Passenger time sequence oxygen supply system and oxygen supply method

Abstract

The invention discloses a passenger time sequence oxygen supply system and an oxygen supply method.The passenger time sequence oxygen supply system comprises an onboard power source, an electromagnetic lock door plate assembly, a time sequence oxygen supply control circuit board, a pull switch, an oxygen bottle, a power source adapter board, an electric explosion pressure reduction proportional valve set and an oxygen mask, and the output end of the oxygen bottle is connected with the oxygen mask through the electric explosion pressure reduction proportional valve set; an electromagnetic lock door plate assembly capable of opening the oxygen mask below is arranged below the oxygen mask, and the oxygen mask is connected with the power adapter plate through a pull switch; the airborne power supply is respectively connected with the electromagnetic lock door plate assembly, the time sequence oxygen supply control circuit board and the electric explosion pressure reduction proportional valve group through the power supply adapter board, and the time sequence oxygen supply control circuit board is connected with the electric explosion pressure reduction proportional valve group; according to the invention, the proportional valve at the oxygen bottle in the oxygen supply equipment can be controlled to be opened at different proportional opening degrees at different times according to time sequences, so that oxygen can be output at different flows at different time periods.

Description

Technical Field

[0001] The invention belongs to the technical field of onboard oxygen supply, and relates to a passenger sequential oxygen supply system and an oxygen supply method. Background Art

[0002] Oxygen supply equipment is used in airplanes, diving chambers, etc., to supply oxygen to passengers in emergency situations to protect the lives of passengers. It is usually controlled by a sequential oxygen supply control circuit to start and stop the oxygen supply equipment. The existing sequential oxygen supply control circuit outputs a control signal to the electric explosion valve at the oxygen cylinder in the oxygen supply equipment, so that the electric explosion valve is triggered to open the oxygen cylinder, thereby realizing oxygen supply to passengers. However, the existing oxygen supply equipment control circuit cannot flexibly adjust the oxygen flow rate output by the oxygen supply equipment according to different time periods. In actual use, the oxygen demand is often the highest in the early stage of an emergency, and after a period of time, the oxygen demand will gradually decrease. The existing oxygen supply equipment control circuit can only control the oxygen supply equipment to output oxygen at a constant flow rate, and does not flexibly control the oxygen supply flow rate of the oxygen supply equipment according to different oxygen supply requirements in different time periods.

[0003] Therefore, in view of the above-mentioned problems existing in the existing oxygen supply equipment control circuit, the present invention discloses a passenger sequential oxygen supply system and oxygen supply method. Summary of the invention

[0004] The object of the present invention is to provide a passenger sequential oxygen supply system and method, which can sequentially control the proportional valve at the oxygen cylinder in the oxygen supply equipment to open at different proportional openings at different times, so as to output oxygen at different flow rates at different time periods.

[0005] The present invention is achieved through the following technical solutions: A passenger sequential oxygen supply system comprises an onboard power supply, an electromagnetic lock door panel assembly, a sequential oxygen supply control circuit board, a pull-wire switch, an oxygen cylinder, a power adapter board, an electric explosion pressure reduction proportional valve group, and an oxygen mask, wherein the output end of the oxygen cylinder is connected to the oxygen mask through the electric explosion pressure reduction proportional valve group, an electromagnetic lock door panel assembly which can be opened to place the oxygen mask below is arranged below the oxygen mask, and the oxygen mask is connected to the power adapter board through the pull-wire switch; the onboard power supply is respectively connected to the electromagnetic lock door panel assembly, the sequential oxygen supply control circuit board, and the electric explosion pressure reduction proportional valve group through the power adapter board, and the sequential oxygen supply control circuit board is connected to the electric explosion pressure reduction proportional valve group.

[0006] In order to better realize the present invention, further, the timing oxygen supply control circuit board includes a clock source circuit, a timing conditioning circuit, a proportional valve control circuit, and a proportional valve drive circuit which are integrated on the oxygen supply control board and connected in sequence; the clock source circuit is used to generate a clock signal; the timing conditioning circuit is used to generate a timing pulse signal according to the clock signal obtained from the clock source circuit; the proportional valve control circuit is used to generate a voltage signal according to the timing pulse signal obtained from the timing conditioning circuit; the proportional valve drive circuit is used to generate a drive signal according to the voltage signal obtained from the proportional valve control circuit, and output it to the proportional valve.

[0007] In order to better realize the present invention, further, the clock source circuit includes a crystal oscillator unit and a frequency multiplication unit; the input end of the frequency multiplication unit is connected to the output end of the power adapter board and the output end of the crystal oscillator unit, and the output end of the frequency multiplication unit is connected to the input end of the timing conditioning circuit; the crystal oscillator unit is used to generate a clock signal; the frequency multiplication unit is used to generate multiple clock signals after frequency multiplication according to the set frequency multiplication coefficient.

[0008] In order to better realize the present invention, further, the timing conditioning circuit includes a first AND gate unit and a second AND gate unit; the input end of the first AND gate unit is connected to the output end of the frequency doubling unit, and the output end of the first AND gate unit outputs a first timing pulse signal to the input end of the proportional valve control circuit; the input end of the second AND gate unit is connected to the output end of the frequency doubling unit, and the output end of the second AND gate unit outputs a second timing pulse signal to the input end of the proportional valve control circuit.

