Dry salt aerosol concentration automatic control method and system based on salt solution

Abstract

The invention relates to the field of medical instruments, and discloses a dry salt aerosol concentration automatic control method and system based on a salt solution, and the method comprises the steps: firstly obtaining a dry salt aerosol concentration set target value, a current concentration detection value and working parameters of current dry salt aerosol generation equipment; obtaining a difference value between the actual concentration value and the target value; calculating unit variation of corresponding parameters according to the working parameters of the dry salt aerosol generating equipment; then, according to the direct proportion function or inverse proportion function relation between the dry salt aerosol concentration and the working parameters, the change amount needing to be made by each parameter is calculated; and finally, according to the direct proportion function relationship among the working voltage, the atomization rate and the ventilation flow, calculating the change quantity required to be made by the working voltage, and changing the corresponding working voltage to enable the dry salt aerosol concentration to reach a set target value. According to the invention, the concentration of the dry salt aerosol can be automatically controlled, the concentration control precision is improved, and the treatment effect and the controllability of equipment are improved.

Description

Technical Field

[0001] The present invention relates to medical device equipment, and particularly to an automatic control method and system for the concentration of dry salt aerosol based on a salt solution. Background Art

[0002] Dry salt aerosol therapy is a salt therapy that can release clean and dry salt aerosols rich in dry salt aerosol particles into the air. Patients can inhale the dry salt aerosol into the lungs through deep breathing. By using the hypertonic effect of the aerosol particles, the cell walls of bacteria are destroyed, and the pathogenic proteins are dehydrated in large quantities and die. While playing an anti-inflammatory and bactericidal role, it can improve the state of the respiratory tract biological community, and can also make the mucosal edema subside, achieving the treatment or relief of respiratory diseases.

[0003] Dry salt aerosol is an aerosol formed by a dry salt aerosol generating device generating dry salt particles and diffusing the salt particles into the air. Different disease types and degrees require corresponding different dry salt aerosol concentrations. In addition, due to the occurrence of equipment deviation, drying degree deviation, leakage, salt particle deposition, etc., the actually monitored dry salt aerosol concentration is inconsistent with the theoretical concentration of the operating parameters. However, the existing dry salt aerosol therapeutic apparatus only generates dry salt aerosol with a corresponding concentration by setting a fixed gear. On the one hand, it is necessary to manually switch gears to achieve corresponding adjustment to the corresponding concentration. On the other hand, when there is a deviation between the concentration corresponding to the set gear and the actual concentration, it cannot be adjusted independently, and it is necessary to return to the factory to adjust the internal parameters to solve the problem, which brings great inconvenience to medical staff. Summary of the Invention

[0004] To solve the problem that the dry salt aerosol concentration cannot be adjusted independently when there is a deviation, the present invention provides an automatic control method and system for the concentration of dry salt aerosol based on a salt solution. Through this adjustment method, when it is detected that the actually monitored concentration is inconsistent with the preset concentration, the working parameters can be adjusted independently to achieve the automatic control of the dry salt aerosol concentration.

[0005] To achieve the above object, the present invention proposes a technical solution, an automatic control method for the concentration of dry salt aerosol based on a salt solution, comprising the following steps: S1 Obtain the set target value parameter C of the dry salt aerosol concentration 设定 , the current dry salt aerosol concentration parameter C 实际 and the working parameters of the current dry salt aerosol generating device, wherein the working parameters of the current dry salt aerosol generating device include: a first working parameter, a second working parameter, and a third working parameter; S2 Obtain the difference △C between the target value C of the dry salt aerosol concentration 设定 and the current actual value C 实际 according to the obtained parameters; S3 keeps the first working parameter and the second working parameter unchanged, and calculates the unit change amount of the dry salt aerosol concentration when the third working parameter changes; S4 based on the target value C of the dry salt aerosol concentration 设定 and the actual value C of the concentration 实际 calculate the total change amount that the third working parameter needs to be adjusted according to the difference △C and the unit change amount of the dry salt aerosol concentration; S5 controls the voltage output according to the total change amount that the third working parameter needs to be adjusted, so that the third working parameter is adjusted to the target value; S6 obtains the dry salt aerosol concentration parameter C after the third working parameter is adjusted 调 ; If C 调 = C 设定 , then operate according to the adjusted parameters; If C 调 ≠ C 设定 , then perform secondary adjustment on the third working parameter until C 调 = C 设定 .

