Water-free humidifying module and oxygen generator

By placing the inlet and outlet pipes on the same side in the oxygen generator and utilizing a humidification pipeline with a partition and a water-permeable structure, the problem of complex structure of the waterless humidification module is solved, achieving a compact and convenient pipeline connection and improving oxygen humidity and dehumidification effect.

CN223504664UActive Publication Date: 2025-11-04QINGDAO AUGREENER ELECTRONICS TECH
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Patent Information

Application Number
CN202422376636.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-27
Publication Date
2025-11-04
Estimated Expiration
2034-09-27

AI Technical Summary

Technical Problem

The existing oxygen generators have complex waterless humidification modules, which makes pipeline connections inconvenient and makes it difficult to achieve a compact and convenient design.

Method used

The air inlet and outlet pipes are located on the same side of the casing, and a through-hole is formed by a partition to meet the normal humidification requirements of the air path. At the same time, the humidification pipe has a water-permeable structure to increase the gas contact area and time.

Benefits of technology

The simplified piping connection and reduced internal space occupation have resulted in a compact and convenient oxygen generator, while also improving oxygen humidity and dehumidification effects.

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Abstract

The utility model discloses a water-free humidifying module and an oxygen generator, the water-free humidifying module comprises a shell, a water inlet pipe, a water outlet pipe, a water inlet pipe and a water outlet pipe, the air inlet pipe and the air outlet pipe are arranged on the air inlet chamber and the air outlet chamber respectively and located at the same end of the shell. At least one part of the humidifying pipeline passes through the air inlet chamber, and all or part of the pipe wall of the humidifying pipeline located in the air inlet chamber is of a water permeable structure; the partition plate is arranged in the shell and used for separating the air inlet chamber from the air outlet chamber, and a through opening used for communicating the air inlet chamber with the air outlet chamber is formed in the partition plate. The air inlet pipe and the air outlet pipe are arranged on the same side of the shell, rapid connection of the air inlet pipe and the air outlet pipe with an air inlet pipeline of the compressor is facilitated, the internal occupied space is reduced, the structure is more compact and simplified, and meanwhile the normal humidification requirement is met by matching with an air path formed by the partition plate.
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Description

Technical Field

[0001] This utility model belongs to the field of oxygen generator technology, specifically relating to an anhydrous humidification module and an oxygen generator having the anhydrous humidification module. Background Technology

[0002] An oxygen concentrator is a device that extracts oxygen from the air. It involves two gas processing stages: first, drying and filtering the oxygen gas entering the compressor to prevent contamination; and second, humidifying the produced oxygen to improve the comfort of the user. The application of anhydrous humidification in oxygen concentrators is illustrated in Chinese utility model patent CN200480037382.X, but this is primarily a principle design. In practical applications, the structure of oxygen concentrators requires appropriate adjustments to meet current design demands for compactness, ease of piping connection, and miniaturization. The information disclosed in this background section is solely for enhancing understanding of the background technology and may include prior art not known to those skilled in the art. Summary of the Invention

[0003] This utility model addresses the aforementioned problems in the prior art by proposing a waterless humidification module. Considering the compact structure of the oxygen generator and the convenience of pipeline connection, the inlet and outlet pipes are set on the same side to facilitate quick connection with the compressor's inlet pipe, and a partition is set to meet the normal humidification requirements of the gas circuit.

[0004] To achieve the above-mentioned objectives, the present invention employs the following technical solution:

[0005] A waterless humidification module, comprising:

[0006] The casing contains an air inlet chamber and an air outlet chamber.

[0007] An air inlet pipe and an air outlet pipe are respectively provided on the air inlet chamber and the air outlet chamber, and are located at the same end of the housing;

[0008] The humidification pipeline passes through the air intake chamber in at least a portion, and all or part of the pipe wall of the humidification pipeline located in the air intake chamber is a water-permeable structure.

[0009] A partition is disposed inside the housing to separate the air inlet chamber and the air outlet chamber, and the partition has a through opening for connecting the air inlet chamber and the air outlet chamber.

[0010] In some embodiments of this application, the air inlet pipe and the air outlet pipe are coaxially arranged and located on the side of the housing, and the air inlet and the air outlet pipe are respectively provided with an air inlet and an air outlet at the connection between the air inlet pipe and the air inlet chamber and at the connection between the air outlet pipe and the air outlet chamber.

[0011] In some embodiments of this application, the through port and the air inlet pipe are located at both ends of the housing.

[0012] In some embodiments of this application, the cross-sectional area of ​​the air inlet chamber is larger than the cross-sectional area of ​​the air outlet chamber.

