Method and system for producing variable oxygen concentration gas

Abstract

The application provides a variable oxygen concentration gas preparation method and system, which is characterized in that the method is applied to a variable oxygen concentration gas preparation device comprising a nitrogen-oxygen mixing device, the nitrogen-oxygen mixing device has an oxygen channel, an air channel and a plurality of nitrogen channels; the method comprises the following steps: obtaining air, oxygen-containing gas with a preset oxygen concentration and nitrogen-containing gas with a preset nitrogen concentration; connecting the air channel with the air, connecting the oxygen channel with the oxygen-containing gas, and connecting the plurality of nitrogen channels with the nitrogen-containing gas; and performing on-off combination control between the air channel, the oxygen channel and the plurality of nitrogen channels to alternately output mixed gas with an oxygen concentration higher than 21% and mixed gas with an oxygen concentration lower than 21%. Compared with the prior art, the application can quickly and conveniently obtain mixed gas with different oxygen concentrations, accurately control low-oxygen gas and high-oxygen gas and accurately and flexibly switch the low-oxygen gas and the high-oxygen gas, and can flexibly adapt to different needs of users.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas transmission, in particular to a variable oxygen concentration gas preparation method and system. BACKGROUND

[0002] At present, high and low oxygen training is proved by medicine and physiology to have obvious improvement effect on hypertension, high blood fat, arteriosclerosis, myocardial function, hematopoietic capacity and human brain cognition of part of the population, and can be used to improve human function, enhance the immune system, non-specific compensation ability and aerobic output of human body.

[0003] The gas equipment in the prior art can only output gas with a single specification of oxygen concentration. When multiple specifications of oxygen concentration gas need to be prepared, multiple specifications of gas preparation equipment are usually used in cooperation, so that the device structure is complex, the volume is large, the power consumption is increased, the energy consumption is high, the complexity of maintenance and management is increased, and the user experience is poor. SUMMARY

[0004] In order to overcome the shortcomings of the prior art, the present application provides a variable oxygen concentration gas preparation method and system, and the specific technical solutions are as follows:

[0005] The variable oxygen concentration gas preparation method is applied to a variable oxygen concentration gas preparation equipment including a nitrogen-oxygen mixing device, and the nitrogen-oxygen mixing device has an oxygen passage, an air passage and a plurality of nitrogen passages.

[0006] Air, oxygen-containing gas with a preset oxygen concentration and nitrogen-containing gas with a preset nitrogen concentration are obtained.

[0007] The air passage is connected with the air, the oxygen passage is connected with the oxygen-containing gas, and the plurality of nitrogen passages are connected with the nitrogen-containing gas.

[0008] The air passage, the oxygen passage and the plurality of nitrogen passages are controlled by switching combination to alternately output mixed gas with oxygen concentration higher than 21% and mixed gas with oxygen concentration lower than 21%.

[0009] In one specific embodiment, the plurality of nitrogen passages includes a first nitrogen passage, a second nitrogen passage and a third nitrogen passage, and the first nitrogen passage, the second nitrogen passage and the third nitrogen passage are respectively connected with the nitrogen-containing gas.

[0010] opening the first nitrogen channel and the air channel, and closing the oxygen channel, the second nitrogen channel and the third nitrogen channel to output the mixed gas with an oxygen concentration of 10%-12%.

[0011] In one specific embodiment, the second nitrogen channel has an inner diameter of 1.5mm-3mm; the "mixed gas with an oxygen concentration lower than 21%" further includes:

[0012] opening the second nitrogen channel and the air channel, and closing the oxygen channel, the first nitrogen channel and the third nitrogen channel to output the mixed gas with an oxygen concentration of 12%-14%.

[0013] In one specific embodiment, the third nitrogen channel has an inner diameter of 0.5mm-1.5mm; the "mixed gas with an oxygen concentration lower than 21%" further includes:

[0014] opening the third nitrogen channel and the air channel, and closing the oxygen channel, the first nitrogen channel and the second nitrogen channel to output the mixed gas with an oxygen concentration of 14%-16%.

[0015] In one specific embodiment, the "mixed gas with an oxygen concentration lower than 21%" further includes:

[0016] opening the air channel, and closing the oxygen channel and the plurality of nitrogen channels to output the mixed gas with an oxygen concentration of 16%-21%.

