Aircraft passenger compartment oxygen supply equipment

Abstract

The utility model relates to the technical field of aviation oxygen supply, in particular to oxygen supply equipment for a passenger compartment of an airplane. Comprising a power adapter board, an oxygen supply control board, a plunger latch, an electric explosion valve, a proportional valve and a pull switch. An electric explosion valve is arranged to explode an airborne oxygen bottle to obtain oxygen according to a power signal obtained from a power adapter board; a proportional valve is arranged to adjust the oxygen flow obtained from an electric explosion valve according to a driving signal obtained from an oxygen supply control panel; a 28VDC power supply signal on the machine is converted into a working power supply signal of the oxygen supply control panel, the plunger latch and the electric explosion valve by arranging the power supply adapter board; an electric explosion bottle opening mode and time sequence oxygen supply are adopted, leakage is avoided, and on the premise that safety and reliability are guaranteed, the device has the advantages of being low in maintenance cost and high in oxygen utilization rate.

Description

Technical Field

[0001] This utility model relates to the field of aviation oxygen supply technology, specifically to an oxygen supply device for an aircraft passenger cabin. Background Technology

[0002] Whether for civilian or military use, the issue of oxygen supply in aviation has received increasing attention. Civilian passenger aircraft typically employ a closed pressurized cabin design, maintaining cabin pressure within a range acceptable to the human body, requiring no special oxygen supply. Oxygen masks are only deployed for passenger use when the cabin depressurizes.

[0003] In the existing technology, oxygen masks can only provide emergency oxygen supply and cannot provide oxygen for a long time. Furthermore, existing oxygen supply devices cannot control the proportional valve when providing oxygen continuously, resulting in low oxygen utilization. Utility Model Content

[0004] This invention addresses the problem of low oxygen utilization caused by the inability to adjust the timing of proportional valves in existing passenger cabin oxygen supply equipment. It proposes an aircraft passenger cabin oxygen supply device, comprising a power adapter board, an oxygen supply control board, a latch, an electric detonation valve, a proportional valve, and a pull-wire switch. Oxygen is obtained by detonating an onboard oxygen cylinder using an electric detonation valve based on a power signal received from the power adapter board. The proportional valve adjusts the oxygen flow rate from the electric detonation valve based on a drive signal received from the oxygen supply control board. The power adapter board converts the onboard 28VDC power signal into operating power signals for the oxygen supply control board, latch, and electric detonation valve. Employing an electric detonation method and timing-based oxygen supply avoids leakage and, while ensuring safety and reliability, offers advantages such as low maintenance costs and high oxygen utilization.

[0005] The specific implementation details of this utility model are as follows:

[0006] An oxygen supply device for an aircraft passenger cabin, connected to an onboard oxygen cylinder and mask; including a power adapter board, an oxygen supply control board, a latch, an electric explosion valve, a proportional valve, and a pull-wire switch;

[0007] One end of the pull-cord switch is connected to the face mask, and the other end is connected to the power adapter board;

[0008] One end of the electric explosion valve is connected to the onboard oxygen cylinder, and the other end is connected to the power adapter board;

[0009] One end of the proportional valve is connected to the electric explosion valve, and the other end is connected to the oxygen supply control board;

[0010] The latch is connected to the power adapter board;

[0011] The electric explosion valve is used to detonate the onboard oxygen cylinder to obtain oxygen based on the power signal obtained from the power adapter board.

[0012] The proportional valve is used to adjust the oxygen flow rate obtained from the electric explosion valve according to the drive signal obtained from the oxygen supply control board.

[0013] The power adapter board is used to convert the machine's 28VDC power signal into a working power signal and output it to the oxygen supply control board, latch, and electric explosion valve.

[0014] The oxygen supply control board is used to convert the working power signal obtained from the power adapter board into a voltage signal, and convert the voltage signal into a drive signal according to the generated timing signal to drive the proportional valve to supply oxygen in sequence.

