Oxygen generation control method for oxygen generator, and oxygen generator system

Abstract

The present application relates to the technical field of oxygen generators. Provided are an oxygen generation control method for an oxygen generator, and an oxygen generator system. The method comprises: acquiring the maximum pressure value of an oxygen storage tank after an oxygen generator stably outputs oxygen in the state of a preset compressor rotation speed and a preset maximum pressure value of a molecular sieve; determining whether the maximum pressure value of the oxygen storage tank within a preset duration 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 duration is continuously less than the preset pressure threshold value of the oxygen storage tank, acquiring a first inflation duration for which a pressure value of the molecular sieve reaches the preset maximum pressure value of the molecular sieve; determining whether the first inflation duration exceeds a preset inflation duration threshold value; and if the first inflation duration does not exceed the preset inflation duration threshold value, compensating for operating parameters of the oxygen generator. The present application improves the accuracy of determining aging compensation for the molecular sieve while automatically determining whether the molecular sieve requires aging compensation, thereby reducing the use cost of a molecular sieve oxygen generator and improving the practicality of the oxygen generator.

Description

Oxygen generator oxygen control method and oxygen generator system

[0001] This application claims priority to Chinese Patent Application No. 202411986309.2, filed on December 31, 2024, entitled “Oxygen Generator Oxygen Control Method and Oxygen Generator System”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of oxygen generator technology, specifically to an oxygen generator oxygen control method and an oxygen generator system. Background Technology

[0003] In existing oxygen generators, the molecular sieve part often ages after a period of use. This aging of the molecular sieve part leads to an increase in air resistance inside the molecular sieve cylinder, which in turn prevents the molecular sieve cylinder from producing oxygen at a qualified concentration, resulting in a decrease in the overall performance of the machine or even rendering it unusable.

[0004] When the performance of an oxygen concentrator deteriorates significantly or it becomes unusable due to the aging of the molecular sieve, the solution is often to replace the molecular sieve. However, molecular sieves are not completely ineffective; some parts remain functional and can continue to be used. Replacing the molecular sieve directly would result in a significant waste of these sieves and increase the operating cost of the oxygen concentrator.

[0005] In existing technologies, to promptly detect and remedy the aging of molecular sieves, pressure sensors are directly installed in the molecular sieve adsorption tank or oxygen concentration sensors are installed in the oxygen pipeline to obtain the pressure in the molecular sieve adsorption tank and the oxygen concentration in the oxygen pipeline to determine whether the molecular sieve needs aging. However, since the gas passing through the molecular sieve is mostly in a flowing state, its pressure is unstable, and partial aging of the molecular sieve can also cause pressure differences at different locations inside the molecular sieve. Therefore, the pressure sensor's pressure measurement is inaccurate. Similarly, the oxygen concentration sensor installed in the pipeline also suffers from the problem that the oxygen concentration is not the same at different locations in the pipeline, thus also leading to measurement inaccuracies. Summary of the Invention

[0006] This application provides an oxygen generation control method and an oxygen generator system to at least solve at least one technical problem existing in the related art.

[0007] According to one aspect of the embodiments of this application, an oxygen generator oxygen control method is provided, comprising: acquiring the maximum pressure value of the oxygen storage tank after the oxygen generator stably outputs oxygen under a preset compressor speed and a preset maximum pressure value of the molecular sieve; determining whether the maximum pressure value of the oxygen storage tank is continuously less than a preset pressure threshold of the oxygen storage tank within a preset time period; if the maximum pressure value of the oxygen storage tank is continuously less than the preset pressure threshold of the oxygen storage tank within the preset time period, acquiring a first inflation time for the molecular sieve pressure value to reach the preset maximum pressure value of the molecular sieve; determining whether the first inflation time exceeds a preset inflation time threshold; and if the first inflation time does not exceed the preset inflation time threshold, compensating the operating parameters of the oxygen generator.

[0008] As an optional implementation, the compensation of the oxygen generator's operating parameters includes: increasing the inflation time of the molecular sieve adsorption tank, and / or increasing the compressor speed.

