Oxygen switching control device

Abstract

The utility model provides an oxygen switching control device which comprises a pressure sensing assembly (2) and an oxygen source switching mechanism (3), the pressure sensing assembly is installed on a shell (1) of an oxygen pressure reducing device and used for recognizing the height of a cabin and detecting the pressure of pure oxygen and oxygen-enriched gas, and when the height of equipment is lower than 7.2 km, the oxygen source switching assembly (3) is powered off; and when the equipment height is 7.6 km + / -0.2 km or an onboard control signal is received, power is supplied to the oxygen source conversion assembly (3). And the oxygen source conversion mechanism is used for realizing conversion between pure oxygen and oxygen-enriched gas.

Description

Technical Field

[0001] The utility model belongs to the field of oxygen supply, and in particular relates to a control device for oxygen switching. Background Art

[0002] When pilots fly to high altitudes, they need an oxygen supply system to supply oxygen to the pilots.

[0003] Existing oxygen supply systems can provide pilots with both oxygen-enriched and pure oxygen, but they rely on cockpit pressure sensors to obtain information, which is then converted to altitude by the onboard control center and ultimately forwarded to the oxygen supply system to facilitate switching between the two. Furthermore, at least two pressure sensors are required to monitor the pressure of both the oxygen-enriched gas and the decompressed pure oxygen.

[0004] The existing oxygen supply system has problems such as complex structure, involving many products, and relying on the onboard control center. Utility Model Content

[0005] The purpose of the utility model is to provide an oxygen switching control device, which can control the switching of oxygen with different concentrations, reduce the high-pressure oxygen of the standby oxygen subsystem, monitor the reduced pressure of pure oxygen, the pressure of oxygen-enriched gas and the height of the product environment in real time, and switch between pure oxygen and oxygen-enriched gas when needed according to the height.

[0006] The utility model provides an oxygen switching control device for an onboard oxygen supply system, the onboard oxygen supply system comprising: an oxygen concentrator and an oxygen pressure reducing device, the oxygen concentrator being used to separate compressed air to produce oxygen-rich gas, the oxygen pressure reducing device being used to reduce the pressure of high-pressure pure oxygen gas and output it; the control device comprising: a pressure sensing component 2 and an oxygen source conversion component 3;

[0007] The pressure sensing component 2 and the oxygen source conversion component 3 are both installed on the housing 1 of the oxygen pressure reducing device;

[0008] The oxygen source conversion component 3 is a three-way air pressure solenoid valve. The first input interface of the three-way air pressure solenoid valve is connected to the oxygen-enriched gas output end of the oxygen concentrator, the second input interface is connected to the pure oxygen gas output end of the oxygen pressure reducing device, and the output interface is connected to the user. When the three-way air pressure solenoid valve is powered on, the second input interface and the output interface are connected. When the three-way air pressure solenoid valve is powered off, the first input interface and the output interface are connected.

[0009] The inner cavity of the pressure sensing component 2 is connected to the cabin environment through a φ0.1 small hole, which is used to sense the cabin environment pressure in real time and convert it into a current signal;

[0010] The pressure-sensing component 2 is connected to the control end of the three-way air pressure solenoid valve, and is used to cut off the power to the three-way air pressure solenoid valve when the three-way air pressure solenoid valve is energized and the current signal indicates that the cabin altitude drops below 7.2km; when the three-way air pressure solenoid valve is de-energized, if the current signal indicates that the cabin altitude rises to 7.6km±0.2km, the three-way air pressure solenoid valve is powered on.

[0011] Optionally, the pressure sensing component 2 is mounted on the side of the housing 1 using four M4 screws;

[0012] The oxygen source conversion assembly 3 is mounted on the bottom end of the housing 1 by four M3 screws.

[0013] Optionally, the vent hole is a φ8 hole.

[0014] Optionally, the inner diameter of the ventilation channel is φ6.

[0015] Optionally, the pressure sensing component 2 is connected to the pure oxygen gas output end of the oxygen pressure reducing device through the vent hole provided on the housing 1, and is connected to the oxygen-enriched gas output end through the ventilation channel provided on the housing 1;

[0016] The pressure sensing component 2 is used to monitor the pressure of the pure oxygen gas and oxygen-enriched gas output by the oxygen decompression device and send it to the onboard control center.

