A method and a machine for atomizing a drug in animal breeding

Abstract

The present application relates to the technical field of atomization, in particular to a method and an atomizer for atomizing medicine in animal breeding, the method comprising: determining a target application amount of medicine liquid, a target droplet size grade, a target atomization amount per unit time and a target liquid supply flow rate according to the application requirements of the animal breeding space, and establishing a candidate ultrasonic working position set corresponding to different resonance working points; introducing the medicine liquid and the compressed carrier gas cooled to an air-liquid mixed ultrasonic atomization nozzle, selecting an ultrasonic working position, and forming a medicine aerosol below the upper limit of the stable temperature of the medicine; collecting the actual liquid supply flow rate, adjusting the duty cycle of the pulse width modulation signal of the liquid supply pump according to the liquid supply deviation and its change trend; heating, vaporizing and cooling the suspension synergistic medium to form a carrier aerosol; and determining the mixed air supply parameters according to the actual liquid supply flow rate, the ultrasonic working position and the vaporization amount per unit time, so that the two kinds of aerosols form a composite suspended mist in the mixing bin and are delivered to the animal breeding space.

Description

Technical Field

[0001] This invention relates to the field of atomization technology, and more particularly to a method and atomizer for atomizing drugs in animal husbandry. Background Technology

[0002] With the development of large-scale animal farming, using drugs to improve the indoor air environment and regulate the balance of microbial communities has gradually become an important technical means of animal husbandry management. Current drug application methods mainly include drinking water, mixing with feed, spraying, and ordinary atomization. Among these, spraying produces larger droplet sizes, easily causing localized humidity increases and poor spatial coverage uniformity. While ordinary ultrasonic atomization can form finer droplets, it is easily affected by factors such as the stability of the liquid supply, atomization conditions, and temperature rise during continuous operation, leading to fluctuations in droplet size and atomization volume, affecting the survival rate of active bacteria. At the same time, the suspension time of droplets in the farming space is limited, and the spatial diffusion capacity is insufficient, making it difficult to simultaneously meet the requirements of maintaining drug activity, continuous suspension, and uniform application. Therefore, how to achieve stable atomization of drugs while maintaining their activity, and improve spatial suspension effects and application consistency, has become a pressing technical problem to be solved in the animal husbandry field. Summary of the Invention

[0003] In view of the above technical problems, the present invention provides a method and machine for atomizing drugs in animal breeding, so as to solve the technical problems of insufficient liquid supply stability in the existing drug atomization process, difficulty in matching ultrasonic atomization conditions with different application needs, easy decrease in bacterial activity caused by atomization process, short droplet suspension time, and unstable spatial coverage effect.

[0004] Other features and advantages of the invention will become apparent from the following detailed description, or may be learned in part by practice of the invention.

[0005] According to one aspect of the present invention, a method for nebulizing drugs in animal husbandry is provided, comprising the following steps: Based on the application requirements of the animal breeding space, the target application amount, target atomization state, and target liquid supply flow rate of the drug solution are determined. The target atomization state includes the target droplet size and the target atomization amount per unit time. A set of candidate ultrasonic working positions for the gas-liquid mixing ultrasonic atomizing nozzle is established. The candidate ultrasonic working positions correspond to different resonant working points. The drug solution is delivered from the storage container to the gas-liquid mixing ultrasonic atomizing nozzle via a liquid supply pump. Cooled compressed carrier gas is introduced into the gas-liquid mixing ultrasonic atomizing nozzle. A candidate ultrasonic working position is selected from the candidate ultrasonic working position set according to the target atomization state. The gas-liquid mixing ultrasonic atomizing nozzle is controlled according to the selected ultrasonic working position to atomize the drug solution into a drug aerosol under the condition that the drug temperature does not exceed the preset drug stability temperature upper limit. During the operation of the liquid supply pump, the actual liquid supply flow rate of the drug solution is collected. The liquid supply deviation and the trend of the liquid supply deviation are determined based on the target liquid supply flow rate and the actual liquid supply flow rate. When the liquid supply deviation and the trend of the liquid supply deviation meet the preset adjustment conditions, the duty cycle of the pulse width modulation signal used to drive the liquid supply pump is corrected so that the actual liquid supply flow rate is maintained within the preset flow rate allowable range determined based on the target liquid supply flow rate. A suspension synergistic medium is provided, which is then heated and vaporized to obtain a vaporization product. During the process of transporting the vaporization product to the mixing chamber, the vaporization product is cooled to form a mist aerosol with a temperature lower than the preset drug stability temperature upper limit. The drug aerosol and the mist-carrying aerosol are respectively introduced into the mixing chamber. The mixing air supply parameters are determined according to the actual liquid supply flow rate, the selected ultrasonic working level, and the unit time vaporization rate of the suspension synergist. Air is supplied to the mixing chamber according to the mixing air supply parameters, so that the drug aerosol and the mist-carrying aerosol are mixed in the mixing chamber to form a composite suspended mist, and the composite suspended mist is delivered to the animal breeding space.

[0006] Furthermore, the target liquid supply flow rate is determined by allocating the target application amount according to the atomization operation duration and the number of gas-liquid mixing ultrasonic atomizing nozzles. Before and during the atomization operation, the liquid level in the storage container, the liquid supply pressure in the supply pipeline, the temperature of the compressed carrier gas, and the temperature of the drug solution are collected. When the liquid level in the reservoir is lower than the preset lower limit, the liquid supply pressure exceeds the preset allowable pressure range, the temperature of the compressed carrier gas reaches the preset upper limit of the drug stability temperature, or the temperature of the drug liquid reaches the preset upper limit of the drug stability temperature, the operation of the liquid supply pump and the gas-liquid mixing ultrasonic atomizing nozzle is stopped, and the supply of compressed carrier gas is cut off.

[0007] Furthermore, according to multiple continuously set sampling cycles, a pulse sequence corresponding to the liquid supply flow rate is collected by a flow detection device installed in the liquid supply pipeline between the liquid supply pump and the gas-liquid mixing ultrasonic atomizing nozzle; The pulse frequency of the pulse sequence within each sampling period is statistically analyzed, and the pulse frequency is converted into the actual liquid supply flow rate according to a pre-calibrated flow rate conversion relationship; The liquid supply volume for each sampling period is determined based on the actual liquid supply flow rate and the corresponding sampling duration within each sampling period. The liquid supply volumes for each sampling period are then summed to obtain the cumulative supply volume of the drug solution. The target liquid supply flow rate is adjusted based on the difference between the target application rate and the cumulative supply of the drug solution, as well as the remaining atomization operation time.

