Method and system for automatically adjusting concentration of dry salt aerosol

Abstract

The invention relates to the field of medical instruments, and discloses a dry salt aerosol concentration automatic adjusting method and system, and the method comprises the following steps: constructing a relation model between the dry salt aerosol concentration and the working parameters of dry salt aerosol generation equipment; acquiring a set dry salt aerosol concentration target value, a current salt sol concentration detection value and current working parameters of dry salt aerosol generating equipment; calculating a difference value between a set target value and an actual detection value of the dry salt aerosol concentration; giving a first voltage variation to the working voltage of the atomizing sheet, detecting the concentration of the dry salt aerosol after the voltage is adjusted, and calculating a first concentration variation of the dry salt aerosol before and after the working voltage of the atomizing sheet is changed; calculating a second voltage variation required to be adjusted by the working voltage of the atomization sheet when the concentration of the dry salt aerosol reaches a target value; and controlling the working voltage of the atomization sheet to adjust the second voltage change amount, and adjusting the concentration of the dry salt aerosol to a target value. According to the method, the problem that the concentration of the dry salt aerosol is not accurately controlled due to reasons such as the precision of the atomization sheet and micropore blockage can be solved.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to a method and system for automatically adjusting the concentration of dry salt aerosol. Background Art

[0002] Dry salt aerosol therapy is a salt therapy that releases clean, dry, dry salt-rich aerosol particles into the air. Patients can inhale dry salt aerosol into their lungs through deep breathing, and use the hypertonic effect of aerosol particles to destroy the cell walls of bacteria, causing pathogenic proteins to dehydrate and die in large quantities. While playing an anti-inflammatory and bactericidal role, it improves the state of respiratory biological communities and can reduce mucosal edema, thereby treating or relieving respiratory diseases.

[0003] Dry salt aerosol is produced by a dry salt aerosol generator that produces dry salt particles. The dry salt aerosol generator consists of a nebulizer, a ventilation module, and an evaporation module. The nebulizer includes a salt solution storage chamber and a nebulizer. The nebulizer nebulizes the salt solution into tiny salt mist droplets, which are then evaporated and dried into dry salt particles in the evaporation module. The ventilation module blows out the salt particles to form an aerosol. However, the atomization rate of the nebulizer may be inconsistent with the set concentration due to factors such as processing accuracy and micromesh clogging, making it impossible to achieve precise control of the concentration, which brings great inconsistencies to medical staff and patients, and even affects the treatment effect. Summary of the invention

[0004] In order to solve the problem that the concentration of salt sol cannot be accurately controlled due to the control accuracy of the atomizer and the blockage of the micromesh, the present invention provides a method and system for automatically adjusting the concentration of dry salt aerosol. The control system can adjust the working voltage of the atomizer to achieve automatic adjustment of the concentration of salt sol. The control logic is simple, and it can achieve automatic adjustment and intelligent control of the concentration of dry salt aerosol, thereby improving the treatment effect of patients.

[0005] To achieve the above object, the present invention proposes a technical solution, a method for automatically adjusting the concentration of dry salt aerosol, characterized in that it comprises the following steps: S1 builds a relationship model between dry salt aerosol concentration and working parameters of dry salt aerosol generating equipment; S2 obtains the set target value of dry salt aerosol concentration, the current salt aerosol concentration parameter and the current dry salt aerosol generating device operating parameter; S3 calculates the difference between the set target value and the current actual value of the dry salt aerosol concentration; S4 gives a first voltage change to the atomizing sheet working voltage, detects the dry salt aerosol concentration after adjusting the first voltage change, and calculates the first concentration change of the dry salt aerosol before and after changing the atomizing sheet working voltage; S5 calculates a second voltage change amount that needs to be readjusted for the atomizer working voltage when the dry salt aerosol concentration reaches a target value based on the first voltage change amount of the atomizer working voltage and the first concentration change amount of the dry salt aerosol concentration; S6 controls the working voltage of the atomizer to adjust the second voltage change amount, and adjusts the dry salt aerosol concentration to a set target value.

