Efficient clean type oxygen enrichment machine

Abstract

The utility model discloses an efficient clean type oxygen enrichment machine which comprises an air blowing pipeline, a waste gas pipeline, an oxygen enrichment pipeline and an automatic control module, and an air filter, an air blower, a front-end cooler, a regulation and control valve and a pressure swing adsorption module are sequentially arranged on the air blowing pipeline. An oxygen outlet end and an exhaust outlet end of the pressure swing adsorption module are respectively connected and communicated with an oxygen-enriched pipeline and a waste gas pipeline; a regulating valve, a rear-end cooler, an oxygen sterilizing filter and a regulating valve are sequentially arranged on the oxygen-enriched pipeline; an oxygen-enriched branch is also arranged on the corresponding oxygen-enriched pipeline between the oxygen sterilization filter and the regulation and control valve, and a mixing valve is arranged on the oxygen-enriched branch; and an air blowing branch is connected to the corresponding air blowing pipeline between the front-end cooler and the regulation and control valve. The device adopts a tower-free VPSA oxygen production technology and is combined with an efficient filtering system, so that efficient oxygen production in the medical field is realized. Meanwhile, the oxygen enrichment machine can flexibly adjust the oxygen generation concentration according to medical requirements, and the requirements for oxygen-enriched gases with different concentrations in medical treatment are fully met while efficient oxygen generation is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of medical oxygen production, in particular to a high-efficiency and clean oxygen enrichment machine. Background Art

[0002] In the medical field, oxygen, as a vital treatment method, is widely used in emergency treatment, respiratory support, intensive care, and long-term oxygen therapy. With the continuous advancement of medical technology and the growing needs of patients, higher requirements are placed on the quality and supply stability of medical oxygen.

[0003] Traditionally, medical oxygen has been produced primarily through cryogenic air separation. This method utilizes the boiling point difference between oxygen and nitrogen in air to separate the two through a complex liquefaction and distillation process, resulting in high-purity oxygen. This method produces oxygen with high purity and stability, making it the primary oxygen supply method for large medical institutions such as hospitals. However, the drawbacks of cryogenic air separation oxygen production equipment, such as high investment, high energy consumption, and demanding site and operational maintenance requirements, have limited its widespread adoption in small and medium-sized medical institutions and for home oxygen therapy.

[0004] To meet broader market demands, pressure swing adsorption (PSA) oxygen production technology has emerged. Vacuum pressure swing adsorption (VPSA) utilizes the varying adsorption capacities of adsorbents, such as lithium-based molecular sieves, for different air components to separate and purify oxygen under varying pressures. Compared to cryogenic air separation, VPSA oxygen production equipment offers advantages such as low investment, low energy consumption, and simplified operation and maintenance, making it particularly suitable for small and medium-sized medical institutions and home oxygen therapy.

[0005] However, the lithium molecular sieve adsorption towers used in current VPSA oxygen generators for medical applications are generally designed as pressure vessels, which not only increases the overall complexity of the equipment but also increases maintenance costs. Furthermore, the relatively simple structural design of existing VPSA oxygen generators makes it difficult to flexibly adapt to the diverse oxygen concentration requirements in medical environments, resulting in certain application limitations. Utility Model Content

[0006] The technical problem to be solved by the utility model is to overcome the defects of the existing medical VPSA equipment and provide a high-efficiency clean oxygen enrichment machine.

[0007] Specifically, a high-efficiency clean oxygen enricher includes a blast pipeline, an exhaust pipeline, an oxygen enrichment pipeline and a control valve, wherein the control valve includes a first control valve, a third control valve and a fourth control valve;

[0008] The blast pipeline is sequentially provided with a first filter, a blower, a front-end cooler, a first regulating valve and a pressure swing adsorption module. The oxygen outlet and exhaust outlet of the pressure swing adsorption module are connected to the oxygen enrichment pipeline and the exhaust gas pipeline respectively.

