CN111694382B - Gas supply concentration adjusting method, gas supply concentration adjusting system and oxygenerator - Google Patents
Gas supply concentration adjusting method, gas supply concentration adjusting system and oxygenerator Download PDFInfo
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- CN111694382B CN111694382B CN201910197343.4A CN201910197343A CN111694382B CN 111694382 B CN111694382 B CN 111694382B CN 201910197343 A CN201910197343 A CN 201910197343A CN 111694382 B CN111694382 B CN 111694382B
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- 238000000034 method Methods 0.000 title claims abstract description 46
- 230000035565 breathing frequency Effects 0.000 claims abstract description 20
- 238000012937 correction Methods 0.000 claims description 80
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 238000004364 calculation method Methods 0.000 claims description 6
- 230000036387 respiratory rate Effects 0.000 claims description 6
- 230000036391 respiratory frequency Effects 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 179
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 31
- 239000001301 oxygen Substances 0.000 description 31
- 229910052760 oxygen Inorganic materials 0.000 description 31
- 238000010586 diagram Methods 0.000 description 11
- 230000006870 function Effects 0.000 description 8
- 238000001514 detection method Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000001580 bacterial effect Effects 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 230000004075 alteration Effects 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000000241 respiratory effect Effects 0.000 description 2
- 230000003584 silencer Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D11/00—Control of flow ratio
- G05D11/02—Controlling ratio of two or more flows of fluid or fluent material
- G05D11/13—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means
- G05D11/131—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means by measuring the values related to the quantity of the individual components
- G05D11/132—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means by measuring the values related to the quantity of the individual components by controlling the flow of the individual components
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Abstract
The invention provides a method and a system for adjusting the concentration of air supply and an oxygenerator, wherein the method for adjusting the concentration of air supply comprises the following steps: obtaining a breathing frequency of a user; setting the opening time of the air supply electromagnetic valve in each air supply period according to the breathing frequency of the user; measuring the concentration of the gas at each gas supply cycle; and adjusting the opening time according to the concentration of the gas so that the concentration of the gas is in a first range. The invention controls the opening time of the air supply electromagnetic valve based on the gas concentration, and can ensure that the gas concentration can meet the use requirement of a user.
Description
Technical Field
The embodiment of the invention relates to the technical field of gas supply, in particular to a gas supply concentration adjusting method, a gas supply concentration adjusting system and an oxygenerator.
Background
In the prior art, particularly in the medical field, gas supply apparatuses for generating a prescribed type of gas and supplying the gas to a user for inhalation by the user are widely used. Such air supply devices are, for example, oxygenerators, atomizers, etc.
It should be noted that the foregoing description of the background art is only for the purpose of providing a clear and complete description of the technical solution of the present invention and is presented for the convenience of understanding by those skilled in the art. The above-described solutions are not considered to be known to the person skilled in the art simply because they are set forth in the background of the invention section.
Disclosure of Invention
The inventor found that portable oxygenerators sold in the market all provide oxygen during inspiration in an intermittent or pulsed manner. However, the amount of oxygen generated by the pulses, as well as the oxygen concentration, cannot meet the user's needs due to limitations in the product's own capabilities.
In order to solve at least one of the problems, an embodiment of the present invention provides a gas supply concentration adjustment method, a gas supply concentration adjustment system, and an oxygen generator, which adjust an opening time of a gas supply electromagnetic valve based on a gas concentration or a gas concentration and a gas pressure in a gas storage tank, so as to ensure that the gas concentration or the gas concentration and the gas flow can meet a user demand of a user.
According to a first aspect of an embodiment of the present invention, there is provided a method for adjusting a supply gas concentration, wherein the method includes:
Obtaining a breathing frequency of a user;
Setting the opening time of the air supply electromagnetic valve in each air supply period according to the breathing frequency of the user;
Measuring the concentration of the gas at each gas supply cycle;
and adjusting the opening time according to the concentration of the gas so that the concentration of the gas is in a first range.
According to a second aspect of an embodiment of the present invention, there is provided a supply gas concentration adjustment system, wherein the supply gas concentration adjustment system includes:
A first sensor that measures a respiratory rate of a user;
a second sensor that measures a concentration of gas at each gas supply cycle;
And a controller which sets an opening time of the air supply solenoid valve at each air supply period according to the respiratory frequency, and adjusts the opening time according to the concentration of the air so that the concentration of the air is within a first range.
According to a third aspect of embodiments of the present invention, there is provided an oxygenerator comprising the supply gas concentration adjustment system of the aforementioned second aspect.
According to a fourth aspect of embodiments of the present invention, there is provided a computer readable program, wherein the program, when executed in an air supply device, causes a computer to perform the method of the preceding first aspect in the air supply device.
According to a fifth aspect of embodiments of the present invention, there is provided a storage medium storing a computer-readable program, wherein the computer-readable program causes a computer to execute the method of the foregoing first aspect in a gas supply apparatus.