[0006] Specifically, the actual value of the current dry salt aerosol concentration is obtained through a concentration sensor; the first working parameter, the second working parameter, and the third working parameter are different from each other; the first working parameter, the second working parameter, and the third working parameter respectively correspond to any one of the current salt solution concentration parameter C 溶液 , the current atomization rate parameter V, and the current ventilation flow rate N; The current atomization rate parameter V is calculated from the atomization sheet parameter and the atomization sheet working frequency, or obtained through sensor detection; The current salt solution concentration parameter C 溶液 is obtained when preparing the solution, or obtained through a concentration meter; The ventilation flow rate N is calculated from the fan speed and the rated output of the ventilation module of the ventilation module, or obtained through a flow sensor; The atomization sheet working frequency is controlled by the input voltage of the atomization sheet, and the fan speed is controlled by the input voltage of the ventilation module.

[0007] The meaning of the atomization rate is the amount of salt solution atomized into salt mist by the atomization sheet per unit time, that is, the salt mist generation rate.

[0008] During the normal operation of the dry salt aerosol generating device, adjusting the atomization rate V and the ventilation flow rate N are both achieved by adjusting the input voltage. Adjusting the atomization rate V to the target value V1 means adjusting the input voltage U 雾化 of the atomization sheet to the target value U1; adjusting the ventilation flow rate N to the target value N1 means adjusting the ventilation input voltage U 通风 to the target value U2.

[0009] Specifically, in the step S1, the atomizing sheet includes: A microporous atomizing sheet, the parameters of the atomizing sheet including the micropore diameter and the number of micropores, and the atomizing rate increasing with the increase of the micropore diameter, the number of micropores, and the atomizing frequency; An ultrasonic atomizing sheet, the atomizing rate being obtained from the atomizing frequency, and the atomizing rate increasing with the increase of the atomizing frequency.

[0010] Further, in the step S2, if the difference is 0, continue with the current operating parameters; if the difference is not 0, adjust the operating parameters.

[0011] Further, in the step S3, the specific calculation steps for the unit change amount of the dry salt aerosol concentration are as follows: S301 Construct a relational expression between the dry salt aerosol concentration, the salt solution concentration, the atomizing rate, and the ventilation flow rate: Where: C 溶胶 Is the dry salt aerosol concentration, with the unit μg / m 3 ; V is the atomizing rate, with the unit μg / min; N is the ventilation flow rate, with the unit m 3 / min; C 溶液 Is the salt solution concentration, with the unit %, representing the percentage of the mass of the salt in the total mass of the salt solution; V·C 溶液 Represents the dry salt particle generation rate; S302 If only the atomizing rate parameter is changed, calculate the change amount of the dry salt particle generation rate when the atomizing rate V changes to V1 according to the current salt solution concentration C 溶液 , and then calculate the unit change amount of the dry salt aerosol concentration according to the current ventilation flow rate N; If only the salt solution concentration parameter is changed, calculate the change amount of the dry salt particle generation rate when the salt solution concentration C 溶液 Changes according to the current atomizing rate V, and then calculate the unit change amount of the dry salt aerosol concentration according to the current ventilation flow rate N; If only the ventilation flow rate parameter is changed, calculate the unit change amount of the dry salt aerosol concentration according to the current atomizing rate V and the salt solution concentration C 溶液 .

