A smoke baffle motion mechanism and range hood using the same

Abstract

The present invention discloses a smoke shield movement mechanism, including a smoke shield and a movement mechanism for driving the movement of the smoke shield, wherein the movement mechanism includes an active end, wherein the active end includes a driving mechanism and a transmission mechanism for transmitting the output of the driving mechanism to the smoke shield, and is characterized in that: the active end also includes a fixed support beam, and the transmission mechanism is arranged on the support beam. Also disclosed is a range hood using the smoke shield movement mechanism as described above. Compared with the prior art, the advantage of the present invention is that by providing a support beam, a mounting interface is provided for the transmission mechanism, thereby improving the consistency of movement of various parts of the transmission mechanism.

Description

Technical Field

[0001] The invention relates to an oil fume purification device, in particular to a fume baffle motion mechanism and an oil fume extractor using the motion mechanism. Background Art

[0002] Range hoods have become one of the indispensable kitchen appliances in modern families. Range hoods work based on the principle of fluid dynamics. A centrifugal fan installed inside the range hood absorbs and exhausts oil fumes, and uses a filter to filter out some grease particles. The centrifugal fan includes a volute, an impeller installed in the volute, and a motor that drives the impeller to rotate. When the impeller rotates, negative pressure suction is generated at the center of the fan, sucking the oil fumes under the range hood into the fan. After being accelerated by the fan, the fumes are collected by the volute and guided to be discharged outdoors.

[0003] Existing side-suction range hoods usually have an air inlet on the panel. In order to prevent the air inlet from being exposed and unsightly when the range hood is not working and to prevent oil smoke from flowing back, a smoke baffle is provided at the air inlet, which can also collect smoke when the range hood is working. For example, a side-suction range hood air curtain device and a range hood using the air curtain device disclosed in a Chinese patent with application number 201920284467.1 include a casing, a suction port is provided on the casing, and a smoke baffle is provided on the casing for covering or opening the suction port, the angle between the smoke baffle and the casing is adjustable, and the smoke baffle can cover or open the suction port; another example is a smoke baffle opening and closing device and a side-suction range hood disclosed in a Chinese patent with application number 201920106266.2, the smoke baffle opening and closing device includes a driving component, two sets of connecting rod mechanisms arranged at intervals in the smoke hood along the left and right directions, and a first shaft and a second shaft connected between the two sets of connecting rod mechanisms, the first shaft and the second shaft are both pivotally connected to the smoke hood, and the two are spaced apart in the upper and lower directions; the connecting rod mechanism includes a first connecting rod and a second connecting rod, the first connecting rod is fixedly mounted on the first shaft, the second connecting rod is fixedly mounted on the second shaft, and the output ends of the first connecting rod and the second connecting rod are respectively hinged at different positions of the smoke baffle.

[0004] The existing range hoods of this type generally adopt a flip-up upper panel or middle panel (smoke shield), that is, the air inlet is usually arranged in the upper middle position of the whole machine. After opening, the air inlet is about 400mm away from the pot in the vertical direction. There are the following problems: ① The air inlet is far away from the pot, and the negative pressure decays significantly. At this time, increasing the negative pressure by increasing the fan speed will not effectively improve the smoking effect; ② In order to ensure the smoking effect, the smoke shield needs to be about 440mm away from the wall to achieve a better smoke-collecting effect, which also brings about experience problems such as blocking the line of sight and bumping heads.

[0005] In addition, the movement mechanism of the smoke baffle of the existing range hood usually uses an electric push rod to directly connect to the rear plate of the shell, and the remaining transmission parts are in an active state or rotated around the connection with the side plate, resulting in poor rigidity of the shell, rigidity of the movement mechanism and flipping consistency of the smoke baffle, which affects and reduces the user experience. Summary of the invention

[0006] The first technical problem to be solved by the present invention is to provide a smoke shield movement mechanism in view of the deficiencies in the above-mentioned prior art, so as to enhance the rigidity of the movement mechanism and the consistency of the smoke shield movement and improve the user experience.

[0007] The second technical problem to be solved by the present invention is to provide a range hood using the above-mentioned smoke baffle movement mechanism.

