Hair growing instrument and liquid guide control method thereof

Abstract

The invention relates to the field of beauty care equipment, and provides a hair growth instrument and a liquid guide control method thereof. The method is applied to a hair growing instrument and comprises the steps that a control module mainboard samples and detects the pressure in a liquid storage tank; determining corresponding target traffic according to the selected mode type; wherein the mode types comprise a refreshing mode and a nourishing mode, the refreshing mode corresponds to a first flow threshold value, the nourishing mode corresponds to a second flow threshold value, and the first flow threshold value is smaller than the second flow threshold value; the control module mainboard adjusts the pulse width modulation duty ratio of the micro air pump according to the target flow so as to achieve accurate control over the flow, and the micro air pump is controlled to pressurize the liquid storage tank so that liquid can flow out of the liquid guide tooth-shaped protrusions; and the control module mainboard starts the micro air pump to perform reverse pressurization so as to remove residual liquid in the liquid outlet micropores.

Description

Technical Field

[0001] This application relates to the field of beauty care equipment technology, and in particular to a hair growth instrument and its fluid control method. Background Technology

[0002] In existing technologies, consumer-grade hair regrowth devices have significant deficiencies in their light and fluid guiding functions: 1. Insufficient light guiding function: Most products use LED light beads for phototherapy. Due to low power and severe light scattering, the light energy is difficult to penetrate the scalp and reach the dermis, resulting in limited hair growth effect. A few products that use vertical cavity surface-emitting lasers (VCSELs), such as ASHMORE SF-03, still emit light through the panel. There is loss in the light transmission path, and the utilization rate is not ideal.

[0003] 2. Defects in the fluid guiding function: Existing hair growth instruments that combine light guiding and fluid guiding functions have small areas of toothed protrusions for light guiding and mostly use LED light sources, resulting in weak phototherapy effects; the fluid guiding system generally suffers from unstable flow and easy blockage. For example, it relies on gravity or a simple pump to drive the system, making it impossible to accurately control the fluid flow. In addition, the design of the fluid outlet structure is unreasonable (such as straight cylindrical micropores), which can easily lead to blockage due to fluid residue or impurities.

[0004] 3. Unreasonable structural layout: Traditional products do not take into account both function and feel. The liquid guiding components (such as the liquid tank) are scattered, resulting in a shift in the center of gravity and a poor user grip experience. The number and ratio of light guiding and liquid guiding tooth-shaped protrusions are unbalanced, failing to highlight the core phototherapy function.

[0005] Therefore, a method is urgently needed to solve at least one of the above problems. Summary of the Invention

[0006] This application provides a hair growth instrument and its fluid guiding control method, aiming to solve the problems of insufficient light guiding function, defective fluid guiding function, and unreasonable structural layout of existing consumer-grade hair growth instruments.

[0007] In a first aspect, embodiments of this application provide a liquid guiding control method for a hair growth instrument, applied to a hair growth instrument comprising a comb body, light-guiding tooth-shaped protrusions disposed on the comb body, and a micro-current conductive structure. The light-guiding tooth-shaped protrusions are provided with light-guiding holes, through which laser light from a vertical cavity surface-emitting laser is emitted. The light-guiding tooth-shaped protrusions are made of a material combining silicone and metal, with the portion in contact with the scalp being made of metal to generate a micro-current. A micro air pump is connected to a module main board, and the module main board is connected to a button board and a battery in the main body via spring pin terminals to power the micro air pump. The micro air pump is connected to a liquid storage tank. The method includes: The control module motherboard samples and detects the pressure inside the liquid storage tank; The target traffic is determined based on the selected mode type; the mode type includes refreshing mode and nourishing mode, the refreshing mode corresponds to a first traffic threshold, the nourishing mode corresponds to a second traffic threshold, and the first traffic threshold is less than the second traffic threshold. The control module motherboard adjusts the pulse width modulation duty cycle of the micro air pump according to the target flow rate to achieve precise flow control. It controls the micro air pump to pressurize the liquid storage tank so that the liquid flows out from the guide tooth protrusion. The control module motherboard starts the micro air pump to pressurize in reverse to remove residual liquid in the liquid outlet microhole.

[0008] In some embodiments, the control module motherboard samples and detects the pressure inside the liquid storage tank, including: acquiring the pressure sensor signal inside the liquid storage tank in real time through the analog-to-digital conversion module on the module motherboard to obtain the pressure inside the liquid storage tank.

[0009] In some embodiments, determining the target flow rate based on the selected mode type includes: if the user selects the refreshing mode, setting the target flow rate to 0.1 to 0.3 ml per minute; if the user selects the nourishing mode, setting the target flow rate to 0.5 to 0.8 ml per minute.

[0010] In some embodiments, the control module motherboard adjusts the pulse width modulation duty cycle of the micro air pump according to the target flow rate, including: establishing a mapping table between the target flow rate and the pulse width modulation duty cycle, retrieving the corresponding duty cycle parameter from the mapping table according to the target flow rate and sending it to the micro air pump.

[0011] In some embodiments, controlling the micro air pump to pressurize the liquid storage tank to cause the liquid to flow out from the guide tooth-shaped protrusion includes: the micro air pump operating with a set pulse width modulation duty cycle, applying a pressure of 0.1-0.3 MPa to the liquid storage tank through the silicone hose, causing the liquid to flow out through the liquid outlet micropores of the guide tooth-shaped protrusion.

[0012] In some embodiments, the control module motherboard activates a micro air pump to reverse pressurize and remove residual liquid from the liquid outlet micropores, including: controlling the module motherboard to periodically trigger the micro air pump to run in reverse, thereby generating an instantaneous reverse airflow in the liquid storage tank through reverse pressurization, and flushing the liquid outlet micropores of the guide tooth-shaped protrusions.

[0013] In some embodiments, the method further includes: controlling the module motherboard to acquire scalp images through the camera on the comb body, analyzing the scalp hair follicle status using an image recognition algorithm, automatically recommending a refreshing mode or a nourishing mode based on the analysis results, and adjusting the pulse width modulation duty cycle of the micro air pump.

