Range hood

Abstract

The invention relates to a range hood which comprises an exhaust fume collecting hood; an exhaust inlet extending up and down and an air inlet plate which is arranged on the front side of the exhaust inlet and protrudes forwards relative to the front side wall of the exhaust fume collecting hood are formed in the middle area of the front side wall of the exhaust fume collecting hood in the left-right direction; two first air inlets are correspondingly defined between the left side edge and the right side edge of the air inlet plate and the front side wall of the exhaust fume collecting hood, and the two first air inlets communicate with an inner cavity of the exhaust fume collecting hood; or two first air inlets located in the left side and the right side respectively are defined in the air inlet plate, and the opening directions of the two first air inlets face the left side and the right side respectively. The range hood has the advantages of being good in oil smoke suction effect and capable of avoiding interference with cookware and blocking the sight of a user.

Description

Technical Field

[0001] This invention relates to the field of kitchen appliance technology, and in particular to an easy-to-clean range hood. Background Technology

[0002] A range hood is a kitchen appliance used to purify the kitchen environment. Due to space limitations in kitchens, a thinner range hood with a narrow front-to-back depth has emerged. For example, Chinese utility model patent CN211372530U discloses such a range hood. This range hood includes a housing and a fan system housed within the housing. The lower part of the housing has a vertically extending smoke inlet chamber, and the front side wall of the lower part of the housing has a smoke inlet communicating with the smoke inlet chamber. A baffle plate extending laterally along the smoke inlet is rotatably connected to the smoke inlet. The upper part of the housing has a smoke collection chamber communicating with the smoke inlet chamber, which extends forward to form a mounting cavity for installing the fan system. The rear wall of the range hood housing is wall-mounted. Because the smoke inlet chamber in the lower part of the housing extends vertically, its width in the front-to-back direction can be made thinner, allowing it to extend downwards close to the stove and the source of oil fumes. This ensures that oil fumes are quickly drawn into the smoke inlet chamber and exhausted upwards as soon as they are generated, improving the smoke extraction effect.

[0003] However, the aforementioned slim range hoods still have some shortcomings: To effectively collect smoke, the baffle is usually positioned very low. Especially in large panel structures, the bottom edge of the baffle typically extends to the bottom of the unit, meaning it's far below the cookware on the stovetop. This extremely low position prevents users from using taller cookware (such as steamers, pressure cookers, and deep stew pots), as the protruding parts of the cookware will directly collide and interfere with the downward-flipping baffle. This greatly limits the flexibility of the user's cooking operations, especially in scenarios requiring significant movement of the cookware, such as "tossing" the pot, or placing tall containers. Furthermore, because the baffle is located between the user and the cookware, and has a large area (especially in large panel structures), it creates a significant visual obstruction when in operation (flipped downwards). This hinders the user from clearly observing the cooking status of the food inside the cookware (such as color, broth consistency, and stir-frying effect). Users often need to bend over or turn sideways to see clearly, greatly reducing the intuitiveness and user experience of the cooking process. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a range hood that has a good oil fume extraction effect and can avoid interference with cookware and obstruction of the user's view, in light of the current state of the technology.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a range hood, comprising:

[0006] Smoke hood;

[0007] The front sidewall of the smoke hood has an air intake that extends vertically in the middle area in the left-right direction, and an air inlet plate that is arranged in front of the air intake and protrudes forward relative to the front sidewall of the smoke hood.

[0008] Two first air inlets are defined between the left and right sides of the air inlet plate and the front side wall of the smoke hood, and the two first air inlets are connected to the inner cavity of the smoke hood; or, the air inlet plate defines two first air inlets located on the left and right sides respectively, and the opening directions of the two first air inlets are facing the left and right sides respectively.

