CN114275164B - 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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- CN114275164B CN114275164B CN202210052349.4A CN202210052349A CN114275164B CN 114275164 B CN114275164 B CN 114275164B CN 202210052349 A CN202210052349 A CN 202210052349A CN 114275164 B CN114275164 B CN 114275164B
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Abstract
The utility model 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 piece, 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 is matched with the gas pressure in the first cavity and the elastic piece 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 utility model can realize closed-loop regulation and control of high-altitude continuous oxygen supply pressure, and has high intelligent degree.
Description
Technical Field
The utility model 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
Aircraft cabins are generally classified as pressurized cabins and non-pressurized cabins. When the vehicle flies under no pressure, 3000 m-4000 m fly for a long time, and passengers can feel slightly anoxic and headache and tiredness; when the vehicle flies at 4500m, the vehicle occupant is moderately anoxic, and sleepiness, purple lips and nails and reduced vision judgment can occur; when flying above 6500m, the passengers are severely lack of oxygen, and the passengers can convulsion and lose consciousness until death. The aircraft oxygen supply equipment is used for supplying oxygen to aircraft passengers of a non-pressurized cabin, so that the requirement of flying at a height of about 4000m is met, the pressurized cabin generally does not need the oxygen supply equipment, but when the cabin is in a pressure failure, the aircraft descends and simultaneously needs to supply oxygen for a period of time for the passengers.
The Chinese patent application with publication number of CN211272968U discloses a mechanical oxygen supply automatic regulator, which comprises a regulator shell, an air valve component, a corrugated pipe component, a lung valve component and a film component, wherein an air cavity and an oxygen cavity which are isolated from each other are arranged in the regulator shell, one end of the regulator shell is provided with a mask joint which is used for being connected with an inhalation mask, the air valve component is arranged at the open end of the air cavity, the corrugated pipe component is arranged in the air cavity, the lung valve component is arranged at the inlet of the oxygen cavity, and the film component is arranged at the port of the oxygen cavity. Because the mechanical oxygen supply automatic regulator adopts mechanical oxygen supply, the oxygen supply machine is heavy and has low intelligent degree.
The Chinese patent application with publication number of CN108888881A discloses an emergency oxygen supply control method for civil aircraft, which adopts a pulse oxygen supply controller, and comprises a breathing cavity electromagnetic valve, a breathing pressure sensor and a height pressure sensor which are integrated on a circuit board, and performs power supply control on a latch structure of a putting mask; when the pressure of the high pressure sensor reaches an emergency threshold or an emergency instruction of the upper computer is received, the pulse oxygen supply controller controls the latch structure to put in the mask, then whether the data of the breathing pressure sensor in the mask reach the oxygen supply threshold is judged in real time, and when the data reach the oxygen supply threshold, the air source supply is started and oxygen is supplied through the breathing cavity electromagnetic valve. The controller controls the electromagnetic valve to supply oxygen delivery time and delivery quantity in a pulse mode, so that the oxygen supply quantity is accurately controlled. The control method has limited height adjustment adaptability, namely the adjustment capability is difficult to reach equivalence.
Disclosure of Invention
Aiming at the problems, the utility model provides a high-altitude continuous oxygen supply pressure regulation system and a high-altitude continuous oxygen supply pressure regulation method, which can realize high-altitude continuous oxygen supply pressure closed-loop regulation, and have the advantages of simple structure and high intelligent degree.
In order to achieve the technical purpose and achieve the technical effect, the utility model is realized by the following technical scheme:
in a first aspect, the present utility model provides a continuous oxygen supply pressure regulation system for high altitude, comprising: the device comprises a shell, an air inlet electromagnetic valve, an air outlet electromagnetic valve, a moving part, an elastic piece, 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 and connected with the elastic piece, and is 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 air in the first cavity is discharged, the moving part is pressed on the shell under the elastic action of the elastic piece, the second cavity is not communicated with the air outlet, the oxygen of the air inlet can not reach the air outlet, and the closing of the oxygen supply is completed.
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 the 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 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, so that the accurate control of the pressure of the air outlet is completed.
Optionally, 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 the 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 moves downwards against the elasticity of the elastic piece 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 air outlet and are used for closed-loop control.
Optionally, after a period of time of air intake, the pressure in the first cavity continuously rises, the motion part is pushed to overcome the elasticity of the elastic piece and continuously move downwards, the gap between the motion part and the shell is gradually increased, so that the air outlet pressure is increased, when the output signal based on the second pressure sensor judges that the outlet pressure is higher than the oxygen supply target pressure, the controller controls the air inlet electromagnetic valve to be closed, the air outlet electromagnetic valve to be opened, the first cavity is deflated, the pressure in the first cavity is reduced, the motion part moves upwards under the action of the elasticity of the elastic piece, the gap between the motion part and the shell is gradually reduced, the air outlet pressure is reduced, and meanwhile, the pressure of the air outlet detected by the second pressure sensor is used for precisely controlling the air outlet pressure.
