Portable oxygen generator

Abstract

The embodiment of the utility model provides a portable oxygen generator, the portable oxygen generator comprises an oxygen generation part and a compressor, the oxygen generation part comprises: a first molecular sieve cylinder having a first upper opening and a first lower opening; the second molecular sieve cylinder sleeves the outer side of the first molecular sieve cylinder and is provided with a second upper opening and a second lower opening; the upper end cover is arranged on the axial upper sides of the first molecular sieve cylinder and the second molecular sieve cylinder and is provided with an oxygen outlet channel, a blowback channel and a pressure equalizing channel which are communicated with the first upper opening and the second upper opening, and the oxygen outlet channel, the blowback channel and the pressure equalizing channel are arranged in the upper end cover in a layered manner; and the lower end cover is arranged on the axial lower sides of the first molecular sieve cylinder and the second molecular sieve cylinder, and is provided with an air inlet channel and an exhaust channel which are communicated with the first lower opening and the second lower opening. Therefore, the double molecular sieve cylinders are sleeved inside and outside and the two end covers are used for realizing the connection of all the gas paths, so that the volume of the oxygen generation part is reduced, and all the gas paths can be quickly and conveniently connected.

Description

Technical Field

[0001] The present application relates to the technical field of oxygen production, and in particular to a portable oxygen generator. Background Art

[0002] Oxygen inhalation can not only relieve the patient's symptoms, but also help healthy people improve their physical functions.

[0003] Traditional oxygen concentrators have the advantages of stable oxygen flow and oxygen supply concentration, but are not easy to transport and carry. Usually people can only breathe oxygen indoors, and they cannot meet people's needs for oxygen breathing at any time when they go out.

[0004] In order to meet people's oxygen needs, portable oxygen concentrators have developed rapidly. Portable oxygen concentrators usually use the principle of pressure swing adsorption (PSA) to separate nitrogen and oxygen in the air in the oxygen concentrator chamber to obtain oxygen-rich gas, and then lead the oxygen-rich gas out of the oxygen concentrator chamber through a pipeline for people to use. It has the advantages of small size, light weight and easy to carry.

[0005] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solutions of the present application and for the convenience of understanding by those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art simply because they are described in the background technology section of the present application. Utility Model Content

[0006] The inventors found that in the existing portable oxygen concentrators, in order to continuously produce oxygen, the oxygen production chamber adopts a double molecular sieve cylinder for alternating oxygen production, which is placed in parallel and the gas path is connected by a pipeline. However, the double molecular sieve cylinders placed in parallel occupy a large space, which is not conducive to further miniaturization of the oxygen concentrator. In addition, the pipeline connection is relatively complicated and prone to connection errors, and the pipeline also occupies a large space.

[0007] In order to solve at least one of the above problems or other similar problems, an embodiment of the present application provides a portable oxygen concentrator to further improve the portability of the oxygen concentrator.

[0008] The portable oxygen concentrator of the embodiment of the present application includes an oxygen concentrator and a compressor connected to the oxygen concentrator, wherein the oxygen concentrator includes:

[0009] A first molecular sieve cartridge extending in the axial direction, wherein the axial upper side of the first molecular sieve cartridge has a first upper opening, and the axial lower side of the first molecular sieve cartridge has a first lower opening;

[0010] A second molecular sieve cartridge is sleeved on the radially outer side of the first molecular sieve cartridge and extends in the axial direction, wherein the axial upper side of the second molecular sieve cartridge has a second upper opening, and the axial lower side of the second molecular sieve cartridge has a second lower opening;

[0011] an upper end cover, which is arranged on the axial upper side of the first molecular sieve cartridge and the second molecular sieve cartridge, and has an oxygen outlet channel connected to the first upper opening and the second upper opening, a backflush channel connected to the first upper opening and the second upper opening, and a pressure equalizing channel connected to the first upper opening and the second upper opening, wherein the oxygen outlet channel, the backflush channel, and the pressure equalizing channel are layeredly arranged in the upper end cover; and

[0012] The lower end cover is arranged on the axial lower side of the first molecular sieve cartridge and the second molecular sieve cartridge, and has an air inlet channel connected with the first lower opening and the second lower opening, and an exhaust channel connected with the first lower opening and the second lower opening.

[0013] In addition, optionally, the oxygen production unit also includes a first solenoid valve and a second solenoid valve arranged between the air intake channel and the exhaust channel, the first solenoid valve controls the connection and disconnection between the first lower opening and the air intake channel and the first lower opening and the exhaust channel, and the second solenoid valve controls the connection and disconnection between the second lower opening and the air intake channel and the second lower opening and the exhaust channel.

[0014] In addition, optionally, the air inlet passage and the exhaust passage extend along the circumferential direction of the lower end cover and are arranged opposite to each other in the radial direction of the lower end cover.

[0015] In addition, optionally, the backflush channel has a thin-diameter portion, and an inner diameter of the thin-diameter portion is smaller than an inner diameter of other portions of the backflush channel.

[0016] In addition, optionally, a pressure equalizing valve is provided in the pressure equalizing channel, and the pressure equalizing valve controls the on-off of the pressure equalizing channel.