[0009] In order to better implement the present invention, further, the proportional valve control circuit includes a first D trigger, a second D trigger, and an adder circuit; the input end of the first D trigger inputs a first timing pulse signal, and the output end of the first D trigger is connected to the input end of the adder circuit; the input end of the second D trigger inputs a second timing pulse signal, and the output end of the second D trigger is connected to the input end of the adder circuit; the output end of the adder circuit outputs a voltage signal to the proportional valve drive circuit.

[0010] In order to better implement the present invention, further, the proportional valve drive circuit includes an amplifier U11B, a transistor Q1, a Schottky diode D4, a resistor R22, and a capacitor C10; the positive input end of the amplifier U11B is connected to the output end of the adder circuit, the negative input end of the amplifier U11B is connected to the ground end through the resistor R22 and the capacitor C10 connected in sequence, and the output end of the amplifier U11B is connected to the base of the transistor Q1; the collector of the transistor Q1 is connected to the power adapter board, and the emitter of the transistor Q1 is connected to the proportional valve; the first end of the Schottky diode D4 is overlapped between the base of the transistor Q1 and the output end of the amplifier U11B, the second end of the Schottky diode D4 is overlapped between the emitter of the transistor Q1 and the proportional valve, and the third end of the Schottky diode is overlapped between the positive input end of the amplifier U11B and the proportional valve, and is connected to the ground end.

[0011] In order to better realize the present invention, further, the power adapter board includes a first power adapter unit, a second power adapter unit, a third power adapter unit, a fourth power adapter unit, and a fifth power adapter unit; the input end of the first power adapter unit inputs 28VDC on the machine, and the output end of the first power adapter unit outputs 15VDC to the timing oxygen supply control circuit board; the input end of the second power adapter unit inputs 28VDC on the machine, and the output end of the second power adapter unit outputs 2.5VDC to the timing oxygen supply control circuit board; the input end of the third power adapter unit inputs 28VDC on the machine, and the output end of the third power adapter unit is connected to the electromagnetic lock door panel assembly; the input end of the fourth power adapter unit inputs 28VDC on the machine, and the output end of the fourth power adapter unit is connected to the electric explosion pressure reducing proportional valve group.

[0012] In order to better realize the present invention, further, the electric explosion pressure reducing proportional valve group includes an electric explosion valve, a pressure reducing valve, and a proportional valve. The electric explosion valve is arranged corresponding to the exhaust nozzle of the oxygen cylinder, the air outlet end of the electric explosion valve is connected to the pressure reducing valve, and the air outlet end of the pressure reducing valve is connected to the proportional valve.

[0013] In order to better realize the present invention, further, the electromagnetic lock door panel assembly includes a lock tongue, an electromagnetic component, a manual component, a door panel, and a shell. The lock tongue is movably arranged inside the shell. A door panel that can be opened is arranged at the bottom of the oxygen mask. The lock tongue is used to lock the door panel. An electromagnetic component and a manual component are arranged on one side of the lock tongue. Both the electromagnetic component and the manual component can drive the lock tongue to unlock the door panel. The electromagnetic component is connected to the power adapter board.

[0014] A passenger sequential oxygen supply method is implemented based on a passenger sequential oxygen supply system, comprising the following steps: Step 1: After the power adapter board takes power from the onboard power supply, it outputs a control voltage to the electromagnetic lock door panel assembly, and the electromagnetic lock door panel assembly is opened to release the oxygen mask; Step 2: The passenger pulls the pull-wire switch, and the power adapter board is connected to the sequential oxygen supply control circuit board and the electric explosion pressure reduction proportional valve group, and outputs a control voltage to the sequential oxygen supply control circuit board and the electric explosion pressure reduction proportional valve group; the electric explosion pressure reduction proportional valve group is opened to connect the oxygen cylinder and the oxygen mask; Step 3. Use the timing oxygen supply control circuit board to adjust the flow rate of oxygen output by the electric explosion pressure reduction proportional valve group in real time according to the oxygen supply time. In the time period of 0-150s, adjust the opening of the electric explosion pressure reduction proportional valve group to the maximum, and output oxygen at a flow rate of not less than 3.12L / min; in the time period of 150-420s, control the opening of the electric explosion pressure reduction proportional valve group to decrease, and output oxygen at a flow rate of not less than 2.19L / min; after 420s, control the opening of the electric explosion pressure reduction proportional valve group to the minimum, and output oxygen at a flow rate of not less than 1.71L / min until the oxygen is exhausted.

