Method for increasing pressure of oxygen storage tank of medical oxygen generation system and medical oxygen generation system

Abstract

The invention provides a method for increasing the pressure of an oxygen storage tank of a medical oxygen generation system and the medical oxygen generation system.The method comprises the steps that when the oxygen generation system is started, and the oxygen concentration is lower than the first set concentration, a first set of set time sequence is executed; when the oxygen concentration reaches the first set concentration, the pressure of the oxygen storage tank is continuously monitored; when the pressure of the oxygen storage tank is within a second set pressure range, the oxygen generation system executes a second set of set time sequence; when the pressure of the oxygen storage tank is within a third set pressure range, the oxygen generation system executes a third set of set time sequence; when the pressure of the oxygen storage tank is within a fourth set pressure range, the oxygen generation system executes a fourth set of set time sequence; when the pressure of the oxygen storage tank reaches a first set pressure value, the oxygen generation system stops running and enters a standby state, and when the pressure of the oxygen storage tank drops to a second set pressure value, the oxygen generation system is started. The system has the advantages that the oxygen concentration in the oxygen storage tank is ensured while the cost and the energy consumption are reduced.

Description

Technical Field

[0001] This application belongs to the field of medical oxygen generation technology, specifically relating to a method for increasing the pressure of an oxygen storage tank in a medical oxygen generation system and the medical oxygen generation system itself. Background Technology

[0002] Oxygen produced in a medical molecular sieve oxygen generation system is first stored in an oxygen buffer tank and then enters an oxygen storage tank to supply oxygen to the hospital. To ensure the oxygen concentration in the storage tank, a throttling valve is usually installed between the oxygen buffer tank and the storage tank. However, the throttling valve results in lower pressure in the storage tank, making it impossible to stop the oxygen generation system at high pressure. The range between low-pressure start-up and pressure start-stop is extremely small. This means that even when the hospital's oxygen usage is low, it still needs to operate at rated power, which fails to achieve energy conservation, emission reduction, and energy consumption reduction.

[0003] The following methods exist in the prior art to solve the above problems: 1. Increasing the oxygen flow rate into the oxygen storage tank increases the pressure of the tank. However, this method, by increasing the flow rate too much, can cause the oxygen concentration in the storage tank to fall below the regulatory requirements, failing to effectively maintain both the pressure and the oxygen concentration of the storage tank.

[0004] 2. An oxygen booster is installed between the oxygen buffer tank and the oxygen storage tank. When the rated output exceeds the hospital's oxygen consumption, the booster can increase the pressure from 0.4 MPa to 1 MPa before delivering it to the storage tank, maintaining a higher pressure level and effectively controlling pressure start-up and shutdown. However, the oxygen booster is an optional accessory, incurring additional costs, and it also consumes energy, offsetting the energy savings from the oxygen production process.

[0005] 3. The pressure of the oxygen storage tank is increased by relying on the pressure within the adsorption tower itself. However, due to the throttling valve designed between the oxygen buffer tank and the oxygen storage tank, the pressure of the oxygen storage tank is generally maintained at around 0.45 MPa. The pressure start-up and shutdown range is too small to achieve pressure start-up and shutdown. Summary of the Invention

[0006] The purpose of this application is to overcome the shortcomings of existing technologies in ensuring high energy consumption or high cost when maintaining oxygen concentration in oxygen storage tanks.

[0007] To achieve the above objectives, this application proposes a method for increasing the pressure of an oxygen storage tank in a medical oxygen generation system, comprising: When the oxygen generation system starts up, if the oxygen concentration is lower than the first set concentration, the first set of set timing sequences will be executed; When the oxygen concentration reaches the first set concentration, the pressure of the oxygen storage tank is continuously monitored. When the pressure in the oxygen storage tank is within the second set pressure range, the oxygen generation system executes the second set of set timing sequences. When the pressure of the oxygen storage tank is within the third set pressure range, the oxygen generation system executes the third set of set timing sequences. When the pressure of the oxygen storage tank is within the fourth set pressure range, the oxygen generation system executes the fourth set of set timing sequences. When the pressure in the oxygen storage tank reaches the first set pressure value, the oxygen generation system stops operating and enters standby mode. When the pressure in the oxygen storage tank drops to the second set pressure value, the oxygen generation system starts.

