Method for adjusting suction force of a nasal aspirator and nasal aspirator

Abstract

The application provides a method for adjusting suction force of a nose suction device and the nose suction device. The method comprises the following steps: determining a suction force control parameter in response to a starting instruction; establishing a mapping relationship between a negative pressure range and a driving duty cycle of a motor according to the suction force control parameter, and providing a driving duty cycle adjustment reference basis corresponding to different negative pressures; acquiring a nasal cavity negative pressure value in real time during a nose suction process to determine a nasal cavity state and a target negative pressure range; if the nasal cavity state is a blockage state, adjusting the driving duty cycle according to the target negative pressure range and the mapping relationship to adjust the suction force; if the nasal cavity state is a blockage removal state, triggering a removal adjustment process to adjust the driving duty cycle to adjust the suction force. The method can perceive different nasal cavity states represented by whether the secretion in the nasal cavity is sucked out based on the nasal cavity negative pressure value, automatically adjusts the suction force, and is beneficial to matching the suction force under different nasal cavity states, comfort and safety, and ensures the nose suction effect.

Description

Technical Field

[0001] This application relates to the field of nasal aspirators, and more particularly to a method for adjusting the suction of a nasal aspirator and a nasal aspirator itself. Background Technology

[0002] Currently, infants and young children have narrow nasal cavities and delicate mucous membranes, making it difficult to clear secretions. Existing electric nasal aspirators mainly use manual multi-level adjustment or constant suction output. However, the viscosity of secretions changes dynamically with health conditions and the nasal aspiration process. Constant suction output cannot adapt to these changes, and manual adjustment cannot be timely and accurate. Therefore, the suction power is mismatched, resulting in insufficient or excessive suction, which affects the nasal aspiration effect. At the same time, if the suction power is maintained at the level that has not been removed when the viscous secretions are suctioned away and the nasal cavity is cleared, it can easily damage the nasal cavity, trigger the startle reflex in infants, and is not conducive to the continued removal of residual material (such as a large clump left after suctioning), which also affects the nasal aspiration effect. Summary of the Invention

[0003] This application provides a method for adjusting the suction of a nasal aspirator and a nasal aspirator itself, to solve at least one problem existing in the related art. The technical solution is as follows: In a first aspect, embodiments of this application provide a method for adjusting the suction of a nasal aspirator, including: In response to the start command, determine the suction control parameters; Based on the suction control parameters, a mapping relationship is established between the negative pressure range and the motor's drive duty cycle; The nasal cavity negative pressure value is acquired in real time during nasal inhalation, and the nasal cavity status and target negative pressure range are determined based on the nasal cavity negative pressure value. If the nasal cavity is blocked, the drive duty cycle is adjusted to adjust the suction power according to the target negative pressure range and mapping relationship. If the nasal cavity is unblocked, the unblocking adjustment process is triggered, and the drive duty cycle is adjusted to adjust the suction power.

[0004] In one implementation, determining the suction control parameters in response to the activation command includes: In response to the boot command, the contents of the memory are detected; If the stored content contains suction control parameters, read the memory to determine the suction control parameters; If the stored content does not have suction control parameters, execute the calibration process to determine the suction control parameters; The suction control parameters include the basic drive duty cycle, the basic boost slope, and the safety negative pressure threshold.

[0005] In one implementation, the step of performing a calibration process to determine the suction control parameters when the stored content does not have suction control parameters includes: When the stored content does not have suction control parameters, a calibration process is executed to safely drive the duty cycle control motor to start. Based on the safe drive duty cycle, the drive duty cycle is gradually increased in preset steps. At each increase in the drive duty cycle, the nasal cavity negative pressure value is measured and compared with the calibrated negative pressure range. When the measured nasal cavity negative pressure value exceeds the calibrated negative pressure range for the first time, the preset steps are reversed and the current drive duty cycle is determined as the base drive duty cycle. Using the basic drive duty cycle as a reference, the basic drive duty cycle is adjusted and the nasal cavity negative pressure value is measured. The adjusted basic drive duty cycle and the duty cycle change of the basic drive duty cycle are calculated, as well as the negative pressure difference between the adjusted measured nasal cavity negative pressure value and the measured nasal cavity negative pressure value corresponding to the basic drive duty cycle. The basic pressure ramp slope is determined based on the ratio of the duty cycle change to the negative pressure difference. The safe negative pressure threshold is determined based on the maximum value of the calibration negative pressure range and the maximum measured nasal negative pressure value in the calibration process, or the preset safe negative pressure is used as the safe negative pressure threshold.

[0006] In one embodiment, establishing the mapping relationship between the negative pressure range and the motor's drive duty cycle based on the suction control parameters includes: Determine the measured nasal negative pressure value corresponding to the basic drive duty cycle, and determine the suction adjustment line based on the basic drive duty cycle, the measured nasal negative pressure value corresponding to the basic drive duty cycle, and the basic pressure ramp. Based on the low negative pressure threshold and the safe negative pressure threshold, the suction adjustment line is divided into ranges to obtain the low negative pressure range below the low negative pressure threshold, the normal negative pressure range between the low negative pressure threshold and the safe negative pressure threshold, and the ultra-high negative pressure range above the safe negative pressure threshold. The drive duty cycle of the motor is configured for the low negative pressure range, normal negative pressure range, and ultra-high negative pressure range respectively, so as to obtain the mapping relationship between the negative pressure range and the drive duty cycle of the motor.

[0007] In one implementation, adjusting the drive duty cycle to adjust the suction power based on the target negative pressure range and the mapping relationship includes: When the target negative pressure range is the low negative pressure range, the basic drive duty cycle is maintained according to the mapping relationship to adjust the suction power; When the target negative pressure range is the normal negative pressure range, according to the mapping relationship, adjust the drive duty cycle to adjust the suction by adjusting the part of the suction adjustment line corresponding to the normal negative pressure range; When the target negative pressure range is the ultra-high negative pressure range, the driving duty cycle is adjusted according to the mapping relationship and the preset ratio of the theoretical maximum driving duty cycle to adjust the suction.

