Range hood

Abstract

The range hood comprises a lower box body and a smoke baffle, the front face of the lower box body comprises a first panel extending from front to back, the first panel is provided with a first smoke inlet, and the smoke baffle can open and close the first smoke inlet; the second panel extends downwards from the end part of the rear side of the first panel, and a second smoke inlet is formed in the second panel; the range hood further comprises a lower sliding plate, the lower sliding plate can open and close the second smoke inlet, and when the lower sliding plate is in the state of opening the second smoke inlet, the lower sliding plate is located in the lower box body.

Description

Technical Field

[0001] This invention relates to an oil fume purification device, and more particularly to an oil fume extractor. Background Technology

[0002] Range hoods have become an indispensable kitchen appliance in modern homes. They operate on the principles of fluid dynamics, using a fan system installed inside to draw in cooking fumes and filtering out some grease particles with a filter. The fan system is typically a centrifugal fan, consisting of a casing, an impeller housed within the casing, and a motor that drives the impeller. When the impeller rotates, a negative pressure suction is generated at the center of the fan, drawing the cooking fumes from below into the fan. After being accelerated by the fan, the fumes are collected by the casing and guided outwards.

[0003] Existing range hoods often employ a top-side dual-suction design, where the side suction inlet is closer to the smoke source and is typically the main inlet. The top suction inlet usually uses a perforated or mesh suction to remove remaining fumes. Top-side dual-suction range hoods generally present a "7" shape when viewed from the side. However, this arrangement of only two suction inlets is insufficient to guarantee effective fume extraction. Therefore, the side suction inlet usually has a baffle plate to increase the negative pressure area, making the "7" shape resemble an "F" shape when in operation. For example, Chinese Patent Application No. 201711002375.1 discloses a range hood comprising a smoke collection mechanism, a fan mechanism located at the outlet of the smoke collection mechanism, and an oil cup located at the lower end of the smoke collection mechanism. The smoke collection mechanism includes a smoke hood, a vertical plate, a curved panel, a side plate, a baffle plate, a lifting drive mechanism, a fume sensor, a baffle plate, and a tilting drive mechanism. The lifting drive mechanism drives the baffle plate, and the tilting drive mechanism drives the baffle plate.

[0004] However, this type of range hood has a baffle plate and a baffle plate respectively to allow the top and side suction vents to close when not in use. When open, the side suction vent has a baffle plate (flip plate), which intercepts the fumes before they are sucked away by the top suction vent, resulting in poor suction efficiency from the top suction vent. Furthermore, because the fumes need to flow along the front end of the flip plate before rising, smoke can escape from the front of the flip plate, affecting the suction effect and potentially flowing onto the user's face, impacting the user experience. In addition, to accommodate the cabinetry design of this type of range hood, its depth is usually not as wide as traditional top-mounted range hoods. Therefore, in situations with heavy fumes, if the side suction vents cannot remove most of the fumes, relying on the top suction vent for auxiliary smoke intake, fumes can easily escape from the front.

[0005] In addition, there is also a type of range hood, such as the baffle linkage device and range hood disclosed in Chinese Patent Application No. 202311393225.3. The baffle linkage device includes: a first baffle, a second baffle, and a linkage mechanism. The first baffle opens and closes the upper smoke inlet on the top surface of the smoke collection hood by rotating; the second baffle opens and closes the side smoke inlet on the front of the smoke collection hood by sliding; the linkage mechanism is connected to the first baffle and the second baffle respectively, and is used to drive the first baffle and the second baffle to move synchronously, so that the upper smoke inlet and the side smoke inlet open or close synchronously.

[0006] However, when this type of range hood is in operation, the second baffle is located in front of the side smoke inlet, which also blocks the smoke and affects the smoke intake of the top smoke inlet. It also takes up cooking space and obstructs the view. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to address the shortcomings of the prior art by providing a range hood that improves the overall consistency of the machine when it is off and improves the smoke extraction effect when it is on.