[0008] As an improvement to the above method, the first set concentration is 90%.

[0009] As an improvement to the above method, the execution time of each step in the first set of timing parameters is: Step 1: 6 seconds; Step 2: 1 second; Step 3: 0 seconds; Step 4: 11-13 seconds; Step 5: 3-5 seconds; Step 6: 2-4 seconds; Step 7: 3-5 seconds; Step 8: 3-5 seconds; Step 9: 3-5 seconds; Step 10: 1 second; Step 11: 6 seconds; Step 12: 1 second; Step 13: 0 seconds; Step 14: 11-13 seconds; Step 15: 3-5 seconds; Step 16: 2-4 seconds; Step 17: 3-5 seconds; Step 18: 3-5 seconds; Step 19: 3-5 seconds; Step 20: 1 second.

[0010] As an improvement to the above method, the second set pressure range is 0.42 MPa - 0.49 MPa; The execution time of each step in the second set of timing settings is: Step 1: 6 seconds; Step 2: 1 second; Step 3: 0 seconds; Step 4: 13-15 seconds; Step 5: 3-5 seconds; Step 6: 3-5 seconds; Step 7: 3-5 seconds; Step 8: 4-6 seconds; Step 9: 3-5 seconds; Step 10: 1 second; Step 11: 6 seconds; Step 12: 1 second; Step 13: 0 seconds; Step 14: 13-15 seconds; Step 15: 3-5 seconds; Step 16: 3-5 seconds; Step 17: 3-5 seconds; Step 18: 4-6 seconds; Step 19: 3-5 seconds; Step 20: 1 second.

[0011] As an improvement to the above method, the third set pressure range is 0.5 MPa to 0.53 MPa; The execution time of each segment of the third set of timing settings is: Step 1: 6 seconds; Step 2: 1 second; Step 3: 0 seconds; Step 4: 15-17 seconds; Step 5: 4-6 seconds; Step 6: 4-6 seconds; Step 7: 3-5 seconds; Step 8: 6-8 seconds; Step 9: 3-5 seconds; Step 10: 1 second; Step 11: 6 seconds; Step 12: 1 second; Step 13: 0 seconds; Step 14: 15-17 seconds; Step 15: 4-6 seconds; Step 16: 4-6 seconds; Step 17: 3-5 seconds; Step 18: 6-8 seconds; Step 19: 3-5 seconds; Step 20: 1 second.

[0012] As an improvement to the above method, the fourth set pressure range is 0.54 MPa - 0.57 MPa; The execution time of each step in the fourth set of timing settings is: Step 1: 6 seconds; Step 2: 1 second; Step 3: 0 seconds; Step 4: 17-19 seconds; Step 5: 4-6 seconds; Step 6: 6-8 seconds; Step 7: 5-6 seconds; Step 8: 8-10 seconds; Step 9: 3-5 seconds; Step 10: 1 second; Step 11: 6 seconds; Step 12: 1 second; Step 13: 0 seconds; Step 14: 17-19 seconds; Step 15: 4-6 seconds; Step 16: 6-8 seconds; Step 17: 5-6 seconds; Step 18: 8-10 seconds; Step 19: 3-5 seconds; Step 20: 1 second.

[0013] As an improvement to the above method, the first set pressure value is 0.57 MPa; the second set pressure value is 0.42 MPa.

[0014] As an improvement to the above method, it also includes: Before starting the oxygen generation system, adjust the cumulative hourly flow rate of the oxygen buffer tank to 1.2. Q -1.3 Q ;in, Q This refers to the rated flow rate of the oxygen generation system.

[0015] This application also provides a medical oxygen generation system that uses the above-described method to increase the pressure of an oxygen storage tank.

