CN215249560U - VPSA oxygen generating equipment with automatic oxygen pressing system switching function - Google Patents
VPSA oxygen generating equipment with automatic oxygen pressing system switching function Download PDFInfo
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- CN215249560U CN215249560U CN202121890812.XU CN202121890812U CN215249560U CN 215249560 U CN215249560 U CN 215249560U CN 202121890812 U CN202121890812 U CN 202121890812U CN 215249560 U CN215249560 U CN 215249560U
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Abstract
The utility model discloses a VPSA oxygen generation device with an oxygen generation system automatically switched, which comprises an oxygen generation system and an oxygen generation system connected with the oxygen generation system through a pipeline; the system is characterized in that the oxygen pressing system comprises a buffer tank connected with the oxygen making system through a pipeline, an oxygen pressing machine module connected with the buffer tank through a pipeline and an oxygen balancing tank connected with the oxygen pressing machine module through a pipeline; the oxygen compressor module comprises a main oxygen compressor, a standby oxygen compressor and two standby oxygen compressors which are connected in parallel. The utility model discloses a through the setting of oxygen press module, if main oxygen press breaks down or need maintain in the use after then system automatic switch-over to reserve oxygen press carry out work, overhaul main oxygen press through operating personnel simultaneously, when reserve oxygen press breaks down, then switch over to two and reserve oxygen press and carry out work to make whole oxygen system keep normal operating constantly, can not influence an air demand for the line, can also guarantee economic benefits simultaneously.
Description
Technical Field
The utility model relates to an oxygen making equipment specifically indicates a VPSA oxygen making equipment of oxygen system automatic switch-over presses.
Background
The vacuum pressure swing adsorption oxygen producing technology is a new type of oxygen-rich oxygen producing technology from air, and is a physical process similar to isothermal change, and is one gas separation process with different adsorption capacity of different components in gas medium on the adsorbent. The vacuum pressure swing adsorption molecular sieve oxygen production equipment takes electric power as power and air as raw materials, utilizes the characteristics that the adsorption capacity of the zeolite molecular sieve to nitrogen is increased under the positive pressure state and the adsorption capacity to nitrogen is reduced under the negative pressure state, and forms the cycle process of positive pressure adsorption and negative pressure desorption by switching the two adsorption towers, thereby realizing the separation of oxygen and nitrogen in the air and continuously producing the required industrial oxygen.
Thereby still need be equipped with the oxygen compressor in the empty system oxygen equipment that divides usually and satisfy the pressure and the stability assurance of an air demand, all only be equipped with one or a set of pressure oxygen machine and use in general system oxygen, but after this pressure oxygen machine breaks down, need overhaul, still need change when serious, shut down then can lead to the air supply system to suspend, will influence a line of air demand and economic benefits loss great with the longer time when serious. Therefore, the VPSA oxygen generation equipment with the oxygen compression system automatically switched is provided.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problems and providing a VPSA oxygen generating device with an automatic oxygen compression system switching function.
In order to achieve the aim, the utility model provides a VPSA oxygen generation device with an automatic switching oxygen compression system, which comprises an oxygen generation system and an oxygen compression system connected with the oxygen generation system through a pipeline; the oxygen generation system comprises a main oxygen generation system for standby and a standby oxygen generation system; the system is characterized in that the oxygen pressing system comprises a buffer tank connected with the oxygen making system through a pipeline, an oxygen pressing machine module connected with the buffer tank through a pipeline and an oxygen balancing tank connected with the oxygen pressing machine module through a pipeline; the oxygen compressor module comprises a main oxygen compressor, a standby oxygen compressor and two standby oxygen compressors which are connected in parallel; the oxygen balance tank is connected with an analysis sampling point and an oxygen analyzer, one path of the oxygen balance tank is connected with a user through a pipeline, and the other path of the oxygen balance tank is connected with an oxygen generation system through a pipeline; and the pipeline of the oxygen balance tank connected with the user is connected with a monitoring module and a switch module.
Preferably, the main oxygen compressor, the standby oxygen compressor and the secondary oxygen compressor comprise a filter, a compressor, a heat exchanger, a check valve and a butterfly valve which are connected in parallel on a pipeline; butterfly valves are arranged on pipelines at two ends of the main oxygen compressor, the standby oxygen compressor and the secondary oxygen compressor; the main oxygen compressor, the standby oxygen compressor and the two standby oxygen compressors are also connected with a silencer through pipelines.