[0008] The technical solution adopted by the present invention to solve the above-mentioned technical problem is as follows: a range hood, comprising a lower housing and a smoke baffle, wherein the front of the lower housing includes:

[0009] A first panel extending from front to back, the first panel having a first smoke inlet, and the smoke baffle capable of opening and closing the first smoke inlet; and

[0010] The second panel extends downward from the rear end of the first panel, and the second panel is provided with a second smoke inlet;

[0011] Its features are:

[0012] The range hood also includes a lower slide plate, which can open and close the second smoke inlet. When the lower slide plate is in the open state, the lower slide plate is located in the lower housing.

[0013] By setting up a smoke baffle and a lower slide plate, the corresponding smoke inlets can be closed when the machine is turned off. When the machine is turned on, the second smoke inlet of the side suction no longer has a flap or baffle protruding. Instead, the lower slide plate is located in the lower box, which avoids cutting off the oil fumes at the second smoke inlet of the side suction and ensures normal smoke intake at the first smoke inlet at the top.

[0014] Furthermore, to facilitate the opening and closing of the second smoke inlet using the lower sliding plate, the lower sliding plate can slide up and down and back and forth relative to the lower housing.

[0015] Furthermore, to facilitate the sliding of the slide plate up and down and back and forth, the range hood also includes a motion mechanism. The motion mechanism includes a longitudinal groove extending in the vertical direction and a transverse groove extending forward from the bottom of the longitudinal groove, which are disposed in the lower housing. The slide plate can slide and engage with the longitudinal groove and the transverse groove.

[0016] Furthermore, in order to ensure stable sliding of the sliding plate, the lower housing is provided with two vertically arranged sliding grooves, each of which includes a longitudinal groove and a transverse groove. The sliding plate is provided with a bracket, which has two vertically arranged lugs, each of which cooperates with one of the sliding grooves.

[0017] Furthermore, in order to ensure stable sliding of the lower slide plate, the height between the two lugs and the corresponding slide grooves is d2, the height difference between the two transverse grooves is d3, and d2 = d3 is satisfied, so that the two slide grooves are aligned vertically.

[0018] Furthermore, the thickness of the lower slide plate is d1, the height of the longitudinal groove is d4, and the depth of the transverse groove is d5, satisfying d5≥d1 and d4<d2, thereby providing sufficient forward and backward sliding travel for the lower slide plate and avoiding interference between the upper and lower slide grooves.

[0019] Preferably, the smoke baffle can be rotated relative to the lower housing, and the sliding plate can slide up and down and back and forth relative to the lower housing.

[0020] Furthermore, to simplify the structure and reduce costs, the range hood also includes a motion mechanism for driving the smoke baffle and the lower sliding plate in a coordinated manner. The motion mechanism includes a first link, a second link, a third link, and a fourth link. The fourth link is rotatably connected to the lower housing and fixed to the smoke baffle. One end of the first link is rotatably connected to the fourth link, and the other end of the first link is rotatably connected to the second link. One end of the second link is rotatably connected to the lower housing, and the other end of the second link is rotatably connected to one end of the third link. The other end of the third link is rotatably connected to the lower sliding plate. The second link is located behind the fourth link.

[0021] Furthermore, the range hood also includes an oil guiding assembly, which includes a first filter plate, a second filter plate, a baffle, and an oil guiding plate. The first filter plate extends rearward from the rear edge of the first smoke inlet to the rear of the second panel. The front end of the second filter plate is rotatably connected to the two ends of the first connecting rod. The rear end of the second filter plate is slidably connected to the first filter plate and can slide along the front-rear extension direction of the second filter plate. The baffle is attached to the upper surface of the first filter plate and moves synchronously with the second filter plate. The oil guiding plate is located behind the lower slide plate and moves synchronously with the second filter plate.

[0022] By setting up an oil guiding component, the lower slide plate can be prevented from being located in the main oil passage inside the lower housing. At the same time, the oil guiding component can also increase or decrease the size of the air duct for the oil fumes entering from the second smoke inlet to rise upwards, so as to distribute the flow between the first smoke inlet and the second smoke inlet to adapt to different cooking operations.

[0023] Furthermore, the range hood also includes an oil guiding assembly, which comprises a baffle and an oil guiding plate. When the lower slide plate is in the open second smoke inlet state, the baffle is located above the lower slide plate, and the oil guiding plate is located behind the lower slide plate. By setting up the oil guiding assembly, the lower slide plate can be prevented from being located in the main oil passage inside the lower housing.

