Range hood

Abstract

The range hood comprises an upper box body assembly, a lower box body assembly and a lower box body assembly, the air inlet body can move relative to the upper box body assembly and has a first state and a second state, and the air inlet body can be in the state that at least part of the air inlet body is lower than the bottom of the upper box body assembly and exposed out of the upper box body assembly; the oil cup is arranged at the bottom of the rear side of the air inlet body; the movement mechanism comprises a driving mechanism for driving the air inlet body to move; the movement mechanism further comprises a transmission mechanism, the transmission mechanism comprises a transmission rod, one end of the transmission rod is fixed to the oil cup, the other end of the transmission rod is connected with the upper box assembly in an up-and-down sliding mode, and the transmission rod is further rotationally connected with the air inlet body so that the oil cup can be kept in the up-and-down direction.

Description

Technical Field

[0001] The invention relates to an oil fume purification device, in particular to a range hood. Background Art

[0002] Range hoods have become an indispensable kitchen appliance in modern homes. They operate based on the principles of fluid dynamics, using a fan system installed inside the hood to draw in and exhaust cooking fumes, while a filter removes some grease particles. The fan system is typically a centrifugal fan, consisting of a volute, an impeller mounted within the volute, and a motor that drives the impeller. As the impeller rotates, negative pressure is generated at the fan's center, drawing cooking fumes from beneath the hood into the fan. After being accelerated by the fan, the volute collects them and directs them out of the room.

[0003] Traditional range hoods with smoke shields, such as side-suction range hoods, have a slanted, wall-mounted design when the hood is turned off. When the smoke shield opens, the air intake housing remains stationary, failing to balance aesthetics when the hood is off and smoke extraction efficiency when powered on. Some models also enclose the air intake housing, resulting in a concave lower surface when the hood is turned off, making it difficult to clean and maintain.

[0004] To this end, range hoods that achieve a flat appearance when turned off while ensuring effective fume extraction are now available. For example, the range hoods disclosed in Chinese patent application numbers 202322823659.4 or 202410266009.0 by the applicant are known. However, due to the overall lifting of the air inlet, these range hoods occupy a large space during operation, creating a sense of oppression.

[0005] In addition, there are also some solutions that achieve shutdown by flipping the air inlet body to achieve a flat appearance while ensuring the effect of extracting oil smoke, such as a hidden range hood disclosed in Chinese patent application number 202310591483.6, which includes a range hood main body, a flip shell, a smoke collecting plate and an oil cup assembly. The bottom of the range hood main body has an opening, and the flip shell rotates with the range hood main body to make the flip shell flip into or out of the opening. A flue is formed between the flip shell and the range hood main body, and the flip shell has a smoking port connected to the flue. The smoke collecting plate is movably connected to the flip shell to cover the smoking port or release the smoking port and gather the smoke to the bottom of the smoking port. The oil cup assembly is installed on the flip shell, and the oil cup assembly is located at the end of the flip shell that is away from the rotational cooperation of the range hood main body.

[0006] In the above-mentioned range hood, the air inlet body is flipped to switch between the closed and open working states. The air inlet body cannot be kept against the wall, and there is a gap between the air inlet body and the wall, which affects the oil fume extraction effect. In addition, the oil cup flips with the air inlet body, and there is a risk of oil spilling during the flipping process. Summary of the Invention

[0007] The first technical problem to be solved by the present invention is to provide a range hood in response to the deficiencies in the above-mentioned prior art, which can achieve a flat screen when turned off and a good fume extraction effect when turned on, while also enabling the oil cup to be stably raised and lowered.

[0008] The second technical problem to be solved by the present invention is to provide a range hood in response to the deficiencies in the above-mentioned prior art, which can ensure that the air inlet is close to the wall and further improve the oil fume extraction effect.

[0009] The technical solution adopted by the present invention to solve the first technical problem is: a range hood comprising:

[0010] Upper box assembly;

[0011] An air inlet body capable of moving relative to the upper box assembly and having a first state and a second state, wherein the air inlet body can be in a state where at least a portion of the air inlet body is lower than the bottom of the upper box assembly and exposed from the upper box assembly;

[0012] An oil cup is provided at the rear bottom of the air inlet body; and

[0013] A motion mechanism, comprising a driving mechanism for driving the air inlet body to move;

[0014] Its characteristics are:

[0015] The motion mechanism also includes a transmission mechanism, which includes a transmission rod, one end of which is fixed to the oil cup, and the other end of which is connected to the upper box assembly for sliding up and down. The transmission rod is also rotatably connected to the air inlet body so that the oil cup remains in an up and down direction.

