CN111569199B - Dry burning prevention method and device for atomizer, atomizer and storage medium - Google Patents
Dry burning prevention method and device for atomizer, atomizer and storage medium Download PDFInfo
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- CN111569199B CN111569199B CN202010331925.XA CN202010331925A CN111569199B CN 111569199 B CN111569199 B CN 111569199B CN 202010331925 A CN202010331925 A CN 202010331925A CN 111569199 B CN111569199 B CN 111569199B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M11/00—Sprayers or atomisers specially adapted for therapeutic purposes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/33—Controlling, regulating or measuring
- A61M2205/3327—Measuring
Abstract
The application relates to a dry burning prevention method and device for a nebulizer, the nebulizer and a storage medium. The method comprises the following steps: judging whether dry combustion occurs in the frequency sweeping stage; if the dry combustion is judged not to occur, determining the resonant frequency; outputting a driving signal according to the resonant frequency; the driving signal is used for indicating the driving circuit to drive the atomizing sheet to atomize according to the resonance frequency; acquiring a real-time current value of an atomization sheet; and if the dry burning is judged to occur according to the real-time current value, executing the dry burning protection. The method is adopted to judge whether dry combustion occurs in the frequency sweeping stage of determining the resonant frequency of the atomizer, if no dry combustion occurs, the resonant frequency of the atomizing sheet is determined, the driving circuit is instructed to drive the atomizing sheet to perform atomization work according to the output driving signal of the resonant frequency, the real-time current value of the atomizing sheet is obtained in the atomization work stage, whether the atomizer is dry-burned is judged according to the real-time current value of the atomizing sheet, and dry combustion detection in the complete work stage of the atomizer can be realized without additional hardware, so that the method is simple, effective and convenient to realize.
Description
Technical Field
The application relates to the technical field of atomization, in particular to an anti-dry heating method and device for an atomizer, the atomizer and a storage medium.
Background
Along with the development of medical technology, aerosol inhalation treatment appears, and is commonly used for treating respiratory diseases, the liquid medicine is atomized into tiny particles by adopting an atomizer, and a patient inhales the atomized medicine into respiratory tract and lung deposition by breathing, so that the medicine can directly reach focus, the medicine effect is accelerated, and the painless, rapid and effective treatment purpose is achieved.
Dry combustion is the most common problem of nebulizers during use, and dry combustion of nebulizers occurs in a state of lack of medical fluid. In order to prevent dry combustion, the existing atomizer generally adopts an electrode to detect whether the liquid medicine is absent or not, the electrode is communicated with the negative electrode of the atomizing sheet through the liquid medicine, and whether the atomizer is absent or not is judged through the electrical change of the detection electrode. However, the electrode needs to be additionally arranged, a hardware circuit in the atomizer needs to be changed, and the dry combustion method is used for detecting the dry combustion, and is affected by the conditions of the atomizer structure, materials, the hardware circuit and the like, so that the use scene is limited.
Disclosure of Invention
In view of the above, it is necessary to provide a method, an apparatus, an atomizer, and a storage medium for preventing dry combustion of an atomizer, which are capable of effectively detecting dry combustion and which are simple to implement.
An atomizer dry burning prevention method, comprising:
judging whether dry combustion occurs in the frequency sweeping stage;
if the dry combustion is judged not to occur, determining the resonance frequency of the atomizing sheet;
outputting a driving signal according to the resonant frequency; the driving signal is used for indicating the driving circuit to drive the atomizing sheet to atomize according to the resonance frequency;
acquiring a real-time current value of an atomization sheet;
and if the dry burning is judged to occur according to the real-time current value, executing the dry burning protection.
In one embodiment, the step of performing dry-fire protection if it is determined that dry-fire occurs according to the real-time current value includes:
judging whether the real-time current value falls into a dry combustion protection interval or not;
if not, executing dry combustion protection.
In one embodiment, the real-time current value includes a plurality of current values obtained according to a preset time; the step of executing the dry combustion protection if the dry combustion is judged to occur according to the real-time current value comprises the following steps:
judging whether each real-time current value does not fall into a dry combustion protection interval;
if yes, dry-fire protection is executed.
In one embodiment, before the step of obtaining the real-time current value of the atomizing sheet is performed, the method further includes:
and establishing a dry combustion protection interval.
In one embodiment, the step of establishing the dry-fire protection interval includes:
Acquiring a preset number of atomizing sheet current sampling values;
and determining a dry-burning protection interval according to the average value of the current sampling values.
In one embodiment, the step of determining the dry-fire protection interval according to the average value of the current sampling values includes:
removing the highest value and the lowest value of the preset number from the preset number of current sampling values;
calculating a current average value according to the residual current sampling value;
calculating an upper limit value and a lower limit value of the dry combustion protection interval; the upper limit value is obtained by floating a current average value by a first preset proportion; the lower limit value is obtained by floating the current average value downwards by a second preset proportion.
In one embodiment, the step of establishing the dry-fire protection interval is performed according to a preset period.
In one embodiment, the step of determining whether dry combustion occurs during the sweep stage includes:
acquiring an actual sweep frequency curve of an atomization sheet in a sweep frequency stage; the actual sweep frequency curve is data reflecting the current change when the atomizing sheet works in a preset frequency range;
carrying out matching judgment on the actual sweep frequency curve according to the preset sweep frequency curve; the preset sweep frequency curve is a logic curve model of current change when the atomizing sheet works in a preset frequency range;
and if the judgment result shows that the two images do not match, executing dry combustion protection.