[0009] As an optional implementation, the aeration time of the molecular sieve adsorption tank is increased to obtain a first aeration correction time, and it is determined whether the first aeration correction time is less than a preset aeration time threshold. If the first aeration correction time is less than the preset aeration time threshold, the first aeration correction time is used as the second aeration time after one compensation of the oxygen generator. If the first aeration correction time is not less than the preset aeration time threshold, the preset aeration time threshold is used as the second aeration time after one compensation of the oxygen generator, and the compressor speed is increased as the compressor speed after one compensation.

[0010] As an optional implementation, when the first inflation correction time is used as the second inflation time after one compensation of the oxygen generator: it is determined 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 generator 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.

[0011] As an optional implementation, when the first inflation correction time is used as the second inflation time after one compensation of the oxygen generator, if the oxygen concentration in the oxygen storage tank reaches the first preset oxygen concentration value, the oxygen generator operates with the parameters after one compensation; if the oxygen concentration in the oxygen storage tank does not reach the first preset oxygen concentration value, it is 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.

[0012] As an optional implementation, after determining 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, the method further includes: if the oxygen concentration in the oxygen storage tank after one compensation is higher than the oxygen concentration in the oxygen storage tank before compensation, then the second inflation time is used as the inflation time for the next pressurization operation of the molecular sieve adsorption tank; if the oxygen concentration in the oxygen storage tank after one compensation is not higher than the oxygen concentration in the oxygen storage tank before compensation, then the first inflation time is used as the inflation time for the next pressurization operation of the molecular sieve adsorption tank.

[0013] As an optional implementation, when the oxygen concentration in the oxygen storage tank does not reach the first preset oxygen concentration value, the method further includes: determining whether the oxygen concentration in the oxygen storage tank is lower than a second preset oxygen concentration value; if the oxygen concentration in the oxygen storage tank is lower than the second preset oxygen concentration value, outputting a signal to indicate that the molecular sieve needs to be replaced; wherein, the first preset oxygen concentration value is greater than the second preset oxygen concentration value.

[0014] As an optional implementation, when the preset inflation time threshold is used as the second inflation time after the first compensation, the compressor speed is increased to the compressor speed after the first compensation. Then, 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, thereby obtaining a second inflation correction time. The second inflation correction time is then used as the inflation time for the next pressurization operation of the molecular sieve adsorption tank.

[0015] 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, it is determined whether the compressor speed has reached the preset maximum effective speed; if the compressor speed has not reached the preset maximum effective speed, the compressor speed is increased 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.

[0016] As an optional implementation, 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 generator 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 generator is controlled to run at the compressor speed before compensation.

[0017] 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, it is determined whether the oxygen concentration in the oxygen storage tank is lower than a second preset oxygen concentration value. If the oxygen concentration in the oxygen storage tank is lower than the second preset oxygen concentration value, a signal is output to indicate 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 generator continues to operate with the current parameters until the oxygen concentration in the oxygen storage tank is lower than the second preset oxygen concentration value.

[0018] 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 not greater than the preset pressure threshold of the oxygen storage tank. Then, 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 tank.

[0019] As an optional implementation, it is determined 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, then the oxygen generator continues to operate with the inflation time before the last reduction in inflation time as the operating parameter.

[0020] As an optional implementation, if the oxygen concentration in the oxygen storage tank is not greater than the first preset oxygen concentration value, then 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, then the compressor of the oxygen generator operates at the compressor speed after increasing the compressor speed; if the oxygen concentration in the oxygen storage tank after increasing the compressor speed is not greater than the oxygen concentration before compensation, then the compressor of the oxygen generator operates at the compressor speed before compensation.

[0021] As an optional implementation, after determining whether the oxygen concentration after increasing the compressor speed is greater than the oxygen concentration before compensation, it is determined whether the oxygen concentration in the oxygen storage tank is lower than a second preset oxygen concentration value. If the oxygen concentration in the oxygen storage tank is lower than the second preset oxygen concentration value, a signal is output to indicate 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 generator continues to operate with the current parameters until the oxygen concentration in the oxygen storage tank is lower than the second preset oxygen concentration value.

