Portable air filtration device

Abstract

The present application relates to a portable air filtering device, comprising: a canister having an air inlet and an air outlet, the air outlet being configured to communicate with a breathing mask, the canister being configured to be carried on a body of a human, the canister comprising a detachably connected lower canister portion and an upper canister portion; an activated carbon cartridge device mounted in the canister and positioned between the air inlet and the air outlet, the activated carbon cartridge device comprising a detachably connected activated carbon cartridge and a cartridge cover, the activated carbon cartridge defining an activated carbon receiving cavity, the activated carbon cartridge and the cartridge cover being separable to open the activated carbon receiving cavity when the lower canister portion and the upper canister portion are separated.

Description

Technical Field

[0001] This application relates to the field of air filtration technology, and more particularly to portable air filtration devices. Background Technology

[0002] When the air quality in an environment is poor, people typically use air filtration devices such as half-face respirators and half-face or full-face gas masks. These air filtration devices usually include activated carbon cartridges, so they have a certain filtration effect, but they also have the following drawbacks:

[0003] 1. Activated carbon boxes are mostly disposable items. Once they expire, they can only be discarded, resulting in waste.

[0004] 2. The activated carbon in the activated carbon box is installed in a fixed quantity, and its breathing resistance cannot be changed, so the wearer can only passively adapt to it.

[0005] 3. The activated carbon box, when installed on the breathing mask, significantly obstructs the wearer's vision, and its weight puts a strain on the wearer's head. Utility Model Content

[0006] The purpose of this application is to propose a portable air filtration device that does not have the three disadvantages mentioned above.

[0007] To achieve the above objectives, the portable air filtration device provided in this application includes:

[0008] A canister having an air inlet and an air outlet, the air outlet being configured to communicate with a breathing mask, the canister being configured to be carried on a user's body, the canister including a detachably connected lower part and upper part.

[0009] An activated carbon box device is installed inside the canister and positioned between the air inlet and the air outlet. The activated carbon box device includes a detachably connected activated carbon box and a box cover. The activated carbon box defines an activated carbon receiving cavity. When the lower part and the upper part of the canister are separated, the activated carbon box and the box cover can be separated, allowing the activated carbon receiving cavity to open.

[0010] Compared with existing technologies, the portable air filtration device of this application has the following advantages: Because the upper and lower parts of the canister are detachably connected, they can be separated when needed, allowing operation of the activated carbon box device. For example, the carbon box cover can be separated from the activated carbon box to replace the activated carbon and adjust its thickness. The former allows for long-term use of the air filtration device, avoiding disposal due to expired activated carbon; the latter allows for free adjustment of breathing resistance within a certain range. Furthermore, the canister is designed to be carried on the user's body, rather than worn on the head along with a breathing mask, thus not obstructing the wearer's vision or causing any burden on the wearer's head. Attached Figure Description

[0011] Figure 1 This is a diagram illustrating a portable air filtration device worn on the human body.

[0012] Figure 2 Cross-sectional view of the middle tank.

[0013] Figure 3 The left side is a top view of the upper part of the tank, and the right side is... Figure 1 Half-section view at FF in the middle.

[0014] Figure 4 for Figure 2 Enlarged view of section I in the middle.

[0015] Figure 5 for Figure 4 Sectional view at point KK.

[0016] Figure 6 This is a schematic diagram of the breathing mask near the inhalation port.

[0017] Figure 7 This is a schematic diagram of the inhalation junction.

[0018] Figure 8 This is a schematic diagram of the mounting end face of the suction connector.

[0019] Figure label:

[0020] 1. Tank body; 1a. Upper part of the tank body; 1b. Inside of the tank body; 1c. Lower part of the tank body; 2. Smell box device; 3. Screw; 4. Activated carbon box; 5. Filter cloth; 6. Carbon box cover; 7. Gas distributor; 8. Helical spring; 9. Negative ion generator device; 10. Breathing mask; 10a. Air outlet; 10b. Air inlet; 10c. Cone; 11. Inhalation assembly; 12. Exhaust port; 13. Air guide hose; 14. Backpack; M. Sealing gasket; 15. First reinforcing rib; 16. Second reinforcing rib; 17. First stiffening plate; 18. Second stiffening plate; 19. Buckle hook; 20. Slot. Detailed Implementation

[0021] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. The specific embodiments described herein are merely illustrative of the present application and are not intended to limit the scope of the application. It should also be noted that, for ease of description, only the parts relevant to the present application are shown in the accompanying drawings, not the entire structure.

