Oxygen production control method of oxygen generator and oxygen generator system

Abstract

The invention provides an oxygen production control method of an oxygen generator and an oxygen generator system, and relates to the technical field of oxygen generators, and the oxygen production control method comprises the following steps: obtaining the maximum pressure value of an oxygen storage barrel after stable oxygen output of the oxygen generator under the state of a preset compressor rotating speed and a preset molecular sieve maximum pressure value; judging whether the maximum pressure value of the oxygen storage barrel within a preset duration is continuously smaller than a preset pressure threshold value of the oxygen storage barrel or not; if the maximum pressure value of the oxygen storage barrel within a preset time length is continuously smaller than a preset pressure threshold value of the oxygen storage barrel, obtaining a first inflation time length when the pressure value of the molecular sieve reaches the preset maximum pressure value of the molecular sieve; whether the first inflation duration exceeds a preset inflation duration threshold value or not is judged; and if the first inflation duration does not exceed the preset inflation duration threshold, compensating operation parameters of the oxygen generator. Whether the molecular sieve needs to be subjected to aging compensation or not is automatically judged, meanwhile, the judgment accuracy of aging compensation of the molecular sieve is improved, the use cost of the oxygenerator is reduced, and the practicability of the oxygenerator is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of oxygen concentrators, and in particular to an oxygen concentrator oxygen control method and an oxygen concentrator system. Background Art

[0002] The existing oxygen generators will often have aging problems with the molecular sieve part after being used for a period of time. Due to the aging of the molecular sieve part, the air resistance in the molecular sieve barrel will increase, and the molecular sieve barrel will be unable to produce oxygen of qualified concentration, resulting in reduced performance of the whole machine, or even inability to continue to use.

[0003] When the performance of the oxygen generator drops significantly or cannot be used due to aging of the molecular sieve, the molecular sieve is often replaced directly. However, the molecular sieve is not completely ineffective, and some of it is still ineffective and can continue to be used. If the molecular sieve is replaced directly, a large amount of molecular sieve will be wasted, and the cost of using the oxygen generator will also increase.

[0004] In the prior art, in order to timely detect the aging of the molecular sieve and to promptly remedy the aging of the molecular sieve, there is a method of directly setting a pressure sensor in the molecular sieve adsorption barrel or setting an oxygen concentration sensor in the oxygen pipeline, and obtaining the pressure in the molecular sieve adsorption barrel and the oxygen concentration in the oxygen pipeline to determine whether the molecular sieve needs to be aged; however, since the gas is mostly in a flowing state when passing through the molecular sieve, its pressure is unstable, and partial aging of the molecular sieve will also cause different pressures at various positions inside the molecular sieve. Therefore, there is a problem of inaccurate pressure acquisition by the pressure sensor. Similarly, when an oxygen concentration sensor is set in the pipeline, there is also a problem of different oxygen concentrations at various positions in the pipeline, so there is also a problem of inaccurate measurement. Summary of the invention

[0005] The present application provides an oxygen generator oxygen control method and an oxygen generator system to at least solve at least one technical problem existing in the related art.

[0006] According to one aspect of an embodiment of the present application, there is provided an oxygen control method for an oxygen concentrator, comprising: obtaining a maximum pressure value of an oxygen storage tank after stable oxygen output when the oxygen concentrator is under a preset compressor speed and a preset molecular sieve maximum pressure value; determining whether the maximum pressure value of the oxygen storage tank within a preset time period is continuously less than a preset pressure threshold of the oxygen storage tank; if the maximum pressure value of the oxygen storage tank within the preset time period is continuously less than the preset pressure threshold of the oxygen storage tank, obtaining a first inflation time for the molecular sieve pressure value to reach the preset molecular sieve maximum pressure value; determining whether the first inflation time period exceeds a preset inflation time threshold; if the first inflation time period does not exceed the preset inflation time threshold, compensating for operating parameters of the oxygen concentrator.

[0007] As an optional implementation, the compensating the operating parameters of the oxygen generator includes: increasing the inflation time of the molecular sieve adsorption barrel, and / or increasing the speed of the compressor.

[0008] As an optional implementation, the inflation time of the molecular sieve adsorption barrel is increased to obtain a first inflation correction time, and it is determined whether the first inflation correction time is less than a preset inflation time threshold; if the first inflation correction time is less than the preset inflation time threshold, the first inflation correction time is used as the second inflation time after one compensation of the oxygen concentrator; if the first inflation correction time is not less than the preset inflation time threshold, the preset inflation time threshold is used as the second inflation time after one compensation of the oxygen concentrator, and the compressor speed is increased as the compressor speed after one compensation.

[0009] As an optional implementation, when the first inflation correction time is used as the second inflation time after the oxygen concentrator is compensated once: whether the maximum pressure value of the oxygen storage tank reaches the preset pressure threshold of the oxygen storage tank; if the maximum pressure value of the oxygen storage tank after the oxygen concentrator is compensated once reaches the preset pressure threshold of the oxygen storage tank, whether the oxygen concentration of the oxygen storage tank reaches the first oxygen concentration preset value is determined.

[0010] As an optional implementation, when the first inflation correction time is used as the second inflation time of the oxygen concentrator after one compensation, if the oxygen concentration of the oxygen storage tank reaches the first oxygen concentration preset value, the oxygen concentrator operates with the parameters after one compensation; if the oxygen concentration of the oxygen storage tank does not reach the first oxygen concentration preset value, it is determined whether the oxygen concentration of the oxygen storage tank after one compensation is higher than the oxygen concentration of the oxygen storage tank before compensation.

[0011] As an optional implementation, after determining whether the oxygen concentration in the oxygen storage tank after a compensation is higher than the oxygen concentration in the oxygen storage tank before compensation, it also includes: if the oxygen concentration in the oxygen storage tank after the compensation is higher than the oxygen concentration in the oxygen storage tank before compensation, then using the second inflation time as the inflation time for the next pressurization of the molecular sieve adsorption tank; if the oxygen concentration in the oxygen storage tank after the compensation is not higher than the oxygen concentration in the oxygen storage tank before compensation, then using the first inflation time as the inflation time for the next pressurization of the molecular sieve adsorption tank.

