Oxygen production unit of three-bed type oxygen concentrator

Abstract

The utility model belongs to a molecular sieve oxygen production technology, and particularly relates to an oxygen production unit of a three-bed type oxygen concentrator. An oxygen generation unit and a sieve bed of a three-bed type oxygen concentrator matched with an existing airplane are both of independent structures, and are large in weight and boundary dimension and large in flow resistance. The three-bed type oxygen concentrator oxygen generation unit comprises a first molecular sieve bed, a second molecular sieve bed and a third molecular sieve bed which are coaxially arranged in a sleeve mode, the third molecular sieve bed forms an inner cylinder, the volumes of the three sieve beds are the same, the same end is provided with an inlet, and the other end is provided with an outlet. And the air inlets are communicated with the air storage tank through respective one-way valves. The sleeve type integral structure is compact, the pressure loss of the adsorption process is minimum, and the system volume is reduced by 35% and the weight is reduced by 30% on the premise of ensuring the oxygen production efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of molecular sieve oxygen generation, and particularly relates to an oxygen generation unit of a three-bed type oxygen concentrator. Technical Background

[0002] At present, the oxygen generation unit of the three-bed type oxygen concentrator supporting active service aircraft, such as Figure 1 shown, is composed of a first molecular sieve bed 1, a second molecular sieve bed 2, a third molecular sieve bed 3, a first one-way valve 1c, a second one-way valve 2c, a third one-way valve 3c and a gas storage tank 4. Among them, the first molecular sieve bed 1, the second molecular sieve bed 2 and the third molecular sieve bed 3 are all independent structures, with large weight and external dimensions and large flow resistance. Summary of the Utility Model

[0003] The purpose of the utility model is: the oxygen generation unit of the three-bed type oxygen concentrator proposed by the utility model solves the problem of reducing the volume and weight of the product while ensuring the oxygen generation efficiency.

[0004] The technical solution of the utility model is: an oxygen generation unit of a three-bed type oxygen concentrator, including a first molecular sieve bed, a second molecular sieve bed and a third molecular sieve bed arranged in a coaxial sleeve type. Among them, the third molecular sieve bed forms an inner cylinder. The volumes of the three sieve beds are the same, and there is an inlet at the same end and an outlet at the other end, and they are communicated with the gas storage tank through their respective one-way valves.

[0005] Advantageously, the first molecular sieve bed, the second molecular sieve bed and the third molecular sieve bed respectively have flush first inlets, second inlets and third inlets.

[0006] Advantageously, the first molecular sieve bed, the second molecular sieve bed and the third molecular sieve bed respectively have flush first outlets, second outlets and third outlets.

[0007] Advantageously, the first outlet is communicated with the gas storage tank through a first one-way valve; the second outlet is communicated with the gas storage tank through a second one-way valve; the third outlet is communicated with the gas storage tank through a third one-way valve.

[0008] Advantageously, the first molecular sieve bed forms the outermost sleeve, and the second molecular sieve bed forms the middle layer sleeve.

[0009] Advantageously, the lengths of the first molecular sieve bed, the second molecular sieve bed and the third molecular sieve bed are all H, and the diameter of the third molecular sieve bed is D, where H = 4D.

[0010] Advantageously, the filling amounts of each molecular sieve are the same.

[0011] The advantages of the utility model are: the sleeve type overall structure is compact, the pressure loss of the adsorption process is the smallest, and the system volume is reduced by 35% and the weight is the lightest by 30% while ensuring the oxygen generation efficiency. Description of the Drawings

[0012] Figure 1 is a configuration diagram of the oxygen generation unit of the current three-bed oxygen concentrator;

[0013] Figure 2 is a configuration diagram of the oxygen generation unit of the three-bed oxygen concentrator of the present utility model;

[0014] Figure 3 is a working timing diagram of the three molecular sieve beds of the present utility model. Detailed Description of the Invention

[0015] The present utility model will be further described in detail below.

[0016] Refer to Figure 2 , a three-bed oxygen concentrator oxygen generation unit, comprising a first molecular sieve bed 1, a second molecular sieve bed 2, a third molecular sieve bed 3, a first one-way valve 1c, a second one-way valve 2c, a third one-way valve 3c, and a gas storage tank 4.

