Oil splashing prevention assembly, range hood and control method of range hood

Abstract

The invention discloses an oil splashing prevention assembly, a range hood and a control method of the range hood, the oil splashing prevention assembly comprises a shielding part and a telescopic driving mechanism, and the telescopic driving mechanism is used for driving the shielding part to do telescopic motion in the vertical direction; when the shielding piece downwards extends to the working position, the shielding piece can be unfolded to form a vertically-arranged shielding face, and the shielding face is located on the front side of the installation wall where the range hood is located. The shielding piece capable of vertically stretching out and drawing back is arranged at the bottom of the range hood and matched with the stretching-retracting driving mechanism to achieve automatic stretching out and drawing back of the shielding piece, when the shielding piece stretches out to the working position, a vertical shielding face can be formed and covers the front side of the range hood installation wall face, and splashing oil stains in the cooking process can be effectively prevented from making direct contact with the wall face; the kitchen range hood has the advantages that stubborn oil dirt is prevented from being formed from the source, cleaning difficulty and cleaning frequency of kitchen wall surfaces are greatly reduced, and when not used, the kitchen range hood can be stored at the bottom of the kitchen range hood without occupying extra space.

Description

Technical Field

[0001] This invention relates to the field of range hood technology, and in particular to an anti-splashing component, a range hood, and a control method thereof. Background Technology

[0002] As residents' living standards continue to improve, high-temperature stir-frying and deep-frying are becoming increasingly popular in Chinese cooking. These cooking processes often produce large amounts of splattered oil. This splattered oil easily adheres to the walls where kitchen range hoods are installed, and the high-temperature oil solidifies quickly upon contact with the walls, forming stubborn grease that is difficult to clean. Long-term accumulation of grease not only severely damages the overall aesthetics of the kitchen but also breeds bacteria and produces unpleasant odors, significantly increasing the frequency and difficulty of daily kitchen cleaning.

[0003] Currently, most conventional range hoods on the market focus on improving the efficiency of smoke extraction and noise control, without designing a dedicated protective structure for the problem of oil splattering onto the walls during cooking. Some users use manually hung oil-proof baffles for protection, but these baffles are cumbersome to install, remove, and store, hindering operation space and daily cleaning, resulting in poor usability.

[0004] Therefore, there is an urgent need for an integrated solution that can prevent oil stains from splashing onto the walls and is easy to use and store. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide an oil-splatter-proof component, a range hood and its control method to solve the problem of oil splattering on the wall when users are cooking.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides an oil splash prevention component for use in a range hood, comprising: shielding components; A telescopic drive mechanism is used to drive the blocking member to perform vertical telescopic movement; When the shielding member extends downward to the working position, it can unfold to form a vertically set shielding surface, and the shielding surface is located on the front side of the wall where the range hood is installed.

[0007] Furthermore, the bottom of the shielding member is provided with an oil-receiving structure.

[0008] Furthermore, it also includes a positioning structure for fixing the shielding member when the shielding member extends to the working position.

[0009] Furthermore, the positioning structure includes a positioning magnetic component disposed on the mounting wall where the range hood is installed, and the blocking component can be attracted and engaged with the positioning magnetic component.

[0010] Furthermore, the telescopic drive mechanism includes a motor and a connecting rod. The motor is connected to the connecting rod in a transmission manner, and the blocking member is connected to the connecting rod. The connecting rod is driven by the motor to realize the telescopic movement of the blocking member.

[0011] Furthermore, it also includes a frame and a bearing, the bearing being disposed on the frame, the connecting rod passing through the bearing, the frame having a receiving cavity, and the blocking member being housed in the receiving cavity when it retracts to a predetermined position under the drive of the motor.

[0012] Furthermore, it also includes a position sensor for detecting whether the blocking member retracts to a predetermined position.

[0013] Furthermore, it also includes a pressure sensor for detecting the pressure exerted on the barrier during retraction.

[0014] Secondly, the present invention also provides a range hood, including a range hood body and the aforementioned anti-splash oil component, wherein the range hood body is installed on a wall, and the anti-splash oil component is located at the bottom of the range hood body and near the edge of the wall.

[0015] Thirdly, the present invention also provides a control method for a range hood, comprising: In response to the start signal of the range hood, the telescopic drive mechanism is controlled to operate so as to extend the shield downward to the working position, which is user-defined or factory default setting; In response to the shutdown signal of the range hood, the telescopic drive mechanism is controlled to retract the shield upward to a predetermined position.

[0016] Furthermore, it also includes: During the upward retraction of the blocking component, the pressure on the blocking component is detected; When the pressure on the blocking component exceeds the preset value, the blocking component stops retracting upwards.

[0017] Furthermore, it also includes: Record the number of times the obstruction extends or retracts; When the preset number of retractions is reached, a cleaning prompt signal is output.

