Molecular sieve throttling structure of oxygen generator

Abstract

The utility model discloses a molecular sieve throttling structure of an oxygen generator, which comprises two molecular sieve drums arranged in parallel and arranged on a cover plate, and is characterized in that a first air outlet channel and a second air outlet channel corresponding to the two molecular sieve drums are arranged on the cover plate; a first throttling valve is arranged in the first air outlet channel, and a second throttling valve is arranged in the second air outlet channel. The air outlet cover is fixed on the cover plate, and the air outlet cover is provided with an inner cavity and an air pipe joint communicated with the inner cavity; the first air outlet channel and the second air outlet channel are both communicated with the inner cavity. The air outlet device is simple to assemble, and only the throttle valve needs to be pressed into the cover plate of the molecular sieve cylinder during installation, and then the air outlet cover is fixed on the cover plate through the fastener; meanwhile, compared with the prior art, a blowback pipeline is omitted, and the oxygen generator is particularly suitable for miniaturized oxygen generator equipment.

Description

Technical Field

[0001] The utility model relates to a molecular sieve throttling structure of an oxygen generator, belonging to the technical field of oxygen generators. Background Art

[0002] Existing oxygen generators mainly use the principle of pressure swing adsorption technology to produce oxygen. This solution requires compressed air after being pressurized by a compressor to pass through a molecular sieve to obtain a gas stream with a relatively high oxygen concentration. Nitrogen will accumulate in the molecular sieve during the oxygen production process. If the nitrogen concentration is too high, it will affect the oxygen production efficiency, so it needs to be discharged regularly. In order to improve the oxygen production efficiency of the whole machine, the industry generally adopts a scheme of alternating oxygen production with two cylinders of molecular sieves. The outlets of the two cylinders of molecular sieves are respectively connected to a gas pipe, and finally are connected in parallel to the same outlet pipeline. During operation, one molecular sieve cylinder produces oxygen, and part of the oxygen enters the other molecular sieve cylinder through a throttle valve to discharge nitrogen.

[0003] The utility model patent with the publication number CN215855114U discloses a common throttle valve setting scheme. In this scheme, the throttle valve is placed in the backflush pipeline. The backflush pipelines are respectively connected from the outlets of the two molecular sieve cylinders, and the throttle valve is placed in the backflush pipeline. Although this scheme has a simple structure, its assembly efficiency is low, and the backflush pipeline occupies a large space, resulting in low utilization rate of the internal space of the oxygen generator. Summary of the Utility Model

[0004] In order to overcome the problems existing in the prior art, the utility model provides a molecular sieve throttling structure of an oxygen generator, which not only simplifies the assembly of the structure, but also is beneficial to improving the utilization rate of the internal space of the oxygen generator. The specific technical solutions are as follows.

[0005] A molecular sieve throttling structure of an oxygen generator includes two molecular sieve cylinders arranged in parallel. Both of the two molecular sieve cylinders are arranged on a cover plate. It is characterized in that: a first air outlet channel and a second air outlet channel corresponding to the two molecular sieve cylinders are arranged on the cover plate, a first throttle valve is arranged in the first air outlet channel, and a second throttle valve is arranged in the second air outlet channel;

[0006] It further includes an air outlet cover. The air outlet cover is fixed to the cover plate. The air outlet cover has an inner cavity and a gas pipe joint communicated with the inner cavity; both the first air outlet channel and the second air outlet channel are communicated with the inner cavity.

[0007] By adopting the above technical solution, the first throttle valve and the second throttle valve are arranged on the cover plate, and the first air outlet channel and the second air outlet channel where the throttle valves are located are both communicated with the inner cavity of the air outlet cover. In this way, the backflush pipeline in the prior art is cancelled, and the utilization rate of the internal space of the oxygen generator is greatly improved.

[0008] Furthermore, both the first throttle valve and the second throttle valve are throttle orifices with a certain aperture diameter provided on the cover plate. That is to say, the first throttle valve and the second throttle valve are formed during the molding process of the cover plate, as long as the throttle orifice can meet the throttle performance of the molecular sieve cylinder of the oxygen generator.

[0009] Furthermore, both the first air outlet channel and the second air outlet channel include throttle valve mounting holes. A first throttle valve is provided in the throttle valve mounting hole of the first air outlet channel, and a second throttle valve is provided in the throttle valve mounting hole of the second air outlet channel. Preferably, the first throttle valve, the second throttle valve and the throttle valve mounting hole are in interference fit. The first throttle valve and the second throttle valve adopt throttle valves in the prior art and can be directly purchased on the market. The interference fit between the throttle valve and the throttle valve mounting hole is conducive to simplifying the assembly process of the throttle valve.

[0010] Furthermore, a chip receiving ring groove is provided at the inner end of the throttle valve mounting hole. The chip receiving ring groove can prevent the situation that the throttle valve is not properly installed when the throttle valve is inserted into the throttle valve mounting hole and scrapes the plastic on the side wall of the throttle valve mounting hole to the bottom of the throttle valve mounting hole.

