Oxygen production equipment, control method thereof and non-volatile computer readable storage medium

Abstract

The invention provides oxygen production equipment, a control method thereof and a nonvolatile computer readable storage medium, the oxygen production equipment comprises a compressor and a flow valve, and the control method comprises the steps that the current output oxygen concentration and the current output flow of the oxygen production equipment are obtained; whether the current output oxygen concentration is matched with the preset output oxygen concentration or not is judged, and if not, the rotating speed of the compressor is adjusted according to the oxygen concentration difference value of the current output oxygen concentration and the preset output oxygen concentration; judging whether the current output flow is matched with a preset output flow or not, and if not, adjusting the opening degree of a flow valve according to a flow difference value between the current output flow and the preset output flow; the adjusted output oxygen concentration is matched with the preset output oxygen concentration, and the adjusted output flow is matched with the preset output flow. In this way, the oxygen concentration and flow of the gas output by the oxygen generation equipment can be controlled to meet the requirements.

Description

Technical Field

[0001] This application relates to the technical field of oxygen generation equipment, and particularly to an oxygen generation equipment, its control method, and a non-volatile computer-readable storage medium. Background Art

[0002] Existing oxygen generation equipment generates compressed gas through a compressor. When the compressed gas flows through the molecular sieve, the molecular sieve adsorbs nitrogen to produce oxygen-rich gas. The higher the rotation speed of the compressor, the higher the oxygen concentration of the oxygen produced by the oxygen generation equipment. However, the oxygen generation equipment may use the same compressor rotation speed for oxygen generation in different flow rate gears, resulting in a relatively high compressor rotation speed in the low flow rate gear, a relatively high power consumption of the compressor, and a waste of energy; different flow rate gears may use corresponding fixed compressor rotation speeds for oxygen generation, resulting in a relatively long test process for matching different compressor rotation speeds for different gears. Summary of the Invention

[0003] The purpose of this application is to provide an oxygen generation equipment, its control method, and a non-volatile computer-readable storage medium, which can control the oxygen concentration and flow rate of the gas output by the oxygen generation equipment to meet the requirements.

[0004] In a first aspect, this application provides a control method for an oxygen generation equipment. The oxygen generation equipment includes a compressor and a flow valve. The control method includes: obtaining the current output oxygen concentration and the current output flow rate of the oxygen generation equipment; determining whether the current output oxygen concentration matches a preset output oxygen concentration. If not, adjusting the rotation speed of the compressor according to the oxygen concentration difference between the current output oxygen concentration and the preset output oxygen concentration; determining whether the current output flow rate matches a preset output flow rate. If not, adjusting the opening degree of the flow valve according to the flow rate difference between the current output flow rate and the preset output flow rate; so that the adjusted output oxygen concentration matches the preset output oxygen concentration, and the adjusted output flow rate matches the preset output flow rate.

[0005] In some embodiments, the control method further includes: obtaining the output flow rate after adjusting the rotation speed of the compressor; in response to the output flow rate after adjusting the rotation speed of the compressor not matching the preset output flow rate, adjusting the opening degree of the flow valve according to the flow rate difference between the output flow rate after adjusting the rotation speed of the compressor and the preset output flow rate.

[0006] In some embodiments, the control method further includes: obtaining the output oxygen concentration after adjusting the opening degree of the flow valve; in response to the output oxygen concentration after adjusting the opening degree of the flow valve not matching the preset output oxygen concentration, adjusting the rotation speed of the compressor according to the oxygen concentration difference between the output oxygen concentration after adjusting the opening degree of the flow valve and the preset output oxygen concentration.

[0007] In some embodiments, determining whether the current output oxygen concentration matches the preset output oxygen concentration includes: obtaining the oxygen concentration difference between the current output oxygen concentration and the preset output oxygen concentration; in response to the oxygen concentration difference being greater than or equal to a first threshold, confirming that the current output oxygen concentration does not match the preset output oxygen concentration; in response to the oxygen concentration difference being less than the first threshold, confirming that the current output oxygen concentration matches the preset output oxygen concentration.

[0008] In some embodiments, adjusting the rotational speed of the compressor according to the oxygen concentration difference between the current output oxygen concentration and the preset output oxygen concentration includes: performing an integral operation on the oxygen concentration difference to obtain an oxygen concentration integral value at the current moment; performing a proportional operation on the oxygen concentration difference to obtain a proportional product corresponding to the oxygen concentration difference; taking the sum of the oxygen concentration integral value at the current moment and the proportional product corresponding to the oxygen concentration difference as the rotational speed of the compressor; adjusting the compressor according to the rotational speed of the compressor.

[0009] In some embodiments, performing an integral operation on the oxygen concentration difference to obtain an oxygen concentration integral value at the current moment includes: determining a first product of the oxygen concentration difference and a first integral coefficient; taking the sum of the first product and the oxygen concentration integral value at the previous moment as the oxygen concentration integral value at the current moment.

[0010] In some embodiments, performing a proportional operation on the oxygen concentration difference to obtain a proportional product corresponding to the oxygen concentration difference includes: determining a second product of the oxygen concentration difference and a first proportional coefficient as the proportional product corresponding to the oxygen concentration difference.

[0011] In some embodiments, determining whether the current output flow rate matches the preset output flow rate includes: obtaining the flow rate difference between the current output flow rate and the preset output flow rate; in response to the flow rate difference being greater than or equal to a second threshold, confirming that the current output flow rate does not match the preset output flow rate; in response to the flow rate difference being less than the second threshold, confirming that the current output flow rate matches the preset output flow rate.

