CN117797597B - High-efficiency molecular sieve oxygen generation system based on normally closed reversing valve - Google Patents
High-efficiency molecular sieve oxygen generation system based on normally closed reversing valve Download PDFInfo
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 315
- 239000001301 oxygen Substances 0.000 title claims abstract description 315
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 315
- 239000002808 molecular sieve Substances 0.000 title claims abstract description 77
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 title claims abstract description 77
- 238000004519 manufacturing process Methods 0.000 claims abstract description 46
- 230000001105 regulatory effect Effects 0.000 claims abstract description 35
- 230000001276 controlling effect Effects 0.000 claims abstract description 17
- 239000003570 air Substances 0.000 claims description 166
- 238000002640 oxygen therapy Methods 0.000 claims description 51
- 238000001179 sorption measurement Methods 0.000 claims description 46
- 230000006835 compression Effects 0.000 claims description 28
- 238000007906 compression Methods 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 25
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 24
- 230000008929 regeneration Effects 0.000 claims description 23
- 238000011069 regeneration method Methods 0.000 claims description 23
- 238000004364 calculation method Methods 0.000 claims description 21
- 239000012535 impurity Substances 0.000 claims description 15
- 239000007789 gas Substances 0.000 claims description 14
- 244000145841 kine Species 0.000 claims description 12
- 229910052757 nitrogen Inorganic materials 0.000 claims description 12
- 238000000746 purification Methods 0.000 claims description 7
- 239000012080 ambient air Substances 0.000 claims description 6
- 239000004519 grease Substances 0.000 claims description 3
- 150000002926 oxygen Chemical class 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/02—Preparation of oxygen
- C01B13/0229—Purification or separation processes
- C01B13/0248—Physical processing only
- C01B13/0259—Physical processing only by adsorption on solids
- C01B13/0262—Physical processing only by adsorption on solids characterised by the adsorbent
- C01B13/0274—Other molecular sieve materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40003—Methods relating to valve switching
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2210/00—Purification or separation of specific gases
- C01B2210/0001—Separation or purification processing
- C01B2210/0009—Physical processing
- C01B2210/0014—Physical processing by adsorption in solids
- C01B2210/0015—Physical processing by adsorption in solids characterised by the adsorbent
- C01B2210/002—Other molecular sieve materials
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Of Gases By Adsorption (AREA)
- Oxygen, Ozone, And Oxides In General (AREA)
Abstract
The invention relates to the technical field of oxygen generation systems, and provides a high-efficiency molecular sieve oxygen generation system based on a normally closed reversing valve, which comprises an air inlet pretreatment terminal, an air inlet molecular sieve terminal, an air inlet normally closed reversing valve terminal, a buffer storage terminal, an air outlet molecular sieve terminal, an air outlet normally closed reversing valve terminal and an oxygen storage terminal which are sequentially connected; the high-efficiency molecular sieve oxygen generation system based on the normally closed reversing valve also comprises a regulating terminal; the regulation terminal is connected with the air inlet pretreatment terminal, the air inlet molecular sieve terminal, the air inlet normally-closed reversing valve terminal, the buffer storage terminal, the air outlet molecular sieve terminal, the air outlet normally-closed reversing valve terminal and the oxygen storage terminal and is used for regulating and controlling the oxygen production process. The invention has the effect of improving the oxygen production quality of the oxygen production system.
Description
Technical Field
The invention relates to the technical field of oxygen generation systems, in particular to a high-efficiency molecular sieve oxygen generation system based on a normally closed reversing valve.
Background
Normally Closed reversing valves (NC) are a type of valve in which the valve is in a Closed state in its operating state. In the absence of an external force or stimulus, the valve will remain closed, preventing the passage of fluid. The valve will only open when an external force or stimulus is applied, allowing fluid to pass. The high-efficiency molecular sieve oxygen production system based on the normally-closed reversing valve is a system for producing high-purity oxygen, and the core part of the system comprises the normally-closed reversing valve and the high-efficiency molecular sieve. The system separates oxygen from air by molecular sieve technology, and realizes accurate control and flow direction adjustment of gas by means of a normally closed reversing valve so as to provide stable and high-purity oxygen supply.
A number of oxygen generating systems have been developed and, through extensive searching and reference, the prior art oxygen generating systems have been found to have oxygen generating systems as disclosed in publication nos. CN116044707A, CN107670152A, CN114876760A, EP0232426A1, US20100071698A1, JP2017223416a, which generally include: an air intake terminal, an oxygen generation terminal, and an oxygen storage terminal; the air suction terminal is used for sucking air and preprocessing the air; the oxygen generating terminal is used for extracting oxygen from the sucked air; the oxygen storage terminal is used for storing the prepared oxygen. The oxygen generation control process of the oxygen generation system is single and the oxygen generation mode is single, so that the oxygen generation system is not beneficial to being matched with various application scenes, and the defect of oxygen generation quality reduction of the oxygen generation system is caused.
