A range hood

Abstract

The oil fume extractor comprises a casing, an oil cup, and a baffle. The front side wall of the casing is provided with an oil fume inlet, and the bottom wall is provided with an oil leakage hole. The oil cup is arranged below the casing. The baffle is arranged on the casing and can rotate forward and backward around the first axis extending leftward and rightward to open or close the oil fume inlet under the drive of a driving mechanism. The baffle has an upper edge close to the first axis and a lower edge away from the first axis. The lower edge of the baffle in the closed state of the oil fume inlet extends above the oil cup and is opposite to the top opening of the oil receiving cavity. The driving mechanism and the oil cup are drivingly connected through a transmission mechanism. When the driving mechanism drives the baffle in the closed state of the oil fume inlet to rotate forward, the transmission mechanism is arranged to convert the driving force of the driving mechanism into the driving force of the at least front side of the oil cup to move downward relative to the bottom wall of the casing so that the oil cup is located outside the rotating path of the lower edge of the baffle. The oil fume extractor can receive oil while avoiding interference with the rotation of the baffle.

Description

Technical Field

[0001] This invention belongs to the field of kitchen appliance technology, specifically relating to a range hood. Background Technology

[0002] Existing range hoods rely on the operation of an internal fan system to create a negative pressure zone, allowing the kitchen fumes to escape outdoors under atmospheric pressure. To prevent fumes from escaping, a movable baffle is typically installed at the fumes inlet. A specific example is the Chinese invention patent application (application number 202310804283.4, publication number CN116734301A) entitled "Baffle Driving System, Baffle Driving Method, Range Hood, Storage Medium," which describes a baffle driving system connected to the baffle, including a motor; a transmission mechanism connected between the motor and the baffle, capable of converting the motor's rotational motion into a swinging motion of the baffle; and a hydraulic system connected to the transmission mechanism, used to provide resistance to the transmission mechanism to adjust the driving speed of the baffle.

[0003] The design of the smoke baffle effectively intercepts rising cooking fumes, reducing the risk of fumes escaping. However, existing grease cups are mostly installed at the bottom of the range hood, and the movement of the smoke baffle involves rotation. During the opening and closing process, there is a risk of collision between the smoke baffle and the grease cup. Therefore, a certain gap is left between the grease cup and the smoke baffle in the design to avoid interference. However, after the range hood has been used for a period of time, grease will accumulate on the surface of the smoke baffle. The gap prevents the grease on the smoke baffle from flowing into the grease cup and causes it to drip onto the stovetop, affecting the user experience.

[0004] Additionally, when a range hood is installed in a cabinet or on a wall, a gap is usually left between the back of the range hood casing and the wall surface. When the range hood is working, some of the rising fumes can enter this gap, causing grease to accumulate on the wall surface. Summary of the Invention

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

[0006] The technical solution adopted by the present invention to solve the above-mentioned 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] An oil cup, located at the bottom of the housing, has an oil receiving chamber with an opening at the top, used to collect oil from the oil drain hole inside the housing.

[0009] The smoke baffle is arranged on the casing and can rotate around the first axis extending leftward and rightward to open or close the smoke inlet under the drive of the driving mechanism. The smoke baffle has an upper edge close to the first axis and a lower edge away from the first axis. The lower edge of the smoke baffle in the closed state of the smoke inlet extends above the oil cup and is opposite the top opening of the oil receiving cavity.

[0010] The application is characterized in that:

[0011] The driving mechanism and the oil cup are connected through a transmission mechanism. When the smoke baffle in the closed state of the smoke inlet is driven to rotate forward, the transmission mechanism is arranged to convert the driving force of the driving mechanism into the downward movement of at least the front side of the oil cup relative to the bottom wall of the casing so that the oil cup is outside the rotating path of the lower edge of the smoke baffle.

[0012] In this way, when the smoke baffle in the closed state of the smoke inlet is rotated forward, at least the front side of the oil cup can be synchronously moved downward to avoid the rotating path of the lower edge of the smoke baffle, thereby avoiding the interference of the oil cup with the rotation of the smoke baffle. The top opening of the oil cup before and after the downward movement of at least the front side is always upward, which can receive the oil flowing down from the bottom wall of the casing, thereby enabling the application to receive oil while avoiding interference with the rotation of the smoke baffle.

[0013] The movement includes movement, rotation, and movement + rotation.