Optionally, when the pressure of the air outlet reaches the oxygen supply target pressure, the controller controls the air inlet electromagnetic valve to be closed, the air outlet electromagnetic valve to be closed, the air pressure in the first cavity is kept unchanged, the moving part is kept motionless under the action of the air pressure in the first cavity and the elasticity of the elastic piece, and the pressure of the air outlet is kept stable.
Optionally, the moving part comprises a piston and an oxygen supply valve which are connected; the piston is partially positioned in the first cavity and partially positioned in the second cavity; the oxygen supply valve is positioned in the second cavity, and the piston drives the second cavity to control whether the second cavity is communicated with the air outlet.
In a second aspect, the present utility model provides a control method based on the high altitude continuous oxygen supply pressure regulation system in the first aspect, including:
closing the air inlet electromagnetic valve, opening the air outlet electromagnetic valve, discharging the air in the first cavity, pressing the moving part on the shell under the action of the elastic force of the elastic part, and ensuring that the second cavity is not communicated with the air outlet, and the oxygen of the air inlet cannot reach the air outlet to finish closing the oxygen supply;
opening the air inlet electromagnetic valve, closing the air outlet electromagnetic valve, enabling oxygen at the air outlet to enter the first cavity, overcoming the elasticity of the elastic piece by the moving part under the action of gas pressure in the first cavity, enabling the moving part to be separated from the shell, communicating the second cavity with the air outlet, enabling oxygen at the air inlet to reach the air outlet, and completing oxygen supply.
Optionally, obtaining, with a controller, 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, so that the accurate control of the pressure of the air outlet is completed.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model utilizes the height sensor to collect the cabin height signal, and utilizes the controller to automatically open or close the oxygen supply according to the oxygen supply demands of different heights, drives the air inlet electromagnetic valve and the air outlet electromagnetic valve to adjust the oxygen supply pressure, and performs closed-loop control according to the values of the first pressure sensor and the second pressure sensor.
When the pressure of the air outlet is far smaller than the target pressure of oxygen supply, the first pressure sensor signal is used as feedback control quantity, so that the aim of quickly regulating the pressure of oxygen supply is fulfilled; when the pressure of the air outlet is close to the oxygen supply target pressure, the second pressure sensor signal is used as a feedback control quantity, so that the purpose of accurately controlling the pressure of the air outlet is realized.
Drawings
In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments that are illustrated in the appended drawings, in which:
FIG. 1 is a schematic diagram of a system for regulating pressure of continuous oxygen supply in high altitude according to an embodiment of the present utility model;
wherein:
1a controller, 2 a height sensor, 3 an air inlet electromagnetic valve, 4 an air outlet electromagnetic valve, 5 a first pressure sensor, 6 a second pressure sensor, 7 a piston, 8 an oxygen supply valve, 9 a spring, 10 a shell, 11 an air inlet, 12 an air outlet, 13 a first cavity and 14-a second cavity.
Detailed Description
The present utility model will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the detailed description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the utility model.
The principle of application of the utility model is described in detail below with reference to the accompanying drawings.
Example 1
The embodiment of the utility model provides a high-altitude continuous oxygen supply pressure regulation system, as shown in fig. 1, comprising: a housing 10, an inlet solenoid valve 3, an outlet solenoid valve 4, a moving part, an elastic member 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, and the first cavity 13 and the second cavity 14 are oppositely arranged, and are provided with through holes for moving the moving part;
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 pressure of the air 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 pressure of air 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 piece 9, and is matched with the gas pressure in the first cavity 13 and the elastic piece 9 to control whether the second cavity 14 is communicated with the gas outlet 12 or not; in one embodiment of the present utility model, the moving part includes a piston 7 and an oxygen supply valve 8 connected to each other; 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 collecting a height signal of the cabin and providing a control basis for the controller 1;
the controller 1 is respectively connected with the height sensor 2, the first pressure sensor 5, the second pressure sensor 6, the air inlet electromagnetic valve 3 and the air outlet electromagnetic valve 4, the controller 1 automatically opens or closes oxygen supply according to oxygen supply requirements of different heights, drives the air inlet electromagnetic valve 3 and the air outlet electromagnetic valve 4 to adjust oxygen supply pressure, and performs closed-loop control according to values of the first pressure sensor 5 and the second pressure sensor 6.