[0016] Through the setting of the transmission rod in the transmission mechanism, it rotates around the rotating connection with the air inlet body while also slidingly cooperating with the upper box assembly to maintain its posture, so that the oil cup is always in an up and down direction while moving with the air inlet body, thereby ensuring the oil storage capacity of the oil cup.

[0017] Furthermore, in order to facilitate the sliding fit between the upper box assembly and the transmission rod, the upper box assembly includes a slide rail, and a slider is provided at the end of the transmission rod, and the slider is slidably fitted with the slide rail.

[0018] The technical solution adopted by the present invention to solve the above-mentioned second technical problem is: the front end of the air inlet body is directly or indirectly connected to the upper box assembly for rotation and the center of the rotation connection is recorded as the first rotation connection point, and the first rotation connection point can rotate around a center point located in the upper box assembly.

[0019] The air inlet body is connected to the upper box assembly through a rotating connection point, and the rotating connection point can rotate around a center point relative to the upper box assembly, so that the air inlet body can rotate non-fixed axis relative to the upper box assembly, and the motion trajectory is diversified, which can be beneficial for being set to remain close to the wall when moving downward to open, and the irregular motion trajectory of non-fixed axis rotation can be utilized when closing for storage, thereby relatively reducing the occupied space.

[0020] Furthermore, to facilitate the rotation of the first rotating connection point, the range hood also includes a rod, one end of which is rotatably connected to the upper box assembly and the center of the rotating connection coincides with the center point, which serves as the second rotating connection point.

[0021] Furthermore, the range hood further comprises a smoke baffle which is rotatable relative to the upper box assembly, and the smoke baffle is directly or indirectly fixed to the rod.

[0022] By setting the above-mentioned rods, the air inlet body and the smoke shield can move relative to the upper box assembly. The rods can facilitate high-precision control. Only by connecting the rods, a power source can be used to achieve the linkage of the air inlet body and the smoke shield and high-precision control of the motion trajectory. It is particularly suitable for use in scenarios where the motion trajectory of the air inlet body is irregular. It has a simple structure and low cost.

[0023] Furthermore, a third rotation connection point is provided on the upper box assembly, and at least two connecting rods are connected between the rod and the third rotation connection point in an end-to-end rotational connection, and one of the connecting rods is movably connected to the air inlet body.

[0024] By setting a multi-link mechanism, the above box assembly is used as a frame and is movably connected to the air inlet body, so that the rotation of the air inlet body can be achieved.

[0025] Furthermore, the at least two connecting rods are a rocker and a first connecting rod, one end of the rocker is rotatably connected to the upper box assembly through a third rotation connection point, the first connecting rod is rotatably connected to the rocker and the center of the rotation connection is recorded as a fourth rotation connection point, the first connecting rod is rotatably connected to the rod and the center of the rotation connection is recorded as a fifth rotation connection point, and the first rotation connection point is located between the fifth rotation connection point and the second rotation connection point.

[0026] By arranging the rocker and the first connecting rod, under the cooperation of the rocker, the first connecting rod and the rod, the air inlet body and the smoke baffle can rotate in the same direction, thereby realizing opening and closing in the same direction.

[0027] Furthermore, a sixth rotation connection point is provided at the rear end of the air inlet body, and the air inlet body is rotationally connected to the rocker or the first connecting rod via the sixth rotation connection point.

[0028] By further rotating the air inlet body and the transmission mechanism, it is possible to ensure that the air inlet body has a unique degree of freedom of movement, so that the movement of the air inlet body can be controlled more accurately.

[0029] Furthermore, the air inlet body is rotationally connected to the rocker through a second connecting rod, and the center of the rotational connection is recorded as a seventh rotational connection point.