[0017] In one specific embodiment, the "mixed gas with an oxygen concentration higher than 21%" includes:

[0018] opening the oxygen channel, and closing the air channel and the plurality of nitrogen channels to output the mixed gas with an oxygen concentration higher than 21%.

[0019] In one specific embodiment, further comprising:

[0020] monitoring the heart rate variation of the user during the time period of alternately outputting the mixed gas with an oxygen concentration higher than 21% and the mixed gas with an oxygen concentration lower than 21%;

[0021] if the heart rate variation of the user exceeds a preset heart rate threshold, closing the oxygen channel, the air channel and the plurality of nitrogen channels.

[0022] In one specific embodiment, further comprising:

[0023] during the time period of alternately outputting the mixed gas with an oxygen concentration higher than 21% and the mixed gas with an oxygen concentration lower than 21%:

[0024] if the time of outputting the mixed gas with an oxygen concentration lower than 21% is greater than a first preset time length, then start outputting the mixed gas with an oxygen concentration higher than 21%;

[0025] if the time of outputting the mixed gas with an oxygen concentration higher than 21% is greater than a second preset time length, then close the oxygen channel, the air channel and the plurality of nitrogen channels.

[0026] In one specific embodiment, a first electromagnetic on-off valve is arranged on the oxygen channel, a second electromagnetic on-off valve is arranged on each of the nitrogen channels, and a third electromagnetic on-off valve is arranged on the air channel.

[0027] The first electromagnetic on-off valve is used to output or stop outputting the oxygen-containing gas in the oxygen channel.

[0028] The second electromagnetic on-off valve is used to output or stop outputting the nitrogen-containing gas in the corresponding nitrogen channel.

[0029] The third electromagnetic on-off valve is used to output or stop outputting the air in the air channel.

[0030] In one specific embodiment, a variable oxygen concentration gas preparation system is also provided for performing the above-mentioned variable oxygen concentration gas preparation method, comprising:

[0031] an acquisition module for acquiring air, oxygen-containing gas with a preset oxygen concentration and nitrogen-containing gas with a preset nitrogen concentration;

[0032] a docking module for docking the air channel with the air, docking the oxygen channel with the oxygen-containing gas and docking the plurality of nitrogen channels with the nitrogen-containing gas;

[0033] a mixing module for switch combination control between the air channel, the oxygen channel and the plurality of nitrogen channels to alternately output mixed gas with an oxygen concentration higher than 21% and mixed gas with an oxygen concentration lower than 21%.

[0034] Compared with the prior art, the present application has the following beneficial effects:

[0035] The variable oxygen concentration gas preparation method and system provided by the present application can quickly and conveniently obtain mixed gas with different oxygen concentrations, accurately control and precisely and flexibly switch low-oxygen gas and high-oxygen gas, flexibly adapt to different needs of users and improve the use experience of users.

[0036] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be considered as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative effort based on these drawings.

[0038] Figure 1 is a structural block diagram of the variable oxygen concentration gas preparation device in the embodiment;

[0039] Figure 2 is a structural schematic diagram of the nitrogen-oxygen mixing device in the embodiment;

[0040] Figure 3 is a flow step diagram of the variable oxygen concentration gas preparation method in the embodiment;

[0041] Figure 4 is a flow step diagram of the mixed gas with an oxygen concentration of 10%-12% output in the embodiment;

[0042] Figure 5 is a flow step diagram of the mixed gas with an oxygen concentration of 12%-14% output in the embodiment;

[0043] Figure 6 is a flow step diagram of the mixed gas with an oxygen concentration of 14%-16% output in the embodiment;

[0044] Figure 7 is a flow step diagram of the mixed gas with an oxygen concentration of 16%-21% output in the embodiment;

[0045] Figure 8 is a flow step diagram of the mixed gas with an oxygen concentration higher than 21% output in the embodiment;

[0046] Figure 9 is a flow schematic diagram of the variable oxygen concentration gas preparation system in the embodiment.

