CN114275164A - High-altitude continuous oxygen supply pressure regulation and control system and method - Google Patents
High-altitude continuous oxygen supply pressure regulation and control system and method Download PDFInfo
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- CN114275164A CN114275164A CN202210052349.4A CN202210052349A CN114275164A CN 114275164 A CN114275164 A CN 114275164A CN 202210052349 A CN202210052349 A CN 202210052349A CN 114275164 A CN114275164 A CN 114275164A
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Abstract
The invention discloses a high-altitude continuous oxygen supply pressure regulation and control system and a method, wherein the system comprises a shell, an air inlet electromagnetic valve, an air outlet electromagnetic valve, a moving part, an elastic part, a height sensor, a first pressure sensor, a second pressure sensor and a controller; the shell is provided with an air inlet, an air outlet, a first cavity and a second cavity; the air inlet electromagnetic valve is arranged between the air inlet and the first cavity; the air outlet electromagnetic valve is connected with the first cavity; the elastic piece is positioned in the second cavity; the moving part is partially positioned in the first cavity, partially positioned in the second cavity and connected with the elastic piece, and the gas pressure in the first cavity and the elastic piece are matched to control the communication between the second cavity and the gas outlet; the first pressure sensor and the second pressure sensor are respectively connected with the first cavity and the air outlet; the controller is respectively connected with the height sensor, the first pressure sensor, the second pressure sensor, the air inlet electromagnetic valve and the air outlet electromagnetic valve. The invention can realize closed-loop regulation and control of high-altitude continuous oxygen supply pressure and has high intelligent degree.
Description
Technical Field
The invention belongs to the field of oxygen supply pressure regulation, and particularly relates to a high-altitude continuous oxygen supply pressure regulation system and method.
Background
The cabins of aircraft are generally divided into pressurized cabins and non-pressurized cabins. When the aircraft flies without pressurization, if the aircraft flies for a long time at 3000-4000 m, passengers can have slight oxygen deficiency and headache and fatigue; when the flight is at 4500m, due to moderate hypoxia, the passengers can be sleepy, lips and nails are purple, and the eyesight judgment is reduced; when the aircraft flies above 6500m, oxygen is severely lacked, and passengers suffer convulsion and lose consciousness until death. The aircraft oxygen supply equipment is used for supplying oxygen to aircraft passengers in a non-supercharged cabin, the requirement of flying at the height of about 4000m is met, the supercharged cabin does not generally need the oxygen supply equipment, but when the cabin is supercharged to be invalid, the aircraft descends and simultaneously needs to supply oxygen for the passengers for a period of time.
Chinese utility model patent application with publication number CN211272968U discloses a mechanical type oxygen suppliment automatic regulator, including the regulator casing, air valve subassembly, bellows subassembly, lung formula valve subassembly and film assembly, be equipped with the air cavity and the oxygen inner chamber of keeping apart mutually in the regulator casing, the one end of regulator casing is equipped with the face guard that is used for being connected with the face guard that breathes in, air valve unit mount is in the open end of air cavity, bellows unit mount is in the air cavity, lung formula valve unit mount is in the entry of oxygen inner chamber, the film assembly mount is in the port of oxygen inner chamber. Because this mechanical type oxygen suppliment automatic regulator adopts mechanical type oxygen suppliment, the oxygen suppliment machine is heavy, and intelligent degree is low.
The Chinese patent application with publication number CN108888881A discloses a civil aircraft emergency oxygen supply control method, which adopts a pulse oxygen supply controller, which comprises a breathing cavity electromagnetic valve, a breathing pressure sensor and a height pressure sensor integrated on a circuit board, and supplies power to a latch structure of a throwing face mask; when height pressure sensor's pressure reached emergency threshold value or received the emergent instruction of host computer, the face guard was put in to pulse oxygen suppliment controller control hasp structure, later judge in real time whether breathing pressure sensor's in the face guard data reaches the oxygen suppliment threshold value, when reaching the oxygen suppliment threshold value, start the air supply and pass through the oxygen suppliment of breathing chamber solenoid valve. The controller controls the delivery time and delivery quantity of the oxygen supplied by the electromagnetic valve in a pulse mode, and realizes the accurate control of the oxygen supply quantity. The control method has limited height adjustment adaptability, namely, the adjustment capability is difficult to achieve the equivalent.
