside. A blower motor is provided in the air supply channel. The blower motor is connected with an air impeller. A filtering structure is also provided on the blower. The filtering structure is arranged opposite to the air impeller. A air supply port is provided on the blower, and the air supply port is communicated with the air supply channel;

[0009] An air supply duct, one end of which is connected to the air supply port, and the other end of which is connected to the air inlet.

[0010] Optionally, the blower has a filter chamber. The air impeller is located on the inner wall of the filter chamber. The filtering structure is a filter element, and the filter element is placed in the filter chamber.

[0011] Optionally, a filter chamber is provided inside the blower, the impeller is located on the inner wall of the filter chamber, filter holes are provided on the outer sidewall of the blower, the filter holes communicate with the filter chamber, the filtering structure is an aluminum can, and the mouth of the aluminum can is connected to the filter holes.

[0012] Optionally, one end of the air supply duct is detachably connected to the air supply port, and the other end of the air supply duct is detachably connected to the air inlet.

[0013] Optionally, a first docking interface is formed at one end of the air supply duct, a docking block protrudes from the sidewall of the first docking interface, a docking groove facing the air supply duct is provided on the sidewall of the air supply port, the docking groove includes an embedding groove and a clamping groove, the embedding groove communicates with the clamping groove, the embedding groove faces the air supply duct and extends in a direction away from the air supply duct, the clamping groove extends horizontally, the first docking interface is embedded in the air supply port, and the docking block is placed in the clamping groove.

[0014] Optionally, a second docking interface is formed at the other end of the air supply duct, a fastening ring is provided around the outer periphery of the second docking interface, both ends of the other end of the air supply duct are open, the fastening ring is partially embedded in the openings on both sides of the other end of the air supply duct and forms a fixing portion, pressing portions are formed on both outer sides of the fastening ring, fixing notches are formed on both sides of the air inlet, the air inlet is embedded in the second docking interface, and the fixing portion is clamped in the fixing notch.

[0015] Optionally, a rotatable wind direction adjusting piece is provided at the air outlet.

[0016] Optionally, a window cover is provided on the open face mask, and both ends of the window cover are respectively rotatably connected to both ends of the open face mask.

[0017] Optionally, a protective cloth body is connected to the outer periphery of the window cover.

[0018] Optionally, the blower has a perforation for a waistband to pass through.

[0019] Compared with the prior art, for the powered air-purifying respirator provided by the present invention, when the air supply motor rotates, it drives the air impeller to rotate, sucking in air. And the air passes through the filtering structure to achieve air purification, preventing foreign impurities or bacteria from entering. Then, through the air supply channel and the air guiding channel, the purified air is discharged from the air outlet for the user to inhale. When used for medical protection, the air is discharged from the air outlet, making the inside of the protective clothing breathable and ventilated, the viewing window not easy to fog up, and not causing constriction to the user. Compared with the prior art, the powered air-purifying respirator provided by the present invention is breathable and ventilated during use, can be worn for a long time, and is more comfortable. It solves the problem in the prior art that long-term wearing of protective clothing is likely to cause physical discomfort to medical staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 FIG. is a three-dimensional schematic diagram of an open-face mask of the powered air-purifying respirator provided by the present invention;

[0021] Figure 2 FIG. is a cross-sectional schematic diagram of an open-face mask of the powered air-purifying respirator provided by the present invention;

[0022] Figure 3 FIG. is a three-dimensional schematic diagram of a blower of the powered air-purifying respirator provided by an embodiment of the present invention;

[0023] Figure 4 FIG. is an exploded schematic diagram of a blower of the powered air-purifying respirator provided by an embodiment of the present invention;

[0024] Figure 5 FIG. is a three-dimensional schematic diagram of a blower of the powered air-purifying respirator provided by another embodiment of the present invention;

[0025] Figure 6 FIG. is an exploded schematic diagram of a blower of the powered air-purifying respirator provided by another embodiment of the present invention;

[0026] Figure 7 FIG. is a schematic diagram of the usage state of the open-face mask of the powered air-purifying respirator provided by the present invention with a protective cloth body. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] The implementation of the present invention will be described in detail below with reference to specific embodiments.