[0006] Specifically, in step S1, the operating parameters of the dry salt aerosol generating equipment include the concentration of the salt solution, the atomization rate of the atomizing sheet, and the ventilation flow rate of the fan.

[0007] Furthermore, the relationship model between the dry salt aerosol concentration and the working parameters of the dry salt aerosol generating device can be expressed as: Where: C 溶胶 is the dry salt aerosol concentration, in μg / m 3 ; V is the atomization rate, unit is μg / min; N is the ventilation flow, unit is m 3 / min; C 溶液 is the concentration of the salt solution, which means the percentage of the mass of salt in the total mass of the salt solution; The atomization rate is positively correlated with the working voltage of the atomizer; The ventilation flow rate is positively correlated with the fan operating voltage.

[0008] Specifically, the atomizer sheet includes an ultrasonic atomizer sheet and a microporous atomizer sheet, wherein: The atomization rate of the ultrasonic atomizer is positively correlated with the working voltage. The higher the working voltage, the higher the ultrasonic frequency, the higher the atomization rate, the larger the amount of salt mist produced, the smaller the salt mist particle size, and the higher the concentration of the salt sol formed after evaporation and drying. The atomization rate of the microporous atomizer is related to the micropore diameter, the number of micropores and the working voltage. The larger the micropore diameter, the more micropores and the higher the working voltage, the greater the amount of salt spray produced and the greater the atomization rate. When the pore diameter and the number of micropores of the microporous atomizer are determined, within the working voltage range of the microporous atomizer, the atomization rate is linearly related to the working voltage.

[0009] Furthermore, in step S3, the expression for the difference between the set value and the actual value of the dry salt aerosol concentration is: Where: C 设定 Set a target value for the dry salt aerosol concentration, C 实际 is the actual detection value of dry salt aerosol concentration, △C is the difference between the set value and the actual value of dry salt aerosol concentration; The △C > 0 indicates that the actual detected value of the dry salt aerosol concentration is less than the set target value; The △C < 0 indicates that the actual detected value of the dry salt aerosol concentration is greater than the set target value.

[0010] Furthermore, in step S4, the salt solution concentration and the fan operating voltage remain unchanged, and the change direction of the first change amount is the same as the dry salt aerosol concentration difference, specifically: If △C > 0, the atomizer sheet working voltage is increased, and the first voltage change amount of the atomizer sheet working voltage is a positive value; If △C < 0, the working voltage of the atomizer sheet is reduced, and the first voltage change amount of the working voltage of the atomizer sheet is a negative value.

[0011] Furthermore, the first concentration variation is specifically: Where: △C 1 is the first concentration change, C 调 To adjust the dry salt aerosol concentration detection value after the first voltage change, C 实际 The dry salt aerosol concentration detection value before adjusting the first voltage change amount.

[0012] Furthermore, the specific steps of step S5 are: S501 builds a relationship model between dry salt aerosol concentration and the working voltage of the atomizer; S502 obtains a second concentration change amount that needs to be adjusted according to the dry salt aerosol concentration difference and the first concentration change amount; S503 calculates the second voltage change that needs to be adjusted based on the first voltage change, the first concentration change, and the second concentration change through the dry salt aerosol concentration and the atomizer working voltage relationship model.

[0013] Furthermore, it is characterized in that, according to the relationship model between the dry salt aerosol concentration and the working parameter of the dry salt aerosol generating device, the relationship model between the dry salt aerosol concentration and the working voltage of the atomizing sheet is expressed as: Where: C 溶胶 is the dry salt aerosol concentration, U is the atomizer working voltage, k 2 is the relationship coefficient.