[0008] Furthermore, the liquid supply deviation is the difference obtained by subtracting the actual liquid supply flow rate from the target liquid supply flow rate, and the trend of the liquid supply deviation is determined based on the liquid supply deviation obtained from two adjacent samplings; The preset adjustment conditions include a first adjustment condition and a second adjustment condition. The first adjustment condition is that the actual liquid supply flow rate exceeds the preset flow rate allowable range. The second adjustment condition is that the actual liquid supply flow rate is within the preset flow rate allowable range and the absolute value of the liquid supply deviation continuously increases. When the first adjustment condition or the second adjustment condition is met, the duty cycle is increased when the actual liquid supply flow rate is lower than the target liquid supply flow rate, and the duty cycle is decreased when the actual liquid supply flow rate is higher than the target liquid supply flow rate. The correction range of the duty cycle is determined according to the absolute value of the liquid supply deviation and the trend of the liquid supply deviation. When the actual liquid supply flow rate is within the preset flow rate allowable range and the absolute value of the liquid supply deviation does not increase, the current duty cycle is maintained.

[0009] Furthermore, the liquid supply deviation and the trend of liquid supply deviation are used as input for rule reasoning, and the incremental correction amounts of the proportional adjustment parameter, integral adjustment parameter and derivative adjustment parameter are determined according to the preset adjustment rules. The proportional control parameter, integral control parameter, and derivative control parameter are updated according to the incremental correction amount. The liquid supply control quantity is generated according to the updated proportional control parameter, integral control parameter, and derivative control parameter, and the liquid supply control quantity is converted into the duty cycle of the pulse width modulation signal. Before atomization, multiple candidate parameter groups are established, consisting of basic values ​​for proportional, integral, and derivative adjustment parameters. Liquid supply is adjusted using each candidate parameter group. Based on the cumulative liquid supply deviation, flow overshoot, adjustment duration, and steady-state flow fluctuation, the candidate parameter groups are compared according to a preset evaluation priority order. The candidate parameter group with the higher comparison result is retained for the next round of parameter adjustment until the preset number of iterations is met. The finally retained candidate parameter group is used as the basic value for the proportional, integral, and derivative adjustment parameters.

[0010] Furthermore, the candidate ultrasonic working level set is pre-stored in the controller, which includes multiple candidate ultrasonic working levels, each of which corresponds to a preset driving frequency, preset input power, droplet size level, and atomization amount level per unit time.

[0011] Furthermore, the step of selecting the selected ultrasound working level includes: Based on the target droplet size level, the corresponding candidate ultrasonic working level is selected from the candidate ultrasonic working level set, and based on the target atomization amount per unit time, the selected ultrasonic working level is determined from the selected candidate ultrasonic working level. When there are multiple candidate ultrasonic working levels selected, the candidate ultrasonic working level whose corresponding atomization rate per unit time is closest to the target atomization rate per unit time is determined as the selected ultrasonic working level. When there are no candidate ultrasonic working levels that simultaneously correspond to the target droplet size level and the target atomization amount per unit time, the selected ultrasonic working level is determined from the set of candidate ultrasonic working levels according to preset droplet size priority conditions or atomization amount priority conditions.

[0012] Furthermore, the gas-liquid mixing ultrasonic atomizing nozzle is driven according to the preset driving frequency and preset input power corresponding to the selected ultrasonic working level, and the temperature of the drug liquid is collected during atomization; When the temperature of the drug solution reaches the preset power reduction temperature threshold, the preset driving frequency remains unchanged and the input power of the gas-liquid mixing ultrasonic atomizing nozzle is reduced. When the temperature of the drug solution reaches the preset upper limit of the stable drug temperature, the operation of the gas-liquid mixing ultrasonic atomizing nozzle is stopped. When the temperature of the drug solution drops to a preset recovery temperature threshold, the operation of the gas-liquid mixed ultrasonic atomizing nozzle is restored according to the selected ultrasonic working level. The preset recovery temperature threshold is lower than the preset power reduction temperature threshold.

[0013] Furthermore, the suspending synergistic medium is a medium compatible with the drug solution and does not affect the stability of the drug solution; the method further includes: Select the gasification working level according to the required gasification volume per unit time, deliver the suspended enhancement medium to the heating gasification chamber, and heat and gasify the suspended enhancement medium according to the supply rate and heating power corresponding to the gasification working level to form gasification products. The vaporized product is conveyed to the mixing chamber via a conveying channel. A cooling airflow is introduced into the conveying channel, and the flow rate of the cooling airflow is adjusted according to the temperature of the vaporized product, so that the vaporized product forms a mist aerosol with a temperature lower than the preset drug stability temperature upper limit before entering the mixing chamber. The drug aerosol and the mist-carrying aerosol are introduced into the mixing chamber through intersecting mist inlet channels. The mixing air supply parameters are selected according to the actual liquid supply flow rate, the selected ultrasonic working level, and the vaporization working level. Air is supplied to the mixing chamber according to the mixing air supply level, so that the drug aerosol and the mist-carrying aerosol can fully contact each other in the mixing chamber to form the composite suspended mist.

[0014] According to a second aspect of the present invention, a nebulizer is provided, comprising a drug tank, a liquid pump, an air compressor, a two-fluid ultrasonic nozzle, a synergist vaporization device, a mixing chamber, a fan, and a controller. The drug tank is connected to the two-fluid ultrasonic nozzle via the liquid pump. The air compressor is connected to the two-fluid ultrasonic nozzle. The two-fluid ultrasonic nozzle and the synergist vaporization device are respectively connected to the mixing chamber. The fan is used to discharge the mixed mist formed in the mixing chamber. The controller is connected to the liquid pump, the air compressor, the two-fluid ultrasonic nozzle, the synergist vaporization device, and the fan. The nebulizer is used to perform the above-described drug nebulization method in animal husbandry.

[0015] The technical solution of the present invention has the following beneficial effects: Compared with existing technologies, this invention combines dynamic adjustment of liquid supply flow rate, temperature control for drug activity protection, composite suspension enhancing medium, and mixed air supply control to enable the drug solution to form a stable atomized state under suitable operating conditions. This effectively reduces the impact of liquid supply fluctuations on droplet size and atomization volume, and improves the consistency of atomization output under different operating conditions. At the same time, by colliding and combining drug aerosols with carrier aerosols to form composite suspended mist, the suspension and diffusion capabilities of droplets in the breeding space are enhanced while maintaining drug activity. This improves the uniformity of spatial coverage and the duration of action, reduces drug waste, and reduces humidity fluctuations in the breeding environment, which is beneficial for improving the air environment of animal breeding spaces and enhancing drug application effects. Attached Figure Description

[0016] Figure 1 This is a flowchart illustrating a drug atomization method in animal husbandry, as described in the embodiments of this specification. Figure 2 This is a structural block diagram of an atomizer as described in one of the embodiments of this specification. Detailed Implementation

[0017] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make the invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a full understanding of embodiments of the invention. However, those skilled in the art will recognize that the technical solutions of the invention may be practiced with one or more of these specific details omitted, or other methods, components, apparatus, steps, etc., may be employed. In other instances, well-known technical solutions are not shown or described in detail to avoid obscuring various aspects of the invention.

