Inlet air filter vat for VPSA (Vacuum Pressure Swing Adsorption) oxygen generator and VPSA oxygen generator

Abstract

The air inlet filtering barrel comprises an outer barrel shell, an inner barrel filter element and a barrel seat, the outer barrel shell is detachably connected with the barrel seat, a mounting opening is formed in the middle of one end of the outer barrel shell, an air inlet connector is formed in the middle of the barrel seat, and the mounting opening is communicated with the air inlet connector; one end of the inner barrel filter element is fixed to the mounting opening, and the other end of the inner barrel filter element is fixed to the air inlet connector; a one-way valve is arranged at one end of the inner barrel filter element, the air outlet end of the one-way valve is exposed out of the mounting opening of the outer barrel shell, the air inlet end of the one-way valve is opposite to the air inlet connector, a filtering stagnation element is arranged between the inner barrel filter element and the outer barrel shell, the filtering stagnation element is fixedly connected to the inner barrel filter element in a sleeving mode, and the inner barrel filter element is communicated with the filtering stagnation element; and an air outlet connector is further arranged on the barrel seat and is communicated with a space between the inner barrel filter element and the outer barrel shell. According to the utility model, the deposition of dust and other impurities in the air inlet filter vat can be effectively reduced, so that the air inlet filter vat is kept unobstructed, and the service life of the air inlet filter vat is prolonged.

Description

Technical Field

[0001] This utility model belongs to the technical field of oxygen generation and filtration equipment, specifically relating to an air intake filter for a VPSA oxygen generator and a VPSA oxygen generator. Background Technology

[0002] In modern industry and the medical field, oxygen concentrators are increasingly widely used, especially in scenarios requiring high-purity oxygen. VPSA (Vacuum Pressure Swing Adsorption) oxygen concentrators, as an important type, utilize the principle of physical adsorption, selectively adsorbing components such as nitrogen from the air using molecular sieves at room temperature, thereby achieving oxygen separation and enrichment. However, the quality of the air entering the VPSA oxygen concentrator directly affects the equipment's operating efficiency, lifespan, and the quality of the final oxygen produced. Therefore, the design of the air intake filtration system has become one of the key factors in optimizing the performance of VPSA oxygen concentrators.

[0003] Traditional VPSA oxygen generators have several problems with their air intake filtration devices: (1) Limited filtration effect: Traditional filtration devices may not be able to fully remove fine particulate matter and impurities carried in the air. Once these impurities enter the oxygen generator, they will not only reduce the adsorption efficiency of the molecular sieve, but may also cause equipment failure or shorten its service life. (2) Inconvenient maintenance: Some existing air intake filter barrels are complex in design and difficult to disassemble and assemble, making it difficult to clean and replace the filter element, which increases the equipment maintenance cost. (3) Insufficient self-cleaning ability: Some filtration systems lack an effective self-cleaning mechanism, which can easily cause filter element blockage after long-term use, thus affecting the normal operation of the entire system. (4) Poor sealing: Due to defects in structural design, some filtration devices may leak air during operation, affecting the stability and safety of the oxygen generation process.

[0004] To address the aforementioned issues and improve the performance and reliability of VPSA oxygen concentrators, this invention proposes an improved design for the air intake filter cartridge of a VPSA oxygen concentrator. This design aims to enhance filtration efficiency by optimizing the filter cartridge's structural layout, simplify maintenance procedures, and introduce a self-cleaning function to ensure stable long-term operation of the equipment, meeting the needs of various application scenarios. Utility Model Content