[0024] Furthermore, the range hood also includes a first filter plate, which extends rearward from the rear edge of the first smoke inlet to behind the second panel. The baffle can slide along the front-rear extension direction of the first filter plate, and the oil guide plate can slide back and forth. The oil guide assembly can also increase or decrease the size of the air duct for the rising fumes entering from the second smoke inlet, so as to distribute the flow rate between the first and second smoke inlets to adapt to different cooking operations.

[0025] Furthermore, the first filter plate gradually slopes downwards from front to back. The oil guide plate includes a first oil guide plate extending downwards from below the first filter plate and a second oil guide plate extending downwards and gradually forwards from the lower end of the first oil guide plate. The height between the rear end of the first filter plate and the bottom of the lower housing is b2, the height of the first oil guide plate is c2, the height of the second oil guide plate extending downwards is c3, the angle between the second oil guide plate and the vertical direction is α2, and the second oil guide plate satisfies the following relationship: 1 / 2*b2≤c2+c3*sinα2≤2 / 3*b2.

[0026] Therefore, the oil guide assembly can better play the role of compressing or increasing the side air intake channel. If c2+c3*sinα2 is too small, it will result in a smaller effect of regulating the air duct. If c2+c3*sinα2 is too large, it will increase the smoke intake resistance of the second smoke inlet 221 and excessively compress the smoke intake ratio of the second smoke inlet 221.

[0027] Compared with the prior art, the advantages of the present invention are: by setting a smoke baffle and a lower slide plate, the corresponding smoke inlets can be closed when the machine is turned off, and when the machine is turned on, the second smoke inlet of the side suction no longer has a flap or baffle protruding, but the lower slide plate is located in the lower box, which avoids the oil smoke being cut off at the second smoke inlet of the side suction and ensures normal smoke intake at the first smoke inlet at the top. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the closed state of the range hood according to an embodiment of the present invention;

[0029] Figure 2 This is a cross-sectional view of the range hood in the closed state according to an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram showing the closed state of the range hood, which conceals the upper housing, fan, lower housing, and oil cup, according to an embodiment of the present invention.

[0031] Figure 4 This is a cross-sectional view of the range hood during the opening process according to an embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the range hood in the open state according to an embodiment of the present invention;

[0033] Figure 6 This is a cross-sectional view of the range hood in the open state according to an embodiment of the present invention;

[0034] Figure 7 This is a schematic diagram showing the closed state of the range hood, which conceals the upper housing, fan, lower housing, and oil cup, according to an embodiment of the present invention.

[0035] Figure 8 This is a side view of the oil guiding assembly of a range hood according to an embodiment of the present invention;

[0036] Figure 9 This is an exploded structural diagram of the lower slide plate and oil guiding assembly of the range hood according to an embodiment of the present invention. Detailed Implementation

[0037] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions.

[0038] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Since the embodiments disclosed in this invention can be arranged in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0039] See Figures 1 to 7 A range hood includes an upper housing 1, a lower housing 2, and a fan 3 disposed within the upper housing 1.

[0040] The front of the lower housing 2 includes a first panel 21 and a second panel 22. The first panel 21 extends from front to back, and the second panel 22 extends downward from the rear end of the first panel 21. The first panel 21 can gradually slope downward from front to back, while the second panel 22 can be vertical. A first smoke inlet 211 is provided on the first panel 21, constituting a top smoke inlet, and a second smoke inlet 221 is provided on the second panel 22, constituting a side smoke inlet, thereby forming a top-and-side dual-suction range hood.

[0041] The range hood also includes a smoke baffle 41 and a sliding plate 42, which are movable relative to the lower housing 2. When the range hood is in the off state, the first smoke inlet 211 is closed by the smoke baffle 41, and the second smoke inlet 221 is closed by the sliding plate 42. (See [reference]) Figure 1 and Figure 2 When the range hood is turned on, the baffle plate 41 can open the first smoke inlet 211, and the sliding plate 42 can open the second smoke inlet 221, participating in... Figure 5 and Figure 6 Preferably, the lower edge of the sliding plate 42 is not lower than the upper edge of the second smoke inlet 221, such as... Figure 6 The image shown is of level.