[0017] Among them, the first molecular sieve bed 1, the second molecular sieve bed 2, and the third molecular sieve bed 3 are of an integrated sleeve structure. The first molecular sieve bed 1 forms the outermost sleeve, the second molecular sieve bed 2 forms the middle layer sleeve, and the third molecular sieve bed 3 forms the inner cylinder. The first inlets 1a, the second inlets 2a, and the third inlets 3a of the first molecular sieve bed 1, the second molecular sieve bed 2, and the third molecular sieve bed 3 are flush at the end, and the first outlets 1b, the second outlets 2b, and the third outlets 3b of the first molecular sieve bed 1, the second molecular sieve bed 2, and the third molecular sieve bed 3 are flush at the end.

[0018] The lengths of the first molecular sieve bed 1, the second molecular sieve bed 2, and the third molecular sieve bed 3 are H, and the diameter of the third molecular sieve bed 3 is D, where H = 4D.

[0019] The volumes of the first molecular sieve bed 1, the second molecular sieve bed 2, and the third molecular sieve bed 3 are the same, and the molecular sieve filling amounts are the same.

[0020] Compressed air enters the sieve bed from the inlet 1a of the first molecular sieve bed 1, and the produced oxygen-rich gas is collected and enters the one-way valve 1c through the outlet 1b, and the diaphragm valve is opened to enter the gas storage tank 4. Compressed air enters the sieve bed from the inlet 2a of the second molecular sieve bed 2, and the produced oxygen-rich gas is collected and enters the one-way valve 2c through the outlet 2b, and the diaphragm valve is opened to enter the gas storage tank 4. Compressed air enters the sieve bed from the inlet 3a of the third molecular sieve bed 3, and the produced oxygen-rich gas is collected and enters the one-way valve 3c through the outlet 3b, and the diaphragm valve is opened to enter the gas storage tank 4.

[0021] As shown in Figure 3As shown, the first molecular sieve bed 1, the second molecular sieve bed 2, and the third molecular sieve bed 3 alternately cycle and work with a 1 / 3 cycle phase difference, and the output oxygen-rich product gas enters the gas storage tank 4.

[0022] The working principle of the present utility model is that the treated compressed air enters the first molecular sieve bed 1, the second molecular sieve bed 2, and the third molecular sieve bed 3 according to Figure 3 the time sequence respectively. The oxygen-rich gas produced sequentially opens the first one-way valve 1c, the second one-way valve 2c, and the third one-way valve 3c according to a certain program. The three molecular sieve beds alternately cycle and work with a 1 / 3 cycle phase difference, continuously outputting oxygen-rich product gas into the gas storage tank 4 and introducing it into the downstream oxygen supply system for the use of pilots.

Claims

1. A three-bed oxygen concentrator oxygen production unit, characterized in that: The invention comprises a first molecular sieve bed (1), a second molecular sieve bed (2) and a third molecular sieve bed (3) arranged in a coaxial sleeve type, wherein the third molecular sieve bed (3) constitutes an inner cylinder, the three sieve beds have the same volume, have an inlet at the same end and an outlet at the other end, and are connected to a gas storage tank (4) through respective one-way valves.

2. The three-bed oxygen concentrator oxygen production unit according to claim 1, characterized in that: The first molecular sieve bed (1), the second molecular sieve bed (2) and the third molecular sieve bed (3) respectively have a flush first inlet (1a), a second inlet (2a) and a third inlet (3a).

3. The three-bed oxygen concentrator oxygen production unit according to claim 2, characterized in that: The first molecular sieve bed (1), the second molecular sieve bed (2) and the third molecular sieve bed (3) respectively have a flush first outlet (1b), a second outlet (2b) and a third outlet (3b).

4. The three-bed oxygen concentrator oxygen production unit according to claim 3, characterized in that: The first outlet (1b) is connected to the gas storage tank (4) via a first one-way valve (1c); the second outlet (2b) is connected to the gas storage tank (4) via a second one-way valve (2c); and the third outlet (3b) is connected to the gas storage tank (4) via a third one-way valve (3c).

5. The three-bed oxygen concentrator oxygen production unit according to claim 4, characterized in that: The first molecular sieve bed (1) constitutes the outermost sleeve, and the second molecular sieve bed (2) constitutes the middle sleeve.

6. The three-bed oxygen concentrator oxygen production unit according to any one of claims 1 to 5, characterized in that: The lengths of the first molecular sieve bed (1), the second molecular sieve bed (2) and the third molecular sieve bed (3) are all H, and the diameter of the third molecular sieve bed (3) is D, wherein H=4D.

7. The three-bed oxygen concentrator oxygen production unit according to claim 6, characterized in that: The molecular sieve loading amounts of the first molecular sieve bed (1), the second molecular sieve bed (2) and the third molecular sieve bed (3) are the same.

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