The embodiment of the invention has the beneficial effects that the opening time of the air supply electromagnetic valve is controlled based on the gas concentration or the gas concentration and the air pressure in the air storage tank, so that the gas concentration or the gas concentration and the gas flow can be ensured to meet the use requirement of a user.
Specific embodiments of the invention are disclosed in detail below with reference to the following description and drawings, indicating the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the invention are not limited in scope thereby. The embodiments of the invention include many variations, modifications and equivalents within the spirit and scope of the appended claims.
Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments in combination with or instead of the features of the other embodiments.
It should be emphasized that the term "comprises/comprising" when used herein is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. It is evident that the drawings in the following description are only some embodiments of the present invention and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
In the drawings:
FIG. 1 is a schematic view showing an external appearance of an oxygenerator according to an embodiment of the present invention;
FIG. 2 is a schematic view showing an internal constitution of an oxygenerator according to an embodiment of the present invention;
FIG. 3 is a schematic view of a method for adjusting the concentration of supplied air according to example 1 of the present invention;
FIG. 4 is a schematic diagram of respiratory rate;
FIG. 5 is a schematic diagram of one embodiment of a method of regulating the supply gas concentration shown in FIG. 3;
FIG. 6 is another schematic view of the method for adjusting the supply gas concentration of embodiment 1 of the present invention;
FIG. 7 is a schematic diagram of one embodiment of a method of regulating the supply gas concentration shown in FIG. 6;
FIG. 8 is a schematic diagram of another embodiment of the method of regulating the supply gas concentration shown in FIG. 6;
FIG. 9 is a schematic view of a gas supply concentration adjustment system of embodiment 2 of the present invention;
fig. 10 is a schematic view showing another internal configuration of the oxygenerator according to the embodiment of the present invention.
Detailed Description
The foregoing and other features of the invention will become apparent from the following description, taken in conjunction with the accompanying drawings. In the specification and drawings, there have been specifically disclosed specific embodiments of the invention that are indicative of some of the ways in which the principles of the invention may be employed, it being understood that the invention is not limited to the specific embodiments described, but, on the contrary, the invention includes all modifications, variations and equivalents falling within the scope of the appended claims.
In the embodiments of the present invention, the terms "first," "second," and the like are used to distinguish between different elements from each other by name, but do not indicate spatial arrangement or time sequence of the elements, and the elements should not be limited by the terms. The term "and/or" includes any and all combinations of one or more of the associated listed terms.
In embodiments of the present invention, the singular forms "a," an, "and" the "include plural referents and should be construed broadly to mean" one "or" one type "and not limited to" one "or" another; furthermore, the term "comprising" is to be interpreted as including both the singular and the plural, unless the context clearly dictates otherwise. Furthermore, the term "in accordance with" should be understood to be "at least partially in accordance with," and the term "based on" should be understood to be "at least partially in accordance with," unless the context clearly indicates otherwise.
For convenience of explanation, the embodiment of the present invention will be described taking an example in which the air supply device is an oxygenerator, but the embodiment of the present invention is not limited thereto, and for example, the air supply device may be another air supply device such as an atomizer.
Fig. 1 is a schematic view showing an external appearance of an oxygenerator according to an embodiment of the present invention, and fig. 2 is a schematic view showing an internal construction of the oxygenerator shown in fig. 1. As shown in fig. 1, the oxygenerator includes: a cabinet housing 100 and an oxygen outlet 200. As shown in fig. 2, the oxygenerator further includes: pressure regulating valve 300, heat dissipating device 400, integrated adsorption tower 500, bacterial filter 600, and oxygen supply system 700. The supply gas concentration adjustment method of the present embodiment may be applied to the oxygen supply system 700, that is, the oxygen supply system 700 may include the supply gas concentration adjustment system of the present embodiment.
Various implementations of embodiments of the present invention are described below with reference to the accompanying drawings.
Example 1
The present embodiment provides a method of adjusting a supply gas concentration. The method may be used to generate a specified type of gas and provide the gas to a user's gas supply device, which may be, for example, an oxygenerator, an atomizer, or the like.
Fig. 3 is a schematic diagram of the supply gas concentration adjustment method of the present embodiment. As shown in fig. 3, the method includes:
step 301: obtaining a breathing frequency of a user;
Step 302: setting the opening time of the air supply electromagnetic valve in each air supply period according to the breathing frequency of the user;
Step 303: measuring the concentration of the gas at each gas supply cycle;
step 304: and adjusting the opening time according to the concentration of the gas so that the concentration of the gas is in a first range.
In this embodiment, the opening time of the air supply solenoid valve is short due to the capacity limitation of the compressor, and the air is supplied to the user by the pulse at the moment of inhalation of the user. The gas reaches the lung of the user through the gas pipe of the user and is diffused to the alveoli, so that the gas concentration reaches saturation.
