Nasal cavity nursing suction tool

Abstract

The invention discloses a nasal cavity nursing suction tool, and belongs to the technical field of medical instrument design. The multi-mode nasal aspirator is composed of a nasal aspirator body and a multi-mode suction tool. The main body is used for driving and controlling nasal suction and atomization of the suction tool and is connected with the suction tool through a detachable interface; the suction tool is provided with an appearance structure matched with a nasal cavity, and a suction head part, a supporting body and a connecting part form a hollow pipeline structure. The suction head part is provided with a flexible umbrella-shaped nasal cavity adaptive structure, the rear end of the suction head part is connected with a bendable rod-shaped support body, and the tail end of the support body is a connecting part rigidly connected with the main body; the center of the end of the suction head portion is provided with an opening, a plurality of atomizing micropores forming an included angle larger than 30 degrees with the center opening in the axial direction are formed in the periphery of the center opening, and the center opening and the micropores are provided with independent channels and connected with the body. The nasal cavity cleaning device has the deep cavity cleaning capacity, the characteristics of deep secretions can be detected in real time through the flexible sensing suction head capable of penetrating into the nasal cavity, and the nasal cavity is safely and thoroughly cleaned by adopting the personalized nursing procedure of atomization wetting and negative pressure suction removal in sequence.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of medical device design, and particularly relates to a nasal cavity nursing device with deep cavity operation and human nasal cavity adaptation. BACKGROUND

[0002] Current nasal cavity nursing devices have relatively single functions. Traditional negative pressure nose suction devices remove secretions through a physical method (CN202411786997.8), but the effect is poor for dry or viscous secretions, and improper operation can easily damage the nasal mucosa. On the other hand, intelligent atomizers can moisten the nasal cavity (https: / / www.shihuo.cn / article / detail / 118193.html), but lack the ability to remove secretions.

[0003] The suction head of the existing negative pressure nose suction device generally has design defects: most of them are hard or semi-hard plastic, with fixed shape and unable to adapt to the physiological curvature of the nasal cavity, so they can only clean the front part of the nasal cavity, and have no effect on stubborn secretions in the rear part of the nasal cavity. This not only leads to incomplete cleaning, but also may cause user discomfort or damage due to improper operation. Although there are some flexible suction heads, their flexibility usually comes at the expense of support, and they cannot achieve controllable deep cleaning. SUMMARY

[0004] The present application discloses a nasal cavity nursing suction device. The purpose of the present application is to provide a device with deep cavity cleaning capability, which can detect the physical properties of deep secretions in real time through a disposable flexible sensing suction head that can enter the nasal cavity, automatically decide and trigger a personalized nursing program of "first atomization and moistening, then negative pressure suction", and achieve safe and thorough cleaning of the whole nasal cavity including the rear part of the nasal cavity.

[0005] The present application is achieved by the following technical solutions:

[0006] A nasal cavity nursing suction device is composed of a nose suction device main body and a multi-modal suction device. The nose suction device main body provides driving and control for the multi-modal suction device for nose suction and atomization, and is connected to the multi-modal suction device through a detachable interface. The multi-modal suction device has a nasal cavity-adapted shape structure, and is composed of a suction head, a support body and a connecting part to form a hollow pipeline structure. The suction head has a flexible umbrella-shaped nasal cavity adaptation structure, the rear end of the suction head is connected to a bendable rod-shaped support body, and the end of the support body is connected to the connecting part which is rigidly connected to the nose suction device main body.

[0007] The end of the suction head is provided with a central opening, and the rear end of the central opening is provided with an independent suction channel connected to the nose suction device main body. A plurality of atomization micro-holes are arranged around the central opening, and the atomization micro-holes are arranged at an angle greater than 30 degrees with the axis of the central opening. The atomization micro-holes are provided with independent atomization channels connected to the nose suction device main body.

[0008] The end of the suction head is provided with a central opening, and the rear end of the central opening is provided with an independent suction channel connected to the nose suction device main body. A plurality of atomization micro-holes are arranged around the central opening, and the atomization micro-holes are arranged at an angle greater than 30 degrees with the axis of the central opening. The atomization micro-holes are provided with independent atomization channels connected to the nose suction device main body.