[0011] Furthermore, a sealing ring is provided between the air outlet cover and the cover plate. Preferably, a groove surrounding the first air outlet channel and the second air outlet channel is provided on the cover plate, and the sealing ring is arranged in the groove. The sealing between the air outlet cover and the cover plate is achieved by setting the sealing ring to prevent oxygen from overflowing. The air outlet cover is fixed to the cover plate by fasteners.

[0012] Furthermore, a limiting plate is provided on the inner wall of the air outlet cover, and the limiting plate corresponds to the first throttle valve and the second throttle valve. The limiting plate helps to prevent the throttle valve from falling out of the throttle valve mounting hole.

[0013] Based on the same inventive concept, the present utility model also relates to an oxygen generator having the above-mentioned molecular sieve throttle structure.

[0014] The assembly of the present utility model is simple. During installation, only the throttle valve needs to be pressed into the cover plate of the molecular sieve cylinder, and then the air outlet cover is fixed to the cover plate by fasteners. At the same time, compared with the prior art, the back-blowing pipeline is cancelled, which is particularly suitable for miniaturized oxygen generator equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the molecular sieve throttle structure of the present utility model;

[0016] Figure 2 is a partial cross-sectional view of the cover plate;

[0017] Figure 3It is a partial sectional view of the molecular sieve throttling structure of the present utility model.

[0018] In the figure: molecular sieve cylinder 1, cover plate 2, first throttle valve 3, second throttle valve 4, air outlet cover 5, sealing ring 6, fixing hole 7, first air outlet channel 2.1, second air outlet channel 2.2, throttle valve mounting hole 2.3, chip-containing ring groove 2.4, groove 2.5, inner cavity 5.1, air pipe joint 5.2, limiting plate 5.3. Specific embodiments

[0019] The present utility model will be further described in detail below with reference to the accompanying drawings.

[0020] See Figures 1-3 , a molecular sieve throttling structure of an oxygen generator, including two molecular sieve cylinders 1 arranged in parallel. Both molecular sieve cylinders 1 are arranged on the cover plate 2. The cover plate 2 is provided with a first air outlet channel 2.1 and a second air outlet channel 2.2 corresponding to the two molecular sieve cylinders 1. A first throttle valve 3 is arranged in the first air outlet channel 2.1, and a second throttle valve 4 is arranged in the second air outlet channel 2.2; it also includes an air outlet cover 5, the air outlet cover 5 is fixed to the cover plate 2, and the air outlet cover 5 has an inner cavity 5.1 and an air pipe joint 5.2 communicated with the inner cavity 5.1; both the first air outlet channel 2.1 and the second air outlet channel 2.2 are communicated with the inner cavity 5.1.

[0021] Among them, both the first air outlet channel 2.1 and the second air outlet channel 2.2 include a throttle valve mounting hole 2.3. A first throttle valve 3 is arranged in the throttle valve mounting hole 2.3 of the first air outlet channel 2.1, and a second throttle valve 4 is arranged in the throttle valve mounting hole 2.3 of the second air outlet channel 2.2. Preferably, the first throttle valve 3, the second throttle valve 4 and the throttle valve mounting hole 2.3 are in interference fit. The first throttle valve 3 and the second throttle valve 4 adopt throttle valves in the prior art and can be directly purchased in the market. The interference fit between the throttle valve and the throttle valve mounting hole 2.3 is beneficial to simplifying the assembly process of the throttle valve. Among them, the first air outlet channel 2.1 and the second air outlet channel 2.2 are the channels for the molecular sieve cylinder 1 to discharge high-concentration oxygen.

[0022] Preferably, a chip-containing ring groove 2.4 is arranged at the inner end of the throttle valve mounting hole 2.3. The chip-containing ring groove 2.4 can prevent the situation that the throttle valve is not properly installed caused by the plastic on the side wall of the throttle valve mounting hole 2.3 being scraped to the bottom of the throttle valve mounting hole 2.3 when the throttle valve is installed in the throttle valve mounting hole 2.3.

[0023] Preferably, a sealing ring 6 is arranged between the air outlet cover 5 and the cover plate 2. Preferably, the cover plate 2 is provided with a groove 2.5 surrounding the first air outlet channel 2.1 and the second air outlet channel 2.2, and the sealing ring 6 is arranged in the groove 2.5. The sealing between the air outlet cover 5 and the cover plate 2 is realized by arranging the sealing ring 6, preventing oxygen from overflowing.

[0024] Preferably, a limiting plate 5.3 is provided on the inner wall of the air outlet cover 5, and the limiting plate 5.3 corresponds to the first throttle valve 3 and the second throttle valve 4. The limiting plate 5.3 helps to prevent the throttle valve from disengaging from the throttle valve mounting hole 2.3.