[0016] Compared with existing technologies, the advantages of this application are: The oxygen concentration in the oxygen storage tank can be guaranteed simply by adjusting the execution time of each step of the oxygen generation module, without the need for an additional oxygen booster, and it also saves energy. Attached Figure Description

[0017] Figure 1 The diagram shown is a structural diagram of a medical oxygen generation system. Figure 2The diagram shown is a detailed structural diagram of the oxygen generation module, oxygen storage and production module; Figure 3 The diagram shown is an oxygen flow rate-time graph. Detailed Implementation

[0018] The technical solution of this application will be described in detail below with reference to the accompanying drawings.

[0019] like Figure 1 As shown, the medical oxygen generation system involved in this application includes a gas source and pretreatment module, an oxygen generation module, and an oxygen storage and production module. The gas source and pretreatment module provides clean compressed air to the oxygen generation module. The oxygen generation module mainly includes two oxygen-generating adsorption towers and an oxygen buffer tank 8, used to store the generated oxygen in the oxygen buffer tank. The oxygen storage and production module mainly includes an oxygen storage tank 9, used to store the oxygen generated by the oxygen generation module and to supply oxygen to the hospital.

[0020] like Figure 2 As shown, the oxygen generation module includes a first adsorption tower 7-11, a second adsorption tower 7-12, a first venting valve 7-13, and several pneumatic shuttle valves.

[0021] For ease of description, the left side of the valve is referred to as the first connection end and the right side as the second connection end in this application.

[0022] Several pneumatic shuttle valves include: The first pneumatic shuttle valve 7-1 has its first connection end connected to the gas source and the pretreatment module, and its second connection end connected to the inlet of the first adsorption tower 7-11 and the second connection end of the second pneumatic shuttle valve 7-2. The second pneumatic shuttle valve 7-2 has its second connection end connected to the second connection end of the first pneumatic shuttle valve 7-1 and the inlet of the first adsorption tower 7-11, and its first connection end connected to the second connection end of the first vent valve 7-13 and the seventh pneumatic shuttle valve 7-7. The second connection end of the sixth pneumatic shuttle valve 7-6 is connected to the air source and pretreatment module and the first connection end of the first pneumatic shuttle valve 7-1. The first connection end is connected to the inlet of the second adsorption tower 7-12, the first connection end of the seventh pneumatic shuttle valve 7-7, and the first connection end of the third pneumatic shuttle valve 7-3. The seventh pneumatic shuttle valve 7-7 has its first connection end connected to the first connection end of the sixth pneumatic shuttle valve 7-6 and the inlet of the second adsorption tower 7-12, and its second connection end connected to the first vent valve 7-13 and the first connection end of the second pneumatic shuttle valve 7-2. The first connection end of the third pneumatic shuttle valve 7-3 is connected to the first connection end of the sixth pneumatic shuttle valve 7-6, the inlet of the second adsorption tower 7-12, and the first connection end of the seventh pneumatic shuttle valve 7-7. The second connection end is connected to the outlet of the first adsorption tower 7-11, the second connection end of the fourth pneumatic shuttle valve 7-4, and the second connection end of the fifth pneumatic shuttle valve 7-5. The eighth pneumatic shuttle valve 7-8 has its second connection end connected to the second connection end of the first pneumatic shuttle valve 7-1 and the inlet of the first adsorption tower 7-11, and its first connection end connected to the outlet of the second adsorption tower 7-12, the first connection end of the ninth pneumatic shuttle valve 7-9, and the first connection end of the tenth pneumatic shuttle valve 7-10. The fourth pneumatic shuttle valve 7-4 has its second connection end connected to the outlet of the first adsorption tower 7-11 and its first connection end connected to the inlet of the oxygen buffer tank 8. The ninth pneumatic shuttle valve 7-9 has its first connection end connected to the outlet of the second adsorption tower 7-12 and its second connection end connected to the inlet of the primary purified oxygen buffer tank 8. The fifth pneumatic shuttle valve 7-5 has its second connection end connected to the outlet of the first adsorption tower 7-11 and its first connection end connected to the inlet of the oxygen buffer tank 8. The tenth pneumatic shuttle valve 7-10 has its first connection end connected to the outlet of the second adsorption tower 7-12 and its second connection end connected to the inlet of the oxygen buffer tank 8.