[0015] Compared with the prior art, the present invention has the following advantages and beneficial effects: After the pull-wire switch is triggered, the present invention can connect the second relay, the third relay, and the fourth relay, thereby connecting the electric explosion valve controller to the onboard power supply, connecting the timing oxygen supply control circuit to the onboard power supply, and controlling the triggering of the electric explosion valve at the oxygen cylinder through the electric explosion valve controller, so that the oxygen cylinder is connected to supply oxygen; at the same time, the timing oxygen supply control circuit outputs different timing control signals to the proportional valve at the oxygen cylinder mouth based on different times, thereby controlling the proportional valve to open with different openings at different time periods, and finally realizing that the oxygen supply equipment supplies oxygen with different flow rates at different time periods. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the passenger sequential oxygen supply system; Figure 2 This is a side view from above of the passenger sequential oxygen supply system; Figure 3 This is a top-down side view of the passenger sequential oxygen supply system; Figure 4 It is a structural schematic diagram of the electromagnetic lock door panel assembly; Figure 5 This is the front view of the electric explosion pressure reducing proportional valve group; Figure 6 It is a top view of the electric explosion pressure reducing proportional valve group; Figure 7 A schematic diagram of the circuit architecture of the passenger sequential oxygen supply system; Figure 8 This is a schematic diagram of the circuit principle of the power adapter board; Fig. 9This is a schematic diagram of the clock source circuit principle; Fig.10 This is a schematic diagram of the timing conditioning circuit principle; Fig.11 It is the schematic diagram of proportional valve control circuit principle; Fig.12 This is a schematic diagram of the proportional valve drive circuit principle.

[0017] Among them: 1-aircraft power supply; 2-electromagnetic lock door panel assembly; 3-timing oxygen supply control circuit board; 4-pull switch; 5-oxygen cylinder; 6-power adapter board; 7-electric explosion pressure reduction proportional valve group; 8-oxygen mask; 21-lock tongue; 22-electromagnetic assembly; 23-manual assembly; 24-door panel; 221-spring; 222-electromagnet; 223-magnetic sheet; 231-rocker arm; 71-electric explosion valve; 72-pressure reducing valve; 73-proportional valve. DETAILED DESCRIPTION

[0018] The following detailed descriptions are all illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0019] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the present invention explicitly states otherwise, singular forms are also intended to include plural forms. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0020] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0021] Terminology explanation section: The terms "install", "connect", "connect", "fixed" and the like in the present invention should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements, or an interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0022] Embodiment 1: A passenger sequential oxygen supply system of this embodiment, such as Figure 1-Figure 3 As shown, it includes an onboard power supply 1, an electromagnetic lock door panel assembly 2, a timing oxygen supply control circuit board 3, a pull-wire switch 4, an oxygen cylinder 5, a power adapter board 6, an electric explosion pressure reduction proportional valve group 7, and an oxygen mask 8. The output end of the oxygen cylinder 5 is connected to the oxygen mask 8 through the electric explosion pressure reduction proportional valve group 7, and an electromagnetic lock door panel assembly 2 that can be opened to place the oxygen mask 8 is arranged below the oxygen mask 8. The oxygen mask 8 is connected to the power adapter board 6 through the pull-wire switch 4; the onboard power supply 1 is respectively connected to the electromagnetic lock door panel assembly 2, the timing oxygen supply control circuit board 3, and the electric explosion pressure reduction proportional valve group 7 through the power adapter board 6, and the timing oxygen supply control circuit board 3 is connected to the electric explosion pressure reduction proportional valve group 7.

[0023] The timing oxygen supply control circuit board 3 includes a clock source circuit, a timing conditioning circuit, a proportional valve control circuit, and a proportional valve drive circuit which are integrated on the oxygen supply control board and connected in sequence; the clock source circuit is used to generate a clock signal; the timing conditioning circuit is used to generate a timing pulse signal according to the clock signal obtained from the clock source circuit; the proportional valve control circuit is used to generate a voltage signal according to the timing pulse signal obtained from the timing conditioning circuit; the proportional valve drive circuit is used to generate a drive signal according to the voltage signal obtained from the proportional valve control circuit, and output it to the proportional valve.

[0024] Embodiment 2: A passenger sequential oxygen supply system is improved on the basis of Example 1, such as Figure 7 As shown, the clock source circuit includes a crystal oscillator unit and a frequency multiplication unit; the input end of the frequency multiplication unit is connected to the output end of the power adapter board and the output end of the crystal oscillator unit, and the output end of the frequency multiplication unit is connected to the input end of the timing conditioning circuit; the crystal oscillator unit is used to generate a clock signal; the frequency multiplication unit is used to generate multiple clock signals after frequency multiplication according to the set frequency multiplication coefficient.

[0025] Working principle: Clock source circuit, the principle is as follows Fig. 9 As shown, after the oxygen supply control board is powered on, the integrated IC chips U5-U6 multiply the 32.768K signal provided by the crystal oscillator and output various required clock signals. In this embodiment, the IC chip U5 is a CD4060BM counter chip, and the IC chip U6 is a CD4020BNSR counter chip.

[0026] like Fig. 9 As shown, the crystal oscillator unit includes a crystal oscillator Y1, a capacitor C7, a capacitor C8, a resistor R3, and a resistor R4; the frequency multiplication unit includes an IC chip U5, an IC chip U6, a capacitor C9, and a resistor R5.