[0017] In addition, optionally, the portable oxygen concentrator further includes an oxygen storage portion connected to the oxygen outlet channel, and an end portion of the oxygen outlet channel connected to the oxygen storage portion is provided with a one-way valve for allowing air flow to flow toward the oxygen storage portion.

[0018] In addition, optionally, the one-way valve includes a reed fixed at an end of the oxygen outlet passage.

[0019] In addition, optionally, a sound-absorbing hole is provided on the radially outer side wall or the bottom of the exhaust passage.

[0020] In addition, optionally, the exhaust passage is also filled with sound-absorbing cotton.

[0021] In addition, optionally, the portable oxygen concentrator also includes a control circuit component, a breathing sensor and a control valve. The oxygen storage part is connected to the oxygen supply nozzle of the portable oxygen concentrator through the breathing sensor and the control valve to form an oxygen supply circuit. The breathing sensor detects the user's breathing state, and the control valve controls the on-off of the oxygen supply circuit according to the detection result of the breathing sensor.

[0022] In addition, optionally, the portable oxygen concentrator further includes a control circuit component, and the control circuit component controls the on and off of the first solenoid valve and the second solenoid valve.

[0023] In addition, optionally, the portable oxygen concentrator further includes a control circuit component, and the control circuit component controls the on and off of the pressure equalizing valve.

[0024] One of the beneficial effects of the embodiments of the present application is that the volume of the oxygen generator is reduced by arranging the double molecular sieve cylinder inside and outside, and the connection of various gas circuits is achieved through two end covers, which further reduces the volume of the oxygen generator and enables quick and convenient connection of various gas circuits.

[0025] With reference to the following description and accompanying drawings, the specific embodiments of the present application are disclosed in detail, indicating the way in which the principles of the present application can be adopted. It should be understood that the embodiments of the present application are not limited in scope. Within the scope of the terms of the appended claims, the embodiments of the present application include many changes, modifications and equivalents.

[0026] Features described and / or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0027] It should be emphasized that the term “include / comprises” when used herein refers to the presence of features, integers, steps or components, but does not exclude the presence or addition of one or more other features, integers, steps or components. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The elements and features described in one figure or one implementation of the present application embodiment may be combined with the elements and features shown in one or more other figures or implementations. In addition, in the accompanying drawings, similar reference numerals represent corresponding parts in several figures and can be used to indicate corresponding parts used in more than one implementation.

[0029] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] In the attached picture:

[0031] Figure 1 is a cross-sectional view along the axial direction of the portable oxygen concentrator according to an embodiment of the present application;

[0032] Figure 2 is a three-dimensional diagram of the oxygen production unit of the portable oxygen concentrator according to an embodiment of the present application;

[0033] Figure 3 is along Figure 2 A cross-sectional view in the AA direction shown;

[0034] Figure 4 is along Figure 2 A cross-sectional view in the BB direction is shown;

[0035] Figure 5 is a schematic diagram of a cross section perpendicular to the axial direction of the upper end cover of the portable oxygen concentrator according to an embodiment of the present application;

[0036] Figure 6 is a perspective view of an upper end cover of a portable oxygen concentrator according to an embodiment of the present application observed from one direction;

[0037] Figure 7 is a top view of the lower end cover of the portable oxygen concentrator according to an embodiment of the present application;

[0038] Figure 8 is along Figure 7 A cross-sectional view in the CC direction shown;

[0039] Fig. 9 is a schematic diagram of a cross section perpendicular to the axial direction of the lower end cover of the portable oxygen concentrator according to an embodiment of the present application;

[0040] Fig.10 is a schematic diagram for explaining the air intake process of the portable oxygen concentrator of the embodiment of the present application;

[0041] Fig.11 is a schematic diagram for explaining the exhaust process of the portable oxygen concentrator of the embodiment of the present application;

[0042] Fig.12 is a cross-sectional view along the axial direction of the oxygen generator of the portable oxygen concentrator according to the embodiment of the present application;

[0043] Fig.13 is a schematic diagram for explaining the oxygen storage and backflushing process of the portable oxygen concentrator of an embodiment of the present application;

[0044] Fig.14 is a schematic diagram for explaining the pressure equalization process of the portable oxygen concentrator of the embodiment of the present application;

[0045] Fig.15 It is a schematic diagram of the gas circuit principle of the portable oxygen concentrator of the embodiment of the present application.

[0046] Tag Name

[0047] 1: Portable oxygen concentrator;

[0048] 10: Oxygen production unit;

[0049] 101: oxygen supply nozzle;

[0050] 110: first molecular sieve cartridge;

[0051] 110b: first opening;

[0052] 120: second molecular sieve cartridge;

[0053] 130: upper end cover;

[0054] 130a: oxygen outlet channel;

[0055] 130b: backflush channel;

[0056] 130c: pressure equalization channel;

[0057] 131: hole;

[0058] 132: thin diameter part;

[0059] 140: lower end cover;

[0060] 140a: air intake passage;

[0061] 140b: exhaust passage;

[0062] 141: Air inlet;

[0063] 142: first mounting portion;

[0064] 143: second mounting portion;

[0065] 144: inner tube channel;

[0066] 145: outer cylinder channel;