[0023] When the existing medical oxygen generation system is working, it opens and closes each valve in a time sequence to produce oxygen. The valve opening or closing settings for each step are shown in Table 1.

[0024] Table 1. Valve opening and closing process for each stage of the medical oxygen generation system (marked 1 indicates valve opening).

[0025]

[0026] The steps are explained as follows: Step 1: The eighth pneumatic shuttle valve 7-8 is connected, and the oxygen in the second adsorption tower 7-12 flows to the first adsorption tower 7-11.

[0027] Step 2: The seventh pneumatic shuttle valve 7-7 is connected, and nitrogen gas is discharged from the upper part of the second adsorption tower 7-12. The nitrogen gas is discharged from the oxygen generator through the first vent valve 7-13; the fifth pneumatic shuttle valve 7-5 is connected, and the oxygen in the oxygen buffer tank 8 enters the first adsorption tower 7-11.

[0028] Step 3: Open pneumatic valve 7-6, air enters the second adsorption tower 7-12, increasing the pressure of the second adsorption tower. Open pneumatic valve 7-2, nitrogen is discharged from the first adsorption tower 7-11 to the oxygen generator. Open pneumatic valve 7-10, oxygen enters the second adsorption tower 7-12 from the oxygen buffer tank 8, increasing the pressure of the second adsorption tower.

[0029] Steps 4, 6, and 8 are operated in the same way: the first pneumatic shuttle valve 7-1 is connected, air enters the upper part of the first adsorption tower 7-11, the seventh pneumatic shuttle valve 7-7 is connected, nitrogen exits the upper part of the second adsorption tower 7-12, and the nitrogen is discharged from the oxygen generator through the first vent valve 7-13; the fifth pneumatic shuttle valve 7-5 is connected, and oxygen is delivered from the lower part of the first adsorption tower 7-11 to the primary oxygen purification buffer tank 8.

[0030] Steps 5, 7, and 9 are operated in the same way: the first pneumatic shuttle valve 7-1 is connected, and air enters the upper part of the first adsorption tower 7-11; the seventh pneumatic shuttle valve 7-7 is connected, and nitrogen is discharged from the upper part of the second adsorption tower 7-12. The nitrogen is discharged from the oxygen generator through the first vent valve 7-13; the fifth pneumatic shuttle valve 7-5 is connected, and oxygen is supplied from the lower part of the first adsorption tower 7-11 to the oxygen buffer tank 8; the tenth pneumatic shuttle valve 7-10 is connected, and the oxygen in the oxygen buffer tank 8 enters the second adsorption tower 7-12. The injected oxygen increases the release of nitrogen in the second adsorption tower 7-12, thus completing the cleaning of the second adsorption tower 7-12.

[0031] Step 10: Pneumatic valve 7-6 is connected, air enters the second adsorption tower 7-12, pneumatic valve 7-9 is connected, oxygen enters the oxygen buffer tank 8 from the second adsorption tower 7-12, pneumatic valve 7-5 is connected, oxygen enters the first adsorption tower 7-11 from the oxygen buffer tank 8, completing the cleaning of the first adsorption tower.

[0032] Step 11: The third pneumatic shuttle valve 7-3 is connected, and the oxygen in the first adsorption tower 7-11 flows to the second adsorption tower 7-12.

[0033] Step 12: The second pneumatic shuttle valve 7-2 is connected, and nitrogen gas is discharged from the upper part of the first adsorption tower 7-11. The nitrogen gas is discharged from the oxygen generator through the first vent valve 7-13; the tenth pneumatic shuttle valve 7-10 is connected, and the oxygen in the oxygen buffer tank 8 enters the second adsorption tower 7-12.