Disclosure of Invention
The invention aims to provide a high-efficiency molecular sieve oxygen generation system based on a normally closed reversing valve, aiming at the defects of the oxygen generation system.
The invention adopts the following technical scheme:
An efficient molecular sieve oxygen generation system based on a normally closed reversing valve comprises an air inlet pretreatment terminal, an air inlet molecular sieve terminal, an air inlet normally closed reversing valve terminal, a buffer storage terminal, an air exhaust molecular sieve terminal, an air exhaust normally closed reversing valve terminal and an oxygen storage terminal which are connected in sequence; the high-efficiency molecular sieve oxygen generation system based on the normally closed reversing valve further comprises a regulating terminal; the regulation terminal is connected with an air inlet pretreatment terminal, an air inlet molecular sieve terminal, an air inlet normally-closed reversing valve terminal, a buffer storage terminal, an air outlet molecular sieve terminal, an air outlet normally-closed reversing valve terminal and an oxygen storage terminal and is used for regulating and controlling the oxygen production process; the air inlet pretreatment terminal is used for sucking and purifying air in the environment; the air inlet molecular sieve terminal is used for carrying out adsorption treatment on air from the air inlet pretreatment terminal and transmitting oxygen in the treated air to the air inlet normally-closed reversing valve terminal; the air inlet normally closed reversing valve terminal is used for adjusting the opening and closing states of the valve of the air inlet normally closed reversing valve terminal in real time according to the instruction of the regulating terminal; the buffer storage terminal is also connected with the oxygen storage terminal; the buffer storage terminal is used for transferring and conveying oxygen to the exhaust molecular sieve terminal or the oxygen storage terminal; the exhaust molecular sieve terminal is used for carrying out secondary adsorption treatment on oxygen from the buffer storage terminal; the exhaust normally closed reversing valve terminal is used for adjusting the opening and closing states of the valve of the exhaust normally closed reversing valve terminal in real time according to the instruction of the regulating terminal; the oxygen storage terminal is used for storing oxygen from the exhaust normally closed reversing valve terminal and oxygen from the buffer storage terminal.
Optionally, the air inlet pretreatment terminal comprises a compression module and a purification module; the compression module is used for sucking in ambient air and compressing the ambient air; the purification module is used for purifying the compressed air and removing moisture, grease and particulate impurities in the compressed air.
Optionally, the air inlet molecular sieve terminal comprises an air inlet adsorption module and an air inlet regeneration module; the air inlet adsorption module is used for adsorbing nitrogen and impurities in the compressed air and transmitting oxygen in the treated air to the air inlet normally closed reversing valve terminal; the air inlet regeneration module is used for carrying out regeneration treatment on the air inlet adsorption module and removing nitrogen and impurities in the air inlet adsorption module.
Optionally, the exhaust molecular sieve terminal comprises an exhaust adsorption module and an exhaust regeneration module; the exhaust adsorption module is used for adsorbing residual nitrogen and impurities in the oxygen and transmitting the oxygen after secondary adsorption to the exhaust normally closed reversing valve terminal; the exhaust gas regeneration module is used for carrying out regeneration treatment on the exhaust gas adsorption module and removing nitrogen and impurities in the exhaust gas adsorption module.
Optionally, the oxygen storage terminal comprises an oxygen storage module and an output module; the oxygen storage module is used for storing oxygen from the exhaust normally closed reversing valve terminal and oxygen from the buffer storage terminal; the output module outputs the oxygen in the oxygen storage module.
Optionally, the regulation terminal comprises an oxygen production process regulation module and an oxygen production mode selection module; the oxygen generation process regulation and control module is used for regulating and controlling a target compression pressure value of the compression module, a target boost pressure value in the buffer storage terminal, an opening and closing state of the air inlet normally closed reversing valve terminal, an opening and closing state of the air outlet normally closed reversing valve terminal and an output rate of the output module in the oxygen generation process of the system; the oxygen generation mode selection module is used for selecting an oxygen generation mode according to the oxygen therapy type, the user information and the oxygen therapy environment information; the oxygen generating mode comprises a first oxygen generating mode and a second oxygen generating mode; the first oxygen generation mode is used for driving the buffer storage terminal to transfer oxygen and convey the oxygen to the oxygen storage terminal; the second oxygen generation mode is used for driving the buffer storage terminal to transfer oxygen to the exhaust molecular sieve terminal.