In this embodiment, the breathing frequency of the user (step 301) and the concentration of the gas (step 303) can be obtained by measuring with a sensor, and the type and the measurement mode of the sensor are not limited in this embodiment. In addition, the breathing frequency of the user (step 301) may also be obtained through calculation, and the obtaining manner is not limited in this embodiment.
In this embodiment, the opening time of the air supply solenoid valve in each air supply cycle may be set according to the breathing frequency of the user (step 302), and the specific setting method is not limited in this embodiment, and reference may be made to the prior art. The opening time is an initial value of the opening time of the air supply electromagnetic valve, the initial value is adjusted according to the air concentration, and in the next air supply period, the electromagnetic valve is controlled according to the adjusted opening time, so that the air concentration meets the requirement of a user.
Fig. 4 is a schematic diagram of the measured respiratory rate of the user, as shown in fig. 4, according to the method of the present embodiment, the opening time T of the air supply solenoid valve in each air supply period T is set according to the measured respiratory rate of the user, and then the opening time T is adjusted according to the concentration of the air, so that the concentration of the air is within a first range, thereby ensuring the concentration of the air in the next air supply period. In this embodiment, as shown in fig. 4, the adjusted opening time is denoted by T', and the opening time of the air supply solenoid valve is adjusted in real time in each air supply period, so as to meet the use requirement of the user on the oxygen concentration.
In the present embodiment, a threshold value (referred to as a first threshold value) that ensures the concentration of gas required by the user may be set, and when the concentration of gas is less than the first threshold value, the concentration of gas may be increased by shortening the opening time of the gas supply solenoid valve.
Fig. 5 is a schematic diagram of one embodiment of the supply gas concentration adjustment method of the present example, as shown in fig. 5, including:
step 501: obtaining a breathing frequency of a user;
Step 502: setting initial opening time T of the air supply electromagnetic valve;
Step 503: measuring the concentration of the gas at each gas supply cycle;
Step 504: judging whether the concentration of the gas is smaller than a first threshold value; if yes, go to step 505, otherwise go to step 506;
Step 505: subtracting the first predetermined time from the initial on time as an adjusted on time, and returning to step 503;
Step 506: the initial on-time is added to the second predetermined time as the adjusted on-time and returns to step 503.
In this embodiment, when the gas concentration is smaller than the preset first threshold, the opening time of the gas supply solenoid valve is reduced, the gas concentration in the next gas supply period is increased, and the requirement of the user on the gas concentration is met; and when the gas concentration is not less than the preset first threshold value, increasing the opening time of the gas supply electromagnetic valve, and ensuring the maximization of the gas quantity when the gas concentration is satisfied. By implementing the above processing in each gas supply period, the opening time of the gas supply electromagnetic valve can be adjusted in real time, and the use requirements of users on the gas concentration and the gas quantity are ensured.
In this embodiment, the opening time of the air supply electromagnetic valve is greatly adjusted according to the breathing frequency of the user, and then the opening time of the air supply electromagnetic valve is finely adjusted according to the concentration of the air by using the first predetermined time or the second predetermined time, so that the requirement of the user on the concentration of the air is met, and the requirement of the user on the amount of the air is met.
In this embodiment, the implementation of steps 501 to 503 is the same as steps 301 to 303 of fig. 3, and the description thereof is omitted here.
In this embodiment, the first threshold may be set to be slightly higher than the minimum gas concentration required by the user, for example, if the minimum gas concentration required by the user is 82%, the first threshold may be set to be 90%, so that the gas concentration may be adjusted up and down by 90%, thereby satisfying both the use requirement of the user for the gas concentration and the use requirement of the user for the gas amount. The above is merely an example, but the present embodiment is not limited thereto, and the first threshold value may be set to other values according to experimental data, clinical data, or the kind of air supply. In this embodiment, the values of the first predetermined time and the second predetermined time are not limited, and may be determined according to the on time set in the step 502 in combination with other related factors, such as experimental data, clinical data, or the type of air supply.
In this embodiment, the implementation of step 501 may be based on a user's operation of the air supply device, for example, the user pressing a start button or a restart button, turning on the air supply device to start using the air supply device; or may be based on the needs of the system, e.g. the system activates step 501 according to the system settings. This embodiment is not limited thereto. In addition, in this embodiment, the user or the system may end the flow of fig. 5 at any time point, and the embodiment does not limit a specific implementation of the flow.
Fig. 6 is another schematic diagram of the supply gas concentration adjustment method of the present embodiment. As shown in fig. 6, the method includes:
Step 601: obtaining a breathing frequency of a user;
Step 602: setting the opening time of the air supply electromagnetic valve in each air supply period according to the breathing frequency of the user;
step 603: measuring the concentration of the gas and the air pressure in the air storage tank in each air supply period;
Step 604: the opening time is adjusted according to the concentration of the gas and the air pressure in the air storage tank so that the concentration of the gas is in a first range and the flow rate of the gas is in a second range.
