An enzymatic unhairing apparatus and method for reducing hydrogen sulfide from the source

Abstract

This invention discloses an enzymatic hair removal device and method for reducing hydrogen sulfide at the source. It aims to use a biological enzyme bath as the hair removal solution to avoid the malodorous smell of hydrogen sulfide and sulfide pollution in wastewater caused by traditional depilatory agents such as sodium sulfide or sodium hydrosulfide. The device includes a housing, a rotating drum, and a comb plate. The housing has a storage chamber and a hair discharge port on the front. The rotating drum is located within the storage chamber, with hair discharge grooves on its circumference, radially protruding protrusions on its inner side, and comb teeth on its outer circumference. The comb plate is inclined within the drum, with one side contacting the circumference of the drum and the other side extending from the hair discharge port to the outside of the housing. The side of the comb plate in contact with the drum has comb grooves corresponding to the comb teeth. During the hair removal process, the rotating drum and the comb plate work together to promptly collect and discharge shed animal hair, preventing it from tangling and forming balls, reducing the amount of hair retained in the storage chamber, and mitigating the problems of reduced enzyme concentration and decreased hair removal efficiency caused by hair adsorbing the hair removal solution.

Description

Technical Field

[0001] This invention relates to the field of animal skin hair removal technology, and in particular to an enzymatic hair removal device and method for reducing hydrogen sulfide at the source. Background Technology

[0002] Hair removal is an essential step in the leather tanning process. Traditionally, this process uses chemicals such as sodium sulfide and sodium hydrosulfide. The use of these chemicals leads to the generation of hydrogen sulfide gas in the leather tanning environment, causing foul odor pollution and significantly increasing the concentration of sulfur ions in wastewater. In contrast, bio-enzymatic hair removal technology has advantages such as high hair removal efficiency and environmental friendliness. It can reduce or even eliminate the use of sulfides at the source, thereby avoiding the generation of characteristic odorous substances (hydrogen sulfide) in leather tanning and reducing wastewater load.

[0003] The basic principle of enzymatic hair removal is as follows: Animal skin is placed in hair removal equipment, and a hair removal solution containing a specific concentration of protease is added. The protease catalyzes and hydrolyzes the epidermis of the animal skin, as well as the connecting proteins between the hair root and the hair follicle, weakening the connections between the hair root and the hair follicle, the hair bulb and the dermal papilla, and the epidermis and the dermis. Under subsequent mechanical action, the hair and epidermis can then be removed from the skin, achieving separation of the hair from the skin plate.

[0004] Currently, bio-enzymatic hair removal widely employs rotary drum devices. For example, Chinese patent application number CN202320505693.4 discloses a leather hair removal device, whose structure includes a working box with an upward-opening working chamber. A cover is mounted on the working box above the working chamber. A rotary drum is rotatably connected inside the working box, and the drum has several filter holes and a first drive mechanism for rotating the drum. This mechanism includes a reversing mechanism for driving the drum to rotate alternately clockwise and counterclockwise. However, when using such rotary drum devices for hair removal, although automatic removal of animal hair is achieved, a large amount of the removed animal hair remains inside the drum, tangling and forming hair balls. This problem not only reduces the efficiency and quality of subsequent hair recycling but also reduces the hair removal efficiency of animal hides due to the large amount of hair absorbing the hair removal solution. Summary of the Invention

[0005] Therefore, to address the aforementioned shortcomings, this invention provides an enzymatic hair removal device and method for reducing hydrogen sulfide at its source. This device and method use a protease bath as the hair removal medium, utilizing the catalytic hydrolysis of the protease, combined with appropriate mechanical action and hair retrieval and recovery functions, to achieve efficient separation of hair from the hide. This avoids the malodorous hydrogen sulfide and sulfide pollution in wastewater caused by traditional depilatory agents such as sodium sulfide or sodium hydrosulfide. During the hair removal process, detached animal hair can be promptly retrieved and discharged, preventing tangling and balling, while reducing the amount of hair retained in the storage chamber. This overcomes the problem of reduced enzyme concentration and decreased hair removal efficiency caused by a large amount of hair adsorbing the depilatory solution.

[0006] On one hand, the present invention provides an enzymatic hair removal device for reducing hydrogen sulfide at its source, comprising: The box has a liquid storage chamber inside and a filament discharge port that communicates with the liquid outlet chamber is provided on the front side of the box. The rotating drum is integrally set inside the liquid storage chamber. A second power device installed on the outside of the housing drives the rotating drum to rotate circumferentially. The rotating drum includes a drum body with a hair removal groove on its circumferential surface. The hair removal groove extends along the axial direction of the drum body and is set at equal angles along the circumferential direction of the drum body. A radially protruding protrusion is provided on the inner side of the drum body. The protrusion extends along the axial direction of the drum body and is arranged at equal angles along the circumferential direction of the drum body. A comb tooth is also provided on the outer circumferential surface of the rotating drum. The comb tooth is arranged at equal intervals along the axial direction of the drum body to form a comb tooth group. The comb tooth group is arranged at equal angles along the circumferential direction of the rotating drum to form a comb tooth structure. The end of the comb tooth away from the drum body is bent. The comb plate is inclinedly installed inside the drum. One side of the comb plate contacts the circumference of the drum body, and the other side extends from the hair discharge port to the outside of the box body. The side of the comb plate that contacts the drum body has a comb groove, which corresponds to the arrangement of comb teeth in each group.