[0008] In one embodiment, the method further includes: When the target negative pressure range is an ultra-high negative pressure range and the duration is greater than the continuous threshold, the drive duty cycle is forcibly reduced to the protection drive duty cycle; After a preset time, the drive duty cycle will be restored to the basic drive duty cycle.

[0009] In one implementation, determining the nasal cavity status based on the nasal cavity negative pressure value includes: If the nasal cavity negative pressure value is greater than or equal to the high negative pressure threshold, the degree of change of nasal cavity negative pressure is calculated based on the nasal cavity negative pressure value obtained in real time at adjacent sampling times. When the degree of change in nasal negative pressure is greater than or equal to the degree threshold, the nasal state is determined to be a state of unblocked nasal cavity. If the nasal cavity negative pressure value is less than the high negative pressure threshold or the nasal cavity negative pressure change value is less than the degree threshold, the nasal cavity is determined to be in a blocked state.

[0010] In one implementation, if the nasal cavity is in a cleared state, triggering the adjustment process and adjusting the drive duty cycle to adjust the suction power includes: If the nasal cavity is in a cleared state, reduce the drive duty cycle to the residual drive duty cycle; the residual drive duty cycle is greater than the base drive duty cycle. Maintain a preset time length and determine the change state of nasal negative pressure value based on the nasal negative pressure value obtained in real time at several sampling times; When the change state is to remain or decrease, the drive duty cycle is gradually reduced to the base drive duty cycle. When the change state is to increase, the adjustment process ends, and the nasal cavity state is determined to be blocked.

[0011] In one embodiment, the method further includes: In response to a shutdown or update command, a self-learning process is triggered to collect feature data during the nasal suction process; Based on the characteristic data, determine the evaluation results of the nasal suction process; Based on the evaluation results, update the current suction control parameters and store the updated suction control parameters in memory; or, When the stored content does not have suction control parameters, the fixed suction process is executed instead of the calibration process. The nasal negative pressure value is matched with the corresponding preset level. According to the adjustment rules corresponding to the matched preset level, the drive duty cycle is adjusted to adjust the suction.

[0012] Secondly, embodiments of this application provide a nasal aspirator, comprising: The response module is used to determine the suction control parameters in response to the start command; A module is established to create a mapping relationship between the negative pressure range and the motor's drive duty cycle based on the suction control parameters. The determination module is used to acquire the nasal cavity negative pressure value in real time during nasal suction, and determine the nasal cavity status and target negative pressure range based on the nasal cavity negative pressure value; The adjustment module is used to adjust the drive duty cycle to adjust the suction power if the nasal cavity is blocked, based on the target negative pressure range and mapping relationship. If the nasal cavity is unblocked, it triggers the release adjustment process and adjusts the drive duty cycle to adjust the suction power.

[0013] In one implementation, the adjustment module is further configured to: When the target negative pressure range is an ultra-high negative pressure range and the duration is greater than the continuous threshold, the drive duty cycle is forcibly reduced to the protection drive duty cycle; After a preset time, the drive duty cycle will be restored to the basic drive duty cycle.

[0014] In one implementation, the adjustment module is further configured to: In response to a shutdown or update command, a self-learning process is triggered to collect feature data during the nasal suction process; Based on the characteristic data, determine the evaluation results of the nasal suction process; Based on the evaluation results, update the current suction control parameters and store the updated suction control parameters in memory; or, When the stored content does not have suction control parameters, the fixed suction process is executed instead of the calibration process. The nasal negative pressure value is matched with the corresponding preset level. According to the adjustment rules corresponding to the matched preset level, the drive duty cycle is adjusted to adjust the suction.

[0015] Thirdly, embodiments of this application provide an electronic device, including: a processor and a memory, wherein the memory stores instructions that are loaded and executed by the processor to implement the methods in any of the above-described embodiments.

[0016] Fourthly, embodiments of this application provide a computer-readable storage medium storing a computer program that, when executed, implements the methods in any of the above-described embodiments.

[0017] The beneficial effects of the above technical solution include at least the following: By responding to the start command, the suction control parameters are determined. Based on these parameters, a mapping relationship between the negative pressure range and the motor's drive duty cycle is established, providing a reference for adjusting the drive duty cycle for different negative pressures. During nasal suction, the nasal cavity negative pressure value is acquired in real time to determine the nasal cavity status and target negative pressure range. If the nasal cavity is blocked, the drive duty cycle is adjusted to adjust the suction based on the target negative pressure range and the mapping relationship. If the nasal cavity is unblocked, the unblocking adjustment process is triggered to adjust the drive duty cycle to adjust the suction. This system can sense whether nasal secretions have been suctioned out based on the nasal cavity negative pressure value, representing different nasal cavity states, and automatically make targeted suction adjustments. This helps to ensure suction matching, comfort, and safety under different nasal cavity states, ensuring the effectiveness of nasal suction.

[0018] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, these aspects, embodiments, and features will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0019] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0020] Figure 1 This is a flowchart illustrating the steps of a method for adjusting the suction of a nasal aspirator according to an embodiment of this application; Figure 2 This is a structural block diagram of a nasal aspirator according to an embodiment of this application; Figure 3 This is a structural block diagram of an electronic device according to an embodiment of this application. Detailed Implementation

[0021] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this application. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0022] Reference Figure 1 The flowchart illustrates a method for adjusting the suction power of a nasal aspirator according to an embodiment of this application. This method is executed by a processor (such as an MCU) in the nasal aspirator and may include at least steps S100-S400: S100: In response to the start command, determine the suction control parameters.

[0023] S200: Based on the suction control parameters, establish a mapping relationship between the negative pressure range and the motor's drive duty cycle.

