Time sequence control circuit of oxygen supply equipment

Abstract

The utility model discloses a time sequence control circuit for oxygen supply equipment, which comprises an onboard power supply, a time sequence oxygen supply control circuit, a pull switch, an electric explosion valve controller, a second relay and a fourth relay, the onboard power supply comprises a 28VDC end and a GND end, the 28VDC end is respectively connected with the positive end of the second relay and the positive end of the fourth relay, and the GND end is respectively connected with the positive end of the second relay and the positive end of the fourth relay. The GND end is connected to the negative end of the second relay through the pull switch; a time sequence oxygen supply control circuit and a second relay are arranged between the positive end and the negative end of the fourth relay, the GND end of the onboard power supply is connected with the negative end of the electric explosion valve controller, and the positive end of the electric explosion valve controller is connected with the 28VDC end of the onboard power supply through the second relay; according to the utility model, 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 time periods according to time sequences, so that oxygen is output at different flow rates at different time periods.

Description

Technical Field

[0001] This utility model belongs to the technical field of oxygen supply equipment, and relates to a timing control circuit for oxygen supply equipment. Background Technology

[0002] Oxygen supply equipment is used in aircraft, diving cabins, and other similar facilities to provide oxygen to passengers in emergencies, ensuring their safety. It typically operates through a time-sequential oxygen supply control circuit. Existing circuits send a control signal to the electro-explosive valve at the oxygen cylinder, triggering it to open the cylinder and supply oxygen to passengers. However, these circuits cannot flexibly adjust the oxygen flow rate based on different time periods. In practice, oxygen demand is highest at the initial stage of an emergency, gradually decreasing over time. Current control circuits only maintain a constant flow rate, failing to adapt to varying oxygen needs at different times.

[0003] Therefore, in view of the above-mentioned problems existing in the control circuit of the existing oxygen supply equipment, this utility model discloses a timing control circuit for oxygen supply equipment. Utility Model Content

[0004] The purpose of this invention is to provide a timing control circuit for an oxygen supply device, which can control the proportional valve at the oxygen cylinder in the oxygen supply device to open at different proportional degrees at different times, so as to output oxygen at different flow rates at different time periods.

[0005] This utility model is achieved through the following technical solution:

[0006] A timing control circuit for an oxygen supply device includes an on-board power supply, a timing oxygen supply control circuit, a pull-cord switch, and an electric explosion valve controller. It also includes a second relay and a fourth relay. The on-board power supply includes a 28VDC terminal and a GND terminal. The 28VDC terminal is connected to the positive terminals of the second and fourth relays, respectively. The GND terminal is connected to the negative terminal of the second relay via the pull-cord switch. A timing oxygen supply control circuit and the second relay are connected between the positive and negative terminals of the fourth relay. The GND terminal of the on-board power supply is connected to the negative terminal of the electric explosion valve controller, and the positive terminal of the electric explosion valve controller is connected to the 28VDC terminal of the on-board power supply via the second relay.

[0007] To better realize this utility model, it further includes a third relay, wherein a pull-wire switch is provided between the positive and negative terminals of the third relay, and the third relay is provided between the positive and negative terminals of the second relay.

[0008] To better realize this utility model, it further includes a bolt controller and a discrete signal control switch assembly. The negative terminal of the bolt controller is connected to the GND terminal of the onboard power supply, and the positive terminal of the bolt controller is connected to the 28VDC terminal of the onboard power supply through the discrete signal control switch assembly.

[0009] To better realize this utility model, the discrete signal control switch assembly further includes a bolt discrete signal generation circuit and a first relay. The bolt discrete signal generation circuit is connected to the first relay, and the positive terminal of the bolt controller is connected to the 28VDC terminal of the machine power supply through the first relay.

[0010] To better realize this utility model, a test switch is further included, which is disposed between the negative terminal of the fourth relay and the GND terminal of the machine power supply.