[0007] Furthermore, movable grooves are provided on the side walls on the left and right sides of the box body, and a connecting rod is integrally provided on the side of the comb plate. The connecting rod passes through the movable groove and is connected to the movable block. A micro vibration device is provided on the movable block, and the movable block is connected to the fixed part fixedly installed on one side of the box body through an elastic element.

[0008] Furthermore, the drum body is open at one end and closed at the other end; The box has a material inlet on one side, which is located at the open end of the drum body. The material inlet connects the outside world with the drum body through the material inlet, and a sealing cover is also provided at the material inlet.

[0009] Furthermore, a downwardly inclined guide groove is connected to the lowest height side of the hair removal opening, and the comb plate is positioned above the guide groove on the side away from the drum body.

[0010] Furthermore, hair removal devices also include: A sensing device is used to detect the physicochemical parameters of the hair removal solution in the reservoir, including temperature, pH value and conductivity. A central controller, communicatively connected to the sensing device and the second power device, is used to acquire physical and chemical parameters, calculate the reaction efficiency index based on the physical and chemical parameters, calculate the optimal mechanical action intensity based on the reaction efficiency index, and match the drive mode of the second power device on the drum according to the optimal mechanical action intensity. Based on the drive mode of the second power device on the drum, the central controller calculates the drum speed, the duration of a single forward / reverse rotation, and the pause time according to the optimal mechanical action intensity. Based on the calculated drum speed, the duration of a single forward / reverse rotation, and the pause time, a control signal for the second power device is generated and sent to the second power device so that the second power device operates according to the control signal. The drive modes of the second power device on the drum include a first drive mode, a second drive mode, and a third drive mode.

[0011] Furthermore, the specific method for calculating the reaction efficiency index based on physicochemical parameters is as follows: ; in, C t for t The reaction efficiency index at any given moment; N t for t pH value normalized score at time; M t for t Scoring of the rate of change of conductivity at any given time; R t for t Temperature normalization score at any given time; α , β , γ The weighting factors are, in order: pH weighting factor, conductivity change rate weighting factor, and temperature weighting factor.

[0012] Furthermore, the specific method for calculating the optimal mechanical action intensity based on the reaction efficiency index is as follows: ; in, τ t for t The optimal mechanical force intensity at any given time; K p This is the proportional gain coefficient; n It is a non-linear exponent, and n ≥1; τ 0 is the basic mechanical strength; K dThe differential gain coefficient; The rate of change of the degree of inadequacy of materialized efficiency.

[0013] Furthermore, the calculation of drum speed, single forward / reverse rotation duration, and pause time based on optimal mechanical action intensity includes: ; in, ω t for t Output speed at any given time; ω 0 This is the reference speed in the corresponding drive mode; δ This is the speed adjustment coefficient; τ 1 represents the lower limit of mechanical action intensity obtained for the corresponding driving mode; The specific method for calculating the duration of a single forward / reverse rotation is as follows: ; Among them, the t 1 The duration of a single forward / reverse rotation; t 0 This is the baseline duration in the corresponding drive mode; The pause time is calculated as follows: ; Among them, the t 2 This is a pause time; This is the baseline pause time for the corresponding drive mode.

[0014] Furthermore, the specific method for matching the drive mode of the second power unit to the drum based on the optimal mechanical action intensity is as follows: like τ t If the value is less than or equal to the first threshold, then the second power unit drives the drum in the first drive mode. like τ t If the value is greater than the first threshold and less than or equal to the second threshold, then the driving mode of the second power device for the drum is the second driving mode. like τ t If the value is greater than the second threshold, then the second power unit drives the drum in the third drive mode.

[0015] On the other hand, the present invention also provides a method for controlling the above-mentioned enzymatic hair removal device for reducing hydrogen sulfide at its source, the method comprising: Obtain the physicochemical parameters and calculate the reaction efficiency index based on the physicochemical parameters; Calculate the optimal mechanical action intensity based on the reaction efficiency index; The drive mode of the second power unit for the rotating drum is matched according to the optimal mechanical action intensity; Based on the driving mode of the drum by the second power unit, the drum speed, the duration of a single forward / reverse rotation, and the pause time are calculated according to the optimal mechanical action intensity. The second power unit control signal is generated based on the calculated drum speed, the duration of a single forward / reverse rotation, and the pause time, and is sent to the second power unit so that the second power unit can operate according to the second power unit control signal.