[0009] The oxygen-enriched pipeline is sequentially provided with a third regulating valve, a rear-end cooler, a second filter and a fourth regulating valve; an oxygen-enriched branch is also provided on the oxygen-enriched pipeline corresponding to the second filter and the fourth regulating valve, and a mixing valve is provided on the oxygen-enriched branch; the blast pipeline corresponding to the front-end cooler and the first regulating valve is connected to a blast branch, and a regulating valve and a third filter are provided on the blast branch, and the end of the blast branch is connected to the air inlet of the mixing valve.

[0010] As an improved solution, the control valve further includes a second control valve. The exhaust gas pipeline is provided with a second control valve and a vacuum pump in sequence. The second control valve is connected after the exhaust outlet of the pressure swing adsorption module.

[0011] As an improved solution, a check valve is further provided on the oxygen-enriched branch line. The check valve is installed between the mixing valve and the second filter, or between the mixing valve and the fourth regulating valve.

[0012] As an improved solution, a muffler is further provided at the end of the exhaust gas pipe.

[0013] As an improved solution, the pressure swing adsorption module includes two or more adsorption submodules arranged in parallel, and each adsorption submodule 15 includes a plurality of radial oxygen-generating adsorption tubes arranged in parallel.

[0014] As an improved solution, an oxygen concentration sensor is provided on the oxygen-enriched branch corresponding to the gas outlet end of the mixing valve.

[0015] As an improved solution, it also includes an automatic control module, which is respectively connected to the oxygen concentration sensor and the control valve for communication. The automatic control module receives the oxygen concentration signal from the oxygen concentration sensor and transmits a control signal to the control valve.

[0016] As an improved solution, the automatic control module includes a controller and an actuator, and the controller is communicatively connected to the oxygen concentration sensor and the actuator respectively.

[0017] As an improved solution, the controller is implemented as a DDC or PLC controller.

[0018] The utility model has the beneficial effects:

[0019] 1. The oxygen enricher in this utility model utilizes towerless VPSA oxygen production technology combined with a high-efficiency filtration system, achieving efficient oxygen production in the medical field. Furthermore, the oxygen enricher can flexibly adjust the oxygen concentration according to medical needs, ensuring efficient oxygen production while fully meeting the medical demand for different concentrations of oxygen-enriched gas.

[0020] 2. When the pipeline connected to the control valve at the end of the oxygen enrichment pipeline needs to be inspected or maintained, the control valve can be closed and the check valve opened at the same time. At this time, the high-concentration pure oxygen-enriched gas in the oxygen enrichment pipeline will flow directly through the oxygen enrichment branch and out through the opened check valve, providing emergency oxygen supply for patients with high concentration needs. This not only ensures the patient's oxygen needs, but also further improves the overall safety performance of the oxygen enrichment machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0022] Figure 1 This is a schematic diagram of the overall structure of the utility model's low-energy consumption tower-less VPSA oxygen production system;

[0023] Figure 2 This is a schematic structural diagram of the pressure swing adsorption module in the utility model;

[0024] Figure 3 It is a structural diagram of the automatic control module of the utility model.

[0025] The figures are marked as follows: 101, air blast line; 102, exhaust gas line; 103, air blast branch; 104, oxygen enrichment line; 105, oxygen enrichment branch; 2, first filter; 3, blower; 4, front-end cooler; 5, pressure swing adsorption module; 601, first control valve; 602, second control valve; 603, third control valve; 604, fourth control valve; 7, vacuum pump; 8, muffler; 9, controller; 10, rear-end cooler; 11, second filter; 12, regulating valve; 13, third filter; 14, mixing valve; 15, adsorption submodule; 16, check valve; 17, actuator. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not limit the scope of protection of the present invention.

