CN117184372A - Circulating type scuba for prolonging oxygen supply time - Google Patents
Circulating type scuba for prolonging oxygen supply time Download PDFInfo
- Publication number
- CN117184372A CN117184372A CN202311352627.9A CN202311352627A CN117184372A CN 117184372 A CN117184372 A CN 117184372A CN 202311352627 A CN202311352627 A CN 202311352627A CN 117184372 A CN117184372 A CN 117184372A
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- Prior art keywords
- oxygen
- tank
- carbon dioxide
- generating
- valve
- Prior art date
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 201
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 201
- 239000001301 oxygen Substances 0.000 title claims abstract description 201
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 112
- 230000002745 absorbent Effects 0.000 claims abstract description 73
- 239000002250 absorbent Substances 0.000 claims abstract description 73
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 56
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 56
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 48
- 230000029058 respiratory gaseous exchange Effects 0.000 claims abstract description 41
- 239000007789 gas Substances 0.000 claims abstract description 24
- 239000006096 absorbing agent Substances 0.000 claims abstract description 7
- 230000009189 diving Effects 0.000 claims abstract description 5
- 238000010521 absorption reaction Methods 0.000 claims description 13
- 210000004072 lung Anatomy 0.000 claims description 12
- 230000002035 prolonged effect Effects 0.000 claims 1
- 239000000725 suspension Substances 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- UBAZGMLMVVQSCD-UHFFFAOYSA-N carbon dioxide;molecular oxygen Chemical compound O=O.O=C=O UBAZGMLMVVQSCD-UHFFFAOYSA-N 0.000 abstract description 3
- 230000003434 inspiratory effect Effects 0.000 description 4
- 230000002685 pulmonary effect Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Abstract
The invention discloses a circulating type diving breathing apparatus for prolonging the oxygen supply time, which has the advantages that the integrated structural design of an oxygen bottle, an oxygen generator tank and a carbon dioxide absorbent tank is compact, the structure design is convenient to carry, the oxygen generator in the oxygen generator tank and the carbon dioxide absorbent in the carbon dioxide absorbent tank are combined, so that the oxygen generator can chemically react with carbon dioxide in gas exhaled by a diver to generate oxygen, carbon dioxide which does not chemically react with the oxygen generator enters the carbon dioxide absorbent tank to be absorbed by the carbon dioxide absorbent, and the oxygen generated by the reaction of the carbon dioxide and the oxygen generator can be supplied to the diver for breathing, thereby fully utilizing the carbon dioxide; the invention can supply oxygen in the oxygen bottle, and oxygen generated by the reaction of carbon dioxide and the oxygen generating agent can also supply oxygen, thereby increasing the oxygen supply time and prolonging the underwater operation time of divers. The invention can also prompt divers in time when oxygen generating agents or carbon dioxide absorbing agents are about to run out.
Description
Technical Field
The invention relates to the technical field of circulating type scuba, in particular to a circulating type scuba for prolonging oxygen supply time.
Background
The working principle of the circulating type scuba is that the gas exhaled by the diver is absorbed by the carbon dioxide absorbent tank and then enters the breathing circuit again for breathing by the diver. The oxygen bottle and the carbon dioxide absorbent tank in the circulating type diving breathing apparatus are of a separated design, so that the diving breathing apparatus is inconvenient to carry, carbon dioxide exhaled by the existing diving personnel is generally absorbed by the carbon dioxide absorbent in the carbon dioxide absorbent tank, and the carbon dioxide is not well utilized. Based on the above, a new circulating type scuba is designed by a designer, the integrated structural design of an oxygen bottle, an oxygen generator tank and a carbon dioxide absorbent tank is compact in structural design and convenient to carry, the oxygen generator in the oxygen generator tank and the carbon dioxide absorbent in the carbon dioxide absorbent tank are combined, so that the oxygen generator can chemically react with carbon dioxide in gas exhaled by a diver to generate oxygen, carbon dioxide which does not chemically react with the oxygen generator enters the carbon dioxide absorbent tank to be absorbed by the carbon dioxide absorbent, and the oxygen generated by the reaction of the carbon dioxide and the oxygen generator can be supplied to the diver for breathing, thereby the carbon dioxide is fully utilized; in addition, the invention can supply oxygen in the oxygen bottle, and oxygen generated by the reaction of carbon dioxide and the oxygen generating agent can also supply oxygen, thereby increasing the oxygen supply time and prolonging the underwater operation time of divers.