[0022] 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 is increased 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.

[0023] As an optional implementation, if the inflation time of the molecular sieve adsorption tank is not less than the preset inflation time threshold, then the compressor is determined to be faulty.

[0024] According to one aspect of the embodiments of this application, an oxygen generator system is also provided, including two molecular sieve adsorption tanks arranged in parallel, a switching valve connected to the air inlet end of each of the two molecular sieve adsorption tanks during inflation, and an oxygen storage tank connected to the air outlet end of each of the two molecular sieve adsorption tanks during inflation; further comprising: an oxygen storage tank pressure detection module connected to the oxygen storage tank for continuously monitoring the pressure value of the oxygen storage tank; and a molecular sieve adsorption tank pressure detection module disposed between a plurality of the molecular sieve adsorption tanks and the switching valve for acquiring the air inlet end pressure values ​​of the plurality of molecular sieve adsorption tanks during inflation.

[0025] Furthermore, the oxygen production capacity of the oxygen concentrator is determined by the relationship between the maximum pressure of the oxygen storage tank and the preset pressure threshold of the oxygen storage tank within a preset time after the oxygen concentrator stably produces oxygen at a preset compressor speed and a preset maximum pressure value of the molecular sieve. If the maximum pressure of the oxygen storage tank is continuously lower than the preset pressure threshold within the preset time, it indicates that the current oxygen production capacity of the oxygen concentrator does not meet the requirements. Then, the first inflation time for the molecular sieve pressure to reach the preset maximum 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 has decreased under normal inflation conditions and cannot meet the requirements, that is, the maximum pressure of the oxygen storage tank does not reach the preset pressure threshold. This can be considered as the molecular sieve aging, which has reached the point where compensation is needed. Therefore, the operating parameters of the oxygen concentrator are compensated at this time. The above method accurately determines whether the molecular sieve in an oxygen concentrator exhibits aging. By pre-setting a pressure threshold for the oxygen storage tank, the degree of aging of the molecular sieve during aging compensation can be controlled. The pressure in the storage tank remains stable after stabilization, and the acquisition of the filling time is accurate. This method automatically determines whether molecular sieve aging compensation is needed, significantly improving the accuracy of this assessment, reducing the operating cost of the oxygen concentrator, and enhancing its practicality. Attached Figure Description

[0026] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 is a schematic flowchart of an optional oxygen generation mechanism oxygen control method provided according to an embodiment of this application.

[0029] Figure 2 is a schematic flowchart of another optional oxygen generation mechanism oxygen control method provided according to an embodiment of this application.

[0030] Figure 3 is a schematic diagram of an optional modular structure of an oxygen generator system provided according to an embodiment of this application. Detailed Implementation

[0031] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0032] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0033] As shown in Figures 1-2, to solve the above-mentioned technical problems, this application provides an oxygen generation mechanism oxygen control method, including:

[0034] S1 obtains the maximum pressure value of the oxygen storage tank after the oxygen generator stably outputs oxygen under the preset compressor speed and preset maximum molecular sieve pressure value.

[0035] S2 determines whether the maximum pressure value of the oxygen storage tank within a preset time period is continuously less than the preset pressure threshold of the oxygen storage tank.

[0036] S3 If the maximum pressure value of the oxygen storage tank is continuously less than the preset pressure threshold of the oxygen storage tank within a preset time period, obtain the first inflation time when the molecular sieve pressure value reaches the preset maximum pressure value of the molecular sieve.

[0037] S4 determines whether the first inflation time exceeds a preset inflation time threshold.

[0038] S5 If the first inflation time does not exceed the preset inflation time threshold, the operating parameters of the oxygen generator are compensated.

