CN220541164U - Fume exhauster - Google Patents

Abstract

The utility model discloses a range hood, which comprises a fume collecting hood, a fan frame and a fan, wherein a first air inlet and a second air inlet are formed in the fume collecting hood; the range hood further comprises a first smoke guide plate and a second smoke guide plate; the first smoke guide plate and the second smoke guide plate can be at least in the following two states: in a closed state, the first air inlet is closed by the first smoke guide plate, the second air inlet is closed by the second smoke guide plate, the end parts of the two smoke guide plates, which are close to each other, are respectively first end parts, the end parts of the two smoke guide plates, which are far away from each other, are respectively second end parts, and each first end part is restrained by the smoke collecting hood, and each second end part is a free end; and in an open state, at least one of the first smoke guide plate and the second smoke guide plate turns over towards the interior of the smoke collecting hood to open the corresponding air inlet. Compared with the prior art, the utility model has the advantages that: through making the smoke guide plate overturn in to the collection petticoat pipe when opening to can practice thrift the space of collection petticoat pipe below, increase culinary art operation space, thereby promote user experience.

Description

Fume exhauster

Technical Field

The utility model relates to a lampblack purifying device, in particular to a range hood.

Background

The range hood has become one of the indispensable kitchen appliances in modern families. The range hood works by utilizing the fluid dynamics principle, and the range hood sucks and discharges oil smoke through a centrifugal fan arranged in the range hood and filters part of oil dirt particles by using a filter screen. The centrifugal fan comprises a volute, an impeller arranged in the volute and a motor for driving the impeller to rotate. When the impeller rotates, negative pressure suction is generated at the center of the fan, and oil smoke below the range hood is sucked into the fan and is collected by the volute after being accelerated by the fan to be guided to be discharged out of the room.

The two burners of the common household kitchen range are generally divided into left and right, and two air inlets are arranged at the bottom of the range hood in order to correspond to the two burners of the kitchen range, so that the smoking effect of the two burners during simultaneous cooking can be improved. The utility model provides a range hood of chinese patent publication of application number 201820964443.6, includes collection petticoat pipe, first fender cigarette board, second fender cigarette board and drive unit, and first fender cigarette board and second fender cigarette board all set up in collection petticoat pipe encloses and establish the chamber that draws together that forms, and all can outwards expand under drive unit's drive to expand the horizontal cigarette region that draws together of range hood, also all can be under drive unit's drive by the state of expansion withdraw and accomodate in drawing together the chamber. However, when the range hood is in an open state, a large space below the fume collecting hood is occupied, so that the cooking operation space is compressed, and the use experience of a user is reduced.

Disclosure of Invention

The first technical problem to be solved by the utility model is to provide the range hood aiming at the defects in the prior art, so that the space below the range hood is saved, and the cooking experience is improved.

The technical scheme adopted for solving the technical problems is as follows: the range hood comprises a fume collecting hood, a fan frame arranged above the fume collecting hood and a fan arranged in the fan frame, wherein a first air inlet and a second air inlet which are arranged left and right are formed in the fume collecting hood;

the range hood further comprises a first smoke guide plate and a second smoke guide plate; the method is characterized in that:

the first smoke guide plate and the second smoke guide plate can be at least in the following two states:

the first smoke guide plate closes the first air inlet, the second smoke guide plate closes the second air inlet, the end parts of the two smoke guide plates, which are close to each other, are respectively first end parts, the end parts of the two smoke guide plates, which are far away from each other, are respectively second end parts, and each first end part is restrained by the smoke collecting hood, and each second end part is a free end;

and in an open state, at least one of the first smoke guide plate and the second smoke guide plate turns over towards the interior of the smoke collecting hood to open the corresponding air inlet.

Through making the smoke guide plate overturn in to the collection petticoat pipe when opening to can practice thrift the space of collection petticoat pipe below, increase culinary art operation space, thereby promote user experience.

Further, the first and second smoke guide plates are lockable with the smoke collecting hood in the closed and open states. Because the range hood can vibrate during operation, the vibration of the smoke guide plates can be effectively reduced by locking the smoke guide plates, and abnormal sound is reduced.

Further, one side of each smoke guide plate facing into the smoke collecting hood is provided with a locking device, the locking device is provided with an outer lock tongue close to the front side and/or the rear side of the smoke collecting hood, a first lock hole and a second lock hole are formed in corresponding positions of the smoke collecting hood, the first lock hole is used for locking the outer lock tongue in the closed state of each smoke guide plate, and the second lock hole is used for locking the outer lock tongue in the open state of each smoke guide plate, so that the locking of the smoke guide plates is realized.

Further, in order to be convenient for retrain each smoke guide plate, the rotation is provided with the pivot in the smoke collecting cover, first tip of first smoke guide plate is fixed with corresponding pivot through first connecting rod, first tip of second smoke guide plate is fixed with corresponding pivot through the second connecting rod, the axis of rotation of pivot extends in the fore-and-aft direction, still can avoid the smoke guide plate to directly be connected through the pivot with the smoke collecting cover and bring the assembly clearance, ensures the sealing of closed state.