[0008] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: a smoke shield movement mechanism, including a smoke shield and a movement mechanism for driving the smoke shield to move, the movement mechanism includes an active end, the active end includes a driving mechanism and a transmission mechanism for transmitting the output of the driving mechanism to the smoke shield, and is characterized in that: the active end also includes a fixed support beam, and the transmission mechanism is arranged on the support beam.

[0009] In order to facilitate the stable driving of the smoke shield to move, the transmission mechanism includes a first hinge and a second hinge serving as a driving arm driven to rotate by the driving mechanism. The first hinge is respectively hinged to the support beam and the smoke shield, and the second hinge is respectively hinged to the support beam and the smoke shield. The first hinge and the second hinge are each arranged above and below the hinge position of the smoke shield.

[0010] In order to make the two sides of the smoke shield move synchronously, the motion mechanism also includes a driven end. The driving end and the driven end are respectively arranged on both sides of the smoke shield. The driven end has the same structure as the driving end except for the driving mechanism. The driving end and the driven end are connected by a coupling shaft and move synchronously.

[0011] To facilitate driving the second hinge to rotate and thus drive the smoke shield to move, the transmission mechanisms at the active end and the driven end also include a first connecting rod and a second connecting rod. The end of the second hinge away from the smoke shield is hinged to one end of the second connecting rod, the position between the two ends of the second hinge is hinged to the support beam, the other end of the second connecting rod is hinged to one end of the first connecting rod, the two ends of the connecting shaft are respectively connected and fixed to the first connecting rod at the active end and the first connecting rod at the driven end, and the output end of the driving mechanism drives the connecting shaft to rotate around its own axis.

[0012] In order to improve the rotation consistency of the transmission mechanism and the synchronization of the two sides of the smoke baffle, a fixed bracket is arranged on the support beam, and the two ends of the connecting shaft pass through the fixed bracket respectively and are rotatably connected.

[0013] The technical solution adopted by the present invention to solve the above-mentioned second technical problem is: a range hood using the smoke baffle movement mechanism as described above, comprising a shell and an air inlet formed on the front side of the shell, and characterized in that: the smoke baffle can be in a first position closing the air inlet and a second position opening the air inlet under the drive of the movement mechanism.

[0014] In order to make the air inlet close to the smoke source, the negative pressure attenuation is less, and the smoking effect is greatly improved, the front side of the shell is respectively provided with an upper panel and a lower panel as a smoke baffle from top to bottom, and the air inlet is opened below the upper panel.

[0015] To prevent the shell from being deformed when it falls during transportation, the two ends of the support beam are respectively connected between the shell and the upper panel.

[0016] In order to enhance the rigidity of the shell, the shell includes a rear plate, the driving mechanism is an electric push rod, the electric push rod is connected and fixed to the rear plate, and the support beam is connected and fixed to the rear plate.

[0017] In order to isolate the oil smoke from the moving mechanism and extend the service life of the moving mechanism, an oil guide plate assembly and an inner lining plate assembly are provided in the shell. The oil guide plate assembly corresponds to the air inlet. The oil guide plate assembly and the inner lining plate assembly constitute a cavity for the oil smoke entering from the air inlet to pass through and reach the fan system. The moving mechanism is located outside the cavity.

[0018] Compared with the prior art, the advantages of the present invention are: by setting a support beam, an installation interface is provided for the transmission mechanism, thereby improving the consistency of movement of various parts of the transmission mechanism; by setting a connecting shaft, the active end and the driven end of the motion mechanism are connected, so that the two sides of the smoke baffle move synchronously; the connecting shaft and the fixed bracket on the support beam are rotatably connected to reduce deformation, thereby further improving the consistency of movement of the transmission mechanism and the synchronization of movement of the two sides of the smoke baffle; the support beam is connected to the shell and the panel to avoid deformation when the range hood falls during transportation; the support beam is fixedly connected to the rear plate to enhance the rigidity of the shell and avoid deformation caused by the force applied to the shell by the driving mechanism; the motion mechanism is arranged outside the oil circuit to extend the service life of the motion mechanism; through the above improvements, the user experience is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of a range hood in a closed state according to an embodiment of the present invention;