[0005] This utility model addresses the above-mentioned problems and overcomes the shortcomings of the existing technology by providing an air intake filter for a VPSA oxygen generator.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] An air intake filter for a VPSA oxygen concentrator includes an outer shell, an inner filter element, and a base. The outer shell and the base are detachably connected. An installation port is located at the center of one end of the outer shell away from the base, and an air inlet is located at the center of the base opposite the installation port, with the installation port communicating with the air inlet. The inner filter element is disposed in the center of the space formed by the outer shell and the base. One end of the inner filter element is sealed and fixed to the installation port, and the other end is sealed and fixed to the air inlet. A one-way valve is provided at one end of the inner filter element fixed to the installation port, with the outlet end of the one-way valve protruding outside the installation port of the outer shell. The inlet end of the one-way valve is directly opposite the air inlet. A filter retainer is disposed between the inner filter element and the outer shell, and the filter retainer is fixedly sleeved on the inner filter element, with communication between the inner filter element and the filter retainer. An air outlet is also provided on the base, communicating with the space between the inner filter element and the outer shell.

[0008] As a preferred embodiment of this utility model, a sealing ring is provided at one end of the inner barrel filter element, and the inner barrel filter element is sealed to the mounting port of the outer barrel shell through the sealing ring.

[0009] As another preferred embodiment of this utility model, one end of the inner barrel filter element is also provided with a snap-fit ​​platform, and the air outlet end of the one-way valve is fixedly connected to the snap-fit ​​platform.

[0010] As another preferred embodiment of this utility model, the inner barrel filter element is provided with elongated filter holes evenly distributed on it.

[0011] As another preferred embodiment of this utility model, the one-way valve is a duckbill valve.

[0012] As another preferred embodiment of this utility model, the outer barrel shell and the barrel base are connected by threads.

[0013] This utility model also provides a VPSA oxygen generator, including the air intake filter for the VPSA oxygen generator, which is used in conjunction with the vacuum compressor constituting the VPSA oxygen generator.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] (1) The present invention provides an air intake filter for a VPSA oxygen generator. Through the combined design of the inner filter element and the filter retaining element, it can effectively intercept small particulate matter and other impurities in the air, ensuring that the air entering the VPSA oxygen generator reaches a high purity standard.

[0016] (2) The detachable connection between the outer shell and the base of this utility model allows users to easily clean or replace the filter element, greatly reducing the maintenance difficulty and cost of the equipment.

[0017] (3) Under the overall structural design of this utility model, a unique self-cleaning mechanism is specially introduced. In the non-oxygen-generating working state of the VPSA oxygen generator, the filter core and inner barrel filter core can be blown and cleaned by the reverse high-pressure airflow provided by the vacuum compressor, which can effectively reduce the deposition of dust and other impurities in the air intake filter barrel. The one-way valve automatically opens under the action of reverse air pressure, so that the deposited dust can be discharged smoothly, thereby keeping the air intake filter barrel unobstructed and extending its service life.

[0018] (4) One end of the inner barrel filter element of this utility model is tightly connected to the installation port of the outer barrel shell through the sealing ring, which ensures the sealing of the entire filtration space and avoids the problem of oxygen concentration drop due to air leakage. Attached Figure Description

[0019] Figure 1 This is one of the three-dimensional structural schematic diagrams of an air intake filter for a VPSA oxygen generator according to this utility model.

[0020] Figure 2 This is the second three-dimensional structural schematic diagram of the air intake filter barrel for a VPSA oxygen generator according to this utility model.

[0021] Figure 3 This is one of the schematic diagrams of the internal structure of the air intake filter barrel for a VPSA oxygen generator according to this utility model.

[0022] Figure 4 This is the second schematic diagram of the internal structure of the air intake filter barrel for a VPSA oxygen generator according to this utility model.

[0023] The markings in the diagram are as follows: 1 is the inner filter element, 2 is the one-way valve, 3 is the outer shell, 4 is the base, 5 is the air outlet, 6 is the air inlet, 7 is the sealing ring, 8 is the snap-fit ​​platform, 9 is the filter retainer, and 10 is the filter hole. Detailed Implementation

[0024] 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.