The control method of the system in the embodiment of the utility model specifically comprises the following steps: detecting the height information in the cabin by using the height sensor 2 (installed in the cabin of the aircraft) and transmitting the detected height information to the 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 regulate the oxygen supply pressure, and closed-loop regulation is carried out according to the feedback values of the first pressure sensor 5 and the second pressure sensor 6, so that automatic opening/closing oxygen supply control and oxygen supply pressure regulation control are realized. Namely: the controller 1 obtains oxygen supply target pressure based on the output signal of the height sensor 2; when the second pressure sensor 6 detects that the pressure of the air outlet 12 is far smaller than the oxygen supply target pressure, the output signal of the first pressure sensor 5 is used as a feedback control quantity to adjust the oxygen supply pressure of 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 a feedback control quantity, so that the accurate control of the pressure of the air outlet 12 is finished, and finally, the double feedback control is realized.
Specifically: when the air inlet electromagnetic valve 3 is closed and the air outlet electromagnetic valve 4 is opened, the air in the first cavity 13 is discharged, the moving part is pressed on the shell 10 under the elastic action of the elastic piece 9, the second cavity 14 is not communicated with the air outlet 12, and the oxygen of the air inlet 11 cannot reach the air outlet 12, so that 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 the 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 at the air inlet 11 reaches the air outlet 12 to complete oxygen supply.
The following describes the overall operation in conjunction with the various components and control elements of the system.
When oxygen supply is started, and the controller 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, the moving part moves downwards against the elasticity of the elastic piece 9 under the action of the gas pressure in the first cavity 13 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; at the same time, the first pressure sensor 5 and the second pressure sensor 6 detect the pressure of the first cavity 13 and the air outlet 12 for closed-loop control.
After a period of time of air intake, the pressure in the first cavity 13 continuously rises to push the moving part to overcome the elasticity of the elastic piece 9 and continuously move downwards, the gap between the moving part and the shell 10 gradually increases to enable the pressure of the air outlet 12 to increase, when the output signal of the second pressure sensor 6 is based on judging that the outlet pressure is higher than the oxygen supply target pressure, the controller 1 controls the air inlet electromagnetic valve 3 to be closed, the air outlet electromagnetic valve 4 to be opened, the first cavity 13 is deflated to enable the pressure in the first cavity 13 to decrease, the moving part moves upwards under the elasticity of the elastic piece 9, the gap between the moving part and the shell 10 gradually decreases to enable the pressure of the air outlet 12 to decrease, and meanwhile, the second pressure sensor 6 detects the pressure of the air outlet 12 to be used for accurately controlling the pressure of the air outlet 12.
When the pressure of the air outlet 12 reaches the oxygen supply target pressure, the controller 1 controls the air inlet electromagnetic valve 3 to be closed, the air outlet electromagnetic valve 4 to be closed, the air pressure in the first cavity 13 is kept unchanged, the moving part is kept motionless under the action of the air pressure in the first cavity 13 and the elasticity of the elastic piece 9, and the pressure of the air outlet 12 is kept stable.
Example 2
The utility model provides a control method based on a high-altitude continuous oxygen supply pressure regulation system in an embodiment 1, which comprises the following steps:
closing the air inlet electromagnetic valve 3, opening the air outlet electromagnetic valve 4, discharging the air in the first cavity 13, pressing the moving part on the shell 10 under the elastic force of the elastic part 9, and ensuring that the second cavity 14 is not communicated with the air outlet 12, and the oxygen of the air inlet 11 cannot reach the air outlet 12 to finish closing the oxygen supply;
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 part 9 under the action of the air pressure in the first cavity 13, the moving part is separated from the shell 10, the second cavity 14 is communicated with the air outlet 12, and the oxygen at the air inlet 11 reaches the air outlet 12 to complete oxygen supply.
The control method of the system in the embodiment of the utility model specifically comprises the following steps: detecting the height information in the cabin by using the height sensor 2 (installed in the cabin of the aircraft) and transmitting the detected height information to the 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 regulate the oxygen supply pressure, and closed-loop regulation is carried out according to the feedback values of the first pressure sensor 5 and the second pressure sensor 6, so that automatic opening/closing oxygen supply control and oxygen supply pressure regulation control are realized. Namely: the controller 1 obtains oxygen supply target pressure based on the output signal of the height sensor 2; when the second pressure sensor 6 detects that the pressure of the air outlet 12 is far smaller than the oxygen supply target pressure, the output signal of the first pressure sensor 5 is used as a feedback control quantity to adjust the oxygen supply pressure of 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 a feedback control quantity, so that the accurate control of the pressure of the air outlet 12 is finished, and finally, the double feedback control is realized.
Specifically: when the air inlet electromagnetic valve 3 is closed and the air outlet electromagnetic valve 4 is opened, the air in the first cavity 13 is discharged, the moving part is pressed on the shell 10 under the elastic action of the elastic piece 9, the second cavity 14 is not communicated with the air outlet 12, and the oxygen of the air inlet 11 cannot reach the air outlet 12, so that 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 the 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 at the air inlet 11 reaches the air outlet 12 to complete oxygen supply.