[0014] In some embodiments, the method further includes: controlling the main board of the module to monitor the liquid level in the storage tank in real time; when the level is detected to be lower than a preset threshold, issuing a liquid replenishment prompt through the indicator light on the comb body, and automatically reducing the pulse width modulation duty cycle of the micro air pump to reduce the flow rate.

[0015] In some embodiments, the method further includes: controlling the module motherboard to generate a personalized fluid delivery plan based on the input usage duration and frequency data using a preset intelligent algorithm, and dynamically adjusting the working cycle and pulse width modulation duty cycle of the micro air pump to adapt to the scalp care needs of different users.

[0016] Secondly, this application provides a hair growth device, which includes a comb body, light-guiding tooth-shaped protrusions disposed on the comb body, and a micro-current conductive structure. The light-guiding tooth-shaped protrusions are provided with light-guiding holes, and laser light from a vertical cavity surface-emitting laser is emitted from the light-guiding holes. The light-guiding tooth-shaped protrusions are made of a material combining silicone and metal, and the part in contact with the scalp is made of metal to generate a micro-current. A micro air pump is connected to a module main board, and the module main board is connected to a button board and a battery in the main body through spring pin terminals to power the micro air pump. The micro air pump is connected to a liquid storage tank. It also includes a processor, which is used to implement the method provided in any embodiment of this application.

[0017] This application controls the VCSEL laser to emit light directly through a toothed, raised light guide, reducing transmission loss. The vertical cavity surface emission characteristic reduces scattering, allowing more light energy to reach the dermis layer of the scalp, significantly enhancing hair follicle activation. The toothed light guide is made of a combination of silicone and metal; the metal part in contact with the scalp provides microcurrent stimulation (EMS), while the silicone part enhances contact comfort, avoiding the discomfort of an all-metal material. The module's mainboard samples the reservoir pressure in real time and adjusts the air pump power using pulse width modulation technology, achieving precise flow control for both refreshing and nourishing modes to suit different care needs.

[0018] The inverted conical micro-orifice with serrated protrusions (1mm inlet diameter, 0.5mm outlet) reduces impurity retention. Combined with a periodic reverse pressure backflushing function, it effectively removes residual liquid from the micro-orifice, preventing clogging. The layout of light-guiding serrated protrusions distributed on the periphery and liquid-guiding serrated protrusions concentrated on the inner ring keeps the liquid reservoir close to the center, balancing the comb's weight and improving grip. The spring-loaded pogopin electrical connection enhances waterproofing and stability.

[0019] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic flowchart illustrating the steps of a liquid guiding control method for a hair growth instrument according to an embodiment of this application; Figure 2 This is a schematic diagram of the structure of a hair growth instrument provided in one embodiment of this application; Figure 3 This is an exploded schematic diagram of a hair growth device provided in one embodiment of this application; Figure 4 This is a schematic block diagram of the liquid guiding control device of a hair growth instrument provided in one embodiment of this application; Figure 5 This is a schematic block diagram of the structure of a hair growth instrument provided in one embodiment of this application.

[0022] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] The flowchart shown in the attached diagram is for illustrative purposes only and does not necessarily include all content and operations / steps, nor does it necessarily have to be performed in the order described. For example, some operations / steps can be broken down, combined, or partially merged, so the actual execution order may change depending on the actual situation.

[0025] It should be understood that, in order to clearly describe the technical solutions of the embodiments of the present invention, the terms "first" and "second" are used in the embodiments of the present invention to distinguish identical or similar items with essentially the same function and effect. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, and the terms "first" and "second" are not necessarily different.

[0026] It should be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0027] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0028] In existing technologies, consumer-grade hair regrowth devices have significant deficiencies in their light and fluid guiding functions: 1. Insufficient light guiding function: Most products use LED light beads for phototherapy. Due to low power and severe light scattering, the light energy is difficult to penetrate the scalp and reach the dermis, resulting in limited hair growth effect. A few products that use vertical cavity surface-emitting lasers (VCSELs), such as ASHMORE SF-03, still emit light through the panel. There is loss in the light transmission path, and the utilization rate is not ideal.

[0029] 2. Defects in the fluid guiding function: Existing hair growth instruments that combine light guiding and fluid guiding functions have small areas of toothed protrusions for light guiding and mostly use LED light sources, resulting in weak phototherapy effects; the fluid guiding system generally suffers from unstable flow and easy blockage. For example, it relies on gravity or a simple pump to drive the system, making it impossible to accurately control the fluid flow. In addition, the design of the fluid outlet structure is unreasonable (such as straight cylindrical micropores), which can easily lead to blockage due to fluid residue or impurities.

[0030] 3. Unreasonable structural layout: Traditional products do not take into account both function and feel. The liquid guiding components (such as the liquid tank) are scattered, resulting in a shift in the center of gravity and a poor user grip experience. The number and ratio of light guiding and liquid guiding tooth-shaped protrusions are unbalanced, failing to highlight the core phototherapy function.

[0031] Therefore, a method is urgently needed to solve at least one of the above problems.

[0032] To solve the above problem, please refer to Figure 1 This application provides a method for controlling the flow of fluid in a hair growth device, applicable to, for example... Figures 2 to 3 The hair growth device shown includes a comb body, light-guiding tooth-shaped protrusions on the comb body, and a micro-current conductive structure. The light-guiding tooth-shaped protrusions have light-guiding holes, from which laser light from a vertical cavity surface-emitting laser is emitted. The light-guiding tooth-shaped protrusions are made of a combination of silicone and metal, with the part in contact with the scalp being made of metal to generate a micro-current. A micro air pump is connected to a module main board, which is connected to a button board and battery in the main body via spring pin terminals to power the micro air pump. The micro air pump is connected to a liquid storage tank.

[0033] In some embodiments, such as Figure 1 and 2 As shown, the provided VCSEL laser-based toothed protrusion light-emitting hair-generating instrument includes a conductive toothed protrusion 1, a decorative piece on the upper shell of the module 2, an upper shell of the module 3, a camera 4, a main board of the module 5, a lower shell of the module 6, a lower shell of the liquid storage tank 7, a sealing ring for the liquid storage tank 8, a sealing sleeve 9, a miniature air pump 10, a lower shell of the main body 11, a liquid-guiding toothed protrusion 12, an upper shell of the liquid storage tank 13, a silicone sleeve 14, a magnet 15, a pogopin terminal female socket 16, a keypad 17, a button 18, an indicator light 19, an upper shell of the main body 20, a function button 21, an OK button 22, a battery 23, a type-C electrical board 24, a decorative piece on the upper shell of the main body 25, a tail cover of the main body 26, and a VCSEL chip 27.