[0014] Furthermore, the second concentration variation is: Where: △C 2 is the second concentration change, C 设定 Set a target value for the dry salt aerosol concentration, C 调 The dry salt aerosol concentration detection value after adjusting the first voltage change amount; According to the relationship model between the dry salt aerosol concentration and the atomizer working voltage, we can obtain: Where: C 实际 To adjust the dry salt aerosol concentration detection value before the first voltage change, C 设定 Set the target value for the dry salt aerosol concentration, △U 1 is the first voltage change, C 调 To adjust the dry salt aerosol concentration detection value after the first voltage change, △U 2 is the second voltage change amount.

[0015] Furthermore, the dry salt aerosol generating device is set to N gears, with gear 1 being the lowest gear and gear N being the highest gear, and each time a gear is increased, the corresponding atomizing sheet working voltage is increased by a fixed amplitude △X, and the corresponding dry salt aerosol concentration is increased by a fixed amplitude △Y .

[0016] Furthermore, when it is detected that the actual measured concentration of dry salt aerosol is inconsistent with the current gear concentration target value, the difference △C between the current gear dry salt aerosol concentration target value and the actual measured value is first calculated, and △C is compared with △Y; If △C is a positive value and is greater than the amplitude △Y of one gear, an excessive deviation alarm signal is issued, and it is determined whether the concentration of the salt solution is correct; if the concentration of the salt solution is not used correctly, replace it with a salt solution that meets the concentration requirements; if the concentration of the salt solution is used correctly, it can be determined that the micropores of the atomizer are severely clogged, and the atomizer should be cleaned or replaced with a new one before starting the machine for use.

[0017] If ΔC is smaller than the adjustment range of one gear, the atomizer plate operating voltage is adjusted according to steps S1 to S6.

[0018] Also disclosed is a dry salt aerosol concentration adjustment system, which can realize the above-mentioned dry salt aerosol concentration automatic adjustment method, characterized in that it includes a control module, an atomization module, a ventilation module, an evaporation module, and a detection module; An atomization module, comprising an atomization sheet and a liquid storage chamber, for atomizing the salt solution into salt mist; The evaporation module comprises an evaporation chamber and a heating component for heating the evaporation chamber, wherein the evaporation chamber is connected to the atomization module and is used for evaporating and drying the salt mist into salt particles; The ventilation module is connected to the evaporation chamber to accelerate the evaporation and drying of the salt mist and blow out the dried salt particles to form dry salt aerosol; The detection module includes a voltage feedback module and a concentration detection module, which detects the working voltage of the atomizer and the concentration of dry salt aerosol, and feeds back the detected data to the control module; The control module receives the detection data fed back by the detection module for analysis and calculation, and outputs a control signal to control the working voltage of the atomizer.

[0019] Beneficial effects of the present invention: 1. By automatically adjusting the working voltage of the atomizer, the problem of inconsistency between the actual value of the dry salt aerosol concentration generated by the dry salt aerosol generator and the set target value caused by the production accuracy of the atomizer and micropore blockage is solved, thereby improving the control accuracy of the dry salt aerosol concentration and achieving precise treatment.

[0020] 2. By automatically adjusting the concentration of dry salt aerosol, the manual adjustment process of the dry salt aerosol generating device can be reduced, the assembly and testing efficiency of the dry salt aerosol device can be improved, and the product yield rate can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. For those skilled in the art, other drawings can be obtained based on the drawings without paying creative work.

[0022] Figure 1 This is a flow chart of automatic adjustment of dry salt aerosol concentration of the present invention; Figure 2 It is a schematic diagram of the automatic adjustment system of dry salt aerosol concentration of the present invention; DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] like Figure 1 As shown, an embodiment of the dry salt aerosol concentration adjustment of the present invention comprises the following steps: S1 builds a relationship model between dry salt aerosol concentration and working parameters of dry salt aerosol generating equipment; S2 obtains the set target value of dry salt aerosol concentration, the current salt aerosol concentration parameter and the current dry salt aerosol generating device operating parameter; S3 calculates the difference between the set target value and the current actual value of the dry salt aerosol concentration; S4 gives a first voltage change to the atomizing sheet working voltage, detects the dry salt aerosol concentration after adjusting the first voltage change, and calculates the first concentration change of the dry salt aerosol before and after changing the atomizing sheet working voltage; S5 calculates a second voltage change amount that needs to be readjusted for the atomizer working voltage when the dry salt aerosol concentration reaches a target value based on the first voltage change amount of the atomizer working voltage and the first concentration change amount of the dry salt aerosol concentration; S6 controls the working voltage of the atomizer to adjust the second voltage change amount, and adjusts the dry salt aerosol concentration to a set target value.