[0039] The oxygen production capacity of the oxygen concentrator is determined by measuring the relationship between the maximum pressure of the oxygen storage tank and a preset pressure threshold within a preset time period after the oxygen concentrator has stably produced oxygen at a preset compressor speed and a preset maximum molecular sieve pressure value. If the maximum pressure of the oxygen storage tank remains below the preset pressure threshold within the preset time period, it indicates that the current oxygen production capacity of the oxygen concentrator does not meet the requirements. In this case, 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 has decreased under normal inflation conditions and cannot meet the requirements, i.e., the maximum pressure of the oxygen storage tank does not reach the preset pressure threshold. This can be considered as aging of the molecular sieve, which has reached a level that requires compensation. Therefore, the operating parameters of the oxygen concentrator are compensated at this time. The above method accurately determines whether the molecular sieve in an oxygen concentrator exhibits aging. By pre-setting a pressure threshold for the oxygen storage tank, the degree of aging of the molecular sieve during aging compensation can be controlled. The pressure in the storage tank remains stable after stabilization, and the acquisition of the filling time is accurate. This method automatically determines whether molecular sieve aging compensation is needed, significantly improving the accuracy of this assessment, reducing the operating cost of the oxygen concentrator, and enhancing its practicality.

[0040] It should be noted that this application does not limit the setting of the preset pressure threshold and the preset inflation time threshold of the oxygen storage tank. 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 indicates that the oxygen concentrator has an operational 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 indicates that the oxygen concentrator is operating normally except for possible molecular sieve aging problems. The preset pressure threshold of the oxygen storage tank can be used to determine whether the molecular sieve needs aging compensation. Therefore, its setting can determine the aging state of the molecular sieve during compensation. The specific value of the preset pressure threshold of the oxygen storage tank can be set higher, so that the pressure value of the oxygen storage tank is relatively high but less than the threshold for molecular sieve aging compensation, so that aging compensation is performed as soon as the molecular sieve is aged or the degree of aging is low, and the aging compensation frequency will be higher. Alternatively, the specific value of the preset pressure threshold of the oxygen storage tank can be set lower, so that 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 lower. The specific value can be determined according to the usage requirements of the oxygen concentrator.

[0041] For example, if the inflation time of the molecular sieve adsorption tank is not less than the preset inflation time threshold, then the compressor is determined to be faulty.

[0042] Meanwhile, as an optional implementation, when it is determined that the molecular sieve is aging and needs compensation, the following methods can be used: increasing the aeration time of the molecular sieve adsorption tank, increasing the compressor speed, or increasing both the aeration time and compressor speed. This application does not limit the specific compensation method selected. The following will elaborate on specific aging compensation methods through examples.

[0043] As a further example, whether to increase the inflation time of the molecular sieve adsorption tank or to increase both the inflation time and the compressor speed can be determined through the following more specific steps:

[0044] S501 Increase the gas filling time of the molecular sieve adsorption tank to obtain the first gas filling correction time;

[0045] S502 determines whether the first inflation correction time is less than a preset inflation time threshold;

[0046] S503 If the first inflation correction time is less than the preset inflation time threshold, then the first inflation correction time shall be used as the second inflation time after one compensation of the oxygen concentrator.

[0047] S504 If the first inflation correction time is not less than the preset inflation time threshold, then 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.

[0048] In this application, the specific inflation time added in step S501 is not limited. It can be a fixed value. The fixed value can be set in advance according to the preset pressure threshold or preset inflation time threshold of the oxygen storage tank, 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.

[0049] First, the aeration time of the molecular sieve adsorption chamber is increased to increase the oxygen production pressure of the unaged portion of the molecular sieve within the chamber, aiming to ensure the chamber produces a qualified oxygen concentration. However, the first aeration correction time after increasing the aeration time still cannot exceed a preset aeration time threshold. Therefore, if the first aeration correction time is less than the preset aeration time threshold, it is used as the second aeration time after one compensation of the oxygen concentrator. If the first aeration correction time is not less than the preset aeration time threshold, it is used as the second aeration time after one compensation of the oxygen concentrator, and the compressor speed is increased as the compressor speed after one compensation. This embodiment, through a further aging compensation method, enables the oxygen concentrator to achieve automatic aging compensation, further improving its practicality.

[0050] For steps S501-S504 above, there are also many different implementation methods, which will be elaborated below by way of examples.

[0051] Example 1:

[0052] When the first inflation correction time is used as the second inflation time after one compensation of the oxygen generator: it is determined 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 generator 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.