[0020] Figure 2 A cross-sectional view of a range hood in a closed state according to an embodiment of the present invention;

[0021] Figure 3 This is a cross-sectional view of the range hood in a closed state according to an embodiment of the present invention (the cross section is relative to Figure 2closer to the left);

[0022] Figure 4 It is a partial schematic diagram of the range hood in a closed state according to an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the range hood in an open state according to an embodiment of the present invention;

[0024] Figure 6 A cross-sectional view of the range hood in an open state according to an embodiment of the present invention;

[0025] Figure 7 It is a partial schematic diagram of the range hood in the open state according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the embodiments disclosed in the present invention can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0028] See also Figure 1 to Figure 3 , Figure 5 and Figure 6A range hood is a side-suction range hood, comprising a shell 1, the front side of the shell 1 is open and gradually tilted backward from top to bottom, and an upper panel 2 and a lower panel assembly 3 are respectively arranged at the open part of the shell 1 from top to bottom. An air inlet 11 is formed at the front side of the shell 1 and at a position corresponding to the lower panel assembly 3, and the air inlet 11 is opened below the upper panel 2. The upper panel 2 and the shell 1 are fixedly arranged, while the lower panel assembly 3 can translate and rotate relative to the shell 1, so as to open or close the air inlet 11. The shell 1 also includes side panels 12 located on the left and right sides, and a top rear panel 13 arranged between the side panels 12, the top rear panel 13 includes a top panel 132 and a rear panel 131, and the top panel 132 and the rear panel 131 can be integrated or can be a split structure connected together.

[0029] The lower panel assembly 3 serves as a smoke baffle, including a lower panel 31, a first baffle 32, a second baffle 33 and a third baffle 34. The shape and size of the lower panel 31 correspond to the air inlet 11. The first baffle 32 extends from the bottom of the lower panel 31 into the shell 1. The second baffle 33 has two, which are respectively arranged on both sides of the first baffle 33. The third baffle 33 is connected between the rear sides of the first baffle 32 and the second baffle 33. The first baffle 32, the second baffle 33 and the third baffle 34 form a cover body with a triangular longitudinal cross-section, and are connected and fixed to the lower panel 31 so that the lower panel assembly 3 constitutes a relatively closed space.

[0030] A fan frame 4 is arranged above the housing 1, and a fan system (not shown) is arranged inside the fan frame 4, thereby forming a range hood with a fan mounted on top. An oil guide plate assembly 7 is arranged inside the housing 1, and an oil cup 8 is arranged at the bottom of the housing 1. The oil guide plate assembly 7 includes a first oil guide plate 71 extending from the lower end of the upper panel 2 toward the inside of the housing 1, and preferably gradually tilting downward, and a second oil guide plate 72 extending downward from the rear end of the first oil guide plate 71, and preferably gradually tilting forward, and the lower end of the second oil guide plate 72 extends above the oil cup 8 to guide the oil droplets into the oil cup 8. The upper end of the oil cup 8 is open, and the front side of the oil cup 8 covers the bottom of the housing 1, so that all the oil droplets in the housing 1 can enter the oil cup 8. An oil leakage hole 16 is opened at the bottom of the housing 1, so that the oil droplets enter the oil cup 8 through the oil leakage hole 16.

[0031] The first oil guide plate 71 and the second oil guide plate 72 are preferably integrally formed. An inner lining plate assembly is provided in the housing 1, and is arranged above the oil guide plate assembly 7. The inner lining plate assembly includes a front inner lining plate 151 arranged above the front side of the first oil guide plate 71, and the front inner lining plate 151 preferably extends upward and gradually tilted forward from the upper part of the first oil guide plate 71 to the top of the housing 1 and is connected to the top rear plate 13 of the housing 1. More preferably, the front inner lining plate 151 is parallel to the upper panel 2. The inner lining plate assembly also includes side inner lining plates 152 respectively arranged on the inner sides of the left and right side plates 12 of the housing 1, and the lower ends of the two side inner lining plates 152 are respectively connected to the left and right ends of the first oil guide plate 71. The space between the oil guide plate assembly 7, the front inner lining plate 151, the side inner lining plates 152, the top rear plate 13 and the fan frame 4 constitutes an inner cavity 142. When the range hood is in the open state, the space between the oil guide plate assembly 7, the side plate 12 and the lower panel assembly 3 forms an outer cavity 141 for collecting smoke. The inner cavity 142 and the outer cavity 141 are both located below the fan system.