Optionally, the oxygen generation mode selection module comprises an oxygen generation selection index calculation sub-module and an oxygen generation mode selection sub-module; the oxygen generation selection index calculation sub-module is used for calculating an oxygen generation selection index according to the oxygen therapy type, the user information and the oxygen therapy environment information; the oxygen generation mode selection submodule is used for selecting a corresponding oxygen generation mode according to the oxygen generation selection index;
when the oxygen generation selection index calculation sub-module works, the following formula is satisfied:
；
；
；
Wherein, oxygen index represents oxygen production selection index; o (kine) represents a coefficient selection function based on the type of oxygen therapy; kine represents the type of oxygen therapy; delta represents an age difference reference value; a represents the total number of users in the user information; age a represents the age value of the a-th user; h represents the altitude value of the position of the user in the oxygen therapy environment information;
kine=1 represents a class of oxygen therapy types; the oxygen therapy type comprises a household oxygen therapy type and an industrial oxygen therapy type; kine=2 represents the second type of oxygen therapy; the second type of oxygen therapy type comprises a medical oxygen therapy type and a high-altitude oxygen therapy type; the high altitude oxygen therapy type means that the altitude of the place where the oxygen therapy operation is performed is greater than a preset reference altitude; the reference altitude is empirically set by an administrator; lambda min and lambda max represent a minimum coefficient value and a maximum coefficient value, respectively, each set empirically by an administrator;
age ref represents a user age reference value; age min represents the minimum user age value; age max represents the maximum user age value;
When (when) When the oxygen generation mode selected by the oxygen generation mode selection submodule is a first oxygen generation mode; when/>When the oxygen generation mode selected by the oxygen generation mode selection submodule is a second oxygen generation mode; INDEX 1 represents an oxygen production mode selection threshold value that is empirically set by an administrator.
Optionally, the oxygen production process regulation and control module comprises a pressure regulation and control sub-module, an opening and closing state regulation and control sub-module and an output regulation and control sub-module; the pressure regulation and control submodule is used for regulating and controlling a target compression pressure value of the compression module and a target supercharging pressure value in the buffer storage terminal; the open-close state regulation submodule is used for regulating the open-close state of the air inlet normally-closed reversing valve terminal and the open-close state of the air outlet normally-closed reversing valve terminal; the output regulation and control submodule is used for regulating and controlling the output rate of the output module.
The high-efficiency molecular sieve oxygen generation method based on the normally closed reversing valve is applied to the high-efficiency molecular sieve oxygen generation system based on the normally closed reversing valve, and comprises the following steps of:
s1, sucking and purifying air in the environment;
S2, carrying out adsorption treatment on the air;
s3, adjusting the opening and closing states of the valve in real time according to the instruction;
S4, transferring the oxygen;
s5, performing secondary adsorption treatment on oxygen;
S6, storing oxygen.
The beneficial effects obtained by the invention are as follows:
1. The arrangement of the air inlet pretreatment terminal, the air inlet molecular sieve terminal, the air inlet normally-closed reversing valve terminal, the buffer storage terminal, the air exhaust molecular sieve terminal, the air exhaust normally-closed reversing valve terminal and the oxygen storage terminal is beneficial to enriching the oxygen production control process and the oxygen production mode, so that the oxygen production system is easier to adapt to more application scenes, and the quality and the efficiency of oxygen production are improved;
2. the compression module and the purification module are arranged to be beneficial to more efficiently completing pretreatment of the sucked air, so that the oxygen production quality is higher;
3. The arrangement of the air inlet adsorption module and the air inlet regeneration module is beneficial to keeping the working stability of an air inlet molecular sieve terminal, so that the quality of the oxygen production process is ensured, and the quality of oxygen production is improved;
4. The arrangement of the exhaust adsorption module and the exhaust regeneration module is matched with the air inlet adsorption module and the air inlet regeneration module, so that the effect of multiple adsorption is achieved, the control process and the oxygen generation mode are enriched, and further, the exhaust adsorption module and the exhaust regeneration module are better adapted to different application scenes, and the oxygen generation quality of an oxygen generation system is improved;
5. The oxygen generation process regulation and control module and the oxygen generation mode selection module further improve the adaptability of the oxygen generation system to various scenes, so that the oxygen generation system can prepare oxygen more quickly and efficiently, and the oxygen generation quality of the oxygen generation system is improved;
6. The oxygen generation selection index calculation sub-module and the oxygen generation mode selection sub-module are arranged in cooperation with an oxygen generation selection index algorithm, the accuracy of oxygen generation mode selection is further improved through calculating the oxygen generation selection index, and then the oxygen generation system can select the oxygen generation mode more efficiently and accurately according to different application scenes, so that the oxygen generation quality of the oxygen generation system is improved;
7. the arrangement of the air inlet opening and closing state index calculation unit, the air inlet normally closed reversing valve terminal regulation unit, the air outlet opening and closing state index calculation unit and the air outlet normally closed reversing valve terminal regulation unit is matched with an air inlet opening and closing state index algorithm and an air outlet opening and closing state index algorithm, so that an oxygen production system can better control two normally closed reversing valve terminals in different oxygen production modes, the oxygen production process is smoother, more stable and more efficient, and the oxygen production quality of the oxygen production system can be further improved.