In this embodiment, the gas concentration and the air pressure in the air storage tank are comprehensively considered to control the opening time of the air supply electromagnetic valve, and the flow rate of the gas can further meet the requirements of the user on the premise that the gas concentration meets the requirements of the user.
In this embodiment, the implementation manner of step 601 and step 602 and the measurement manner of the concentration of the gas in step 603 are the same as those of steps 301 to 303 in the embodiment shown in fig. 3, and the description thereof is omitted here.
In this embodiment, the air pressure in the air tank (step 603) may also be obtained by measuring the air pressure by a sensor, and the type and the measuring mode of the sensor are not limited in this embodiment. When the opening time of the air supply electromagnetic valve is changed, the atmospheric pressure in the air storage tank is changed, the air pressure in the air storage tank directly influences the flow rate of the supplied air, and when the air pressure is large, the flow rate of the supplied air is increased, but the air concentration is reduced; when the gas pressure is small, the flow rate of the supplied gas decreases, but the gas concentration increases. According to the embodiment, the opening time of the air supply electromagnetic valve is adjusted by comprehensively considering the gas concentration and the air pressure of the air storage tank, so that the requirement of a user on the gas concentration is met, and the requirement of the user on the gas flow is met.
Fig. 7 is a schematic diagram of one embodiment of the supply gas concentration adjustment method of the present example, as shown in fig. 7, including:
step 701: obtaining a breathing frequency of a user;
step 702: setting initial opening time T of the air supply electromagnetic valve;
Step 703: measuring the concentration of the gas and the air pressure in the air storage tank in each air supply period;
step 704: determining correction time delta T according to the air pressure in the air storage tank;
step 705: judging whether the concentration of the gas is smaller than a first threshold value; if yes, go to step 706, otherwise go to step 707;
Step 706: subtracting the correction time from the initial on time by a first predetermined time as an adjusted time, and returning to step 703;
Step 707: the initial on time minus the correction time plus a second predetermined time is taken as an adjusted time and returns to step 703.
In this embodiment, the initial opening time of the air supply solenoid valve is corrected according to the air pressure in the air storage tank, and when the air concentration is smaller than the preset first threshold value, the corrected opening time of the air supply solenoid valve is reduced, the air concentration in the next air supply period is increased, and the requirement of the user on the air concentration is met; and when the gas concentration is not less than the preset first threshold value, increasing the opening time of the corrected gas supply electromagnetic valve, and ensuring the maximization of the gas quantity when the gas concentration is satisfied. By implementing the above processing in each air supply period, the opening time of the air supply electromagnetic valve can be adjusted in real time, and the use requirements of users on the air concentration and the air flow are ensured.
In this embodiment, the opening time of the air supply solenoid valve is greatly adjusted according to the breathing frequency of the user, and the opening time is corrected according to the air pressure in the air storage tank, and then the corrected opening time is finely adjusted according to the concentration of the air by using the first predetermined time or the second predetermined time, so that the requirement of the user on the concentration of the air is met, and the requirement of the user on the amount of the air is met.
In this embodiment, the implementation of steps 701 to 703 is the same as steps 601 to 603 of fig. 6, and the description thereof is omitted here.
In this embodiment, in step 704, the correction time corresponding to the air pressure in the current air tank may be determined by a table look-up method. For example, in step 704, the air pressure in the air tank may be compared with a preset "air pressure and correction time comparison table", and the correction time corresponding to the air pressure in the air tank may be determined by means of a table lookup.
Table 1 is an example of a table of comparison of air pressure with correction time.
TABLE 1
As shown in table 1, different air pressure values correspond to different correction times, and when the air pressure in the air storage tank is obtained through measurement, the corresponding correction times can be determined by looking up such a table. Table 1 is merely illustrative, and different tables like table 1 may be preset to determine correction times corresponding to different reservoir pressures, depending on the type of supply, the breathing rate of the user, etc.
In table 1, each gas pressure value corresponds to one or more correction times, whereby not only the correction time can be determined from the gas pressure in the gas tank, but also the adjusted correction time can be determined from the level of decrease in the gas concentration, as will be described later. In table 1, the correspondence between the air pressure value and the correction time is shown, and in other embodiments, a table of the correspondence between the air pressure range and the correction time may be preset, and the correction time corresponding to the air pressure in the air storage tank may be found by a table look-up method, which is not described herein.
In this embodiment, in step 704, the correction time required for the current air pressure in the air tank may be calculated by a function calculation. For example, in step 704, the correction time may be calculated based on the measured air pressure in the air tank using a preset "correction time calculation formula" which is a relational expression between the air pressure in the air tank and the correction time, and the corresponding correction time may be obtained by substituting the measured air pressure in the air tank into the relational expression.