[0047] Main element symbol explanation:

[0048] 1-nitrogen-oxygen mixing device; 2-oxygen passage; 3-air passage; 4-gas preparation device; 5-air compression device; 6-oxygen outlet; 7-nitrogen outlet; 8-mixing cavity; 9-first nitrogen passage; 10-second nitrogen passage; 11-third nitrogen passage; 12-first electromagnetic switch valve; 13-second electromagnetic switch valve; 14-third electromagnetic switch valve; 15-first gas pipeline; 16-second gas pipeline; 17-gas outlet. DETAILED DESCRIPTION

[0049] Embodiment

[0050] As Figures 1-8 shown, the embodiment provides a variable oxygen concentration gas production method, which is applied to a variable oxygen concentration gas production device including a nitrogen-oxygen mixing device 1, the nitrogen-oxygen mixing device 1 has an oxygen passage 2, an air passage 3 and a plurality of nitrogen passages; specifically, the number of nitrogen passages can be selected to be 3 or more than 2; the variable oxygen concentration gas production method specifically includes:

[0051] obtaining external air, oxygen-containing gas with a preset oxygen concentration and nitrogen-containing gas with a preset nitrogen concentration; specifically, the external air is obtained through the air passage 3, the oxygen-containing gas with a preset oxygen concentration is obtained through the oxygen passage 2, and the nitrogen-containing gas with a preset nitrogen concentration is obtained through the plurality of nitrogen passages;

[0052] connecting the air passage 3 with the air, connecting the oxygen passage 2 with the oxygen-containing gas, and connecting the plurality of nitrogen passages with the nitrogen-containing gas;

[0053] controlling the switching combination between the air passage 3, the oxygen passage 2 and the plurality of nitrogen passages to alternately output mixed gas with an oxygen concentration higher than 21% and mixed gas with an oxygen concentration lower than 21%.

[0054] Specifically, the variable oxygen concentration gas production device further includes a gas preparation device 4 and an air compression device 5, the air compression device 5 is connected to the gas preparation device 4 for inputting compressed gas to the gas preparation device 4, the gas preparation device 4 is connected to the nitrogen-oxygen mixing device 1 and the air compression device 5 for receiving the compressed gas transmitted by the air compression device 5 and generating the oxygen-containing gas with a preset oxygen concentration through the oxygen passage 2 into the mixing chamber 8 and generating the nitrogen-containing gas with a preset nitrogen concentration through the nitrogen passage into the mixing chamber 8; the gas preparation device 4 can optionally have an oxygen outlet 6 and a nitrogen outlet 7, the oxygen outlet 6 can be connected to the oxygen passage 2 through a first gas pipeline 15, that is, one end of the first gas pipeline 15 is connected to the oxygen outlet 6 and the other end of the first gas pipeline 15 is connected to the oxygen passage 2; the nitrogen outlet 7 can be connected to the nitrogen passage through a second gas pipeline 16, that is, one end of the second gas pipeline 16 is connected to the nitrogen outlet 7 and the other end of the second gas pipeline 16 is connected to the nitrogen passage; the oxygen-containing gas with a preset oxygen concentration generated by the gas preparation device 4 is output to the oxygen passage 2 through the oxygen outlet 6, and the nitrogen-containing gas with a preset nitrogen concentration generated by the gas preparation device 4 is output to the nitrogen passage through the nitrogen outlet 7. The gas preparation device 4 can be a molecular sieve oxygen preparation system, the specific structure of the molecular sieve oxygen preparation system can be realized by the prior art, and the embodiment will not be described again; the air compression device 5 can be an air compressor, and the specific structure of the air compressor can be realized by the prior art, and the embodiment will not be described again.

[0055] Specifically, the nitrogen-oxygen mixing device 1 further has a mixing cavity 8, the air channel 3, the oxygen channel 2 and the plurality of nitrogen channels are respectively communicated with the mixing cavity 8; when the air channel 3 is opened, the external air can be input into the mixing cavity 8 through the air channel 3; when the oxygen channel 2 is opened, the oxygen-containing gas with a preset oxygen concentration can be input into the mixing cavity 8 through the oxygen channel 2; when the plurality of nitrogen channels are opened, the nitrogen-containing gas with a preset nitrogen concentration can be input into the mixing cavity 8 through the corresponding nitrogen channel.

[0056] Optionally, the embodiment has the advantages of simple structure, small volume, reduced power consumption, low energy consumption, convenient maintenance and management, quick and convenient obtaining of mixed gas with different oxygen concentrations, accurate control and precise and flexible switching of low-oxygen gas and high-oxygen gas, flexible adaptation to different needs of users, convenient use of users and improved use experience of users.

