Oxygen generator

Abstract

The utility model discloses an oxygen generator which comprises a rear shell and a compressor cover, a compressor bin is formed between the compressor cover and the rear shell, and a compressor is located in the compressor bin; the compressor cover is provided with a nitrogen discharging bin and an air inlet buffering bin. The nitrogen discharging bin communicates with the compressor bin through a plurality of through holes. The air inlet buffering bin is communicated with an air inlet of the compressor through a guide pipe. According to the utility model, the nitrogen discharging bin and the air inlet buffering bin are integrated on the compressor cover, so that the small-sized design of the oxygenerator is facilitated, the assembly process is reduced, and the nitrogen discharging noise and the air flow pulse noise are particularly reduced.

Description

Technical Field

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

[0002] Currently, the widely used oxygen generators all adopt the principle of pressure swing adsorption. This principle is based on the fact that molecular sieves have a strong adsorption capacity for nitrogen, so as to separate nitrogen from the air to obtain an air flow with a high oxygen concentration.

[0003] The main structures of the oxygen generator include structures such as a fan, a compressor, and molecular sieves. In the design of miniaturizing the oxygen generator, not only should each main structure be reasonably arranged in a smaller housing, but also noise control needs to be fully considered.

[0004] When the compressor is running, due to the reciprocating motion of the compressor piston, a large airflow pulsation noise will be generated in the compressor inlet pipe; when the nitrogen in the molecular sieve is discharged, a large airflow noise will also be generated. For the airflow pulsation noise, the existing solution is to place a compressor inlet buffer device before the compressor intake. Through this buffer device, the airflow pulsation noise of the compressor intake can be better reduced; for the nitrogen discharge noise, the existing solution also designs a corresponding nitrogen discharge muffling device to reduce the nitrogen discharge noise. However, the above-mentioned intake buffer device and nitrogen discharge muffling device are mostly independent structural components inside the compressor, occupying a relatively large space inside the oxygen generator. Therefore, how to achieve a better balance between noise suppression and miniaturization is the key point and difficulty in the design of the oxygen generator. Summary of the Utility Model

[0005] In order to overcome the problems existing in the prior art, the utility model provides an oxygen generator, and the specific technical solution is as follows.

[0006] An oxygen generator, including a rear shell, characterized in that it further includes a compressor cover. A compressor chamber is formed between the compressor cover and the rear shell, and the compressor is located in the compressor chamber;

[0007] The compressor cover is provided with a nitrogen discharge chamber and an intake buffer chamber. The nitrogen discharge chamber is communicated with the compressor chamber through a plurality of through holes; the intake buffer chamber is communicated with the intake port of the compressor through a conduit.

[0008] When the oxygen generator operates to the nitrogen discharge cycle, the high-pressure nitrogen in the molecular sieve enters the inner cavity of the nitrogen discharge bin from the nitrogen discharge pipe. The inner cavity of the nitrogen discharge bin is a cavity with a certain volume, which buffers and decompresses the nitrogen, reduces the air flow velocity, and achieves the effect of reducing the nitrogen discharge noise. The nitrogen in the inner cavity of the nitrogen discharge bin is then discharged into the compressor installation space (compressor bin) through several through holes and is discharged to the outside of the oxygen generator together with the air used to cool the compressor. By integrating the nitrogen discharge bin onto the compressor cover, it not only facilitates the miniaturized design of the oxygen generator and reduces the assembly process, but also is particularly beneficial for reducing the nitrogen discharge noise. The air in the oxygen generator environment enters the intake buffer bin after being filtered. This intake buffer bin can effectively reduce the air flow pulse noise of the compressor intake. By integrating the intake buffer bin onto the compressor cover, it not only facilitates the miniaturized design of the oxygen generator and reduces the assembly process, but also is particularly beneficial for reducing the air flow pulse noise.