[0012] Further, in the step S5, the specific logic for adjustment is: If the difference is greater than 0, indicating that the actual concentration is less than the target concentration, increase the total change amount required by the atomizing rate parameter according to the proportional function; or increase the total change amount required by the salt solution concentration parameter according to the proportional function; or decrease the total change amount required by the ventilation flow rate parameter according to the inverse proportional function; If the difference is less than 0, it means the actual concentration is greater than the target concentration. Then, the total change amount required to reduce the atomization rate parameter according to a direct proportional function; or the total change amount required to reduce the salt solution concentration parameter according to a direct proportional function; or the total change amount required to increase the ventilation flow rate parameter according to an inverse proportional function. The increase in the atomization rate is achieved by increasing the input voltage of the atomization sheet; the decrease in the atomization rate is achieved by decreasing the input voltage of the atomization sheet. The increase in the ventilation flow rate is achieved by increasing the input voltage of the ventilation module, and the decrease in the ventilation flow rate is achieved by decreasing the input voltage of the ventilation module. The increase in the salt solution concentration is achieved by adding a high-concentration salt solution or replacing it with a high-concentration salt solution; the decrease in the salt solution concentration is achieved by diluting with water or replacing it with a low-concentration salt solution. The priority of the working parameter adjustment is: atomization rate > salt solution concentration > ventilation flow rate.

[0013] Further, convert the unit change amount of the dry salt aerosol concentration to the change amount of the dry salt aerosol concentration when the input working voltage changes by 1 volt.

[0014] Further, in step S6, the specific logic for the secondary adjustment is: repeat steps S1 - S5 until C 调 =C 设定 .

[0015] Further, when making the total change amount required to increase the atomization rate, it is also necessary to detect the dryness of the dry salt aerosol.

[0016] Further, the specific logic for detecting the dryness of the dry salt aerosol is: If the dryness meets the preset requirements, operate according to the adjusted parameters; If the dryness does not meet the preset requirements, increase the drying temperature.

[0017] Specifically, the increase in the drying temperature needs to meet the following logic: Set the control threshold of the drying temperature. If the drying temperature reaches the set upper limit threshold, keep the drying temperature and the salt solution concentration unchanged, and simultaneously decrease the input voltage of the atomization sheet and the input voltage of the ventilation module; Or, keep the drying temperature unchanged, keep the input voltage of the ventilation module unchanged, increase the salt solution concentration, and simultaneously decrease the input voltage of the atomization sheet.

[0018] Specifically, the preset requirement for the dryness is: water content ≤ 1%.

[0019] Preferably, the preset requirement for the dryness is: water content ≤ 0.3%.

[0020] To implement the above automatic control method, the present invention also discloses an automatic control system for the concentration of dry salt aerosol based on salt solution, which includes an atomization module, an evaporation module, a ventilation module, a detection module and a control module; The atomization module is used to atomize the salt solution into salt mist; The evaporation module includes an evaporation chamber and a heating component for heating the evaporation chamber. The evaporation chamber is connected to the atomization module and is used to evaporate the moisture in the salt mist to form dry salt particles; The ventilation module is connected to the evaporation module and is used to introduce fresh air into the evaporation module to blow out the dry salt particles to form dry salt aerosol; The detection module is respectively connected to the evaporation module, the ventilation module and the atomization module, and is used to detect the temperature of the evaporation module, as well as the concentration and dryness of the dry salt aerosol, and the input voltage of the atomization sheet; The control module receives the data from the detection module and adjusts the atomization rate of the atomization module, the temperature of the evaporation module, and the ventilation flow rate of the ventilation module.

[0021] Specifically, the atomization rate is controlled by the voltage input to the atomization sheet; the temperature of the evaporation module is controlled by the voltage input to the evaporation module; the ventilation flow rate is controlled by the voltage input to the ventilation module.

[0022] Specifically, the detection module includes a voltage feedback module, a flow sensor, a temperature sensor, a particle size sensor, and a dryness sensor; The power supply feedback module is used to feedback the input voltages of the atomization sheet, the ventilation module, and the heating component in real time; The flow sensor is used to detect the ventilation flow rate in real time; The temperature sensor detects the temperature of the heating component in real time; The particle size sensor is used to detect the particle size distribution and concentration of the salt particles; The dryness sensor is used to detect the dryness of the salt particles formed after passing through the evaporation chamber.

[0023] Advantages of the present invention: 1. After the control module obtains the concentration deviation and working parameters, it can automatically adjust the working parameters so that the actual concentration is always consistent with the set concentration, improving the concentration control accuracy of the dry salt aerosol.