[0027] The timing conditioning circuit includes a first AND gate unit and a second AND gate unit; the input end of the first AND gate unit is connected to the output end of the frequency multiplication unit, and the output end of the first AND gate unit outputs a first timing pulse signal to the input end of the proportional valve control circuit; the input end of the second AND gate unit is connected to the output end of the frequency multiplication unit, and the output end of the second AND gate unit outputs a second timing pulse signal to the input end of the proportional valve control circuit.

[0028] Working principle: Fig.10 As shown, the clock signal generated by the clock source circuit is input into the timing conditioning circuit. The timing conditioning circuit converts the clock signal into a timing signal after 150 seconds, or 2 and a half minutes, and a timing signal after 420 seconds, or 7 minutes, which is required for 58 minutes of oxygen supply conditioning.

[0029] The timing conditioning circuit provided in this embodiment includes AND gate U7A, AND gate U7B, AND gate U7C, AND gate U8A, AND gate U8B, and AND gate U8C, and all adopt 74HC08 chip.

[0030] The proportional valve control circuit includes a first D flip-flop, a second D flip-flop, and an adder circuit; a first timing pulse signal is input into the input end of the first D flip-flop, and an output end of the first D flip-flop is connected to the input end of the adder circuit; a second timing pulse signal is input into the input end of the second D flip-flop, and an output end of the second D flip-flop is connected to the input end of the adder circuit; and an output end of the adder circuit outputs a voltage signal to the proportional valve drive circuit.

[0031] Working principle: The functional principle of the proportional valve control circuit is as follows: Fig.11 As shown, the timing pulse signal controls the input voltage of the adder circuit composed of the operational amplifier through the D flip-flop, so as to achieve the purpose of controlling the amplitude of the voltage output to the proportional valve drive circuit.

[0032] When the oxygen supply control board is powered on, U10A, U10B, and U10C all have outputs. At this time, the driving voltage amplitude of the proportional valve is the maximum value, so that the passengers can get oxygen at a rate of not less than 3.12L / min. After 150 seconds, i.e. two and a half minutes, the output of U9A is turned off, the output voltage of the U10B branch becomes 0, and the driving voltage amplitude of the proportional valve is reduced, so that the passengers can get oxygen at a rate of not less than 2.19L / min. 420S, or seven minutes later, the output of U9B is turned off, the output voltage of the U10C branch becomes 0, and the driving voltage amplitude of the proportional valve is reduced, so that the passengers can get oxygen at a rate of not less than 1.71L / min until all the oxygen in the oxygen cylinder is exhausted.

[0033] The proportional valve driving circuit includes an amplifier U11B, a transistor Q1, a Schottky diode D4, a resistor R22, and a capacitor C10; the positive input terminal of the amplifier U11B is connected to the output terminal of the adder circuit, the negative input terminal of the amplifier U11B is connected to the ground terminal through the resistor R22 and the capacitor C10 connected in sequence, and the output terminal of the amplifier U11B is connected to the base of the transistor Q1; the collector of the transistor Q1 is connected to the power adapter board, and the emitter of the transistor Q1 is connected to the proportional valve; the first end of the Schottky diode D4 is lapped between the base of the transistor Q1 and the output terminal of the amplifier U11B, the second end of the Schottky diode D4 is lapped between the emitter of the transistor Q1 and the proportional valve, and the third end of the Schottky diode is lapped between the positive input terminal of the amplifier U11B and the proportional valve, and is connected to the ground terminal.

[0034] Working principle: The proportional valve drive circuit provided in this embodiment is as follows: Fig.12 As shown, the proportional valve drive circuit converts the voltage signal transmitted from the proportional valve control voltage conditioning and distribution circuit into a drive signal to control the operation of the proportional valve.

[0035] The other parts of this embodiment are the same as those of Embodiment 1, and thus will not be described in detail.

[0036] Embodiment 3: A passenger sequential oxygen supply system, improved on the basis of embodiment 1 or 2, such as Figure 8 As shown, the power adapter board 6 includes a first power adapter unit, a second power adapter unit, a third power adapter unit, a fourth power adapter unit, and a fifth power adapter unit; the input end of the first power adapter unit inputs 28VDC on the machine, and the output end of the first power adapter unit outputs 15VDC to the timing oxygen supply control circuit board 3; the input end of the second power adapter unit inputs 28VDC on the machine, and the output end of the second power adapter unit outputs 2.5VDC to the timing oxygen supply control circuit board 3; the input end of the third power adapter unit inputs 28VDC on the machine, and the output end of the third power adapter unit is connected to the electromagnetic lock door panel assembly 2; the input end of the fourth power adapter unit inputs 28VDC on the machine, and the output end of the fourth power adapter unit is connected to the electric explosion pressure reduction proportional valve group 7.

[0037] The first power adapter unit includes a capacitor C1, a capacitor C2, an inductor L1, and a chip U1; the input end of the chip U1 is connected to the 28VDC power supply provided by the onboard power supply 1 through the inductor L1, and the output end of the chip U1 outputs 15VDC to the input end of the timing oxygen supply control circuit board 3; one end of the capacitor C1 is connected between the inductor L1 and the 28VDC power supply provided by the onboard power supply 1, and the other end of the capacitor C1 is connected between the ground end of the chip U1 and the ground end of the 28VDC power supply provided by the onboard power supply 1; one end of the capacitor C2 is connected between the inductor L1 and the input end of the chip U1, and the other end of the capacitor C1 is connected between the ground end of the chip U1 and the capacitor C1.

