Air supply and water removal system for airborne oxygen production equipment

Abstract

The invention belongs to the technical field of aircraft environment control, and relates to an air supply and water removal system of airborne oxygen production equipment. A gas supply and water removal system of airborne oxygen production equipment comprises a dryer, a water separator and a two-position three-way electromagnetic valve, and the two-position three-way electromagnetic valve is connected with the dryer and an outlet of the water separator through pipelines. The dryer inlet is connected with the water separator outlet through a pipeline; the water separator is connected with the heat exchanger through a pipeline; and the airborne oxygen production equipment is connected with the two-position three-way electromagnetic valve through a pipeline. The invention has the following advantages: 1, the thermal regeneration of the dryer can be synchronously realized in the flight process, so that the size and the weight of the dryer are greatly reduced, and the dryer can be widely applied to an air supply system of airborne equipment and is free from maintenance in the service life of the dryer; 2, the water removal efficiency can reach 99% or above, the requirement for the air supply moisture content of airborne oxygen production is met, the service life of the oxygen concentrator can be greatly prolonged, and the working reliability of the oxygen concentrator can be greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of aircraft environment control and relates to an air supply and water removal system for airborne oxygen production equipment. Background Art

[0002] At present, the air supply source for onboard equipment on aircraft generally comes from the environmental control system. In order to ensure the life and working reliability of gas-using equipment such as molecular sieves and radars of oxygen concentrators, the airborne oxygen production has strict requirements on the moisture content of the air supply. To meet this requirement, the environmental control system needs to be equipped with an air supply dehydration system to remove water from the air supply through the centrifugal action of a high-pressure water separator. This dehydration method is affected by changes in the moisture content of the air supply (free water content), air supply flow rate, and air supply pressure. The actual water separation effect is not stable and is often lower than the design point, resulting in a high moisture content in the air supply, which cannot meet the requirements of onboard oxygen production, and further leads to a short life of the molecular sieve of the oxygen concentrator and more failures. In addition, the dehydration system using desiccant dehydration usually needs to be frequently disassembled and assembled for heat recovery dehydration, and has poor maintenance. Summary of the invention

[0003] The purpose of the present invention is to provide an air supply dehumidification system for an airborne oxygen generator, which is used to solve the problem of high moisture content in the air supply of the airborne oxygen generator and improve the service life and reliability of the airborne oxygen generator.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an air supply and water removal system for airborne oxygen production equipment, including a dryer, a water separator, and a two-position three-way solenoid valve, the two-position three-way solenoid valve is connected to the dryer and the water separator outlet through a pipeline; the dryer inlet is connected to the water separator outlet through a pipeline; the water separator is connected to the heat exchanger through a pipeline; the airborne oxygen production equipment is connected to the two-position three-way solenoid valve through a pipeline.

[0005] Preferably, the dryer has four interfaces, two of which are respectively connected to the water separator and the two-position three-way solenoid valve through pipelines, and the other two interfaces are respectively connected to the solenoid valve through pipelines. High-temperature air enters the dryer through solenoid valve A to dry the moisture adsorbed inside it, and then is discharged outside the machine through solenoid valve B to achieve thermal regeneration of the desiccant.

[0006] Preferably, a humidity sensor is provided on the pipeline between the dryer and the water separator, and the dry air supply or in-situ heat regeneration state is switched by the humidity sensor.

[0007] Preferably, the air supply and water removal system is provided with a flight altitude calculating sensor and a criterion for the flight altitude, and the dry air supply or in-situ heat regeneration state is switched according to the flight altitude.

[0008] Preferably, the dryer is filled with a universal desiccant that can adsorb water molecules.

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

[0010] Preferably, the two-position three-way solenoid valve is integrated into the onboard oxygen generator.

[0011] The working principle is: After the onboard oxygen supply is cooled by the heat exchanger and dehydrated by the water separator, if the moisture content of the supply air does not meet the requirements, the supply air will be dried by the dryer to obtain dry air, and then supplied to the onboard oxygen production equipment; when the moisture content of the supply air meets the use requirements, the supply air will be directly supplied to the onboard oxygen production equipment by switching the switch state of the solenoid valve, and another high-temperature air will be connected to perform in-situ thermal regeneration of the dryer to restore its dry air supply function.