[0022] Figure 1 A schematic diagram of a portable air filtration device worn on a human body is shown. The portable air filtration device includes a canister 1, an air delivery hose 13, an inhalation connector 11, and a breathing mask 10. The canister 1 can be placed in a backpack 14 so that it can be carried on the user's body. The breathing mask 10 is worn on the face of the human body. The canister 1 and the breathing mask 10 are connected by the air delivery hose 13 and the inhalation connector 11.

[0023] The canister 1 is used to treat air. The treatment methods may include activated carbon filtration, combining with negative ions to form negative oxygen ions, and combining with fragrances. The treated air enters the breathing mask 10 through the air delivery hose 13 and the inhalation connector 11.

[0024] Figure 2 A cross-sectional view of the tank is shown. Figure 3 A top view of the tank is shown, in which, Figure 3 The left side is a top view of the upper part of the tank, and the right side is... Figure 2 Half-section view at FF. (See image) Figure 3 As shown, the cross-section of the can 1 is cashew-shaped, with concave, rounded sides. Figure 3 (The position corresponding to the upper side line) When the can 1 is carried, the arc side contacts the human body, so that the can 1 and the human body form a large contact area, so that the can 1 fits the body and can prevent the can 1 from rolling to a certain extent, thereby improving the carrying comfort of the human body.

[0025] like Figure 2 As shown, the tank body 1 includes an upper part 1a and a lower part 1c. An air inlet 10b is provided at the bottom of the lower part 1c, and an air outlet 10a is provided at the top of the upper part 1a. A flexible air guide hose 13 is installed on the air outlet 10a (see...). Figure 1 ).

[0026] When a person inhales, the air inside the canister 1 can leave the canister 1 through the outlet 10a, and the air outside the canister 1 can enter the canister 1b through the inlet 10b. Since the breathing mask 10 usually has a one-way valve or a similar one-way valve structure, when a person exhales, the exhaled air will not enter the canister 1 through the air delivery hose 13.

[0027] like Figure 2As shown, the upper part 1a and the lower part 1c of the tank are detachably connected, for example, by means of a snap-fit ​​structure, so that the upper part 1a and the lower part 1c of the tank can be assembled together or separated from each other.

[0028] Figure 4 It shows Figure 2 Enlarged view of section I in the middle. Figure 5 It shows Figure 4 A cross-sectional view at point KK. (See image.) Figure 4 and Figure 5 As shown, as an example of a snap-fit ​​structure, the upper part 1a of the tank has snap-fit ​​claws 19 on both sides, and the lower part 1c of the tank has snap-fit ​​grooves 20 on both sides, and the snap-fit ​​claws 19 can be detachably installed in the snap-fit ​​grooves 20.

[0029] In addition, such as Figure 5 As shown, the width of the snap hook 19 at the snap-in point and the width of the slot 20 are interference fit, which is beneficial to the locking of the snap hook structure. An interference elastic compensation groove is made in the middle of the width of the snap hook 19, which makes the snap hook less labor-intensive when snapping in / opening the plate.

[0030] Back Figure 2 The upper part 1a, the lower part 1c, and the components located inside the tank 1b (described later) are all thin-walled parts. The upper part 1a and the lower part 1c each form a hollow structure. When the upper part 1a and the lower part 1c are assembled together, a hollow cavity (sometimes referred to as the tank interior 1b) is formed inside the tank 1.

[0031] like Figure 2 As shown, internal components can be installed inside the tank 1b. The internal components are securely held inside the tank 1b and will not move relative to the tank 1 due to the movement of the tank 1.

[0032] like Figure 2 As shown, the internal components of the canister, from top to bottom, include an odorant box device 2, an activated carbon box device, and a negative ion generator device 9. Specifically, the odorant box device 2 and the activated carbon box device are both located in the inner cavity of the upper part 1a of the canister. The negative ion generator device 9 is located in the inner cavity of the lower part 1c of the canister.

[0033] It should be noted that the odor box device 2 and the negative ion generator device 9 can be selected as needed. For example, in some embodiments, the tank body 1 may not have the odor box device 2 and / or the negative ion generator device 9.