[0011] To better realize this utility model, the timing oxygen supply control circuit further includes a clock source circuit, a timing conditioning circuit, a proportional valve control voltage conditioning circuit, and a proportional valve drive circuit. The input terminal of the clock source circuit is connected to the machine power supply through a fourth relay. The output terminal of the clock source circuit is connected to the timing conditioning circuit. The output terminal of the timing conditioning circuit is connected to the proportional valve control voltage conditioning circuit. The output terminal of the proportional valve control voltage conditioning circuit is connected to the proportional valve drive circuit.

[0012] To better realize this utility model, the clock source circuit further includes a first integrated IC chip and a second integrated IC chip. The first integrated IC chip inputs a first clock signal to the timing conditioning circuit, and the second integrated IC chip inputs a second clock signal to the timing conditioning circuit.

[0013] To better realize this utility model, the timing conditioning circuit further includes a first conditioning chip and a second conditioning chip. The first conditioning chip is connected to a first integrated IC chip, and the second conditioning chip is connected to a second integrated IC chip. The first conditioning chip inputs a first conditioning signal to the proportional valve control voltage conditioning circuit, and the second conditioning chip inputs a second conditioning signal to the proportional valve control voltage conditioning circuit.

[0014] To better realize this utility model, the proportional valve control voltage conditioning circuit further includes several parallel D flip-flops, and the output of the D flip-flops is connected to the proportional valve drive circuit through an operational amplifier adder circuit.

[0015] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0016] This invention enables the second, third, and fourth relays to be activated after the pull-wire switch is triggered, thereby connecting the electric explosion valve controller to the machine's power supply and the timing oxygen supply control circuit to the machine's power supply. The electric explosion valve controller triggers the electric explosion valve at the oxygen cylinder, thus connecting the oxygen cylinder to supply oxygen. Simultaneously, the timing oxygen supply control circuit outputs different timing control signals to the proportional valve at the oxygen cylinder opening based on different times, thereby controlling the proportional valve to open at different degrees at different times, ultimately enabling the oxygen supply equipment to supply oxygen at different flow rates at different times. Attached Figure Description

[0017] Figure 1 A schematic diagram of the timing control circuit for an oxygen supply device;

[0018] Figure 2 This is a schematic diagram of the first clock signal circuit of the clock source circuit;

[0019] Figure 3 This is a schematic diagram of the second clock signal circuit of the clock source circuit;

[0020] Figure 4 This is a circuit diagram of the first conditioning chip;

[0021] Figure 5 This is a circuit diagram of the second conditioning chip;

[0022] Figure 6 This is a schematic diagram of a proportional valve-controlled voltage conditioning circuit.

[0023] Figure 7 This is a schematic diagram of a proportional valve drive circuit.

[0024] The components are: 1-On-board power supply; 2-Lock controller; 3-Sequential oxygen supply control circuit; 4-Pull-wire switch; 5-Electric explosion valve controller; 6-Lock discrete signal generation circuit; 7-Test switch; 8-Proportional valve; 331-D trigger; K1-First relay; K2-Second relay; K3-Third relay; K4-Fourth relay; U1-First integrated IC chip; U2-Second integrated IC chip; U3-First conditioning chip; U4-Second conditioning chip. Detailed Implementation

[0025] The following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0026] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise expressly indicated by the present invention, the singular form is intended to include the plural form as well. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0027] For ease of description, the words "up," "down," "left," and "right" appearing in this utility model only indicate that they are consistent with the up, down, left, and right directions of the accompanying drawings themselves, and do not limit the structure. They are merely for the purpose of facilitating the description of this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] Terminology Explanation: The terms "installation," "connection," "linking," and "fixing" in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal connection of two components or the interaction relationship between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0029] Example 1:

[0030] This embodiment provides a timing control circuit for an oxygen supply device, such as... Figure 1 As shown, the system includes an onboard power supply 1, a sequential oxygen supply control circuit 3, a pull-cord switch 4, and an electric explosion valve controller 5. It also includes a second relay K2 and a fourth relay K4. The onboard power supply 1 includes a 28VDC terminal and a GND terminal. The 28VDC terminal is connected to the positive terminal of the second relay K2 and the positive terminal of the fourth relay K4, respectively. The GND terminal is connected to the negative terminal of the second relay K2 through the pull-cord switch 4. A sequential oxygen supply control circuit 3 and the second relay K2 are connected between the positive and negative terminals of the fourth relay K4. The GND terminal of the onboard power supply 1 is connected to the negative terminal of the electric explosion valve controller 5. The positive terminal of the electric explosion valve controller 5 is connected to the 28VDC terminal of the onboard power supply 1 through the second relay K2.