[0024] S300: During nasal inhalation, the negative pressure value of the nasal cavity is acquired in real time, and the nasal cavity status and target negative pressure range are determined based on the negative pressure value.

[0025] S400: If the nasal cavity is blocked, adjust the drive duty cycle to adjust the suction power according to the target negative pressure range and mapping relationship. If the nasal cavity is unblocked, trigger the unblocking adjustment process and adjust the drive duty cycle to adjust the suction power.

[0026] The technical solution of this application determines the suction control parameters by responding to the start command. Based on the suction control parameters, a mapping relationship between the negative pressure range and the driving duty cycle of the motor is established, providing a reference for adjusting the driving duty cycle corresponding to different negative pressures. During nasal suction, the nasal cavity negative pressure value is acquired in real time to determine the nasal cavity state and the target negative pressure range. If the nasal cavity state is blocked, the driving duty cycle is adjusted according to the target negative pressure range and the mapping relationship to adjust the suction. If the nasal cavity state is unblocked, the unblocking adjustment process is triggered to adjust the driving duty cycle to adjust the suction. It can sense whether the nasal secretions are suctioned out based on the nasal cavity negative pressure value, representing different nasal cavity states, and automatically perform targeted suction adjustments, which helps to ensure suction matching, comfort, and safety under different nasal cavity states.

[0027] In one implementation, the suction control parameters include, but are not limited to, the base drive duty cycle, the base boost slope, and the safe negative pressure threshold. In this embodiment, the processor (such as an MCU) controls the speed of the motor (air pump motor) through a high-frequency PWM signal, thereby adjusting the suction. The drive duty cycle of the high-frequency PWM signal characterizes the suction strength; the larger the drive duty cycle, the greater the suction strength.

[0028] Optionally, step S100 includes steps S110-S130: S110. In response to the start command, detect the stored contents of the memory.

[0029] Optionally, the activation command includes, but is not limited to, commands generated by voice or manual operation. For example, the nasal aspirator can be equipped with a touchscreen to generate the activation command, or it can be equipped with a button to trigger the activation command. It should be noted that, for example, if some nasal aspirators have a manual mode and an intelligent mode (AI mode), then the specific activation command refers to the activation command for the intelligent mode (AI mode). If some nasal aspirators only have an intelligent mode, then the activation command can be a power-on / motor-start command. In this embodiment, the processor (such as an MCU) responds to the activation command by detecting the contents stored in the non-volatile memory to see if the storage content contains suction control parameters.

[0030] S120. When the stored content contains suction control parameters, read the memory to determine the suction control parameters.

[0031] Optionally, if the stored content contains suction control parameters, it indicates that the nasal aspirator is not being used for the first time and has already stored suction control parameters based on previous usage. In this case, reading the non-volatile memory can directly determine the suction control parameters.

[0032] S130. When the stored content does not have suction control parameters, execute the calibration process to determine the suction control parameters.

[0033] Optionally, if the stored content does not contain suction control parameters, it indicates that this is the first time the nasal aspirator's smart mode has been used. In this case, the processor automatically executes a calibration process to determine the suction control parameters, quickly establishing them and eliminating the risk of manual trial and error. The determined suction control parameters are then stored in the aforementioned non-volatile memory, which can be directly read the suction control parameters when the nasal aspirator's smart mode is used a second time.

[0034] In this embodiment of the application, S130 includes steps S1301-S1304: S1302. When the stored content does not have suction control parameters, execute the calibration process to safely drive the duty cycle control motor to start.

[0035] Optionally, when the stored content does not have suction control parameters, the processor executes a calibration process to control the motor to start with a safe drive duty cycle. For example, the safe drive duty cycle can be 10%, corresponding to approximately 10 kPa of nasal negative pressure to ensure safety. It should be noted that, in this embodiment, for ease of understanding, various duty cycles and thresholds are listed as exemplary values ​​and do not constitute specific limitations; in actual applications, they can be adjusted based on actual needs.

[0036] S1302. Based on the safe drive duty cycle, the drive duty cycle is gradually increased by a preset step, and the nasal cavity negative pressure value is measured and compared with the calibrated negative pressure range each time the drive duty cycle is increased. When the measured nasal cavity negative pressure value exceeds the calibrated negative pressure range for the first time, the preset step is reversed and the current drive duty cycle is determined as the base drive duty cycle.

[0037] Optionally, the nasal aspirator is equipped with a pressure sensor to measure the pressure value, i.e., the nasal cavity negative pressure value. Furthermore, by observing the signal fluctuation characteristics of the nasal cavity negative pressure value (e.g., changes), it can be confirmed that the aspirator tip has been inserted into the nasal cavity and formed effective contact. In this embodiment, based on a safe driving duty cycle, the driving duty cycle is gradually increased in preset steps. For example, the preset step is 5%, meaning the driving duty cycle increases by 5% increments. Each time the driving duty cycle increases by 5%, the corresponding nasal cavity negative pressure value is measured and compared with the calibrated negative pressure range. For example, the calibrated negative pressure range can be (20kPa, 35kPa), (30kPa, 65kPa), (20kPa, 65kPa), etc. We will use (20kPa, 35kPa) as an example for illustration. Since the measured nasal negative pressure value is compared with the calibrated negative pressure range with each increase in the drive duty cycle, the processor can know that the statistically measured nasal negative pressure value exceeds the calibrated negative pressure range for the first time. At this time, after regressing by a preset step of 5%, the current drive duty cycle is determined to be the base drive duty cycle. For example, when the drive duty cycle first exceeds the calibrated negative pressure range, it may be 30%. After regressing by a preset step of 5%, the base drive duty cycle is determined to be 25%. At the same time, the measured nasal negative pressure value at this time or when the drive duty cycle is increased by 5% step by step before is recorded, which is the measured nasal negative pressure value corresponding to the base drive duty cycle.

