Range hood

Abstract

A range hood comprises: a housing, the front side wall of which is provided with a smoke inlet and the bottom wall of which is provided with an oil leakage hole; the oil cup is arranged below the machine shell; the smoke baffle is arranged on the machine shell, can rotate front and back around a first axis extending left and right under the driving of the driving mechanism so as to open or close the smoke inlet, and is provided with an upper edge relatively close to the first axis and a lower edge relatively far away from the first axis; when the smoke inlet is closed, the lower edge of the smoke baffle extends to the upper part of the oil cup and is opposite to the top opening of the oil receiving cavity; the driving mechanism is in transmission connection with the oil cup through a transmission mechanism, and when the driving mechanism drives the smoke baffle in the state that the smoke inlet is closed to rotate forwards, the driving mechanism drives the oil cup to rotate. The transmission mechanism is arranged to be capable of converting the driving force of the driving mechanism to enable at least the front side portion of the oil cup to move downwards relative to the bottom wall of the machine shell so that the oil cup can be located outside the rotating path of the lower edge of the smoke barrier. The oil cup can receive oil, and meanwhile interference to rotation of the smoke barrier can be avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of kitchen appliances, and in particular relates to a range hood. Background Art

[0002] Existing range hoods rely on the operation of the internal fan system to form a negative pressure zone. The oil smoke airflow in the kitchen passes through the range hood under the action of atmospheric pressure and is discharged outdoors. In order to prevent oil smoke from escaping, a movable smoke baffle is generally provided at the smoke inlet of the range hood. For example, the Chinese invention patent application "Smoke baffle drive system, smoke baffle drive method, range hood, storage medium" with application number 202310804283.4 and application publication number CN116734301A has a smoke baffle drive system connected to the smoke baffle, including a motor; a transmission mechanism connected between the motor and the smoke baffle, capable of converting the rotation of the motor into a swinging motion to drive the smoke baffle; a hydraulic system connected to the transmission mechanism, used to provide resistance to the transmission mechanism to adjust the driving speed of the smoke baffle.

[0003] The design of the smoke shield can effectively intercept the rising oil smoke and reduce the risk of oil smoke escaping. However, at the same time, the existing oil cup is mostly installed at the bottom of the range hood. The movement of the smoke shield is a rotation process. There is a risk of collision with the oil cup during the opening and closing of the smoke shield. Therefore, a certain gap is left between the oil cup and the smoke shield during the design to avoid interference between the two. However, after the range hood has been used for a period of time, oil stains will condense on the surface of the smoke shield. The existence of the gap prevents the oil stains on the smoke shield from flowing into the oil cup and drips onto the stove, affecting the user experience.

[0004] At the same time, when the range hood is installed on a cabinet or a wall to be installed, there is usually a gap between the rear side of the range hood casing and the wall to be installed. When the range hood is working, some of the oil smoke will enter the gap and cause oil on the wall to be installed. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a range hood in view of the current status of the prior art, so that the oil cup can collect oil while avoiding interference with the rotation of the smoke baffle.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: a range hood, comprising:

[0007] The casing has a smoke inlet on its front side wall and an oil leakage hole on its bottom wall;

[0008] The oil cup is arranged under the casing and has an oil receiving cavity with an opening at the top, and is used to receive the oil discharged from the oil leakage hole in the casing;

[0009] a smoke baffle, which is arranged on the housing and can rotate forward and backward around a first axis extending left and right under the drive of the driving mechanism to open or close the smoke inlet, wherein the smoke baffle has an upper edge relatively close to the first axis and a lower edge relatively far from the first axis, and the lower edge of the smoke baffle in the state of closing the smoke inlet extends above the oil cup and is opposite to the top opening of the oil receiving chamber;

[0010] Features:

[0011] The driving mechanism and the oil cup are connected via a transmission mechanism, and when the driving mechanism drives the smoke baffle in a closed smoke inlet state to rotate forward, the transmission mechanism is arranged to convert the driving force of the driving mechanism into causing at least the front side portion of the oil cup to move downward relative to the bottom wall of the casing so that the oil cup is outside the rotation path of the lower edge of the smoke baffle.