[0015] To better realize this utility model, the oxygen supply control board further includes a clock source circuit, a timing conditioning circuit, a proportional valve control voltage conditioning circuit, and a proportional valve drive circuit connected in sequence on the oxygen supply control board.

[0016] The clock source circuit is used to generate clock signals;

[0017] The timing conditioning circuit is used to generate timing pulse signals based on the clock signal obtained from the clock source circuit;

[0018] A proportional valve controls a voltage conditioning circuit to generate a voltage signal based on a timing pulse signal obtained from a timing conditioning circuit.

[0019] The proportional valve drive circuit is used to generate a drive signal based on the voltage signal obtained from the proportional valve control circuit and output it to the proportional valve.

[0020] To better realize this utility model, the clock source circuit further includes a crystal oscillator unit and a frequency multiplier unit;

[0021] The input terminal of the frequency multiplier unit is connected to the output terminal of the power adapter board and the output terminal of the crystal oscillator unit, and the output terminal of the frequency multiplier unit is connected to the input terminal of the timing conditioning circuit.

[0022] The crystal oscillator unit is used to generate clock signals;

[0023] The frequency multiplication unit is used to generate multiple frequency-multiplied clock signals according to the set frequency multiplication coefficient.

[0024] To better realize this utility model, the timing conditioning circuit further includes a first AND gate unit and a second AND gate unit;

[0025] The input terminal of the first AND gate unit is connected to the output terminal of the frequency multiplier unit, and the output terminal of the first AND gate unit outputs a first timing pulse signal to the input terminal of the proportional valve control voltage conditioning circuit.

[0026] The input terminal of the second AND gate unit is connected to the output terminal of the frequency multiplier unit, and the output terminal of the second AND gate unit outputs a second timing pulse signal to the input terminal of the proportional valve control voltage conditioning circuit.

[0027] To better realize this utility model, the proportional valve control voltage conditioning circuit further includes a first D flip-flop, a second D flip-flop, and an adder circuit;

[0028] The first timing pulse signal is input to the input terminal of the first D flip-flop, and the output terminal of the first D flip-flop is connected to the input terminal of the adder circuit;

[0029] The second timing pulse signal is input to the input terminal of the second D flip-flop, and the output terminal of the second D flip-flop is connected to the input terminal of the adder circuit;

[0030] The output terminal of the adder circuit outputs a voltage signal to the proportional valve drive circuit.

[0031] To better realize this utility model, the proportional valve drive circuit further includes an amplifier U11B, a transistor Q1, a Schottky diode D4, a resistor R22, and a capacitor C10;

[0032] The positive input terminal of amplifier U7B is connected to the output terminal of the adder circuit, the negative input terminal of amplifier U11B is connected to ground through resistor R22 and capacitor C10 connected in sequence, and the output terminal of amplifier U11B is connected to the base of transistor Q1.

[0033] The collector of transistor Q1 is connected to the power adapter board, and the emitter of transistor Q1 is connected to the proportional valve.

[0034] The first end of the Schottky diode D4 is connected between the base of the transistor Q1 and the output of the amplifier U11B. The second end of the Schottky diode D4 is connected between the emitter of the transistor Q1 and the proportional valve. The third end of the Schottky diode D4 is connected between the positive input of the amplifier U7B and the proportional valve, and is also connected to ground.

[0035] To better realize this utility model, the power adapter board further 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 integrated on the power adapter board.

[0036] The first power adapter unit inputs 28VDC to the machine at its input terminal and outputs 15VDC to the oxygen supply control board at its output terminal.

[0037] The second power adapter unit inputs 28VDC from the machine at its input terminal and outputs 2.5VDC to the oxygen supply control board at its output terminal.

[0038] The third power adapter unit inputs 28VDC from the machine at its input terminal and connects to the latch at its output terminal.

[0039] The fourth power adapter unit has a 28VDC input terminal and an output terminal connected to the detonation valve.