Disclosure of Invention
The invention provides a novel circulating type scuba for prolonging the oxygen supply time, which aims at the problems and the defects existing in the prior art.
The invention solves the technical problems by the following technical proposal:
the invention provides a circulating type scuba for prolonging the oxygen supply time, which comprises an oxygen bottle, a breathing mask, an inspiration lung bag, an expiration lung bag and a controller, and is characterized in that an inner absorbent tank body and an outer oxygen generating tank body are coaxially sleeved and fixed on the outer surface of the oxygen bottle from inside to outside in sequence, the openings of the inner absorbent tank body and the outer oxygen generating tank body are downward, the bottom end of the inner absorbent tank body and the bottom end of the outer oxygen generating tank body are flush with the bottom end of the bottle body, a tank cover with a concave section and a hollow structure inside is detachably fixed at the bottom of the outer oxygen generating tank body, the bottom opening of the inner absorbent tank body and the bottom opening of the outer oxygen generating tank body are simultaneously sealed at the inner bottom of the tank cover, the positions of the inner bottom of the tank cover, which correspond to the oxygen generating cavity in the outer oxygen generating tank body and the absorber cavity in the inner absorbent tank body, are of a porous structure, the porous structure is arranged to enable only gas to pass through, an oxygen bottle opening of the bottle body is communicated with an air suction port of the breathing mask through an air suction pipeline, an oxygen supply electric valve, a driving pump, a flow sensor, an air suction pulmonary bag and an air suction one-way valve are sequentially arranged on the air suction pipeline, an air outlet of the breathing mask is communicated with one end of an air outlet pipeline, two branch pipelines at the other end of the air outlet pipeline are inserted at the top of an oxygen generating agent cavity and are respectively positioned at the left side and the right side of the bottle body, an air suction one-way valve and an air suction pulmonary bag are sequentially arranged on the air outlet pipeline, one end of an oxygen generating pipeline is respectively inserted at the top of the absorbent cavity and is respectively positioned at the left side and the right side of the bottle body, the other end of each oxygen generating pipeline is connected and communicated with the air suction pipeline between the oxygen supply electric valve and the driving pump, each oxygen production pipeline is provided with an oxygen production one-way valve.
Oxygen production temperature sensors are arranged below the inner wall lower part of the outer oxygen generating agent tank body and the exhalation pipeline positioned at the upper part of the oxygen generating agent cavity, and absorption temperature sensors are arranged below the oxygen production pipeline positioned at the upper part of the inner wall of the inner absorbent tank body and the upper part of the absorbent cavity.
The flow sensor is used for detecting the gas flow in the air suction pipeline and transmitting the gas flow to the controller, and the controller is used for controlling the oxygen supply electric valve to be opened and driving the pump to start when the gas flow is judged to be lower than the set lower limit value, controlling the driving pump to pump oxygen in the oxygen cylinder and oxygen in the oxygen production pipeline to enter the breathing mask for breathing by a diver, and controlling the oxygen supply electric valve to be closed and the driving pump to be suspended when the gas flow is judged to reach the set upper limit value.
Each oxygen generating temperature sensor is used for detecting the temperature of the position of the oxygen generating agent cavity at regular time to serve as an oxygen generating temperature value, the controller is used for judging whether the average value of the oxygen generating temperature values is larger than a first set temperature limit value at regular time, and if so, warning information that the oxygen generating agent is about to run out is sent out; each absorption temperature sensor is used for detecting the temperature of the position of the absorber cavity at regular time as an absorption temperature value; the controller is used for judging whether the average value of the absorption temperature values is larger than a second set temperature limit value at regular time, and if so, sending out warning information that the carbon dioxide absorbent is about to run out.