[0012] As an optional embodiment, when the oxygen concentration of the oxygen storage tank does not reach the first oxygen concentration preset value, it also includes: judging whether the oxygen concentration of the oxygen storage tank is lower than the second oxygen concentration preset value; if the oxygen concentration of the oxygen storage tank is lower than the second oxygen concentration preset value, outputting a signal indicating that the molecular sieve needs to be replaced; wherein the first oxygen concentration preset value is greater than the second oxygen concentration preset value.

[0013] As an optional implementation, when the preset inflation time threshold is used as the second inflation time after a compensation, after increasing the compressor speed as the compressor speed after a compensation, it is determined whether the maximum pressure value of the oxygen storage tank is greater than the preset pressure threshold of the oxygen storage tank; if the maximum pressure value of the oxygen storage tank is greater than the preset pressure threshold of the oxygen storage tank, a secondary compensation is performed to reduce the inflation time of the molecular sieve adsorption tank, obtain a second inflation correction time, and use the second inflation correction time as the inflation time for the next pressurization work of the molecular sieve adsorption tank.

[0014] As an optional implementation, if the maximum pressure value of the oxygen storage tank is less than the preset pressure threshold of the oxygen storage tank, determine whether the compressor speed has reached the preset maximum effective speed; if the compressor speed has not reached the preset maximum effective speed, continue to increase the compressor speed until the maximum pressure value of the oxygen storage tank is not less than the preset pressure threshold of the oxygen storage tank, and / or the compressor speed reaches the preset maximum effective speed.

[0015] As an optional implementation, if the compressor speed reaches the preset maximum effective speed, it is determined whether the current oxygen tank oxygen concentration is greater than the oxygen tank oxygen concentration before compensation. If the current oxygen tank oxygen concentration is greater than the oxygen tank oxygen concentration before compensation, the compressor of the oxygen concentrator is controlled to continue running at the preset maximum effective speed; if the current oxygen tank oxygen concentration is not greater than the oxygen tank oxygen concentration before compensation, the compressor of the oxygen concentrator is controlled to run at the compressor speed before compensation.

[0016] As an optional implementation, after determining whether the current oxygen concentration in the oxygen storage tank is greater than the oxygen concentration in the oxygen storage tank before compensation, determine whether the oxygen concentration in the oxygen storage tank is lower than a second preset value of oxygen concentration; if the oxygen concentration in the oxygen storage tank is lower than the second preset value of oxygen concentration, output a signal indicating that the molecular sieve needs to be replaced; if the oxygen concentration in the oxygen storage tank is not lower than the second preset value of oxygen concentration, the oxygen generator continues to operate with current parameters until the oxygen concentration in the oxygen storage tank is lower than the second preset value of oxygen concentration.

[0017] As an optional implementation, if the maximum pressure value of the oxygen storage tank is greater than the preset pressure threshold of the oxygen storage tank, secondary compensation is performed to reduce the inflation time of the molecular sieve adsorption tank until the maximum pressure value of the oxygen storage tank is no greater than the preset pressure threshold of the oxygen storage tank. The inflation time before the last reduction in the inflation time is used as the inflation time for the next pressurization work of the molecular sieve adsorption cylinder.

[0018] As an optional implementation, it is determined whether the oxygen concentration in the oxygen storage tank is greater than the first oxygen concentration preset value when the inflation time before the last reduction in inflation time is used as the inflation time for the next pressurization operation of the molecular sieve adsorption cylinder. If the oxygen concentration in the oxygen storage tank is greater than the first oxygen concentration preset value, the oxygen generator continues to operate with the inflation time before the last reduction in inflation time as the operating parameter.

[0019] As an optional implementation, if the oxygen concentration in the oxygen storage tank is not greater than the first oxygen concentration preset value, it is determined whether the oxygen concentration in the oxygen storage tank after increasing the compressor speed is greater than the oxygen concentration before compensation; if the oxygen concentration in the oxygen storage tank after increasing the compressor speed is greater than the oxygen concentration before compensation, the compressor of the oxygen concentrator runs at the compressor speed after the compressor speed is increased; if the oxygen concentration in the oxygen storage tank after increasing the compressor speed is not greater than the oxygen concentration before compensation, the compressor of the oxygen concentrator runs at the compressor speed before compensation.

[0020] As an optional implementation, after determining whether the oxygen concentration after increasing the compressor speed is greater than the oxygen concentration before compensation, determine whether the oxygen concentration in the oxygen storage tank is lower than the second oxygen concentration preset value; if the oxygen concentration in the oxygen storage tank is lower than the second oxygen concentration preset value, output a signal indicating that the molecular sieve needs to be replaced; if the oxygen concentration in the oxygen storage tank is not lower than the second oxygen concentration preset value, the oxygen generator continues to operate with current parameters until the oxygen concentration in the oxygen storage tank is lower than the second oxygen concentration preset value.

[0021] As an optional implementation, if the maximum pressure value of the oxygen storage tank after the first compensation does not reach the preset pressure threshold of the oxygen storage tank, the inflation time of the molecular sieve adsorption tank continues to increase until the maximum pressure value of the oxygen storage tank is not less than the preset pressure threshold of the oxygen storage tank, and / or the inflation time of the molecular sieve adsorption tank is not less than the preset inflation time threshold.

[0022] As an optional implementation, if the inflation time of the molecular sieve adsorption barrel is not less than the preset inflation time threshold, it is determined that the compressor is faulty.

