CN211366956U - Molecular sieve adsorber and micro oxygen generator containing same - Google Patents
Molecular sieve adsorber and micro oxygen generator containing same Download PDFInfo
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- CN211366956U CN211366956U CN201921996873.7U CN201921996873U CN211366956U CN 211366956 U CN211366956 U CN 211366956U CN 201921996873 U CN201921996873 U CN 201921996873U CN 211366956 U CN211366956 U CN 211366956U
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Abstract
The utility model provides a molecular sieve adsorber and a micro oxygenerator containing the molecular sieve adsorber, wherein the molecular sieve adsorber comprises a cylinder and two molecular sieve towers, the two molecular sieve towers are arranged in the cylinder, and an oxygen storage cavity is formed between the outer side wall of the molecular sieve tower and the inner side wall of the cylinder; the oxygen storage cavity is communicated with the two molecular sieve towers through one-way valves respectively; the upper end opening and the lower end opening of the cylinder body are respectively and fixedly provided with a top cover and a bottom cover, the top cover is provided with a first air inlet and a second air inlet which are respectively connected with the two molecular sieve towers, and the top end of the top cover is provided with an electromagnetic valve for controlling the first air inlet and the second air inlet to be opened and closed. The utility model discloses place the barrel inside in two molecular sieve towers in inside, constitute by the cavity between them and store up the oxygen chamber and be used for oxygen to store to integrated solenoid valve, check valve are connected, thereby the holistic volume of molecular sieve adsorber and weight that have significantly reduced.
Description
Technical Field
The utility model belongs to the technical field of molecular sieve pressure swing adsorption oxygen generation, in particular to molecular sieve adsorber and contain miniature oxygenerator of this molecular sieve adsorber.
Background
Oxygen has extremely important influence on human bodies, however, short-term acute hypoxia or long-term chronic hypoxia occurs in external environments of human bodies due to factors such as elevation and space sealing, and damage to human health is brought to different degrees. The oxygen inhalation can play roles in eliminating fatigue, enhancing memory, improving body immunity and the like, so in recent years, oxygen health care can rapidly enter the public life. The production of the micro oxygen generator for oxygen health care by applying the molecular sieve pressure swing adsorption oxygen generation technology starts in the 70 th century, and the micro oxygen generator is greatly developed through the technical progress and market development in the last decades.
The molecular sieve pressure swing adsorption oxygen production technology applies the pressure swing adsorption principle and utilizes the characteristic that the molecular sieve has different adsorption capacities on oxygen and nitrogen in the air under certain pressure to carry out selective adsorption. When the molecular sieve is pressurized, the molecular sieve preferentially adsorbs nitrogen in the air, and oxygen is separated out and collected in an oxygen storage tank to be used as product oxygen. When the molecular sieve is decompressed, the adsorbed nitrogen is released from the molecular sieve to be regenerated, thereby realizing the separation of nitrogen and oxygen in the air and preparing oxygen.
The molecular sieve oxygen generator is based on the pressure swing adsorption technical principle, at present, most molecular sieve oxygen generators in the market adopt Skrastrom circulation, namely a two-tower process, and is characterized in that one tower is used for pressurizing adsorption, the other tower is used for simultaneously decompressing and desorbing, and part of oxygen-enriched gas is introduced into the second adsorption tower in a counter-current direction (back flushing) so as to further remove nitrogen adsorbed in the last circulation. Two molecular sieve towers of the oxygen generator are independently installed and are connected with the oxygen storage tank, the control valves and the like through gas pipelines, and the oxygen generator is dispersed in structure, low in space utilization rate, large in product volume, low in oxygen generation efficiency, poor in assembly process, high in production cost and not beneficial to miniaturization, light weight, reliability and economy of the molecular sieve oxygen generator.
In addition, the molecular sieve oxygen generator using pressure swing adsorption oxygen generation technology generally includes an intake air processing unit, a gas compression unit, a gas separation unit, a gas storage unit, a control unit, and various connecting pipelines and lines. The molecular sieve adsorber as the core part of the gas separating unit has direct influence on the volume, weight, oxygen producing efficiency, etc. of the molecular sieve oxygen producing machine. The research on the miniaturization of the oxygen generator mainly reflects on the two aspects of the volume and the weight of the whole product. The molecular sieve adsorber has an important correlation among the structure of the adsorber, the product concentration and the yield, and under the same geometric condition, the structure of the adsorber is different, and the oxygen generation effect is different; under the condition of certain flow and concentration, the structure of the absorber is improved, so that the consumption of the molecular sieve can be reduced, the geometric size of the oxygen generator is reduced, and the aims of reducing the volume and the cost are fulfilled.