[0040] To better realize this utility model, the first power adapter unit further includes capacitor C1, capacitor C2, inductor L1, and chip U1;

[0041] The input terminal of the chip U1 is connected to the machine's 28VDC power supply through the inductor L1, and the output terminal of the chip U1 outputs 15VDC to the input terminal of the oxygen supply control board.

[0042] One end of the capacitor C1 is connected between the inductor L1 and the on-board 28VDC power supply, and the other end of the capacitor C1 is connected between the ground terminal of the chip U1 and the ground terminal of the on-board 28VDC power supply.

[0043] One end of capacitor C2 is connected between inductor L1 and input terminal of chip U1, and the other end of capacitor C1 is connected between ground terminal of chip U1 and capacitor C1.

[0044] The second power adapter unit includes chip U2, capacitor C5, capacitor C6, and inductor L2;

[0045] The input terminal of the chip U2 is connected to the machine's 28VDC power supply through inductor L2, and the output terminal of the chip U2 outputs 2.5VDC to the input terminal of the oxygen supply control board.

[0046] One end of the capacitor C5 is connected between the inductor L2 and the on-board 28VDC power supply, and the other end of the capacitor C5 is connected between the ground terminal of the chip U2 and the ground terminal of the on-board 28VDC power supply.

[0047] One end of capacitor C6 is connected between inductor L2 and the input terminal of chip U2, and the other end of capacitor C5 is connected between the ground terminal of chip U1 and capacitor C5.

[0048] To better realize this utility model, the third power supply adapter unit further includes a first delay unit and a relay K1;

[0049] The input terminal of the relay K1 is connected to the 28VDC power supply on the machine, and the output terminal of the relay K1 is connected to the latch.

[0050] One end of the first delay unit is connected between the input terminal of relay K1 and the 28VDC power supply on the machine, and the other end of the first delay unit is connected between the output terminal of relay K1 and the latch.

[0051] To better realize this utility model, the fourth power supply adapter unit further includes a second delay unit, relay K2, and relay K3;

[0052] The input terminal of relay K2 is connected to the pull-cord switch, and the output terminal of relay K2 is connected to relay K3;

[0053] One end of the second delay unit is connected between the output terminal of relay K2 and the input terminal of relay K3, and the other end of the second delay unit is connected between the output terminal of relay K3 and the electric explosion valve.

[0054] This utility model has the following beneficial effects:

[0055] This invention, by setting up an electric explosion valve and an oxygen supply control board, adopts an electric explosion bottle opening method for sequential oxygen supply, avoiding leakage. Under the premise of ensuring its safety and reliability, it has the advantages of low maintenance cost and high oxygen utilization rate. Attached Figure Description

[0056] Figure 1 A schematic diagram of the overall structure of the oxygen supply equipment for the aircraft passenger cabin provided by this utility model.

[0057] Figure 2 A schematic diagram of the circuit principle of the power adapter board provided by this utility model.

[0058] Figure 3 A schematic diagram of the clock source circuit provided by this utility model.

[0059] Figure 4 A schematic diagram of the timing conditioning circuit provided by this utility model.

[0060] Figure 5 A schematic diagram of the proportional valve control circuit provided by this utility model.

[0061] Figure 6 A schematic diagram of the proportional valve drive circuit provided by this utility model. Detailed Implementation

[0062] To more clearly illustrate the technical solutions of the embodiments of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the described embodiments are only some embodiments of this utility model, not all embodiments, and therefore should not be regarded as a limitation on the scope of protection. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0063] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0064] Example 1:

[0065] This embodiment proposes an oxygen supply device for an aircraft passenger cabin, such as... Figure 1 As shown, it connects to the airborne oxygen cylinder and mask; it includes a power adapter board, an oxygen supply control board, a latch, an electric explosion valve, a proportional valve, and a pull-cord switch;

[0066] One end of the pull-cord switch is connected to the face mask, and the other end is connected to the power adapter board;

[0067] One end of the electric explosion valve is connected to the onboard oxygen cylinder, and the other end is connected to the power adapter board;

[0068] One end of the proportional valve is connected to the electric explosion valve, and the other end is connected to the oxygen supply control board;

[0069] The latch is connected to the power adapter board;

[0070] The electric explosion valve is used to detonate the onboard oxygen cylinder to obtain oxygen based on the power signal obtained from the power adapter board.