In one embodiment, the step of performing matching judgment on the actual sweep frequency curve according to the preset sweep frequency curve includes:
determining a first current value according to an actual sweep frequency curve; the first current value is a current value corresponding to a first frequency in a preset frequency range;
determining a first preset value according to a current value corresponding to a first frequency in a preset sweep frequency curve;
comparing the first current value with a first predetermined value;
if the first current value is greater than a first predetermined value, a mismatch is determined.
In one embodiment, the step of performing matching judgment on the actual sweep frequency curve according to the preset sweep frequency curve further includes:
if the first current value is smaller than or equal to a first preset value, determining an actual maximum current value; the actual maximum current value is the maximum current value in the actual sweep frequency curve;
determining a second preset value according to the maximum current value in the preset sweep frequency curve;
comparing the actual maximum current value with a second predetermined value;
and if the actual maximum current value is greater than the second preset value, judging that the maximum current value is not matched.
In one embodiment, the step of performing matching judgment on the actual sweep frequency curve according to the preset sweep frequency curve further includes:
if the first current value is smaller than or equal to a first preset value, determining a second frequency; the second frequency is the frequency corresponding to the maximum current value in the actual sweep frequency curve;
Calculating a difference between the second frequency and the reference frequency; the reference frequency is the frequency corresponding to the maximum current value in the preset sweep frequency curve;
if the difference between the second frequency and the reference frequency is larger than a preset third preset value, the judgment is that the two frequencies are not matched.
In one embodiment, the step of performing matching judgment on the actual sweep frequency curve according to the preset sweep frequency curve further includes:
if the first current value is smaller than or equal to a first preset value, determining an actual maximum current value and a second frequency; the actual maximum current value is the maximum current value in the actual sweep frequency curve; the second frequency is the frequency corresponding to the maximum current value in the actual sweep frequency curve;
determining a second preset value according to the maximum current value in the preset sweep frequency curve;
if the actual maximum current value is larger than a second preset value and the difference value between the second frequency and the reference frequency is larger than a preset third preset value, the actual maximum current value is not matched;
the reference frequency is the frequency corresponding to the maximum current value in the preset sweep frequency curve.
An atomizer anti-dry combustion device, the device comprising:
the sweep frequency dry combustion judging module is used for judging whether dry combustion occurs in a sweep frequency stage;
the resonance frequency determining module is used for determining the resonance frequency of the atomizing sheet when the dry burning is judged not to occur;
The driving signal output module is used for outputting a driving signal according to the resonance frequency; the driving signal is used for indicating the driving circuit to drive the atomizing sheet to atomize according to the resonance frequency;
the real-time current acquisition module is used for acquiring the real-time current value of the atomizing sheet;
and the dry-burning protection module is used for executing dry-burning protection when the dry burning is judged to occur according to the real-time current value.
A nebulizer comprising a memory storing a computer program and a processor implementing the steps of the method described above when the processor executes the computer program.
A computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of the above method.
According to the dry combustion method, the device, the atomizer and the storage medium for preventing the atomizer, in the frequency sweeping stage of determining the resonant frequency of the atomizer, whether dry combustion occurs is judged, if dry combustion does not occur, the resonant frequency of the atomizing sheet is determined, the driving circuit is instructed to drive the atomizing sheet to perform atomization work according to the output driving signal of the resonant frequency, the real-time current value of the atomizing sheet is obtained in the atomization work stage, whether the atomizer is dry combustion is judged according to the real-time current value of the atomizing sheet, and dry combustion detection in the complete work stage of the atomizer can be achieved without adding additional hardware, so that the dry combustion detection is simple, effective and convenient to achieve.
Drawings
FIG. 1 is an application environment diagram of an atomizer anti-dry combustion method in one embodiment;
FIG. 2 is a schematic flow chart of a method for preventing dry combustion in an atomizer according to one embodiment;
FIG. 3 is a schematic flow chart of a method for preventing dry combustion in an atomizer according to one embodiment;
FIG. 4 is a schematic flow chart of a method for preventing dry combustion of an atomizer according to one embodiment;
FIG. 5 is a schematic flow chart of a method for preventing dry combustion of an atomizer in one embodiment;
FIG. 6 is a flowchart illustrating a step of establishing a dry-fire protection interval according to one embodiment;
FIG. 7 is a flowchart illustrating a step of determining a dry-fire protection interval according to an average value of current sampling values in one embodiment;
FIG. 8 is a schematic flow chart of a method for preventing dry combustion of an atomizer in one embodiment;
FIG. 9 is a flowchart of a step of performing matching judgment on an actual sweep frequency curve according to a preset sweep frequency curve in one embodiment;
FIG. 10 is a flowchart illustrating a step of performing matching judgment on an actual sweep-frequency curve according to a preset sweep-frequency curve in one embodiment;
FIG. 11 is a flowchart illustrating a step of performing matching judgment on an actual sweep-frequency curve according to a preset sweep-frequency curve in one embodiment;
FIG. 12 is a flowchart of a step of performing a matching judgment on an actual sweep frequency curve according to a preset sweep frequency curve in one embodiment;
FIG. 13 is a block diagram of an atomizer anti-dry combustion device according to one embodiment;
FIG. 14 is an internal structural view of the atomizer in one embodiment;
FIG. 15 is a schematic diagram of a preset sweep curve in one embodiment.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
As shown in fig. 1, in order to realize the atomization control, the atomizer generally includes a controller 110, an atomization sheet 130, a current detection circuit 140, and a driving circuit 120; the controller 110 is configured to output a PWM driving signal to control the driving circuit 120 to drive the atomizing sheet 130 to operate, the atomizing sheet 130 atomizes the liquid medicine under the driving of the driving circuit 120, and the current detecting circuit 140 is configured to detect a current flowing through the atomizing sheet 130 and feed back the current to the controller 110, so that the controller 110 can regulate and control the PWM driving signal according to the fed-back current. It will be appreciated by those skilled in the art that fig. 1 shows only the major components for implementing the atomization control, and that further components may be included according to the functional needs of the atomizer, and that fig. 1 is merely for reference in order to facilitate understanding of the atomizer anti-dry combustion method in the embodiments described below, and is not intended to limit the atomizer composition for practicing the method.