[0038] S1303. Based on the basic drive duty cycle as a reference, adjust the basic drive duty cycle and measure the nasal cavity negative pressure value. Calculate the adjusted basic drive duty cycle and the duty cycle change of the basic drive duty cycle, as well as the negative pressure difference between the adjusted measured nasal cavity negative pressure value and the measured nasal cavity negative pressure value corresponding to the basic drive duty cycle. Determine the basic pressure ramp slope based on the ratio of the duty cycle change to the negative pressure difference.

[0039] Optionally, using the base drive duty cycle as a reference, the base drive duty cycle is adjusted and the nasal negative pressure value is measured. For example, the adjustment range can be one or more, such as 3%, 5%, 7%, 10%, etc. For example, taking 3% as an example, the base drive duty cycle is adjusted to 25% + 3%. Then, the adjusted base drive duty cycle and the duty cycle change of the base drive duty cycle (i.e., 3%) are calculated, as well as the negative pressure difference (AB) between the adjusted measured nasal negative pressure value (e.g., A) and the measured nasal negative pressure value corresponding to the base drive duty cycle (e.g., B). The base pressure ramp slope is determined based on the ratio of duty cycle change to negative pressure difference, 3% / (AB). In some embodiments, multiple base pressure ramp slopes can be calculated based on the above method using several adjustment ranges, and then the average slope is taken as the final base pressure ramp slope, improving the stability and accuracy of the base pressure ramp slope.

[0040] S1304. Determine the safe negative pressure threshold based on the maximum value of the calibration pressure negative pressure range and the maximum measured nasal negative pressure value in the calibration process, or use the preset safe negative pressure as the safe negative pressure threshold.

[0041] In one implementation, a safety negative pressure, such as 65 kPa, can be preset as a safety negative pressure threshold.

[0042] In one implementation, the maximum value between the maximum value of the calibration pressure negative pressure range and the maximum measured nasal negative pressure value during the calibration process is determined as a candidate safe negative pressure threshold. For example, if the calibration pressure negative pressure range is (20 kPa, 35 kPa), the corresponding maximum value is 35 kPa. The maximum measured nasal negative pressure value during the calibration process refers to the largest measured nasal negative pressure value among all nasal negative pressure values ​​obtained from the start of the calibration process to S1304, for example, 40 kPa. In this case, the maximum value of 40 kPa is determined as the candidate safe negative pressure threshold. Then, the product of the candidate safe negative pressure threshold and a safety factor (greater than 1) is used as the safe negative pressure threshold. For example, if the safety factor is 1.5, the candidate safe negative pressure threshold is determined to be 60 kPa.

[0043] In one implementation, step S200 includes steps S210-S230: S210. Determine the measured nasal negative pressure value corresponding to the basic drive duty cycle, and determine the suction adjustment line based on the basic drive duty cycle, the measured nasal negative pressure value corresponding to the basic drive duty cycle, and the basic pressure ramp.

[0044] Optionally, the measured nasal negative pressure value corresponding to the basic drive duty cycle is determined, as described in S1302, for example, the measured nasal negative pressure value corresponding to a basic drive duty cycle of 25%, which may be 35 kPa. Then, the suction adjustment line is determined based on the basic drive duty cycle, the measured nasal negative pressure value corresponding to the basic drive duty cycle, and the basic pressure ramp.

[0045] S220. Based on the low negative pressure threshold and the safe negative pressure threshold, the suction adjustment line is divided into ranges to obtain the low negative pressure range (below the low negative pressure threshold), the normal negative pressure range (between the low negative pressure threshold and the safe negative pressure threshold), and the ultra-high negative pressure range (above the safe negative pressure threshold).

[0046] For example, the low negative pressure threshold can be configured in advance. In this embodiment, the measured nasal negative pressure value corresponding to the basic drive duty cycle is used as the low negative pressure threshold. For ease of explanation, the above example is used as an example. For example, the measured nasal negative pressure value of 35 kPa corresponding to the basic drive duty cycle of 25% is used as the low negative pressure threshold, and it is assumed that the low negative pressure threshold is 65 kPa.

[0047] Therefore, based on the low negative pressure threshold and the safe negative pressure threshold, the negative pressure range of the suction adjustment line is divided into the following ranges: the low negative pressure range (<35kPa) which is less than the low negative pressure threshold, the normal negative pressure range [35kPa, 65kPa] between the low negative pressure threshold and the safe negative pressure threshold, and the ultra-high negative pressure range (>65kPa) which is greater than the safe negative pressure threshold.

[0048] S230 configures the corresponding motor drive duty cycle for low negative pressure range, normal negative pressure range and ultra-high negative pressure range respectively, and obtains the mapping relationship between negative pressure range and motor drive duty cycle.

[0049] Optionally, the driving duty cycle of the motor is configured for the low negative pressure range (<35kPa), for example, the driving duty cycle is 25% of the basic driving duty cycle; the driving duty cycle of the motor is configured for the ultra-high negative pressure range (>65kPa), for example, the driving duty cycle is a preset ratio of the theoretical maximum driving duty cycle, such as 70%, which is recorded as the maximum limiting driving duty cycle: driving duty cycle 70% (this application assumes that the driving duty cycle of 70% is on the suction adjustment line, if not, the driving duty cycle closest to 70% on the suction adjustment line is taken); for the normal negative pressure range [35kPa, 65kPa], the driving duty cycle of the motor is configured, which is between the basic driving duty cycle and the maximum limiting driving duty cycle, for example, the driving duty cycle is 25% to 70% (based on the linear change of the suction adjustment line), and finally the mapping relationship between the negative pressure range and the driving duty cycle of the motor is obtained.