[0034] like Figure 2As shown, the inner wall of the upper part 1a of the tank has multiple first reinforcing ribs 15. The first reinforcing ribs 15 increase the structural strength of the upper part 1a of the tank on the one hand, and are used for axial positioning of the activated carbon box device on the other hand. Specifically, the upper edge of the activated carbon box device abuts against the lower end d1 of the first reinforcing rib 15.

[0035] like Figure 2 As shown, an elastic element (e.g., a coil spring 8) is provided between the activated carbon box device and the lower part 1c of the can. When the upper part 1a and the lower part 1c of the can are assembled together, the elastic element is in an axially compressed state. The elastic element then applies a downward force to the lower part 1c of the can and an upward force to the activated carbon box device. This upward force causes the activated carbon box device to abut against the lower end d1 of the first reinforcing rib 15, thereby achieving axial fixation of the activated carbon box device. In addition, this upward force is transmitted to the upper part 1a of the can through the first reinforcing rib 15. Thus, the upper part 1a of the can is subjected to an upward force, and the lower part 1c of the can is subjected to a downward force, which causes the latches 19 and the slots 20 on both sides of the upper part 1a and the lower part 1c of the can to be tensioned, ensuring that the upper part 1a and the can 1b are firmly connected.

[0036] like Figure 2 As shown, the activated carbon box device includes a detachably connected activated carbon box 4 and a box cover 6. The activated carbon box 4 is located above the box cover 6, meaning the activated carbon box device is inverted inside the container 1. The activated carbon box 4 defines the outline of the activated carbon receiving cavity, in which activated carbon, such as granular activated carbon, can be placed. This activated carbon can be considered to form an activated carbon layer in the activated carbon receiving cavity, and the thickness of the activated carbon layer can be 1 to 3 cm.

[0037] Depending on the user's desired breathing resistance, different amounts of activated charcoal can be used to adjust the thickness of the activated charcoal layer. Specifically, a thinner activated charcoal layer results in lower inhalation resistance.

[0038] In other words, the air intake resistance of the activated carbon layer in this application is adjustable.

[0039] Activated carbon can be placed into the activated carbon box 4 using a measuring cup. For example, activated carbon corresponding to the volume of the measuring cup can form an activated carbon layer with a thickness of 1 cm in the activated carbon box 4.

[0040] In this application, the shape of the charcoal box cover 6 is smaller than the shape of the bottom opening of the activated carbon box 4, so that the charcoal box cover 6 can enter the activated carbon box 4 from bottom to top. Therefore, depending on the thickness of the activated carbon layer inside the activated carbon box 4, the charcoal box cover 6 can always keep the activated carbon tightly pressed inside the activated carbon box 4.

[0041] When the activated carbon container cavity is filled with activated carbon, the carbon box cover 6 abuts against the bottom of the activated carbon from bottom to top under the action of the elastic element, so that the activated carbon and the activated carbon box 4 are subjected to an upward force, and the upper edge of the activated carbon box 4 abuts against the lower end d1 of the first reinforcing rib 15, thereby achieving axial positioning of the activated carbon box 4.

[0042] like Figure 2 As shown, two layers of filter cloth 5 can be set inside the activated carbon box, with activated carbon sandwiched between the two layers of filter cloth 5. Specifically, the first filter cloth is located between the activated carbon and the activated carbon box 4, and the second filter cloth is located between the activated carbon and the carbon box cover 6.

[0043] like Figure 2 As shown, the ventilation end faces of the activated carbon box 4 and the carbon box cover 6 are configured as a horizontally and vertically interwoven grid solid divided into numerous ventilation square holes; the formed grid ventilation windows can also serve as support for the filter cloth 5.

[0044] like Figure 2 As shown, the activated carbon box device may also include a gas distribution plate 7, which is located at the bottom of the activated carbon box cover 6. The upper end of the elastic element abuts against the gas distribution plate 7. Similar to the activated carbon box cover 6, the gas distribution plate 7 can also enter the interior of the activated carbon box 4, thereby transmitting the force of the elastic element to the activated carbon box cover 6.

[0045] The air distributor 7 is provided with multiple air vents. The air distributor includes a first region near the center and a second region near the edge. The total area of ​​the multiple air vents in the first region is smaller than the total area of ​​the multiple air vents in the second region, so that the air volume in the first region per unit time is less than the air volume in the second region.

[0046] Therefore, when the user inhales, the air below the air distributor 7 can be guided to flow towards the second area of ​​the air distributor 7, preventing the air from concentrating and entering the activated carbon box 4 from the first area, which would prevent the activated carbon in other areas from being effectively utilized.

