Integrated oxygen generator

Abstract

The utility model discloses an integrated oxygen generator which comprises a box body, the interior of the box body is divided into mutually independent chambers through partition plates, and a compressor, a drying device, a compressed air tank, a molecular sieve adsorption tower and a control unit are installed in the chambers respectively. The compressor, the drying equipment, the compressed air tank and the molecular sieve adsorption tower are connected together through preset pipelines among the chambers, so that directional conveying of gas is realized. The utility model aims to provide a modularized integrated deployment which integrates a plurality of oxygen production function units which are originally distributed in a scattered manner into a single box body. Field welding assembly is replaced by a factory preassembled pipeline to realize pipeline connection, the field installation workload is reduced, a two-stage buffer structure with a main gas storage tank and auxiliary surge tank mode formed by double compressed air tanks is adopted to stabilize the pressure fluctuation of gas, the problems of large occupied area and complex installation of traditional split equipment are solved, and the production efficiency is improved. The stability, the continuity, the energy efficiency and the economical efficiency of oxygen production are remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of oxygen making equipment, especially to an integrated oxygen generator. BACKGROUND

[0002] Traditional oxygen making systems are usually composed of air compressors, dryers, filters, air storage tanks, oxygen making main machines (based on molecular sieve adsorption method, PSA), oxygen storage tanks, and control cabinets, etc. These components work together to separate oxygen from air and provide high-purity oxygen for medical or other purposes. For example, the medical molecular sieve oxygen generator system disclosed in Chinese invention patent publication No. CN112919420A adopts a split design, with each component existing in the form of an independent device. On-site assembly and connection are required through pipe flanges, valves, and pipe fittings. Although this design has certain flexibility in terms of separate manufacturing and replacement, it also exposes many deficiencies in actual application. First, since the compressor, air storage tank, oxygen making main machine, and other functional units each occupy an independent space and must have sufficient maintenance access, the entire system occupies a large area. This makes it difficult for traditional oxygen making systems to be applied to scenarios with limited space, such as ship cabins and mobile medical vehicles. In these cramped spaces, every inch of land is valuable, and the split design obviously cannot meet this demand.

[0003] Second, the on-site installation process is complex and time-consuming. Installation involves multiple tedious procedures such as pipe welding, valve assembly, electrical wiring, etc., and the entire process can take several days. This is unacceptable for disaster relief or field hospitals that require quick response. In emergency situations, time is life, and a long installation process will undoubtedly delay critical treatment opportunities.

[0004] In addition, the split design requires more pipe nodes, and the arrangement and structure are complex. Complex pipe arrangement not only increases the overall complexity of the system but also easily causes pipe joint leakage or filter displacement failure due to external vibration, thereby reducing the stability and safety of the system. During movement or transportation, external vibration can affect pipe connections, leading to oxygen leakage or reduced filtration effect, which poses a serious challenge to the safety and reliability of medical equipment.

[0005] The dispersed layout also makes the equipment inspection path complex. Maintenance personnel need to walk back and forth between multiple different locations for regular inspection and maintenance. This not only increases the workload of maintenance but also increases production costs. Frequent inspection and maintenance not only consumes manpower and resources but also increases equipment downtime, further affecting the overall efficiency of the system.

[0006] Although the split oxygen generating system has the advantages of independent unit maintenance in some aspects, its large footprint, time-consuming installation, complex structure and vulnerability to vibration restrict its promotion and application in space-limited and emergency application scenarios

[0007] In summary, there is an urgent need for a more integrated design to reduce the footprint, simplify the installation process, and improve the overall stability and economy of the oxygen generating system. It can also be quickly deployed in emergency situations to ensure timely oxygen supply and meet the urgent needs of medical and other fields. Content of the utility model

[0008] The utility model aims at providing a highly integrated and integrated oxygen generating device with rapid deployment capability.