[0012] In some embodiments, adjusting the opening degree of the flow valve according to the flow rate difference between the current output flow rate and the preset output flow rate includes: performing an integral operation on the flow rate difference to obtain a flow rate integral value at the current moment; performing a proportional operation on the flow rate difference to obtain a proportional product corresponding to the flow rate difference; taking the sum of the flow rate integral value at the current moment and the proportional product corresponding to the flow rate difference as the opening degree of the flow valve; adjusting the flow valve according to the opening degree of the flow valve.

[0013] In some embodiments, the integrating the flow difference to obtain the flow integral value at the current moment includes: determining a third product of the flow difference and a second integral coefficient; and using the sum of the third product and the flow integral value at the previous moment as the flow integral value at the current moment.

[0014] In some embodiments, the performing a proportional operation on the flow difference to obtain a proportional product corresponding to the flow difference includes: determining a fourth product of the flow difference and a second proportional coefficient as the proportional product corresponding to the flow difference.

[0015] In some embodiments, the control method further includes: obtaining the current oxygen concentration level and the current flow rate level of the oxygen generation device; controlling the compressor to operate at a preset speed corresponding to the current oxygen concentration level based on the current oxygen concentration level, and controlling the flow valve to operate at a preset opening corresponding to the current flow rate level based on the current flow rate level; obtaining an oxygen concentration difference between the current output oxygen concentration and a preset output oxygen concentration corresponding to the current oxygen concentration level, and a flow difference between the current output flow rate and a preset output flow rate corresponding to the current flow rate level; and completing pre-startup of the oxygen generation device in response to the oxygen concentration difference being less than a first threshold and the flow difference being less than a second threshold within a preset time.

[0016] In a second aspect, the present application provides an oxygen generation device, including a compressor, a flow valve, and a control device. The control device is connected to the compressor and the flow valve. The control device includes: a memory for storing program instructions; and a processor for executing the program instructions to implement the control method of the oxygen generation device in any of the above embodiments.

[0017] In some embodiments, the oxygen generation device further includes a detection sensor connected to the control device. The detection sensor is used to detect the current output oxygen concentration and the current output flow rate. The detection sensor is disposed between the flow valve and the oxygen outlet of the oxygen generation device and close to the oxygen outlet.

[0018] In a third aspect, the present application provides a non-volatile computer-readable storage medium, on which program instructions are stored. When the program instructions are executed by a processor, the control method of the oxygen generation device in any of the above embodiments is implemented.

[0019] The control method of the oxygen generation device provided by the present application obtains the current output oxygen concentration and the current output flow rate of the oxygen generation device. When the current output oxygen concentration does not match the preset output oxygen concentration, the rotation speed of the compressor is adjusted according to the oxygen concentration difference between the current output oxygen concentration and the preset output oxygen concentration. When the current output flow rate does not match the preset output flow rate, the opening degree of the flow valve is adjusted according to the flow rate difference between the current output flow rate and the preset output flow rate, so as to realize the control of the oxygen generation device, so that the adjusted output oxygen concentration matches the preset output oxygen concentration, and the adjusted output flow rate matches the preset output flow rate. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings.

[0021] Figure 1 It is a schematic structural diagram of an embodiment of the oxygen generation device provided by the present application.

[0022] Figure 2 It is a schematic flow chart of an embodiment of the control method of the oxygen generation device provided by the present application.

[0023] Figure 3 It is a schematic flow chart of another embodiment of the control method of the oxygen generation device provided by the present application.

[0024] Figure 4 For Figure 2 It is a schematic flow chart of an embodiment of step S102 in

[0025] Figure 5 For Figure 2 It is a schematic flow chart of an embodiment of step S103 in

[0026] Figure 6 It is a schematic structural diagram of an embodiment of the control device provided by the present application.

[0027] Figure 7 It is a schematic structural diagram of an embodiment of the non-volatile computer-readable storage medium provided by the present application. Detailed Embodiments

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs; the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0030] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this application, "a plurality of" means two or more unless otherwise specifically defined.

[0031] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive of other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0032] In the description of the embodiments of this application, the term "and / or" is merely a description of the associated relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0033] In the description of the embodiments of this application, the term "a plurality of" means two or more (including two). Similarly, "a plurality of groups" means two or more groups (including two groups), and "a plurality of pieces" means two or more pieces (including two pieces).

[0034] In the description of the embodiments of this application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of this application can be understood according to specific circumstances.

[0035] Please refer to Figure 1 , Figure 1Schematic structural diagram of an embodiment of the oxygen generation device provided by the present application. The oxygen generation device 1 includes a compressor 11, a flow valve 12, a detection sensor 14, and a molecular sieve tower 15. The compressor 11, the molecular sieve tower 15, the flow valve 12, and the detection sensor 14 are connected in sequence. The compressor 11 is used to generate compressed gas, and the compressed gas flows from the compressor 11 to the molecular sieve tower 15. The molecular sieve tower 15 is used to adsorb nitrogen in the compressed gas to produce an output gas rich in oxygen. The output gas passes through the flow valve 12 and the detection sensor 14 and is output from the oxygen outlet 10 of the oxygen generation device 1. Among them, the detection sensor 14 is used to detect the oxygen concentration and flow rate of the flowing output gas.

[0036] Please refer to Figure 2 , Figure 2 Schematic flowchart of an embodiment of the control method of the oxygen generation device provided by the present application. The control method is used to control the above-mentioned oxygen generation device 1. The control method includes the following steps.

[0037] Step S101, obtain the current output oxygen concentration and the current output flow rate of the oxygen generation device.