[0018] The beneficial effects of this invention compared to existing technologies are as follows: An oil-splatter-proof component, applied to a range hood, includes a shield and a telescopic drive mechanism. The telescopic drive mechanism drives the shield to extend and retract vertically. When the shield extends downward to the working position, it unfolds to form a vertically positioned shield surface located on the front side of the wall where the range hood is installed. By setting a vertically extendable shield at the bottom of the range hood, and cooperating with the telescopic drive mechanism to achieve automatic extension and retraction of the shield, when the shield extends to the working position, it forms a vertical shield surface covering the front side of the wall where the range hood is installed. This effectively prevents oil splattering during cooking from directly contacting the wall, avoiding the formation of stubborn grease from the source. This significantly reduces the difficulty and frequency of cleaning kitchen walls. Moreover, when not in use, it can be stored at the bottom of the range hood, without occupying extra space, making the overall structure compact and significantly improving the kitchen cleaning experience and tidiness.

[0019] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other objectives, features and advantages of the present invention more obvious and understandable, preferred embodiments are described in detail below. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. 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 diagram illustrating the state of an anti-splash assembly retracted to a predetermined position, provided in a specific embodiment of the present invention. Figure 2 A schematic diagram showing an anti-splash assembly extended to its working position, provided for a specific embodiment of the present invention; Figure 3 A schematic diagram of the structure of a range hood provided in a specific embodiment of the present invention; Figure 4 This is a schematic diagram of the telescopic drive mechanism provided in a specific embodiment of the present invention.

[0022] Figure 5 A flowchart of a control method for a range hood provided in a specific embodiment of the present invention. Figure 1 ; Figure 6 A flowchart of a control method for a range hood provided in a specific embodiment of the present invention. Figure 2 ; Figure 7A flowchart of a control method for a range hood provided in a specific embodiment of the present invention. Figure 3 .

[0023] Figure Labels 1. Anti-splash component; 11. Shielding component; 12. Frame; 121. Storage cavity; 13. Oil receiving structure; 14. Positioning magnetic component; 15. Motor; 16. Bearing; 17. Connecting rod; 2. Range hood body; 100. Wall surface; 200. Stove area. Detailed Implementation

[0024] The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0029] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0030] As residents' living standards continue to improve, high-temperature stir-frying and deep-frying are becoming increasingly popular in Chinese cooking. These cooking processes often produce large amounts of splattered oil. This splattered oil easily adheres to the walls where kitchen range hoods are installed, and the high-temperature oil solidifies quickly upon contact with the walls, forming stubborn grease that is difficult to clean. Long-term accumulation of grease not only severely damages the overall aesthetics of the kitchen but also breeds bacteria and produces unpleasant odors, significantly increasing the frequency and difficulty of daily kitchen cleaning.

[0031] Currently, most conventional range hoods on the market focus on improving the efficiency of smoke extraction and noise control, without designing a dedicated protective structure for the problem of oil splattering onto the walls during cooking. Some users use manually hung oil-proof baffles for protection, but these baffles are cumbersome to install, remove, and store, hindering operation space and daily cleaning, resulting in poor usability.

[0032] To address the aforementioned technical problems, this invention is proposed, and specific embodiments are described below.

[0033] like Figures 1 to 4As shown, this embodiment of the invention provides a range hood, including a range hood body 2 and an anti-splatter oil component 1. The range hood body 2 is a conventional range hood structure in the prior art, integrating core components such as a fan system and a smoke collection chamber. The range hood body 2 is fixedly installed on the kitchen wall 100 via a wall-mounted bracket, with its air inlet facing the stove area 200, for extracting cooking fumes. The anti-splatter oil component 1 is detachably installed at the bottom of the range hood body 2, near the edge of the wall 100. This installation position ensures that the protection area of ​​the anti-splatter oil component 1 matches the relative position of the wall 100 and the stove, avoiding blind spots. The detachable method can be a snap-fit ​​or screw connection. The detachable connection method facilitates the maintenance and replacement of the anti-splatter oil component 1 in the future, and also has the feasibility of mass production.

[0034] The anti-splatter oil component 1 includes a shield 11 and a telescopic drive mechanism. The telescopic drive mechanism is connected to the shield 11 via a transmission. The core function of the telescopic drive mechanism is to drive the shield 11 to extend or retract in a vertical linear motion. In actual assembly, the fixed end of the telescopic drive mechanism is detachably connected to a preset position at the bottom of the range hood body 2, while its power output end is connected to the top of the shield 11. When the range hood receives a start signal, the telescopic drive mechanism can drive the shield 11 to extend downwards until it reaches the preset working position. At this time, the shield 11 can naturally unfold to form a vertically set shielding surface. This shielding surface is located on the front side of the wall 100 where the range hood is installed, and its coverage area can completely cover the area of ​​the wall 100 from below the range hood body 2 to above the stove, thereby forming a physical protective barrier between the wall 100 and the cooking area. This can directly block the oil splattered during high-temperature stir-frying, deep-frying, and other cooking operations, preventing the oil splatter from directly contacting the wall 100 and forming stubborn grease.