[0034] It should also be noted that each piece of information involved in the method provided in this application was extracted with the authorization of the relevant user and in accordance with relevant regulations, and will not infringe on user privacy.

[0035] The provided hair regrowth instrument's fluid control method includes steps S101 to S103. Details are as follows: Step S101. The control module motherboard samples and detects the pressure inside the liquid storage tank.

[0036] Specifically, by monitoring the pressure value in the liquid storage tank in real time, a data basis is provided for subsequent adjustment of the air pump power, ensuring that the liquid output pressure is stable within a reasonable range (0.1-0.3 MPa), and avoiding leakage caused by unstable flow due to insufficient pressure or excessive pressure.

[0037] A pressure sensor (such as a piezoresistive sensor) is integrated into the inner wall of the liquid storage tank or on the silicone hose between the micro air pump and the liquid storage tank to sense the internal air pressure in real time; an analog-to-digital converter (ADC) module is set on the main board of the module to convert the analog signal output by the pressure sensor into a digital signal (such as a 0-5V voltage signal corresponding to a 0-3 MPa pressure value).

[0038] The module motherboard periodically collects pressure data at a preset frequency (e.g., 100ms / time) and removes signal noise through filtering algorithms (e.g., moving average filtering). The pressure value is displayed in real time on the comb body display screen or synchronized to the user terminal APP via Bluetooth for user monitoring.

[0039] Step S102. Determine the corresponding target traffic based on the selected mode type; wherein the mode type includes refreshing mode and nourishing mode, the refreshing mode corresponds to a first traffic threshold, the nourishing mode corresponds to a second traffic threshold, and the first traffic threshold is less than the second traffic threshold.

[0040] Specifically, by preset refreshing mode (low flow) and nourishing mode (high flow), users can actively select or the system can intelligently recommend to match different scalp care needs (such as daily cleaning or deep nourishment), avoiding the "one-size-fits-all" flow control method of traditional products.

[0041] Users input mode commands through function buttons on the comb body (such as independent buttons for "Refreshing Mode" and "Nourishing Mode" or a combination of "OK" buttons); the main board of the module detects changes in button level through the button board circuit and identifies the selected mode (such as a low level signal for Refreshing Mode and a high level signal for Nourishing Mode).

[0042] Flow threshold settings: Refreshing mode: target flow rate is set to 0.1 ml / min, suitable for scalp oil cleansing or delivery of light nutrient solution; Nourishing mode: target flow rate is set to 0.5 ml / min, suitable for intensive care with high concentration of serum or essential oil; threshold parameters are stored in the EEPROM memory of the module motherboard and can be adjusted by factory preset or user customization.

[0043] Step S103. The control module motherboard adjusts the pulse width modulation duty cycle of the micro air pump according to the target flow rate to achieve precise flow control. The micro air pump pressurizes the liquid storage tank so that the liquid flows out from the guide tooth protrusion. The control module motherboard starts the micro air pump to pressurize in reverse to remove residual liquid in the liquid outlet microhole.

[0044] Specifically, the output power of the micro air pump is dynamically adjusted by pulse width modulation (PWM) technology to establish a mapping relationship between the target flow rate and the PWM duty cycle, thereby achieving linear flow control. At the same time, instantaneous airflow is generated by periodically applying reverse pressure to flush the liquid outlet micropores of the liquid guide tooth protrusions, thus solving the problem of blockage caused by liquid residue.

[0045] The mapping relationship is established by generating a target flow rate-PWM duty cycle reference table through experimental testing. For example, the refreshing mode (0.1 ml / min) corresponds to a PWM duty cycle of 20%; the nourishing mode (0.5 ml / min) corresponds to a PWM duty cycle of 80%. The module motherboard retrieves the corresponding duty cycle parameters from the reference table according to the target flow rate determined in step S102, and sends them to the micro air pump through the PWM drive circuit. The micro air pump operates at the set duty cycle (e.g., a 20% duty cycle means that the motor works for 200 ms and stops for 800 ms per second), and applies a stable pressure to the liquid storage tank through the silicone hose (e.g., 0.1 MPa corresponds to a low flow rate, and 0.3 MPa corresponds to a high flow rate), driving the liquid to flow out through the inverted conical liquid outlet micro-hole (inlet diameter 1 mm, outlet 0.5 mm) with the guide tooth-shaped protrusion.

[0046] The reverse pressurization anti-clogging mechanism uses a built-in timer on the mainboard (e.g., every 5 minutes of use or before each shutdown) to trigger the micro air pump to run in reverse (changing the motor rotation or airflow direction). During reverse operation, the air pump generates a momentary negative pressure or reverse airflow (e.g., lasting 500ms) in the liquid storage tank, drawing residual liquid in the liquid outlet micro-hole back into the storage tank or flushing away impurities. Combined with the inverted conical micro-hole structure, this further reduces the probability of clogging and extends the service life of the liquid guiding system.

[0047] In some embodiments, the control module motherboard samples and detects the pressure inside the liquid storage tank, including: acquiring the pressure sensor signal inside the liquid storage tank in real time through the analog-to-digital conversion module on the module motherboard to obtain the pressure inside the liquid storage tank.

[0048] Real-time pressure acquisition of the storage tank is achieved through the analog-to-digital converter module on the mainboard. A piezoresistive pressure sensor is integrated into the inner wall of the storage tank or on the silicone hose between the air pump and the storage tank, outputting an analog voltage signal (e.g., 0-5V corresponding to 0-0.5 MPa pressure). The mainboard has a built-in 12-bit ADC module to convert the analog signal into a digital value (e.g., 0x0000-0xFFFF corresponding to 0-5V). The mainboard acquires pressure data at 100ms intervals, and a moving average filtering algorithm is used to remove high-frequency noise, ensuring that the pressure fluctuation error is ≤ ±0.01 MPa.