[0067] 146: muffler hole;

[0068] 147: Silencer;

[0069] 150: first solenoid valve;

[0070] 151: First channel;

[0071] 152: Second channel;

[0072] 153: Third channel;

[0073] 160: second solenoid valve;

[0074] 170: pressure equalizing valve;

[0075] 171: flow limiting hole;

[0076] 180: one-way valve;

[0077] 181: fixed parts;

[0078] 182: reed;

[0079] 190: Circuit components;

[0080] 20: compressor;

[0081] 30: oxygen storage unit;

[0082] OO: Central axis. DETAILED DESCRIPTION

[0083] With reference to the accompanying drawings, the above and other features of the present application will become apparent through the following description. In the specification and the accompanying drawings, specific embodiments of the present application are specifically disclosed, which show some embodiments in which the principles of the present application can be adopted. It should be understood that the present application is not limited to the described embodiments. On the contrary, the present application includes all modifications, variations and equivalents that fall within the scope of the attached claims.

[0084] In the embodiments of the present application, the terms "first", "second", etc. are used to distinguish different elements in terms of title, but do not indicate the spatial arrangement or temporal order of these elements, etc., and these elements should not be limited by these terms. The term "and / or" includes any one and all combinations of one or more of the associated listed terms. The terms "comprising", "including", "having", etc. refer to the presence of the stated features, elements, components or components, but do not exclude the presence or addition of one or more other features, elements, components or components.

[0085] In the embodiments of the present application, the singular forms "a", "the", etc. may include plural forms and should be broadly understood as "a kind" or "a type" rather than being limited to the meaning of "one"; in addition, the term "said" should be understood to include both singular and plural forms, unless the context clearly indicates otherwise. In addition, the term "according to" should be understood as "at least in part according to...", and the term "based on" should be understood as "at least in part based on...", unless the context clearly indicates otherwise.

[0086] The embodiments of the present application will be described below with reference to the accompanying drawings.

[0087] The present application embodiment provides a portable oxygen concentrator. Figure 1 It is a cross-sectional view along the axial direction of the portable oxygen concentrator according to an embodiment of the present application.

[0088] like Figure 1 As shown, the portable oxygen concentrator 1 includes an oxygen concentrator 10 and a compressor 20 connected to the oxygen concentrator 10. The oxygen concentrator 10 may be an oxygen concentrator based on the pressure swing adsorption principle, and the compressor 20 may be an air compressor.

[0089] In addition, the compressor 20 can be placed longitudinally, that is, the axial direction of the motor, compression cylinder, etc. of the compressor 20 is parallel to the axial direction of the oxygen production unit 10, or the compressor 20 can be placed transversely, that is, the axial direction of the motor, compression cylinder, etc. of the compressor 20 is intersecting or perpendicular to the axial direction of the oxygen production unit 10. The embodiments of the present application do not limit the implementation of the compressor, and the relevant technology can be referred to for details.

[0090] In addition, the outer shell of the portable oxygen concentrator 1 can be of any shape, for example, the outer shell of the portable oxygen concentrator 1 can be cylindrical, and this embodiment of the present application does not limit this.

[0091] Figure 2 is a three-dimensional diagram of the oxygen generator of the portable oxygen concentrator according to the embodiment of the present application. Figure 3 is along Figure 2 A cross-sectional view in the AA direction is shown. Figure 4 is along Figure 2 A cross-sectional view along the BB direction is shown.

[0092] like Figure 3 and Figure 4As shown, the oxygen production section 10 includes a first molecular sieve cartridge 110, a second molecular sieve cartridge 120, an upper end cover 130 and a lower end cover 140. The first molecular sieve cartridge 110 and the second molecular sieve cartridge 120 extend axially, and the second molecular sieve cartridge 120 is sleeved on the radially outer side of the first molecular sieve cartridge 110. The upper end cover 130 is arranged on the axial upper side of the first molecular sieve cartridge 110 and the second molecular sieve cartridge 120, for example, the upper end cover 130 abuts against the axial upper ends of the first molecular sieve cartridge 110 and the second molecular sieve cartridge 120; the lower end cover 140 is arranged on the axial lower side of the first molecular sieve cartridge 110 and the second molecular sieve cartridge 120, for example, the lower end cover 140 abuts against the axial lower ends of the first molecular sieve cartridge 110 and the second molecular sieve cartridge 120. In addition, the parts of the upper end cover 130 and the lower end cover 140 that abut against the first molecular sieve cartridge 110 and the second molecular sieve cartridge 120 can be sealed, for example, by providing a sealing component or coating a sealing material, so as to improve the airtightness of the oxygen production unit 10. The embodiment of the present application does not limit the structure and material of the sealing component, which can be selected according to actual needs, and the relevant technology can be referred to for details.