[0035] The shielding component 11 is a curtain wall structure made of flexible, high-temperature resistant material, which can flexibly switch its shape during expansion and contraction. For example, it can be made of ETFE film, PC board, or PTFE fabric. When retracted, the shielding component 11 can be rolled up or folded and stored at the bottom of the range hood body 2, without taking up extra space in the kitchen and preventing the shielding component 11 from being exposed to dust for a long time. When extended downwards to the working position, the flexible shielding component 11 can automatically unfold into a flat vertical shielding surface under its own tension, ensuring the integrity of the protection.

[0036] The vertical shielding surface formed by the shielding component 11 of the anti-splashing component 1 in the working position can directly intercept splashed oil stains, avoid the problem of oil stains adhering to the wall 100, greatly reduce the cleaning burden of the kitchen wall 100, and at the same time maintain the cleanliness and beauty of the kitchen environment; in addition, the shielding component 11 can be flexibly switched between storage and unfolding, and does not affect the normal use of the kitchen space when not in use, and the telescopic drive mechanism operates smoothly and can accurately control the telescopic stroke of the shielding component 11 to adapt to the protection needs of different cooking scenarios.

[0037] exist Figure 3 In the illustrated embodiment, the bottom of the shield 11 is provided with an oil-receiving structure 13. The oil-receiving structure 13 is an elongated strip shape and is made of a high-temperature resistant material. An oil-receiving groove is formed along the length of the oil-receiving structure 13. The oil-receiving groove is an elongated groove structure with its opening facing upwards. The width of the oil-receiving groove is greater than the thickness of the shield 11, and its length is slightly greater than the length of the shield 11, ensuring that all oil flowing down the surface of the shield 11 can be collected into the oil-receiving groove without any missed spots. The walls of the oil-receiving groove are made of an oil-resistant, non-stick material.

[0038] The bottom of the oil receiving structure 13 and the shielding member 11 can be fixed by means of a buckle or screw connection.

[0039] When the shield 11 extends downward to the working position under the drive of the telescopic drive mechanism, the oil collection tray moves down synchronously with the shield 11 to the preset height above the stove. During cooking, the oil that splashes onto the surface of the shield 11 will flow downward along the vertical shield under the action of gravity and eventually collect in the oil collection tray for centralized storage.

[0040] To further enhance the applicability of the oil receiving structure 13, an oil-guiding flange can be added to the opening of the oil receiving tank. This flange extends inwardly along the circumference of the opening, guiding and converging the oil flowing down along the shield 11, preventing oil from dripping from the edge of the tank onto the stove or floor during its flow. Additionally, an oil level indicator can be installed on the inner wall of the oil receiving tank. When the oil accumulates to the indicated level, it reminds the user to clean it promptly, preventing oil overflow.

[0041] The oil-collecting structure 13 can collect the oil flowing down the shield 11, preventing oil from dripping onto the stove, floor and other areas. It achieves full-area interception of oil from a spatial perspective, protecting the wall 100 while also handling the oil flowing down in a friendly manner, making it easy for users to clean.

[0042] In some embodiments, the anti-splash assembly 1 further includes a positioning structure for fixing the shield 11 when it extends to the working position. The positioning structure may be a magnetic positioning structure, a snap-on positioning structure, or an electromagnetic induction positioning structure.

[0043] The core function of the positioning structure is to stabilize and limit the shield 11 when it extends downward to the working position, so as to prevent the shield 11 from shifting due to the vibration of the cooking stove, the impact of airflow or its own weight, thereby ensuring the stability and integrity of the oil splash protection.

[0044] exist Figure 2 In the embodiment shown, the positioning structure includes a positioning magnetic member 14 disposed on the mounting wall 100 where the range hood is located, and the blocking member 11 can be attracted and engaged with the positioning magnetic member 14.

[0045] The positioning magnetic component 14 is fixed to the wall 100 by adhesive or screw. When the screw is used, the back of the positioning magnetic component 14 is integrally formed with a mounting boss, and the boss has a threaded hole. During assembly, the positioning magnetic component 14 is fixed to the wall 100 at a preset position by expansion bolts. This preset position corresponds precisely to the downward extension working position of the shielding component 11, specifically the orthogonal projection area of ​​the bottom end of the shielding component 11 in the working state.

[0046] The adsorption surface of the positioning magnetic component 14 can be polished and rust-proofed, and the surface is covered with a high-temperature resistant and oil-proof coating to prevent kitchen grease from adhering or magnet oxidation under high temperature conditions, ensuring long-term stability of magnetic adsorption performance.