The present embodiment is not limited to the implementation of the relational expression, and for example, the relational expression may be:
ΔT＝aX+b
Wherein Δt is the correction time, X is the measured air pressure in the air tank, a and b are constants, and b is an initial value of Δt.
In this embodiment, the "first threshold value" of step 705, the "first predetermined time" of step 706, the "second predetermined time" of step 707, and the start and end of the method of fig. 7 are the same as those of the embodiment of fig. 5, and the description thereof is omitted here.
Fig. 8 is a schematic diagram of another implementation of the supply gas concentration adjustment method of the present example, as shown in fig. 8, the method including:
step 801: obtaining a breathing frequency of a user;
Step 802: setting initial opening time T of the air supply electromagnetic valve;
Step 803: measuring the concentration of the gas and the air pressure in the air storage tank in each air supply period;
Step 804: determining correction time delta T according to the air pressure in the air storage tank;
step 805: judging whether the concentration of the gas is smaller than a first threshold value; if yes, go to step 806, otherwise go to step 807;
Step 806: judging whether the absolute value of the difference between the concentration of the gas and the first threshold is greater than a second threshold, if yes, executing step 808, otherwise executing step 809;
Step 807: subtracting the correction time from the initial on time plus a second predetermined time as an adjusted time, and returning to step 803;
step 808: subtracting the correction time from the initial on time and subtracting a first predetermined time as an adjusted time, and returning to step 803;
Step 809: and reducing the adjustment amplitude of the correction time, and taking the opening time minus the adjusted correction time as the adjusted opening time.
In the present embodiment, the initial opening time of the gas supply solenoid valve is corrected based on the gas pressure in the gas tank, and when the gas concentration is less than the first threshold value set in advance, the method of adjusting the opening time of the solenoid valve is continuously determined based on the level of decrease in the gas concentration, and when the level of decrease in the gas concentration is not large (no in step 806), the opening time of the solenoid valve is adjusted by decreasing the adjustment range of the correction time; under the condition that the level of the gas concentration reduction is relatively large (yes in step 806), the opening time of the electromagnetic valve is quickly adjusted through the first preset time so as to meet the requirement of a user on the gas concentration; in addition, when the gas concentration is not less than the first threshold value, the opening time of the corrected gas supply electromagnetic valve is increased, and the maximization of the gas amount is ensured when the gas concentration is satisfied. By implementing the above processing in each air supply period, the opening time of the air supply electromagnetic valve can be adjusted in real time, and the use requirements of users on the air concentration and the air flow are ensured.
In this embodiment, similarly to the embodiment of fig. 7, the opening time of the air supply solenoid valve is first greatly adjusted according to the breathing frequency of the user, and the opening time is corrected according to the air pressure in the air tank, and then the opening time of the solenoid valve is finely adjusted according to the concentration of the air by using the first predetermined time or the second predetermined time or the amplitude of the correction time, so that the requirement of the user on the concentration of the air is satisfied, and the requirement of the user on the amount of the air is satisfied.
In this embodiment, the implementation of steps 801 to 803 is the same as steps 601 to 603 of fig. 6, and the description thereof is omitted here.
In this embodiment, the steps 804 to 805 and 808 are implemented in the same manner as the steps 704 to 706 in fig. 7, and the description thereof is omitted here.
In the present embodiment, in step 806, in the case where the gas concentration is smaller than the above-described first threshold value set in advance, it is continued to determine whether the gas concentration is too low, that is, the absolute value of the difference between the gas concentration and the first threshold value is larger than the second threshold value, and if it is determined that it is necessary to rapidly increase the gas concentration, the opening time of the gas supply solenoid valve is reduced by subtracting the "first predetermined time" from the corrected opening time (t+Δt) to increase the gas concentration (step 807), at which time the first predetermined time may be set to a larger value so that the gas concentration is rapidly increased in the next gas supply cycle; if the determination is negative, i.e., the current gas concentration is less than the first threshold, but it is tolerable, the adjustment amplitude of the correction time Δt is reduced (step 809), i.e., the opening time of the gas supply solenoid valve is increased in smaller steps relative to the corrected opening time (t+Δt) to increase the gas concentration for the next gas supply cycle.
In step 809, the manner of reducing the adjustment range of the correction time Δt is different depending on the manner of determining the correction time Δt. If the correction time delta T is determined by a table look-up mode, the correction time smaller than the delta T can be used as the adjusted correction time; taking table 1 as an example, if the current air pressure in the air tank is 110Kpa, in step 804, the correction time Δt is determined to be 0.06 seconds, and in step 809, 0.02 seconds may be taken as the adjusted correction time. If the correction time Δt is determined by a functional manner, the adjustment amplitude of the correction time Δt can be reduced by decreasing the above-described constant.
In the present embodiment, the second threshold is 8%, for example, but the present embodiment is not limited to this, and the second threshold may be another value depending on the experimental data, clinical data, or the type of the supplied air.