[0029] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and cannot be construed as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0030] Referring to Figures 1 to 7 as shown, it is a preferred embodiment provided by the present invention.

[0031] In an embodiment of the present invention, the powered air-purifying respirator includes:

[0032] An open-face mask 10, which has a wind guiding channel 10a inside. The tail of the open-face mask 10 has an air inlet 15, and the head of the open-face mask 10 has an air outlet 14. The air inlet 15 and the air outlet 14 are connected through the wind guiding channel 10a;

[0033] A blower 40, which has a air supply channel inside. A blower motor is provided in the air supply channel. The blower motor is connected with an air impeller. A filtering structure is also provided on the blower 40. The filtering structure is arranged opposite to the air impeller. A air supply port is provided on the blower 40, and the air supply port is communicated with the air supply channel;

[0034] An air supply duct 30, one end of the air supply duct 30 is connected to the air supply port, and the other end of the air supply duct 30 is connected to the air inlet 15.

[0035] The above-mentioned open-face mask 10 is worn on the head, and its air outlet 14 is arranged towards the inside of the open-face mask 10. In this embodiment, the wind guiding channel 10a is the cavity inside the open-face mask 10. In other embodiments, the wind guiding channel 10a can also be a pipe structure, which will not be elaborated.

[0036] The above-mentioned blower 40 is used to suck the external air and is installed outside to achieve air circulation.

[0037] In this embodiment, the rotation of the air supply motor drives the rotation of the air impeller to suck in air. Moreover, the air passes through the filtering structure to achieve air purification, preventing foreign impurities or bacteria from entering. Then, the purified air is discharged from the air outlet 14 through the air supply channel and the air guiding channel 10a for the user to inhale. When used for medical protection, the air is discharged from the air outlet 14, making the inside of the protective clothing breathable and ventilated, the window is not prone to fogging, and it will not cause abrasions to the user. Compared with the prior art, the powered air-purifying respirator provided by the present invention is breathable and ventilated during use, can be worn for a long time, and is more comfortable.

[0038] This embodiment takes the medical use as an example. Of course, according to the usage requirements, the powered air-purifying respirator provided by the present invention can also be used in industrial and other fields without limitation.

[0039] Please refer to Figure 3 and Figure 4 In an embodiment of the present invention, the blower 40 has a filter chamber, the air impeller is located on the inner wall of the filter chamber, the filtering structure is a filter element 411, and the filter element 411 is placed in the filter chamber.

[0040] The blower 40 includes a body 43 and a first housing 41. The body 43 and the first housing 41 are detachably connected. The body 43 has a filter groove. After the first housing 41 is connected to the body 43, it covers the filter groove to obtain a filter chamber. The filter element 411 is placed in the filter chamber, and the inner wall of the filter chamber has a positioning ring. The contour shape of the positioning ring is the same as that of the filter element 411. The inside of the filter element 411 is docked with the positioning ring, and the filter element 411 is pressed against the outside of the filter element 411 by the first housing 41 to achieve the space tightness between the filter element 411 and the air impeller, ensuring that the inhaled air first passes through the filter element 411. In this embodiment, there is a ventilation gap at the bottom of the first housing 41 and the body 43, and the ventilation gap communicates with the filter chamber to facilitate the inhalation of external air.

[0041] In addition, in this embodiment, a detection circuit board is provided on the filter element 411. The detection circuit board has contacts and a detection chip storing the effective time information of the filter element 411. A detection contact extends inside the filter chamber. When the filter element 411 is installed, the contacts of the detection circuit board are docked with the detection contacts in the filter chamber, and the main control board is electrically connected to the detection circuit board, so as to detect whether the filter element 411 is installed. At the same time, after the filter element 411 is installed, the main control board reads the information of the effective time of the filter element 411 from the detection chip to determine whether the filter element 411 is within the valid period. If it exceeds the valid period, the filter element 411 may have quality problems such as blockage. At this time, the staff will be reminded in time to replace the filter element 411. Moreover, after the above detections are all passed, that is, the filter element 411 is installed and within the valid time, the usage duration of the filter element 411 can be written into the main control board through the detection chip. When the usage time of the filter element 411 reaches the preset time, a warning will be issued.