[0057] In the embodiment, the plurality of nitrogen channels include a first nitrogen channel 9, a second nitrogen channel 10 and a third nitrogen channel 11, and the first nitrogen channel 9, the second nitrogen channel 10 and the third nitrogen channel 11 are respectively connected with the nitrogen-containing gas; the "mixed gas with an oxygen concentration lower than 21%" includes:

[0058] The first nitrogen channel 9 and the air channel 3 are opened, and the oxygen channel 2, the second nitrogen channel 10 and the third nitrogen channel 11 are closed, so that the air can be transmitted into the mixing cavity 8 through the air channel 3, the air channel 3 can output the air, the nitrogen-containing gas with a preset nitrogen concentration can be output only through the first nitrogen channel 9, the nitrogen-containing gas with a preset nitrogen concentration in the first nitrogen channel 9 can be transmitted into the mixing cavity 8, the second nitrogen channel 10 and the third nitrogen channel 11 cannot output the nitrogen-containing gas, the oxygen channel 2 cannot output the oxygen-containing gas, and the oxygen-containing gas cannot be output through the oxygen channel 2, so as to obtain the mixed gas with an oxygen concentration of 10%-12%.

[0059] Optionally, the inner diameters of the first nitrogen channel 9, the second nitrogen channel 10 and the third nitrogen channel 11 can be selected to be different, the inner diameter of the first nitrogen channel 9 can be selected to be 3mm-4.5mm, the inner diameter of the second nitrogen channel 10 can be selected to be 1.5mm-3mm, and the inner diameter of the third nitrogen channel 11 can be selected to be 0.5mm-1.5mm.

[0060] In the embodiment, the inner diameter of the second nitrogen channel 10 is 1.5mm-3mm, and the inner diameter of the second nitrogen channel 10 can be selected to be 1.5mm; the "mixed gas with an oxygen concentration lower than 21%" further includes:

[0061] The second nitrogen passage 10 and the air passage 3 are opened, and the oxygen passage 2, the first nitrogen passage 9 and the third nitrogen passage 11 are closed, so that the external air can be transmitted into the mixing cavity 8 through the air passage 3, and the nitrogen-containing gas with the preset nitrogen concentration can be transmitted into the mixing cavity 8 only through the second nitrogen passage 10, that is, the nitrogen-containing gas with the preset nitrogen concentration in the second nitrogen passage 10 can be transmitted into the mixing cavity 8, the oxygen-containing gas with the preset oxygen concentration cannot be input into the mixing cavity 8 through the oxygen passage 2, and the nitrogen-containing gas with the preset nitrogen concentration in the first nitrogen passage 9 and the third nitrogen passage 11 cannot be transmitted into the mixing cavity 8, so as to obtain the mixed gas with the oxygen concentration of 12%-14%.

[0062] In the embodiment, the inner diameter of the third nitrogen passage 11 is 0.5mm-1.5mm, and the inner diameter of the third nitrogen passage 11 can be 1.2mm in particular.

[0063] The third nitrogen passage 11 and the air passage 3 are opened, and the oxygen passage 2, the first nitrogen passage 9 and the second nitrogen passage 10 are closed, so that the external air can be transmitted into the mixing cavity 8 through the air passage 3, and the nitrogen-containing gas with the preset nitrogen concentration can be transmitted into the mixing cavity 8 only through the third nitrogen passage 11, that is, the nitrogen-containing gas with the preset nitrogen concentration in the third nitrogen passage 11 can be transmitted into the mixing cavity 8, the oxygen-containing gas with the preset oxygen concentration cannot be transmitted into the mixing cavity 8 through the oxygen passage 2, and the nitrogen-containing gas with the preset nitrogen concentration in the first nitrogen passage 9 and the second nitrogen passage 10 cannot be input into the mixing cavity 8, so as to obtain the mixed gas with the oxygen concentration of 14%-16%.

[0064] In the embodiment, the mixed gas with the oxygen concentration lower than 21% further includes:

[0065] The air passage 3 is opened, and the oxygen passage 2 and the plurality of nitrogen passages are closed, so as to output the mixed gas with the oxygen concentration of 16%-21%; specifically, the air passage 3 is opened, and the oxygen passage 2, the first nitrogen passage 9, the second nitrogen passage 10 and the third nitrogen passage 11 are closed, so that only the external air is input into the mixing cavity 8 through the air passage 3, so as to obtain the mixed gas with the oxygen concentration of 16%-21%.