[0014] Preferably, the oil cup is arranged to rotate around the second axis extending leftward and rightward. When the smoke baffle in the closed state is rotated forward, at least the front side of the oil cup is rotated 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 is inclined forward. The oil cup in the state of the top opening inclined forward can receive oil without affecting the oil receiving, and can also avoid the rotating path of the lower edge of the smoke baffle.

[0015] When the range hood is installed on the wall surface to be installed such as a cabinet or a wall, a gap is generally left between the rear side of the casing of the range hood and the wall surface to be installed. When the range hood is working, part of the oil fume rising upward will enter the gap and cause the wall surface to be installed to be oily. Therefore, in order to avoid the oil fume entering the gap between the rear side of the range hood and the wall surface to be installed, preferably, the second axis is above the oil cup and corresponds to the central position in the front and back direction of the oil cup.

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

[0017] When the smoke baffle in the closed state rotates forward, the front side of the oil cup rotates downward relative to the bottom wall of the casing under the action of the transmission mechanism, 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 is inclined 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. In turn, it can play a role in blocking the upward movement of oil fume, avoiding the entry of oil fume into 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 casing and the rotation axis thereof extends left and right, the front end thereof is a power output end, and the power output end is connected to the smoke baffle through a hinge piece, so that the forward and backward stretching force of the power output end can be converted into the rotation of the smoke baffle through the hinge piece.

[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 thereof 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 thereof 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] The bottom of the casing is provided with a mounting seat for mounting the oil cup, and the mounting seat is provided with a driven gear meshing with the driving gear, and the central axis of the driven gear is the second axis.

[0023] In the above scheme, it is also preferable that the oil cup is arranged in a movable manner 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] Further, the smoke baffle in the closed state has an intermediate position, an open position and a closed position in sequence during the process of rotating forward,

[0025] and when the smoke baffle in the closed state rotates to the intermediate position, the oil cup as a whole moves downward relative to the bottom wall of the casing under the action of the transmission mechanism and moves away from the bottom wall of the casing, 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 under the action of the transmission mechanism and moves close to the bottom wall of the casing.

[0026] In the prior art, if the oil cup moves away from the bottom wall of the casing, the oil cup will move close to the cooking bench, and the oil fume generated during cooking on the cooking bench is easy to condense into oil stains on the bottom surface of the oil cup during the upward rising process, thereby causing the surface of the oil cup to be contaminated. The above structure of the present application can solve this technical problem and avoid the interference of the oil cup with the rotation of the smoke baffle.

[0027] Further, the driving mechanism comprises an electric push rod, the rear end of which is rotatably connected to the casing and extends leftward and rightward along a rotation axis, the front end of which is a power output end, and the power output end is connected to the smoke baffle through a hinge, so that the front and back extension force of the power output end can be converted into the rotation of the smoke baffle through the hinge;

[0028] The bottom of the casing 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 extends leftward and rightward along a rotation axis;

[0031] A connecting rod, the lower end of which is rotatably connected to the middle part of the transmission rod and extends leftward and rightward along a rotation axis, and the upper end of which is rotatably connected to the casing and extends leftward and rightward along a rotation axis;

[0032] An adapter, which is rotatably connected to the mounting seat and extends leftward and rightward along a rotation axis, and the adapter is provided with a hole through which the rear end of the transmission rod passes, 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 piece which can be inserted into the slot from front to back, and the mounting seat is provided with a limiting piece for limiting the forward movement of the insert piece out of the slot.

[0034] Preferably, the limiting piece comprises a limiting block which is constrained above the insert piece by a spring extending upward and downward and always has a tendency to press downward on the insert piece under the action of the spring.

[0035] In the above-mentioned schemes, preferably, the front side wall of the casing is inclined rearward from top to bottom, the bottom wall of the casing extends rearward from the lower edge of the front side wall, and the smoke baffle in the closed state of the smoke inlet is inclined rearward from top to bottom. When the smoke baffle is closed, the oil drops on the surface of the smoke baffle can flow downward along the surface of the smoke baffle under the action of gravity and be collected into the oil cup.

[0036] Compared with the prior art, the oil cup can avoid interfering with the rotation of the smoke baffle when the smoke baffle in the closed state of the smoke inlet is rotated forward, at least the front side of the oil cup can be synchronously moved downward to avoid the rotation path of the lower edge of the smoke baffle, and the top opening of the oil cup before and after the front side is moved downward is always upward, which can receive the oil stains flowing down from the bottom wall of the casing, so that the oil collecting function of the oil collecting device can be realized while avoiding interfering with the rotation of the smoke baffle. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 It is a structure diagram of the range hood of the first embodiment of the present application (the smoke baffle is closed to the smoke inlet).