[0012] In this way, when the smoke baffle rotates forward in the state of closing the smoke inlet, at least the front side of the oil cup can move downward synchronously to avoid the rotation path of the lower edge of the smoke baffle, thereby preventing the oil cup from interfering with the rotation of the smoke baffle. And at least the top opening of the oil cup before and after the front side moves downward is always facing upward, which can receive the oil stains flowing down from the bottom wall of the casing, thereby enabling the present invention to receive oil while avoiding interfering with the rotation of the smoke baffle.

[0013] The above activities include moving, rotating, and moving + rotating.

[0014] Preferably, the oil cup is arranged in a manner that it can rotate around a second axis extending left and right, and when the smoke baffle in the closed state rotates forward, at least the front side of the oil cup rotates downward relative to the bottom wall of the casing under the action of the transmission mechanism so that the top opening of the oil cup tilts forward. The oil cup with the top opening tilted forward does not affect its oil collection, and can avoid the rotation path of the lower edge of the smoke baffle.

[0015] When the range hood is installed on a cabinet or a wall to be installed, there is generally a gap between the rear side of the range hood casing and the wall to be installed. When the range hood is working, some of the oil smoke that rises will enter the gap and cause oil to stick to the wall to be installed. Therefore, in order to prevent oil smoke from entering the gap between the rear side of the range hood and the wall to be installed, preferably, the second axis is located above the oil cup, corresponding to the center of the oil cup in the front-to-back direction;

[0016] The housing has a rear side surface for facing the wall to be installed;

[0017] When the smoke baffle in the closed state rotates forward, under the action of the transmission mechanism, the front side of the oil cup rotates downward relative to the bottom wall of the casing, and the rear side of the oil cup rotates upward relative to the bottom wall of the casing, so that the rear side wall of the oil cup tilts backward from top to bottom and protrudes relative to the rear side of the casing, so that the lower edge of the rear side wall of the oil cup can contact the wall to be installed. This can play a role in shielding the oil smoke from rising and prevent the oil smoke from entering the gap between the rear side of the range hood and the wall to be installed.

[0018] Preferably, the driving mechanism comprises an electric push rod, the rear end of which is rotatably connected in the housing, and the rotation axis extends left and right, and the front end of which is a power output end, and is connected to the smoke baffle through a hinge, so that the front and rear telescopic force of the power output end can be converted through the hinge to rotate the smoke baffle;

[0019] The transmission mechanism comprises:

[0020] A transmission rod, the front end of which is rotatably connected to the power output end of the electric push rod, and the rotation axis extends left and right;

[0021] A push rod, the upper end of which is rotatably connected to the rear end of the transmission rod, and the rotation axis extends left and right, and the lower end of which is provided with a driving gear, and the central axis of the driving gear extends left and right;

[0022] A mounting seat for mounting an oil cup is provided at the bottom of the housing, and a driven gear meshing with the driving gear is provided on the mounting seat, and the central axis of the driven gear is the second axis.

[0023] In the above scheme, it is also preferred that the oil cup is arranged in a manner that it can move up and down, and when the smoke baffle in the closed state rotates forward, the oil cup as a whole moves downward relative to the bottom wall of the casing under the action of the transmission mechanism.

[0024] Furthermore, the smoke baffle in the closed state has an intermediate position and an open position in sequence during the forward rotation process.

[0025] When the smoke baffle in the closed state rotates forward to the middle position, the oil cup as a whole moves downward relative to the bottom wall of the casing and relatively away from the bottom wall of the casing under the action of the transmission mechanism, and as the smoke baffle continues to rotate to the open position, the oil cup as a whole moves upward relative to the bottom wall of the casing and relatively close to the bottom wall of the casing under the action of the transmission mechanism.

[0026] In the prior art, if the oil cup is relatively far from the bottom wall of the casing, it will cause the oil cup to be relatively close to the stove, and the oil smoke generated by cooking on the stove will easily hit the bottom of the oil cup during the upward process and condense into oil stains, thereby causing the surface of the oil cup to be contaminated. The present invention can solve this technical problem through the design of the above structure, and can prevent the oil cup from interfering with the rotation of the smoke baffle.