[0009] Further, the suction head is made of flexible material; the umbrella-shaped soft head, the middle sealing ring, and the umbrella-shaped tail form a flexible nasal cavity fitting structure with gradually increasing diameter from the front end to the rear end; the suction head has a Shore hardness of 10-20.

[0010] Further, the umbrella-shaped soft head has an arc-shaped or hemispherical structure, and a smooth or slightly rough surface; the umbrella-shaped soft head is provided with an optical viscosity sensor and is connected to the control mechanism of the nasal aspirator main body.

[0011] Further, the sealing ring and the umbrella-shaped tail form a flexible sealing structure with the nasal threshold.

[0012] Further, the support body is a flexible navigation rod with a Shore hardness of 25-35.

[0013] Further, the connecting part is firmly connected to the nasal aspirator main body in a buckle or screwing manner, and is integrated with a pipeline and an electrical contact or a connecting cable, to realize sensor signal transmission and docking of the atomization and suction channels.

[0014] Further, the pressure flow rate sensor is arranged in the suction channel of the multi-modal suction tool and is connected to the control mechanism of the nasal aspirator main body.

[0015] The nasal cavity care suction tool has the following advantages:

[0016] Safety and comfort: intelligent suction force control based on viscosity sensing and flexible suction head design can effectively avoid damage to the nasal mucosa and improve comfort.

[0017] More efficient and thorough cleaning: the combination of atomization and suction functions and structures is particularly suitable for handling the viscous or dry scab-like secretions commonly seen in the elderly population, and the innovative deep cavity suction head design can effectively remove stubborn secretions in the back of the nasal cavity, solving the fundamental problem of traditional devices.

[0018] Health protection: the use of replaceable disposable design fundamentally eliminates cross-infection, and is particularly suitable for multiple or multiple use in family, nursing home and other scenes.

[0019] Integration and humanization: soft silicone material and deep cleaning experience bring quality improvement compared with hard plastic, and a device integrates two functions of atomization and negative pressure suction, simplifying the nursing process and optimizing user experience. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a schematic diagram of the external design of the nasal aspirator.

[0021] Figure 2 is a schematic diagram of the nasal cavity care suction tool.

[0022] Figure 3 is a schematic diagram of a nasal cavity nursing suction device simulating a nasal cavity passage.

[0023] Figure 4 is a schematic diagram of a nasal suction device control method using the nasal cavity nursing suction device.

[0024] In the figure, 1 is a multi-modal suction device, 2 is a nasal suction device main body, 11 is a suction head, 12 is a support body, 13 is a connecting part, 111 is an umbrella-shaped soft head, 112 is a sealing ring, and 113 is an umbrella-shaped soft tail. DETAILED DESCRIPTION

[0025] The application will be further described below in conjunction with specific embodiments, which are further illustrations of the principles of the application and do not limit the application in any way. The same or similar technologies as the application do not exceed the scope of protection of the application.

[0026] The nasal cavity nursing suction device is used in a smart nasal suction device, which is composed of a nasal suction device main body and a multi-modal suction device. The nasal suction device main body provides driving and control for nasal suction and atomization of the multi-modal suction device and is connected to the multi-modal suction device through a detachable interface.

[0027] The nasal suction device main body is provided with a nasal suction mechanism, an atomization mechanism, and a control mechanism. The nasal suction mechanism includes a pressure flow rate sensor, a dirt tank, and a connecting pipeline. The atomization mechanism includes an atomization liquid tank, an atomization electromagnetic valve, a piezoelectric atomization assembly, and a connecting pipeline. The control mechanism includes a main electromagnetic valve, a micro air pump, and a controller.

[0028] The multi-modal suction device has a nasal cavity adaptive shape structure and is composed of a hollow pipeline structure suction device including a suction head, a support body, and a connecting part. The suction head has a flexible umbrella-shaped nasal cavity adaptive structure. The rear end of the suction head is connected to a bendable rod-shaped support body. The end of the support body is a connecting part rigidly connected to the nasal suction device main body. The suction head is provided with an optical viscosity sensor and is signal-connected to the controller.