[0042] The lower housing 2 also includes a third panel 23 and a top plate 24. The third panel 23 extends upward from the front end of the first panel 21 to the top plate 24, and the upper housing 1 is connected to the top plate 24.

[0043] The smoke baffle 41 and the sliding plate 42 can be driven independently, causing their respective panels to flip or slide, thereby opening and closing the corresponding smoke inlets. Alternatively, as shown in this embodiment, the smoke baffle 41 and the sliding plate 42 are linked. For this purpose, the range hood also includes a motion mechanism disposed in the lower housing 2. The motion mechanism includes a drive mechanism and a transmission mechanism. The transmission mechanism includes a first connecting rod 521, a second connecting rod 522, a third connecting rod 523, and a fourth connecting rod 524. The fourth connecting rod 524 is preferably a crank, one end of which is rotatably connected to the lower housing 2, while the other end is fixed to the back of the smoke baffle 41 facing the lower housing 2.

[0044] One end of the first link 521 is rotatably connected to the fourth link 524, while the other end is rotatably connected to the second link 522. The first link 521 is positioned between the two ends of the fourth link 524. One end of the second link 522 is rotatably connected to the lower housing 2, and the other end is rotatably connected to one end of the third link 523. The second link 522 is L-shaped, and the first link 521 is connected to the bend of the second link 522, facilitating the first link 521 to push the second link 522. The second link 522 is located behind the fourth link 524.

[0045] The motion mechanism also includes a first slide groove 531 and a second slide groove 532 disposed within the lower housing 2. Two sets of the first slide groove 531 and the second slide groove 532 can be provided, respectively disposed on the left and right sides of the lower housing 2. The first slide groove 531 is disposed above the second slide groove 532. The two slide grooves have the same shape and are approximately L-shaped. Each slide groove includes a longitudinal groove 533 extending vertically and a transverse groove 534 extending forward from the bottom of the longitudinal groove 533. The longitudinal groove 533 and the transverse groove 534 are connected. The first slide groove 531 and the second slide groove 532 are arranged completely aligned, that is, the two longitudinal grooves 533 are aligned vertically, and the rear and front ends of the two transverse grooves 534 are aligned vertically.

[0046] Supports 421 are provided on both sides of the sliding plate 42, and the supports 421 are slidably engaged with the first slide groove 531 and the second slide groove 532 respectively. The end of the third link 523 of the above-mentioned transmission mechanism away from the second link 522 is also rotatably connected to the support 421 and slidably engaged with the first slide groove 531.

[0047] The bracket 421 has two vertically arranged lugs 422, each lug 422 engaging with one of the sliding grooves. The thickness of the lower slide plate 42 is d1, the height between the lugs 422 and their respective sliding grooves is d2, and the height difference between the two transverse grooves 534 is d3, satisfying d2=d3, meaning the first and second sliding grooves 531 and 532 are vertically aligned. The height of the longitudinal groove 533 is d4, and the depth of the transverse groove 534 is d5, providing space for the horizontal displacement of the lower slide plate 42, satisfying d5≥d1; furthermore, d4<d2 is also satisfied, ensuring that the two sliding grooves do not interfere with each other in the vertical direction.

[0048] All the aforementioned rotating connections have their rotation axes extending along the width direction of the range hood. The width direction of the range hood refers to the left-right direction when the user is facing the range hood in its normal installation state. (See [reference needed]). Figure 1 As indicated by arrow X in the diagram. Furthermore, preferably, each rotary connection is a hinge.

[0049] The driving mechanism is not shown in this embodiment. It can be a motor or an electric push rod that drives the fourth link 524 to rotate. This driving method is the same as the driving method of the smoke baffle of the existing commonly used side-suction range hood.