In one embodiment, as shown in fig. 2, there is provided a method for preventing dry combustion of an atomizer, which is illustrated by taking a controller of the atomizer as an example, and includes the following steps:
step S100, judging whether dry combustion occurs in the frequency sweeping stage.
The frequency sweep stage is a pre-working stage for acquiring the resonant frequency of the atomizing sheet, the atomizing sheet is controlled to work at different frequencies according to a preset frequency range, the resonant frequency of the atomizing sheet is determined, and the maximum atomizing amount can be acquired when the atomizing sheet works at the resonant frequency.
Because the current flowing through the atomizing sheet will change in the dry-burning and non-dry-burning states, in one embodiment, whether dry-burning occurs can be determined by comparing the actual sweep frequency curve with the preset sweep frequency curve. The preset sweep frequency curve is a logic curve model of the change of the current value flowing through the atomizing sheet when the atomizing sheet works at different frequencies within a preset frequency range in a normal working state without dry combustion. The logic curve model is a model for predicting the curve change trend, and comprises judgment and identification of logic and data of curve characteristics, and the general outline of the curve can be obtained through the characteristics. The actual sweep frequency curve is a curve reflecting the change condition of the current value flowing through the atomizing sheet when the atomizing sheet works at different frequencies within a preset frequency range.
In one embodiment, the preset sweep profile may be established using a starting point, an ascending trend, and a descending trend. Referring to fig. 15, fig. 15 is a schematic diagram of a preset scan curve. As shown in fig. 15, the current value of the start point a is I 1 The upward trend refers to a trend curve formed from a to B, and the downward trend is a trend curve formed from B to C. According to the rising trendAnd the inflection point formed by the descending trend can determine the maximum current value I 3 Wherein the current value I 1 Current value I 3 It has an upper limit and a lower limit, as measured. That is, the preset scan curve is a set of curves having the same profile, which is not a fixed curve.
In step S200, if it is determined that dry combustion does not occur, the resonance frequency of the atomizing sheet is determined.
At the resonance frequency, the atomizing sheet can generate the largest amount of atomization, and the current in the circuit at resonance is the largest as known from the resonance characteristic. The resonant frequency can be determined by detecting the maximum current value of the atomizing sheet in a preset frequency range. In one embodiment, when dry combustion does not occur, that is, the atomizing sheet works in a normal state, at this time, the frequency corresponding to the maximum current value in the actual sweep frequency curve is the resonant frequency, and the maximum atomization amount can be obtained by controlling the atomizing sheet to work at the frequency.
Step S300, outputting a driving signal according to the resonance frequency; the driving signal is used for indicating the driving circuit to drive the atomizing sheet to atomize according to the resonance frequency.
The driving signal is a PWM driving signal corresponding to the resonant frequency, and the driving circuit is controlled to drive the atomizing sheet to work at the resonant frequency so as to generate the maximum atomization amount.
Step S400, obtaining a real-time current value of the atomizing sheet.
The real-time current value of the atomizing sheet is the current value of the atomizing sheet, and the controller acquires the current value of the atomizing sheet fed back by the current detection circuit as the real-time current value of the atomizing sheet.
Step S500, judging whether dry burning occurs or not according to the real-time current value;
in step S600, if it is determined that dry burning occurs, dry burning protection is performed.
The atomizing sheet works at the resonance frequency, namely the frequency is unchanged, and the current value flowing through the atomizing sheet is different in a dry burning state and a non-dry burning state, so that whether dry burning occurs can be judged according to the real-time current value, and if the dry burning occurs, the controller executes the dry burning protection.
In one embodiment, the dry combustion protection may be performed by stopping outputting the driving signal to the driving circuit, i.e. controlling the atomizing sheet to stop atomizing.
In one embodiment, performing dry burn protection generates a prompt signal for the controller to prompt the user that dry burn is occurring with the atomizer.
According to the dry combustion method for the atomizer, in the sweep frequency stage of determining the resonant frequency of the atomizer, whether dry combustion occurs is judged, if dry combustion does not occur, the resonant frequency of the atomizing sheet is determined, the driving circuit is instructed to drive the atomizing sheet to perform atomization according to the output driving signal of the resonant frequency, the real-time current value of the atomizing sheet is obtained in the atomization working stage, whether dry combustion of the atomizer occurs is judged according to the real-time current value of the atomizing sheet, and dry combustion detection in the complete working stage of the atomizer can be achieved without additional hardware, so that the dry combustion method is simple, effective and convenient to achieve.
In one embodiment, as shown in fig. 3, the step of performing dry-fire protection if it is determined that dry-fire occurs according to the real-time current value includes:
step S510, judging whether the real-time current value falls into the dry combustion protection interval.
The dry-burning protection interval is a range interval of current values of the atomizing sheet flowing through the atomizing sheet in a non-dry-burning state.
If the real-time current value does not fall within the dry combustion protection interval, step S600 is performed.
If the current value flowing through the atomizing sheet falls into the dry burning protection interval, dry burning does not occur; if the dry burning protection zone does not fall, dry burning occurs, and the controller executes the dry burning protection.
If the real-time current value falls within the dry-fire protection interval, the process returns to step S400.