[0017] Optionally, the pressure sensing component 2 is further configured to send a current signal indicating the cabin altitude to an onboard control center.

[0018] Optionally, the output interface is connected to the user via an oxygen supply anti-g regulator.

[0019] Optionally, the pressure sensing component (2) includes: an absolute pressure core;

[0020] The absolute pressure core is used for real-time measurement of altitude.

[0021] The advantages of this utility model are as follows: it provides an oxygen switching control device that integrates the on / off function of a high-pressure solenoid valve and the oxygen source switching function, and can realize real-time pressure monitoring. By providing an altitude sensor, it automatically supplies power to the solenoid valve at a certain altitude, realizing automatic switching of the oxygen source at a certain altitude. It can monitor the pressure of the pure oxygen inlet and the oxygen-enriched gas inlet of the oxygen pressure reducing device, report the pressure signal, and simultaneously monitor the height of the device, output an electrical signal, and control the oxygen source switching mechanism to switch between pure oxygen and oxygen-enriched gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0023] Figure 1 This is the installation of the oxygen switching control device of the utility model Figure 1 ;

[0024] Figure 2 This is the installation of the oxygen switching control device of the utility model Figure 2 ;

[0025] Figure 3 This is a structural diagram of the oxygen switching control device of the utility model;

[0026] Description of reference numerals:

[0027] 1-Oxygen pressure reducing device;

[0028] 2-pressure sensing component;

[0029] 3-Oxygen source conversion component;

[0030] 4-spring;

[0031] 5- electromagnetic valve;

[0032] 6-Solenoid valve spring;

[0033] 7-Conversion spring;

[0034] 8-conversion diaphragm assembly;

[0035] 9-calibration hole;

[0036] 10-Oxygen supply anti-g regulator;

[0037] 11-Steel ball;

[0038] 12- pad;

[0039] 13-static valve core;

[0040] 14-moving valve core;

[0041] 15-valve;

[0042] 16-Oxygen concentrator;

[0043] a-first pressure-introducing pipe;

[0044] b-first pressure sensitive core;

[0045] c-second pressure-introducing pipe;

[0046] d-second pressure sensitive core;

[0047] e-Absolute pressure core. DETAILED DESCRIPTION

[0048] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is described in detail below with reference to the following embodiments. The following text is only used to describe one or several specific implementations of the present invention and does not strictly limit the scope of protection specifically claimed by the present invention.

[0049] The oxygen switching control device provided by the present invention is explained below with reference to the accompanying drawings.

[0050] like Figure 1-3 As shown, the utility model provides an oxygen switching control device for an onboard oxygen supply system, which includes: an oxygen concentrator 16 and an oxygen decompression device 1, wherein the oxygen concentrator 16 is used to separate compressed air to produce oxygen-rich gas, and the oxygen decompression device 1 is used to reduce the pressure of high-pressure pure oxygen gas and output it; the control device includes: a pressure sensing component 2 and an oxygen source conversion component 3;

[0051] The pressure sensing component 2 and the oxygen source conversion component 3 are both installed on the housing of the oxygen pressure reducing device 1;

[0052] The oxygen source conversion component 3 is a three-way air pressure solenoid valve. The first input interface of the three-way air pressure solenoid valve is connected to the oxygen-rich gas output end of the oxygen concentrator 16, and the second input interface is connected to the pure oxygen gas output end of the oxygen pressure reducing device 1. The output interface is connected to the user through the oxygen supply anti-load regulator 10. When the three-way air pressure solenoid valve is energized, the second input interface and the output interface are connected. When the three-way air pressure solenoid valve is de-energized, the first input interface and the output interface are connected.

[0053] The inner cavity of the pressure sensing component 2 is connected to the cabin environment through a φ0.1 small hole, which is used to sense the cabin environment pressure in real time and convert it into a current signal;

[0054] The pressure-sensing component 2 is connected to the control end of the three-way air pressure solenoid valve, and is used to cut off the power to the three-way air pressure solenoid valve when the three-way air pressure solenoid valve is energized and the current signal indicates that the cabin altitude drops below 7.2km; when the three-way air pressure solenoid valve is de-energized, if the current signal indicates that the cabin altitude rises to 7.6km±0.2km, the three-way air pressure solenoid valve is powered on.