[0009] Further, the nitrogen discharge bin and the intake buffer bin are horizontally arranged side by side on the top of the compressor cover. This is beneficial for avoiding the nitrogen discharge bin and the intake buffer bin occupying too much space of the compressor.

[0010] Further, it also includes a top cover and a front shell. The top cover is fixed between the front shell and the rear shell, and an air inlet is provided on the top cover; a fan is provided on the top of the compressor bin; an air outlet is provided at the bottom of the rear shell. The air in the oxygen generator environment enters the space between the top cover and the compressor bin through the air inlet, and then the fan blows air into the compressor bin to take away the heat generated during the operation of the compressor. The air in the compressor bin is discharged to the outside of the oxygen generator through the air outlet at the lower end of the rear shell. By adopting the method of top air inlet and bottom air outlet, compared with the prior art method of bottom air inlet and bottom air outlet, the air flow path is shortened, which is beneficial for reducing the volume of the oxygen generator. At the same time, the high-concentration nitrogen in the nitrogen discharge bin is also discharged with the heat dissipation air, further enhancing the heat dissipation effect of the compressor; at the same time, the nitrogen is quickly diffused to prevent it from being sucked into the air inlet of the oxygen generator and affecting the oxygen generation efficiency of the oxygen generator.

[0011] Further, an arc-shaped guiding surface is provided at the bottom of the compressor cover, and the arc-shaped guiding surface corresponds to the air outlet and is used to guide the heat dissipation air towards the air outlet.

[0012] Further, a guiding plate is provided on the arc-shaped guiding surface. The guiding plate is vertically arranged and the end of the guiding plate faces the air outlet. Preferably, a plurality of guiding plates are arranged in parallel at intervals.

[0013] Further, a fan bearing plate is provided on the rear shell. A part of the fan is supported on the fan bearing plate, and a part of the fan is supported on the top of the compressor cover.

[0014] Further, a negative ion generator is also provided at the lower part of the compressor cover, and the negative ion generating head of the negative ion generator is located between the arc-shaped guiding surface and the air outlet.

[0015] Further, a buckle structure is also provided at the top of the compressor cover, and the base of the fan is snapped into the buckle structure.

[0016] Further, the distribution valve, the circuit board, and the air intake filtering device are all located between the top cover and the compressor chamber. The main small components except the compressor and the molecular sieve cylinder are arranged below the top cover, which is beneficial to improving the integration degree of the oxygen generator and reducing its volume.

[0017] Compared with the prior art, the present utility model integrates the nitrogen discharge chamber and the air intake buffer chamber onto the compressor cover, which is not only beneficial to the miniaturized design of the oxygen generator and reduces the assembly process, but also particularly beneficial to reducing the nitrogen discharge noise and the air flow pulse noise. The arc-shaped guiding surface of the present utility model smoothly guides the air flow (heat dissipation air flow) blown out by the upper fan into a horizontal direction and blows it out from the air outlet, improving the discharge efficiency of the heat dissipation air flow; there are vertical guiding plates on the arc-shaped guiding surface, and the guiding plates can guide the disordered air flow guided into the horizontal direction into a relatively orderly air flow, further improving the discharge efficiency of the heat dissipation air flow; in addition, the fan installation and positioning structure of the present utility model is simple, and the disassembly and assembly are very convenient. Description of the Drawings

[0018] Figure 1 is a perspective view of the oxygen generator of the present utility model;

[0019] Figure 2 is a schematic diagram of the oxygen generator of the present utility model after removing the front shell;

[0020] Figure 3 is a schematic cross-sectional view (rendering) of the oxygen generator of the present utility model;

[0021] Figure 4 is a schematic cross-sectional view (line drawing) of the oxygen generator of the present utility model;

[0022] Figure 5 is a schematic diagram of the rear shell;

[0023] Figure 6 is a schematic diagram of the compressor cover (observed from the front to the back);

[0024] Figure 7 is a schematic diagram of the compressor cover (observed from the back to the front).