[0024] 2. Through the present invention, stepless adjustment of the concentration of dry salt aerosol can be achieved. There is no need to manually adjust the gear. Only by giving the concentration set value, the corresponding adjustment of the working parameters can be completed, solving the problem that the concentration gradient of the dry salt aerosol corresponding to the adjustment gear changes. When the actual concentration deviates, the actual concentration cannot be made consistent with the set concentration by shifting gears. Description of the Drawings

[0025] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. The accompanying 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 to the present invention. For those skilled in the art, without creative efforts, other accompanying drawings can also be obtained according to the accompanying drawings.

[0026] Figure 1 This is the automatic control flowchart of the dry salt aerosol concentration of the present invention.

[0027] Figure 2 This is the schematic diagram of the automatic control system for the dry salt aerosol concentration of the present invention. Specific embodiments

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0029] Referring to Figure 1 As shown, an embodiment of an automatic control method for the dry salt aerosol concentration based on a salt solution includes the following steps: S1 Obtain the set target value parameter C of the dry salt aerosol concentration 设定 , the current dry salt aerosol concentration parameter C 实际 and the first working parameter, the second working parameter, and the third working parameter of the current dry salt aerosol generation device; S2 Obtain the difference △C between the target value C of the dry salt aerosol concentration 设定 and the current actual value C 实际 of the dry salt aerosol concentration; S3 Keep the first working parameter and the second working parameter unchanged, and calculate the unit change amount of the dry salt aerosol concentration when the third working parameter changes; S4 Calculate the total change amount that the third working parameter needs to be adjusted according to the difference △C between the target value C of the dry salt aerosol concentration 设定 and the actual concentration value C 实际 of the dry salt aerosol concentration and the unit change amount of the dry salt aerosol concentration; S5 Adjust according to the total change amount that the third working parameter needs to be adjusted to adjust the third working parameter to the target value; S6 Obtain the dry salt aerosol concentration parameter C 调 after the adjustment of the third working parameter; If C 调 = C 设定, then it runs according to the adjusted parameters; If C 调 ≠ C 设定 , then the third working parameter is adjusted twice until C 调 = C 设定 .

[0030] In this embodiment, the first working parameter, the second working parameter, and the third working parameter of the dry salt aerosol generating device respectively correspond to the current salt solution concentration parameter C 溶液 , the current atomization rate parameter V, and the current ventilation flow rate N; The current atomization rate parameter V is calculated from the atomization sheet parameter and the atomization sheet operating frequency; The current salt solution concentration parameter C 溶液 is obtained when preparing the solution; The ventilation flow rate N is obtained through a flow sensor; The atomization sheet operating frequency is controlled by the atomization sheet input voltage, and the fan speed is controlled by the ventilation module input voltage.

[0031] The meaning of the atomization rate is the amount of salt solution atomized into salt mist by the atomization sheet per unit time, that is, the salt mist generation rate.

[0032] In this embodiment, during the normal operation of the dry salt aerosol therapeutic apparatus, adjusting both the atomization rate V and the ventilation flow rate N is achieved by adjusting the input voltage. Therefore, adjusting the atomization rate V to the target value V1 means adjusting the atomization input voltage U 雾化 to the target value U1; adjusting the ventilation flow rate N to the target value N1 means adjusting the ventilation input voltage U 通风 to the target value U2; among them, the atomization rate and the salt solution concentration are adjusted according to a proportional function, and the ventilation flow rate is adjusted according to an inverse proportional function.

[0033] In this embodiment, a microporous atomization sheet is used. The current micropore diameter and the number of micropores of the atomization sheet are determined values. The actual value of the dry salt aerosol concentration is obtained through a concentration sensor; the current atomization rate is controlled by the input voltage of the atomization sheet; If the target value C 设定 of the dry salt aerosol concentration and the current actual value C 实际 have a difference △C = 0, then continue with the current operating parameters; if the difference △C between the set target value C of the dry salt aerosol concentration and the actual value C actual is not equal to 0, then adjust the operating parameters.

[0034] Within the normal working voltage range, the operating frequency of the microporous atomization sheet is positively correlated with the input working voltage. When the pore diameter and the number of micropores of the microporous atomization sheet are determined, the atomization rate is positively correlated with the input voltage of the atomization sheet and has a proportional function relationship. The simplified formula is: Where: V is the atomization rate, U is the working voltage, and k is the relationship coefficient.