[0038] Figure 2 for Figure 1 a longitudinal sectional view of the range hood;

[0039] Figure 3 for Figure 1 a perspective exploded view of the partial structure of the range hood;

[0040] Figure 4 a schematic view of the structure of the range hood of the embodiment one of the present application (the smoke baffle is opened to the smoke inlet);

[0041] Figure 5 for Figure 4 a side view of the range hood;

[0042] Figure 6 for Figure 4 a longitudinal sectional view of the partial structure of the range hood;

[0043] Figure 7 a schematic view of the structure of the range hood of the embodiment two of the present application (the smoke baffle is closed to the smoke inlet);

[0044] Figure 8 for Figure 7 a longitudinal sectional view of the partial structure of the range hood;

[0045] Figure 9 a schematic view of the structure of the range hood of the embodiment two of the present application (the smoke baffle is opened to the smoke inlet);

[0046] Figure 10 for Figure 9 a longitudinal sectional view of the partial structure of the range hood;

[0047] Figure 11 a longitudinal sectional view of the partial structure of the range hood of the embodiment three of the present application (the smoke baffle is closed to the smoke inlet);

[0048] Figure 12 a longitudinal sectional view of the partial structure of the range hood of the embodiment three of the present application (the smoke baffle is in the intermediate position);

[0049] Figure 13 a schematic view of the structure of the range hood of the embodiment three of the present application (the smoke baffle is in the opened position);

[0050] Figure 14 for Figure 13 a longitudinal sectional view of the partial structure of the range hood. DETAILED DESCRIPTION

[0051] The present application will be further described in conjunction with the embodiments of the drawings.

[0052] Embodiment one:

[0053] As shown in Fig. 1, a preferred embodiment of the present application is a range hood, which comprises a machine shell 1, a fan system, an oil cup 2, a driving mechanism 3 and a smoke baffle 4. Figures 1 to 6 The machine shell 1 is internally hollowed to form a chamber 10, and the front side wall of the chamber 10 is inclined rearward from top to bottom and is provided with an air 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 11 for facing the wall surface to be installed. The top wall of the chamber 10 is provided with an air outlet.

[0054] The fan system is a conventional centrifugal fan, which is arranged in the machine shell 1 and is used to drive the oil fume flow to enter the chamber 10 from the air inlet 10a and to be discharged from the air outlet.

[0055] The smoke baffle 4 is arranged at the air inlet 10a and can be flipped forward and backward around a first axis extending leftward and rightward to open and close the air inlet 10a. The first axis is adjacent to the upper edge 41 of the smoke baffle 4 and is away from the lower edge 42 of the smoke baffle 4. When the air inlet 10a is closed, the smoke baffle 4 is inclined rearward from top to bottom. When the air inlet 10a is opened, the smoke baffle 4 is inclined forward from top to bottom.

[0056] The oil cup 2 is in the shape of a long strip extending leftward and rightward. It is arranged below the bottom wall of the machine shell 1 and has an oil receiving cavity with a top opening 20 to receive the oil stains output from the oil leakage hole in the machine shell 1. The oil cup 2 has a rear side wall 21 for facing the wall surface to be installed. Meanwhile, the oil cup 2 is arranged in a manner that it can rotate around a second axis extending leftward and rightward. The second axis is above the oil cup 2 and corresponds to the central position of the oil cup 2 in the front-rear direction. The oil cup 2 has the following two states:

[0057] In the inclined state, the top opening 20 of the oil cup 2 is inclined forward and is opposite to the oil leakage hole. The rear side wall 21 of the oil cup 2 is inclined rearward from top to bottom and protrudes relative to the rear side 11 of the machine shell 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 surface to be installed. 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°. In the inclined state, the oil cup 2 is located outside the rotation path of the lower edge of the smoke baffle 4.

[0058] Figure 5 In the initial state, the top opening 20 of the oil cup 2 is inclined upward and is opposite to the oil leakage hole. The rear side wall 21 of the oil cup 2 extends vertically and is recessed relative to the rear side 11 of the machine shell 1. In this state, the lower edge of the smoke baffle 4 in the closed state of the air inlet 10a extends above 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.