[0027] It should be noted that the terms "first" and "second" herein do not represent specific quantities or orders, but are merely used to distinguish names. The term "and / or" as used herein includes any and all combinations of one or more of the related listed items.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0029] The specific implementation of the present utility model is described in detail below with reference to the accompanying drawings.

[0030] Part I. Structural Layout of the Device

[0031] The specific structure of the high-efficiency clean oxygen enricher is as follows: Figure 1 As shown, the system includes an air blast pipeline 101, an exhaust pipeline 102, an oxygen enrichment pipeline 104 and control valves, and the control valves include a first control valve 601, a third control valve 603 and a fourth control valve 604;

[0032] The blast pipeline 101 is sequentially provided with a first filter 2, a blower 3, a front-end cooler 4, a first control valve 601, and a pressure swing adsorption module 5. The oxygen outlet and exhaust outlet of the pressure swing adsorption module 5 are connected to the oxygen enrichment pipeline 104 and the exhaust gas pipeline 102, respectively.

[0033] The oxygen enrichment line 104 is sequentially provided with a third control valve 603, a rear-end cooler 10, a second filter 11, and a fourth control valve 604. The oxygen enrichment line 104 corresponding to the line between the second filter 11 and the fourth control valve 604 is also provided with an oxygen enrichment branch 105, which is equipped with a mixing valve 14. The air blast line 101 corresponding to the line between the front-end cooler 4 and the first control valve 601 is connected to a blast branch 103, which is equipped with a regulating valve 12 and a third filter 13. The end of the blast branch 103 is connected to the air inlet of the mixing valve 14. The control valve also includes a second control valve 602. The exhaust line 102 is sequentially provided with the second control valve 602 and a vacuum pump 7. The second control valve 602 is connected after the exhaust outlet of the pressure swing adsorption module 5.

[0034] As a preferred example, a check valve 16 is further provided on the oxygen-enriched branch 105 . The check valve is installed between the mixing valve 14 and the second filter 11 , or between the mixing valve 14 and the fourth regulating valve 604 .

[0035] As a preferred example, a muffler 8 is further provided at the end of the exhaust pipe 102 .

[0036] As a preferred example, an oxygen concentration sensor is also provided on the oxygen-enriched branch 105 corresponding to the outlet end of the mixing valve 14, which is used to monitor the oxygen concentration at the oxygen outlet of the oxygen-enriched branch 105 in real time; the blast pipe 101 corresponding to the front-end cooler 4 and the first regulating valve 601 is connected to the blast branch 103, and the blast branch 103 is provided with a regulating valve 12 and a third filter 13, and its end is connected to the air inlet of the mixing valve 14.

[0037] Specifically, the pressure swing adsorption module 5 includes two or more adsorption submodules 15 arranged in parallel, each of which includes several radial oxygen adsorption tubes arranged in parallel. In this example, each adsorption submodule 15 is composed of four radial oxygen adsorption tubes arranged in parallel. The adsorption submodule 15 preferably adopts the equipment structure described in Chinese Patent CN118236811A. Its function and purpose is to replace the pressure adsorption tower in a traditional tower-type VPSA system. Its adsorption and desorption processes are consistent with those of a tower-type VPSA system and are therefore not described in detail here. In actual operating conditions, the adsorption submodule can be composed of multiple radial oxygen adsorption tubes, with a minimum of one. The specifications of each radial oxygen adsorption tube are: a total axial length of 700 mm, an inner diameter of 200 mm at the end, and an internal geometric volume of approximately 0.023 m³ and less than 0.025 m³ (it is a non-pressure vessel). A single pressure swing adsorption module 5 can produce approximately 166 Nm³ / h of oxygen at a 90% concentration.

[0038] In the present invention, the control valves (first to fourth control valves 601 to 604 ), the regulating valve 12 , the check valve 16 and the control valves in the pressure swing adsorption module 5 are preferably electrically controlled valves for controlling or shutting off the airflow.