[0050] In one implementation, in step S300, during nasal suction, the nasal cavity negative pressure value is acquired in real time via a pressure sensor, and a millisecond-level anomaly response is achieved in conjunction with a processor. The acquisition frequency is determined based on the sampling frequency, and the moment when the nasal cavity negative pressure value is acquired is the sampling moment. After acquiring the nasal cavity negative pressure value, based on the negative pressure range defined in step S200, it can be determined which negative pressure range the nasal cavity negative pressure value falls within. For example, if the nasal cavity negative pressure value is 50 kPa, then the normal negative pressure range is determined as the target negative pressure range.

[0051] In one implementation, step S300, which determines the nasal cavity state based on the nasal cavity negative pressure value, includes: S310. If the nasal cavity negative pressure value is greater than or equal to the high negative pressure threshold, calculate the degree of change of nasal cavity negative pressure based on the nasal cavity negative pressure value obtained in real time at adjacent sampling times.

[0052] For example, the high negative pressure threshold is 40 kPa. For instance, if the nasal cavity negative pressure value is 50 kPa > 40 kPa, then the degree of change in nasal cavity negative pressure is calculated based on the nasal cavity negative pressure values ​​obtained in real time at adjacent sampling times. For example, the degree of change in nasal cavity negative pressure can be the change in the negative pressure amplitude or the rate of change of the negative pressure value.

[0053] S320. When the degree of change in nasal negative pressure is greater than or equal to the degree threshold, the nasal cavity status is determined to be a state of unblocked state.

[0054] Optionally, the degree threshold is set according to the degree of change in nasal negative pressure, such as an amplitude change threshold or a change rate threshold. When the degree of change in nasal negative pressure is greater than or equal to the degree threshold, the nasal state is determined to be in a state of blockage relief. In this state, the blockage relief means that at least a portion of the viscous secretions has been removed during nasal suction, resulting in a rapid decrease in resistance in a short period. If the amplitude or rate of change in negative pressure is large, a release adjustment process needs to be triggered to eliminate the abrupt pressure sensation after the removal of viscous secretions. This facilitates the secondary suction of residual secretions under safe conditions, avoiding adjustments based on mapping relationships, which could easily cause a sudden drop in suction force, triggering a startle reflex in infants and hindering the continued suction of residual viscous secretions.

[0055] S330. If the nasal cavity negative pressure value is less than the high negative pressure threshold or the nasal cavity negative pressure change value is less than the degree threshold, the nasal cavity state is determined to be blocked.

[0056] Optionally, if the nasal negative pressure value is less than the high negative pressure threshold or the nasal negative pressure change value is less than the degree threshold, the nasal cavity is determined to be in a blocked state. That is, it is considered that the viscous secretions have not been suctioned or the suctioned part is too small to cause a sudden drop in resistance. In this case, the suction force can be adjusted normally based on the mapping relationship.

[0057] In one implementation, if the nasal cavity is blocked in step S400, the driving duty cycle is adjusted to adjust the suction power according to the target negative pressure range and mapping relationship, including steps S410-S430: S410 When the target negative pressure range is the low negative pressure range, maintain the basic drive duty cycle according to the mapping relationship to adjust the suction power.

[0058] Optionally, when the target negative pressure range is a low negative pressure range, such as <35kPa, the basic drive duty cycle of 25% can be determined according to the mapping relationship to adjust the suction.

[0059] S420. When the target negative pressure range is the normal negative pressure range, adjust the drive duty cycle to adjust the suction based on the part corresponding to the normal negative pressure range in the suction adjustment line according to the mapping relationship.

[0060] Optionally, when the target negative pressure range is the normal negative pressure range, such as [35kPa, 65kPa], according to the mapping relationship, it can be known that the part corresponding to the normal negative pressure range in the suction adjustment line, that is, within the range of 25% to 70%, is linearly adjusted based on the basic pressure rise slope, thereby adjusting the drive duty cycle to adjust the suction.

[0061] For example, in one implementation, when the target negative pressure range is the normal negative pressure range, a unique drive duty cycle corresponding to the nasal negative pressure value within the range of 25% to 70% (e.g., 60%) is found based on the portion of the nasal negative pressure value corresponding to the normal negative pressure range (i.e., the suction adjustment line) to adjust the suction. Alternatively, in one implementation, the normal negative pressure range can be further divided based on a preset negative pressure interval (exemplarily 5 kPa) to determine sub-negative pressure ranges, and a unique drive duty cycle corresponding to 25% to 70% can be configured for each sub-negative pressure range, as shown in Table 1. Assuming the base pressure ramp slope is 1.5, it is possible to determine which specific sub-negative pressure range the nasal negative pressure value falls within and the corresponding drive duty cycle to adjust the suction.

[0062] Table 1

[0063] S430: When the target negative pressure range is the ultra-high negative pressure range, the driving duty cycle is adjusted to adjust the suction power according to the mapping relationship and the preset ratio of the theoretical maximum driving duty cycle.

[0064] Optionally, when the target negative pressure range is an ultra-high negative pressure range, >65kPa, according to the mapping relationship, the driving duty cycle can be adjusted to adjust the suction power by using the preset ratio of the theoretical maximum driving duty cycle, such as a driving duty cycle of 70%.

[0065] In one implementation, steps S440-S450 are also included: S440. When the target negative pressure range is an ultra-high negative pressure range and the duration is greater than the continuous threshold, the drive duty cycle is forcibly reduced to the protection drive duty cycle.

[0066] Optionally, when the target negative pressure range is the ultra-high negative pressure range, the duration of being in the ultra-high negative pressure range is recorded. If the duration is greater than the duration threshold, such as 2 seconds, it may be that the suction head has been adsorbed onto the nasal cavity wall or mucosal surface, rather than simply acting on secretions and airflow. This is because clinical observations show that when normally aspirating secretions, even with high resistance, the negative pressure will fluctuate or slowly decrease as the secretions are gradually cleared. However, when the mucosa is accidentally aspirated, the suction head is completely sealed by soft tissue, and the negative pressure will rise sharply and remain at a high level. Therefore, in order to ensure safety and provide the highest priority safety defense, the drive duty cycle is forcibly reduced to the protection drive duty cycle to quickly release the negative pressure and provide an audible and visual alarm through the audio-visual unit. For example, the protection drive duty cycle is 5% or 10%.

