Oxygen filling system

Abstract

The embodiment of the utility model provides an oxygen filling system. The oxygen filling system comprises oxygen supply equipment, equipment to be filled and filling equipment, the oxygen supply equipment and the to-be-filled equipment are sequentially arranged in the flowing direction of gas and communicate with each other; the filling equipment is arranged between oxygen supply equipment and equipment to be filled, the filling equipment comprises a first switch valve, a flow sensor and a control module, and the flow sensor is used for collecting a flow signal of gas; the control module is electrically connected with the first switch valve and the flow sensor and used for obtaining the flow signal and controlling opening or closing of the first switch valve based on the flow signal. By arranging the control module and the flow sensor and the first switch valve which are electrically connected with the control module, the oxygen filling system can achieve filling judgment, the problem of insufficient filling or excessive filling is effectively avoided, and the reliability and safety of the oxygen filling system are improved.

Description

Technical Field

[0001] This application belongs to the field of medical device technology, specifically relating to an oxygen filling system. Background Technology

[0002] With the improvement of living standards and the advancement of medical technology, people are paying more and more attention to respiratory health. Portable refillable oxygen cylinders can provide clean oxygen anytime and anywhere, which is beneficial to people's respiratory health and is a better oxygen therapy device.

[0003] In related technologies, when the oxygen storage capacity of a portable refillable oxygen cylinder is insufficient, an oxygen generator or high-pressure oxygen cylinder can usually be used to refill the portable refillable oxygen cylinder. However, since it is impossible to determine whether the oxygen is full during the filling process, underfilling or overfilling can easily occur, posing significant safety hazards. Utility Model Content

[0004] This application aims to provide an oxygen filling system to solve the problem that existing portable refillable oxygen cylinders cannot determine whether they are full during the oxygen filling process, which easily leads to underfilling or overfilling and poses a significant safety hazard.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] In a first aspect, this application discloses an oxygen filling system, including: an oxygen supply device, a device to be filled, and a filling device;

[0007] The oxygen supply equipment and the equipment to be filled are arranged sequentially along the gas flow direction and are interconnected.

[0008] The filling device is disposed between the oxygen supply device and the device to be filled. The filling device includes a first switching valve, a flow sensor, and a control module. The flow sensor is used to collect the flow signal of the gas. The control module is electrically connected to the first switching valve and the flow sensor respectively. The control module is used to acquire and control the opening or closing of the first switching valve based on the flow signal.

[0009] Optionally, the filling device further includes: a first pressure sensor and / or a second pressure sensor;

[0010] The first pressure sensor is disposed between the first switching valve and the oxygen supply device, and the first pressure sensor is used to collect the first pressure signal of the gas;

[0011] The second pressure sensor is disposed between the first switching valve and the filling device, and the second pressure sensor is used to collect the second pressure signal of the gas;

[0012] The control module is electrically connected to the first pressure sensor and / or the second pressure sensor respectively. The control module is used to acquire and control the opening or closing of the first switching valve based on the first pressure signal and / or the second pressure signal.

[0013] Optionally, the filling device further includes a buffer container, which is disposed between the first switching valve and the oxygen supply device, and the first pressure sensor is disposed in the buffer container.

[0014] Optionally, the filling device further includes: an oxygen concentration sensor and a first start-stop valve group, wherein the oxygen concentration sensor and the first start-stop valve group are sequentially arranged between the first switch valve and the oxygen supply device along the gas flow direction; the oxygen concentration sensor is used to collect the oxygen concentration signal of the gas; the first start-stop valve group includes a first oxygen filling channel and an exhaust channel; the first oxygen filling channel is connected to the first switch valve; and the exhaust channel is connected to the external atmosphere.

[0015] The control module is electrically connected to the oxygen concentration sensor and the first start-stop valve group respectively. The control module acquires and controls the opening or closing of the first oxygen supply channel and / or the exhaust channel in the first start-stop valve group based on the oxygen concentration signal.

[0016] Optionally, the first start-stop valve group includes: a second switching valve and a third switching valve;

[0017] The first oxygen supply channel is located at the second switching valve;

[0018] The exhaust passage is located at the third switching valve.

[0019] Optionally, the first start-stop valve group is a first switching valve, and the first oxygen supply channel and the exhaust channel are both located in the first switching valve.

[0020] Optionally, the filling device further includes an exhaust module, which is connected to the exhaust channel. When the exhaust channel is open, the exhaust module processes and discharges the gas.

[0021] Optionally, the exhaust module is an exhaust muffler.

[0022] Optionally, the filling equipment further includes a third pressure sensor, a second start-stop valve group, and a pressurization module. The third pressure sensor, the second start-stop valve group, and the pressurization module are sequentially arranged between the first start-stop valve group and the first switching valve along the gas flow direction. The third pressure sensor is used to collect the third pressure signal of the gas. The second start-stop valve group includes a second oxygen filling channel and a third oxygen filling channel. The second oxygen filling channel is sequentially connected to the pressurization module and the first switching valve, and the third oxygen filling channel is connected to the first switching valve.

[0023] The control module is electrically connected to the third pressure sensor and the second start-stop valve group respectively. The control module acquires and controls the opening or closing of the second oxygenation channel and / or the third oxygenation channel in the second start-stop valve group based on the third pressure signal.