[0032] When the range hood is closed, the first baffle 32, the second baffle 33 and the third baffle 34 of the lower panel assembly 3 are just placed in the outer cavity 141, and the upper panel 2 and the lower panel 31 form a whole large plane, which is the first position of the lower panel assembly 3. When the range hood is working and in the open state, the lower panel assembly 3 can move to the front of the upper panel 2 and open the air inlet 11, and a complete outer cavity 141 is formed at this time, which is the second position of the lower panel assembly 3. When the range hood is turned on and in the working state, there is a certain gap between the lower panel assembly 3 and the upper panel 2, and the first baffle 32 of the lower panel assembly 3 gradually tilts upward from front to back to form a guide structure, which can quickly guide the oil smoke under the lower panel assembly 3 into the outer cavity 141 on the front side of the oil guide plate assembly 7. In order to ensure the best smoke collection effect and user experience, when the range hood is installed on the wall, the distance between the bottom of the lower panel 31 and the wall is 360-380mm.

[0033] See also Figure 2 to Figure 7In order to facilitate the automatic driving of the lower panel assembly 3, a motion mechanism is provided on the side of the lower panel assembly 3 facing the inside of the shell 1, including a support beam 371 fixed in the shell 1, a drive mechanism 372, a first hinge 373, a second hinge 374, a first connecting rod 375 and a second connecting rod 376. The two ends of the support beam 371 are respectively connected and fixed to the upper panel 2 and the top rear plate 13 of the shell 1. The first hinge 373 is bent, preferably, in a roughly V-shape, with an opening facing forward, one end of the first hinge 373 is hinged to the front end of the support beam 371 (the hinge is the rotation center of the first hinge 373), and the other end is hinged to the lower panel 31 through a panel bracket 312, wherein the panel bracket 312 is fixedly arranged on the side of the lower panel 31 facing the inside of the shell 1. The second hinge 374 may be in the shape of a long strip, which is hinged to the support beam 371 (the hinge is the rotation center of the second hinge 374), and one end is hinged to the lower panel 31 through the panel bracket 312. The connection between the first hinge 373 and the panel bracket 312 is located above the connection between the second hinge 374 and the panel bracket 312. Optionally, the first hinge 373 and the second hinge 374 may also be connected to the lower panel 31 through two independent panel brackets 312.

[0034] The second connecting rod 376 is preferably in an arc shape protruding upward, one end of which is hinged to the second hinge 374, such as hinged to the end of the second hinge 374, the middle position of the second hinge 374 is hinged to the support beam 371, and the other end of the second connecting rod 376 is hinged to one end of the first connecting rod 375. The motion mechanism has an active end and a driven end. The motion mechanism of the driven end does not need to be provided with a driving mechanism 372, and the other structures are the same as the active end. The active end and the driven end are respectively arranged on the left and right sides of the lower panel 31. The end of the first connecting rod 375 of the active end away from the second connecting rod 376 and the end of the first connecting rod 375 of the driven end away from the second connecting rod 376 are connected by a connecting shaft 377. The connecting shaft 377 passes through the end of each first connecting rod 375 and is connected to the first connecting rod 375, so that when the connecting shaft 377 rotates, each first connecting rod 375 can be driven to rotate accordingly. The connecting shaft 377 extends in the left-right direction so that the motion mechanisms on both sides of the lower panel 31 can move synchronously and can be opened and closed smoothly. Based on space considerations, by setting a connecting rod mechanism composed of a first connecting rod 375 and a second connecting rod 376, the load rotation center (the rotation center where the connecting shaft 377 is located) is transferred to a position close to the lower panel 31, so that it can be easily installed. The second hinge 374 is a driving arm, and the first hinge 373 is a driven arm. The rotation axes of the first hinge 373, the second hinge 374, the second connecting rod 376 and the first connecting rod 375 are all extended in the left-right direction. Both ends of the second connecting rod 376 can be located above the support beam 371, or one end can be located above the support beam 371 and the other end can be located below the support beam 371.