[0018] Furthermore, the accompanying drawings are merely illustrative of the invention. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted. Some block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0019] Example 1 This invention provides a method for atomizing drugs in animal husbandry. (Refer to...) Figure 1 The diagram shown is a flowchart illustrating a method for nebulizing drugs in animal husbandry according to an embodiment of the present invention. Specifically, the method may include the following steps S101-S105: In step S101, based on the application requirements of the animal breeding space, the target application amount, target atomization state, and target liquid supply flow rate of the drug liquid are determined. The target atomization state includes the target droplet size level and the target atomization amount per unit time. A set of candidate ultrasonic working levels for the gas-liquid mixing ultrasonic atomizing nozzle is established, and the candidate ultrasonic working levels correspond to different resonant working points.

[0020] The choice of medication solution depends on the intended use in the animal husbandry environment. For example, it can be a microbial preparation containing probiotics, a respiratory treatment solution, or an environmental regulator solution. The probiotic solution may include beneficial microorganisms such as lactic acid bacteria, Bacillus, and yeast. It is released into the animal husbandry environment via atomization to regulate the microbial composition, reduce the proliferation of harmful bacteria, and decrease odorous gases such as ammonia and hydrogen sulfide produced from feces and bedding, thereby improving the quality of the husbandry environment.

[0021] For respiratory infections, tracheal and bronchial inflammation, and other conditions that are common in poultry farming, liquid medications can be formulations containing anti-infective, anti-inflammatory, expectorant, or respiratory repair-supporting components. These medications, after being atomized, form drug aerosols of suitable particle size, which can enter the poultry's respiratory system with the air, allowing the drug components to more easily reach the respiratory mucosa and improve problems such as increased mucus secretion, sputum accumulation, and airway obstruction caused by inflammation.

[0022] When the drug solution contains live microorganisms such as probiotics, the preset upper limit of the drug stability temperature is determined based on the conditions for maintaining microbial activity, in order to reduce the loss of activity caused by temperature rise during ultrasonic nebulization. When the drug solution is used for the prevention and treatment of respiratory diseases, the preset upper limit of the drug stability temperature is determined based on the stability range of the drug's active ingredients, in order to ensure the stability of the drug efficacy before and after nebulization. Different types of drug solutions can be adapted to different animal husbandry spaces and application needs by adjusting the target droplet size, target atomization rate per unit time, and target liquid supply flow rate.

[0023] The application requirements for animal husbandry space can be determined based on space volume, animal species, stocking density, effective application concentration of the drug solution, predetermined operation duration, and environmental ventilation conditions. The target droplet size class is used to define the particle size range of the drug aerosol, and the target atomization rate per unit time is used to define the amount of drug aerosol formed per unit time. The candidate ultrasonic operating settings can be pre-established and stored during equipment design or factory commissioning, and directly called by the controller during actual atomization operations, eliminating the need for user frequency scanning or on-site droplet size measurement. Each candidate ultrasonic operating setting corresponds to a stable vibration state of the gas-liquid mixed ultrasonic atomizing nozzle, and the corresponding drive frequency and input power can be configured. During ultrasonic atomization, when capillary wave action is dominant, the capillary wave wavelength and average droplet size can be expressed as: ; ; In the formula, The capillary wavelength is the wavelength of the drug solution surface. The surface tension of the drug solution, The density of the drug solution, Where D is the driving frequency and D is the average droplet size. This relationship is used to illustrate the trend of driving frequency and droplet size variation; the specific gear setting is still based on the pre-stored gear parameters.

[0024] In step S102, the drug liquid is delivered from the storage container to the gas-liquid mixing ultrasonic atomizing nozzle via a liquid supply pump. The cooled compressed carrier gas is introduced into the gas-liquid mixing ultrasonic atomizing nozzle. A candidate ultrasonic working position is selected from the candidate ultrasonic working position set according to the target atomization state. The gas-liquid mixing ultrasonic atomizing nozzle is controlled according to the selected ultrasonic working position to atomize the drug liquid into drug aerosol under the condition that it does not exceed the preset drug stable temperature upper limit.

[0025] The gas-liquid mixing ultrasonic atomizing nozzle is a nozzle capable of simultaneously receiving liquid drug and compressed carrier gas, and utilizing ultrasonic vibration and airflow to synergistically form droplets. After entering the nozzle, the liquid drug is subjected to ultrasonic vibration, creating surface disturbance and cavitation. The compressed carrier gas assists in breaking up and directionally carrying away the formed droplets, reducing droplet accumulation near the nozzle exit. The compressed carrier gas is cooled before entering the nozzle to remove heat generated during nozzle operation and gas compression, reducing the local temperature rise of the liquid drug. The preset upper limit of the stable drug temperature can be determined based on the heat resistance characteristics of the active ingredients in the liquid drug, ensuring that the liquid drug remains within the allowable temperature range throughout the process of delivery, atomization, and discharge. The selected ultrasonic operating level and corresponding drive frequency primarily affect the droplet size, while the input power primarily affects the ultrasonic vibration intensity and the atomization rate per unit time; both together constitute the operating conditions of the gas-liquid mixing ultrasonic atomizing nozzle.

[0026] In step S103, during the operation of the liquid supply pump, the actual liquid supply flow rate of the drug solution is collected, the liquid supply deviation and the trend of the liquid supply deviation are determined based on the target liquid supply flow rate and the actual liquid supply flow rate, and when the liquid supply deviation and the trend of the liquid supply deviation meet the preset adjustment conditions, the duty cycle of the pulse width modulation signal used to drive the liquid supply pump is corrected so that the actual liquid supply flow rate is maintained within the preset flow allowable range determined based on the target liquid supply flow rate.

[0027] Liquid supply deviation and the trend of liquid supply deviation are used to characterize the difference between the current liquid supply state and the target liquid supply state, and the direction of change of this difference over time, respectively, and can be expressed as: ; ; In the formula, This represents the liquid supply deviation at the current sampling time. For the target liquid supply flow rate, This represents the actual liquid supply flow rate. The trend of liquid supply deviation. This represents the time interval between adjacent sampling moments. A positive supply deviation indicates that the actual supply flow rate is lower than the target supply flow rate. In this case, the duty cycle of the pulse width modulation signal can be increased, thereby increasing the average drive voltage or operating speed of the supply pump. A negative supply deviation allows for a reduction in the duty cycle. The trend of supply deviation changes is used to distinguish whether the deviation is widening or converging, avoiding frequent adjustments to the supply pump based solely on a single flow deviation.

[0028] In step S104, a suspension enhancing medium is provided, and the suspension enhancing medium is heated and vaporized to obtain a vaporized product. During the process of transporting the vaporized product to the mixing chamber, the vaporized product is cooled to form a mist aerosol with a temperature lower than the preset drug stability temperature upper limit.