[0009] Generally, the air inlet plate can be designed to be fixed relative to the smoke collection hood, meaning it cannot be adjusted relative to the hood. However, to ensure the overall aesthetics of the range hood when it is off, an improvement includes a fan plate movement mechanism. This mechanism allows the air inlet plate to move back and forth relative to the smoke collection hood, and during this movement, it has at least two states: a first state with the air intake open and a second state with the air intake closed. When the range hood is off, the air inlet plate closes the air intake of the smoke collection hood, preventing it from protruding too far forward and maintaining a pleasing appearance. Furthermore, the fan plate movement mechanism not only allows for the opening and closing of the air intake but also enables flexible control of the air intake area based on the amount of cooking fumes.

[0010] As an improvement, in the second state, at least a portion of the air inlet plate is embedded in the air intake of the fume hood, thereby forming a complete plate structure with the front sidewall of the fume hood. After being embedded in the air intake, the air inlet plate is flush with the front sidewall, forming a smooth and complete panel, improving aesthetics. Furthermore, the absence of protruding structures on the front side of the fume hood reduces dead zones for oil and dirt accumulation, making cleaning easier for users.

[0011] In order to guide the oil accumulated on the back of the air inlet plate to the oil cup at the bottom of the smoke hood, the air inlet plate includes a main body and an oil guide plate rotatably connected to the bottom edge of the main body about a left-right extending axis. The lower edge of the oil guide plate is rotatably connected to the smoke hood. When the air inlet plate is in the first state, both the oil guide plate and the main body are tilted forward from bottom to top, and the tilt angle formed by the oil guide plate relative to the vertical direction is greater than the tilt angle formed by the main body relative to the vertical direction.

[0012] As an improvement, the bottom of the smoke hood is also provided with oil cups extending to the left and right. When the air inlet plate is in the second state, the main body is embedded in the air intake, and the oil guide plate is hidden in the inner cavity of the smoke hood and located above the oil cups. The above structural design can make reasonable use of the space above the oil cups in the smoke hood, and avoid obstruction or interference to the disassembly of the oil cups (moving forward and downward).

[0013] To simplify the structure of the air deflector mechanism and ensure coordinated movement of the air inlet deflector body and the oil guide plate, the air deflector mechanism includes:

[0014] Drive unit;

[0015] The linkage mechanism includes a first linkage assembly and a second linkage assembly. The first linkage assembly includes a first link, the first end of which is tractively connected to the drive device, thereby enabling it to deflect back and forth under the drive device. The second end of the first link is rotatably connected to the upper part of the back side of the main body. The second linkage assembly includes a second link and a third link. The first ends of the second link and the third link are both rotatably connected to the smoke hood, and their rotation axes relative to the smoke hood are on the same straight line. The second end of the second link is rotatably connected to the lower part of the back side of the main body, and the second end of the third link is rotatably connected to the bottom edge of the oil guide plate.

[0016] To facilitate connection with the linkage mechanism, the upper and lower back portions of the main plate have a first and a second arm extending rearward, respectively. The second end of the first link is rotatably connected to the first arm, and the second end of the third link is rotatably connected to the second arm. Using these arms enhances the torque transmission efficiency between the link and the plate, prevents swaying, and ensures overall motion stability.

[0017] To facilitate connection between the second link assembly and the smoke hood, the smoke hood includes a rear side plate opposite to the front side wall, and the bottom inner side of the rear side plate has a fixed support arm extending forward. The first end of the second link and the first end of the third link are both rotatably connected to the fixed support arm.

[0018] As an improvement, the top front side of the fume hood has a forward-protruding head, and the air inlet plate is generally a strip plate extending vertically. In the second state, the upper end of the air inlet plate extends to the position of the protruding head on the front side wall of the fume hood, and the lower end of the air inlet plate extends to the bottom of the front side wall of the fume hood. When the front and rear dimensions of the fume hood are relatively small (ultra-thin design requirement), the aforementioned protruding head on the top front side of the fume hood can achieve a certain smoke-collecting effect and reduce the escape of oil fumes.

[0019] In cooking conditions with a large amount of oil fumes, some oil fumes may not be able to be drawn out in time through the first air inlet and may escape. To address this, the bottom of the convex head is also provided with a second air inlet that communicates with the inner cavity of the fume hood. When the air inlet plate is in the second state, the upper end of the air inlet plate extends to the bottom of the convex head and is located in front of the second air inlet.