[0093] In the embodiment of the present application, the direction along the central axis OO of the first molecular sieve cartridge 110 or the direction parallel to the central axis OO is referred to as the "axial direction", the radial direction centered on the central axis OO is referred to as the "radial direction", the direction radially away from the central axis OO is referred to as the "radial outer side", the direction radially close to the central axis OO is referred to as the "radial inner side", and the circumferential direction centered on the central axis OO is referred to as the "circumferential direction". In addition, for the convenience of explanation, Figure 2 The direction from bottom to top in the figure shown is called "up". Figure 2 The direction from top to bottom in the illustrated drawings is referred to as "bottom", the surface located above is referred to as the "upper surface", and the surface located below is referred to as the "lower surface". Those skilled in the art should understand that the "upper" and "lower" described in the embodiments of the present application are only used to distinguish different elements in terms of names, but do not represent the spatial arrangement of these elements.

[0094] like Figure 3 and Figure 4 As shown, the first molecular sieve cartridge 110 has a first upper opening 110a on the axial upper side, and a first lower opening 110b on the axial lower side; the second molecular sieve cartridge 120 has a second upper opening 120a on the axial upper side, and a second lower opening 120b on the axial lower side.

[0095] Figure 5 is a schematic diagram of a cross section perpendicular to the axial direction of the upper end cover of the portable oxygen concentrator according to an embodiment of the present application, Figure 6 is a perspective view of the upper end cover of the portable oxygen concentrator according to an embodiment of the present application viewed from one direction, Figure 7is a top view of the lower end cover of the portable oxygen concentrator according to an embodiment of the present application, Figure 8 is along Figure 7 A cross-sectional view along the CC direction is shown.

[0096] like Figure 5 and Figure 6 As shown, the upper end cover 130 has an oxygen outlet channel 130a. Figure 3 and Figure 4 As shown, the oxygen outlet channel 130a is connected to the first upper opening 110a and the second upper opening 120a. For example, a hole connected to the first upper opening 110a and the second upper opening 120a and a channel connected to the hole are formed in the upper end cover 130, thereby forming the oxygen outlet channel 130a, for example, Figure 5 and Figure 6 As shown, a circular hole and a cylindrical channel are formed in the upper end cover 130, but the embodiment of the present application is not limited thereto. The cross-sectional shape of the hole and the channel can be any shape, and the embodiment of the present application does not impose any limitation on this.

[0097] like Figure 7 and Figure 8 As shown, the lower end cover 140 has an air inlet passage 140a and an air outlet passage 140b. Figure 3 As shown, the intake passage 140a and the exhaust passage 140b are both connected to the first lower opening 110b and the second lower opening 120b. Figure 7 As shown, a hole communicating with the first lower opening 110b and a channel communicating with the hole, i.e., an inner tube channel 144, are formed in the lower end cover 140, so that the air intake channel 140a and the exhaust channel 140b are connected to the first lower opening 110b of the first molecular sieve cartridge 110; a hole communicating with the second lower opening 120b and a channel communicating with the hole, i.e., an outer tube channel 145, are formed in the lower end cover 140, so that the air intake channel 140a and the exhaust channel 140b are connected to the second lower opening 120b of the second molecular sieve cartridge 120. In addition, as Figure 7 and Figure 8 As shown, the holes and channels in the lower end cover 140 are circular holes and cylindrical channels, but the embodiments of the present application are not limited thereto. The cross-sectional shapes of the holes and channels can be any shapes, and the embodiments of the present application are not limited thereto.

[0098] Therefore, by arranging the double molecular sieve cylinder inside and outside, the volume of the oxygen generator is reduced, and the connection of various gas paths is achieved through two end covers, which further reduces the volume of the oxygen generator and enables quick and convenient connection of various gas paths.

[0099] In some embodiments, Figure 2As shown, the oxygen production unit 10 further includes a first solenoid valve 150 and a second solenoid valve 160. The first solenoid valve 150 and the second solenoid valve 160 are both arranged between the air intake channel 140a and the exhaust channel 140b. The first solenoid valve 150 controls the connection and disconnection between the first lower opening 110b and the air intake channel 140a, and the first lower opening 110b and the exhaust channel 140b. The second solenoid valve 160 controls the connection and disconnection between the second lower opening 120b and the air intake channel 140a, and the second lower opening 120b and the exhaust channel 140b.

[0100] Fig. 9 is a schematic diagram of a cross section perpendicular to the axial direction of the lower end cover of the portable oxygen concentrator according to an embodiment of the present application, Fig.10 is a schematic diagram for explaining the air intake process of the portable oxygen concentrator of the embodiment of the present application. Fig.11 This is a schematic diagram for explaining the exhaust process of the portable oxygen concentrator of the embodiment of the present application. Figures 9 to 11 The structure of the lower end cover of the portable oxygen concentrator according to the embodiment of the present application is further described.

[0101] like Fig. 9 As shown, a first mounting portion 142 and a second mounting portion 143 are formed between the air inlet passage 140a and the air outlet passage 140b of the lower end cover 140, and the first mounting portion 142 and the second mounting portion 143 are used to mount the first solenoid valve 150 and the second solenoid valve 160 respectively ( Fig. 9 Not marked in the table). Fig. 9 As shown by the dotted arrow in FIG. 1 , the air inlet 141 of the lower end cover 140 is connected to the outlet of the compressed air of the compressor 20. The compressed air enters the air inlet channel 140a of the lower end cover 140 along the air inlet 141, and then reaches the first solenoid valve 150 and the second solenoid valve 160 installed in the first mounting portion 142 and the second mounting portion 143, and then enters the first molecular sieve cartridge 110 and the second molecular sieve cartridge 120 ( Fig. 9 In addition, the gas discharged from the first molecular sieve cartridge 110 and the second molecular sieve cartridge 120 reaches the first solenoid valve 150 and the second solenoid valve 160, and then enters the exhaust channel 140b. Through the control of the first solenoid valve 150 and the second solenoid valve 160, the intake and exhaust of the first molecular sieve cartridge 110 and the second molecular sieve cartridge 120 can be achieved.