Under the general condition, the micro oxygen generator adopts the system structure of two adsorption towers and an oxygen storage tank, the volumes of the adsorption towers and the oxygen storage tank are basically equal, no matter how the three cylinders are placed, gaps are inevitably left between the three cylinders, and the dead spaces occupy the volume of the whole device but do not play any role. If the gap between the towers is used for storing oxygen, an oxygen storage tank can be omitted, and related gas valves are integrated, so that connecting pipelines, connectors and the like are reduced. Based on the design concept, the invention is suitable for the highly integrated molecular sieve adsorber of the micro oxygen generator.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the technical aspect of the prior molecular sieve adsorber, the utility model combines the development trend of the miniaturization of an oxygen generator, and provides a highly integrated molecular sieve adsorber suitable for a micro oxygen generator and a micro oxygen generator containing the molecular sieve adsorber.
In order to achieve the purpose, the utility model adopts the following technical proposal to realize:
a molecular sieve adsorber comprises a cylinder and two molecular sieve towers, wherein the two molecular sieve towers are arranged in the cylinder, and an oxygen storage cavity is formed between the outer side wall of each molecular sieve tower and the inner side wall of the cylinder; the oxygen storage cavity is communicated with the two molecular sieve towers through one-way valves respectively; the upper end opening and the lower end opening of the cylinder body are respectively and fixedly provided with a top cover and a bottom cover, the top cover is provided with a first air inlet and a second air inlet which are respectively connected with the two molecular sieve towers, and the top end of the top cover is provided with an electromagnetic valve for controlling the first air inlet and the second air inlet to be opened and closed.
In a further scheme, the electromagnetic valve is a pilot type two-position four-way diaphragm type electromagnetic valve, an air inlet, a first air outlet, a second air outlet and an air outlet are arranged on the electromagnetic valve, the first air outlet is communicated with the first air inlet, and the second air outlet is communicated with the second air inlet.
In a further scheme, sealing gaskets are arranged at the joints of the barrel body and the top cover and the bottom cover.
In a further scheme, the upper port and the lower port of the molecular sieve tower are respectively provided with a splitter plate in a packaging way, and the top end surface of the splitter plate is paved with a steel wire mesh.
In a further scheme, the bottom end of the splitter plate positioned at the upper port of the molecular sieve tower is connected with a spring.
In the further scheme, a sealing ring is clamped on a top cover positioned at the joint of the top cover and the molecular sieve tower, and an upper sealing groove is formed in the top cover positioned on the periphery of the sealing ring; the outer side wall of the top cover is provided with an oxygen outlet communicated with the oxygen storage cavity.
In a further scheme, a first cavity and a second cavity which are respectively matched with bottom ports of two molecular sieve towers are formed in the upper end surface of the bottom cover; the two check valves are fixedly arranged on the bottom cover, wherein the bottom end of the first check valve is communicated with the first cavity, the bottom end of the second check valve is communicated with the second cavity, and the top ends of the first check valve and the second check valve are communicated with the oxygen storage cavity; and a through hole is formed between the first cavity and the second cavity, and a throttle valve is arranged in the through hole.
Further, the periphery of the first cavity and the second cavity is provided with a lower sealing groove.
According to the further scheme, the outer side walls of the two ends of the barrel are welded with the connecting seats, and the top cover and the bottom cover are respectively provided with mounting holes matched and connected with the connecting seats.
The two ends of the molecular sieve tower are respectively packaged with the splitter plate, which plays a role of gas distribution and realizes the uniform distribution of the gas in the molecular sieve tower. The steel wire mesh is laid at the top end of the flow distribution plate, so that a molecular sieve mixed layer with different particle sizes can be prevented, and the impact of airflow pressure change on a bed layer can be relieved. In addition, a spring is welded at the bottom end of the flow distribution plate positioned at the upper part of the molecular sieve tower, so that the effect of supporting the flow distribution plate can be achieved, the flow distribution plate can be stable in working, and the pulverization probability of the molecular sieve is reduced.