The invention has the positive progress effects that:
the invention designs a novel circulating type scuba, which has the advantages that the integrated structure design of an oxygen bottle, an oxygen generating agent tank and a carbon dioxide absorbent tank is compact, the structure design is convenient to carry, the oxygen generating agent in the oxygen generating agent tank and the carbon dioxide absorbent in the carbon dioxide absorbent tank are combined, so that the oxygen generating agent can chemically react with carbon dioxide in gas exhaled by a diver to generate oxygen, carbon dioxide which does not chemically react with the oxygen generating agent enters the carbon dioxide absorbent tank to be absorbed by the carbon dioxide absorbent, and the oxygen generated by the reaction of the carbon dioxide and the oxygen generating agent can be supplied to the diver for breathing, thereby fully utilizing the carbon dioxide; in addition, the invention can supply oxygen in the oxygen bottle, and oxygen generated by the reaction of carbon dioxide and the oxygen generating agent can also supply oxygen, thereby increasing the oxygen supply time and prolonging the underwater operation time of divers.
The invention can also detect the use condition of the oxygen generating agent in the oxygen generating agent cavity, prompt the diver when the oxygen generating agent is about to run out, and also detect the use condition of the carbon dioxide absorbent in the absorbent cavity, and prompt the diver when the carbon dioxide absorbent is about to run out.
Drawings
FIG. 1 is a schematic view of a circulating scuba gear for extending oxygen supply time according to a preferred embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, the present embodiment provides a circulating type breathing apparatus for prolonging oxygen supply time, which includes an oxygen bottle 1, a breathing mask 2, an inhalation lung bag 3, an exhalation lung bag 4 and a controller, and the improvement of the circulating type breathing apparatus for prolonging oxygen supply time of the present embodiment is that: the outer surface of the oxygen bottle 1 is fixedly provided with an inner absorbent tank body 5 and an outer oxygen generating tank body 6 in a sleeved mode from inside to outside in sequence, openings of the inner absorbent tank body 5 and the outer oxygen generating tank body 6 are downward, the bottom end of the inner absorbent tank body 5 and the bottom end of the outer oxygen generating tank body 6 are flush with the bottom end of the oxygen bottle 1, the top end of the inner absorbent tank body 5 and the top end of the outer oxygen generating tank body 6 are flush with the top end of the oxygen bottle 1, and the cross section of the integral structure formed by the oxygen bottle 1, the inner absorbent tank body 5 and the outer oxygen generating tank body 6 is rectangular.
The bottom of outer oxygen generating agent jar body 6 detachably is fixed with the cover 7 that the cross-section is the concave shape and inside is hollow structure, if the bottom and the cover 7 threaded connection of outer oxygen generating agent jar body 6, the bottom opening of the interior absorbent jar body 5 of inner bottom and the bottom opening of outer oxygen generating agent jar body 6 are sealed simultaneously to the interior bottom of cover 7. Specifically, the outer wall of the bottom of the outer oxygen generating agent tank body 6 is provided with external threads, the inner wall of the tank cover 7 is provided with internal threads, the tank cover 7 and the outer oxygen generating agent tank body 6 are fixedly connected through the cooperation of the internal threads and the external threads, and simultaneously, the bottom opening of the absorbent tank body 5 and the bottom opening of the outer oxygen generating agent tank body 6 are sealed.
The positions of the inner bottom of the tank cover 7 corresponding to the oxygen generating agent cavity 8 in the outer oxygen generating agent tank body 6 and the absorbent cavity 9 in the inner absorbent tank body 5 are porous structures, the porous structures are arranged to be only gas-permeable, but not oxygen generating agent and carbon dioxide absorbent, and the porous structures are respectively located under the oxygen generating agent cavity 8 and the absorbent cavity 9.