[0050] Therefore, see Figure 3 When the range hood is off, the end of the third connecting rod 523 that connects to the bracket 421 of the lower sliding plate 42 is located at the front end of the transverse groove 534 of the first sliding groove 531, and the position where the bracket 421 mates with the second sliding groove 532 is also located at the front end of its transverse groove 534. See also Figure 2 , Figure 4 and Figure 6 When the range hood is started from the off state, the fourth link 524 rotates clockwise from the perspective shown in the figure, pushing the smoke baffle 41 forward. At the same time, the first link 521 is pushed backward and upward (towards the end connected to the second link 522). The second link 522 rotates counterclockwise around the point connected to the lower housing 2 from the perspective shown in the figure, causing the third link 523 to be pulled upward. This pulls the bracket 421 upward, which slides upward along the first slide groove 531 and the second slide groove 532, sliding into the inside of the second smoke inlet 221, i.e., inside the lower housing 2. Thus, the opening of the two smoke inlets is completed. Moreover, since the lower slide plate 42 is located inside the lower housing 2 in the open state, the smoke does not need to pass over the conventional smoke baffle before being sucked away (no smoke baffle to separate it), and the smoke extraction process is continuous.

[0051] In this embodiment, the motion mechanism achieves the linkage between the smoke baffle 41 and the lower slide plate 42 through a simple transmission mechanism, which can reduce costs.

[0052] The height difference between the top of the lower housing 2 and the front end of the first panel 21 (i.e., the height of the third panel 23) is L1. Optionally, L1 can be in the range of 50mm-70mm, just enough to provide space for the fourth connecting rod 524. The maximum depth of the lower housing 2 (the depth of the top plate 24) is L2, and L2≥325mm. The depth of the bottom of the lower housing 2 is L4, and L4≥110mm, just enough to accommodate the moving mechanism inside the lower housing 2 and ensure that its entire stroke does not interfere with the lower housing 2 in the vertical direction. The height of the lower housing 2 is L3, and L3≥360mm. This height is to ensure that the lower slide plate 42 is concealed when powered off and when powered on within the lower housing 2.

[0053] The width of the first panel 41 along its inclined direction is L6. The smoke baffle 41 is inclined in the same direction as the first panel 41 and its width along its inclined direction is L7. The height of the second panel 42 is L5, and the height of the lower slide plate 42 is L8, satisfying that: L5 > 2 * L8. When the machine is off, the lower slide plate 42 (second smoke inlet 221) is located in the lower half of the second panel 22. With this arrangement, both smoke inlets on the top side are closed when the machine is off, which can improve the overall appearance and refinement of the machine.

[0054] As can be seen from the above, the sliding plate 42 enters the lower housing 2 when the range hood is turned on, thus the sliding plate 42 is located in the main oil circuit when the range hood is working. Therefore, the range hood also includes an oil guiding component to guide the oil flowing down or dripping from the sliding groove 42 to prevent it from accumulating on the sliding plate 42.

[0055] See Figure 2 , Figure 3 , Figures 6-9 The oil guiding assembly includes a first filter plate 61, a second filter plate 62, a baffle 63, and oil guiding plates (first oil guiding plate 64 and second oil guiding plate 65). The first filter plate 61 can be attached to the inner surface of the first panel 21 facing the lower housing 2, and extends rearward from the rear edge of the first smoke inlet 211 to the rear of the second panel 22, as in this embodiment, extending to the rear side wall of the lower housing 2. The first filter plate 61 is fixed relative to the lower housing 2. The front end of the second filter plate 62 is rotatably connected to the two ends of the first connecting rod 521, and the axis of the rotatable connection extends along the width direction of the range hood. Preferably, the two are hinged. The rear end of the second filter plate 62 is slidably connected to the first filter plate 61, sliding along the front-rear extension direction of the second filter plate 62. For example, a third sliding groove 611 can be provided on the first filter plate 61 to allow slidable connection with the second filter plate 62. The baffle 63 is attached (with only a movement gap) to the upper surface of the first filter plate 61. It can be formed by bending forward from the rear end of the second filter plate 62, or it can be connected and fixed to the second filter plate 62 as a whole, so as to move synchronously.

[0056] The first oil guide plate 64 and the second oil guide plate 65 are located behind the second panel 22 and below the first filter plate 61. The first oil guide plate 64 can extend vertically, and the second oil guide plate 65 extends downward and gradually forward from the lower end of the first oil guide plate 64. The top of the first oil guide plate 64 can be integrated with the second filter plate 62 through the third groove 611. The second filter plate 62, the first oil guide plate 64, and the second oil guide plate 65 can be three parts connected and fixed together, or they can be a single piece of plate.