[0034] Step 14: Pneumatic valve 7-1 is connected, air enters the first adsorption tower 7-11, increasing the pressure of the first adsorption tower. Pneumatic valve 7-7 is connected, nitrogen is discharged from the second adsorption tower 7-12 to the oxygen generator. Pneumatic valve 7-5 is connected, oxygen enters the first adsorption tower 7-11 from the oxygen buffer tank 8, increasing the pressure of the first adsorption tower.

[0035] Steps 14, 16, and 18 are operated in the same way: the sixth pneumatic shuttle valve 7-6 is connected, air enters the upper part of the second adsorption tower 7-12, the second pneumatic shuttle valve 7-2 is connected, nitrogen exits the upper part of the first adsorption tower 7-11, and the nitrogen is discharged from the oxygen generator through the first vent valve 7-13; the tenth pneumatic shuttle valve 7-10 is connected, and oxygen is supplied to the oxygen buffer tank 8 from the lower part of the second adsorption tower 7-12.

[0036] Steps 15, 17, and 19 are operated identically: the sixth pneumatic shuttle valve 7-6 is connected, and air enters the upper part of the second adsorption tower 7-12; the second pneumatic shuttle valve 7-2 is connected, and nitrogen exits from the upper part of the first adsorption tower 7-11, and the nitrogen is discharged from the oxygen generator through the first vent valve 7-13; the tenth pneumatic shuttle valve 7-10 is connected, and oxygen is supplied from the lower part of the second adsorption tower 7-12 to the oxygen buffer tank 8; the fifth pneumatic shuttle valve 7-5 is connected, and oxygen from the oxygen buffer tank 8 enters the first adsorption tower 7-11, thereby increasing the release of nitrogen in the first adsorption tower 7-11 and completing the cleaning of the first adsorption tower 7-11.

[0037] Step 20: Pneumatic valve 7-1 is connected, air enters the first adsorption tower 7-11, pneumatic valve 7-4 is connected, oxygen enters the oxygen buffer tank 8 from the first adsorption tower 7-11, pneumatic valve 7-10 is connected, oxygen enters the second adsorption tower 7-12 from the oxygen buffer tank 8, completing the cleaning of the second adsorption tower 7-12.

[0038] Regulations require that the output pressure of the oxygen generation system supplying oxygen to the hospital must be above 0.4 MPa. The oxygen generation system continuously produces oxygen at the rated output and stores it in oxygen storage tank 9. If the hospital's oxygen consumption is lower than the rated output, the pressure in oxygen storage tank 9 will rise. Therefore, when the pressure in oxygen storage tank 9 is relatively high, such as when it is set at 0.6 MPa, the entire system can be shut down, and oxygen can be produced externally by oxygen storage tank 9 to save energy. When the pressure in oxygen storage tank 9 drops to close to 0.4 MPa, the oxygen generation system will restart.

[0039] The air source and pretreatment module provides clean compressed air to the oxygen generation module. The oxygen generated by the oxygen generation module is first stored in the oxygen buffer tank 8. The oxygen enters the oxygen buffer tank 8 through the pressure difference between the first and second adsorption towers and the oxygen buffer tank 8, and then enters the oxygen storage tank 9 through the pressure difference between the oxygen buffer tank 8 and the oxygen storage tank 9.

[0040] During the feeding and oxygen production stages and during the cleaning and oxygen production stages, the oxygen buffer tank 8 is directly connected to the first or second adsorption tower. The pressure of the oxygen buffer tank 8 is slightly lower than that of the adsorption tower. Through the pressure difference, oxygen enters the oxygen buffer tank 8. When the pressure of the oxygen buffer tank 8 is higher than that of the oxygen storage tank 9, oxygen enters the oxygen storage tank 9 through the pressure difference.

[0041] The flow rate through the pipeline depends on the pressure difference between the two ends of the pipeline (the flow restriction in the pipeline is temporarily ignored). For specific values, please refer to Table 2.

[0042] Table 2. Flow rates of DN15 stainless steel pipes under different pressures.