[0049] Real-time pressure monitoring provides a basis for subsequent air pump power adjustment, avoiding problems such as pressure drop and unstable flow caused by reduced liquid in the storage tank (existing technologies rely on gravity or fixed pump bodies, which cannot dynamically compensate for pressure changes).

[0050] In some embodiments, determining the target flow rate based on the selected mode type includes: if the user selects the refreshing mode, setting the target flow rate to 0.1 to 0.3 ml per minute; if the user selects the nourishing mode, setting the target flow rate to 0.5 to 0.8 ml per minute.

[0051] Set differentiated traffic thresholds based on the user's selected mode (refreshing / nourishing).

[0052] The comb body has independent buttons (e.g., the "Refreshing Mode" button corresponds to the LOW level of the GPIO pin, and the "Nourishing Mode" button corresponds to the HIGH level). Users can switch modes by pressing a short button, and the motherboard recognizes the input signal through the button scanning circuit.

[0053] Refreshing Mode: Target flow rate range 0.1-0.3 ml / min, suitable for low-viscosity nutrient solutions (such as oil-control solutions containing salicylic acid), corresponding to a reservoir pressure of 0.1-0.2 MPa; Nourishing Mode: Target flow rate range 0.5-0.8 ml / min, suitable for high-viscosity serums (such as hair growth solutions containing minoxidil), corresponding to a pressure of 0.2-0.3 MPa; Threshold parameters are stored in the motherboard EEPROM and support factory calibration (current technology has a fixed flow rate and cannot adapt to different care needs). In some embodiments, the control module motherboard adjusts the pulse width modulation duty cycle of the micro air pump according to the target flow rate, including: establishing a mapping table between the target flow rate and the pulse width modulation duty cycle, retrieving the corresponding duty cycle parameter from the mapping table according to the target flow rate and sending it to the micro air pump.

[0054] By establishing a mapping table of "target flow rate - PWM duty cycle", the power of the air pump can be dynamically adjusted.

[0055] The mapping table is created by testing the actual flow rate under different duty cycles using orthogonal experiments, generating a two-dimensional comparison table (example shown below): The motherboard queries the mapping table to obtain the corresponding duty cycle based on the target flow rate determined in step S102, and outputs a square wave signal through the PWM driver chip (such as TC4427) to control the speed of the air pump motor, thereby achieving linear flow rate adjustment (the prior art uses a fixed power pump body, and the flow rate error is > ±20%, while the error in this embodiment is ≤ ±5%).

[0056] In some embodiments, controlling the micro air pump to pressurize the liquid storage tank to cause the liquid to flow out from the guide tooth-shaped protrusion includes: the micro air pump operating with a set pulse width modulation duty cycle, applying a pressure of 0.1-0.3 MPa to the liquid storage tank through the silicone hose, causing the liquid to flow out through the liquid outlet micropores of the guide tooth-shaped protrusion.

[0057] The air pump applies precise pressure to the liquid storage tank through a silicone hose, driving the liquid to flow out through the inverted conical micro-holes.

[0058] The miniature air pump (such as a diaphragm pump) operates with the PWM duty cycle of Example 3, delivering compressed air to the reservoir through a silicone hose at a pressure range of 0.1-0.3 MPa (adjusted via closed-loop feedback from a pressure sensor).

[0059] Liquid flows from the storage tank through a silicone hose into a stepped liquid guiding channel (with an inner diameter gradually decreasing from 2 mm to 1 mm) inside the toothed protrusion, and finally sprays out through an inverted conical liquid outlet micro-hole (inlet diameter 1 mm, outlet 0.5 mm). The flow rate is increased by utilizing the orifice contraction effect, and liquid residue is reduced (existing technologies mostly use straight cylindrical micro-holes, with a residue rate >30%, while the residue rate in this embodiment is <5%).

[0060] In some embodiments, the control module motherboard activates a micro air pump to reverse pressurize and remove residual liquid from the liquid outlet micropores, including: controlling the module motherboard to periodically trigger the micro air pump to run in reverse, thereby generating an instantaneous reverse airflow in the liquid storage tank through reverse pressurization, and flushing the liquid outlet micropores of the guide tooth-shaped protrusions.

[0061] Triggering conditions: Timed trigger: After each 5-minute cleaning cycle, the motherboard timer triggers the reverse program; Manual trigger: The user presses and holds the "Cleaning Button" for 3 seconds to force the reverse run; Reverse operation mechanism: The air pump motor reverses (e.g., by switching polarity via an H-bridge circuit) to generate a momentary negative pressure of -0.05 MPa in the liquid storage tank, lasting for 500 ms. The negative pressure airflow carries the residual liquid in the micropores back to the liquid storage tank, while simultaneously flushing away impurities on the pore walls (such as dandruff and nutrient solution crystals). This, combined with the inverted conical structure, achieves "self-cleaning" (existing technologies lack a backflushing mechanism, resulting in a blockage rate >25%, while this embodiment has a blockage rate <3%).

[0062] In some embodiments, the method further includes: controlling the module motherboard to acquire scalp images through the camera on the comb body, analyzing the scalp hair follicle status using an image recognition algorithm, automatically recommending a refreshing mode or a nourishing mode based on the analysis results, and adjusting the pulse width modulation duty cycle of the micro air pump.

[0063] A miniature camera (5 megapixels resolution, with LED fill light) is set at the top of the comb body, and the shooting distance is 1-2cm to collect real-time images of hair follicles on the scalp; The motherboard has a built-in convolutional neural network (CNN) model (such as MobileNetv3). The offline training data includes multiple images of different hair follicle states, which can identify indicators such as hair follicle density and sebum secretion level. If sparse hair follicles and excessive sebum secretion are detected, the refreshing mode (0.2ml / min flow rate) is automatically recommended. If hair follicle atrophy and dry scalp are detected, the nourishing mode (0.6ml / min flow rate) is recommended, and the VCSEL laser power is adjusted simultaneously (current technology relies on manual mode selection and lacks personalized adaptation).