[0053] Furthermore, 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.

[0054] That is, after increasing the inflation time, the oxygen production capacity of the oxygen concentrator is judged by 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, the oxygen production capacity of the oxygen concentrator can be considered to meet the requirements. However, other faults may still exist at this time, or even if the maximum pressure value of the oxygen storage tank reaches the preset pressure threshold, the oxygen production capacity of the oxygen concentrator may still not meet the requirements, such as the oxygen concentration being too low. In this case, the oxygen concentration in the oxygen storage tank can be judged. This improves the compensation effect for molecular sieve aging problems and enhances the practicality of the oxygen concentrator.

[0055] Furthermore, 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.

[0056] Furthermore, when the first inflation correction duration is used as the second inflation duration after one compensation of the oxygen generator, if the oxygen concentration in the oxygen storage tank reaches the first preset oxygen concentration value, the oxygen generator operates with the parameters after one compensation; if the oxygen concentration in the oxygen storage tank does not reach the first preset oxygen concentration value, it is 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.

[0057] Furthermore, when the first inflation correction time is used as the second inflation time after the oxygen generator has undergone one compensation, if the maximum pressure value of the oxygen storage tank reaches the preset pressure threshold of the oxygen storage tank and the oxygen concentration in the oxygen storage tank reaches the first preset oxygen concentration value, then it can be considered that the compensated molecular sieve can produce oxygen of a qualified concentration. Therefore, controlling the oxygen generator to operate with the parameters after one compensation can achieve the expected oxygen production effect. This can further improve the effect of aging compensation while ensuring the normal operation of the oxygen generator. The setting of the first preset oxygen concentration value can be used to judge whether the oxygen production capacity of the molecular sieve meets the requirements from the perspective of oxygen concentration. That is, if the oxygen concentration is lower than the first preset oxygen concentration value, it is considered that the oxygen production capacity of the molecular sieve has not met expectations. Therefore, the setting of the first preset oxygen concentration value can be determined according to the usage scenario, usage intensity, and the selection of the oxygen generator itself; for example, it can be 88%.

[0058] However, if the oxygen concentration in the oxygen storage tank does not reach the first preset oxygen concentration value, it means that the molecular sieve still failed to 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.

[0059] Furthermore, after determining 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, the process further includes: if the oxygen concentration in the oxygen storage tank after one compensation is higher than the oxygen concentration in the oxygen storage tank before compensation, then the second inflation time is used as the inflation time for the next pressurization operation of the molecular sieve adsorption tank; if the oxygen concentration in the oxygen storage tank after one compensation is not higher than the oxygen concentration in the oxygen storage tank before compensation, then the first inflation time is used as the inflation time for the next pressurization operation of the molecular sieve adsorption tank. That is, when the oxygen generator fails to achieve the expected oxygen production effect after aging compensation, it will operate with parameters that provide a better oxygen production effect.

[0060] Furthermore, if the oxygen concentration in the oxygen storage tank does not reach the first preset oxygen concentration value, it indicates that the molecular sieve still failed to achieve the expected oxygen production effect after one compensation, which may also mean that the molecular sieve is no longer usable. In this case, it is also possible to: determine whether the oxygen concentration in the oxygen storage tank is lower than the second preset oxygen concentration value; if the oxygen concentration in the oxygen storage tank is lower than the second preset oxygen concentration value, output a signal to indicate that the molecular sieve needs to be replaced; wherein, the first preset oxygen concentration value is greater than the second preset oxygen concentration value.

[0061] The setting of the second oxygen concentration preset value can be used to determine whether the molecular sieve can still 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. Therefore, the setting of the second oxygen concentration preset value can be determined according to the usage scenario, usage intensity and the selection of the oxygen generator itself. For example, it can be 82%.

[0062] Example 2:

[0063] When the preset inflation time threshold is used as the second inflation time after the first compensation, the compressor speed is increased to the compressor speed after the first compensation. Then, 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, and a second inflation correction time is obtained. The second inflation correction time is used as the inflation time for the next pressurization operation of the molecular sieve adsorption tank.