[0102] like Fig.10 and Fig.11As shown, three channels are provided in the first solenoid valve 150, namely the first channel 151, the second channel 152 and the third channel 153. The first channel 151 is connected to the intake channel 140a of the lower end cover 140, the second channel 152 is connected to the inner cylinder channel 144 of the lower end cover 140, and the third channel 153 is connected to the exhaust channel 140b of the lower end cover 140. The first solenoid valve 150 can control the second channel 152 to be connected to one of the first channel 151 and the third channel 153 and not to be connected to the other channel.

[0103] When pressurizing the intake air, Fig.10 As shown, the first solenoid valve 150 controls the second channel 152 to be connected to the first channel 151 and not to be connected to the third channel 153, and the gas (such as compressed air) flows along Fig.10 The dotted arrow shown in the figure enters the inlet channel 140 a from the inlet port 141 , then enters the second channel 152 through the first channel 151 , and then enters the inner cylinder channel 144 , thereby reaching the first molecular sieve cylinder 110 .

[0104] When decompressing and exhausting, Fig.11 As shown, the first solenoid valve 150 controls the second channel 152 to be connected to the third channel 153 and not to be connected to the first channel 151, and the gas (for example, nitrogen-rich gas) flows along Fig.11 As shown by the dotted arrow in FIG. 1 , the first molecular sieve cartridge 110 is discharged from the inner cartridge channel 144 , and then enters the third channel 153 through the second channel 152 , and then enters the exhaust channel 140 b .

[0105] The above description is made using the first solenoid valve 150 as an example. The structure of the second solenoid valve 160 is the same as that of the first solenoid valve 150, and the switching principle is also the same. The difference is that the first solenoid valve 150 controls the pressurized air intake and the reduced pressure exhaust of the first molecular sieve cartridge, and the second solenoid valve 160 controls the pressurized air intake and the reduced pressure exhaust of the second molecular sieve cartridge. In some embodiments, the number of air intake channels of the first molecular sieve cartridge and the number of air intake channels of the second molecular sieve cartridge may be the same or different, and the pressurization time and the decompression time of the two solenoid valves may be the same or different, which will not be described one by one here.

[0106] In some embodiments, Figure 7 As shown, the air inlet passage 140a and the air outlet passage 140b extend along the circumferential direction of the lower end cover 140 and are arranged opposite to each other in the radial direction of the lower end cover 140. Thus, the structure of the oxygen generator is further compacted and the volume of the oxygen generator is reduced.

[0107] In some embodiments, Figure 5 and Figure 6As shown, the upper end cover 130 also has a backflush channel 130b and a pressure equalizing channel 130c, and the backflush channel 130b and the pressure equalizing channel 130c are both connected to the first upper opening 110a and the second upper opening 120a. Figure 6 As shown, the oxygen outlet channel 130 a , the backflush channel 130 b and the pressure equalization channel 130 c are arranged in layers in the upper end cover 130 .

[0108] Fig.12 is a cross-sectional view of the oxygen generator of the portable oxygen generator according to an embodiment of the present application along the axial direction. Fig.13 is a schematic diagram for explaining the oxygen storage and backflush process of the portable oxygen concentrator of the embodiment of the present application. Fig.14 This is a schematic diagram for explaining the pressure equalization process of the portable oxygen concentrator in the embodiment of the present application. Figure 12 to Figure 14 The structure of the upper end cover of the portable oxygen concentrator according to the embodiment of the present application is further described.

[0109] Taking the second molecular sieve cartridge 120 for oxygen production as an example, Figure 12 to Figure 14 The dotted arrows in the figure indicate the direction of the gas. Fig.12 As shown, after the compressed gas enters the second molecular sieve cylinder 120, oxygen-rich gas is generated in the second molecular sieve cylinder 120. The oxygen-rich gas passes through the upper end cover 130 and the second upper opening 120a ( Fig.12 The hole 131 connected to the upper end cover 130 is not marked in the figure. Fig.13 As shown, a portion of the oxygen-rich gas enters the oxygen storage portion 30 through the oxygen outlet channel 130a, and a portion of the oxygen-rich gas is back-flushed to the first molecular sieve cartridge 110 through the back-flushing channel 130b. Fig.14 As shown, a portion of the oxygen-rich gas also enters the pressure equalization channel 130c.

[0110] Combine the following Figure 12 to Figure 14 The oxygen storage process, backflushing process and pressure equalization process are explained respectively.