For a further understanding of the nature and the technical aspects of the present invention, reference should be made to the following detailed description of the invention and the accompanying drawings, which are provided for purposes of reference only and are not intended to limit the invention.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic diagram of an oxygen generation mode selection module according to the present invention;
FIG. 3 is a schematic diagram of the structure of the oxygen production process control module according to the present invention;
FIG. 4 is a schematic flow chart of a method for preparing oxygen by using a high-efficiency molecular sieve based on a normally-closed reversing valve in the invention;
Fig. 5 is a schematic structural diagram of an open/close state control sub-module according to the present invention.
Detailed Description
The following embodiments of the present invention are described in terms of specific examples, and those skilled in the art will appreciate the advantages and effects of the present invention from the disclosure herein. The invention is capable of other and different embodiments and its several details are capable of modification and variation in various respects, all without departing from the spirit of the present invention. The drawings of the present invention are merely schematic illustrations, and are not drawn to actual dimensions, and are stated in advance. The following embodiments will further illustrate the related art of the present invention in detail, but the disclosure is not intended to limit the scope of the present invention.
Embodiment one: the embodiment provides a high-efficiency molecular sieve oxygen generation system based on a normally-closed reversing valve. Referring to fig. 1, the high-efficiency molecular sieve oxygen generation system based on the normally closed reversing valve comprises an air inlet pretreatment terminal, an air inlet molecular sieve terminal, an air inlet normally closed reversing valve terminal, a buffer storage terminal, an air outlet molecular sieve terminal, an air outlet normally closed reversing valve terminal and an oxygen storage terminal which are sequentially connected; the high-efficiency molecular sieve oxygen generation system based on the normally closed reversing valve further comprises a regulating terminal; the regulation terminal is connected with an air inlet pretreatment terminal, an air inlet molecular sieve terminal, an air inlet normally-closed reversing valve terminal, a buffer storage terminal, an air outlet molecular sieve terminal, an air outlet normally-closed reversing valve terminal and an oxygen storage terminal and is used for regulating and controlling the oxygen production process; the air inlet pretreatment terminal is used for sucking and purifying air in the environment; the air inlet molecular sieve terminal is used for carrying out adsorption treatment on air from the air inlet pretreatment terminal and transmitting oxygen in the air to the air inlet normally-closed reversing valve terminal; the air inlet normally closed reversing valve terminal is used for adjusting the opening and closing states of the valve in real time according to the instruction of the regulating terminal; the instruction for regulating and controlling the terminals is generated according to the states of all the terminals in the oxygen production process so as to optimize the oxygen production process; the buffer storage terminal is connected with the oxygen storage terminal; the buffer storage terminal is used for transferring and conveying the oxygen transmitted by the air inlet normally-closed reversing valve terminal to the exhaust molecular sieve terminal or the oxygen storage terminal; when the oxygen production requirement and application situation of the user require oxygen with higher quality, the buffer storage terminal conveys the oxygen to the exhaust molecular sieve terminal; when the oxygen production requirement of a user is smaller and the application situation requirement is lower, the buffer storage terminal transmits oxygen to the oxygen storage terminal; for example: the situation that the user belongs to a patient and the situation that the altitude of the place of the application scene is more than or equal to 1500 meters belongs to oxygen with higher quality; the situation that the user does not belong to a patient and the situation that the altitude of the place where the application scene is less than 1500 meters belongs to oxygen with lower quality; the exhaust molecular sieve terminal is used for carrying out secondary adsorption treatment on oxygen from the buffer storage terminal; the exhaust normally closed reversing valve terminal is used for adjusting the opening and closing states of the valve in real time according to the instruction of the regulating terminal; the oxygen storage terminal is used for storing oxygen from the exhaust normally closed reversing valve terminal and oxygen from the buffer storage terminal.
Optionally, the air inlet pretreatment terminal comprises a compression module and a purification module; the compression module is used for sucking in ambient air and compressing the ambient air; the purification module is used for purifying the compressed air and removing moisture, grease and particulate impurities in the compressed air.