[0043] Extensive experiments have shown that in existing oxygen generation systems, the output flow rate of the oxygen buffer tank 8 affects the oxygen concentration produced by the oxygen generation module, rather than the output flow rate of the oxygen storage and production module. This is mainly because the oxygen produced by the oxygen generation module and the oxygen buffer tank 8 constitute an independent system, and the oxygen buffer flow rate directly affects the oxygen concentration produced by the oxygen generation module.

[0044] The pressure inside the oxygen buffer tank 8 is always in a fluctuating state, changing between 0.45Mpa and 0.65Mpa, following the pressure of the oxygen generation system.

[0045] A throttling valve and a flow meter are installed between oxygen buffer tank 8 and oxygen storage tank 9. The throttling valve is used to regulate the flow rate between oxygen buffer tank 8 and oxygen storage tank 9, and the flow meter is used to record the instantaneous flow rate and cumulative flow rate. The cumulative flow rate is calculated as follows: in, Indicates a certain period of time t The cumulative flow rate through this section of the pipeline. This indicates the flow rate through the pipe at a given instant. Unable to be represented as t The exact or approximate function can be used to calculate the cumulative flow by calculating the area of ​​the flow curve recorded by the flow meter.

[0046] like Figure 3 As shown, cumulative traffic The area enclosed by the red part can be calculated by exporting the data to determine the flow rate within that time period. The oxygen produced is not 100% pure oxygen; it is oxygen-enriched air with a concentration of over 93%. To ensure the stability of the entire system, the flow rate needs to be at its maximum while maintaining the correct oxygen concentration.

[0047] in, This represents the total amount of oxygen produced within a certain time period. C This indicates the oxygen concentration in oxygen-rich air. This represents the total volume of oxygen-enriched air. According to YY 0298-1998 General Technical Specification for Medical Molecular Sieve Oxygen Generators, the oxygen concentration of oxygen-enriched air is 93%±3, that is, between 90% and 96%, based on the following formula: It can be seen that, C 1 and C 2 Within the range of 93% ± 3. C 1 and Q 1 These represent the oxygen concentration and total flow rate entering oxygen buffer tank 8 per unit time, respectively. C 2 and Q 2 These represent the oxygen concentration and total flow rate discharged from oxygen buffer tank 8 per unit time, respectively.

[0048] The above formula can only be used for qualitative analysis because the concentration value in the actual oxygen production process varies. C With oxygen volume V It is constantly changing, making quantitative analysis impossible; therefore, only approximate analysis is possible. in, V 1 This indicates the total volume of oxygen entering oxygen buffer tank 8 per unit time. V 2 This indicates the total volume of oxygen discharged from oxygen buffer tank 8 per unit time.

[0049] Therefore, it can be concluded that, within the scope of regulatory requirements, to minimize the oxygen concentration produced by oxygen buffer tank 8, the concentration of oxygen-enriched air entering oxygen buffer tank 8 needs to be as high as possible, which will maximize the oxygen concentration produced by oxygen buffer tank 8.

[0050] The maximum pressure of oxygen storage tank 9 depends on the maximum pressure of oxygen buffer tank 8, which in turn depends on the adsorption pressure of the first and second adsorption towers. The pressure of the adsorption towers can be controlled by increasing the gas intake time. Since the pressure of oxygen buffer tank 8 is basically equal to the pressure of the adsorption towers, the pressure difference between oxygen buffer tank 8 and oxygen storage tank 9 can be controlled by controlling the gas intake time.

[0051] In summary, the method for increasing the pressure of an oxygen storage tank in a medical oxygen generation system provided in this application includes: First, adjust the throttle valve so that the cumulative flow rate produced by oxygen buffer tank 8 is approximately 1.2 liters per hour. Q -1.3 Q For specific adjustment methods, the cumulative flow can be obtained by referring to the area method.Q This refers to the rated flow rate of the oxygen generation system.

[0052] When the oxygen generation system starts, it first detects the oxygen concentration. When the concentration is below 90%, it executes the first sequence of events, which can make the produced oxygen concentration reach above 90%. Because it is an air exhaust, it does not involve pressure changes in the oxygen storage tank 9. When the concentration reaches above 90%, it proceeds to the next step.