[0066] In the embodiment, the gas with the oxygen concentration higher than 21% includes:

[0067] The oxygen passage 2 is opened, and the air passage 3 and the plurality of nitrogen passages are closed, so as to output the mixed gas with the oxygen concentration higher than 21%; specifically, the oxygen passage 2 is opened, and the air passage 3, the first nitrogen passage 9, the second nitrogen passage 10 and the third nitrogen passage 11 are closed, so that only the oxygen-containing gas with the preset oxygen concentration is input into the mixing cavity 8 through the oxygen passage 2, so as to obtain the mixed gas with the oxygen concentration higher than 21%.

[0068] In this embodiment, it also includes:

[0069] In the period of alternately outputting the mixed gas with the oxygen concentration higher than 21% and the mixed gas with the oxygen concentration lower than 21%, the change of the heart rate of the user is monitored at all times;

[0070] If the change of the heart rate of the user exceeds the preset heart rate threshold, the oxygen passage 2, the air passage 3 and the plurality of nitrogen passages are closed;

[0071] Specifically, if the change of the heart rate of the user exceeds 80%, the oxygen passage 2, the air passage 3 and the plurality of nitrogen passages are directly closed, i.e. the training is directly ended, no matter which stage the user is in, i.e. no matter whether the user is in the period of outputting the mixed gas with the oxygen concentration higher than 21% or the period of outputting the mixed gas with the oxygen concentration lower than 21%; for example, at the beginning of the training, the heart rate of the user is 80, if the heart rate of the user is greater than 144 (80+80x80%) during the training, i.e. in the period of alternately outputting the mixed gas with the oxygen concentration higher than 21% and the mixed gas with the oxygen concentration lower than 21%, it is considered that the user is not suitable for training, the oxygen passage 2, the air passage 3 and the plurality of nitrogen passages should be directly closed, i.e. the training is directly ended, and a voice prompt is performed at the same time.

[0072] In this embodiment, it also includes:

[0073] In the period of alternately outputting the mixed gas with the oxygen concentration higher than 21% and the mixed gas with the oxygen concentration lower than 21%:

[0074] If the time of outputting the mixed gas with the oxygen concentration lower than 21% is greater than the first preset time length, the mixed gas with the oxygen concentration higher than 21% is started to be output;

[0075] If the time of outputting the mixed gas with the oxygen concentration higher than 21% is greater than the second preset time length, the oxygen passage 2, the air passage 3 and the plurality of nitrogen passages are closed.

[0076] Specifically, the first preset time length can be selected to include 1 minute, 2 minutes, 3 minutes, 4 minutes or 5 minutes, etc., and the second preset time length can be selected to include 1 minute, 2 minutes, 3 minutes, 4 minutes or 5 minutes, etc., in this embodiment, the first preset time length can be selected to be 5 minutes, and the second preset time length can be selected to be 5 minutes.

[0077] During the period of alternating output of mixed gas with oxygen concentration above 21% and mixed gas with oxygen concentration below 21%: if the time of outputting mixed gas with oxygen concentration below 21% is longer than 5 minutes, then the output of mixed gas with oxygen concentration above 21% will begin; if the time of outputting mixed gas with oxygen concentration above 21% is longer than 5 minutes, then oxygen channel 2, air channel 3 and multiple nitrogen channels will be directly closed, that is, the training will end directly.

[0078] In this embodiment, a first electromagnetic switch valve 12 is provided on the oxygen channel 2, a second electromagnetic switch valve 13 is provided on each nitrogen channel, and a third electromagnetic switch valve 14 is provided on the air channel 3; the first electromagnetic switch valve 12 is used to output or stop the output of oxygen-containing gas in the oxygen channel 2; the second electromagnetic switch valve 13 is used to output or stop the output of nitrogen-containing gas in the corresponding nitrogen channel; and the third electromagnetic switch valve 14 is used to output or stop the output of air in the air channel 3.