[0024] Optionally, the second start-stop valve group is a second switching valve, and the second oxygenation channel and the third oxygenation channel are both located in the second switching valve.

[0025] Optionally, the filling device further includes: a first check valve and a second check valve;

[0026] The first one-way valve is disposed between the booster module and the first switching valve. The first one-way valve is used to guide the gas output from the booster module to flow unidirectionally to the first switching valve.

[0027] The second one-way valve is disposed between the third oxygenation channel and the first switching valve. The second one-way valve is used to guide the gas output from the second start-stop valve group to flow unidirectionally to the first switching valve.

[0028] Optionally, the filling device further includes a heat dissipation module, which is thermally connected to the pressurization module.

[0029] Optionally, the filling device further includes a pressure regulating valve, which is disposed between the oxygen supply device and the device to be filled.

[0030] In this embodiment, a control module, a flow sensor, and a first switching valve electrically connected to the control module are included. The flow sensor can collect the gas flow signal. Thus, when the equipment to be filled is not full, i.e., the flow signal has not reached a preset flow threshold, the control module can control the first switching valve to open, thereby continuously filling the equipment with oxygen. When the equipment to be filled is full, i.e., the flow signal reaches the preset flow threshold, the control module can control the first switching valve to close, thereby stopping the filling of oxygen into the equipment. In summary, the oxygen filling system of this embodiment can achieve full filling judgment, effectively avoiding the problems of underfilling or overfilling, and is beneficial to improving the reliability and safety of the oxygen filling system.

[0031] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0032] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0033] Figure 1 This is a schematic diagram of an oxygen filling system provided in an embodiment of this application;

[0034] Figure 2 This is a schematic diagram of another oxygen filling system provided in an embodiment of this application.

[0035] Figure reference numerals: 1. Oxygen supply equipment; 101. Oxygen generator; 102. High-pressure oxygen cylinder; 2. Oxygen concentration sensor; 3. First start / stop valve assembly; 31. First switching valve; P4. Fourth air inlet; A4. Fourth air outlet; B4. Fifth air outlet; 32. Second switching valve; P2. Second air inlet; A2. Second air outlet; 33. Third switching valve; P3. Third air inlet; A3. Third air outlet; 4. Exhaust module; 5. Third pressure... Sensor, 6. Second switching valve, P5. Fifth air inlet, A5. Sixth air outlet, B5. Seventh air outlet, 7. Boosting module, 8. Heat dissipation module, 9. First check valve, 10. Second check valve, 11. Buffer container, 12. First pressure sensor, 13. Pressure regulating valve, 14. First switching valve, P1. First air inlet, A1. First air outlet, 15. Flow sensor, 16. Second pressure sensor, 17. Equipment to be filled. Detailed Implementation

[0036] The embodiments of this utility model will now be described in detail. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0037] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0038] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0039] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] This application provides an oxygen filling system, which will be described in detail below with reference to the accompanying drawings.

[0041] Reference Figures 1 to 2 The diagram illustrates two oxygen filling systems provided in embodiments of this application. Figures 1 to 2As shown, this application provides an oxygen filling system, including: an oxygen supply device 1, a device to be filled 17, and a filling device; the oxygen supply device 1 and the device to be filled 17 are arranged sequentially along the gas flow direction and are interconnected; the filling device is disposed between the oxygen supply device 1 and the device to be filled 17, and the filling device includes a first switching valve 14, a flow sensor 15, and a control module. The flow sensor 15 is used to collect the gas flow signal; the control module is electrically connected to the first switching valve 14 and the flow sensor 15 respectively, and the control module is used to acquire and control the opening or closing of the first switching valve 14 based on the flow signal. Specifically, the first switching valve 14 includes a first inlet P1 and a first outlet A1. The first inlet P1 is connected to the oxygen supply device 1, the first outlet A1 is connected to the device to be filled 17, and the flow sensor 15 is disposed in the pipeline between the first outlet A1 and the device to be filled 17.

[0042] In this embodiment, a control module, a flow sensor 15, and a first switching valve 14 electrically connected to the control module are included. The first switching valve 14 and the flow sensor 15 can be sequentially arranged along the gas flow direction. The flow sensor 15 collects the gas flow signal, which is used to detect whether the filling device 17 is full. When the filling device 17 is not full, i.e., the flow signal is greater than a preset flow threshold, the control module can control the first switching valve 14 to open, thus continuously filling the filling device 17 with oxygen. When the filling device 17 is full, i.e., the flow signal is less than or equal to the preset flow threshold, the control module can control the first switching valve 14 to close, thus stopping the filling of oxygen into the filling device 17. In summary, the oxygen filling system of this embodiment can achieve fullness judgment, effectively avoiding the problems of underfilling or overfilling, and is beneficial to improving the reliability and safety of the oxygen filling system.

[0043] In addition, the flow sensor 15 should be placed as close as possible to the oxygen filling device 17. This ensures that the collected flow signal is as close as possible to the flow value at the inlet of the oxygen filling device 17, thereby improving the accuracy of the flow signal and further enhancing the reliability and safety of the oxygen filling system. Furthermore, the inclusion of a control module allows for automatic control of the oxygen filling system's start and stop based on signals such as flow rate and pressure, reducing human intervention, simplifying operation, and improving oxygen filling efficiency.