[0047] exist Figure 2 In the embodiment shown, the oil receiving structure 13 is integrally stamped from iron material. It not only has the basic function of receiving oil stains, but also can form a magnetic attraction with the positioning magnetic suction component 14 on the wall 100 by means of the magnetic conductivity of its own iron material, so as to realize the dual linkage between the oil receiving structure 13 and the positioning magnetic suction component 14.

[0048] When the telescopic drive mechanism drives the shield 11 to extend downward to the working position, the iron oil-receiving structure 13 at the bottom of the shield 11 moves down together. After the shield 11 reaches the preset protective posture, the side of the oil-receiving structure 13 closest to the wall 100 is exactly in contact with the positioning magnetic suction piece 14 on the wall 100, and the two quickly form a magnetic attraction.

[0049] The magnetic attraction between the iron oil-receiving structure 13 and the positioning magnetic component 14 creates a vertical pull and a horizontal limit on the bottom of the shield 11. This effectively counteracts external forces such as stove vibration and oil fume flow impact during cooking, preventing the shield 11 from shifting, shaking, or even tipping over, and ensuring that the shielding surface always remains in a vertical and flat protective state.

[0050] In some embodiments, an annular buffer rubber ring can be embedded on the side of the oil receiving structure 13 near the wall 100. When the oil receiving structure 13 and the positioning magnetic suction member 14 are attracted and contacted, the rubber ring can buffer the impact force generated by their collision, reduce metal contact noise, and at the same time prevent hard friction between the iron end face and the adsorption surface of the positioning magnetic suction member 14, thus protecting the surface integrity of the magnetic suction member and the oil receiving structure 13. In addition, a positioning protrusion can be added to the iron end face of the oil receiving structure 13, and a positioning groove can be opened at the corresponding position of the positioning magnetic suction member 14 on the wall 100. When the two are magnetically attracted, the positioning protrusion is inserted into the positioning groove, forming a composite fixation of mechanical limiting and magnetic attraction, further improving the stability of the connection.

[0051] The iron oil-receiving structure 13 retains the core function of centrally receiving oil and preventing oil drips, while eliminating the need for an additional magnetic attachment at the bottom of the shield 11. This simplifies the overall structure of the anti-splash assembly 1, reduces the number of parts, and lowers production and assembly costs. Secondly, the magnetic attachment between the oil-receiving structure 13 and the positioning magnetic attachment 14 provides additional bottom limit for the shield 11, forming a double fixation with the support of the top drive mechanism. This significantly improves the structural stability of the shield 11 in its working position, ensuring that the protective effect remains effective even under extreme cooking conditions such as strong vibrations and strong airflows. In some embodiments, the main body of the oil receiving structure 13 may be made of lightweight rust-proof alloy material, and iron magnetic blocks may be embedded only in the area corresponding to the positioning magnetic suction component 14 on its side. This retains the magnetic attraction capability with the positioning magnetic suction component 14, while reducing the overall weight of the oil receiving structure 13, reducing the load on the telescopic drive mechanism, and extending the service life of the drive components.

[0052] In some embodiments, a permanent magnet may be added inside the iron oil-receiving structure 13, so that the oil-receiving structure 13 itself has magnetism and forms a cooperative form of opposite pole attraction with the positioning magnetic suction component 14 on the wall 100, thereby enhancing the magnetic attraction force.

[0053] exist Figure 2 In the embodiment shown, on the mounting wall 100 where the range hood is located, two positioning magnetic suction pieces 14 are arranged symmetrically at the bottom area corresponding to the working position of the shield 11. The distance between the two positioning magnetic suction pieces 14 is adapted to the width of the iron oil receiving structure 13. The two work together to form a multi-point magnetic attraction with the oil receiving structure 13, further improving the fixation stability and force uniformity of the shield 11 in the working position.

[0054] Compared to single-point magnetic attraction, dual-point magnetic attraction provides a more balanced limiting force to the bottom of the shield 11, effectively dispersing external impacts and preventing the shield 11 from tilting or deforming due to unilateral force. This significantly improves the structural stability of the shield 11 in its working position and ensures the integrity of the splash protection. In addition, the two positioning magnetic attraction components 14 are symmetrically arranged and cooperate with the multi-point magnetic attraction of the oil receiving structure 13, enhancing the reliability of the overall connection. Even if one magnetic attraction component experiences a decrease in magnetic attraction performance, the other magnetic attraction component can still provide basic limiting, possessing a certain fault tolerance capability and improving the stability of the equipment.