[0039] The blower is a high-efficiency blower and can be a mature product on the market, including magnetic levitation or air suspension blower; the vacuum pump gives priority to the mature magnetic levitation vacuum pump, vortex vacuum pump or air suspension vacuum pump on the market.

[0040] The second filter is implemented as an oxygen sterilizing filter 11, and the third filter 13 is implemented as an air sterilizing filter 13. The oxygen sterilizing filter 11 and the air sterilizing filter 13 can be HEPA (High Efficiency Particulate Air) filters.

[0041] The oxygen enricher also includes an automatic control module, which is respectively connected to the oxygen concentration sensor and the control valve for communication. The automatic control module receives the oxygen concentration signal from the oxygen concentration sensor and transmits control instructions to the control valve.

[0042] Specifically, the automatic control module includes a controller 9 and an actuator 17. The controller 9 is connected to the oxygen concentration sensor and the actuator 17 via wired electrical connections. The controller 9 is implemented as a DDC or PLC controller.

[0043] The controller 9 receives data signals from the oxygen concentration sensor and processes the data according to a preset program or algorithm. At the same time, the actuator 17 receives control signals from the controller 9 and converts them into mechanical motion or other forms of energy output, thereby realizing automatic control of each electronically controlled valve.

[0044] Part II: Device Operation Instructions:

[0045] The air passes through air filter 2 to remove dust and particles to ensure air purity and prevent clogging of the adsorbent. The air is then pressurized by blower 3 and transported to front-end cooler 4, where it is cooled to an appropriate temperature (35-45°C) and then supplied as pressurized feed air to the subsequent pressure swing adsorption module 5 for vacuum pressure swing adsorption oxygen production, or flows into blast branch 103 as mixing air.

[0046] In the pressure swing adsorption module 5, moisture, carbon dioxide and a small amount of other gas components in the raw air are adsorbed by the activated alumina loaded at the bottom of the oxygen production adsorption tube at the inlet, and then nitrogen is adsorbed by the zeolite molecular sieve in the oxygen production adsorption tube, while oxygen and other non-adsorbable components are discharged into the oxygen exhaust pipe from the top outlet of the oxygen production adsorption tube as product gas, thereby producing an oxygen-rich gas with a concentration of about 90% that flows into the oxygen-rich pipeline 104; when the zeolite molecular sieve in the oxygen production adsorption tube in the adsorption sub-module 15 reaches a saturated state, the nitrogen and other gas components in the zeolite molecular sieve will be sucked out of the pipeline by the vacuum pump 7 in the exhaust gas pipeline 102, and discharged into the atmosphere after noise reduction treatment by the muffler 8.

[0047] In the oxygen-enriched line 104, the oxygen-enriched gas flows through the control valve 603 into the back-end cooler 10 for secondary cooling. The cooled oxygen-enriched gas then enters the oxygen sterilizing filter 11, where it undergoes a highly efficient impurity and sterilization process to ensure that the amount of solid particles in the oxygen is extremely low, meeting the cleanliness standards for medical oxygen. The highly concentrated, clean oxygen-enriched gas is then discharged through the control valve 604 for use by medical patients experiencing simple hypoxia without carbon dioxide retention.

[0048] If low- to medium-concentration oxygen-enriched gas is required during a medical procedure, this can be achieved by opening the regulating valve 12 and check valve 16, allowing the initially filtered, pressurized, and cooled air to enter the blast branch 103. This air then passes through the regulating valve 12 and into the air sterilizing filter 13 for secondary, high-efficiency filtration, resulting in pressurized clean air. A portion of the high-concentration clean oxygen-enriched gas is then introduced into the mixing valve 14 via the oxygen-enrichment branch 105 and check valve 16. In the mixing valve 14, the pressurized clean air and high-concentration oxygen-enriched gas are mixed according to the amount of oxygen added, resulting in low-concentration (less than 35%) or medium-concentration (35%-60%) oxygen-enriched gas. During use, the oxygen concentration at the outlet of the oxygen-enrichment branch 105 can be detected and processed by an oxygen concentration sensor for easy user reading. Low-concentration oxygen-enriched gas is suitable for patients with hypoxemia and carbon dioxide retention, while medium-concentration oxygen-enriched gas is used for patients with significant ventilation-perfusion imbalance or significant diffusion impairment, thus meeting the diverse needs for different oxygen concentrations in medical treatment.