[0009] In order to achieve the above-mentioned purpose, the utility model adopts the following scheme: an integrated oxygen generator comprising:

[0010] The box is internally divided into air treatment warehouse, gas storage warehouse, oxygen generating warehouse and control warehouse by multiple partitions, and the pipeline connection between each chamber is realized through the pre-set through hole;

[0011] The air treatment unit is arranged in the air treatment warehouse and used for compressing and pretreating the ambient air;

[0012] The compressed air storage unit is arranged in the gas storage warehouse, and the compressed air storage unit comprises a first compressed air tank and a second compressed air tank, the first compressed air tank and the second compressed air tank form a double-stage cache structure in series, so that the compressed air from the air treatment unit flows through the first compressed air tank and the second compressed air tank in turn;

[0013] The oxygen generating unit is arranged in the oxygen generating warehouse, and the oxygen generating unit is used for separating oxygen from the pretreated air delivered through the second compressed air tank and outputting the separated oxygen to an external oxygen using device or an oxygen storage tank;

[0014] The control unit is arranged in the control warehouse and used for controlling the air treatment unit, the compressed air storage unit and the oxygen generating unit to realize the directional delivery of gas through the pre-set pipeline structure.

[0015] The above scheme integrates multiple functional units originally scattered in layout into a single box through modular integrated design, the box is divided into four independent compartments, i.e., an air treatment compartment, a gas storage compartment, an oxygen production compartment and a control compartment, and pipeline connection is achieved by replacing field welding assembly with pre-installed pipelines, thereby reducing field installation workload and eliminating leakage risk caused by vibration of traditional external pipelines, a double-stage buffer structure composed of a main gas tank and an auxiliary pressure stabilizing tank is adopted, directional delivery is realized by a control unit, pressure fluctuation of output gas is stably controlled, and influence of pressure fluctuation on molecular sieve adsorption efficiency is solved.

[0016] As a further aspect of the present application, the air treatment unit comprises:

[0017] A compressor, an air outlet end of which is connected with an air inlet of the first compressed air tank through a first pipeline;

[0018] A drying device, an air inlet of which is connected with an air outlet end of the first compressed air tank through a second pipeline, and an air outlet end of which is connected with an air inlet of the second compressed air tank through a third pipeline;

[0019] A filter device provided with a discharge valve B is arranged on the second pipeline and the third pipeline respectively, for removing impurities such as oil and dust.

[0020] As a preferred aspect of the present application, the filter device comprises a first filter connected in series on the second pipeline and a second filter connected in series on the third pipeline.

[0021] The above scheme optimizes the problem of molecular sieve poisoning failure caused by oil / water impurities in compressed air in the traditional system and the defect of incomplete single-stage filtration and purification, through the series buffer design of the compressor, the first compressed air tank, the drying device and the second compressed air tank, in combination with the two-stage filter configuration. The two-stage filter system can deeply remove oil mist and liquid pollutants, achieving a breakthrough in air purification level. The series buffer structure significantly reduces the operating load of the drying device through pressure buffering, effectively reduces the overall energy consumption of the system, and at the same time guarantees the stability of the air treatment process, thereby improving the reliability and operating efficiency of the oxygen production system from the root.

[0022] As a further aspect of the present application, the oxygen production unit comprises:

[0023] A molecular sieve adsorption tower A and a molecular sieve adsorption tower B arranged in parallel;

[0024] An electrically controlled switching valve group arranged at the air inlet end and the air outlet end of the molecular sieve adsorption tower A and the molecular sieve adsorption tower B respectively.

[0025] The gas outlet end of the second compressed air tank is connected with the input end of the electrically-controlled switch valve group of the molecular sieve adsorption tower A and the molecular sieve adsorption tower B through a fourth pipeline, and the gas outlet end of the electrically-controlled switch valve group of the molecular sieve adsorption tower A and the molecular sieve adsorption tower B is connected with an external oxygen equipment or an oxygen storage tank.

[0026] The above scheme adopts a cooperative design of double molecular sieve towers and an electrically-controlled switch valve group, which aims to solve the problem of oxygen supply interruption caused by shutdown regeneration in the traditional single-tower adsorption oxygen production process. Through this design, the double towers realize uninterrupted oxygen supply through alternating adsorption and regeneration processes, and the electrically-controlled switch valve group precisely controls the gas switching path. This scheme can realize continuous and stable oxygen supply, and the oxygen output flow fluctuation is significantly reduced. The electrically-controlled switch mechanism has higher control precision compared with the traditional pneumatic valve group, and effectively reduces energy consumption.

[0027] As a preferred embodiment of the utility model, the first compressed air tank and the second compressed air tank are both provided with a drain valve A at the bottom, which can automatically drain water regularly to reduce the humidity in the tank and prolong the service life of the compressed air tank.

[0028] As a preferred embodiment of the utility model, the control unit includes a human-computer interaction panel, which is integrated with a pressure monitoring module and an operating state indicating module. The signal output end of the human-computer interaction panel is electrically connected with the compressor, the drying device, the electrically-controlled switch valve group, and the drain valves A and B. This simplifies the operation process and automatically controls the start and stop of each unit, reducing the labor input during operation and maintenance.

