Air supply and water removal system for an on-board oxygen generation device

Abstract

The present application belongs to the field of aircraft environmental control technology, and relates to an air supply and water removal system of an airborne oxygen generating device. The air supply and water removal system of the airborne oxygen generating device comprises a dryer, a water separator, a two-position three-way electromagnetic valve, a pipeline connecting the two-position three-way electromagnetic valve with the dryer and the water separator outlet, a pipeline connecting the dryer inlet with the water separator outlet, a pipeline connecting the water separator with a heat exchanger, and a pipeline connecting the airborne oxygen generating device with the two-position three-way electromagnetic valve. The present application has the following advantages: 1. The heat regeneration of the dryer can be realized simultaneously during the flight, so that the volume and weight of the dryer are greatly reduced, the dryer can be widely applied to the air supply system of the airborne device, and the maintenance of the dryer is not required during the service life of the dryer; 2. The water removal efficiency can reach more than 99%, so that the moisture content requirement of the air supply of the airborne oxygen generating device is met, and the service life and working reliability of the oxygen concentrator are greatly improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of aircraft environmental control, and relates to an air supply and water removal system of an airborne oxygen generating device. BACKGROUND

[0002] At present, the air supply source of the airborne device on the aircraft is generally from the environmental control system. In order to ensure the service life and working reliability of the gas-consuming devices such as the molecular sieve of the oxygen concentrator and the radar, the airborne oxygen generation has a relatively strict requirement on the moisture content of the air supply. In order to meet the requirement, the environmental control system needs to be provided with an air supply and water removal system, and the centrifugal action of the high-pressure water separator is used for air supply and water removal. The water removal mode is affected by the changes of the moisture content (free water content) of the air supply, the air supply flow, the air supply pressure and the like, and the actual water removal effect is not stable, and is often lower than the design point, so that the moisture content of the air supply is high, the requirement of the airborne oxygen generation on the air supply cannot be met, and the service life of the molecular sieve of the oxygen concentrator is short and the failure is more. SUMMARY

[0003] The purpose of the present application is to provide an air supply and water removal system of an airborne oxygen generating device, which is used for solving the problem of high moisture content of the air supply of the airborne oxygen generating device and improving the service life and reliability of the airborne oxygen generating device.

[0004] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: an air supply and water removal system of an airborne oxygen generating device, comprising a dryer, a water separator, further comprising a two-position three-way electromagnetic valve, the two-position three-way electromagnetic valve being connected with the dryer and the outlet of the water separator through pipelines; the inlet of the dryer being connected with the outlet of the water separator through a pipeline; the water separator being connected with a heat exchanger through a pipeline; and the airborne oxygen generating device being connected with the two-position three-way electromagnetic valve through a pipeline.

[0005] Preferably, the dryer has four interfaces, two of which are connected with the water separator and the two-position three-way electromagnetic valve through pipelines respectively, and the other two interfaces are connected with the electromagnetic valves through pipelines respectively. High-temperature air enters the dryer through the electromagnetic valve A, blows off the water molecules adsorbed in the dryer, and then is discharged outside through the electromagnetic valve B, so as to realize the heat regeneration of the drying agent.

[0006] Preferably, a humidity sensor is arranged on the pipeline between the dryer and the water separator, and the switching between the dry air supply and the in-situ heat regeneration state is realized through the humidity sensor.

[0007] Preferably, the air supply and water removal system is provided with a flight altitude calculation sensor, and a criterion related to the flight altitude is set, and the switching between the dry air supply and the in-situ heat regeneration state is realized through the flight altitude.

[0008] Preferably, the dryer is filled with a general drying agent capable of adsorbing water molecules.

[0009] Preferably, a one-way valve is arranged on the pipeline between the dryer and the water separator.

[0010] Preferably, the two-position three-way electromagnetic valve is integrated into the on-board oxygen generating device.

[0011] The working principle is as follows:

[0012] After the on-board oxygen supply is cooled by the heat exchanger and water is removed by the water separator, if the moisture content of the supply air does not meet the requirements, the supply air is dried by the dryer to obtain dry air, which is then supplied to the on-board oxygen generating device; when the moisture content of the supply air meets the use requirements, the supply air is directly supplied to the on-board oxygen generating device by switching the on-off state of the electromagnetic valve, and a high-temperature air is connected to the dryer for in-situ heat regeneration, so that the function of drying the supply air is restored.

[0013] Compared with the prior art, the present application has the following advantages:

[0014] 1. The heat regeneration of the dryer can be realized simultaneously during flight, so that the volume and weight of the dryer are greatly reduced, the dryer can be widely applied to the on-board device air supply system, and the dryer is free from maintenance during its service life.