Disclosure of Invention
Aiming at the problems, the invention provides a high-altitude continuous oxygen supply pressure regulation and control system and a high-altitude continuous oxygen supply pressure regulation and control method, which can realize high-altitude continuous oxygen supply pressure closed-loop regulation and control, and have the advantages of simple structure and high intelligent degree.
In order to achieve the technical purpose and achieve the technical effects, the invention is realized by the following technical scheme:
in a first aspect, the present invention provides a high altitude continuous oxygen supply pressure regulation system, comprising: the device comprises a shell, an air inlet electromagnetic valve, an air outlet electromagnetic valve, a moving part, an elastic part, a height sensor, a first pressure sensor, a second pressure sensor and a controller;
the shell is provided with an air inlet, an air outlet, a first cavity and a second cavity;
the air inlet electromagnetic valve is arranged between the air inlet and the first cavity and is respectively communicated with the air inlet and the first cavity;
the air outlet electromagnetic valve is communicated with the first cavity;
the elastic piece is positioned in the second cavity;
the moving part is partially positioned in the first cavity, partially positioned in the second cavity, connected with the elastic piece and matched with the gas pressure in the first cavity and the elastic piece to control whether the second cavity is communicated with the gas outlet or not;
the first pressure sensor is connected with the first cavity;
the second pressure sensor is connected with the air outlet;
the controller is respectively connected with the height sensor, the first pressure sensor, the second pressure sensor, the air inlet electromagnetic valve and the air outlet electromagnetic valve.
Optionally, when the air inlet electromagnetic valve is closed and the air outlet electromagnetic valve is opened, the gas in the first cavity is discharged, the moving part is pressed on the shell under the elastic force of the elastic part, the second cavity is not communicated with the air outlet, and oxygen in the air inlet cannot reach the air outlet, so that oxygen supply is closed.
Optionally, when the air inlet electromagnetic valve is opened and the air outlet electromagnetic valve is closed, oxygen at the air outlet enters the first cavity, the moving part overcomes the elasticity of the elastic part under the action of gas pressure in the first cavity, so that the moving part is separated from the shell, the second cavity is communicated with the air outlet, and the oxygen at the air inlet reaches the air outlet to complete oxygen supply.
Optionally, the controller obtains the oxygen supply target pressure based on the output signal of the height sensor; when the second pressure sensor detects that the pressure of the air outlet is far smaller than the oxygen supply target pressure, the output signal of the first pressure sensor is used as a feedback control quantity to adjust the oxygen supply pressure of the air outlet; when the pressure of the air outlet is close to the oxygen supply target pressure, the output signal of the second pressure sensor is used as a feedback control quantity, and the pressure of the air outlet is accurately controlled.
Optionally, when oxygen supply is started, when the output signal of the first pressure sensor is used for judging that the gas pressure in the first cavity is smaller than the target oxygen supply pressure, the controller controls the air inlet electromagnetic valve to be opened, the air outlet electromagnetic valve to be closed, oxygen in the air inlet flows into the first cavity, under the action of the gas pressure in the first cavity, the moving part overcomes the elastic force of the elastic part to move downwards and is separated from the shell, the second cavity is communicated with the air outlet, and the oxygen flows to the air outlet; and meanwhile, the first pressure sensor and the second pressure sensor detect the pressure of the first cavity and the pressure of the air outlet for closed-loop control.
Optionally, through the admission of a period of time, pressure in the first cavity continues to rise, promotes the moving part overcomes the elasticity of elastic component and continues to move downwards, and the clearance between moving part and the casing increases gradually for gas outlet pressure increases, and when judging that outlet pressure is higher than oxygen suppliment target pressure based on second pressure sensor's output signal, then controller control the solenoid valve of admitting air closes, and the solenoid valve of giving vent to anger is opened, deflates first cavity, makes the pressure in the first cavity reduce, moving part upward movement under the elastic action of elastic component, the clearance between moving part and the casing reduces gradually for gas outlet pressure reduces, simultaneously second pressure sensor detects the pressure of gas outlet and is used for the accurate control of gas outlet pressure.
Optionally, when the pressure of the gas outlet reaches the target oxygen supply pressure, the controller controls the gas inlet solenoid valve to close, the gas outlet solenoid valve to close, the gas pressure in the first cavity is maintained unchanged, the moving part is kept still under the action of the gas pressure in the first cavity and the elastic force of the elastic part, and the pressure of the gas outlet is kept stable.