[0025] In this embodiment, the dry salt aerosol generating device uses a microporous atomizer, and the working parameters include the concentration of the salt solution, the atomization rate of the atomizer, and the ventilation flow rate of the fan.

[0026] Furthermore, the relationship model between the dry salt aerosol concentration and the working parameters of the dry salt aerosol generating device can be expressed as: Where: C 溶胶 is the dry salt aerosol concentration, in μg / m 3 ; V is the atomization rate, unit is μg / min; N is the ventilation flow, unit is m 3 / min; C 溶液 is the concentration of the salt solution, which means the percentage of the mass of salt in the total mass of the salt solution; The atomization rate is positively correlated with the working voltage of the atomizer; The ventilation flow rate is positively correlated with the fan operating voltage.

[0027] Calculate the difference between the set value and the actual value of the dry salt aerosol concentration. The expression is:

[0028] Where: C 设定 Set a target value for the dry salt aerosol concentration, C 实际 is the actual detection value of dry salt aerosol concentration, △C is the difference between the set value and the actual value of dry salt aerosol concentration; When △C > 0, it means that the actual detection value of dry salt aerosol concentration is less than the set target value; When △C < 0, it means that the actual detection value of dry salt aerosol concentration is greater than the set target value.

[0029] In this embodiment, the concentration of the salt solution and the working voltage of the fan are kept constant, and the atomization rate is adjusted by changing the working voltage of the atomizing sheet to achieve the adjustment of the salt sol concentration.

[0030] In this embodiment, a first voltage change amount in the same direction as the difference between the set value and the actual value of the dry salt aerosol concentration is given to the atomizer working voltage, specifically: If △C > 0, the atomizer sheet working voltage is increased, and the first voltage change amount of the atomizer sheet working voltage is a positive value; If △C < 0, the working voltage of the atomizer sheet is reduced, and the first voltage change amount of the working voltage of the atomizer sheet is a negative value.

[0031] After the atomizer working voltage is adjusted, the salt aerosol concentration changes accordingly. The adjusted dry salt aerosol concentration data is detected, and the change in the dry salt aerosol concentration before and after adjusting the first voltage change is calculated, specifically: Where: △C 1 is the first concentration change, C 调 To adjust the dry salt aerosol concentration detection value after the first voltage change, C 实际 The dry salt aerosol concentration detection value before adjusting the first voltage change amount.

[0032] In this embodiment, after obtaining the first concentration change of the dry salt aerosol concentration before and after adjusting the first voltage change, a relationship model between the dry salt aerosol concentration and the working voltage of the atomizer is constructed according to the first voltage change and the corresponding first concentration change. The specific steps are as follows: According to the relationship model between the dry salt aerosol concentration and the working parameters of the dry salt aerosol generating equipment, when the salt solution concentration C 溶液 , ventilation flow remains unchanged, salt sol concentration C 溶胶 It is proportional to the atomization rate V, and formula (1) can be regarded as is a direct proportional function of a constant, set:

[0033] Substituting into formula (1) we get: Where: C 溶胶 is the dry salt aerosol concentration; V is the atomization rate; k 1 is the relationship coefficient.