[0071] The proportional valve is used to adjust the oxygen flow rate obtained from the electric explosion valve according to the drive signal obtained from the oxygen supply control board.

[0072] The power adapter board is used to convert the machine's 28VDC power signal into a working power signal and output it to the oxygen supply control board, latch, and electric explosion valve.

[0073] The oxygen supply control board is used to convert the working power signal obtained from the power adapter board into a voltage signal, and convert the voltage signal into a drive signal according to the generated timing signal to drive the proportional valve to supply oxygen in sequence.

[0074] Working principle: This embodiment uses an electric explosion valve and an oxygen supply control board to supply oxygen sequentially by electric explosion opening the bottle, avoiding leakage. Under the premise of ensuring safety and reliability, it has the advantages of low maintenance cost and high oxygen utilization rate.

[0075] Example 2:

[0076] This embodiment is based on the above embodiment 1, such as... Figure 2 The specific structure of the power adapter board is described as shown below.

[0077] 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 integrated on the power adapter board.

[0078] The first power adapter unit inputs 28VDC to the machine at its input terminal and outputs 15VDC to the oxygen supply control board at its output terminal.

[0079] The second power adapter unit inputs 28VDC from the machine at its input terminal and outputs 2.5VDC to the oxygen supply control board at its output terminal.

[0080] The third power adapter unit inputs 28VDC from the machine at its input terminal and connects to the latch at its output terminal.

[0081] The fourth power adapter unit has a 28VDC input terminal and an output terminal connected to the detonation valve.

[0082] The first power adapter unit includes capacitor C1, capacitor C2, inductor L1, and chip U1;

[0083] The input terminal of the chip U1 is connected to the machine's 28VDC power supply through the inductor L1, and the output terminal of the chip U1 outputs 15VDC to the input terminal of the oxygen supply control board.

[0084] One end of the capacitor C1 is connected between the inductor L1 and the on-board 28VDC power supply, and the other end of the capacitor C1 is connected between the ground terminal of the chip U1 and the ground terminal of the on-board 28VDC power supply.

[0085] One end of capacitor C2 is connected between inductor L1 and input terminal of chip U1, and the other end of capacitor C1 is connected between ground terminal of chip U1 and capacitor C1.

[0086] The second power adapter unit includes chip U2, capacitor C5, capacitor C6, and inductor L2;

[0087] The input terminal of the chip U2 is connected to the machine's 28VDC power supply through inductor L2, and the output terminal of the chip U2 outputs 2.5VDC to the input terminal of the oxygen supply control board.

[0088] One end of the capacitor C5 is connected between the inductor L2 and the on-board 28VDC power supply, and the other end of the capacitor C5 is connected between the ground terminal of the chip U2 and the ground terminal of the on-board 28VDC power supply.

[0089] One end of capacitor C6 is connected between inductor L2 and the input terminal of chip U2, and the other end of capacitor C5 is connected between the ground terminal of chip U1 and capacitor C5.

[0090] The third power supply adapter unit includes a first delay unit and a relay K1;

[0091] The input terminal of the relay K1 is connected to the 28VDC power supply on the machine, and the output terminal of the relay K1 is connected to the latch.

[0092] One end of the first delay unit is connected between the input terminal of relay K1 and the 28VDC power supply on the machine, and the other end of the first delay unit is connected between the output terminal of relay K1 and the latch.

[0093] The fourth power supply adapter unit includes a second delay unit, relay K2, and relay K3;

[0094] The input terminal of relay K2 is connected to the pull-cord switch, and the output terminal of relay K2 is connected to relay K3;

[0095] One end of the second delay unit is connected between the output terminal of relay K2 and the input terminal of relay K3, and the other end of the second delay unit is connected between the output terminal of relay K3 and the electric explosion valve.