[0030] The movement amplitude of the first connecting rod is close to the movement amplitude of the air inlet body. The connecting rod is used to replace the first connecting rod to reduce the movement amplitude. In order to ensure that the movement amplitudes of the first connecting rod and the connecting rod (air inlet body) are close, and considering that the connecting rod has to bear the weight of the air inlet body, the length of the connecting rod must be close to the front and rear depth of the air inlet body. Therefore, the seventh rotation connection point is chosen to be set on the rocker.

[0031] Furthermore, in order to facilitate the connection between the air inlet body and the rod and transmission rod, a connecting rod extending along the front and rear directions of the range hood is fixed on the air inlet body, and the front end of the connecting rod is rotationally connected to the rod through a first rotation connection point, and the transmission rod is rotationally connected to the connecting rod.

[0032] Compared with the prior art, the advantages of the present invention are: through the setting of the transmission rod in the transmission mechanism, it can rotate around the rotating connection with the air inlet body while also slidingly cooperating with the upper box assembly to maintain its posture, so that the oil cup is always in an up and down orientation while moving with the air inlet body, thereby ensuring the oil storage capacity of the oil cup; the air inlet body is connected to the upper box assembly through a rotating connection point, and the rotating connection point can rotate around a center point relative to the upper box assembly, so that the air inlet body can be rotated relative to the upper box assembly in a non-fixed axis manner, and the motion trajectory is diversified, which can be advantageously set to remain close to the wall when moving downward to open, and the irregular motion trajectory of the non-fixed axis rotation can be utilized when closing and storing, thereby relatively reducing the occupied space. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the range hood in an open state according to an embodiment of the present invention;

[0034] Figure 2 is a cross-sectional view of the range hood in an open state according to an embodiment of the present invention;

[0035] Figure 3 This is a cross-sectional view of the range hood in the open state according to an embodiment of the present invention (cross-sectional view and Figure 2 parallel);

[0036] Figure 4 Schematic diagram of the transmission mechanism and slide rail of the motion mechanism of the range hood according to an embodiment of the present invention;

[0037] Figure 5 This is a schematic diagram of a range hood in a closed state according to an embodiment of the present invention;

[0038] Figure 6 This is a cross-sectional view of the range hood in a closed state according to an embodiment of the present invention. DETAILED DESCRIPTION

[0039] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the embodiments disclosed in the present invention can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0041] See also Figures 1 to 6 A range hood includes an upper box assembly 1, an air inlet body 2, a smoke baffle 3 and an oil cup 4.

[0042] The upper box assembly 1 includes an outer box 11 and a fan rack 12 connected to the outer box 11 . The lower end of the fan rack 12 may be partially located inside the outer box 11 . A fan (not shown) is disposed inside the fan rack 12 .

[0043] The upper box assembly 1 can be installed in a kitchen cabinet. Since the width of the fan frame 12 usually needs to be adapted to the width of the fan, the fan frame 12 does not need to be large. The air inlet body 2 needs to be adapted to a conventional household double burner, so it needs to be larger in width. Based on the above reasons, the upper box assembly 1 is divided into an outer box 11 and a fan frame 12. If the optimization of the air intake efficiency is not considered, an integrated upper box assembly 1 can also be used.

[0044] An air inlet 21 is formed on the front of the air inlet body 2, which is movable relative to the upper box assembly 1, thereby having a first state and a second state. When the air inlet body 2 is in the first state, at least a portion of the air inlet body 2, such as at least the front end portion, is hidden and stored in the upper box assembly 1 and is located below the fan; when the air inlet body 2 is in the second state, at least a portion of the air inlet body 2 is lower than the bottom of the upper box assembly 1 and exposed from the upper box assembly 1, and ensures that the air inlet 21 is lower than the bottom of the upper box assembly 1 and exposed from the upper box assembly 1. The "front" of the air inlet body 2 mentioned above refers to the side of the air inlet body 2 facing the user when it is in the second state.