[0034] The atomization rate of the microporous atomizer is related to the micropore diameter, the number of micropores and the working voltage. The larger the micropore diameter, the more micropores and the higher the working voltage, the greater the amount of salt spray produced and the greater the atomization rate. When the pore diameter and the number of holes of the microporous atomizer are determined, within the normal working voltage range of the microporous atomizer, the atomization rate is a proportional function to the working voltage. Formula (4) can be transformed to obtain the relationship model between the dry salt aerosol concentration and the working voltage of the atomizer, which can be expressed as formula (5): Where: C 溶胶 is the dry salt aerosol concentration; U is the working voltage of the atomizer; k 2 is the relationship coefficient, and its specific value is determined by the micropore diameter, micropore quantity, salt solution concentration and ventilation flow rate of the atomizer.

[0035] Then, the second concentration change amount that needs to be adjusted is obtained according to the dry salt aerosol concentration difference and the first concentration change amount. The second concentration change amount is: Where: △C 2 is the second concentration change, C 设定 Set a target value for the dry salt aerosol concentration, C 调 The dry salt aerosol concentration detection value after the atomizer working voltage is adjusted by a first voltage change amount; Then, the second voltage change required to adjust the second concentration change is calculated, and the following relationship is obtained according to the characteristics of the linear relationship:

[0036] Where: C 实际 To adjust the dry salt aerosol concentration detection value before the first voltage change, C 设定 Set the target value for the dry salt aerosol concentration, △U 1 is the first voltage change, C 调 is the dry salt aerosol concentration detection value after the atomizer working voltage is adjusted by the first voltage change, △U 2 is the second voltage change required.

[0037] Substituting formula (3) and (6) into formula (7) yields:

[0038] After transforming formula (8), we get formula (9): Where: C 实际 To adjust the dry salt aerosol concentration detection value before the first voltage change, C 设定 Set the target value for the dry salt aerosol concentration, △U 1 is the first voltage change, C 调 is the dry salt aerosol concentration detection value after the atomizer working voltage is adjusted by the first voltage change, △U 2 is the second voltage change required.

[0039] The second voltage change △U that needs to be adjusted for the atomizer working voltage can be calculated by formula (9): 2 The control module controls the working voltage of the atomizer and then adjusts the second voltage change △U 2, so that the concentration of dry salt aerosol formed after evaporation and drying is the same as the set concentration.

[0040] Example 1: When the first voltage change of the atomizer plate working voltage increases, it is set to △U 1 =0.1V, when it decreases, it is set to △U 1 =-0.1V; the salt solution concentration is a certain value, and the fan operating voltage of the ventilation module remains constant, that is, the salt solution concentration and the ventilation flow rate are both fixed values; The target concentration of dry salt aerosol is 10 μg / m 3 The actual measured value of dry salt aerosol concentration is 8 μg / m 3 According to formula (2), the difference between the target value and the actual measured value of dry salt aerosol concentration is △C = 2μg / m 3 The target value of dry salt aerosol concentration is greater than the actual measured value. The working voltage of the atomizer needs to be increased. The current working voltage of the atomizer is 3 volts. First, the working voltage of the atomizer is increased by 0.1 volts. That is, when the working voltage is increased to 3.1 volts, the actual value of the dry salt aerosol concentration after adjusting the working voltage of the atomizer is 8.8 μg / m 3 According to formula (3), the first concentration change of dry salt aerosol is △C 1 =0.8 μg / m 3 According to formula (6), the dry salt aerosol concentration needs to be increased by △C 2 =1.2 μg / m 3 , △U 1 , △C 1 , △C 2 Substitute the data into formula (9):

[0041] We get: △U 2 = 0.15 That is, the operating voltage of the atomizer needs to be increased by 0.15 volts.

[0042] After the control system automatically adjusts the working voltage of the atomizer to 3.25 volts, the actual concentration of the salt sol is the same as the set value.