[0025] Reference Figures 1 to 4This utility model provides an air intake filter for a VPSA oxygen concentrator, including an outer shell 3, an inner filter element 1, and a base 4. The outer shell 3 and the base 4 are detachably connected. An installation port is provided at the center of one end of the outer shell 3 away from the base 4, and an air intake interface 6 is provided at the center of the base 4 opposite to the installation port. The installation port communicates with the air intake interface 6. The inner filter element 1 is disposed in the center of the space formed by the outer shell 3 and the base 4. One end of the inner filter element 1 is sealed and fixed to the installation port, and the other end of the inner filter element 1... The inner barrel filter element 1 is sealed and fixed to the air inlet interface 6; a one-way valve 2 is provided at one end of the inner barrel filter element 1 fixed to the mounting port, the air outlet end of the one-way valve 2 is exposed outside the mounting port of the outer barrel shell 3, the air inlet end of the one-way valve 2 is directly opposite the air inlet interface 6, a filter retainer 9 is provided between the inner barrel filter element 1 and the outer barrel shell 3, the filter retainer 9 is fixedly sleeved on the inner barrel filter element 1, and there is communication between the inner barrel filter element 1 and the filter retainer 9; an air outlet interface 5 is also provided on the barrel base 4, and the air outlet interface 5 is connected to the space between the inner barrel filter element 1 and the outer barrel shell 3.

[0026] Specifically, a sealing ring 7 is provided at one end of the inner barrel filter element 1, and the inner barrel filter element 1 is sealed to the installation port of the outer barrel shell 3 through the sealing ring 7, which can ensure the airtightness of the space between the inner barrel filter element 1 and the outer barrel shell 3.

[0027] Specifically, one end of the inner filter element 1 is also provided with a locking platform 8, and the outlet end of the one-way valve 2 is fixedly connected to the locking platform 8; the one-way valve 2 adopts a duckbill valve, which can ensure that the airflow can only enter from the inlet end of the one-way valve 2 and exit from the outlet end, without generating backflow; the one-way valve effectively prevents unpurified external air from flowing back into the oxygen generator, ensuring the safety and stability of the oxygen generation process.

[0028] Specifically, the inner barrel filter element 1 is evenly provided with elongated filter holes 10. The filter assembly composed of the inner barrel filter element 1 and the filter retainer 9 can effectively filter the air entering the intake filter barrel of the VPSA oxygen concentrator. The design of the elongated filter holes 10 increases the filtration area, improves the air handling capacity per unit time, and enhances the overall filtration effect.

[0029] Specifically, the outer barrel shell 3 and the barrel base 4 are connected by threads, which facilitates the assembly and disassembly of the outer barrel shell 3 and the barrel base 4.

[0030] This utility model embodiment also provides a VPSA oxygen generator, including the VPSA oxygen generator inlet filter, which is used in conjunction with the vacuum compressor constituting the VPSA oxygen generator.

[0031] The working principle of this utility model is explained in conjunction with its technical solution and accompanying drawings: The air inlet filter for this VPSA oxygen concentrator is a crucial component of the VPSA oxygen concentrator, i.e., a vacuum pressure swing adsorption oxygen concentrator. This air inlet filter works in conjunction with the vacuum compressor, the core component of the VPSA oxygen concentrator; for example... Figure 3 and Figure 4 As shown, Figure 3 The arrows indicate the airflow direction within the VPSA oxygen concentrator's intake filter during normal oxygen production. At this time, outside air enters the inner filter element 1 through the intake port 6, is filtered by the filter retainer 9, and then enters the space between the inner filter element 1 and the outer shell 3. From there, it enters the vacuum compressor through the outlet port 5, achieving positive pressure intake for the vacuum compressor and completing the filtration and cleaning of the outside air entering it. Because the vacuum compressor operates with positive pressure intake, the one-way valve 2 is closed at this time. Additionally... Figure 4 The arrows indicate the airflow direction within the VPSA oxygen concentrator's air intake filter during the self-cleaning process of the vacuum compressor. At this time, the air inlet 6 of the VPSA oxygen concentrator's air intake filter stops receiving outside air. The reverse high-pressure airflow provided by the vacuum compressor enters the space between the inner filter element 1 and the outer shell 3 through the air outlet 5 of the VPSA oxygen concentrator's air intake filter, passes through the filter retainer 9, and enters the inner filter element 1. This allows for high-pressure airflow purging of the filter retainer 9 and the inner filter element 1. Due to the reverse high-pressure airflow, the one-way valve 2 opens, allowing dust deposited on the filter retainer 9 and the inner filter element 1 to be discharged from the VPSA oxygen concentrator's air intake filter through the one-way valve 2.

