A lifting type oil fume exhauster with a flip cover

Abstract

The utility model discloses a kind of lifting type range hood with flip, belong to kitchen appliance technical field.The range hood aims at solving existing lifting type range hood air inlet often open easy pollution, and be forced to frequently lift due to sealing, leading to poor user experience, component short life problem.The utility model includes: fan box, fixed box and the smoke collection box body of liftable ground and being arranged in the fixed box lifting mouth;Smoke collection box body side is equipped with air inlet, air inlet is equipped with the cover plate that can be opened and closed, cover plate is connected with independent opening and closing drive component.This technical scheme is opened and closed by opening and closing drive component independent control cover plate opening and closing, with the lift drive decoupling of smoke collection box body, so that when range hood does not work, air inlet can be reliably sealed, prevent pollution and backflow, and significantly reduce the lift times of smoke collection box body only for sealing, to improve use convenience, reduce noise and wear, prolong service life.

Description

Technical Field

[0001] This utility model relates to the field of kitchen appliance technology, and in particular to a lift-type range hood with a flip-top. Background Technology

[0002] Traditional range hoods are typically fixed in place, with a constant working distance between the air inlet and the cooktop. When cooking fumes increase dramatically or cookware is placed too high, this fixed distance can cause the fumes to diffuse during their ascent, resulting in poor fume extraction. To address this issue, lift-up range hoods have emerged on the market. These products feature a liftable fume collection box that lowers during operation to shorten the fume extraction distance and improve instantaneous fume capture efficiency; when not in use, it rises back to its original position, maintaining a clean and aesthetically pleasing kitchen space.

[0003] However, existing lift-type range hoods still have the following obvious drawbacks: The first type of problem is the long-term exposure of the air inlet. Most lift-type range hoods, for the sake of structural simplicity, have their air inlets directly open without a sealing cover. When the range hood is not in use, the lift-up smoke collection box retracts completely into the upper fixed box, and its air inlet is directly connected to the outside. This design allows dust and insects to easily enter the machine, and it cannot prevent the backflow of fumes and odors from the shared exhaust duct, seriously affecting kitchen hygiene and air quality.

[0004] The second type of problem leads to unnecessary frequent raising and lowering, sacrificing convenience and reliability. Because there is no independent air inlet sealing device, to prevent the aforementioned backflow and contamination issues, users must immediately raise the smoke collection box after use and then retract it into the fixed box for concealment. This means that every cooking operation, regardless of duration, is forced to involve a complete raising and lowering cycle. This "work done, then retract" mode brings significant drawbacks: Poor user experience: The lifting process is accompanied by motor noise, and you have to wait for the smoke collection box to descend into place before each cooking session, which adds extra noise and waiting time.

[0005] Mechanical life loss: The frequent reciprocating motion of moving parts such as drive mechanisms and guide rails accelerates wear and aging, reducing the long-term reliability of the product.

[0006] Function and action are tied together: The core function of the lifting system should be to adjust the optimal smoke capture distance, but in the existing design, it has been given the additional responsibility of sealing and shielding, which has led to the decoupling of its action from its core function and has resulted in a large number of ineffective lifting and lowering operations performed solely for shielding.

[0007] Therefore, there is an urgent need for an innovative design that can not only integrate lifting and smoking with automatic sealing, but also fundamentally decouple the two functions of lifting and sealing. This allows the lifting action to focus on smoke capture efficiency, while the independent sealing device ensures hygiene and prevents backflow, thereby reducing unnecessary frequent lifting and improving the product's convenience, reliability, and user experience. Utility Model Content

[0008] The technical problem to be solved and the technical task proposed by this utility model is to improve and refine the existing technical solutions, and to provide a lift-type range hood with a flip-top cover, so as to achieve a compact structure, independent sealing of the air inlet, and reduction of ineffective lifting. To this end, this utility model adopts the following technical solution.

[0009] A liftable range hood with a flip-top includes a fan housing, a fixed housing, and a smoke collection housing. The fan housing is equipped with a smoke exhaust assembly; The fixed housing is connected to one side of the fan housing, and its bottom is provided with a lifting port; The smoke collection box is installed through the lifting port and can be lifted and lowered relative to the fixed box by a lifting drive mechanism; The side of the smoke collection box is provided with an air inlet, and the air inlet is provided with an openable and closable cover plate; the cover plate is connected to an opening and closing drive assembly to drive the cover plate to open and close.