[0055] exist Figure 4 In the illustrated embodiment, the telescopic drive mechanism includes a microcontroller, a motor 15, and a connecting rod 17. The motor 15 is a miniature geared stepper motor 15, which is electrically connected to the microcontroller and can receive forward / reverse and start / stop commands from the microcontroller to achieve precise control of the rotation angle and speed. One end of the motor 15 is connected to the connecting rod 17, and the top blocking member 11 is fixedly connected to the connecting rod 17. The motor 15 drives the connecting rod 17 to achieve the telescopic movement of the blocking member 11.

[0056] In some embodiments, the telescopic drive mechanism may not require a separate microcontroller, but may instead use the built-in controller of the range hood body 2.

[0057] exist Figure 4 In the embodiment shown, the anti-splash assembly 1 further includes a frame 12 and a bearing 16. The bearing 16 is disposed on the frame 12, and the connecting rod 17 passes through the bearing 16. The frame 12 is provided with a receiving cavity. When the shielding member 11 retracts to a predetermined position under the drive of the motor 15, the shielding member 11 is stored in the receiving cavity.

[0058] The frame 12 of the anti-splash assembly 1 is an integrated rigid frame structure, which is in the shape of a long strip groove. It is fixed to the surface of the bottom of the range hood body 2 or in the recessed mounting groove by bolt assembly. The length of the frame 12 is adapted to the width of the shield 11, and the width matches the depth of the mounting groove, so it can be completely hidden in the mounting groove without being exposed. The two side walls of the frame 12 are symmetrically provided with bearing 16 mounting holes. The bearing 16 is a wear-resistant self-lubricating bearing. Its outer ring is fixed with the mounting hole of the bearing 16 by interference fit. The inner ring is a smooth through hole structure. The connecting rod 17 of the anti-splash assembly 1 passes through the inner ring of the bearing 16. The connecting rod 17 and the inner ring of the bearing 16 are clearance fitted. The bearing 16 is filled with high temperature resistant oil-proof grease, which can reduce the frictional resistance and noise when the connecting rod 17 rotates, and at the same time isolate the corrosion of kitchen fumes and moisture, and extend the service life of the transmission components. The recessed area of ​​the frame 12 forms a closed receiving cavity, the volume of which is adapted to the volume of the shield 11 in the retracted state. A flexible cushioning layer made of high-temperature resistant silicone is attached to the inner side of the cavity wall to prevent the shield 11 from hard collision with the cavity wall during storage and thus avoid wear. The storage cavity 121 of the frame 12 also has a motor 15 mounting base, and the motor 15 is fixed on the mounting base. The output shaft of the motor 15 is rigidly connected to one end of the connecting rod 17.

[0059] When the range hood receives a start signal, the microcontroller drives the motor 15 to rotate forward. The output shaft of the motor 15 drives the connecting rod 17 to swing around the inner ring of the bearing 16. The connecting rod 17 causes the shielding part 11 to move downward in the vertical direction. At this time, the shielding part 11 gradually detaches from the receiving cavity of the frame 12 and unfolds into a vertical shielding surface, similar to unfolding a scroll. After the shielding part 11 reaches the working position, the motor 15 stops rotating and self-locks. With the magnetic attraction of the wall 100 positioning magnetic suction part 14 and the iron oil receiving structure 13, the shielding part 11 is stably unfolded. When the range hood receives a turn-off signal, the motor 15 rotates in the reverse direction, causing the connecting rod 17 to swing in the reverse direction and pull the shielding part 11 upward. During the movement, the shielding part 11 gradually curls onto the connecting rod 17 and is finally completely stored in the receiving cavity of the frame 12. At this time, the receiving cavity of the frame 12 can form all-round protection for the shielding part 11, preventing it from being exposed to the outside for a long time to accumulate dust, oil, or be hit by external forces.

[0060] The frame 12 provides a stable installation and support base for the anti-splash oil assembly 1. The bearing 16 significantly reduces the frictional resistance during the transmission process of the connecting rod 17, making the extension and retraction of the shield 11 more stable and smooth. The self-lubricating and oil-proof design can ensure the long-term stable operation of the transmission link in the high-temperature oil fume environment of the kitchen, reducing the failure rate. In addition, the housing cavity of the frame 12 can be completely stored when the shield 11 is not in operation, which not only prevents the shield 11 from being exposed and accumulating dust and oil, but also does not occupy extra kitchen space, maintaining the overall aesthetics and cleanliness of the range hood.

[0061] In some embodiments, the anti-splash assembly 1 further includes a position sensor and a pressure sensor. The position sensor is used to detect whether the shield 11 retracts to a predetermined position, and the pressure sensor is used to detect the pressure on the shield 11 during the retraction process.