[0035] The connecting shaft 377 is driven by the driving mechanism 372. In this embodiment, the driving mechanism 372 is an electric push rod, which can increase the self-locking force of the motion mechanism. The electric push rod is connected and fixed to the rear plate 131 of the top rear plate 13. The output end of the electric push rod is connected to the connecting shaft 377 through the third connecting rod 3723. One end of the third connecting rod 3723 is rotatably connected to the output end of the electric push rod, and the other end is sleeved on the outer periphery of the connecting shaft 377 and connected and fixed. Therefore, when the output end of the electric push rod makes a linear motion, the connecting shaft 377 can be driven to rotate around its own axis through the third connecting rod 3723.

[0036] A fixing bracket 3712 is provided on the support beam 371, and one end of the first hinge 373 is hinged to the fixing bracket 3712 at a position above the support beam 371, thereby realizing the hinge connection with the support beam 371. Both ends of the connecting shaft 377 pass through the fixing bracket 3712 respectively, and a bearing seat 3771 is provided on the fixing bracket 3712. Each end of the connecting shaft 377 passes through the bearing shaft 3771 respectively, and a bearing (not shown) can be provided between the bearing seat 3771 and the connecting shaft 377, so as to facilitate the rotation of the connecting shaft 377 relative to the fixing bracket 3712.

[0037] When the driving mechanism 372 is started, the third connecting rod 3723 can drive the connecting shaft 377 to rotate, thereby driving the first connecting rod 375 at the active end and the driven end to rotate synchronously through the connecting shaft 377, thereby driving the second connecting rod 376 to rotate, and driving the second hinge 374 to rotate through the second connecting rod 376. The second hinge 374, the panel bracket 312, the first hinge 373, the support beam 371 and the fixed bracket 3712 form a four-bar structure. When the second hinge 374 is driven by the second connecting rod 376, it can drive the lower panel 31 to move. As a result, the lower panel 31 moves from the first position of closing the air inlet 11 to the second position located on the front side of the upper panel 2 through the composite movement of translation and rotation, and can also return from the second position to the first position of closing the air inlet 11 through the composite movement of translation and rotation. After the lower panel 31 is opened, it is basically at a 90-degree angle to the line of sight, which is convenient for operation.

[0038] By setting the first hinge 373 and the second hinge 374, the motion trajectory of the upper and lower hinge points of the lower panel 31 is controlled respectively, so that the lower panel 31 can realize the compound motion of translation and rotation. Since the double hinge structure itself has a large amount of shaking, there are two active points at the non-active end, and it is impossible to move synchronously, so a connecting shaft 377 is added to realize the transmission of torque and increase the synchronization of the left and right sides. The thrust of the electric push rod is amplified by the double four-link series design of the active end and the driven end. The connecting shaft 377 is located on the front side of the front inner lining plate 151, and the active end and the driven end are respectively located on the side of the side inner lining plate 152 facing the outside of the inner cavity 142. As a result, the entire motion mechanism is located outside the cavity where the oil smoke passes, and can be isolated from the oil smoke, thereby avoiding the influence of the oil smoke, improving the accuracy, and extending the service life. Moreover, since it is not necessary to pass through the inner cavity 142, it is not necessary to open holes on each inner lining plate, which ensures the airtightness of the inner cavity 142.

[0039] When the electric push rod drives the lower panel 31 to close, it needs to output a large pulling force. At this time, the top rear panel 13 is easily deformed by pulling. However, in this embodiment, due to the addition of the support beam 371, the rigidity of the connection between the support beam 371 and the top rear panel 13 is greatly improved, and deformation will no longer occur. The support beam 371 can support the weight of the lower panel assembly 3, and is the interface of the various rods (transmission mechanisms composed of various hinges, connecting rods, and connecting shafts) that control the movement trajectory of the lower panel assembly 3. It connects the top rear panel 13 and the upper panel 2 of the shell 1, enhances the rigidity of the shell 1, and improves the ability to resist falling during transportation.

