Mobile oxygen supply device and control method

Abstract

The present application relates to the technical field of mobile oxygen supply, and particularly relates to a mobile oxygen supply device and a control method. The mobile oxygen supply device comprises an oxygen generator, a liquid oxygen bottle, a vaporizer and an oxygen cylinder. The output port of the oxygen generator is connected to a gas using end through a pipeline, the output port of the liquid oxygen bottle is connected to the gas using end through a pipeline, the vaporizer is arranged on the pipeline between the output port of the liquid oxygen bottle and the gas using end, and the output port of the oxygen cylinder is connected to the gas using end through a pipeline. The control method comprises the following modes: an oxygen priority mode, in which when the input oxygen flow gradually increases, the oxygen supply flow is increased by sequentially adding the oxygen generator, the oxygen cylinder and the liquid oxygen bottle in order; a liquid oxygen priority mode, in which when the input oxygen flow gradually increases, the oxygen supply flow is increased by sequentially adding the oxygen generator, the liquid oxygen bottle and the oxygen cylinder in order; and a fault mode, in which when the oxygen generator fails, the oxygen cylinder storage is insufficient or the liquid oxygen bottle storage is insufficient, the oxygen source with the fault or the insufficient storage is closed, and the remaining oxygen sources are opened.

Description

Technical Field

[0001] This invention relates to the field of mobile oxygen supply technology, and in particular to a mobile oxygen supply device and control method. Background Technology

[0002] Mobile oxygen supply devices are flexible deployment devices suitable for various scenarios, meeting oxygen needs in different situations such as medical treatment, high-altitude operations, and outdoor travel. Existing small vehicle-mounted mobile oxygen supply devices, due to space and weight limitations, can only meet small-flow oxygen supply needs and cannot meet temporary large-flow oxygen supply needs, nor do they have crisis response mechanisms for emergencies. Summary of the Invention

[0003] One object of the present invention is to provide a mobile oxygen supply device that can meet the temporary demand for high-flow oxygen supply and reduce the possibility of oxygen supply failure.

[0004] To achieve this objective, the present invention adopts the following technical solution: A mobile oxygen supply device is provided, comprising: An oxygen generator, wherein the output port of the oxygen generator is connected to the gas-consuming end via a pipeline; A liquid oxygen cylinder, the outlet of which is connected to the gas-consuming end via a pipeline; A vaporizer is installed on the pipeline between the outlet of the liquid oxygen cylinder and the gas-using end; An oxygen cylinder, the outlet of which is connected to the gas-using end via a pipeline.

[0005] Optionally, the mobile oxygen supply device further includes a first buffer tank, the inlet of which can be connected to the outlet of the oxygen generator and the outlet of the vaporizer, and the outlet of the first buffer tank can be connected to the gas-consuming end.

[0006] Optionally, the mobile oxygen supply device further includes a booster compressor, the input port of which can be connected to the output port of the oxygen generator and the output port of the vaporizer, and the output port of the booster compressor can be connected to the input port of the first buffer tank.

[0007] Optionally, the mobile oxygen supply device further includes a first branch, a second branch, and a first combined pipeline. One end of the first branch is connected to the output port of the oxygen generator, and the other end is connected to one end of the first combined pipeline. One end of the second branch is connected to the output port of the vaporizer, and the other end is connected to one end of the first combined pipeline. The booster and the first buffer tank are both located on the first combined pipeline.

[0008] Optionally, the mobile oxygen supply device further includes a first control valve, which is disposed on the first branch. And / or, the mobile oxygen supply device further includes a second control valve, which is disposed on the second branch; And / or, the mobile oxygen supply device further includes a third control valve, which is disposed on the first merging pipeline and is located downstream of the first buffer tank; And / or, the mobile oxygen supply device further includes a first pressure sensor for detecting the gas pressure inside the first buffer tank.

[0009] Optionally, the mobile oxygen supply device further includes a third branch and a second combined pipeline. One end of the third branch is connected to the output port of the oxygen cylinder, and the other end is connected to the first combined pipeline and to one end of the second combined pipeline. The other end of the second combined pipeline is connected to the gas-consuming end.

[0010] Optionally, the mobile oxygen supply device further includes a fourth control valve, which is disposed on the third branch; And / or, the mobile oxygen supply device further includes a first pressure reducing valve, which is disposed on the third branch; And / or, the mobile oxygen supply device further includes a second pressure reducing valve and a second pressure sensor, the second pressure reducing valve being disposed on the second merging pipeline, and the second pressure sensor being used to detect the gas pressure in the second merging pipeline downstream of the second pressure reducing valve.