[0038] The second power adapter unit includes a chip U2, a capacitor C5, a capacitor C6, and an inductor L2; the input end of the chip U2 is connected to the 28VDC power supply provided by the onboard power supply 1 through the inductor L2, and the output end of the chip U2 outputs 2.5VDC to the input end of the timing oxygen supply control circuit board 3; one end of the capacitor C5 is connected between the inductor L2 and the 28VDC power supply provided by the onboard power supply 1, and the other end of the capacitor C5 is connected between the ground end of the chip U2 and the ground end of the 28VDC power supply provided by the onboard power supply 1; one end of the capacitor C6 is connected between the inductor L2 and the input end of the chip U2, and the other end of the capacitor C5 is connected between the ground end of the chip U1 and the capacitor C5.

[0039] The third power adapter unit includes a first delay unit and a relay K1; the input end of the relay K1 is connected to the 28VDC power supply provided by the onboard power supply 1, and the output end of the relay K1 is connected to the electromagnetic lock door panel assembly 2; one end of the first delay unit is overlapped between the input end of the relay K1 and the 28VDC power supply provided by the onboard power supply 1, and the other end of the first delay unit is overlapped between the output end of the relay K1 and the electromagnetic lock door panel assembly 2.

[0040] The fourth power adapter unit includes a second delay unit, a relay K2, and a relay K3; the input end of the relay K2 is connected to the pull-wire switch 4, and the output end of the relay K2 is connected to the relay K3; one end of the first delay unit is overlapped between the output end of the relay K2 and the input end of the relay K3, and the other end of the second delay unit is overlapped between the output end of the relay K3 and the electric explosion pressure reducing proportional valve group 7.

[0041] Working principle: The power adapter board 6 is used to convert the 28VDC power provided by the onboard power supply 1 to provide a control voltage signal for controlling the electromagnetic lock door panel assembly 2, the timing oxygen supply control circuit board 3, and the electric explosion pressure reduction proportional valve group 7.

[0042] Oxygen mask release function: After the system is powered on, the 28VDC power supply signal on the aircraft is transmitted to the electromagnetic lock door panel assembly 2 through the relay K1. At this time, the electromagnetic lock door panel assembly 2 opens the panel at the bottom of the oxygen mask 8 to make the oxygen mask 8 fall. At the same time, the delay circuit composed of the resistor R1, the capacitor C3, and U3 makes the delay of no more than 5 seconds after the 28VDC power supply signal on the aircraft is powered on, and connects U3 to close the relay K1, disconnecting the power supply of the electromagnetic lock door panel assembly 2, so that the panel at the bottom of the oxygen mask 8 is in a normally open state.

[0043] Preferably, U3 and U4 in the delay circuit of this embodiment are LBSS123LT1G field effect transistors.

[0044] Start the oxygen supply function: After the system is powered on, the 28VDC on the machine is converted into the 2.5VDC voltage required for the electric explosion valve to perform electric explosion through U2. At this time, since the pull-wire switch 4 remains in the disconnected state, the relay K2 is not closed, and the 2.5VDC voltage is temporarily not transmitted to the electric explosion pressure reduction proportional valve group 7. When the pull-wire switch 4 is turned on, the relay K2 is closed, and the 2.5VDC voltage is transmitted to the electric explosion pressure reduction proportional valve group 7 through the normally closed end of the relay K3, so that the electric explosion pressure reduction proportional valve group 7 explodes to open the outlet of the oxygen cylinder 5. At this time, the oxygen cylinder 5 transmits oxygen to the oxygen mask 8 through the electric explosion pressure reduction proportional valve group 7. After the relay K2 is closed, the delay circuit composed of R2, C4, and U4 causes the relay K3 to close within 5.5 seconds after the relay K2 is closed, and the 2.5VDC voltage transmitted to the electric explosion pressure reduction proportional valve group 7 is disconnected.

[0045] Preferably, U2 in this embodiment is a R-78B2.5-2.0 non-isolated DC / DC converter.

[0046] Sequential oxygen supply control function: After the system is powered on, the 28VDC on the machine is converted to 15VDC through U1, and converted to 2.5VDC through U2. The 15VDC and 2.5VDC voltages are all output to the power input end of the sequential oxygen supply control circuit board 3 to enable it to work normally. When the pull-wire switch 4 is turned on, the relay K2 is closed, disconnecting the 15VDC input to the power input end of the sequential oxygen supply control circuit board 3, so that the timing circuit on the sequential oxygen supply control circuit board 3 is reset. After the relay K2 is closed, the delay circuit composed of R2, C4, and U4 makes the relay K3 close within 5.5 seconds after the relay K2 is closed, and 15VDC is re-delivered to the power input end of the sequential oxygen supply control circuit board 3, so that the power input end of the sequential oxygen supply control circuit board 3 works normally. By setting different delays, the sequential oxygen supply control circuit board 3 controls the electric explosion pressure reduction proportional valve group 7 to open with different openings in different time periods, thereby realizing the delivery of oxygen to the oxygen mask 8 at different oxygen supply flow rates in different time periods.