[0062] Specifically, a position sensor is embedded at the top of the inner wall of the cavity containing the skeleton 12. This position sensor is a non-contact infrared position sensor, with its detection probe facing inwards from the cavity and its installation position corresponding to the top area of ​​the shield 11 when it is fully retracted. The signal output terminal of the position sensor is electrically connected to the microcontroller via a shielded cable, providing real-time feedback of the position signal of the shield 11 to the microcontroller. Simultaneously, a pressure sensor is integrated at the hinge position between the connecting rod 17 and the top of the shield 11. This pressure sensor is a miniature thin-film pressure sensor that can monitor pressure changes in the shield 11 in real time. The pressure sensor is also connected to the microcontroller via a shielded cable, and its surface is covered with a high-temperature resistant, oil-proof sealing sleeve to isolate it from the corrosive effects of high-temperature oil fumes and moisture in the kitchen, ensuring detection accuracy and service life.

[0063] When the range hood receives a shutdown signal, the microcontroller drives the motor 15 to rotate in the opposite direction, causing the connecting rod 17 to retract the baffle upwards. As the baffle 11 gradually retracts into the cavity of the frame 12, the position sensor continuously emits infrared detection signals. When the baffle 11 is fully retracted to the predetermined position, the top of the baffle 11 will enter the detection range of the position sensor. The sensor immediately sends a trigger signal to the microcontroller indicating that the baffle 11 has been retracted to the correct position. Upon receiving the signal, the microcontroller immediately controls the motor 15 to stop rotating and initiates a self-locking mechanism, completing the retraction of the baffle 11. Throughout the retraction process of the baffle 11, the pressure sensor continuously monitors the pressure value of the baffle 11 and transmits the real-time pressure data to the microcontroller. If the baffle 11 accidentally touches an obstacle during the retraction process, the pressure detected by the pressure sensor will momentarily exceed the preset threshold. At this time, the microcontroller can receive the over-limit signal from the pressure sensor within milliseconds, immediately drive the motor 15 to stop rotating, and wait for the pressure to return to a safe range before deciding whether to continue retraction based on user instructions.

[0064] In some embodiments, the anti-splash assembly 1 further includes an angle sensor to detect the rotation angle of the connecting rod 17.

[0065] like Figures 1 to 5 As shown, this embodiment of the invention also provides a control method for a range hood, including: S10. In response to the start signal of the range hood, control the telescopic drive mechanism to extend the shield 11 downward to the working position. The working position is user-defined or factory default setting.

[0066] When a user triggers the start signal of the range hood (including pressing the start / stop button on the unit, sending a remote control command, or sensing the ignition signal of the cooktop), the main control circuit of the range hood first starts the fan system to enter the fume extraction state, and simultaneously transmits the start signal to the microcontroller. After receiving the start signal, the microcontroller immediately retrieves the pre-stored working position parameters of the shield 11 and sends a forward rotation command to the motor 15 of the telescopic drive mechanism. After receiving the command, the motor 15 drives the connecting rod 17 to move, causing the shield 11 to extend downward in the vertical direction. During this process, the microcontroller can collect the rotation angle of the connecting rod 17 in real time through the angle sensor, and calculate the extension stroke of the shield 11. When the extension stroke of the shield 11 reaches the preset working position parameter, the microcontroller sends a stop command to the motor 15. The motor 15 stops rotating and self-locks. At this time, the shield 11 is fully extended into a vertical shielding surface, and the iron oil-collecting structure 13 at its bottom forms a magnetic attraction with the positioning magnetic suction part 14 on the wall 100, realizing the stable positioning of the shield 11 in the working position and completing the activation of the anti-splashing protection. The working position of the shield 11 can be customized by the user through the control panel of the range hood or the matching terminal. The user can adjust the extension height of the shield 11 according to different cooking scenarios (such as high-temperature stir-frying, light cooking). The microcontroller will automatically store the user-set parameters and call them first. If the user does not make a custom setting, the microcontroller will call the factory preset working position parameters by default to ensure the basic protection effect.

[0067] S20. In response to the shutdown signal of the range hood, control the telescopic drive mechanism to operate so as to retract the shield 11 upward to a predetermined position.

[0068] When a user triggers the shutdown signal of the range hood (including pressing the stop button, remotely sending a shutdown command, or triggering the induction cooktop with a flameout signal), the main control circuit of the range hood first controls the fan system to enter a delayed suction state (to remove residual fumes), and at the same time transmits the shutdown signal to the microcontroller. After receiving the signal, the microcontroller sends a reverse rotation command to the motor 15 of the telescopic drive mechanism. The motor 15 drives the connecting rod 17 to move in the opposite direction, causing it to retract upwards. When the position sensor detects that the blocking part 11 has completely retracted to the predetermined position, it sends a position signal to the microcontroller. The microcontroller then commands the motor 15 to stop rotating and self-lock, completing the retraction of the blocking part 11. After the fan finishes its delayed suction, the range hood enters the shutdown state.