[0045] The smoke shield 3 is installed at the bottom of the upper box assembly 1 (outer box 11), and can be in the third state and the fourth state, see Figure 1 and Figure 2 When the air inlet 2 is in the second state, the smoke baffle 3 is in the third state, and a smoke collecting cavity Q is formed between the smoke baffle 3 and the front side of the air inlet 2, so that the air inlet 21 is moved downward and the smoke collecting area is increased, thereby ensuring a better oil fume absorption effect in the working state; Figure 5 and Figure 6 When the air inlet body 2 is in the first state, the smoke shield 3 is in the fourth state. The smoke shield 3 is enclosed at the bottom of the outer box body 11. It can be in a roughly horizontal extension state and can be flush with the bottom of the outer box body 11, achieving a completely flat closed state. At the same time, the air inlet 21 of the air inlet body 2 is closed, and the overall size of the machine is reduced to a minimum.

[0046] The oil cup 4 is arranged at the rear bottom of the air inlet body 2 .

[0047] The range hood also includes a motion mechanism, which includes a drive mechanism 51 and a transmission mechanism. In this embodiment, the drive mechanism 51 is an electric push rod, which is installed in the upper housing assembly 1. Its output end is transmission-connected to the air inlet body 2, thereby driving the air inlet body 2 to move relative to the upper housing assembly 1. In this embodiment, the upper end of the drive mechanism 51 is hinged to the upper housing assembly 1, and the lower end (output end) is directly hinged to the air inlet body 2, thereby driving the air inlet body 2 to rotate relative to the upper housing assembly 1, i.e., movement along the front-to-back direction of the range hood and rotation about an axis extending along the left-to-right direction of the range hood. Preferably, the output end of the drive mechanism 51 is hinged to the rear bottom of the air inlet body 2.

[0048] The transmission mechanism controls the motion of the air inlet 2 and coordinates with the smoke deflector 3, thereby enabling the air inlet 2 and smoke deflector 3 to move in unison via a single power source (drive mechanism 51). Two transmission mechanisms are located on the left and right sides of the upper housing assembly 1. These two transmission mechanisms connect the air inlet 2, smoke deflector 3, and oil cup 4.

[0049] Each transmission mechanism includes a rod, one end of which is rotationally connected to the upper box assembly 1, and the front end of the air inlet body 2 is also rotationally connected to the rod, and the center of the rotational connection is recorded as the first rotational connection point G (a rotational connection point refers to any point on the axis of the rotational connection shaft used for rotational connection, the same below), and the center of the rotational connection between the rod and the upper box assembly 1 is recorded as the second rotational connection point D, which is the rotation center of the first rotational connection point G, that is, the first rotational connection point G can rotate around the second rotational connection point D. The rod can facilitate high-precision control. Only by connecting the rod, the linkage of the air inlet body 2 and the smoke baffle 3 and high-precision control of the motion trajectory can be achieved. It is particularly suitable for use in scenarios where the motion trajectory of the air inlet body 2 is irregular. It has a simple structure and low cost.

[0050] In order to control the movement trajectory of the air inlet body 2, a third rotation connection point A is provided on the upper box assembly 1, and each transmission mechanism also includes at least two connecting rods arranged between the third rotation connection point A and the rod, and one of the connecting rods is connected to the air inlet body 2, and multiple connecting rods are connected end to end and are connected in a rotational connection manner.

[0051] In this embodiment, the at least two connecting rods are the first connecting rod 521 and the rocker 526 (the rocker 526 is also a connecting rod). The upper housing assembly 1 serves as the frame of the entire transmission mechanism. One end of the rocker 526 is pivotally connected to the side panel 13 of the upper housing assembly 1. The side panel 13 extends in the front-to-back direction of the range hood. The center of the pivotal connection is the third pivotal connection point A, which is preferably located at the rear top of the side panel 13. The side panels 13 are adapted to the transmission mechanism and also have two. They can be independent components or integral to the outer housing 11. The side panels 13 are located on the inner sides of the left and right side walls of the outer housing 11.

[0052] The rod is preferably a crank 525, one end of which is rotatably connected to the front bottom of the upper housing assembly 1, preferably in a rotatable manner, and the other end of the crank 525 is fixed to the smoke deflector 3. By making the rod a crank 525, the smoke deflector 3 can easily bypass fixed components (which will be described in detail below, namely the decorative panel and functional module) during movement.