According to the embodiment, the opening time of the air supply electromagnetic valve is controlled based on the gas concentration or the gas concentration and the air pressure in the air storage tank, so that the gas concentration and the gas flow can be ensured to meet the use requirements of users.
Example 2
The present embodiment provides a supply gas concentration adjustment system. The system can be used in gas supply equipment, such as the oxygen generator, the atomizer and the like. The same contents of this embodiment as those of embodiment 1 will not be described again.
Fig. 9 is a schematic diagram of the supply gas concentration adjustment system 900 of the present embodiment. As shown in fig. 9, the system includes: a first sensor 901, a second sensor 902, and a controller 903.
The first sensor 901 is used to measure the breathing frequency of the user (steps 301, 401, 501, 601, 701, 801 described above); the second sensor 902 is used to measure the concentration of the gas at each gas supply cycle (the measurement of the gas concentration in the aforementioned steps 303, 503, and steps 603, 703, and 803); the controller 903 is configured to set an on time of the air supply solenoid valve in each air supply cycle (steps 302, 502, 602, 702, 802 described above) according to the respiratory rate, and adjust the on time according to the concentration of the air (steps 304, 505 described above) so that the concentration of the air is within a first range.
In this embodiment, the opening time of the gas supply solenoid valve is controlled based on the gas concentration, so that the gas concentration and the gas flow rate can be ensured to meet the use requirements of users.
In one embodiment, when the concentration of the gas is less than the first threshold, the controller 903 subtracts a first predetermined time from the on time to obtain an adjusted on time (step 505); when the concentration of the gas is not less than the first threshold value, the on-time is added to a second predetermined time to be the adjusted on-time (step 506).
In one embodiment, as shown in fig. 9, the supply gas concentration adjustment system 900 further includes:
A third sensor 904 that measures the air pressure in the air tank at each air supply cycle;
The controller 903 adjusts the on-time (steps 604, 706-707, 807-809 described above) based on the concentration of the gas and the gas pressure within the gas reservoir such that the concentration of the gas is within a first range and the flow of the gas is within a second range.
In one example, the controller 903 determines a correction time based on the gas pressure in the gas tank (step 704), subtracts the correction time from the on time and subtracts a first predetermined time from the on time as an adjusted on time when the concentration of the gas is less than a first threshold (step 706), and subtracts the correction time from the on time and subtracts a second predetermined time from the on time as an adjusted on time when the concentration of the gas is not less than the first threshold (step 707).
In another example, the controller 903 determines a correction time based on the gas pressure in the gas tank (step 804), and when the concentration of the gas is not less than a first threshold value, subtracts the correction time from the on time and adds a second predetermined time to the corrected on time (step 807), and when the concentration of the gas is less than the first threshold value and an absolute value of a difference between the concentration of the gas and the first threshold value is greater than the second threshold value (yes in step 806), subtracts the correction time from the on time and subtracts the first predetermined time to the corrected on time (step 808); when the concentration of the gas is smaller than a first threshold value and the absolute value of the difference between the concentration of the gas and the first threshold value is not larger than the second threshold value (no in step 806), the adjustment range of the correction time is reduced, and the on time minus the adjusted correction time is used as the adjusted on time (step 809).
In this embodiment, the controller 903 may compare the air pressure in the air tank with a preset air pressure and correction time comparison table; and determining the corresponding correction time according to the air pressure in the air storage tank. The correction time may be calculated according to the air pressure in the air tank and a preset correction time calculation formula. The specific implementation is as described in example 1, and the description thereof is omitted here.
According to the embodiment, the opening time of the air supply electromagnetic valve is controlled based on the gas concentration or the gas concentration and the air pressure in the air storage tank, so that the gas concentration or the gas concentration and the gas flow can be ensured to meet the use requirements of users.
Example 3
The present embodiment provides an air supply apparatus including the air supply concentration adjustment system described in embodiment 2, and since the air supply concentration adjustment system has been described in detail in embodiment 2, the content thereof is incorporated herein and will not be described again.
In the present embodiment, the gas supply device may be an oxygen generator or an atomizer, but the present embodiment is not limited thereto, and any gas supply device that supplies gas to a user to satisfy the user's needs is included in the scope of the present application.
Fig. 1 is an external schematic view of an oxygen generator according to the present embodiment, fig. 2 is a schematic view of one internal configuration of the oxygen generator according to the present embodiment, and fig. 10 is a schematic view of another internal configuration of the oxygen generator according to the present embodiment.
In this embodiment, as shown in fig. 1 and 2, the oxygenerator includes: the apparatus includes a cabinet housing 100, an oxygen outlet 200, a pressure regulating valve 300, a heat dissipating device 400, an integrated adsorption tower 500, a bacterial filter 600, and an oxygen supply system 700. In addition, as shown in fig. 10, the oxygenerator further includes: an oxygen tank pressure sensor 1001, a respiratory pressure fluctuation detection micro-pressure sensor 1002, an atmospheric pressure detection pressure sensor 1003, a three-way pipe 1004, an oxygen output control solenoid valve 1005, an intake port 1006, an intake muffler 1007, a compressor 1008, an oxygen concentration flow sensor 1009, a control processing system 1010, and an exhaust muffler 1011.