[0069] For S10 and S20, the automatic control of the extension and retraction of the shield 11 is achieved through linkage with the start and stop signal of the range hood, eliminating the need for manual operation by the user and greatly improving the ease of use of the equipment. This ensures that the anti-splash protection and oil fume extraction start and retract simultaneously, avoiding the failure of 100% oil stain protection on the wall due to human error. Secondly, the working position supports both user-defined and factory default modes, which can adapt to the protection needs of different cooking scenarios, taking into account both personalized and basic protection effects, and improving the adaptability of the solution.

[0070] like Figure 6 As shown, in some embodiments, the control method for the range hood further includes: S30. During the upward retraction of the blocking member 11, the pressure on the blocking member 11 is detected.

[0071] When the microcontroller responds to the range hood shutdown signal and executes step S20, driving the telescopic drive mechanism to retract the shield 11 upwards, the pressure sensor is simultaneously triggered to enter the working state. The pressure sensor detects the pressure on the shield 11 in real time at a preset sampling frequency and feeds back the collected pressure data to the microcontroller in real time through the shielded signal link. The microcontroller continuously compares the real-time pressure data with the pre-stored pressure safety preset value to provide a basis for subsequent protective actions.

[0072] S40. When the pressure on the blocking member 11 is greater than the preset value, the blocking member 11 stops retracting upward.

[0073] If the obstruction 11 touches an obstacle such as the user's hand, kitchen cabinet, or stove accessories during the retraction process, the pressure will increase sharply. When the microcontroller determines that the real-time pressure data is greater than the preset pressure safety value, it will immediately send a stop command to the motor 15 of the telescopic drive mechanism. The motor 15 will stop rotating within a millisecond response time, terminating the upward retraction of the obstruction 11 and preventing the pressure from continuing to increase, which could cause injury to the user or deformation and damage to components such as the obstruction 11 and the connecting rod 17.

[0074] To further enhance safety, the microcontroller will automatically trigger a reverse avoidance action after the drive motor 15 stops. This means controlling the motor 15 to rotate slightly in the forward direction, causing the blocking component 11 to extend downwards by a preset stroke to release the pressure from the obstacle. Once the pressure sensor detects that the pressure has fallen below the safety threshold, the microcontroller will pause the action and send a prompt signal to the user. The user can confirm that the obstacle has been cleared through the range hood control panel and then manually trigger the blocking component 11 to continue retracting. If no user instruction is received, the microcontroller will automatically lock the telescopic drive mechanism after a preset time to prevent secondary risks caused by misoperation.

[0075] For the S30 and S40, real-time pressure detection significantly improves the safety and reliability of the equipment, making them especially suitable for family kitchens with elderly people and children.

[0076] like Figure 7 As shown, in some embodiments, the control method for the range hood further includes: S50, Record the number of times the blocking component 11 extends and retracts.

[0077] After initialization, the microcontroller automatically creates a count file to record the number of extensions and retractions. Each time the range hood responds to a start signal and drives the extension mechanism to complete a full extension / retraction cycle (i.e., the entire process of the shield 11 extending downwards from the predetermined storage position to the working position and then retracting upwards from the working position back to the predetermined storage position), the microcontroller accumulates the number of extensions / retractions in the count file. To ensure counting accuracy, the microcontroller uses the position sensor signal as the counting criterion: when the position sensor detects that the shield 11 has fully extended from the storage position to the working position, it is marked as fully extended; when the position sensor detects that the shield 11 has fully retracted from the working position to the storage position, it is determined as a complete extension / retraction cycle, and the count is immediately accumulated. Furthermore, the microcontroller also identifies abnormal extension / retraction actions. If the shield 11's action is interrupted during extension or retraction due to excessive pressure, jamming, or other malfunctions, and a complete extension / retraction cycle is not completed, it is not counted in the statistics, ensuring that the count data accurately reflects the effective usage frequency of the shield 11. Meanwhile, the microcontroller allows users to view the real-time scaling count through the human-machine interface panel or a matching smart terminal, making it easy for users to keep track of the component's usage status.

[0078] S60. When the number of extensions and retractions reaches the preset number, a cleaning prompt signal is output.