[0011] Another objective of this invention is to provide a control method that can meet temporary high-flow oxygen supply demands and reduce the possibility of oxygen supply failure.

[0012] To achieve this objective, the present invention adopts the following technical solution: A control method is provided for use in the aforementioned mobile oxygen supply device, the control method comprising the following modes: Oxygen priority mode: When the input oxygen flow rate gradually increases, the oxygen generator, the oxygen cylinder and the liquid oxygen cylinder are turned on in sequence to increase the oxygen supply flow rate. Liquid oxygen priority mode: When the input oxygen flow rate gradually increases, the oxygen generator, liquid oxygen cylinder and oxygen cylinder are turned on in sequence to increase the oxygen supply flow rate. Fault mode: When the oxygen generator malfunctions, the oxygen cylinder has insufficient storage, or the liquid oxygen cylinder has insufficient storage, the malfunctioning or insufficient oxygen source is shut down, and the remaining oxygen sources are turned on.

[0013] Optionally, in the oxygen priority mode, when the input oxygen flow rate is less than or equal to the maximum gas production flow rate of the oxygen generator, the demand condition is determined, and if it is, only the oxygen generator is turned on to supply oxygen. When the input oxygen flow rate increases to a level greater than the maximum gas production flow rate of the oxygen generator, and the input oxygen flow rate is less than or equal to the sum of the maximum gas production flow rate of the oxygen generator and the maximum oxygen supply flow rate of the oxygen cylinder, the oxygen generator remains on and the oxygen cylinder is turned on to supply oxygen together. When the input oxygen flow rate increases to a level greater than the sum of the maximum gas production flow rate of the oxygen generator and the maximum oxygen supply flow rate of the oxygen cylinder, the oxygen generator and the oxygen cylinder remain on, and the liquid oxygen cylinder is turned on to supply oxygen together.

[0014] Optionally, the requirement condition is to determine whether either the first condition or the second condition is met. The first condition is that the gas pressure at the gas-using end is lower than the preset pressure and the gas pressure in the first buffer tank is less than the upper limit threshold. The second condition is that the gas pressure in the first buffer tank is less than or equal to the lower limit threshold. And / or, the oxygen output from the first buffer tank and the oxygen output from the oxygen cylinder are combined and reach the gas consumption end. The oxygen priority mode further includes the following steps: when the gas pressure of the first buffer tank reaches the upper limit threshold, it is determined whether the liquid oxygen cylinder is open. If so, the oxygen output flow rate of the liquid oxygen cylinder is reduced by a first preset value, and the process is waited for a first preset time. Then, it is determined again whether the gas pressure of the first buffer tank reaches the upper limit threshold. If so, the oxygen output flow rate of the liquid oxygen cylinder is reduced by the first preset value again until the liquid oxygen cylinder is turned off. Then, it is determined again whether the gas pressure of the first buffer tank reaches the upper limit threshold. If so, the oxygen generator is turned off.

[0015] The beneficial effects of this invention are: This invention provides a mobile oxygen supply device, including an oxygen generator, a liquid oxygen cylinder, a vaporizer, and an oxygen cylinder. The output port of the oxygen generator is connected to the gas-consuming end via a pipeline, the output port of the liquid oxygen cylinder is connected to the gas-consuming end via a pipeline, the vaporizer is installed on the pipeline between the output port of the liquid oxygen cylinder and the gas-consuming end, and the output port of the oxygen cylinder is connected to the gas-consuming end via a pipeline. This mobile oxygen supply device has three oxygen sources: an oxygen generator, a liquid oxygen cylinder, and an oxygen cylinder. The vaporizer can convert liquid oxygen into a gaseous state. When two or all three oxygen sources are used simultaneously, the instantaneous flow rate of oxygen supply can be greatly increased, meeting temporary high-flow oxygen supply needs. Furthermore, in the event of a malfunction in the oxygen generator, insufficient liquid oxygen cylinder storage, or insufficient oxygen cylinder storage, the other two oxygen sources can be activated, reducing the possibility of oxygen supply failure and ensuring the stability of the oxygen supply.