In this embodiment, the pressure regulating valve 300, the heat dissipating device 400, the integrated adsorption tower 500, and the bacterial filter 600 may be components of the oxygen supply system 700, and the oxygen supply system 700 may further include an air inlet 1006, a compressor 1008, an air intake silencer 1007, an oxygen concentration flow sensor 1009, an exhaust silencer 1011, and an oxygen storage tank pressure sensor 1001 shown in fig. 10, in addition to the components described above, and the oxygen supply system 700 may further include not shown: an air inlet filter, a four-position two-way electromagnetic valve, an exhaust one-way valve and the like. The functions of the above-described constituent elements may be referred to in the related art, and the description thereof is omitted here. The oxygen concentration flow sensor 1009 may function as the second sensor 902 of embodiment 2, and the oxygen storage tank pressure sensor 1001 may function as the third sensor 904 of embodiment 2.
In this embodiment, the control processing system 1010 is used to control the operation of the various components of the oxygenerator. For example, it may function as the controller 903 of embodiment 2.
In the present embodiment, the oxygen generator may further include a breath detection system, not shown, which may include a three-way pipe 1004 connecting the oxygen supply system 700 and the oxygen outlet 200, a breath pressure fluctuation detection micropressure sensor 1002, an atmospheric pressure detection pressure sensor 1003, and an oxygen output control electronic valve 1005. The respiratory pressure fluctuation detection micro-pressure sensor 1002 may function as the first sensor 901 of embodiment 2, and the oxygen output control electronic valve 1005 may function as the air supply solenoid valve of embodiments 1 and 2.
In this embodiment, the supply gas concentration adjustment method of embodiment 1 of the present invention may be applied to the oxygenerator, that is, the oxygenerator may include the supply gas concentration adjustment system of embodiment 2 of the present invention.
Through the air supply equipment of this embodiment, based on the air concentration or the air pressure control air supply solenoid valve's in air concentration and the gas holder on-time, can guarantee that air concentration or air concentration and gas flow can satisfy user's user demand.
The embodiment of the present invention also provides a computer-readable program, wherein the program, when executed in an air supply device, causes a computer to execute the method described in embodiment 1 in the air supply device.
The embodiment of the present invention also provides a storage medium storing a computer-readable program, wherein the computer-readable program causes a computer to execute the method described in embodiment 1 in an air supply device.
The above method/system of the present invention may be implemented by hardware, or may be implemented by hardware in combination with software. The present invention relates to a computer readable program which, when executed by a logic means, enables the logic means to carry out the apparatus or constituent means described above, or enables the logic means to carry out the various methods or steps described above. Logic such as field programmable logic, microprocessors, processors used in computers, and the like. The present invention also relates to a storage medium such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like for storing the above program.
The methods/systems described in connection with embodiments of the present invention may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. For example, one or more of the functional blocks shown in FIG. 9 and/or one or more combinations of the functional blocks may correspond to individual software modules or individual hardware modules of a computer program flow. These software modules may correspond to the individual steps shown in fig. 3, 5-8, respectively. These hardware modules may be implemented, for example, by solidifying the software modules using a Field Programmable Gate Array (FPGA).
A software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. A storage medium may be coupled to the processor such that the processor can read information from, and write information to, the storage medium; or the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. The software modules may be stored in the memory of the device or in a memory card that is insertable into the device. For example, if the apparatus employs a MEGA-SIM card of a large capacity or a flash memory device of a large capacity, the software module may be stored in the MEGA-SIM card or the flash memory device of a large capacity.
One or more of the functional blocks described in the figures and/or one or more combinations of functional blocks may be implemented as a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any suitable combination thereof for use in performing the functions described herein. One or more of the functional blocks described with respect to the figures and/or one or more combinations of functional blocks may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP communication, or any other such configuration.
While the application has been described in connection with specific embodiments, it will be apparent to those skilled in the art that the description is intended to be illustrative and not limiting in scope. Various modifications and alterations of this application will occur to those skilled in the art in light of the principles of this application, and such modifications and alterations are also within the scope of this application.
Claims (13)
1. A method of regulating a supply gas concentration, the method comprising:
Obtaining a breathing frequency of a user;
Setting the opening time of the air supply electromagnetic valve in each air supply period according to the breathing frequency of the user;
Measuring the concentration of the gas at each gas supply cycle;
the opening time of the next gas supply period is adjusted according to the concentration of the gas in the current gas supply period, so that the concentration of the gas is in a first range,
Judging whether the concentration of the gas is smaller than a first threshold value;
If yes, subtracting a first preset time from the opening time to serve as an adjusted opening time;
And if not, adding the second preset time to the opening time to be used as the adjusted opening time.