[0067] S450: After a preset time, the drive duty cycle is restored to the basic drive duty cycle.

[0068] Optionally, after a preset time, such as 2 seconds, the drive duty cycle is restored to the basic drive duty cycle, so that the negative pressure returns to the normal range and the suction control returns to normal.

[0069] In one implementation, if the nasal cavity is in a cleared state during step S400, a release adjustment process is triggered to adjust the drive duty cycle to adjust the suction power, including steps S401-S403: S401. If the nasal cavity is in a state of unblocked state, reduce the drive duty cycle to the residual drive duty cycle; the residual drive duty cycle is greater than the basic drive duty cycle.

[0070] Optionally, if the nasal cavity is in a blocked state, the release adjustment process is triggered, the drive duty cycle is latched and recorded, the transition timer is started, the normal pressure tracking logic (i.e., the logic of adjusting the drive duty cycle to adjust the suction power according to the target negative pressure range and mapping relationship) is paused, and the drive duty cycle is reduced to the residual drive duty cycle, which is greater than the basic drive duty cycle. For example, the residual drive duty cycle is 35%.

[0071] S402. Maintain a preset time length and determine the change state of the nasal negative pressure value based on the nasal negative pressure value obtained in real time at several sampling times.

[0072] Optionally, a preset time length, such as 1-2 seconds, is maintained, and the change state of the nasal negative pressure value is determined based on the nasal negative pressure value obtained in real time at several sampling times. For example, the change state is determined to be maintained, decreasing (trend), or increasing (trend).

[0073] S403. When the change state is to remain or decrease, the drive duty cycle is gradually reduced to the basic drive duty cycle. When the change state is to increase, the adjustment process ends and the nasal cavity state is determined to be blocked.

[0074] Optionally, when the change state is to maintain or decrease, the drive duty cycle is gradually reduced to the base drive duty cycle. The gradual reduction can be done by a preset step or a preset percentage decrease (for example, it can be reduced by 5% per second). When the change state is to increase, the adjustment process ends, the nasal cavity state is determined to be blocked, and the control process of the blocked state in S400 is re-entered. The drive duty cycle is adjusted to adjust the suction power according to the target negative pressure range and the mapping relationship.

[0075] In one embodiment, the suction adjustment method of the nasal aspirator according to this application may further include steps S510-S530: S510, in response to a power-off or update command, triggers a self-learning process to collect characteristic data during the nasal suction process.

[0076] Optionally, a power-off or update command can be triggered via voice command, or by the touchscreen or buttons on the nasal aspirator, thereby initiating a self-learning process to collect feature data during the nasal aspiration process. Optionally, the feature data includes, but is not limited to, the total duration of the nasal aspiration process, the average nasal negative pressure value corresponding to the real-time acquired nasal negative pressure value, the maximum nasal negative pressure value, the number of manual interventions (e.g., interventions made by the user through voice commands, touchscreen, or buttons when they feel it is not suitable, such as exiting AI mode, re-entering, or removing the suction head; the number of interventions reflects the degree of dissatisfaction), the number of alarms, the number of times the safe negative pressure threshold is exceeded, etc.

[0077] S520. Based on the characteristic data, determine the evaluation results of the nasal suction process.

[0078] Optionally, taking the number of manual interventions, the number of times the safe negative pressure threshold is exceeded, and the number of alarms as examples, a weighted calculation is performed using the corresponding weights, and the calculated score is used as the evaluation result of the nasal suction process. The evaluation result can also be called the "discomfort index". The higher the evaluation result, the more dissatisfied and uncomfortable the user is.

[0079] S530. Based on the evaluation results, update the current suction control parameters and store the updated suction control parameters in the memory.

[0080] Optionally, based on the evaluation results, the current suction control parameters are updated and stored in the memory for easy use next time, thereby enabling autonomous learning and adjustment. This is beneficial for gradually shifting from "adaptation" to "personalized adaptation" for users, which is more conducive to improving user satisfaction. It can adapt to changes in the baby's growth and health status, continuously optimize suction response characteristics, or re-trigger the calibration process based on actual needs.

[0081] It should be noted that the larger the evaluation result, the larger the corresponding adjustment range, and the smaller the evaluation result, the smaller the corresponding adjustment range. For example, if the evaluation result is less than the first score threshold, no adjustment is needed. If the evaluation result is greater than or equal to the first score threshold but less than the second score threshold, moderate adjustment (such as the first range) is possible. For example, a high number of manual interventions, the number of times the safety negative pressure threshold is exceeded, and the number of alarms are essentially due to excessive suction power and a low safety negative pressure threshold. Therefore, the basic drive duty cycle, basic boost slope, and safety negative pressure threshold should be moderately reduced. However, if the evaluation result is greater than the second score threshold, a significant adjustment (such as the second range) should be made, significantly reducing the basic drive duty cycle, basic boost slope, and safety negative pressure threshold.

[0082] In one embodiment, the suction adjustment method of the nasal aspirator of this application embodiment may further include step S501: when the stored content does not have suction control parameters, a fixed suction process is executed instead of a calibration process, the nasal cavity negative pressure value is matched with the corresponding preset level, and the drive duty cycle is adjusted to adjust the suction according to the adjustment rules corresponding to the matched preset level.

[0083] In one implementation, when the stored content does not have suction control parameters, a fixed suction process can be executed instead of a calibration process. For example, the default execution of either a calibration process or a fixed suction process can be preset. If the default is to execute a fixed suction process, then the fixed suction process is executed. After a certain number of uses, a prompt is triggered to ask the user whether to execute the calibration process, allowing the user to choose. Alternatively, if it is determined that the stored content does not have suction control parameters, the user is prompted to choose between a calibration process or a fixed suction process, without any specific limitation.