[0012] Compared with the prior art, the present invention has the following advantages: 1. The dryer can be regenerated thermally during flight, which greatly reduces the size and weight of the dryer. It can be widely used in the air supply system of airborne equipment and is maintenance-free during the life of the dryer. 2. Combining the two dehydration methods of cyclone and dry adsorption, the dehydration efficiency can reach more than 99%, and the dehydration effect is stable and is not affected by the front-end air supply (air supply moisture content, air supply flow, air supply pressure), ensuring that the airborne oxygen supply moisture content requirements are met, which can greatly improve the life and working reliability of the oxygen concentrator. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of an embodiment of the present invention; Figure 1 Among them, 1. heat exchanger; 2. water separator; 3. humidity sensor; 4. one-way valve; 5. dryer; 6. two-position three-way solenoid valve; 7. onboard oxygen generator; 8. solenoid valve; 9. solenoid valve. DETAILED DESCRIPTION

[0014] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments: an air supply and water removal system for an onboard oxygen production equipment, 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 solenoid valve 6, a solenoid valve 8, a solenoid 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 solenoid valve 6 is connected to the outlet of the dryer 5 and the water separator 2 through a pipeline; the onboard oxygen production equipment 7 is connected to the two-position three-way solenoid valve 6 through a pipeline;.

[0015] The dryer 5 is filled with a universal desiccant that can adsorb water molecules, and has four interfaces, two of which are connected to the water separator 2 and the two-position three-way solenoid valve 6 through pipelines, and the other two interfaces are connected to the solenoid valve 8 and the solenoid valve 9 through pipelines, respectively. It has two working states: dry air supply and in-situ thermal regeneration; the two-position three-way solenoid valve 6 is connected to the water separator 2 and the outlet of the dryer 5, and can switch the air supply state and the working state of the dryer according to the signal of the humidity sensor 3 or the flight altitude.

[0016] When the humidity sensor 3 detects that the humidity of the air supply is too high, the dry air supply state is entered. The two-position three-way solenoid valve 6 connects the dryer 5 and the onboard oxygen generator 7, and the solenoid valve 8 is closed. After the high-temperature air is cooled by the heat exchanger 1 and dehydrated by the water separator 2, it enters the dryer 5 through the one-way valve 4 to remove the remaining free water and water vapor in the air supply, and then supplies the onboard oxygen generator 7.

[0017] When the humidity sensor 3 detects that the air supply humidity is low, it can be switched to the in-situ heat regeneration state. The two-position three-way solenoid valve 6 connects the water separator 2 and the onboard oxygen generator 7, and the solenoid valve 8 is opened. At this time, the high-temperature air can be directly supplied to the onboard oxygen generator 7 after passing through the heat exchanger 1 and the water separator 2. Another high-temperature air enters the dryer through the solenoid valve 8, dries the water adsorbed inside it, and then is discharged outside the machine through the solenoid valve 9 to realize the thermal regeneration of the desiccant. At this time, the one-way valve 4 can prevent the high-temperature air from flowing in the opposite direction.

[0018] The embodiment of the present invention discloses a typical airborne oxygen production and dehydration system. Other changes can be made according to the present invention, such as eliminating the humidity sensor and switching between dry air supply and in-situ heat regeneration state by flight altitude. For example, 5,000 meters is used as the limit (because above 5,000 meters, the free water in the air supply is already relatively low). The flight altitude below 5,000 meters is dehydrated by the dryer, and the flight altitude above 5,000 meters is switched to the dryer heat regeneration mode. Alternatively, a two-position three-way electromagnetic valve is integrated into the airborne oxygen production equipment, and other types of valves are used to replace the electromagnetic valve, which are all within the protection scope of the present invention.

Claims

1. An air supply and water removal system for an onboard oxygen production equipment, 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 outlets through pipelines; the dryer inlet is connected to the water separator outlet through pipelines; the water separator is connected to the heat exchanger through pipelines; and the onboard oxygen generator is connected to the two-position three-way solenoid valve through pipelines.

2. The air supply and water removal system for airborne oxygen generator according to claim 1, characterized in that: The dryer has four interfaces, two of which are connected to the water separator and the two-position three-way solenoid valve through pipelines, and the other two interfaces are connected to the solenoid valve through pipelines. High-temperature air enters the dryer through solenoid valve A, dries the moisture adsorbed inside it, and then is discharged outside the machine through solenoid valve B to realize thermal regeneration of the desiccant.

3. The air supply and water removal system for airborne oxygen production equipment according to claim 2 is characterized in that: A humidity sensor is provided on the pipeline between the dryer and the water separator, and the dry air supply or in-situ heat regeneration state is switched through the humidity sensor.

4. The air supply and water removal system for airborne oxygen production equipment according to claim 2 is characterized in that: The air supply and water removal system is provided with a flight altitude calculating sensor and a criterion related to the flight altitude, and the dry air supply or in-situ heat regeneration state is switched according to the flight altitude.

5. The air supply and water removal system for airborne oxygen production equipment according to claim 1 or 2, characterized in that: The dryer is filled with a universal desiccant that can absorb water molecules.

6. The air supply and water removal system for airborne oxygen production equipment according to claim 1 or 2, characterized in that: A one-way valve is arranged on the pipeline between the dryer and the water separator.

7. The air supply and water removal system for airborne oxygen production equipment according to claim 1 or 2, characterized in that: The two-position three-way solenoid valve is integrated into the onboard oxygen generator.

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