[0035] k is related to the pore diameter of the microporous atomization sheet, the number of micropores, and the solution viscosity.

[0036] In a further embodiment, an ideal relationship formula among the dry salt aerosol concentration, the salt solution concentration, the atomization rate, and the ventilation flow rate is constructed: Where: C 溶胶 is the dry salt aerosol concentration, in μg / m 3 ; V is the atomization rate, in μg / min; N is the ventilation flow rate, in m 3 / min; C 溶液 is the salt solution concentration, in %, representing the percentage of the mass of the salt in the total mass of the salt solution; V·C 溶液 represents the dry salt particle generation rate; In a further embodiment, in step S3, the ventilation flow rate and the salt solution concentration are set as fixed values, and only the atomization rate parameter is changed. According to the current salt solution concentration C 溶液 calculate the change amount of the dry salt particle generation rate when the atomization rate V changes to V1, and then calculate the unit change amount of the dry salt aerosol concentration according to the current ventilation flow rate N.

[0037] In a further embodiment, the unit change amount of the dry salt aerosol concentration is converted into the change amount of the dry salt aerosol concentration when the input working voltage of the atomization sheet changes by 1 volt.

[0038] In a further embodiment, the difference between the target value and the actual value of the dry salt aerosol concentration is the total change amount that the dry salt aerosol concentration needs to make; according to the total change amount of the dry salt aerosol concentration and the unit change amount of the dry salt aerosol concentration, calculate the total change amount that the atomization rate needs to make according to the proportional function, and convert it into the total change amount of the input voltage of the atomization sheet.

[0039] In a further embodiment, judge the difference between the target value and the actual value of the dry salt aerosol concentration. If the difference is greater than 0, it means that the actual concentration is less than the target concentration, and increase the total change amount that the atomization rate needs to make, that is, the total change amount that the input voltage of the atomization sheet needs to be increased; If the difference is less than 0, it means that the actual concentration is greater than the target concentration, and decrease the total change amount that the atomization rate needs to make, that is, the total change amount that the input voltage of the atomization sheet needs to be decreased.

[0040] After the adjustment of the input voltage of the atomization sheet is completed, detect the concentration of the dry salt aerosol. If it is equal to the set concentration, run according to the adjusted parameters; If it is not equal to the set concentration, repeat the calculation sequence of the first adjustment to continue the adjustment until the actual concentration of the dry salt aerosol is equal to the set concentration.

[0041] In another embodiment, the atomization rate and the salt solution concentration are set as fixed values, and only the ventilation flow rate parameter is changed. According to the current salt solution concentration and the atomization rate, calculate the unit change amount of the dry salt aerosol concentration when the ventilation flow rate changes from N to N1. Then, according to the conversion between the voltage and the fan speed, calculate the unit change amount of the dry salt aerosol concentration when the input working voltage of the fan changes. Then, according to the inverse proportional function, calculate the total change amount of the fan input voltage required to achieve the total change amount of the dry salt aerosol concentration. The control module controls the fan to input the required total change amount of the working voltage. After the voltage adjustment is completed, detect the concentration of the dry salt aerosol, and then make a comparison judgment on the next action according to the detected concentration value and the set value.

[0042] In yet another embodiment, the atomization rate and the ventilation rate are set as fixed values, and only the salt solution concentration parameter is changed. According to the current atomization rate and the ventilation flow rate, calculate the unit change amount of the dry salt aerosol concentration when the salt solution concentration changes. Then, according to the direct proportional function, calculate the total change amount of the salt solution concentration required to achieve the total change amount of the dry salt aerosol concentration. After replacing the salt solution with the target concentration or mixing different concentration salt solutions to reach the salt solution with the target concentration, detect the concentration of the generated dry salt aerosol, and then make a comparison judgment on the next action according to the detected concentration value and the set value.

[0043] In a further embodiment, when the total change amount required to increase the atomization rate is made, it is necessary to detect the dryness of the dry salt aerosol.