[0044] It should be noted that the specific value of the preset flow threshold is not limited in the embodiments of this application, and those skilled in the art can adjust it according to actual needs. It is understood that the preset flow threshold should be as close as possible to 0 L / min to avoid oxygen waste during the oxygen filling process. In one embodiment, the preset flow threshold is 0 L / min, meaning that when the flow signal collected by the flow sensor 15 is 0 L / min, the oxygen storage capacity of the device to be filled 17 has reached its maximum value, i.e., the device to be filled 17 is fully filled. Furthermore, the oxygen supply device 1 in the embodiments of this application includes, but is not limited to, an oxygen generator 101, a high-pressure oxygen cylinder 102, or other devices that can provide high-pressure oxygen. The device to be filled 17 includes, but is not limited to, a portable refillable oxygen cylinder, a disposable oxygen bag, or other devices that can receive high-pressure oxygen; these are not limited here, and those skilled in the art can adjust them according to actual needs. It is understood that both the input end (i.e., the oxygen supply device 1) and the output end (i.e., the device to be filled 17) of the oxygen filling system in the embodiments of this application are high-pressure gases. For example, the gas pressure at the input end is generally higher than 2 kPa, and the gas pressure at the output end is generally higher than 200 kPa.

[0045] In some optional embodiments of this application, the oxygen filling system further includes: a first pressure sensor 12 and / or a second pressure sensor 16; the first pressure sensor 12 is disposed between the first switching valve 14 and the oxygen supply device 1, and is used to collect a first pressure signal of the gas; the second pressure sensor 16 is disposed between the first switching valve 14 and the device to be filled 17, and is used to collect a second pressure signal of the gas; a control module is electrically connected to the first pressure sensor 12 and / or the second pressure sensor 16 respectively, and the control module is used to acquire and control the opening or closing of the first switching valve 14 based on the first pressure signal and / or the second pressure signal. Specifically, the control module can determine whether the device to be filled 17 is full by the difference between the acquired first pressure signal and the second pressure signal, thereby controlling the opening or closing of the first switching valve 14.

[0046] In this embodiment, a first pressure sensor 12 and a second pressure sensor 16 are provided. The first pressure sensor 12 can collect the pressure signal of the gas output from the oxygen supply device 1, and the second pressure sensor 16 can collect the pressure signal of the gas input to the filling device 17, thus enabling real-time monitoring of pressure changes during the oxygen filling process. When the filling device 17 is not fully filled, i.e., the difference between the first and second pressure signals is greater than a preset pressure difference threshold, the control module can control the first switching valve 14 to open, thereby continuously filling the filling device 17 with oxygen. When the filling device 17 is fully filled, i.e., the difference between the first and second pressure signals is less than or equal to the preset pressure difference threshold, the control module can control the first switching valve 14 to close, thereby stopping the filling of oxygen into the filling device 17. In summary, the oxygen filling system of this embodiment can achieve fullness determination not only based on flow signals but also on pressure signals, i.e., it can achieve dual fullness determination, which is beneficial to further improving the reliability and safety of the oxygen filling system.

[0047] In some optional embodiments of this application, the filling device further includes: a buffer container 11, which is disposed between the first switching valve 14 and the oxygen supply device 1, and the first pressure sensor 12 is disposed in the buffer container 11.

[0048] In this embodiment, the presence of a buffer container 11 and the placement of the first pressure sensor 12 within it balances the pressure difference between the oxygen supply device 1 and the device to be filled 17, reducing the impact of pressure fluctuations on the oxygen filling process and improving the reliability and stability of oxygen filling. Simultaneously, before filling, a portion of oxygen can be pre-pressurized into the buffer container 11 as a reserve, thereby improving oxygen filling efficiency, saving filling waiting time, and enhancing the user experience.

[0049] It should be noted that the buffer container 11 can be a finished buffer tank, and the volume of the finished buffer tank is more than 1.5 times the oxygen storage capacity of the device 17 to be filled, thereby ensuring that at least one device 17 to be filled is fully filled. Furthermore, this application embodiment does not limit the specific value of the preset pressure difference threshold; those skilled in the art can adjust it according to actual needs. It is understood that the preset pressure difference threshold should be as close as possible to 0 Pa to avoid oxygen waste during the oxygen filling process. In one embodiment, the preset pressure difference threshold is 0 Pa, meaning that when the pressure difference between the first pressure signal collected by the first pressure sensor 12 and the second pressure signal collected by the second pressure sensor 16 is 0 Pa, the oxygen storage capacity of the device 17 to be filled has reached its maximum value, i.e., the device 17 to be filled is in a full state. In addition, the second pressure sensor 16 should be as close as possible to the device 17 to be filled, so that the collected pressure signal is as close as possible to the pressure value at the inlet of the device 17 to be filled, thereby improving the reliability of the fullness judgment of the oxygen filling system.