Optionally, the air inlet molecular sieve terminal comprises an air inlet adsorption module and an air inlet regeneration module; the air inlet adsorption module is used for adsorbing nitrogen and impurities in the compressed air and transmitting oxygen in the air to the air inlet normally-closed reversing valve terminal; the air inlet regeneration module is used for carrying out regeneration treatment on the air inlet adsorption module and removing nitrogen and impurities in the air inlet adsorption module.
Optionally, the exhaust molecular sieve terminal comprises an exhaust adsorption module and an exhaust regeneration module; the exhaust adsorption module is used for adsorbing residual nitrogen and impurities in the oxygen and transmitting the oxygen after secondary adsorption to the exhaust normally closed reversing valve terminal; the exhaust gas regeneration module is used for carrying out regeneration treatment on the exhaust gas adsorption module and removing nitrogen and impurities in the exhaust gas adsorption module.
Optionally, the oxygen storage terminal comprises an oxygen storage module and an output module; the oxygen storage module is used for storing oxygen from the exhaust normally closed reversing valve terminal and oxygen from the buffer storage terminal; the output module outputs the oxygen in the oxygen storage module.
Optionally, the regulation terminal comprises an oxygen production process regulation module and an oxygen production mode selection module; the oxygen generation process regulation and control module is used for regulating and controlling a target compression pressure value of the compression module, a target boost pressure value in the buffer storage terminal, an opening and closing state of the air inlet normally closed reversing valve terminal and an output rate of the output module in the oxygen generation process of the system; the oxygen generation mode selection module is used for selecting an oxygen generation mode according to the oxygen therapy type, the user information and the oxygen therapy environment information; the oxygen production process regulation and control module carries out regulation and control operation according to an oxygen production mode and a control instruction input by a user; the oxygen generating mode comprises a first oxygen generating mode and a second oxygen generating mode; the first oxygen generation mode is used for driving the buffer storage terminal to transfer oxygen and convey the oxygen to the oxygen storage terminal; the second oxygen generation mode is used for driving the buffer storage terminal to transfer oxygen to the exhaust molecular sieve terminal; when the oxygen generating mode is the first oxygen generating mode, oxygen in the oxygen generating process directly enters the oxygen storage terminal, and the oxygen generating speed and the oxygen output speed in the process are determined by control instructions input by a user; when the oxygen generating mode is the second oxygen generating mode, oxygen in the oxygen generating process passes through the exhaust molecular sieve terminal, the oxygen generating quality is higher, and the oxygen generating speed and the oxygen generating output speed in the process are determined by control instructions input by a user.
Optionally, referring to fig. 2, the oxygen generating mode selection module includes an oxygen generating selection index calculation sub-module and an oxygen generating mode selection sub-module; the oxygen generation selection index calculation sub-module is used for calculating an oxygen generation selection index according to the oxygen therapy type, the user information and the oxygen therapy environment information; the oxygen generation mode selection submodule is used for selecting a corresponding oxygen generation mode according to the oxygen generation selection index;
when the oxygen generation selection index calculation sub-module works, the following formula is satisfied:
；
；
；
Wherein, oxygen index represents oxygen production selection index; o (kine) represents a coefficient selection function based on the type of oxygen therapy; kine represents the type of oxygen therapy; delta represents an age difference reference value; a represents the total number of users in the user information; age a represents the age value of the a-th user; h represents the altitude value of the position of the user in the oxygen therapy environment information;
kine=1 represents a class of oxygen therapy types; the oxygen therapy type comprises a household oxygen therapy type and an industrial oxygen therapy type; kine=2 represents the second type of oxygen therapy; the second type of oxygen therapy type comprises a medical oxygen therapy type and a high-altitude oxygen therapy type; the high altitude oxygen therapy type means that the altitude of the place where the oxygen therapy operation is performed is greater than a preset reference altitude; the reference altitude is empirically set by an administrator; lambda min and lambda max represent a minimum coefficient value and a maximum coefficient value, respectively, each set empirically by an administrator;
age ref represents a user age reference value; age min represents the minimum user age value; age max represents the maximum user age value; and the minimum user and the maximum user are users in the user information.
When (when)When the oxygen generation mode selected by the oxygen generation mode selection submodule is a first oxygen generation mode; when/>When the oxygen generation mode selected by the oxygen generation mode selection submodule is a second oxygen generation mode; INDEX 1 represents an oxygen production mode selection threshold value that is empirically set by an administrator.
