A stand-alone add-on fragrance device for a hand-held tanked oxygen mask

Abstract

The application discloses an independent add-on type fragrance adding device for a handheld canned oxygen mask, and belongs to the technical field of handheld canned oxygen auxiliary equipment. The device comprises an independent add-on type fragrance adding assembly which is detachably installed in a diameter expansion section of the oxygen mask and located at a safe isolation position downstream of a gas outlet of an oxygen cylinder, so that a physical isolation is realized between an essential oil carrier and the high-pressure oxygen cylinder body, and a combustion and explosion risk is eliminated. The fragrance adding assembly comprises a cylindrical shell, an elastic support piece on the outer side of the cylindrical shell is in interference fit or clamped fixation with the inner wall of the diameter expansion section. An inlet filter screen, a high-density impregnated sponge and an outlet filter screen are sequentially arranged inside the cylindrical shell along the airflow direction, the sponge is impregnated with food-grade aromatic essential oil and is axially clamped and positioned by the two filter screens. Both the two filter screens are microporous rectifying filter screens, and together with the sponge, the two filter screens form a three-section coordinated air path of pre-rectifying, middle penetrating and carrying fragrance, and post-secondary rectifying and intercepting, so that the oxygen is rectified, penetrates the sponge to carry the fragrance, and is output after secondary rectification, the fragrance is uniform and soft, and the device is convenient to disassemble, replace and add fragrance.

Description

Technical Field

[0001] This invention relates to the field of auxiliary equipment technology for handheld canned oxygen, and more specifically to an independent flavoring device for handheld canned oxygen masks. Background Technology

[0002] Handheld oxygen canisters are widely used for daily hypoxia relief, high-altitude travel, office work alertness, exercise recovery, and emergency oxygen supply due to their portability, lightweight design, and instant usability. Currently, handheld oxygen canisters with accompanying masks typically employ a three-section stepped structure: the end closest to the oxygen canister is the connector section for plugging into the canister's outlet; the middle section is the expansion section, with a larger diameter than the connector section; and the end closest to the mouth and nose is the mask section, with the largest diameter, used to cover the mouth and nose. These three sections are interconnected to form the mask's oxygen channel, providing only oxygen delivery and simple filtration. The oxygen inhalation process produces no aromatic odor, resulting in a limited user experience.

[0003] To improve the oxygen therapy experience, existing exploratory solutions mainly fall into two categories, but both have significant drawbacks:

[0004] The first approach involves directly dripping or injecting food-grade aromatic essential oils into the oxygen canister, allowing the oils to mix directly with the high-pressure oxygen inside. However, food-grade essential oils are flammable organic media, while oxygen is a strong combustion-supporting medium. Prolonged coexistence of these two substances within a sealed, high-pressure canister can easily form a flammable and explosive mixture, posing a significant safety hazard of combustion and explosion. Furthermore, the essential oils may corrode the canister's seals and contaminate the oxygen outlet, making this approach impractical for handheld canister oxygen products.

[0005] The second type of solution involves adding a fragrance-enhancing structure to the air outlet or rear end of the gas delivery duct of the mask. However, these structures are mostly integrated with the mask body or gas delivery duct, becoming an inseparable part of the mask. The problems are twofold: firstly, a mask can only be fitted with one fragrance, requiring the entire mask to be replaced when the user needs to change the fragrance, resulting in poor versatility and high maintenance costs; secondly, integrated structures are difficult to disassemble and clean, and the sponge or essential oil carrier is prone to clogging and deterioration after long-term use, affecting ventilation and hygiene. More importantly, while existing technologies may vaguely mention downstream or outlet fragrance enhancement, they fail to recognize the relationship between the risk of combustion and explosion and the pressure threshold when high-pressure oxygen and flammable essential oils coexist. They also lack specific technical insights into precisely isolating the essential oil carrier to the safe pressure range downstream of the container and achieving uniform fragrance carrying through front and rear microporous rectifier filters and impregnated sponges.

[0006] Furthermore, the existing handheld oxygen canister masks have a relatively large orifice in the expanded section. This space, located downstream of the oxygen canister's outlet, has a significantly reduced airflow pressure, but it is not currently being effectively utilized. Adding a separate, detachable fragrance-enhancing assembly to this area would not only maintain the original gas supply principle but also achieve a safe, uniform, and replaceable fragrance-enhancing effect, thus possessing significant practical value.