Preferably, the monitoring module comprises a temperature monitoring module, a flow monitoring module and a pressure monitoring module, and the temperature monitoring module comprises a temperature measuring point, a thermometer and a temperature monitoring alarm; the flow monitoring module comprises a flow transmitter, a flow monitoring accumulation and a flowmeter; the pressure monitoring module comprises a pressure transmitter, a pressure measuring point, a pressure monitoring alarm interlock, a switch module and a silencer; the switch module comprises a regulating valve and a solenoid valve.
Further preferably, the main oxygen generation system and the standby oxygen generation system both comprise an air inlet filter, an air blower connected with the air inlet filter through a pipeline, a heat exchanger connected with the air blower through a pipeline, an air inlet pipeline connected with the heat exchanger, an adsorption mechanism connected with the air inlet pipeline, and an air outlet pipeline arranged on the adsorption mechanism, wherein the air outlet pipeline is connected with the oxygen compression system.
Preferably, the air inlet pipeline is connected with a vacuum pump through a pipeline, the vacuum pump is connected with a silencing tower through a pipeline, a plurality of switch modules are connected between the air inlet pipeline and the vacuum pump in parallel, and the switch modules are also connected with a silencing tower II through pipelines; the vacuum pump is also connected with the blower through a pipeline.
Preferably, the adsorption mechanism comprises an adsorption tower A and an adsorption tower B, and a pressure detection module and a switch module are arranged on gas outlet pipelines connected with the oxygen compression system of the adsorption tower A and the adsorption tower B; and two groups of switch modules are connected in parallel on the air outlet pipeline.
Preferably, the adsorption mechanism is also connected with a second air inlet pipeline, the second air inlet pipeline is connected with a switch module, a temperature monitoring module, a pressure monitoring module and a filter, one path of the filter is connected with the oxygen compression system through a pipeline, and the other path of the filter is connected with the instrument air system through a pipeline; the pipelines of the filter, the oxygen compression system and the instrument air system are connected with a pressure reducing valve and a switch module.
The utility model discloses a setting of oxygen press module, oxygen press module contains the main oxygen press of parallel connection, reserve oxygen press and two reserve oxygen presses, in the use if the main oxygen press breaks down or need maintain after then the system automatic switch to reserve oxygen press and carry out work, overhaul main oxygen press through operating personnel simultaneously, when the reserve oxygen press breaks down, then switch to two reserve oxygen presses and carry out work, thereby make whole oxygen system constantly keep normal operating, can not influence the first-line gas demand, can also guarantee economic benefits simultaneously;
the oxygen balance tank is connected with an analysis sampling point and an oxygen analyzer, sampling analysis is carried out before oxygen is conveyed to a user, when the oxygen is found not to meet the standard, the oxygen is conveyed back to the oxygen generation system through a pipeline to carry out adsorption oxygen generation again, the oxygen is conveyed to the user until the oxygen at the oxygen balance tank is qualified after sampling, and the quality of output oxygen is ensured;
still be connected with instrument air system through on the system oxygen system, also can return to the system oxygen system and adsorb the system oxygen again to the oxygen in the instrument air system, not only the simple system oxygen of adsorbing from the air.
Drawings
FIG. 1 is a schematic diagram of a middle oxygen generation system of the present invention;
FIG. 2 is a schematic diagram of the medium pressure oxygen system of the present invention;
fig. 3 is a schematic diagram of a monitoring module of the present invention;
fig. 4 is a partial schematic diagram of the middle switch module and the pressure monitoring module of the present invention.
