Oxygen switching control device

Abstract

The invention 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 equipment height 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 invention belongs to the field of oxygen supply, and in particular relates to a control device for oxygen switching. Background Art

[0002] When pilots fly at high altitudes, an oxygen supply system is needed to supply oxygen to the pilots.

[0003] The existing oxygen supply system can provide pilots with oxygen-enriched gas and pure oxygen, but it needs to obtain information from the air pressure sensor in the aircraft cabin, convert the altitude through the onboard control center, and finally forward it to the oxygen supply system to facilitate the oxygen supply system to switch between the two. In addition, at least two pressure sensors need to be set up to monitor the pressure of oxygen-enriched gas and pure oxygen after decompression.

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

[0005] The purpose of the present invention is: the present invention provides a control device for oxygen switching, which can control the switching of oxygen of different concentrations, reduce the pressure of high-pressure oxygen in the standby oxygen subsystem, monitor the pure oxygen reduced pressure, oxygen-rich gas pressure and the height of the product environment in real time, and switch between pure oxygen and oxygen-rich gas when needed according to the height.

[0006] The present invention provides an oxygen switching control device for an onboard oxygen supply system, the onboard oxygen supply system comprising: an oxygen concentrator and an oxygen decompression device, the oxygen concentrator is used to separate compressed air to produce oxygen-rich gas, the oxygen decompression device is used to decompress and output high-pressure pure oxygen gas; the control device comprises: 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-rich 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, and 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 installed on the side of the housing 1 by four M4 screws;

[0012] The oxygen source conversion assembly 3 is mounted on the bottom end of the housing 1 by means of 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 shell 1, and is connected to the oxygen-enriched gas output end through the vent channel provided on the shell 1;

[0016] The pressure sensing component 2 is used to monitor the pressure of 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 also used 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) comprises: an absolute pressure core;

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

[0021] The advantages of the present invention are as follows: the present invention provides an oxygen switching control device, which integrates the on-off function of a high-pressure electromagnetic valve and the oxygen source conversion function, and can realize real-time pressure monitoring; by setting a height sensor, automatically supplying power to the electromagnetic valve at a certain height, automatic switching of the oxygen source at a certain height can be realized. It can realize the pressure monitoring of the pure oxygen inlet and the oxygen-rich gas inlet in the oxygen pressure reducing device, report the pressure signal, monitor the height of the equipment at the same time, output an electrical signal, and control the conversion of the pure oxygen and oxygen-rich gas by the oxygen source conversion mechanism. 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 briefly introduces 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 creative labor.

[0023] Figure 1 The installation of the control device for oxygen switching of the present invention Figure 1 ;

[0024] Figure 2 The installation of the control device for oxygen switching of the present invention Figure 2 ;

[0025] Figure 3 is a structural diagram of the control device for oxygen switching of the present invention;

[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- calibrating hole;

[0036] 10- oxygen supply anti-load 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-the first pressure-introducing pipe;

[0044] b-first pressure sensitive core;

[0045] c- the 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 specifically described below in conjunction with the embodiments. The following text is only used to describe one or several specific implementations of the present invention, and does not strictly limit the protection scope of the specific claims of 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 present invention provides an oxygen switching control device for an onboard oxygen supply system, the onboard oxygen supply system comprising: an oxygen concentrator 16 and an oxygen decompression device 1, the oxygen concentrator 16 is used to separate compressed air to produce oxygen-rich gas, the oxygen decompression device 1 is used to decompress and output high-pressure pure oxygen gas; the control device comprises: 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; 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, the second input interface is connected to the pure oxygen gas output end of the oxygen pressure reducing device 1, and 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 powered on, the second input interface is connected to the output interface, and when the three-way air pressure solenoid valve is powered off, the first input interface is connected to the output interface;

[0052] 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;

[0053] 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.

[0054] Optionally, the pressure sensing component 2 is installed on the side of the housing 1 by four M4 screws;

[0055] The oxygen source conversion assembly 3 is mounted on the bottom end of the housing 1 by means of four M3 screws.

[0056] 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 shell 1 , and is connected to the oxygen-enriched gas output end through the vent channel provided on the shell 1 .

[0057] Optionally, the vent hole is a φ8 hole.

[0058] Optionally, the inner diameter of the ventilation channel is φ6.