In one embodiment, as shown in fig. 4, the real-time current value includes a plurality of current values obtained according to a preset time, and the step of performing dry-fire protection if it is determined that dry-fire occurs according to the real-time current value includes:
if whether dry burning occurs is judged only according to whether a single real-time current value falls into a dry burning protection interval, judging errors can occur, and the dry burning protection is triggered by errors. In order to improve the accuracy of dry combustion method detection, a plurality of real-time current values are obtained according to preset time to judge. The preset time is a preset time range, for example, two or more real-time current values within 0.2S are acquired, and in one embodiment, the adjacent two acquisition time intervals may be equal or unequal.
Step S520, determining whether each real-time current value does not fall within the dry-fire protection interval.
If the real-time current values acquired in the preset time do not fall into the dry-heating protection interval, the dry-heating of the atomizer can be determined. In one embodiment, if only the real-time current values not exceeding the preset proportion number fall into the dry-heating protection zone among the plurality of collected real-time current values, and the rest do not fall into the dry-heating protection zone, the atomizer is considered to generate dry-heating.
If yes, go to step S600.
After determining that the atomizer is dry-burned, the controller performs dry-burning protection.
In one embodiment, as shown in fig. 5, before the step of obtaining the real-time current value of the atomizing sheet is performed, the method further includes:
step S700, a dry combustion protection interval is established.
The dry combustion protection interval may be different under the conditions of different atomizing sheets, different working frequencies, different atomized liquid capacities, etc., so that the dry combustion protection interval needs to be established in the current working state. In one embodiment, the detection may also be performed using a preset dry-fire protection interval.
In one embodiment, as shown in fig. 6, the step of establishing the dry-fire protection interval includes:
step S710, obtaining a preset number of sampling values of the current of the atomizing sheets.
And acquiring a preset number of current sampling values fed back by the current detection circuit, and establishing a dry-heating protection interval capable of reflecting the current interval range of the atomizing sheet of the current atomizer during normal operation. In one embodiment, after the resonant frequency of the atomizer is determined through the frequency sweep stage, the atomizing sheet is controlled to work normally at the resonant frequency, and a preset number of current sampling values are obtained, for example, 100 current sampling values of the atomizing sheet can be obtained, and a dry-fire protection interval is established according to the 100 current sampling values. After each sweep of the atomizer, the current sampling value is acquired again to establish a dry-burning protection zone, so that the dry-burning protection zone can correspond to the current normal working state, and the accuracy of dry-burning detection is improved. In one embodiment, to ensure that the resonant frequency matches the current operating state of the atomizer, the frequency sweep is re-performed before each start-up or start-up of the atomizer to determine the resonant frequency.
Step S720, determining a dry-fire protection interval according to the average value of the current sampling values.
The obtained current sampling value is the current value of the atomizing sheet under the condition of non-dry combustion, and the current value possibly has certain fluctuation in the actual working process, so that the reliability of the dry combustion protection interval can be improved by calculating the average value of the current sampling value to determine the dry combustion protection interval, and the influence of the current fluctuation on the detection accuracy is reduced.
In one embodiment, as shown in fig. 7, the step of determining the dry-fire protection interval according to the average value of the current sampling value includes:
in step S721, the highest value and the lowest value of the preset number are removed from the preset number of current sampling values.
The influence of data under extreme conditions on the objectivity of the dry combustion protection zone can be eliminated by removing the highest value and the lowest value of the preset number, and the detection accuracy is improved. For example, 100 current sampling values, the highest 1 or several highest values may be sequentially removed and the lowest 1 or several lowest values may be sequentially removed according to the order of the sizes.
In step S722, a current average value is calculated from the remaining current sampling values.
And averaging the current sampling values which are remained after the highest value and the lowest value of the preset number are removed to obtain a current average value. For example, for 100 current sample values, after removing 1 maximum value and 1 minimum value, the remaining 98 current sample values are averaged.
Step S723, calculating an upper limit value and a lower limit value of a dry combustion protection zone; the upper limit value is obtained by floating a current average value by a first preset proportion; the lower limit value is obtained by floating the current average value downwards by a second preset proportion.
If the dry combustion method is only used for detecting the current average value, the condition that current fluctuation is generated due to various reasons in the working process cannot be covered, so that the detection accuracy is low, and therefore the current average value is subjected to floating up and floating down calculation according to the first preset proportion and the second preset proportion, a section is determined for dry combustion method detection, and the detection accuracy is improved.
In one embodiment, the step of establishing the dry-fire protection interval is performed according to a preset period.
Because some working parameters may change along with working time in the working process of the atomizer, and a plurality of burning protection intervals are fixed, whether dry burning occurs in the complete working process of the atomizer cannot be accurately detected. Therefore, the step of establishing the dry combustion protection interval can be repeatedly executed according to the preset period, and the accuracy of dry combustion detection is further improved.
In one embodiment, as shown in fig. 8, the step of determining whether dry combustion occurs in the sweep stage includes:
Step S110, obtaining an actual sweep frequency curve of an atomization sheet in a sweep frequency stage; the actual sweep frequency curve is data reflecting current change when the atomizing sheet works in a preset frequency range.
The actual sweep frequency curve is a current value of the atomizing sheet flowing through the atomizing sheet when the atomizing sheet works at different frequencies within a preset frequency range. In one embodiment, the predetermined frequency range is typically a frequency range (e.g., ±3 KHz) centered around the natural frequency of the atomizer plate (i.e., factory parameters, e.g., 100 to 160 KHz), for example, the predetermined frequency range may be 97KHz to 103KHz assuming the natural frequency of the atomizer plate is 100 KHz.