Illustration of the drawings: 1. an oxygen generation system; 11. a main oxygen generation system; 12. a standby oxygen generation system; 13. an intake air filter; 14. a blower; 15. a heat exchanger; 16. an air intake line; 161. a vacuum pump; 162. a silencing tower; 163. a second silencing tower; 17. an adsorption mechanism; 171. an adsorption tower A; 172. a second adsorption tower; 173. an air inlet pipeline II; 18. an air outlet pipeline; 2. a pressure oxygen system; 3. a buffer tank; 4. an oxygen compressor module; 41. a main oxygen compressor; 42. a standby oxygen compressor; 43. preparing a pressure oxygen machine; 44. a filter; 45. a compressor; 46. a check valve; 47. a butterfly valve; 48. a muffler; 5. an oxygen balance tank; 51. analyzing the sampling points; 52. an oxygen analyzer; 6. a monitoring module; 61. a temperature monitoring module; 611. measuring a temperature point; 612. a thermometer; 613. monitoring and alarming the temperature; 62. a flow monitoring module; 621. a flow transmitter; 622. monitoring and accumulating the flow; 623. a flow meter; 63. a pressure monitoring module; 631. a pressure transmitter; 632. measuring a pressure point; 633. the pressure monitoring alarm interlock; 7. a switch module; 71. adjusting a valve; 72. an electromagnetic valve; 8. an instrument air system; 81. a pressure reducing valve.
Detailed Description
The following will further describe the automatic switching VPSA oxygen generation device of the oxygen compression system of the present invention with reference to the accompanying drawings.
Referring to fig. 1-2, the VPSA oxygen generation apparatus with an automatic oxygen compression system switching function of the present embodiment includes an oxygen generation system 1, and an oxygen compression system 2 connected to the oxygen generation system 1 through a pipeline; the oxygen generation system 1 comprises a main oxygen generation system 11 for standby and a standby oxygen generation system 12; the system is characterized in that the oxygen pressing system 2 comprises a buffer tank 3 connected with the oxygen making system 1 through a pipeline, an oxygen pressing machine module 4 connected with the buffer tank 3 through a pipeline and an oxygen balancing tank 5 connected with the oxygen pressing machine module 4 through a pipeline; the oxygen compressor module 4 comprises a main oxygen compressor 41, a standby oxygen compressor 42 and two standby oxygen compressors 43 which are connected in parallel; the oxygen balance tank 5 is connected with an analysis sampling point 51 and an oxygen analyzer 52, one path of the oxygen balance tank 5 is connected with a user through a pipeline, and the other path is connected with the oxygen generation system 1 through a pipeline; the pipeline of the oxygen balance tank 5 connected with the user is connected with a monitoring module 6 and a switch module 7; through the setting of the oxygen compressor module 4, the oxygen compressor module 4 comprises a main oxygen compressor 41, a standby oxygen compressor 42 and a secondary oxygen compressor 43 which are connected in parallel, when the main oxygen compressor 41 breaks down or needs to be maintained in the using process, the system is automatically switched to the standby oxygen compressor 42 to work, meanwhile, the main oxygen compressor 41 is overhauled by an operator, and when the standby oxygen compressor 42 breaks down, the standby oxygen compressor 43 is switched to work, so that the whole oxygen supply system constantly keeps normal operation, the requirement of first-line gas utilization is not influenced, and economic benefits can be guaranteed; through being connected with analysis sampling point 51 and oxygen analysis appearance 52 on oxygen balance tank 5, carry out the analysis of taking a sample before oxygen carries to the user, then send it back to system oxygen system 1 through the pipeline and adsorb the system oxygen once more when finding oxygen not reaching standard, just can carry to the user after 5 oxygen samplings of oxygen balance tank are qualified, guarantee output oxygen quality.
Further, referring to fig. 2, the main oxygenator 41, the standby oxygenator 42 and the two standby oxygenators 43 each include a filter 44, a compressor 45, a heat exchanger 15, and a check valve 46 and a butterfly valve 47 connected in parallel on a pipeline; butterfly valves 47 are arranged on pipelines at two ends of the main oxygen compressor 41, the standby oxygen compressor 42 and the secondary oxygen compressor 43; the main oxygen compressor 41, the standby oxygen compressor 42 and the secondary oxygen compressor 43 are also connected with a silencer 48 through pipelines; by arranging the main oxygen compressor 41, the standby oxygen compressor 42 and the secondary oxygen compressor 43, when the main oxygen compressor 41 breaks down or needs to be maintained in the using process, the system is automatically switched to the standby oxygen compressor 42 to work, meanwhile, the main oxygen compressor 41 is overhauled by an operator, when the standby oxygen compressor 42 breaks down, the standby oxygen compressor 43 is switched to work, so that the whole oxygen supply system always keeps normal operation, the requirement of first-line gas supply cannot be influenced, the economic benefit can be ensured, one oxygen compressor is always in a standby state when the oxygen supply system is used, accidents are prevented constantly, and the normal operation of the oxygen supply system can be well ensured; the silencer 48 is provided to perform silencing and noise reduction for the exhaust of the main oxygenator 41, the standby oxygenator 42, and the secondary oxygenator 43.