[0096] Working principle: The power adapter is used to convert the 28VDC power supply on board to provide and control the working power signals required by the latches, electric explosion valves and oxygen supply control boards in the passenger oxygen equipment.

[0097] Latch control function: After the system is powered on, the 28VDC power signal on the machine is sent to the latch for release through relay K1. At the same time, the delay circuit composed of resistor R1, capacitor C3, and U3 ensures that U3 is connected within 5 seconds after the 28VDC power signal on the machine is powered on, so that relay K1 is closed and the power supply to the latch is disconnected.

[0098] In this embodiment, U3 and U4 in the delay circuit are LBSS123LT1G field-effect transistors.

[0099] Electric Explosion Valve Control 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 detonate via U2. At this time, because the pull-cord switch remains open, relay K2 is not closed, and the 2.5VDC voltage is not temporarily supplied to the electric explosion valve. When the pull-cord switch is closed, relay K2 closes, and the 2.5VDC voltage is supplied to the electric explosion valve through the normally closed terminal of relay K3, causing the electric explosion valve to detonate. After relay K2 closes, the delay circuit composed of R2, C4, and U4 ensures that relay K3 closes within 5.5 seconds after relay K2 closes, disconnecting the 2.5VDC voltage supplied to the electric explosion valve.

[0100] In this embodiment, U2 is an R-78B2.5-2.0 non-isolated DC / DC converter.

[0101] Oxygen Supply Control Board Functions: After the system is powered on, the 28VDC on the machine is converted to 15VDC through U1, and then to 2.5VDC through U2. All three voltages (15VDC, 2.5VDC, and 2.5VDC) are output to the power input terminal of the oxygen supply control board, enabling its normal operation. When the pull-cord switch is closed, relay K2 closes, disconnecting the 15VDC input to the oxygen supply control board's power input terminal, resetting the timing circuit on the oxygen supply control board. After relay K2 closes, the delay circuit composed of R2, C4, and U4 ensures that relay K3 closes within a 5.5-second delay after relay K2 closes, restoring the 15VDC to the oxygen supply control board's power input terminal, enabling the oxygen supply control board's power input terminal to operate normally.

[0102] In this embodiment, U1 is a TSR05-24150 DC / DC converter.

[0103] The other parts of this embodiment are the same as those in Embodiment 1 above, so they will not be described again.

[0104] Example 3:

[0105] This embodiment is based on any one of Embodiments 1-2 above, such as Figure 3 The specific structure of the clock source circuit is explained as shown.

[0106] The clock source circuit includes a crystal oscillator unit and a frequency multiplier unit;

[0107] The input terminal of the frequency multiplier unit is connected to the output terminal of the power adapter board and the output terminal of the crystal oscillator unit, and the output terminal of the frequency multiplier unit is connected to the input terminal of the timing conditioning circuit.

[0108] The crystal oscillator unit is used to generate clock signals;

[0109] The frequency multiplication unit is used to generate multiple frequency-multiplied clock signals according to the set frequency multiplication coefficient.

[0110] Working principle: Clock source circuit, principle as follows Figure 3 As shown, after the oxygen supply control board is powered on, it uses integrated IC chips U5-U6 to multiply the 32.768kHz signal provided by the crystal oscillator and output the required clock signals. In this embodiment, IC chip U5 is a CD4060BM counter chip, and IC chip U6 is a CD4020BNSR counter chip.

[0111] like Figure 3 As shown, the crystal oscillator unit includes crystal oscillator Y1, capacitor C7, capacitor C8, resistor R3, and resistor R4; the frequency multiplication unit includes IC chip U5, IC chip U6, capacitor C9, and resistor R5.

[0112] The other parts of this embodiment are the same as any one of the above embodiments 1-2, so they will not be described again.

