A range hood

Abstract

The application discloses an oil fume extractor, which comprises an air inlet assembly and an upper box body. The bottom of the upper box body is provided with an air inlet. The air inlet assembly further comprises a back plate extending downward from the bottom of the upper box body, and a smoke gathering plate, which comprises a smoke blocking plate and a baffle. In the closed state, the baffle closes the air inlet, and the smoke blocking plate is close to the front surface of the back plate. In the open state, the baffle opens the air inlet, and the smoke gathering plate and the front surface of the back plate form a smoke gathering cavity. The air inlet is located at the top of the smoke gathering cavity, and the position of the smoke blocking plate is in front of the position in the closed state. Compared with the prior art, the oil fume extractor has the advantages that the air inlet is closed in the off state and opened in the working state through the smoke gathering plate, and the smoke blocking plate can form the smoke gathering cavity with the back plate when being turned up, so that the smoke gathering area is expanded. When being closed, the smoke blocking plate moves backward until being close to the wall surface. On the premise of ensuring the structural strength, the oil fume extractor can be extremely light and thin.

Description

[0001] This invention claims priority to Chinese Patent Application No. 202211324451.1, filed on October 27, 2022, entitled "A Range Hood". Technical Field

[0002] This invention relates to mechanical mounting structures, and more particularly to a range hood. Background Technology

[0003] Range hoods have become an indispensable kitchen appliance in modern homes. They operate on the principles of fluid dynamics, using a centrifugal fan inside to draw in cooking fumes and a filter to remove some grease particles. The centrifugal fan consists of a casing, an impeller housed within the casing, and a motor that drives the impeller. As the impeller rotates, a negative pressure is generated at the center of the fan, drawing in the cooking fumes from below. After being accelerated by the fan, the fumes are collected by the casing and guided outdoors.

[0004] Due to limited kitchen space, a thin range hood has been developed to improve space utilization. For example, Chinese Patent Application No. 201420538159.4 discloses a novel ultra-thin range hood with a fan box and a fume extraction chamber. The fume extraction chamber is located directly below and connected to the fan box, and is flush against the wall. The front panel of the fume extraction chamber gradually slopes towards the wall from top to bottom. Another example is Patent Application No. 2018207758. Chinese Patent No. 51.7 discloses an ultra-thin bottom-suction range hood, including a blower box and a smoke collection hood. The smoke collection hood is located directly below the blower box and is connected to the blower box. The blower box is a three-dimensional columnar cabinet shape, and the smoke collection hood is a rectangular flat plate with a hollow interior, the width of which is greater than its height. The lower side of the smoke collection hood has a hidden air inlet along its long edge. The smoke collection hood is equipped with a smoke guide plate, which is located directly above the hidden air inlet. The smoke guide plate forms an angle of 45°-60° with the front wall of the smoke collection hood cavity.

[0005] As can be seen from the above, existing thin range hoods, whether they are designed to draw air from the front to form a near-suction type or from the bottom to form a low-suction type, must retain an air intake channel against the wall. In order to ensure the smoke extraction effect, the air intake channel should not be too small, resulting in the exposed part of the range hood still having a large thickness. Summary of the Invention

[0006] 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 reduces the space occupied by the exposed parts of the range hood and improves space utilization while ensuring the smoke extraction effect.

[0007] The technical solution adopted by the present invention to solve the above-mentioned technical problem is as follows: a range hood, comprising an air inlet assembly and an upper housing, wherein an air inlet is provided at the bottom of the upper housing, characterized in that: the air inlet assembly further comprises:

[0008] The lower housing has a back panel extending downward from the bottom of the upper housing;

[0009] A smoke collection panel, comprising a smoke baffle and a baffle, having a closed state and an open state:

[0010] When closed, the baffle closes the air inlet, and the smoke baffle is close to the front of the back panel;

[0011] When in the open state, the baffle opens the air inlet, and a smoke-collecting cavity is formed between the smoke-collecting plate and the front of the back plate. The air inlet is located at the top of the smoke-collecting cavity, and the position of the smoke baffle is in front of the position when in the closed state.