[0025] In the figure: front shell 1, rear shell 2, molecular sieve cylinder 3, compressor 4, compressor cover 5, compressor chamber 6, top cover 7, conduit 8, fan 9, air outlet 10, fan carrier plate 11, distribution valve 12, circuit board 13, intake air filtering device 14, nitrogen discharge pipe 15, negative ion generator 16, left side limit plate 2.1, right side limit plate 2.2, nitrogen discharge chamber 5.1, through holes 5.2, intake air buffer chamber 5.3, arc-shaped guide surface 5.4, guide plate 5.5, air inlet 7.1, negative ion generating head 16.1. Detailed implementation mode

[0026] The present utility model will be further described in detail below with reference to the accompanying drawings.

[0027] See Figures 1-7 , an oxygen generator, which includes a front shell 1, a rear shell 2, a molecular sieve cylinder 3, a compressor 4, a compressor cover 5, and a top cover 7. The compressor cover 5 is located between the front shell 1 and the rear shell 2. A compressor chamber 6 is formed between the compressor cover 5 and the rear shell 2. The compressor 4 is located in the compressor chamber 6. The top cover 7 is fixed between the front shell 1 and the rear shell 2. Two molecular sieve cylinders 3 arranged side by side in the front-rear direction are located between the compressor cover 5 and the rear shell 2, and the molecular sieve cylinder 3 is located outside the compressor chamber 6. The front-rear direction in this embodiment refers to the front-rear direction when the oxygen generator is in use.

[0028] As Figure 2 , Figure 6 , Figure 7 shown, the compressor cover 5 has a nitrogen discharge chamber 5.1, and the nitrogen discharge chamber 5.1 is communicated with the compressor chamber 6 through a plurality of through holes 5.2. When the oxygen generator runs to the nitrogen discharge cycle, the high-pressure nitrogen in the molecular sieve enters the inner cavity of the nitrogen discharge chamber 5.1 from the nitrogen discharge pipe 19. The inner cavity of the nitrogen discharge chamber 5.1 is a cavity with a certain volume, which buffers and decompresses the nitrogen, reduces the air flow velocity, and achieves the effect of reducing the nitrogen discharge noise. The nitrogen in the inner cavity of the nitrogen discharge chamber 5.1 is then discharged into the installation space (compressor chamber 6) of the compressor 4 through a plurality of through holes 5.2, and is discharged to the outside of the oxygen generator together with the air used to cool the compressor 4. By integrating the nitrogen discharge chamber 5.1 onto the compressor cover 5, it is not only beneficial to the miniaturized design of the oxygen generator, reduces the assembly process, but also particularly beneficial to reducing the nitrogen discharge noise.

[0029] The compressor cover 5 also has an intake air buffer chamber 5.3, and the intake air buffer chamber 5.3 is communicated with the intake port (not shown) of the compressor 4 through a conduit 8. The air in the environment of the oxygen generator enters the intake air buffer chamber 5.3 after being filtered. The intake air buffer chamber 5.3 can better reduce the air flow pulse noise of the intake of the compressor 4. By integrating the intake air buffer chamber 5.3 onto the compressor cover 5, it is not only beneficial to the miniaturized design of the oxygen generator, reduces the assembly process, but also particularly beneficial to reducing the air flow pulse noise.

[0030] As Figure 1, Figure 2 As shown in the figure, an air inlet 7.1 is provided on the top cover 7; a fan 9 is provided on the top of the compressor chamber 6; an air outlet 10 is provided at the bottom of the rear shell 2. The air in the oxygen generator environment enters the space between the top cover 7 and the compressor chamber 6 through the air inlet 7.1, and then the fan 9 blows air into the compressor chamber 6 to take away the heat generated when the compressor 4 works. The air in the compressor chamber 6 is discharged to the outside of the oxygen generator through the air outlet 10 at the lower end of the rear shell 2. By adopting the top air inlet and bottom air outlet method, compared with the prior art of lower air inlet and lower air outlet, the air flow path is shortened, which is beneficial to reducing the volume of the oxygen generator. At the same time, the high-concentration nitrogen in the nitrogen discharge chamber 5.1 is also discharged with the cooling air, further enhancing the heat dissipation effect of the compressor; at the same time, the nitrogen is quickly diffused to prevent it from being sucked into the air inlet of the oxygen generator and affecting the oxygen generation efficiency of the oxygen generator.