[0113] Example 4:

[0114] This embodiment is based on any one of embodiments 1-3 above, such as Figure 4 As shown, a specific embodiment of the timing conditioning circuit is described in detail.

[0115] The timing conditioning circuit includes a first AND gate unit and a second AND gate unit;

[0116] The input terminal of the first AND gate unit is connected to the output terminal of the frequency multiplier unit, and the output terminal of the first AND gate unit outputs a first timing pulse signal to the input terminal of the proportional valve control voltage conditioning circuit.

[0117] The input terminal of the second AND gate unit is connected to the output terminal of the frequency multiplier unit, and the output terminal of the second AND gate unit outputs a second timing pulse signal to the input terminal of the proportional valve control voltage conditioning circuit.

[0118] Working principle: such as Figure 4 As shown, the clock signal generated by the clock source circuit is input to the timing conditioning circuit. The timing conditioning circuit converts the clock signal into a timing signal 150 seconds (2.5 minutes) later, or 420 seconds (7 minutes) later, required for 58 minutes of oxygen supply conditioning.

[0119] The timing conditioning circuit provided in this embodiment includes AND gates U7A, U7B, U7C, U8A, U8B, and U8C, all of which use 74HC08 chips.

[0120] The other parts of this embodiment are the same as any one of the embodiments 1-3 above, so they will not be described again.

[0121] Example 5:

[0122] This embodiment is based on any one of embodiments 1-4 above, such as Figure 5 As shown, the specific structure of the proportional valve control circuit is illustrated using a specific embodiment.

[0123] The proportional valve control voltage conditioning circuit includes a first D flip-flop, a second D flip-flop, and an adder circuit;

[0124] The first timing pulse signal is input to the input terminal of the first D flip-flop, and the output terminal of the first D flip-flop is connected to the input terminal of the adder circuit;

[0125] The second timing pulse signal is input to the input terminal of the second D flip-flop, and the output terminal of the second D flip-flop is connected to the input terminal of the adder circuit;

[0126] The output terminal of the adder circuit outputs a voltage signal to the proportional valve drive circuit.

[0127] Working principle: The functional principle of the proportional valve control circuit is as follows: Figure 5 As shown, the timing pulse signal controls the input voltage of the adder circuit composed of an operational amplifier through a D flip-flop, thereby controlling the magnitude of the voltage output to the proportional valve drive circuit.

[0128] 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 at its maximum value, supplying oxygen to the passenger at an oxygen supply rate of not less than 3.12L / min.

[0129] After 150 seconds, or two and a half minutes, the output of U9A is turned off, the output voltage of the U10B branch becomes 0, the driving voltage amplitude of the proportional valve decreases, and oxygen is supplied to the passengers at an oxygen supply rate of not less than 2.19L / min.

[0130] After 420 seconds, or seven minutes, the output of U9B is turned off, the output voltage of the U10C branch becomes 0, the driving voltage amplitude of the proportional valve decreases, and oxygen is supplied to the passengers at an oxygen supply rate of not less than 1.71L / min until all the oxygen in the oxygen cylinder is depleted.

[0131] The other parts of this embodiment are the same as any one of the embodiments 1-4 above, so they will not be described again.

[0132] Example 6:

[0133] This embodiment is based on any one of the embodiments 1-5 above, such as Figure 6 As shown, the structure of the proportional valve drive circuit is described in detail with reference to a specific embodiment.

[0134] The proportional valve drive circuit includes amplifier U7B, transistor Q1, Schottky diode, resistor R22, and capacitor C10;

[0135] The positive input terminal of the amplifier U7B is connected to the output terminal of the adder circuit, the negative input terminal of the amplifier U7B is connected to the ground terminal through the resistor R22 and the capacitor C10 connected in sequence, and the output terminal of the amplifier U7B is connected to the base of the transistor Q1.

[0136] The collector of transistor Q1 is connected to the power adapter board, and the emitter of transistor Q1 is connected to the proportional valve.