[0012] By opening and closing the smoke-collecting plate, the air inlet can be closed when the machine is off and opened when it is working. At the same time, when the smoke baffle is flipped up, it can be pushed forward to form a smoke-collecting cavity with the back panel, expanding the smoke-collecting area and ensuring good smoke extraction effect. When closed, the smoke baffle moves backward until it is close to the back panel (wall). Under the premise of ensuring structural strength, there is no need to form a fixed internal cavity air intake channel, which can achieve an extremely thin and light design, reducing the space occupied by the exposed part of the range hood and improving space utilization.

[0013] Preferably, the smoke baffle is rotatably connected to the baffle, thereby enabling the other baffle to move in tandem when only one baffle is driven, which simplifies the structure.

[0014] To achieve the maximum air intake area and smoke collection area, the baffle is rotatably connected to the upper housing on the front side of the air inlet, and the upper end of the smoke baffle is rotatably connected to the free end of the baffle. The free end of the baffle is the rear end of the baffle when the air inlet is closed.

[0015] According to an embodiment of the present invention, the range hood further includes a motion mechanism for driving the smoke baffle and the baffle to move together. The motion mechanism includes a drive mechanism and a transmission mechanism. The drive mechanism is a rotation drive module. The transmission mechanism includes a first connecting rod driven to rotate by the rotation drive module. One end of the first connecting rod is rotatably connected to the inner side of the upper housing, and the other end of the first connecting rod is fixed to the smoke baffle. The rotation axis of the first connecting rod extends in the left-right direction.

[0016] According to another embodiment of the present invention, the range hood further includes a motion mechanism for driving the smoke baffle and the baffle to move together. The motion mechanism includes a drive mechanism and a transmission mechanism. The drive mechanism is a rotation drive module. The transmission mechanism includes a second connecting rod. One end of the second connecting rod is hinged to the upper housing and the other end is rotatably connected to the smoke baffle. The drive mechanism drives the second connecting rod or the baffle to rotate.

[0017] Furthermore, the air intake assembly also includes an air intake body. In the closed state, the air intake body is hidden in the upper housing. In the open state, the air intake body is located below the air inlet and between the smoke collection plate and the back plate. This allows the air inlet to move downward in the open state, thereby improving the smoke extraction effect.

[0018] Furthermore, the transmission mechanism also includes a third link, which is fixed to the rear side of the smoke baffle and close to the upper end of the smoke baffle. The second link is rotatably connected to the smoke baffle by hinged to the end of the third link away from the smoke baffle. The air inlet is hinged to the third link and constrained to the rear side of the upper and lower housings on the side away from the smoke baffle, thereby facilitating the linkage between the air inlet and the smoke baffle.

[0019] Preferably, the structure of the air inlet is as follows: the air inlet includes two first partitions arranged at left and right intervals, the distance between the two first partitions is adapted to the length of the air inlet in the left and right direction, and the space formed between the first partitions serves as the air inlet channel S through which the oil fume airflow passes.

[0020] Furthermore, the air inlet also includes a connecting plate connected between the first partition and the side away from the smoke baffle. The first partition and the connecting plate are fixed. Vertically extending guide rails are provided on the rear sides of the upper and lower housings. The connecting plate can slide and rotate relative to the guide rails. Thus, the movement trajectory of the air inlet can be constrained by the cooperation of the connecting plate and the guide rails.

[0021] To prevent pressure loss between the left and right sides of the air inlet and the bottom of the air inlet, a second partition corresponding to the first partition is provided on the baffle. When the baffle is open, the first and second partitions cooperate to seal the space between the left and right sides of the air inlet and the bottom of the upper box.