[0055] Optionally, the pressure sensing component 2 is mounted on the side of the housing 1 using four M4 screws;

[0056] The oxygen source conversion assembly 3 is mounted on the bottom end of the housing 1 by four M3 screws.

[0057] Optionally, the pressure sensing component 2 is connected to the pure oxygen gas output end of the oxygen decompression device through the vent hole provided on the shell 1, and is connected to the oxygen-enriched gas output end through the vent channel provided on the shell 1.

[0058] Optionally, the vent hole is a φ8 hole.

[0059] Optionally, the inner diameter of the ventilation channel is φ6.

[0060] The pressure sensing component 2 is used to monitor the pressure of the pure oxygen gas and oxygen-enriched gas output by the oxygen decompression device and send it to the onboard control center.

[0061] Optionally, the pressure sensing component 2 is further configured to send a current signal indicating the cabin altitude to an onboard control center.

[0062] The utility model provides an oxygen switching control device, which includes the following parts (see attached Figure 2 and Figure 3 ): pressure sensing component 2 and oxygen source conversion component 3.

[0063] The oxygen source conversion assembly 3 includes: a spring 4, an electromagnetic valve 5, an electromagnetic valve spring 6, a conversion spring 7, a conversion diaphragm assembly 8, a calibrating hole 9, a steel ball 11, a pad 12, a static valve core 13, a dynamic valve core 14, and a valve 15.

[0064] The pure oxygen entering the pressure-sensing component 2 enters the first pressure-guiding tube a, which is connected to the first pressure-sensitive core b. The first pressure-sensitive core b converts the air pressure value into a current signal and uploads the current signal to the onboard control center through a cable, thereby realizing real-time monitoring of the decompression pressure.

[0065] At the same time, the composite sensor in the pressure sensing component 2 converts the air pressure value of the oxygen-rich gas into a current signal through the second pressure-introducing tube c and the second pressure-sensitive core d, and uploads the current signal to the connected control center through a cable, thereby realizing real-time monitoring of the product gas pressure.

[0066] The absolute pressure core e in the pressure sensing component 2 measures the height in real time, and when the height reaches a certain height, the power supply of the air pressure solenoid valve is turned on.

[0067] The air pressure solenoid valve comprises chambers A and B. The pure oxygen gas output of the oxygen pressure reducing device 1 is connected to chamber A, which serves as the second input interface. A valve seat and a switching diaphragm assembly 8 are located between chambers A and B. A calibrating hole 9 is provided between chambers A and B. Chamber B communicates with the output interface.

[0068] When the pneumatic solenoid valve is de-energized, the switching diaphragm assembly 8 rests on the valve seat, disconnecting chambers A and B. When the pneumatic solenoid valve is energized, the switching diaphragm assembly 8 disengages from the valve seat, connecting chambers A and B. A static valve core 13, a dynamic valve core 14, and a valve 15 are located at the end of chamber B; the dynamic valve core 14 and valve 15 are connected.

[0069] The oxygen concentrator 16 is connected to the first input interface. A one-way valve spring 4, a one-way valve steel ball 11 and a one-way valve seat 12 are arranged between the first input interface and the output interface.

[0070] Oxygen entering the oxygen source conversion assembly 3 flows into chambers A and B. When powered off, the pneumatic solenoid valve in the oxygen source conversion assembly generates no electromagnetic force. The combined effects of the oxygen pressure in chamber B and the elastic force of the solenoid valve spring 6 press the electromagnetic valve 5 airtightly against valve 15, isolating chamber B from the outside world. When powered on, the electromagnetic suction generated in the pneumatic solenoid valve pulls the movable valve core 14 toward the static valve core 13, disengaging the electromagnetic valve 5 from valve 15. Oxygen in chamber B flows into the outside world through the open valve 15. The oxygen pressure in chamber A overcomes the elastic force of the conversion spring 7, disengaging the conversion diaphragm assembly 8 from the valve seat, allowing oxygen in chamber A to flow out through the product outlet nozzle. Simultaneously, because the high-pressure pure oxygen supply pressure is greater than the oxygen-enriched oxygen supply pressure, the one-way valve steel ball 11 is airtightly pressed against the one-way valve seat 12 by the combined effects of the oxygen pressure and the elastic force of the one-way valve spring 4, achieving oxygen source conversion.