[0050] In some optional embodiments of this application, the oxygen generation system further includes a second pressure sensor 16. The difference from the above embodiments is that the first pressure sensor 12 is not provided, enabling on-demand generation or use. The second pressure sensor is located between the first switching valve 14 and the device to be filled 17, and closer to the device 17. It is used to collect a second pressure signal of the gas. The control module acquires and controls the opening or closing of the first switching valve 14 based on the second pressure signal. For example, after the device 17 is connected, the control module can acquire the rated pressure of the device 17, or the rated pressure of the device 17 can be preset (or manually set according to different devices 17). The control module can determine whether the device 17 is full by the difference between the second pressure signal and the rated pressure, thereby controlling the opening or closing of the first switching valve 14. That is, when the difference between the second pressure signal and the rated pressure of the device 17 reaches a preset value, it indicates that the device is full, and the control module controls the first switching valve 14 to close.

[0051] In some optional embodiments of this application, the oxygen filling system further includes: an oxygen concentration sensor 2 and a first start-stop valve group 3. The oxygen concentration sensor 2 and the first start-stop valve group 3 are sequentially arranged between the first switch valve 14 and the oxygen supply device 1 along the gas flow direction. The first start-stop valve group 3 includes a first oxygen filling channel and an exhaust channel. The first oxygen filling channel is connected to the first switch valve 14, and the exhaust channel is connected to the external atmosphere. The control module is electrically connected to the oxygen concentration sensor 2 and the first start-stop valve group 3 respectively. The control module acquires and controls the opening or closing of the first oxygen filling channel and / or the exhaust channel in the first start-stop valve group 3 based on the oxygen concentration signal.

[0052] In this embodiment, an oxygen concentration sensor 2 and a first start-stop valve group 3 are provided. The oxygen concentration sensor 2 can collect the oxygen concentration signal of the gas. Thus, when the oxygen concentration meets the standard (i.e., the oxygen concentration signal is greater than or equal to a preset oxygen concentration threshold), the control module can control the first oxygen filling channel of the first start-stop valve group 3 to open and the exhaust channel to close, thereby continuously filling the device 17 with qualified oxygen. When the oxygen concentration does not meet the standard (i.e., the oxygen concentration signal is lower than the preset oxygen concentration threshold), the control module can control the first oxygen filling channel of the first start-stop valve group 3 to close and the exhaust channel to open, thereby avoiding filling the device 17 with unqualified oxygen and improving the oxygen therapy effect.

[0053] It should be noted that the specific value of the preset oxygen concentration threshold is not limited in the embodiments of this application, and those skilled in the art can adjust it according to actual needs. In the field of oxygen therapy, the preset oxygen concentration threshold should generally be greater than or equal to 90%. Based on this, in one embodiment, the preset oxygen concentration threshold is 90%. When the oxygen concentration signal collected by the oxygen concentration sensor 2 is greater than or equal to 90%, that is, the oxygen concentration meets the standard, the control module can control the first start-stop valve group 3 to open, so that oxygen can be continuously filled into the filling device 17. When the oxygen concentration signal collected by the oxygen concentration sensor 2 is less than 90%, that is, the oxygen concentration does not meet the standard, the control module can control the first start-stop valve group 3 to close, so that oxygen filling into the filling device 17 can be stopped. In summary, the automatic opening and closing of the first start-stop valve group 3 can effectively prevent non-compliant oxygen from being filled into the filling device 17, which is beneficial to improving the oxygen therapy effect.

[0054] It should be noted that the first start-stop valve group 3 is applicable not only at the beginning of the oxygen filling system startup, but also during the oxygen filling process. When the oxygen concentration is not up to standard, the first start-stop valve group 3 is closed, and the oxygen filling system stops filling. When the oxygen concentration is up to standard, the first start-stop valve group 3 is opened, and the oxygen filling system starts filling.

[0055] In some alternative embodiments of this application, such as Figure 2 As shown, the first start / stop valve group 3 includes a second switching valve 32 and a third switching valve 33. A first oxygenation channel is located in the second switching valve 32; opening or closing the second switching valve 32 allows the first oxygenation channel to be opened or closed. An exhaust channel is located in the third switching valve 33; opening or closing the third switching valve 33 allows the exhaust channel to be opened or closed. Specifically, the first oxygenation channel of the second switching valve 32 includes a second inlet P2 and a second outlet A2. The second inlet P2 is connected to the oxygen supply device 1, and the second outlet A2 is connected to the first switching valve 14. The exhaust channel of the third switching valve 33 includes a third inlet P3 and a third outlet A3. The third inlet P3 is connected to the oxygen supply device 1, and the third outlet A3 is connected to the external atmosphere.

[0056] In this embodiment, by setting a second switching valve 32 and a third switching valve 33, when the oxygen concentration signal is greater than or equal to a preset oxygen concentration threshold, the control module can control the first oxygen filling channel of the second switching valve 32 to open and the exhaust channel of the third switching valve 33 to close, so that the qualified oxygen flows sequentially through the second air inlet P2, the second air outlet A2, and the first switching valve 14 and is finally filled into the filling device 17. When the oxygen concentration signal is less than the preset oxygen concentration threshold, the control module can control the first oxygen filling channel of the second switching valve 32 to close and the exhaust channel of the third switching valve 33 to open, so that the unqualified oxygen flows sequentially through the third air inlet P3 and the third air outlet A3 and is finally discharged into the atmosphere.