[0022] Compared with the prior art, the advantages of this invention are as follows: By opening and closing the smoke-collecting plate, the air inlet can be closed in the off state and opened in the working state. At the same time, the smoke baffle can be pushed forward when flipped up to form a smoke-collecting cavity with the back plate, expanding the smoke-collecting area and ensuring good smoke extraction effect. When closed, the smoke baffle moves backward until it is close to the back plate (wall). Under the premise of ensuring structural strength, there is no need to form a fixed internal cavity air inlet channel, which can achieve an extremely thin and light design, reducing the space occupied by the exposed part of the range hood and improving space utilization. Through the rotational connection of the baffle and the smoke baffle, the depth in the front and back direction is reduced in the closed state, and the length of the smoke baffle can be extended in the open state, that is, the smoke-collecting area is expanded and the smoke extraction effect is improved. By setting the air inlet body, the air inlet can be moved downward, so that the negative pressure zone is closer to the smoke source, thereby further improving the smoke extraction effect. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the closed state of the range hood according to the first embodiment of the present invention;

[0024] Figure 2 for Figure 1 A cross-sectional view of a range hood;

[0025] Figure 3 for Figure 2 A magnified schematic diagram of part I;

[0026] Figure 4 for Figure 1 A schematic diagram of the smoke baffle, baffle and its moving mechanism of a range hood;

[0027] Figure 5 This is a schematic diagram of the open intermediate state of the range hood according to the first embodiment of the present invention;

[0028] Figure 6 for Figure 5 A cross-sectional view of a range hood;

[0029] Figure 7 This is a schematic diagram of the range hood in the open state according to the first embodiment of the present invention;

[0030] Figure 8 for Figure 7 A cross-sectional view of a range hood;

[0031] Figure 9 This is a schematic diagram of the smoke baffle, baffle and its moving mechanism of the range hood according to the second embodiment of the present invention;

[0032] Figure 10 This is a schematic diagram of the smoke baffle, baffle and its moving mechanism of the range hood according to the third embodiment of the present invention;

[0033] Figure 11 This is a schematic diagram of the closed state of the range hood according to the fourth embodiment of the present invention;

[0034] Figure 12 This is a cross-sectional view of the range hood in the closed state according to the fourth embodiment of the present invention;

[0035] Figure 13 This is a schematic diagram of the guide rail, smoke baffle, baffle and its movement mechanism in the closed state of the range hood according to the fourth embodiment of the present invention;

[0036] Figure 14 for Figure 13 A schematic diagram of the decomposed structure;

[0037] Figure 15 This is a schematic diagram of an intermediate state of the range hood according to the fourth embodiment of the present invention;

[0038] Figure 16 This is a cross-sectional view of the range hood according to the fourth embodiment of the present invention in an intermediate state;

[0039] Figure 17 This is a schematic diagram of the range hood in the open state according to the fourth embodiment of the present invention;

[0040] Figure 18 This is a cross-sectional view of the range hood in the closed state according to the fourth embodiment of the present invention;

[0041] Figure 19 This is a schematic diagram of the smoke baffle, baffle and its movement mechanism in the open state of the range hood according to the fourth embodiment of the present invention. Detailed Implementation

[0042] 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.

[0043] 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.

[0044] Example 1

[0045] See Figures 1-6 A range hood includes an air intake assembly 1 and an upper housing 2, wherein a fan system 3 is housed within the upper housing 2. In the installed state, the upper housing 2 is concealed within a kitchen cabinet, with its bottom surface flush with the cabinet, except for the air intake assembly 1 which protrudes below the cabinet. Alternatively, the fan system 3 can be housed in another housing connected to the upper housing 2.