[0013] In some embodiments of this application, the air outlet chamber is filled with sound-absorbing cotton and / or filter cotton, and the water-permeable structure is a fiber membrane.

[0014] In some embodiments of this application, the gas flow direction in the humidification pipeline is opposite to the gas flow direction in the air intake chamber.

[0015] In some embodiments of this application, both ends of the air intake chamber are provided with perforated plates, and the perforated plates are provided with a number of regularly arranged holes, and a number of the humidification pipes pass through the holes.

[0016] In some embodiments of this application, the air inlet chamber is provided with an air inlet cavity and an air outlet cavity at both ends, the perforated plate is provided between the air inlet cavity and the air inlet chamber and between the air outlet cavity and the air inlet chamber, and the air inlet cavity and the air outlet cavity are respectively provided with an air inlet nozzle and an air outlet nozzle.

[0017] In some embodiments of this application, the air intake chamber extends above the air intake cavity, and the air intake nozzle is disposed close to the air intake pipe; or, the air outlet chamber extends above the air intake cavity, and the air outlet nozzle is disposed away from the air intake pipe. In some embodiments of this application, the air intake pipe is in communication with the outside air.

[0018] Based on the above-mentioned waterless humidification module, this application also provides an oxygen generator having the above-mentioned waterless humidification module, which can realize the compact structure of the oxygen generator product and the convenience of pipeline connection.

[0019] An oxygen generator includes the aforementioned anhydrous humidification module, wherein the air inlet pipe and the air outlet pipe are connected to the air inlet pipe of the oxygen generator, and the humidification pipe is connected to the oxygen delivery pipe of the oxygen generator.

[0020] In some embodiments of this application, the anhydrous humidification module is independently configured. Compared with the prior art, the advantages and positive effects of this utility model are:

[0021] Conventional waterless humidification modules have a bidirectional symmetrical structure for the compressor gas circuit and oxygen gas circuit, requiring separate connections at both ends when connecting pipelines. This results in complex spatial layout and inconvenience in pipeline connection. This application places the inlet pipe and outlet pipe on the same side of the housing, which facilitates quick connection between the inlet pipe and outlet pipe and the compressor inlet pipe, thereby reducing its internal space occupation and making the structure more compact and simplified. At the same time, the gas circuit formed by the partition meets the normal humidification requirements.

[0022] Other features and advantages of this utility model will become clearer after reading the specific embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of the first embodiment of the waterless humidification module proposed in this utility model;

[0025] Figure 2 for Figure 1 A cross-sectional structural diagram;

[0026] Figure 3 for Figure 2 A schematic diagram of the structure after the penetration module has been removed;

[0027] Figure 4 This is a schematic diagram of a vertical cross-section of the shell;

[0028] Figure 5 for Figure 1 A diagram from another angle;

[0029] Figure 6 This is a schematic diagram of the structure of a second embodiment of the waterless humidification module proposed in this utility model;

[0030] Figure 7 for Figure 6 A cross-sectional view of the middle shell;

[0031] Figure 8 This is a schematic diagram of the structure of an embodiment of an oxygen generator proposed in this utility model;

[0032] Among them, 100 are oxygen concentrators;

[0033] Box 10;

[0034] Anhydrous humidification module 60;

[0035] Shell 61; Inlet chamber 611; Outlet chamber 612; Partition 613; Partition protrusion 6131; Through port 614; Perforated plate 615; Inlet cavity 616; Inlet nozzle 6161; Outlet cavity 617; Outlet nozzle 6171; Bottom wall 618; Groove 6181; Shell wall 619; Inlet port 6191; Outlet port 6192; Inlet pipe 62;

[0036] Air outlet pipe 63;

[0037] Humidification piping 64. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0039] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," and "right," etc., indicate the orientation or positional relationship based on the positional relationship shown in the accompanying drawings, with the direction closer to the center of the housing being "inner," and the opposite being "outer." These terms are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided, but those skilled in the art will recognize the application of other processes and / or the use of other materials. Example

[0043] See Figures 1-5 , Figure 8 This is the first embodiment of a waterless humidification module proposed in this utility model. A waterless humidification module 60 uses the moisture in the air to humidify the oxygen output by the oxygen generator 100; at the same time, it can dehumidify the incoming oxygen gas, with some of the moisture in the oxygen gas entering the oxygen, thus achieving both humidification and dehumidification of the oxygen gas.