[0029] The end of the suction head is provided with a central opening. The rear end of the central opening is provided with a separate dirt suction channel and is sequentially connected to the dirt tank, the main electromagnetic valve, and the micro air pump suction end. A plurality of atomization micro air holes are arranged around the central opening at an angle greater than 30 degrees with respect to the central opening axis. The atomization micro air holes are provided with independent atomization channels and are sequentially connected to the atomization liquid tank, the main electromagnetic valve, and the micro air pump output end through the atomization electromagnetic valve. The piezoelectric atomization assembly is arranged in the atomization channel at the front end of the atomization electromagnetic valve.

[0030] The steps of using the above-mentioned nasal cavity nursing suction device are as follows:

[0031] S1, initialization: the user wears the suction head and is ready to start the nasal suction device.

[0032] S2, optical viscosity sensor detection: detect the viscosity of nasal secretions and send a signal to the controller;

[0033] S3, control mechanism decision: when the viscosity of the secretions is detected to exceed the preset threshold, the atomization mode is triggered, and the atomization parameters are set according to the viscosity intensity;

[0034] S4, execute atomization: the controller controls the opening of the atomization electromagnetic valve, starts the micro air pump forward rotation, opens the piezoelectric atomization sheet and the main electromagnetic valve output end, and atomizes and dilutes the nasal spray through the atomization micro air hole; until the optical viscosity sensor detects that the viscosity of the secretions meets the set value, stop atomization, close the piezoelectric atomization sheet and the atomization electromagnetic valve;

[0035] S5, execute nose suction: the controller opens the main electromagnetic valve suction end, receives the pressure flow rate sensor monitoring data, starts the micro air pump reverse rotation, and removes the nasal secretions through the central opening at the end of the suction head;

[0036] S6, close: the pressure flow rate sensor detects the suction air flow pressure, and closes the nose suction device after the suction air flow pressure stabilizes for a set time, or manually closes the nose suction device.

[0037] The following will be described in detail the components of the nose suction device of the present application and the control thereof.

[0038] The multi-modal suction device of the present application is a composite terminal actuator integrating sensing, treatment and suction functions to realize the functions of external rigid-flexible combination and safe navigation, and internal cavity precise medium delivery.

[0039] I. Overall configuration of multi-modal suction device

[0040] A three-section functional partition is adopted, and the suction device is composed of a suction head, a support body and a connecting part to form a hollow pipeline structure. The multi-modal suction device is divided into three physical and functional areas to ensure that the whole process from the outside of the nasal cavity to the deep part of the nasal cavity is safe and effective.

[0041] 1. Suction head: functional execution and perception area, as the part directly contacting the sensitive nasal mucosa, bionic, adaptive and multifunctional integration.

[0042] 1.1 Material and hardness, Shore hardness 10-20: the Shore hardness 10-20 is comparable to the softest silicone or gel of the human body, which is lower than the softness of the auricle. It can ensure that when contacting the nasal mucosa, it produces a compliant embrace rather than a mechanical extrusion, greatly reducing the risk of damage, even if it is an unconscious action. Realization: adopt medical-grade liquid silicone (LSR) one-piece molding.

[0043] 1.2 Geometry: Three-part configuration: umbrella-shaped soft head, middle sealing ring, and umbrella-shaped tail, forming a flexible nasal cavity fitting structure with gradually increasing diameter from the front end to the rear end. As shown in Figure 2

[0044] Umbrella-shaped soft head. Shape: arc-shaped or hemispherical leading head, like a soft "nose tip". Function: safe guidance, when entering the nasal cavity, it can naturally slide along the physiological curve of the turbinate, disperse the contact stress, and avoid causing scratches or discomfort to the nasal septum or the front end of the turbinate. Center opening at the end: this is the main channel for suction and atomization. Atomization micro-porous ring: a circle of multiple micro-lateral atomization micro-porous nozzles is arranged around the center opening of the umbrella-shaped soft head in the front area of the sealing ring. In "atomization mode", atomized gas can be sprayed from this ring, achieving circumferential humidification, rather than direct spraying from the end, making the humidification more uniform and gentle, and avoiding irritation to a single sensitive point.