The frequency sweep stage controller outputs PWM driving signals corresponding to different frequencies to the driving circuit according to a preset frequency range, so that the driving circuit drives the atomizing sheet to atomize, and current values flowing through the atomizing sheet under the driving of different PWM driving signals are obtained to form an actual frequency sweep curve.
And step S120, carrying out matching judgment on the actual sweep frequency curve according to the preset sweep frequency curve.
Because the current flowing through the atomizing sheet can change in the dry heating and non-dry heating states, whether the dry heating occurs can be judged by comparing the actual sweep frequency curve with the preset sweep frequency curve. Specifically, whether the atomizer generates dry burning or not can be determined by performing matching judgment. In one embodiment, the matching determination is to determine whether the actual sweep frequency curve is the same as the preset sweep frequency curve. In one embodiment, the matching determination may be determining a matching range according to a preset sweep frequency curve, and determining that the actual sweep frequency curve is matched when the actual sweep frequency curve is within a matching range of a certain proportion of the preset sweep frequency curve that floats up or down.
If it is determined that the two images do not match, step S600 is performed.
If the detection result is not matched with the detection result, the dry burning protection can be executed in the frequency sweeping stage, the dry burning is prevented from being detected when the detection result enters the formal working stage, and the reliability of the dry burning protection is improved.
In one embodiment, as shown in fig. 9, the step of performing matching judgment on the actual sweep frequency curve according to the preset sweep frequency curve includes:
step S121, determining a first current value according to an actual sweep frequency curve; the first current value is a current value corresponding to a first frequency in a preset frequency range.
The first frequency is the initial frequency in the preset frequency range, and the first current value corresponding to the first frequency is the initial current value of the atomizing sheet in the frequency sweeping stage.
Step S122, a first preset value is determined according to a current value corresponding to a first frequency in a preset sweep frequency curve.
And determining a current value corresponding to the first frequency in a preset sweep frequency curve, and determining a first preset value according to the current value, wherein the first preset value is used for comparing with the first current value so as to judge whether the atomizer generates dry burning or not. In one embodiment, the first predetermined value is a current value corresponding to a first frequency in a preset sweep frequency curve. In one embodiment, the first preset value is a value obtained after the current value corresponding to the first frequency in the preset sweep frequency curve floats upwards or floats downwards by a preset proportion, so that the condition of current fluctuation in the working process is fully considered, and the detection accuracy is improved. For example, let the current value be I 1 The preset proportion is 10%, the first preset value is I 1 (1.+ -. 10%). It is emphasized that since the preset sweep curve is a set of curves having the same profile, the first predetermined value is not a determined value, but a range of values having an upper limit value and a lower limit value.
Step S123, comparing the first current value with a first predetermined value.
Comparing the first current value with a first preset value, and judging that the first current value is matched if the first current value is smaller than or equal to the first preset value.
In step S124, if the first current value is greater than the first predetermined value, it is determined that the first current value is not matched.
In this embodiment, the first current value corresponding to the first frequency is compared with the first predetermined value determined according to the current value corresponding to the first frequency, so as to determine whether the actual sweep frequency curve is matched with the preset sweep frequency curve, and determine according to the initial stage parameters of the sweep frequency stage, if the actual sweep frequency curve is not matched, the atomizer is started and is in a liquid shortage state.
In one embodiment, as shown in fig. 10, the step of performing matching judgment on the actual sweep frequency curve according to the preset sweep frequency curve further includes:
step S125, if the first current value is smaller than or equal to the first preset value, determining an actual maximum current value; the actual maximum current value is the maximum current value in the actual sweep curve.
When the first current value is less than or equal to the first predetermined value, in order to ensure the accuracy of detection, further matching judgment needs to be performed, and the actual maximum current value is determined for performing the matching judgment.
Step S126, determining a second preset value according to the maximum current value in the preset sweep frequency curve.
Determining a maximum current value in a preset sweep frequency curve, and determining a second preset according to the maximum current valueThe fixed value and the second preset value are used for comparing with the actual maximum current value so as to judge whether the atomizer generates dry burning or not. In one embodiment, the second predetermined value is a maximum current value in the preset sweep frequency curve. In one embodiment, the second preset value is a value obtained after the maximum current value in the preset sweep frequency curve floats upwards or floats downwards by a preset proportion, the condition of current fluctuation in the working process is fully considered, and the detection accuracy is improved. For example, let the current value be I 3 The preset proportion is 10%, the second preset value is I 3 (1.+ -. 10%). It is emphasized that since the preset sweep curve is a set of curves having the same profile, the second predetermined value is not a determined value, but a range value having an upper limit value and a lower limit value. Step S127, comparing the actual maximum current value with a second predetermined value.
Comparing the actual maximum current value with the second preset value, and judging that the actual maximum current value is matched if the actual maximum current value is smaller than or equal to the second preset value.
In step S128, if the actual maximum current value is greater than the second predetermined value, it is determined that the actual maximum current value is not matched.
When the first current value is smaller than or equal to a first preset value, matching judgment is further carried out by comparing the actual maximum current value with a second preset value, and when the actual maximum current value is larger than the second preset value, the fact that the actual sweep frequency curve is not matched with the preset sweep frequency curve is judged, and it is determined that the atomizer is in a liquid shortage state in the sweep frequency stage.
In one embodiment, as shown in fig. 11, the step of performing matching judgment on the actual sweep frequency curve according to the preset sweep frequency curve further includes:
step S129, if the first current value is smaller than or equal to a first preset value, determining a second frequency; the second frequency is the frequency corresponding to the maximum current value in the actual sweep frequency curve.
When the first current value is less than or equal to the first predetermined value, in order to ensure the accuracy of detection, further matching judgment needs to be performed, and the second frequency is determined for performing the matching judgment.