Further, referring to fig. 1-4, the monitoring module 6 comprises a temperature monitoring module 61, a flow monitoring module 62, and a pressure monitoring module 63, wherein the temperature monitoring module 61 comprises a temperature measuring point 611, a thermometer 612, and a temperature monitoring alarm 613; the flow monitoring module 62 comprises a flow transmitter 621, a flow monitoring accumulator 622 and a flow meter 623; the pressure monitoring module 63 comprises a pressure transmitter 631, a pressure measuring point 632, a pressure monitoring alarm interlock 633, a switch module 7 and a silencer 48; the switch module 7 comprises a regulating valve 71 and a solenoid valve 72; the temperature, the flow and the pressure of the oxygen in the pipeline are monitored in real time through the arrangement of the monitoring module 6 and the temperature monitoring module 61, the flow monitoring module 62 and the pressure monitoring module 63; by the arrangement of the switch module 7, the flow path is cut off and switched.
Further, referring to fig. 1, each of the main oxygen generation system 11 and the standby oxygen generation system 12 includes an air inlet filter 13, an air blower 14 connected to the air inlet filter 13 through a pipeline, a heat exchanger 15 connected to the air blower 14 through a pipeline, an air inlet pipeline 16 connected to the heat exchanger 15, an adsorption mechanism 17 connected to the air inlet pipeline 16, and an air outlet pipeline 18 connected to the adsorption mechanism 17, wherein the air outlet pipeline 18 is connected to the oxygen compression system 2; through the setting of main system oxygen system 11 and reserve system oxygen 12, also for one is equipped with one, then start another system oxygen system and make oxygen when certain system breaks down and need overhaul, guarantee system oxygen 1 and the normal operating of pressing oxygen system 2.
Further, referring to fig. 1, the air intake pipeline 16 is connected with a vacuum pump 161 through a pipeline, the vacuum pump 161 is connected with a silencer tower 162 through a pipeline, a plurality of switch modules 7 are connected in parallel between the air intake pipeline 16 and the vacuum pump 161, and the switch modules 7 are also connected with a silencer tower two 163 through a pipeline; the vacuum pump 161 is also connected with the blower 14 through a pipeline; the air remaining in the pipeline is sucked into the silencer tower 162 by the vacuum pump 161, and is exhausted after being silenced and denoised by the silencer tower 162.
Further, referring to fig. 1 and fig. 3 to 4, the adsorption mechanism 17 includes an adsorption tower a171 and an adsorption tower B172, and a pressure monitoring module 63 and a switch module 7 are disposed on the gas outlet pipeline 18 of the adsorption tower a171 and the adsorption tower B172 connected to the oxygen compression system 2; the gas outlet pipeline 18 is also connected with two groups of switch modules 7 in parallel; two sets of switch modules 7 are connected in parallel on the outlet gas pipeline 18, so that the flow paths of the adsorption tower A171 and the adsorption tower B172 are switched through the switch modules 7, and when the adsorption tower A171 needs to be overhauled and maintained, the flow paths are switched through the switch modules 7, so that the outlet gas pipeline 18 of the other adsorption tower B172 flows.
Further, referring to fig. 1, the adsorption mechanism 17 is further connected with a second air inlet pipeline 173, the second air inlet pipeline 173 is connected with a switch module 7, a temperature monitoring module 61, a pressure monitoring module 63 and a filter 44, one path of the filter 44 is connected with the oxygen compression system 2 through a pipeline, and the other path of the filter 44 is connected with the instrument air system 8 through a pipeline; the pipelines of the filter 44 connected with the oxygen compression system 2 and the instrument air system 8 are both connected with a pressure reducing valve 81 and a switch module 7; through be connected with two 173 of air inlet pipeline on adsorption apparatus structure 17, two 173 of air inlet pipeline and pressure oxygen system 2 and instrument air system 8 intercommunication, make and carry out the analysis of taking a sample before oxygen carries to the user, when finding that oxygen does not reach standard then send it back to through two 173 of air inlet pipelines and adsorb once more to export again to pressure oxygen system 2 after oxygen system 17 carries out the oxygen system of adsorbing once more, simultaneously can also make oxygen among the instrument air system 8 also can return to adsorption apparatus structure 17 and adsorb the oxygen system again, not only the air of inhaling from the external world and adsorb the oxygen system.