[0016] The present invention has the following advantages: This invention uses a protease solution as the hair removal medium. This protease catalyzes the hydrolysis of the epidermis and the connecting proteins between the hair root and follicle, weakening the connections between the hair root and follicle, the hair bulb and dermal papilla, and the epidermis and dermis. This allows the hair and epidermis to detach from the skin under mechanical action, thus achieving separation of the hair from the pelt. Compared to traditional sulfide hair removal methods, this method reduces the hydrogen sulfide odor problem and sulfide pollution in wastewater caused by depilatory agents such as sodium sulfide or sodium hydrosulfide at the source.

[0017] During the hair removal process, the protrusions on the inside of the drum enhance the mechanical effects of throwing, suspending, and hooking the animal skin as the drum rotates. This mechanical effect, combined with the catalytic hydrolysis of proteases, creates a synergistic effect, further weakening the connection between the hair root and follicle, and between the epidermis and dermis, thus making it more conducive to the removal of hair and epidermis.

[0018] Furthermore, as the drum rotates, the comb teeth promptly scoop up the detached animal hair from the depilatory solution, preventing it from tangling and forming balls. When the comb teeth pass through the grooves of the comb plate, the hair is detached from the teeth by the resistance of the comb plate and discharged from the hair outlet along the inclined comb plate. This design effectively reduces the amount of hair retained in the liquid reservoir, thereby mitigating the problem of decreased enzyme concentration and reduced depilatory efficiency caused by a large amount of retained hair adsorbing the depilatory solution. Attached Figure Description

[0019] Figure 1 This is a side view of the hair removal equipment; Figure 2 yes Figure 1 A cross-sectional schematic diagram of the hair removal equipment shown; Figure 3 yes Figure 2 The diagram shows the structure of the rotating drum in the hair removal device. Figure 4 yes Figure 2 A partial structural diagram of the comb plate in the hair removal device shown. Figure 5 yes Figure 1 A schematic diagram of the first structure of the housing in the hair removal device shown; Figure 6 yes Figure 5 The diagram shows the second structural schematic of the box. Figure 7 yes Figure 1 The diagram shows the structural schematic of the support components in the hair removal device. Figure 8 yes Figure 1 The diagram shows the control logic of the hair removal device. Figure 9 This is a flowchart illustrating the control method; In the picture: 100. Support assembly; 110. Fixed support; 120. Movable support; 130. Connecting rod; 140. First power unit; 200, housing; 210, feed inlet; 220, feed guide chute; 230, lint discharge port; 240, liquid inlet; 250, liquid outlet; 260, movable trough; 300. Second power unit; 400. Sealing cap; 500. Rotary drum; 510. Drum body; 511. Hair removal groove; 520. Protrusion; 530. Comb teeth; 600. Comb plate; 610. Comb groove; 700. Liquid storage chamber; 800. Miniature vibration device; 900, Activity Block; 1000, Elastic components; 1100. Fixing part; 1200. Sensing device; 1300, Central Controller. Detailed Implementation

[0020] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0021] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0022] As described in the background section, while enzyme hair removal using a drum device can achieve automatic hair removal, a large amount of the shed hair remains inside the drum, tangling and forming hair balls. This not only reduces the efficiency and quality of subsequent hair recycling but also decreases the hair removal efficiency of the animal skin due to the large amount of hair absorbing the hair removal solution.

[0023] Example 1: Therefore, in order to solve the above-mentioned problems in the prior art, this embodiment provides an enzymatic hair removal device that reduces hydrogen sulfide at its source. For example... Figure 1 , Figure 2 As shown, the hair removal device includes: The housing is 200, and the housing contains a liquid storage chamber 700, such as... Figure 5 As shown, a filament discharge port 230 communicating with the liquid outlet chamber is provided on the front side of the box. The rotating drum 500 is integrally disposed within the liquid storage chamber. A second power device installed on the outside of the housing drives the drum to rotate circumferentially. Figure 3 As shown, the rotating drum includes a drum body 510, on which a hair removal groove 511 is provided on the circumferential surface. The hair removal groove extends along the axial direction of the drum body and is arranged at equal angles along the circumferential direction of the drum body. A radially protruding protrusion 520 is provided on the inner side of the drum body. The protrusion extends along the axial direction of the drum body and is arranged at equal angles along the circumferential direction of the drum body. A comb tooth 530 is also provided on the outer circumferential surface of the rotating drum. The comb tooth is arranged at equal intervals along the axial direction of the drum body to form a comb tooth group. The comb tooth group is arranged at equal angles along the circumferential direction of the rotating drum to form a comb tooth structure. The end of the comb tooth away from the drum body is bent. The comb plate 600 is inclinedly installed inside the drum body. One side of the comb plate contacts the circumferential surface of the drum body, and the other side extends from the hair discharge port to the outside of the housing. Figure 4 As shown, the comb plate has a comb groove on the side that contacts the drum body, and the comb groove corresponds to the arrangement of comb teeth in each group.

[0024] Specifically, the second power unit can be a servo motor, a stepper motor, or other device capable of driving the drum to rotate. In this embodiment, the second power unit can be connected to the drum through a sprocket drive mechanism, a synchronous belt pulley drive mechanism, or other mechanisms capable of power transmission.