[0084] Optionally, during the fixed suction process, the nasal cavity negative pressure value is matched with a corresponding preset level. Exemplary preset levels include low, medium, and high. The drive duty cycle is adjusted to adjust the suction power according to the adjustment rules corresponding to the matched preset level. Table 2 shows examples; the specific values ​​of the negative pressure range, duration, and drive duty cycle for different levels do not constitute a limitation on this application, and other embodiments can be adjusted as needed. For example, if the nasal cavity negative pressure value is 35 kPa, the matched preset level is low, and the drive duty cycle is adjusted to adjust the suction power using the adjustment rules corresponding to low level.

[0085] Table 2

[0086] Reference Figure 2 The diagram illustrates a structural block diagram of a nasal aspirator according to an embodiment of this application. The nasal aspirator may include: The response module is used to determine the suction control parameters in response to the start command; A module is established to create a mapping relationship between the negative pressure range and the motor's drive duty cycle based on the suction control parameters. The determination module is used to acquire the nasal cavity negative pressure value in real time during nasal suction, and determine the nasal cavity status and target negative pressure range based on the nasal cavity negative pressure value; The adjustment module is used to adjust the drive duty cycle to adjust the suction power if the nasal cavity is blocked, based on the target negative pressure range and mapping relationship. If the nasal cavity is unblocked, it triggers the release adjustment process and adjusts the drive duty cycle to adjust the suction power.

[0087] In one implementation, the adjustment module is further configured to: When the target negative pressure range is an ultra-high negative pressure range and the duration is greater than the continuous threshold, the drive duty cycle is forcibly reduced to the protection drive duty cycle; After a preset time, the drive duty cycle will be restored to the basic drive duty cycle.

[0088] In one implementation, the adjustment module is further configured to: In response to a shutdown or update command, a self-learning process is triggered to collect feature data during the nasal suction process; Based on the characteristic data, determine the evaluation results of the nasal suction process; Based on the evaluation results, update the current suction control parameters and store the updated suction control parameters in memory; or, When the stored content does not have suction control parameters, the fixed suction process is executed instead of the calibration process. The nasal negative pressure value is matched with the corresponding preset level. According to the adjustment rules corresponding to the matched preset level, the drive duty cycle is adjusted to adjust the suction.

[0089] The functions of each module in the nasal aspirator of this application embodiment can be found in the corresponding descriptions in the above methods, and will not be repeated here.

[0090] Reference Figure 3 The diagram illustrates a structural block diagram of an electronic device according to an embodiment of this application. The electronic device includes a memory 310 and a processor 320. The memory 310 stores instructions that can be executed on the processor 320. The processor 320 loads and executes these instructions to implement the suction adjustment method of the nasal aspirator in the above embodiment. The number of memories 310 and processors 320 can be one or more.

[0091] In one embodiment, the electronic device further includes a communication interface 330 for communicating with external devices and exchanging data. If the memory 310, processor 320, and communication interface 330 are implemented independently, they can be interconnected via a bus to communicate with each other. This bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. This bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 3 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0092] Optionally, in a specific implementation, if the memory 310, processor 320 and communication interface 330 are integrated on a single chip, the memory 310, processor 320 and communication interface 330 can communicate with each other through an internal interface.

[0093] This application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the suction adjustment method for the nasal aspirator provided in the above embodiments.

[0094] This application also provides a chip, which includes a processor for calling and executing instructions stored in a memory, causing a communication device with the chip installed to perform the method provided in this application.

[0095] This application also provides a chip, including: an input interface, an output interface, a processor, and a memory. The input interface, output interface, processor, and memory are connected through an internal connection path. The processor is used to execute code in the memory. When the code is executed, the processor is used to execute the method provided in the application embodiment.

[0096] It should be understood that the aforementioned processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. General-purpose processors can be microprocessors or any conventional processor. It is worth noting that the processor can be a processor supporting the Advanced Reduced Instruction Set Computing (RISC) machine (ARM) architecture.

[0097] Further, optionally, the aforementioned memory may include read-only memory and random access memory, and may also include non-volatile random access memory. The memory may be volatile or non-volatile, or may include both. Non-volatile memory may include read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory may include random access memory (RAM), which serves as an external cache. Many forms of RAM are available by way of example, but not limitation. Examples include static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM).

[0098] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the flow or function according to this application is generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another.

[0099] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," and "specific example" refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0100] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0101] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process. Furthermore, the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functionality involved.

[0102] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus or device (such as a computer-based system, a processor-included system or other system that can fetch and execute instructions from, an instruction execution system, apparatus or device).

[0103] It should be understood that various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. All or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware, the program being stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiments.

[0104] Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. This storage medium can be a read-only memory, a disk, or an optical disk, etc.

[0105] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for adjusting the suction power of a nasal aspirator, characterized in that, include: In response to the start command, determine the suction control parameters; Based on the suction control parameters, a mapping relationship is established between the negative pressure range and the motor's drive duty cycle; The nasal cavity negative pressure value is acquired in real time during nasal inhalation, and the nasal cavity status and target negative pressure range are determined based on the nasal cavity negative pressure value. If the nasal cavity is blocked, the drive duty cycle is adjusted to adjust the suction power according to the target negative pressure range and mapping relationship. If the nasal cavity is unblocked, the unblocking adjustment process is triggered, and the drive duty cycle is adjusted to adjust the suction power.

2. The suction adjustment method for the nasal aspirator according to claim 1, characterized in that: The process of determining the suction control parameters in response to the start command includes: In response to the boot command, the contents of the memory are detected; If the stored content contains suction control parameters, read the memory to determine the suction control parameters; If the stored content does not have suction control parameters, execute the calibration process to determine the suction control parameters; The suction control parameters include the basic drive duty cycle, the basic boost slope, and the safety negative pressure threshold.

