CN213537274U - Improve oxygen yield's molecular tower structure - Google Patents
Improve oxygen yield's molecular tower structure Download PDFInfo
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- CN213537274U CN213537274U CN202022532845.9U CN202022532845U CN213537274U CN 213537274 U CN213537274 U CN 213537274U CN 202022532845 U CN202022532845 U CN 202022532845U CN 213537274 U CN213537274 U CN 213537274U
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Abstract
The utility model relates to a molecular tower structure for improving oxygen production, which comprises an air inlet pipeline, wherein the air inlet pipeline is connected with a separating valve, the separating valve is provided with a first output pipe, a second output pipe, a first electromagnetic valve A, B valve, the first output pipe and the second output pipe are respectively connected with an A adsorption tower and a B adsorption tower, the molecular tower structure further comprises a lower cover, the lower cover is provided with a first A air limiting hole, a second A air limiting hole, a first B air limiting hole and a second B air limiting hole, the first A air limiting hole and the first B air limiting hole are communicated with an auxiliary exhaust valve, the second A air limiting hole and the second B air limiting hole are communicated and then communicated with an oxygen outlet, the molecular tower structure further comprises a second electromagnetic valve, the second electromagnetic valve is used for communicating the first A air limiting hole and the first B air limiting hole or disconnecting the first B air limiting hole, the pressure in the A adsorption tower or the B adsorption tower is raised through the first electromagnetic valve A, B valve and the second electromagnetic valve, the nitrogen is, and (4) rapidly conducting to release oxygen existing in the adsorption tower, then closing the adsorption tower, and circulating the steps until the next period so as to achieve high-efficiency oxygen discharge.
Description
Technical Field
The utility model relates to a PSA system oxygen technical field especially relates to a improve oxygen output's molecular tower structure.
Background
PSA oxygen production is to adsorb nitrogen under high pressure through a molecular sieve, discharge the adsorbed nitrogen under low pressure, and repeat the steps; the capability of adsorbing nitrogen is related to the working pressure, and within the working pressure range, the higher the working air pressure is, the higher the nitrogen adsorption efficiency of the molecular sieve is; the conventional molecular tower has a common structure, namely, the maximum flow of outlet air is limited to be smaller than the flow of inlet air by limiting the flow at the outlet end, a certain pressure in the tower is maintained, and the molecular sieve effectively absorbs nitrogen in the air to achieve the purpose of flowing out high-concentration oxygen. Since the compressor output gas flow is limited and the amount of molecular sieve packing is cost prohibitive, excessive packing is not possible and increases volume and weight. Therefore, when the output flow is increased, the working air pressure in the tower is inevitably reduced, and the capability of the molecular sieve in the tower for adsorbing nitrogen is also reduced, and finally, the concentration of the output oxygen is reduced or the maximum flow is reduced.
SUMMERY OF THE UTILITY MODEL
Therefore, it is necessary to provide a molecular tower structure for increasing oxygen yield aiming at the problem of low oxygen yield of an oxygen generator, and an auxiliary gas communication channel is added between two adsorption towers, so as to achieve the purpose of increasing oxygen yield by adjusting the time length, the synchronous relation and the flow during gas communication.
A molecular tower structure for improving oxygen production amount is characterized by comprising an air inlet pipeline, wherein the air inlet pipeline is connected with a separating valve, the separating valve is provided with a first output pipe and a second output pipe, a first electromagnetic valve A and a first electromagnetic valve B for controlling the connection and disconnection of the air inlet pipeline and the first output pipe and the second output pipe are arranged in the separating valve, the first output pipe and the second output pipe are respectively connected with an A adsorption tower and a B adsorption tower, a lower cover is arranged on the other side of the A adsorption tower and the B adsorption tower, a first A air limiting hole and a second A air limiting hole which are communicated with the A adsorption tower, a first B air limiting hole and a second B air limiting hole which are communicated with the B adsorption tower are arranged on the lower cover, the first A air limiting hole and the first B air limiting hole are communicated with an auxiliary exhaust valve, the second A air limiting hole and the second B air limiting hole are communicated with an oxygen outlet, and a second electromagnetic valve is arranged outside the first A air limiting hole and the first B air limiting hole and is used for communicating the first A air limiting hole and the first B air limiting hole or respectively disconnecting the first A air limiting hole and the first B air limiting hole from the outside.