[0027] Further, the driving mechanism includes an electric push rod, the rear end of which is rotatably connected in the housing, and the rotation axis extends left and right, and the front end of which is a power output end, and is connected to the smoke baffle through a hinge, so that the front and rear telescopic force of the power output end can be converted through the hinge to rotate the smoke baffle;

[0028] The bottom of the housing is provided with a mounting seat for mounting the oil cup and capable of moving up and down;

[0029] The transmission mechanism comprises:

[0030] A transmission rod, the front end of which is rotatably connected to the power output end of the electric push rod, and the rotation axis extends left and right;

[0031] A connecting rod, the lower end of which is rotatably connected to the middle part of the transmission rod, and the rotation axis extends left and right, and the upper end of which is rotatably connected to the housing, and the rotation axis extends left and right;

[0032] The adapter is rotatably connected to the mounting seat and the rotation axis extends left and right. At the same time, a hole is provided in the adapter for the rear end of the transmission rod to pass through so that the transmission rod can move along the hole.

[0033] Preferably, the mounting seat has a slot, the oil cup is provided with an insert that can be inserted into the slot from front to back, and the mounting seat is provided with a limiting member for limiting the insert from moving forward and leaving the slot.

[0034] Preferably, the limiting member comprises a limiting block, which is constrained above the inserting piece by a spring extending up and down, and has a tendency to press downward against the inserting piece at all times under the action of the spring.

[0035] In the above schemes, preferably, the front side wall of the housing is tilted backward from top to bottom, the bottom wall of the housing extends backward from the lower edge of the front side wall, and the smoke shield in the state of closing the smoke inlet is tilted backward from top to bottom. When the smoke shield is closed, the oil droplets on the surface of the smoke shield can flow downward along the surface of the smoke shield under the action of their own gravity and be collected in the oil cup.

[0036] Compared with the prior art, the advantages of the present invention are: when the smoke baffle rotates forward in the state of closing the smoke inlet, at least the front side of the oil cup can move downward synchronously to avoid the rotation path of the lower edge of the smoke baffle, thereby avoiding the oil cup from interfering with the rotation of the smoke baffle. And at least the top opening of the oil cup before and after the front side moves downward is always facing upward, which can receive the oil stains flowing down from the bottom wall of the casing, thereby enabling the present invention to receive oil while avoiding interfering with the rotation of the smoke baffle. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic diagram of the structure of a range hood according to Embodiment 1 of the present invention (the smoke baffle closes the smoke inlet);

[0038] Figure 2 for Figure 1 A longitudinal cross-sectional view of a central range hood;

[0039] Figure 3 for Figure 1 A three-dimensional exploded view of the partial structure of the central range hood;

[0040] Figure 4 This is a schematic diagram of the structure of the range hood according to the first embodiment of the present invention (the smoke baffle opens the smoke inlet);

[0041] Figure 5 for Figure 4 Side view of the mid-range hood;

[0042] Figure 6 for Figure 4 A longitudinal cross-sectional view of a partial structure of a central range hood;

[0043] Figure 7 This is a schematic diagram of the structure of a range hood according to Embodiment 2 of the present invention (the smoke baffle closes the smoke inlet);

[0044] Figure 8 for Figure 7 A longitudinal cross-sectional view of a partial structure of a central range hood;

[0045] Fig. 9 This is a schematic diagram of the structure of a range hood according to Embodiment 2 of the present invention (the smoke baffle opens the smoke inlet);

[0046] Fig.10 for Fig. 9 A longitudinal cross-sectional view of a partial structure of a central range hood;

[0047] Fig.11 A longitudinal cross-sectional view of a partial structure of a range hood according to a third embodiment of the present invention (the smoke baffle closes the smoke inlet);

[0048] Fig.12 A longitudinal cross-sectional view of a partial structure of a range hood according to a third embodiment of the present invention (the smoke baffle is in the middle);

[0049] Fig.13 This is a schematic diagram of the structure of a range hood according to Embodiment 3 of the present invention (the smoke baffle is in the open position);

[0050] Fig.14 for Fig.13 A longitudinal cross-sectional view of the partial structure of a mid-range hood. DETAILED DESCRIPTION

[0051] The present invention is further described in detail below with reference to the accompanying drawings.