[0057] Therefore, see Figure 2When the range hood is off, the baffle 63 mainly corresponds to the front side of the second panel 22 (it can be projected onto the same horizontal plane to distinguish the front and back). Figure 6 When the range hood is turned on, the second filter plate 62 is driven by the first connecting rod 521, and its rear end slides backward relative to the first filter plate 61, causing the baffle 63 to slide backward until it mainly corresponds to the rear side of the second panel 22. During this process, the sliding stroke is S1.

[0058] When the range hood is turned on, the baffle 63 is located above the lower slide plate 42, while the first oil guide plate 64 and the second oil guide plate 65 are located behind the lower slide plate 42, thus preventing the lower slide plate 42 from being exposed to the oil path. The lower end of the second oil guide plate 65 can be lower than the upper edge of the second smoke inlet 221, and its inclined setting can play a role in guiding the flow.

[0059] Since the baffle 63 and the oil guide plate move both forward and backward and up and down, the baffle 63 can increase or decrease the area of ​​the first filter plate 61, and the oil guide plate can move closer or further away from the second smoke inlet 221. This can compress or increase the upward flow of oil fumes after entering the second smoke inlet 221, thereby adjusting the ratio of smoke entering the two smoke inlets on the top side.

[0060] In the open state, the width between the rear edge of the first smoke inlet 211 and the front edge of the baffle 63 is b4, and the width of the baffle 63 extending along the front-rear direction of the range hood is c1, satisfying S1≤c1≤b4; the angle between the baffle 63 and the horizontal direction is α1, and the angle between the first panel 21 and the horizontal direction is β1, satisfying: α1=β1. The angle between the second oil guide plate 65 and the vertical direction is α2. To better guide the flow and prevent interference with the lower housing 2 when the entire unit is closed, the following relationships must be satisfied: 20°≤α2≤50°, c3*cosα2≥S1*sinα1, where c3 is the height of the second oil guide plate 65 extending from top to bottom.

[0061] The height between the rear end of the first filter plate 61 and the bottom of the lower housing 2 is b2, and the height of the first oil guide plate 64 is c2, satisfying the following relationship: 1 / 2*b2≤c2+c3*sinα2≤2 / 3*b2. This allows the oil guide assembly to better compress or enlarge the side air intake channel. If c2+c3*sinα2 is too small, its effect on regulating the air duct will be less; if c2+c3*sinα2 is too large, it will increase the smoke intake resistance of the second smoke inlet 221, excessively compressing the smoke intake ratio of the second smoke inlet 221.

[0062] The aforementioned smoke baffle 41, lower slide plate 42, oil guiding component, and fan 3 can all be controlled by a voice module. A controller, voice receiving module, and voice parsing module can be installed on the range hood. The voice receiving module receives user commands, and the voice parsing module parses the commands. Based on the parsed commands, the controller controls the corresponding drive mechanisms of the smoke baffle 41, lower slide plate 42, oil guiding component, and fan 3 to perform corresponding operations, thereby realizing intelligent control of the range hood and improving the user experience.

Claims

1. A range hood comprising a lower cabinet (2) and a smoke baffle (41), the front face of the lower cabinet (2) comprising: a first panel (21) extending from front to back, the first panel (21) being provided with a first smoke inlet (211), the smoke baffle (41) being capable of opening and closing the first smoke inlet (211); and a second panel (22) extending downward from the rear end of the first panel (21), the second panel (22) being provided with a second smoke inlet (221); characterized in that: the range hood further comprises a lower slide plate (42), the lower slide plate (42) being capable of opening and closing the second smoke inlet (221), the lower slide plate (42) being located in the lower cabinet (2) when the lower slide plate (42) is in a state of opening the second smoke inlet (221). the lower slide plate (42) is capable of sliding up and down and front and back relative to the lower cabinet (2).

2. The hood according to claim 1, characterized in that: the range hood further comprises a movement mechanism, the movement mechanism comprising a longitudinal slot (533) extending in the up and down direction and provided in the lower cabinet (2) and a transverse slot (534) extending forward from the bottom of the longitudinal slot (533), the lower slide plate (42) being capable of slidingly engaging the longitudinal slot (533) and the transverse slot (534).