[0038] Obtain the current output oxygen concentration and the current output flow rate of the output gas output after passing through the compressor 11 and the flow valve 12 detected by the detection sensor 14. The detection sensor 14 can detect the flowing output gas at intervals of a preset time to obtain the current output oxygen concentration and the current output flow rate at the current moment. The preset time can be, for example, 1 second or 2 seconds, etc., and is not limited herein.

[0039] Step S102, determine whether the current output oxygen concentration matches the preset output oxygen concentration. If not, adjust the rotational speed of the compressor according to the oxygen concentration difference between the current output oxygen concentration and the preset output oxygen concentration.

[0040] Based on the preset output oxygen concentration, judge the current output oxygen concentration. If the current output oxygen concentration matches the preset output oxygen concentration, it means that the current output oxygen concentration meets the actual demand; if the current output oxygen concentration does not match the preset output oxygen concentration, it means that the current output oxygen concentration does not meet the actual demand. When the current output oxygen concentration does not match the preset output oxygen concentration, adjust the rotational speed of the compressor 11 according to the oxygen concentration difference between the current output oxygen concentration and the preset output oxygen concentration. Among them, the preset output oxygen concentration can be set according to actual needs. For example, the preset output oxygen concentration is 90%, or any value greater than 90% for the preset output oxygen concentration, and is not limited herein.

[0041] In some embodiments, the preset output oxygen concentration can be set according to the oxygen concentration gear of the oxygen generator 1. For example, each oxygen concentration gear corresponds to a preset output oxygen concentration. When the oxygen generator 1 is adjusted to a certain oxygen concentration gear, it is determined whether the current output oxygen concentration matches the preset output oxygen concentration corresponding to this oxygen concentration gear. If so, it means that the current output oxygen concentration meets the requirements of the current oxygen concentration gear; if not, it means that the current output oxygen concentration does not meet the requirements of the current oxygen concentration gear. Setting different preset output oxygen concentrations for different oxygen concentration gears can intelligently adjust the power consumption of the compressor 11, which is beneficial to energy conservation. At the same time, there is no need to conduct tests on different models of oxygen generators 1 for a long time, saving time costs.

[0042] Step S103, determine whether the current output flow rate matches the preset output flow rate. If not, adjust the opening degree of the flow valve according to the flow rate difference between the current output flow rate and the preset output flow rate.

[0043] Based on the preset output flow rate, the current output flow rate is judged. If the current output flow rate matches the preset output flow rate, it means that the current output flow rate meets the conditions; if the current output flow rate does not match the preset output flow rate, it means that the current output flow rate does not meet the conditions. When the current output flow rate does not match the preset output flow rate, the opening degree of the flow valve 12 is adjusted according to the flow rate difference between the current output flow rate and the preset output flow rate. Among them, the preset output flow rate can be set according to actual needs. For example, the preset output flow rate is 2 liters per minute, or the preset output flow rate is greater than 2 liters per minute, which is not limited here.

[0044] In some embodiments, the preset output flow rate can be set according to the flow rate gear of the oxygen generator 1. For example, each flow rate gear corresponds to a preset output flow rate. When the oxygen generator 1 is adjusted to a certain flow rate gear, it is determined whether the current output flow rate matches the preset output flow rate corresponding to this flow rate gear. If so, it means that the current output flow rate meets the requirements of the current flow rate gear; if not, it means that the current output flow rate does not meet the requirements of the current flow rate gear. Setting different preset output flow rates for different flow rate gears does not require long-term testing of different models of oxygen generators 1, saving time costs.

[0045] Adjust the rotational speed of the compressor 11 and / or the opening degree of the flow valve 12 so that the adjusted output oxygen concentration matches the preset output oxygen concentration, and the adjusted output flow rate matches the preset output flow rate. The rotational speed of the compressor 11 affects both the flow rate of the compressed gas generated and the pressure of the molecular sieve tower 15, thereby affecting the oxygen concentration and flow rate of the output gas. The opening degree of the flow valve 12 affects both the flow rate and oxygen concentration of the output gas. Therefore, adjusting the rotational speed of the compressor 11 and the opening degree of the flow valve 12 can both achieve the regulation of the output gas of the oxygen generation device 1, so that the oxygen concentration and flow rate of the output gas can meet the actual requirements.

[0046] This application obtains the current output oxygen concentration and the current output flow rate of the oxygen generation device 1. When the current output oxygen concentration does not match the preset output oxygen concentration, adjust the rotational speed of the compressor 11 according to the oxygen concentration difference between the current output oxygen concentration and the preset output oxygen concentration. When the current output flow rate does not match the preset output flow rate, adjust the opening degree of the flow valve 12 according to the flow rate difference between the current output flow rate and the preset output flow rate, so as to realize the control of the oxygen generation device 1, so that the adjusted output oxygen concentration matches the preset output oxygen concentration, and the adjusted output flow rate matches the preset output flow rate.

[0047] Adjusting the rotational speed of the compressor 11 according to the oxygen concentration difference between the current output oxygen concentration and the preset output oxygen concentration can accurately control the output oxygen concentration. Adjusting the opening degree of the flow valve 12 according to the flow rate difference between the current output flow rate and the preset output flow rate can accurately control the output flow rate, thereby realizing the closed-loop control of the oxygen concentration and flow rate. Adjusting the rotational speed of the compressor 11 and the opening degree of the flow valve 12 complement each other, and can better control the output oxygen concentration and flow rate, thereby improving the control efficiency and accuracy.

[0048] Whether the compressor 11 is aging, the airtightness of the components in the oxygen generation device 1 is reduced, the gas flow pipeline in the oxygen generation device 1 is blocked, or in a high-altitude scenario, the control method of the oxygen generation device 1 can automatically increase or decrease the rotational speed of the compressor 11 and / or increase or decrease the opening degree of the flow valve 12, so that the adjusted output oxygen concentration of the oxygen generation device 1 matches the preset output oxygen concentration, and the adjusted output flow rate matches the preset output flow rate.