[0052] Embodiment 1:

[0053] like Figures 1 to 6 As shown, a preferred embodiment 1 of a range hood of the present invention is shown. The range hood of this embodiment includes a housing 1, a fan system, an oil cup 2, a driving mechanism 3 and a smoke baffle 4.

[0054] The housing 1 is hollow inside and has a chamber 10, and the front side wall of the chamber 10 is tilted backward from top to bottom and is provided with a smoke inlet 10a. The bottom wall of the chamber 10 is provided with an oil leakage hole. The rear wall of the chamber 10 extends vertically and has a rear side surface 11 for facing the wall to be installed. The top wall of the chamber 10 is provided with a smoke outlet.

[0055] The fan system is an existing centrifugal fan, which is arranged in the casing 1 and is used to drive the oil smoke flow into the chamber 10 through the smoke inlet 10a and discharged from the smoke outlet.

[0056] The above-mentioned smoke baffle 4 is arranged at the smoke inlet 10a in a manner that it can be flipped forward and backward around a first axis extending left and right to open and close the smoke inlet 10a. The first axis is adjacent to the upper edge 41 of the smoke baffle 4 and away from the lower edge 42 of the smoke baffle 4; and when the smoke inlet 10a is in a closed state, the smoke baffle 4 tilts backward from top to bottom; when the smoke inlet 10a is in an open state, the smoke baffle 4 tilts forward from top to bottom.

[0057] The oil cup 2 is in the shape of a long strip extending left and right. It is arranged below the bottom wall of the housing 1 and has an oil receiving cavity with a top opening 20 to receive the oil discharged from the oil leakage hole in the housing 1. The oil cup 2 has a rear side wall 21 facing the wall to be installed. At the same time, the oil cup 2 is arranged in a manner that it can rotate around a second axis extending left and right. The second axis is located above the oil cup 2, corresponding to the center of the oil cup 2 in the front-to-back direction. The oil cup 2 has the following two states:

[0058] The top opening 20 of the oil cup 2 is tilted forward and still in an inclined state relative to the oil leakage hole, and the rear side wall 21 of the oil cup 2 is tilted backward from top to bottom and protrudes relative to the rear side surface 11 of the housing 1, so that the lower edge of the rear side wall 21 of the oil cup 2 can be adjacent to or in contact with the wall to be installed; and in the inclined state, the inclination angle a of the rear side wall 21 of the oil cup 2 relative to the vertical plane is ≤5°, please refer to Figure 5 The oil cup 2 in the inclined state is located outside the rotation path of the lower edge of the smoke baffle 4.

[0059] In the initial state, the top opening 20 of the oil cup 2 faces upward and is opposite to the oil leakage hole. The rear side wall 21 of the oil cup 2 extends vertically and is retracted relative to the rear side surface 11 of the housing 1. At this time, the lower edge of the smoke baffle 4 in the state of closing the smoke inlet 10a extends to the top of the top opening 20 of the oil cup 2 in the initial state and is opposite to the top opening 20 of the oil cup 2. For details, please refer to Figure 2And the oil cup 2 in the initial state is located on the rotation path of the lower edge of the smoke baffle 4.