[0031] When the passenger pulls the pull switch 4, it connects, and the GND terminal of the onboard power supply 1 is connected to the negative terminals of the second relay K2 and the third relay K3 through the pull switch 4, causing the second relay K2 and the third relay K3 to close. The closure of the second relay K2 causes the fourth relay K4 to close. Simultaneously, the 28VDC terminal of the onboard power supply 1 is converted to 3V through the power module and connected to the electric explosion valve controller 5. The electric explosion valve controller 5 controls the electric explosion valve located at the oxygen cylinder inlet to explode, allowing oxygen to be output from the oxygen cylinder to the face mask. After the fourth relay K4 closes, the 28VDC terminal of the onboard power supply 1 is connected to the timing oxygen supply control circuit 3. The timing oxygen supply control circuit 3 then controls the proportional valve 8 at the oxygen cylinder inlet to operate, outputting oxygen at different proportional flow rates according to different time periods.

[0032] Example 2:

[0033] An improved timing control circuit for an oxygen supply device, based on Embodiment 1, is as follows: Figure 1 As shown, it also includes a third relay K3, with a pull-cord switch 4 installed between the positive and negative terminals of the third relay K3, and the third relay K3 is installed between the positive and negative terminals of the second relay K2. When the third relay K3 is closed, the GND terminal of the machine power supply 1 is connected to the negative terminal of the second relay K2, the negative terminal of the third relay K3 itself, and the negative terminal of the fourth relay K4 through the third relay K3, so that the second relay K2, the third relay K3, and the fourth relay K4 remain in a normally closed state and are no longer controlled by the pull-cord switch 4, thereby realizing continuous oxygen supply to the oxygen mask.

[0034] The other parts of this embodiment are the same as those in Embodiment 1, so they will not be described again.

[0035] Example 3:

[0036] An oxygen supply equipment timing control circuit, improved based on embodiment 1 or 2, such as... Figure 1 The system also includes a bolt controller 2 and a discrete signal control switch assembly. The negative terminal of the bolt controller 2 is connected to the GND terminal of the onboard power supply 1, and the positive terminal of the bolt controller 2 is connected to the 28VDC terminal of the onboard power supply 1 through the discrete signal control switch assembly. The discrete signal control switch assembly includes a bolt discrete signal generation circuit 6 and a first relay K1. The bolt discrete signal generation circuit 6 is connected to the first relay K1, and the positive terminal of the bolt controller 2 is connected to the 28VDC terminal of the onboard power supply 1 through the first relay K1.

[0037] The discrete signal generation circuit 6 of the locking bolt is connected to the first relay K1 via the onboard cable. The discrete signal generation circuit 6 outputs a control signal, which causes the first relay K1 to close. At this time, the 28VDC terminal of the onboard power supply 1 is connected to the locking bolt controller 2. The locking bolt controller 2 is electrically connected to the electric locking bolt at the door of the oxygen mask storage compartment. The locking bolt controller 2 controls the electric locking bolt to open, so that the door of the oxygen mask storage compartment opens, ensuring that the oxygen mask falls normally.

[0038] The other parts of this embodiment are the same as those in Embodiment 1 or 2, so they will not be described again.

[0039] Example 4:

[0040] An oxygen supply equipment timing control circuit, improved based on any one of embodiments 1-3, such as... Figure 1 As shown, it also includes a test switch 7, which is located between the negative terminal of the fourth relay K4 and the GND terminal of the machine power supply 1.

[0041] With the pull-cord switch 4 not closed, opening the test switch 7 will close the fourth relay K4, connecting the 28VDC terminal of the machine's power supply 1 to the sequential oxygen supply control circuit 3, which will then begin operation. Because the pull-cord switch 4 is not closed, the second relay K2 is not yet engaged, preventing the 28VDC terminal of the machine's power supply 1 from being connected to the electric explosion valve controller 5. Consequently, the electric explosion valve will not trigger, and the oxygen cylinder will not output oxygen. When the sequential oxygen supply control circuit 3 is working normally, the built-in green light will illuminate; in case of a fault, the built-in red light will illuminate.