[0029] The suspending synergist can be a medium capable of forming vaporization products upon heating and compatible with the drug liquid. This medium should not cause inactivation, decomposition, or adverse reactions of the active pharmaceutical ingredient upon contact with the drug aerosol. Heating and vaporization are performed separately from drug liquid atomization, allowing the suspending synergist to form vaporization products at a higher temperature while the drug liquid remains atomized at a lower temperature. The vaporization products are cooled by a cooling airflow or heat exchange path before entering the mixing chamber, preventing direct contact between the high-temperature vaporization products and the drug aerosol. The aerosol carrier is formed after the vaporization products have cooled and is used to assist in carrying the drug droplets; its temperature upon entering the mixing chamber is below the preset upper limit of the drug's stable temperature.

[0030] In step S105, the drug aerosol and the carrier aerosol are introduced into the mixing chamber respectively. The mixing air supply parameters are determined according to the actual liquid supply flow rate, the selected ultrasonic working level and the unit time vaporization rate of the suspension enhancement medium. Air is supplied to the mixing chamber according to the mixing air supply parameters so that the drug aerosol and the carrier aerosol mix in the mixing chamber to form a composite suspended mist, and the composite suspended mist is delivered to the animal breeding space.

[0031] Mixing air supply parameters can include air volume and air velocity. Their determination process considers the amount of drug aerosol generated corresponding to the actual liquid supply flow rate, the atomization state corresponding to the selected ultrasonic working level, and the vaporization rate of the suspended synergist medium per unit time. If the air volume is too low, the two aerosols are prone to stagnation or localized aggregation in the mixing chamber; if the air volume is too high, the two aerosols may be directly discharged before sufficient contact. Drug aerosols and carrier aerosols can enter the mixing chamber along intersecting directions and undergo physical contact and accompanying transport under the action of air supply. The mixing process does not require a chemical reaction. The carrier aerosol can reduce the probability of drug droplets agglomerating and forming larger droplets, resulting in a composite suspended mist with good spatial diffusion and suspension capabilities.

[0032] Example 2 This embodiment, based on Embodiment 1, further illustrates the determination of the target liquid supply flow rate, the collection of the actual liquid supply flow rate, and the liquid supply adjustment method.

[0033] The target liquid supply flow rate is determined by allocating the target application rate according to the atomization operation duration and the number of gas-liquid mixing ultrasonic atomizing nozzles. Before and during the atomization operation, the liquid level in the storage container, the liquid supply pressure in the supply pipeline, the temperature of the compressed carrier gas, and the temperature of the drug solution are collected. When the liquid level is lower than the preset lower limit, the liquid supply pressure exceeds the preset allowable pressure range, the temperature of the compressed carrier gas reaches the preset upper limit of the drug stability temperature, or the temperature of the drug solution reaches the preset upper limit of the drug stability temperature, the operation of the liquid supply pump and the gas-liquid mixing ultrasonic atomizing nozzles is stopped, and the supply of compressed carrier gas is cut off.

[0034] According to multiple continuously set sampling cycles, a flow detection device installed in the liquid supply pipeline between the liquid supply pump and the gas-liquid mixing ultrasonic atomizing nozzle collects pulse sequences corresponding to the liquid supply flow rate; the pulse frequency of the pulse sequence in each sampling cycle is statistically analyzed, and the pulse frequency is converted into the actual liquid supply flow rate according to the pre-calibrated flow rate conversion relationship; the liquid supply volume of each sampling cycle is determined based on the actual liquid supply flow rate and the corresponding sampling duration in each sampling cycle, and the liquid supply volume of each sampling cycle is accumulated to obtain the cumulative drug supply volume; the target liquid supply flow rate is adjusted according to the difference between the target application amount and the cumulative drug supply volume and the remaining atomization operation time.

[0035] The liquid supply deviation is the difference between the target liquid supply flow rate and the actual liquid supply flow rate. The trend of the liquid supply deviation is determined based on the liquid supply deviation obtained from two adjacent samplings. The preset adjustment conditions include a first adjustment condition and a second adjustment condition. The first adjustment condition is that the actual liquid supply flow rate exceeds the preset flow rate allowable range. The second adjustment condition is that the actual liquid supply flow rate is within the preset flow rate allowable range and the absolute value of the liquid supply deviation continuously increases. When either the first or second adjustment condition is met, the duty cycle is increased when the actual liquid supply flow rate is lower than the target liquid supply flow rate, and decreased when the actual liquid supply flow rate is higher than the target liquid supply flow rate. The correction range of the duty cycle is determined based on the absolute value of the liquid supply deviation and the trend of the liquid supply deviation. When the actual liquid supply flow rate is within the preset flow rate allowable range and the absolute value of the liquid supply deviation does not increase, the current duty cycle is maintained.

[0036] Specifically, the target liquid supply flow rate can be determined under the condition that all gas-liquid mixing ultrasonic atomizing nozzles operate synchronously and undertake the same liquid supply volume, and the calculation relationship is as follows: ; In the formula, This represents the target liquid supply flow rate for a single gas-liquid mixing ultrasonic atomizing nozzle. The target dosage is defined as N, the number of gas-liquid mixed ultrasonic atomizing nozzles, and T as the atomization operation time. The liquid level in the reservoir determines whether the drug solution in the reservoir can meet the continuous supply requirements. The supply pressure identifies blockages, leaks, or malfunctions in the supply pipeline or the supply pump. The compressed carrier gas temperature and drug solution temperature determine whether the atomization process is within the allowable range for drug stability. A shutdown protection mechanism is activated when any abnormal condition is triggered, preventing the supply pump from running dry, nozzles from vibrating without liquid, and abnormal temperatures from affecting the stability of the drug solution.

[0037] The flow detection element can be a Hall effect micro turbine flow meter. When the drug liquid flows through the flow detection element, it drives the internal impeller to rotate. The impeller speed changes with the flow velocity, and the Hall element converts the magnetic field changes generated by the impeller rotation into a pulse sequence. The actual liquid supply flow rate in each sampling period can be determined by the following formula: ; In the formula, The actual liquid supply flow rate during the i-th sampling period. Where is the corresponding pulse frequency, and K is the flow conversion coefficient obtained through the flow detection device calibration. The sampling period should not be too short to reduce the impact of impeller rotation fluctuations and pulse jitter on the flow results, nor should it be too long to avoid significant delays in liquid supply adjustment.

[0038] The cumulative supply of the drug solution can be determined by the following formula: ; In the formula, To complete the cumulative drug supply in the m-th sampling period, This represents the sampling duration for the i-th sampling period. When the actual liquid supply flow rate is expressed in liters per minute, the sampling duration should be expressed in minutes accordingly. During the atomization operation, the target liquid supply flow rate can be re-determined based on the remaining target application amount, and the calculation relationship is as follows: ; In the formula, The corrected target liquid supply flow rate, This represents the remaining atomization operation time. This compensates for insufficient liquid supply during startup, short-term flow fluctuations, or cumulative supply deviations caused by shutdown protection, ensuring that the cumulative supply at the end of the atomization operation is close to the target application rate.