[0025] This embodiment uses a protease bath as a hair removal medium. The protease catalyzes and hydrolyzes the connective proteins between the animal skin's epidermis and the hair root and follicle, weakening the connections between the hair root and follicle, the hair bulb and dermal papilla, and the epidermis and dermis. This allows the hair and epidermis to detach from the skin under mechanical action, thus achieving separation of the hair from the hide. Compared to traditional sulfide hair removal methods, this embodiment reduces the hydrogen sulfide odor problem and sulfide pollution in wastewater caused by depilatory agents such as sodium sulfide or sodium hydrosulfide at the source. During the hair removal process, the protrusions on the inner side of the drum enhance the mechanical action of throwing, suspending, and hooking the animal skin as the drum rotates. This mechanical action, combined with the catalytic hydrolysis of the protease, creates a synergistic effect, further weakening the connections between the hair root and follicle, and between the epidermis and dermis, thus facilitating hair removal. Furthermore, as the drum rotates, the comb teeth promptly retrieve the detached animal hair from the hair removal solution, preventing it from tangling and forming balls. When the comb teeth pass through the comb tooth grooves of the comb tooth plate, the hair is detached from the comb teeth by the blocking effect of the comb tooth plate and discharged from the hair discharge port along the inclined comb tooth plate. This design can effectively reduce the amount of hair retained in the liquid storage chamber, thereby improving the problem of reduced enzyme concentration and decreased hair removal efficiency caused by a large amount of hair retained in the liquid storage chamber adsorbing the hair removal solution.

[0026] In this embodiment, as Figure 5 As shown, movable slots 260 are provided on the side walls of the left and right sides of the box, such as... Figure 1 As shown, a connecting rod is integrally provided on the side of the comb plate. The connecting rod passes through the movable groove and is connected to the movable block 900. A micro vibration device 800 is provided on the movable block. The movable block is connected to the fixed part 1100 fixedly installed on one side of the box body through the elastic element 1000.

[0027] This embodiment utilizes a micro-vibration device to drive the comb plate to vibrate, allowing detached hairs to quickly slide off the inclined comb plate, reducing hair retention on the comb plate surface. The elastic element absorbs the vibration impact generated by the micro-vibration device, reducing the transmitted damage to core components such as the housing and drum, and minimizing mechanical wear during equipment operation.

[0028] In this embodiment, as Figure 3 As shown, one end of the drum body is open, and the other end is closed; The box has a material inlet 210 on one side, which is set corresponding to the open end of the drum body. The material inlet connects the outside world with the drum body through the material inlet. A sealing cover 400 is also provided at the material inlet.

[0029] Animal hides can be easily fed in through the feed inlet and quickly removed after hair removal without disassembling the drum or other complicated operations. Feeding and unloading are simple, and the sealing cover at the feed inlet can isolate the box from the outside world during hair removal operations.

[0030] In this embodiment, as Figure 5 As shown, a downwardly inclined guide groove 220 is connected to the side of the lowest height of the hair discharge port, and the comb plate is located above the guide groove on the side away from the drum body.

[0031] Hair sliding off the comb plate falls directly into the guide trough. With the help of the trough's tilt angle and gravity, the hair can slide smoothly down the trough, which can improve the problem of hair accumulating and getting stuck at the edge of the hair discharge port. The directional guiding effect of the guide trough can concentrate the discharged hair to the preset collection container, improving the efficiency and convenience of hair recycling.

[0032] In addition, such as Figure 6 As shown, an inlet 240 and an outlet 250 are provided on the opposite side of the material outlet side. The inlet is connected to the upper part of one side of the liquid storage chamber, and the outlet is connected to the bottom of one side of the liquid storage chamber.

[0033] In addition, the hair removal device also includes a support component 100, on which the entire housing is mounted and tilted.

[0034] like Figure 7 As shown, the support component includes: Fixed support 110; The movable support 120 is pivotally connected to the fixed support on one side. The first power unit 140 drives the movable support to pivot.

[0035] In this embodiment, the support assembly further includes a connecting rod 130, which drives the connecting rod to move linearly via a first power device. One end of the connecting rod is pivotally connected to the movable support.

[0036] The first power unit drives the movable support to tilt, adjusting the height of the hair removal port, thereby adjusting the maximum height that the hair removal liquid can be contained in the working chamber, and then making adaptive adjustments according to the specifications or quantity of the animal skins sent in.

[0037] For example, the first power unit can be selected from power units such as pneumatic cylinders, electric cylinders, and hydraulic cylinders. In this case, the support assembly may also include a connecting rod 130, which is driven to move linearly by the first power unit, with one end of the connecting rod pivotally connected to the movable support. In this case, the first power unit is pivotally mounted to the fixed support.

[0038] In addition, the first power device may also be an electric motor, which can be directly connected to the pivot shaft of the movable support to achieve the rotation of the movable support.