The utility model discloses a theory of operation: referring to fig. 1-4, firstly, the blower 14 is started, air is sucked through the blower 14, when air is sucked, the air is firstly filtered through the air inlet filter 13, the air flows to the heat exchanger 15 through the pipeline, is heated by the heat exchanger 15 and then flows to the adsorption mechanism 17 through the air inlet pipeline 16, when the adsorption tower a is used, the switch module 7 on the air inlet pipeline 16 automatically switches the flow path, so that the air flows into the adsorption tower a to perform adsorption oxygen generation, after the oxygen generation is completed, the oxygen flows to the oxygen compression system 2 through the air outlet pipeline 18, and the waste gas is sucked to the silencing tower 162 through the vacuum pump 161, is silenced and reduced in noise through the silencing tower 162 and then is discharged; oxygen flows into the buffer tank 3 through the gas outlet pipeline 18, the oxygen flows to the oxygen compressor module 4 through a pipeline, when a main oxygen compressor 41 in the oxygen compressor module 4 is used, the butterfly valves 47 on two sides are closed by the other two butterfly valves, when the main oxygen compressor 41 is maintained, one of the other two butterfly valves is opened, the other one is used as a standby, a flow path is cut off, so that the oxygen flows to the main oxygen compressor 41, the oxygen is compressed by the main oxygen compressor 41 and flows to the oxygen balance tank 5 through the pipeline after the stability is adjusted, the oxygen is sampled through an analysis sampling point 51 and analyzed through an oxygen analyzer 52, and when the oxygen quality reaches the standard after detection, the oxygen balance tank 5 conveys the oxygen to a user through the pipeline; when the oxygen in the oxygen balance tank 5 is unqualified, the flow path flowing to the user is cut off through the switch module 7, so that the unqualified oxygen flows back to the adsorption mechanism 17 and returns to the adsorption tower A171 or the adsorption tower B172 for re-adsorption; and the air source of the adsorption mechanism 17 comprises the outside air, the oxygen returned by the oxygen compression system 2 and the air of the instrument air system 8 when in use.
The scope of the present invention is not limited to the above embodiments and their variations. The present invention is not limited to the above embodiments, and other modifications and substitutions may be made by those skilled in the art.
Claims (7)
1. A VPSA oxygen generation device with an oxygen compression system capable of automatically switching comprises an oxygen generation system (1) and an oxygen compression system (2) connected with the oxygen generation system (1) through a pipeline; the oxygen generation system (1) comprises a main oxygen generation system (11) for standby and a standby oxygen generation system (12); the system is characterized in that the oxygen pressing system (2) comprises a buffer tank (3) connected with the oxygen generating system (1) through a pipeline, an oxygen pressing machine module (4) connected with the buffer tank (3) through a pipeline and an oxygen balancing tank (5) connected with the oxygen pressing machine module (4) through a pipeline; the oxygen compressor module (4) comprises a main oxygen compressor (41), a standby oxygen compressor (42) and two standby oxygen compressors (43) which are connected in parallel; the oxygen balance tank (5) is connected with an analysis sampling point (51) and an oxygen analyzer (52), one path of the oxygen balance tank (5) is connected with a user through a pipeline, and the other path of the oxygen balance tank is connected with the oxygen generation system (1) through a pipeline; the oxygen balance tank (5) is connected with a monitoring module (6) and a switch module (7) on a pipeline of a user.
2. The VPSA oxygen generation equipment with the automatic oxygen compression system switching function according to claim 1, wherein the VPSA oxygen generation equipment comprises: the main oxygen compressor (41), the standby oxygen compressor (42) and the secondary oxygen compressor (43) respectively comprise a filter (44), a compressor (45), a heat exchanger (15), a check valve (46) and a butterfly valve (47) which are connected in parallel on a pipeline; butterfly valves (47) are arranged on pipelines at two ends of the main oxygen compressor (41), the standby oxygen compressor (42) and the secondary oxygen compressor (43); the main oxygen compressor (41), the standby oxygen compressor (42) and the secondary oxygen compressor (43) are also connected with a silencer (48) through pipelines.