[0044] A waterless humidification module 60 includes: a housing 61, an inlet pipe 62, an outlet pipe 63, and a humidification pipeline 64. The housing 61 contains an inlet chamber 611 and an outlet chamber 612. The inlet pipe 62 and the outlet pipe 63 are respectively located on the inlet chamber 611 and the outlet chamber 612, and are situated at the same end of the housing 61. Conventional waterless humidification modules, due to the bidirectional symmetrical structure of the compressor and oxygen gas lines, require separate connections at both ends during pipeline connection, resulting in spatial complexity and inconvenience in pipeline connection. This application addresses this by placing the inlet pipe 62 and the outlet pipe 63 on the same side of the housing 61, facilitating rapid connection between the inlet pipe 62 and the compressor inlet pipeline, reducing internal space occupation, and thus making the structure more compact and simplified.

[0045] In this embodiment, at least a portion of the humidification pipe 64 passes through the air intake chamber 611, meaning at least a portion of the humidification pipe 64 is located within the air intake chamber 611, and all or part of the pipe wall of the humidification pipe 64 located within the air intake chamber is a water-permeable structure. This water-permeable structure allows moisture to enter the interior, humidifying the oxygen within the humidification pipe 64. Simultaneously, the air intake pipe 62 is used to introduce outside air into the air intake chamber 611, and some moisture in the air permeates into the humidification pipe 64, humidifying the oxygen within it. The air outlet pipe 63 is used to output the dehumidified gas from the air outlet chamber 612. Moisture in the outside air entering through the air intake pipe 62 permeates into the humidification pipe 64, increasing the oxygen humidity; simultaneously, it dehumidifies the gas within the air intake chamber 611, delivering it to the compressor as oxygen-generating gas. This helps reduce moisture entering the oxygen generation system and prevents moisture corrosion of the flowing components.

[0046] In this embodiment, in order to ensure that the air inlet pipe 62 and the air outlet pipe 63 are located at the same end of the housing 61, a partition 613 is provided inside the housing 61 to separate the air inlet chamber 611 and the air outlet chamber 612. A through-hole 614 is provided on the partition 613 to connect the air inlet chamber 611 and the air outlet chamber 612. The air inlet pipe 62 and the air outlet pipe 63 are located on the same side of the through-hole 614. By setting the partition 613, the direction of the gas changes after passing through the through-hole 614, which means that the air inlet pipe 62 and the air outlet pipe 63 are located at the same end of the housing 61.

[0047] In some embodiments of this application, the cross-sectional area of ​​the inlet chamber 611 is larger than that of the outlet chamber 612. The inlet chamber 611 dehumidifies the gas and humidifies the oxygen in the humidification pipe 64; the outlet chamber 612 is mainly used to transport the gas to the outlet pipe 63; the gas flow direction in the inlet chamber 611 is opposite to the gas flow direction in the outlet chamber 612, so that the gas in the inlet chamber 611 flows away from the inlet pipe 62, thereby increasing the contact area and contact time with the humidification pipe 64, achieving a better oxygen humidification effect; then the gas enters the outlet chamber 612 through the through port 614, and the gas flows towards the outlet pipe 63. The gas in the inlet chamber 611 refers to the gas entering from the inlet pipe 62.

[0048] In some embodiments of this application, the exhaust chamber 612 is filled with sound-absorbing cotton and / or filter cotton to achieve sound absorption and filtration of the gas. The water-permeable structure can be a fiber membrane, through which moisture can permeate.

[0049] In some embodiments of this application, the flow direction of the gas in the air intake chamber 611 is opposite to the flow direction of the oxygen in the humidification pipe 64, so that more moisture can enter the interior through the pipe wall of the humidification pipe 64.

[0050] In some embodiments of this application, the air inlet pipe 62 and the air outlet pipe 63 are coaxially arranged and located on the side of the housing 61. An air inlet 9161 is provided at the connection between the air inlet pipe 62 and the air inlet chamber 611, and an air outlet 9192 is provided at the connection between the air outlet pipe 63 and the air outlet chamber 612.

[0051] In some embodiments of this application, an air inlet 6191 connected to the air inlet pipe 62 is provided on the shell wall 619 of the housing 61. The air inlet 6191 is arranged parallel to the axis of the air inlet pipe 62, and the axial dimension of the air inlet 6191 in the air inlet pipe 62 is the same as the internal height of the air inlet chamber 611. This allows the gas transported by the air inlet pipe 62 to enter the air inlet chamber 611 through the air inlet 6191, and then fill the interior of the air inlet chamber 611 in terms of height, and then flow inside the air inlet chamber 611. This helps to increase the contact area between the gas and the humidification pipe 64. Preferably, the through port 614 and the air inlet pipe 62 are located at both ends of the housing 61. The air inlet 6191 is arranged parallel to the axis of the air inlet pipe 62, and the axial dimension of the air inlet 6191 in the air inlet pipe 62 is the same as the internal height of the air inlet chamber 611; this allows the gas transported by the air inlet pipe 62 to enter the air inlet chamber 611 through the air inlet 6191, and then fill the interior of the air inlet chamber 611 in terms of height, and then flow inside the air inlet chamber 611; this helps to increase the contact area between the gas and the permeation module 64.