[0053] One end of the first connecting rod 521 is rotationally connected to the end of the rocker 526 away from the third rotational connection point A. The center of the rotational connection is denoted as the fourth rotational connection point B. The other end of the first connecting rod 521 is rotationally connected to the crank 525. The center of the rotational connection is denoted as the fifth rotational connection point C. The motion trajectory of the first connecting rod 521 preferably approximates the motion trajectory of the air inlet body 2. The first connecting rod 521 can be directly or indirectly connected to the air inlet body 2. This connection may include a fixed connection or a movable connection, such as the first connecting rod 521 being fixed to the air inlet body 2, or a connecting rod between the first connecting rod 521 and the air inlet body 2 being rotationally connected to the air inlet body 2 and slidingly connected to the first connecting rod 521. In this embodiment, the first connecting rod 521 is connected to the air inlet body 2 via the crank 525. The first rotational connection point G is located between the fifth rotational connection point C and the second rotational connection point D, and the three rotational connection points do not overlap. This ensures that the air inlet body 2 and the smoke deflector 3 rotate in the same direction. To facilitate the connection between the air inlet body 2 and the crank 525, in this embodiment, it is achieved by a connecting rod 522 fixed to the air inlet body 2. The connecting rod 522 extends along the front and rear directions of the range hood, and can preferably be fixed to the bottom of the air inlet body 2. The front end of the connecting rod 522 is rotatably connected to the crank 525, and the rear end of the connecting rod 522 is close to the rear end of the air inlet body 2. The two connecting rods 522 can extend along the outside (left and right sides) of the air inlet 21 on the inner side of the air inlet body 2 and extend out of the air inlet body 2.

[0054] To ensure a single degree of freedom for the air inlet body 2, the aforementioned second connecting rod 523 is disposed between the air inlet body 2 and the rocker 526. One end of the second connecting rod 523 is pivotally connected to the air inlet body 2, with the center of this pivotal connection being designated as the sixth pivotal connection point F. The other end of the second connecting rod 523 is pivotally connected to the rocker 526, with the center of this pivotal connection being designated as the seventh pivotal connection point E. The seventh pivotal connection point E is located between the third pivotal connection point A and the fourth pivotal connection point B. Alternatively, the air inlet body 2 may be connected to a connecting rod located between the rocker 526 and the second pivotal connection point D of the crank 525. The rotational axes of each of these pivotal connections extend along the left-right direction of the range hood.

[0055] Preferably, the above rotational connections are all hinged, and each rotational connection point is a hinge point. In addition, alternatively, the smoke baffle 3 and the air inlet body 2 can also be driven independently. In order to avoid the air inlet body 2 having an excessively large range of motion, so that the space required for storage is smaller and it does not occupy too much cooking space when opened, the range of motion of the smoke baffle 3 should be much larger than the air inlet body 2, so that it can be closed at the bottom of the upper box assembly 1 and form a larger smoke-collecting range when opened. In this embodiment, the swing angle of the air inlet body 2 does not exceed 40°, and the smoke baffle 3 needs to be opened from the horizontal state of the shutdown to about 30° to 90° with the vertical direction. Therefore, the connecting line between the third rotation connection point A and the fourth rotation connection point B is the first straight line AB (the connecting line here needs to make the third rotation connection point A and the fourth rotation connection point B located on the same cross section of the rocker 526 along the thickness direction, and the following connecting lines are defined the same way), the connecting line between the fourth rotation connection point B and the fifth rotation connection point C is the second straight line BC, and the connecting line between the fifth rotation connection point C and the second rotation connection point D is the third straight line CD. The lengths of each connecting line satisfy the following relationship: first straight line AB>second straight line BC>third straight line CD.

[0056] For the movement of the smoke deflector 3, the second pivot point D serves as the fixed axis, and the fifth pivot point C serves as the driving point. To minimize the load on the fifth pivot point C while maintaining the required torque for the movement of the smoke deflector 3, the length of the third straight line CD needs to be as large as possible to meet the strength requirements of the drive structure for the heavier smoke deflector 3. To this end, the distance between the third pivot point A and the second pivot point D (i.e., the length of the first straight line AD) should be as large as possible. Therefore, in this embodiment, the third pivot point A is located at the rear top of the side panel 13, while the second pivot point D is located at the front bottom of the upper cabinet assembly 1. The cross-section of the side panel 13 (a vertical plane extending in the front-to-back direction) is rectangular, and the line connecting the third pivot point A and the second pivot point D approximates the diagonal of the cross-section of the side panel 13. This fully utilizes the cross-sectional area of ​​the side panel 13, ensuring that its cross-section (both in the vertical direction and in the front-to-back depth) is consistent with the height of the outer cabinet 11. While the outer cabinet 11 meets the cabinet depth requirements, the height dimension of the outer cabinet 11 can be minimized.

