An oxygen enrichment machine

Abstract

The utility model provides an oxygen enricher, which belongs to the technical field of oxygen production equipment. It solves the problem of the large overall space occupied by the oxygen enricher in the prior art. The oxygen enricher comprises a casing, wherein a mounting chamber and a partition are arranged at intervals in the front and rear of the casing, a cold dryer is arranged in the mounting chamber, an oil-water separator for oil-gas separation and a precision filter for gas-liquid separation are arranged on the side of the partition away from the mounting chamber, a screw compressor and a nitrogen-oxygen separation membrane for separating nitrogen and oxygen are arranged on the other side of the partition, the precision filter and the nitrogen-oxygen separation membrane are both connected to the partition along the height direction of the casing, the screw compressor and the oil-water separator are connected to the inner bottom wall of the casing, and the screw compressor, the oil-water separator, the cold dryer, the precision filter and the nitrogen-oxygen separation membrane are connected in sequence. The utility model has the advantages of more reasonable overall structural distribution, more compact structure, and more miniaturization as a whole.

Description

Technical Field

[0001] The utility model belongs to the technical field of oxygen production equipment and relates to an oxygen enricher. Background Art

[0002] An oxygen enricher is a type of machine that produces high-oxygen air. Ordinary air is mainly composed of 78% nitrogen and 21% oxygen, while high-oxygen air is a nitrogen-oxygen mixed gas with an oxygen content of more than 21%. It is usually used in oxygen therapy, high-altitude operations, diving and other fields. It can increase the oxygen content in human blood and is beneficial to the health of the body.

[0003] The existing oxygen enricher includes a frame, an air compressor, a molecular sieve connected to the air compressor, and a master control system. The air compressor and the molecular sieve are respectively installed on the frame by bolts. When in use, the master control system controls the air compressor to extract and compress the air, and then transports the compressed air to the molecular sieve for filtering and separating oxygen to finally obtain oxygen. However, the layout of the various components inside the existing oxygen enricher is random, and the various components need to be connected by pipelines, so that the oxygen enricher occupies a large space as a whole, and is also inconvenient to use and maintain. Summary of the invention

[0004] The purpose of the utility model is to solve the above problems in the existing technology and to provide an oxygen enricher. The technical problem to be solved by the utility model is to provide an oxygen enricher with a more reasonable overall structure distribution, a more compact structure and a more miniaturized overall structure.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] An oxygen enricher comprises a casing, characterized in that an installation bin and a partition are arranged at intervals in the front and rear of the casing, a cold dryer is arranged in the installation bin, an oil-water separator for oil and gas separation and a precision filter for gas-liquid separation are arranged on the side of the partition away from the installation bin, a screw compressor and a nitrogen-oxygen separation membrane for separating nitrogen and oxygen are arranged on the other side of the partition, the precision filter and the nitrogen-oxygen separation membrane are both connected to the partition along the height direction of the casing, the screw compressor and the oil-water separator are connected to the inner bottom wall of the casing, and the screw compressor, the oil-water separator, the cold dryer, the precision filter and the nitrogen-oxygen separation membrane are connected in sequence.

[0007] The oxygen enricher adopts a modular design. The cold dryer is independent by setting up an installation bin, and the screw compressor of the intake module, the oil-water separator and precision filter of the purification module, the nitrogen and oxygen separation membrane of the separation module, and the temperature control module cold dryer are arranged in different areas in the casing by setting partitions. At the same time, the partition can also be used as a mounting plate, that is, the precision filter and the nitrogen and oxygen separation membrane are hung on the partition, so that the overall structural distribution of the oxygen enricher is more reasonable and the structure is more compact. After the partition and module layout, the pipeline connection path is shorter and more regular, the overall design is more miniaturized, and it is more convenient to use and maintain.