In one embodiment, the outer side of the lower cover is provided with a lower cover bottom.
In one embodiment, an air outlet groove, a first air outlet groove and a second air outlet groove are formed between the lower cover and the lower cover bottom, the first A air limiting hole is communicated with the first air outlet groove, the first B air limiting hole is communicated with the second air outlet groove, and the second A air limiting hole and the second B air limiting hole are both communicated with the air outlet groove.
In one embodiment, the middle part of the gas outlet groove is provided with a gas outlet through hole communicated with the oxygen outlet.
In one embodiment, a lower cover sealing ring is arranged between the lower cover and the lower cover bottom, and the lower cover sealing ring is clamped in the air outlet groove, the first exhaust groove and the second exhaust groove and is used for separating the air outlet groove, the first exhaust groove and the second exhaust groove to enable the air outlet groove, the first exhaust groove and the second exhaust groove to be independent.
In one embodiment, the side surface of the lower cover is respectively provided with a first exhaust hole and a second exhaust hole which are communicated with the first exhaust groove and the second exhaust groove,
in one embodiment, an auxiliary exhaust valve is arranged on the outer side of the lower cover, the auxiliary exhaust valve comprises a first auxiliary exhaust hole and a second auxiliary exhaust hole which are communicated with the first exhaust hole and the second exhaust hole, and the auxiliary exhaust valve further comprises a second electromagnetic valve which controls the communication or disconnection between the first auxiliary exhaust hole and the second auxiliary exhaust hole.
In one embodiment, the adsorption tower A comprises an upper cover, an aluminum pipe and a lower cover, wherein a spring, a first filter, first filter paper, a molecular sieve, second filter paper and a second filter are sequentially arranged between the upper cover and the lower cover in the aluminum pipe.
In one embodiment, the operation time of the first solenoid valve a and the first solenoid valve B is c, the operation time of the second solenoid valve is a, the first solenoid valve a and the first solenoid valve B are alternately started and stopped, so that the air inlet pipeline is communicated with the a adsorption tower or the B adsorption tower, during the switching process of the first solenoid valve a and the first solenoid valve B, the operation end time and the start time interval of the adjacent first solenoid valve a and first solenoid valve B are f, the working time period of the first solenoid valve a/first solenoid valve B is d, the working time period of the second solenoid valve is B, d =2B, when the start is started, the first solenoid valve a is delayed to start the second solenoid valve, and the delay time is e.
In one embodiment, a =2s, b =6.7s, c =7.4s, d =13.4s, e =1.1s, f = -0.7 s.
The molecular tower structure for improving oxygen production adopts the first electromagnetic valve A, the first electromagnetic valve B and the second electromagnetic valve, in the using process, the air inlet pipeline is communicated with the adsorption tower A or the adsorption tower B through the first electromagnetic valve A and the first electromagnetic valve B, when one adsorption tower is communicated, nitrogen can be adsorbed through the action of the adsorption tower, so that high-concentration oxygen flows out from an oxygen outlet, meanwhile, after the high-concentration oxygen is obtained, the air inlet pipeline is switched to be communicated with the other adsorption tower through the first electromagnetic valve A and the first electromagnetic valve B, meanwhile, the communication between the adsorption tower A and the adsorption tower B can be controlled through the second electromagnetic valve, so that the nitrogen in the previous adsorption tower is discharged from a nitrogen exhaust hole, namely, the adsorption tower A and the adsorption tower B are intermittently communicated, when the adsorption tower is stopped, the pressure in the adsorption tower rises, the nitrogen is fully adsorbed, and after the nitrogen reaches the rated pressure, the nitrogen is rapidly conducted to release the oxygen existing in the adsorption tower, then the nitrogen is closed again to wait for the next period, and the circulation is carried out, so that the purpose of efficiently discharging the oxygen is achieved.
