A replaceable filter assembly for a respiratory oxygen concentrator

Abstract

The utility model relates to oxygen -making machine technical field especially for a kind of replaceable filter assembly of respiratory oxygen -making machine, including wet water cup filter box, the top end of wet water cup filter box is clamped and is equipped with sealing cover, the air inlet end and the air outlet end of sealing cover are all fixed with pipe connection component;Pipe connection component includes pipe body, the inside of pipe body is equipped with sliding cavity, and the inside of sliding cavity is installed with dismounting trigger mechanism, the center of pipe body inside is fixed with hose plug-in pipe, the bottom of pipe body inside is equipped with installation cavity, the inside bottom of installation cavity is installed with elastic limiting ring, the inside of elastic limiting ring is equipped with the elastic groove of circular array, in the utility model, solve the problem that traditional anti-skid groove inserts and is easily caused by hose inner diameter expansion to cause air leakage, simultaneously avoid the unlocking caused by accidental touch, ensure the connection stability, avoid the oxygen concentration drop risk caused by air leakage under medical scene, improve oxygen -making machine operation reliability and user experience.

Description

Technical Field

[0001] This utility model relates to the field of oxygen concentrator technology, specifically a replaceable filter component for a respiratory oxygen concentrator. Background Technology

[0002] The filtration components of a breathing oxygen concentrator are the core modules that ensure the purity of oxygen. They mainly include pre-filters, HEPA filters, and bacterial filters, which can intercept particles such as dust, bacteria, and viruses in layers to ensure that the oxygen is sterile and safe. The wet cup filter box does not directly participate in filtration, but it precipitates tiny impurities in the oxygen by precipitating them with internal moisture and humidifies the oxygen to reduce irritation to the nasal mucosa and improve the comfort of oxygen inhalation. In existing technologies, the connecting tube of the wet cup filter box and the external hose are fixed by "anti-slip groove insertion". Frequent insertion and removal can easily lead to the expansion of the inner diameter of the hose and the decrease of friction. This can cause accidental separation and air leakage during use due to pulling, affecting the normal use of the oxygen concentrator and the user experience. Especially in medical scenarios, air leakage may reduce the oxygen concentration and threaten the patient's recovery. Therefore, a replaceable filter component for a breathing oxygen concentrator is proposed to address the above problems. Utility Model Content

[0003] The purpose of this invention is to provide a replaceable filter assembly for a respiratory oxygen concentrator to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A replaceable filter assembly for a breathing oxygen concentrator includes a wet cup filter box with a sealing cap snapped onto its top. Both the air inlet and outlet ends of the sealing cap are fixed with connecting pipe assemblies. The connecting pipe assembly includes a connecting pipe body with a sliding cavity on its inner side. A disassembly trigger mechanism is installed inside the sliding cavity. A flexible hose insertion pipe is fixed at the center inside the connecting pipe body. An installation cavity is formed at the bottom inner side of the connecting pipe body. An elastic limiting ring is installed at the bottom inner side of the installation cavity. An elastic groove in a circular array is formed on the inner side of the elastic limiting ring. A trigger ring is installed above the elastic limiting ring.

[0005] As a further optimization of this utility model, the disassembly triggering mechanism includes a pressing rod, which is slidably disposed inside the sliding cavity. A pressing ring is fixed to the top end of the pressing rod, and a limiting block is fixed to the bottom end of the pressing rod. A spring cavity that communicates with each other is opened inside the pressing rod and the limiting block, and a support spring is installed inside the spring cavity.

[0006] As a further optimization of this utility model, the pressing ring is located above the main body of the connecting pipe, the outer side of the limiting block is slidably engaged with the top of the inner side of the mounting cavity, the position of the limiting block is located above the trigger ring, and the center of the limiting block and the center of the pressing ring are located on the same central axis.

[0007] As a further optimization of this utility model, the following features are provided: the support spring extends below the limiting block, the bottom end of the support spring contacts the upper surface of the trigger ring, the strong spring is located at the halfway point inside the support spring, and the top ends of both the support spring and the strong spring are fixedly connected to the pressing rod.

[0008] As a further optimization of this utility model, the elastic limiting ring has an internal cavity structure, the inner side of the elastic groove is connected to the inside of the elastic limiting ring, and the inner side of the trigger ring is sleeved on top of the inner side of the elastic limiting ring.