[0043] Example 2: The target value of dry salt aerosol concentration is 10 μg / m 3 The actual measured value of dry salt aerosol concentration is 9.5 μg / m 3 According to formula (2), the difference between the target value and the actual measured value of dry salt aerosol concentration is △C = 0.5 μg / m 3, the target value of dry salt aerosol concentration is greater than the actual measured value, and the atomizer working voltage needs to be increased; the current atomizer working voltage is 3 volts, first increase the atomizer working voltage by 0.1 volt, that is, adjust the atomizer working voltage to 3.1 volts, and measure the actual value of dry salt aerosol concentration after adjusting the atomizer working voltage to 10.5 μg / m 3 According to formula (3), the first concentration change of dry salt aerosol is △C 1 =1 μg / m 3 , the actual measured value of dry salt aerosol concentration exceeds the concentration target value. According to formula (6), the dry salt aerosol concentration needs to be increased by △C 2 =-0.5 μg / m 3 , that is, it needs to be reduced by 0.5 μg / m 3 , △U 1 , △C 1 , △C 2 Substitute the data into formula (9):

[0044] We get: △U 2 = -0.05 That is, the operating voltage of the atomizer needs to be reduced by 0.05 volts.

[0045] After the control system automatically adjusted the atomizer working voltage to 3.05 volts, the actual concentration of the dry salt aerosol was the same as the set value.

[0046] Example 3: The target value of dry salt aerosol concentration is 10 μg / m 3 The actual measured value of dry salt aerosol concentration is 10.5 μg / m 3 According to formula (2), the difference between the target value and the actual measured value of dry salt aerosol concentration is △C = -0.5 μg / m 3 , the target value of dry salt aerosol concentration is less than the actual measured value, and the atomizer working voltage needs to be reduced; the current atomizer working voltage is 3 volts, first reduce the atomizer working voltage by 0.1 volt, that is, △U 1 =-1, indicating that the working voltage of the atomizer is adjusted to 2.9 V. The actual value of the dry salt aerosol concentration after adjusting the working voltage of the atomizer is 9.5 μg / m 3 According to formula (3), the first concentration change of dry salt aerosol is △C 1 =-1 μg / m 3 , the actual measured value of dry salt aerosol concentration is less than the concentration target value. According to formula (6), the dry salt aerosol concentration needs to be increased by △C 2 =0.5 μg / m 3 , △U 1 , △C 1 , △C2 Substitute the data into formula (9):

[0047] We get: △U 2 = -0.05 That is, the operating voltage of the atomizer needs to be reduced by 0.05 volts.

[0048] After the control system automatically adjusted the atomizer working voltage to 3.05 volts, the actual concentration of the dry salt aerosol was the same as the set value.

[0049] Example 4: The dry salt aerosol generating device is set to level 6. The level, operating voltage and corresponding dry salt aerosol concentration are shown in Table 1.

[0050] Table 1 Comparison table of adjustment gear and dry salt aerosol concentration Each time a gear is changed, the voltage of the atomizer changes by 0.5 V and the concentration of dry salt aerosol changes by 5 μg / m 3 When the actual measured concentration of dry salt aerosol is inconsistent with the current gear concentration target value, the difference △C between the dry salt aerosol concentration target value and the actual measured value is first determined according to formula (2).

[0051] If △C is a positive value and is greater than the adjustment range of one gear, an excessive deviation alarm signal is issued, and it is determined whether the salt solution concentration is correct; if the salt solution concentration is not used correctly, replace it with a salt solution that meets the concentration requirements; if the salt solution concentration is used correctly, it can be determined that the micropores of the atomizer are severely clogged, and the atomizer should be cleaned or replaced with a new one before starting the machine for use.

[0052] If △C is smaller than the adjustment range of one gear, adjust according to the adjustment steps of Example 1.

[0053] like Figure 2 As shown, an embodiment of a dry salt aerosol concentration adjustment system includes a control module, an atomization module, a ventilation module, an evaporation module, and a detection module; An atomization module, comprising an atomization sheet and a liquid storage chamber, for atomizing the salt solution into salt mist; The evaporation module comprises an evaporation chamber and a heating component for heating the evaporation chamber, wherein the evaporation chamber is connected to the atomization module and is used for evaporating and drying the salt mist into salt particles; The ventilation module is connected to the evaporation chamber to accelerate the evaporation and drying of the salt mist and blow out the dried salt particles to form dry salt aerosol; The detection module includes a voltage feedback module and a concentration detection module, which detects the working voltage of the atomizer and the concentration of dry salt aerosol, and feeds back the detected data to the control module; The control module receives the detection data fed back by the detection module for analysis and calculation, and outputs a control signal to control the working voltage of the atomizer.