[0064] That is, after increasing the aeration time and compressor speed, the oxygen production capacity of the oxygen concentrator is judged by 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 first compensation reaches the preset pressure threshold, then the oxygen production capacity of the oxygen concentrator can be considered to meet the requirements. However, if the maximum pressure value of the oxygen storage tank after the first compensation is greater than the preset pressure threshold, it can be considered that the oxygen production capacity of the oxygen concentrator exceeds expectations. Running with the current operating parameters will result in wasted oxygen production and shorten the service life of the oxygen concentrator. Therefore, a second compensation can be performed to reduce the aeration time of the molecular sieve adsorption tank, resulting in a second aeration correction time. This second aeration correction time is used as the aeration time of the molecular sieve adsorption tank. The specific value of the aeration time reduction in this application is not limited, but preferably it can be set to be less than the aeration time increased during the first compensation. This ensures the oxygen production effect of the oxygen concentrator and further extends the service life of the oxygen concentrator and the molecular sieve.

[0065] Furthermore, if the maximum pressure value of the oxygen storage tank is less than the preset pressure threshold of the oxygen storage tank, it is determined whether the compressor speed has reached the preset maximum effective speed; if the compressor speed has not reached the preset maximum effective speed, the compressor speed is increased 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.

[0066] When the maximum pressure value of the oxygen storage tank is less than the preset pressure threshold of the oxygen storage tank, the compressor speed is further increased, which can further compensate for the molecular sieve that has not achieved the expected oxygen production effect, improve the compensation effect of the molecular sieve, thereby increasing the service life of the molecular sieve and reducing the cost of use.

[0067] 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 generator 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 generator is controlled to run at the compressor speed before compensation.

[0068] Furthermore, 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.

[0069] Understandably, at this time, the inflation time of the molecular sieve adsorption cylinder of the oxygen generator is the preset inflation time threshold.

[0070] Furthermore, by determining whether the oxygen concentration in the oxygen storage tank after compensation is higher than the oxygen concentration before compensation, the operating parameters for better oxygen generation by molecular sieve can be identified.

[0071] Further, 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, it is determined whether the oxygen concentration in the oxygen storage tank is lower than the second preset oxygen concentration value; if the oxygen concentration in the oxygen storage tank is lower than the second preset oxygen concentration value, a signal is output to indicate 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 generator continues to operate with the current parameters until the oxygen concentration in the oxygen storage tank is lower than the second preset oxygen concentration value.

[0072] The setting of the second oxygen concentration preset value can be used to determine whether the molecular sieve can still 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. Therefore, the setting of the second oxygen concentration can be determined according to the usage scenario, usage intensity and the selection of the oxygen generator itself.

[0073] In addition, it can be determined whether the oxygen concentration in the oxygen storage tank can reach the first preset oxygen concentration value. If the oxygen concentration in the oxygen storage tank does not reach the first preset oxygen concentration 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 preset oxygen concentration value, and the oxygen generator continues to operate with the current parameters until the oxygen concentration in the oxygen storage tank is lower than the second preset oxygen concentration value.

[0074] Example 3:

[0075] When the preset inflation time threshold is used as the second inflation time after the first compensation, if the maximum pressure value of the oxygen storage tank is greater than the preset pressure threshold of the oxygen storage tank after increasing the compressor speed, a second compensation is performed to reduce the inflation time of the molecular sieve adsorption tank. If the maximum pressure value of the oxygen storage tank is not greater than the preset pressure threshold of the oxygen storage tank after the inflation time is further reduced, the inflation time will no longer be reduced (this is recorded as the last reduction of inflation time). The inflation time before the last reduction of inflation time (i.e., the inflation time after the penultimate reduction of inflation time) is used as the inflation time for the next pressurization operation of the molecular sieve adsorption tank.

[0076] This setting can further improve the compensation effect of molecular sieve aging compensation.

[0077] Furthermore, it is determined 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, then the oxygen generator continues to operate with the inflation time before the last reduction in inflation time as the operating parameter.

[0078] Furthermore, 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.