[0016] This invention also provides a control method applied to the aforementioned mobile oxygen supply device. The control method includes the following modes: Oxygen priority mode: as the input oxygen flow rate gradually increases, the oxygen generator, oxygen cylinder, and liquid oxygen cylinder are sequentially activated to increase the oxygen supply flow rate; Liquid oxygen priority mode: as the input oxygen flow rate gradually increases, the oxygen generator, liquid oxygen cylinder, and oxygen cylinder are sequentially activated to increase the oxygen supply flow rate; Fault mode: when the oxygen generator malfunctions, the oxygen cylinder has insufficient storage, or the liquid oxygen cylinder has insufficient storage, the malfunctioning or insufficient oxygen source is shut down, and the remaining oxygen sources are activated. The aforementioned mobile oxygen supply device, using this control method, can meet temporary high-flow oxygen supply needs and stably respond to emergencies. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the mobile oxygen supply device provided in the embodiment of the present invention; Figure 2 This is a flowchart illustrating the control method provided in an embodiment of the present invention.

[0018] In the picture: 1. Oxygen generator; 2. Liquid oxygen cylinder; 3. Vaporizer; 4. Oxygen cylinder; 5. First buffer tank; 6. Booster; 7. First branch; 8. Second branch; 9. First merging pipeline; 10. First control valve; 11. Second control valve; 12. Third control valve; 13. First pressure sensor; 14. Third branch; 15. Second merging pipeline; 16. Fourth control valve; 17. First pressure reducing valve; 18. Second pressure reducing valve; 19. Second pressure sensor; 20. First check valve; 21. Second check valve; 22. Third check valve; 23. First exhaust valve; 24. Second exhaust valve; 25. Third exhaust valve; 26. Second buffer tank; 27. First safety valve; 28. Second safety valve; 100. Gas end. Detailed Implementation

[0019] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present invention are shown in the accompanying drawings, not all of them.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] Mobile oxygen supply devices are flexible deployment devices suitable for various scenarios, meeting oxygen needs in different situations such as medical treatment, high-altitude operations, and outdoor travel. Existing small vehicle-mounted mobile oxygen supply devices, due to space and weight limitations, can only meet small-flow oxygen supply needs and cannot meet temporary large-flow oxygen supply needs, nor do they have crisis response mechanisms for emergencies.

[0023] Therefore, this embodiment provides a mobile oxygen supply device to solve the above problems. The mobile oxygen supply device can meet the temporary demand for high-flow oxygen supply and reduce the possibility of oxygen supply failure.

[0024] like Figure 1 As shown, the mobile oxygen supply device in this embodiment includes an oxygen generator 1, a liquid oxygen cylinder 2, a vaporizer 3, and an oxygen cylinder 4. The output port of the oxygen generator 1 is connected to the gas-consuming end 100 via a pipeline, the output port of the liquid oxygen cylinder 2 is connected to the gas-consuming end 100 via a pipeline, the vaporizer 3 is installed on the pipeline between the output port of the liquid oxygen cylinder 2 and the gas-consuming end 100, and the output port of the oxygen cylinder 4 is connected to the gas-consuming end 100 via a pipeline. This mobile oxygen supply device has three oxygen sources: the oxygen generator 1, the liquid oxygen cylinder 2, and the oxygen cylinder 4. The vaporizer 3 can convert liquid oxygen into a gaseous state. When two or all three oxygen sources are used simultaneously, the instantaneous flow rate of oxygen supply can be greatly increased, meeting temporary high-flow oxygen supply needs. Furthermore, if the oxygen generator 1 malfunctions, or the liquid oxygen cylinder 2 or the oxygen cylinder 4 is insufficient, the other two oxygen sources can be activated, reducing the possibility of oxygen supply failure and ensuring the stability of the oxygen supply.

[0025] To improve the stability of oxygen supply from oxygen generator 1 and liquid oxygen cylinder 2 and reduce fluctuations in oxygen supply flow, the mobile oxygen supply device may optionally include a first buffer tank 5. The inlet of the first buffer tank 5 can be connected to the outlet of oxygen generator 1 and the outlet of vaporizer 3, and the outlet of the first buffer tank 5 can be connected to the gas consumption end 100.

[0026] Since the oxygen supply pressure of oxygen generator 1 and liquid oxygen cylinder 2 may be insufficient, in order to ensure that the oxygen supply flows smoothly into the first buffer tank 5, the mobile oxygen supply device may optionally include a booster 6. The input port of booster 6 can be connected to the output port of oxygen generator 1 and the output port of vaporizer 3, and the output port of booster 6 can be connected to the input port of first buffer tank 5.