[0023] According to one aspect of an embodiment of the present application, an oxygen generator system is also provided, comprising two molecular sieve adsorption barrels arranged in parallel, and switching valves respectively connected to the air inlet ends of the two molecular sieve adsorption barrels when inflated, and oxygen storage barrels respectively connected to the air outlet ends of the two molecular sieve adsorption barrels when inflated; further comprising: an oxygen storage barrel pressure detection module, connected to the oxygen storage barrel, for continuously monitoring the pressure value of the oxygen storage barrel; a molecular sieve adsorption barrel pressure detection module, arranged between a plurality of the molecular sieve adsorption barrels and the switching valve, for obtaining the air inlet end pressure values ​​of the plurality of the molecular sieve adsorption barrels when inflated.

[0024] Specifically, the oxygen production capacity of the oxygen concentrator is judged by the size relationship between the maximum pressure value of the oxygen storage tank within the preset time and the preset pressure threshold of the oxygen storage tank after the oxygen concentrator stably produces oxygen under the preset compressor speed and the preset maximum molecular sieve pressure value. If the maximum pressure value of the oxygen storage tank within the preset time is continuously less than the preset pressure threshold of the oxygen storage tank, it indicates that the oxygen production capacity of the current oxygen concentrator does not meet the requirement. Then, the first inflation time for the molecular sieve pressure value to reach the preset maximum molecular sieve pressure value is obtained, and the size relationship between the first inflation time and the preset inflation time threshold is compared. If the first inflation time does not exceed the preset inflation time threshold, it means that the oxygen production capacity of the oxygen concentrator decreases under normal inflation and cannot meet the requirement, that is, the maximum pressure value of the oxygen storage tank does not reach the preset pressure threshold. Then it can be considered that the molecular sieve is aging and has reached the degree that compensation is required. Therefore, the operating parameters of the oxygen concentrator are compensated at this time. The above method steps can accurately determine whether the molecular sieve of the oxygen concentrator is aging and can preset an oxygen storage tank pressure threshold. By controlling the pressure threshold, the aging degree of the molecular sieve can be controlled when the molecular sieve is aging compensated. The pressure of the oxygen storage tank is also stable after stabilization, and there is no inaccuracy in obtaining the inflation time. While realizing automatic judgment on whether the molecular sieve needs aging compensation, the accuracy of the judgment on the molecular sieve aging compensation is greatly improved, the use cost of the oxygen concentrator is reduced, and the practicality of the oxygen concentrator is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0027] Figure 1 It is a flow chart of an optional oxygen control method of an oxygen generator provided according to an embodiment of the present application.

[0028] Figure 2 It is a flow chart of another optional oxygen control method of an oxygen generator provided according to an embodiment of the present application.

[0029] Figure 3 It is a schematic diagram of a modular structure of an optional oxygen concentrator system provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0031] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0032] like Figure 1-2 As shown, in order to solve the above technical problems, the embodiment of the present application provides an oxygen control method of an oxygen generator, comprising:

[0033] S1 obtains the maximum pressure value of the oxygen storage tank after the oxygen generator outputs oxygen stably under the preset compressor speed and the preset molecular sieve maximum pressure value;

[0034] S2 determines whether the maximum pressure value of the oxygen storage tank within a preset time period is continuously less than a preset pressure threshold value of the oxygen storage tank;

[0035] S3: if the maximum pressure value of the oxygen storage tank within the preset time is continuously less than the preset pressure threshold value of the oxygen storage tank, obtaining the first inflation time when the molecular sieve pressure value reaches the preset maximum pressure value of the molecular sieve;

[0036] S4 determines whether the first inflation time exceeds a preset inflation time threshold;

[0037] S5: If the first inflation time does not exceed the preset inflation time threshold, the operating parameters of the oxygen concentrator are compensated.

[0038] The oxygen production capacity of the oxygen concentrator is determined by the relationship between the maximum pressure value of the oxygen storage tank within a preset time and the preset pressure threshold of the oxygen storage tank after the oxygen concentrator stably produces oxygen under the preset compressor speed and the preset maximum molecular sieve pressure value. If the maximum pressure value of the oxygen storage tank within the preset time is continuously less than the preset pressure threshold of the oxygen storage tank, it indicates that the oxygen production capacity of the current oxygen concentrator does not meet the requirement. Then, the first inflation time for the molecular sieve pressure value to reach the preset maximum molecular sieve pressure value is obtained, and the relationship between the first inflation time and the preset inflation time threshold is compared. If the first inflation time does not exceed the preset inflation time threshold, it indicates that the oxygen production capacity of the oxygen concentrator decreases under normal inflation and cannot meet the requirement, that is, the maximum pressure value of the oxygen storage tank does not reach the preset pressure threshold. Then it can be considered that the molecular sieve is aging and has reached a level that requires compensation. Therefore, the operating parameters of the oxygen concentrator are compensated at this time. The above method steps can accurately determine whether the molecular sieve of the oxygen concentrator is aging and can preset an oxygen storage tank pressure threshold. By controlling the pressure threshold, the aging degree of the molecular sieve can be controlled when the molecular sieve is aging compensated. The pressure of the oxygen storage tank is also stable after stabilization, and there is no inaccuracy in the acquisition of the inflation time. While realizing automatic judgment on whether the molecular sieve needs aging compensation, the accuracy of the judgment on the aging compensation of the molecular sieve is greatly improved, the use cost of the oxygen concentrator is reduced, and the practicality of the oxygen concentrator is improved.