[0079] Furthermore, if the oxygen concentration in the oxygen storage tank is not greater than the first preset oxygen concentration value, then 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, then the compressor of the oxygen generator operates 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, then the compressor of the oxygen generator operates at the compressor speed before compensation.

[0080] Understandably, at this time, the inflation time of the molecular sieve adsorption cylinder of the oxygen generator is the preset inflation time threshold.

[0081] Further, after determining whether the oxygen concentration after increasing the compressor speed is greater than the oxygen concentration before compensation, it is determined whether the oxygen concentration in the oxygen storage tank is lower than the second preset oxygen concentration value; if the oxygen concentration in the oxygen storage tank is lower than the second preset oxygen concentration value, a signal is output to indicate 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 generator continues to operate with the current parameters until the oxygen concentration in the oxygen storage tank is lower than the second preset oxygen concentration value.

[0082] Furthermore, as a more specific implementation method, the oxygen generator control can be implemented according to Embodiments 1 to 3 above, or a combination of Embodiments 1 to 3 above, as shown in Figure 2. This application does not limit this. Alternatively, any combination of steps in Figure 2 that can solve the technical problem of inaccurate molecular sieve aging judgment is also within the scope of protection of this application.

[0083] According to one aspect of the embodiments of this application, an oxygen generator system is also provided, including two molecular sieve adsorption tanks arranged in parallel, a switching valve connected to the air inlet end of each of the two molecular sieve adsorption tanks during inflation, and an oxygen storage tank connected to the air outlet end of each of the two molecular sieve adsorption tanks during inflation; further comprising: an oxygen storage tank pressure detection module connected to the oxygen storage tank for continuously monitoring the pressure value of the oxygen storage tank; and a molecular sieve adsorption tank pressure detection module disposed between a plurality of the molecular sieve adsorption tanks and the switching valve for acquiring the air inlet end pressure values ​​of the plurality of molecular sieve adsorption tanks during inflation.

[0084] As shown in Figure 3, three pressure monitoring points are added to the oxygen generator's gas path system. Pressure monitoring points 1 and 2 are located between the molecular sieve adsorption tanks A and B, respectively, and the switching valve; these are the molecular sieve adsorption tank pressure detection modules. Pressure monitoring point 3 is the oxygen storage tank pressure detection module, which detects the gas pressure value inside the oxygen storage tank. During normal operation, when the maximum pressure values ​​at pressure monitoring points 1 and 2 reach the system set value, the switching valve activates, switching the intake and exhaust of the molecular sieve tanks.

[0085] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0086] If the integrated units in the above embodiments are implemented as software functional units and sold or used as independent products, they can be stored in the aforementioned computer-readable storage medium. Based on this understanding, the technical solution of this 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 cause one or more electronic devices (which may be personal computers, servers, or network devices, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application.

[0087] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0088] In the several embodiments provided in this application, it should be understood that the disclosed client can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, indirect coupling or communication connection between units or modules, and may be electrical or other forms.

[0089] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of the solution provided in this embodiment, depending on actual needs.

[0090] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0091] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0092] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. An oxygen generation mechanism oxygen control method, comprising: Obtain the maximum pressure value of the oxygen storage tank after the oxygen generator stably outputs oxygen under preset compressor speed and preset maximum molecular sieve pressure value; Determine whether the maximum pressure value of the oxygen storage tank within a preset time period is continuously less than the preset pressure threshold of the oxygen storage tank. If the maximum pressure value of the oxygen storage tank is continuously less than the preset pressure threshold of the oxygen storage tank within a preset time period, the first inflation time when the molecular sieve pressure value reaches the preset maximum pressure value of the molecular sieve is obtained. Determine 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 generator are compensated.

2. The oxygen control method for an oxygen generator as described in claim 1, wherein, The compensation for the operating parameters of the oxygen concentrator includes: Increase the gas filling time of the molecular sieve adsorption tank, and / or increase the compressor speed.