Drawings
FIG. 1 is a schematic view of the overall structure of the molecular tower of the present invention;
FIG. 2 is a schematic diagram of the molecular tower of the present invention;
FIG. 3 is a schematic diagram of the structure of the molecular tower explosion diagram of the present invention;
FIG. 4 is a schematic view of the structure of the lower cover of the molecular tower of the present invention;
FIG. 5 is a schematic view of the structure of the lower cover and the bottom of the molecular tower of the present invention;
FIG. 6 is a schematic view of the structure of the auxiliary exhaust valve of the molecular tower of the present invention;
FIG. 7 is a schematic diagram of the working timing sequence relationship and synchronization relationship among the first solenoid valve A, the first solenoid valve B and the second solenoid valve in the molecular tower of the present invention;
the adsorption tower comprises a separation valve 1, a separation valve 2, an adsorption tower A, a separation tower 21, an upper cover 22, a spring 23, a first filter sheet 24, first filter paper 25, a molecular sieve 26, an aluminum pipe 27, second filter paper 28, a second filter sheet 3, an adsorption tower B, a lower cover 4, a gas outlet groove 41, a gas outlet groove 42, a first gas outlet groove 43, a second gas outlet groove 44, a first gas limiting hole A, a second gas limiting hole A45, a second gas limiting hole A46, a first gas limiting hole B47, a second gas limiting hole B5, a lower cover bottom 51, a first gas outlet hole 52, a second gas outlet hole 6, an auxiliary gas outlet valve 61, a first auxiliary gas outlet hole 62, a second auxiliary gas outlet hole 7, an oxygen outlet 8 and a lower cover sealing ring.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for descriptive purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
A molecular tower structure for improving oxygen production amount comprises an air inlet pipeline, wherein the air inlet pipeline is connected with a separating valve 1, the separating valve 1 is provided with a first output pipe and a second output pipe, a first electromagnetic valve A and a first electromagnetic valve B which are used for controlling the communication and disconnection of the air inlet pipeline and the first output pipe and the second output pipe are arranged in the separating valve 1, the first output pipe and the second output pipe are respectively connected with an A adsorption tower 2 and a B adsorption tower 3, the other side of the A adsorption tower 2 and the B adsorption tower 3 is provided with a lower cover 4, the lower cover 4 is provided with a first A air limiting hole 44 and a second A air limiting hole 45 which are communicated with the A adsorption tower 2, a first B air limiting hole 46 and a second B air limiting hole 47 which are communicated with the B adsorption tower, the first A air limiting hole 44 and the first B air limiting hole 46 are communicated with an auxiliary exhaust valve 6, the second A air limiting hole 45 is communicated with the second B air limiting hole 47, the second A air limiting hole 45 is communicated with the second B air limiting hole 47 and then communicated with the oxygen outlet 7, and a second electromagnetic valve is arranged outside the first A air limiting hole 44 and the first B air limiting hole 46 and used for enabling the first A air limiting hole 44 and the first B air limiting hole 46 to be communicated or respectively disconnected with the outside.
The first electromagnetic valve A, the first electromagnetic valve B and the second electromagnetic valve are adopted, in the using process, the air inlet pipeline is communicated with the A adsorption tower 2 or the B adsorption tower 3 through the first electromagnetic valve A and the first electromagnetic valve B, when one adsorption tower is communicated, nitrogen can be adsorbed through the action of the adsorption tower, so that high-concentration oxygen flows out from the oxygen outlet 7, meanwhile, after the high-concentration oxygen is obtained, the air inlet pipeline is switched to be communicated with the other adsorption tower through the first electromagnetic valve A and the first electromagnetic valve B, meanwhile, the communication between the A adsorption tower 2 and the B adsorption tower 3 can be controlled through the second electromagnetic valve, so that the nitrogen in the previous adsorption tower is discharged from the nitrogen exhaust hole, namely, the A adsorption tower 2 and the B adsorption tower 3 are intermittently conducted, when the adsorption tower is stopped, the pressure in the adsorption tower rises, the nitrogen is sufficiently adsorbed, after the rated pressure is reached, the adsorption tower is rapidly conducted to release the oxygen existing in the adsorption tower, then the adsorption tower is closed again to wait for the next period, and the circulation is carried out, so that the purpose of efficiently discharging the oxygen is achieved.