[0039] It should be noted that the present application does not limit the setting of the preset pressure threshold of the oxygen storage tank and the preset inflation time threshold. The preset inflation time threshold can be used to determine whether the oxygen concentrator is operating normally, that is, if the inflation time of the molecular sieve exceeds the preset inflation time threshold, it can be indicated that the oxygen concentrator has an operating abnormality other than molecular sieve aging, such as compressor failure; if the inflation time of the molecular sieve does not exceed the preset inflation time threshold, it can be indicated that the oxygen concentrator is operating normally except for the possible molecular sieve aging problem, and the preset pressure threshold of the oxygen storage tank can be used to determine whether the molecular sieve needs to be compensated for aging, so its setting can determine the aging state of the molecular sieve when compensation is performed, and the specific value of the preset pressure threshold of the oxygen storage tank can be set higher, so that the molecular sieve aging compensation is performed when the pressure value of the oxygen storage tank is at a higher level but less than the threshold, so that once the molecular sieve is aged or the aging degree is low, the aging compensation is performed, and the aging compensation frequency will be higher; the specific value of the preset pressure threshold of the oxygen storage tank can also be set lower, so that the molecular sieve aging compensation is performed only when the pressure value of the oxygen storage tank is already relatively low, and the aging frequency is low, which can be determined specifically according to the use requirements of the oxygen concentrator.

[0040] Exemplarily, if the inflation time of the molecular sieve adsorption barrel is not less than the preset inflation time threshold, it is determined that the compressor is faulty.

[0041] At the same time, as an optional implementation, when it is determined that the molecular sieve is aged and needs to be compensated, the method of increasing the inflation time of the molecular sieve adsorption barrel, or increasing the speed of the compressor, or increasing the inflation time of the molecular sieve adsorption barrel and increasing the speed of the compressor can be adopted. This application does not limit the specific compensation method selected. The following content will expand and explain the specific aging compensation method by way of example.

[0042] Further exemplary, whether to increase the inflation time of the molecular sieve adsorption barrel or to increase the inflation time of the molecular sieve adsorption barrel and increase the speed of the compressor can be determined by the following more specific steps:

[0043] S501 increases the inflation time of the molecular sieve adsorption barrel to obtain a first inflation correction time;

[0044] S502: determining whether the first inflation correction time is less than a preset inflation time threshold;

[0045] S503: if the first inflation correction time is less than the preset inflation time threshold, the first inflation correction time is used as the second inflation time after one compensation of the oxygen concentrator;

[0046] S504: If the first inflation correction time is not less than the preset inflation time threshold, the preset inflation time threshold is used as the second inflation time of the oxygen concentrator after one compensation, and the compressor speed is increased.

[0047] Among them, the present application does not limit the specific inflation time added in step S501, which can be a fixed value. The fixed value can be set in advance according to the preset pressure threshold of the oxygen storage tank or the preset inflation time threshold and other values, or it can be selected in real time according to the actual current inflation time or the current maximum pressure value of the oxygen storage tank.

[0048] First, increase the inflation time of the molecular sieve adsorption barrel, increase the oxygen production pressure of the molecular sieve that has not yet aged in the molecular sieve barrel, and try to make the molecular sieve barrel produce oxygen of qualified concentration. However, the first inflation correction time after increasing the inflation time still cannot exceed the preset inflation time threshold. Therefore, if the first inflation correction time is less than the preset inflation time threshold, the first inflation correction time is used as the second inflation time after the oxygen concentrator is compensated once. If the first inflation correction time is not less than the preset inflation time threshold, the preset inflation time threshold is used as the second inflation time after the oxygen concentrator is compensated once, and the compressor speed is increased as the compressor speed after the compensation. The above implementation method can enable the oxygen concentrator to achieve automatic aging compensation through further aging compensation, thereby further improving the practicality of the oxygen concentrator.

[0049] For the above steps S501-S504, there may be multiple different implementations as follows, which are described below in the form of examples.

[0050] Embodiment 1:

[0051] When the first inflation correction time is used as the second inflation time after the oxygen concentrator is compensated once: determine whether the maximum pressure value of the oxygen storage tank reaches the preset pressure threshold of the oxygen storage tank; if the maximum pressure value of the oxygen storage tank after the oxygen concentrator is compensated once reaches the preset pressure threshold of the oxygen storage tank, determine whether the oxygen concentration of the oxygen storage tank reaches the first oxygen concentration preset value.

[0052] Specifically, since the oxygen concentration inside the oxygen storage tank is difficult to measure, the "oxygen concentration in the oxygen storage tank" in this embodiment refers to the oxygen concentration output by the oxygen storage tank.

[0053] That is, after increasing the inflation time, the oxygen production capacity of the oxygen concentrator is judged by judging whether the maximum pressure value of the oxygen storage tank reaches the preset pressure threshold of the oxygen storage tank. If the maximum pressure value of the oxygen storage tank after one compensation reaches the preset pressure threshold of the oxygen storage tank, it can be basically considered that the oxygen production capacity of the oxygen concentrator meets the requirements. However, there may still be other faults at this time, or even if the maximum pressure value of the oxygen storage tank reaches the preset pressure threshold of the oxygen storage tank, the oxygen production capacity of the oxygen concentrator still does not meet the requirements, for example, the oxygen concentration is too low, then the oxygen concentration of the oxygen storage tank can be judged at this time. The compensation effect of the molecular sieve aging problem is improved, and the practicality of the oxygen concentrator is improved.

[0054] In addition, if the maximum pressure value of the oxygen storage tank after the first compensation does not reach the preset pressure threshold of the oxygen storage tank, the inflation time of the molecular sieve adsorption tank will continue to increase until the maximum pressure value of the oxygen storage tank is not less than the preset pressure threshold of the oxygen storage tank, and / or the inflation time of the molecular sieve adsorption tank is not less than the preset inflation time threshold.

[0055] Furthermore, when the first inflation correction time is used as the second inflation time after the oxygen concentrator is compensated once, if the oxygen concentration of the oxygen storage tank reaches the first oxygen concentration preset value, the oxygen concentrator operates with the parameters after the first compensation; if the oxygen concentration of the oxygen storage tank does not reach the first oxygen concentration preset value, it is determined whether the oxygen concentration of the oxygen storage tank after the first compensation is higher than the oxygen concentration of the oxygen storage tank before compensation.