[0047] like Figure 2 As shown, the activated carbon box 4 is also equipped with a downwardly extending positioning post, the cross-section of which can be X-shaped (see...). Figure 2 (Cross-sectional view at JJ), of course, it can also be other shapes. The two layers of filter cloth 5, the carbon box cover 6 and the gas distributor 7 mentioned above are respectively provided with through holes corresponding to the positioning post. Therefore, the two layers of filter cloth 5, the carbon box cover 6 and the gas distributor 7 are positioned inside the activated carbon box 4 by the positioning post and cannot move laterally.

[0048] like Figure 2 As shown, the length of the positioning column can exceed the height of the activated carbon box 4, that is, the lower end of the positioning column is located below the lower end of the activated carbon box 4, the axis of the positioning column can correspond to the axis of the helical spring, and the upper end of the helical spring 8 is sleeved on the outer circumference of the positioning column.

[0049] like Figure 2 As shown, the odor box device 2 is fixedly installed on the top of the activated carbon box device, that is, the odor box device 2 is positioned on the side of the activated carbon box device near the air outlet 10a.

[0050] Specifically, the smelling box and the activated carbon box 4 in the smelling box device 2 can be fixed together by fasteners (e.g., screws 3), wherein the position of the fastener corresponds to the axis of the positioning column.

[0051] The olfactory container 2 can hold different olfactory materials as needed, such as herbal medicine or plant essential oil packaging. The olfactory materials utilize the principles of traditional olfactory medicine to mix volatile herbs or plant essential oils into the air, allowing the fragrant air to be inhaled and achieving a refreshing and healthy effect.

[0052] It should be noted that this application does not involve improvements to odorants, and odorants can be any commercially available odorant known in the prior art.

[0053] There are many types of references related to the application of aromatic scents, such as:

[0054] 1. A 360 website search for "Traditional Chinese Medicine Aromatherapy" will yield a large amount of related content;

[0055] 2. "Theoretical Research on Aromatic Orifice-Opening Therapy" - by Liu Longbiao, Yunnan University of Traditional Chinese Medicine;

[0056] 3. The Art of Aromatherapy – by Robert De Salander.

[0057] like Figure 2 As shown, the negative ion generator device 9 is fixedly installed in the lower part 1c of the tank, that is, the negative ion generator device is positioned on the side of the activated carbon box device near the air inlet 10b.

[0058] The negative ion generator device 9 can be a fullerene small-particle negative ion generator device. The negative ion generator device 9 includes a negative ion emission module, a lithium battery, and a charge / discharge protection circuit board. When the negative ion emission module is working, it releases a large number of small-particle negative ions, which are captured by oxygen molecules in the air, producing negative oxygen ions, known as "air vitamins." A space A is left in the inner cavity of the lower part 1c of the canister to allow the small-particle negative ions generated by the negative ion emission module to integrate into the air in the space. Sufficient small-particle negative oxygen ions capture, kill, and aggregate bacteria, viruses, PM2.5, and even smaller dust particles in the air flowing into the canister 1, causing them to agglomerate into larger particles so that they can be intercepted and adsorbed by the activated carbon layer inside the canister 1, preventing them from being inhaled by the human body.

[0059] To prevent ionization between negative ions and metal at close range, the surface of the helical spring 8 can be coated with an insulating layer.

[0060] While generating a large number of negative ions during operation, the negative ion generator 9 produces only trace amounts of ozone. These trace amounts of ozone are eventually consumed after being mixed with the air drawn into the canister, filtered by the filter cloth and activated carbon, mixed with the odorant, and delivered by the air delivery hose 13. In addition, the trace amounts of ozone can also kill bacteria in the air and be converted into oxygen during the decay process.

[0061] The lower part 1c of the tank is provided with mounting holes for the negative ion generator device 9, a power switch hole, an indicator light window hole, and a USB charging port. The negative ion generator device 9 can be fixed to the lower part 1c of the tank with screws and pressure plates. The power switch of the negative ion generator device 9 corresponds to the power switch hole, the indicator light corresponds to the indicator light window hole, and the USB charging port corresponds to the USB charging port.