The oxygen bottle mouth of the oxygen bottle 1 is communicated with the air suction port of the breathing mask 2 through an air suction pipeline 10, an oxygen supply electric valve 11, a driving pump 12, a flow sensor 13, an air suction lung bag 3 and an air suction one-way valve 15 are sequentially arranged on the air suction pipeline 10, the air outlet of the breathing mask 2 is communicated with one end of an air discharge pipeline 16, two branch pipelines at the other end of the air discharge pipeline 16 are inserted at the top of an oxygen generating cavity 8 and are respectively positioned at the left side and the right side of the bottle body of the oxygen bottle 1, an air discharge one-way valve 17 and an air suction lung bag 4 are sequentially arranged on the air discharge pipeline 16, one end of an oxygen generating pipeline 19 is inserted at the top of the absorbent cavity 9 and respectively positioned at the left side and the right side of the bottle body of the oxygen bottle 1, the other end of each oxygen generating pipeline 19 is connected and communicated with the air suction pipeline 10 between the oxygen supply electric valve 11 and the driving pump 12, and an oxygen generating one-way valve 20 is arranged on each oxygen generating pipeline 19.
The principle of oxygen generation by the oxygen generating agent is as follows: the oxygen generating agent and the carbon dioxide in the exhaled air of the diver react chemically to generate oxygen, heat is generated, and the temperature rises along with the use of the oxygen generating agent, so that the use state of the oxygen generating agent can be detected by the temperature sensor.
The principle of absorbing carbon dioxide by the carbon dioxide absorbent is as follows: the carbon dioxide absorbent and carbon dioxide in the exhaled gas of the diver react chemically to generate heat, and the temperature rise is caused along with the use of the carbon dioxide absorbent, so that the use state of the carbon dioxide absorbent can be detected by the temperature sensor.
Oxygen production temperature sensors 21 are arranged below the exhalation pipelines 16 positioned at the lower part of the inner wall of the outer oxygen-generating tank body 6 and at the upper part of the oxygen-generating chamber 8, and absorption temperature sensors 22 are arranged below the oxygen production pipelines 19 positioned at the upper part of the inner wall of the inner absorbent tank body 5 and at the upper part of the absorbent chamber 9.
In addition, a baffle ring 23 coaxial with the body of the oxygen bottle 1 is fixed in the can lid 7, and the outer diameter of the baffle ring 23 is equal to the outer diameter of the body of the oxygen bottle 1, so that oxygen generated by the oxygen generator and carbon dioxide which does not react with the oxygen generator and flows out of the porous structure at the bottom of the oxygen generator cavity 8 do not diffuse in the whole can lid 7, but quickly flow into the absorber cavity 9 through the porous structure at the bottom of the absorber cavity 9.
The controller adopts STM32 series singlechip, and according to STM32 series singlechip each port pin's function, each electronic device (flow sensor 13, oxygen supply motorised valve 11, driving pump 12, oxygen production temperature sensor 21, absorption temperature sensor 22) carries out the conventional setting of electric connection with the specific which port pin of STM32 series singlechip, is the prior art.
The driving pump 12 is a commercially available micro air pump according to actual needs, the flow sensor 13 is a commercially available flow sensor, and the valves used in the present embodiment are also commercially available products.
The flow sensor 13 is used for detecting the gas flow in the inspiration line 10 and transmitting the gas flow to the controller, and the controller is used for controlling the oxygen supply electric valve 11 to be opened and the driving pump 12 to be started when the gas flow is judged to be lower than the set lower limit value, controlling the driving pump 12 to pump oxygen in the oxygen cylinder 1 and oxygen in the oxygen production line 19 to enter the breathing mask 2 for breathing by a diver, and controlling the oxygen supply electric valve 11 to be closed and the driving pump 12 to be suspended when the gas flow is judged to reach the set upper limit value.
Each oxygen generating temperature sensor 21 is used for detecting the temperature of the position of the oxygen generating agent cavity 8 at regular time as an oxygen generating temperature value, and the controller is used for judging whether the average value of the oxygen generating temperature values is larger than a first set temperature limit value at regular time, and if so, sending out warning information that the oxygen generating agent is about to run out, and reminding divers in time.