[0007] Therefore, the industry currently lacks a handheld canned oxygen aroma enhancer that physically isolates the essential oil from the oxygen canister, eliminates the risk of combustion or explosion, is independently detachable and installable, allows for flexible fragrance switching, and ensures smooth ventilation and uniform aroma. Based on these issues, there is an urgent need to design an independent, add-on aroma enhancer that is compatible with existing handheld canned oxygen masks, requires no modification to existing equipment, and is installed within the mask's expansion section, along with a corresponding aroma enhancer method. Summary of the Invention

[0008] In view of this, the present invention provides an independent flavoring device for handheld canister oxygen masks, aiming to solve the above-mentioned technical problems.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: An independently mounted fragrance enhancement device for a handheld canister oxygen mask, used in conjunction with a handheld canister oxygen cylinder, wherein the oxygen mask has an internal oxygen channel, the oxygen channel comprising a plug section, an expansion section, and a mask section connected sequentially along the airflow direction, the plug section being used to plug into the outlet of the handheld canister oxygen cylinder, the expansion section having a larger diameter than the plug section, and the mask section being used to cover the mouth and nose, the three being internally interconnected; and also includes an independently mounted fragrance enhancement assembly; The fragrance-enhancing assembly is detachably installed within the enlarged section and is located in a safe and isolated position downstream of the outlet of the handheld oxygen cylinder, thereby physically isolating the essential oil carrier in the fragrance-enhancing assembly from the handheld oxygen cylinder. The aroma-enhancing assembly includes a cylindrical shell with an elastic support plate on its outer side. The elastic support plate is interference-fitted or snap-fitted to the inner wall of the expanded section. Inside the cylindrical shell, an inlet filter, a high-density impregnated sponge, and an outlet filter are sequentially arranged along the airflow direction. The high-density impregnated sponge is impregnated with food-grade aromatic essential oil and is axially clamped and positioned by the inlet and outlet filters. Both the inlet and outlet filters are microporous rectifier filters, which, together with the high-density impregnated sponge, form a three-stage synergistic airflow path consisting of pre-rectification filtration, mid-stage fragrance penetration, and post-secondary rectification filtration. Oxygen enters from the insertion section, is rectified by the inlet filter, penetrates the high-density impregnated sponge to carry the aroma, and is then rectified and intercepted by the outlet filter before being output from the mask section.

[0010] Through the above technical solution, this invention, by detachably installing the independently added fragrance assembly within the expanded section of the oxygen mask and in a safe, isolated position downstream of the outlet of the handheld oxygen cylinder, physically isolates the high-density impregnated sponge soaked in food-grade aromatic essential oils from the high-pressure oxygen cylinder. This fundamentally eliminates the safety hazard of essential oils entering the high-pressure oxygen cylinder and mixing with the combustion-supporting oxygen inside, potentially causing combustion and explosion. Simultaneously, by utilizing the interference fit or snap-fit ​​between the elastic support plate on the outer side of the cylindrical shell and the inner wall of the expanded section, it achieves the effect of quick disassembly and fragrance replacement without modifying the original mask and oxygen cylinder structure or using adhesives. Furthermore, through the cylindrical shell... The internal structure, consisting of an inlet filter, a high-density impregnated sponge, and an outlet filter arranged sequentially along the airflow direction, forms a three-stage coordinated airflow path: "pre-rectification filtration—middle penetration and fragrance carrying—post-secondary rectification filtration." This allows the oxygen flow to first pass through the inlet filter to remove impurities and be rectified into a uniform and stable airflow. Then, it vertically penetrates the high-density impregnated sponge to uniformly carry the fragrance. Finally, the outlet filter eliminates local eddies and traps essential oil droplets and sponge debris. Thus, while ensuring unobstructed airflow and not affecting the original oxygen supply flow, it achieves a safe, stable, and fragrance-enhancing effect with uniform and gentle fragrance output, no essential oil dripping pollution, and no sponge debris entering the mask section. It also allows for fragrance replacement and oxygen absorption enhancement.