3. The suction adjustment method for the nasal aspirator according to claim 2, characterized in that: When the stored content does not have suction control parameters, the calibration process is executed to determine the suction control parameters, including: When the stored content does not have suction control parameters, a calibration process is executed to safely drive the duty cycle control motor to start. Based on the safe drive duty cycle, the drive duty cycle is gradually increased in preset steps. At each increase in the drive duty cycle, the nasal cavity negative pressure value is measured and compared with the calibrated negative pressure range. When the measured nasal cavity negative pressure value exceeds the calibrated negative pressure range for the first time, the preset steps are reversed and the current drive duty cycle is determined as the base drive duty cycle. Using the basic drive duty cycle as a reference, the basic drive duty cycle is adjusted and the nasal cavity negative pressure value is measured. The adjusted basic drive duty cycle and the duty cycle change of the basic drive duty cycle are calculated, as well as the negative pressure difference between the adjusted measured nasal cavity negative pressure value and the measured nasal cavity negative pressure value corresponding to the basic drive duty cycle. The basic pressure ramp slope is determined based on the ratio of the duty cycle change to the negative pressure difference. The safe negative pressure threshold is determined based on the maximum value of the calibration pressure negative pressure range and the maximum measured nasal negative pressure value in the calibration process, or the preset safe negative pressure is used as the safe negative pressure threshold.

4. The suction adjustment method for the nasal aspirator according to claim 2, characterized in that: The process of establishing a mapping relationship between the negative pressure range and the motor's drive duty cycle based on suction control parameters includes: Determine the measured nasal negative pressure value corresponding to the basic drive duty cycle, and determine the suction adjustment line based on the basic drive duty cycle, the measured nasal negative pressure value corresponding to the basic drive duty cycle, and the basic pressure ramp. Based on the low negative pressure threshold and the safe negative pressure threshold, the suction adjustment line is divided into ranges to obtain the low negative pressure range below the low negative pressure threshold, the normal negative pressure range between the low negative pressure threshold and the safe negative pressure threshold, and the ultra-high negative pressure range above the safe negative pressure threshold. The drive duty cycle of the motor is configured for the low negative pressure range, normal negative pressure range, and ultra-high negative pressure range respectively, so as to obtain the mapping relationship between the negative pressure range and the drive duty cycle of the motor.

5. The suction adjustment method for the nasal aspirator according to claim 4, characterized in that: The step of adjusting the drive duty cycle to adjust the suction power based on the target negative pressure range and mapping relationship includes: When the target negative pressure range is the low negative pressure range, the basic drive duty cycle is maintained according to the mapping relationship to adjust the suction power; When the target negative pressure range is the normal negative pressure range, according to the mapping relationship, adjust the drive duty cycle to adjust the suction by adjusting the part of the normal negative pressure range in the suction adjustment line; When the target negative pressure range is the ultra-high negative pressure range, the driving duty cycle is adjusted according to the mapping relationship and the preset ratio of the theoretical maximum driving duty cycle to adjust the suction.

6. The suction adjustment method for the nasal aspirator according to claim 5, characterized in that: The method further includes: When the target negative pressure range is an ultra-high negative pressure range and the duration is greater than the continuous threshold, the drive duty cycle is forcibly reduced to the protection drive duty cycle; After a preset time, the drive duty cycle will be restored to the basic drive duty cycle.

7. The suction adjustment method for the nasal aspirator according to claim 1, characterized in that: Determining the nasal cavity condition based on the negative nasal pressure includes: If the nasal cavity negative pressure value is greater than or equal to the high negative pressure threshold, the degree of change of nasal cavity negative pressure is calculated based on the nasal cavity negative pressure value obtained in real time at adjacent sampling times. When the degree of change in nasal negative pressure is greater than or equal to the degree threshold, the nasal state is determined to be a state of unblocked nasal cavity. If the nasal cavity negative pressure value is less than the high negative pressure threshold or the nasal cavity negative pressure change value is less than the degree threshold, the nasal cavity is determined to be in a blocked state.

8. The suction adjustment method for the nasal aspirator according to claim 2, characterized in that: If the nasal cavity is in a cleared state, the adjustment process is triggered, and the drive duty cycle is adjusted to adjust the suction power, including: If the nasal cavity is in a cleared state, reduce the drive duty cycle to the residual drive duty cycle; the residual drive duty cycle is greater than the base drive duty cycle. Maintain a preset time length and determine the change state of nasal negative pressure value based on the nasal negative pressure value obtained in real time at several sampling times; When the change state is to remain or decrease, the drive duty cycle is gradually reduced to the base drive duty cycle. When the change state is to increase, the adjustment process ends, and the nasal cavity state is determined to be blocked.

9. The suction adjustment method for the nasal aspirator according to claim 2, characterized in that: The method further includes: In response to a shutdown or update command, a self-learning process is triggered to collect feature data during the nasal suction process; Based on the characteristic data, determine the evaluation results of the nasal suction process; Based on the evaluation results, update the current suction control parameters and store the updated suction control parameters in memory; or, When the stored content does not have suction control parameters, the fixed suction process is executed instead of the calibration process. The nasal negative pressure value is matched with the corresponding preset level. According to the adjustment rules corresponding to the matched preset level, the drive duty cycle is adjusted to adjust the suction.

10. A nasal aspirator, characterized in that, include: The response module is used to determine the suction control parameters in response to the start command; A module is established to create a mapping relationship between the negative pressure range and the motor's drive duty cycle based on the suction control parameters. The determination module is used to acquire the nasal cavity negative pressure value in real time during nasal suction, and determine the nasal cavity status and target negative pressure range based on the nasal cavity negative pressure value; The adjustment module is used to adjust the drive duty cycle to adjust the suction power if the nasal cavity is blocked, based on the target negative pressure range and mapping relationship. If the nasal cavity is unblocked, it triggers the release adjustment process and adjusts the drive duty cycle to adjust the suction power.

Images