[0111] like Fig.12 As shown, the oxygen-rich gas prepared in the second molecular sieve cartridge 120 enters the oxygen outlet channel 130a through the hole 131, as shown in FIG. Fig.13 As shown, the oxygen-rich gas flows along the oxygen outlet channel 130a to the oxygen storage section 30 connected to the oxygen outlet channel 130a. The end of the oxygen outlet channel 130a connected to the oxygen storage section 30 is provided with a one-way valve 180. The one-way valve 180 is a valve body that allows the gas to flow in one direction, that is, the one-way valve 180 allows the oxygen-rich gas to flow only from the oxygen outlet channel 130a side to the oxygen storage section 30 side, and prevents the gas in the oxygen storage section 30 from flowing to the oxygen outlet channel 130a side. In addition, the one-way valve 180 can be implemented by a reed that can be elastically deformed, for example, as Figure 4As shown, the elastic reed 182 can be fixed to the upper end cover 130 by a fixing member 181, so that the reed 182 can only move from the upper end cover 130 to the oxygen storage portion 30 ( Figure 4 The airflow can be unidirectionally flowed, thereby achieving the storage of oxygen-rich gas.

[0112] like Fig.13 As shown, the oxygen outlet channel 130a is also connected to the backflush channel 130b, and a small amount of oxygen-rich gas enters the first molecular sieve cylinder 110 along the backflush channel 130b, and the nitrogen-rich gas in the first molecular sieve cylinder 110 is blown out of the cylinder by the oxygen-rich gas, thereby increasing the oxygen content of the gas in the first molecular sieve cylinder 110, so as to increase the oxygen content in the oxygen-rich gas prepared by the first molecular sieve cylinder 110 during the next oxygen production. Figure 4 As shown, the backflush channel 130b has a small diameter portion 132, the inner diameter of which is smaller than the inner diameter of other parts of the backflush channel 130b, and the amount of oxygen-rich gas for backflush is limited by the small diameter portion 132 to avoid oxygen waste, thereby achieving backflush of the molecular sieve cartridge.

[0113] like Fig.14 As shown, a portion of the oxygen-rich gas flows into the pressure equalizing channel 130c, one end of the pressure equalizing channel 130c is connected to the first molecular sieve cartridge 110, and the other end of the pressure equalizing channel 130c is connected to the second molecular sieve cartridge 120. A pressure equalizing valve 170 is provided in the pressure equalizing channel 130c. The pressure equalizing valve 170 is, for example, a one-way valve, which is used to control the on-off of the pressure equalizing channel 130c. That is, when the pressure equalizing valve 170 is opened, the first molecular sieve cartridge 110 is connected to the second molecular sieve cartridge 120, and the gas pressure in the two molecular sieve cartridges reaches equilibrium. When the pressure equalizing valve 170 is closed, the first molecular sieve cartridge 110 is not connected to the second molecular sieve cartridge 120. Thus, the pressure equalization between the molecular sieve cartridges can be achieved by controlling the pressure equalizing valve 170.

[0114] The various gas paths of the embodiment of the present application are described above by taking the oxygen production process of the second molecular sieve cartridge 120 as an example. The oxygen production process of the first molecular sieve cartridge 110 is similar to that of the second molecular sieve cartridge 120 and will not be described one by one here.

[0115] Fig.15 It is a schematic diagram of the gas circuit principle of the portable oxygen concentrator of the embodiment of the present application.

[0116] In some embodiments, Fig.15 As shown, the portable oxygen concentrator 1 ( Fig.15 The control circuit assembly 190 (not shown) may also include a control circuit assembly 190, through which the first solenoid valve 150, the second solenoid valve 160, the pressure equalizing valve 170, etc. are controlled.

[0117] Combine the following Fig.15 The working process of the portable oxygen concentrator according to the embodiment of the present application is described.

[0118] The first molecular sieve cartridge 110 and the second molecular sieve cartridge 120 of the embodiment of the present application generate oxygen in rotation, assuming that the first molecular sieve cartridge 110 generates oxygen first.

[0119] like Fig.15 As shown, the control circuit component 190 controls the first solenoid valve 150 to allow the compressed air delivered by the compressor 20 to enter the first molecular sieve cylinder 110 through the air inlet channel 140a and the inner cylinder channel 144, and controls the second solenoid valve 160 to allow the gas in the second molecular sieve cylinder 120 to be discharged from the outer cylinder channel 145 via the exhaust channel 140b. After the gas in the first molecular sieve cylinder 110 reaches a predetermined threshold, the nitrogen is adsorbed by the molecular sieve, and the oxygen-rich gas is output from the first molecular sieve cylinder 110 along the oxygen outlet channel 130a. Most of the oxygen-rich gas is delivered to the oxygen storage part 30 through the oxygen outlet channel 130a; a smaller portion of the oxygen-rich gas is backblown to the second molecular sieve cylinder 120 through the backblowing channel 130b, and this portion of the oxygen-rich gas is used to blow the nitrogen-rich gas in the second molecular sieve cylinder 120 out of the cylinder.