The following describes the overall operation in conjunction with the various components and control elements of the system.
When oxygen supply is started, and the controller 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, the moving part moves downwards against the elasticity of the elastic piece 9 under the action of the gas pressure in the first cavity 13 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; at the same time, the first pressure sensor 5 and the second pressure sensor 6 detect the pressure of the first cavity 13 and the air outlet 12 for closed-loop control.
After a period of time of air intake, the pressure in the first cavity 13 continuously rises to push the moving part to overcome the elasticity of the elastic piece 9 and continuously move downwards, the gap between the moving part and the shell 10 gradually increases to enable the pressure of the air outlet 12 to increase, when the output signal of the second pressure sensor 6 is based on judging that the outlet pressure is higher than the oxygen supply target pressure, the controller 1 controls the air inlet electromagnetic valve 3 to be closed, the air outlet electromagnetic valve 4 to be opened, the first cavity 13 is deflated to enable the pressure in the first cavity 13 to decrease, the moving part moves upwards under the elasticity of the elastic piece 9, the gap between the moving part and the shell 10 gradually decreases to enable the pressure of the air outlet 12 to decrease, and meanwhile, the second pressure sensor 6 detects the pressure of the air outlet 12 to be used for accurately controlling the pressure of the air outlet 12.
When the pressure of the air outlet 12 reaches the oxygen supply target pressure, the controller 1 controls the air inlet electromagnetic valve 3 to be closed, the air outlet electromagnetic valve 4 to be closed, the air pressure in the first cavity 13 is kept unchanged, the moving part is kept motionless under the action of the air pressure in the first cavity 13 and the elasticity of the elastic piece 9, and the pressure of the air outlet 12 is kept stable.
The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (8)
1. 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 piece, 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 and connected with the elastic piece, and is 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;
the controller obtains 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, so that the accurate control of the pressure of the air outlet is completed.
2. The high-altitude continuous oxygen supply pressure regulation system according to claim 1, wherein: when the air inlet electromagnetic valve is closed and the air outlet electromagnetic valve is opened, the air 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 closing of oxygen supply is completed.
3. The high-altitude continuous oxygen supply pressure regulation system according to claim 1, wherein: when the air inlet electromagnetic valve is opened, 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 the air pressure in the first cavity, 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 system according to claim 1, wherein: 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 the 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 moves downwards against the elasticity of the elastic piece 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 air outlet and are used for closed-loop control.
5. The high-altitude continuous oxygen supply pressure regulation system according to claim 1, wherein: after a period of time of air intake, the pressure in the first cavity continuously rises, promotes the moving part overcomes the elasticity of elastic component and continues to move downwards, and the clearance between moving part and the casing gradually increases for the outlet pressure increases, when judging that the outlet pressure is higher than oxygen supply target pressure based on the output signal of second pressure sensor, then the controller control the air inlet solenoid valve is closed, and the air outlet solenoid valve is opened, deflates first cavity, makes the pressure in the first cavity reduce, the moving part upwards moves under the elasticity effect of elastic component, and the clearance between moving part and the casing gradually reduces, makes outlet pressure reduce, simultaneously the pressure of second pressure sensor detection gas outlet is used for the accurate control to gas outlet pressure.
6. The high-altitude continuous oxygen supply pressure regulation system according to claim 1, wherein: when the pressure of the air outlet reaches the oxygen supply target pressure, the controller controls the air inlet electromagnetic valve to be closed, the air outlet electromagnetic valve to be closed, the air pressure in the first cavity is kept unchanged, and the moving part is kept motionless under the action of the air pressure in the first cavity and the elasticity of the elastic piece, and the pressure of the air outlet is kept stable.
7. The high-altitude continuous oxygen supply pressure regulation system according to claim 1, wherein: the moving part comprises a piston and an oxygen supply valve which are connected; the piston is partially positioned in the first cavity and partially positioned in the second cavity; the oxygen supply valve is positioned in the second cavity, and the piston drives the second cavity to control whether the second cavity is communicated with the air outlet.
8. A control method based on the high-altitude continuous oxygen supply pressure regulation system in claim 1, comprising:
closing the air inlet electromagnetic valve, opening the air outlet electromagnetic valve, discharging the air in the first cavity, pressing the moving part on the shell under the action of the elastic force of the elastic part, and ensuring that the second cavity is not communicated with the air outlet, and the oxygen of the air inlet cannot reach the air outlet to finish closing the oxygen supply;
opening the air inlet electromagnetic valve, closing the air outlet electromagnetic valve, enabling oxygen at the air outlet to enter the first cavity, overcoming the elasticity of the elastic piece by the moving part under the action of gas pressure in the first cavity, enabling the moving part to be separated from the shell, communicating the second cavity with the air outlet, enabling oxygen at the air inlet to reach the air outlet, and completing oxygen supply.
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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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