[0046] The air intake assembly 1 includes a lower housing 11, a smoke baffle 12, and a baffle 13. The smoke baffle 12 and the baffle 13 constitute a smoke collection plate. An air inlet 21 is provided at the bottom of the upper housing 2 near the rear end, and the air inlet 21 extends in the left-right direction. The fan system 3 is located near the front of the upper housing 2. A filter screen 5 is provided inside the upper housing 2. The filter screen 5 is located above the air inlet 21 and extends forward beyond the air inlet 21. The filter screen 5 gradually slopes downward from front to back. The filter screen 5 is closed at the position corresponding to the fan system 3 without mesh openings. The structure and arrangement of the filter screen 5 can prevent oil droplets from flying out during operation, and at the same time guide the condensed oil in the fan system 3 to the rear side, and collect it in the oil cup 6 located at the bottom of the lower housing 11.

[0047] The lower housing 11 includes a back panel 111, side panels 112, and a top panel 113. The back panel 111 is located below the rear side of the upper housing 2, extending downward from the lower end of the upper housing 2. The top panel 113 is formed by extending forward from the top of the back panel 111. The back panel 111 and the top panel 113 can be independent panels or integral panels. The top panel 113 can be gradually inclined downward from front to back. The width (dimension in the left-right direction) of the back panel 111 is greater than the width of the upper housing 2. The top panel 113 is located on the left and right sides of the upper housing 2. Preferably, the top panel 113 is close to the lower end of the upper housing 2. The side panels 112 are provided on the left and right sides of the top panel 113. Alternatively, the side panels 112 can be provided on the left and right sides of the back panel 111 or on the left and right sides of the smoke baffle 12. Alternatively, the width of the back panel 111 can be equal to the width of the upper box 2. In this case, there is no need to set the top panel 113, and the side panels 112 can still be set on the left and right sides of the back panel 111 or the left and right sides of the smoke baffle 12.

[0048] A smoke baffle 12 is rotatably mounted on the front side of the back panel 111. Its upper end or near the upper end is used for connection, while its lower end is a free end. The axis of rotation extends in the left-right direction, and it serves to collect smoke when open. A baffle 13 is rotatably mounted at the air inlet 21, and its axis of rotation extends in the left-right direction to open and close the air inlet 21. The baffle 13 is rotatably connected to the front side or near the front side of the air inlet 21, and the upper end of the smoke baffle 12 is connected to the free end (the rear end in the closed state) of the baffle 13. When the baffle 13 closes the air inlet 21, it simultaneously closes both the front and rear ends of the top panel 113.

[0049] The smoke baffle 12 and baffle 13 can move independently or in conjunction. In this embodiment, the smoke baffle 12 and baffle 13 move in conjunction. Therefore, the range hood also includes a motion mechanism for driving the smoke baffle 12 and baffle 13 in conjunction. The motion mechanism includes a drive mechanism 41 and a transmission mechanism. The drive mechanism 41 is preferably an electric push rod. The transmission mechanism includes a first connecting rod 421. One end of the first connecting rod 421 is rotatably connected to the inner side of the upper housing 2, and the other end of the first connecting rod 421 is fixed to the smoke baffle 12. The electric push rod (excluding the push rod used for output) is rotatably connected to the upper housing 2, and the push rod of the electric push rod is rotatably connected to the portion between the two ends of the first connecting rod 421. The rotation axis of the first connecting rod 421 extends in the left-right direction. The position where the first connecting rod 421 connects to the upper housing 2 is the rotation center of the smoke baffle 12. The first connecting rod 421 is curved and protrudes backward, thereby avoiding interference with the baffle 13 during movement. The aforementioned rotatable electric actuator constitutes a rotation drive module.

[0050] The components of the aforementioned motion mechanism constitute the driving end of the motion mechanism, which also includes a driven end, which only has a transmission mechanism. The driving end and the driven end are respectively connected to positions arranged at intervals on the left and right sides of the smoke baffle 12.

[0051] The rear end of the baffle 13 is rotatably connected to the upper end of the smoke baffle 12, with the axis of rotation extending in the left-right direction. Slide grooves 131 are provided on both the left and right sides of the baffle 13, and a rotating shaft 132 is provided on the side plate 112 to cooperate with the slide grooves 131. The rotating shaft 132 can also rotate relative to the slide grooves 131. When the widths of the back plate 111 and the upper housing 2 are the same, the rotating shaft 132 can be located inside the upper housing 2. That is, the baffle 13 is rotatably mounted relative to the upper housing 2.