[0120] After the first molecular sieve cartridge 110 is pressurized for a predetermined time (i.e., a predetermined pressurization time), that is, the pressurization of the first molecular sieve cartridge 110 is completed, the control circuit assembly 190 controls the pressure equalizing valve 170 to open, so that the pressure equalizing channel 130c is opened, and the first molecular sieve cartridge 110 is connected to the second molecular sieve cartridge 120. Since the first molecular sieve cartridge 110 is pressurized, the air pressure inside the first molecular sieve cartridge 110 is greater than the air pressure inside the second molecular sieve cartridge 120. Therefore, when the pressure equalizing channel 130c is opened, the air pressure inside the second molecular sieve cartridge 120 is pressurized by the high-pressure gas (nitrogen-rich gas) in the first molecular sieve cartridge 110, and the air pressure of the two molecular sieve cartridges reaches equilibrium, that is, the second molecular sieve cartridge 120 is pressurized by the first molecular sieve cartridge 110, thereby shortening the time for pressurizing the second molecular sieve cartridge 120. In this way, the oxygen production of the first molecular sieve cartridge 110 is completed.

[0121] Next, oxygen is produced by the second molecular sieve cylinder 120, and the control circuit component 190 controls the pressure equalizing valve 170 to open for a predetermined time (i.e., a predetermined pressure equalizing time) and then closes the pressure equalizing valve 170, and then controls the first solenoid valve 150 to discharge the gas in the first molecular sieve cylinder 110 from the inner cylinder channel 144 via the exhaust channel 140b, and the control circuit component 190 controls the second solenoid valve 160 to allow the compressed air delivered by the compressor 20 to enter the second molecular sieve cylinder 120 through the intake channel 140a and the outer cylinder channel 145. After the gas in the second molecular sieve cylinder 120 reaches a predetermined threshold value, the nitrogen is adsorbed by the molecular sieve, and the oxygen-rich gas is output from the second molecular sieve cylinder 120 along the oxygen outlet channel 130a, and a part of the oxygen-rich gas is backblown to the first molecular sieve cylinder 110 through the backblowing channel 130b, and the nitrogen-rich gas in the first molecular sieve cylinder 110 is blown out of the cylinder by the oxygen-rich gas.

[0122] After the second molecular sieve cartridge 120 is pressurized, the control circuit assembly 190 controls the pressure equalizing valve 170 to open, so that the pressure equalizing channel 130c is opened, the first molecular sieve cartridge 110 and the second molecular sieve cartridge 120 are connected, and the air pressure in the second molecular sieve cartridge 120 is higher than the air pressure in the first molecular sieve cartridge 110. After the pressure equalizing channel 130c is opened, the first molecular sieve cartridge 110 is pressurized by the second molecular sieve cartridge 120, thereby shortening the time for the next pressurization of the first molecular sieve cartridge 110. In this way, the oxygen production of the second molecular sieve cartridge 120 is completed.

[0123] By repeating the above operation, the first molecular sieve cartridge 110 and the second molecular sieve cartridge 120 can alternately produce oxygen, thereby achieving continuous oxygen output from the portable oxygen generator 1 .

[0124] In the embodiments of the present application, Fig.15 As shown, a flow limiting hole 171 can also be provided in the pressure equalizing valve 170, and the aperture of the flow limiting hole 171 has a predetermined relationship with the pressure equalizing time and the oxygen concentration in the molecular sieve cylinder. In addition, the inner diameter of the thin-diameter portion 132 in the backflush channel 130b also has a predetermined relationship with the pressurization time, the pressure equalizing time, the oxygen concentration, the flow rate, and the size of the molecular sieve cylinder. The above-mentioned predetermined relationship can be set by the user through experience, or it can be determined by experimental methods such as the control variable method. The specific implementation method can refer to the relevant technology, and the embodiment of the present application does not limit this.

[0125] In some embodiments, the portable oxygen concentrator 1 may further include a respiratory sensor and a corresponding control valve. The oxygen storage unit 30 communicates with the oxygen supply nozzle 101 (eg, Figure 1The oxygen storage unit 30 is connected to the oxygen supply nozzle 101 to form an oxygen supply circuit. For example, the user directly obtains the oxygen stored in the oxygen storage unit 30 from the oxygen supply nozzle 101 or through a nasal oxygen tube. The breathing sensor can be used to detect the breathing state of the user. The control circuit component 190 can control the control valve according to the detection result of the breathing sensor to control the on-off of the oxygen supply circuit. For example, if the breathing sensor detects the user's breathing, the control valve opens the oxygen supply circuit, and the oxygen in the oxygen storage unit 30 can be delivered to the oxygen supply nozzle 101 for the user to use; if the breathing sensor does not detect the user's breathing, the control valve closes the oxygen supply circuit to avoid oxygen waste.

[0126] In addition, the portable oxygen concentrator 1 may also include an oxygen concentration sensor for monitoring the oxygen concentration and flow rate in the oxygen supply circuit. The control circuit component 190 may display the oxygen concentration and / or flow rate monitored by the oxygen concentration sensor on a display screen, so that the user can know the oxygen concentration and flow rate. In addition, the control circuit component 190 may also control the control valve provided in the oxygen supply circuit according to the monitoring result to control the on-off or flow rate of the oxygen supply circuit. For example, when the flow rate is lower than a predetermined threshold value, the control circuit component 190 switches the control valve to off, thereby stopping the oxygen supply.