[0015] 2. The water removal efficiency can reach more than 99% by combining the cyclone type and dry adsorption type water removal methods, the water removal effect is stable, is not affected by the front-end supply air (moisture content, flow rate, and pressure of the supply air), and can meet the on-board oxygen supply moisture content requirements, so that the service life and working reliability of the oxygen concentrator can be greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is the principle diagram of the embodiment of the present application;

[0017] Figure 1 In the figure, 1 is a heat exchanger, 2 is a water separator, 3 is a humidity sensor, 4 is a one-way valve, 5 is a dryer, 6 is a two-position three-way electromagnetic valve, 7 is an on-board oxygen generating device, 8 is an electromagnetic valve, and 9 is an electromagnetic valve. DETAILED DESCRIPTION

[0018] The present application is further described below in conjunction with the accompanying drawings and specific embodiments: An air supply water removal system of an airborne oxygen generating device, comprising a heat exchanger 1, a water separator 2, a humidity sensor 3, a one-way valve 4, a dryer 5, a two-position three-way electromagnetic valve 6, an electromagnetic valve 8, an electromagnetic valve 9 and connecting pipelines; the heat exchanger 1 has a cooling air inlet, a cooling air outlet and a high-temperature air inlet, and the heat exchanger 1 is connected to the water separator 2 through a pipeline; the humidity sensor 3 is arranged on the pipeline between the dryer 5 and the water separator 2; the one-way valve 4 is arranged on the pipeline between the dryer 5 and the water separator 2; the inlet of the dryer 5 is connected to the outlet of the water separator 2 through a pipeline; the two-position three-way electromagnetic valve 6 is connected to the dryer 5 and the outlet of the water separator 2 through a pipeline; and the airborne oxygen generating device 7 is connected to the two-position three-way electromagnetic valve 6 through a pipeline.

[0019] The dryer 5 is filled with a general-purpose drying agent capable of adsorbing water molecules and has four interfaces, two of which are respectively connected to the water separator 2 and the two-position three-way electromagnetic valve 6 through pipelines, and the other two are respectively connected to the electromagnetic valve 8 and the electromagnetic valve 9 through pipelines, so as to have two working states of drying the supply air and in-situ heat regeneration; the two-position three-way electromagnetic valve 6 is connected to the water separator 2 and the outlet of the dryer 5, and can switch the supply air state and the working state of the dryer according to the signal of the humidity sensor 3 or the flight height.

[0020] When the humidity sensor 3 detects that the humidity of the supply air is too high, the drying supply air state is entered. The two-position three-way electromagnetic valve 6 connects the dryer 5 and the airborne oxygen generating device 7, and the electromagnetic valve 8 is closed. The high-temperature air is cooled by the heat exchanger 1, removed of water by the water separator 2, then enters the dryer 5 through the one-way valve 4 to remove the remaining free water and water vapor in the supply air, and then is supplied to the airborne oxygen generating device 7.

[0021] When the humidity sensor 3 detects that the humidity of the supply air is too low, the in-situ heat regeneration state can be switched to. The two-position three-way electromagnetic valve 6 connects the water separator 2 and the airborne oxygen generating device 7, and the electromagnetic valve 8 is opened. At this time, the high-temperature air can be directly supplied to the airborne oxygen generating device 7 after passing through the heat exchanger 1 and the water separator 2. Another route of high-temperature air enters the dryer through the electromagnetic valve 8 to dry the water adsorbed in the dryer, and then is discharged outside through the electromagnetic valve 9 to realize the heat regeneration of the drying agent. At this time, the one-way valve 4 can prevent the reverse flow of the high-temperature air.

[0022] The embodiment of the present application discloses a typical on-board oxygen generation and water removal system composition, and other changes can be made according to the present application, such as canceling the humidity sensor, and switching the dry gas supply or in-situ heat regeneration state by the flight height, for example, taking 5000 meters as the boundary (because above 5000 meters, the free water in the gas supply is already insufficient), the flight height below 5000 meters is dried by the dryer, and the flight height above 5000 meters is switched to the heat regeneration mode of the dryer. Or integrating two three-way electromagnetic valves into the on-board oxygen generation equipment, and replacing the electromagnetic valve with other types of valves, all of which are within the protection scope of the present application.

Claims

1. An airborne oxygen generator gas supply and water removal system, comprising a dryer and a water separator, characterized in that: It also includes a two-position three-way solenoid valve, which is connected to the dryer and water separator outlet via pipelines; the dryer inlet is connected to the water separator outlet via pipelines; the water separator is connected to the heat exchanger via pipelines; and the airborne oxygen generator is connected to the two-position three-way solenoid valve via pipelines. The dryer has four ports. Two ports are connected to the water separator and the two-position three-way solenoid valve respectively through pipelines. The other two ports are connected to the solenoid valves respectively through pipelines. A stream of high-temperature air enters the dryer through solenoid valve A, blows away the moisture adsorbed inside, and then exits the machine through solenoid valve B, realizing the thermal regeneration of the desiccant. A humidity sensor is installed on the pipeline between the dryer and the water separator to switch between drying air supply and in-situ heat regeneration.

2. The airborne oxygen generator gas supply and water removal system according to claim 1, characterized in that: The gas supply and dehydration system is equipped with a flight altitude calculation sensor and has a criterion for flight altitude. The system switches between dry gas supply and in-situ thermal regeneration states based on the flight altitude.

3. The airborne oxygen generator gas supply and water removal system according to claim 1, characterized in that: The dryer is filled with a general-purpose desiccant that can adsorb water molecules.

4. The airborne oxygen generator gas supply and water removal system according to claim 1, characterized in that: A one-way valve is installed on the pipeline between the dryer and the water separator.

5. The airborne oxygen generator gas supply and water removal system according to claim 1, characterized in that: Two-position three-way solenoid valves are integrated into the airborne oxygen generator.

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