[0060] The driving mechanism 3 acts on the smoke baffle 4 to drive the smoke baffle 4 to rotate. At the same time, the driving mechanism 3 and the oil cup 2 are connected by a transmission mechanism. When the driving mechanism 3 drives the smoke baffle 4 in the state of closing the smoke inlet 10a to rotate forward, the transmission mechanism is arranged to convert the driving force of the driving mechanism 3 into rotating the oil cup 2 to a tilted state. When the smoke baffle 4 fully opens the smoke inlet 10a, the oil cup 2 is in a tilted state; when the smoke baffle 4 closes the smoke inlet 10a, the oil cup 2 switches to the initial state under the action of the transmission mechanism. Specifically, the driving mechanism 3 includes an electric push rod 31 and a hinge 32, and the transmission mechanism includes a transmission rod 33 and a push rod 34. The rear end of the electric push rod 31 is rotatably connected in the casing 1, and the rotation axis extends left and right, and the front end of the electric push rod 31 is the power output end; the hinge 32 connects the smoke baffle 4 and the power output end of the electric push rod 31 to convert the front and rear telescopic force of the power output end into a force that flips the smoke baffle 4 back and forth; the front end of the transmission rod 33 is rotatably connected to the power output end of the electric push rod 31, and the rotation axis extends left and right; the upper end of the push rod 34 is rotatably connected to the rear end of the transmission rod 33, and the rotation axis extends left and right, and the lower end of the push rod 34 is provided with a driving gear 35, and the central axis of the driving gear 35 extends left and right; the bottom of the casing 1 is provided with a mounting seat 12 for mounting the oil cup 2, and the mounting seat 12 is provided with a driven gear 36 meshing with the driving gear 35, and the central axis of the driven gear 36 is the second axis. In this way, when the driving mechanism drives the smoke shield to rotate forward in the state of closing the smoke inlet, the oil cup rotates to an inclined state under the action of the driving mechanism and the transmission mechanism to avoid the rotation path of the lower edge of the smoke shield, thereby preventing the oil cup from interfering with the rotation of the smoke shield. Conversely, when the driving mechanism drives the smoke shield to rotate backward to close the smoke inlet, the oil cup is reset to the initial state under the action of the driving mechanism and the transmission mechanism.

[0061] At the same time, if Figure 2 , 3 As shown, the mounting seat 12 of this embodiment has a slot 120, and the oil cup 2 is provided with an inserting piece 22 that can be inserted into the slot 120 from front to back, and a limiting member for limiting the inserting piece 22 from moving forward and leaving the slot 120 is provided in the mounting seat 12. The limiting member includes a limiting block 13, which is constrained above the inserting piece 22 by a spring 14 extending up and down, and always has a tendency to press against the inserting piece 22 downward under the action of the spring 14. This facilitates the disassembly and assembly of the oil cup 2, and can ensure that the oil cup 2 is stably mounted on the mounting seat 12.

[0062] Embodiment 2:

[0063] like Figures 7-10As shown, it is a preferred embodiment 2 of a range hood of the present invention, which is basically the same as the embodiment 1, except that in this embodiment, the mounting seat 12 is arranged at the bottom of the housing 1 in a manner that it can move up and down, and the oil cup 2 is arranged at the bottom of the mounting seat 12 and can move up and down together with the mounting seat. When the smoke baffle 4 in the closed state rotates forward under the drive of the driving mechanism, the oil cup 2 as a whole moves downward relative to the bottom wall of the housing 1 and relatively away from the bottom wall of the housing 1 under the action of the transmission mechanism, and when the smoke baffle 4 in the open state rotates backward under the drive of the driving mechanism to close the smoke inlet 10a, the oil cup 2 as a whole moves upward relative to the bottom wall of the housing 1 under the action of the transmission mechanism and relatively close to the bottom wall of the housing 1. In this embodiment, the driving mechanism 3 includes a motor 39, an active rocker 301, a slave rocker 302 and a hinge 32. The motor shaft 391 extends left and right. The first end of the active rocker 301 is sleeved on the outer periphery of the motor shaft 391 and can rotate with the motor shaft 391. The first end of the slave rocker 302 is rotatably connected to the second end of the active rocker 301 and the rotation axis extends left and right. The second end of the slave rocker 302 is rotatably connected to the hinge 32 and the rotation axis extends left and right. The first end of the hinge 32 is connected to the smoke damper 4, and the second end of the hinge 32 is rotatably connected to the casing 1 and the rotation axis extends left and right. The rotational force of the motor shaft 391 is transmitted to the smoke damper 4 through the active rocker 301, the slave rocker 302 and the hinge 32, and drives the smoke damper to rotate forward and backward. The transmission mechanism includes a transmission rod 33, a push rod 34 and a connecting rod 37. The front end of the transmission rod 33 is rotatably connected to the hinge 32 and the rotation axis extends left and right. The upper end of the connecting rod 37 is rotatably connected to the casing 1 and the rotation axis extends left and right. The lower end of the push rod 34 is rotatably connected to the mounting seat and the rotation axis extends left and right. The upper end of the push rod 34, the lower end of the connecting rod 37 and the rear end of the transmission rod 33 are rotatably connected and the rotation axis extends left and right.