[0042] Moreover, in this embodiment, the filter element 411 includes a filter body and a filter housing. The filter housing wraps the filter body. One end of the filter housing protrudes outward to form a detection portion. The detection portion opens towards the inner wall of the filter cavity to form a detection groove, and the detection circuit board is embedded in the detection groove.

[0043] The front shell or the rear shell of the filter housing has a plurality of hollow holes to allow air to enter the filter body. By protruding a detection portion on one side of the filter housing for detection without affecting the normal filtering effect of the filter body. In addition, two convex columns are provided at the bottom of the detection groove, and two concave holes are formed at the end of the conductive sheet. The two convex columns are embedded in the two concave holes to fix the detection circuit board.

[0044] In other embodiments, in order to detect the presence or absence of the filter element 411, the first detection contact can be a push switch, and the second detection contact is a pressing member. When the filter element 411 is placed in the filter cavity, the pressing member abuts against the push switch to achieve detection.

[0045] In addition, in order to achieve the detachable connection between the above-mentioned body 43 and the first housing 41, one side of the first housing 41 has a first hook, and one side wall of the corresponding filter slot has a first hole. The first hook is engaged in the first hole. The other side of the first housing 41 has a second hook. The body 43 has a disassembly slot opening towards the first housing 41. The disassembly slot extends towards the side of the body 43 and opens. A disassembly member 431 is movably provided in the disassembly slot. A spring is connected between the disassembly member 431 and the side wall of the disassembly slot. The disassembly member 431 moves along one side of the body 43 to the other side. A second hole is provided on the disassembly member 431. The second hook is engaged in the second hole, and the hook portion of the second hook is arranged towards the side wall of the disassembly slot connected with the spring. The spring makes the disassembly member 431 tend to move away from the side wall of the disassembly slot connected with the spring, so as to prevent the second hook from disengaging and achieve the stable connection of the first housing 41. When disassembly is required, by pressing the disassembly member 431, the second hook can be disengaged from the second hole to achieve disassembly, which is convenient for installation or disassembly. Moreover, in order to prevent the disassembly member 431 from disengaging from the side of the body 43, a limiting groove is provided at the bottom of the disassembly slot, and a limiting block protrudes from the disassembly member 431. The limiting block is embedded in the limiting groove. When the spring presses the disassembly member 431, the limiting block presses the side wall of the limiting groove.

[0046] Please refer to Figure 5 and Figure 6 In another embodiment of the present invention, a filter cavity is provided in the fan 40. The wind impeller is located on the inner wall of the filter cavity. Filter holes 42a are provided on the outer side wall of the fan 40. The filter holes 42a communicate with the filter cavity. The filtering structure is an aluminum can, and the can mouth of the aluminum can is connected to the filter holes 42a.

[0047] The blower 40 includes a body 43 and a second housing 42. The body 43 and the second housing 42 are detachably connected. After the second housing 42 is connected to the body 43, it covers the filter tank to form a filter chamber. There are two such filter holes 42a, which are located on both sides of the second housing 42, and the internal filter chamber is only communicated with the outside through the filter holes 42a. The side wall of the filter hole 42a has internal threads, and the aluminum can is installed and fixed by threadedly connecting with the external threads at the mouth of the aluminum can.

[0048] Moreover, the inner side wall of the second housing 42 has a docking shell, and the above-mentioned positioning ring is docked to the docking shell. When installing the filter can 421, through the docking of the docking shell and the positioning ring, the space in the filter chamber is sealed, ensuring that air must first pass through the filter can 421 for filtration. In this embodiment, the second housing 42 protrudes towards the body 43 with a clamping plate, and the clamping plate is arranged around the docking shell, so that the docking shell is stably fixed on the inner side wall of the second housing 42.

[0049] In addition, to ensure the normal use of the filter can 421 and prevent random alarms, a detection circuit board is also provided on the docking shell of the second housing 42. Its structure refers to the detection circuit board of the above-mentioned filter element 411 and will not be elaborated here.