Step S130, calculating the difference between the second frequency and the reference frequency; the reference frequency is the frequency corresponding to the maximum current value in the preset sweep frequency curve.
And calculating a difference value between a second frequency corresponding to the maximum current value of the actual sweep frequency curve and a reference frequency corresponding to the maximum current value of the preset sweep frequency curve, and judging whether the actual sweep frequency curve is matched with the preset sweep frequency curve according to the difference value.
Step S131, if the difference between the second frequency and the reference frequency is greater than a preset third predetermined value, it is determined that the first frequency and the reference frequency are not matched.
The third preset value is a preset value and is used for measuring whether the difference value between the second frequency and the reference frequency accords with the matching condition of the actual sweep frequency curve and the preset sweep frequency curve. And when the difference value between the second frequency and the reference frequency is larger than a third preset value, judging that the two frequencies are not matched, namely determining that the atomizer is out of liquid in the frequency sweeping stage.
In one embodiment, as shown in fig. 12, the step of performing matching judgment on the actual sweep frequency curve according to the preset sweep frequency curve further includes:
step S132, if the first current value is smaller than or equal to the first preset value, determining an actual maximum current value and a second frequency; the actual maximum current value is the maximum current value in the actual sweep frequency curve; the second frequency is the frequency corresponding to the maximum current value in the actual sweep frequency curve.
And matching judgment is carried out by combining the actual maximum current value and the second frequency, so that the accuracy of judgment is improved.
Step S133, determining a second preset value according to the maximum current value in the preset sweep frequency curve.
And determining a maximum current value in a preset sweep frequency curve, and determining a second preset value according to the current value, wherein the second preset value is used for comparing with an actual maximum current value so as to judge whether the atomizer generates dry burning or not. In one embodiment, the second predetermined value is a maximum current value in the preset sweep frequency curve. In one embodiment, the second preset value is a value obtained after the maximum current value in the preset sweep frequency curve floats upwards or floats downwards by a preset proportion, the condition of current fluctuation in the working process is fully considered, and the detection accuracy is improved.
Step S134, if the actual maximum current value is greater than a second preset value and the difference between the second frequency and the reference frequency is greater than a preset third preset value, determining that the two frequencies are not matched; the reference frequency is the frequency corresponding to the maximum current value in the preset sweep frequency curve.
When the first current value is smaller than or equal to the first preset value, matching judgment is further carried out by comparing the actual maximum current value with the second preset value and judging whether the difference value between the second frequency and the reference frequency is larger than the third preset value, when the actual maximum current value is larger than the second preset value and the difference value between the second frequency and the reference frequency is larger than the preset third preset value, the fact that the actual sweep frequency curve is not matched with the preset sweep frequency curve is judged, and it is determined that the atomizer is in a liquid shortage state in the sweep frequency stage.
It should be understood that, although the steps in the flowcharts of fig. 2-12 are shown in order as indicated by the arrows, these steps are not necessarily performed in order as indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in FIGS. 2-12 may include multiple steps or stages that are not necessarily performed at the same time, but may be performed at different times, nor do the order in which the steps or stages are performed necessarily performed in sequence, but may be performed alternately or alternately with at least a portion of the steps or stages in other steps or other steps.
In one embodiment, as shown in fig. 13, there is provided an atomizer anti-dry combustion device 200 comprising:
the sweep frequency dry combustion judgment module 210 is configured to judge whether dry combustion occurs in the sweep frequency stage;
a resonant frequency determining module 220, configured to determine a resonant frequency when it is determined that dry combustion does not occur; the resonance frequency is the frequency corresponding to the maximum current value in the actual sweep frequency curve;
A driving signal output module 230 for outputting a driving signal according to the resonance frequency; the driving signal is used for indicating the driving circuit to drive the atomizing sheet to atomize according to the resonance frequency;
a real-time current obtaining module 240, configured to obtain a real-time current value of the atomizing sheet;
the dry-fire protection module 250 is configured to perform dry-fire protection when it is determined that dry-fire occurs according to the real-time current value.
In one embodiment, the sweep dry combustion method includes:
the dry-burning protection interval comparison module is used for judging whether the real-time current value falls into the dry-burning protection interval;
and the first protection module is used for executing the dry combustion protection when the real-time current value is judged not to fall into the dry combustion protection interval.
In one embodiment, the dry-fire protection module includes:
the first judging module is used for judging whether all the real-time current values do not fall into the dry combustion protection interval;
and the second protection module is used for executing the dry combustion protection when judging whether each real-time current value does not fall into the dry combustion protection interval.
In one embodiment, the atomizer anti-dry heating device further comprises:
and the dry-heating protection interval establishing module is used for establishing the dry-heating protection interval.
In one embodiment, the dry-fire protection interval establishment module includes:
The current sampling value acquisition module is used for acquiring a preset number of atomized sheet current sampling values;
and the dry-heating protection interval determining module is used for determining the dry-heating protection interval according to the average value of the current sampling values.
In one embodiment, the dry-fire protection interval determination module includes:
the data screening module is used for removing the highest value and the lowest value of the preset number from the preset number of current sampling values;
the current average value calculation module is used for calculating a current average value according to the residual current sampling value;
the upper and lower limit value calculation module is used for calculating the upper limit value and the lower limit value of the dry combustion protection zone; the upper limit value is obtained by floating a current average value by a first preset proportion; the lower limit value is obtained by floating the current average value downwards by a second preset proportion.