[0010] The lifting drive mechanism and opening / closing drive assembly control the lifting of the smoke collection box and the opening / closing of the cover, respectively, decoupling the functions of adjusting the smoke extraction distance and sealing the air inlet. Users can control the opening and closing of the cover independently without lifting the smoke collection box, offering rapid response and improved ease of use. The air inlet on the side of the smoke collection box has an independently driveable cover. When the range hood is not in operation, even if the smoke collection box is in the lowered position, the air inlet can be completely sealed by closing the cover, effectively preventing backflow of fumes and odors from the shared flue and blocking dust and insects from entering the machine, improving kitchen hygiene and air quality. Because the cover provides an independent sealing method, after use, there is no need to immediately raise and reset the smoke collection box to prevent backflow. This reduces unnecessary back-and-forth lifting cycles of the smoke collection box and its lifting drive mechanism, reducing operating noise and energy consumption, minimizing mechanical wear, extending the lifespan of core lifting components, and improving overall machine reliability.

[0011] As a preferred technical means: the opening and closing drive assembly includes an opening and closing drive mechanism and an opening and closing transmission mechanism, wherein the opening and closing drive mechanism is connected to the cover plate through the opening and closing transmission mechanism.

[0012] The opening and closing drive mechanism serves as the power source, while the opening and closing transmission mechanism is responsible for converting the output motion of the drive mechanism into the opening and closing swing required by the cover plate.

[0013] As a preferred technical means: the opening and closing transmission mechanism is a double rocker mechanism, including a driving member, a connecting rod and a driven member that are hinged in sequence; the driving member is connected to the output end of the opening and closing drive mechanism, the middle part of the driven member is hinged to the smoke collection box, and one end of the driven member is connected to the cover plate.

[0014] The double rocker mechanism is used as the transmission mechanism, which is simple in structure, has a certain motion, and is reliable in operation. By adjusting the dimensions of each rod, the opening and closing trajectory and speed of the cover plate can be optimized, ensuring that the cover plate can open and close smoothly and in place.

[0015] As a preferred technical means: the driven member is a curved plate structure, and a clearance groove is provided between the hinged part in the middle and the connecting end of the cover plate.

[0016] The driven component is designed as a curved plate structure with a clearance groove, which can effectively avoid the installation space of other components in the smoke collection box, solve the problem of motion interference, and maximize the utilization of space while ensuring the structural strength and transmission function of the driven component, making the overall layout more reasonable and compact.

[0017] As a preferred technical means: the opening and closing drive mechanism includes a motor and a reducer connected to the output end of the motor, and the output shaft of the reducer is connected to the opening and closing transmission mechanism.

[0018] Using a combination of motor and reducer as the opening and closing drive mechanism can provide stable and controllable rotational power. The reducer can reduce the output speed of the motor and increase the output torque, thereby driving the transmission mechanism and cover plate to move smoothly with appropriate power, avoiding impact, jamming or incomplete positioning caused by excessive speed or insufficient torque, and ensuring the reliability and accuracy of the cover plate opening and closing action.

[0019] As a preferred technical means: the motor housing is fixed on the reducer, and the reducer is fixed to the bottom plate of the smoke collection box by a mounting base.

[0020] This technical solution has a compact structure. After the motor and reducer are integrated, they are connected to the bottom plate of the smoke collection box through the mounting base. This effectively transmits and distributes the weight of the drive mechanism and the reaction force during operation to the bottom plate, reducing vibration and improving overall rigidity.

[0021] As a preferred technical means, the opening and closing drive assembly also includes a detection module for detecting the opening and closing of the cover plate.

[0022] The detection module can monitor the actual position of the cover plate. It provides feedback signals to the control system, enabling the system to determine the open and closed state of the cover plate, perform closed-loop control of the operation process, and protect against abnormal conditions (such as overload and jamming), significantly improving the level of automation and operational safety.

[0023] As a preferred technical means, the detection module includes a limit switch mounted on the mounting base and a moving contact mounted on the opening and closing transmission mechanism.

[0024] This technical solution employs a detection method combining a mechanical limit switch and a moving contact, which is low-cost, highly reliable, and has strong anti-interference capabilities. When the transmission mechanism moves to a specific position, the moving contact triggers the limit switch, generating a clear switching signal. The detection method is direct and accurate, and is particularly suitable for environments where there may be oil stains and humidity inside the range hood, ensuring the long-term stability of the condition detection.