[0064] Embodiment three:

[0065] like Figures 11 to 14 As shown in FIG. 1 , a preferred embodiment 3 of a range hood of the present invention is shown. This embodiment is basically the same as the second embodiment, except that the smoke baffle 4 in the closed state in this embodiment has an intermediate position and an open position in sequence during the forward rotation process, and when the smoke baffle 4 in the closed state rotates forward to the intermediate position, as shown in FIG. Fig.12 As shown, the oil cup 2 as a whole moves downward relative to the bottom wall of the casing 1 under the action of the transmission mechanism and relatively away from the bottom wall of the casing 1, and as the smoke baffle 4 continues to rotate to the open position, as shown in FIG. Fig.13 , 14As shown, the oil cup 2 as a whole moves upward relative to the bottom wall of the housing 1 under the action of the transmission mechanism and is relatively close to the bottom wall of the housing 1. In this embodiment, the driving mechanism 3 includes an electric push rod 31, the rear end of which is rotatably connected in the housing 1, and the rotation axis extends left and right, and the front end of which is a power output end, and is connected to the smoke baffle 4 through a hinge 32, so that the front and rear telescopic force of the power output end can be converted through the hinge 32 to rotate the smoke baffle 4. The transmission mechanism includes a transmission rod 33, a connecting rod 37 and an adapter 38. The front end of the transmission rod 33 is rotatably connected to the power output end of the electric push rod 31, and the rotation axis extends left and right; the lower end of the connecting rod 37 is rotatably connected to the middle part of the transmission rod 33, and the rotation axis extends left and right; the upper end of the connecting rod 37 is rotatably connected to the casing 1, and the rotation axis extends left and right; the adapter 38 is rotatably connected to the mounting seat 12, and the rotation axis extends left and right. At the same time, a channel 380 is provided in the adapter 38 for the rear end of the transmission rod 33 to pass through, so that the transmission rod 33 can move along the channel 380.

[0066] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations 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.

[0067] The term "vertical" is also used in the specification and claims of the present invention, which means basically along the up and down direction, and is not limited to the vertical direction only, and can also be slightly inclined relative to the vertical direction.

Claims

1. A range hood, comprising: The casing (1) has a smoke inlet (10a) on its front side wall and an oil leakage hole on its bottom wall; An oil cup (2) is arranged below the casing (1) and has an oil receiving chamber with a top opening (20) for receiving oil dirt output from the oil leakage hole in the casing (1); A smoke baffle (4) is arranged on the housing (1) and can be driven by a driving mechanism (3) to rotate forward and backward around a first axis extending leftward and rightward to open or close the smoke inlet (10a). The smoke baffle (4) has an upper edge (41) relatively close to the first axis and a lower edge (42) relatively far from the first axis. The lower edge (42) of the smoke baffle (4) in the state of closing the smoke inlet (10a) extends above the oil cup (2) and is opposite to the top opening (20) of the oil receiving chamber. Features: The driving mechanism (3) and the oil cup (2) are connected via a transmission mechanism, and when the driving mechanism (3) drives the smoke baffle (4) in a closed smoke inlet (10a) state to rotate forward, the transmission mechanism is arranged to convert the driving force of the driving mechanism (3) into causing at least the front side portion of the oil cup (2) to move downward relative to the bottom wall of the casing (1) so that the oil cup (2) is located outside the rotation path of the lower edge (42) of the smoke baffle (4).

2. The range hood according to claim 1, characterized in that: The oil cup (2) is arranged in a manner that it can rotate around a second axis extending leftward and rightward, and when the smoke baffle (4) in a closed state rotates forward, at least the front side portion of the oil cup (2) rotates downward relative to the bottom wall of the casing (1) under the action of the transmission mechanism, so that the top opening (20) of the oil cup (2) tilts forward.

3. The range hood according to claim 2, characterized in that: The second axis is located above the oil cup (2), corresponding to the center of the oil cup (2) in the front-rear direction; The housing (1) has a rear side surface (11) facing the wall to be installed; When the smoke baffle (4) in the closed state rotates forward, under the action of the transmission mechanism, the front side portion of the oil cup (2) rotates downward relative to the bottom wall of the casing (1), and the rear side portion of the oil cup (2) rotates upward relative to the bottom wall of the casing (1), so that the rear side wall (21) of the oil cup (2) tilts backward from top to bottom and protrudes relative to the rear side surface (11) of the casing (1), so that the lower side edge of the rear side wall (21) of the oil cup (2) can contact the wall to be installed.