[0062] It should be noted that this application does not relate to improvements to the negative ion generator device 9. The negative ion generator device 9 can be any commercially available negative ion generator device that conforms to relevant standards and is known in the prior art. References related to the application of negative ion generator devices include:

[0063] 1. "Environment, Health and Negative Oxygen Ions" - co-authored by Lin Jinming et al. of Tsinghua University, published by Chemical Industry Press, 2006 edition;

[0064] 2. "Vitamins in the Air: The Miraculous Healing Effects of Negative Ions" - by Noboru Horiguchi, published by Shanghai University of Traditional Chinese Medicine Press, June 2009.

[0065] like Figure 2 As shown, the bottom of the charcoal box cover 6 is provided with multiple first ribs 17 radiating from the center. The first ribs 17 not only strengthen the strength of the charcoal box cover 6, but also form a space B between the charcoal box cover 6 and the air distribution plate 7, so that air can flow into the activated carbon box 4.

[0066] like Figure 2 As shown, the top of the activated carbon box 4 is provided with multiple second ribs 18 radiating from the center. The second ribs 18 not only strengthen the activated carbon box 4, but also create a space D between the activated carbon box 4 and the odorant box device 2, so that air can flow out from the activated carbon box 4.

[0067] like Figure 2 As shown, the interior of tank 1 forms five spaces: A, B, C, D, and E.

[0068] Space A: Located between the air distribution plate 7 and the lower part 1c of the tank, it is used for negative ions generated by the negative ion generator 9 to be integrated into the air flowing through this space and captured and combined by oxygen molecules to become negative oxygen ions.

[0069] Space B: Located between the air distribution plate 7 and the charcoal box cover 6, the airflow is evenly distributed to the ventilation cross section of the charcoal box cover 6 through the distribution function of the air distribution plate 7.

[0070] Space C: A breathable space enclosed by the carbon box cover 6 and the activated carbon box 4, where air is filtered using filter cloth 5 and activated carbon.

[0071] Space D: The space from the top of the activated carbon box 4 to the dome of the upper part of the canister 1a. The airflow filtered by the activated carbon layer is mixed with odorous fragrance in this space and reaches the air outlet 10a at the upper part of the canister.

[0072] Space E: The space formed by the cage-shaped olfactory box, with ventilation slots on the bottom, lid and perimeter of the box to allow the odor of the built-in olfactory fragrance to be released.

[0073] The gas flow process inside tank 1 is as follows:

[0074] 1. Outside air enters the tank interior 1b through air inlet 10b;

[0075] 2. In space A, oxygen in the air combines with negative ions to form negative oxygen ions;

[0076] 3. In space B, the air is dispersed by the air distributor 7, so that the air passes through the carbon box cover 6 in a basically uniform manner.

[0077] 4. In space C, the air is filtered by filter cloth 5 and activated carbon;

[0078] 5. In space D, the air mixes with the odor emitted from the odor box space E;

[0079] 6. Exit the tank 1 through the air outlet 10a.

[0080] The assembly process of tank 1 is as follows:

[0081] 1. Invert the upper part 1a of the can and embed it into the fixing base (e.g., a foam packaging box);

[0082] 2. After the bottom of the odorant box is secured to the top of the activated carbon box 4 with screws 3 (e.g., stainless steel flathead screws), the odorant is filled into the odorant box and the lid of the odorant box is fastened.

[0083] 3. Hold the positioning post inside the activated carbon box 4 and put the activated carbon box 4 together with the odorant box into the inner cavity of the upper part 1a of the can, and position the activated carbon box 4 through the lower end d1 of the first reinforcing rib 15 inside the upper part 1a of the can.

[0084] 4. Using the positioning column as a guide column, install the first filter cloth and flatten it inside the activated carbon box 4; use a measuring cup (approximately 70cm in capacity) 3Fill the activated carbon box 4 with 1 to 3 cups of activated carbon to form an activated carbon layer 1 to 3 cm thick; smooth the surface of the activated carbon layer, and then install and lay the second filter cloth flat.