2. The method of claim 1, wherein the method further comprises:
measuring the air pressure of the air storage tank in each air supply period;
And adjusting the opening time of the next gas supply period according to the concentration of the gas in the current gas supply period and the gas pressure in the gas storage tank so that the concentration of the gas is in a first range and the flow rate of the gas is in a second range.
3. The method of claim 2, wherein adjusting the on time of a next supply cycle based on the concentration of the gas for a current supply cycle and the gas pressure within the gas reservoir comprises:
Determining correction time according to the air pressure in the air storage tank;
Judging whether the concentration of the gas is smaller than a first threshold value;
If yes, subtracting the correction time from the opening time and subtracting a first preset time from the correction time to obtain an adjusted time;
If not, subtracting the correction time from the on time and adding a second preset time to the on time to be used as the adjusted time.
4. The method of claim 2, wherein adjusting the on time of a next supply cycle based on the concentration of the gas for a current supply cycle and the gas pressure within the gas reservoir comprises:
Determining correction time according to the air pressure in the air storage tank;
Judging whether the concentration of the gas is smaller than a first threshold value;
if not, subtracting the correction time from the opening time and adding a second preset time to the correction time to be used as the adjusted time;
if so, judging whether the absolute value of the difference between the concentration of the gas and the first threshold is larger than a second threshold;
If yes, subtracting the correction time from the opening time and subtracting a first preset time from the correction time to obtain an adjusted opening time;
if not, reducing the adjustment amplitude of the correction time, and subtracting the adjusted correction time from the opening time to obtain the adjusted opening time.
5. The method of claim 3 or 4, wherein determining a correction time based on the air pressure within the air reservoir comprises:
Comparing the air pressure in the air storage tank with a preset comparison table of air pressure and correction time;
and determining the corresponding correction time according to the air pressure in the air storage tank.
6. The method of claim 3 or 4, wherein determining a correction time based on the air pressure within the air reservoir comprises:
and calculating the correction time according to the air pressure in the air storage tank and a preset correction time calculation formula.
7. A gas supply concentration adjustment system, characterized in that the gas supply concentration adjustment system comprises:
A first sensor that measures a respiratory rate of a user;
a second sensor that measures a concentration of gas at each gas supply cycle;
a controller which sets the opening time of the air supply solenoid valve in each air supply period according to the respiratory frequency, adjusts the opening time of the next air supply period according to the concentration of the air in the current air supply period so that the concentration of the air is in a first range,
The controller subtracts a first predetermined time from the on-time to be an adjusted on-time when the concentration of the gas is less than a first threshold, and adds a second predetermined time to be the adjusted on-time when the concentration of the gas is not less than the first threshold.
8. The feed gas concentration adjustment system of claim 7, wherein the feed gas concentration adjustment system further comprises:
a third sensor for measuring the air pressure in the air tank at each air supply cycle;
the controller adjusts the on time of the next gas supply cycle according to the concentration of the gas in the current gas supply cycle and the gas pressure in the gas storage tank so that the concentration of the gas is in a first range and the flow rate of the gas is in a second range.
9. The supply gas concentration adjustment system according to claim 8, wherein the controller determines a correction time based on the gas pressure in the gas tank, subtracts the correction time from the on time and subtracts a first predetermined time from the on time as an adjusted on time when the concentration of the gas is less than a first threshold, and subtracts the correction time from the on time and adds a second predetermined time from the on time as an adjusted on time when the concentration of the gas is not less than the first threshold.
10. The supply gas concentration adjustment system according to claim 8, wherein the controller determines a correction time from the gas pressure in the gas tank, subtracts the correction time from the on time plus a second predetermined time as an adjusted on time when the concentration of the gas is not less than a first threshold, and subtracts the correction time from the on time plus the first predetermined time as an adjusted on time when the concentration of the gas is less than the first threshold and an absolute value of a difference between the concentration of the gas and the first threshold is greater than a second threshold; and when the concentration of the gas is smaller than the first threshold value and the absolute value of the difference between the concentration of the gas and the first threshold value is not larger than the second threshold value, reducing the adjustment amplitude of the correction time, and subtracting the adjusted correction time from the on time to obtain the adjusted on time.
11. The supply gas concentration adjustment system according to claim 9 or 10, wherein the controller compares the gas pressure in the gas tank with a preset gas pressure versus correction time table; and determining the corresponding correction time according to the air pressure in the air storage tank.
12. The supply gas concentration adjustment system according to claim 9 or 10, wherein the controller calculates the correction time based on the air pressure in the air tank and a preset correction time calculation formula.
13. An oxygenerator, wherein the oxygenerator comprises the feed gas concentration adjustment system of any one of claims 7-12.
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