[0011] Preferably, in the above-mentioned independent flavoring device for handheld canister oxygen masks, the elastic support plate is distributed circumferentially along the outer side of the cylindrical shell, and a limiting protrusion is provided on the outer side of the elastic support plate. The limiting protrusion and the inner wall of the expanded diameter section form an axial limiting and radial anti-rotation fit.

[0012] Preferably, in the above-mentioned independent flavoring device for handheld canister oxygen masks, both the inlet filter and the outlet filter include a rigid plastic frame and a microporous filter. The rigid plastic frame is detachably connected to the cylindrical shell by a snap fastener, so that the high-density impregnated sponge can be replaced after the filter is removed.

[0013] Preferably, in the above-mentioned independent flavoring device for handheld canned oxygen masks, the cylindrical shell has a hollow through-type receiving cavity inside, and the high-density impregnated sponge is adapted to fill the receiving cavity, with its two ends respectively abutting against the inlet filter and the outlet filter.

[0014] Preferably, in the above-mentioned independent fragrance-enhancing device for a handheld canned oxygen mask, the inlet filter is used to filter out fine impurities in the oxygen and to rectify the turbulent airflow from the handheld canned oxygen cylinder into a uniform and stable airflow, so that the airflow penetrates the high-density impregnated sponge vertically and evenly, avoiding uneven fragrance release caused by turbulence.

[0015] Preferably, in the above-mentioned independent fragrance-enhancing device for a handheld canister oxygen mask, the outlet filter is used to eliminate the local eddies generated after the airflow penetrates the high-density impregnated sponge, and to intercept the essential oil droplets carried out with the airflow, so that the fragrance concentration output through the mask section is uniform and stable, while preventing sponge debris from entering the mask section.

[0016] Preferably, in the above-mentioned independent fragrance-enhancing device for a handheld canister oxygen mask, the inlet filter, the high-density impregnated sponge, and the outlet filter are arranged coaxially along the airflow direction of the oxygen channel of the mask to form a through fragrance-enhancing air path, and this air path does not change the original direction and air supply principle of the oxygen channel of the mask.

[0017] Preferably, in the above-mentioned stand-alone flavoring device for handheld canister oxygen masks, the elastic support sheet is made of food-grade elastic plastic material.

[0018] Preferably, in the above-mentioned stand-alone fragrance-enhancing device for a handheld canister oxygen mask, the food-grade aromatic essential oil is any one or more of orange essential oil, osmanthus essential oil, lemon essential oil, and jasmine essential oil.

[0019] Preferably, in the above-mentioned stand-alone aroma-enhancing device for a handheld canister oxygen mask, the oxygen flow pressure at the safety isolation position is lower than the internal pressure of the high-pressure oxygen canister, so that the high-density impregnated sponge and the food-grade aromatic essential oils it adsorbs are completely isolated from the high-pressure oxygen canister.

[0020] As can be seen from the above technical solution, compared with the prior art, the present invention discloses an independently attachable aroma-enhancing device for handheld canister oxygen masks, which has the following beneficial effects: 1. Outstanding safety advantages: The flavoring carrier is located in the mask channel downstream of the oxygen tank and in a safe isolation position where the oxygen pressure does not exceed 0.1MPa. The food essential oil is physically isolated from the high-pressure oxygen tank throughout the process, preventing flammable essential oil from entering the oxygen tank cavity and completely eliminating the risk of combustion and explosion caused by the mixing of oxygen and essential oil in the tank.

[0021] 2. It adopts a three-stage synergistic airflow structure with front and rear microporous rectifier filters and high-density impregnated sponge, which is not a simple superposition: the front filter is responsible for rectification, so that the airflow penetrates the sponge at a uniform speed; the sponge is responsible for uniformly carrying fragrance; the rear filter is responsible for secondary rectification and interception. The three functions support each other and work together to solve the problems of "uneven fragrance, essential oil dripping, and obstructed airflow".

[0022] 3. The entire device is a detachable and add-on independent accessory, requiring no modification to the existing handheld canister oxygen and mask equipment, and is compatible with all standard models of handheld canister oxygen masks; the flavoring component can be removed separately, allowing for flexible flavor switching, and the base and filter are reusable, making it highly versatile and low in maintenance costs.