[0020] As an improvement, it also includes a smoke baffle and a smoke baffle movement mechanism, wherein the smoke baffle can be driven by the smoke baffle movement mechanism to open and close the second air inlet.

[0021] To improve the smoke collection effect, when the smoke baffle is in the state of opening the second air inlet, the smoke baffle is located in front of the air inlet in the first state.

[0022] To further improve the smoke collection effect and reduce the escape of oil fumes from the top of the smoke hood, the smoke baffle is tilted forward and downward from the front of the bottom wall of the convex head when the second air inlet is open.

[0023] To reduce the number of drive devices and avoid occupying too much space inside the smoke hood, the smoke plate movement mechanism and the wind plate movement mechanism are linked and share the same drive device.

[0024] To achieve linkage between the smoke plate movement mechanism and the wind plate movement mechanism, the smoke plate movement mechanism includes a rocker arm and a fourth connecting rod. The first end of the rocker arm is rotatably connected to the inside of the protruding head of the smoke collection hood, and the second end is fixedly connected to the back of the smoke baffle. The first end of the fourth connecting rod is rotatably connected to the first connecting rod at a position adjacent to the first end of the first connecting rod, and the second end of the fourth connecting rod is rotatably connected to the rocker arm at a position adjacent to the first end of the rocker arm.

[0025] As an improvement, the linkage mechanism has two sets arranged at left and right intervals, and the power output end of the drive device is connected to one of the linkage mechanisms.

[0026] As an improvement, the front sidewall of the smoke hood is inclined backward from top to bottom, and the air inlet plate in the first state is also inclined backward from top to bottom as a whole, wherein the inclination angle of the air inlet plate relative to the vertical direction is greater than the inclination angle of the front sidewall of the smoke hood relative to the vertical direction.

[0027] Further improvements include an inclination angle of less than 30° between the front sidewall of the smoke hood and the vertical direction. This structural design allows for better control of the smoke hood's thickness, maintaining a slim body, while the large inclination angle of the air inlet compensates for suction power.

[0028] Compared with existing technologies, the advantages of this invention are as follows: The range hood of this invention eliminates the traditional smoke baffle structure and replaces it with a fixed, protruding air inlet design. The air inlet is located in front of the air intake, in the middle of the left-right direction, leaving ample vertical space above the cookware in the cooking areas on both sides. Users can use tall cookware such as steamers and deep stew pots without obstruction, performing large-scale operations such as tossing and stir-frying, completely solving the problem of collision between tall containers and moving parts, and greatly expanding the compatibility of cooking scenarios. On the other hand, the air inlet is located in the middle of the left-right direction of the smoke hood, removing the visual obstruction between the user and the stove. Users can directly see the inside of the cookware without bending over or turning to the side, and observe the color of the food, the state of the soup, and the stir-frying effect in real time, significantly improving the intuitiveness and operational comfort of the cooking process, and solving the problem of obstructed vision caused by traditional large-panel smoke baffles. The air inlets on the left and right sides of the air inlet (or the side openings of the air inlet) form a negative pressure zone, effectively guiding the oil fumes that diffuse from both sides to converge and preventing escape. The lower edge of the air inlet plate can still be close to the stovetop, and the "wall-attachment effect" formed by the forward-protruding structure ensures that the fumes are captured in the early stages of their rise. The fumes enter the inner cavity of the fume hood through the side air inlet, and then enter the fan system through the air intake. The airflow path is further optimized, the path is smooth, and the suction is more concentrated. While achieving a thin structure, it also takes into account the high efficiency of fume capture. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of a range hood according to an embodiment of the present invention. The air inlet plate is in the first state, and the smoke baffle is in the open state.

[0030] Figure 2 for Figure 1 A vertical sectional perspective view of the range hood in the image, cut along the front-to-back direction;

[0031] Figure 3 for Figure 1 A vertical sectional view of the range hood in the image, cut along the front-to-back direction;

[0032] Figure 4 This is a three-dimensional structural diagram of the range hood of the present invention, showing the working state of the wind plate movement mechanism, the smoke plate movement mechanism, the air inlet plate, and the smoke baffle.