[0050] In this embodiment, the detachable connection between the second housing 42 and the body 43 can refer to the detachable connection method between the first housing 41 and the body 43 and will not be elaborated here. In this way, according to actual usage requirements, the filter element 411 and the filter can 421 can be replaced correspondingly to suit different filtration structures, which is convenient for use.

[0051] Please refer to Figure 4 and Figure 6 In an embodiment of the present invention, the air supply motor is electrically connected to the main control board in the blower 40, and a buzzer is provided on the side wall of the air supply channel. The buzzer is electrically connected to the main control board. When a fault such as a failure of the air supply motor of the blower 40 or the filter element 411 being used for too long occurs, a warning is given, and an alarm is issued through the buzzer. Since the buzzer is located in the air supply channel, in this way, the sound can be propagated along the air supply channel, the air supply pipe 30, and the air guiding channel 10a to give an alarm in time, avoiding the situation where a fault cannot be detected in a closed environment.

[0052] In this embodiment, the air supply channel includes a suction part and a blowing part. The air impeller is arranged in the suction part. The suction part is communicated with the blowing part. The blowing part surrounds the suction part and gradually moves away from the center of the suction part. The end of the blowing part away from the adsorption part is communicated with the air outlet.

[0053] In this way, the wind impeller rotates at the air suction part, sucks in the wind, and then sends the wind to the air supply part, thereby realizing blowing. Specifically, the wind impeller includes a front wind plate and a rear wind plate. There are multiple fan blades arranged at intervals and obliquely between the front wind plate and the rear wind plate. The middle parts of the front wind plate and the rear wind plate are penetrated, and the rotating shaft of the air supply motor is connected to the rear wind plate. In this way, the middle part of the wind impeller is the air inlet, and the outer periphery is the air outlet, so that the air supply efficiency of the air supply port is higher.

[0054] In addition, the above buzzer is arranged on the side wall of the air suction part. Since the wind impeller discharges air from the outer periphery, in order to avoid the influence of the discharged air on the buzzer, the buzzer is arranged on the side wall of the air suction part to ensure the normal use of the buzzer.

[0055] Furthermore, there is a groove on the side wall of the air suction part, and the buzzer is fixed in the groove. In this way, it avoids the rubbing of the buzzer by the wind impeller during rotation, and further ensures the normal use of the buzzer. Specifically, there is an annular groove in the adsorption part, and the annular groove is arranged opposite to the wind impeller, and the above groove communicates with the annular groove.

[0056] Of course, in other embodiments, according to the usage requirements, the buzzer can also be arranged at the air supply part, which will not be elaborated here.

[0057] Based on the above embodiment, there is a through hole on the side wall of one side of the groove. The main control board and the buzzer are electrically connected by a wire harness, and the wire harness passes through the through hole.

[0058] In this way, the electrical connection of the buzzer is realized, and since the buzzer is located at the air suction part, the wind blown by the wind impeller will not pass through the through hole, ensuring the normal air supply of the blower 40.

[0059] In this embodiment, the main control board is arranged at the top inside the blower 40, the above groove is also located at the position of the adsorption part close to the top of the blower 40, and the through hole on the side wall of the groove is also arranged upward to facilitate the connection of the wire harness.

[0060] Please refer to Figure 4 and Figure 6 , in an embodiment of the present invention, the body 43 includes a front shell, an inner shell and a rear shell. The front shell is connected to the rear shell, and the inner shell is located between the front shell and the rear shell. The front shell and the inner shell are connected to form an air supply channel. The front shell is formed with a filter groove, and the rear shell is formed with a groove.

[0061] After the front shell and the rear shell are butted, they are connected by screws. After the front shell and the inner shell are butted, they are also fixed by screw connection. The rear shell forms the above annular groove and groove to facilitate the wire harness to pass through.

[0062] In addition, there is a gap between the impeller and the rear shell, so as to ensure the stable rotation of the impeller and ensure that the buzzer can emit sound from the gap to the air outlet, and then transmit it to the enclosed space of the user, so as to facilitate detection and alarm.

[0063] In addition, a light alarm structure is also provided in the fan 40, and the light alarm structure is electrically connected to the main control board. The light alarm structure can be used to give an alarm by flashing lights, so as to provide a timely warning. In another embodiment, a vibration motor can also be provided in the fan 40, and the vibration motor is electrically connected to the main control board. When an abnormal working state occurs, the fan 40 is vibrated by the vibration motor to alert the user.