[0025] As a preferred technical means: the lower part of the inner cavity of the smoke collection box is provided with an inclined smoke guide plate, and the oil collection assembly is provided below the smoke guide plate; the front side of the smoke guide plate is opposite to the air inlet, and the opening and closing drive mechanism is provided on its back side; the partition plate is provided with a through hole for the opening and closing drive mechanism to pass through and provide the opening and closing drive mechanism with a space for movement.

[0026] The inclined smoke guide plate smoothly directs the oily fumes drawn in from the air inlet towards the fan, reducing turbulence and energy loss and improving smoke extraction efficiency. Simultaneously, oil droplets condensing on the smoke guide plate slide down the slope to the oil collection assembly below, facilitating centralized cleaning and maintaining cleanliness inside the machine. The opening and closing drive mechanism is positioned on the back side of the smoke guide plate, using the plate as a physical barrier. This effectively blocks oil that condenses in the airflow and slides down the surface of the smoke guide plate during operation, preventing direct dripping, splashing, or accumulation on the opening and closing drive mechanism. This reduces the potential negative impact of oil on the reliability, electrical safety, and lifespan of the drive mechanism, and reduces maintenance requirements. The baffle plate fits snugly against the left and right sides of the smoke guide plate, forming a smoke collection channel with a regular cross-sectional shape and smooth inner wall, facilitating cleaning and maintaining an aesthetically pleasing appearance.

[0027] As a preferred technical means, the opening and closing drive mechanism and / or mounting base are provided with inclined surfaces that match the tilt angle of the smoke guide plate.

[0028] This technical solution uses shape matching to ensure the driving component fits snugly against the back of the smoke guide plate, reducing space occupation and achieving a compact structure. Furthermore, the inclined surface provides a reliable support surface and positioning reference for the tilted smoke guide plate. The smoke guide plate can lean stably against this inclined surface, improving operational reliability.

[0029] Beneficial effects: The lifting drive mechanism and the opening and closing drive assembly control the lifting of the smoke collection box and the opening and closing of the cover plate, respectively, so that the two functions of adjusting the oil fume extraction distance and sealing the air inlet are decoupled.

[0030] The air inlet on the side of the smoke collection box is equipped with an independently driveable cover. When the range hood is not working, even if the smoke collection box is in a lowered state, the air inlet can be completely sealed by closing the cover. This effectively prevents the backflow of fumes and odors from the public flue and blocks dust and insects from entering the machine, which helps improve the kitchen hygiene and air quality.

[0031] Because the cover provides an independent sealing method, after the range hood is used, there is no need to immediately raise and reset the smoke collection box to prevent backflow. This reduces unnecessary back-and-forth lifting cycles of the smoke collection box and its lifting drive mechanism, which not only reduces operating noise and energy consumption, but also helps to reduce mechanical wear, extend the service life of the core lifting components, and improve the overall reliability and ease of use of the machine. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the open state of this utility model.

[0033] Figure 2 This is a schematic diagram of the open state structure of this utility model after removing some parts.

[0034] Figure 3 This is a schematic diagram of the closed state structure of this utility model after removing some components.

[0035] Figure 4 This is a partial structural diagram of the closed state of this utility model after removing some components.

[0036] Figure 5 This is a partial structural diagram of the open state of this utility model after removing some parts.

[0037] In the diagram: 1. Fan housing; 2. Fixed housing; 3. Smoke collection housing; 301. Air inlet; 302. Panel; 303. Base plate; 304. Smoke guide plate; 305. Partition plate; 4. Cover plate; 5. Opening and closing drive assembly; 501. Prime moving part; 502. Connecting rod; 503. Driven part; 504. Clearance groove; 505. Motor; 506. Reducer; 507. Mounting base; 508. Limit switch; 509. Moving contact; 6. Oil collection assembly. Detailed Implementation

[0038] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings.

[0039] In the description of this utility model, 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", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Since the embodiments disclosed in this utility model can be set in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0040] Example 1: like Figure 1 As shown, this embodiment provides a liftable range hood with a flip-top, including a fan housing 1, a fixed housing 2, and a smoke collection housing 3.

[0041] The fan housing 1 is equipped with conventional smoke exhaust components (not shown in the figure), such as a volute, impeller and motor, to generate negative pressure and exhaust oil fumes.