[0044] When the atomization rate increases, the atomization amount per unit time increases, and the moisture entering the evaporation chamber increases, which will affect the evaporation and drying degree of the moisture in the salt mist by the evaporation module.

[0045] Specifically, if it is detected that the dryness meets the preset requirements, operate according to the adjusted parameters; If it is detected that the dryness does not meet the preset requirements, determine whether the current drying temperature reaches the upper limit of the set temperature threshold; If it has not reached the upper limit, increase the drying temperature to improve the drying degree; If the upper limit of the set threshold of the drying temperature has been reached, keep the drying temperature unchanged, keep the input voltage of the ventilation module unchanged, increase the salt solution concentration, and at the same time reduce the input voltage of the atomization sheet to keep the dry salt aerosol concentration unchanged so that the dryness meets the preset requirements.

[0046] In this embodiment, the atomization rate is controlled by the voltage input to the atomization sheet; the evaporation temperature is controlled by the voltage input to the evaporation module; the ventilation flow rate is controlled by the voltage input to the ventilation module.

[0047] In the present invention, the adjustment priority of the three parameters affecting the concentration is as follows: First, adjust the input voltage of the atomizing sheet, keep the input voltage of the ventilation module and the salt solution concentration unchanged, adjust the atomizing rate by changing the working frequency of the atomizing sheet, and then adjust the dry salt aerosol concentration; When the input voltage of the atomizing sheet reaches the limit of the set threshold, keep the input voltage and the input voltage of the ventilation module unchanged, adjust the salt solution concentration, and then adjust the dry salt aerosol concentration; When the input voltage of the atomizing sheet and the salt solution concentration both reach the set threshold, keep the input voltage of the atomizing sheet and the salt solution concentration unchanged, and adjust the ventilation flow rate to adjust the dry salt aerosol concentration.

[0048] In a further embodiment, the control module records the working parameters corresponding to the current dry salt aerosol concentration. When the concentration is set to the recorded concentration again, the recorded working parameters are read and the operation is performed according to these parameters.

[0049] Referring to Figure 2 As shown, an embodiment of an automatic control system for the dry salt aerosol concentration based on a salt solution is used to implement the above automatic control method, and includes an atomizing module, an evaporation module, a ventilation module, a detection module, and a control module; The atomizing module is used to atomize the salt solution into salt mist; The evaporation module includes an evaporation chamber and a heating component for heating the evaporation chamber. The evaporation chamber is communicated with the atomizing module and is used to evaporate the moisture in the salt mist to form dry salt particles; The ventilation module is communicated with the evaporation module and is used to introduce fresh air into the evaporation module, accelerate the evaporation and drying of the salt mist into salt particles, and blow out the dried salt particles to form dry salt aerosol; The detection module is connected to the evaporation module and is used to detect the temperature of the evaporation module, as well as the concentration and dryness of the dry salt aerosol; The control module receives the data of the detection module and adjusts the atomizing rate of the atomizing module, the temperature of the evaporation module, and the ventilation flow rate of the ventilation module.

[0050] Specifically, the detection module includes a voltage feedback module, a flow sensor, a temperature sensor, a particle size sensor, and a dryness sensor; The power supply feedback module is used to feedback the input voltages of the atomizing sheet, the ventilation module, and the heating component in real time; The flow sensor is used to detect the ventilation flow rate in real time; The temperature sensor detects the temperature of the heating component in real time; The particle size sensor is used to detect the particle size distribution and concentration of the salt particles; The dryness sensor is used to detect the dryness of the salt particles formed after passing through the evaporation chamber.

[0051] In the present invention, solid salt particles can be added to the salt solution in a certain proportion to increase the salt solution concentration, or a salt solution with a higher concentration can be mixed with the current salt solution in a certain proportion to increase the salt solution concentration. Alternatively, the salt solution with the same concentration as the target concentration value can be directly replaced. A lower concentration salt solution or water can be added to the currently used salt solution in a certain proportion and mixed to reduce the current salt solution concentration, or the salt solution with the same concentration as the target concentration value can be directly replaced.

[0052] The addition of salt solutions or water with different concentrations can be completed by a control module controlling a suction pump.