[0085] 5. Using the positioning column as a guide column, install the carbon box cover 6 (with the flat side facing the activated carbon layer) and the gas separator 7 in sequence;

[0086] 6. Fit the lower end of the helical spring 8 onto the outer circle of the hollow boss in the lower part 1c of the tank body, and position it using the ends d2 of the multiple second reinforcing ribs 16 around the hollow boss; then invert the lower part 1c of the tank body onto the upper part 1a of the tank body, so that the upper end of the helical spring 8 fits onto the lower end of the positioning post and presses against the gas distribution plate 7, applying pressure to the lower part 1c of the tank body to compress the helical spring 8, and insert the outer contour of the lower part 1c of the tank body into the outer contour of the upper part 1a of the tank body, until the lower part 1c of the tank body... When the mounting end face is fastened to the inner end face d3 of the upper part 1a of the tank, the buckle hooks 19 on both sides of the upper part 1a of the tank are engaged into the slots 20 on both sides of the lower part 1c of the tank; when the pressure is released, the rebound force of the coil spring 8 causes the lower part 1c of the tank to be pulled apart from the upper part 1a of the tank by about 1.5 mm. The buckle hooks 19 of the upper part 1a of the tank hook onto the slots 20 of the lower part 1c of the tank. At the same time, the interference of the width between the buckle hooks 19 and the slots 20 prevents them from easily coming out, thus completing the buckle locking.

[0087] The disassembly process of tank 1 is as follows:

[0088] 1. Invert tank 1;

[0089] 2. Apply pressure to the lower part 1c of the tank. When the lower part 1c of the tank is fastened to the inner end face d3 of the upper part 1a of the tank, pull the buckle hooks on both sides of the upper part 1a of the tank outward to release the pressure applied to the lower part 1c of the tank. The rebound force of the helical spring 8 causes the lower part 1c of the tank to detach from the upper part 1a of the tank.

[0090] 3. Grasp the positioning post of the activated carbon box 4, and remove the activated carbon box device and the odorant box device 2 together in the inner cavity of the upper part 1a of the tank. Then remove the gas distribution plate 7 and the carbon box cover 6 in sequence. Then you can take out the filter cloth 5, activated carbon and odorant and other consumables, and replace them with new consumables.

[0091] The breathing mask 10 can be obtained by appropriately simplifying a breathing mask with dual filter cartridges that is known in the prior art, either a half-mask or a full-mask.

[0092] Specifically, the exhaust port 12 on the front of the original respirator is retained, as are the inhalation port and three-tooth screw-on mounting structure on one side of the respirator 10, and the related one-way valve diaphragms for the inhalation and exhaust ports. The filter cotton and filter cartridges on both sides of the original respirator are removed, and the other inhalation port of the respirator 10 is sealed. The retained inhalation port is used to install the inhalation coupling 11, and a first three-tooth screw-on mounting structure is provided on the inhalation port (see...). Figure 6 The intake assembly 11 is provided with a second three-tooth screw-on mounting structure (see...). Figure 7 and Figure 8 ).

[0093] The connection structure between the inhalation assembly 11 and the breathing mask 10 adopts a three-tooth screw connection structure (also known as a "snap-on structure") widely used in the connectors of current air filtration equipment. It is as simple and quick as the installation operation of traditional breathing masks and filter cartridges: during installation, "one plug and one twist"; during disassembly, "one twist and one pull".

[0094] When installing the inhalation coupling 11 with the breathing mask 10, attach the end of the breathing mask 10 with the three square teeth (see...). Figure 6 Insert into one end of the suction connector 11 with three square notches (see...) Figure 8 The installation is completed by rotating it approximately 45 degrees clockwise.

[0095] exist Figure 6 and Figure 8 In the process of rotating the three beveled surfaces of the inner end face of the inspiratory connector 11 with the three square teeth of the breathing mask 10 in a clockwise direction, the inner end face of the square teeth presses against the beveled surfaces of the inner end face of the inspiratory connector 11, causing the mounting end face of the inspiratory connector 11 to approach the sealing gasket M of the mounting end face of the breathing mask 10, and finally presses the sealing gasket M tightly, achieving an airtight seal at the mounting end face. At the same time, the three blocking platforms on the inner end face of the inspiratory connector 11 limit the rotation of the square teeth of the breathing mask 10.

[0096] When disassembling the breathing mask 10 from the inhalation assembly 11, rotate it counterclockwise by about 45 degrees and pull it out.

[0097] Depend on Figure 7 As can be seen, the inhalation assembly 11 is composed of an inhalation connector and an inhalation elbow glued together. It can be assembled and glued according to different orientation marks left on the inhalation connector and the inhalation elbow to meet the wearer's different requirements for the orientation of the air guide hose 13 fitted on the inhalation assembly 11. For example, the air guide hose 13 may be required to extend downwards, backwards, or towards the neck and shoulders. Figure 1 The air hose 13 shown extends towards the neck and shoulders.