[0064] In one embodiment of the present invention, a power switch and a wind speed adjustment button are provided on the top of the body 43 of the fan 40. The fan 40 is turned on by the power switch, and the speed of rotation of the air supply motor can be adjusted accordingly by the fan adjustment button to adjust the air supply speed.

[0065] Furthermore, in order to realize the power supply of the fan 40, a power supply battery 44 is detachably connected to the bottom of the body 43 of the fan 40, the bottom of the body 43 has a power supply slot, the bottom of the power supply slot has a connecting terminal, and the top of the power supply battery 44 has a connecting piece. Through the docking of the connecting terminal and the connecting piece, the power supply battery 44 is electrically connected to the main control board in the body 43 to realize power supply. In addition, a first card strip is provided on one side of the power supply battery 44, and a retractable second card strip is provided on the other side. Card slots are provided on both sides of the power supply slot, and the first card strip and the second card strip are respectively embedded in the two card slots to realize the power supply battery 44 being plugged and fixed in the power supply slot. In addition, in order to facilitate disassembly, the second card strip is connected to a pressing block, and the second card strip can be pressed by the pressing block to make the second card strip detach from the card slot, thereby realizing disassembly, so as to facilitate installation and disassembly.

[0066] In addition, in order to facilitate wearing of the blower 40, the blower 40 has a perforation 401, and the perforation 401 is used for passing a belt through the blower 401. The belt is fixed to the waist of the user for easy movement.

[0067] Specifically, connecting plates protrude from both sides of the fan 40 , and the two connecting plates respectively have through-holes 401 , and the belt can be threaded and fixed through the through-holes 401 of the connecting plates on both sides, so as to facilitate stable wearing of the fan 40 .

[0068] Please refer to Figures 3 to 6 In one embodiment of the present invention, one end of the air supply duct 30 is detachably connected to the air supply port, and the other end of the air supply duct 30 is detachably connected to the air inlet 15 .

[0069] In this way, the two ends of the air supply duct 30 can be quickly disassembled and assembled, which is convenient for installation and wearing and disassembly and removal for easy use.

[0070] Specifically, in this embodiment, one end of the air supply duct 30 is formed with a first docking port 31. A docking block 311 protrudes from the side wall of the first docking port 31. The side wall of the air supply opening has a docking groove opening towards the air supply duct 30. The docking groove includes an embedding groove and a clamping groove. The embedding groove communicates with the clamping groove. The embedding groove opens towards the air supply duct 30 and extends in a direction away from the air supply duct 30. The clamping groove extends horizontally. The first docking port 31 is embedded in the air supply opening, and the docking block 311 is placed in the clamping groove.

[0071] During installation, the first docking port 31 is inserted into the air supply opening. The docking block 311 is embedded in the docking groove and moves along the embedding groove to the clamping groove as the first docking port 31 is inserted. Then, the first docking port 31 is selected, and the docking block 311 moves to be clamped in the clamping groove. During disassembly, the reverse operation can be performed, and the disassembly is convenient. In this embodiment, the opening of the embedding groove faces outward and is flared to facilitate the insertion of the docking block 311. Moreover, the clamping groove is in a shape of a check mark bent towards the air supply duct 30. In this way, it can further prevent the docking block 311 from directly sliding out of the docking groove and ensure stable docking. At the same time, there are two such docking blocks 311, which are enclosed on both sides of the first docking port 31, and the corresponding docking grooves are also two to ensure stable fixation. According to needs, the number is not limited and will not be elaborated further.

[0072] In another embodiment, the detachable connection method between the first docking port 31 and the air supply opening can also refer to the detachable connection method between the following second docking port 32 and the air inlet 15, and will not be elaborated further.