Optionally, the moving part comprises a piston and an oxygen supply valve which are connected; the piston is partially located within the first cavity and partially located within the second cavity; the oxygen supply valve is positioned in the second cavity and is driven by the piston to control whether the second cavity is communicated with the air outlet or not.
In a second aspect, the invention provides a control method based on the aerial continuous oxygen supply pressure regulation and control system in the first aspect, which comprises the following steps:
the air inlet electromagnetic valve is closed, the air outlet electromagnetic valve is opened, the gas in the first cavity is discharged, the moving part is pressed on the shell under the action of the elastic force of the elastic part, the second cavity is not communicated with the air outlet, the oxygen in the air inlet cannot reach the air outlet, and the oxygen supply is closed;
open the solenoid valve of admitting air, close the solenoid valve of giving vent to anger, the oxygen of gas outlet department gets into first cavity, the elasticity of elastic component is overcome to the moving part under the effect of gas pressure in first cavity for moving part and casing separation, intercommunication between second cavity and the gas outlet, the oxygen of gas inlet reachs the gas outlet, accomplishes the oxygen suppliment.
Optionally, obtaining an oxygen supply target pressure based on an output signal of the height sensor by using a controller; when the second pressure sensor detects that the pressure of the air outlet is far smaller than the oxygen supply target pressure, the output signal of the first pressure sensor is used as a feedback control quantity to adjust the oxygen supply pressure of the air outlet; when the pressure of the air outlet is close to the oxygen supply target pressure, the output signal of the second pressure sensor is used as a feedback control quantity, and the pressure of the air outlet is accurately controlled.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the height sensor is used for acquiring a cabin height signal, the controller is used for automatically opening or closing oxygen supply according to oxygen supply requirements at different heights, the air inlet electromagnetic valve and the air outlet electromagnetic valve are driven to regulate oxygen supply pressure, and closed-loop control is performed according to values of the first pressure sensor and the second pressure sensor.
A double-pressure sensor feedback control mode is adopted, when the pressure of the air outlet is far smaller than the oxygen supply target pressure, the signal of the first pressure sensor is used as feedback control quantity, and the purpose of quickly adjusting the oxygen supply pressure is achieved; when the pressure of the air outlet is close to the oxygen supply target pressure, the signal of the second pressure sensor is used as a feedback control quantity, so that the aim of accurately controlling the pressure of the air outlet is fulfilled.
Drawings
In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic structural diagram of a high altitude continuous oxygen supply pressure regulation system according to an embodiment of the present invention;
wherein:
the device comprises a controller 1, a height sensor 2, an air inlet electromagnetic valve 3, an air outlet electromagnetic valve 4, a first pressure sensor 5, a second pressure sensor 6, a piston 7, an oxygen supply valve 8, a spring 9, a shell 10, an air inlet 11, an air outlet 12, a first cavity 13 and a second cavity 14.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of the invention.
The following detailed description of the principles of the invention is provided in connection with the accompanying drawings.