[0032] The reasonable layout of the air inlet 6 and air outlet 5 in this invention, combined with the positioning of the one-way valve 2, ensures smooth airflow throughout the entire air inlet filter, reduces unnecessary pressure loss, and improves the overall energy efficiency ratio of the oxygen generator system. Especially when switching between positive pressure intake and reverse purging modes, it can quickly respond and adapt to different operating conditions.

[0033] In summary, this invention not only solves many problems existing in the prior art, but also provides a more reliable and efficient air intake filtration solution for VPSA oxygen concentrators, which is suitable for a variety of industrial and medical applications and has broad market application prospects.

[0034] The above-described embodiments are merely preferred embodiments of this utility model and not all embodiments. This utility model may have other implementation methods. The above embodiments are only used to explain this utility model and should not be considered as limiting the scope of implementation of this utility model, nor do they constitute a limitation on the protection scope of this utility model. There are many ideas, methods and approaches to implement this technical solution. It should be noted that, without departing from the structural principle of this utility model, all other related embodiments obtained by those skilled in the art without making any inventive effort, or any technical solutions formed by equivalent substitution or equivalent transformation, fall within the protection scope of the claims of this utility model.

[0035] Furthermore, although certain terms are used in this specification, these terms are merely for the convenience of describing the present invention and do not constitute any limitation on the present invention.

Claims

1. An air intake filter for a VPSA oxygen concentrator, characterized in that: The device includes an outer casing, an inner filter element, and a base. The outer casing and the base are detachably connected. An installation port is located at the center of one end of the outer casing furthest from the base, and an air inlet is located at the center of the base opposite the installation port. The installation port communicates with the air inlet. The inner filter element is located in the center of the space formed by the outer casing and the base. One end of the inner filter element is sealed and fixed to the installation port, and the other end is sealed and fixed to the air inlet. A one-way valve is provided at one end of the inner filter element fixed to the installation port. The outlet end of the one-way valve protrudes outside the casing, and the inlet end of the one-way valve is directly opposite the air inlet. A filter retainer is provided between the inner filter element and the outer casing, and is fixedly sleeved on the inner filter element. The inner filter element and the filter retainer are connected. An air outlet is also provided on the base, and the air outlet communicates with the space between the inner filter element and the outer casing.

2. The air intake filter for a VPSA oxygen concentrator according to claim 1, characterized in that: The inner barrel filter element is provided with a sealing ring at one end, and the inner barrel filter element is sealed to the installation port of the outer barrel shell through the sealing ring.

3. The air intake filter for a VPSA oxygen concentrator according to claim 1, characterized in that: One end of the inner barrel filter element is also provided with a snap-fit ​​platform, and the outlet end of the one-way valve is fixedly connected to the snap-fit ​​platform.

4. The air intake filter for a VPSA oxygen concentrator according to claim 1, characterized in that: The inner barrel filter element has elongated filter holes evenly distributed on it.

5. The air intake filter for a VPSA oxygen concentrator according to claim 1, characterized in that: The one-way valve is a duckbill valve.

6. The air intake filter for a VPSA oxygen concentrator according to claim 1, characterized in that: The outer barrel shell and the barrel base are connected by threads.

7. A VPSA oxygen concentrator, characterized in that: The VPSA oxygen generator includes an air intake filter cartridge as described in any one of claims 1 to 6, wherein the air intake filter cartridge is used in conjunction with a vacuum compressor constituting the VPSA oxygen generator.

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