In order to make the first a air restriction hole 44, the second a air restriction hole 45 and the second B air restriction hole 47 provided on the lower cover 4 relatively independent, in this embodiment, the lower cover 4 is provided with a lower cover 4 bottom, an air outlet groove 41, a first exhaust groove 42 and a second exhaust groove 43 are formed between the lower cover 4 and the lower cover bottom 5, the first a air restriction hole 44 is communicated with the first exhaust groove 42, the first B air restriction hole 46 is communicated with the second exhaust groove 43, the second a air restriction hole 45 and the second B air restriction hole 47 are communicated with the air outlet groove 41, meanwhile, a lower cover sealing ring 8 is provided between the lower cover 4 and the lower cover bottom 5, the lower cover sealing ring 8 is clamped in the air outlet groove 41, the first exhaust groove 42 and the second exhaust groove 43 for separating the air outlet groove 41, the first exhaust groove 42 and the second exhaust groove 43 from each other, therefore, the first a air limiting hole 44, the second a air limiting hole 45, the first B air limiting hole 46 and the second B air limiting hole 47 are relatively independent, meanwhile, because the second a air limiting hole 45 and the second B air limiting hole 47 are both communicated with the air outlet groove 41, the second a air limiting hole 45 and the second B air limiting hole 47 are in a communicated state, further, an air outlet through hole communicated with the oxygen outlet 7 is arranged in the middle of the air outlet groove 41, and thus, residual oxygen after filtering (adsorbing nitrogen) through the a adsorption tower 2 and the B adsorption tower 3 can flow out from the oxygen outlet 7.
The connection and disconnection between the first a air restriction hole 44 and the first B air restriction hole 46 and the outside, and the connection or disconnection between the two holes are controlled by a second solenoid valve, specifically, the outer side of the lower cover 4 is provided with an auxiliary exhaust valve 6, the auxiliary exhaust valve 6 includes a first auxiliary exhaust hole 61 and a second auxiliary exhaust hole 62 which are connected with a first exhaust hole 51 and a second exhaust hole 52, and further includes a second solenoid valve which controls the connection or disconnection between the first auxiliary exhaust hole 61 and the second auxiliary exhaust hole 62, at this time, the side of the lower cover 4 is provided with a first exhaust hole 51 and a second exhaust hole 52, the first exhaust hole 51 and the second exhaust hole 52 are obliquely arranged and extend to the lower side of the lower cover 4 (the upper side of the lower cover bottom 5), and at this time, the first exhaust hole 51 and the second exhaust hole 52 are respectively connected with the first exhaust groove 42 and the second exhaust groove 43, so that the first B air restriction hole 46 can pass through the second exhaust groove 43, and the second exhaust hole 43, The second exhaust hole 52 is connected to the second auxiliary exhaust hole 62, the first a air limiting hole 44 is connected to the first auxiliary exhaust hole 61 through the first exhaust groove 42 and the first exhaust hole 51, at this time, the second electromagnetic valve is located inside (or at one end) of the auxiliary exhaust valve 6, and the first auxiliary exhaust hole 61 and the second auxiliary exhaust hole 62 are disconnected from the outside or are in a connected state under the action of the second electromagnetic valve.
Of course, in this embodiment, the structure of the a adsorption tower 2 and the B adsorption tower 3 is the same, specifically, the a adsorption tower 2 includes an upper cover 21, an aluminum pipe 26, and a lower cover 44, and a spring 22, a first filter 23, a first filter paper 24, a molecular sieve 25, a second filter paper 27, and a second filter paper 28 are sequentially disposed between the upper cover 21 and the lower cover 44 in the aluminum pipe 26, and in this embodiment, the structure of the adsorption tower (the a adsorption tower 2 and the B adsorption tower 3) is a technical solution in the prior art, and therefore, detailed description thereof is omitted.