[0039] The preset allowable flow rate range can be defined by the upper and lower limits corresponding to the target liquid supply flow rate. Correction is performed when the actual liquid supply flow rate crosses any boundary. If the actual liquid supply flow rate is still within the allowable range but the absolute value of the supply deviation continuously increases, advance adjustment is made to reduce the possibility of the actual liquid supply flow rate continuing to deviate and cross the boundary. The trend of the supply deviation can be determined by comparing the absolute value of the supply deviation at continuous sampling times. A continuous increase indicates that the supply state is tending towards divergence, while remaining unchanged or decreasing indicates that the supply state is tending towards stability or convergence.

[0040] The duty cycle of the pulse width modulation (PWM) signal is used to change the effective energization ratio of the pump within a single drive cycle. Increasing the duty cycle increases the average drive quantity of the pump, while decreasing the duty cycle decreases it. The duty cycle correction magnitude increases with the absolute value of the supply deviation, with a larger correction magnitude used when the supply deviation continues to widen and a smaller correction magnitude used when the supply deviation approaches the center of the allowable range and tends to decrease. Maintaining the current duty cycle means not making any new adjustments to the current drive state to avoid repeated fluctuations in the actual supply flow rate around the target supply flow rate.

[0041] Example 3 This embodiment, based on Embodiment 2, further defines the generation method of the pulse width modulation signal duty cycle. Specifically, in this embodiment, the liquid supply deviation and its changing trend are used as inputs for rule-based reasoning. Incremental correction amounts for the proportional, integral, and derivative adjustment parameters are determined according to preset adjustment rules. The proportional, integral, and derivative adjustment parameters are updated based on these incremental correction amounts. A liquid supply control quantity is generated based on the updated proportional, integral, and derivative adjustment parameters, and this quantity is converted into the duty cycle of the pulse width modulation signal. Before atomization, multiple candidate parameter groups are established, each consisting of a base value for the proportional, integral, and derivative adjustment parameters. Liquid supply adjustment is performed using each candidate parameter group. Based on the cumulative liquid supply deviation, flow overshoot amplitude, adjustment duration, and steady-state flow fluctuation, the candidate parameter groups are compared according to a preset evaluation priority order. The candidate parameter group with the highest comparison result is retained for the next round of parameter adjustment until a preset number of iterations is met. The final retained candidate parameter group is used as the base value for the proportional, integral, and derivative adjustment parameters.

[0042] The rule-based reasoning process normalizes the liquid supply deviation and its changing trend to a unified input domain, dividing it into seven state levels: negative large, negative medium, negative small, zero, positive small, positive medium, and positive large. Each state level can be represented by a triangular membership function, which determines the degree to which the current input belongs to different state levels. The controller queries preset adjustment rules based on the state combination of the two inputs to obtain the incremental correction amounts corresponding to the proportional, integral, and derivative adjustment parameters.

[0043] The proportional control parameter is used to adjust the supply control quantity according to the current supply deviation. The integral control parameter is used to compensate for the accumulated supply deviation during continuous sampling. The derivative control parameter is used to suppress flow overshoot and repeated fluctuations based on the trend of supply deviation changes. When the supply deviation is large, the proportional control effect can be improved; when the supply deviation persists, the integral control effect can be improved; when the supply deviation changes rapidly, the derivative control effect can be improved. The incremental correction is used to update the corresponding control parameter in each sampling period, enabling the supply control quantity to adjust according to changes in the supply status.

[0044] When converting the liquid supply control quantity into the duty cycle of a pulse width modulation signal, a proportional conversion can be performed based on the allowable drive range of the liquid supply pump, and the conversion result is limited to between a preset upper and lower duty cycle limit. When the liquid supply control quantity reaches the upper or lower limit, the corresponding boundary value is maintained to prevent the liquid supply pump from exceeding its rated operating range. A single adjustment limit can also be set for the duty cycle change to reduce the liquid supply pressure surge caused by sudden changes in the liquid supply pump speed.

[0045] Each candidate parameter set can be represented as: ; In the formula, For candidate parameter groups, This is the base value for the proportional adjustment parameter. This is the base value for the integral adjustment parameter. These are the baseline values ​​for the differential adjustment parameters. Each candidate parameter group undergoes liquid supply adjustment under the same target liquid supply flow rate and the same evaluation period to ensure comparability of control results across different candidate parameter groups.

[0046] The comprehensive evaluation value of the candidate parameter group can be expressed as: ; In the formula, For comprehensive evaluation, The deviation is the liquid supply, and T is the evaluation period. For the overshoot amplitude, To adjust the duration, to These are the weights for the corresponding evaluation items. The integral of the absolute value of the supply deviation is used to characterize the cumulative deviation within the evaluation period. The integral of the square of the supply deviation can improve the degree of influence of large deviations and steady-state fluctuations on the evaluation results. Each weight can be predetermined according to the requirements of application accuracy, flow stability, and response speed.

[0047] The fitness of the i-th candidate parameter group can be expressed as: ; In the formula, Let i be the fitness of the i-th candidate parameter group. This represents the corresponding comprehensive evaluation value. The smaller the comprehensive evaluation value, the higher the fitness, and the higher the ranking of the candidate parameter group. The retained candidate parameter groups can be reorganized and perturbed to form the next round of candidate parameter groups, and the evaluation process is repeated in the same way. After reaching the preset number of iterations, the final basic parameter combination can be expressed as: ; In the formula, , and These are the final determined base values ​​for the proportional control parameter, integral control parameter, and derivative control parameter. This combination of base parameters is used for parameter initialization at the start of atomization operations and is dynamically updated during atomization operations using incremental corrections obtained through rule-based reasoning.

[0048] Example 4 This embodiment, based on Embodiment 1, further defines the candidate ultrasonic operating level set, the determination of the selected ultrasonic operating level, and the temperature protection method of the gas-liquid mixing ultrasonic atomizing nozzle. Specifically, in this embodiment, the candidate ultrasonic operating level set is pre-stored in the controller, which includes multiple candidate ultrasonic operating levels, each corresponding to a preset driving frequency, preset input power, droplet size level, and atomization rate level per unit time.

[0049] The steps for selecting a specific ultrasonic working level include: screening the corresponding candidate ultrasonic working level from the candidate ultrasonic working level set according to the target droplet size level, and determining the selected ultrasonic working level from the screened candidate ultrasonic working level according to the target atomization rate per unit time; when there are multiple screened candidate ultrasonic working levels, the candidate ultrasonic working level whose corresponding atomization rate per unit time is closest to the target atomization rate per unit time is determined as the selected ultrasonic working level; when there is no candidate ultrasonic working level that simultaneously corresponds to the target droplet size level and the target atomization rate per unit time, the selected ultrasonic working level is determined from the candidate ultrasonic working level set according to the preset particle size priority condition or atomization rate priority condition.