[0064] In some embodiments, the method further includes: controlling the main board of the module to monitor the liquid level in the storage tank in real time; when the level is detected to be lower than a preset threshold, issuing a liquid replenishment prompt through the indicator light on the comb body, and automatically reducing the pulse width modulation duty cycle of the micro air pump to reduce the flow rate.

[0065] Liquid levels can be inferred by changes in pressure sensor data (e.g., 0.05 MPa for an empty tank and 0.3 MPa for a full tank), or an infrared level sensor can be installed on the side wall of the storage tank to detect the liquid level. When the liquid level is below a preset threshold (e.g., 20ml), the mainboard controls the comb body LED indicator to flash red and sends a Bluetooth notification to the mobile APP; at the same time, the PWM duty cycle is reduced to 10% and the flow rate is limited to 0.05ml / min to prevent the air pump from running dry (existing technology does not monitor the liquid level, which can easily lead to dry burning and damage to the equipment after the liquid is exhausted).

[0066] In some embodiments, the method further includes: controlling the module motherboard to generate a personalized fluid delivery plan based on the input usage duration and frequency data using a preset intelligent algorithm, and dynamically adjusting the working cycle and pulse width modulation duty cycle of the micro air pump to adapt to the scalp care needs of different users.

[0067] The motherboard records the comb's usage time and movement trajectory using a gyroscope and accelerometer, and combines this with button operation logs (such as mode switching frequency) to generate user habit data (such as using it 3 times a week for 10 minutes each time, and preferring the nourishing mode). Using time-series prediction algorithms (such as LSTM) or rule engines, the correlation between historical data and hair follicle improvement effects is analyzed, and the working cycle of the air pump is dynamically adjusted (e.g., after two weeks of continuous use, the flow rate of the nourishing mode is automatically increased from 0.5ml / min to 0.6ml / min to avoid scalp adaptation). Users can view personalized plan reports through the APP and manually fine-tune parameters (existing technology has fixed functions and cannot adapt to individual differences).

[0068] In some embodiments, to address the light transmission loss problem caused by light emission from existing VCSEL panels (the light utilization rate of existing technology is ≤60%), a microlens array is set between the VCSEL chip and the light-guiding tooth-shaped protrusion to optimize laser coupling efficiency, reduce diffuse reflection loss, and enhance the light therapy penetration effect.

[0069] A microlens array (each lens has a diameter of 0.5 mm, a focal length of 1 mm, and is made of high-transmittance quartz (transmittance ≥ 98%)) is fabricated using a precision photolithography process on the light-emitting surface of a VCSEL chip (each chip contains 16 5mW VCSEL units). The microlenses are mounted on the metal bracket using low-temperature epoxy adhesive (curing temperature ≤80℃ to avoid damaging the VCSEL chip), ensuring that each lens is aligned with the light emission center of the VCSEL unit (deviation ≤0.1mm). The light-guiding tooth-shaped protrusion has a high-refractive-index light-guiding channel (made of PMMA material with a refractive index of 1.49) inside, and the inner wall of the channel is ultra-polished (roughness Ra≤0.1μm) to reduce diffuse reflection loss of light during transmission.

[0070] The laser emitted by the VCSEL (wavelength 650nm, divergence angle 10°) is focused by a microlens, compressing the divergence angle to ≤5°, and is then guided into the light guide channel as collimated light. The light guide channel transmits the laser to the tip of the tooth-shaped protrusion, which is then atomized (roughness Ra=0.5μm), allowing the light to uniformly cover the scalp with a 30° diffusion angle (coverage area increased by 40% compared to existing technologies). Through integrating sphere testing, the light transmission efficiency has been increased from 60% in existing technologies to over 85%, and the depth of laser penetration into the dermal layer of the scalp has increased from 2mm to 3mm (simulated using a pigskin model), effectively stimulating the activity of hair follicle stem cells.

[0071] In some embodiments, to address the issue of center of gravity shift caused by the dispersed location of the liquid reservoir in traditional products (such as being placed at the tail of the comb body) (resulting in the front end dropping and causing fatigue when holding the product), an integrated liquid reservoir and light guide module are designed. The liquid reservoir is integrated into the lower shell of the module, close to the center of the comb body, to achieve a balanced center of gravity and improve the grip experience.

[0072] The lower shell of the module is made of ABS+PC composite material (high strength and light weight), with a reserved space of 100ml for the liquid storage tank (located below the VCSEL chip group and the metal bracket, within 5mm on both sides of the comb's central axis); the liquid storage tank is made of transparent PC material (2mm thick) with a scratch-resistant surface treatment (hardness ≥3H), allowing users to directly observe the liquid level (more intuitive when used in conjunction with the liquid level monitoring in Example 7); the liquid storage tank is connected to the micro air pump via a short silicone hose (length ≤10cm, inner diameter 3mm) to reduce losses during pressure transmission (pressure attenuation ≤5%).

[0073] The weight distribution of the comb body was simulated using 3D modeling software (such as SolidWorks). The liquid tank accounts for 30% of the total weight of the module (total module weight ≤ 150g), the VCSEL chipset (including metal bracket) accounts for 40%, and other components (motherboard, battery) account for 30%. In some embodiments, to address the problem of an imbalance in the ratio of light-guiding to fluid-guiding toothed protrusions in traditional products (such as an excessively high proportion of fluid-guiding toothed protrusions, which weakens the core function of phototherapy), an integrated toothed protrusion is designed (each toothed protrusion simultaneously has the functions of light guiding, fluid guiding, and microcurrent), ensuring the coverage area of ​​phototherapy while achieving precise fluid guiding.

[0074] The tooth-shaped protrusions are made of a composite material of "silicone + metal" (the outer layer is soft silicone, and the tip that contacts the scalp is metal (304 stainless steel)). The metal part serves as a microcurrent electrode (connecting to the constant current source circuit of the module's main board). The toothed protrusion has two independent channels inside: a light guide channel with a diameter of 1mm, using a PMMA light guide rod, which connects to the light-emitting surface of the VCSEL chip (focused by a microlens); and a liquid guide channel with a diameter of 0.8mm, using silicone material, which connects to the silicone tubing of the liquid storage tank (the outlet is an inverted conical micropore).