[0052] See Figure 1 and Figure 2 At this time, the range hood is in the off state. The baffle 13 closes the air inlet 21, and the smoke baffle 12 is close to the front of the back panel 111, covering the front of the back panel 111 in a roughly vertical position, and can fit snugly against the back panel 111. The smoke baffle 12 and the baffle 13 are in a folded state. The depth of the air inlet 21 (the dimension in the front-to-back direction) is greater than the distance between the upper end of the back panel 111 and the upper end of the smoke baffle 12, thereby ensuring that the air inlet 21 has a large air intake area when it is open, while the lower housing 11 is thin and light.

[0053] See Figure 5 and Figure 6 The drive mechanism 41 pushes the first link 421 around Figure 6 The counterclockwise rotation shown pushes the smoke baffle 12 outward and flips it, thereby causing the baffle 13 to rotate. The movement trajectory of the baffle 13 is also limited by the cooperation of the rotating shaft 132 and the slide groove 131.

[0054] See Figure 7 and Figure 8 When the smoke baffle 12 is opened to its limit, the baffle 13 and the smoke baffle 12 are in an unfolded state, almost on the same plane. The baffle 13 and the smoke baffle 12 together form a smoke-collecting plate, which lengthens the original smoke baffle 12, allowing for a larger smoke-collecting range. At this time, the smoke baffle 12 is located in front of the position when closed. The smoke baffle 12 and the baffle 13 together with the front of the back plate 111 form a smoke-collecting cavity Q. The concave part 114 also forms part of the smoke-collecting cavity Q. The air inlet 21 is located at the top of the smoke-collecting cavity Q. The smoke-collecting cavity Q is connected to the interior of the upper box 2 through the air inlet 21. The fumes enter the upper box 2 from the rear side of the smoke baffle 12 and the baffle 13 through the air inlet 21.

[0055] This embodiment achieves both an extremely thin profile in the off state and a large air intake channel and a large smoke collection range in the working state by folding and unfolding the baffle 13 at the air inlet of the range hood relative to the smoke baffle 12. This design also eliminates the need for the air intake assembly 1 to form an air intake channel. When closed, the smoke baffle 12 can be close to the back panel 111, making the overall thickness of the air intake assembly 1 extremely thin, preferably around ten millimeters.

[0056] Example 2

[0057] See Figure 9 In this embodiment, the difference from Embodiment 1 is that the drive mechanism 41 uses a motor, and the transmission mechanism further includes a gear 422 and a rack 423. The gear 422 is connected to the output shaft of the motor and can rotate around a left-right extending axis. The gear 422 and the rack 423 mesh, and the rack 423 is fan-shaped with its teeth formed on the arc surface of the fan shape. The rack 423 is fixed to the first connecting rod 421. The motor, gear 422, and rack 423 constitute a rotation drive module.

[0058] Therefore, when the motor starts, the rack 423 can be driven to rotate by the gear 422, which in turn drives the first connecting rod 421 to rotate.

[0059] Example 3

[0060] See Figure 10 In this embodiment, the difference from the second embodiment is that the first connecting rod 421 is directly connected to the output shaft of the motor and is directly driven to rotate by the motor.

[0061] Example 4

[0062] See Figures 11-14 In this embodiment, the difference from the first embodiment is that one end of the baffle 13 is hinged to the lower housing 11, with hinge point A located in front of the air inlet 21. The other end (free end) of the baffle 13 is hinged to the upper end of the smoke baffle 12, with hinge point B. During the opening process, the rotation angle of the baffle 13 is greater than that of the smoke baffle 12. After the machine is turned off, it has a "concave" shape. The free end of the baffle 13 is the rear end of the baffle 13 at this time, which covers the air inlet 21, so that the smoke baffle 12 can be closer to the wall after the machine is turned off, achieving an extremely thin and light design when the machine is turned off. The different rotation angles of the smoke baffle 12 (baffle 13) are achieved through the following motion mechanism.