[0027] Optionally, in this embodiment, the mobile oxygen supply device further includes a first branch 7, a second branch 8, and a first merging pipeline 9. One end of the first branch 7 is connected to the output port of the oxygen generator 1, and the other end is connected to one end of the first merging pipeline 9. One end of the second branch 8 is connected to the output port of the vaporizer 3, and the other end is connected to one end of the first merging pipeline 9. The booster 6 and the first buffer tank 5 are both located on the first merging pipeline 9. That is, the oxygen output from the oxygen generator 1 flows through the first branch 7, and the oxygen from the liquid oxygen cylinder 2 after vaporization flows through the second branch 8. The oxygen from the two branches merges in the first merging pipeline 9, and then flows sequentially through the booster 6 and the first buffer tank 5.

[0028] Optionally, the mobile oxygen supply device also includes a first control valve 10, which is installed on the first branch 7 to control the flow rate of oxygen output by the oxygen generator 1.

[0029] Optionally, the mobile oxygen supply device also includes a second control valve 11, which is installed on the second branch 8 to control the flow rate of oxygen output from the liquid oxygen cylinder 2 after vaporization.

[0030] Optionally, the mobile oxygen supply device also includes a third control valve 12, which is installed on the first merging pipeline 9 and located downstream of the first buffer tank 5, thereby controlling the flow rate of oxygen output from the first buffer tank 5.

[0031] Optionally, the mobile oxygen supply device also includes a first pressure sensor 13, which is used to detect the gas pressure in the first buffer tank 5. The oxygen storage in the first buffer tank 5 can be determined by the gas pressure. If the pressure in the first buffer tank 5 is too low, the oxygen generator 1 or liquid oxygen cylinder 2 needs to be turned on, or the oxygen generation power of the oxygen generator 1 needs to be increased, or the valve opening of the liquid oxygen cylinder 2 needs to be increased to continuously store oxygen in the first buffer tank 5. If the pressure in the first buffer tank 5 is too high, the oxygen generator 1 or liquid oxygen cylinder 2 needs to be turned off, or the oxygen generation power of the oxygen generator 1 needs to be reduced, or the valve opening of the liquid oxygen cylinder 2 needs to be reduced to suspend or reduce the oxygen supply to the first buffer tank 5.

[0032] Optionally, the mobile oxygen supply device further includes a third branch 14 and a second merging pipeline 15. One end of the third branch 14 is connected to the output port of the oxygen cylinder 4, and the other end is connected to the first merging pipeline 9 and to one end of the second merging pipeline 15. The other end of the second merging pipeline 15 is connected to the gas-consuming end 100. That is, the oxygen cylinder 4 can directly supply oxygen to the gas-consuming end 100, or it can be combined with the oxygen in the first merging pipeline 9 and jointly supplied to the gas-consuming end 100.

[0033] Optionally, the mobile oxygen supply device also includes a fourth control valve 16, which is located on the third branch 14 and can control the flow rate of oxygen output from the oxygen cylinder 4.

[0034] Optionally, the mobile oxygen supply device also includes a first pressure reducing valve 17, which is installed on the third branch 14. The first pressure reducing valve 17 can reduce the pressure of the oxygen output from the oxygen cylinder 4 once to ensure that the output oxygen has a suitable pressure and avoid excessive pressure from injuring the user at the gas consumption end 100.

[0035] Optionally, the mobile oxygen supply device also includes a second pressure reducing valve 18 and a second pressure sensor 19. The second pressure reducing valve 18 is installed on the second merging pipeline 15 and can reduce the pressure of the final oxygen supply to ensure that the final output oxygen has a suitable pressure, thus ensuring the safety and comfort of the user's oxygen use.

[0036] Optionally, the second pressure sensor 19 is used to detect the gas pressure in the second merging pipeline 15 downstream of the second pressure reducing valve 18. On the one hand, the second pressure reducing valve 18 can be adjusted according to the gas pressure here, and on the other hand, the gas pressure here can be used to understand whether the demand of the gas user 100 and the oxygen supply at the oxygen supply end are balanced.

[0037] Optionally, the mobile oxygen supply device also includes a second buffer tank 26, which is located on the second branch 8 and between the vaporizer 3 and the second control valve 11, and can store and buffer the gas output after the liquid oxygen cylinder 2 is vaporized.

[0038] Optionally, the mobile oxygen supply device further includes a first one-way valve 20, a second one-way valve 21, and a third one-way valve 22. The first one-way valve 20 is disposed on the first branch 7, the second one-way valve 21 is disposed on the second branch 8, and the third one-way valve 22 is disposed on the third branch 14, so as to ensure that the gas in the first branch 7, the second branch 8, and the third branch 14 all flow from the gas source toward the gas consumption end 100.