[0057] In some alternative embodiments of this application, such as Figure 1 As shown, the first start-stop valve group 3 is a first switching valve 31. Both the first oxygenation channel and the exhaust channel are located within the first switching valve 31. By adjusting the first switching valve 31, the system can switch between opening the first oxygenation channel and closing the exhaust channel, and closing the first oxygenation channel and opening the exhaust channel. Specifically, the first switching valve 31 includes a fourth air inlet P4, a fourth air outlet A4, and a fifth air outlet B4. The fourth air inlet P4 and the fourth air outlet A4 are connected to form the first oxygenation channel, and the fourth air inlet A4 and the fifth air outlet B4 are connected to form the exhaust channel. The fourth air inlet P4 is connected to the oxygen supply device 1, the fourth air outlet A4 is connected to the first switch valve 14, and the fifth air outlet B4 is open to the external atmosphere. It should be noted that the first switching valve 31 can switch between two states: connecting the fourth air inlet P4 and the fourth air outlet A4, and connecting the fourth air inlet P4 and the fifth air outlet B4, thereby opening or closing the first oxygenation channel and the exhaust channel.

[0058] In this embodiment, by setting a first switching valve 31, when the oxygen concentration signal is greater than or equal to a preset oxygen concentration threshold, the control module can control the first oxygen filling channel of the first switching valve 31 to open and the exhaust channel to close, that is, switch to the state where the fourth air inlet P4 and the fourth air outlet A4 are connected, so that the qualified oxygen flows sequentially through the fourth air inlet P4, the fourth air outlet A4 and the first switching valve 14 and is finally filled into the filling device 17. When the oxygen concentration signal is less than the preset oxygen concentration threshold, the control module can control the first oxygen filling channel of the first switching valve 31 to close and the exhaust channel to open, that is, switch to the state where the fourth air inlet P4 and the fifth air outlet B4 are connected, so that the unqualified oxygen flows sequentially through the fourth air inlet P4 and the fifth air outlet B4 and is finally discharged into the atmosphere.

[0059] In some optional embodiments of this application, the filling device further includes: an exhaust module 4, which is connected to an exhaust channel. When the exhaust channel is open, the exhaust module 4 processes and discharges gas. Specifically, the exhaust module 4 includes a first input port and a first output port. The first input port is connected to the exhaust channel (i.e., the third outlet A3 of the third switching valve 33 or the fifth outlet B4 of the first switching valve 31), and the first output port is connected to the external atmosphere.

[0060] In this embodiment of the application, by setting an exhaust module 4, the oxygen-enriched gas that does not meet the requirements (i.e., the gas that is less than the preset oxygen concentration threshold) can be discharged in a timely manner, so as to avoid the problem of substandard oxygen concentration in the filling equipment 17.

[0061] It should be noted that, generally speaking, high-pressure gas discharge will generate a lot of noise. Based on this, in one embodiment, the exhaust module 4 can be an exhaust muffler, which can effectively reduce noise and help reduce noise pollution.

[0062] In some optional embodiments of this application, the oxygen filling system further includes: a third pressure sensor 5, a second start-stop valve group, and a pressurization module 7. The third pressure sensor 5, the second start-stop valve group, and the pressurization module 7 are sequentially arranged between the first start-stop valve group 3 and the first switching valve 14 along the gas flow direction. The third pressure sensor 5 is used to collect the third pressure signal of the gas. The second start-stop valve group includes a second oxygen filling channel and a third oxygen filling channel. The second oxygen filling channel is sequentially connected to the pressurization module 7 and the first switching valve 14, and the third oxygen filling channel is connected to the first switching valve 14. The control module is electrically connected to the third pressure sensor 5 and the second start-stop valve group respectively. The control module acquires and controls the opening or closing of the second oxygen filling channel and / or the third oxygen filling channel in the second start-stop valve group based on the third pressure signal.

[0063] In practical applications, the gas pressure output by oxygen supply device 1 is typically higher than 2 kPa, while the gas pressure of the device to be filled 17 is typically higher than 200 kPa. Based on this, a pressurization module 7 is installed to pressurize the gas output by oxygen supply device 1, ensuring that the gas pressure in the device to be filled 17 meets the requirements. A third pressure sensor 5 and a second start-stop valve assembly are included. The third pressure sensor 5 can collect the pressure signal of the gas output by oxygen supply device 1. Thus, when the oxygen pressure meets the standard (i.e., the third pressure signal is greater than or equal to a preset first pressure threshold), the control module can control the third oxygenation channel of the second start-stop valve assembly to open and the second oxygenation channel to close, thereby continuously supplying the device to be filled 17 with qualified oxygen. When the oxygen pressure does not meet the standard (i.e., the third pressure signal is less than the preset first pressure threshold), the control module can control the third oxygenation channel of the second start-stop valve assembly to close and the second oxygenation channel to open. The oxygen is then pressurized by the pressurization module 7 before being output, thus avoiding supplying the device to be filled 17 with unqualified oxygen and improving the oxygen therapy effect.

[0064] It should be noted that the preset first pressure threshold varies for different devices 17 to be filled. Therefore, the specific value of the preset first pressure threshold is not limited in this embodiment, and those skilled in the art can adjust it according to actual needs. For example, when the device 17 to be filled is a portable refillable oxygen cylinder, the preset first pressure threshold is generally 15 MPa. When the device 17 to be filled is a disposable oxygen bag, the preset first pressure threshold is generally 10 kPa.