[0033] Figure 5 This is a three-dimensional structural diagram of a range hood according to an embodiment of the present invention. The air inlet plate is in the second state, and the smoke baffle is in the closed state.

[0034] Figure 6 for Figure 5 The vertical sectional view of the range hood in the image, cut along the front-to-back direction. Detailed Implementation

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0036] The specification and claims of this invention use terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," to describe various exemplary structural parts and elements of the invention. However, these terms are used herein merely for ease of explanation and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this invention can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0037] Figures 1-6 A preferred embodiment of the range hood of the present invention is shown. The range hood includes a housing and a centrifugal fan disposed within the housing. The housing generally includes a fan frame 10 and a smoke collection hood 20 disposed at the bottom of the fan frame 10, the inner cavity of the fan frame 10 communicating with the inner cavity of the smoke collection hood 20. An air inlet is provided on the front side wall 201 of the smoke collection hood 20, through which external smoke enters the smoke collection hood 20. The centrifugal fan is disposed within the fan frame 10. When the centrifugal fan operates, it generates negative pressure, and external oil fumes are drawn into the smoke collection hood 20 through the air inlet. An oil filter is also provided at the air inlet of the smoke collection hood 20 for filtering oil fumes. An oil cup 23 is provided at the bottom of the smoke collection hood 20. The oil cup 23 is an elongated strip extending laterally, used to collect oil stains flowing down from the smoke collection hood 20.

[0038] See Figure 3 In this embodiment, the front sidewall 201 of the smoke hood 20 can extend vertically or slope backward from top to bottom. The slope angle of the front sidewall 201 relative to the vertical direction is less than 30°, which helps control the thickness of the smoke hood 20 to a certain extent, maintaining a slim body. The large slope of the air inlet plate 30 compensates for the suction force. The rear sidewall 202 of the smoke hood 20 is opposite to the front sidewall 201, and extends vertically for wall mounting. The front sidewall 201 of the smoke hood 20 has a vertically extending air inlet 2010 in the middle region in the left-right direction. The top front side of the smoke hood 20 has a forward-protruding head 21, and a second air inlet 210 is located at the bottom of the head 21. The portion of the smoke hood 20 in this embodiment, excluding the head 21, can be considered the main body of the smoke hood 20. The aforementioned air intake 2010 is located on the front side wall 201 of the main body of the smoke hood 20. The upper end of the air intake 2010 extends to the position where the main body of the smoke hood 20 connects with the protruding head 21, while the lower end extends to the bottom of the main body of the smoke hood 20 (i.e., the position where the oil cup 23 is located).

[0039] An air inlet plate 30 is provided on the front side of the air intake 2010 of the fume hood 20. The air inlet plate 30 is a strip plate extending vertically, which can be moved back and forth relative to the fume hood 20 by a fan plate movement mechanism. Specifically, during the back and forth movement of the air inlet plate 30 relative to the fume hood 20, it has at least a first state of opening the air intake 2010 and a second state of closing the air intake 2010. In the off state, the air inlet plate 30 can close the air intake 2010 of the fume hood 20 to avoid excessive forward protrusion and ensure aesthetics. Of course, the back and forth movement of the air inlet plate 30 driven by the fan plate movement mechanism can not only realize the opening and closing of the air intake 2010, but also flexibly control the area of ​​the air intake according to the amount of oil fume.

[0040] To ensure sufficient cooking space on both sides, the width of the air intake plate 30 (i.e., the left and right dimensions) should not exceed one-third of the width of the smoke hood 20 (i.e., the left and right dimensions). Preferably, the width of the air intake plate 30 (i.e., the left and right dimensions) is about one-quarter of the width of the smoke hood 20 (i.e., the left and right dimensions).