[0050] The gas-liquid mixing ultrasonic atomizing nozzle is driven according to the preset drive frequency and preset input power corresponding to the selected ultrasonic working level, and the temperature of the drug liquid is collected during atomization. When the temperature of the drug liquid reaches the preset power reduction temperature threshold, the preset drive frequency is kept unchanged and the input power of the gas-liquid mixing ultrasonic atomizing nozzle is reduced. When the temperature of the drug liquid reaches the preset drug stable temperature upper limit, the operation of the gas-liquid mixing ultrasonic atomizing nozzle is stopped. When the temperature of the drug liquid drops to the preset recovery temperature threshold, the operation of the gas-liquid mixing ultrasonic atomizing nozzle is resumed according to the selected ultrasonic working level, and the preset recovery temperature threshold is lower than the preset power reduction temperature threshold.

[0051] The candidate ultrasonic operating levels are set during the equipment design and calibration phase and written into the controller before atomization begins. Each candidate ultrasonic operating level corresponds to a stable resonant state of the gas-liquid mixed ultrasonic atomizing nozzle. A preset drive frequency is used to excite the corresponding resonant operating point, and a preset input power is used to determine the ultrasonic vibration intensity. The droplet size class and atomization rate per unit time class are preset classification information associated with that level and are not obtained through real-time measurement at the animal breeding site. During actual operation, the controller only calls and compares the stored level information; the user does not need to detect the droplet size or atomization rate. Using different resonant operating points of the same ultrasonic vibration component, the atomization state can be changed by switching the drive frequency, while changes in input power mainly affect the atomization intensity and atomization rate per unit time.

[0052] The droplet size rating can be set according to a pre-defined range, and the atomization rate per unit time can be set according to the range of drug liquid atomization volume per unit time. During the screening process, the applicable settings are first defined using the target droplet size rating, and then the atomization rate per unit time of each applicable setting is compared. This ensures that the selected ultrasonic setting simultaneously considers spatial suspension requirements and drug delivery progress. When multiple candidate ultrasonic settings can meet the target droplet size rating, the setting whose atomization rate per unit time is closest to the target atomization rate per unit time is selected, which can reduce the deviation between the actual atomization output and the application requirements.

[0053] The particle size priority condition is suitable for nebulization operations that require improved drug aerosol suspension, diffusion uniformity, or the ability to penetrate local spaces. The controller prioritizes candidate ultrasonic operating levels that meet the droplet size requirements. The atomization volume priority condition is suitable for nebulization operations that require completing the target dosage within a limited operation time. The controller prioritizes candidate ultrasonic operating levels that meet the atomization volume per unit time requirements. Both particle size and atomization volume priority conditions can be pre-configured based on the volume of the animal husbandry space, ventilation conditions, application time, and drug type to avoid interrupting nebulization operations when a perfectly matching setting is not available.

[0054] The temperature of the drug solution can be collected by a temperature sensor positioned near the gas-liquid mixing ultrasonic atomizing nozzle along the supply path, allowing the detection results to reflect the temperature change of the drug solution before entering the atomization zone. The preset power reduction temperature threshold is lower than the preset drug stability temperature upper limit, creating a temperature protection margin between the two. When the drug solution temperature reaches the preset power reduction temperature threshold, the preset driving frequency remains unchanged, maintaining the current resonant operating point. Reducing the input power reduces the liquid temperature rise caused by continuous ultrasonic energy input. After reducing the input power, the atomization volume per unit time can decrease accordingly, but the selected ultrasonic operating level is not immediately changed to reduce atomization fluctuations caused by frequent level changes. Increasing the input power usually increases the sound pressure and capillary wave amplitude in the liquid, enhancing the atomization effect; therefore, reducing the input power can suppress further temperature rise to some extent.

[0055] The gas-liquid mixing ultrasonic atomizing nozzle stops operating when the drug solution temperature reaches the preset upper limit of the drug stability temperature to prevent the drug solution from being further subjected to ultrasonic energy. The preset recovery temperature threshold is lower than the preset power reduction temperature threshold, creating a hysteresis range between the stop temperature and the recovery temperature. This prevents the gas-liquid mixing ultrasonic atomizing nozzle from frequently starting and stopping when the drug solution temperature fluctuates near the critical value. After the drug solution temperature drops to the preset recovery temperature threshold, the controller re-activates the preset drive frequency and preset input power corresponding to the selected ultrasonic operating mode, restoring the original atomization state.

[0056] Example 5 This embodiment, based on Embodiment 1, further defines the formation of the mist-carrying aerosol and the mixing process of the composite suspended mist. The suspending synergistic medium is a medium compatible with the drug solution and does not affect the stability of the drug solution. Specifically, this embodiment includes: Select the vaporization setting based on the required vaporization rate per unit time, and deliver the suspended synergistic medium to the heated vaporization chamber. Heat and vaporize the medium according to the supply rate and heating power corresponding to the vaporization setting to form vaporization products. Transport the vaporization products to the mixing chamber via a conveying channel. Introduce cooling airflow into the conveying channel and adjust the flow rate of the cooling airflow according to the temperature of the vaporization products, ensuring that the vaporization products form a mist-carrying aerosol with a temperature lower than the preset upper limit of the drug's stable temperature before entering the mixing chamber. Introduce the drug aerosol and the mist-carrying aerosol into the mixing chamber through intersecting mist inlet channels. Select the mixing air supply parameters based on the actual liquid supply flow rate, the selected ultrasonic setting, and the vaporization setting, and supply air to the mixing chamber according to the mixing air supply setting, ensuring that the drug aerosol and the mist-carrying aerosol are in full contact within the mixing chamber to form a composite suspended mist.

[0057] The suspending synergist medium can be selected from those capable of stable vaporization under predetermined heating conditions, forming fine aerosol particles upon cooling, and without precipitation, stratification, inactivation, or adverse chemical reactions with the drug solution. Compatibility can be determined by considering the acidity / alkalinity of the drug solution, the solvent system, and the stability range of the active ingredient. For drug solutions containing active microorganisms or other heat-sensitive components, the suspending synergist medium should also meet the safety requirements for use in animal husbandry spaces, avoiding the introduction of components that may adversely affect animals, equipment, or the environment.

[0058] The gasification operating settings can be pre-configured as corresponding combinations of supply rate and heating power, and stored in the controller. When the demand for gasification per unit time increases, a gasification operating setting with a higher supply rate and matching heating power is selected to avoid mismatch between supply rate and heating capacity, which could lead to residual suspended synergistic media, localized overheating, or discontinuous gasification. In actual operation, the controller drives the media supply component and heating component according to the selected gasification operating setting, eliminating the need for the user to measure the amount of gasification products generated on-site.