4. The range hood according to claim 3, characterized in that: The driving mechanism (3) comprises an electric push rod (31), the rear end of which is rotatably connected to the housing (1) and the rotation axis extends left and right, and the front end of which is a power output end and is connected to the smoke baffle (4) via a hinge (32), so that the front and rear telescopic force of the power output end can be converted into rotation of the smoke baffle (4) via the hinge (32); The transmission mechanism comprises: A transmission rod (33), the front end of which is rotatably connected to the power output end of the electric push rod (31), and the rotation axis extends left and right; A push rod (34), the upper end of which is rotatably connected to the rear end of the transmission rod (33) and the rotation axis extends left and right, and the lower end of which is provided with a driving gear (35), the central axis of the driving gear (35) extends left and right; A mounting seat (12) for mounting the oil cup (2) is provided at the bottom of the housing (1), and a driven gear (36) meshing with the driving gear (35) is provided on the mounting seat (12), and the central axis of the driven gear (36) is the second axis.

5. The range hood according to claim 1, characterized in that: The oil cup (2) is arranged to be movable up and down, and when the smoke baffle (4) in a closed state rotates forward, the oil cup (2) as a whole moves downward relative to the bottom wall of the casing (1) under the action of the transmission mechanism.

6. The range hood according to claim 5, characterized in that: The smoke baffle (4) in the closed state has an intermediate position and an open position in sequence during the forward rotation process. When the smoke baffle (4) in the closed state rotates forward to the middle position, the oil cup (2) as a whole moves downward relative to the bottom wall of the casing (1) under the action of the transmission mechanism and moves relatively away from the bottom wall of the casing (1), and as the smoke baffle (4) continues to rotate to the open position, the oil cup (2) as a whole moves upward relative to the bottom wall of the casing (1) under the action of the transmission mechanism and moves relatively close to the bottom wall of the casing (1).

7. The range hood according to claim 6, characterized in that: The driving mechanism (3) comprises an electric push rod (31), the rear end of which is rotatably connected to the housing (1) and the rotation axis extends left and right, and the front end of which is a power output end and is connected to the smoke baffle (4) via a hinge (32), so that the front and rear telescopic force of the power output end can be converted into rotation of the smoke baffle (4) via the hinge (32); The bottom of the housing (1) is provided with a mounting seat (12) for mounting the oil cup (2) and capable of moving up and down; The transmission mechanism comprises: A transmission rod (33), the front end of which is rotatably connected to the power output end of the electric push rod (31), and the rotation axis extends left and right; A connecting rod (37), the lower end of which is rotatably connected to the middle part of the transmission rod (33) and the rotation axis extends left and right, and the upper end of which is rotatably connected to the housing (1) and the rotation axis extends left and right; The adapter (38) is rotatably connected to the mounting seat (12) and has a rotation axis extending left and right. At the same time, a hole (380) is provided in the adapter (38) for the rear end of the transmission rod (33) to pass through, so that the transmission rod (33) can move along the hole (380).

8. The range hood according to claim 4 or 7, characterized in that: The mounting seat (12) has a slot (120), the oil cup (2) is provided with an insert (22) that can be inserted into the slot (120) from front to back, and a limiting member is provided in the mounting seat (12) for limiting the insert (22) from moving forward and escaping from the slot (120).

9. The range hood according to claim 8, characterized in that: The limiting member comprises a limiting block (13), which is constrained above the inserting piece (22) by means of a spring (14) extending upward and downward, and has a tendency to always press downward against the inserting piece (22) under the action of the spring (14).

10. The range hood according to any one of claims 1 to 7, characterized in that: The front side wall of the housing (1) is tilted backward from top to bottom, the bottom wall of the housing (1) extends backward from the lower side of the front side wall, and the smoke baffle (4) in a state of closing the smoke inlet (10a) is tilted backward from top to bottom.

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