[0052] In some embodiments of this application, the air outlet 6192 is arranged parallel to the axis of the air outlet pipe 63. A downwardly protruding groove 6181 is provided on the bottom wall 618 of the housing 61, which communicates with the air outlet 6192 and is connected to the air outlet connection part 632. By providing the groove 6181, it is beneficial to increase the opening area between the air outlet pipe 63 and the air outlet chamber 612, which is beneficial to the timely discharge of gas in the air outlet chamber 612.

[0053] In some embodiments of this application, the intake pipe 62 and the exhaust pipe 63 are integrally formed, and the partition 613 extends outward to form a partition protrusion 6131 for separating the intake pipe 62 and the exhaust pipe 63. The intake pipe 62 and the exhaust pipe 63 are coaxially arranged. By making the intake pipe 62 and the exhaust pipe 63 integrally formed, it is beneficial to increase the structural strength and reduce the manufacturing difficulty; preferably, the housing 61, the intake pipe 62 and the exhaust pipe 63 are integrally injection molded.

[0054] In some embodiments of this application, perforated plates 615 are provided at both ends of the air intake chamber 61. The perforated plates 615 have a number of regularly arranged holes, and a number of humidification pipes 64 pass through the holes. By providing the perforated plates 615, support is formed for the humidification pipes 64.

[0055] In some embodiments of this application, the intake chamber 611 is provided with an intake cavity 616 and an outlet cavity 617 at both ends. A perforated plate 615 is disposed between the intake cavity 616 and the intake chamber 611, and another perforated plate 615 is disposed between the outlet cavity 617 and the intake chamber 611. The intake cavity 616 and the outlet cavity 617 are respectively provided with an intake nozzle 6161 and an outlet nozzle 6171. The intake cavity 616 and the outlet cavity 617 are part of the humidification pipeline 64. Oxygen enters the intake cavity 616 through the intake nozzle 6161, then passes through the water-permeable structure in the intake chamber 611, and then reaches the outlet cavity 617; humidification of oxygen is achieved in the intake chamber 611. Example

[0056] See Figures 6-7 This is the second embodiment of the waterless humidification module proposed in this utility model. The main difference between this embodiment and the first embodiment is the different air intake chamber structure. Other aspects can be the same as the first embodiment.

[0057] A waterless humidification module 60 includes a housing 61, an inlet pipe 62, an outlet pipe 63, and a humidification pipeline. The housing 61 contains an inlet chamber 611 and an outlet chamber 612. The inlet pipe 62 and the outlet pipe 63 are respectively located on the inlet chamber 611 and the outlet chamber 612, and are situated at the same end of the housing 61. Conventional waterless humidification modules, due to the bidirectional symmetrical structure of the compressor and oxygen circuits, require separate connections at both ends during pipeline connection, resulting in spatial complexity and inconvenience in pipeline connection. This application addresses this by placing the inlet pipe 62 and the outlet pipe 63 on the same side of the housing 61, facilitating rapid connection between the inlet pipe 62 and the compressor inlet pipeline, reducing internal space occupation, and thus making the structure more compact and simplified.

[0058] In this embodiment, at least a portion of the humidification pipeline passes through the air intake chamber 611, and all or part of the pipe wall of the humidification pipeline located within the air intake chamber is a water-permeable structure. The water-permeable structure allows moisture to enter the interior through the pipe wall, thereby humidifying the oxygen within the humidification pipeline 64. Simultaneously, the air intake pipe 62 is used to introduce outside air into the air intake chamber 611, and some moisture in the air permeates into the humidification pipeline, thus humidifying the oxygen within the humidification pipeline.

[0059] In some embodiments of this application, an air inlet chamber 616 and an air outlet chamber 617 are provided within the housing 61, and an air inlet nozzle 6161 and an air outlet nozzle 6171 are respectively provided on the air inlet chamber 616 and the air outlet chamber 617. The air inlet chamber 616 and the air outlet chamber 617 are part of a humidification pipeline. Oxygen enters the air inlet chamber 616 through the air inlet nozzle 6161, and then passes through the water-permeable structure in the air inlet chamber 611 before reaching the air outlet chamber 617; within the air inlet chamber 611, the oxygen is humidified.