[0045] Middle sealing ring. Position and shape: located behind the head, it is a slightly convex flexible ring with a circular cross-section. Core function: dynamic self-adaptive sealing, when the suction head enters the nasal cavity to a certain depth, about to the nasal threshold or slightly deeper, the ring will form contact with the cartilage and soft tissue parts of the inner wall of the nasal cavity; due to its softness, it can adapt to the subtle shape differences of different users and nostrils, forming a non-absolute rigid sealed space; this is the key structure to achieve efficient negative pressure suction and prevent leakage of atomized vapor.

[0046] Umbrella-shaped tail. Shape: from the sealing ring to the rear, a trumpet-shaped structure with gradually expanding diameter. Function: secondary sealing and stabilization, it works in coordination with the sealing ring to further ensure sealing, while providing slight support in the axial direction to prevent the suction head from being sucked too deep under negative pressure. The umbrella-shaped tail also facilitates removal from the nasal cavity.

[0047] Three-part coordinated workflow of the suction head: head guidance entry → sealing ring positioning and formation of the main sealing area → tail expansion for auxiliary stabilization. The entire suction head is like a miniature, flexible "piston" that establishes a controllable working chamber in the nasal cavity.

[0048] 1.3 Internal functional integration: hollow optical fiber sensor integration, from the vicinity of the end opening of the suction head, in the form of micro-windowing or transparent flexible material packaging, integrating an optical viscosity sensor (such as a miniature optical fiber reflection / scattering probe) for detecting the viscosity of secretions in the side wall. Its detection light path is directly aimed at the working area.

[0049] 2, Support body: navigation and signal transmission area, connecting the head and the main body, achieving positioning and signal transmission, using a controllable flexible navigation rod.

[0050] ​2.1 Material and hardness: Shore hardness 25-35; this hardness provides "flexible memory". It has enough support to maintain shape, transmit thrust and resist negative pressure collapse during suction than the suction head part, while it is more safe and cushioned than a completely rigid plastic tube. Users can slightly force it to bend to adapt to the nasal cavity, and it can maintain this curved shape after releasing the hand, which is convenient for single-handed operation at a fixed angle. Realization: it can be made of slightly higher hardness LSR or thermoplastic elastomer (TPE) coated with spiral spring or memory metal wire, ensuring that the hollow pipe will not be crushed under any bending.

[0051] 2.2 Internal channel and wiring: the main channel runs through the hollow pipe of the support body, which is a shared channel for atomized gas flow and negative pressure suction. The micro-cable channel reserves a micro-cave in the pipe wall for accommodating optical fibers or micro-wires connecting the sensor of the suction head to the main controller, realizing interference-free signal transmission.

[0052] 3. Connection part: power and signal interface area, integrated quick interface, realizes rigid and sealed connection with the main device, and the connection part is a reliable system interface.

[0053] The connection part is usually a standard interface made of hard plastic such as ABS, PC, and the interface is a Luer lock or bayonet type. Through rigid mechanical connection, it ensures firm connection with the main body and no air leakage. The connection part contains precise contacts inside, which can automatically complete the connection of sensor lines and identity recognition when the suction device is rotated into the main body. Embedded microchip (RFID or touch type) informs the main body of the suction device model, serial number or calibration parameters, ensuring system matching and safe use.

[0054] Mechanical connection and locking mechanism of the connection part: the main body side of the nasal aspirator is provided with a port cabin with a guide groove and internal threads or rotating buckle. The cabin has a dust cover. The end of the multi-modal suction device connection part is an ergonomic knob type joint with guide keys and threads or buckle lugs on the outside. The connection process includes: alignment and insertion, align the guide keys of the suction device connection part with the guide grooves of the main body port cabin, and insert directly to the bottom. At this time, the physical pipeline and electrical contacts have been preliminarily aligned. Rotate and lock, rotate the suction device connection part clockwise (about 60-90 degrees), the internal thread / buckle mechanism engages, generating uniform axial tension, pulling the suction device tightly to the main body. Locking feedback: when rotated in place, a clear "click" sound or a noticeable jerk can be heard, and the connection status indicator light on the main body (such as green) turns on, indicating that the mechanical locking is complete and the system is ready.