[0071] In the power-off state, the pressures in chambers A and B are the same. Under the elastic force of the conversion spring 7, the conversion diaphragm assembly 8 fits against the valve seat, disconnecting chambers A and B. When the user uses oxygen at the output interface, the gas pressure above the steel ball 11 is greater than the gas pressure below, thereby overcoming the elastic force of the spring 4 and pushing the steel ball 11 downward, leaving the one-way valve seat 12, and connecting the oxygen concentrator and the output interface.

[0072] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications should be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention shall, unless otherwise specified or limited, be implemented in accordance with conventional means in the art.

Claims

1. An oxygen switching control device for an onboard oxygen supply system, the onboard oxygen supply system comprising: An oxygen concentrator and an oxygen pressure reducing device, wherein the oxygen concentrator is used to separate compressed air to produce oxygen-rich gas, and the oxygen pressure reducing device is used to reduce the pressure of high-pressure pure oxygen gas and output it; the control device is characterized in that it includes: a pressure sensing component (2) and an oxygen source conversion component (3); The pressure sensing component (2) and the oxygen source conversion component (3) are both mounted on the housing (1) of the oxygen pressure reducing device; The oxygen source conversion component (3) is a three-way air pressure solenoid valve, a first input interface of the three-way air pressure solenoid valve is connected to the oxygen-enriched gas output end of the oxygen concentrator, a second input interface is connected to the pure oxygen gas output end of the oxygen pressure reducing device, and the output interface is connected to the user. When the three-way air pressure solenoid valve is powered on, the second input interface and the output interface are connected. When the three-way air pressure solenoid valve is powered off, the first input interface and the output interface are connected. The inner cavity of the pressure sensing component (2) is connected to the cabin environment through a φ0.1 small hole, and is used to sense the cabin environment pressure in real time and convert it into a current signal; The pressure sensing component (2) is connected to the control end of the three-way air pressure solenoid valve and is used to cut off the power to the three-way air pressure solenoid valve when the current signal indicates that the cabin altitude has dropped below 7.2 km when the three-way air pressure solenoid valve is powered on; and to supply power to the three-way air pressure solenoid valve when the current signal indicates that the cabin altitude has risen to 7.6 km ± 0.2 km when the three-way air pressure solenoid valve is powered off.

2. The oxygen switching control device according to claim 1, characterized in that: The pressure sensing component (2) is mounted on the side of the housing (1) via four M4 screws; The oxygen source conversion assembly (3) is mounted on the bottom end of the housing (1) via four M3 screws.

3. The oxygen switching control device according to claim 1, characterized in that: The pressure sensing component (2) is connected to the pure oxygen gas output end of the oxygen pressure reducing device through the vent hole provided on the housing (1), and is connected to the oxygen-enriched gas output end through the vent channel provided on the housing (1); The pressure sensing component (2) is used to monitor the pressure of the pure oxygen gas and the oxygen-enriched gas output by the oxygen decompression device and send the pressure to the onboard control center.

4. The oxygen switching control device according to claim 3, characterized in that: The vent hole is φ8mm.

5. The oxygen switching control device according to claim 3, characterized in that: The inner diameter of the ventilation channel is φ6mm.

6. The oxygen switching control device according to claim 1, characterized in that: The pressure sensing component (2) is also used to send a current signal indicating the cabin altitude to an onboard control center.

7. The oxygen switching control device according to claim 1, characterized in that: The output interface is connected to the user through the oxygen supply anti-g regulator.

8. The oxygen switching control device according to claim 1, characterized in that: The pressure sensing component (2) comprises: an absolute pressure core; The absolute pressure core is used for real-time measurement of altitude.

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