[0042] The fixed housing 2 is connected to the rear side of the fan housing 1 (it can also be located on the left or right side depending on the installation requirements). A lifting port is opened at the bottom of the fixed housing 2.

[0043] The smoke collection box 3 is inserted into this lifting opening, and a lifting drive mechanism (not shown in the figure) is connected to its top or side. The lifting drive mechanism can be a conventional linear drive such as a motor-driven lead screw and nut pair, a gear and rack pair, or a synchronous belt drive, and its fixed part is installed inside the fixed box 2. Through the operation of the lifting drive mechanism, the smoke collection box 3 can be driven to move up and down relative to the fixed box 2, thereby adjusting the distance between its lower end surface and the stove.

[0044] An air inlet 301 is provided on the side (front side) of the smoke collection box 3 facing the stove. An openable and closable cover 4 is provided at the air inlet 301. The shape of the cover 4 is adapted to the air inlet 301 and is used to seal the air inlet 301 when closed.

[0045] To achieve automatic opening and closing of the cover plate 4, this invention includes an opening and closing drive assembly 5. The cover plate 4 is connected to the output end of the opening and closing drive assembly 5.

[0046] Specifically, in combination Figures 2-5 As shown, the opening / closing drive assembly 5 includes an opening / closing drive mechanism and an opening / closing transmission mechanism. The opening / closing drive mechanism is connected to the cover plate 4 through the opening / closing transmission mechanism.

[0047] More specifically, in this embodiment, the opening and closing transmission mechanism is a double rocker mechanism. This double rocker mechanism includes a driving member 501, a connecting rod 502, and a driven member 503, which are hinged sequentially. One end of the driving member 501 is connected to the output end of the opening and closing drive mechanism. The middle part of the driven member 503 is hinged to the inner wall of the smoke collection box 3 via a hinge seat, thereby forming a swing fulcrum. One end of the driven member 503 (i.e., the end away from the connecting rod 502) is fixedly connected to the back of the cover plate 4 by screws or the like.

[0048] As a preferred compact design, the follower 503 is a bent metal plate, which can be formed by stamping, with the bend adopting an arc-shaped structure. A clearance groove 504 is provided between the central hinge point (where it connects to the hinge seat) of the follower 503 and its connection end with the cover plate 4. This clearance groove 504 is used to avoid the panel 302 of the smoke collection box 3 during movement, preventing interference; in the closed state, the panel 302 is located above the cover plate 4.

[0049] The opening and closing drive mechanism specifically includes a motor 505 and a reducer 506 connected to the output end of the motor 505. The output shaft of the reducer 506 is fixedly connected to the prime mover 501. The housing of the motor 505 is usually fixed to the housing of the reducer 506, and the two form an integrated module. This module is fixed to the base plate 303 of the smoke collection box 3 by a mounting base 507. The mounting base 507 can be connected to the base plate 303 by screws, and the reducer 506 is fixed to the mounting base 507 by bolts. The drive mechanism can be a worm gear reducer 506 with a self-locking function, etc.

[0050] To simplify the structure, the opening and closing drive assembly 5 can also adopt a direct-drive structure using a linear motor 505, combining the opening and closing drive mechanism with the opening and closing transmission mechanism into one. A waterproof and oil-proof linear motor is selected, with its stator fixed on the smoke collection box 3 and its mover (push rod) output end directly hinged to the back of the cover plate 4. By controlling the extension and retraction of the linear motor, the cover plate 4 is directly driven to open and close.

[0051] To automatically detect whether the cover 4 is in the open state, the opening and closing drive assembly 5 also includes a detection module. As shown in the figure, the detection module includes a limit switch 508 fixedly mounted on the mounting base 507 and a moving contact 509 (or trigger protrusion) mounted on the driving member 501. When the driving member 501 rotates with the motor 505 to the position where the corresponding cover 4 is fully open or fully closed, the moving contact 509 will trigger the limit switch 508, and the switch signal will be sent to the control system, thereby controlling the motor 505 to stop running. The use of the limit switch 508 is only a preferred embodiment of this utility model, which is a contact-type detection; it is understood that a non-contact detection module can also be used, such as a non-contact proximity switch (such as inductive or capacitive type) fixed on the mounting base 507, and a metal trigger piece fixed at the corresponding position on the driving member 501. When the cover 4 moves to the detection position, the metal trigger piece enters the sensing area of ​​the proximity switch, causing a change in its output signal. For example, the detection module uses a Hall sensor fixed on the mounting base 507, and a small magnet is installed on the output shaft of the prime mover 501 or the reducer 506. When the cover plate 4 drives the prime mover 501 to rotate to a specific angle, the magnet passes through the Hall sensor, causing it to output a high or low level signal. The detection module can also use photoelectric switch detection methods, etc., which will not be elaborated here.