Optionally, referring to fig. 3, the oxygen generating process control module includes a pressure control sub-module, an open/close state control sub-module, and an output control sub-module; the pressure regulation and control submodule is used for regulating and controlling a target compression pressure value of the compression module and a target supercharging pressure value in the buffer storage terminal; the open-close state regulation submodule is used for regulating the open-close state of the air inlet normally-closed reversing valve terminal and the open-close state of the air outlet normally-closed reversing valve terminal; the output regulation and control submodule is used for regulating and controlling the output rate of the output module. When the oxygen generation mode is the first oxygen generation mode, oxygen in the oxygen generation process directly enters an oxygen storage terminal through the pressure regulation and control submodule, the opening and closing state regulation and control submodule and the output regulation and control submodule, and the oxygen generation speed and the output speed in the process are determined by a control instruction input by a user; when the oxygen generation mode is the second oxygen generation mode, oxygen in the oxygen generation process passes through the exhaust molecular sieve terminal through the pressure regulation and control submodule, the opening and closing state regulation and control submodule and the output regulation and control submodule, and the oxygen generation speed and the output speed in the process are determined by control instructions input by a user. It should be noted that, the target compression pressure value of the compression module and the target boost pressure value inside the buffer storage terminal are both preset by the user.
The utility model provides a high-efficient molecular sieve oxygen generation method based on normal close switching-over valve, is applied to a high-efficient molecular sieve oxygen generation system based on normal close switching-over valve as above, combines the figure 4 to show, high-efficient molecular sieve oxygen generation method includes:
s1, sucking and purifying air in the environment;
S2, carrying out adsorption treatment on the air;
s3, adjusting the opening and closing states of the valve in real time according to the instruction;
S4, transferring the oxygen;
s5, performing secondary adsorption treatment on oxygen;
S6, storing oxygen.
The arrangement of the air inlet pretreatment terminal, the air inlet molecular sieve terminal, the air inlet normally-closed reversing valve terminal, the buffer storage terminal, the air outlet molecular sieve terminal, the air outlet normally-closed reversing valve terminal and the oxygen storage terminal is beneficial to more efficiently completing pretreatment of the sucked air, and the working stability of the air inlet molecular sieve terminal is maintained, so that the quality of the oxygen production process is ensured, and the air inlet adsorption module and the air inlet regeneration module are matched, thereby being beneficial to playing the multiple adsorption effect; the accuracy of oxygen generation mode selection is further improved by calculating the oxygen generation selection index, so that the oxygen generation system can select the oxygen generation mode more efficiently and accurately according to different application scenes, the oxygen generation system is easier to adapt to more application scenes, and the quality and the efficiency of oxygen generation are improved.
Embodiment two: the embodiment includes the whole content of the first embodiment, and provides a high-efficiency molecular sieve oxygen generation system based on a normally closed reversing valve, and referring to fig. 5, the open-close state regulation submodule includes an intake open-close state index calculation unit, an intake normally closed reversing valve terminal regulation unit, an exhaust open-close state index calculation unit and an exhaust normally closed reversing valve terminal regulation unit; the intake air open-close state index calculation unit is used for calculating an intake air open-close state index according to the real-time compression pressure value of the compression module, the target compression pressure value, the real-time pressure value of the intake molecular sieve terminal and the real-time air pressure value of the buffer storage terminal; the terminal regulation unit of the air inlet normally-closed reversing valve is used for regulating and controlling the opening and closing states of the terminal of the air inlet normally-closed reversing valve according to the opening and closing state indexes of the air inlet; the exhaust gas open-close state index calculation unit is used for calculating an exhaust gas open-close state index according to the real-time air pressure value of the buffer storage terminal and the real-time pressure value of the exhaust molecular sieve terminal; the exhaust normally closed reversing valve terminal regulating unit is used for regulating and controlling the opening and closing states of the exhaust normally closed reversing valve terminal according to the exhaust opening and closing state indexes;
In any one of the oxygen generation modes, the intake opening/closing state index calculation unit is started and operated, and when the intake opening/closing state index calculation unit is operated, the following equation is satisfied:
；
Wherein state 1 represents an intake opening/closing state index; k 1 to k 3 respectively represent different index value conversion coefficients, each of which is empirically set by an administrator; p 1 represents the real-time compression pressure value of the compression module; p ref represents a target compression pressure value of the compression module; p 2 and P 3 represent the real-time pressure value of the air inlet molecular sieve terminal and the real-time air pressure value of the buffer storage terminal respectively;
When (when) When the air inlet normally closed reversing valve terminal regulating unit is used, the opening and closing state of the air inlet normally closed reversing valve terminal is changed into an opening state; when/>When the air inlet normally-closed reversing valve terminal regulating and controlling unit keeps the state of the air inlet normally-closed reversing valve terminal to be in a normally-closed state; INDEX 2 represents the regulation threshold value of the air inlet normally-closed reversing valve terminal, and is set by an administrator according to experience;
When the oxygen production mode is the second oxygen production mode, the exhaust gas open/close state index calculation unit starts operating and satisfies the following equation:
；
Wherein state 2 represents an exhaust gas open/close state index; η 1 and η 2 represent a first pressure conversion value and a second pressure conversion value, respectively, each of which is empirically set by an administrator; p 3 and P 4 respectively represent the real-time air pressure value of the buffer storage terminal and the real-time pressure value of the exhaust molecular sieve terminal;
When (when) When the exhaust normally closed reversing valve terminal regulating unit is used, the opening and closing state of the exhaust normally closed reversing valve terminal is changed into an opening state; when/>When the exhaust normally-closed reversing valve terminal regulating unit is used, the opening and closing state of the exhaust normally-closed reversing valve terminal is kept to be a normally-closed state; INDEX 3 represents a regulatory threshold for the exhaust normally closed diverter valve terminal, which is empirically set by an administrator.