[0023] 4. The structure is reasonably designed and the air passage is well-connected. After installation, the oxygen output flow rate changes by ≤5%, which does not affect the normal oxygen supply effect. It is safe, stable and has no odor residue. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0025] Figure 1 The attached figure is a structural schematic diagram of the independently attachable aroma-enhancing device for a handheld canister oxygen mask provided by the present invention; Figure 2 The attached figure is an exploded view of the structure of the independent flavoring device for a handheld canister oxygen mask provided by the present invention. Figure 3 The attached figure is a half-sectional schematic diagram of the independent flavoring device for handheld canned oxygen masks provided by the present invention. Figure 4 The attached figure is a schematic diagram of the structure of the oxygen mask provided by the present invention; Figure 5 The attached figure is a schematic diagram of the external structure of the flavoring assembly provided by the present invention; Figure 6 The attached figure is an exploded view of the flavoring assembly provided by the present invention; Figure 7 The attached figure is a schematic diagram of the cylindrical shell provided by the present invention; Figure 8 The attached figure is a schematic diagram of the structure of the inlet filter screen provided by the present invention.

[0026] in: 1-Handheld oxygen cylinder; 2-Oxygen mask; 3-Fragrance enhancement assembly; 21-Plug-in section; 22-Expanded diameter section; 23-Mask section; 31-Cylindrical shell; 311-Receiving cavity; 312-Snap fastener; 32-Elastic support piece; 321-Limiting protrusion; 33-Inlet filter screen; 331-Rigid plastic frame; 332-Microporous filter screen; 34-High-density impregnated sponge; 35-Outlet filter screen. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] like Figures 1 to 4 As shown, the device provided in this embodiment of the invention is used for an oxygen mask 2 that is compatible with a handheld canister oxygen cylinder 1. The oxygen mask 2 has an internal oxygen channel, which includes a connector section 21, an expansion section 22, and a mask section 23 connected sequentially along the airflow direction. The connector section 21 is used to connect to the outlet of the handheld canister oxygen cylinder 1. The diameter of the expansion section 22 is larger than that of the connector section 21. The mask section 23 covers the mouth and nose, and the three sections are internally interconnected to form a straight, continuous airflow path. The airflow rate of this oxygen channel is ≥95%, and the oxygen flow rate changes by ≤5% after adding the fragrance assembly, without altering the original oxygen flow rate, ensuring smooth oxygen intake.

[0029] The invention also includes a separately installed fragrance-enhancing assembly 3. The fragrance-enhancing assembly 3 is detachably installed within the expanded diameter section 22 and located in a safe, isolated position downstream of the outlet of the handheld oxygen cylinder 1. At this safe, isolated position, the oxygen flow pressure does not exceed 0.1 MPa, physically isolating the essential oil carrier in the fragrance-enhancing assembly 3 from the high-pressure canister of the handheld oxygen cylinder 1. This prevents the essential oil from flowing back into the oxygen cylinder, fundamentally avoiding the risk of combustion and explosion caused by the mixing of essential oil and high-pressure oxygen inside the cylinder. As a downstream independent component, the entire fragrance-enhancing assembly 3 only flows through the essential oil-impregnated sponge after the oxygen flows out of the canister; the essential oil never enters the high-pressure oxygen cylinder.

[0030] like Figures 5 to 8 As shown, the flavoring assembly 3 includes a cylindrical shell 31. The cylindrical shell 31 is a through-type structure with openings at both ends, and has a hollow through-type receiving cavity 311 inside. An elastic support piece 32 is provided on the outer side of the cylindrical shell 31. The elastic support piece 32 is distributed circumferentially along the outer side of the cylindrical shell 31 and is made of food-grade elastic plastic material, such as food-grade silicone, TPE, or TPU. The elastic support piece 32 is interference-fitted or snap-fitted to the inner wall of the expanded diameter section 22, achieving a glue-free, detachable snap-fit ​​fixation. Limiting protrusions 321 are provided on the outer side of the elastic support piece 32. The limiting protrusions 321 are micro-elastic protrusions distributed circumferentially along the outer side of the elastic support piece 32, with a protrusion height of 0.5~2mm. The limiting protrusions 321 form an axial limiting and radial anti-rotation fit with the inner wall of the expanded diameter section 22, preventing the flavoring assembly 3 from falling off or shifting under the impact of oxygen flow, while allowing for repeated manual disassembly and assembly.