[0052] To optimize airflow and oil path within the smoke collection box 3, an inclined smoke guide plate 304 is installed at the lower part of the inner cavity of the smoke collection box 3. The front side of the smoke guide plate 304 is opposite to the air inlet 301, and is used to guide the inhaled oil fumes to flow smoothly upwards towards the fan housing 1. An oil collection assembly 6 (such as an oil cup or oil trough) is provided below the smoke guide plate 304. The opening and closing drive mechanism and its mounting base 507 are arranged on the back side of the smoke guide plate 304, and the smoke guide plate 304 itself serves as a barrier to prevent oil droplets from splashing onto the drive mechanism.

[0053] To further optimize space utilization and improve structural stability, the mounting base 507 (and / or the bottom of the housing of the reducer 506) is provided with an inclined surface that matches the tilt angle of the smoke guide plate 304, allowing the smoke guide plate 304 to fit snugly against the mounting base 507, etc. This not only saves space but also provides additional support for the smoke guide plate 304.

[0054] like Figure 5As shown, in order to obtain a relatively enclosed smoke collection channel, a vertical partition 305 is set between the opening and closing transmission mechanism and the smoke guide plate 304, with through holes for moving parts such as the prime mover 501 to pass through. The partition 305 fits against the left and right sides of the smoke guide plate 304, so that the opening and closing transmission mechanism and other components located in the smoke collection box are hidden inside. Oil stains are confined to the side of the smoke guide plate 304 facing the air inlet and inside the smoke collection channel, which is convenient for cleaning. When the user looks inward from the front air inlet 301, all they can see is the simple and neat inner wall of the smoke collection channel formed by the smoke guide plate 304 and the partition 305, which is clean and beautiful.

[0055] Control and Workflow: When the smoke collection box 3 is fully raised and reset, its side air inlet 301 and cover plate 4 are both surrounded by the inner wall of the fixed box 2 (see...). Figure 3 , Figure 4 (In its retracted state). Therefore, the opening and closing of the cover 4 can only be performed after the smoke collection box 3 has descended from the fixed box 2 to a sufficient height and its side air inlet 301 area has completely escaped the constraint of the fixed box 2. Conversely, the cover 4 must be completely closed before the smoke collection box 3 rises back to its original position.

[0056] The control system operates based on this logic: A. Start-up process (range hood starts working): Step 1 (Lowering the smoke collection box 3): The control system first starts the lifting drive mechanism to drive the smoke collection box 3 to move downward from the fixed box 2 until it is lowered to the preset appropriate working height (at this time, the air inlet 301 and the cover plate 4 are completely exposed outside the fixed box 2).

[0057] Step 2 (Opening Cover 4): After confirming that the smoke collection box 3 is in position, the control system activates the opening and closing drive mechanism to open the cover 4 from the air inlet 301 through the opening and closing transmission mechanism. Here, "in position" does not only mean that the smoke collection box 3 has reached its final working position, but also that it has descended to a position where the cover 4 can be opened.

[0058] Step 3 (Starting the fan): After the signal of the cover 4 being fully opened is fed back by the detection module, the smoke exhaust component in the fan housing 1 is started and smoke begins to be drawn.

[0059] The specific opening process of cover 4 is as follows: The control system first controls the opening and closing drive mechanism (motor 505) to rotate forward, opening cover 4 through the double rocker mechanism (driving element 501, connecting rod 502, driven element 503). When the limit switch 508 detects the fully open signal of cover 4, motor 505 stops. Subsequently or simultaneously, the lifting drive mechanism operates, lowering the smoke collection box 3 to a suitable height, and at the same time, the fan starts to begin smoke extraction. The open state of cover 4 is as follows: Figure 2 , Figure 5 As shown, the off state is as follows Figure 3 , Figure 4 As shown.

[0060] B. Shutdown process (range hood stops working): Step 1 (Shutting down the fan): After the user turns off the range hood, the smoke exhaust components will stop working first.

[0061] Step 2 (closing cover 4): The control system starts the opening and closing drive mechanism to reverse, driving cover 4 to close until the air inlet 301 is completely sealed.