[0041] In some embodiments, when the air inlet plate 30 is in its second state, at least a portion of the air inlet plate 30 is embedded in the air intake 2010 of the fume hood 20, thereby forming a complete plate structure with the front sidewall 201 of the fume hood 20. After the air inlet plate 30 is embedded in the air intake 2010, it is flush with the front sidewall 201, forming a smooth and complete panel, improving aesthetics. Furthermore, the absence of protruding structures on the front side of the fume hood 20 reduces dead corners for oil accumulation, making cleaning easier for users.

[0042] The air inlet plate 30 includes a main body 31 and an oil guide plate 32 rotatably connected to the bottom edge of the main body 31 about a left-right extending axis. Specifically, the lower edge of the main body 31 and the upper edge of the oil guide plate 32 are rotatably connected by a left-right extending pin.

[0043] See Figure 3 and Figure 4The air deflector mechanism includes a drive unit and a linkage mechanism. The drive unit can be a drive motor, which is fixed inside the smoke hood 20. The linkage mechanism includes two sets of symmetrically arranged transmission units, each set including a first linkage assembly and a second linkage assembly. The first linkage assembly includes a first linkage 41, the first end of which is connected to the output shaft of the drive motor and can be driven by the drive motor to rotate back and forth around its first end. The second end of the first linkage 41 is rotatably connected to the first support arm 311 on the upper back of the main body 31. Specifically, the smoke hood 20 has a support frame 24 extending back and forth inside. The drive motor is fixed on the support frame 24, and the first end of the first linkage 41 is also rotatably mounted on the support frame 24 and connected to the output shaft of the drive motor. The axis of relative rotation between the first linkage 41 and the support frame 24 (i.e., the smoke hood 20) and the axis of relative rotation between the first linkage 41 and the main body of the air deflector both extend in the left-right direction.

[0044] The second linkage assembly is located below the first linkage assembly, primarily adjacent to the oil guide plate 32. The second linkage assembly includes a second linkage 42 and a third linkage 43. The first end of the second linkage 42 is rotatably connected to a fixed support arm 2021 extending forward from the rear side plate 202 at the bottom of the smoke hood 20, and the second end is rotatably connected to a second support arm 312 on the lower back of the main body 31. The first end of the third linkage 43 is also rotatably connected to the aforementioned fixed support arm 2021, specifically rotating coaxially with the first end of the first linkage 41. The second end of the third linkage 43 is rotatably connected to the bottom of the back of the oil guide plate 32 (i.e., the edge of the back of the oil guide plate 32 away from the main body).

[0045] The first end of the second link 42 and the first end of the third link 43 extend in the left-right direction relative to the rotation axis of the fixed support arm 2021. The second end of the second link 42 and the second end of the third link 43 also extend in the left-right direction relative to the rotation axis of the plate body and the rotation axis of the oil guide plate 32.

[0046] With the air inlet plate 30 in its first state, the drive motor pushes the main plate 31 forward via the first connecting rod 41. The main plate 31 tilts forward 30° from bottom to top, and the oil guide plate 32 simultaneously swings forward to form a 45° tilt angle. At this time, the air intake 2010 is fully open, and the left and right side edges of the air inlet plate 30 (including the main plate 31 and the oil guide plate 32) and the front side wall 201 of the smoke hood 20 also form corresponding lateral openings (i.e., the opening direction is towards the left and right sides) of the first air inlet 300 (left air inlet and right air inlet). The back of the oil guide plate 32 and the back of the main plate 31 form a continuous oil guiding surface, which guides the oil.

[0047] When the air inlet plate 30 is in the second state, the drive motor pulls back the main body 31, so that it is embedded in the air intake 2010 and flush with the front side wall 201; while the oil guide plate 32 retracts into the inner cavity of the smoke hood 20 and is suspended horizontally (or slightly tilted) directly above the oil cup 23. The oil cup 23 can be pulled forward or sideways without being interfered with.