[0031] Inside the cylindrical shell 31, along the airflow direction, are sequentially arranged an inlet filter 33, a high-density impregnated sponge 34, and an outlet filter 35. The high-density impregnated sponge 34 fits snugly into the receiving cavity 311, with its two ends abutting against the inlet filter 33 and the outlet filter 35 respectively. No adhesive is required for fixation, preventing adhesives from contacting oxygen and essential oils. The high-density impregnated sponge 34 is impregnated with food-grade aromatic essential oils, serving as the core fragrance carrier. The food-grade aromatic essential oils can be any one or more of orange essential oil, osmanthus essential oil, lemon essential oil, and jasmine essential oil. The amount of essential oil impregnation is controllable, ensuring no odor residue or essential oil drips onto the mask during oxygen absorption.

[0032] Both the inlet filter 33 and the outlet filter 35 include a rigid plastic frame 331 and a microporous filter 332. The rigid plastic frame 331 is detachably connected to the cylindrical housing 31 via a snap-fit ​​312. Specifically, the snap-fit ​​312 is located inside the port of the cylindrical housing 31, and the outer edge of the rigid plastic frame 331 engages with the snap-fit ​​312 to facilitate the replacement of the high-density impregnated sponge 34 after the filter is removed. Both the inlet filter 33 and the outlet filter 35 are microporous rectifying filters, which, together with the high-density impregnated sponge 34, constitute a three-stage coordinated airflow path of "pre-rectification filtration—middle penetration and fragrance carrying—post-secondary rectification filtration".

[0033] It should be noted that the mesh size of the microporous filter 332 in the attached diagram is enlarged for ease of illustration. In the actual product, the filter has a microporous structure with a pore size of 20~50μm and a filtration efficiency of ≥90% for particles ≥10μm. The outlet filter 35 has a retention rate of ≥85% for essential oil droplets. The large pores in the attached diagram are only for illustrating the filter structure and do not represent the actual pore size.

[0034] Oxygen enters from the plug section 21, is rectified by the inlet filter 33, penetrates the high-density impregnated sponge 34 carrying aroma, and is then rectified and intercepted again by the outlet filter 35 before being output from the mask section 23.

[0035] Specifically, the inlet filter 33 filters out fine impurities in the oxygen and straightens the turbulent airflow from the handheld oxygen cylinder 1 into a uniform and stable airflow, allowing the airflow to penetrate the high-density impregnated sponge 34 vertically and evenly, avoiding uneven aroma release caused by turbulence. The outlet filter 35 eliminates local eddies generated after the airflow penetrates the high-density impregnated sponge 34 and intercepts essential oil droplets carried by the airflow, ensuring a uniform and stable aroma concentration output through the mask section 23, while preventing sponge debris from entering the mask section 23. Through the front and rear double-layer microporous straightening filters and the impregnated sponge forming a three-stage synergistic airflow structure of "pre-straightening filtration - middle penetration and aroma carrying - post-secondary straightening filtration", the aroma output concentration variation coefficient is ≤15%, achieving a gentle and uniform aroma during oxygen inhalation.

[0036] The inlet filter 33, the high-density impregnated sponge 34, and the outlet filter 35 are arranged coaxially along the airflow direction of the oxygen channel of the mask, forming a through-type aroma-enhancing air path, and this air path does not change the original direction and air supply principle of the oxygen channel of the mask.

[0037] In this embodiment, the density of the high-density impregnated sponge 34 is 0.03~0.08 g / cm³. 3 With a thickness of 5~15mm, it stably adsorbs food-grade aromatic essential oils, prevents dripping and leakage, and does not obstruct the airflow or block the oxygen channel of the mask. The pressure difference before and after the oxygen flow passes through the high-density impregnated sponge 34 is ≤50Pa.