[0059] After leaving the heated vaporization chamber, the vaporized products are at a high temperature. The conveying channel provides a cooling distance and contact space for the cooling airflow. Temperature sensors can be positioned near the mixing chamber inlet in the conveying channel, using the temperature of the vaporized products before entering the mixing chamber as the basis for adjustment. When the vaporized product temperature increases, the cooling airflow rate is increased; when the vaporized product temperature decreases, the cooling airflow rate is decreased. This ensures continuous output of the aerosol-carrying mist while preventing over-cooling that could lead to condensation and accumulation of the suspended synergistic medium within the conveying channel.

[0060] Intersecting mist inlet channels allow drug aerosols and carrier aerosols to form cross-flow zones after entering the mixing chamber. The actual liquid supply flow rate characterizes the current amount of drug aerosol generated; the selected ultrasonic operating level characterizes the droplet size and atomization rate per unit time of the drug aerosol; and the vaporization operating level characterizes the generation state of the carrier aerosol. The controller can call pre-configured mixing air supply parameters based on the combination of these three parameters. These parameters may include air volume and air velocity.

[0061] The air volume and velocity should ensure sufficient contact time between the two aerosols within the mixing chamber and allow for continuous discharge into the animal husbandry space. Sufficient contact means that the aerosol particles carrying the mist and the drug aerosol droplets come into contact, adhere, or move together under airflow disturbance; a chemical reaction or complete fusion is not required. This maintains the stability of the drug solution while reducing the likelihood of drug droplet aggregation and rapid sedimentation, allowing the composite suspension to continuously diffuse within the animal husbandry space.

[0062] This invention combines dynamic adjustment of liquid supply flow rate, temperature control to protect drug activity, composite suspension enhancing medium, and mixed air supply control to enable the drug solution to form a stable atomized state under suitable operating conditions. This effectively reduces the impact of liquid supply fluctuations on droplet size and atomization volume, and improves the consistency of atomization output under different operating conditions. At the same time, by colliding and combining drug aerosols with carrier aerosols to form composite suspended mist, the suspension and diffusion capabilities of droplets in the breeding space are enhanced while maintaining drug activity. This improves the uniformity of spatial coverage and the duration of action, reduces drug waste, and reduces humidity fluctuations in the breeding environment, which is beneficial for improving the air environment of animal breeding spaces and enhancing drug application efficacy.

[0063] Based on the same line of thought, such as Figure 2 The diagram shown is a structural block diagram of an atomizer provided in an embodiment of the present invention. An atomizer includes a drug liquid tank 1, a liquid pump 2, an air compressor 3, a two-fluid ultrasonic nozzle 4, a synergist vaporization device 5, a mixing chamber 6, a fan 7, and a controller 8. The drug liquid tank 1 is connected to the two-fluid ultrasonic nozzle 4 via the liquid pump 2. The air compressor 3 is connected to the two-fluid ultrasonic nozzle 4. The two-fluid ultrasonic nozzle 4 and the synergist vaporization device 5 are respectively connected to the mixing chamber 6. The fan 7 is used to discharge the mixed mist formed in the mixing chamber 6. The controller 8 is connected to the liquid pump 2, the air compressor 3, the two-fluid ultrasonic nozzle 4, the synergist vaporization device 5, and the fan 7. The atomizer is used to perform the above-described drug atomization method in animal husbandry.

[0064] The specific details of the atomizer described above have been explained in detail in the method section of the implementation plan. Any undisclosed details can be found in the implementation plan of the method section, and therefore will not be repeated here.

[0065] The above figures are merely illustrative of the processes included in the method according to exemplary embodiments of the present invention and are not intended to be limiting. It is readily understood that the processes shown in the above figures do not indicate or limit the temporal order of these processes. Furthermore, it is also readily understood that these processes may be executed synchronously or asynchronously, for example, in multiple modules.

[0066] It should be noted that although several modules or units of the system have been mentioned in the detailed description above, this division is not mandatory. In fact, according to exemplary embodiments of the present invention, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided and embodied by multiple modules or units.

[0067] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the claims.

[0068] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A method for atomizing drugs in animal husbandry, characterized in that, Includes the following steps: Based on the application requirements of the animal breeding space, the target application amount, target atomization state, and target liquid supply flow rate of the drug solution are determined. The target atomization state includes the target droplet size and the target atomization amount per unit time. A set of candidate ultrasonic working positions for the gas-liquid mixing ultrasonic atomizing nozzle is established. The candidate ultrasonic working positions correspond to different resonant working points. The drug solution is delivered from the storage container to the gas-liquid mixing ultrasonic atomizing nozzle via a liquid supply pump. Cooled compressed carrier gas is introduced into the gas-liquid mixing ultrasonic atomizing nozzle. A candidate ultrasonic working position is selected from the candidate ultrasonic working position set according to the target atomization state. The gas-liquid mixing ultrasonic atomizing nozzle is controlled according to the selected ultrasonic working position to atomize the drug solution into a drug aerosol under the condition that the drug temperature does not exceed the preset drug stability temperature upper limit. During the operation of the liquid supply pump, the actual liquid supply flow rate of the drug solution is collected. The liquid supply deviation and the trend of the liquid supply deviation are determined based on the target liquid supply flow rate and the actual liquid supply flow rate. When the liquid supply deviation and the trend of the liquid supply deviation meet the preset adjustment conditions, the duty cycle of the pulse width modulation signal used to drive the liquid supply pump is corrected so that the actual liquid supply flow rate is maintained within the preset flow rate allowable range determined based on the target liquid supply flow rate. A suspension synergistic medium is provided, which is then heated and vaporized to obtain a vaporization product. During the process of transporting the vaporization product to the mixing chamber, the vaporization product is cooled to form a mist aerosol with a temperature lower than the preset drug stability temperature upper limit. The drug aerosol and the mist-carrying aerosol are respectively introduced into the mixing chamber. The mixing air supply parameters are determined according to the actual liquid supply flow rate, the selected ultrasonic working level, and the unit time vaporization rate of the suspension synergist. Air is supplied to the mixing chamber according to the mixing air supply parameters, so that the drug aerosol and the mist-carrying aerosol are mixed in the mixing chamber to form a composite suspended mist, and the composite suspended mist is delivered to the animal breeding space.

2. The method for atomizing drugs in animal husbandry according to claim 1, characterized in that, The target liquid supply flow rate is determined by allocating the target application amount according to the atomization operation duration and the number of gas-liquid mixing ultrasonic atomizing nozzles. Before and during the atomization operation, the liquid level in the storage container, the liquid supply pressure in the supply pipeline, the temperature of the compressed carrier gas, and the temperature of the drug solution are collected. When the liquid level in the reservoir is lower than the preset lower limit, the liquid supply pressure exceeds the preset allowable pressure range, the temperature of the compressed carrier gas reaches the preset upper limit of the drug stability temperature, or the temperature of the drug liquid reaches the preset upper limit of the drug stability temperature, the operation of the liquid supply pump and the gas-liquid mixing ultrasonic atomizing nozzle is stopped, and the supply of compressed carrier gas is cut off.