Example 1
The embodiment of the invention provides a high-altitude continuous oxygen supply pressure regulation and control system, as shown in figure 1, comprising: the device comprises a shell 10, an air inlet electromagnetic valve 3, an air outlet electromagnetic valve 4, a moving part, an elastic part 9, a height sensor 2, a first pressure sensor 5, a second pressure sensor 6 and a controller 1;
the shell 10 is provided with an air inlet 11, an air outlet 12, a first cavity 13 and a second cavity 14; in the actual production process, the first cavity 13 and the second cavity 14 are located between the air inlet 11 and the air outlet 12, the first cavity 13 and the second cavity 14 are oppositely arranged, and both are provided with through holes for moving the moving parts;
the air inlet electromagnetic valve 3 is arranged between the air inlet 11 and the first cavity 13, is respectively communicated with the air inlet 11 and the first cavity 13, and is used for introducing oxygen into the first cavity 13 to regulate the gas pressure in the first cavity 13;
the air outlet electromagnetic valve 4 is communicated with the first cavity 13 and is used for discharging oxygen in the first cavity 13 and adjusting the gas pressure in the first cavity 13;
the elastic element 9 is positioned in the second cavity 14;
the moving part is partially positioned in the first cavity 13, partially positioned in the second cavity 14 and connected with the elastic part 9, and is matched with the gas pressure in the first cavity 13 and the elastic part 9 to control whether the second cavity 14 is communicated with the gas outlet 12 or not; in a specific implementation of the embodiment of the invention, the moving part comprises a piston 7 and an oxygen supply valve 8 which are connected; the piston 7 is partially positioned in the first cavity 13 and partially positioned in the second cavity 14; the oxygen supply valve 8 is positioned in the second cavity 14, and is driven by the piston 7 to control whether the second cavity 14 is communicated with the air outlet 12;
the first pressure sensor 5 is connected with the first cavity 13; the second pressure sensor 6 is connected with the air outlet 12;
the height sensor 2 is used for acquiring a height signal of the cabin and providing a control basis for the controller 1;
controller 1 respectively with altitude sensor 2, first pressure sensor 5, second pressure sensor 6, air inlet solenoid valve 3 and the solenoid valve 4 of giving vent to anger link to each other, oxygen suppliment is opened or closed automatically according to the oxygen suppliment demand of different heights to controller 1, drives air inlet solenoid valve 3, gassing solenoid valve 4 carry out the oxygen suppliment pressure and adjust to carry out closed-loop control according to first pressure sensor 5, second pressure sensor 6's value.
The control method of the system in the embodiment of the invention specifically comprises the following steps: height information in the cabin is detected by a height sensor 2 (installed in the aircraft cabin) and is transmitted to a controller 1; when the height information acquired by the controller 1 reaches the oxygen supply height, the air inlet electromagnetic valve 3 and the air outlet electromagnetic valve 4 are controlled to adjust the oxygen supply pressure, and closed-loop adjustment is performed according to the feedback values of the first pressure sensor 5 and the second pressure sensor 6, so that automatic on/off oxygen supply control and oxygen supply pressure adjustment control are realized. Namely: the controller 1 obtains an oxygen supply target pressure based on the output signal of the height sensor 2; when the second pressure sensor 6 detects that the pressure at the air outlet 12 is far smaller than the target oxygen supply pressure, the output signal of the first pressure sensor 5 is used as a feedback control quantity to regulate the oxygen supply pressure at the air outlet 12; when the pressure of the air outlet 12 is close to the oxygen supply target pressure, the output signal of the second pressure sensor 6 is used as the feedback control quantity to finish the accurate control of the pressure of the air outlet 12, and finally, the double feedback control is realized.
Specifically, the method comprises the following steps: when the air inlet electromagnetic valve 3 is closed and the air outlet electromagnetic valve 4 is opened, the gas in the first cavity 13 is discharged, the moving part is pressed on the shell 10 under the elastic force action of the elastic part 9, the second cavity 14 is not communicated with the air outlet 12, the oxygen in the air inlet 11 cannot reach the air outlet 12, and the oxygen supply is closed. When the air inlet electromagnetic valve 3 is opened and the air outlet electromagnetic valve 4 is closed, oxygen at the air outlet 12 enters the first cavity 13, the moving part overcomes the elasticity of the elastic part 9 under the action of gas pressure in the first cavity 13, so that the moving part is separated from the shell 10, the second cavity 14 is communicated with the air outlet 12, and the oxygen in the air inlet 11 reaches the air outlet 12 to complete oxygen supply.
The following is a detailed description of the entire operation process with reference to the various components and control elements of the system.
When oxygen supply is started, and the controller base 1 judges that the gas pressure in the first cavity 13 is smaller than the oxygen supply target pressure based on the output signal of the first pressure sensor 5, the controller 1 controls the air inlet electromagnetic valve 3 to be opened, the air outlet electromagnetic valve 4 to be closed, the oxygen in the air inlet 11 flows into the first cavity 13, under the action of the gas pressure in the first cavity 13, the moving part overcomes the elasticity of the elastic part 9 to move downwards and is separated from the shell 10, the second cavity 14 is communicated with the air outlet 12, and the oxygen flows to the air outlet 12; meanwhile, the first pressure sensor 5 and the second pressure sensor 6 detect the pressure of the first cavity 13 and the pressure of the air outlet 12 for closed-loop control.