[0009] As a further optimization of this utility model, a one-way pipe is installed below the connecting pipe assembly at the air inlet end. The one-way pipe extends into the bottom of the inner side of the wet water cup filter box. The top end of the one-way pipe is fixedly connected to the bottom end of the hose connector. An anti-slip groove is provided on the outer side of the hose connector.

[0010] As a further optimization of this utility model, the inner side of the elastic limiting ring has a conical structure, and the conical angle of the elastic limiting ring is 30°.

[0011] Compared with the prior art, the beneficial effects of this utility model are: In this invention, an elastic limiting ring, a trigger ring, and a disassembly trigger mechanism are set to form an anti-disengagement structure with internal and external double constraints. This also prevents accidental unlocking and solves the problem of air leakage caused by the expansion of the inner diameter of the hose in traditional anti-slip groove insertion. Combined with a stainless steel support spring and a conical transmission design, one-button unlocking and self-resetting are achieved, ensuring connection stability and avoiding the risk of oxygen concentration drop caused by air leakage in medical scenarios. This improves the reliability of oxygen concentrator operation and user experience. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the disassembled structure of the sealing cap of this utility model; Figure 3 This is a schematic diagram of the structure of the pipe assembly of this utility model; Figure 4 This is a cross-sectional structural diagram of the main body of the connector of this utility model; Figure 5 This is a schematic diagram of the disassembly trigger mechanism of this utility model; Figure 6 This is a schematic diagram of the structure of the elastic limiting ring of this utility model; Figure 7 This is a schematic diagram of the back structure of the elastic limiting ring of this utility model.