[0031] Preferably, the nitrogen discharge chamber 5.1 and the intake buffer chamber 5.3 are horizontally arranged side by side on the top of the compressor cover 5. This is beneficial to avoiding the nitrogen discharge chamber 5.1 and the intake buffer chamber 5.3 occupying too much space of the compressor 4.

[0032] As Figure 2 , Figure 3 As shown in the figure, the distribution valve 12, the circuit board 13, and the intake air filtering device 14 are all located between the top cover 7 and the compressor chamber 6. Except for the compressor 4 and the molecular sieve cylinder 3, the main small components are all arranged below the top cover 7, which is beneficial to improving the integration of the oxygen generator and reducing its volume. The distribution valve 12 is used to alternately supply compressed air to the two molecular sieve cylinders 3 and discharge nitrogen; the circuit board 13 is used to control and set the entire oxygen generator; the intake air filtering device 14 filters the air outside the oxygen generator and inputs it into the intake buffer chamber 5.3.

[0033] As shown in the figure Figure 3 , Figure 4 , Figure 7 As shown in the figure, an arc-shaped guiding surface 5.4 is provided at the bottom of the compressor cover 5. The arc-shaped guiding surface 5.4 corresponds to the air outlet 10 and is used to guide the cooling air to the air outlet 10. The fan 9 blows air into the compressor chamber 6 from above to form cooling air. The cooling air flows from top to bottom to take away the heat of the compressor 3, and the cooling air is guided by the arc-shaped guiding surface 5.4 to a substantially horizontal flow direction and then discharged to the outside of the oxygen generator through the air outlet 10.

[0034] In a preferred embodiment, a guide plate 5.5 is provided on the arc-shaped guide surface 5.4. The guide plate 5.5 is vertically arranged and the end of the guide plate 5.5 faces the air outlet 10; a plurality of guide plates 5.5 are arranged in parallel at intervals. The cooling air blown down from above forms a more turbulent airflow with a higher temperature after passing through the compressor 4 and the arc-shaped guide surface 5.4. Turbulence will reduce the efficiency of the airflow discharged from the air outlet 10. The guide plate 5.5 can guide the turbulence into an airflow aligned with the direction of the air outlet 10, reducing the length of the airflow turbulence and facilitating the improvement of the heat dissipation efficiency.

[0035] Preferably, the arc-shaped guide surface 5.4, the guide plate 5.5 and the compressor cover 5 are integrally formed, which is conducive to reducing the number of components and facilitating the rapid assembly of the oxygen generator.

[0036] Furthermore, as Figure 2 , Figure 4 shown, a negative ion generator 16 is also provided inside the oxygen generator. The negative ion generating head 16.1 of the negative ion generator 16 is located between the arc-shaped guide surface 5.4 and the air outlet 10. The negative ion generator 16 can be mounted on the compressor cover 5. The negative ion generating head 16.1 of the negative ion generator 16 penetrates from outside the compressor chamber 6 into the compressor chamber 6, and the negative ion generating head 16.1 can pass through the arc-shaped guide surface 5 and be fixed. The negative ion generating head 16.1 carries static charges, which can increase the content of negative oxygen ions in the air and improve the air quality within a certain range. Installing the negative ion generating head 16.1 between the arc-shaped guide surface 5.4 and the air outlet 10 is conducive to timely removing the dust adsorbed by the negative ion generating head 51 through the cooling airflow, thereby extending the service life of the negative ion generator 5.