After a period of air inlet, the pressure in the first cavity 13 continuously rises to push the moving part to overcome the elastic force of the elastic part 9 and continuously move downwards, the gap between the moving part and the shell 10 gradually increases, so that the pressure of the air outlet 12 increases, when the outlet pressure is judged to be higher than the oxygen supply target pressure based on the output signal of the second pressure sensor 6, the controller 1 controls the air inlet electromagnetic valve 3 to be closed, the air outlet electromagnetic valve 4 is opened to deflate the first cavity 13, so that the pressure in the first cavity 13 is reduced, the moving part moves upwards under the elastic force of the elastic part 9, the gap between the moving part and the shell 10 gradually decreases, so that the pressure of the air outlet 12 is reduced, and meanwhile, the pressure of the air outlet 12 detected by the second pressure sensor 6 is used for accurately controlling the pressure of the air outlet 12.
When the pressure of the gas outlet 12 reaches the target oxygen supply pressure, the controller 1 controls the gas inlet electromagnetic valve 3 to be closed, the gas outlet electromagnetic valve 4 to be closed, the gas pressure in the first cavity 13 is kept unchanged, the moving part is kept still under the action of the gas pressure in the first cavity 13 and the elasticity of the elastic part 9, and the pressure of the gas outlet 12 is kept stable.
Example 2
The invention provides a control method based on a high-altitude continuous oxygen supply pressure regulation and control system in embodiment 1, which comprises the following steps:
the air inlet electromagnetic valve 3 is closed, the air outlet electromagnetic valve 4 is opened, the gas in the first cavity 13 is discharged, the moving part is pressed on the shell 10 under the action of the elastic force of the elastic part 9, the second cavity 14 is not communicated with the air outlet 12, the oxygen in the air inlet 11 cannot reach the air outlet 12, and the oxygen supply is closed;
the air inlet electromagnetic valve 3 is opened, the air outlet electromagnetic valve 4 is closed, oxygen at the air outlet 12 enters the first cavity 13, the moving part overcomes the elasticity of the elastic piece 9 under the action of gas pressure in the first cavity 13, so that the moving part is separated from the shell 10, the second cavity 14 is communicated with the air outlet 12, and oxygen in the air inlet 11 reaches the air outlet 12 to complete oxygen supply.
The control method of the system in the embodiment of the invention specifically comprises the following steps: height information in the cabin is detected by a height sensor 2 (installed in the aircraft cabin) and is transmitted to a controller 1; when the height information acquired by the controller 1 reaches the oxygen supply height, the air inlet electromagnetic valve 3 and the air outlet electromagnetic valve 4 are controlled to adjust the oxygen supply pressure, and closed-loop adjustment is performed according to the feedback values of the first pressure sensor 5 and the second pressure sensor 6, so that automatic on/off oxygen supply control and oxygen supply pressure adjustment control are realized. Namely: the controller 1 obtains an oxygen supply target pressure based on the output signal of the height sensor 2; when the second pressure sensor 6 detects that the pressure at the air outlet 12 is far smaller than the target oxygen supply pressure, the output signal of the first pressure sensor 5 is used as a feedback control quantity to regulate the oxygen supply pressure at the air outlet 12; when the pressure of the air outlet 12 is close to the oxygen supply target pressure, the output signal of the second pressure sensor 6 is used as the feedback control quantity to finish the accurate control of the pressure of the air outlet 12, and finally, the double feedback control is realized.
Specifically, the method comprises the following steps: when the air inlet electromagnetic valve 3 is closed and the air outlet electromagnetic valve 4 is opened, the gas in the first cavity 13 is discharged, the moving part is pressed on the shell 10 under the elastic force action of the elastic part 9, the second cavity 14 is not communicated with the air outlet 12, the oxygen in the air inlet 11 cannot reach the air outlet 12, and the oxygen supply is closed. When the air inlet electromagnetic valve 3 is opened and the air outlet electromagnetic valve 4 is closed, oxygen at the air outlet 12 enters the first cavity 13, the moving part overcomes the elasticity of the elastic part 9 under the action of gas pressure in the first cavity 13, so that the moving part is separated from the shell 10, the second cavity 14 is communicated with the air outlet 12, and the oxygen in the air inlet 11 reaches the air outlet 12 to complete oxygen supply.
The following is a detailed description of the entire operation process with reference to the various components and control elements of the system.