[0040] In the prior art, the bracket (the structure corresponding to the fixed bracket 3712 of the present invention) that is usually used to connect with the rotation center of the transmission part of the connecting shaft 377 or the motion mechanism is set on the side plate 11 of the shell 1. However, due to the small area and thin thickness of the connection position with the side plate 11, and the output end of the driving mechanism 372 outputs a large pulling force, it is easy to cause the bracket to deform, resulting in the smoke baffle not being closed tightly, the active end and the driven end being deformed inconsistently, and the two sides of the smoke baffle being out of sync. In the present invention, the fixed bracket 3712 is set on the support beam 371, and the connecting shaft 377 is rotatably connected to the fixed bracket 3712 through the bearing and the bearing seat 3771, which can avoid the problem of easy deformation. In addition, the support beam 371 is used as an interface for each hinge or connecting rod of the motion mechanism, that is, the rotation centers of the first hinge 373, the second hinge 374, the first connecting rod 375 and the connecting shaft 377 are all on the support beam 371 (fixed bracket 3712), which maintains the movement consistency of the above-mentioned transmission components and improves the user experience.

Claims

1. A smoke shield movement mechanism, comprising a smoke shield and a movement mechanism for driving the smoke shield to move, the movement mechanism comprising an active end, the active end comprising a drive mechanism (372) and a transmission mechanism for transmitting the output of the drive mechanism (372) to the smoke shield, characterized in that: The active end further comprises a fixed support beam (371), and the transmission mechanism is arranged on the support beam (371); The transmission mechanism comprises a first hinge (373) and a second hinge (374) as a driving arm driven to rotate by a driving mechanism (372), the first hinge (373) being hinged to the support beam (371) and the smoke shield respectively, the second hinge (374) being hinged to the support beam (371) and the smoke shield respectively, and the first hinge (373) and the second hinge (374) being hinged to the smoke shield respectively at upper and lower positions; The motion mechanism also includes a driven end, the driving end and the driven end are respectively arranged on both sides of the smoke baffle, the driven end and the driving end have the same structure except for the driving mechanism (372), and the driving end and the driven end are connected by a connecting shaft (377) so as to move synchronously; The transmission mechanisms at the active end and the driven end also include a first connecting rod (375) and a second connecting rod (376); one end of the second hinge (374) away from the smoke baffle is hinged to one end of the second connecting rod (376); the position between the two ends of the second hinge (374) is hinged to the support beam (371); the other end of the second connecting rod (376) is hinged to one end of the first connecting rod (375); the two ends of the connecting shaft (377) are respectively connected and fixed to the first connecting rod (375) at the active end and the first connecting rod (375) at the driven end; and the output end of the driving mechanism (372) drives the connecting shaft (377) to rotate around its own axis; The support beam (371) is provided with a fixed bracket (3712), and the two ends of the connecting shaft (377) respectively pass through the fixed bracket (3712) to be rotatably connected.

2. A range hood using the smoke baffle movement mechanism according to claim 1, comprising a housing (1), an air inlet (11) formed on the front side of the housing (1), characterized in that: The smoke baffle can be driven by the motion mechanism to be in a first position for closing the air inlet (11) and a second position for opening the air inlet (11); An oil guide plate assembly (7) and an inner lining plate assembly are arranged in the shell (1); the oil guide plate assembly (7) corresponds to the air inlet (11); the oil guide plate assembly (7) and the inner lining plate assembly form a cavity through which oil smoke entering from the air inlet (11) passes and reaches the fan system; the movement mechanism is located outside the cavity.

3. The range hood according to claim 2, characterized in that: An upper panel (2) and a lower panel (31) serving as a smoke baffle are respectively arranged on the front side of the shell (1) from top to bottom, and the air inlet (11) is opened below the upper panel (2).

4. The range hood according to claim 3, characterized in that: The two ends of the support beam (371) are respectively connected between the shell (1) and the upper panel (2).

5. The range hood according to claim 4, characterized in that: The housing (1) comprises a rear plate (131), the driving mechanism (372) is an electric push rod, the electric push rod is connected and fixed to the rear plate (131), and the support beam (371) is connected and fixed to the rear plate (131).

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