[0053] This embodiment uses a rated flow rate of 20m³ / h. 3 Let's take / h as an example: The pressure of oxygen storage tank 9 is monitored. When the pressure of oxygen storage tank 9 is within the range of 0.42 MPa to 0.49 MPa, the system executes the second timing sequence. This timing sequence increases the intake time so that the maximum pressure of oxygen buffer tank 8 reaches 0.55 MPa. Due to the presence of the throttle valve, the maximum oxygen flow rate from oxygen buffer tank 8 to oxygen storage tank 9 at this time is 28 m³ / s. 3 / h, the pressure in oxygen storage tank 9 can reach 0.49-0.5Mpa, at which point the oxygen concentration is about 94%; The pressure of oxygen storage tank 9 is monitored. When the pressure of oxygen storage tank 9 is within the range of 0.5 MPa to 0.53 MPa, the system executes the third timing sequence. This timing sequence increases the intake time so that the maximum pressure of oxygen buffer tank 8 reaches 0.6 MPa. Due to the presence of the throttle valve, the maximum oxygen flow rate from oxygen buffer tank 8 to oxygen storage tank 9 at this time is 35 m³ / s. 3 / h, the pressure in oxygen storage tank 9 can reach 0.53-0.54 MPa, at which point the oxygen concentration is about 92%; The pressure of oxygen storage tank 9 is monitored. When the pressure of oxygen storage tank 9 is within the range of 0.54 MPa to 0.57 MPa, the system executes the fourth timing sequence. This timing sequence increases the intake time so that the maximum pressure of oxygen buffer tank 8 reaches 0.7 MPa. Due to the presence of the throttle valve, the maximum oxygen flow rate from oxygen buffer tank 8 to oxygen storage tank 9 at this time is 40 m³ / s. 3 / h, the pressure in oxygen storage tank 9 can reach 0.58-0.59 MPa, at which point the oxygen concentration is 90%; The pressure of oxygen storage tank 9 is monitored. When the pressure of oxygen storage tank 9 reaches 0.57 MPa, the oxygen generation system stops operating and enters standby mode. Oxygen storage tank 9 produces oxygen externally. When the pressure drops to 0.42 MPa, the oxygen generation system starts.

[0054] The first, second, third, and fourth time series correspond to the 20 steps of the oxygen generation system, and different time is allocated to each step. See Table 3 for the specific time allocation.

[0055] Table 3. Four time series are assigned to each step segment (unit: seconds).

[0056]

[0057] The oxygen storage tank pressure boosting method provided in this application can ensure the oxygen concentration in the oxygen storage tank simply by adjusting the execution time of each step of the oxygen generation module, without the need for an additional oxygen booster and saving energy.

[0058] This application also provides a medical oxygen generation system that uses the above-described method to increase the pressure of an oxygen storage tank.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application do not depart from the spirit and scope of the technical solutions of this application, and should all be covered within the scope of the claims of this application.

Claims

1. A method for increasing the pressure of an oxygen storage tank in a medical oxygen generation system, comprising: When the oxygen generation system starts up, if the oxygen concentration is lower than the first set concentration, the first set of set timing sequences will be executed; When the oxygen concentration reaches the first set concentration, the pressure of the oxygen storage tank is continuously monitored. When the pressure in the oxygen storage tank is within the second set pressure range, the oxygen generation system executes the second set of set timing sequences. When the pressure of the oxygen storage tank is within the third set pressure range, the oxygen generation system executes the third set of set timing sequences. When the pressure of the oxygen storage tank is within the fourth set pressure range, the oxygen generation system executes the fourth set of set timing sequences. When the pressure in the oxygen storage tank reaches the first set pressure value, the oxygen generation system stops operating and enters standby mode. When the pressure in the oxygen storage tank drops to the second set pressure value, the oxygen generation system starts.

2. The method for increasing the pressure of the oxygen storage tank in a medical oxygen generation system according to claim 1, characterized in that, The first set concentration is 90%.