[0137] The first end of the Schottky diode is connected between the base of the transistor Q1 and the output of the amplifier U7B. The second end of the Schottky diode is connected between the emitter of the transistor Q1 and the proportional valve. The third end of the Schottky diode is connected between the positive input of the amplifier U7B and the proportional valve, and is connected to ground.

[0138] Working principle: The proportional valve drive circuit provided in this embodiment is as follows: Figure 6 As shown, the proportional valve drive circuit converts the voltage signal from the proportional valve control voltage conditioning and distribution circuit into a drive signal to control the operation of the proportional valve.

[0139] The other parts of this embodiment are the same as any one of the above embodiments 1-5, so they will not be described again.

[0140] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. An oxygen supply device for an aircraft passenger cabin, connected to an onboard oxygen cylinder and a mask; characterized in that, Includes power adapter board, oxygen supply control board, latch, electric explosion valve, proportional valve, and pull-cord switch; One end of the pull-cord switch is connected to the face mask, and the other end is connected to the power adapter board; One end of the electric explosion valve is connected to the onboard oxygen cylinder, and the other end is connected to the power adapter board; One end of the proportional valve is connected to the electric explosion valve, and the other end is connected to the oxygen supply control board; The latch is connected to the power adapter board; The electric explosion valve is used to detonate the onboard oxygen cylinder to obtain oxygen based on the power signal obtained from the power adapter board. The proportional valve is used to adjust the oxygen flow rate obtained from the electric explosion valve according to the drive signal obtained from the oxygen supply control board. The power adapter board is used to convert the machine's 28VDC power signal into a working power signal and output it to the oxygen supply control board, latch, and electric explosion valve. The oxygen supply control board is used to convert the working power signal obtained from the power adapter board into a voltage signal, and convert the voltage signal into a drive signal according to the generated timing signal to drive the proportional valve to supply oxygen in sequence.

2. The oxygen supply equipment for an aircraft passenger cabin according to claim 1, characterized in that, The oxygen supply control board includes a clock source circuit, a timing conditioning circuit, a proportional valve control voltage conditioning circuit, and a proportional valve drive circuit, which are connected in sequence on the oxygen supply control board. The clock source circuit is used to generate clock signals; The timing conditioning circuit is used to generate timing pulse signals based on the clock signal obtained from the clock source circuit; A proportional valve controls a voltage conditioning circuit to generate a voltage signal based on a timing pulse signal obtained from a timing conditioning circuit. The proportional valve drive circuit is used to generate a drive signal based on the voltage signal obtained from the proportional valve control circuit and output it to the proportional valve.

3. An oxygen supply device for an aircraft passenger cabin according to claim 2, characterized in that, The clock source circuit includes a crystal oscillator unit and a frequency multiplier unit; The input terminal of the frequency multiplier unit is connected to the output terminal of the power adapter board and the output terminal of the crystal oscillator unit, and the output terminal of the frequency multiplier unit is connected to the input terminal of the timing conditioning circuit. The crystal oscillator unit is used to generate clock signals; The frequency multiplication unit is used to generate multiple frequency-multiplied clock signals according to the set frequency multiplication coefficient.

4. An oxygen supply device for an aircraft passenger cabin according to claim 3, characterized in that, The timing conditioning circuit includes a first AND gate unit and a second AND gate unit; The input terminal of the first AND gate unit is connected to the output terminal of the frequency multiplier unit, and the output terminal of the first AND gate unit outputs a first timing pulse signal to the input terminal of the proportional valve control voltage conditioning circuit. The input terminal of the second AND gate unit is connected to the output terminal of the frequency multiplier unit, and the output terminal of the second AND gate unit outputs a second timing pulse signal to the input terminal of the proportional valve control voltage conditioning circuit.