[0056] Specifically, when the first inflation correction time is used as the second inflation time after the oxygen concentrator is compensated once, if the maximum pressure value of the oxygen storage tank reaches the preset pressure threshold of the oxygen storage tank and the oxygen concentration of the oxygen storage tank reaches the first oxygen concentration preset value, then it can be considered that the compensated molecular sieve can produce oxygen of qualified concentration, then the oxygen concentrator is controlled to operate with the parameters after the first compensation, and the expected oxygen production effect can be achieved. The effect of aging compensation can be further improved while ensuring the normal operation of the oxygen concentrator. The setting of the first oxygen concentration preset value can be used to judge whether the oxygen production capacity of the molecular sieve meets the requirements from the aspect of oxygen concentration, that is, if the oxygen concentration is lower than the first oxygen concentration preset value, it is considered that the oxygen production capacity of the molecular sieve does not meet expectations. Therefore, the setting of the first oxygen concentration preset value can be determined according to the use scenario, use intensity and selection of the oxygen concentrator itself, for example, it can be 88%.

[0057] However, if the oxygen concentration in the oxygen storage tank does not reach the first oxygen concentration preset value, it means that the molecular sieve still cannot achieve the expected oxygen production effect after one compensation. At this time, it can be determined whether the oxygen concentration in the oxygen storage tank after one compensation is higher than the oxygen concentration in the oxygen storage tank before compensation.

[0058] Furthermore, after determining whether the oxygen concentration of the oxygen storage tank after the first compensation is higher than the oxygen concentration of the oxygen storage tank before the compensation, it also includes: if the oxygen concentration of the oxygen storage tank after the first compensation is higher than the oxygen concentration of the oxygen storage tank before the compensation, the second gas filling time is used as the gas filling time of the next pressurization of the molecular sieve adsorption tank; if the oxygen concentration of the oxygen storage tank after the first compensation is not higher than the oxygen concentration of the oxygen storage tank before the compensation, the first gas filling time is used as the gas filling time of the next pressurization of the molecular sieve adsorption tank. That is, when the oxygen generator is difficult to achieve the expected oxygen production effect after aging compensation, it is operated with parameters with better oxygen production effect.

[0059] In addition, when the oxygen concentration in the oxygen storage tank does not reach the first oxygen concentration preset value, it means that the molecular sieve still cannot achieve the expected oxygen production effect after one compensation, which may also mean that the molecular sieve can no longer be used. At this time, it is also possible to: determine whether the oxygen concentration in the oxygen storage tank is lower than the second oxygen concentration preset value; if the oxygen concentration in the oxygen storage tank is lower than the second oxygen concentration preset value, output a signal indicating that the molecular sieve needs to be replaced; wherein the first oxygen concentration preset value is greater than the second oxygen concentration preset value.

[0060] The setting of the second oxygen concentration preset value can be used to determine whether the molecular sieve can continue to be used, that is, if the oxygen concentration is lower than the second oxygen concentration preset value, it is considered that the molecular sieve cannot be used any more. Therefore, the setting of the second oxygen concentration preset value can be determined according to the use scenario, usage intensity and selection of the oxygen concentrator itself, for example, it can be 82%.

[0061] Embodiment 2:

[0062] When the preset inflation time threshold is used as the second inflation time after the first compensation, after increasing the compressor speed as the compressor speed after the first compensation, it is determined whether the maximum pressure value of the oxygen storage tank is greater than the preset pressure threshold of the oxygen storage tank. If the maximum pressure value of the oxygen storage tank is greater than the preset pressure threshold of the oxygen storage tank, a second compensation is performed to reduce the inflation time of the molecular sieve adsorption tank, obtain a second inflation correction time, and use the second inflation correction time as the inflation time for the next pressurization work of the molecular sieve adsorption tank.

[0063] That is, after increasing the inflation time and increasing the compressor speed, the oxygen production capacity of the oxygen concentrator is judged by judging whether the maximum pressure value of the oxygen storage tank reaches the preset pressure threshold of the oxygen storage tank. If the maximum pressure value of the oxygen storage tank after one compensation reaches the preset pressure threshold of the oxygen storage tank, then it can be basically considered that the oxygen production capacity of the oxygen concentrator meets the requirements. However, if the maximum pressure value of the oxygen storage tank after one compensation is greater than the preset pressure threshold of the oxygen storage tank, it can be considered that the oxygen production capacity of the oxygen concentrator exceeds expectations at this time. If it runs with the current operating parameters, there will be a problem of wasting oxygen production and shortening the service life of the oxygen concentrator. Therefore, a secondary compensation can be performed at this time to reduce the inflation time of the molecular sieve adsorption tank, obtain a second inflation correction time, and use the second inflation correction time as the inflation time of the molecular sieve adsorption tank, wherein the value of the specific inflation time reduced by this application is not limited, and it can preferably be set to a smaller inflation time than the one-time compensation. On the basis of ensuring the oxygen production effect of the oxygen concentrator, the service life of the oxygen concentrator and the service life of the molecular sieve can be further extended.

[0064] Furthermore, if the maximum pressure value of the oxygen storage tank is less than the preset pressure threshold of the oxygen storage tank, determine whether the compressor speed has reached the preset maximum effective speed; if the compressor speed has not reached the preset maximum effective speed, continue to increase the compressor speed until the maximum pressure value of the oxygen storage tank is not less than the preset pressure threshold of the oxygen storage tank, and / or the compressor speed reaches the preset maximum effective speed.

[0065] When the maximum pressure value of the oxygen storage tank is less than the preset pressure threshold of the oxygen storage tank, further increasing the speed of the compressor can further compensate for the molecular sieve that fails to achieve the expected oxygen production effect, thereby improving the compensation effect of the molecular sieve, thereby increasing the service life of the molecular sieve and reducing the cost of use.