[0008] In the above-mentioned oxygen enricher, the gas outlet of the nitrogen-oxygen separation membrane is connected to an oxygen concentration dilution transparent tube, which is connected to the inner wall of the casing along the height direction of the casing, and an oxygen concentration neutralization filter element is arranged between the oxygen concentration dilution transparent tube and the nitrogen-oxygen separation membrane. The oxygen-rich gas separated by the nitrogen-oxygen separation membrane is filtered by the oxygen concentration neutralization filter element and then enters the oxygen concentration dilution transparent tube to wait for the oxygen concentration detection, so as to obtain oxygen-rich gas with accurate oxygen concentration.

[0009] In the above oxygen enricher, a heating rod is also provided on the partition plate on the same side as the nitrogen-oxygen separation membrane, and the two ends of the heating rod are respectively connected to the precision filter and the nitrogen-oxygen separation membrane. The heating rod can heat the gas entering the nitrogen-oxygen separation membrane, increase the diffusion rate of the gas, thereby improving the separation effect of the nitrogen-oxygen separation membrane, and further ensuring the reliability of the nitrogen-oxygen separation membrane.

[0010] In the above-mentioned oxygen enricher, a temperature detector is provided on the heating rod, an oxygen content sensor and an exhaust valve are provided at the outlet of the oxygen concentration dilution transparent tube in sequence, and a controller electrically connected to the temperature detector, the oxygen content sensor and the exhaust valve is provided on the casing, and the controller is used to control the start and stop of the heating rod according to the transmission signal of the temperature detector and to control the switch of the exhaust valve according to the transmission signal of the oxygen content sensor. The temperature detector can monitor the heating temperature of the heating rod so that the heating temperature of the heating rod is controlled within a preset optimal range. The oxygen content sensor can detect the oxygen concentration in the oxygen concentration dilution transparent tube in real time. Through the cooperation of the controller and the exhaust valve, only when the oxygen concentration in the oxygen concentration dilution transparent tube reaches the set threshold can it be exhausted into the gas storage barrel, thereby ensuring the accuracy of the oxygen concentration of the obtained oxygen-enriched gas, and at the same time, it is also convenient to obtain oxygen-enriched gas with different oxygen concentrations.

[0011] In the above oxygen enricher, an air cooler is provided on the inner top wall of the housing, and a plurality of heat dissipation holes are provided on the top and side of the housing. The air cooler can reduce the temperature of the oil-water separator, precision filter and oil cooling filter in the housing and the purification module to prevent the oil-water separator, precision filter and oil cooling filter from being damaged by excessive temperature.

[0012] In the above oxygen enricher, an oil cooling filter is also provided on the inner top wall of the casing, which is opposite to the oil-water separator, and the two ends of the oil cooling filter are respectively connected to the screw compressor and the oil-water separator. The oil cooling filter can filter and purify the gaseous oil separated by the oil-water separator and then transport it to the oil injection port of the screw compressor for the next recycling.

[0013] In the above-mentioned oxygen enricher, a drain bucket is provided outside the casing, and a nitrogen discharge device for liquefying nitrogen is provided inside the casing. The nitrogen discharge device is arranged adjacent to the drain bucket, and the nitrogen discharge device is connected to the nitrogen discharge port of the nitrogen-oxygen separation membrane and the drain bucket, respectively. The nitrogen separated by the nitrogen-oxygen separation membrane can be processed by the nitrogen discharge device in time, and discharged into the drain bucket after processing, so as to avoid the separated nitrogen being discharged outside the casing and then being re-absorbed into the screw compressor, thereby increasing the workload of the oxygen enricher.

[0014] In the above oxygen enricher, the four corners of the bottom of the housing are provided with spacers. The spacers raise the components in the housing as a whole, so that the height of the nitrogen exhaust device and the sewage tank are roughly the same, so that the housing does not need to have a avoidance hole, which is conducive to the nitrogen exhaust device to discharge the liquefied nitrogen into the sewage tank.

[0015] In the above oxygen enricher, the air inlet of the screw compressor is provided with an air inlet filter, which can perform a rough filtration (i.e. dust removal filtration) on the standard atmosphere before it enters the screw compressor for compression, which is beneficial to the next operation.