3. The hood according to claim 2, characterized in that: the lower cabinet (2) is provided with two slide grooves arranged in the up and down direction, each slide groove comprising the longitudinal slot (533) and the transverse slot (534), the lower slide plate (42) being provided with a bracket (421), the bracket (421) having two bracket ears (422) arranged in the up and down direction, each bracket ear (422) engaging one of the slide grooves.

4. The hood according to claim 3, characterized in that: the height between the two bracket ears (422) engaging the corresponding slide grooves is d2, the height difference between the two transverse slots (534) is d3, and d2 = d3 is satisfied, so that the two slide grooves are aligned in the up and down direction.

5. The hood according to claim 4, characterized in that: the thickness of the lower slide plate (42) is d1, the height of the longitudinal slot (533) is d4, and the depth of the transverse slot (534) is d5, and d5 ≥ d1 and d4 < d2 are satisfied.

6. The hood according to claim 5, characterized in that: the smoke baffle (41) is capable of being flipped relative to the lower cabinet (2), and the lower slide plate (42) is capable of sliding up and down and front and back relative to the lower cabinet (2).

7. The hood according to claim 1, characterized in that: the range hood further comprises a movement mechanism for driving the smoke baffle (41) and the lower slide plate (42) to move in linkage, the movement mechanism comprising a first connecting rod (521), a second connecting rod (522), a third connecting rod (523), and a fourth connecting rod (524), the fourth connecting rod (524) being rotatably connected to the lower cabinet (2) and fixed to the smoke baffle (41), one end of the first connecting rod (521) being rotatably connected to the fourth connecting rod (524), the other end of the first connecting rod (521) being rotatably connected to the second connecting rod (522), one end of the second connecting rod (522) being rotatably connected to the lower cabinet (2), the other end of the second connecting rod (522) being rotatably connected to one end of the third connecting rod (523), the other end of the third connecting rod (523) being rotatably connected to the lower slide plate (42), and the second connecting rod (522) being located at the rear side of the fourth connecting rod (524).

8. The hood according to claim 7, characterized in that: ​ 9. The hood according to claim 8, characterized in that: The range hood further comprises an oil guiding assembly, the oil guiding assembly comprises a first filter screen plate (61), a second filter screen plate (62), a baffle (63) and an oil guiding plate, the first filter screen plate (61) extends backward from a position behind the rear side edge of the first smoke inlet (211) to behind the second panel (22), the front side end of the second filter screen plate (62) is rotationally connected with a position between the two ends of the first connecting rod (521), the rear side end of the second filter screen plate (62) is slidingly connected with the first filter screen plate (61) and can slide along the front-rear extension direction of the second filter screen plate (62), the baffle (63) is attached to the upper surface of the first filter screen plate (61) and moves synchronously with the second filter screen plate (62), and the oil guiding plate is located at the rear side of the lower sliding plate (42) and moves synchronously with the second filter screen plate (62).

10. The hood according to claim 1, characterized in that: The range hood further comprises an oil guiding assembly, the oil guiding assembly comprises a baffle (63) and an oil guiding plate, when the lower sliding plate (42) is in a state of opening the second smoke inlet (221), the baffle (63) is located above the lower sliding plate (42), and the oil guiding plate is located at the rear side of the lower sliding plate (42).

11. The hood according to claim 10, characterized in that: The range hood further comprises a first filter screen plate (61), the first filter screen plate (61) extends backward from a position behind the rear side edge of the first smoke inlet (211) to behind the second panel (22), the baffle (63) can slide along the front-rear extension direction of the first filter screen plate (61), and the oil guiding plate can slide forward and backward.

12. The hood according to claim 11, characterized in that: The first filter screen plate (61) gradually inclines downward from front to back, the oil guiding plate comprises a first oil guiding plate (64) extending downward from the lower end of the first filter screen plate (61) and a second oil guiding plate (65) extending downward and gradually forward from the lower end of the first oil guiding plate (64), the height between the rear side end of the first filter screen plate (61) and the bottom of the lower cabinet (2) is b2, the height of the first oil guiding plate (64) is c2, the height of the second oil guiding plate (65) extending downward from top to bottom is c3, the included angle between the second oil guiding plate (65) and the vertical direction is α2, and the second oil guiding plate (65) satisfies the following relationship: 1 / 2*b2≤c2+c3*sinα2≤2 / 3*b2.

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