[0127] In some embodiments, a muffler hole may be provided in the exhaust passage 140b to reduce the noise during exhaust. Fig. 9 As shown, the silencer hole 146 can be arranged on the radially outer side wall of the exhaust passage 140b; in addition, the silencer hole 146 can also be at the bottom of the exhaust passage 140b. In addition, silencer cotton can be filled in the exhaust passage 140b to further reduce the noise during exhaust. Fig.15 As shown, a muffler 147 may also be provided inside or outside the exhaust passage 140b, but this embodiment of the present application does not limit this.

[0128] In addition, the portable oxygen concentrator of the embodiment of the present application may also include other components, for example, it may also include a nasal oxygen tube, etc., and can be designed according to actual needs, and the embodiment of the present application does not limit this.

[0129] According to the portable oxygen concentrator of the embodiment of the present application, the volume of the oxygen concentrator is reduced by arranging the double molecular sieve cylinder inside and outside, and the connection of each gas path is achieved through two end covers, which further reduces the volume of the oxygen concentrator and enables quick and convenient connection of each gas path.

[0130] It is worth noting that the above only describes the components or modules related to the present application, but the present application is not limited thereto. The portable oxygen concentrator of the embodiment of the present application may also include other components or modules, and the specific contents of these components or modules may refer to the relevant technology.

Claims

1. A portable oxygen concentrator, comprising an oxygen concentrator and a compressor connected to the oxygen concentrator, characterized in that: The oxygen production unit comprises: A first molecular sieve cartridge extending in the axial direction, wherein the axial upper side of the first molecular sieve cartridge has a first upper opening, and the axial lower side of the first molecular sieve cartridge has a first lower opening; A second molecular sieve cartridge is sleeved on the radially outer side of the first molecular sieve cartridge and extends in the axial direction, wherein the axial upper side of the second molecular sieve cartridge has a second upper opening, and the axial lower side of the second molecular sieve cartridge has a second lower opening; an upper end cover, which is arranged on the axial upper side of the first molecular sieve cartridge and the second molecular sieve cartridge, and has an oxygen outlet channel connected to the first upper opening and the second upper opening, a backflush channel connected to the first upper opening and the second upper opening, and a pressure equalizing channel connected to the first upper opening and the second upper opening, wherein the oxygen outlet channel, the backflush channel, and the pressure equalizing channel are layeredly arranged in the upper end cover; and The lower end cover is arranged on the axial lower side of the first molecular sieve cartridge and the second molecular sieve cartridge, and has an air inlet channel connected with the first lower opening and the second lower opening, and an exhaust channel connected with the first lower opening and the second lower opening.

2. The portable oxygen concentrator according to claim 1, characterized in that: The oxygen production unit also includes a first solenoid valve and a second solenoid valve arranged between the air intake channel and the exhaust channel, the first solenoid valve controls the connection and disconnection between the first lower opening and the air intake channel and the first lower opening and the exhaust channel, and the second solenoid valve controls the connection and disconnection between the second lower opening and the air intake channel and the second lower opening and the exhaust channel.

3. The portable oxygen concentrator according to claim 1, characterized in that: The air inlet passage and the exhaust passage extend along the circumferential direction of the lower end cover and are arranged opposite to each other in the radial direction of the lower end cover.

4. The portable oxygen concentrator according to claim 1, characterized in that: The backflush passage has a narrow diameter portion, and an inner diameter of the narrow diameter portion is smaller than an inner diameter of other portions of the backflush passage.

5. The portable oxygen concentrator according to claim 1, characterized in that: A pressure equalizing valve is provided in the pressure equalizing channel, and the pressure equalizing valve controls the on-off of the pressure equalizing channel.

6. The portable oxygen concentrator according to claim 1, characterized in that: The portable oxygen concentrator further includes an oxygen storage portion communicated with the oxygen outlet channel, and an end portion of the oxygen outlet channel communicated with the oxygen storage portion is provided with a one-way valve for allowing air flow to flow toward the oxygen storage portion.

7. The portable oxygen concentrator according to claim 6, characterized in that: The one-way valve includes a reed fixed at the end of the oxygen outlet passage.

8. The portable oxygen concentrator according to claim 1, characterized in that: A sound-absorbing hole is provided on a radially outer side wall or a bottom of the exhaust passage.

9. The portable oxygen concentrator according to claim 8, characterized in that: The exhaust passage is also filled with sound-absorbing cotton.

10. The portable oxygen concentrator according to claim 6, characterized in that: The portable oxygen concentrator also includes a control circuit component, a breathing sensor and a control valve. The oxygen storage unit is connected to the oxygen supply nozzle of the portable oxygen concentrator through the breathing sensor and the control valve to form an oxygen supply circuit. The breathing sensor detects the user's breathing state, and the control valve controls the on-off of the oxygen supply circuit according to the detection result of the breathing sensor.

11. The portable oxygen concentrator according to claim 2, characterized in that: The portable oxygen concentrator further includes a control circuit component, which controls the on and off of the first solenoid valve and the second solenoid valve.

12. The portable oxygen concentrator according to claim 5, characterized in that: The portable oxygen concentrator further comprises a control circuit component, and the control circuit component controls the on-off of the pressure equalizing valve.

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