The air inlet opening and closing state index calculation unit, the air inlet normally closed reversing valve terminal regulation unit, the air outlet opening and closing state index calculation unit and the air outlet normally closed reversing valve terminal regulation unit are matched with an air inlet opening and closing state index algorithm and an air outlet opening and closing state index algorithm, so that an oxygen production system can better control two normally closed reversing valve terminals in different oxygen production modes, the oxygen production process is smoother, more stable and more efficient, and the oxygen production quality of the oxygen production system can be further improved.
The foregoing disclosure is only a preferred embodiment of the present invention and is not intended to limit the scope of the invention, so that all equivalent technical changes made by the application of the present invention and the accompanying drawings are included in the scope of the invention, and in addition, the elements in the invention can be updated with the technical development.
Claims (6)
1. The high-efficiency molecular sieve oxygen generation system based on the normally-closed reversing valve is characterized by comprising an air inlet pretreatment terminal, an air inlet molecular sieve terminal, an air inlet normally-closed reversing valve terminal, a buffer storage terminal, an air exhaust molecular sieve terminal, an air exhaust normally-closed reversing valve terminal and an oxygen storage terminal which are connected in sequence; the high-efficiency molecular sieve oxygen generation system based on the normally closed reversing valve further comprises a regulating terminal; the regulation terminal is connected with an air inlet pretreatment terminal, an air inlet molecular sieve terminal, an air inlet normally-closed reversing valve terminal, a buffer storage terminal, an air outlet molecular sieve terminal, an air outlet normally-closed reversing valve terminal and an oxygen storage terminal and is used for regulating and controlling the oxygen production process; the air inlet pretreatment terminal is used for sucking and purifying air in the environment; the air inlet molecular sieve terminal is used for carrying out adsorption treatment on air from the air inlet pretreatment terminal and transmitting oxygen in the treated air to the air inlet normally-closed reversing valve terminal; the air inlet normally closed reversing valve terminal is used for adjusting the opening and closing states of the valve of the air inlet normally closed reversing valve terminal in real time according to the instruction of the regulating terminal; the buffer storage terminal is also connected with the oxygen storage terminal; the buffer storage terminal is used for transferring and conveying oxygen to the exhaust molecular sieve terminal or the oxygen storage terminal; the exhaust molecular sieve terminal is used for carrying out secondary adsorption treatment on oxygen from the buffer storage terminal; the exhaust normally closed reversing valve terminal is used for adjusting the opening and closing states of the valve of the exhaust normally closed reversing valve terminal in real time according to the instruction of the regulating terminal; the oxygen storage terminal is used for storing oxygen from the exhaust normally closed reversing valve terminal and oxygen from the buffer storage terminal;
the air inlet pretreatment terminal comprises a compression module and a purification module; the compression module is used for sucking in ambient air and compressing the ambient air; the purification module is used for purifying the compressed air and removing moisture, grease and particulate impurities in the compressed air;
The regulation and control terminal comprises an oxygen production process regulation and control module and an oxygen production mode selection module; the oxygen generation process regulation and control module is used for regulating and controlling a target compression pressure value of the compression module, a target boost pressure value in the buffer storage terminal, an opening and closing state of the air inlet normally closed reversing valve terminal, an opening and closing state of the air outlet normally closed reversing valve terminal and an output rate of the output module in the oxygen generation process of the system; the oxygen generation mode selection module is used for selecting an oxygen generation mode according to the oxygen therapy type, the user information and the oxygen therapy environment information; the oxygen generating mode comprises a first oxygen generating mode and a second oxygen generating mode; the first oxygen generation mode is used for driving the buffer storage terminal to transfer oxygen and convey the oxygen to the oxygen storage terminal; the second oxygen generation mode is used for driving the buffer storage terminal to transfer oxygen to the exhaust molecular sieve terminal;
The oxygen generation mode selection module comprises an oxygen generation selection index calculation sub-module and an oxygen generation mode selection sub-module; the oxygen generation selection index calculation sub-module is used for calculating an oxygen generation selection index according to the oxygen therapy type, the user information and the oxygen therapy environment information; the oxygen generation mode selection submodule is used for selecting a corresponding oxygen generation mode according to the oxygen generation selection index;