The utility model discloses place the barrel inside in two molecular sieve towers in, keep away by the outside of molecular sieve tower and the cavity between the inside wall of barrel constitutes the storage that stores up oxygen chamber and be used for oxygen to saved this equipment of oxygen storage tank, the holistic volume and the weight that has significantly reduced. In addition, the molecular sieve tower is communicated with the oxygen storage cavity through the one-way valve, so that connecting pipelines, joints and the like between the molecular sieve tower and the oxygen storage cavity are reduced, and the overall size and weight are further reduced.
So the utility model discloses a molecular sieve adsorber adopts the integrated design of integration, and the space has effectively been practiced thrift in the clearance between the different subassemblies of make full use of, has reduced molecular sieve adsorber's volume and weight, has realized miniaturization, the lightweight of product, realizes the miniaturization of oxygenerator.
The air inlet, the air outlet and the like of the molecular sieve adsorber are realized by adopting a two-position four-way electromagnetic valve, thereby replacing the multi-valve control in the prior art and effectively reducing the number of valves; and then, by carrying out integrated design on a pipeline, a joint and the like, the molecular sieve adsorber is free of any air pipe and joint, so that the assembly manufacturability of the product is greatly improved, and the cost is reduced.
The utility model discloses with integration such as choke valve, check valve inside the molecular sieve adsorber to merge into voltage-sharing and blowback technique, improved the oxygen rate of recovery, reduced the quantity of molecular sieve, realize reducing volume, reduce cost's target.
Another object of the present invention is to provide a micro oxygen generator comprising the above molecular sieve adsorber, wherein the micro oxygen generator includes a portable oxygen generator, a vehicle-mounted oxygen generator, a household oxygen generator, and a medical oxygen generator.
The utility model discloses a molecular sieve adsorber is applicable to miniature oxygenerator fields such as portable oxygenerator, vehicular oxygenerator, domestic oxygenerator, medical oxygenerator, through adopting the utility model discloses a molecular sieve adsorber can further promote the miniaturized development of oxygenerator. Thereby developing a miniature oxygen generating device with small volume, light weight, low cost and high oxygen generating efficiency. The invention has very important practical significance and can bring very great economic value.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is an exploded perspective view of the present invention;
fig. 3 is a schematic structural diagram of the barrel in the present invention;
FIG. 4 is a schematic view of the top end cap;
fig. 5 is a schematic view of the bottom end cap construction.
In the figure: 1-an electromagnetic valve, 101-an air inlet, 102-a first air outlet, 103-a second air outlet and 104-an air outlet; 2-top cover, 201-first air inlet, 202-second air inlet, 203-oxygen outlet, 204-upper sealing groove; 3-cylinder, 301-connecting seat, 302-oxygen storage cavity; 4-bottom cover, 401-first cavity, 402-second cavity, 403-lower sealing groove, 404-through hole; 5-one-way valve, 501-first one-way valve, 502-second one-way valve; 6-molecular sieve column, 601-first molecular sieve column, 602-second molecular sieve column; 7-a splitter plate; 8-a spring; 9-sealing gasket.
Detailed Description
As shown in fig. 1-5, a molecular sieve adsorber comprises a cylinder 3 and two molecular sieve towers 6, wherein the two molecular sieve towers 6 are arranged inside the cylinder 3, and an oxygen storage cavity 302 is formed between the outer side wall of the molecular sieve tower 6 and the inner side wall of the cylinder 3 for storing oxygen; the oxygen storage cavity 302 is communicated with the two molecular sieve towers 6 through one-way valves 5 respectively; the upper and lower ports of the cylinder 3 are respectively provided with a top cover 2 and a bottom cover 4, and the joints of the cylinder 3 and the top cover 2 and the bottom cover 4 are respectively provided with a sealing gasket 9 for sealing so as to form a sealing cavity inside the cylinder 3. The top cover 2 is provided with a first air inlet 201 and a second air inlet 202 which are respectively connected with the two molecular sieve towers 6, and the top end of the top cover 2 is fixed by bolts or welded with an electromagnetic valve 1 which controls the opening and closing of the first air inlet 201 and the second air inlet 202, so that pressurized air is respectively led into the two molecular sieve towers through the electromagnetic valve 1.