[0054] The control module receives the dry salt sol concentration signal detected by the monitoring module, and compares the received concentration signal with the set concentration target value. If they are equal, it continues to operate according to the current working parameters; if they are not equal, the difference between the concentration signal value and the set target value is determined, and the working voltage of the atomizer is controlled to change a voltage change according to the deviation direction. The atomization rate of the atomizer changes, and the generated salt mist is dried by the evaporation module to form salt particles. The ventilation module inputs fresh air to blow out the dry salt particles to form dry salt aerosol. The detection module detects the current concentration of the dry salt aerosol and feeds back the concentration signal to the control module. The control module receives the signal and calculates the concentration change. Then, through the preset dry salt aerosol concentration-voltage relationship model, the voltage change that needs to be made is calculated, and the working voltage of the atomizer is controlled to make a new change. The detection module detects the concentration of the dry salt aerosol again, and feeds back the detection signal to the control module. If the concentration reaches the target value, the control module controls the atomizer to work according to the current working voltage.

[0055] In the present invention, the salt refers to sodium chloride; the salt solution refers to a sodium chloride solution formed when sodium chloride is dissolved in water, which may contain trace amounts of elements such as magnesium and potassium; dry salt aerosol, rock salt aerosol and salt sol have the same meaning, which are all solid sols formed by sodium chloride particles suspended in the air.

[0056] Although the preferred implementation cases of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms of specific changes without departing from the scope of protection of the invention spirit and claims, which all fall within the scope of protection of the present invention.

Claims

1. A method for automatically adjusting the concentration of dry salt aerosol, characterized in that: The following steps are involved: S1 builds a relationship model between dry salt aerosol concentration and working parameters of dry salt aerosol generating equipment; S2 obtains the set target value of dry salt aerosol concentration, the current salt aerosol concentration parameter and the current dry salt aerosol generating device working parameter; S3 calculates the difference between the set target value and the current actual value of the dry salt aerosol concentration; S4 gives a first voltage change to the atomizing sheet working voltage, detects the dry salt aerosol concentration after adjusting the first voltage change, and calculates the first concentration change of the dry salt aerosol before and after changing the atomizing sheet working voltage; S5 calculates a second voltage change amount that needs to be readjusted for the atomizer working voltage when the dry salt aerosol concentration reaches a target value based on the first voltage change amount of the atomizer working voltage and the first concentration change amount of the dry salt aerosol concentration; S6 controls the working voltage of the atomizer to adjust the second voltage change amount, and adjusts the dry salt aerosol concentration to a set target value.

2. The method for automatically adjusting the concentration of dry salt aerosol according to claim 1, characterized in that: In step S1, the operating parameters of the dry salt aerosol generating equipment include the concentration of the salt solution, the atomization rate of the atomizing sheet, and the ventilation flow rate of the fan.

3. The method for automatically adjusting the concentration of dry salt aerosol according to claim 2, characterized in that: The relationship model between the dry salt aerosol concentration and the working parameters of the dry salt aerosol generating equipment can be expressed as: Where: C 溶胶 is the dry salt aerosol concentration, in μg / m 3 ; V is the atomization rate, unit is μg / min; N is the ventilation flow, unit is m 3 / min; C 溶液 is the concentration of the salt solution, which means the percentage of the mass of salt in the total mass of the salt solution; The atomization rate is positively correlated with the working voltage of the atomizer; The ventilation flow rate is positively correlated with the fan operating voltage.