[0049] In some embodiments, determining whether the current output oxygen concentration matches the preset output oxygen concentration in step S102 includes: obtaining the oxygen concentration difference between the current output oxygen concentration and the preset output oxygen concentration; in response to the oxygen concentration difference being greater than or equal to the first threshold, confirming that the current output oxygen concentration does not match the preset output oxygen concentration; in response to the oxygen concentration difference being less than the first threshold, confirming that the current output oxygen concentration matches the preset output oxygen concentration.

[0050] Take the preset output oxygen concentration as the given value and the current output oxygen concentration as the feedback value. Obtain the oxygen concentration difference between the current output oxygen concentration and the preset output oxygen concentration, that is, calculate the difference between the current output oxygen concentration and the preset output oxygen concentration as the oxygen concentration difference. Determine whether the oxygen concentration difference is less than the first threshold. When the oxygen concentration difference is less than the first threshold, confirm that the current output oxygen concentration matches the preset output oxygen concentration; when the oxygen concentration difference is greater than or equal to the first threshold, confirm that the current output oxygen concentration does not match the preset output oxygen concentration. Among them, the first threshold can be 3%, and the specific value of the first threshold can also be set according to the actual situation and is not limited here.

[0051] In some embodiments, obtaining the oxygen concentration difference between the current output oxygen concentration and the preset output oxygen concentration can be expressed by Formula 1, and Formula 1 is: Cerr = Cset - Creal. Wherein, Cerr represents the oxygen concentration difference, Cset represents the preset output oxygen concentration, and Creal represents the output oxygen concentration.

[0052] In some embodiments, determining whether the current output flow rate matches the preset output flow rate in step S103 includes: obtaining the flow rate difference between the current output flow rate and the preset output flow rate; in response to the flow rate difference being greater than or equal to the second threshold, confirm that the current output flow rate does not match the preset output flow rate; in response to the flow rate difference being less than the second threshold, confirm that the current output flow rate matches the preset output flow rate.

[0053] Take the preset output flow rate as the given value and the current output flow rate as the feedback value. Obtain the flow rate difference between the current output flow rate and the preset output flow rate, that is, calculate the difference between the current output flow rate and the preset output flow rate as the flow rate difference. Determine whether the flow rate difference is less than the second threshold. When the flow rate difference is less than the second threshold, confirm that the current output flow rate matches the preset output flow rate; when the flow rate difference is greater than or equal to the second threshold, confirm that the current output flow rate does not match the preset output flow rate. Among them, the second threshold can be 0.2 liters per minute, and the specific value of the second threshold can also be set according to the actual situation and is not limited here.

[0054] In some embodiments, obtaining the flow rate difference between the current output flow rate and the preset output flow rate can be expressed by Formula 2, and Formula 2 is: Lerr = Lset - Lreal. Wherein, Lerr represents the flow rate difference, Lset represents the preset output flow rate, and Lreal represents the output flow rate.

[0055] Please refer to Figure 3 , Figure 3 which is a schematic flowchart of another embodiment of the control method of the oxygen generation device provided by this application. The control method of the oxygen generation device further includes the following steps.

[0056] Step S201: Obtain the current oxygen concentration level and the current flow rate level of the oxygen generation device.

[0057] The oxygen generation device 1 is provided with multiple oxygen concentration levels and multiple flow rate levels. When the oxygen generation device 1 is adjusted to a certain oxygen concentration level, this oxygen concentration level is the current oxygen concentration level. When the oxygen generation device 1 is adjusted to a certain flow rate level, this flow rate level is the current flow rate level.

[0058] Step S202: Based on the current oxygen concentration level, control the compressor to operate at a preset speed corresponding to the current oxygen concentration level, and based on the current flow rate level, control the flow valve to operate at a preset opening corresponding to the current flow rate level.

[0059] Each oxygen concentration level corresponds to a preset speed. Control the compressor 11 to operate at the preset speed corresponding to the current oxygen concentration level. Each flow rate level corresponds to a preset opening. Control the flow valve 12 to operate at the preset opening corresponding to the current flow rate level.

[0060] Step S203: Obtain the oxygen concentration difference between the current output oxygen concentration and the preset output oxygen concentration corresponding to the current oxygen concentration level, and the flow rate difference between the current output flow rate and the preset output flow rate corresponding to the current flow rate level.

[0061] Calculate the difference between the current output oxygen concentration and the preset output oxygen concentration corresponding to the current oxygen concentration level as the oxygen concentration difference, and calculate the difference between the current output flow rate and the preset output flow rate corresponding to the current flow rate level as the flow rate difference.

[0062] Step S204: In response to the oxygen concentration difference being less than the first threshold and the flow rate difference being less than the second threshold within a preset time, complete the pre-startup of the oxygen generation device.

[0063] Within the preset time, if the oxygen concentration difference is less than the first threshold and the flow rate difference is less than the second threshold, it indicates that the oxygen generation device 1 has completed the pre-startup. It can be understood that before adjusting the speed of the compressor 11, the compressor 11 continues to operate at the preset speed corresponding to the current oxygen concentration level; before adjusting the opening of the flow valve 12, the flow valve 12 continues to operate at the preset opening corresponding to the current flow rate level. Among them, the preset time can be 3 minutes, which is not limited here.

[0064] In some embodiments, when the operating time of the compressor 11 and / or the flow valve 12 exceeds the preset time, it is considered that the oxygen generation device 1 has completed the pre-startup.