[0057] Because the third straight line CD cannot be too short, that is, the fifth rotation connection point C and the second rotation connection point D must maintain sufficient spacing to ensure that the first connecting rod 521 is strong enough to drive the crank 525, which would result in the air inlet 2 moving too much if the first connecting rod 521 were directly connected to the air inlet 2, and would not be able to maintain contact with the wall. Therefore, the above-mentioned first rotation connection point G is provided. The line connecting the fifth rotation connection point C and the first rotation connection point G is the fourth straight line CG, and the line connecting the first rotation connection point G and the second rotation connection point D is the fifth straight line GD. The lengths of these lines satisfy the following relationship: fourth straight line CG > fifth straight line GD, thereby controlling the movement of the air inlet 2 within a smaller range.

[0058] The line connecting the third rotation connection point A and the seventh rotation connection point E is the sixth straight line AE, the line connecting the seventh rotation connection point E and the fourth rotation connection point B is the seventh straight line EB, and the line connecting the seventh rotation connection point E and the sixth rotation connection point F is the eighth straight line EF. As described above, the movement amplitude of the first connecting rod 521 closely represents the movement amplitude of the air inlet body 2. In this embodiment, the connecting rod 522 is used to replace the first connecting rod 521 to reduce the movement amplitude. The second straight line BC, FG (the line connecting the first rotation connection point G and the sixth rotation connection point F), the third straight line CD, and the eighth straight line EF form a parallelogram. That is, EF and CD should be as equal as possible in length to ensure that the movement amplitudes of the first connecting rod 521 and the connecting rod 522 (air inlet body 2) are similar. In addition, considering that the connecting rod 522 bears the weight of the air inlet body 2, the length of the connecting rod 522 should be close to the front-to-back depth of the air inlet body 2. Therefore, the seventh rotation connection point E is preferably located on the rocker 526. In order to meet the movement requirements of the connecting rod 522, when the movement range of the first rotating connection point G is limited, it is necessary to ensure the upper and lower range of the sixth rotating connection point F, and the length of each connecting line satisfies the following relationship: 2*seventh straight line EB<sixth straight line AE<4*seventh straight line EB, seventh straight line EB<eighth straight line EF<3*seventh straight line EB. Beyond this range, the movement range of the connecting rod 522 will be too large or too small.

[0059] Through the arrangement of the above-described motion mechanism, the air inlet body 2 can rotate (flip) about a non-fixed axis relative to the upper housing assembly 1. Its rotation center (first rotation connection point G) also rotates about the second rotation connection point D, while the crank 525 rotates about a fixed axis about the second rotation connection point D. This allows the smoke damper 3 to rotate (flip) about a non-fixed axis relative to the upper housing assembly 1. When the smoke damper 3 is open, the fifth rotation connection point C and the first rotation connection point G are located behind the second rotation connection point D. When the smoke damper 3 is closed, the fifth rotation connection point C and the first rotation connection point G are located in front of the second rotation connection point D.

[0060] During the movement of the air inlet body 2, the smoke baffle 3 and the movement mechanism, when the range hood is switched from the closed state (such as Figure 5 When the range hood is opened (as shown), the output end of the driving mechanism 51 extends downward, the air inlet body 2 tilts downward, the rocker 526 rotates backward, and the first connecting rod 521 rotates backward and downward, causing the air inlet body 2 to move backward and tilt downward. During the opening process, the air inlet body 2 remains in close contact with the wall surface on which the range hood is mounted. The first connecting rod 521 also pulls the crank 525 to tilt, causing the smoke baffle 3 to open. To close, the movement is reversed.