[0039] Optionally, the mobile oxygen supply device also includes a first exhaust valve 23. One end of the pipeline containing the first exhaust valve 23 is connected to the first branch 7 and is located between the first control valve 10 and the first one-way valve 20. The gas output from the oxygen generator 1 can be discharged from the pipeline through the first exhaust valve 23. This allows the gas to be discharged when the oxygen output flow is unstable or other problems occur, and then the gas can be delivered to the gas-consuming end 100 when the flow stabilizes.

[0040] Optionally, the mobile oxygen supply device also includes a second exhaust valve 24. One end of the pipeline containing the second exhaust valve 24 is connected to the second branch 8 and is located between the second buffer tank 26 and the second control valve 11. The gas output from the liquid oxygen cylinder 2 can be discharged from the pipeline through the second exhaust valve 24.

[0041] Optionally, the mobile oxygen supply device also includes a third exhaust valve 25. One end of the pipeline where the third exhaust valve 25 is located is connected to the third branch 14 and is located between the fourth control valve 16 and the third check valve 22. The gas output from the oxygen cylinder 4 can be discharged from the pipeline through the third exhaust valve 25.

[0042] Optionally, the mobile oxygen supply device also includes a first safety valve 27, which is installed on the first buffer tank 5 and can release gas to reduce pressure when the gas pressure in the first buffer tank 5 is too high.

[0043] Optionally, the mobile oxygen supply device also includes a second safety valve 28, which is disposed on the second buffer tank 26 and can release gas to reduce pressure when the gas pressure in the second buffer tank 26 is too high.

[0044] Optionally, the first control valve 10, the second control valve 11, the third control valve 12, and the fourth control valve 16 are all electrically controlled valves, which can ensure control accuracy and facilitate automated control. Optionally, in this embodiment, the mobile oxygen supply device also includes a controller, and the first control valve 10, the second control valve 11, the third control valve 12, the fourth control valve 16, the first pressure sensor 13, the second pressure sensor 19, the first pressure reducing valve 17, and the second pressure reducing valve 18 are all communicatively connected to the controller. Optionally, in this embodiment, the mobile oxygen supply device also includes a display screen communicatively connected to the controller. The display screen can input the required oxygen flow rate, select different flow modes such as large, medium, and small, and increase or decrease the flow rate. The controller can adjust whether each control valve is open and regulate the opening degree of the control valves according to the required oxygen flow rate (i.e., the input oxygen flow rate) displayed on the display screen. It can also adjust whether each control valve is open and regulate the opening degree of the control valves according to the detection result of the first pressure sensor 13, and determine whether the actual oxygen flow rate is sufficient according to the detection result of the second pressure sensor 19, thereby adjusting whether each control valve is open and regulating the opening degree of the control valves in a timely manner.

[0045] The controller can be an Omron CP1E-N30DT-D model or an Aitori O2-Controller Pro model, etc., and there is no limitation. Of course, in other embodiments, mechanical control valves can also be set, and the opening degree of each control valve can be manually adjusted to regulate the oxygen supply flow.

[0046] Optionally, the oxygen generator 1 in this embodiment is a common small oxygen generator, the specific structure of which will not be described in detail. The booster 6 is a compact, oil-free, low-noise booster 6, which is a mature technology, and its specific structure will not be described in detail. In addition, the electronically controlled valve, the pressure reducing valve, and the pressure sensor are all mature technologies, and their specific structures will not be described in detail. The pipeline used in this mobile oxygen supply device is a sterile pipeline. Optionally, in some embodiments, a filter can be added to the gas consumption end 100 to further ensure user safety.

[0047] like Figure 2 As shown, the present invention also provides a control method applied to the aforementioned mobile oxygen supply device. The control method includes an oxygen priority mode, a liquid oxygen priority mode, and a fault mode. In the oxygen priority mode, as the input oxygen flow rate gradually increases, the oxygen generator 1, oxygen cylinder 4, and liquid oxygen cylinder 2 are sequentially activated to increase the oxygen supply flow rate. In the liquid oxygen priority mode, as the input oxygen flow rate gradually increases, the oxygen generator 1, liquid oxygen cylinder 2, and oxygen cylinder 4 are sequentially activated to increase the oxygen supply flow rate. In the fault mode, when the oxygen generator 1 malfunctions, oxygen cylinder 4 has insufficient storage, or liquid oxygen cylinder 2 has insufficient storage, the malfunctioning or insufficient oxygen source is shut down, and the remaining oxygen sources are activated.