[0055] Fluid channel docking and sealing in the connection: inside the connection, a double-channel fluid interface is integrated. On the nose aspirator body side, there is a self-sealing valve (such as a silicone duckbill valve or a spring-loaded pin valve). When not connected to the suction device, the valve is closed, preventing contamination or liquid leakage inside the body. On the corresponding position of the suction device side, there is a hollow pin. When connected, the pin of the suction device will push open the self-sealing valve on the body side during insertion and locking, forming a leak-free continuous channel from the suction device head to the body's internal pump valve system. This channel is bidirectional and universal in both atomization and suction modes.

[0056] Electrical connection: This is the key to achieving "smart sensing" and uses a pluggable wear-free contact connection. On the nose aspirator body side: a set of gold-plated spring pins is arranged at the bottom of the port cabin as electrical contacts. These spring pins are connected to the control chip behind them. On the suction device side: a flat gold-plated copper contact disc is provided at the corresponding position at the end of the connection. When connected: after mechanical locking, the spring pins on the body side are compressed, forming a stable, low-resistance electrical connection with the contact disc on the suction device side. The design of the spring pins can tolerate slight alignment deviations and wear, with a long service life.

[0057] Connection contact: at least the following lines are included: power line (VCC): power supply for the micro sensor in the suction head (such as 3.3V low voltage). Ground line (GND). Sensor data line (SDA): transmits analog or digital signals of the optical viscosity sensor. Clock line (SCL) or chip select line: if the sensor uses digital protocols such as I2C or SPI. Identity recognition line (ID): connects the micro storage chip inside the suction device.

[0058] The multi-modal suction device of the present invention has bionic self-adaptation and deep safe contact: combining segmented flexible umbrella structure with precise Shore hardness gradient, it is specially designed for complex nasal passages. Instead of "hardly pushing in", it "softly slides in and fits". It fundamentally solves the problem of traditional hard suction heads that cannot penetrate deeply and easily cause pain or damage, making "deep cavity cleaning" possible and safe.

[0059] The multi-modal suction device of the present invention has dynamic flexible sealing technology: using the deformation ability of flexible materials, it realizes non-rigid sealing. Unlike traditional rubber gaskets, it can adaptively form an effective seal in different shaped nasal cavities, with uniform pressure distribution, and will not cause local ischemia or discomfort due to excessive compression. The present invention significantly improves the efficiency of negative pressure suction, preventing energy leakage; at the same time, it ensures that the drug or saline vapor can be retained in the target nasal cavity to the greatest extent in the atomization mode, improving the therapeutic effect.

[0060] The multi-modal suction device sensing and treatment function integrated terminal of the application: the optical viscosity sensor and the distributed atomization micro-pore are directly integrated in the disposable flexible suction head. The suction head is no longer a simple "pipe", but becomes an intelligent "sensing-execution terminal". In-situ, real-time diagnosis (secretion state) is realized, and in-situ, targeted treatment (atomization humidification) is triggered accordingly. This is a qualitative change from "blind operation" to "sensing feedback closed-loop control", and is the physical basis for realizing intelligent personalized nursing procedures.

[0061] The multi-modal suction device ergonomics and customizability of the application: the "bendable and shaped" characteristics of the support body allow the user or caregiver to pre-bend a most comfortable and easy-to-operate shape according to the patient's face and nostril angle. The operation convenience and comfort are greatly improved, especially for scenarios that require long-time operation or care for others. Combined with the identity recognition of the connecting part, different sizes and curvatures of the suction device can be developed in the future to adapt to different groups such as children and adults.

[0062] II. Suction nose device main body composition and components.

[0063] The suction nose device main body is provided with a suction mechanism, an atomization mechanism and a control mechanism; the suction mechanism includes a pressure flow rate sensor, a dirt tank and a connecting pipeline; the atomization mechanism includes an atomization liquid tank, an atomization electromagnetic valve, a piezoelectric atomization component and a connecting pipeline; the control mechanism includes a main electromagnetic valve, a micro air pump and a controller.

[0064] 1. Overall channel architecture: adopt independent parallel design structure of suction and atomization channels with intelligent valve switching, realize independent control and cooperation of air path, water path and suction path. Atomization channel (positive pressure): micro air pump → main electromagnetic valve → atomization liquid storage tank → atomization electromagnetic valve atomization cavity → nasal cavity. Suction channel (negative pressure): nasal cavity → dirt tank → main electromagnetic valve → micro air pump (reverse).