[0016] In the above-mentioned oxygen enricher, both sides of the housing are open and detachably provided with covers, and sound insulation cotton is provided on the inner side wall of the cover. The detachable cover cooperates with the air intake module, purification module, temperature control module and separation module arranged in different areas to protect each module in the housing, and quickly troubleshoots the fault when the oxygen enricher fails, thereby reducing the troubleshooting time; the sound insulation cotton can reduce the noise generated when the oxygen enricher is running.

[0017] Compared with the prior art, the advantages of the oxygen enricher are: the oxygen enricher adopts a modular design, and the cold dryer is independent by setting an installation bin, and the screw compressor of the intake module, the oil-water separator and precision filter of the purification module, the nitrogen and oxygen separation membrane of the separation module, and the air cooler, cold dryer and heating rod of the temperature control module are arranged in the casing in different areas by setting partitions. At the same time, the air cooler is arranged on the inner top wall of the casing to make full use of the space in the casing. On the first hand, the overall structural distribution of the oxygen enricher is more reasonable, the structure is more compact, and the overall size is more miniaturized. On the second hand, covers are detachably provided on both sides of the casing to protect the modules in the casing, quickly troubleshoot, and make the maintenance of each module more convenient. On the third hand, integrated detection and monitoring are carried out by setting a controller and a monitoring module including a temperature detector and an oxygen content sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of this oxygen enricher.

[0019] Figure 2 This is one of the three-dimensional structural diagrams of the oxygen enricher after a part of the casing is removed.

[0020] Figure 3 This is the second schematic diagram of the three-dimensional structure of the oxygen enricher after a part of the casing is removed.

[0021] Figure 4 This is the third schematic diagram of the three-dimensional structure of the oxygen enricher after a part of the casing is removed.

[0022] Figure 5 This is the fourth schematic diagram of the three-dimensional structure of the oxygen enricher after a part of the casing is removed.

[0023] In the figure, 1. casing; 1a. heat dissipation hole; 2. installation compartment; 3. partition; 4. cold dryer; 5. oil-water separator; 6. precision filter; 7. screw compressor; 8. nitrogen oxygen separation membrane; 8a. gas outlet; 8b. nitrogen exhaust port; 9. oxygen concentration dilution transparent tube; 10. oxygen concentration neutralization filter element; 11. heating rod; 12. temperature detector; 13. oxygen content sensor; 14. controller; 15. air cooler; 16. oil cooling filter; 17. sewage barrel; 18. nitrogen exhaust equipment; 19. air intake filter; 20. cover plate; 21. pad block; 22. inverter. DETAILED DESCRIPTION

[0024] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0025] An oxygen enrichment machine, referring to Figure 1-5 , including a casing 1, in which a mounting chamber 2 and a partition 3 are arranged at intervals in the front and rear of the casing 1, a cold dryer 4 is arranged in the mounting chamber 2, an oil-water separator 5 for oil-gas separation and a precision filter 6 for gas-liquid separation are arranged on the side of the partition 3 away from the mounting chamber 2, a screw compressor 7 and a nitrogen-oxygen separation membrane 8 for separating nitrogen and oxygen are arranged on the other side of the partition 3, the precision filter 6 and the nitrogen-oxygen separation membrane 8 are both connected to the partition 3 along the height direction of the casing 1, the screw compressor 7 and the oil-water separator 5 are connected to the inner bottom wall of the casing 1, and the screw compressor 7, the oil-water separator 5, the cold dryer 4, the precision filter 6 and the nitrogen-oxygen separation membrane 8 are connected in sequence.