[0042] The other parts of this embodiment are the same as any one of embodiments 1-3, so they will not be described again.

[0043] Example 5:

[0044] An oxygen supply equipment timing control circuit, improved based on any one of embodiments 1-4, the timing oxygen supply control circuit 3 includes a clock source circuit, a timing conditioning circuit, a proportional valve control voltage conditioning circuit, and a proportional valve drive circuit. The input terminal of the clock source circuit is connected to the machine power supply 1 through a fourth relay K4. The output terminal of the clock source circuit is connected to the timing conditioning circuit. The output terminal of the timing conditioning circuit is connected to the proportional valve control voltage conditioning circuit. The output terminal of the proportional valve control voltage conditioning circuit is connected to the proportional valve drive circuit.

[0045] like Figure 2 and Figure 3As shown, the clock source circuit includes a first integrated IC chip U1 and a second integrated IC chip U2. The first integrated IC chip U1 inputs a first clock signal to the timing conditioning circuit, and the second integrated IC chip U2 inputs a second clock signal to the timing conditioning circuit.

[0046] like Figure 4 and Figure 5 As shown, the timing conditioning circuit includes a first conditioning chip U3 and a second conditioning chip U4. The first conditioning chip U3 is connected to the first integrated IC chip U1, and the second conditioning chip U4 is connected to the second integrated IC chip U2. The first conditioning chip U3 inputs a first conditioning signal to the proportional valve control voltage conditioning circuit, and the second conditioning chip U4 inputs a second conditioning signal to the proportional valve control voltage conditioning circuit.

[0047] like Figure 6 As shown, the proportional valve control voltage conditioning circuit includes several parallel D flip-flops 331. The output of each D flip-flop 331 is connected to the proportional valve drive circuit via an operational amplifier adder circuit, as shown below. Figure 7 As shown, the output terminal of the proportional valve drive circuit is connected to the proportional valve 8.

[0048] After the timing oxygen supply control circuit 3 is connected to the onboard power supply 1, a 60-second first clock signal is input to the timing conditioning circuit through the first integrated IC chip U1, and a 150-second second clock signal is input to the timing conditioning circuit through the second integrated IC chip U2. The two clock signals generated by the clock source circuit are input to the timing conditioning circuit. The first conditioning chip U3 conditions the first clock signal into a 150-second timing pulse signal, and the second conditioning chip U4 conditions the second clock signal into a 420-second timing pulse signal.

[0049] The timing conditioning circuit outputs a timing pulse signal to the proportional valve control voltage conditioning circuit. The timing pulse signal controls the voltage amplitude at the input of the operational amplifier adder circuit through the D flip-flop 331, thereby controlling the voltage amplitude output to the proportional valve drive circuit. The proportional valve drive circuit outputs the control voltage to the proportional valve 8, thereby adjusting the proportional valve 8 to open at different degrees at different times, thus adjusting the oxygen flow rate output from the oxygen cylinder at different times.

[0050] like Figure 6As shown, after the sequential oxygen supply control circuit 3 is powered on, all five D flip-flops 331 have output voltage. At this time, the voltage amplitude output to the proportional valve 8 through the proportional valve drive circuit is at its maximum, meaning the proportional valve 8 is at its maximum opening. The oxygen cylinder outputs oxygen at a flow rate of not less than 3.12 L / min. After 150 seconds, one of the D flip-flops 331 turns off, and the voltage amplitude output to the proportional valve 8 through the proportional valve drive circuit decreases, meaning the proportional valve 8 is at its minimum opening. The oxygen cylinder outputs oxygen at a flow rate of not less than 2.19 L / min. After 420 seconds, the next D flip-flop 331 turns off, and the voltage amplitude output to the proportional valve 8 through the proportional valve drive circuit continues to decrease, meaning the proportional valve 8 is at its minimum opening. The oxygen cylinder outputs oxygen at a flow rate of not less than 1.71 L / min until the oxygen is exhausted.