[0073] Please refer to Figure 1 and Figure 2 , in addition, the other end of the air supply duct 30 is formed with a second docking port 32. A fastening ring 321 is provided around the outer circumference of the second docking port 32. Both sides of the other end of the air supply duct 30 are open. The fastening ring 321 is partially embedded in the openings on both sides of the other end of the air supply duct 30 and forms a fixing portion 3211. Pressing portions 3212 are formed on both outer sides of the fastening ring 321. Fixing notches are formed on both sides of the air inlet 15. The air inlet 15 is embedded in the second docking port 32, and the fixing portion 3211 is clamped in the fixing notches.

[0074] The above-mentioned fixed notch is an annular notch to ensure that the second pair of interfaces 32 can be stably connected to the air inlet 15 at any position. By pressing the pressing part 3212, the fastening ring 321 undergoes elastic deformation, and the fixing part 3211 disengages from the fixed notch, enabling disassembly. In this embodiment, the pressing part 3212 is arranged opposite to the fixing part 3211. A support plate protrudes from the side wall of the second pair of interfaces 32. The middle of the pressing plate is placed on the support plate. One end of the pressing plate is connected to the fastening ring 321, and the other end of the pressing plate is arranged vacant. By pressing the vacant end of the pressing plate, the end of the pressing plate connected to the fastening ring 321 is lifted, so that the fixing part 3211 can move towards the side wall of the second pair of interfaces 32 for easy installation or disassembly. In another embodiment, the pressing part 3212 can be the other two sides of the fastening ring 321. By squeezing the pressing part 3212 on the fastening ring 321, the pressing part 3212 can move towards the side wall of the second pair of interfaces 32 to achieve installation or disassembly.

[0075] In yet another embodiment, the detachable connection manner between the second pair of interfaces 32 and the air inlet 15 can also refer to the detachable connection manner between the first pair of interfaces 31 and the air supply port, which will not be elaborated here.

[0076] Please refer to Figure 1 and Figure 2 , in an embodiment of the present invention, a rotatable wind direction adjusting piece 141 is provided at the air outlet 14.

[0077] Specifically, two brackets are provided on both sides of the air outlet 14. Adjusting rotation protrusions protrude from both ends of the wind direction adjusting piece 141, and the adjusting rotation protrusions are embedded in the holes of the brackets to achieve rotation. By rotating the wind direction adjusting piece 141, the wind direction of the air blown out from the air outlet 14 can be adjusted to be more comfortable and convenient to use. Moreover, each end of the wind direction adjusting piece 141 respectively has a first adjusting limit block and a second adjusting limit block. Correspondingly, a limit plate protrudes on the bracket. During the rotation of the wind direction adjusting piece 141, the first adjusting limit block or the second adjusting limit block will abut against the limit plate to limit the rotation of the wind direction adjusting piece 141.

[0078] In addition, a window cover 11 is provided on the open-face mask 10, and both ends of the window cover 11 are respectively rotatably connected to both ends of the open-face mask 10.

[0079] The window cover 11 is transparent, and through this window cover 11, it is convenient for the user to view the outside. Compared with wearing an eye mask, it will not cause damage to the edge of the eyes and is more comfortable to use.

[0080] Specifically, one end of the window shield 11 protrudes towards the open-face mask 10 with a rotating block. One end of the open-face mask 10 forms a rotating hole. The rotating block is embedded in the rotating hole, and the end of the rotating block has a rotating disk. The rotating disk has a plurality of tooth-shaped protrusions arranged in a ring. The bottom of the rotating hole has a plurality of tooth-shaped grooves arranged in a ring. The rotating disk is docked with the bottom of the rotating hole, and the tooth-shaped protrusions are embedded in the tooth-shaped grooves. In this way, it is ensured that the window shield 11 can be stably arranged at any rotating position.

[0081] Moreover, in order to facilitate the wearing of the open-face mask 10, a wearing strip 12 is provided inside the open-face mask 10. The wearing strip 12 is arranged in a ring inside the open-face mask 10, and the wearing strip 12 extends downward with a fastening strip 13. There is a hollow cavity for people to wear between the fastening strip 13 and the wearing strip 12 to avoid direct contact with the open-face mask 10. In addition, a fastener 131 is provided on the fastening strip 13. The fastener 131 can tighten or loosen the fastening strip 13 to ensure stable wearing.