[0065] 2. Core component physical structure and connection method:

[0066] 2.1 Micro air pump module: dual-mode air pump, using brushless motor driven bidirectional diaphragm pump, supporting positive pressure (atomization mode) and negative pressure (suction mode) switching; air path connection, positive pressure outlet → atomization liquid tank pressure pipeline (with one-way valve); negative pressure inlet → dirt collection tank (with anti-backflow valve); control signal: pressure gradient control is realized through PWM speed regulation, 0-30kPa adjustable.

[0067] 2.2 Atomization liquid tank system: The atomization liquid tank adopts a layered design. The upper atomization liquid tank is made of medical-grade transparent PC material, with an internal liquid level sensor (capacitive). The lower pressurization tank is connected to the positive pressure output end of the air pump, and the pressure is transmitted to the liquid tank through a silica gel diaphragm or air bag. The liquid inlet of the atomization liquid tank has a self-sealing valve to prevent contamination. The liquid outlet is connected to the atomization chip cavity by a PTFE capillary tube (inner diameter 1 mm).

[0068] 2.3 Piezoelectric atomization chip assembly: The atomization cavity is independently set. The atomization cavity is provided with a diameter annular piezoelectric ceramic sheet with a resonant frequency of 1.7 MHz. The atomization cavity is also provided with a stainless steel microporous atomization plate with a pore size of 3-5 μm. The atomization cavity is also provided with a temperature sensor connected to the control mechanism to prevent overheating. The atomization cavity waterway connection: The inlet uses a tank capillary tube and is controlled by an electromagnetic valve, and the outlet uses a conical atomization nozzle with a 30° diffusion angle connected to the suction tool atomization channel.

[0069] 2.4 Pressure flow rate sensor: The system's tactile nerve.

[0070] An integrated pressure flow rate sensor chip using MEMS (Micro-Electro-Mechanical System) technology. This kind of chip is small in size, high in precision, and fast in response. The best position is on the negative pressure suction main channel, after the dirt collection tank and before the micro air pump; This position can most accurately measure the actual negative pressure value acting on the nasal cavity, while avoiding direct contamination and damage of the sensor chip by secretions droplets or atomization liquid.

[0071] The pressure flow rate sensor obtains absolute pressure value (unit: kPa or Pa) and / or flow value (unit: L / min). Analog output (such as 0.5-4.5V corresponding to a pressure range) or digital output (such as I2C protocol) is used to directly transmit to the controller ADC or interface.

[0072] The pressure flow rate sensor data is the core basis for the controller to make safety control and decision. Safety monitoring: Real-time pressure data is used to determine whether the system is working normally. High pressure (severe blockage) or low pressure (leakage) will trigger the controller alarm or stop. Closed-loop control feedback: As mentioned above, it is the feedback input of the PID control loop. The controller adjusts the air pump power according to its reading to determine whether the current negative pressure is too strong or too weak. Process determination: When the suction process is completed, the nasal secretions are removed, the air flow resistance will decrease, the sensor will detect an increase in flow and the pressure will stabilize at a lower negative pressure level. This change signal can be used by the controller to intelligently determine that the suction is complete and prompt the user or automatically stop.

[0073] 2.5 Optical viscosity sensor: The system's "pre-judgment eye".

[0074] Near-infrared light scattering method; low-power near-infrared LED as light source, phototransistor or photodiode as receiver. Integrated into the root or inner side wall of the disposable flexible suction head; form a small optical cavity. The emitter and receiver are arranged at a specific angle (such as 90° or 45°). When the suction head is empty, the light path is not disturbed. When there is secretion covering the optical window, the light will be scattered.

[0075] The optical viscosity sensor adopts a disposable design; the optical window is part of the suction head, and each time the suction head is replaced, the sensor contact part is replaced, preventing cross-infection and avoiding the influence of pollution on measurement accuracy.

[0076] The optical viscosity sensor obtains the intensity of scattered light. The viscosity of the secretion has a correlation with the intensity of scattered light, the higher the viscosity, the more macromolecular substances, the stronger the scattering is usually. The optical viscosity sensor outputs an analog voltage signal, the amplitude of which is proportional to the received light intensity. The signal is transmitted to the controller of the host for AD conversion and algorithm processing.