As shown in fig. 1-3, the cylinder 3 is formed by processing an aluminum profile die, the thickness of the cylinder is 1.5mm, and the weight of the product is effectively reduced on the premise of ensuring the structural strength and the working pressure. The cylinder 3 is a cylinder, the first molecular sieve tower 601 and the second molecular sieve tower 602 are symmetrically arranged in the cylinder 3, and the middle gap is an oxygen storage cavity 302 for storing oxygen.
In a further scheme, the outer side walls of two ends of the barrel 3 are welded with connecting seats 301, and the top cover 2 and the bottom cover 4 are respectively provided with mounting holes matched and connected with the connecting seats; simultaneously, the sealing gaskets 9 are respectively embedded in the sealing grooves on the top cover 2 and the bottom cover 4, and during assembly, the top cover 2, the bottom cover 4 and the sealing gaskets 9 are respectively and fixedly connected with the connecting seat 301 on the barrel body 3 through bolts so as to ensure the air tightness inside the barrel body after connection.
In a further scheme, the electromagnetic valve 1 is a pilot type two-position four-way diaphragm type electromagnetic valve, and is provided with an air inlet 101, a first air outlet 102, a second air outlet 103 and an air outlet 104, wherein the first air outlet 102 is communicated with the first air inlet 201, and the second air outlet 103 is communicated with the second air inlet 202.
The electromagnetic valve is an integrated gas circuit electromagnetic valve, and a plurality of independent valves are integrally designed together, so that the pipeline is simplified, and the volume and the weight are reduced.
In a further scheme, the upper port and the lower port of the molecular sieve tower 6 are respectively provided with a splitter plate 7 in a packaging way, and the top end surface of the splitter plate 7 is paved with a steel wire mesh.
In a further scheme, the bottom end of the splitter plate 7 positioned at the upper port of the molecular sieve tower 6 is connected with a spring 8.
The splitter plate 7 is welded or embedded in two ports of the molecular sieve tower 6, and plays a role in gas distribution, so that the gas in the molecular sieve tower is uniformly distributed. The steel wire mesh is laid at the top end of the flow distribution plate, so that a molecular sieve mixed layer with different particle sizes can be prevented, and the impact of airflow pressure change on a bed layer can be relieved. In addition, a spring 8 is welded at the bottom end of the flow distribution plate positioned at the upper part of the molecular sieve tower, so that the effect of supporting the flow distribution plate 7 can be achieved, the flow distribution plate can be stable in working, and the pulverization probability of the molecular sieve is reduced.
In a further scheme, as shown in fig. 4, a seal ring is clamped on the top cover 2 at the joint with the molecular sieve tower 6, and an upper seal groove 204 is formed on the top cover 2 at the periphery of the seal ring; the outer side wall of the top cover 2 is provided with an oxygen outlet 203 communicated with the oxygen storage cavity 302, so that oxygen in the oxygen storage cavity 302 can be output.
In a further scheme, as shown in fig. 5, a first cavity 401 and a second cavity 402 which are respectively matched with the bottom ports of the two molecular sieve towers 6 are formed on the upper end surface of the bottom cover 4; the two check valves 5 are fixedly arranged on the bottom cover 4, wherein the bottom end of the first check valve 501 is communicated with the first cavity 401, the bottom end of the second check valve 502 is communicated with the second cavity 402, and the top ends of the first check valve 501 and the second check valve 502 are communicated with the oxygen storage cavity 302; a through hole 404 is formed between the first cavity 401 and the second cavity 402, and a throttle valve is installed in the through hole 404.
The oxygen treated by the molecular sieve tower respectively enters a corresponding first cavity 401 and a corresponding second cavity 402, the first cavity 401 is communicated with the oxygen storage cavity 302 through a first one-way valve 501, and the second cavity 402 is communicated with the oxygen storage cavity 302 through a second one-way valve 502; so that the oxygen treated by the two molecular sieve columns can be introduced into the oxygen storage chamber 302. In addition, a through hole 404 is formed between the first cavity 401 and the second cavity 402, and when oxygen is generated in one molecular sieve tower, a small part of oxygen can enter the other molecular sieve tower through the through hole 404 for back blowing.