[0079] Specifically, when the first electromagnetic switch valve 12 is opened, oxygen-containing gas with a preset oxygen concentration can be transmitted to the mixing chamber 8 through the oxygen channel 2, that is, oxygen-containing gas with a preset oxygen concentration in the oxygen channel 2 can be output to the mixing chamber 8; when the first electromagnetic switch valve 12 is closed, oxygen-containing gas with a preset oxygen concentration cannot be transmitted to the mixing chamber 8 through the oxygen channel 2, that is, oxygen-containing gas with a preset oxygen concentration in the oxygen channel 2 stops being output to the mixing chamber 8. When the second electromagnetic switch valve 13 is opened, nitrogen-containing gas with a preset nitrogen concentration can be transmitted to the mixing chamber 8 through the corresponding nitrogen channel, that is, nitrogen-containing gas with a preset nitrogen concentration in the nitrogen channel can be output to the mixing chamber 8; when the second electromagnetic switch valve 13 is closed, nitrogen-containing gas with a preset nitrogen concentration cannot be transmitted to the mixing chamber 8 through the corresponding nitrogen channel, that is, nitrogen-containing gas with a preset nitrogen concentration in the nitrogen channel stops being output to the mixing chamber 8. When the third electromagnetic switch valve 14 is opened, external air can be transmitted to the mixing chamber 8 through the air channel 3, that is, the air in the air channel 3 can be output to the mixing chamber 8; when the third electromagnetic switch valve 14 is closed, external air cannot be transmitted to the mixing chamber 8 through the air channel 3, that is, the air in the air channel 3 stops being output to the mixing chamber 8.

[0080] Specifically, in this embodiment, the nitrogen-oxygen mixing device 1 also has an outlet 17, which is specifically connected to the mixing chamber 8 and is used to output a mixed gas with an oxygen concentration higher than 21% in the mixing chamber 8 or to output a mixed gas with an oxygen concentration lower than 21% in the mixing chamber 8.

[0081] like Figure 9 As shown, in this embodiment, a variable oxygen concentration gas production system is also provided for performing the above-described variable oxygen concentration gas production method, including:

[0082] An acquisition module is configured to acquire air, oxygen-containing gas with a preset oxygen concentration, and nitrogen-containing gas with a preset nitrogen concentration.

[0083] A docking module is configured to dock the air channel 3 with air, dock the oxygen channel 2 with the oxygen-containing gas, and dock the plurality of nitrogen channels with the nitrogen-containing gas.

[0084] A mixing module is configured to perform on-off combination control among the air channel 3, the oxygen channel 2, and the plurality of nitrogen channels, so as to alternately output mixed gas with an oxygen concentration higher than 21% and output mixed gas with an oxygen concentration lower than 21%.

[0085] Specifically, the oxygen content of the earth's surface is about 21%, that is, the oxygen content in the air is about 21%, and the oxygen concentration of 21% in nature, that is, the oxygen content of 21% just allows oxygen to have no harm to mammals, which is a balanced state between the human body and oxygen.

[0086] Compared with the prior art, the variable oxygen concentration gas preparation method and system provided by the embodiment have simple structure, small volume, reduced power consumption, low energy consumption, convenient maintenance and management, and can quickly and conveniently obtain mixed gas with different oxygen concentrations, accurately control and accurately and flexibly switch low-oxygen gas and high-oxygen gas, flexibly adapt to different needs of users, facilitate use of users, and improve user experience.

[0087] Those skilled in the art can understand that the accompanying drawings are only schematic diagrams of a preferred implementation scenario, and the modules or processes in the drawings are not necessarily necessary for implementing the present application.

[0088] Those skilled in the art can understand that the modules in the device in the implementation scenario can be distributed in the device in the implementation scenario according to the description of the implementation scenario, or can be changed and located in one or more devices different from the implementation scenario. The modules of the above implementation scenario can be combined into one module, or can be further split into a plurality of sub-modules.

[0089] The above-mentioned serial numbers of the present application are only for description, and do not represent the advantages and disadvantages of the implementation scenario.

[0090] The above disclosure is only a few specific implementation scenarios of the present application, but the present application is not limited thereto, and any changes that can be thought of by those skilled in the art should fall within the protection scope of the present application.