[0063] The motion mechanism includes a drive mechanism 41 and a transmission mechanism. The transmission mechanism includes a second link 431 and a third link 432. The third link 432 is fixed to the rear side of the smoke baffle 12 and close to the upper end of the smoke baffle 12. One end of the second link 431 is hinged to the upper housing 2 at the hinge point D, and the other end is hinged to the end of the third link 432 away from the smoke baffle 12 at the hinge point C.

[0064] The four hinge points mentioned above refer to points located in the same vertical plane (the plane extending forward and backward). AB, BC, DC, and DA together form a four-bar linkage. The length of the four-bar linkage satisfies the following motion law: During the opening of the smoke baffle, AB and DC rotate in the same direction. See [link to relevant documentation]. Figure 12 , Figure 16 and Figure 18 For counter-clockwise rotation, BC needs to rotate in the same direction as AB and DC, and the rotation angle is smaller. The drive mechanism 41 can act on the second link 431 (DC) or the baffle 13 (AB). In this embodiment, the drive mechanism 41 is an electric push rod that acts on the second link 431 to provide power for the second link 431 to rotate relative to the upper housing 2. The rotation axis extends in the left-right direction.

[0065] The above solution can achieve the advantages of a large smoke collection area, a large air intake area, and a thin profile when closed, but the air inlet 21 is positioned too high, making it difficult to guarantee the smoke extraction effect.

[0066] Therefore, an air inlet 14 is hinged to the lower end of the baffle 13 or the smoke baffle 12. In this embodiment, the air inlet 14 is hinged to the third connecting rod 432. The air inlet 14 includes two first partitions 141 arranged at left and right intervals. The distance between the first partitions 141 is adapted to the length of the air inlet 21 in the left and right direction. The space formed between the first partitions 141 serves as an air inlet channel S for the flow of oil fume. The sides of the first partitions 141 away from the smoke baffle 12 are connected by a connecting plate 142, and the first partitions 141 and the connecting plate 142 are fixed. The side of the connecting plate 142 away from the smoke baffle 12 is slidably connected to the rear side of the upper box 2 and the lower box 11. A vertically extending guide rail 15 is provided on the rear side of the upper box 2 and the lower box 11. The connecting plate 142 is slidably engaged with the guide rail 15 and can rotate relative to the guide rail 15.

[0067] A second partition 131 is provided on the baffle 13, corresponding to the first partition 141.

[0068] See Figure 11 and Figure 12 When closed, the air inlet 14 can be stored inside the upper housing 2, the baffle 13 closes the air inlet 21, and the smoke baffle 12 is close to the back panel 111, covering the front of the back panel 111.

[0069] See Figure 15 and Figure 16 As the smoke baffle 12 and baffle 13 open, the air inlet 14 flips downward, and the connecting plate 142 gradually slides down and flips upward.

[0070] See also Figure 17 and Figure 18 When opened to its limit position, the baffle 13 and the smoke baffle 12 are almost on the same plane, the connecting plate 142 is horizontal or nearly horizontal, and it is located below the air inlet 21. The bottom of the first partition 141 is horizontal or nearly horizontal at this time. Thus, through the air inlet channel S between the first partitions 141, an effect similar to the downward movement of the air inlet (the opening at the bottom of the air inlet channel S is equivalent to a new air inlet) is formed. At the same time, the first partition 141 and the second partition 131 cooperate to seal the space between the left and right sides of the air inlet body 14 and the bottom of the upper box 2 to prevent pressure loss.