[0082] Please refer to Figure 1 , Figure 2 and Figure 7 . In an embodiment of the present invention, a protective cloth body 111 is connected to the outer periphery of the window shield 11.

[0083] Through the protective cloth body 111, it is ensured that after wearing the open-face mask 10, external air will not enter from the open-face mask, avoiding the entry of non-filtered air. Specifically, the protective cloth body 111 is connected to the outer edge of the window shield 11 to achieve sealing. During use, the protective cloth body 111 tightly sleeves the outer periphery of the human face. After the fan 40 is turned on, the air pressure inside the open-face mask is higher than the outside. Under positive pressure, air will only flow from the inside to the outside, achieving ventilation and preventing non-filtered air from entering. In addition, in an embodiment, the protective cloth body 111 can also be an integral structure with the protective outer cover to ensure the use safety of the user.

[0084] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A powered air-purifying respirator, characterized in that, Comprising: An open - face mask, within which there is an air - guiding channel. The tail of the open - face mask has an air inlet, and the head of the open - face mask has an air outlet. The air inlet and the air outlet are connected through the air - guiding channel; A blower, within which there is a air - supply channel. Inside the air - supply channel, there is an air - supply motor. The air - supply motor is connected to an air impeller. The blower is also provided with a filtering structure, which is arranged opposite to the air impeller. The blower is provided with an air - supply port, and the air - supply port communicates with the air - supply channel; An air - supply duct, one end of the air - supply duct is connected to the air - supply port, and the other end of the air - supply duct is connected to the air inlet; One end of the air - supply duct is detachably connected to the air - supply port, and the other end of the air - supply duct is detachably connected to the air inlet; One end of the air - supply duct forms a first docking interface. On the side wall of the first docking interface, there protrudes a docking block. The side wall of the air - supply port has a docking groove opening towards the air - supply duct. The docking groove includes an embedding groove and a clamping groove. The embedding groove communicates with the clamping groove. The embedding groove opens towards the air - supply duct and extends in a direction away from the air - supply duct. The clamping groove extends horizontally. The first docking interface is embedded in the air - supply port, and the docking block is placed in the clamping groove; The other end of the air - supply duct forms a second docking interface. An outer peripheral ring of the second docking interface is provided with a fastening ring. Both sides of the other end of the air - supply duct are open. The fastening ring is partially embedded in the openings on both sides of the other end of the air - supply duct and forms a fixing part. On both outer sides of the fastening ring, there are formed pressing parts. On both sides of the air inlet, there are formed fixing notches. The air inlet is embedded in the second docking interface, and the fixing part is clamped in the fixing notch; The fixing notch is an annular notch. The pressing part and the fixing part are arranged oppositely. On the side wall of the second docking interface, there protrudes a support plate. The middle of the pressing part is placed on the support plate. One end of the pressing part is connected to the fastening ring, and the other end of the pressing part is in a vacant arrangement. By pressing the vacant end of the pressing part, the end of the pressing part connected to the fastening ring is lifted, so that the fixing part moves towards the side wall of the second docking interface, facilitating installation or disassembly.

2. The powered air purifying respirator according to claim 1, wherein Inside the blower, there is a filter cavity. The air impeller is located on the inner wall of the filter cavity. The filtering structure is a filter element, and the filter element is placed in the filter cavity.

3. The powered air-purifying respirator according to claim 1, wherein Inside the blower, there is a filter cavity. The air impeller is located on the inner wall of the filter cavity. The outer side wall of the blower is provided with filter holes, and the filter holes communicate with the filter cavity. The filtering structure is a filter can, and the mouth of the filter can is connected to the filter holes.

4. A powered air-purifying respirator according to any one of claims 1 to 3, characterized in that, At the air outlet, there is a rotatable wind - direction adjusting piece.

5. A powered air-purifying respirator according to any one of claims 1 to 3, characterized in that, On the open - face mask, there is a window cover. Both ends of the window cover are respectively rotatably connected to both ends of the open - face mask.

6. The powered air purifying respirator according to claim 5, wherein, The outer periphery of the window cover is connected with a protective cloth body.

7. A powered air-purifying respirator according to any one of claims 1 to 3, characterized in that, The blower has a perforation for a belt to pass through.

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