Claims

1. A method of producing a variable oxygen concentration gas, characterized by, The application is applied to a variable oxygen concentration gas preparation device including a nitrogen-oxygen mixing device, the nitrogen-oxygen mixing device has an oxygen channel, an air channel and a plurality of nitrogen channels, the plurality of nitrogen channels include a first nitrogen channel, a second nitrogen channel and a third nitrogen channel, the inner diameter of the second nitrogen channel is 1.5mm-3mm, the inner diameter of the third nitrogen channel is 0.5mm-1.5mm; the variable oxygen concentration gas preparation method includes: obtaining air, oxygen-containing gas with a preset oxygen concentration and nitrogen-containing gas with a preset nitrogen concentration; connecting the air channel with the air, connecting the oxygen channel with the oxygen-containing gas, and connecting the first nitrogen channel, the second nitrogen channel and the third nitrogen channel with the nitrogen-containing gas respectively; controlling the switching combination of the air channel, the oxygen channel and the plurality of nitrogen channels to alternately output mixed gas with an oxygen concentration higher than 21% and mixed gas with an oxygen concentration lower than 21%; wherein the mixed gas with an oxygen concentration lower than 21% includes: opening the first nitrogen channel and the air channel, and closing the oxygen channel, the second nitrogen channel and the third nitrogen channel to output the mixed gas with an oxygen concentration of 10%-12%; opening the second nitrogen channel and the air channel, and closing the oxygen channel, the first nitrogen channel and the third nitrogen channel to output the mixed gas with an oxygen concentration of 12%-14%; opening the third nitrogen channel and the air channel, and closing the oxygen channel, the first nitrogen channel and the second nitrogen channel to output the mixed gas with an oxygen concentration of 14%-16%.

2. The variable-oxygen-concentration gas generation method according to claim 1, characterized by, the "mixed gas with an oxygen concentration lower than 21%" also includes: opening the air channel, and closing the oxygen channel and the plurality of nitrogen channels to output the mixed gas with an oxygen concentration of 16%-21%.

3. The method of claim 1, wherein the method is a method of producing a variable oxygen concentration gas. the "mixed gas with an oxygen concentration higher than 21%" includes: opening the oxygen channel, and closing the air channel and the plurality of nitrogen channels to output the mixed gas with an oxygen concentration higher than 21%.

4. The method of claim 1, wherein the method is a method of producing a variable oxygen concentration gas. further including: monitoring the heart rate change of a user during the period of alternately outputting the mixed gas with an oxygen concentration higher than 21% and the mixed gas with an oxygen concentration lower than 21%; if the heart rate change of the user exceeds a preset heart rate threshold, closing the oxygen channel, the air channel and the plurality of nitrogen channels.

5. The method of claim 1, wherein the method is a method of producing a variable oxygen concentration gas. further including: during the period of alternately outputting the mixed gas with an oxygen concentration higher than 21% and the mixed gas with an oxygen concentration lower than 21%: if the time of outputting the mixed gas with an oxygen concentration lower than 21% is greater than a first preset time length, starting to output the mixed gas with an oxygen concentration higher than 21%; if the time of outputting the mixed gas with an oxygen concentration higher than 21% is greater than a second preset time length, closing the oxygen channel, the air channel and the plurality of nitrogen channels.

6. The variable oxygen concentration gas preparation method according to claim 1, characterized in that: A first electromagnetic switch valve is arranged on the oxygen channel, a second electromagnetic switch valve is arranged on each of the nitrogen channels, and a third electromagnetic switch valve is arranged on the air channel; The first electromagnetic switch valve is used to output or stop outputting the oxygen-containing gas in the oxygen channel; The second electromagnetic switch valve is used to output or stop outputting the nitrogen-containing gas in the corresponding nitrogen channel; The third electromagnetic switch valve is used to output or stop outputting the air in the air channel.

7. A variable oxygen concentration gas production system for carrying out the variable oxygen concentration gas production method according to any one of claims 1 to 6, characterized by, The variable-oxygen-concentration gas preparation system comprises: An acquisition module is configured to acquire air, oxygen-containing gas with a preset oxygen concentration, and nitrogen-containing gas with a preset nitrogen concentration; A docking module is configured to dock the air channel with the air, dock the oxygen channel with the oxygen-containing gas, and dock a plurality of the nitrogen channels with the nitrogen-containing gas; A mixing module is configured to perform on-off combination control among the air channel, the oxygen channel, and the plurality of nitrogen channels, so as to alternately output mixed gas with an oxygen concentration higher than 21% and output mixed gas with an oxygen concentration lower than 21%.

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