[0039] In this embodiment, during use, a pre-concentrated protease hair removal solution is first injected into the storage chamber of the housing, with the amount of solution sufficient for hair removal needs. Then, the sealing cap at the material inlet of the housing is opened, and the animal hide to be hair removed is placed into the drum body through the inlet. After placement, the sealing cap is closed. The second power unit installed on the outside of the housing is activated, causing the drum to rotate intermittently in both directions. During the drum's rotation, the radial protrusions on the inner side of the drum body exert continuous throwing, lifting, and hooking mechanical actions on the animal hide. Simultaneously, the hair removal solution in the storage chamber enters the drum body through the hair-removing grooves on the drum's circumference, contacting the animal hide. The protease in the hair removal solution catalyzes and hydrolyzes the epidermis and the connecting proteins between the hair root and follicle. Combined with the throwing, lifting, and hooking mechanical actions of the protrusions, this weakens the connection between the hair root and follicle, the hair bulb and dermal papilla, and the epidermis and dermis. As the hair removal process progresses, the animal hair gradually falls off the hide and disperses in the hair removal solution. During the drum's rotation, the curved teeth on its outer surface scoop up the detached hair from the depilatory solution in the storage chamber, and the hair moves with the drum. When the teeth pass through the grooves of the inclined comb plate, they pass through the grooves, and the hair is dislodged by the resistance of the comb plate. A micro-vibration device drives the comb plate to vibrate, causing the hair to slide quickly down the inclined comb plate. The hair sliding off the comb plate falls directly into the inclined guide trough at the hair discharge port. Under the inclination angle of the guide trough and the action of gravity, the hair slides smoothly down the trough and into the pre-set collection container. After the hair removal operation is completed, the second power unit and the micro-vibration device are turned off, the sealing cover is opened, and the depilated leather is removed from the feed port. If it is necessary to replace the depilatory solution or clean the equipment, the waste liquid in the storage chamber can be discharged through the liquid outlet at the bottom of the unit, and then the inside of the equipment can be cleaned.

[0040] When using enzyme preparations to remove hair from animal skin, the rate of the enzymatic reaction and the mechanical action of the drum are two key factors affecting hair removal efficiency. Generally speaking, the faster the enzymatic reaction rate and the stronger the mechanical action, the higher the hair removal efficiency. The enzymatic reaction rate mainly depends on the temperature and pH of the hair removal bath. For example, within the hair removal temperature range of 25-35°C, the higher the temperature, the faster the enzymatic reaction rate. Within the pH range of 7-10 for hair removal baths, for neutral proteases, the higher the pH, the slower the enzymatic reaction rate, while for alkaline proteases, the higher the pH, the faster the enzymatic reaction rate. Furthermore, changes in the conductivity of the hair removal bath can reflect the rate of enzyme product formation; a faster increase in conductivity indicates faster enzyme product formation.

[0041] However, with high enzyme dosages and strong mechanical action, although hair removal efficiency is extremely high, the animal skin suffers irreversible damage. This is partly because while enzymes catalyze the hydrolysis of the epidermis and the connecting proteins between hair roots and follicles, they inevitably hydrolyze collagen, reducing the quality of the bare skin. Another reason is that under continuous strong mechanical action, the animal skin rolls at high speed, collides with each other, and rubs violently, causing excessive stretching, loss of elasticity, and damage to the grain surface.

[0042] Therefore, in order to achieve reasonable control of the enzyme-catalyzed reaction rate and the intensity of mechanical action, such as Figure 8 As shown, the hair removal device also includes: The sensing device 1200 is used to detect the physicochemical parameters of the hair removal solution in the storage chamber, including temperature, pH value and conductivity. A central controller 1300 is communicatively connected to a sensing device and a second power device. The central controller acquires physical parameters, calculates a reaction efficiency index based on these parameters, calculates the optimal mechanical action intensity based on the reaction efficiency index, and matches the drive mode of the second power device on the drum based on the optimal mechanical action intensity. Based on the drive mode of the second power device on the drum, it calculates the drum speed, the duration of a single forward / reverse rotation, and the pause time based on the optimal mechanical action intensity. It then generates a control signal for the second power device based on the calculated drum speed, the duration of a single forward / reverse rotation, and the pause time, and sends it to the second power device so that the second power device operates according to the control signal. The drive modes of the second power device on the drum include a first drive mode, a second drive mode, and a third drive mode.

[0043] Specifically, the sensing devices can employ an online pH meter, a conductivity meter, and a digital temperature sensor. The combined probe of the pH meter and conductivity meter, along with the temperature sensor, can be installed in the liquid storage chamber via a pre-reserved interface on the side wall of the enclosure and connected to the analog / digital input module of the central controller. The online pH meter is used to continuously measure the pH of the hair removal solution. The conductivity meter is used to monitor changes in the solution's conductivity in real time. The digital temperature sensor (such as a Pt100 platinum resistance thermometer) is used to measure the temperature of the hair removal solution. The central controller is configured to synchronously acquire data from the above three sensors at a predetermined sampling period (e.g., 30 seconds). The central controller can be a programmable logic controller (PLC) or an embedded industrial computer, whose CPU module must have floating-point arithmetic capabilities to execute the algorithm. Furthermore, the central controller can be expanded with an analog input module for receiving sensor signals and a pulse output or analog output module for sending speed and steering control signals to the second power unit (such as a servo drive).