[0065] In some embodiments, if the oxygen generation device 1 adjusts the oxygen concentration gear during operation, the compressor 11 first operates at a preset speed corresponding to the current oxygen concentration gear, and then adjusts according to the current output oxygen concentration and the preset output oxygen concentration. Correspondingly, if the oxygen generation device 1 adjusts the flow rate gear during operation, the flow valve 12 first operates at a preset opening corresponding to the current flow rate gear, and then adjusts according to the current output flow rate and the preset output flow rate.

[0066] In some embodiments, the control method of the oxygen generation device further includes: obtaining the output flow rate after adjusting the speed of the compressor 11; in response to the output flow rate after adjusting the speed of the compressor 11 not matching the preset output flow rate, adjusting the opening of the flow valve 12 according to the flow rate difference between the output flow rate after adjusting the speed of the compressor 11 and the preset output flow rate.

[0067] Since the speed of the compressor 11 affects the flow rate, after each adjustment of the speed of the compressor 11, it is necessary to obtain the output flow rate to determine whether it is necessary to adjust the flow valve 12. Obtain the output flow rate after adjusting the speed of the compressor 11, and determine whether the output flow rate after adjusting the speed of the compressor 11 matches the preset output flow rate. When the output flow rate after adjusting the speed of the compressor 11 does not match the preset output flow rate, adjust the opening of the flow valve 12 according to the flow rate difference between the output flow rate after adjusting the speed of the compressor 11 and the preset output flow rate.

[0068] In some embodiments, the control method of the oxygen generation device further includes: obtaining the output oxygen concentration after adjusting the opening of the flow valve 12; in response to the output oxygen concentration after adjusting the opening of the flow valve 2 not matching the preset output oxygen concentration, adjusting the speed of the compressor 11 according to the oxygen concentration difference between the output oxygen concentration after adjusting the opening of the flow valve 12 and the preset output oxygen concentration.

[0069] Since the opening of the flow valve 12 affects the oxygen concentration, after each adjustment of the opening of the flow valve 12, it is necessary to obtain the output oxygen concentration to determine whether it is necessary to adjust the compressor 11. Obtain the output oxygen concentration after adjusting the opening of the flow valve 12, and determine whether the output oxygen concentration after adjusting the opening of the flow valve 12 matches the preset output oxygen concentration. When the output oxygen concentration after adjusting the opening of the flow valve 2 does not match the preset output oxygen concentration, adjust the speed of the compressor 11 according to the oxygen concentration difference between the output oxygen concentration after adjusting the opening of the flow valve 12 and the preset output oxygen concentration.

[0070] This application obtains the output flow rate after adjusting the rotational speed of the compressor 11, and obtains the output oxygen concentration after adjusting the opening degree of the flow control valve 12. Based on the flow rate after adjusting the rotational speed of the compressor 11, the flow control valve 12 is adjusted. Based on the oxygen concentration after adjusting the opening degree of the flow control valve 12, the compressor 11 is adjusted. It can dynamically adjust the rotational speed of the compressor 11 and the opening degree of the flow control valve 12, so that the finally adjusted output oxygen concentration matches the preset output oxygen concentration, and the finally adjusted output flow rate matches the preset output flow rate.

[0071] Please refer to Figure 4 , Figure 4 which Figure 2 is a schematic flowchart of an embodiment of step S102 in

[0072] Step S301, perform an integral operation on the oxygen concentration difference to obtain the oxygen concentration integral value at the current moment.

[0073] Step S302, perform a proportional operation on the oxygen concentration difference to obtain the proportional product corresponding to the oxygen concentration difference.

[0074] Step S303, use the sum of the oxygen concentration integral value at the current moment and the proportional product corresponding to the oxygen concentration difference as the rotational speed of the compressor.

[0075] Calculate the sum of the oxygen concentration integral value at the current moment and the proportional product corresponding to the oxygen concentration difference as the rotational speed of the compressor 11.

[0076] In some embodiments, there is a mapping relationship between the sum of the oxygen concentration integral value at the current moment and the proportional product corresponding to the oxygen concentration difference and the rotational speed of the compressor 11. Based on the sum of the oxygen concentration integral value at the current moment and the proportional product corresponding to the oxygen concentration difference, the corresponding rotational speed of the compressor 11 can be obtained.

[0077] Step S304, adjust the compressor according to the rotational speed of the compressor.

[0078] Adjust the compressor 11 according to the rotational speed of the compressor 11, so that the compressor 11 operates at the obtained rotational speed. Among them, the range of the rotational speed of the compressor 11 can be 1000 revolutions - 5000 revolutions, which is not limited here.

[0079] This application performs proportional-integral operation on the oxygen concentration difference, and obtains the rotational speed of the compressor 11 in the way of proportional-integral operation, so as to adjust the compressor 11 according to the rotational speed of the compressor 11. Based on the oxygen concentration difference between the preset output oxygen concentration and the current output oxygen concentration to adjust the rotational speed of the compressor 11 can accurately control the output of the oxygen concentration. Through integral operation, a part of the output is obtained by integrating the oxygen concentration difference, and through proportional operation, the oxygen concentration difference is converted into another part of the output. The combination of integral operation and proportional operation enables the compressor 11 to quickly reach the expected working state, eliminate the steady-state error at the same time, and improve the accuracy of control.

[0080] In some embodiments, step S301 includes: determining a first product of the oxygen concentration difference and a first integral coefficient; taking the sum of the first product and the oxygen concentration integral value at the previous moment as the oxygen concentration integral value at the current moment.