[0075] The comb body has a total of 20 integrated tooth-shaped protrusions, of which 14 are the main working tooth-shaped protrusions (simultaneously activating phototherapy, fluid conduction, and microcurrent), and 6 are backup tooth-shaped protrusions (automatically activated by the switching circuit of the module motherboard when the main tooth-shaped protrusions are blocked); the phototherapy coverage area is ≥90% (tested by a scalp model), and the fluid conduction flow rate can be adjusted according to the mode (0.2ml / min / tooth-shaped protrusion in refreshing mode, 0.6ml / min / tooth-shaped protrusion in nourishing mode), solving the problem of "insufficient phototherapy coverage" in traditional products.

[0076] In some embodiments, to address the issue that the microcurrent, phototherapy, and fluid delivery functions of existing products are independent (without synergy), the microcurrent is used to detect the scalp condition (such as oil secretion and humidity), and the VCSEL light power and fluid delivery flow rate are adjusted in conjunction to achieve synergistic optimization of the three functions and improve the care effect.

[0077] The light-guiding tooth-shaped protrusion on the metal tip serves as the positive electrode for the microcurrent, while the comb handle (made of metal) serves as the negative electrode. The main board of the module detects the scalp resistance (range 10kΩ-100kΩ) through a constant current source circuit (outputting a safe current of 100μA-500μA). The correspondence between resistance value and scalp condition is as follows: resistance ≤30kΩ: excessive sebum secretion (oily scalp); 30kΩ < resistance <70kΩ: normal condition; resistance ≥70kΩ: dry scalp (insufficient moisture).

[0078] When a resistance ≤30kΩ (oily): The mainboard switches to refreshing mode, and the fluid flow rate is adjusted to 0.3ml / min; the VCSEL power is increased to 8mW (30% more than normal mode) to enhance laser penetration depth (decomposes oil and promotes metabolism); the microcurrent intensity is increased to 500μA (stimulates scalp blood circulation and accelerates oil excretion). When a resistance ≥70kΩ (dry): Switches to nourishing mode, and the fluid flow rate is adjusted to 0.7ml / min; the VCSEL power is reduced to 3mW (reduces moisture loss from dry scalp); the microcurrent intensity is reduced to 100μA (avoids irritating dry scalp).

[0079] The microcurrent detection cycle is 1 second. The mainboard of the module dynamically adjusts the optical power, liquid flow rate and microcurrent intensity according to the change of resistance value (response time ≤100ms) to achieve closed-loop coordination of "state-strategy".

[0080] In some embodiments, to address the different care needs of different scalp areas (such as excessive oil secretion on the top of the head and dry temples), the comb body is divided into multiple areas (top of the head, temples, and back of the head). The camera identifies the state of each area to achieve precise liquid delivery and adjustment of the intensity of phototherapy in each area.

[0081] A wide-angle camera (120° field of view, 5 megapixel resolution) is installed at the top of the comb. The scalp is divided into three regions: the top of the head, the sideburns, and the back of the head using a semantic segmentation algorithm (such as U-Net) (segmentation accuracy ≥95%). Each area corresponds to an independent functional unit: Liquid delivery unit: including a miniature solenoid valve (controlling the flow of liquid), a liquid delivery hose (connecting to the reservoir), and two integrated toothed protrusions; Phototherapy unit: including four VCSEL chips (independently controlling the on / off state and power).

[0082] The module's mainboard analyzes the sebum secretion rate (by extracting the yellow component from the HSV color space to quantify sebum levels) and hair follicle density (by counting hair follicles using an edge detection algorithm) of each area based on the regional images captured by the camera. Taking the top of the head as an example, if the sebum secretion rate is ≥80% (oily): the two fluid-guiding tooth-shaped protrusions in that area are activated (flow rate 0.3ml / min / tooth-shaped protrusion), and the VCSEL power is adjusted to 8mW (enhanced phototherapy); if the sebum secretion rate is ≤50% (normal): the fluid-guiding tooth-shaped protrusions are deactivated, and the VCSEL power remains at 5mW (conventional phototherapy). Sideburn area: If hair follicle density ≤60 / cm² (sparse): Activate the drainage toothed protrusion (flow rate 0.6ml / min / toothed protrusion, nourishing mode), adjust VCSEL power to 6mW (gentle light therapy, avoid irritating sparse scalp); users can view the status report of each area through the APP (such as "excessive sebum secretion on the top of the head, it is recommended to increase the frequency of use of refreshing mode"), and manually adjust the area parameters (such as increasing the drainage flow rate in the sideburn area).

[0083] Please see Figure 4 As shown, Figure 4 This is a schematic diagram of the structure of the liquid guiding control device 200 of the hair growth instrument provided in this application embodiment. The liquid guiding control device 200 of the hair growth instrument is used to execute the steps of the liquid guiding control method of the hair growth instrument shown in the above embodiments. The liquid guiding control device 200 of the hair growth instrument can be a single server or a server cluster, or the liquid guiding control device 200 of the hair growth instrument can be a terminal, such as a handheld terminal, a laptop computer, a wearable device, or a robot.

[0084] like Figure 4 As shown, the liquid guiding control device 200 of the hair growth instrument includes: Pressure control unit 201 is used to control the main board of the control module to sample and detect the pressure in the liquid storage tank; The flow determination unit 202 is used to determine the corresponding target flow based on the selected mode type; wherein the mode type includes refreshing mode and nourishing mode, the refreshing mode corresponds to a first flow threshold, the nourishing mode corresponds to a second flow threshold, and the first flow threshold is less than the second flow threshold. The liquid removal unit 203 is used by the control module motherboard to adjust the pulse width modulation duty cycle of the micro air pump according to the target flow rate, so as to achieve precise control of the flow rate, control the micro air pump to pressurize the liquid storage tank so that the liquid flows out from the liquid guide tooth protrusion; the control module motherboard starts the micro air pump to pressurize in reverse, so as to remove the residual liquid in the liquid outlet micro hole.

[0085] In some embodiments, the control module motherboard samples and detects the pressure inside the liquid storage tank, including: acquiring the pressure sensor signal inside the liquid storage tank in real time through the analog-to-digital conversion module on the module motherboard to obtain the pressure inside the liquid storage tank.