Claims

1. A range hood, comprising an air inlet assembly (1) and an upper housing (2), wherein the bottom of the upper housing (2) is provided with an air inlet (21), characterized in that: The air intake assembly (1) also includes: The lower housing (11) has a back plate (111) extending downward from the bottom of the upper housing (2); The smoke collection plate includes a smoke baffle (12) and a baffle (13) that are rotatably connected, and has a closed state and an open state: When closed, the baffle (13) is closed at the air inlet (21), the smoke baffle (12) is close to the front of the back panel (111), and the baffle (13) and the smoke baffle (12) are in a folded state. When in the open state, the baffle (13) opens the air inlet (21), and the baffle (13) and the smoke baffle (12) together form a smoke collection cavity (Q) between the front of the back plate (111). The air inlet (21) is located at the top of the smoke collection cavity (Q), and at this time the smoke baffle (12) is located in front of the position when in the closed state. The baffle (13) and the smoke baffle (12) are in the unfolded state.

2. The range hood according to claim 1, characterized in that: The baffle (13) is rotatably connected to the upper box (2) on the front side of the air inlet (21), and the upper end of the smoke baffle (12) is rotatably connected to the free end of the baffle (13). The free end of the baffle (13) is the rear end of the baffle (13) in the state where the air inlet (21) is closed.

3. The range hood according to claim 1 or 2, characterized in that: The range hood also includes a motion mechanism for driving the smoke baffle (12) and the baffle (13) to move together. The motion mechanism includes a drive mechanism (41) and a transmission mechanism. The drive mechanism (41) is a rotation drive module. The transmission mechanism includes a first connecting rod (421) driven to rotate by the rotation drive module. One end of the first connecting rod (421) is rotatably connected to the inside of the upper housing (2), and the other end of the first connecting rod (421) is fixed to the smoke baffle (12). The rotation axis of the first connecting rod (421) extends in the left and right direction.

4. The range hood according to claim 1 or 2, characterized in that: The range hood also includes a motion mechanism for driving the smoke baffle (12) and the baffle (13) to move together. The motion mechanism includes a drive mechanism (41) and a transmission mechanism. The drive mechanism (41) is a rotation drive module. The transmission mechanism includes a second connecting rod (431). One end of the second connecting rod (431) is hinged to the upper housing (2) and the other end is rotatably connected to the smoke baffle (12). The drive mechanism (41) drives the second connecting rod (431) or the baffle (13) to rotate.

5. The range hood according to claim 4, characterized in that: The air intake assembly (1) also includes an air intake body (14). When closed, the air intake body (14) is hidden in the upper housing (2). When open, the air intake body (14) is located below the air inlet (21) and between the smoke collection plate and the back plate (111).

6. The range hood according to claim 5, characterized in that: The transmission mechanism also includes a third link (432), which is fixed to the rear side of the smoke baffle (12) and close to the upper end of the smoke baffle (12). The second link (431) is rotatably connected to the smoke baffle (12) by hinged to the end of the third link (432) away from the smoke baffle (12). The air inlet (14) is hinged to the third link (432) and constrained to the rear side of the upper box (2) and the lower box (11) on the side away from the smoke baffle (12).

7. The range hood according to claim 6, characterized in that: The air inlet (14) includes two first partitions (141) arranged at left and right intervals. The distance between the two first partitions (141) is adapted to the length of the air inlet (21) in the left and right direction. The space formed between the first partitions (141) serves as the air inlet channel S through which the oil fume airflow passes.

8. The range hood according to claim 7, characterized in that: The air inlet (14) also includes a connecting plate (142) connecting the first partition (141) on the side away from the smoke baffle (12). The first partition (141) and the connecting plate (142) are fixed. The upper box (2) and the lower box (11) are provided with vertically extending guide rails (15) on their rear sides. The connecting plate (142) can slide and rotate relative to the guide rails (15).

9. The range hood according to claim 7, characterized in that: The baffle (13) is provided with a second baffle (131) corresponding to the first baffle (141). When in the open state, the first baffle (141) and the second baffle (131) cooperate to close the space between the left and right sides of the air inlet (14) and the bottom of the upper box (2).

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