[0029] As a preferred embodiment of the utility model, an intake branch pipe is connected to the gas inlet of the molecular sieve adsorption tower A and the molecular sieve adsorption tower B, respectively. The fourth pipeline gas outlet end is connected to the two intake branch pipes through a three-way connector. Nitrogen discharge ports are connected to the intake branch pipes of the molecular sieve adsorption tower A and the molecular sieve adsorption tower B through a three-way connector. Gas outlet branch pipes are provided at the gas outlet ends of the molecular sieve adsorption tower A and the molecular sieve adsorption tower B. The gas outlet ends of the two gas outlet branch pipes are connected to an oxygen delivery pipe through a three-way connector, which is connected to an external oxygen equipment or an oxygen storage tank. The electrically-controlled switch valve group includes a first electromagnetic valve provided at the two nitrogen discharge ports, a second electromagnetic valve connected to the two intake branch pipes, and a third electromagnetic valve connected to the two gas outlet branch pipes.

[0030] As a further aspect of the present application, a blow pipe is connected between the two gas outlet branch pipes, the blow pipe is located between the gas outlet end of the molecular sieve adsorption tower A and the molecular sieve adsorption tower B and the corresponding third electromagnetic valve, and a fourth electromagnetic valve is arranged on the blow pipe. When the adsorption tower is switched, nitrogen gas is left to pollute the oxygen, and the required molecular sieve adsorption tower is switched by the fourth electromagnetic valve, thereby reducing the performance decay of the molecular sieve.

[0031] As a preferred aspect of the present application, a removable access hole is arranged on the top of the box corresponding to the oxygen production bin, so that the molecular sieve filler in the molecular sieve adsorption tower can be conveniently maintained and replaced.

[0032] As a preferred aspect of the present application, an openable bin door is arranged on the side wall of the box corresponding to the air treatment bin, the gas storage bin, the oxygen production bin and the control bin.

[0033] In summary, the present application has the following advantages over the prior art: the present application adopts a highly integrated module design, and arranges the air treatment, gas storage, oxygen production and control function units in independent compartments in a single box, and completes the standardized pre-installation of the pipeline before delivery, completely cancels the cumbersome welding, valve assembly and electrical wiring process on site, thereby greatly reducing the overall land occupation area and significantly shortening the installation and deployment time. At the same time, the series double-stage buffer structure formed by the first compressed air tank and the second compressed air tank not only realizes effective buffering of air pressure fluctuations, reduces the operating load of the drying device, but also ensures the stability and reliability of the pretreated air entering the oxygen production unit. In addition, in view of the problem that the traditional single-stage filtration easily causes poisoning of the adsorption tower, the present application provides a double-stage filtration device on the second pipeline and the third pipeline, which deeply removes oil mist, dust and liquid pollutants, and fundamentally protects the adsorption efficiency and service life of the molecular sieve adsorption tower. In terms of the oxygen production unit, the molecular sieve adsorption towers and the electrically controlled switching valve group are arranged in parallel and work cooperatively, realizing the alternating circulation of adsorption and regeneration, completely solving the problem of oxygen supply interruption caused by single-tower regeneration downtime, making the oxygen output more continuous and stable, and reducing the fluctuation of the output flow. In addition, the pre-provided access hole on the equipment and the easily openable function bin doors significantly reduce the difficulty and cost of later operation and maintenance. Through the above modular integrated deployment scheme, the present application not only meets the application requirements of space-limited and rapid deployment environments such as cabins, mobile medical vehicles and disaster rescue, but also significantly improves the stability, continuity, energy efficiency and economy. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is a perspective view of the present application.

[0035] Figure 2The utility model discloses a removable part bin door's internal structure view no.

[0036] Figure 3 The utility model discloses a removable part bin door's internal structure view no.

[0037] Figure 4 The utility model discloses a removable part bin door's internal structure view no.

[0038] Figure 5 The utility model discloses a removable part bin door's internal structure view no.

[0039] Figure 6 The utility model discloses a removable part bin door's internal structure view no.

[0040] Figure 7 The utility model discloses a removable part bin door's internal structure view no.

[0041] Figure 8 The utility model discloses a removable part bin door's internal structure view no.