5. An oxygen supply device for an aircraft passenger cabin according to claim 4, characterized in that, The proportional valve control voltage conditioning circuit includes a first D flip-flop, a second D flip-flop, and an adder circuit; The first timing pulse signal is input to the input terminal of the first D flip-flop, and the output terminal of the first D flip-flop is connected to the input terminal of the adder circuit; The second timing pulse signal is input to the input terminal of the second D flip-flop, and the output terminal of the second D flip-flop is connected to the input terminal of the adder circuit; The output terminal of the adder circuit outputs a voltage signal to the proportional valve drive circuit.

6. An oxygen supply device for an aircraft passenger cabin according to claim 5, characterized in that, The proportional valve drive circuit includes amplifier U11B, transistor Q1, Schottky diode D4, resistor R22, and 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 transistor Q1 is connected to the power adapter board, and the emitter of transistor Q1 is connected to the proportional valve. The first end of the Schottky diode D4 is connected between the base of the transistor Q1 and the output of the amplifier U11B. The second end of the Schottky diode D4 is connected between the emitter of the transistor Q1 and the proportional valve. The third end of the Schottky diode is connected between the positive input of the amplifier U11B and the proportional valve, and is connected to ground.

7. An oxygen supply device for an aircraft passenger cabin according to claim 1, characterized in that, 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 integrated on the power adapter board. The first power adapter unit inputs 28VDC to the machine at its input terminal and outputs 15VDC to the oxygen supply control board at its output terminal. The second power adapter unit inputs 28VDC from the machine at its input terminal and outputs 2.5VDC to the oxygen supply control board at its output terminal. The third power adapter unit inputs 28VDC from the machine at its input terminal and connects to the latch at its output terminal. The fourth power adapter unit has a 28VDC input terminal and an output terminal connected to the detonation valve.

8. An oxygen supply device for an aircraft passenger cabin according to claim 7, characterized in that, The first power adapter unit includes capacitor C1, capacitor C2, inductor L1, and chip U1; The input terminal of the chip U1 is connected to the machine's 28VDC power supply through the inductor L1, and the output terminal of the chip U1 outputs 15VDC to the input terminal of the oxygen supply control board. One end of the capacitor C1 is connected between the inductor L1 and the on-board 28VDC power supply, and the other end of the capacitor C1 is connected between the ground terminal of the chip U1 and the ground terminal of the on-board 28VDC power supply. One end of capacitor C2 is connected between inductor L1 and input terminal of chip U1, and the other end of capacitor C1 is connected between ground terminal of chip U1 and capacitor C1. The second power adapter unit includes chip U2, capacitor C5, capacitor C6, and inductor L2; The input terminal of the chip U2 is connected to the machine's 28VDC power supply through inductor L2, and the output terminal of the chip U2 outputs 2.5VDC to the input terminal of the oxygen supply control board. One end of the capacitor C5 is connected between the inductor L2 and the on-board 28VDC power supply, and the other end of the capacitor C5 is connected between the ground terminal of the chip U2 and the ground terminal of the on-board 28VDC power supply. One end of capacitor C6 is connected between inductor L2 and the input terminal of chip U2, and the other end of capacitor C5 is connected between the ground terminal of chip U1 and capacitor C5.

9. An oxygen supply device for an aircraft passenger cabin according to claim 7, characterized in that, The third power supply adapter unit includes a first delay unit and a relay K1; The input terminal of the relay K1 is connected to the 28VDC power supply on the machine, and the output terminal of the relay K1 is connected to the latch. One end of the first delay unit is connected between the input terminal of relay K1 and the 28VDC power supply on the machine, and the other end of the first delay unit is connected between the output terminal of relay K1 and the latch.

10. An oxygen supply device for an aircraft passenger cabin according to claim 7, characterized in that, The fourth power supply adapter unit includes a second delay unit, relay K2, and relay K3; The input terminal of relay K2 is connected to the pull-cord switch, and the output terminal of relay K2 is connected to relay K3; One end of the second delay unit is connected between the output terminal of relay K2 and the input terminal of relay K3, and the other end of the second delay unit is connected between the output terminal of relay K3 and the electric explosion valve.

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