When oxygen supply is started, and the controller base 1 judges that the gas pressure in the first cavity 13 is smaller than the oxygen supply target pressure based on the output signal of the first pressure sensor 5, the controller 1 controls the air inlet electromagnetic valve 3 to be opened, the air outlet electromagnetic valve 4 to be closed, the oxygen in the air inlet 11 flows into the first cavity 13, under the action of the gas pressure in the first cavity 13, the moving part overcomes the elasticity of the elastic part 9 to move downwards and is separated from the shell 10, the second cavity 14 is communicated with the air outlet 12, and the oxygen flows to the air outlet 12; meanwhile, the first pressure sensor 5 and the second pressure sensor 6 detect the pressure of the first cavity 13 and the pressure of the air outlet 12 for closed-loop control.
After a period of air inlet, the pressure in the first cavity 13 continuously rises to push the moving part to overcome the elastic force of the elastic part 9 and continuously move downwards, the gap between the moving part and the shell 10 gradually increases, so that the pressure of the air outlet 12 increases, when the outlet pressure is judged to be higher than the oxygen supply target pressure based on the output signal of the second pressure sensor 6, the controller 1 controls the air inlet electromagnetic valve 3 to be closed, the air outlet electromagnetic valve 4 is opened to deflate the first cavity 13, so that the pressure in the first cavity 13 is reduced, the moving part moves upwards under the elastic force of the elastic part 9, the gap between the moving part and the shell 10 gradually decreases, so that the pressure of the air outlet 12 is reduced, and meanwhile, the pressure of the air outlet 12 detected by the second pressure sensor 6 is used for accurately controlling the pressure of the air outlet 12.
When the pressure of the gas outlet 12 reaches the target oxygen supply pressure, the controller 1 controls the gas inlet electromagnetic valve 3 to be closed, the gas outlet electromagnetic valve 4 to be closed, the gas pressure in the first cavity 13 is kept unchanged, the moving part is kept still under the action of the gas pressure in the first cavity 13 and the elasticity of the elastic part 9, and the pressure of the gas outlet 12 is kept stable.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a high altitude oxygen suppliment pressure regulation and control system in succession which characterized in that includes: the device comprises a shell, an air inlet electromagnetic valve, an air outlet electromagnetic valve, a moving part, an elastic part, a height sensor, a first pressure sensor, a second pressure sensor and a controller;
the shell is provided with an air inlet, an air outlet, a first cavity and a second cavity;
the air inlet electromagnetic valve is arranged between the air inlet and the first cavity and is respectively communicated with the air inlet and the first cavity;
the air outlet electromagnetic valve is communicated with the first cavity;
the elastic piece is positioned in the second cavity;
the moving part is partially positioned in the first cavity, partially positioned in the second cavity, connected with the elastic piece and matched with the gas pressure in the first cavity and the elastic piece to control whether the second cavity is communicated with the gas outlet or not;
the first pressure sensor is connected with the first cavity;
the second pressure sensor is connected with the air outlet;
the controller is respectively connected with the height sensor, the first pressure sensor, the second pressure sensor, the air inlet electromagnetic valve and the air outlet electromagnetic valve.
2. The high altitude continuous oxygen supply pressure regulation and control system according to claim 1, characterized in that: when the air inlet electromagnetic valve is closed and the air outlet electromagnetic valve is opened, the gas in the first cavity is discharged, the moving part is pressed on the shell under the elastic action of the elastic part, the second cavity is not communicated with the air outlet, and the oxygen in the air inlet cannot reach the air outlet, so that the oxygen supply is closed.
3. The high altitude continuous oxygen supply pressure regulation and control system according to claim 1, characterized in that: when the air inlet electromagnetic valve is opened and the air outlet electromagnetic valve is closed, oxygen at the air outlet enters the first cavity, the elastic force of the elastic piece is overcome by the moving part under the action of gas pressure in the first cavity, so that the moving part is separated from the shell, the second cavity is communicated with the air outlet, and the oxygen at the air inlet reaches the air outlet to complete oxygen supply.