[0042] The utility model discloses a removable part bin door's internal structure view no. Specific implementation

[0043] The following specific implementation provides for the implementation of the utility model various different embodiments or examples. Of course, these are only examples and are not intended to be limiting. In addition, the same reference numbers can be used in different embodiments, such as repeated numbers and / or letters. These repetitions are for the purpose of describing the invention simply and clearly, and do not represent a specific relationship between the different embodiments and / or structures discussed.

[0044] Moreover, words related to spatial relationships, such as "below", "lower", "from inside to outside", "above", "upper", and the like, can be used herein. These spatial relationship words are used to facilitate the description of the relationship between some elements or features in the drawings and other elements or features in the drawings. The spatial relationship words include different orientations of the device in use or operation, and the orientations described in the drawings. The device can be rotated by 90 degrees or other orientations, and the spatial relationship words used therein can also be interpreted accordingly. Therefore, it cannot be understood as a limitation of the present application. The terms "first", "second" are used for description purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" can be explicitly or implicitly included one or more features.

[0045] The utility model will be further described below in combination with the drawings and specific embodiments: as Figures 1 to 8 The utility model discloses an integrated oxygen generator, including the box body 1 that is separated into air treatment bin 10a, gas storage bin 10b, oxygen production bin 10c and control bin 10d by multiple partition 11, the box body 1 is equipped with the bin door 13 that can open on the side wall of air treatment bin 10a, gas storage bin 10b, oxygen production bin 10c and control bin 10d respectively. Air treatment unit 2 for compressing and pretreating ambient air is installed in air treatment bin 10a, and compressed air storage unit 3 with double-stage cache structure formed by first compressed air tank 31 and second compressed air tank 32 in series is installed in gas storage bin 10b. Oxygen production unit 7 for separating oxygen from the pretreated air delivered by second compressed air tank 32 and outputting the separated oxygen to external oxygen equipment or oxygen storage tank is installed in oxygen production bin 10c, and the maintenance opening 12 is detachably arranged on the top of the box body 1 corresponding to oxygen production bin 10c, which facilitates the maintenance of oxygen production unit 7. Since nitrogen gas is discharged during the oxygen production process of oxygen production unit 7, oxygen production unit 7 is arranged in the independent oxygen production bin 10c. Control unit 5 for controlling air treatment unit 2, compressed air storage unit 3 and oxygen production unit 7 to realize directional gas delivery through the preset pipeline structure is installed in control bin 10d. Discharge valve A 33 is installed at the bottom of first compressed air tank 31 and second compressed air tank 32, and its opening and closing are controlled by control unit 5 according to the signal of tank pressure sensor, and the discharge period can be set to 2-24 hours.

[0046] Among them, as Figures 2 to 8As shown, the air treatment unit 2 includes a compressor 21 with its outlet connected to the inlet of the first compressed air tank 31 through a first pipeline 51, and a drying device 22 with its inlet connected to the outlet of the first compressed air tank 31 through a second pipeline 52, and the outlet of the drying device 22 is connected to the inlet of the second compressed air tank 32 through a third pipeline 53. As can be clearly seen from the figure, the air treatment compartment 10a where the compressor 21 and the drying device 22 are located is located above the side of the air storage compartment 10b, so that the heat generated by the compressor 21 and the drying device 22 during operation can be diffused from the opening at the top of the box body 1. The second pipeline 52 and the third pipeline 53 are respectively provided with filter devices 4, each of which is provided with a discharge valve B9 at the bottom, for removing impurities such as oil and dust. The filter device 4 includes a first filter 41 connected in series on the second pipeline 52 for removing large-particle impurities in the compressed air, and a second filter 54 connected in series on the third pipeline 53 for removing fine oil mist and dust.