[0026] Further, refer to Figure 1-5, an oxygen concentration dilution transparent tube 9 is connected to the gas outlet 8a of the nitrogen and oxygen separation membrane 8, and the oxygen concentration dilution transparent tube 9 is connected to the inner wall of the casing 1 along the height direction of the casing 1, and an oxygen concentration neutralization filter element 10 is arranged between the oxygen concentration dilution transparent tube 9 and the nitrogen and oxygen separation membrane 8; a heating rod 11 is also arranged on the partition 3 on the same side as the nitrogen and oxygen separation membrane 8, and the two ends of the heating rod 11 are respectively connected to the precision filter 6 and the nitrogen and oxygen separation membrane 8; an air cooler 15 is arranged on the inner top wall of the casing 1, and a plurality of heat dissipation holes 1a are respectively arranged on the top and side of the casing 1; an oil cooling filter 16 is also arranged on the inner top wall of the casing 1, which is opposite to the oil-water separator 5 up and down, and the two ends of the oil cooling filter 16 are respectively connected to the screw compressor 7 and the oil-water separator 5.

[0027] Furthermore, refer to Figure 1-5 A temperature detector 12 is provided on the heating rod 11, an oxygen content sensor 13 and an exhaust valve are provided at the outlet of the oxygen concentration dilution transparent tube 9 in sequence, and a controller 14 is provided on the housing 1, which is electrically connected to the temperature detector 12, the oxygen content sensor 13 and the exhaust valve respectively. The controller 14 is used to control the start and stop of the heating rod 11 according to the transmission signal of the temperature detector 12 and to control the switch of the exhaust valve according to the transmission signal of the oxygen content sensor 13.

[0028] In this embodiment, the air inlet of the screw compressor 7 is preferably provided with an air inlet filter 19; the two sides of the casing 1 are open and detachably provided with cover plates 20, and the inner side walls of the cover plates 20 are provided with sound insulation cotton; the four corners of the bottom of the casing 1 are provided with padding blocks 21; a sewage barrel 17 is provided outside the casing 1, and a nitrogen discharge device 18 for nitrogen liquefaction is provided inside the casing 1, and the nitrogen discharge device 18 is arranged adjacent to the sewage barrel 17, and the nitrogen discharge device 18 is respectively connected to the nitrogen discharge port 8b of the nitrogen-oxygen separation membrane 8 and the sewage barrel 17.

[0029] The following describes the working principle of this oxygen enricher:

[0030] When in use, the oxygen enricher continuously inhales standard atmosphere (ambient air), which is first roughly filtered (i.e., dust removal filtration) by the air intake filter 19 and then enters the screw compressor 7 for compression. The compressed gas is transported to the oil-water separator 5 through the connecting pipe for oil-gas separation (i.e., oil removal filtration), and the oil cooling filter 16 can filter and purify the gaseous oil separated by the oil-water separator 5 and then transport it to the oil injection port of the screw compressor 7 for the next recycling. The deoiled gas is transported to the cold dryer 4 through the connecting pipe for cooling and dehumidification, and then the cooled gas is transported to the precision filter 6 through the connecting pipe for gas-liquid separation (i.e., water removal filtration), and then the separated gas is transported to the heating rod 11 through the connecting pipe for heating. The heating rod 11 can heat the gas entering the nitrogen-oxygen separation membrane 8, thereby increasing the diffusion rate of the gas and thus improving the separation efficiency of the nitrogen-oxygen separation membrane 8. The heated gas is transported to the nitrogen-oxygen separation membrane 8 for separation of nitrogen and oxygen, and the separated nitrogen is discharged to the nitrogen discharge equipment 18 through the nitrogen discharge port 8b for liquefaction treatment. The liquefied nitrogen is transported to the sewage barrel 17 through the connecting pipe, and the oxygen-rich gas in the nitrogen-oxygen separation membrane 8 is transported to the oxygen concentration dilution transparent tube 9 through the gas outlet 8a. The oxygen-rich gas is further filtered and purified by the oxygen concentration neutralization filter element 10 before entering the oxygen concentration dilution transparent tube 9. When the oxygen concentration in the oxygen concentration dilution transparent tube 9 reaches the set threshold value detected by the oxygen content sensor 13 thereon, the controller 14 controls the exhaust valve at the outlet of the oxygen concentration dilution transparent tube 9 to open, so that the oxygen-rich gas is transported to the gas storage barrel through the connecting pipe, and finally compressed by the booster compressor and filled into the required equipment from the canning valve (the gas storage barrel, the booster compressor, the canning valve and the required equipment are not shown in the figure).