[0038] Both the inlet filter 33 and the outlet filter 35 are microporous filters with a pore size of 20~50μm and a filtration efficiency of ≥90% for particles ≥10μm. The outlet filter 35 has a retention rate of ≥85% for essential oil droplets and can filter out fine impurities in oxygen. At the same time, it stabilizes the flow of oxygen to ensure that the airflow penetrates the high-density impregnated sponge 34 at a uniform speed.

[0039] The elastic support plate 32 is made of food-grade elastic plastic material and is interference-fitted with the inner wall of the expanded diameter section 22 to achieve glue-free detachable snap-fit ​​fixation. The high-density impregnated sponge 34 and filter screen can be repeatedly disassembled and replaced, and the support plate and filter screen can be reused.

[0040] The specific implementation steps of the flavor enhancement method in this embodiment are as follows: S1. Assembly Pre-treatment: A high-density impregnated sponge 34 soaked in a pre-selected flavored food-grade aromatic essential oil is fixedly installed inside the cylindrical shell 31 of the fragrance-enhancing assembly 3. The inlet filter 33 and outlet filter 35 are then installed in sequence, so that the sponge is axially clamped and positioned, and the whole assembly is assembled into an integrated fragrance-enhancing assembly 3. The fragrance-enhancing assembly 3 is fixed inside the expanded section 22 of the oxygen mask 2 by the elastic support piece 32, and the fragrance-enhancing assembly 3 is located in a safe isolation position downstream of the outlet of the handheld canister oxygen cylinder 1. The oxygen flow pressure at this safe isolation position is not higher than 0.1MPa. The entire fragrance-enhancing assembly 3 is arranged downstream of the oxygen tank, and the essential oil carrier is isolated from the high-pressure oxygen tank throughout the process, so that the essential oil does not enter the oxygen tank.

[0041] S2. Inlet air filtration and flow stabilization: The oxygen output from the handheld canister enters the oxygen channel of the mask and first passes through the inlet filter 33. The inlet filter 33 has a pore size of 20~50μm and a filtration efficiency of ≥90% for particles ≥10μm. This completes the filtration of impurities and straightens the turbulent airflow into a uniform and stable airflow, avoiding uneven aroma release caused by turbulence.

[0042] S3. Permeation and Fragrance Enhancement: After stabilization, a uniform flow of oxygen vertically penetrates the high-density impregnated sponge 34 inside the fragrance enhancement component. The high-density impregnated sponge 34 has a density of 0.03~0.08 g / cm³.3 The thickness is 5~15mm, and the pressure difference before and after the airflow passes through the sponge is ≤50Pa; the airflow is in full contact with the food-grade essential oil adsorbed by the sponge, and carries the aroma evenly, with the aroma output concentration variation coefficient ≤15%.

[0043] S4. Secondary filtration output: After secondary filtration and pressure stabilization through the outlet filter 35, the scented oxygen is stably output to the mask section 23 of the oxygen mask 2 for users to inhale oxygen, achieving simultaneous and uniform fragrance enhancement during oxygen inhalation; the outlet filter 35 has a retention rate of ≥85% for essential oil droplets, removing trace amounts of sponge debris and excess essential oil particles.

[0044] S5. Maintenance and Replacement: When the aroma fades or the aroma needs to be changed, disassemble the aroma enhancement assembly 3, remove one end of the filter screen, take out the high-density impregnated sponge 34 for replacement. The support plate and filter screen can be reused. The operation is simple and convenient.