4. The high altitude continuous oxygen supply pressure regulation and control system according to claim 1, characterized in that: the controller obtains an oxygen supply target pressure based on an output signal of the height sensor; when the second pressure sensor detects that the pressure of the air outlet is far smaller than the oxygen supply target pressure, the output signal of the first pressure sensor is used as a feedback control quantity to adjust the oxygen supply pressure of the air outlet; when the pressure of the air outlet is close to the oxygen supply target pressure, the output signal of the second pressure sensor is used as a feedback control quantity, and the pressure of the air outlet is accurately controlled.
5. The high altitude continuous oxygen supply pressure regulation and control system according to claim 4, characterized in that: when oxygen supply is started, when the gas pressure in the first cavity is judged to be smaller than the oxygen supply target pressure based on an output signal of the first pressure sensor, the controller controls the air inlet electromagnetic valve to be opened, the air outlet electromagnetic valve to be closed, oxygen in the air inlet flows into the first cavity, the moving part overcomes the elasticity of the elastic piece to move downwards under the action of the gas pressure in the first cavity and is separated from the shell, the second cavity is communicated with the air outlet, and the oxygen flows to the air outlet; and meanwhile, the first pressure sensor and the second pressure sensor detect the pressure of the first cavity and the pressure of the air outlet for closed-loop control.
6. The high altitude continuous oxygen supply pressure regulation and control system according to claim 4, characterized in that: through admitting air of a period of time, pressure in the first cavity lasts the rising, promotes the elasticity that the movable part overcome the elastic component continues to move down, and the clearance between movable part and the casing increases gradually for gas outlet pressure increases, judges that outlet pressure is higher than oxygen suppliment target pressure when the output signal based on second pressure sensor, then controller control the solenoid valve of admitting air closes, and the solenoid valve of giving vent to anger is opened, deflates first cavity, makes the pressure reduction in the first cavity, the movable part upwards moves under the elastic action of elastic component, and the clearance between movable part and the casing reduces gradually for gas outlet pressure reduces, simultaneously the pressure that second pressure sensor detected the gas outlet is used for the accurate control of gas outlet pressure.
7. The high altitude continuous oxygen supply pressure regulation and control system according to claim 4, characterized in that: when the pressure of the gas outlet reaches the oxygen supply target pressure, the controller controls the gas inlet electromagnetic valve to be closed, the gas outlet electromagnetic valve to be closed, the gas pressure in the first cavity is maintained to be unchanged, the moving part is kept to be still under the action of the gas pressure in the first cavity and the elasticity of the elastic part, and the pressure of the gas outlet is kept to be stable.
8. The high altitude continuous oxygen supply pressure regulation and control system according to claim 1, characterized in that: the moving part comprises a piston and an oxygen supply valve which are connected; the piston is partially located within the first cavity and partially located within the second cavity; the oxygen supply valve is positioned in the second cavity and is driven by the piston to control whether the second cavity is communicated with the air outlet or not.
9. A control method based on the high-altitude continuous oxygen supply pressure regulation and control system in claim 1, characterized by comprising the following steps: the air inlet electromagnetic valve is closed, the air outlet electromagnetic valve is opened, the gas in the first cavity is discharged, the moving part is pressed on the shell under the action of the elastic force of the elastic part, the second cavity is not communicated with the air outlet, the oxygen in the air inlet cannot reach the air outlet, and the oxygen supply is closed;
open the solenoid valve of admitting air, close the solenoid valve of giving vent to anger, the oxygen of gas outlet department gets into first cavity, the elasticity of elastic component is overcome to the moving part under the effect of gas pressure in first cavity for moving part and casing separation, intercommunication between second cavity and the gas outlet, the oxygen of gas inlet reachs the gas outlet, accomplishes the oxygen suppliment.
10. The high altitude continuous oxygen supply pressure regulation method according to claim 9, characterized in that: obtaining an oxygen supply target pressure based on an output signal of the height sensor by using a controller; when the second pressure sensor detects that the pressure of the air outlet is far smaller than the oxygen supply target pressure, the output signal of the first pressure sensor is used as a feedback control quantity to adjust the oxygen supply pressure of the air outlet; when the pressure of the air outlet is close to the oxygen supply target pressure, the output signal of the second pressure sensor is used as a feedback control quantity, and the pressure of the air outlet is accurately controlled.
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| CN115591140A (en) * | 2022-10-12 | 2023-01-13 | 中国航空工业集团公司西安飞机设计研究所（Cn） | Flow regulating device of aircraft parachuting oxygen supply device |
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