[0059] The pressure sensing component 2 is used to monitor the pressure of pure oxygen gas and oxygen-enriched gas output by the oxygen decompression device and send it to the onboard control center.

[0060] Optionally, the pressure sensing component 2 is also used to send a current signal indicating the cabin altitude to an onboard control center.

[0061] The present invention provides an oxygen switching control device, comprising the following parts (see attached Figure 2 and Figure 3 ): pressure sensing component 2 and oxygen source conversion component 3.

[0062] The oxygen source conversion component 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 cushion block 12, a static valve core 13, a dynamic valve core 14, and a valve 15.

[0063] The pure oxygen entering the pressure-sensing component 2 enters the first pressure-guiding pipe 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.

[0064] 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 pipe 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.

[0065] 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.

[0066] The air pressure solenoid valve includes chamber A and chamber B. The pure oxygen gas output end of the oxygen pressure reducing device 1 is connected to chamber A as the second input interface. A valve seat and a conversion diaphragm assembly 8 are arranged between chamber A and chamber B. A sizing hole 9 is arranged between chamber A and chamber B. Chamber B is connected to the output interface.

[0067] When the air pressure solenoid valve is powered off, the conversion diaphragm assembly 8 is attached to the valve seat, and the A cavity is not connected with the B cavity. When the air pressure solenoid valve is powered on, the conversion diaphragm assembly 8 is separated from the valve seat, and the A cavity is connected with the B cavity. The end of the B cavity is provided with a static valve core 13, a moving valve core 14 and a valve 15; the moving valve core 14 and the valve 15 are connected.

[0068] The oxygen concentrator 16 is connected to the first input interface, and 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.

[0069] The oxygen entering the oxygen source conversion assembly 3 flows into the A chamber and the B chamber. In the power-off state, the air pressure solenoid valve in the oxygen source conversion assembly does not generate electromagnetic force, and the electromagnetic valve 5 is pressed against the valve 15 in an airtight manner under the combined action of the oxygen pressure in the B chamber and the elastic force of the electromagnetic valve spring 6, ensuring that the B chamber is isolated from the outside world; in the power-on state, the electromagnetic suction force generated in the air pressure solenoid valve pulls the moving valve core 14 toward the static valve core 13, and the electromagnetic valve 5 in the air pressure solenoid valve is separated from the valve 15, and the oxygen in the B chamber flows into the outside world through the opened valve 15. The conversion diaphragm assembly 8 overcomes the elastic force of the conversion spring 7 under the action of the oxygen pressure in the A chamber, and separates the conversion diaphragm assembly 8 from the valve seat, so that the oxygen in the A chamber can flow out through the product outlet nozzle. At the same time, since the oxygen supply pressure of high-pressure pure oxygen is greater than the oxygen supply pressure of rich oxygen, the one-way valve steel ball 11 is pressed against the one-way valve seat 12 in an airtight manner under the combined action of the oxygen pressure and the elastic force of the one-way valve spring 4, realizing the oxygen source conversion.

[0070] In the power-off state, the pressures in chamber A and chamber B are consistent, and the conversion diaphragm assembly 8, under the elastic force of the conversion spring 7, fits against the valve seat to disconnect chamber A and chamber B; when the user uses the 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, pushing the steel ball 11 to move downward, leaving the one-way valve seat 12, and connecting the oxygen concentrator and the output interface.

[0071] The above is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art unless otherwise specified and limited.

Claims

1. An oxygen switching control device, used in an onboard oxygen supply system, the onboard oxygen supply system comprising: An oxygen concentrator and an oxygen decompression device, wherein the oxygen concentrator is used to separate compressed air to produce oxygen-rich gas, and the oxygen decompression device is used to decompress and output high-pressure pure oxygen gas; the control device is characterized in that the control device comprises: 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 installed 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-rich 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 is connected to the output interface, and when the three-way air pressure solenoid valve is powered off, the first input interface is connected to the output interface. 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) by means of four M4 screws; The oxygen source conversion assembly (3) is mounted on the bottom end of the housing (1) by means of 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 shell (1), and is connected to the oxygen-enriched gas output end through the vent channel provided on the shell (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 transmit the pressure to the onboard control center.

4. The oxygen switching control device according to claim 3, characterized in that: The ventilation hole is a hole of 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-load 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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