[0098] The two ends of the air guide hose 13 are respectively fitted onto the outer circle of the conical tube of the air outlet 10a and the outer circle of the conical tube of the air intake connector 11. The outer circle of the conical tube is provided with anti-retraction grooves similar to pagoda-shaped connectors to prevent the air guide hose 13 from easily coming off.

[0099] The cone 10c of the air outlet 10a is connected to the cone of the inhalation connector 11 via a flexible air delivery hose 13. The flexible air delivery hose 13 is model WH00152, has an inner diameter of 20 mm, and a length of 50 to 60 cm. The inner wall of the flexible air delivery hose 13 is smooth, resulting in low air resistance. The flexible air delivery hose 13 is lightweight and portable, and is made of non-toxic and odorless medical-grade polymer material.

[0100] After removing the air delivery hose 13, an outlet plug (e.g., a #17 bottle stopper) and an inlet plug (e.g., a #22 pull ring inner plug) should be installed on the tank 1 in a timely manner to prevent dust and moisture.

[0101] exist Figure 1 In the middle, the original exhaust port 12 is retained at the lower front of the breathing mask 10. A filter cloth can be added inside the window of the exhaust port 12 to prevent droplets from being sprayed out.

[0102] A water-containing sponge strip can be placed in the groove of the silicone face mask 10 to solve the problem of excessively dry inhaled air.

[0103] The plastic parts, air intake connectors, and air intake elbows of the tank body 1 are all made of food-grade polypropylene through molding. The empty weight of the tank body 1 is more than 100 grams, and the full weight is more than 200 grams. The breathing mask 10 has removed the filter boxes on both sides and replaced them with an air intake connector 11 and an air guide hose 13 weighing less than 100 grams, which greatly reduces the weight of the system.

[0104] As the load on the breathing mask 10 is reduced, the elastic straps of the breathing mask 10 can be simplified as appropriate.

[0105] The breathing mask 10 of this application reduces the weight load on the head, making it simple and beautiful. Furthermore, due to the small size of the inhalation assembly structure, it eliminates the obstruction of the user's vision caused by the original filter box installation.

[0106] The airflow path during inhalation is as follows:

[0107] Inhaled gas → Small-particle negative oxygen ions are generated → Filter cloth 5 and activated carbon layer → Odors are mixed in → Air delivery hose → Breathing mask → Human breathing.

[0108] The negative pressure along the entire airflow path is provided by the wearer's inhalation force. The thickness of the activated carbon layer can vary from 1 to 3 centimeters, making the inhalation resistance adjustable. Specifically, the thinner the activated carbon layer, the lower the inhalation resistance.

[0109] Therefore, it can be seen that this application can achieve multiple effects such as disinfection, sterilization, purification and filtration, and health care.

[0110] The portable air filtration device of this application may be suitable for outdoor duty personnel, environmental sanitation workers, and the middle-aged and elderly population.

[0111] The method for determining whether to use, maintain, and replace the filter media in the portable air filtration device of this application can refer to the existing air filtration devices of the same type.

[0112] Use and maintenance mainly refer to cleaning the portable air filtration device during daily use, especially after each day's use, and also include checking the airtightness of the gas delivery channel to the human body.

[0113] The method for determining whether to replace filter media mainly refers to the method for determining the failure of filter media (including filter cloth 5 and activated carbon). Similar air filtration equipment is usually replaced after a certain number of days of use, or when the human body detects an odor when inhaling the air.

[0114] The portable air filtration device of this application has a variable amount of activated carbon, which is different from the quantitative loading of similar air filtration devices. The thickness of the activated carbon and the presence of an odor during use can be used as a method to determine whether to replace the filter material.

[0115] For odor-causing media, the replacement cycle can generally be longer than that of filter media.

[0116] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can easily understand that they can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A portable air filtration device, characterized in that, include: The canister (1) has an air inlet (10b) and an air outlet (10a), the air outlet (10a) being configured to communicate with a breathing mask (10), the canister (1) being configured to be carried on the user's body, and the canister (1) including a detachably connected lower part (1c) and upper part (1a); An activated carbon box device is installed inside the tank (1) and positioned between the air inlet (10b) and the air outlet (10a). The activated carbon box device includes a detachably connected activated carbon box (4) and a carbon box cover (6). The activated carbon box (4) defines an activated carbon receiving cavity. When the lower part (1c) and the upper part (1a) of the tank are separated, the activated carbon box (4) and the carbon box cover (6) can be separated, thereby opening the activated carbon receiving cavity.