3. The method for atomizing drugs in animal husbandry according to claim 2, characterized in that, According to multiple continuously set sampling cycles, a pulse sequence corresponding to the liquid supply flow rate is collected by a flow detection device in the liquid supply pipeline between the liquid supply pump and the gas-liquid mixing ultrasonic atomizing nozzle. The pulse frequency of the pulse sequence within each sampling period is statistically analyzed, and the pulse frequency is converted into the actual liquid supply flow rate according to a pre-calibrated flow rate conversion relationship; The liquid supply volume for each sampling period is determined based on the actual liquid supply flow rate and the corresponding sampling duration within each sampling period. The liquid supply volumes for each sampling period are then summed to obtain the cumulative supply volume of the drug solution. The target liquid supply flow rate is adjusted based on the difference between the target application rate and the cumulative supply of the drug solution, as well as the remaining atomization operation time.

4. The method for atomizing drugs in animal husbandry according to claim 3, characterized in that, The liquid supply deviation is the difference between the target liquid supply flow rate and the actual liquid supply flow rate, and the trend of the liquid supply deviation is determined based on the liquid supply deviation obtained from two adjacent samplings. The preset adjustment conditions include a first adjustment condition and a second adjustment condition. The first adjustment condition is that the actual liquid supply flow rate exceeds the preset flow rate allowable range. The second adjustment condition is that the actual liquid supply flow rate is within the preset flow rate allowable range and the absolute value of the liquid supply deviation continuously increases. When the first adjustment condition or the second adjustment condition is met, the duty cycle is increased when the actual liquid supply flow rate is lower than the target liquid supply flow rate, and the duty cycle is decreased when the actual liquid supply flow rate is higher than the target liquid supply flow rate. The correction range of the duty cycle is determined according to the absolute value of the liquid supply deviation and the trend of the liquid supply deviation. When the actual liquid supply flow rate is within the preset flow rate allowable range and the absolute value of the liquid supply deviation does not increase, the current duty cycle is maintained.

5. The method for atomizing drugs in animal husbandry according to claim 3, characterized in that, The liquid supply deviation and the trend of liquid supply deviation are used as input for rule reasoning, and the incremental correction amounts of the proportional adjustment parameter, integral adjustment parameter and derivative adjustment parameter are determined according to the preset adjustment rules. The proportional control parameter, integral control parameter, and derivative control parameter are updated according to the incremental correction amount. The liquid supply control quantity is generated according to the updated proportional control parameter, integral control parameter, and derivative control parameter, and the liquid supply control quantity is converted into the duty cycle of the pulse width modulation signal. Before atomization, multiple candidate parameter groups are established, consisting of basic values ​​for proportional, integral, and derivative adjustment parameters. Liquid supply is adjusted using each candidate parameter group. Based on the cumulative liquid supply deviation, flow overshoot, adjustment duration, and steady-state flow fluctuation, the candidate parameter groups are compared according to a preset evaluation priority order. The candidate parameter group with the higher comparison result is retained for the next round of parameter adjustment until the preset number of iterations is met. The finally retained candidate parameter group is used as the basic value for the proportional, integral, and derivative adjustment parameters.

6. The method for atomizing drugs in animal husbandry according to claim 1, characterized in that, The set of candidate ultrasonic working modes is pre-stored in the controller, which includes multiple candidate ultrasonic working modes, each of which corresponds to a preset driving frequency, preset input power, droplet size level, and atomization amount level per unit time.

7. The method for atomizing drugs in animal husbandry according to claim 6, characterized in that, The steps for selecting the selected ultrasound working level include: Based on the target droplet size level, the corresponding candidate ultrasonic working level is selected from the candidate ultrasonic working level set, and based on the target atomization amount per unit time, the selected ultrasonic working level is determined from the selected candidate ultrasonic working level. When there are multiple candidate ultrasonic working levels selected, the candidate ultrasonic working level whose corresponding atomization rate per unit time is closest to the target atomization rate per unit time is determined as the selected ultrasonic working level. When there are no candidate ultrasonic working levels that simultaneously correspond to the target droplet size level and the target atomization amount per unit time, the selected ultrasonic working level is determined from the set of candidate ultrasonic working levels according to preset droplet size priority conditions or atomization amount priority conditions.

8. The method for atomizing drugs in animal husbandry according to claim 7, characterized in that, The gas-liquid mixing ultrasonic atomizing nozzle is driven according to the preset driving frequency and preset input power corresponding to the selected ultrasonic working level, and the temperature of the drug liquid is collected during atomization. When the temperature of the drug solution reaches the preset power reduction temperature threshold, the preset driving frequency remains unchanged and the input power of the gas-liquid mixing ultrasonic atomizing nozzle is reduced. When the temperature of the drug solution reaches the preset upper limit of the stable drug temperature, the operation of the gas-liquid mixing ultrasonic atomizing nozzle is stopped. When the temperature of the drug solution drops to a preset recovery temperature threshold, the operation of the gas-liquid mixed ultrasonic atomizing nozzle is restored according to the selected ultrasonic working level. The preset recovery temperature threshold is lower than the preset power reduction temperature threshold.

9. The method for atomizing drugs in animal husbandry according to claim 1, characterized in that, The suspending synergistic medium is a medium compatible with the drug solution and does not affect the stability of the drug solution; the method further includes: Select the gasification working level according to the required gasification volume per unit time, deliver the suspended enhancement medium to the heating gasification chamber, and heat and gasify the suspended enhancement medium according to the supply rate and heating power corresponding to the gasification working level to form gasification products. The vaporized product is conveyed to the mixing chamber via a conveying channel. A cooling airflow is introduced into the conveying channel, and the flow rate of the cooling airflow is adjusted according to the temperature of the vaporized product, so that the vaporized product forms a mist aerosol with a temperature lower than the preset drug stability temperature upper limit before entering the mixing chamber. The drug aerosol and the carrier aerosol are introduced into the mixing chamber through intersecting mist inlet channels. The mixing air supply parameters are selected according to the actual liquid supply flow rate, the selected ultrasonic working level, and the vaporization working level. Air is supplied to the mixing chamber according to the mixing air supply parameters so that the drug aerosol and the carrier aerosol can fully contact each other in the mixing chamber to form the composite suspended mist.

10. An atomizer, characterized in that, The atomizer includes a drug tank, a liquid pump, an air compressor, a two-fluid ultrasonic nozzle, a synergist vaporization device, a mixing chamber, a fan, and a controller. The drug tank is connected to the two-fluid ultrasonic nozzle via the liquid pump. The air compressor is connected to the two-fluid ultrasonic nozzle. The two-fluid ultrasonic nozzle and the synergist vaporization device are respectively connected to the mixing chamber. The fan is used to discharge the mixed mist formed in the mixing chamber. The controller is connected to the liquid pump, the air compressor, the two-fluid ultrasonic nozzle, the synergist vaporization device, and the fan. The atomizer is used to implement the atomization method for drugs in animal husbandry as described in any one of claims 1-9.

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