[0044] For example, the specific method for calculating the reaction efficiency index based on physicochemical parameters is as follows: ; in, C t for t The reaction efficiency index at any given moment; N t for t pH value normalized score at time; M t for t Scoring of the rate of change of conductivity at any given time; R t for t Temperature normalization score at any given time; α , β , γ The weighting factors are, in order: pH weighting factor, conductivity change rate weighting factor, and temperature weighting factor.

[0045] In this embodiment, the t The normalized score of pH value at any given time is determined as follows: ; in, σ t for t pH value at any given time; σ 1 This is the median of the optimal pH range; σ 2 This is the maximum permissible deviation threshold for pH.

[0046] The t The normalized score for temperature at any given time is determined as follows: ; in, T t for t Temperature at any moment; T 1 This is the median of the optimal temperature range; T 2 This is the maximum permissible temperature deviation threshold.

[0047] The t The method for determining the rate of change of conductivity at any given time is as follows: ; in, k This is the proportionality coefficient; G t This represents the rate of change of electrical conductivity.

[0048] ; in, EC t for t Conductivity at time t; EC 0 The initial conductivity; EC t for t - ∆t Conductivity at time t; ∆t The sampling period.

[0049] In this embodiment, α , β , γ They can be determined experimentally based on the specific process and enzyme characteristics; their sum is 1, for example, α =0.4, β =0.3, γ =0.3. The proportional gain coefficient, differential gain coefficient, and nonlinear exponent can be determined based on the system response characteristics, for example... K p =1.2, K d =0.5, n =2. Speed ​​adjustment coefficient δ A value of 0.1-0.3 is acceptable.

[0050] For example, the specific method for calculating the optimal mechanical action intensity based on the reaction efficiency index is as follows: ; in, τ t for t The optimal mechanical force intensity at any given time; K p This is the proportional gain coefficient; n It is a non-linear exponent, and n ≥1; τ 0 is the basic mechanical strength; K d The differential gain coefficient; The rate of change of the degree of inadequacy of materialized efficiency.

[0051] For example, calculating the drum speed, the duration of a single forward / reverse rotation, and the pause time based on the optimal mechanical action intensity includes: ; in, ω t for t Output speed at any given time; ω 0 This is the reference speed in the corresponding drive mode; δ This is the speed adjustment coefficient; τ 1 represents the lower limit of the mechanical action intensity for the corresponding driving mode; The specific method for calculating the duration of a single forward / reverse rotation is as follows: ; Among them, the t 1 The duration of a single forward / reverse rotation; t 0 This is the baseline duration in the corresponding drive mode; The pause time is calculated as follows: ; Among them, the t 2 This is a pause time; This is the baseline pause time for the corresponding drive mode.

[0052] For example, the specific method for matching the drive mode of the second power unit to the drum according to the optimal mechanical action intensity is as follows: like τ t If the value is less than or equal to the first threshold, then the second power unit drives the drum in the first drive mode. like τ t If the value is greater than the first threshold and less than or equal to the second threshold, then the driving mode of the second power device for the drum is the second driving mode. like τ t If the value is greater than the second threshold, then the second power unit drives the drum in the third drive mode.

[0053] The first drive mode (initial / mild mode) is suitable for the initial stage of the reaction. In this mode, the reference speed is low, the duration of each forward / reverse rotation is long, and the reference pause time is also long. The purpose is to start gently and promote the uniform penetration of the hair removal solution.

[0054] The second drive mode (standard / high-efficiency mode) is suitable for reactions entering their high-efficiency phase. This mode employs moderate speeds and a moderate steering switching cycle to achieve optimal synergy between biochemical and mechanical actions.

[0055] The third drive mode (enhanced mode) is suitable for situations where enhanced mechanical action is needed in the later stages of the reaction or when processing thicker hides. In this mode, a higher rotation speed is used, and the duration of forward / reverse rotation and pause time are shortened to strengthen mechanical actions such as throwing, lifting, and hooking.

[0056] This embodiment uses temperature sensors, pH meters, and conductivity meters to monitor the temperature, pH value, and conductivity of the hair removal bath solution in real time, enabling the central controller to perceive and reflect the physicochemical parameters (temperature, pH value, conductivity) of the hair removal bath solution in real time. Based on the reaction efficiency index calculated from multi-sensor data fusion, the instantaneous effectiveness of the current hair removal action can be quantified. The controller dynamically calculates and outputs the optimal mechanical action intensity based on the reaction efficiency index, and then adjusts the drum speed, rotation sequence, and pause time in real time. This allows the mechanical action intensity to automatically match and compensate for changes in enzyme hydrolysis efficiency, thereby shortening the hair removal cycle, reducing damage, and achieving high-quality bald skin while maintaining high hair removal efficiency.