[0066] Furthermore, if the compressor speed reaches the preset maximum effective speed, it is determined whether the current oxygen concentration in the oxygen storage tank is greater than the oxygen concentration in the oxygen storage tank before compensation. If the current oxygen concentration in the oxygen storage tank is greater than the oxygen concentration in the oxygen storage tank before compensation, the compressor of the oxygen concentrator is controlled to continue running at the preset maximum effective speed; if the current oxygen concentration in the oxygen storage tank is not greater than the oxygen concentration in the oxygen storage tank before compensation, the compressor of the oxygen concentrator is controlled to run at the compressor speed before compensation.

[0067] Specifically, since the oxygen concentration inside the oxygen storage tank is difficult to measure, the "oxygen concentration in the oxygen storage tank" in this embodiment refers to the oxygen concentration output by the oxygen storage tank.

[0068] It can be understood that, at this time, the inflation time of the molecular sieve adsorption cylinder of the oxygen generator is the preset inflation time threshold.

[0069] Specifically, the operating parameters for achieving a better molecular sieve oxygen production effect can be determined by judging whether the oxygen concentration in the oxygen storage tank after a compensation is higher than the oxygen concentration in the oxygen storage tank before compensation.

[0070] Furthermore, after determining whether the current oxygen concentration in the oxygen storage tank is greater than the oxygen concentration in the oxygen storage tank before compensation, determine whether the oxygen concentration in the oxygen storage tank is lower than a second preset value of oxygen concentration; if the oxygen concentration in the oxygen storage tank is lower than the second preset value of oxygen concentration, output a signal indicating that the molecular sieve needs to be replaced; if the oxygen concentration in the oxygen storage tank is not lower than the second preset value of oxygen concentration, the oxygen concentrator continues to operate with current parameters until the oxygen concentration in the oxygen storage tank is lower than the second preset value of oxygen concentration.

[0071] The setting of the second oxygen concentration preset value can be used to determine whether the molecular sieve can continue to be used, that is, if the oxygen concentration is lower than the second oxygen concentration preset value, it is considered that the molecular sieve cannot be used any more. Therefore, the setting of the second oxygen concentration can be determined according to the use scenario and usage intensity of the oxygen concentrator and the selection of the oxygen concentrator itself.

[0072] In addition, it is also possible to determine whether the oxygen concentration in the oxygen storage tank can reach the first oxygen concentration preset value. When the oxygen concentration in the oxygen storage tank does not reach the first oxygen concentration preset value but reaches the second oxygen concentration, it means that although the molecular sieve has not achieved the expected oxygen production effect, it can still be used. Therefore, the oxygen concentration in the oxygen storage tank is not lower than the second oxygen concentration preset value, and the oxygen concentrator continues to operate with current parameters until the oxygen concentration in the oxygen storage tank is lower than the second oxygen concentration preset value.

[0073] Embodiment three:

[0074] When the preset inflation time threshold is used as the second inflation time after the first compensation, after increasing the compressor speed, if the maximum pressure value of the oxygen storage tank is greater than the preset pressure threshold of the oxygen storage tank, a second compensation is performed to reduce the inflation time of the molecular sieve adsorption tank. If the inflation time continues to be reduced and the maximum pressure value of the oxygen storage tank is not greater than the preset pressure threshold of the oxygen storage tank, the inflation time will no longer continue to be reduced (this is recorded as the last time the inflation time was reduced), and the inflation time before the last reduction in the inflation time (i.e., the inflation time after the penultimate reduction in the inflation time) is used as the inflation time for the next pressurization work of the molecular sieve adsorption cylinder.

[0075] This setting can further improve the compensation effect of molecular sieve aging compensation.

[0076] Further, it is determined whether the oxygen concentration in the oxygen storage tank is greater than the first preset value of oxygen concentration when the inflation time before the last reduction in inflation time is used as the inflation time for the next pressurization operation of the molecular sieve adsorption cylinder. If the oxygen concentration in the oxygen storage tank is greater than the first preset value of oxygen concentration, the inflation time before the last reduction in inflation time is used as the operating parameter of the oxygen generator to continue operating.

[0077] Specifically, since the oxygen concentration inside the oxygen storage tank is difficult to measure, the "oxygen concentration in the oxygen storage tank" in this embodiment refers to the oxygen concentration output by the oxygen storage tank.

[0078] Furthermore, if the oxygen concentration in the oxygen storage tank is not greater than the first oxygen concentration preset value, it is determined whether the oxygen concentration in the oxygen storage tank after increasing the compressor speed is greater than the oxygen concentration before compensation; if the oxygen concentration in the oxygen storage tank after increasing the compressor speed is greater than the oxygen concentration before compensation, the compressor of the oxygen concentrator runs at the compressor speed after compensation; if the oxygen concentration in the oxygen storage tank after increasing the compressor speed is not greater than the oxygen concentration before compensation, the compressor of the oxygen concentrator runs at the compressor speed before compensation.

[0079] It can be understood that, at this time, the inflation time of the molecular sieve adsorption cylinder of the oxygen generator is the preset inflation time threshold.

[0080] Further, after determining whether the oxygen concentration after increasing the compressor speed is greater than the oxygen concentration before compensation, determine whether the oxygen concentration in the oxygen storage tank is lower than the second oxygen concentration preset value; if the oxygen concentration in the oxygen storage tank is lower than the second oxygen concentration preset value, output a signal indicating that the molecular sieve needs to be replaced; if the oxygen concentration in the oxygen storage tank is not lower than the second oxygen concentration preset value, the oxygen generator continues to operate with current parameters until the oxygen concentration in the oxygen storage tank is lower than the second oxygen concentration preset value.

[0081] In addition, as a more specific implementation, the control of the oxygen generator can be implemented according to the above-mentioned embodiments 1 to 3 respectively, or the above-mentioned embodiments 1 to 3 can be combined to implement, that is, Figure 2 As shown, this application does not limit this. Figure 2 Any multiple steps in the above steps can be disassembled or combined to solve the technical problem of inaccurate judgment of molecular sieve aging to be solved by the present application. The oxygen generator control method is also within the protection scope of the present application.