[0048] The following section uses the oxygen priority mode as an example to illustrate the specific control steps in this mode.

[0049] Optionally, you can first roughly determine how many oxygen sources need to be turned on based on the input oxygen flow rate, and make corresponding adjustments when the oxygen demand increases.

[0050] Specifically, when the input oxygen flow rate is less than or equal to the maximum gas production flow rate of oxygen generator 1, the demand condition is determined. If the condition is met, only oxygen generator 1 is turned on to supply oxygen. At this time, only oxygen generator 1 needs to be turned on to meet the oxygen demand. However, before turning it on, the gas pressure at the first buffer tank 5 also needs to be determined.

[0051] Optionally, the requirement condition is to determine whether either the first condition or the second condition is met. That is, oxygen generator 1 needs to be turned on in all three cases: when the first condition is met and the second condition is not met, when the second condition is met and the first condition is not met, and when both the first and second conditions are met. Oxygen generator 1 does not need to be turned on only when neither the first nor the second condition is met.

[0052] Optionally, the first condition is that the air pressure at the gas consumption end 100 is lower than the preset pressure and the air pressure in the first buffer tank 5 is lower than the upper limit threshold. That is, the actual oxygen flow rate may increase instantaneously, and the air pressure at the gas consumption end 100 is already low. It is necessary to quickly increase the amount of oxygen in the first buffer tank 5, so the oxygen generator 1 needs to be turned on. If the air pressure at the gas consumption end 100 further decreases to the lowest preset pressure, it is determined that the user does not have time to adjust the input oxygen flow rate on the display screen, but the actual oxygen flow rate increases urgently. At this time, the oxygen cylinder 4 is turned on to ensure that the air pressure at the gas consumption end 100 is normal. Normally, an abnormal signal is displayed on the display screen to ask the user whether to increase the input oxygen flow rate.

[0053] Of course, "turning on oxygen generator 1" here refers not only to the oxygen generator 1 itself being turned on, but also to the control valves and other components on the branch and combined pipelines where oxygen generator 1 is located, namely, the first control valve 10, the booster 6, and the third control valve 12, to ensure that the oxygen output from oxygen generator 1 can be delivered to the gas consumption end 100. Similarly, "turning on oxygen cylinder 4" here refers to the oxygen cylinder 4 itself being turned on, and also to the control valves and other components on the branch and combined pipelines where oxygen cylinder 4 is located, namely, the fourth control valve 16, to ensure that the oxygen output from oxygen cylinder 4 can be delivered to the gas consumption end 100. Likewise, "turning on liquid oxygen cylinder 2" below refers to the liquid oxygen cylinder 2 itself being turned on, and also to the control valves and other components on the branch and combined pipelines where liquid oxygen cylinder 2 is located, namely, the vaporizer 3, the second control valve 11, the booster 6, and the third control valve 12, to ensure that the oxygen output from liquid oxygen cylinder 2 can be delivered to the gas consumption end 100.

[0054] Optionally, the second condition is that the air pressure in the first buffer tank 5 is less than or equal to the lower threshold. That is, when the oxygen in the first buffer tank 5 is insufficient and needs to be input, the oxygen generator 1 is turned on. After a second preset time, if the air pressure in the first buffer tank 5 is still less than or equal to the lower threshold, the power of the oxygen generator 1 is increased. After another second preset time, if the air pressure in the first buffer tank 5 is still less than or equal to the lower threshold, the power of the oxygen generator 1 is increased again until the oxygen generator 1 operates at maximum power. After a second preset time, if the air pressure in the first buffer tank 5 is still less than or equal to the lower threshold, it is determined that the user's input oxygen flow rate is less than the actual oxygen flow rate. The liquid oxygen cylinder 2 is briefly turned on until the air pressure in the first buffer tank 5 reaches the normal range, then the liquid oxygen cylinder 2 is turned off.

[0055] When the input oxygen flow rate increases to a level greater than the maximum gas production flow rate of oxygen generator 1, and the input oxygen flow rate is less than or equal to the sum of the maximum gas production flow rate of oxygen generator 1 and the maximum oxygen supply flow rate of oxygen cylinder 4, oxygen generator 1 remains on, while oxygen cylinder 4 supplies oxygen simultaneously. In other words, by activating both oxygen generator 1 and oxygen cylinder 4 as oxygen sources, the user's oxygen needs can be met according to the input oxygen flow rate.