[0057] Example 2: This embodiment also provides a method for controlling an enzymatic hair removal device for reducing hydrogen sulfide at its source as described in Embodiment 1, the method comprising: S100: Obtain physicochemical parameters and calculate the reaction efficiency index based on the physicochemical parameters; Specifically, in this embodiment, a sensing device installed in the liquid storage chamber collects the temperature, pH value, and conductivity of the hair removal solution at preset sampling cycles. The central controller receives this data in real time. Subsequently, the pH value and temperature data are normalized according to their deviations from the median of the preset optimal range, respectively, to obtain pH value normalization scores and temperature normalization scores. The conductivity change rate is calculated based on the conductivity values ​​of adjacent sampling cycles, and a conductivity change rate score is obtained through function mapping. Finally, the reaction efficiency index at the current moment is calculated; the specific calculation method can be found in the specific method for calculating the reaction efficiency index described in Embodiment 1.

[0058] S200: Calculate the optimal mechanical action intensity based on the reaction efficiency index; Specifically, the central controller, based on the calculated reaction efficiency index, applies a feedback control algorithm to calculate the optimal mechanical action intensity to be applied in real time. For the specific calculation method, please refer to the method for calculating the optimal mechanical action intensity described in Example 1.

[0059] S300: The drive mode of the second power unit for the drum is matched according to the optimal mechanical action strength; The central controller (1300) compares the calculated optimal mechanical action intensity with a preset threshold, thereby automatically selecting the drive mode to be executed by the second power unit.

[0060] like τ tIf the value is less than or equal to the first threshold, the second power unit drives the drum in the first drive mode (initial / mild mode), which is suitable for the initial stage of the reaction. In this mode, the reference speed is low, the duration of a single forward / reverse rotation is long, and the reference pause time is also long. The purpose is to start gently and promote the uniform penetration of the hair removal solution. like τ t If the value is greater than the first threshold and less than or equal to the second threshold, the second power unit drives the drum in the second drive mode (standard / high-efficiency mode), which is suitable for the reaction to enter the high-efficiency stage. In this mode, a medium rotation speed and a moderate steering switching cycle are used to achieve optimal synergy between enzymatic hair removal and mechanical action. like τ t If the speed exceeds the second threshold, the second power unit drives the drum in the third drive mode (enhanced mode), which is suitable for situations where enhanced mechanical action is needed in the later stages of the reaction or when processing thicker hides. In this mode, a higher rotation speed is used, and the duration of forward / reverse rotation and pause time are shortened to enhance mechanical actions such as throwing, lifting, and hooking.

[0061] S400: Based on the drive mode of the drum by the second power unit, the drum speed, the duration of a single forward / reverse rotation, and the pause time are calculated according to the optimal mechanical action intensity; Specifically, after determining the current drive mode, the central controller calculates the drum speed, the duration of a single forward / reverse rotation, and the pause time based on the preset reference parameters and the optimal mechanical action intensity of the mode. For the specific calculation method, please refer to the specific method for calculating the drum speed, the duration of a single forward / reverse rotation, and the pause time described in Example 1.

[0062] S500: Generates a control signal for the second power unit based on the calculated drum speed, the duration of a single forward / reverse rotation, and the pause time, and sends it to the second power unit so that the second power unit operates according to the control signal.

[0063] Specifically, the central controller encodes the calculated drum rotation speed, forward / reverse rotation duration, and pause time into control signals for the second power unit (such as analog speed setpoint signals and digital direction control signals). These control signals are then sent in real-time to the second power unit (such as a servo drive) via the controller output module. Based on the received signals, the second power unit drives the drum at a set rotation speed, direction sequence, and interval. This process continuously cycles throughout the hair removal operation (S100 to S500), thereby achieving dynamic and adaptive adjustment of the drum's mechanical action, ensuring optimal matching with the constantly changing physicochemical parameters until the hair removal process is complete.

[0064] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An enzymatic hair removal device for reducing hydrogen sulfide at its source, characterized in that, include: The box has a liquid storage chamber inside and a filament discharge port that communicates with the liquid outlet chamber is provided on the front side of the box. The rotating drum is integrally set inside the liquid storage chamber. A second power device installed on the outside of the housing drives the rotating drum to rotate circumferentially. The rotating drum includes a drum body with a hair removal groove on its circumferential surface. The hair removal groove extends along the axial direction of the drum body and is set at equal angles along the circumferential direction of the drum body. A radially protruding protrusion is provided on the inner side of the drum body. The protrusion extends along the axial direction of the drum body and is arranged at equal angles along the circumferential direction of the drum body. A comb tooth is also provided on the outer circumferential surface of the rotating drum. The comb tooth is arranged at equal intervals along the axial direction of the drum body to form a comb tooth group. The comb tooth group is arranged at equal angles along the circumferential direction of the rotating drum to form a comb tooth structure. The end of the comb tooth away from the drum body is bent. The comb plate is inclinedly installed inside the drum. One side of the comb plate contacts the circumference of the drum body, and the other side extends from the hair discharge port to the outside of the box body. The side of the comb plate that contacts the drum body has a comb groove, which corresponds to the arrangement of comb teeth in each group.