[0047] In addition, the oxygen production unit 7 adopts PSA pressure swing adsorption technology, including a molecular sieve adsorption tower A71 and a molecular sieve adsorption tower B72, both of which are connected in parallel to the second compressed air tank 32 through a fourth pipeline 55, and the molecular sieve adsorption tower A71 and the molecular sieve adsorption tower B72 are filled with Li-LSX molecular sieve filler. The inlet and outlet of the molecular sieve adsorption tower A71 and the molecular sieve adsorption tower B72 are respectively provided with an electrically controlled switching valve group 73, the fourth pipeline 55 is connected to the electrically controlled switching valve group 73 at the inlet of the molecular sieve adsorption tower A71 and the molecular sieve adsorption tower B72, and the electrically controlled switching valve group 73 at the outlet of the molecular sieve adsorption tower A71 and the molecular sieve adsorption tower B72 is connected to an external oxygen-using equipment or an oxygen storage tank. Specifically, the inlet of the molecular sieve adsorption tower A71 and the molecular sieve adsorption tower B72 is respectively connected with an inlet branch pipe 6, the outlet of the fourth pipeline 55 is connected to the two inlet branch pipes 6 through a three-way connector, the inlet branch pipe 6 of the molecular sieve adsorption tower A71 and the molecular sieve adsorption tower B72 is respectively connected with a nitrogen discharge port 74 through a three-way connector, the outlet of the two outlet branch pipes 8 of the molecular sieve adsorption tower A71 and the molecular sieve adsorption tower B72 is respectively provided with an outlet branch pipe 8, the outlet of the two outlet branch pipes 8 is connected with an oxygen delivery pipe 81 through a three-way connector, and the electrically controlled switching valve group 73 includes a first solenoid valve 61 respectively provided on the two nitrogen discharge ports 74, a second solenoid valve 62 respectively connected on the two inlet branch pipes 6, and a third solenoid valve 63 respectively connected on the two outlet branch pipes 8.

[0048] As Figure 3 and Figure 4 and Figure 6 and Figure 7As shown, in order to introduce high-purity oxygen to reverse flush the residual nitrogen in the non-working adsorption tower when the molecular sieve adsorption tower A71 and the molecular sieve adsorption tower B72 are switched, a purge pipe 82 is connected between the two gas outlet branches 8, the purge pipe 82 is located between the gas outlet end of the molecular sieve adsorption tower A71 and the molecular sieve adsorption tower B72 and the corresponding third electromagnetic valve 63, and a fourth electromagnetic valve 83 is arranged on the purge pipe 82.

[0049] Finally, the control unit 5 comprises a man-machine interaction panel 50 arranged on the bin door 13 corresponding to the control bin 10d, the man-machine interaction panel 50 is integrated with a pressure monitoring module and an operating state indicating module, a PLC controller connected with the man-machine interaction panel 50 in signal and a power module (not shown in the figure) for supplying power to the entire integrated oxygen generator are installed in the control bin 10d, the man-machine interaction panel 50 is integrated with a touch screen, and the real-time pressure value of each pipeline, the oxygen concentration detected by the oxygen sensor, the equipment running time and the fault code can be displayed. The PLC controller adjusts the output pressure of the compressor 21 by the PID algorithm, maintains the pressure in the second compressed air tank 32, and is electrically connected with the drying device 22, the electrically controlled switch valve group 73 and the exhaust valve A33 and the exhaust valve B9 respectively.

[0050] The working principle of the utility model is: the ambient air is compressed by the compressor 21 and enters the first compressed air tank 31 for preliminary pressure stabilization, enters the drying device 22 for dehydration after removing particles by the first filter 41, and the compressed air after drying is stored in the second compressed air tank 32 after precision filtration by the second filter 54. The control unit 5 switches the electrically controlled switch valve group 73 according to the preset time sequence, so that the compressed air alternately enters the molecular sieve adsorption tower A71 and the molecular sieve adsorption tower B72, and the required concentration of oxygen is prepared by pressure swing adsorption. When switching, the fourth electromagnetic valve 83 is opened, and the oxygen output by the working tower is used to reverse flush the non-working tower, so that the residual amount of nitrogen is ensured to meet the next molecular sieve working requirement. The system operating parameters can be stored as 10 preset modes through the man-machine interaction panel 50, and different scene requirements such as medical treatment and industry are supported.

[0051] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above, and those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principle of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The protection scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An integrated oxygen generator, characterized in that, include: The housing (1) is divided into independent air handling chambers (10a), air storage chambers (10b), oxygen generating chambers (10c) and control chambers (10d) by multiple partitions (11). The chambers are connected by pipelines through pre-set through holes. An air handling unit (2) is disposed within the air handling chamber (10a) and is used to compress and pre-treat ambient air; A compressed air storage unit (3) is disposed in the air storage chamber (10b). The compressed air storage unit (3) includes a first compressed air tank (31) and a second compressed air tank (32). The first compressed air tank (31) and the second compressed air tank (32) are connected in series to form a two-stage buffer structure, so that the compressed air from the air handling unit (2) flows through the first compressed air tank (31) and the second compressed air tank (32) in sequence. An oxygen generating unit (7) is installed inside the oxygen generating chamber (10c). The oxygen generating unit (7) is used to separate oxygen from the pre-treated air delivered by the second compressed air tank (32) and output the separated oxygen to external oxygen-using equipment or oxygen storage tank. The control unit (5) is located in the control compartment (10d) and is used to control the air handling unit (2), compressed air storage unit (3) and oxygen generation unit (7) to achieve directional gas delivery through a preset pipeline structure.