[0056] When the input oxygen flow rate increases to a level greater than the sum of the maximum gas production flow rate of oxygen generator 1 and the maximum oxygen supply flow rate of oxygen cylinder 4, oxygen generator 1 and oxygen cylinder 4 remain on, while liquid oxygen cylinder 2 is activated to supply oxygen simultaneously. In other words, at this time, three oxygen sources—oxygen generator 1, oxygen cylinder 4, and liquid oxygen cylinder 2—need to be activated to meet the user's oxygen demand according to the input oxygen flow rate.

[0057] Of course, if there is a sudden increase in the actual oxygen flow rate during the user's oxygen use, it is necessary to judge based on the gas pressure at the gas consumption end 100 and the gas pressure in the first buffer tank 5, and temporarily increase the output flow rate of the single oxygen source, or turn on other oxygen sources to ensure the oxygen demand in emergency situations.

[0058] Of course, during continuous oxygen use, energy consumption needs to be reduced according to the actual situation, and the gas pressure at the first buffer tank 5 needs to be kept stable. Optionally, since the oxygen output from the first buffer tank 5 of this mobile oxygen supply device merges with the oxygen output from the oxygen cylinder 4 before reaching the gas consumption end 100, the oxygen priority mode also includes the following steps: When the gas pressure of the first buffer tank 5 reaches the upper limit threshold, it is determined whether the liquid oxygen cylinder 2 is open. If so, the oxygen output flow rate of the liquid oxygen cylinder 2 is reduced by a first preset value. After waiting for a first preset time, it is determined again whether the gas pressure of the first buffer tank 5 reaches the upper limit threshold. If so, the oxygen output flow rate of the liquid oxygen cylinder 2 is reduced by a first preset value until the liquid oxygen cylinder 2 is turned off. Then, it is determined again whether the gas pressure of the first buffer tank 5 reaches the upper limit threshold. If so, the oxygen generator 1 is turned off, and the first buffer tank 5 continuously supplies oxygen. When the pressure in the first buffer tank 5 drops back to the lower limit threshold, the oxygen generator 1 is turned on again to restore the oxygen supply process of the oxygen generator 1.

[0059] Optionally, in this embodiment, the first preset duration and the second preset duration are both 10 seconds, the first preset value is 20L / min, the preset pressure of the gas pressure at the gas end 100 is 0.3MPa, the upper limit threshold of the gas pressure in the first buffer tank 5 is 0.8MPa, and the lower limit threshold is 0.4MPa.

[0060] The aforementioned mobile oxygen supply device, using the aforementioned control method, can meet temporary high-flow oxygen supply needs, stably respond to emergencies, and provide a comfortable and stable oxygen experience.

[0061] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A mobile oxygen supply device, characterized in that, include: Oxygen generator (1), the output port of which is connected to the gas-using end (100) through a pipeline. Liquid oxygen cylinder (2), the outlet of which is connected to the gas-using end (100) via a pipeline; Vaporizer (3), the vaporizer (3) is installed on the pipeline between the outlet of the liquid oxygen cylinder (2) and the gas-using end (100); Oxygen cylinder (4), the output port of which is connected to the gas-using end (100) via a pipeline.

2. The mobile oxygen supply device according to claim 1, characterized in that, The mobile oxygen supply device also includes a first buffer tank (5), the inlet of which can be connected to the outlet of the oxygen generator (1) and the outlet of the vaporizer (3), and the outlet of the first buffer tank (5) can be connected to the gas-using end (100).

3. The mobile oxygen supply device according to claim 2, characterized in that, The mobile oxygen supply device also includes a booster (6), the input port of which can be connected to the output port of the oxygen generator (1) and the output port of the vaporizer (3), and the output port of the booster (6) can be connected to the input port of the first buffer tank (5).

4. The mobile oxygen supply device according to claim 3, characterized in that, The mobile oxygen supply device also includes a first branch (7), a second branch (8) and a first combined pipeline (9). One end of the first branch (7) is connected to the output port of the oxygen generator (1) and the other end is connected to one end of the first combined pipeline (9). One end of the second branch (8) is connected to the output port of the vaporizer (3) and the other end is connected to one end of the first combined pipeline (9). The booster (6) and the first buffer tank (5) are both located on the first combined pipeline (9).