3. The oxygen control method for an oxygen generator as described in claim 2, wherein, Increase the aeration time of the molecular sieve adsorption tank to obtain a first aeration correction time, and determine whether the first aeration correction time is less than a preset aeration time threshold. If the first inflation correction time is less than the preset inflation time threshold, then 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, then the preset inflation time threshold is used as the second inflation time after the oxygen generator is compensated once, and the compressor speed is increased as the compressor speed after the first compensation.

4. The oxygen control method for an oxygen generator as described in claim 3, wherein, When the first inflation correction duration is used as the second inflation duration after one compensation of the oxygen concentrator: 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 by the oxygen generator reaches the preset pressure threshold of the oxygen storage tank, it is determined whether the oxygen concentration of the oxygen storage tank has reached the first preset oxygen concentration value.

5. The oxygen control method for an oxygen generator as described in claim 4, wherein, When the first inflation correction time is used as the second inflation time after one compensation of the oxygen generator, if the oxygen concentration in the oxygen storage tank reaches the first preset oxygen concentration value, the oxygen generator will operate with the parameters after one compensation. If the oxygen concentration in the oxygen storage tank does not reach the first preset oxygen concentration value, then it is determined whether the oxygen concentration in the oxygen storage tank after compensation is higher than the oxygen concentration in the oxygen storage tank before compensation.

6. The oxygen control method for an oxygen generator as described in claim 5, wherein, After determining whether the oxygen concentration in the oxygen storage tank after compensation is higher than the oxygen concentration before compensation, the method further includes: If the oxygen concentration in the oxygen storage tank after the first compensation is higher than the oxygen concentration in the oxygen storage tank before compensation, then the second inflation time shall be used as the inflation time for the next pressurization operation of the molecular sieve adsorption tank. If the oxygen concentration in the oxygen storage tank after the first compensation is not higher than the oxygen concentration in the oxygen storage tank before the compensation, then the first inflation time shall be used as the inflation time for the next pressurization operation of the molecular sieve adsorption tank.

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

8. The oxygen control method for an oxygen generator as described in claim 3, wherein, When the preset inflation time threshold is used as the second inflation time after one compensation, and the compressor speed is increased to 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, resulting in a second inflation correction time. The second inflation correction time is then used as the inflation time for the next pressurization operation of the molecular sieve adsorption tank.

9. The oxygen control method for an oxygen generator as described in claim 8, wherein, 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 does not reach the preset maximum effective speed, the compressor speed 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 compressor speed reaches the preset maximum effective speed.

10. The oxygen control method for an oxygen generator as described in claim 9, wherein, If the compressor speed reaches the preset maximum effective speed, determine 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, then the compressor of the oxygen generator 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, then the compressor of the oxygen generator is controlled to run at the compressor speed before compensation.

11. The oxygen control method for an oxygen generator as described in claim 8, wherein, 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 until the maximum pressure value of the oxygen storage tank is not greater than the preset pressure threshold of the oxygen storage tank. Then, the inflation time before the last reduction in inflation time is used as the second correction time and is used as the inflation time for the next pressurization operation of the molecular sieve adsorption tank.

12. The oxygen control method for an oxygen generator as described in claim 11, wherein, If 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, then the oxygen generator will continue to operate with the inflation time before the last reduction in inflation time as the operating parameter.

13. The oxygen control method for an oxygen generator as described in claim 4, wherein, 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.

14. The oxygen control method for an oxygen generator as described in claim 2, wherein, If the inflation time of the molecular sieve adsorption tank is not less than the preset inflation time threshold, then the compressor is determined to be faulty.

15. An oxygen generator system, wherein, It includes two molecular sieve adsorption tanks arranged in parallel, a switching valve connected to the air inlet of each of the two molecular sieve adsorption tanks during inflation, and an oxygen storage tank connected to the air outlet of each of the two molecular sieve adsorption tanks during inflation; it also includes: An oxygen storage tank pressure detection module is connected to the oxygen storage tank and is used to continuously monitor the pressure value of the oxygen storage tank. A molecular sieve adsorption tank pressure detection module is set between multiple molecular sieve adsorption tanks and the switching valve to obtain the inlet pressure value of multiple molecular sieve adsorption tanks when they are being filled with gas.

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