In one embodiment, the sweep dry combustion method includes:
the sweep frequency curve acquisition module is used for acquiring an actual sweep frequency curve of the atomizing sheet in the sweep frequency stage; the actual sweep frequency curve is data reflecting the current change when the atomizing sheet works in a preset frequency range;
the matching judgment module is used for carrying out matching judgment on the actual sweep frequency curve according to the preset sweep frequency curve; the preset sweep frequency curve is a logic curve model of current change when the atomizing sheet works in a preset frequency range;
And the third protection module is used for executing dry combustion protection when the preset sweep frequency curve is not matched with the actual sweep frequency curve.
In one embodiment, the matching judgment module includes:
the first current value determining module is used for determining a first current value according to an actual sweep frequency curve; the first current value is a current value corresponding to a first frequency in a preset frequency range;
the first preset value determining module is used for determining a first preset value according to a current value corresponding to a first frequency in a preset sweep frequency curve;
the first comparison module is used for comparing the first current value with a first preset value;
and the first judging module is used for judging that the preset sweep frequency curve is not matched with the actual sweep frequency curve when the first current value is larger than a first preset value.
In one embodiment, the matching judgment module further includes:
the maximum current determining module is used for determining an actual maximum current value when the first current value is smaller than or equal to a first preset value; the actual maximum current value is the maximum current value in the actual sweep frequency curve;
the second preset value determining module is used for determining a second preset value according to the maximum current value in the preset sweep frequency curve;
the second comparison module is used for comparing the actual maximum current value with a second preset value;
And the second judging module is used for judging that the preset sweep frequency curve is not matched with the actual sweep frequency curve when the actual maximum current value is larger than a second preset value.
In one embodiment, the matching judgment module further includes:
a second frequency determining module for determining a second frequency when the first current value is less than or equal to a first predetermined value; the second frequency is the frequency corresponding to the maximum current value in the actual sweep frequency curve;
the difference value calculation module is used for calculating the difference value between the second frequency and the reference frequency; the reference frequency is the frequency corresponding to the maximum current value in the preset sweep frequency curve;
and the third judging module is used for judging that the preset sweep frequency curve is not matched with the actual sweep frequency curve when the difference value between the second frequency and the reference frequency is larger than a preset third preset value.
In one embodiment, the matching judgment module further includes:
the parameter determining module is used for determining an actual maximum current value and a second frequency when the first current value is smaller than or equal to a first preset value; the actual maximum current value is the maximum current value in the actual sweep frequency curve; the second frequency is the frequency corresponding to the maximum current value in the actual sweep frequency curve;
the second preset value determining module is used for determining a second preset value according to the maximum current value in the preset sweep frequency curve;
A fourth judging module, configured to judge that the preset sweep frequency curve is not matched with the actual sweep frequency curve when the actual maximum current value is greater than a second predetermined value and the difference between the second frequency and the reference frequency is greater than a preset third predetermined value; the reference frequency is the frequency corresponding to the maximum current value in the preset sweep frequency curve.
For specific limitations of the atomizer anti-dry combustion device, reference may be made to the above limitation of the atomizer anti-dry combustion method, and no further description is given here. The above-mentioned each module in the atomizer anti-dry combustion device can be realized by all or part of software, hardware and the combination thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
In one embodiment, a computer device is provided, which may be a nebulizer, the internal structure of which may be as shown in fig. 14. The computer device includes a processor, a memory, a communication interface, a display screen, and an input device connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The communication interface of the computer device is used for carrying out wired or wireless communication with an external terminal, and the wireless mode can be realized through WIFI, an operator network, NFC (near field communication) or other technologies. The computer program when executed by a processor is to implement a method of preventing dry burn of an atomizer. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, and can also be keys, a track ball, a touch pad or the like arranged on the shell of the computer equipment.
It will be appreciated by those skilled in the art that the structure shown in fig. 14 is merely a block diagram of a portion of the structure associated with the present inventive arrangements and is not limiting of the computer device to which the present inventive arrangements are applied, and that a particular computer device may include more or fewer components than shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a nebulizer is provided, comprising a memory and a processor, the memory having a computer program stored therein, the processor implementing the steps of the method embodiments described above when the computer program is executed.
In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored which, when executed by a processor, carries out the steps of the method embodiments described above.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, or the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory. By way of illustration, and not limitation, RAM can be in the form of a variety of forms, such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), and the like.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (14)
1. An anti-dry burning method for an atomizer, which is characterized by comprising the following steps:
judging whether dry combustion occurs in the frequency sweeping stage; the frequency sweep stage is a working stage for acquiring the resonance frequency of the atomizing sheet, and the current of the atomizing sheet corresponding to the resonance frequency is the largest;
if the dry combustion is judged not to occur, determining the resonance frequency of the atomizing sheet;
outputting a driving signal according to the resonant frequency; the driving signal is used for indicating the driving circuit to drive the atomizing sheet to atomize according to the resonance frequency;
Acquiring a real-time current value of the atomizing sheet working at the resonant frequency;
if the dry burning is judged to occur according to the real-time current value, the dry burning protection is executed;
the step of judging whether dry combustion occurs in the frequency sweeping stage comprises the following steps:
acquiring an actual sweep frequency curve of an atomization sheet in a sweep frequency stage; the actual sweep frequency curve is data reflecting current change when the atomizing sheet works in a preset frequency range;
matching and judging the actual sweep frequency curve according to a preset sweep frequency curve; the preset sweep frequency curve is a logic curve model of current change when the atomizing sheet works in a preset frequency range;
and if the judgment result shows that the two images do not match, executing dry combustion protection.
2. The method of claim 1, wherein the step of performing dry burn protection if it is determined that dry burn occurs according to the real-time current value comprises:
judging whether the real-time current value falls into a dry combustion protection interval or not;
if not, executing dry combustion protection.