[0037] When the oxygen generator is in use, the air outlet 10 is arranged at the bottom of the rear shell 2, so that the hollow structure or grid structure of the air outlet 10 is distributed substantially in a vertical plane. The arc-shaped guide surface 5.4 and the guide plate 5.5 guide the cooling air to be substantially in a horizontal direction towards the air outlet 10, which is conducive to discharging the cooling air from the air outlet 10 out of the oxygen generator as much as possible.

[0038] To simplify the installation and disassembly of the fan 9, a fan bearing plate 11 is provided on the rear shell 2. A part of the fan 9 is supported on the fan bearing plate 11, and a part of the fan 9 is supported on the top of the compressor cover 5; preferably, a left limit plate 2.1 and a right limit plate 2.2 are also provided on the rear shell 2, and the fan 9 is positioned by the left limit plate 2.1 and the right limit plate 2.2; a buckle structure (not shown) is also provided on the top of the compressor cover 5, and the base of the fan 9 is snapped into the buckle structure. With such an installation structure for the fan 9, when installing the fan 9, it only needs to be clamped and positioned between the rear shell 2 and the compressor cover 5.

[0039] The embodiments of the present utility model have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments and 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 rather than 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. An oxygen concentrator, comprising a rear housing (2), characterized in that: It also includes a compressor cover (5), a compressor compartment (6) is formed between the compressor cover (5) and the rear shell (2), and the compressor (4) is located in the compressor compartment (6); The compressor cover (5) is provided with a nitrogen exhaust bin (5.1) and an air intake buffer bin (5.3); the nitrogen exhaust bin (5.1) is connected to the compressor bin (6) through a plurality of through holes (5.2); and the air intake buffer bin (5.3) is connected to the air intake of the compressor (4) through a conduit (8).

2. An oxygen concentrator according to claim 1, characterized in that: The nitrogen exhaust bin (5.1) and the air intake buffer bin (5.3) are arranged horizontally in parallel and distributed on the top of the compressor cover (5).

3. An oxygen concentrator according to claim 1, characterized in that: It also includes a top cover (7) and a front shell (1), wherein the top cover (7) is fixed between the front shell (1) and the rear shell (2), and an air inlet (7.1) is provided on the top cover (7); a fan (9) is provided on the top of the compressor compartment (6); and an air outlet (10) is provided on the bottom of the rear shell (2).

4. An oxygen concentrator according to claim 3, characterized in that: The bottom of the compressor cover (5) is provided with an arc-shaped guide surface (5.4), the arc-shaped guide surface (5.4) is provided corresponding to the air outlet (10), and the arc-shaped guide surface (5.4) is used to guide the heat dissipation air toward the air outlet (10).

5. An oxygen concentrator according to claim 4, characterized in that: A guide plate (5.5) is provided on the arc-shaped guide surface (5.4); the guide plate (5.5) is vertically arranged and the end of the guide plate (5.5) faces the air outlet (10).

6. An oxygen concentrator according to claim 5, characterized in that: A plurality of guide plates (5.5) are arranged in parallel and at intervals.

7. An oxygen concentrator according to claim 1, characterized in that: A fan bearing plate (11) is provided on the rear shell (2), a part of the fan (9) is supported on the fan bearing plate (11), and a part of the fan (9) is supported on the top of the compressor cover (5).

8. An oxygen concentrator according to claim 4, characterized in that: A negative ion generator (16) is also provided at the lower part of the compressor cover (5), and a negative ion generating head (16.1) of the negative ion generator (16) is located between the arc-shaped guide surface (5.4) and the air outlet (10).

9. An oxygen concentrator according to claim 8, characterized in that: The top of the compressor cover (5) is also provided with a snap-fit ​​structure, and the base of the fan (9) is snapped into the snap-fit ​​structure.

10. An oxygen concentrator according to claim 3, characterized in that: The distribution valve (12), the circuit board (13), and the air intake filter device (14) are all located between the top cover (7) and the compressor compartment (6).

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