[0053] It should be noted that any two of the three parameters of the ventilation flow rate parameter, the atomization rate parameter, and the salt solution concentration parameter can be adjusted simultaneously, or these three parameters can be adjusted simultaneously to achieve the adjustment of the dry salt aerosol concentration.

[0054] In the present invention, the salt refers to sodium chloride; the salt solution refers to a solution formed by dissolving sodium chloride in water, which may contain trace elements such as magnesium and potassium; the meanings of dry salt aerosol, rock salt aerosol, and dry salt aerosol are the same, and they are all solid sols formed by sodium chloride particles suspended in the air.

[0055] Although the preferred embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present invention, those of ordinary skill in the art can make many specific transformations in form without departing from the spirit of the invention and the scope protected by the claims, and these all fall within the protection scope of the present invention.

Claims

1. A method for automatically controlling the concentration of dry salt aerosol based on a salt solution, characterized in that: The following steps are involved: S1: obtaining a set target value of dry salt aerosol concentration, a current dry salt aerosol concentration detection value, and a current working parameter of a dry salt aerosol generating device, wherein the current working parameter of the dry salt aerosol generating device includes: a first working parameter, a second working parameter, and a third working parameter; S2 obtains the difference between the set target value of dry salt aerosol concentration and the current actual detection value according to the acquired parameters; S3 keeps the first working parameter and the second working parameter unchanged, and calculates the unit change of the dry salt aerosol concentration when the third working parameter changes; S4 calculates the total change amount of the third working parameter that needs to be adjusted according to the difference between the set target value of the dry salt aerosol concentration and the actual detected value of the concentration and the unit change amount of the dry salt aerosol concentration; S5 controls the voltage output according to the total change amount of the third operating parameter to be adjusted so that the third operating parameter is adjusted to a target value; S6 obtains the dry salt aerosol concentration detection value after the third working parameter is adjusted, and performs the following logic: If the adjusted dry salt aerosol concentration detection value is consistent with the set target value of dry salt aerosol concentration, the system will operate according to the adjusted parameters; If the adjusted dry salt aerosol concentration detection value does not match the set target value of the dry salt aerosol concentration, the third working parameter is adjusted a second time until the adjusted dry salt aerosol concentration detection value matches the set target value of the dry salt aerosol concentration.

2. The automatic control method for dry salt aerosol concentration based on saline solution according to claim 1, characterized in that: In the step S1, the actual value of the current dry salt aerosol concentration is obtained by a concentration sensor; the first working parameter, the second working parameter and the third working parameter are different from each other; the first working parameter, the second working parameter and the third working parameter respectively correspond to any one of the current salt solution concentration parameter, the current atomization rate parameter and the current ventilation flow rate; The current atomization rate parameter is calculated by atomization sheet parameters and atomization sheet operating frequency, or is obtained by sensor detection; The current salt solution concentration parameter is obtained when preparing the solution or obtained through a concentration meter; The ventilation flow rate N is calculated by the fan speed and the rated output of the fan of the ventilation module, or obtained by a flow sensor; The operating frequency of the atomizing plate is controlled by the input voltage of the atomizing plate, and the speed of the fan is controlled by the input voltage of the ventilation module.

3. The automatic control method for dry salt aerosol concentration based on saline solution according to claim 2, characterized in that: The atomizing sheet comprises: A microporous atomizer sheet, wherein the parameters of the atomizer sheet include microporous aperture and microporous quantity, and the atomization rate increases with the increase of microporous aperture, microporous quantity and atomization frequency; Ultrasonic atomization sheet, the atomization rate is obtained by the atomization frequency, and the atomization rate increases as the atomization frequency increases.

4. The automatic control method of dry salt aerosol concentration based on saline solution according to claim 1, characterized in that: In step S2, if the difference is 0, the current operating parameters are continued; if the difference is not 0, the operating parameters are adjusted.