[0065] In some optional embodiments of this application, the second start-stop valve group is a second switching valve 6. Both the second and third oxygenation channels are located within the second switching valve 6. Adjusting the second switching valve 6 allows switching between opening the second oxygenation channel and closing the third oxygenation channel, and closing the second oxygenation channel and opening the third oxygenation channel. Specifically, the second switching valve 6 includes a fifth air inlet P5, a sixth air outlet A5, and a seventh air outlet B5. The fifth air inlet P5 and the sixth air outlet A5 are connected to form the second oxygenation channel, and the fifth air inlet P5 and the seventh air outlet B5 are connected to form the third oxygenation channel. The fifth air inlet P5 is connected to the oxygen supply device 1. The sixth air outlet A5 is sequentially connected to the booster module 7 and the first switching valve 14, and the seventh air outlet B5 is connected to the first switching valve 14. Further, the booster module 7 includes a second input port and a second output port. The second input port is connected to the sixth air outlet A5 of the second oxygenation channel, and the second output port is connected to the first switching valve 14. It should be noted that the second switching valve 6 can switch between two states: connecting the fifth air inlet P5 and the sixth air outlet A5, and connecting the fifth air inlet P5 and the seventh air outlet B5, thereby opening or closing the second and third oxygenation channels.

[0066] In this embodiment, by setting a second switching valve 6, when the third pressure signal is greater than or equal to a preset first pressure threshold, the control module can control the third oxygenation channel of the second switching valve 6 to open and the second oxygenation channel to close, that is, switch to the state where the fifth air inlet P5 and the seventh air outlet B5 are connected, so that the qualified oxygen flows sequentially through the fifth air inlet P5, the seventh air outlet B5 and the first switching valve 14 and is finally filled into the filling device 17. When the third pressure signal is less than the preset first pressure threshold, the control module can control the third oxygenation channel of the second switching valve 6 to close and the second oxygenation channel to open, that is, switch to the state where the fifth air inlet P5 and the sixth air outlet A5 are connected, so that the unqualified oxygen flows sequentially through the fifth air inlet P5, the sixth air outlet A5 and the second input port into the pressurization module 7 for pressurization, and the pressurized qualified oxygen is output from the second output port to the buffer container 11 and finally filled into the filling device 17.

[0067] It should be noted that, in one embodiment, the booster module 7 is a booster compressor, which is electrically connected to the control module. The control module can control the start and stop of the booster compressor based on a first pressure signal (i.e., the first pressure signal collected by the first pressure sensor 12 located in the buffer container 11). Specifically, when the first pressure signal does not reach a preset second pressure threshold, the control module controls the booster compressor to start; when the first pressure signal reaches the preset second pressure threshold, the control module controls the booster compressor to stop. The preset second pressure threshold can be the same as the preset first pressure threshold mentioned above.

[0068] Furthermore, the oxygen filling system of this application embodiment also includes a heat dissipation module 8, which is thermally connected to the pressurization module 7 to dissipate heat from the pressurization module 7. This not only prevents the pressurization module 7 from malfunctioning due to overheating but also avoids excessively high temperatures in the gas output from the pressurization module 7. In one embodiment, the heat dissipation module 8 can be a cooling fan.

[0069] In some optional embodiments of this application, the oxygen filling system further includes: a first one-way valve 9 and a second one-way valve 10; the first one-way valve 9 is disposed between the pressurization module 7 and the first switching valve 14, and is used to guide the gas output from the pressurization module 7 to flow unidirectionally to the first switching valve 14; the second one-way valve 10 is disposed between the third oxygen filling channel and the first switching valve 14, and is used to guide the gas output from the second start-stop valve group to flow unidirectionally to the first switching valve 14. Further, the first one-way valve 9 is disposed between the second output port of the pressurization module 7 and the buffer container 11 located upstream of the first switching valve 14, and the second one-way valve 10 is disposed between the seventh outlet B5 of the third oxygen filling channel and the buffer container 11 located upstream of the first switching valve 14.

[0070] In this embodiment, since a first one-way valve 9 and a second one-way valve 10 are provided, the first one-way valve 9 can ensure that the gas output from the second output port of the booster module 7 can only flow in one direction to the downstream device, such as the buffer container 11, and the second one-way valve 10 can ensure that the gas output from the seventh outlet B5 of the second switching valve 6 can only flow in one direction to the downstream device, such as the buffer container 11, thereby preventing the gas from flowing back.

[0071] In practical applications, due to the different devices 17 to be filled, in some optional embodiments of this application, the filling device further includes a pressure regulating valve 13. The pressure regulating valve 13 is disposed between the oxygen supply device 1 and the device 17 to be filled. Specifically, the pressure regulating valve 13 is disposed between the buffer container 11 and the first switching valve 14. In this way, a suitable pressure output range can be adjusted according to the gas pressure required by the device 17 to be filled, thereby improving the versatility of the oxygen filling system to adapt to different application scenarios.

[0072] In practical applications, the first switching valve 14, the second switching valve 32, the third switching valve 33, the first switching valve 31, and the second switching valve 6 of this application can be solenoid valves. Solenoid valves have advantages such as fast response speed, which can further improve the reliability of the oxygen filling system. In addition, the oxygen supply device 1, the exhaust module 4, the pressurization module 7, and the buffer container 11 in the oxygen filling system of this application embodiment can all be existing finished products.