[0013] In the picture: 1. Wet water cup filter box; 2. Sealing lid; 3. Connector assembly; 31. Connector body; 32. Sliding cavity; 33. Disassembly trigger mechanism; 331. Pressing rod; 332. Pressing ring; 333. Limiting block; 334. Spring cavity; 335. Support spring; 336. Strong spring; 34. Hose connector; 35. Mounting cavity; 36. Elastic limiting ring; 37. Elastic groove; 38. Trigger ring; 39. Anti-slip groove; 4. One-way tube. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0016] Please see Figures 1-7 This utility model provides a technical solution: A replaceable filter assembly for a breathing oxygen concentrator includes a wet cup filter box 1, a sealing cap 2 is snapped onto the top of the wet cup filter box 1, and a connecting pipe assembly 3 is fixed to both the air inlet and air outlet ends of the sealing cap 2; the connecting pipe assembly 3 includes a connecting pipe body 31, a sliding cavity 32 is formed on the inner side of the connecting pipe body 31, a disassembly trigger mechanism 33 is installed inside the sliding cavity 32, a flexible hose insertion pipe 34 is fixed at the center inside the connecting pipe body 31, an installation cavity 35 is formed on the bottom inner side of the connecting pipe body 31, an elastic limiting ring 36 is installed on the bottom inner side of the installation cavity 35, the inner side of the elastic limiting ring 36 has a conical structure, the conical angle of the elastic limiting ring 36 is 30°, the inner side of the elastic limiting ring 36 has an elastic groove 37 arranged in a circular array, and a trigger ring 38 is installed above the elastic limiting ring 36. Specifically, the wet cup filter box 1 has a transparent cavity structure, which allows for direct observation of the liquid level and impurity sedimentation. The top and the sealing cap 2 are connected in an airtight manner through a silicone sealing ring. The cone angle of the elastic limiting ring 36 is 30°. Experiments have verified that the radial force conversion efficiency is the highest at this angle, and the unlocking force is ≤5N. As a further implementation of this solution, the disassembly trigger mechanism 33 includes a pressing rod 331, which is slidably disposed inside the sliding cavity 32. A pressing ring 332 is fixed to the top of the pressing rod 331, and a limiting block 333 is fixed to the bottom of the pressing rod 331. A spring cavity 334 is provided inside the pressing rod 331 and the limiting block 333, which are interconnected. A support spring 335 is installed inside the spring cavity 334. The pressing ring 332 is located above the connecting pipe body 31. The outer side of the limiting block 333 is slidably engaged with the top of the inner side of the mounting cavity 35. The position of the limiting block 333 is above the trigger ring 38. The center of the limiting block 333 and the center of the pressing ring 332 are located on the same central axis. Specifically, the edge of the pressing ring 332 is provided with anti-slip texture to facilitate the application of force. The limiting block 333 slides with the mounting cavity 35 to ensure that it moves vertically downward without deviation when pressed. The depth of the spring cavity 334 is adapted to the compression stroke of the support spring 335 to ensure that the limiting block 333 and the trigger ring 38 maintain a preset distance in the natural state to avoid accidental triggering of unlocking. This design of the disassembly trigger mechanism 33 also improves the portability of operation. As a further implementation of this solution, the support spring 335 extends below the limiting block 333, the bottom end of the support spring 335 contacts the upper surface of the trigger ring 38, the position of the strong spring 336 is located at the halfway point inside the support spring 335, the top ends of the support spring 335 and the top ends of the strong spring 336 are both fixedly connected to the pressing rod 331, and the axis of the support spring 335 and the axis of the strong spring 336 are located on the same central axis. Specifically, the support spring 335 and the strong spring 336 are made of stainless steel. The elastic coefficient of the strong spring 336 is 1.5 times that of the support spring 335. The length of the strong spring 336 is half the length of the support spring 335. In its natural state, the preload of the support spring 335 keeps the trigger ring 38 and the elastic limit ring 36 separated. When pressed, the support spring 335 is compressed and stored. The strong spring 336 is further compressed and stored. After releasing, the disassembly trigger mechanism 33 is quickly driven to reset. As a further implementation of this solution, the interior of the elastic limiting ring 36 is a hollow structure, the inner side of the elastic groove 37 is connected to the interior of the elastic limiting ring 36, and the inner side of the trigger ring 38 is sleeved on top of the inner side of the elastic limiting ring 36. Specifically, the hollow structure of the elastic limiting ring 36 reduces weight and improves elasticity; the evenly distributed elastic grooves 37 balance the force; the rounded corners of the grooves prevent scratching the hose; the inner side of the trigger ring 38 is tapered to match the outer side of the elastic limiting ring 36; when pressed, the axial force is converted into radial force through the contact of the conical surface, causing the elastic limiting ring 36 to expand evenly and ensuring complete unlocking. As a further implementation of this solution, a one-way pipe 4 is installed below the air inlet pipe assembly 3. A one-way valve is installed inside the one-way pipe 4. The one-way pipe 4 extends into the bottom of the wet water cup filter box 1. The top end of the one-way pipe 4 is connected to the bottom end of the hose insertion pipe 34. An anti-slip groove 39 is provided on the outside of the hose insertion pipe 34. Specifically, the one-way tube 4 is made of food-grade silicone material, with a beveled cut at the bottom to increase the contact area with the liquid and improve filtration efficiency. The anti-slip grooves 39 are continuously distributed in a spiral shape, which engage with the inner wall of the hose to enhance friction. Together with the elastic limiting ring 36, they hold tightly on the outside to form a double anti-detachment, solving the problem of easy failure of traditional single anti-slip structures.

[0017] Work process: Open the wet cup filter box 1, pour in pure water to cover the bottom of the one-way tube 4 but below the air inlet of the hose connector 34, fasten the sealing cover 2, press the pressing ring 332 to the bottom, observe whether the disassembly trigger mechanism 33 moves down smoothly, after releasing, the support spring 335 should immediately return to its original position, the elastic limit ring 36 should return to its natural state, align the air supply hose with the hose connector 34, and rotate and push it along the spiral anti-slip groove 39; When the front end of the hose contacts the elastic limiting ring 36, the elastic groove 37 is compressed and contracted, and the elastic limiting ring 36 expands radially to φ16.5mm, generating an initial clamping force of about 3N. After the hose is fully inserted, the anti-slip groove 39 forms a mechanical engagement with the inner wall of the hose, providing about 5N of static friction. The elastic limiting ring 36 applies about 4N of clamping force to the outer wall of the hose through the elastic groove 37, forming "double constraint inside and outside". When the hose is pulled by external force, the elastic groove 37 further contracts, and the clamping force increases linearly with the pulling force, up to a maximum of 12N, effectively resisting accidental dislodgement. The oxygen output from the oxygen generator enters the bottom of the wet water cup through the inlet hose connector 34 and the one-way pipe 4. As the bubbles rise, dust particles are adsorbed by the liquid. The purified gas rises to the outlet hose connector 34. The elastic groove 37 of the elastic limiting ring 36 serves as a pressure balance channel to ensure that the pressure difference between the inside and outside of the wet water cup is <0.5kPa, preventing liquid backflow. When the hose needs to be disassembled, press the pressing ring 332 with your thumb. The disassembly trigger mechanism 33 moves down, and the limiting block 333 squeezes the trigger ring 38. During this process, the support spring 335 is compressed first, and the strong spring 336 is compressed later, achieving an initial elastic force of 5N. After pressing to 1 / 2 stroke, the elastic force increases to 8N to prevent accidental unlocking. The inner conical surface of the trigger ring 38 pushes the elastic limiting ring 36 to expand radially. The conical angle of the elastic limiting ring 36 is 30°. Experiments have verified that the radial force conversion efficiency is the highest at this angle, with an unlocking force ≤5N. The elastic groove 37 is fully opened, the clamping force disappears, and the hose is pulled out. Release the pressing ring 332, and the support spring 335 drives the disassembly trigger mechanism 33 to reset. The elastic limiting ring 36 returns to its initial state, ready for the next connection.