[0077] The optical viscosity sensor is the trigger and quantifier of the whole intelligent care program. The sensor continuously monitors when the device is on standby; when the detected signal value exceeds the preset threshold, it represents the presence and high viscosity, and it sends a signal to the controller; the controller triggers the "atomization mode" accordingly. This is a typical open-loop control logic of "IF sensor condition THEN start execution"; the AI algorithm of the controller can compare the signal strength with the pre-established model database to roughly judge the viscosity range (low, medium, high); according to different preset viscosity levels, the controller can decide different atomization time or atomization amount, for example, high viscosity secretion triggers longer atomization time, realizing preliminary "personalized" care.

[0078] 3. Pipeline system and valve control parameters: main gas pipeline system, set micro-pump atomization positive pressure mode 0.5-1.2bar; suction negative pressure mode-15-25kPa; pressure flow sensor real-time monitoring of nasal pressure, 50Hz sampling.

[0079] When the pressure flow sensor detects that the pressure value stabilizes within -15 kPa to -20 kPa, the standard deviation of fluctuation is ≤0.8 kPa, and lasts for 3 seconds, while the airflow speed is maintained at 1.0±0.3 L / min, it indicates that the secretion is completely removed and the pipeline is unobstructed, and the system determines that the suction is completed and the micro air pump is turned off. If the pressure continues to be lower than -25 kPa for more than 2 seconds (indicating blockage) or higher than -10 kPa for more than 1 second (indicating leakage), the safety protocol is triggered to stop immediately. Or use adaptive advanced PID control based on fuzzy logic and intelligent optimization algorithm: through real-time feedback of the pressure flow sensor, drive a fuzzy reasoning system trained by optimization algorithm to adjust PID parameters online and dynamically, so as to realize accurate, stable and personalized regulation of nasal pressure.

[0080] The liquid path system is provided with an atomization electromagnetic valve on the pipeline between the atomization liquid tank outlet and the piezoelectric atomization sheet inlet to control the atomization liquid flow, which is opened and closed in a pulse mode with an accuracy of ±0.01 mL. The atomization electromagnetic valve is provided as a high-precision switch of the liquid path, receives instructions from the controller, and works in a fast pulse opening and closing (i.e. intermittent opening and closing) mode. This pulse opening and closing mode can realize quantitative drug delivery and uniform atomization; by controlling the opening time and frequency of each pulse, the volume of liquid output each time can be accurately measured, thereby realizing programmed control of the total amount of atomization; the pulse opening and closing mode simulates the precise pulse regulation mechanism of hormone secretion in living organisms. The pulse opening and closing control mode is crucial for ensuring the uniformity of subsequent atomization and avoiding excessive liquid from flowing into the atomization chamber, which can cause performance degradation. The operation logic of the liquid path system is: after the controller decides to start the atomization program according to the optical viscosity sensor signal, it sends a series of precise timing pulse electrical signals to the atomization electromagnetic valve. The electromagnetic valve quickly acts accordingly, delivering the atomization liquid from the atomization liquid tank to the piezoelectric atomization sheet in the form of small and discrete "liquid groups". This design realizes fine management of the atomization process, ensuring the accuracy of the therapeutic dose and the effectiveness of the atomization effect.

[0081] An optical viscosity sensor is provided on the suction head for detection, such as an infrared scattering sensor, which detects the viscosity of the secretion in the range of 0-5000 cP, and the preset threshold of the secretion viscosity is set to 200-500 cP. An anti-reflux membrane is provided on the atomization micro-pore, which is made of nano-hydrophobic material with a contact angle >150°, to prevent the secretion from flowing back into the atomization channel.

[0082] 4. Dirt collection system: a two-stage separation structure is provided, the first stage uses cyclone separation to collect large particles by inertial impact, and the second stage uses a 0.2 μm hydrophobic filter membrane to prevent aerosol escape. A full-liquid detection is provided on the waste liquid tank to detect the volume of waste liquid, and an infrared photoelectric switch triggers a replacement reminder.

[0083] III. The method for controlling the use of the nasal aspirator with the multi-modal suction tool of the present application.