Further, a lower sealing groove 403 is formed on the outer peripheries of the first cavity 401 and the second cavity 402 for placing the sealing gasket 9.
So the utility model discloses an integrated module of molecular sieve adsorber only leaves an air inlet, oxygen export and gas vent, has realized the high integration of each part, adopts this kind of integrated mode, with solenoid valve, pipeline, molecular sieve tower, oxygen storage tank, check valve, end cover, choke valve, flow distribution plate, spring assembly as an organic whole, has reduced volume, the weight of product. Meanwhile, due to the highly integrated design, pipelines, joints and the like are reduced, and the oxygen recovery rate and the manufacturability and the economy of the whole machine are improved.
Another object of the present invention is to provide a micro oxygen generator comprising the above molecular sieve adsorber, wherein the micro oxygen generator includes a portable oxygen generator, a vehicle-mounted oxygen generator, a household oxygen generator, and a medical oxygen generator.
The utility model discloses a molecular sieve adsorber is applicable to miniature oxygenerator fields such as portable oxygenerator, vehicular oxygenerator, domestic oxygenerator, medical oxygenerator, through adopting the utility model discloses a molecular sieve adsorber can further promote the miniaturized development of oxygenerator. Thereby developing a miniature oxygen generating device with small volume, light weight, low cost and high oxygen generating efficiency. The invention has very important practical significance and can bring very great economic value.
The utility model discloses molecular sieve adsorber's specific work flow as follows:
1) air with proper pressure and temperature enters through an air inlet 101 of the electromagnetic valve and enters into the first molecular sieve tower 601 from a first air outlet 102 and a first air inlet 201 on the top cover 2 or flows into the second molecular sieve tower 602 from a second air outlet 103 and a second air inlet 202 under the control of the electromagnetic valve;
2) when pressurized air flows into the first molecular sieve tower 601, the molecular sieve filled in the first molecular sieve tower 601 selectively adsorbs nitrogen molecules in the air, oxygen flows through the first molecular sieve tower 601, most of the oxygen enters the oxygen storage cavity 302 through the first one-way valve 501, a small amount of the oxygen flows into the second molecular sieve tower 602 through the throttle valve in the through hole 404 to purge the nitrogen adsorbed by the molecular sieve in the second molecular sieve tower 602, the nitrogen enters the electromagnetic valve 1 through the second air inlet 202 and is discharged from the air outlet 104 of the electromagnetic valve, so that the oxygen recovery rate is improved, and the oxygen in the oxygen storage cavity 302 flows out through the oxygen outlet 203 on the top cover 2 and is regulated by an external pressure reducing valve and a flow meter for personnel to use;
3) when the molecular sieve in the first molecular sieve tower 601 is saturated with adsorbed nitrogen, the solenoid valve 1 controls the pressurized air flowing in from the air inlet 101 to flow into the second molecular sieve tower 602 from the second air outlet 102 through the second air inlet 202 on the top cover 2, most of the oxygen separated from the second molecular sieve tower 602 enters the oxygen storage cavity 302 through the second one-way valve 502, and a small amount of oxygen flows into the first molecular sieve tower 601 through the throttle valve in the through hole 404 to purge nitrogen, so that the molecular sieve in the first molecular sieve tower 601 starts to release nitrogen and is discharged through the exhaust port 104 of the solenoid valve 1;
4) the above processes are periodically and circularly carried out alternately, and the high-concentration oxygen is continuously and uninterruptedly output under the separation action of the molecular sieve adsorber, so that the oxygen supply requirement of personnel is met.
The utility model discloses in "set firmly", "fixed connection", "installation", "fixed mounting", "erect" etc. all show that it is together fixed between the two parts of interconnect, generally fix together through modes such as welding, screw or gluing. "movably mounted," "slidably coupled," and the like refer to two components that are coupled together and capable of relative movement.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A molecular sieve adsorber, includes barrel (3) and two molecular sieve towers (6), its characterized in that: the two molecular sieve towers (6) are arranged in the barrel body (3), and an oxygen storage cavity (302) is formed between the outer side wall of the molecular sieve tower (6) and the inner side wall of the barrel body (3); the oxygen storage cavity (302) is communicated with the two molecular sieve towers (6) through one-way valves (5) respectively; the upper end opening and the lower end opening of the cylinder body (3) are respectively and fixedly provided with a top cover (2) and a bottom cover (4), the top cover (2) is provided with a first air inlet (201) and a second air inlet (202) which are respectively connected with two molecular sieve towers (6), and the top end of the top cover (2) is provided with an electromagnetic valve (1) for controlling the opening and closing of the first air inlet (201) and the second air inlet (202).