[0073] The method for determining fullness of the oxygen filling system in this application embodiment is as follows:

[0074] The control module acquires and controls the opening or closing of the first switching valve 14 based on the flow signal collected by the flow sensor 15;

[0075] And / or, the control module acquires the first pressure signal from the first pressure sensor 12 and the second pressure signal from the second pressure sensor 16 to control the opening or closing of the first switching valve 14.

[0076] The specific process of determining fullness based on flow rate signal is as follows: when the flow rate signal is greater than a preset flow rate threshold, the control module controls the first switch valve 14 to open, so as to continuously fill the oxygen supply to the device 17 to be filled; when the flow rate signal is less than or equal to the preset flow rate threshold, the control module controls the first switch valve 14 to close, so as to stop filling the oxygen supply to the device 17 to be filled.

[0077] The specific process of determining fullness based on pressure signals is as follows: When the difference between the first pressure signal and the second pressure signal is greater than the preset pressure difference threshold, the control module controls the first switch valve 14 to open, so as to continuously fill the equipment 17 to be filled with oxygen; when the difference between the first pressure signal and the second pressure signal is less than or equal to the preset pressure difference threshold, the control module controls the first switch valve 14 to close, so as to stop filling the equipment 17 to be filled with oxygen.

[0078] The automatic start / stop determination method of the oxygen filling system in this application embodiment is as follows:

[0079] The control module acquires and controls the opening or closing of the first oxygenation channel and / or exhaust channel in the first start-stop valve group 3 based on the oxygen concentration signal collected by the oxygen concentration sensor 2.

[0080] And / or, the control module acquires and controls the opening or closing of the second oxygenation channel and / or the third oxygenation channel in the second start-stop valve group based on the third pressure signal collected by the third pressure sensor 5.

[0081] The specific process of automatic start / stop judgment based on oxygen concentration signal is as follows: When the oxygen concentration signal is greater than or equal to the preset oxygen concentration threshold, the control module controls the first oxygen filling channel of the first start / stop valve group 3 to open and the exhaust channel to close, so as to fill oxygen into the equipment 17 to be filled; when the oxygen concentration signal is less than the preset oxygen concentration threshold, the control module controls the first oxygen filling channel of the first start / stop valve group 3 to close and the exhaust channel to open, so as to stop filling oxygen into the equipment 17 to be filled. At the same time, the control module controls the exhaust module 4 to start, so as to discharge the oxygen that does not meet the requirements.

[0082] The specific process of automatic start / stop judgment based on pressure signal is as follows: When the third pressure signal is greater than or equal to the preset first pressure threshold, the control module controls the third oxygen supply channel of the second start / stop valve group to open and the second oxygen supply channel to close, so as to supply oxygen to the equipment 17 to be filled; when the third pressure signal is less than the preset first pressure threshold, the control module controls the third oxygen supply channel to close and the second oxygen supply channel to open, so as to stop supplying oxygen to the equipment 17 to be filled. At the same time, the control module controls the pressurization module 7 to start, so as to pressurize the oxygen that does not meet the requirements.

[0083] The working principle of the oxygen filling system provided in this application embodiment is as follows:

[0084] Connect the oxygen supply device 1, the filling device, and the device to be filled 17 in sequence. Press the start button (the oxygen supply device 1 and the filling device can each have their own start button). The oxygen filling system will start, and the oxygen supply device 1 will supply oxygen to the filling device. The control module will execute automatic control functions, including at least self-start and self-stop functions. The specific filling control process is as follows.

[0085] 1. Input oxygen concentration judgment: The oxygen concentration sensor 2 detects the input oxygen. If the oxygen concentration meets the standard, that is, when the oxygen concentration signal is greater than or equal to the preset oxygen concentration threshold, the oxygen filling system starts filling. That is, the control module controls the first oxygen filling channel in the first start-stop valve group 3 to open and the exhaust channel to close, so as to fill the equipment 17 to be filled with oxygen that meets the requirements. When the oxygen concentration does not meet the standard, the system stops filling. That is, the control module controls the first oxygen filling channel in the first start-stop valve group 3 to close and the exhaust channel to open, and the oxygen that does not meet the standard is discharged through the exhaust module 4 until the oxygen concentration meets the standard and the exhaust channel is closed.

[0086] 2. Input oxygen pressure judgment: The third pressure sensor 5 detects the oxygen pressure output from the first oxygenation channel in real time. If the pressure is greater than or equal to the preset first pressure threshold, the control module controls the third oxygenation channel of the second switching valve 6 to open to deliver oxygen to the buffer container 11; if the pressure is less than the preset first pressure threshold, the control module controls the second oxygenation channel of the second switching valve 6 to open to deliver oxygen to the pressurization module 7 for pressurization. After being pressurized by the pressurization module 7, the oxygen is delivered to the buffer container 11.