[0086] In some embodiments, determining the target flow rate based on the selected mode type includes: if the user selects the refreshing mode, setting the target flow rate to 0.1 to 0.3 ml per minute; if the user selects the nourishing mode, setting the target flow rate to 0.5 to 0.8 ml per minute.

[0087] In some embodiments, the control module motherboard adjusts the pulse width modulation duty cycle of the micro air pump according to the target flow rate, including: establishing a mapping table between the target flow rate and the pulse width modulation duty cycle, retrieving the corresponding duty cycle parameter from the mapping table according to the target flow rate and sending it to the micro air pump.

[0088] In some embodiments, controlling the micro air pump to pressurize the liquid storage tank to cause the liquid to flow out from the guide tooth-shaped protrusion includes: the micro air pump operating with a set pulse width modulation duty cycle, applying a pressure of 0.1-0.3 MPa to the liquid storage tank through the silicone hose, causing the liquid to flow out through the liquid outlet micropores of the guide tooth-shaped protrusion.

[0089] In some embodiments, the control module motherboard activates a micro air pump to reverse pressurize and remove residual liquid from the liquid outlet micropores, including: controlling the module motherboard to periodically trigger the micro air pump to run in reverse, thereby generating an instantaneous reverse airflow in the liquid storage tank through reverse pressurization, and flushing the liquid outlet micropores of the guide tooth-shaped protrusions.

[0090] In some embodiments, the method further includes: controlling the module motherboard to acquire scalp images through the camera on the comb body, analyzing the scalp hair follicle status using an image recognition algorithm, automatically recommending a refreshing mode or a nourishing mode based on the analysis results, and adjusting the pulse width modulation duty cycle of the micro air pump.

[0091] In some embodiments, the method further includes: controlling the main board of the module to monitor the liquid level in the storage tank in real time; when the level is detected to be lower than a preset threshold, issuing a liquid replenishment prompt through the indicator light on the comb body, and automatically reducing the pulse width modulation duty cycle of the micro air pump to reduce the flow rate.

[0092] In some embodiments, the method further includes: controlling the module motherboard to generate a personalized fluid delivery plan based on the input usage duration and frequency data using a preset intelligent algorithm, and dynamically adjusting the working cycle and pulse width modulation duty cycle of the micro air pump to adapt to the scalp care needs of different users.

[0093] It should be noted that those skilled in the art will understand that, for the sake of convenience and brevity, the specific working process of the liquid guiding control device and each module of the hair growth instrument described above can be referred to the corresponding content in the various embodiments of the liquid guiding control method of the hair growth instrument, and will not be repeated here.

[0094] The aforementioned method for controlling the fluid delivery of the hair regrowth instrument can be implemented as a computer program, which can be used in, for example... Figure 4 It runs on the device shown.

[0095] Please see Figure 5 , Figure 5 This is a schematic block diagram of the structure of a hair growth device provided in an embodiment of this application. The hair growth device includes a processor, a memory, and a network interface connected via a device bus, wherein the memory may include a storage medium and internal memory.

[0096] The storage medium can store operating devices and computer programs. The computer program includes program instructions that, when executed, cause the processor to perform any fluid control method of the hair growth instrument.

[0097] The processor provides computing and control capabilities to support the operation of the entire hair growth device.

[0098] The internal memory provides an environment for the execution of computer programs in non-volatile storage media. When the computer program is executed by the processor, it enables the processor to execute any liquid control method of a hair growth instrument.

[0099] This network interface is used for network communication, such as sending assigned tasks. Those skilled in the art will understand that... Figure 5The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the terminal to which the present application is applied. Specific hair growth instruments may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0100] It should be understood that the processor can be a Central Processing Unit (CPU), but it can also be 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. Among these, a general-purpose processor can be a microprocessor or any conventional processor.

[0101] In one embodiment, the processor is configured to run a computer program stored in memory to perform the following steps: The control module motherboard samples and detects the pressure inside the liquid storage tank; The target traffic is determined based on the selected mode type; the mode type includes refreshing mode and nourishing mode, the refreshing mode corresponds to a first traffic threshold, the nourishing mode corresponds to a second traffic threshold, and the first traffic threshold is less than the second traffic threshold. The control module motherboard adjusts the pulse width modulation duty cycle of the micro air pump according to the target flow rate to achieve precise flow control and control the micro air pump to pressurize the liquid storage tank so that the liquid flows out from the guide tooth protrusion. The control module motherboard starts the micro air pump to apply reverse pressure in order to remove residual liquid from the liquid outlet micropores.

[0102] In some embodiments, the control module motherboard samples and detects the pressure inside the liquid storage tank, including: acquiring the pressure sensor signal inside the liquid storage tank in real time through the analog-to-digital conversion module on the module motherboard to obtain the pressure inside the liquid storage tank.

[0103] In some embodiments, determining the target flow rate based on the selected mode type includes: if the user selects the refreshing mode, setting the target flow rate to 0.1 to 0.3 ml per minute; if the user selects the nourishing mode, setting the target flow rate to 0.5 to 0.8 ml per minute.

[0104] In some embodiments, the control module motherboard adjusts the pulse width modulation duty cycle of the micro air pump according to the target flow rate, including: establishing a mapping table between the target flow rate and the pulse width modulation duty cycle, retrieving the corresponding duty cycle parameter from the mapping table according to the target flow rate and sending it to the micro air pump.

[0105] In some embodiments, controlling the micro air pump to pressurize the liquid storage tank to cause the liquid to flow out from the guide tooth-shaped protrusion includes: the micro air pump operating with a set pulse width modulation duty cycle, applying a pressure of 0.1-0.3 MPa to the liquid storage tank through the silicone hose, causing the liquid to flow out through the liquid outlet micropores of the guide tooth-shaped protrusion.

[0106] In some embodiments, the control module motherboard activates a micro air pump to reverse pressurize and remove residual liquid from the liquid outlet micropores, including: controlling the module motherboard to periodically trigger the micro air pump to run in reverse, thereby generating an instantaneous reverse airflow in the liquid storage tank through reverse pressurization, and flushing the liquid outlet micropores of the guide tooth-shaped protrusions.