[0047] Preferably, in this embodiment, U1 is a TSR05-24150 DC / DC converter.

[0048] The other parts of this embodiment are the same as those of Embodiment 1 or 2, and thus will not be described in detail.

[0049] Embodiment 4: A passenger sequential oxygen supply system, improved on the basis of any one of embodiments 1-3, such as Figure 5 , Figure 6 As shown, the electric explosion pressure reducing proportional valve group 7 includes an electric explosion valve 71, a pressure reducing valve 72, and a proportional valve 73. The electric explosion valve 71 is arranged corresponding to the exhaust nozzle of the oxygen cylinder 5, and the air outlet end of the electric explosion valve 71 is connected to the pressure reducing valve 72, and the air outlet end of the pressure reducing valve 72 is connected to the proportional valve 73. After the pull-wire switch 4 is turned on, the electric explosion valve 71, the pressure reducing valve 72, and the proportional valve 73 are all connected to the airborne power supply 1. At this time, the electric explosion valve 71 explodes and opens the exhaust nozzle at the bottle mouth of the oxygen cylinder 5, and the oxygen output by the oxygen cylinder 5 is successively delivered to the oxygen mask 8 through the pressure reducing valve 72 and the proportional valve 73. The oxygen supply pressure is reduced to 0.35-0.85Mpa by the pressure reducing valve 72, and then the oxygen supply flow rate is adjusted according to the oxygen supply time point by the proportional valve 73, specifically: During the time period of 0-150s, the opening of the proportional valve 73 is the largest, and oxygen is output at a flow rate of not less than 3.12L / min. During the time period of 150-420s, the opening of the proportional valve 73 is reduced, and oxygen is output at a flow rate of not less than 2.19L / min. After 420s, the opening of the proportional valve 73 is the smallest, and oxygen is output at a flow rate of not less than 1.71L / min until the oxygen is exhausted.

[0050] The other parts of this embodiment are the same as any one of Embodiments 1-3, so they are not described again.

[0051] Embodiment 5: A passenger sequential oxygen supply system, improved on the basis of any one of embodiments 1-4, such as Figure 2 and Figure 4 As shown, the electromagnetic lock door panel assembly 2 includes a lock tongue 21, an electromagnetic assembly 22, a manual assembly 23, a door panel 24, and a shell. The lock tongue 21 is movably arranged inside the shell. A door panel 24 that can be opened is arranged at the bottom of the oxygen mask 8. The lock tongue 21 is used to lock the door panel 24. An electromagnetic assembly 22 and a manual assembly 23 are arranged on one side of the lock tongue 21. Both the electromagnetic assembly 22 and the manual assembly 23 can drive the lock tongue 21 to unlock the door panel 24. The electromagnetic assembly 22 is connected to the power adapter board 6.

[0052] After the electromagnetic assembly 22 is connected to the onboard power supply 1, a magnetic force is generated to drive the lock tongue 21 to retract, so that the lock tongue 21 is separated from the lock hole on the door panel 24, thereby unlocking the door panel 24. At the same time, a manual assembly 23 is also provided. When the electromagnetic assembly 22 fails, the passenger can manually operate the manual assembly 23 to drive the lock tongue 21 to retract, thereby manually opening the door panel 24.

[0053] Further, such as Figure 4 As shown, the electromagnetic assembly 22 includes a housing, a spring 221, an electromagnet 222, and a magnetic sheet 223. A lock tongue 21 is slidably arranged inside the housing, and a spring 221 is sleeved outside the lock tongue 21. The end of the lock tongue 51 close to the door panel 24 is docked with the door panel 24, and the end of the lock tongue 21 away from the door panel 24 is provided with a magnetic sheet 223. An electromagnet 222 is arranged on one side of the magnetic sheet 223, and the electromagnet 222 is connected to the onboard power supply 1 through a pull-wire switch 4. A sliding cavity is arranged inside the housing, and a lock tongue 21 is slidably arranged inside the sliding cavity. One end of the lock tongue 21 is correspondingly plugged into the lock opening on the door panel 24, and a spring 221 is arranged between the other end of the lock tongue 21 and the sliding cavity. When the electromagnet 222 is disconnected, the lock tongue 21 is firmly inserted into the lock opening under the elastic force of the spring 221 to keep the door panel 24 in a closed state. After the electromagnet 222 is connected to the onboard power supply, the electromagnet 222 generates the same magnetism as the magnetic sheet 223 to repel the magnetic sheet 223, and then drives the lock tongue 21 through the magnetic sheet 223 to overcome the elastic force of the spring 221 and move in a direction away from the door panel 24, finally disengaging the lock tongue 21 from the lock port, thereby unlocking the door panel 24.