3. The method for preventing dry combustion of an atomizer according to claim 1, wherein the real-time current value includes a plurality of current values obtained according to a preset time, and the step of performing dry combustion protection if it is determined that dry combustion occurs according to the real-time current value includes:
Judging whether each real-time current value does not fall into a dry combustion protection interval;
if yes, dry-fire protection is executed.
4. The method of claim 1, further comprising, prior to performing the step of obtaining the real-time current value of the atomizing sheet:
and establishing a dry combustion protection interval.
5. The method of claim 4, wherein the step of establishing a dry-fire protection interval comprises:
acquiring a preset number of atomizing sheet current sampling values;
and determining a dry-burning protection interval according to the average value of the current sampling values.
6. The method of claim 5, wherein the step of determining a dry-fire protection interval from an average value of the current sampling values comprises:
removing the highest value and the lowest value of the preset number from the preset number of current sampling values;
calculating a current average value according to the residual current sampling values;
calculating an upper limit value and a lower limit value of the dry combustion protection interval; the upper limit value is obtained by floating the current average value by a first preset proportion; and the lower limit value is obtained by floating the current average value downwards by a second preset proportion.
7. The method of claim 4 to 6, wherein the step of establishing a dry-fire protection interval is performed according to a preset period.
8. The method for preventing dry combustion of an atomizer according to claim 1, wherein the step of performing matching judgment on the actual sweep frequency curve according to a preset sweep frequency curve comprises the steps of:
determining a first current value according to the actual sweep frequency curve; the first current value is a current value corresponding to a first frequency in the preset frequency range;
determining a first preset value according to a current value corresponding to the first frequency in a preset sweep frequency curve;
comparing the first current value with the first predetermined value;
and if the first current value is larger than the first preset value, judging that the first current value is not matched.
9. The method for preventing dry combustion of an atomizer according to claim 8, wherein the step of performing the matching judgment on the actual sweep frequency curve according to a preset sweep frequency curve further comprises:
if the first current value is smaller than or equal to the first preset value, determining an actual maximum current value; the actual maximum current value is the maximum current value in the actual sweep frequency curve;
Determining a second preset value according to the maximum current value in the preset sweep frequency curve;
comparing said actual maximum current value with said second predetermined value;
and if the actual maximum current value is larger than the second preset value, determining that the actual maximum current value is not matched.
10. The method for preventing dry combustion of an atomizer according to claim 8, wherein the step of performing the matching judgment on the actual sweep frequency curve according to a preset sweep frequency curve further comprises:
if the first current value is smaller than or equal to the first preset value, determining a second frequency; the second frequency is the frequency corresponding to the maximum current value in the actual sweep frequency curve;
calculating a difference between the second frequency and a reference frequency; the reference frequency is the frequency corresponding to the maximum current value in the preset sweep frequency curve;
and if the difference value between the second frequency and the reference frequency is larger than a preset third preset value, judging that the two frequencies are not matched.
11. The method for preventing dry combustion of an atomizer according to claim 8, wherein the step of performing the matching judgment on the actual sweep frequency curve according to a preset sweep frequency curve further comprises:
if the first current value is smaller than or equal to the first preset value, determining an actual maximum current value and a second frequency; the actual maximum current value is the maximum current value in the actual sweep frequency curve; the second frequency is the frequency corresponding to the maximum current value in the actual sweep frequency curve;
Determining a second preset value according to the maximum current value in the preset sweep frequency curve;
if the actual maximum current value is larger than the second preset value and the difference value between the second frequency and the reference frequency is larger than a preset third preset value, judging that the actual maximum current value is not matched;
the reference frequency is the frequency corresponding to the maximum current value in the preset sweep frequency curve.
12. An atomizer anti-dry combustion device, the device comprising:
the sweep frequency dry combustion judgment module is used for judging whether dry combustion occurs in a sweep frequency stage; the frequency sweep stage is a working stage for acquiring the resonance frequency of the atomizing sheet, and the current of the atomizing sheet corresponding to the resonance frequency is the largest;
the resonance frequency determining module is used for determining the resonance frequency of the atomizing sheet when the fact that dry burning does not occur is judged;
the driving signal output module is used for outputting a driving signal according to the resonance frequency; the driving signal is used for indicating the driving circuit to drive the atomizing sheet to atomize according to the resonance frequency;
the real-time current acquisition module is used for acquiring a real-time current value of the atomizing sheet working at the resonance frequency;
the dry-burning protection module is used for executing dry-burning protection when the dry burning is judged to occur according to the real-time current value;
Wherein, the sweep frequency dry combustion method judging module comprises the following steps:
the sweep frequency curve acquisition module is used for acquiring an actual sweep frequency curve of the atomizing sheet in the sweep frequency stage; the actual sweep frequency curve is data reflecting current change when the atomizing sheet works in a preset frequency range;
the matching judgment module is used for carrying out matching judgment on the actual sweep frequency curve according to a preset sweep frequency curve; the preset sweep frequency curve is a logic curve model of current change when the atomizing sheet works in a preset frequency range;
and the third protection module is used for executing dry combustion protection when the preset sweep frequency curve is not matched with the actual sweep frequency curve.
13. A nebulizer comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any one of claims 1 to 11 when the computer program is executed.
14. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 11.
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| CN114570550B (en) * | 2020-11-30 | 2023-09-29 | 深圳麦克韦尔科技有限公司 | Atomizing device and method of use thereof |
| CN114877507A (en) * | 2022-05-18 | 2022-08-09 | 深圳市太美亚电子科技有限公司 | Atomization piece dry-burning protection circuit, humidification device and dry-burning protection method |
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