[0107] In some embodiments, the method further includes: controlling the module motherboard to acquire scalp images through the camera on the comb body, analyzing the scalp hair follicle status using an image recognition algorithm, automatically recommending a refreshing mode or a nourishing mode based on the analysis results, and adjusting the pulse width modulation duty cycle of the micro air pump.

[0108] In some embodiments, the method further includes: controlling the main board of the module to monitor the liquid level in the storage tank in real time; when the level is detected to be lower than a preset threshold, issuing a liquid replenishment prompt through the indicator light on the comb body, and automatically reducing the pulse width modulation duty cycle of the micro air pump to reduce the flow rate.

[0109] In some embodiments, the method further includes: controlling the module motherboard to generate a personalized fluid delivery plan based on the input usage duration and frequency data using a preset intelligent algorithm, and dynamically adjusting the working cycle and pulse width modulation duty cycle of the micro air pump to adapt to the scalp care needs of different users.

[0110] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, causes the processor to implement the steps of the fluid control method for a hair growth instrument as provided in any embodiment of this application.

[0111] The computer-readable storage medium can be the internal storage unit of the hair growth instrument described in the foregoing embodiments, such as the hard disk or memory of the hair growth instrument. Alternatively, the computer-readable storage medium can be an external storage device of the hair growth instrument, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc., equipped on the hair growth instrument.

[0112] 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 equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered 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 controlling the flow of fluid in a hair growth instrument, characterized in that, This invention relates to a hair growth device, which includes a comb body, light-guiding tooth-shaped protrusions on the comb body, and a micro-current conductive structure. The light-guiding tooth-shaped protrusions have light-guiding holes from which a vertical cavity surface-emitting laser (VCSEL) emits light. The light-guiding tooth-shaped protrusions are made of a combination of silicone and metal, with the portion in contact with the scalp being made of metal to generate a micro-current. A micro-air pump is connected to a main board module, which in turn is connected to a button board and a battery in the main body via spring pin terminals to power the micro-air pump. The micro-air pump is connected to a liquid storage tank. The method includes: The control module motherboard samples and detects the pressure inside the liquid storage tank; The target traffic is determined based on the selected mode type; the mode type includes refreshing mode and nourishing mode, the refreshing mode corresponds to a first traffic threshold, the nourishing mode corresponds to a second traffic threshold, and the first traffic threshold is less than the second traffic threshold. The control module motherboard adjusts the pulse width modulation duty cycle of the micro air pump according to the target flow rate to achieve precise flow control. It controls the micro air pump to pressurize the liquid storage tank so that the liquid flows out from the guide tooth protrusion. The control module motherboard starts the micro air pump to pressurize in reverse to remove residual liquid in the liquid outlet microhole.

2. The method according to claim 1, characterized in that, The control module motherboard samples and detects the pressure inside the liquid storage tank, including: The pressure inside the liquid storage tank is obtained in real time by acquiring the pressure sensor signal inside the liquid storage tank through the analog-to-digital conversion module on the main board of the module.

3. The method according to claim 1, characterized in that, The step of determining the corresponding target traffic based on the selected mode type includes: If the user selects the refreshing mode, set the target flow rate to 0.1 to 0.3 ml per minute; if the user selects the nourishing mode, set the target flow rate to 0.5 to 0.8 ml per minute.

4. The method according to claim 1, characterized in that, The control module motherboard adjusts the pulse width modulation duty cycle of the micro air pump according to the target flow rate, including: A mapping table between the target flow rate and the pulse width modulation duty cycle is established. The corresponding duty cycle parameter is retrieved from the mapping table according to the target flow rate and sent to the micro air pump.

5. The method according to claim 1, characterized in that, The control of the micro air pump to pressurize the liquid storage tank and cause the liquid to flow out from the toothed protrusions includes: The micro air pump operates with a set pulse width modulation duty cycle, applying a pressure of 0.1-0.3 MPa to the liquid storage tank through the silicone hose, causing the liquid to flow out through the liquid outlet micro-holes of the guide tooth-shaped protrusions.

6. The method according to claim 1, characterized in that, The control module motherboard activates a micro air pump to apply reverse pressure to remove residual liquid from the liquid outlet micropores, including: The mainboard of the control module periodically triggers the micro air pump to run in reverse, thereby generating an instantaneous reverse airflow in the liquid storage tank by reverse pressurization, which flushes the liquid outlet micro-holes of the liquid guide tooth-shaped protrusions.

7. The method according to claim 1, characterized in that, The method further includes: The mainboard of the control module acquires scalp images through the camera on the comb body, analyzes the scalp hair follicle status using image recognition algorithms, automatically recommends a refreshing mode or a nourishing mode based on the analysis results, and adjusts the pulse width modulation duty cycle of the micro air pump.

8. The method according to claim 1, characterized in that, The method further includes: The mainboard of the control module monitors the liquid level in the storage tank in real time. When the level is detected to be lower than a preset threshold, a liquid replenishment prompt is issued through the indicator light on the comb body, and the pulse width modulation duty cycle of the micro air pump is automatically reduced to reduce the flow rate.

9. The method according to claim 1, characterized in that, The method further includes: The control module motherboard generates a personalized fluid delivery plan based on the input usage duration and frequency data through a preset intelligent algorithm, and dynamically adjusts the working cycle and pulse width modulation duty cycle of the micro air pump to adapt to the scalp care needs of different users.

10. A hair regrowth device, characterized in that, The hair growth device includes a comb body, light-guiding tooth-shaped protrusions disposed on the comb body, and a micro-current conductive structure. The light-guiding tooth-shaped protrusions are provided with light-guiding holes, and laser light from a vertical cavity surface-emitting laser is emitted from the light-guiding holes. The light-guiding tooth-shaped protrusions are made of a material combining silicone and metal, with the part in contact with the scalp being made of metal to generate a micro-current. A micro air pump is connected to a module main board, and the module main board is connected to a button board and a battery in the main body through spring pin terminals to power the micro air pump. The micro air pump is connected to a liquid storage tank. The device also includes a processor, which is used to implement the method as described in any one of claims 1-9.

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