[0054] Further, such as Figure 4 As shown, the manual assembly 23 includes a rocker arm 231, which is rotatably arranged on one side of the lock tongue 21, and a bayonet is arranged on the rocker arm 231, and the bayonet is engaged with one end of the lock tongue 21. The middle part of the rocker arm 231 is rotatably connected to the housing through a rotating pin, one end of the rocker arm 231 extends to the outside of the housing for manual operation by the passenger, and the other end of the rocker arm 231 is provided with a bayonet, and the diameter of the bayonet is larger than the diameter of the lock tongue 21. When the passenger manually rotates the rocker arm 231, the bayonet is engaged with the side wall of the lock tongue 21 and drives the lock tongue 21 to move until the lock tongue 21 is disengaged from the lock port on the door panel 24 and unlocked.

[0055] The other parts of this embodiment are the same as any one of Embodiments 1-4, so they are not described again.

[0056] Embodiment 6: A passenger sequential oxygen supply method is implemented based on the passenger sequential oxygen supply system described in any one of embodiments 1-5, comprising the following steps: Step 1, after the power adapter board 6 takes power from the onboard power supply 1, it outputs a control voltage to the electromagnetic lock door panel assembly 2, and the electromagnetic lock door panel assembly 2 is opened to place the oxygen mask 8; Step 2: The passenger pulls the pull-wire switch 4, the power adapter board 6 is connected with the sequential oxygen supply control circuit board 3 and the electric explosion pressure reduction proportional valve group 7, and outputs a control voltage to the sequential oxygen supply control circuit board 3 and the electric explosion pressure reduction proportional valve group 7; the electric explosion pressure reduction proportional valve group 7 is opened to connect the oxygen cylinder 5 and the oxygen mask 8; Step 3, through the timing oxygen supply control circuit board 3, the flow rate of oxygen output by the electric explosion decompression proportional valve group 7 is adjusted in real time according to the oxygen supply time. In the time period of 0-150s, the opening of the electric explosion decompression proportional valve group 7 is adjusted to the maximum, and oxygen is output at a flow rate of not less than 3.12L / min; in the time period of 150-420s, the opening of the electric explosion decompression proportional valve group 7 is controlled to be reduced, and oxygen is output at a flow rate of not less than 2.19L / min; after 420s, the opening of the electric explosion decompression proportional valve group 7 is controlled to be the minimum, and oxygen is output at a flow rate of not less than 1.71L / min until the oxygen is exhausted.

[0057] The other parts of this embodiment are the same as any one of Embodiments 1-5, so they are not described again.

[0058] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention fall within the protection scope of the present invention.

Claims

1. A passenger sequential oxygen supply system, characterized in that: The invention comprises an onboard power supply (1), an electromagnetic lock door panel assembly (2), a sequential oxygen supply control circuit board (3), a pull-wire switch (4), an oxygen cylinder (5), a power adapter board (6), an electric explosion pressure reduction proportional valve group (7), and an oxygen mask (8); the output end of the oxygen cylinder (5) is connected to the oxygen mask (8) via the electric explosion pressure reduction proportional valve group (7); an electromagnetic lock door panel assembly (2) capable of being opened to place the oxygen mask (8) is arranged below the oxygen mask (8); the oxygen mask (8) is connected to the power adapter board (6) via the pull-wire switch (4); the onboard power supply (1) is respectively connected to the electromagnetic lock door panel assembly (2), the sequential oxygen supply control circuit board (3), and the electric explosion pressure reduction proportional valve group (7) via the power adapter board (6); and the sequential oxygen supply control circuit board (3) is connected to the electric explosion pressure reduction proportional valve group (7).

2. A passenger sequential oxygen supply system according to claim 1, characterized in that: The sequential oxygen supply control circuit board (3) comprises a clock source circuit, a sequential adjustment circuit, a proportional valve control circuit, and a proportional valve drive circuit which are integrated on the oxygen supply control board and connected in sequence; the clock source circuit is used to generate a clock signal; the sequential adjustment circuit is used to generate a sequential pulse signal according to the clock signal obtained from the clock source circuit; The proportional valve control circuit is used to generate a voltage signal according to the timing pulse signal obtained from the timing conditioning circuit; the proportional valve drive circuit is used to generate a drive signal according to the voltage signal obtained from the proportional valve control circuit and output it to the proportional valve.

3. A passenger sequential oxygen supply system according to claim 1, characterized in that: The clock source circuit includes a crystal oscillator unit and a frequency multiplication unit; the input end of the frequency multiplication unit is connected to the output end of the power adapter board and the output end of the crystal oscillator unit, and the output end of the frequency multiplication unit is connected to the input end of the timing conditioning circuit; the crystal oscillator unit is used to generate a clock signal; the frequency multiplication unit is used to generate multiple clock signals after frequency multiplication according to the set frequency multiplication coefficient.

4. A passenger sequential oxygen supply system according to claim 1, characterized in that: The timing conditioning circuit includes a first AND gate unit and a second AND gate unit; the input end of the first AND gate unit is connected to the output end of the frequency multiplication unit, and the output end of the first AND gate unit outputs a first timing pulse signal to the input end of the proportional valve control circuit; the input end of the second AND gate unit is connected to the output end of the frequency multiplication unit, and the output end of the second AND gate unit outputs a second timing pulse signal to the input end of the proportional valve control circuit.