[0045] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0046] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An independent flavoring device for a handheld canister oxygen mask, used in conjunction with a handheld canister oxygen cylinder (1) for an oxygen mask (2), wherein the oxygen mask (2) has an internal oxygen channel, the oxygen channel comprising a plug section (21), an expansion section (22), and a mask section (23) connected sequentially along the airflow direction, the plug section (21) being used to plug into the outlet of the handheld canister oxygen cylinder (1), the expansion section (22) having a larger diameter than the plug section (21), and the mask section (23) covering the mouth and nose, the three being internally interconnected; characterized in that, It also includes a separately installed fragrance enhancement assembly (3); The aroma enhancement assembly (3) is detachably installed in the expansion section (22) and located in a safe isolation position downstream of the outlet of the handheld oxygen cylinder (1), so that the essential oil carrier in the aroma enhancement assembly (3) is physically isolated from the handheld oxygen cylinder (1). The aroma-enhancing assembly (3) includes a cylindrical shell (31), with an elastic support plate (32) on the outside of the cylindrical shell (31). The elastic support plate (32) is press-fitted or snap-fitted to the inner wall of the expanded diameter section (22). Inside the cylindrical shell (31), along the airflow direction, are arranged an inlet filter (33), a high-density impregnated sponge (34), and an outlet filter (35). The high-density impregnated sponge (34) is impregnated with food-grade aromatic essential oil and is supported by the inlet filter (33) and the outlet filter. (35) Axial clamping and positioning; The inlet filter (33) and the outlet filter (35) are both microporous rectifier filters, and together with the high-density impregnated sponge (34), they form a three-stage coordinated air path of pre-rectification filtration, middle penetration and fragrance carrying, and post-secondary rectification filtration; Oxygen enters from the plug section (21), is rectified by the inlet filter (33), penetrates the high-density impregnated sponge (34) to carry fragrance, and is then rectified and intercepted by the outlet filter (35) before being output from the mask section (23).

2. The independently mounted aroma-enhancing device for a handheld canister oxygen mask according to claim 1, characterized in that, The elastic support plate (32) is distributed circumferentially along the outer side of the cylindrical shell (31), and a limiting protrusion (321) is provided on the outer side of the elastic support plate (32). The limiting protrusion (321) and the inner wall of the expanded diameter section (22) form an axial limiting and radial anti-rotation fit.

3. The independently mounted aroma-enhancing device for a handheld canister oxygen mask according to claim 1, characterized in that, The inlet filter (33) and outlet filter (35) both include a rigid plastic frame (331) and a microporous filter (332). The rigid plastic frame (331) and the cylindrical shell (31) are detachably connected by a buckle (312) so that the high-density impregnated sponge (34) can be replaced after the filter is removed.

4. The independently mounted aroma-enhancing device for a handheld canister oxygen mask according to claim 1, characterized in that, The cylindrical shell (31) has a hollow through-type receiving cavity (311) inside, and the high-density impregnated sponge (34) is adapted to fill the receiving cavity (311), with its two ends abutting against the inlet filter (33) and the outlet filter (35) respectively.

5. A stand-alone aroma enhancer for a handheld canister oxygen mask according to claim 1, characterized in that, The inlet filter (33) is used to filter out fine impurities in oxygen and to straighten the turbulent airflow from the handheld oxygen cylinder (1) into a uniform and stable airflow, so that the airflow penetrates the high-density impregnated sponge (34) vertically and evenly, avoiding uneven aroma release caused by turbulence.

6. A stand-alone aroma enhancer for a handheld canister oxygen mask according to claim 1, characterized in that, The outlet filter (35) is used to eliminate the local eddies generated after the airflow penetrates the high-density impregnated sponge (34) and to intercept the essential oil droplets carried out by the airflow, so that the aroma concentration output through the mask section (23) is uniform and stable, while preventing sponge debris from entering the mask section (23).

7. A stand-alone aroma enhancer for a handheld canister oxygen mask according to claim 1, characterized in that, The inlet filter (33), the high-density impregnated sponge (34), and the outlet filter (35) are arranged coaxially along the airflow direction of the oxygen channel of the mask to form a through-type aroma-enhancing air path, and this air path does not change the original direction and air supply principle of the oxygen channel of the mask.

8. A stand-alone aroma enhancer for a handheld canister oxygen mask according to claim 1, characterized in that, The elastic support sheet (32) is made of food-grade elastic plastic material.

9. A stand-alone aroma enhancer for a handheld canister oxygen mask according to claim 1, characterized in that, The food-grade aromatic essential oil is any one or more of orange essential oil, osmanthus essential oil, lemon essential oil, and jasmine essential oil.

10. A stand-alone aroma enhancer for a handheld canister oxygen mask according to claim 1, characterized in that, The oxygen flow pressure at the safe isolation location is lower than the internal pressure of the high-pressure oxygen tank, thus completely isolating the high-density impregnated sponge (34) and its adsorbed food-grade aromatic essential oil from the high-pressure oxygen tank.

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