4. The method for automatically adjusting the concentration of dry salt aerosol according to claim 3, characterized in that: In step S3, the expression for the difference between the set value and the actual value of the dry salt aerosol concentration is: Where: C 设定 Set a target value for the dry salt aerosol concentration, C 实际 is the actual detection value of dry salt aerosol concentration, △C is the difference between the set value and the actual value of dry salt aerosol concentration; The △C > 0 indicates that the actual detected value of the dry salt aerosol concentration is less than the set target value; The △C < 0 indicates that the actual detected value of the dry salt aerosol concentration is greater than the set target value.

5. The method for automatically adjusting the concentration of dry salt aerosol according to claim 4, characterized in that: In step S4, the concentration of the salt solution and the operating voltage of the fan remain unchanged, and the change direction of the first change amount is the same as the difference in the dry salt aerosol concentration, specifically: If △C > 0, the atomizer sheet working voltage is increased, and the first voltage change amount of the atomizer sheet working voltage is a positive value; If △C < 0, the working voltage of the atomizer sheet is reduced, and the first voltage change amount of the working voltage of the atomizer sheet is a negative value.

6. The method for automatically adjusting the concentration of dry salt aerosol according to claim 5, characterized in that: The first concentration variation is specifically: Where: △C1 is the first concentration change, C 调 To adjust the dry salt aerosol concentration detection value after the first voltage change, C 实际 The dry salt aerosol concentration detection value before adjusting the first voltage change amount.

7. The method for automatically adjusting the concentration of dry salt aerosol according to claim 4, characterized in that: The specific steps of step S5 are: S501 builds a relationship model between dry salt aerosol concentration and the working voltage of the atomizer; S502 obtains a second concentration change amount that needs to be adjusted according to the dry salt aerosol concentration difference and the first concentration change amount; S503 calculates the second voltage change that needs to be adjusted based on the first voltage change, the first concentration change, and the second concentration change through the dry salt aerosol concentration and the atomizer working voltage relationship model.

8. The method for automatically adjusting the concentration of dry salt aerosol according to claim 7, characterized in that: According to the relationship model between the dry salt aerosol concentration and the working parameters of the dry salt aerosol generating device, the relationship model between the dry salt aerosol concentration and the working voltage of the atomizer is expressed as: Where: C 溶胶 is the dry salt aerosol concentration, U is the working voltage of the atomizer, and k2 is the relationship coefficient.

9. The method for automatically adjusting the concentration of dry salt aerosol according to claim 8, characterized in that: The second concentration variation is: Where: △C2 is the second concentration change, C 设定 Set a target value for the dry salt aerosol concentration, C 调 The dry salt aerosol concentration detection value after adjusting the first voltage change amount; According to the relationship model between the dry salt aerosol concentration and the atomizer working voltage, we can obtain: Where: C 实际 To adjust the dry salt aerosol concentration detection value before the first voltage change, C 设定 is the target value set for the dry salt aerosol concentration, △U1 is the first voltage change, C 调 To adjust the dry salt aerosol concentration detection value after the first voltage change, △U2 is the second voltage change.

10. A dry salt aerosol concentration adjustment system, capable of implementing the dry salt aerosol concentration automatic adjustment method according to any one of claims 1 to 9, characterized in that: It includes a control module, an atomization module, a ventilation module, an evaporation module, and a detection module; An atomization module, comprising an atomization sheet and a liquid storage chamber, for atomizing the salt solution into salt mist; The evaporation module comprises an evaporation chamber and a heating component for heating the evaporation chamber, wherein the evaporation chamber is connected to the atomization module and is used for evaporating and drying the salt mist into salt particles; The ventilation module is connected to the evaporation chamber to accelerate the evaporation and drying of the salt mist and blow out the dried salt particles to form dry salt aerosol; The detection module includes a voltage feedback module and a concentration detection module, which detects the working voltage of the atomizer and the concentration of dry salt aerosol, and feeds back the detected data to the control module; The control module receives the detection data fed back by the detection module for analysis and calculation, and outputs a control signal to control the working voltage of the atomizer.

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