2. The integrated oxygen generator according to claim 1, characterized in that, The air handling unit (2) includes: The compressor (21) has its outlet end connected to the inlet of the first compressed air tank (31) via a first pipeline (51); The air inlet of the drying device (22) is connected to the air outlet of the first compressed air tank (31) through the second pipeline (52), and its air outlet is connected to the air inlet of the second compressed air tank (32) through the third pipeline (53). A filter device (4) with a drain valve B (9) installed at the bottom is provided on the second pipeline (52) and the third pipeline (53) respectively to remove oil and dust.

3. The integrated oxygen generator according to claim 2, characterized in that, The filtration device (4) includes a first filter (41) connected in series on the second pipeline (52) and a second filter (54) connected in series on the third pipeline (53).

4. The integrated oxygen generator according to claim 3, characterized in that, The oxygen generation unit (7) includes: Molecular sieve adsorption tower A (71) and molecular sieve adsorption tower B (72) are set in parallel. Electrically controlled switching valve groups (73) are respectively installed at the inlet and outlet ends of the molecular sieve adsorption tower A (71) and molecular sieve adsorption tower B (72). The outlet of the second compressed air tank (32) is connected to the input end of the electrically controlled switching valve group (73) at the inlet end of the molecular sieve adsorption tower A (71) and the molecular sieve adsorption tower B (72) via the fourth pipeline (55), and the outlet end of the electrically controlled switching valve group (73) at the outlet end of the molecular sieve adsorption tower A (71) and the molecular sieve adsorption tower B (72) is connected to an external oxygen-using equipment or an oxygen storage tank.

5. An integrated oxygen generator according to claim 4, characterized in that, Both the first compressed air tank (31) and the second compressed air tank (32) are equipped with a discharge valve A (33) at the bottom.

6. An integrated oxygen generator according to claim 5, characterized in that, The control unit (5) includes a human-machine interface panel (50), which integrates a pressure monitoring module and an operating status indicator module. The signal output terminal of the human-machine interface panel (50) is electrically connected to the compressor (21), the drying device (22), the electronically controlled switching valve group (73), and the discharge valve A (33) and the discharge valve B (9), respectively.

7. An integrated oxygen generator according to claim 4, characterized in that, An inlet branch pipe (6) is connected to the inlet of the molecular sieve adsorption tower A (71) and the molecular sieve adsorption tower B (72), respectively. The outlet of the fourth pipeline (55) is connected to the two inlet branch pipes (6) respectively via a three-way connector. A nitrogen discharge port (74) is connected to the inlet branch pipe (6) of the molecular sieve adsorption tower A (71) and the molecular sieve adsorption tower B (72) respectively via a three-way connector. (72) The outlet end is provided with an outlet branch pipe (8). The outlet ends of the two outlet branch pipes (8) are connected to an oxygen delivery pipe (81) and connected to an external oxygen-using equipment or an oxygen storage tank through a three-way connector. The electronically controlled switching valve group (73) includes a first solenoid valve (61) provided on the two nitrogen outlets (74), a second solenoid valve (62) connected on the two inlet branch pipes (6), and a third solenoid valve (63) connected on the two outlet branch pipes (8).

8. An integrated oxygen generator according to claim 7, characterized in that, A purge pipe (82) is connected between the two outlet branches (8). The purge pipe (82) is located between the outlet ends of the molecular sieve adsorption tower A (71) and the molecular sieve adsorption tower B (72) and their respective third solenoid valves (63). A fourth solenoid valve (83) is provided on the purge pipe (82).

9. An integrated oxygen generator according to any one of claims 1 to 8, characterized in that, An inspection port (12) is detachably provided on the top of the box (1) corresponding to the oxygen generating chamber (10c).

10. An integrated oxygen generator according to claim 9, characterized in that, On the side walls of the housing (1) corresponding to the air handling chamber (10a), the air storage chamber (10b), the oxygen generating chamber (10c) and the control chamber (10d), there are respectively openable chamber doors (13).

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