[0049] Finally, when the pipeline corresponding to the fourth control valve 604 at the end of the oxygen-enriched pipeline 104 needs to be inspected or maintained, the regulating valve 12 is closed and the check valve 16 is opened. At this time, the high-concentration clean oxygen-enriched gas in the oxygen-enriched pipeline 104 flows directly through the oxygen-enriched branch 105 and the check valve 16 and flows out, which can be provided for emergency use by high-concentration patients.

Claims

1. A high-efficiency clean oxygen enricher, characterized in that: It includes an air blast pipeline, an exhaust pipeline, an oxygen enrichment pipeline and a regulating valve, wherein the regulating valve includes a first regulating valve, a third regulating valve and a fourth regulating valve; The blast pipeline is sequentially provided with a first filter, a blower, a front-end cooler, a first regulating valve and a pressure swing adsorption module. The oxygen outlet and exhaust outlet of the pressure swing adsorption module are connected to the oxygen enrichment pipeline and the exhaust gas pipeline respectively. The oxygen-enriched pipeline is sequentially provided with a third regulating valve, a rear-end cooler, a second filter and a fourth regulating valve; an oxygen-enriched branch is also provided on the oxygen-enriched pipeline corresponding to the second filter and the fourth regulating valve, and a mixing valve is provided on the oxygen-enriched branch; the blast pipeline corresponding to the front-end cooler and the first regulating valve is connected to a blast branch, and a regulating valve and a third filter are provided on the blast branch, and the end of the blast branch is connected to the air inlet of the mixing valve.

2. A high-efficiency clean oxygen enricher according to claim 1, characterized in that: The control valve further includes a second control valve. The exhaust gas pipeline is provided with a second control valve and a vacuum pump in sequence. The second control valve is connected after the exhaust outlet of the pressure swing adsorption module.

3. The high-efficiency clean oxygen enricher according to claim 1, characterized in that: A check valve is further provided on the oxygen-enriched branch line. The check valve is installed between the mixing valve and the second filter, or between the mixing valve and the fourth regulating valve.

4. The high-efficiency clean oxygen enricher according to claim 1, characterized in that: A muffler is also provided at the end of the exhaust gas pipeline.

5. The high-efficiency clean oxygen enricher according to claim 1, characterized in that: The pressure swing adsorption module includes two or more adsorption submodules arranged in parallel, and each adsorption submodule includes a plurality of radial oxygen-generating adsorption tubes arranged in parallel.

6. A high-efficiency clean oxygen enricher according to any one of claims 1 to 5, characterized in that: An oxygen concentration sensor is provided on the oxygen-rich branch corresponding to the gas outlet end of the mixing valve.

7. The high-efficiency clean oxygen enricher according to claim 6, characterized in that: It also includes an automatic control module, which is respectively connected to the oxygen concentration sensor and the control valve for communication. The automatic control module receives the oxygen concentration signal from the oxygen concentration sensor and transmits a control signal to the control valve.

8. The high-efficiency clean oxygen enricher according to claim 7, characterized in that: The automatic control module includes a controller and an actuator, and the controller is communicatively connected to the oxygen concentration sensor and the actuator respectively.

9. The high-efficiency clean oxygen enricher according to claim 8, characterized in that: The controller is implemented as a DDC or PLC controller.

10. The high-efficiency clean oxygen enricher according to claim 3, characterized in that: The regulating valve, the regulating valve, the check valve and the control valve in the pressure swing adsorption module are all implemented as electrically controlled valves.

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