[0082] According to one aspect of an embodiment of the present application, an oxygen generator system is also provided, comprising two molecular sieve adsorption barrels arranged in parallel, and switching valves respectively connected to the air inlet ends of the two molecular sieve adsorption barrels when inflated, and oxygen storage barrels respectively connected to the air outlet ends of the two molecular sieve adsorption barrels when inflated; further comprising: an oxygen storage barrel pressure detection module, connected to the oxygen storage barrel, for continuously monitoring the pressure value of the oxygen storage barrel; a molecular sieve adsorption barrel pressure detection module, arranged between a plurality of the molecular sieve adsorption barrels and the switching valve, for obtaining the air inlet end pressure values ​​of the plurality of the molecular sieve adsorption barrels when inflated.

[0083] like Figure 3 As shown, three pressure monitoring points are added to the oxygen concentrator gas circuit system. Pressure monitoring 1 and pressure monitoring 2 are located between the molecular sieve adsorption barrel A, B and the switching valve, i.e., the molecular sieve adsorption barrel pressure detection module. Pressure monitoring 3 is the oxygen storage barrel pressure detection module, which detects the air pressure value in the oxygen storage barrel. During the normal operation of the oxygen concentrator, when the maximum pressure value at pressure monitoring 1 and 2 reaches the system setting value, the switching valve works to realize the switching of the molecular sieve barrel's air intake and exhaust.

[0084] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0085] If the integrated units in the above embodiments are implemented in the form of software functional units and sold or used as independent products, they can be stored in the above computer-readable storage medium. Based on this understanding, the technical solution of the present application, 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, which is stored in a storage medium and includes several instructions for enabling one or more electronic devices (such as personal computers, servers, or network devices) to perform all or part of the steps of the methods described in the various embodiments of the present application.

[0086] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0087] In the several embodiments provided in the present application, it should be understood that the disclosed client can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple 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 mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0088] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution provided in this embodiment.

[0089] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0090] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0091] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. An oxygen generator oxygen control method, characterized in that: include: Obtain the maximum pressure value of the oxygen storage tank after the oxygen generator outputs oxygen stably under the preset compressor speed and the preset molecular sieve maximum pressure value; Determine whether the maximum pressure value of the oxygen storage tank within a preset time period is continuously less than a preset pressure threshold value of the oxygen storage tank; If the maximum pressure value of the oxygen storage tank within the preset time period is continuously less than the preset pressure threshold value of the oxygen storage tank, obtaining the first inflation time period when the molecular sieve pressure value reaches the preset maximum pressure value of the molecular sieve; Determining whether the first inflation time exceeds a preset inflation time threshold; If the first inflation time does not exceed the preset inflation time threshold, the operating parameters of the oxygen concentrator are compensated.

2. The oxygen generator oxygen control method according to claim 1, characterized in that: The compensating the operating parameters of the oxygen concentrator includes: Increase the inflation time of the molecular sieve adsorption barrel and / or increase the compressor speed.

3. The oxygen generator oxygen control method according to claim 2, characterized in that: Increasing the inflation time of the molecular sieve adsorption barrel to obtain a first inflation correction time, and determining whether the first inflation correction time is less than a preset inflation time threshold; If the first inflation correction time is less than the preset inflation time threshold, the first inflation correction time is used as the second inflation time after one compensation of the oxygen concentrator; If the first inflation correction time is not less than the preset inflation time threshold, the preset inflation time threshold is used as the second inflation time of the oxygen concentrator after one compensation, and the compressor speed is increased as the compressor speed after one compensation.

4. The oxygen generator oxygen control method according to claim 3, characterized in that: When the first inflation correction time is used as the second inflation time after the oxygen concentrator is compensated once: Determine whether the maximum pressure value of the oxygen storage tank reaches the preset pressure threshold of the oxygen storage tank; If the maximum pressure value of the oxygen storage tank after one compensation of the oxygen concentrator reaches the preset pressure threshold of the oxygen storage tank, it is determined whether the oxygen concentration of the oxygen storage tank reaches the first preset oxygen concentration value.

5. The oxygen generator oxygen control method according to claim 4, characterized in that: When the first inflation correction time is used as the second inflation time after the oxygen concentrator is compensated once, if the oxygen concentration of the oxygen storage tank reaches the first oxygen concentration preset value, the oxygen concentrator operates with the parameters after the compensation once; If the oxygen concentration of the oxygen storage tank does not reach the first preset oxygen concentration value, it is determined whether the oxygen concentration of the oxygen storage tank after the compensation is higher than the oxygen concentration of the oxygen storage tank before the compensation.

6. The oxygen generator oxygen control method according to claim 5, characterized in that: After determining whether the oxygen concentration of the oxygen storage tank after the compensation is higher than the oxygen concentration of the oxygen storage tank before the compensation, the method further includes: If the oxygen concentration of the oxygen storage tank after the compensation is higher than the oxygen concentration of the oxygen storage tank before the compensation, the second inflation time is used as the inflation time of the molecular sieve adsorption tank for the next pressurization operation; If the oxygen concentration of the oxygen storage tank after the first compensation is not higher than the oxygen concentration of the oxygen storage tank before the compensation, the first inflation time is used as the inflation time of the molecular sieve adsorption tank for the next pressurization operation.

7. The oxygen generator oxygen control method according to claim 4, characterized in that: When the oxygen concentration of the oxygen storage tank does not reach the first preset oxygen concentration value, the method further includes: determining whether the oxygen concentration of the oxygen storage tank is lower than a second preset oxygen concentration value; If the oxygen concentration of the oxygen storage tank is lower than the second oxygen concentration preset value, output a signal indicating that the molecular sieve needs to be replaced; Wherein, the first preset value of oxygen concentration is greater than the second preset value of oxygen concentration.