[0025] The molecular sieve cylinder 1 has fixing holes (not shown), and the cover plate 2 and the air outlet cover 5 also have corresponding fixing holes 7. The air outlet cover 5 is fixed to the cover plate 2 by bolts (an example of fasteners, not shown), and the cover plate 2 is fixed to the molecular sieve cylinder 1. The assembly process is very simple. During installation, the two throttle valves are inserted into the throttle valve mounting holes 2.3, and the sealing ring 6 is installed in the groove 2.5; after the air outlet cover 5 is installed on the cover plate 2, the molecular sieve cylinder 1, the cover plate 2 and the air outlet cover 5 are fixed together by bolts.

[0026] The working principle of the present utility model: When the molecular sieve cylinder 1 on one side discharges oxygen to the first throttle valve 3, the high-pressure oxygen enters the inner cavity 5.1 of the air outlet cover 5. Most of the oxygen is conveyed to the next link (such as a water tank) through the pipe joint 5.2. Part of the oxygen in the inner cavity 5.1 flows into the molecular sieve cylinder 1 on the other side through the second throttle valve 4, and the nitrogen in the molecular sieve cylinder 1 on the other side is discharged by the pressure assistance of the oxygen. The two throttle valves are covered by the air outlet cover 5 to form an inner cavity, and there is no need to externally connect multiple pipelines, making the structure simpler and more compact, and facilitating miniaturized design.

[0027] In another embodiment of the present utility model (not shown), both the first throttle valve 3 and the second throttle valve 4 are throttle holes with a certain aperture provided on the cover plate 2, that is, the independent first and second throttle valves in the above embodiment are cancelled, and the first throttle valve and the second throttle valve are formed during the molding process of the cover plate 2. Or, by changing the apertures of the first air outlet channel 2.1 and the second air outlet channel 2.2, a throttle hole is directly formed, as long as the throttle hole can meet the throttling performance of the molecular sieve cylinder of the oxygen generator.

[0028] The embodiments of the present utility model have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments and the features in the embodiments of the present utility model can be combined with each other. The present utility model is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present utility model, those of ordinary skill in the art can also make many forms without departing from the purpose of the present utility model and the scope protected by the claims. All of these fall within the protection scope of the present utility model.

Claims

1. A molecular sieve throttling structure for an oxygen concentrator, comprising two molecular sieve cartridges (1) arranged in parallel, wherein the two molecular sieve cartridges (1) are both arranged on a cover plate (2), characterized in that: The cover plate (2) is provided with a first gas outlet channel (2.1) and a second gas outlet channel (2.2) corresponding to the two molecular sieve cartridges (1); a first throttle valve (3) is provided in the first gas outlet channel (2.1), and a second throttle valve (4) is provided in the second gas outlet channel (2.2); It also comprises an air outlet cover (5), the air outlet cover (5) being fixed to the cover plate (2), the air outlet cover (5) comprising an inner cavity (5.1) and an air pipe joint (5.2) communicating with the inner cavity (5.1); the first air outlet channel (2.1) and the second air outlet channel (2.2) are both communicating with the inner cavity (5.1).

2. The molecular sieve throttling structure of an oxygen concentrator according to claim 1, characterized in that: The first throttle valve (3) and the second throttle valve (4) are both throttle holes with a certain aperture and arranged on the cover plate (2).

3. The molecular sieve throttling structure of an oxygen concentrator according to claim 1, characterized in that: The first air outlet channel (2.1) and the second air outlet channel (2.2) both comprise a throttle valve mounting hole (2.3); a first throttle valve (3) is arranged in the throttle valve mounting hole (2.3) of the first air outlet channel (2.1); and a second throttle valve (4) is arranged in the throttle valve mounting hole (2.3) of the second air outlet channel (2.2).

4. The molecular sieve throttling structure of an oxygen concentrator according to claim 3, characterized in that: The first throttle valve (3), the second throttle valve (4) and the throttle valve mounting hole (2.3) are interference fit.

5. The molecular sieve throttling structure of an oxygen concentrator according to claim 4, characterized in that: The inner end of the throttle valve mounting hole (2.3) is provided with a chip accommodating ring groove (2.4).

6. The molecular sieve throttling structure of an oxygen concentrator according to claim 1, characterized in that: A sealing ring (6) is provided between the air outlet cover (5) and the cover plate (2).

7. The molecular sieve throttling structure of an oxygen concentrator according to claim 6, characterized in that: The cover plate (2) is provided with a groove (2.5) surrounding the first air outlet channel (2.1) and the second air outlet channel (2.2), and the sealing ring (6) is arranged in the groove (2.5).

8. The molecular sieve throttling structure of an oxygen concentrator according to claim 3, characterized in that: A limit plate (5.3) is provided on the inner wall of the air outlet cover (5), and the limit plate (5.3) is provided corresponding to the first throttle valve (3) and the second throttle valve (4).

9. An oxygen concentrator, characterized in that: It has a molecular sieve throttling structure as described in any one of claims 1 to 8.

Images