2. The enzymatic hair removal device for reducing hydrogen sulfide at its source according to claim 1, characterized in that, Movable grooves are provided on the side walls on both sides of the box body. A connecting rod is integrally provided on the side of the comb plate. The connecting rod passes through the movable groove and is connected to the movable block. A micro vibration device is provided on the movable block. The movable block is connected to the fixed part fixedly installed on one side of the box body through an elastic element.

3. The enzymatic hair removal device for reducing hydrogen sulfide at its source according to claim 1, characterized in that, The drum body is open at one end and closed at the other end; The box has a material inlet on one side, which is located at the open end of the drum body. The material inlet connects the outside world with the drum body through the material inlet, and a sealing cover is also provided at the material inlet.

4. The enzymatic hair removal device for reducing hydrogen sulfide at its source according to claim 1, characterized in that, An inclined guide groove is connected to the lowest height side of the hair discharge port, and the comb plate is positioned above the guide groove on the side away from the drum body.

5. The enzymatic hair removal device for reducing hydrogen sulfide at its source according to claim 1, characterized in that, Hair removal equipment also includes: A sensing device is used to detect the physicochemical parameters of the hair removal solution in the reservoir, including temperature, pH value and conductivity. A central controller, communicatively connected to the sensing device and the second power device, is used to acquire physical and chemical parameters, calculate the reaction efficiency index based on the physical and chemical parameters, calculate the optimal mechanical action intensity based on the reaction efficiency index, and match the drive mode of the second power device on the drum according to the optimal mechanical action intensity. Based on the drive mode of the second power device on the drum, the central controller calculates the drum speed, the duration of a single forward / reverse rotation, and the pause time according to the optimal mechanical action intensity. Based on the calculated drum speed, the duration of a single forward / reverse rotation, and the pause time, a control signal for the second power device is generated and sent to the second power device so that the second power device operates according to the control signal. The drive modes of the second power device on the drum include a first drive mode, a second drive mode, and a third drive mode.

6. The enzymatic hair removal device for reducing hydrogen sulfide at its source according to claim 5, characterized in that, The specific method for calculating the reaction efficiency index based on physicochemical parameters is as follows: ； in, C t for t The reaction efficiency index at any given moment; N t for t pH value normalized score at time; M t for t Scoring of the rate of change of conductivity at any given time; R t for t Temperature normalization score at any given time; α , β , γ The weighting factors are, in order: pH weighting factor, conductivity change rate weighting factor, and temperature weighting factor.

7. The enzymatic hair removal device for reducing hydrogen sulfide at its source according to claim 6, characterized in that, The specific method for calculating the optimal mechanical action intensity based on the reaction efficiency index is as follows: ； in, τ t for t The optimal mechanical force intensity at any given time; K p This is the proportional gain coefficient; n It is a non-linear exponent, and n ≥1; τ 0 is the basic mechanical strength; K d The differential gain coefficient; The rate of change of the degree of inadequacy of materialized efficiency.

8. The enzymatic hair removal device for reducing hydrogen sulfide at its source according to claim 7, characterized in that, The calculation of drum speed, single forward / reverse rotation duration, and pause time based on optimal mechanical action intensity includes: The specific method for calculating the drum rotation speed is as follows: ； in, ω t for t Output speed at any given time; ω 0 This is the reference speed in the corresponding drive mode; δ This is the speed adjustment coefficient; τ 1 represents the lower limit of mechanical action intensity obtained for the corresponding driving mode; The specific method for calculating the duration of a single forward / reverse rotation is as follows: ； Among them, the t 1 The duration of a single forward / reverse rotation; t 0 This is the baseline duration in the corresponding drive mode; The pause time is calculated as follows: ； Among them, the t 2 This is a pause time; This is the baseline pause time for the corresponding drive mode.

9. The enzymatic hair removal device for reducing hydrogen sulfide at its source according to claim 5, characterized in that, The specific method for matching the drive mode of the second power unit to the drum based on the optimal mechanical action strength is as follows: like τ t If the value is less than or equal to the first threshold, then the second power unit drives the drum in the first drive mode. like τ t If the value is greater than the first threshold and less than or equal to the second threshold, then the driving mode of the second power device for the drum is the second driving mode. like τ t If the value is greater than the second threshold, then the second power unit drives the drum in the third drive mode.

10. A method for controlling the enzymatic hair removal device for reducing hydrogen sulfide at its source as described in any one of claims 1 to 9, characterized in that, The method includes: Obtain the physicochemical parameters and calculate the reaction efficiency index based on the physicochemical parameters; Calculate the optimal mechanical action intensity based on the reaction efficiency index; The drive mode of the second power unit for the rotating drum is matched according to the optimal mechanical action intensity; Based on the driving mode of the drum by the second power unit, the drum speed, the duration of a single forward / reverse rotation, and the pause time are calculated according to the optimal mechanical action intensity. The second power unit control signal is generated based on the calculated drum speed, the duration of a single forward / reverse rotation, and the pause time, and is sent to the second power unit so that the second power unit can operate according to the second power unit control signal.

Images