8. The oxygen generator oxygen control method according to claim 3, characterized in that: When the preset inflation time threshold is used as the second inflation time after one compensation, after increasing the compressor speed as the compressor speed after one compensation, it is determined whether the maximum pressure value of the oxygen storage tank is greater than the preset pressure threshold of the oxygen storage tank. If the maximum pressure value of the oxygen storage tank is greater than the preset pressure threshold of the oxygen storage tank, secondary compensation is performed to reduce the inflation time of the molecular sieve adsorption tank, obtain a second inflation correction time, and use the second inflation correction time as the inflation time for the next pressurization work of the molecular sieve adsorption tank.

9. The oxygen generator oxygen control method according to claim 8, characterized in that: If the maximum pressure value of the oxygen storage tank is less than the preset pressure threshold of the oxygen storage tank, determining whether the speed of the compressor reaches the preset maximum effective speed; If the compressor speed has not reached the preset maximum effective speed, continue to increase the compressor speed until the maximum pressure value of the oxygen storage tank is not less than the preset pressure threshold of the oxygen storage tank, and / or the compressor speed reaches the preset maximum effective speed.

10. The oxygen generator oxygen control method according to claim 9, characterized in that: If the compressor speed reaches the preset maximum effective speed, it is determined whether the current oxygen concentration in the oxygen storage tank is greater than the oxygen concentration in the oxygen storage tank before compensation. If the current oxygen concentration in the oxygen storage tank is greater than the oxygen concentration in the oxygen storage tank before compensation, controlling the compressor of the oxygen concentrator to continue running at the preset maximum effective speed; If the current oxygen concentration in the oxygen storage tank is not greater than the oxygen concentration in the oxygen storage tank before compensation, the compressor of the oxygen generator is controlled to run at the compressor speed before compensation.

11. The oxygen generator oxygen control method according to claim 10, characterized in that: After determining whether the current oxygen concentration of the oxygen storage tank is greater than the oxygen concentration of the oxygen storage tank before compensation, determining whether the oxygen concentration of the oxygen storage tank is lower than a second preset oxygen concentration value; If the oxygen concentration of the oxygen storage tank is lower than the second oxygen concentration preset value, output a signal indicating that the molecular sieve needs to be replaced; If the oxygen concentration in the oxygen storage tank is not lower than the second preset oxygen concentration value, the oxygen concentrator continues to operate with current parameters until the oxygen concentration in the oxygen storage tank is lower than the second preset oxygen concentration value.

12. The oxygen generator oxygen control method according to claim 8, characterized in that: If the maximum pressure value of the oxygen storage tank is greater than the preset pressure threshold of the oxygen storage tank, secondary compensation is performed to reduce the inflation time of the molecular sieve adsorption tank until the maximum pressure value of the oxygen storage tank is no greater than the preset pressure threshold of the oxygen storage tank. The inflation time before the last reduction of the inflation time is used as the second correction time and as the inflation time for the next pressurization work of the molecular sieve adsorption cylinder.

13. The oxygen generator oxygen control method according to claim 12, characterized in that: Determine whether the oxygen concentration in the oxygen storage tank is greater than the first preset oxygen concentration value when the inflation time before the last reduction in inflation time is used as the inflation time for the next pressurization operation of the molecular sieve adsorption cylinder. If the oxygen concentration in the oxygen storage tank is greater than the first preset oxygen concentration value, the inflation time before the last reduction in inflation time is used as the operating parameter of the oxygen generator to continue operating.

14. The oxygen generator oxygen control method according to claim 13, characterized in that: If the oxygen concentration in the oxygen storage tank is not greater than the first preset oxygen concentration value, it is determined whether the oxygen concentration in the oxygen storage tank after increasing the compressor speed is greater than the oxygen concentration before compensation. If the oxygen concentration in the oxygen storage tank after the compressor speed is increased is greater than the oxygen concentration before compensation, the compressor of the oxygen concentrator operates at the compressor speed after compensation; If the oxygen concentration in the oxygen storage tank after the compressor speed is increased is not greater than the oxygen concentration before compensation, the compressor of the oxygen concentrator operates at the compressor speed before compensation.

15. The oxygen generator oxygen control method according to claim 14, characterized in that: After determining whether the oxygen concentration after increasing the compressor speed is greater than the oxygen concentration before compensation, Determining whether the oxygen concentration of the oxygen storage tank is lower than a second preset oxygen concentration value; If the oxygen concentration of the oxygen storage tank is lower than the second oxygen concentration preset value, output a signal indicating that the molecular sieve needs to be replaced; If the oxygen concentration in the oxygen storage tank is not lower than the second preset oxygen concentration value, the oxygen concentrator continues to operate with current parameters until the oxygen concentration in the oxygen storage tank is lower than the second preset oxygen concentration value.

16. The oxygen generator oxygen control method according to claim 4, characterized in that: If the maximum pressure value of the oxygen storage tank after the first compensation does not reach the preset pressure threshold of the oxygen storage tank, the inflation time of the molecular sieve adsorption tank will continue to increase until the maximum pressure value of the oxygen storage tank is not less than the preset pressure threshold of the oxygen storage tank, and / or the inflation time of the molecular sieve adsorption tank is not less than the preset inflation time threshold.

17. The oxygen generator oxygen control method according to claim 2, characterized in that: If the inflation time of the molecular sieve adsorption barrel is not less than the preset inflation time threshold, it is determined that the compressor is faulty.

18. An oxygen concentrator system, characterized in that: It includes two molecular sieve adsorption barrels arranged in parallel, and switching valves respectively connected to the air inlet ends of the two molecular sieve adsorption barrels when inflated, and oxygen storage barrels respectively connected to the air outlet ends of the two molecular sieve adsorption barrels when inflated; and also includes: An oxygen storage tank pressure detection module, connected to the oxygen storage tank, for continuously monitoring the pressure value of the oxygen storage tank; The molecular sieve adsorption barrel pressure detection module is arranged between the plurality of molecular sieve adsorption barrels and the switching valve, and is used to obtain the air inlet end pressure values ​​of the plurality of molecular sieve adsorption barrels when they are inflated.

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