[0084] 1. Start-up phase: The optical viscosity sensor detects the state of the secretion, and detects that the viscosity of the secretion exceeds a preset threshold value. When the sensor detects that the viscosity of the secretion exceeds this range, the system automatically triggers the atomization mode. This threshold value is based on clinical observation and fluid property research. Secretion viscosity in this range generally indicates that the secretion is relatively viscous, and needs to be atomized and diluted to facilitate subsequent suction. Viscosity below 200 cP may not require atomization, while viscosity above 500 cP triggers high-intensity atomization. If the viscosity value is ≥ 200 cP, the controller opens the atomization electromagnetic valve, and the micro air pump is started in forward rotation. Atomization continues until a set amount, such as 15 mL, is reached.

[0085] 2. Mode switching phase: If the liquid level sensor detects that the atomization liquid is depleted, the atomization electromagnetic valve and the main electromagnetic valve, and the micro air pump are closed.

[0086] 3. Nasal suction phase: The controller opens the main electromagnetic valve, switches to negative pressure, starts the micro air pump in reverse rotation, and gradually increases the negative pressure from -5 kPa to a maximum of -20 kPa.

[0087] 4. Safety protection mechanism: The pressure flow rate sensor provides real-time feedback, which can communicate with the PID algorithm to dynamically adjust the air pump speed. In emergency situations, such as blockage, three pulse-type backflushes (alternating positive and negative pressure) can be triggered.

[0088] The present application realizes the high integration of "hard connection" (mechanical and fluid) and "soft connection" (electrical and signal) between the multi-modal suction tool and the main body of the nasal aspirator through the integrated quick connector. Based on the two-way intelligent signal flow of this physical connection, the biological information perception of the front-end suction head can drive the complex action execution of the rear-end main body in real time, forming a complete "perception-analysis-decision-execution" closed loop. This is not only a simple physical connection, but also the "spinal cord" of the entire intelligent nursing system, and is the engineering technical cornerstone for safe and accurate implementation of highly automated and personalized nasal care.

Claims

1. A nasal care aspirator, comprising a nasal aspirator body and a multimodal aspirator; the nasal aspirator body provides drive and control for the multimodal aspirator's nasal suction and atomization, and is connected to the multimodal aspirator via a detachable interface; characterized in that: The multimodal suction device has a nasal cavity-adaptive shape and consists of a suction head, a support body, and a connecting part, forming a hollow tube structure. The suction head has a flexible umbrella-shaped nasal cavity-adaptive structure, and the rear end of the suction head is connected to a flexible rod-shaped support body. The end of the support body is a connecting part that is rigidly connected to the main body of the nasal aspirator. The suction head has a central opening at its end, and an independent suction channel is provided at the rear end of the central opening and connected to the main body of the nasal aspirator. Multiple atomizing micro-holes are provided around the central opening at an angle greater than 30 degrees to the axis of the central opening. The atomizing micro-holes are provided with independent atomizing channels and connected to the main body of the nasal aspirator.

2. The nasal care suction device according to claim 1, characterized in that: The suction head is made of flexible material; it consists of an umbrella-shaped soft head, a central sealing ring, and an umbrella-shaped tail, forming an overall flexible nasal cavity adaptation structure with a gradually increasing diameter from the front end to the rear end; the suction head has a Shore hardness of 10 to 20.

3. The nasal care suction device according to claim 2, characterized in that: The umbrella-shaped soft head has an arc-shaped or hemispherical structure and a smooth or velvety surface; the umbrella-shaped soft head is equipped with an optical viscosity sensor and is connected to the main control mechanism of the nasal aspirator.

4. The nasal care suction device according to claim 2, characterized in that: The sealing ring and umbrella-shaped tail are adapted to the nasal threshold to form a flexible sealing structure.

5. The nasal care suction device according to claim 2, characterized in that: The support is a flexible, bendable rod-shaped navigation rod with a Shore hardness of 25 to 35.

6. The nasal care suction device according to claim 3, characterized in that: The connecting part is securely connected to the nasal aspirator body by snap-fit ​​or screwing, and integrates pipes and electrical contacts or connecting cables to realize the connection of sensor signal transmission and atomization and suction channels.

7. The nasal care suction device according to claim 3, characterized in that: A pressure flow rate sensor is installed in the suction channel of the multimodal suction device and connected to the main control mechanism of the nasal aspirator.

Images