Each absorption temperature sensor 22 is used for detecting the temperature of the position of the absorber cavity 9 at regular time as an absorption temperature value; the controller is used for judging whether the average value of the absorption temperature values is larger than a second set temperature limit value or not at regular time, and if so, sending out warning information that the carbon dioxide absorbent is about to run out, and reminding divers in time.
The diver inhales and exhales through the breathing mask 2, and the inhalation check valve 15 and the exhalation check valve 17 ensure a one-way flow of gas in the circuit. When the diver exhales (i.e. exhales), the gas exhaled by the diver enters the exhalation lung 4 via the exhalation check valve 17. When a diver inhales, the gas in the expiratory lung 4 is inhaled into the oxygen-generating chamber 8, wherein the carbon dioxide and the oxygen-generating agent in the oxygen-generating chamber 8 are subjected to chemical oxygen generation, the generated oxygen and the unreacted carbon dioxide flow into the absorbent chamber 9 through the porous structure at the bottom of the oxygen-generating chamber 8 and the porous structure at the bottom of the absorbent chamber 9, the unreacted carbon dioxide is absorbed by the carbon dioxide absorbent in the absorbent chamber 9, and then the generated oxygen flows into the inspiratory pipeline 10 through each oxygen-generating pipeline 19 under the action of the inspiratory effort of the diver and the pump force of the driving pump 12 and enters the inspiratory lung 3, and then enters the breathing mask 2 through the inspiratory pipeline 10 and finally enters the diver mouth for breathing of the diver.
The flow sensor 13 detects the gas flow in the air suction pipeline 10, the controller opens the oxygen supply electric valve 11 when the gas flow is lower than a set lower limit value, and drives the pump 12 to pump oxygen in the oxygen bottle 1 and oxygen in the oxygen production pipeline 19, so that the oxygen enters the breathing mask 2 through the air suction pulmonary bag 3 for breathing by a diver; when the gas flow reaches the set upper limit value, the controller indicates that the oxygen in the air suction pipeline 10 is very sufficient, closes the oxygen supply electric valve 11, and drives the pump 12 to stop working.
The other end two branches of the expiration pipeline 16 are inserted at the top of the oxygen generating agent cavity 8 and are respectively positioned at the left side and the right side of the bottle body of the oxygen bottle 1, and the arrangement ensures that carbon dioxide in the expiration pipeline 16 can react with more contact of the oxygen generating agent in the oxygen generating agent cavity 8, so that the oxygen generating agent is utilized more fully.
The top of the absorbent cavity 9 is respectively provided with one end of an oxygen production pipeline 19 which is inserted at the left side and the right side of the bottle body of the oxygen bottle 1, and the arrangement ensures that oxygen at the left side and the right side of the absorbent cavity 9 can enter the oxygen production pipeline 19 for breathing of divers.
When the oxygen generating agent in the oxygen generating agent cavity 8 and the carbon dioxide absorbent in the absorbent cavity 9 need to be replaced after being used for a period of time, the tank cover 7 is rotated, the bottoms of the absorbent tank body 5 and the outer oxygen generating agent tank body 6 are opened, the used oxygen generating agent and carbon dioxide absorbent are poured out, the new oxygen generating agent and carbon dioxide absorbent are replaced, and the tank cover 7 is covered to seal the bottom openings of the absorbent tank body 5 and the outer oxygen generating agent tank body 6.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that these are by way of example only, and the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the invention, but such changes and modifications fall within the scope of the invention.