[0060] In some embodiments of this application, in order to facilitate the connection of the air inlet 6161 and the air outlet 6171 to the oxygen supply pipeline and reduce the space occupied inside the oxygen generator, it is preferable that the air inlet 6161 and the air outlet 6171 are located at the same end of the housing 61, the air inlet 6161 and the air outlet 6171 are located at one end of the housing 61, and the air inlet pipe 62 and the air outlet pipe 63 are located at the other end of the housing 61, so as to facilitate the quick connection of the oxygen generation and supply pipeline and the oxygen supply pipeline.

[0061] In some embodiments of this application, the air outlet chamber 616 extends above the air inlet chamber 611, and the air outlet 6171 is disposed away from the air inlet pipe 62; the air outlet 6171 is disposed close to the air inlet 6161.

[0062] In some embodiments of this application, the air inlet 6171 may also be positioned close to the air inlet pipe 62. Example

[0063] See Figure 8 As shown, an oxygen generator 100 with the aforementioned waterless humidification module 60 permeates moisture from the outside air into the oxygen to increase the humidity of the oxygen, while simultaneously dehumidifying the outside air.

[0064] An oxygen concentrator 100 includes a housing 10, an output pipeline for discharging oxygen, and the aforementioned anhydrous humidification module 60. A humidification pipeline 64 is connected to the output pipeline for humidifying the output oxygen. The oxygen concentrator 100 has an inlet pipeline, and outlet pipes 62 and 63 are connected to the inlet pipeline. The outlet pipe 63 connects to the inlet of a compressor, delivering the dehumidified gas to the compressor for compression. Preferably, the anhydrous humidification module 60 is independently configured.

[0065] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art 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 claimed by this utility model.

Claims

1. A waterless humidification module, characterized in that, include: The casing contains an air inlet chamber and an air outlet chamber. An air inlet pipe and an air outlet pipe are respectively provided on the air inlet chamber and the air outlet chamber, and are located at the same end of the housing; The humidification pipeline passes through the air intake chamber in at least a portion, and all or part of the pipe wall of the humidification pipeline located in the air intake chamber is a water-permeable structure. A partition is disposed inside the housing to separate the air inlet chamber and the air outlet chamber, and the partition has a through opening for connecting the air inlet chamber and the air outlet chamber.

2. The anhydrous humidification module according to claim 1, characterized in that, The air inlet pipe and the air outlet pipe are coaxially arranged and located on the side of the housing, and the air inlet and the air outlet pipe are respectively provided with an air inlet and an air outlet at the connection between the air inlet pipe and the air inlet chamber and at the connection between the air outlet pipe and the air outlet chamber.

3. The anhydrous humidification module according to claim 2, characterized in that, The through-hole and the air inlet pipe are located at both ends of the housing.

4. The anhydrous humidification module according to claim 1, characterized in that, The cross-sectional area of ​​the air inlet chamber is larger than that of the air outlet chamber.

5. The anhydrous humidification module according to claim 1, characterized in that, The air outlet chamber is filled with sound-absorbing cotton and / or filter cotton, and the water-permeable structure is a fiber membrane.

6. The anhydrous humidification module according to claim 1, characterized in that, The gas flow direction in the humidification pipeline is opposite to the gas flow direction in the air intake chamber.

7. The anhydrous humidification module according to any one of claims 1 to 6, characterized in that, Both ends of the air intake chamber are provided with perforated plates, and the perforated plates have a number of regularly arranged holes, through which a number of the humidification pipes pass.

8. The anhydrous humidification module according to claim 7, characterized in that, The air inlet chamber has an air inlet cavity and an air outlet cavity at both ends. The perforated plate is located between the air inlet cavity and the air inlet chamber, and between the air outlet cavity and the air inlet chamber. The air inlet cavity and the air outlet cavity are respectively provided with an air inlet nozzle and an air outlet nozzle.

9. The anhydrous humidification module according to claim 8, characterized in that, The air intake chamber extends above the air intake cavity, and the air intake nozzle is located close to the air intake pipe; or, the air outlet chamber extends above the air intake cavity, and the air outlet nozzle is located away from the air intake pipe.

10. An oxygen generator, characterized in that, The device includes the anhydrous humidification module as described in any one of claims 1-9, wherein the air inlet pipe and the air outlet pipe are connected to the air inlet pipe of the oxygen generator, and the humidification pipe is connected to the oxygen delivery pipe of the oxygen generator.

Citation Information

Patent Citations

  • Humidifying device and oxygen concentrating system

    CN100542623C