3. The method for increasing the pressure of the oxygen storage tank in a medical oxygen generation system according to claim 1, characterized in that, The execution time of each step in the first set of timing parameters is: Step 1: 6 seconds; Step 2: 1 second; Step 3: 0 seconds; Step 4: 11-13 seconds; Step 5: 3-5 seconds; Step 6: 2-4 seconds; Step 7: 3-5 seconds; Step 8: 3-5 seconds; Step 9: 3-5 seconds; Step 10: 1 second; Step 11: 6 seconds; Step 12: 1 second; Step 13: 0 seconds; Step 14: 11-13 seconds; Step 15: 3-5 seconds; Step 16: 2-4 seconds; Step 17: 3-5 seconds; Step 18: 3-5 seconds; Step 19: 3-5 seconds; Step 20: 1 second.

4. The method for increasing the pressure of the oxygen storage tank in a medical oxygen generation system according to claim 1, characterized in that, The second set pressure range is 0.42 MPa - 0.49 MPa; The execution time of each step in the second set of timing settings is: Step 1: 6 seconds; Step 2: 1 second; Step 3: 0 seconds; Step 4: 13-15 seconds; Step 5: 3-5 seconds; Step 6: 3-5 seconds; Step 7: 3-5 seconds; Step 8: 4-6 seconds; Step 9: 3-5 seconds; Step 10: 1 second; Step 11: 6 seconds; Step 12: 1 second; Step 13: 0 seconds; Step 14: 13-15 seconds; Step 15: 3-5 seconds; Step 16: 3-5 seconds; Step 17: 3-5 seconds; Step 18: 4-6 seconds; Step 19: 3-5 seconds; Step 20: 1 second.

5. The method for increasing the pressure of the oxygen storage tank in a medical oxygen generation system according to claim 1, characterized in that, The third set pressure range is 0.5 MPa - 0.53 MPa; The execution time of each segment of the third set of timing settings is: Step 1: 6 seconds; Step 2: 1 second; Step 3: 0 seconds; Step 4: 15-17 seconds; Step 5: 4-6 seconds; Step 6: 4-6 seconds; Step 7: 3-5 seconds; Step 8: 6-8 seconds; Step 9: 3-5 seconds; Step 10: 1 second; Step 11: 6 seconds; Step 12: 1 second; Step 13: 0 seconds; Step 14: 15-17 seconds; Step 15: 4-6 seconds; Step 16: 4-6 seconds; Step 17: 3-5 seconds; Step 18: 6-8 seconds; Step 19: 3-5 seconds; Step 20: 1 second.

6. The method for increasing the pressure of the oxygen storage tank in a medical oxygen generation system according to claim 1, characterized in that, The fourth set pressure range is 0.54 MPa - 0.57 MPa; The execution time of each step in the fourth set of timing settings is: Step 1: 6 seconds; Step 2: 1 second; Step 3: 0 seconds; Step 4: 17-19 seconds; Step 5: 4-6 seconds; Step 6: 6-8 seconds; Step 7: 5-6 seconds; Step 8: 8-10 seconds; Step 9: 3-5 seconds; Step 10: 1 second; Step 11: 6 seconds; Step 12: 1 second; Step 13: 0 seconds; Step 14: 17-19 seconds; Step 15: 4-6 seconds; Step 16: 6-8 seconds; Step 17: 5-6 seconds; Step 18: 8-10 seconds; Step 19: 3-5 seconds; Step 20: 1 second.

7. The method for increasing the pressure of the oxygen storage tank in a medical oxygen generation system according to claim 1, characterized in that, The first set pressure value is 0.57 MPa; the second set pressure value is 0.42 MPa.

8. The method for increasing the pressure of the oxygen storage tank in a medical oxygen generation system according to claim 1, characterized in that, Also includes: Before starting the oxygen generation system, adjust the cumulative hourly flow rate of the oxygen buffer tank to 1.

2. Q -1.3 Q ;in, Q This refers to the rated flow rate of the oxygen generation system.

9. A medical oxygen generation system, wherein the pressure of an oxygen storage tank is increased using the method described in any one of claims 1-8.

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