2. The portable air filtration device according to claim 1, characterized in that, The portable air filtration device also includes: Scent box device (2), which is mounted on the activated carbon box device and positioned on the side of the activated carbon box device near the air outlet (10a), the scent box device (2) defines a scent receiving cavity.

3. The portable air filtration device according to claim 1, characterized in that, The portable air filtration device also includes: A negative ion generator device (9) is installed inside the tank (1) and positioned on the side of the activated carbon box device near the air inlet (10b).

4. The portable air filtration device according to claim 1, characterized in that, The portable air filtration device also includes: A breathing mask (10) has an inhalation port, and a first three-tooth screw-on mounting structure is provided on the outer periphery of the inhalation port; A gas guide hose (13) is provided. The lower end of the gas guide hose (13) is installed on the tank (1) and is connected to the air outlet (10a). The upper end of the gas guide hose (13) is provided with an air intake connector (11). The air intake connector (11) has a second three-tooth screw-fit installation structure. The second three-tooth screw-fit structure is engaged and twisted with the first three-tooth screw-fit structure to make the upper end of the gas guide hose (13) connected to the air intake.

5. The portable air filtration device according to any one of claims 1 to 4, characterized in that, The activated carbon box device is inverted inside the canister (1), so that the activated carbon box (4) is located above the carbon box cover (6); The upper edge of the activated carbon box (4) abuts against the end of the first reinforcing rib (15) of the upper part (1a) of the can body; The charcoal box cover (6) is movably disposed in the activated carbon containing cavity. An elastic element is disposed between the charcoal box cover (6) and the lower part (1c) of the can body. When the activated carbon containing cavity contains activated carbon, the charcoal box cover (6) applies an upward force to the activated carbon box (4) by means of the activated carbon under the action of the elastic element, so that the activated carbon box (4) is positioned at the end of the first reinforcing rib (15).

6. The portable air filtration device according to claim 5, characterized in that, The activated carbon box (4) has a downwardly extending positioning post, and the carbon box cover (6) has a through hole corresponding to the positioning post.

7. The portable air filtration device according to claim 6, characterized in that, The activated carbon box device also includes: The first filter cloth is located in the activated carbon receiving cavity and positioned between the activated carbon and the activated carbon box (4). The first filter cloth has through holes corresponding to the positioning post. The second filter cloth is located inside the activated carbon receiving cavity and positioned between the activated carbon and the carbon box cover (6). The second filter cloth has through holes corresponding to the positioning post.

8. The portable air filtration device according to claim 6, characterized in that, The air inlet (10b) is located at the lower part (1c) of the tank body, and the air outlet (10a) is located at the upper part (1a) of the tank body. The portable air filtration device further includes: A gas separator (7) is positioned between the air inlet (10b) and the carbon box cover (6). The upper end of the elastic element abuts against the gas separator (7). The gas separator (7) is movably disposed in the activated carbon receiving cavity. The gas separator (7) has a through hole corresponding to the positioning post. The gas separator (7) is provided with a plurality of ventilation holes. The gas separator (7) includes a first region near the center and a second region near the edge. The total area of ​​the plurality of ventilation holes in the first region is smaller than the total area of ​​the plurality of ventilation holes in the second region, so that the ventilation volume in the first region per unit time is smaller than the ventilation volume in the second region.

9. The portable air filtration device according to claim 5, characterized in that, The inner wall of the lower part (1c) of the tank has an upwardly protruding hollow boss. The air inlet (10b) is located inside the hollow boss. A second reinforcing rib (16) is provided on the outer periphery of the hollow boss. The elastic element is a helical spring (8). The lower end of the helical spring (8) is sleeved on the outer periphery of the hollow boss and abuts against the end face of the second reinforcing rib (16).

10. The portable air filtration device according to claim 5, characterized in that, The upper part (1a) of the tank body is provided with snap hooks (19) on both sides, and the lower part (1c) of the tank body is provided with slots (20) on both sides. The snap hooks (19) are detachably connected to the slots (20). When the snap hooks (19) are connected to the slots (20), the elastic element applies an upward force to the snap hooks (19) and a downward force to the slots (20), so that the snap hooks (19) are locked in the slots (20).

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