3. The VPSA oxygen generation equipment with the automatic oxygen compression system switching function according to claim 1, wherein the VPSA oxygen generation equipment comprises: the monitoring module (6) comprises a temperature monitoring module (61), a flow monitoring module (62) and a pressure monitoring module (63), wherein the temperature monitoring module (61) comprises a temperature measuring point (611), a thermometer (612) and a temperature monitoring alarm (613); the flow monitoring module (62) comprises a flow transmitter (621), a flow monitoring accumulation (622) and a flow meter (623); the pressure monitoring module (63) comprises a pressure transmitter (631), a pressure measuring point (632), a pressure monitoring alarm interlock (633), a switch module (7) and a silencer (48); the switching module (7) comprises a regulating valve (71) and a solenoid valve (72).
4. The VPSA oxygen generation equipment with the automatic oxygen compression system switching function according to claim 1, wherein the VPSA oxygen generation equipment comprises: the main oxygen generation system (11) and the standby oxygen generation system (12) both comprise an air inlet filter (13), an air blower (14) connected with the air inlet filter (13) through a pipeline, a heat exchanger (15) connected with the air blower (14) through a pipeline, an air inlet pipeline (16) connected with the heat exchanger (15), an adsorption mechanism (17) connected with the air inlet pipeline (16) and an air outlet pipeline (18) arranged on the adsorption mechanism (17), wherein the air outlet pipeline (18) is connected with the oxygen compression system (2).
5. The VPSA oxygen generation equipment with the automatic oxygen compression system switching function according to claim 4, wherein the oxygen compression system comprises: the air inlet pipeline (16) is connected with a vacuum pump (161) through a pipeline, the vacuum pump (161) is connected with a silencing tower (162) through a pipeline, a plurality of switch modules (7) are connected between the air inlet pipeline (16) and the vacuum pump (161) in parallel, and the switch modules (7) are also connected with a second silencing tower (163) through pipelines; the vacuum pump (161) is also connected with the blower (14) through a pipeline.
6. The VPSA oxygen generation equipment with the automatic oxygen compression system switching function according to claim 4, wherein the oxygen compression system comprises: the adsorption mechanism (17) comprises an adsorption tower A (171) and an adsorption tower B (172), and a pressure monitoring module (63) and a switch module (7) are arranged on a gas outlet pipeline (18) of the adsorption tower A (171) and the adsorption tower B (172) connected with the oxygen compression system (2); and two groups of switch modules (7) are also connected in parallel on the air outlet pipeline (18).
7. The VPSA oxygen generation equipment with the automatic oxygen compression system switching function according to claim 4, wherein the oxygen compression system comprises: the adsorption mechanism (17) is also connected with a second air inlet pipeline (173), the second air inlet pipeline (173) is connected with a switch module (7), a temperature monitoring module (61), a pressure monitoring module (63) and a filter (44), one path of the filter (44) is connected with the oxygen compression system (2) through a pipeline, and the other path of the filter (44) is connected with an instrument air system (8) through a pipeline; and the pipelines of the filter (44) connected with the oxygen compression system (2) and the instrument air system (8) are connected with a pressure reducing valve (81) and a switch module (7).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121890812.XU CN215249560U (en) | 2021-08-13 | 2021-08-13 | VPSA oxygen generating equipment with automatic oxygen pressing system switching function |
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| CN202121890812.XU CN215249560U (en) | 2021-08-13 | 2021-08-13 | VPSA oxygen generating equipment with automatic oxygen pressing system switching function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116838568A (en) * | 2023-08-31 | 2023-10-03 | 沈阳海龟医疗科技有限公司 | Internal air inlet circulation oil-free vacuum compressor with filtering system for oxygenerator |
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2021
- 2021-08-13 CN CN202121890812.XU patent/CN215249560U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116838568A (en) * | 2023-08-31 | 2023-10-03 | 沈阳海龟医疗科技有限公司 | Internal air inlet circulation oil-free vacuum compressor with filtering system for oxygenerator |
| CN116838568B (en) * | 2023-08-31 | 2023-11-14 | 沈阳海龟医疗科技有限公司 | Internal air inlet circulation oil-free vacuum compressor with filtering system for oxygenerator |
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