Claims (6)
1. The circulating type diving breathing apparatus for prolonging the oxygen supply time comprises an oxygen bottle, a breathing mask, an inspiration lung bag, an expiration lung bag and a controller, and is characterized in that the outer surface of the bottle of the oxygen bottle is sequentially sleeved with an inner absorbent tank and an outer oxygen-generating tank from inside to outside in a coaxial manner, the openings of the inner absorbent tank and the outer oxygen-generating tank are downward, the bottom end of the inner absorbent tank and the bottom end of the outer oxygen-generating tank are flush with the bottom end of the bottle, the bottom of the outer oxygen-generating tank is detachably fixed with a tank cover with a concave section and a hollow structure inside, the bottom opening of the inner absorbent tank and the bottom opening of the outer oxygen-generating tank are simultaneously sealed, the positions of the inner bottom of the tank cover corresponding to the positions of an oxygen-generating cavity in the outer oxygen-generating tank and an oxygen-generating cavity in the inner absorbent tank are porous structures, the porous structures are arranged to be only gas-permeable, the oxygen mask of the inner absorbent tank is communicated with the oxygen supply pipeline through a circuit, the inspiration valve is arranged at the top of an air suction pipe, the inspiration lung valve is arranged at the top of the air suction pipe, the inspiration valve is arranged at the top of the air suction pipe is connected with the air supply pipeline, the inspiration valve is arranged at the top of the air suction pipe is connected with the breathing valve, the breathing valve is arranged at the top of the breathing valve, the breathing valve is connected with the breathing valve, the breathing valve is arranged at the top of the breathing valve is connected with the breathing valve, and the breathing valve is connected with the breathing valve through the breathing valve, each oxygen production pipeline is provided with an oxygen production one-way valve;
oxygen production temperature sensors are arranged below the exhalation pipelines positioned at the upper parts of the oxygen production cavities and the lower parts of the inner walls of the outer oxygen production agent tank bodies, and absorption temperature sensors are arranged below the oxygen production pipelines positioned at the upper parts of the absorbent cavities and the upper parts of the inner absorbent tank bodies;
the flow sensor is used for detecting the gas flow in the air suction pipeline and transmitting the gas flow to the controller, and the controller is used for controlling the opening of the oxygen supply electric valve and the starting of the driving pump when the gas flow is judged to be lower than the set lower limit value, controlling the driving pump to pump oxygen in the oxygen cylinder and oxygen in the oxygen production pipeline to enter the breathing mask for breathing by a diver, and controlling the closing of the oxygen supply electric valve and the suspension of the driving pump when the gas flow is judged to reach the set upper limit value;
each oxygen generating temperature sensor is used for detecting the temperature of the position of the oxygen generating agent cavity at regular time to serve as an oxygen generating temperature value, the controller is used for judging whether the average value of the oxygen generating temperature values is larger than a first set temperature limit value at regular time, and if so, warning information that the oxygen generating agent is about to run out is sent out; each absorption temperature sensor is used for detecting the temperature of the position of the absorber cavity at regular time as an absorption temperature value; the controller is used for judging whether the average value of the absorption temperature values is larger than a second set temperature limit value at regular time, and if so, sending out warning information that the carbon dioxide absorbent is about to run out.
2. The scuba for prolonging oxygen supply time according to claim 1, wherein the top end of the inner absorbent tank and the top end of the outer oxygen generator tank are flush with the top end of the bottle, and the cross section of the overall structure of the bottle, the inner absorbent tank and the outer oxygen generator tank is rectangular.
3. The scuba for prolonging the oxygen supply time according to claim 1, wherein a baffle ring coaxial with the bottle body is fixed in the tank cover, and the outer diameter of the baffle ring is equal to the outer diameter of the bottle body.
4. The scuba for prolonging oxygen supply time according to claim 1, wherein the bottom of the outer oxygen-generating tank is threadably connected to the tank cover.
5. The scuba for prolonged oxygen supply of claim 1 wherein the drive pump is a miniature air pump.
6. A circulating type scuba for prolonging the oxygen supply time as claimed in claim 1, wherein the controller employs STM32 series single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311352627.9A CN117184372A (en) | 2023-10-18 | 2023-10-18 | Circulating type scuba for prolonging oxygen supply time |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311352627.9A CN117184372A (en) | 2023-10-18 | 2023-10-18 | Circulating type scuba for prolonging oxygen supply time |
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| Publication Number | Publication Date |
|---|---|
| CN117184372A true CN117184372A (en) | 2023-12-08 |
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ID=88988862
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311352627.9A Pending CN117184372A (en) | 2023-10-18 | 2023-10-18 | Circulating type scuba for prolonging oxygen supply time |
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