[0079] The microcontroller continuously compares the real-time expansion and contraction counts in the counter file with the pre-stored cleaning threshold. When the real-time expansion and contraction counts reach or exceed the cleaning threshold, the microcontroller immediately triggers the cleaning prompt mechanism. The cleaning prompt can be displayed on the screen or given a voice prompt. For example, in practical applications, when the preset number of expansions and contractions is reached, firstly, the microcontroller sends a prompt signal to the range hood's human-machine interface panel. The cleaning prompt indicator light on the panel will become constantly lit or flashing, and simultaneously, a text prompt will pop up on the panel display, intuitively informing the user that the anti-splash component 1 needs cleaning. Secondly, if the range hood is equipped with a smart linkage function, the microcontroller can also push cleaning reminder messages to the user's linked mobile terminal, achieving multi-terminal synchronous prompts. Furthermore, after triggering the cleaning prompt, the microcontroller will pause the accumulation of expansion and contraction counts. After the user completes cleaning and resets the count via the confirmation button on the human-machine interface panel, the counter file is cleared and counting restarts. If the user does not confirm in time, the prompt signal will remain until a reset command is received. The preset cleaning threshold can be customized by the user according to the actual usage scenario. For example, for commercial kitchens with high-frequency cooking, the user can appropriately lower the threshold to increase the cleaning frequency; for home kitchens with low-frequency use, the threshold can be raised to balance cleaning needs and ease of use.

[0080] To further optimize the control logic, the microcontroller can also add a tiered prompting mechanism. This involves preset threshold ranges for the number of times the range hood can be extended or retracted. When the first threshold is reached, a mild reminder (such as a constantly lit indicator light) is triggered. When the second threshold is reached, a stronger reminder is triggered (such as flashing indicator lights and text prompts on the panel). When the third threshold is exceeded, a mandatory reminder is triggered (in addition to multi-device prompts, a pop-up reminder will appear every time the range hood is started, until cleaning and resetting are complete). This guides users to complete maintenance promptly. Simultaneously, the microcontroller can record the time and number of extensions / retractions for each cleaning cycle, creating a maintenance log for easy tracing of component maintenance history.

[0081] For S50 and S60, by accurately recording the number of complete extension and retraction cycles of the shield 11, a scientific and quantitative basis for judging the cleaning and maintenance of the anti-splash oil assembly 1 is provided, avoiding the problem of untimely or excessive cleaning due to subjective judgment, and ensuring that the assembly is always in a clean operating state. In addition, the multi-terminal synchronous cleaning reminder mechanism can effectively remind users to complete the maintenance, prevent the shield 11 from malfunctions such as extension and retraction jamming or magnetic failure due to long-term accumulation of oil, and extend the service life of the anti-splash oil assembly 1.

[0082] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention 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 the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An oil-splashing component, applied to a range hood, characterized in that, include: shielding components; A telescopic drive mechanism is used to drive the blocking member to perform vertical telescopic movement; When the shielding member extends downward to the working position, it can unfold to form a vertically set shielding surface, and the shielding surface is located on the front side of the wall where the range hood is installed.

2. The anti-splash oil assembly according to claim 1, characterized in that, The bottom of the shield is provided with an oil-collecting structure.

3. The anti-splash oil assembly according to claim 1, characterized in that, It also includes a positioning structure for fixing the shielding member when the shielding member extends to the working position.

4. The anti-splash oil assembly according to claim 3, characterized in that, The positioning structure includes a positioning magnetic component disposed on the mounting wall where the range hood is installed, and the blocking component can be attracted and engaged with the positioning magnetic component.

5. The anti-splash oil assembly according to claim 1, characterized in that, The telescopic drive mechanism includes a motor and a connecting rod. The motor is connected to the connecting rod in a transmission manner, and the blocking member is connected to the connecting rod. The connecting rod is driven by the motor to realize the telescopic movement of the blocking member.

6. The anti-splash oil assembly according to claim 5, characterized in that, It also includes a frame and a bearing, the bearing being mounted on the frame, the connecting rod passing through the bearing, the frame having a receiving cavity, and the blocking member being housed in the receiving cavity when it retracts to a predetermined position under the drive of the motor.

7. An oil splash prevention assembly according to any one of claims 1-6, characterized in that, It also includes a position sensor for detecting whether the blocking member retracts to a predetermined position.

8. An oil splash prevention assembly according to any one of claims 1-6, characterized in that, It also includes a pressure sensor for detecting the pressure exerted on the barrier during retraction.

9. A range hood, characterized in that, The range hood includes a range hood body and an anti-splash oil assembly as described in any one of claims 1-8, wherein the range hood body is mounted on a wall, and the anti-splash oil assembly is located at the bottom of the range hood body and near the edge of the wall.

10. A control method for a range hood, characterized in that, include: In response to the start signal of the range hood, the telescopic drive mechanism is controlled to operate so as to extend the shield downward to the working position, which is user-defined or factory default setting; In response to the shutdown signal of the range hood, the telescopic drive mechanism is controlled to retract the shield upward to a predetermined position.

11. The control method for a range hood according to claim 10, characterized in that, Also includes: During the upward retraction of the blocking component, the pressure on the blocking component is detected; When the pressure on the blocking component exceeds the preset value, the blocking component stops retracting upwards.

12. The control method for a range hood according to claim 10, characterized in that, Also includes: Record the number of times the obstruction extends or retracts; When the preset number of retractions is reached, a cleaning prompt signal is output.

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