[0048] See Figure 1 and Figure 2 The bottom of the protruding head 21 of the smoke hood 20 is provided with a second air inlet 210 and a smoke baffle 22. The smoke baffle 22 can be driven by the smoke baffle moving mechanism to open and close the second air inlet 210. Specifically, the second air inlet 210 is located on the bottom wall of the protruding head 21 near the main body of the smoke hood 20 (that is, the area where the bottom wall of the protruding head 21 connects with the main body of the smoke hood 20). When the second air inlet 210 is open, the smoke baffle 22 moves forward a relatively long distance, specifically tilting forward and downward from the front of the bottom wall of the protruding head 21. In this state, the upper end of the main body of the air inlet plate 30 is located in front of the second air inlet 210, and the smoke baffle 22 is located in front of the air inlet plate 30 in the first state. This greatly increases the smoke collection area and allows the fumes to climb upward along the main body of the air inlet plate 30 when they rise in large quantities, and flow smoothly into the second air inlet 210 above, reducing the escape of fumes at the top.

[0049] In this embodiment, the smoke plate movement mechanism and the wind plate movement mechanism are linked and share the same drive device.

[0050] The smoke baffle movement mechanism includes a rocker arm 51 and a fourth link 52. The rocker arm 51 is generally U-shaped or C-shaped, with a relatively long and narrow arm. The first end of the rocker arm 51 is hinged in the protruding head 21 and can be rotatably connected to the aforementioned support frame 24. The second end of the rocker arm 51 is fixed to the back of the smoke baffle 22. The first end of the fourth link 52 is rotatably connected to the first link 41 near the motor end, and the second end is rotatably connected to the rocker arm 51 near its first end. When the air inlet plate 30 is moved to the first state by the drive device, the first link 41 pushes the rocker arm 51 through the fourth link 52, causing the smoke baffle 22 to flip forward synchronously to the working position and open the second air inlet 210. During this process, the smoke baffle 22 and the air inlet plate 30 move synchronously without interference. When the air inlet plate 30 retracts, the smoke baffle 22 deflects backward synchronously to close the second air inlet 210.

[0051] The rocker arm 51 and the fourth link 52 of the smoke plate movement mechanism are adapted to the left and right transmission units of the wind plate movement mechanism. They are also arranged in two sets with left and right intervals. The left and right rocker arms 51 are connected by a linkage rod 53 extending left and right to ensure that the left and right rocker arms 51 can move synchronously.

[0052] In the first state of the air inlet plate 30, the oil condensed on the back of the main plate 31 flows downward along the plate surface to the oil guide plate 32. Since the angle of inclination of the oil guide plate 32 is greater than that of the main plate 31, the oil flows faster along the lower edge of the oil guide plate 32 and flows into the oil cup 23 at the bottom of the smoke hood 20 through the collection groove. When the air inlet plate 30 is in the second state, the oil guide plate 32 is located directly above the oil cup 23, and the residual oil can drip directly into the oil cup 23.

[0053] When the smoke baffle 22 rotates, the wind vane movement mechanism of this embodiment... Figure 3 The four-bar linkage shown by the dashed line drives the air inlet plate 30 to move. To adapt to the structure of the smoke hood 20 and ensure smooth opening of the air inlet plate 30 without interfering with other components of the range hood, the rotation center of the smoke hood 20 rotatably connected to the first end of the first link 41 is denoted as point A, the rotation center of the second link 42 rotatably connected to the smoke hood 20 is denoted as point B, and the rotation centers of the first support arm 311 and the second support arm 312 on the air inlet plate 30 are denoted as points D and C respectively. The line connecting points D and C does not pass through the line connecting points A and B.