The operation time of the first electromagnetic valve A and the operation time of the first electromagnetic valve B are c, the operation time of the second electromagnetic valve is a, the first electromagnetic valve A and the first electromagnetic valve B are started and stopped in a staggered mode, so that an air inlet pipeline is communicated with an adsorption tower A or a adsorption tower B, in the switching process of the first electromagnetic valve A and the first electromagnetic valve B, the operation ending time and the starting time interval of the adjacent first electromagnetic valve A and the first electromagnetic valve B are f, the working time period of the first electromagnetic valve A/the first electromagnetic valve B is d, the working time period of the second electromagnetic valve is B, d =2B, when the first electromagnetic valve A is started at the beginning, the second electromagnetic valve is started after the first electromagnetic valve A is delayed, and the delay time is e.
Specifically, in the whole operation process, the second electromagnetic valve is firstly started, the operation time a is a time at which the first electromagnetic valve a is started after the second electromagnetic valve start time e, the operation time of the first electromagnetic valve a is c, the interval between the first electromagnetic valve B start time and the first electromagnetic valve a close time is f, the operation time of the second electromagnetic valve B is c, the operation time period of the first electromagnetic valve a/the first electromagnetic valve B is d, and the operation time period of the second electromagnetic valve is B, wherein d =2B, at this time, f may be a positive number or zero or a negative number, that is, the first electromagnetic valve B may be started after the first electromagnetic valve a is closed and before the first electromagnetic valve a is started or closed, and the setting adjustment may be performed according to actual requirements, in this embodiment, f is a negative number, specifically, in this embodiment, a =2s, b =6.7s, c =7.4s, d =13.4s, e =1.1s, f = -0.7 s.
In the specific use process, when the molecular tower structure for improving the oxygen production amount is started, the second electromagnetic valve is started firstly, the first electromagnetic valve A is started within the time e (1.1 s) after the second electromagnetic valve is started, at the moment, the compressed air flows through the air inlet pipeline and the first output pipe to the position of the first electromagnetic valve A, the first output pipe is communicated with the adsorption tower A2 under the action of the first electromagnetic valve A, at the moment, the second output pipe is disconnected with the adsorption tower B3 due to the first electromagnetic valve B, the adsorption tower B3 is communicated with the exhaust outlet of the first electromagnetic valve B, the pressure in the adsorption tower A2 is gradually increased in the process that the compressed air continuously enters the adsorption tower A2, at the moment, the filtered high-concentration oxygen is discharged from the second A air limiting hole 45, the air outlet groove 41 and finally the oxygen outlet 7 under the action of the adsorption tower A2 and is collected, in this process, the first auxiliary discharge hole 61 and the second auxiliary discharge hole 62 are in the independent state by the second electromagnetic valve, so at this time, the a adsorption column 2 and the B adsorption column 3 are not communicated at the positions of the first a limiting gas hole 44 and the first B limiting gas hole 46, the B adsorption column 3 is in the independent state, and after the a adsorption column 2 is aerated for a while, the molecular sieve in the a adsorption column 2 adsorbs more nitrogen, the adsorption capacity is weakened, in the process, the first electromagnetic valve a valve operation time c (7.4 s) and the second electromagnetic valve operation time a (2 s) are in the independent state, after the second electromagnetic valve is stopped, a certain time (B-a =4.7 s) passes, the second electromagnetic valve is started again, and at the same time, the first electromagnetic valve B is started, the first electromagnetic valve B valve is started at the time f (0.7 s) before the first electromagnetic valve a is disconnected, the operation time of the first electromagnetic valve B is also c (7.4 s), so that in the subsequent operation process, the first electromagnetic valve A and the first electromagnetic valve B are mutually staggered, the adsorption tower A is communicated with the first output pipe, or the adsorption tower B is communicated with the second output pipe, and when the first electromagnetic valve A and the first electromagnetic valve B are mutually staggered, the second electromagnetic valve is started and operates for a period of time a (2 s).