[0051] The other parts of this embodiment are the same as any one of embodiments 1-4, so they will not be described again.

[0052] The above are merely preferred embodiments of the present utility model and are 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. A timing control circuit for an oxygen supply device, comprising an on-board power supply (1), a timing oxygen supply control circuit (3), a pull-wire switch (4), and an electric explosion valve controller (5), characterized in that, It also includes a second relay (K2) and a fourth relay (K4). The onboard power supply (1) includes a 28VDC terminal and a GND terminal. The 28VDC terminal is connected to the positive terminal of the second relay (K2) and the positive terminal of the fourth relay (K4) respectively. The GND terminal is connected to the negative terminal of the second relay (K2) through a pull-wire switch (4). A timed oxygen supply control circuit (3) and the second relay (K2) are provided between the positive terminal and the negative terminal of the fourth relay (K4). The GND terminal of the onboard power supply (1) is connected to the negative terminal of the electric explosion valve controller (5). The positive terminal of the electric explosion valve controller (5) is connected to the 28VDC terminal of the onboard power supply (1) through the second relay (K2).

2. The timing control circuit for an oxygen supply device according to claim 1, characterized in that, It also includes a third relay (K3), a pull-wire switch (4) is provided between the positive and negative terminals of the third relay (K3), and the third relay (K3) is provided between the positive and negative terminals of the second relay (K2).

3. A timing control circuit for an oxygen supply device according to claim 1 or 2, characterized in that, It also includes a bolt controller (2) and a discrete signal control switch assembly. The negative terminal of the bolt controller (2) is connected to the GND terminal of the onboard power supply (1), and the positive terminal of the bolt controller (2) is connected to the 28VDC terminal of the onboard power supply (1) through the discrete signal control switch assembly.

4. The timing control circuit for an oxygen supply device according to claim 3, characterized in that, The discrete signal control switch assembly includes a bolt discrete signal generation circuit (6) and a first relay (K1). The bolt discrete signal generation circuit (6) is connected to the first relay (K1). The positive terminal of the bolt controller (2) is connected to the 28VDC terminal of the machine power supply (1) through the first relay (K1).

5. A timing control circuit for an oxygen supply device according to claim 1 or 2, characterized in that, It also includes a test switch (7), which is located between the negative terminal of the fourth relay (K4) and the GND terminal of the machine power supply (1).

6. A timing control circuit for an oxygen supply device according to claim 1 or 2, characterized in that, The timing oxygen supply control circuit (3) includes a clock source circuit, a timing conditioning circuit, a proportional valve control voltage conditioning circuit, and a proportional valve drive circuit. The input terminal of the clock source circuit is connected to the machine power supply (1) through the fourth relay (K4). The output terminal of the clock source circuit is connected to the timing conditioning circuit. The output terminal of the timing conditioning circuit is connected to the proportional valve control voltage conditioning circuit. The output terminal of the proportional valve control voltage conditioning circuit is connected to the proportional valve drive circuit.

7. The timing control circuit for an oxygen supply device according to claim 6, characterized in that, The clock source circuit includes a first integrated IC chip (U1) and a second integrated IC chip (U2). The first integrated IC chip (U1) inputs a first clock signal to the timing conditioning circuit, and the second integrated IC chip (U2) inputs a second clock signal to the timing conditioning circuit.

8. The timing control circuit for an oxygen supply device according to claim 7, characterized in that, The timing conditioning circuit includes a first conditioning chip (U3) and a second conditioning chip (U4). The first conditioning chip (U3) is connected to a first integrated IC chip (U1), and the second conditioning chip (U4) is connected to a second integrated IC chip (U2). The first conditioning chip (U3) inputs a first conditioning signal to the proportional valve control voltage conditioning circuit, and the second conditioning chip (U4) inputs a second conditioning signal to the proportional valve control voltage conditioning circuit.

9. The timing control circuit for an oxygen supply device according to claim 8, characterized in that, The proportional valve control voltage conditioning circuit includes several parallel D flip-flops (331), and the output of the D flip-flops (331) is connected to the proportional valve drive circuit through an operational amplifier adder circuit.

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