[0054] This embodiment of the range hood eliminates the traditional baffle 22 structure, replacing it with a fixed, protruding air intake 30 design. The air intake 30 is located in front of the air inlet 2010, in the middle of the left-right direction, providing ample vertical space above the cookware in the cooking areas on both sides. Users can use tall cookware such as steamers and deep stew pots without obstruction, performing large-scale operations such as tossing and stir-frying, completely solving the problem of collisions between tall containers and moving parts, and greatly expanding the compatibility of cooking scenarios. Furthermore, the air intake 30, located in the middle of the smoke collection hood 20 in the left-right direction, removes a visual obstacle between the user and the cooktop. Users can directly see inside the cookware without bending over or turning sideways, observing the color of the food, the state of the broth, and the stir-frying effect in real time, significantly improving the intuitiveness and operational comfort of the cooking process, and solving the problem of obstructed vision caused by the traditional large-panel baffle 22. The air inlets on the left and right sides of the air intake 30 (or the side openings of the air intake 30) form a negative pressure zone, effectively guiding the diffused fumes from both sides into the intake and preventing escape. The lower edge of the air inlet plate 30 can still be close to the stovetop, and the "wall-attachment effect" formed by the forward-protruding structure ensures that the fumes are captured in the early stage of rising. The fumes enter the inner cavity of the fume hood 20 through the side air inlet, and then enter the fan system through the air intake 2010. The airflow path is further optimized, the path is smooth, and the suction is more concentrated. While achieving a thin structure, it also takes into account the high efficiency of fume capture.

[0055] Based on the above embodiments, other embodiments can be obtained by replacing and improving the relevant technical features. For example, the air inlet plate 30 may only include the main body 31 (i.e., omitting the oil guide plate 32), and a corresponding oil receiving groove may be provided at the bottom of the main body 31. Alternatively, the air inlet plate 30 may also include two opposite side plates, with the first air inlet 300 formed on the two side plates. Furthermore, the driving device may directly drive the rocker arm 51 to rotate, thereby transmitting force from the rocker arm 51 to the first connecting rod 41, which in turn drives the air inlet plate 30 to move.

Claims

1. A range hood, comprising: Smoke hood (20); The feature is that: the front sidewall (201) of the smoke hood (20) has an air inlet (2010) extending vertically in the middle area in the left and right direction, and an air inlet plate (30) arranged in front of the air inlet (2010) and protruding forward relative to the front sidewall (201) of the smoke hood (20); Two first air inlets (300) are defined between the left and right sides of the air inlet plate (30) and the front side wall (201) of the smoke hood (20), and the two first air inlets (300) are connected to the inner cavity of the smoke hood (20); or, two first air inlets (300) located on the left and right sides are defined on the air inlet plate (30), and the opening directions of the two first air inlets (300) are respectively facing the left and right sides.

2. The range hood according to claim 1, characterized in that: It also includes a wind vane movement mechanism, wherein the air inlet vane (30) can be driven by the wind vane movement mechanism to move back and forth relative to the smoke hood (20), and during the process of moving back and forth relative to the smoke hood (20), it has at least a first state of opening the air inlet (2010) and a second state of closing the air inlet (2010).

3. The range hood according to claim 2, characterized in that: When the air inlet plate (30) is in the second state, at least a portion of the air inlet plate (30) is embedded in the air intake (2010) of the smoke hood (20), thereby forming a complete plate structure with the front sidewall (201) of the smoke hood (20).

4. The range hood according to claim 2, characterized in that: The air inlet plate (30) includes a main body (31) and an oil guide plate (32) rotatably connected to the bottom edge of the main body (31) about a left-right extending axis. The lower edge of the oil guide plate (32) is rotatably connected to the smoke hood (20). When the air inlet plate (30) is in the first state, the oil guide plate (32) and the main body (31) are both inclined forward from bottom to top, and the inclination angle formed by the oil guide plate (32) relative to the vertical direction is greater than the inclination angle formed by the main body (31) relative to the vertical direction.

5. The range hood according to claim 4, characterized in that: The bottom of the smoke hood (20) is also provided with an oil cup (23) extending to the left and right. When the air inlet plate (30) is in the second state, the main body (31) is embedded in the air inlet (2010), and the oil guide plate (32) is hidden in the inner cavity of the smoke hood (20) and located above the oil cup (23).