[0087] 3. Automatic Start / Stop for Filling and Full Completion: Flow signal is collected by flow sensor 15. If the flow signal meets the condition (greater than or equal to a preset flow threshold), the control module controls the first switching valve 14 to open and fill the device 17 with oxygen. If the flow signal does not meet the condition (less than the preset flow threshold), the control module controls the first switching valve 14 to close and stop filling the device 17 with oxygen, and continues with step 2 until the flow signal meets the condition. Alternatively, the pressure at the inlet of buffer container 11 and the device 17 to be filled is detected in real time by the first pressure sensor 12 and the second pressure sensor 16, respectively. If the pressure difference between the two locations meets the condition (greater than or equal to a preset pressure difference threshold), the control module controls the first switching valve 14 to open and fill the device 17 with oxygen. If the pressure difference does not meet the condition (less than the preset pressure difference threshold), the control module controls the first switching valve 14 to close and stop filling the device 17 with oxygen, and continues with step 2 until the pressure difference meets the condition. Alternatively, the control module can determine whether the device 17 to be filled is full simply by the difference between the second pressure signal and the rated pressure of the device 17 to be filled, thereby controlling the opening or closing of the first switching valve 14.

[0088] The oxygen filling system provided in this application has at least the following advantages:

[0089] In this embodiment, a control module, a flow sensor, and a first switching valve electrically connected to the control module are included. The flow sensor can collect the gas flow signal. Thus, when the equipment to be filled is not full (i.e., the flow signal is greater than a preset flow threshold), the control module can control the first switching valve to open, thereby continuously filling the equipment with oxygen. When the equipment to be filled is full (i.e., the flow signal is less than or equal to the preset flow threshold), the control module can control the first switching valve to close, thereby stopping the filling of oxygen into the equipment. In summary, the oxygen filling system of this embodiment can achieve fullness determination, effectively avoiding the problems of underfilling or overfilling, and improving the reliability and safety of the oxygen filling system.

[0090] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0091] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An oxygen filling system characterized by, The application relates to an oxygen supply device, a device to be filled and a filling device. The oxygen supply device and the device to be filled are sequentially arranged along the flow direction of the gas and are in communication with each other. The filling device is arranged between the oxygen supply device and the device to be filled, and comprises a first switch valve, a flow sensor and a control module. The filling device further comprises a first pressure sensor and / or a second pressure sensor.

2. The oxygen filling system of claim 1, wherein, The first pressure sensor is arranged between the first switch valve and the oxygen supply device, and is used for collecting a first pressure signal of the gas. The second pressure sensor is arranged between the first switch valve and the device to be filled, and is used for collecting a second pressure signal of the gas. The control module is electrically connected with the first pressure sensor and / or the second pressure sensor, and is used for acquiring and controlling the opening or closing of the first switch valve based on the first pressure signal and / or the second pressure signal. The filling device further comprises a buffer container, the buffer container is arranged between the first switch valve and the oxygen supply device, and the first pressure sensor is arranged in the buffer container.

3. The oxygen filling system of claim 2, wherein, The filling device further comprises an oxygen concentration sensor and a first start-stop valve group.

4. The oxygen filling system of claim 1, wherein, The oxygen concentration sensor is used for collecting an oxygen concentration signal of the gas. The control module is electrically connected with the oxygen concentration sensor and the first start-stop valve group, and is used for acquiring and controlling the opening or closing of the first oxygen charging channel and / or the exhaust channel of the first start-stop valve group based on the oxygen concentration signal.

5. The oxygen filling system of claim 4, wherein, The first start-stop valve group comprises a second switch valve and a third switch valve. The first oxygen charging channel is arranged in the second switch valve. The exhaust channel is arranged in the third switch valve.

6. The oxygen filling system of claim 4, wherein, The first start-stop valve group is a first switch valve, and the first oxygen charging channel and the exhaust channel are arranged in the first switch valve.

7. The oxygen filling system according to any one of claims 4-6, characterized in that, The filling device further comprises an exhaust module, the exhaust module is in communication with the exhaust channel, and the exhaust module processes and discharges the gas in the open state of the exhaust channel.

8. The oxygen filling system of claim 4, wherein, The filling device further comprises a third pressure sensor, a second start-stop valve group and a pressure boosting module, the third pressure sensor, the second start-stop valve group and the pressure boosting module are sequentially arranged between the first start-stop valve group and the first on-off valve in the flow direction of the gas, the third pressure sensor is configured to collect a third pressure signal of the gas, the second start-stop valve group comprises a second oxygen charging channel and a third oxygen charging channel, the second oxygen charging channel is sequentially communicated with the pressure boosting module and the first on-off valve, the third oxygen charging channel is communicated with the first on-off valve; The control module is electrically connected with the third pressure sensor and the second start-stop valve group respectively, and the control module acquires the third pressure signal and controls opening or closing of the second oxygen charging channel and / or the third oxygen charging channel in the second start-stop valve group based on the third pressure signal.

9. The oxygen filling system of claim 8, wherein, The second start-stop valve group is a second switching valve, and the second oxygen charging channel and the third oxygen charging channel are arranged in the second switching valve.

10. The oxygen filling system of claim 8, wherein, The filling device further comprises a first one-way valve and a second one-way valve. The first one-way valve is arranged between the pressure boosting module and the first on-off valve, and is configured to guide the gas output from the pressure boosting module to flow to the first on-off valve in one direction. The second one-way valve is arranged between the third oxygen charging channel and the first on-off valve, and is configured to guide the gas output from the second start-stop valve group to flow to the first on-off valve in one direction.

11. The oxygen filling system of claim 1, wherein, The filling device further comprises a pressure regulating valve arranged between the oxygen supply device and the device to be filled.

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