[0059] In the initial state, the top opening 20 of the oil cup 2 is inclined upward and is opposite to the oil leakage hole. The rear side wall 21 of the oil cup 2 extends vertically and is recessed relative to the rear side 11 of the machine shell 1. In this state, the lower edge of the smoke baffle 4 in the closed state of the air inlet 10a extends above 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. Figure 2 ​The initial state of the oil cup 2 is located in 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, and the driving mechanism 3 and the oil cup 2 are connected through the transmission mechanism. When the driving mechanism 3 drives the smoke baffle 4 in the closed state of the smoke inlet 10a to rotate forward, the transmission mechanism is arranged to convert the driving force of the driving mechanism 3 into the rotation of the oil cup 2 to the inclined state. When the smoke baffle 4 is fully opened to the smoke inlet 10a, the oil cup 2 is in the inclined state; when the smoke baffle 4 is closed to the smoke inlet 10a, the oil cup 2 is switched 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 piece 32, the transmission mechanism includes a transmission rod 33 and a push rod 34, the rear end of the electric push rod 31 is rotationally connected in the shell 1 and the rotation axis extends left and right, and the front end of the electric push rod 31 is a power output end; the hinge piece 32 connects the smoke baffle 4 and the power output end of the electric push rod 31 to convert the forward and backward extension force of the power output end into the force for turning the smoke baffle 4 forward and backward; the front end of the transmission rod 33 is rotationally connected with 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 rotationally connected with 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 shell 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 engaged 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 baffle in the closed state of the smoke inlet to rotate forward, the oil cup is rotated to the 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 baffle, thereby avoiding the interference of the oil cup with the rotation of the smoke baffle. Conversely, when the driving mechanism drives the smoke baffle 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, as shown in Figure 2 , 3 , the mounting seat 12 of the embodiment has a slot 120, and the oil cup 2 is provided with an insertion piece 22 which can be inserted into the slot 120 from front to back, and the mounting seat 12 is provided with a limiting piece for limiting the forward movement of the insertion piece 22 to separate from the slot 120. The limiting piece includes a limiting block 13 which is constrained above the insertion piece 22 by a spring 14 extending upward and downward, and always has a tendency to press downward on the insertion piece 22 under the action of the spring 14. Thus, the oil cup 2 can be easily disassembled and mounted on the mounting seat 12 stably.

[0062] Embodiment two:

[0063] As shown in Figures 7 to 10As shown, this is a preferred embodiment of the range hood of the present invention. This embodiment is basically the same as the first embodiment, except that the mounting base 12 is disposed at the bottom of the housing 1 in a way that allows it to move up and down. The oil cup 2 is disposed at the bottom of the mounting base 12 and can move up and down with the mounting base. When the smoke baffle 4 in the closed state rotates forward under the drive of the drive mechanism, the oil cup 2 moves downward relative to the bottom wall of the housing 1 and moves away from the bottom wall of the housing 1 under the action of the transmission mechanism. When the smoke baffle 4 in the open state rotates backward under the drive of the drive mechanism to close the smoke inlet 10a, the oil cup 2 moves upward relative to the bottom wall of the housing 1 and moves closer to the bottom wall of the housing 1 under the action of the transmission mechanism. In this embodiment, the drive mechanism 3 includes a motor 39, an active rocker arm 301, a driven rocker arm 302, and a hinge 32. The motor shaft 391 extends left and right. The first end of the active rocker arm 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 driven rocker arm 302 is rotatably connected to the second end of the active rocker arm 301 and the rotation axis extends left and right. The second end of the driven rocker arm 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 baffle 4, and the second end of the hinge 32 is rotatably connected to the housing 1 and the rotation axis extends left and right. The rotational power of the motor shaft 391 is transmitted to the smoke baffle 4 through the active rocker arm 301, the driven rocker arm 302, and the hinge 32, and drives the smoke baffle to rotate back and forth. 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 housing 1 and the rotation axis extends left and right. The lower end of the push rod 34 is rotatably connected to the mounting base 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] Example 3:

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

[0066] In the description and claims of the present application, terms are used to generally refer to the relative position of one part to another part. These terms are used for convenience and are not intended to limit the application to only a particular orientation. The terms do not imply that the present application necessarily requires a particular orientation. Terms, such as "front," "back," "up," "down," "left," "right," "side," "top," "bottom," or the like, used in this description and / or claims are made for convenience, are not intended to imply any particular orientation or direction.

[0067] In the description and claims of the present application, the term "vertical" is used to mean substantially along the up-down direction, and is not limited to only the vertical direction, but can also be slightly inclined relative to the vertical direction.