[0018] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A replaceable filter assembly for a breathing oxygen concentrator, comprising a wet water cup filter box (1), characterized in that: The top of the wet cup filter box (1) is fitted with a sealing cap (2), and the air inlet and outlet of the sealing cap (2) are both fixed with a connecting pipe assembly (3). The connector assembly (3) includes a connector body (31), a sliding cavity (32) is provided on the inner side of the connector body (31), a disassembly trigger mechanism (33) is installed inside the sliding cavity (32), a hose insertion connector (34) is fixed at the center inside the connector body (31), an installation cavity (35) is provided at the bottom of the inner side of the connector body (31), an elastic limiting ring (36) is installed at the bottom of the inner side of the installation cavity (35), an elastic groove (37) arranged in a circular array is provided on the inner side of the elastic limiting ring (36), and a trigger ring (38) is installed above the elastic limiting ring (36).

2. The replaceable filter assembly of a respiratory oxygen concentrator according to claim 1, characterized in that: The disassembly triggering mechanism (33) includes a pressing rod (331), which is slidably disposed inside the sliding cavity (32). A pressing ring (332) is fixed at the top of the pressing rod (331), and a limiting block (333) is fixed at the bottom of the pressing rod (331). A spring cavity (334) is provided inside the pressing rod (331) and the limiting block (333) and is connected to each other. A support spring (335) and a strong spring (336) are installed inside the spring cavity (334).

3. The replaceable filter assembly of a respiratory oxygen concentrator according to claim 2, characterized in that: The pressing ring (332) is located above the main body (31) of the connector. The outer side of the limiting block (333) is slidably engaged with the top of the inner side of the mounting cavity (35). The position of the limiting block (333) is above the trigger ring (38). The center of the limiting block (333) and the center of the pressing ring (332) are on the same central axis.

4. The replaceable filter assembly of a respiratory oxygen concentrator according to claim 2, characterized in that: The support spring (335) extends below the limiting block (333), the bottom end of the support spring (335) contacts the upper surface of the trigger ring (38), the position of the strong spring (336) is located at halfway inside the support spring (335), and the top ends of the support spring (335) and the top ends of the strong spring (336) are fixedly connected to the pressing rod (331).

5. The replaceable filter assembly of a respiratory oxygen concentrator according to claim 1, characterized in that: The interior of the elastic limiting ring (36) is a cavity structure. The inner side of the elastic groove (37) is connected to the interior of the elastic limiting ring (36). The inner side of the trigger ring (38) is sleeved on the upper part of the inner side of the elastic limiting ring (36).

6. The replaceable filter assembly of a respiratory oxygen concentrator according to claim 1, characterized in that: A one-way pipe (4) is installed below the air inlet end connector assembly (3). The one-way pipe (4) extends into the bottom of the wet water cup filter box (1). The top end of the one-way pipe (4) is connected to the bottom end of the hose connector (34). The outer side of the hose connector (34) is provided with an anti-slip groove (39).

7. The replaceable filter assembly of a respiratory oxygen concentrator according to claim 1, characterized in that: The inner side of the elastic limiting ring (36) has a conical structure, and the conical angle of the elastic limiting ring (36) is 30°.

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