[0081] Calculate the product of the oxygen concentration difference and the first integral coefficient as the first product, and calculate the sum of the first product and the oxygen concentration integral value at the previous moment as the oxygen concentration integral value at the current moment. The oxygen concentration integral value at the previous moment represents the cumulative value of the products of the oxygen concentration differences and the first integral coefficient at all moments up to the previous moment; the oxygen concentration integral value at the current moment represents the cumulative value of the products of the oxygen concentration differences and the first integral coefficient at all moments up to the current moment. Among them, the specific value of the first integral coefficient can be set according to actual needs and is not limited here. It can be understood that when the oxygen concentration difference is zero, that is, the current output oxygen concentration is equal to the preset output oxygen concentration, the first product is zero, and the oxygen concentration integral value at the current moment is equal to the oxygen concentration integral value at the previous moment. In this case, the integral action stops.

[0082] In some embodiments, step S301 can be represented by Formula 3, and Formula 3 is: Integralc = Kic × Cerr + Intgeral0c. Where Integralc represents the oxygen concentration integral value at the current moment, Kic represents the first integral coefficient, Cerr represents the oxygen concentration difference, and Intgeral0c represents the oxygen concentration integral value at the previous moment.

[0083] This application determines the first product of the oxygen concentration difference and the first integral coefficient, and takes the sum of the first product and the oxygen concentration integral value at the previous moment as the oxygen concentration integral value at the current moment, and accumulates the oxygen concentration difference through integral operation to eliminate the steady-state error.

[0084] In some embodiments, step S302 includes: determining a second product of the oxygen concentration difference and a first proportional coefficient as the proportional product corresponding to the oxygen concentration difference.

[0085] Calculate the product of the oxygen concentration difference and the first proportionality coefficient as the second product, and use the second product as the proportional product corresponding to the oxygen concentration difference. The specific value of the first proportionality coefficient can be set according to actual needs and is not limited here.

[0086] In some embodiments, steps S302 and S303 can be represented by Formula 4: Outc = Kpc × Cerr + Integralc. Where Outc represents the rotational speed of the compressor 11, Kpc represents the first proportionality coefficient, Cerr represents the oxygen concentration difference, and Integralc represents the oxygen concentration integral value at the current moment.

[0087] This application determines the second product of the oxygen concentration difference and the first proportionality coefficient as the proportional product corresponding to the oxygen concentration difference, and quickly responds to the oxygen concentration difference through proportional operation, enabling the rotational speed of the compressor 11 to change in the direction of reducing the oxygen concentration difference, thereby improving the accuracy of control.

[0088] Please refer to Figure 5 , Figure 5 For Figure 2 a schematic flowchart of an embodiment of step S103 in

[0089] Step S401: Perform an integral operation on the flow rate difference to obtain the flow rate integral value at the current moment.

[0090] Step S402: Perform a proportional operation on the flow rate difference to obtain the proportional product corresponding to the flow rate difference.

[0091] Step S403: Use the sum of the flow rate integral value at the current moment and the proportional product corresponding to the flow rate difference as the opening degree of the flow valve.

[0092] Calculate the sum of the flow rate integral value at the current moment and the proportional product corresponding to the flow rate difference as the opening degree of the flow valve 12.

[0093] In some embodiments, there is a mapping relationship between the sum of the flow rate integral value at the current moment and the proportional product corresponding to the flow rate difference and the opening degree of the flow valve 12, and the corresponding opening degree of the flow valve 12 can be obtained based on the sum of the flow rate integral value at the current moment and the proportional product corresponding to the flow rate difference.

[0094] Step S404: Control the flow valve according to the opening degree of the flow valve.

[0095] Adjust the flow valve 12 according to the opening degree of the flow valve 12, so that the flow valve 12 works according to the obtained opening degree. Among them, the range of the opening degree of the flow valve 12 is 0° to 360°. When the opening degree of the flow valve 12 is 0°, the flow valve 12 is in the closed state; when the opening degree of the flow valve 12 is 360°, the flow valve 12 is in the fully open state.

[0096] The present application performs proportional-integral operation on the flow difference, and obtains the opening degree of the flow valve 12 in the way of proportional-integral operation, so as to adjust the flow valve 12 according to the opening degree of the flow valve 12. Adjusting the opening degree of the flow valve 12 based on the flow difference between the preset output flow and the current output flow can accurately control the output of the flow. Through integral operation, a part of the output is obtained by integrating the flow difference, and through proportional operation, the oxygen concentration difference is converted into another part of the output. The combination of integral operation and proportional operation enables the flow valve 12 to quickly reach the expected working state, while eliminating the steady-state error and improving the accuracy of control.

[0097] In some embodiments, step S401 includes: determining the third product of the flow difference and the second integral coefficient; using the sum of the third product and the flow integral value at the previous moment as the flow integral value at the current moment.

[0098] Calculate the product of the flow difference and the second integral coefficient as the third product, and calculate the sum of the third product and the flow integral value at the previous moment as the flow integral value at the current moment. The flow integral value at the previous moment represents the cumulative value of the product of the flow difference and the second integral coefficient at all moments up to the previous moment; the flow integral value at the current moment represents the cumulative value of the product of the flow difference and the second integral coefficient at all moments up to the current moment. Among them, the specific value of the second integral coefficient can be set according to actual needs and is not limited here. It can be understood that when the flow difference is zero, that is, the current output flow is equal to the preset output flow, the third product is zero, and the flow integral value at the current moment is equal to the flow integral value at the previous moment. In this case, the integral action stops.

[0099] In some embodiments, step S401 can be represented by formula five, and formula five is: Integrall = Kil × Lerr + Intgeral0l. Where Integral represents the flow integral value at the current moment, Kil represents the second integral coefficient, Lerr represents the flow difference, and Intgeral0l represents the flow integral value at the previous moment.