Therefore, in the whole process, under the action of the first electromagnetic valve A, the first electromagnetic valve B and the second electromagnetic valve, the pressure in the adsorption tower rises, the nitrogen is fully adsorbed, after the rated pressure is reached, the adsorption tower is rapidly conducted to release the oxygen existing in the adsorption tower, then the adsorption tower is closed again to wait for the next period, and the circulation is carried out, so that the purpose of efficiently discharging the oxygen is achieved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A molecular tower structure for improving oxygen production amount is characterized by comprising an air inlet pipeline, wherein the air inlet pipeline is connected with a separating valve, the separating valve is provided with a first output pipe and a second output pipe, a first electromagnetic valve A and a first electromagnetic valve B for controlling the connection and disconnection of the air inlet pipeline and the first output pipe and the second output pipe are arranged in the separating valve, the first output pipe and the second output pipe are respectively connected with an A adsorption tower and a B adsorption tower, a lower cover is arranged on the other side of the A adsorption tower and the B adsorption tower, a first A air limiting hole and a second A air limiting hole which are communicated with the A adsorption tower, a first B air limiting hole and a second B air limiting hole which are communicated with the B adsorption tower are arranged on the lower cover, the first A air limiting hole and the first B air limiting hole are communicated with an auxiliary exhaust valve, the second A air limiting hole and the second B air limiting hole are communicated with an oxygen outlet, and a second electromagnetic valve is arranged outside the first A air limiting hole and the first B air limiting hole and is used for communicating the first A air limiting hole and the first B air limiting hole or respectively disconnecting the first A air limiting hole and the first B air limiting hole from the outside.
2. The molecular tower structure for increasing oxygen production according to claim 1, wherein the lower cover is provided with a lower cover bottom at the outer side.
3. The molecular tower structure for increasing oxygen production according to claim 2, wherein an air outlet groove, a first air outlet groove and a second air outlet groove are formed between the lower cover and the bottom of the lower cover, the first a air limiting hole is communicated with the first air outlet groove, the first B air limiting hole is communicated with the second air outlet groove, and the second a air limiting hole and the second B air limiting hole are both communicated with the air outlet groove.
4. The molecular tower structure for increasing oxygen production according to claim 3, wherein the middle of the gas outlet groove is provided with a gas outlet through hole communicated with the oxygen outlet.
5. The molecular tower structure for increasing oxygen production according to claim 4, wherein a lower cover sealing ring is disposed between the lower cover and the lower cover bottom, and the lower cover sealing ring is clamped in the gas outlet groove, the first gas discharge groove and the second gas discharge groove to separate the gas outlet groove, the first gas discharge groove and the second gas discharge groove, so that the gas outlet groove, the first gas discharge groove and the second gas discharge groove are independent of each other.
6. The molecular tower structure for increasing oxygen production according to claim 5, wherein the lower cover is provided at a side thereof with a first vent hole and a second vent hole communicating with the first vent groove and the second vent groove, respectively.
7. The molecular tower structure for increasing oxygen production according to claim 6, wherein an auxiliary exhaust valve is disposed outside the lower cover, the auxiliary exhaust valve comprises a first auxiliary exhaust hole and a second auxiliary exhaust hole which are communicated with the first exhaust hole and the second exhaust hole, and a second electromagnetic valve which controls the communication or disconnection between the first auxiliary exhaust hole and the second auxiliary exhaust hole.
8. The molecular tower structure for increasing oxygen production according to claim 7, wherein the adsorption tower A comprises an upper cover, an aluminum pipe and a lower cover, and a spring, a first filter sheet, a first filter paper, a molecular sieve, a second filter paper and a second filter sheet are sequentially arranged between the upper cover and the lower cover in the aluminum pipe.
9. The molecular tower structure for increasing oxygen production according to claim 1, wherein the first solenoid valve A and the first solenoid valve B have an operating time c, the operating time of the second electromagnetic valve is a, the first electromagnetic valve A and the first electromagnetic valve B are alternately started and stopped, so that the air inlet pipeline is communicated with the adsorption tower A or the adsorption tower B, in the switching process of the first electromagnetic valve A and the first electromagnetic valve B, the running ending time and the starting time interval of the adjacent first electromagnetic valve A and the first electromagnetic valve B are f, the working time period of the first electromagnetic valve A/the first electromagnetic valve B is d, the working time period of the second electromagnetic valve is B, d =2b, when the valve is started at the beginning, the first electromagnetic valve a is started after the second electromagnetic valve is started, and the delay time is e.
10. The molecular tower structure for increasing oxygen production according to claim 9, wherein a =2s, b =6.7s, c =7.4s, d =13.4s, e =1.1s, f = -0.7 s.
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