5. A passenger sequential oxygen supply system according to claim 1, characterized in that: The proportional valve control circuit comprises a first D flip-flop, a second D flip-flop, and an adder circuit; the first timing pulse signal is input to the input end of the first D flip-flop, and the output end of the first D flip-flop is connected to the input end of the adder circuit; The second timing pulse signal is input to the input end of the second D flip-flop, and the output end of the second D flip-flop is connected to the input end of the adder circuit; the output end of the adder circuit outputs a voltage signal to the proportional valve drive circuit.

6. A passenger sequential oxygen supply system according to claim 1, characterized in that: The proportional valve driving circuit includes an amplifier U11B, a transistor Q1, a Schottky diode D4, a resistor R22, and a capacitor C10; the positive input terminal of the amplifier U11B is connected to the output terminal of the adder circuit, the negative input terminal of the amplifier U11B is connected to the ground terminal through the resistor R22 and the capacitor C10 connected in sequence, and the output terminal of the amplifier U11B is connected to the base of the transistor Q1; the collector of the transistor Q1 is connected to the power adapter board, and the emitter of the transistor Q1 is connected to the proportional valve; the first end of the Schottky diode D4 is lapped between the base of the transistor Q1 and the output terminal of the amplifier U11B, the second end of the Schottky diode D4 is lapped between the emitter of the transistor Q1 and the proportional valve, and the third end of the Schottky diode is lapped between the positive input terminal of the amplifier U11B and the proportional valve, and is connected to the ground terminal.

7. A passenger sequential oxygen supply system according to any one of claims 1 to 6, characterized in that: The power adapter board (6) comprises a first power adapter unit, a second power adapter unit, a third power adapter unit, a fourth power adapter unit, and a fifth power adapter unit; the input end of the first power adapter unit inputs 28VDC on the machine, and the output end of the first power adapter unit outputs 15VDC to the sequential oxygen supply control circuit board (3); the input end of the second power adapter unit inputs 28VDC on the machine, and the output end of the second power adapter unit outputs 2.5VDC to the sequential oxygen supply control circuit board (3); the input end of the third power adapter unit inputs 28VDC on the machine, and the output end of the third power adapter unit is connected to the electromagnetic lock door panel assembly (2); the input end of the fourth power adapter unit inputs 28VDC on the machine, and the output end of the fourth power adapter unit is connected to the electric explosion pressure reduction proportional valve group (7).

8. A passenger sequential oxygen supply system according to any one of claims 1 to 6, characterized in that: The electric explosion pressure reducing proportional valve group (7) comprises an electric explosion valve (71), a pressure reducing valve (72), and a proportional valve (73); the electric explosion valve (71) is arranged corresponding to the exhaust nozzle of the oxygen cylinder (5); the gas outlet end of the electric explosion valve (71) is connected to the pressure reducing valve (72); and the gas outlet end of the pressure reducing valve (72) is connected to the proportional valve (73).

9. A passenger sequential oxygen supply system according to any one of claims 1 to 6, characterized in that: The electromagnetic lock door panel assembly (2) comprises a lock tongue (21), an electromagnetic assembly (22), a manual assembly (23), a door panel (24), and a housing; the lock tongue (21) is movably arranged inside the housing; an openable door panel (24) is arranged at the bottom of the oxygen mask (8); the lock tongue (21) is used to lock the door panel (24); an electromagnetic assembly (22) and a manual assembly (23) are arranged on one side of the lock tongue (21); the electromagnetic assembly (22) and the manual assembly (23) are both capable of driving the lock tongue (21) to unlock the door panel (24); and the electromagnetic assembly (22) is connected to a power adapter board (6).

10. A passenger sequential oxygen supply method, implemented based on the passenger sequential oxygen supply system according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: After the power adapter board (6) receives power from the onboard power supply (1), it outputs a control voltage to the electromagnetic lock door panel assembly (2), and the electromagnetic lock door panel assembly (2) is opened to place the oxygen mask (8); Step 2: The passenger pulls the pull-wire switch (4), and the power adapter board (6) is connected to the sequential oxygen supply control circuit board (3) and the electric explosion pressure reduction proportional valve group (7), and outputs a control voltage to the sequential oxygen supply control circuit board (3) and the electric explosion pressure reduction proportional valve group (7); the electric explosion pressure reduction proportional valve group (7) is opened to connect the oxygen cylinder (5) and the oxygen mask (8); Step 3, adjusting the flow rate of oxygen output by the electric explosion pressure reducing proportional valve group (7) in real time according to the oxygen supply time through the timing oxygen supply control circuit board (3); in the time period of 0-150s, adjusting the opening of the electric explosion pressure reducing proportional valve group (7) to the maximum, outputting oxygen at a flow rate of not less than 3.12L / min; in the time period of 150-420s, controlling the opening of the electric explosion pressure reducing proportional valve group (7) to decrease, outputting oxygen at a flow rate of not less than 2.19L / min; after 420s, controlling the opening of the electric explosion pressure reducing proportional valve group (7) to the minimum, outputting oxygen at a flow rate of not less than 1.71L / min until the oxygen is exhausted.

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