[0100] The present application determines the third product of the flow difference and the second integral coefficient, and uses the sum of the third product and the flow integral value at the previous moment as the flow integral value at the current moment, and accumulates the flow difference through integral operation to eliminate the steady-state error.

[0101] In some embodiments, step S402 includes: determining a fourth product of the flow difference and the second proportionality coefficient as the proportional product corresponding to the flow difference.

[0102] Calculate the product of the flow difference and the second proportionality coefficient as the fourth product, and use the fourth product as the proportional product corresponding to the flow difference. The specific value of the second proportionality coefficient can be set according to actual requirements and is not limited herein.

[0103] In some embodiments, step S402 and step S403 can be represented by Formula 6, where Formula 6 is: Outl = Kpl × Lerr + Integral. Here, Outl represents the opening degree of the flow valve 12, Kpl represents the second proportionality coefficient, Lerr represents the flow difference, and Integrall represents the flow integral value at the current moment.

[0104] In this application, by determining the fourth product of the flow difference and the second proportionality coefficient as the proportional product corresponding to the flow difference, and quickly responding to the flow difference through proportional operation, the opening degree of the flow valve 12 can change in the direction of reducing the flow difference, thereby improving the control accuracy.

[0105] Please refer to Figure 1 and Figure 6 , Figure 6 which is a schematic structural diagram of an embodiment of the control device provided by this application. The oxygen generation device 1 includes a compressor 11, a flow valve 12, and a control device 13. The control device 13 is connected to the compressor 11 and the flow valve 12. The control device 13 includes a memory 131 and a processor 132. The memory 131 is used to store program instructions, and the processor 132 is used to execute the program instructions to implement the control method of the oxygen generation device in any of the above embodiments.

[0106] In some embodiments, the control device 13 can be electrically connected to the compressor 11 and the flow valve 12, or the control device 13 can be communicatively connected to the compressor 11 and the flow valve 12.

[0107] In some embodiments, the flow valve 12 can be an electromagnetic flow valve. The control device 13 can be a PI controller (proportional integral controller), and the control device 13 includes a discrete-time system that can sample and encode the continuous output oxygen concentration and output flow at a certain time interval.

[0108] In some embodiments, the oxygen generation device 1 further includes a detection sensor 14 connected to the control device 13. The detection sensor 14 is used to detect the current output oxygen concentration and the current output flow. The detection sensor 14 is disposed between the flow valve 12 and the oxygen outlet 10 of the oxygen generation device 1 and is close to the oxygen outlet 10.

[0109] The oxygen generation device 1 includes a compressor 11, a molecular sieve tower 15, a flow valve 12, a detection sensor 14, and an oxygen outlet 10 that are connected in sequence. The detection sensor 14 is disposed between the flow valve 12 and the oxygen outlet 10 and is disposed close to the oxygen outlet 10. The closer the detection sensor 14 is to the oxygen outlet 10, the closer the currently detected output oxygen concentration and the currently detected output flow rate are to the oxygen concentration and the flow rate of the output gas provided to the user of the oxygen generation device 1. In this case, the adjustment of the compressor 11 based on the currently detected output oxygen concentration and the preset output oxygen concentration, and the adjustment of the flow valve 12 based on the currently detected output flow rate and the preset output flow rate can be more accurate.

[0110] In some embodiments, the detection sensor 14 is communicatively connected to the control device 13. The detection sensor 14 can be an oxygen concentration and flow meter.

[0111] Please refer to Figure 7 , Figure 7 which is a schematic structural diagram of an embodiment of the non-volatile computer-readable storage medium provided by the present application. Program instructions 21 are stored on the non-volatile computer-readable storage medium 2. When the program instructions 21 are executed by a processor, the steps of the control method of any of the above oxygen generation devices are implemented.

[0112] The above solution provides a control method for an oxygen generation device, including: obtaining the currently detected output oxygen concentration and the currently detected output flow rate of the oxygen generation device; determining whether the currently detected output oxygen concentration matches the preset output oxygen concentration. If not, adjusting the rotational speed of the compressor according to the oxygen concentration difference between the currently detected output oxygen concentration and the preset output oxygen concentration; determining whether the currently detected output flow rate matches the preset output flow rate. If not, adjusting the opening degree of the flow valve according to the flow rate difference between the currently detected output flow rate and the preset output flow rate; so that the adjusted output oxygen concentration matches the preset output oxygen concentration, and the adjusted output flow rate matches the preset output flow rate.

[0113] In some embodiments, the functions or modules included in the device provided by the embodiments of the present application can be used to execute the methods described in the above method embodiments. The specific implementation can refer to the description of the above method embodiments. For the sake of brevity, it will not be repeated here.

[0114] The descriptions of the above embodiments tend to emphasize the differences between the embodiments. The same or similar parts can be referred to each other. For the sake of brevity, they will not be repeated in this article.

[0115] In several embodiments provided in the present application, it should be understood that the disclosed methods and apparatuses can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For example, the division of modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections between each other can be through some interfaces. The indirect couplings or communication connections of devices or units can be in electrical, mechanical or other forms.

[0116] In addition, in each embodiment of the present application, each functional unit can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

[0117] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods in each embodiment of the present application. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0118] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of each embodiment of the present application, and they should all be covered by the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A control method for oxygen production equipment, characterized in that: The oxygen production equipment includes a compressor and a flow valve, and the control method includes: Obtaining the current output oxygen concentration and current output flow rate of the oxygen production equipment; Determining whether the current output oxygen concentration matches the preset output oxygen concentration, and if not, adjusting the speed of the compressor according to the oxygen concentration difference between the current output oxygen concentration and the preset output oxygen concentration; Determining whether the current output flow rate matches the preset output flow rate, and if not, adjusting the opening of the flow valve according to the flow difference between the current output flow rate and the preset output flow rate; So that the adjusted output oxygen concentration matches the preset output oxygen concentration, and the adjusted output flow rate matches the preset output flow rate.