when the oxygen generation selection index calculation sub-module works, the following formula is satisfied:
；
；
；
Wherein, oxygen index represents oxygen production selection index; o (kine) represents a coefficient selection function based on the type of oxygen therapy; kine represents the type of oxygen therapy; delta represents an age difference reference value; a represents the total number of users in the user information; age a represents the age value of the a-th user; h represents the altitude value of the position of the user in the oxygen therapy environment information;
kine=1 represents a class of oxygen therapy types; the oxygen therapy type comprises a household oxygen therapy type and an industrial oxygen therapy type; kine=2 represents the second type of oxygen therapy; the second type of oxygen therapy type comprises a medical oxygen therapy type and a high-altitude oxygen therapy type; the high altitude oxygen therapy type means that the altitude of the place where the oxygen therapy operation is performed is greater than a preset reference altitude; lambda min and lambda max represent a minimum coefficient value and a maximum coefficient value, respectively;
age ref represents a user age reference value; age min represents the minimum user age value; age max represents the maximum user age value; when (when) When the oxygen generation mode selected by the oxygen generation mode selection submodule is a first oxygen generation mode; when/>When the oxygen generation mode selected by the oxygen generation mode selection submodule is a second oxygen generation mode; INDEX 1 represents an oxygen generation mode selection threshold.
2. The high-efficiency molecular sieve oxygen generation system based on the normally-closed reversing valve according to claim 1, wherein the air inlet molecular sieve terminal comprises an air inlet adsorption module and an air inlet regeneration module; the air inlet adsorption module is used for adsorbing nitrogen and impurities in the compressed air and transmitting oxygen in the treated air to the air inlet normally closed reversing valve terminal; the air inlet regeneration module is used for carrying out regeneration treatment on the air inlet adsorption module and removing nitrogen and impurities in the air inlet adsorption module.
3. The high-efficiency molecular sieve oxygen generation system based on a normally closed reversing valve according to claim 2, wherein the exhaust molecular sieve terminal comprises an exhaust adsorption module and an exhaust regeneration module; the exhaust adsorption module is used for adsorbing residual nitrogen and impurities in the oxygen and transmitting the oxygen after secondary adsorption to the exhaust normally closed reversing valve terminal; the exhaust gas regeneration module is used for carrying out regeneration treatment on the exhaust gas adsorption module and removing nitrogen and impurities in the exhaust gas adsorption module.
4. A high efficiency molecular sieve oxygen generation system based on a normally closed reversing valve according to claim 3, wherein the oxygen storage terminal comprises an oxygen storage module and an output module; the oxygen storage module is used for storing oxygen from the exhaust normally closed reversing valve terminal and oxygen from the buffer storage terminal; the output module outputs the oxygen in the oxygen storage module.
5. The high-efficiency molecular sieve oxygen generation system based on the normally-closed reversing valve according to claim 4, wherein the oxygen generation process regulation and control module comprises a pressure regulation and control submodule, an opening and closing state regulation and control submodule and an output regulation and control submodule; the pressure regulation and control submodule is used for regulating and controlling a target compression pressure value of the compression module and a target supercharging pressure value in the buffer storage terminal; the open-close state regulation submodule is used for regulating the open-close state of the air inlet normally-closed reversing valve terminal and the open-close state of the air outlet normally-closed reversing valve terminal; the output regulation and control submodule is used for regulating and controlling the output rate of the output module.
6. The high-efficiency molecular sieve oxygen generation method based on the normally-closed reversing valve is applied to the high-efficiency molecular sieve oxygen generation system based on the normally-closed reversing valve as claimed in claim 5, and is characterized in that the high-efficiency molecular sieve oxygen generation method comprises the following steps:
s1, sucking and purifying air in the environment;
S2, carrying out adsorption treatment on the air;
s3, adjusting the opening and closing states of the valve in real time according to the instruction;
S4, transferring the oxygen;
s5, performing secondary adsorption treatment on oxygen;
S6, storing oxygen.
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