5. The mobile oxygen supply device according to claim 4, characterized in that, The mobile oxygen supply device also includes a first control valve (10), which is disposed on the first branch (7); And / or, the mobile oxygen supply device further includes a second control valve (11), which is disposed on the second branch (8); And / or, the mobile oxygen supply device further includes a third control valve (12), which is disposed on the first merging pipeline (9) and is located downstream of the first buffer tank (5); And / or, the mobile oxygen supply device further includes a first pressure sensor (13) for detecting the gas pressure inside the first buffer tank (5).

6. The mobile oxygen supply device according to claim 4, characterized in that, The mobile oxygen supply device also includes a third branch (14) and a second combined pipeline (15). One end of the third branch (14) is connected to the output port of the oxygen cylinder (4), and the other end is connected to the first combined pipeline (9) and connected to one end of the second combined pipeline (15). The other end of the second combined pipeline (15) is connected to the gas-using end (100).

7. The mobile oxygen supply device according to claim 6, characterized in that, The mobile oxygen supply device also includes a fourth control valve (16), which is located on the third branch (14); And / or, the mobile oxygen supply device further includes a first pressure reducing valve (17), which is disposed on the third branch (14); And / or, the mobile oxygen supply device further includes a second pressure reducing valve (18) and a second pressure sensor (19), the second pressure reducing valve (18) being disposed on the second merging pipeline (15), and the second pressure sensor (19) being used to detect the gas pressure in the second merging pipeline (15) downstream of the second pressure reducing valve (18).

8. A control method, characterized in that, The control method, applied to the mobile oxygen supply device as described in any one of claims 2-7, includes the following modes: Oxygen priority mode: When the input oxygen flow rate gradually increases, the oxygen generator (1), the oxygen cylinder (4) and the liquid oxygen cylinder (2) are turned on in sequence to increase the oxygen supply flow rate; Liquid oxygen priority mode: When the input oxygen flow rate gradually increases, the oxygen generator (1), the liquid oxygen cylinder (2) and the oxygen cylinder (4) are turned on in sequence to increase the oxygen supply flow rate; Fault mode: When the oxygen generator (1) malfunctions, the oxygen cylinder (4) is insufficient or the liquid oxygen cylinder (2) is insufficient, the oxygen source that malfunctions or is insufficient will be shut down and the remaining oxygen sources will be turned on.

9. The control method according to claim 8, characterized in that, In the oxygen priority mode, when the input oxygen flow rate is less than or equal to the maximum gas production flow rate of the oxygen generator (1), the demand condition is determined, and if it is, only the oxygen generator (1) is turned on to supply oxygen. When the input oxygen flow rate increases to a level greater than the maximum gas production flow rate of the oxygen generator (1), and the input oxygen flow rate is less than or equal to the sum of the maximum gas production flow rate of the oxygen generator (1) and the maximum oxygen supply flow rate of the oxygen cylinder (4), the oxygen generator (1) remains on and the oxygen cylinder (4) is turned on to supply oxygen together. When the input oxygen flow rate increases to a level greater than the sum of the maximum gas production flow rate of the oxygen generator (1) and the maximum oxygen supply flow rate of the oxygen cylinder (4), the oxygen generator (1) and the oxygen cylinder (4) remain open, and the liquid oxygen cylinder (2) is opened to supply oxygen together.

10. The control method according to claim 9, characterized in that, The requirement condition is to determine whether either the first condition or the second condition is met. The first condition is that the air pressure at the gas end (100) is lower than the preset pressure and the air pressure in the first buffer tank (5) is less than the upper limit threshold. The second condition is that the air pressure in the first buffer tank (5) is less than or equal to the lower limit threshold. And / or, the oxygen output from the first buffer tank (5) and the oxygen output from the oxygen cylinder (4) are combined and reach the gas consumption end (100). The oxygen priority mode further includes the following steps: when the gas pressure of the first buffer tank (5) reaches the upper limit threshold, it is determined whether the liquid oxygen cylinder (2) is turned on. If so, the oxygen output flow rate of the liquid oxygen cylinder (2) is reduced by a first preset value. After waiting for a first preset time, it is determined again whether the gas pressure of the first buffer tank (5) reaches the upper limit threshold. If so, the oxygen output flow rate of the liquid oxygen cylinder (2) is reduced by the first preset value until the liquid oxygen cylinder (2) is turned off. It is determined again whether the gas pressure of the first buffer tank (5) reaches the upper limit threshold. If so, the oxygen generator (1) is turned off.

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