6. The range hood according to claim 4, characterized in that: The wind vane motion mechanism includes: Drive unit; The linkage mechanism includes a first linkage assembly and a second linkage assembly. The first linkage assembly includes a first link (41), the first end of which is connected to the drive device and can deflect back and forth under the drive of the drive device. The second end of the first link (41) is rotatably connected to the upper part of the back side of the main body (31). The second linkage assembly includes a second link (42) and a third link (43). The first ends of the second link (42) and the third link (43) are rotatably connected to the smoke hood (20), and their rotation axes relative to the smoke hood (20) are on the same straight line. The second end of the second link (42) is rotatably connected to the lower part of the back side of the main body (31), and the second end of the third link (43) is rotatably connected to the bottom edge of the oil guide plate (32).

7. The range hood according to claim 6, characterized in that: The upper and lower back of the main body (31) have a first arm (311) and a second arm (312) extending rearward, respectively. The second end of the first connecting rod (41) is rotatably connected to the first arm (311), and the second end of the third connecting rod (43) is rotatably connected to the second arm (312).

8. The range hood according to claim 6, characterized in that: The smoke hood (20) includes a rear side plate (202) opposite to the front side wall (201), and the inner bottom of the rear side plate (202) has a fixed support arm (2021) extending forward. The first end of the second link (42) and the first end of the third link (43) are rotatably connected to the fixed support arm (2021).

9. The range hood according to any one of claims 6 to 8, characterized in that: The front top of the smoke hood (20) has a protruding head (21) that protrudes forward. The air inlet plate (30) is generally a strip plate that extends vertically. When the air inlet plate (30) is in the second state, the upper end of the air inlet plate (30) extends to the position of the protruding head (21) on the front side wall (201) of the smoke hood (20), and the lower end of the air inlet plate (30) extends to the bottom of the front side wall (201) of the smoke hood (20).

10. The range hood according to claim 9, characterized in that: The bottom of the protruding head (21) is also provided with a second air inlet (210) that communicates with the inner cavity of the smoke hood (20). When the air inlet plate (30) is in the second state, the upper end of the air inlet plate (30) extends to the bottom of the protruding head (21) and is located in front of the second air inlet (210).

11. The range hood according to claim 10, characterized in that: It also includes a smoke baffle (22) and a smoke baffle moving mechanism, wherein the smoke baffle (22) can be driven by the smoke baffle moving mechanism to open the second air inlet (210) and close the second air inlet (210).

12. The range hood according to claim 11, characterized in that: With the smoke baffle (22) in the state where the second air inlet (210) is open, the smoke baffle (22) is located in front of the air inlet plate (30) in the first state.

13. The range hood according to claim 11, characterized in that: With the second air inlet (210) open, the smoke baffle (22) tilts forward and downward from the front of the bottom wall of the protruding head (21).

14. The range hood according to claim 11, characterized in that: The smoke plate movement mechanism and the wind plate movement mechanism are linked together and share the same drive device.

15. The range hood according to claim 14, characterized in that: The smoke plate movement mechanism includes a rocker arm (51) and a fourth connecting rod (52). The first end of the rocker arm (51) is rotatably connected to the inside of the protruding head (21) of the smoke collection hood (20), and the second end is fixedly connected to the back of the smoke baffle (22). The first end of the fourth connecting rod (52) is rotatably connected to the first connecting rod (41) at a position adjacent to the first end of the first connecting rod (41), and the second end of the fourth connecting rod (52) is rotatably connected to the rocker arm (51) at a position adjacent to the first end of the rocker arm (51).

16. The range hood according to any one of claims 6 to 8, characterized in that: The linkage mechanism has two sets arranged at left and right intervals, and the power output end of the drive device is connected to one of the linkage mechanisms.

17. The range hood according to any one of claims 2 to 8, characterized in that: The front sidewall (201) of the smoke hood (20) is inclined backward from top to bottom, and the air inlet plate (30) in the first state is also inclined backward from top to bottom as a whole. The inclination angle of the air inlet plate (30) relative to the vertical direction is greater than the inclination angle of the front sidewall (201) of the smoke hood (20) relative to the vertical direction.

18. The range hood according to claim 17, characterized in that: The inclination angle of the front sidewall (201) of the smoke hood (20) relative to the vertical direction is less than 30°.

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