2. The molecular sieve adsorber of claim 1 further comprising: the electromagnetic valve (1) is a pilot type two-position four-way diaphragm type electromagnetic valve, an air inlet (101), a first air outlet (102), a second air outlet (103) and an air outlet (104) are formed in the pilot type two-position four-way diaphragm type electromagnetic valve, the first air outlet (102) is communicated with the first air inlet (201), and the second air outlet (103) is communicated with the second air inlet (202).
3. The molecular sieve adsorber of claim 1 further comprising: and sealing gaskets (9) are arranged at the joints of the barrel body (3) and the top cover (2) and the bottom cover (4).
4. The molecular sieve adsorber of claim 1 further comprising: the upper and lower ports of the molecular sieve tower (6) are respectively provided with a splitter plate (7) in a packaging way, and the top end surface of the splitter plate (7) is paved with a steel wire mesh.
5. The molecular sieve adsorber of claim 4 further comprising: the bottom end of the splitter plate (7) positioned at the upper port of the molecular sieve tower (6) is connected with a spring (8).
6. The molecular sieve adsorber of claim 1 further comprising: a sealing ring is clamped on the top cover (2) at the joint of the top cover and the molecular sieve tower (6), and an upper sealing groove (204) is arranged on the top cover (2) at the periphery of the sealing ring; the outer side wall of the top cover (2) is provided with an oxygen outlet (203) communicated with the oxygen storage cavity (302).
7. The molecular sieve adsorber of claim 1 further comprising: a first cavity (401) and a second cavity (402) which are respectively matched with the bottom ports of the two molecular sieve towers (6) are formed in the upper end face of the bottom cover (4); the two check valves (5) are fixedly arranged on the bottom cover (4), wherein the bottom end of the first check valve (501) is communicated with the first cavity (401), the bottom end of the second check valve (502) is communicated with the second cavity (402), and the top ends of the first check valve (501) and the second check valve (502) are communicated with the oxygen storage cavity (302); a through hole (404) is formed between the first cavity (401) and the second cavity (402), and a throttle valve is installed in the through hole (404).
8. The molecular sieve adsorber of claim 7 further comprising: and a lower sealing groove (403) is formed on the peripheries of the first cavity (401) and the second cavity (402).
9. The molecular sieve adsorber of claim 1 further comprising: the outer side walls of the two ends of the barrel body (3) are welded with connecting seats (301), and mounting holes matched and connected with the connecting seats are respectively formed in the top cover (2) and the bottom cover (4).
10. A micro-oxygenerator comprising a molecular sieve adsorber as claimed in any of claims 1 to 9, characterised in that: the miniature oxygen generator comprises a portable oxygen generator, a vehicle-mounted oxygen generator, a household oxygen generator and a medical oxygen generator.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921996873.7U CN211366956U (en) | 2019-11-18 | 2019-11-18 | Molecular sieve adsorber and micro oxygen generator containing same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921996873.7U CN211366956U (en) | 2019-11-18 | 2019-11-18 | Molecular sieve adsorber and micro oxygen generator containing same |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112604449A (en) * | 2020-12-30 | 2021-04-06 | 尚铁军 | Medical manual oxygen generator |
| CN115377803A (en) * | 2022-09-08 | 2022-11-22 | 河南宣和钧釉环保材料有限公司 | Novel negative oxygen ion generation accelerator |
-
2019
- 2019-11-18 CN CN201921996873.7U patent/CN211366956U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112604449A (en) * | 2020-12-30 | 2021-04-06 | 尚铁军 | Medical manual oxygen generator |
| CN115377803A (en) * | 2022-09-08 | 2022-11-22 | 河南宣和钧釉环保材料有限公司 | Novel negative oxygen ion generation accelerator |
| CN115377803B (en) * | 2022-09-08 | 2024-02-23 | 河南宣和钧釉环保材料有限公司 | Negative oxygen ion generation accelerator |
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