Claims

1. A range hood comprising: a housing (1) having an inlet opening (10a) in a front side wall and an oil outlet hole in a bottom wall; an oil cup (2) disposed below the housing (1) and having an oil receiving cavity with a top opening (20) for receiving oil and dirt output from the oil outlet hole in the housing (1); a baffle plate (4) disposed on the housing (1) and capable of rotating about a first axis extending leftward and rightward to open or close the inlet opening (10a) under the drive of a drive mechanism (3), the baffle plate (4) having an upper edge (41) adjacent to the first axis and a lower edge (42) away from the first axis, and the lower edge (42) of the baffle plate (4) in the closed state of the inlet opening (10a) extending above the oil cup (2) and opposite the top opening (20) of the oil receiving cavity; characterized in that: the drive mechanism (3) and the oil cup (2) are drivingly connected through a transmission mechanism, and when the drive mechanism (3) drives the baffle plate (4) in the closed state of the inlet opening (10a) to rotate forward, the transmission mechanism is arranged to convert the driving force of the drive mechanism (3) into a downward movement of at least the front side of the oil cup (2) relative to the bottom wall of the housing (1) so that the oil cup (2) is located outside the rotation path of the lower edge (42) of the baffle plate (4).

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

3. The hood according to claim 2, characterized in that: the second axis is located above the oil cup (2) and corresponds to the central position in the front-rear direction of the oil cup (2); the housing (1) has a rear side (11) for being mounted against a wall surface; when the baffle plate (4) in the closed state rotates forward, under the action of the transmission mechanism, the front side of the oil cup (2) rotates downward relative to the bottom wall of the housing (1), and the rear side of the oil cup (2) rotates upward relative to the bottom wall of the housing (1) so that the rear side wall (21) of the oil cup (2) is inclined downward from top to bottom and protrudes relative to the rear side (11) of the housing (1), so that the lower side edge of the rear side wall (21) of the oil cup (2) can contact the wall surface to be mounted.

4. The hood according to claim 3, characterized in that: the drive mechanism (3) comprises an electric push rod (31) having a rear end rotatably connected in the housing (1) and a front end as a power output end, and a hinge member (32) connecting the power output end and the baffle plate (4), so that the forward and backward extension force of the power output end can be converted into the rotation of the baffle plate (4) through the hinge member (32); the transmission mechanism comprises: a transmission rod (33) having a front end rotatably connected with the power output end of the electric push rod (31) and a rear end rotatably connected with the upper end of a push rod (34); the push rod (34) having a lower end provided with a driving gear (35) and a rear end rotatably connected with the transmission rod (33), and the central axis of the driving gear (35) extending leftward and rightward. 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) engaged with the driving gear (35), and the central axis of the driven gear (36) is the second axis.

5. The hood according to claim 1, characterized in that: The oil cup (2) is arranged in a movable manner, and when the smoke baffle (4) in the closed state is rotated 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 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, When the smoke baffle (4) in the closed state is rotated to the intermediate 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 is relatively far 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 is relatively close to the bottom wall of the casing (1).

7. The hood according to claim 6, characterized in that: The driving mechanism (3) comprises an electric push rod (31), the rear end of which is rotationally connected in the casing (1) and the rotation axis extends left and right, the front end is a power output end, and the power output end is connected with the smoke baffle (4) through a hinge (32), so that the forward and backward stretching force of the power output end can be converted into the rotation of the smoke baffle (4) through the hinge (32); 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) engaged with the driving gear (35), and the central axis of the driven gear (36) is the second axis. The transmission mechanism comprises: A transmission rod (33) having a front end rotationally connected with the power output end of the electric push rod (31) and a rotation axis extending left and right; A connecting rod (37) having a lower end rotationally connected with the middle part of the transmission rod (33) and a rotation axis extending left and right, and an upper end rotationally connected with the casing (1) and a rotation axis extending left and right; An adapter (38) rotationally connected above the mounting seat (12) and having a rotation axis extending left and right, and the adapter (38) is provided with a hole (380) 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 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 insertion piece (22) that can be inserted into the slot (120) from front to back, and the mounting seat (12) is provided with a limiting piece for limiting the forward movement of the insertion piece (22) to separate from the slot (120).

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

10. The hood according to any one of claims 1-7, characterized in that: The front side wall of the casing (1) is inclined rearward from top to bottom, the bottom wall of the casing (1) extends rearward from the lower side of the front side wall, and the smoke baffle (4) in the closed state of the smoke inlet (10a) is inclined rearward from top to bottom.

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