[0061] A slide rail 14 is provided within the upper housing assembly 1, such as on the side panel 14. A slider 527 can be provided at the upper end of the transmission rod 524, which slidably engages with the slide rail 14 and allows for vertical movement along the rail 14. After the transmission mechanism is designed, the sliding trajectory of the slide rail 14 can be obtained by performing spline curve fitting based on the motion trajectory of the sixth rotational connection point F (multi-link node motion), ensuring that the oil cup 4 is always in an up-and-down orientation.

[0062] While the transmission rod 524 moves around the sixth rotation connection point F, it maintains its posture by sliding with the slide rail 14, so that the oil cup 4 can move relative to the air inlet body 2, and finally realizes the lifting movement, so that the oil cup 4 is always in the up and down direction (the opening of the oil cup 4 always remains upward), ensuring the oil storage capacity of the oil cup 4.

Claims

1. A range hood comprising: Upper box assembly (1); The air inlet body (2) can move relative to the upper box assembly (1) and have a first state and a second state, wherein the air inlet body (2) can be in a state where at least a portion of the air inlet body is lower than the bottom of the upper box assembly (1) and is exposed from the upper box assembly (1); An oil cup (4) is arranged at the rear bottom of the air inlet body (2); and A motion mechanism, comprising a driving mechanism (51) for driving the air inlet body (2) to move; Its characteristics are: The motion mechanism further includes a transmission mechanism, which includes a transmission rod (524), one end of which is fixed to the oil cup (4), and the other end of which is connected to the upper box assembly (1) in an up-and-down sliding manner. The transmission rod (524) is also rotationally connected to the air inlet body (2), so that the oil cup (4) maintains an up-and-down orientation.

2. The range hood according to claim 1, characterized in that: The upper box assembly (1) includes a slide rail (14), and a slider (527) is provided at the end of the transmission rod (524), and the slider (527) is in sliding engagement with the slide rail (14).

3. The range hood according to claim 1 or 2, characterized in that: The front end of the air inlet body (2) is directly or indirectly connected to the upper box assembly (1) for rotation, and the center of the rotation connection is recorded as a first rotation connection point (G). The first rotation connection point (G) can rotate around a center point (D) located in the upper box assembly (1).

4. The range hood according to claim 3, characterized in that: The range hood further comprises a rod, one end of which is rotatably connected to the upper box assembly (1), and the center of the rotatable connection coincides with the center point (D), and the center point (D) serves as a second rotatable connection point.

5. The range hood according to claim 4, characterized in that: The range hood further comprises a smoke baffle (3) which is rotatable relative to the upper box assembly (1); the smoke baffle (3) is directly or indirectly fixed to the rod.

6. The range hood according to claim 5, characterized in that: The upper box assembly (1) is also provided with a third rotation connection point (A), and at least two connecting rods are connected between the rod and the third rotation connection point (A) in an end-to-end rotational connection, one of which is movably connected to the air inlet body (2).

7. The range hood according to claim 6, characterized in that: The at least two connecting rods are a rocking rod (526) and a first connecting rod (521), one end of the rocking rod (526) is rotationally connected to the upper box assembly (1) through a third rotation connection point (A), the first connecting rod (521) is rotationally connected to the rocking rod (526), ​​and the center of the rotation connection is recorded as a fourth rotation connection point (B), the first connecting rod (521) is rotationally connected to the rod member, and the center of the rotation connection is recorded as a fifth rotation connection point (C), and the first rotation connection point (G) is located between the fifth rotation connection point (C) and the second rotation connection point.

8. The range hood according to claim 7, characterized in that: A sixth rotation connection point (F) is provided at the rear end of the air inlet body (2), and the air inlet body (2) is rotationally connected to the rocker (526) or the first connecting rod (521) via the sixth rotation connection point (F).

9. The range hood according to claim 8, characterized in that: The air inlet body (2) is rotationally connected to the rocker (526) via the second connecting rod (523), and the center of the rotational connection is recorded as the seventh rotational connection point (E).

10. The range hood according to claim 4, characterized in that: A connecting rod (522) extending along the front-to-back direction of the range hood is fixed to the air inlet body (2); the front end of the connecting rod (522) is rotatably connected to the rod member via a first rotation connection point (G); and the transmission rod (524) is rotatably connected to the connecting rod (522).

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