5. The automatic control method of dry salt aerosol concentration based on salt solution according to claim 2, characterized in that: In step S3, the specific calculation steps of the unit change of dry salt aerosol concentration are: S301 constructs the relationship between dry salt aerosol concentration and salt solution concentration, atomization rate, and ventilation flow rate: 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 V·C is the concentration of the salt solution, in %, which means the mass of salt accounts for the percentage of the total mass of the salt solution. 溶液 Indicates the rate of dry salt particle generation; S302: If only the atomization rate parameter is changed, the change in the dry salt particle generation rate when the atomization rate changes is calculated according to the current salt solution concentration, and then the unit change in the dry salt aerosol concentration is calculated according to the current ventilation flow rate; If only the salt solution concentration parameter is changed, the change in the dry salt particle generation rate when the salt solution concentration changes is calculated based on the current atomization rate, and then the unit change in the dry salt aerosol concentration is calculated based on the current ventilation flow rate; If only the ventilation flow parameter is changed, the unit change in dry salt aerosol concentration is calculated based on the current atomization rate and salt solution concentration.

6. The automatic control method of dry salt aerosol concentration based on salt solution according to claim 1, characterized in that: In step S5, the specific logic of adjustment is: If the difference is greater than 0, it means that the actual concentration is less than the target concentration, and the total change required to increase the atomization rate parameter according to the proportional function; or the total change required to increase the salt solution concentration parameter according to the proportional function; or the total change required to reduce the ventilation flow parameter according to the inverse function; If the difference is less than 0, it means that the actual concentration is greater than the target concentration, and the total change required to reduce the atomization rate parameter according to the proportional function; or the total change required to reduce the salt solution concentration parameter according to the proportional function; or the total change required to increase the ventilation flow parameter according to the inverse function; The atomization rate is increased by increasing the input voltage of the atomization plate; the atomization rate is reduced by reducing the input voltage of the atomization plate; The ventilation flow rate is increased by increasing the input voltage of the ventilation module, and the ventilation flow rate is reduced by reducing the input voltage of the ventilation module; The concentration of the salt solution is increased by adding a high-concentration salt solution or replacing it with a high-concentration salt solution; the concentration of the salt solution is reduced by adding water for dilution or replacing it with a low-concentration salt solution; The priority of adjusting the working parameters is: atomization rate> salt solution concentration> ventilation flow rate.

7. The automatic control method of dry salt aerosol concentration based on salt solution according to claim 1, characterized in that: In step S6, the specific logic of performing secondary adjustment is: repeating steps S1-S5 until the actual detected concentration is equal to the target concentration value.

8. The automatic control method for dry salt aerosol concentration based on a salt solution according to any one of claims 1 to 7, characterized in that: When the total change required to increase the atomization rate is made, the dryness of the dry salt aerosol needs to be detected; If the dryness meets the preset requirements, the machine will be operated according to the adjusted parameters; If the dryness does not meet the preset requirements, increase the drying temperature; The increase in drying temperature must meet the following logic: If the drying temperature reaches the set upper limit threshold, the drying temperature and salt solution concentration are kept unchanged, and the input voltage of the atomizer and the input voltage of the ventilation module are reduced simultaneously; Or, keep the drying temperature constant and the ventilation module input voltage constant, increase the salt solution concentration and reduce the atomizer input voltage.

9. The automatic control method of dry salt aerosol concentration based on salt solution according to claim 8, characterized in that: The dryness is obtained by measuring the moisture content by a weight loss method or a moisture meter, and the preset requirement for the dryness is: moisture content ≤ 1%.

10. An automatic control system for dry salt aerosol concentration based on salt solution, capable of implementing the control method according to any one of claims 1 to 9, characterized in that: It includes an atomization module, an evaporation module, a ventilation module, a detection module and a control module; An atomization module, used 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 communicated with the atomization module and is used for evaporating water in the salt mist to form dry salt particles; The ventilation module is connected to the evaporation module, and is used to introduce fresh air into the evaporation module to accelerate the evaporation of the salt mist into salt particles, and blow out the dried salt particles to form dry salt aerosol; The detection module is connected to the evaporation module and is used to detect the temperature of the evaporation module and the concentration and dryness of the dry salt aerosol; The control module receives the data from the detection module and adjusts the atomization rate of the atomization module, the temperature of the evaporation module, and the ventilation flow of the ventilation module.

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