[0062] Step 3 (raising the smoke collection box 3): After the detection module confirms that the cover 4 is closed in place, the control system starts the lifting drive mechanism to raise the smoke collection box 3 and completely retract it into the fixed box 2.

[0063] C. Standby / Intermittent Cooking During cooking breaks, only the cover 4 and the fan can be closed, while keeping the smoke collection box 3 in a low position. The next time you start the machine, simply open the cover and turn on the fan; there's no need for repeated lifting and lowering, thus reducing wear and noise, improving response speed and ease of use, and minimizing unnecessary power consumption of the lifting motor.

[0064] Example 2 In this embodiment, the main difference from Embodiment 1 lies in the form of the opening and closing transmission mechanism. For example, the opening and closing transmission mechanism can employ other mechanisms capable of converting rotational motion into oscillating or linear motion, such as a rack and pinion mechanism, a worm gear mechanism, or a four-bar linkage, to achieve the opening and closing of the cover plate 4. Its installation, arrangement, and cooperation with the detection module and the smoke guide plate 304 are similar to those in Embodiment 1, and it can also achieve the automatic flip-top function within a compact space. Due to the change in the transmission mechanism, the position of the triggering component of the detection module may need to be adjusted accordingly, but this is easily achieved by those skilled in the art.

[0065] The above are specific embodiments of this utility model, which demonstrate the substantial features and progress of this utility model. Based on actual usage needs, equivalent modifications in shape, structure, etc., can be made to this utility model, and all such modifications are within the scope of protection of this solution.

Claims

1. A lift-type range hood with a flip-top, characterized in that: Includes the fan housing, the fixed housing, and the smoke collection housing; The fan housing is equipped with a smoke exhaust assembly; The fixed housing is connected to one side of the fan housing, and its bottom is provided with a lifting port; The smoke collection box is installed through the lifting port and can be lifted and lowered relative to the fixed box by a lifting drive mechanism; The side of the smoke collection box is provided with an air inlet, and the air inlet is provided with an openable and closable cover plate; the cover plate is connected to an opening and closing drive assembly to drive the cover plate to open and close.

2. A lift-type range hood with a flip-top as described in claim 1, characterized in that: The opening and closing drive assembly includes an opening and closing drive mechanism and an opening and closing transmission mechanism, wherein the opening and closing drive mechanism is connected to the cover plate through the opening and closing transmission mechanism.

3. A lift-type range hood with a flip-top as described in claim 2, characterized in that: The opening and closing transmission mechanism is a double rocker mechanism, including a driving member, a connecting rod and a driven member that are hinged in sequence; the driving member is connected to the output end of the opening and closing drive mechanism, the middle part of the driven member is hinged to the smoke collection box, and one end of the driven member is connected to the cover plate.

4. A lift-type range hood with a flip-top as described in claim 3, characterized in that: The driven member is a curved plate structure, and a clearance groove is provided between the hinged part in the middle and the connecting end of the cover plate.

5. A lift-type range hood with a flip-top as described in claim 2, characterized in that: The opening and closing drive mechanism includes a motor and a reducer connected to the output end of the motor. The output shaft of the reducer is connected to the opening and closing transmission mechanism.

6. A lift-type range hood with a flip-top as described in claim 5, characterized in that: The motor housing is fixed to the reducer, and the reducer is fixed to the bottom plate of the smoke collection box by a mounting base.

7. A lift-type range hood with a flip-top as described in claim 6, characterized in that: The opening and closing drive assembly also includes a detection module for detecting the opening and closing of the cover plate.

8. A lift-type range hood with a flip-top as described in claim 7, characterized in that: The detection module includes a limit switch mounted on the mounting base and a moving contact mounted on the opening and closing transmission mechanism.

9. A lift-type range hood with a flip-top as described in claim 6, characterized in that: The lower part of the smoke collection box is provided with an inclined smoke guide plate, and an oil collection assembly is provided below the smoke guide plate; the front side of the smoke guide plate is opposite to the air inlet, and the opening and closing drive mechanism is provided on its back side; vertical partitions are provided on both sides of the smoke guide plate, and through holes are provided on the partitions for the opening and closing drive mechanism to pass through and provide movement space.

10. A lift-type range hood with a flip-top as described in claim 9, characterized in that: The opening and closing drive mechanism and / or mounting base are provided with inclined surfaces that match the tilt angle of the smoke guide plate.

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