[0031] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An oxygen enricher, comprising a housing (1), characterized in that: A partition (3) and an installation chamber (2) are arranged at intervals in front and back of the casing (1); a cold dryer (4) is arranged in the installation chamber (2); an oil-water separator (5) for oil-gas separation and a precision filter (6) for gas-liquid separation are arranged on one side of the partition (3) close to the installation chamber (2); a screw compressor (7) and a nitrogen-oxygen separation membrane (8) for separating nitrogen and oxygen are arranged on the other side of the partition (3); the precision filter (6) and the nitrogen-oxygen separation membrane (8) are both connected to the partition (3) along the height direction of the casing (1); the screw compressor (7) and the oil-water separator (5) are connected to the inner bottom wall of the casing (1); and the screw compressor (7), the oil-water separator (5), the cold dryer (4), the precision filter (6) and the nitrogen-oxygen separation membrane (8) are connected in sequence.

2. An oxygen enricher according to claim 1, characterized in that: An oxygen concentration dilution transparent tube (9) is connected to the gas outlet of the nitrogen-oxygen separation membrane (8); the oxygen concentration dilution transparent tube (9) is connected to the inner wall of the casing (1) along the height direction of the casing (1); and an oxygen concentration neutralization filter element (10) is arranged between the oxygen concentration dilution transparent tube (9) and the nitrogen-oxygen separation membrane (8).

3. An oxygen enricher according to claim 2, characterized in that: The partition plate (3) is also provided with a heating rod (11) on the same side as the nitrogen-oxygen separation membrane (8), and the two ends of the heating rod (11) are respectively connected to the precision filter (6) and the nitrogen-oxygen separation membrane (8).

4. An oxygen enricher according to claim 3, characterized in that: The heating rod (11) is provided with a temperature detector (12); an oxygen content sensor (13) and an exhaust valve are sequentially provided at the outlet of the oxygen concentration dilution transparent tube (9); the housing (1) is provided with a controller (14) which is electrically connected to the temperature detector (12), the oxygen content sensor (13) and the exhaust valve, respectively; the controller (14) is used to control the start and stop of the heating rod (11) according to the transmission signal of the temperature detector (12) and to control the opening and closing of the exhaust valve according to the transmission signal of the oxygen content sensor (13).

5. An oxygen enricher according to claim 1, characterized in that: An air cooler (15) is provided on the inner top wall of the casing (1), and a plurality of heat dissipation holes (1a) are respectively provided on the top and the side of the casing (1).

6. An oxygen enricher according to claim 1, characterized in that: An oil cooling filter (16) is also provided on the inner top wall of the casing (1) and is located opposite to the oil-water separator (5) in the upper and lower directions. The two ends of the oil cooling filter (16) are respectively connected to the screw compressor (7) and the oil-water separator (5).

7. An oxygen enricher according to any one of claims 1 to 6, characterized in that: A sewage discharge barrel (17) is arranged outside the casing (1), and a nitrogen discharge device (18) for liquefying nitrogen is arranged inside the casing (1). The nitrogen discharge device (18) is arranged adjacent to the sewage discharge barrel (17), and the nitrogen discharge device (18) is respectively connected to the nitrogen discharge port (8b) of the nitrogen-oxygen separation membrane (8) and the sewage discharge barrel (17).

8. An oxygen enricher according to claim 7, characterized in that: The four corners of the bottom of the casing (1) are provided with padding blocks (21).

9. An oxygen enricher according to any one of claims 1 to 6, characterized in that: The air inlet of the screw compressor (7) is provided with an air inlet filter (19).

10. An oxygen enricher according to any one of claims 1 to 5, characterized in that: Both sides of the casing (1) are open and are respectively provided with detachable cover plates (20), and sound insulation cotton is provided on the inner side wall of the cover plate (20).

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