2. The control method of oxygen production equipment according to claim 1, characterized in that: Also includes: Obtaining the output flow after adjusting the speed of the compressor; In response to the output flow after adjusting the speed of the compressor not matching the preset output flow, the opening of the flow valve is adjusted according to the flow difference between the output flow after adjusting the speed of the compressor and the preset output flow.

3. The control method of oxygen production equipment according to claim 1, characterized in that: Also includes: Obtaining the output oxygen concentration after adjusting the opening of the flow valve; In response to the output oxygen concentration after adjusting the opening of the flow valve not matching the preset output oxygen concentration, the speed of the compressor is adjusted according to the oxygen concentration difference between the output oxygen concentration after adjusting the opening of the flow valve and the preset output oxygen concentration.

4. The control method of oxygen production equipment according to claim 1, characterized in that: The determining whether the current output oxygen concentration matches the preset output oxygen concentration includes: Obtaining the oxygen concentration difference between the current output oxygen concentration and the preset output oxygen concentration; In response to the oxygen concentration difference being greater than or equal to a first threshold, confirming that the current output oxygen concentration does not match the preset output oxygen concentration; In response to the oxygen concentration difference being less than the first threshold, it is confirmed that the current output oxygen concentration matches the preset output oxygen concentration.

5. The control method of oxygen production equipment according to claim 1, characterized in that: The adjusting the speed of the compressor according to the oxygen concentration difference between the current output oxygen concentration and the preset output oxygen concentration includes: Performing an integration operation on the oxygen concentration difference to obtain an integrated value of the oxygen concentration at the current moment; Performing a proportional operation on the oxygen concentration difference to obtain a proportional product corresponding to the oxygen concentration difference; taking the sum of the product of the integral value of the oxygen concentration at the current moment and the proportional value corresponding to the oxygen concentration difference as the rotation speed of the compressor; The compressor is regulated according to the rotational speed of the compressor.

6. The control method of the oxygen production equipment according to claim 5, characterized in that: The step of performing an integration operation on the oxygen concentration difference to obtain an integrated value of the oxygen concentration at the current moment includes: determining a first product of the oxygen concentration difference and a first integral coefficient; taking the sum of the first product and the oxygen concentration integral value at the previous moment as the oxygen concentration integral value at the current moment; The performing a proportional operation on the oxygen concentration difference to obtain a proportional product corresponding to the oxygen concentration difference includes: A second product of the oxygen concentration difference and the first proportional coefficient is determined as the proportional product corresponding to the oxygen concentration difference.

7. The control method of oxygen production equipment according to claim 1, characterized in that: The determining whether the current output flow matches the preset output flow includes: Obtaining the flow difference between the current output flow and the preset output flow; In response to the flow difference being greater than or equal to a second threshold, confirming that the current output flow does not match the preset output flow; In response to the flow difference being less than the second threshold, it is confirmed that the current output flow matches the preset output flow.

8. The control method of oxygen production equipment according to claim 1, characterized in that: The adjusting the opening of the flow valve according to the flow difference between the current output flow and the preset output flow comprises: Performing an integration operation on the flow difference to obtain a flow integral value at the current moment; Performing a proportional operation on the flow difference to obtain a proportional product corresponding to the flow difference; The sum of the proportional products of the flow integral value at the current moment and the flow difference value is taken as the opening of the flow valve; The flow valve is adjusted according to the opening degree of the flow valve.

9. The control method of oxygen production equipment according to claim 8, characterized in that: The step of performing an integration operation on the flow difference to obtain a flow integral value at the current moment includes: determining a third product of the flow difference and a second integral coefficient; The sum of the third product and the flow integral value at the previous moment is taken as the flow integral value at the current moment; The performing a proportional operation on the flow difference to obtain a proportional product corresponding to the flow difference includes: A fourth product of the flow difference and the second proportional coefficient is determined as the proportional product corresponding to the flow difference.

10. The control method of oxygen production equipment according to claim 1, characterized in that: Also includes: Obtaining the current oxygen concentration level and the current flow level of the oxygen production equipment; Based on the current oxygen concentration gear, the compressor is controlled to operate at a preset speed corresponding to the current oxygen concentration gear, and based on the current flow gear, the flow valve is controlled to operate at a preset opening corresponding to the current flow gear; Obtaining an oxygen concentration difference between the current output oxygen concentration and a preset output oxygen concentration corresponding to the current oxygen concentration gear, and a flow difference between the current output flow and a preset output flow corresponding to the current flow gear; In response to the oxygen concentration difference being less than a first threshold and the flow rate difference being less than a second threshold within a preset time, the pre-startup of the oxygen production equipment is completed.

11. An oxygen production device, characterized in that: It includes a compressor, a flow valve and a control device, wherein the control device is connected to the compressor and the flow valve, and the control device includes: A memory for storing program instructions; A processor is used to execute the program instructions to implement the control method of the oxygen production equipment according to any one of claims 1 to 10.

12. The oxygen production equipment according to claim 11, characterized in that: The oxygen production equipment also includes a detection sensor connected to the control device, the detection sensor is used to detect the current output oxygen concentration and the current output flow rate, and the detection sensor is arranged between the flow valve and the oxygen outlet of the oxygen production equipment and close to the oxygen outlet.

13. A non-volatile computer-readable storage medium having program instructions stored thereon, characterized in that: When the program instructions are executed by a processor, the control method for the oxygen production equipment according to any one of claims 1 to 10 is implemented.

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