Further, the range hood further includes a moving mechanism for driving the first and second smoke guide plates such that the first and second smoke guide plates can move synchronously or independently, whereby each smoke guide plate can be automatically controlled.

Further, in order to achieve synchronous or independent movement, the movement mechanism comprises a first driving mechanism, a second driving mechanism and a transmission mechanism, the transmission mechanism comprises a first gear, a second gear, a third gear and a rack, the first gear is arranged on the left side of the rack, the second gear is arranged on the right side of the rack, the first gear and the second gear are respectively fixed with one rotating shaft, and the third gear can rotate relative to the fume collecting hood;

the first driving mechanism is used for driving the rack to lift, the second driving mechanism is used for driving the first gear or the second gear to move back and forth, and when the first gear and the second gear are respectively meshed with the rack, the first driving mechanism drives the rack to lift and can drive the first gear and the second gear to rotate at the same time, so that the two smoke guide plates can be driven to move synchronously; when the second driving mechanism drives the first gear or the second gear to move away from the rack to be meshed with the third gear, the two smoke guide plates independently move.

Further, the fume collecting hood further comprises a front plate, a front lining plate, a rear lining plate and a rear plate which are sequentially arranged at intervals from front to back, a space between the front plate and the front lining plate is formed into a first interlayer, a space between the rear lining plate and the rear plate is formed into a second interlayer, the first fume guide plate and the second fume guide plate are positioned between the front lining plate and the rear lining plate, and the transmission mechanism is arranged in one interlayer, so that the transmission mechanism is prevented from being affected by greasy dirt.

Further, the bottom surface of collection petticoat pipe is the V font, the bottom surface of collection petticoat pipe is including the first curb plate that is located the left side and the second curb plate that is located the right side, first curb plate from left to right decurrent gradually, the second curb plate from right to left decurrent gradually, the junction of two curb plates is the lowest position of collection petticoat pipe bottom surface, first air intake is seted up on first curb plate, the second air intake is seted up on the second curb plate, and each curb plate can guide the oil smoke that rises from this to promote to get into corresponding air intake.

Further, the right edge of the first air inlet is higher than the right end part of the first side plate, and the left edge of the second air inlet is higher than the left end part of the second side plate; the fume collecting hood further comprises a bottom plate, the bottom plate is arranged above the intersection of the first side plate and the second side plate, the left side and the right side of the bottom plate are lower than the lower edge of the corresponding air inlet, and the space between the two side plates of the fume collecting hood below the bottom plate is formed into an oil collecting groove, so that the fume collecting hood can be conveniently collected and the greasy dirt flowing down in the fan frame can be conveniently collected.

Further, the fan comprises a volute and an oil guide piece arranged at the bottom of the volute, wherein the oil guide piece is in a shape with the top surface recessed downwards, so that an oil guide groove is formed in the oil guide piece, and the oil guide groove can be communicated with an oil collecting groove, so that oil stains in the fan can be collected.

Further, the fume collecting hood further comprises a front plate, a front lining plate, a rear lining plate and a rear plate which are sequentially arranged at intervals from front to back, a first interlayer is formed in the space between the front plate and the front lining plate, a second interlayer is formed in the space between the rear lining plate and the rear plate, the first fume guiding plate and the second fume guiding plate are located between the front lining plate and the rear lining plate, and the oil guiding groove and the oil collecting groove are communicated with the same interlayer in the two interlayers, so that the fume guiding plate and an oil way are isolated, and the movement of the fume guiding plate is prevented from being influenced.

Compared with the prior art, the utility model has the advantages that: through making the smoke guide plate overturn in to the collection petticoat pipe when opening to can practice thrift the space of collection petticoat pipe below, increase culinary art operation space, thereby promote user experience.

Drawings

Fig. 1 is a schematic view of a closed state of a range hood according to an embodiment of the present utility model;

fig. 2 is a cross-sectional view (left-right vertical cross-section) of a closed state of the range hood according to an embodiment of the present utility model;

fig. 3 is a sectional view (front-rear vertical section) of a closed state of the range hood according to the embodiment of the present utility model;

fig. 4 is a schematic view of two smoke guide plates and a movement mechanism thereof of a range hood according to an embodiment of the present utility model;

fig. 5 is a cross-sectional view of a motion mechanism of a range hood driving two smoke guide plates to rotate synchronously according to an embodiment of the present utility model;

fig. 6 is a cross-sectional view of a motion mechanism of a range hood according to an embodiment of the present utility model driving two smoke guide plates to rotate independently;

fig. 7 is a schematic view of a motion mechanism of a range hood driving two smoke guide plates to rotate independently according to an embodiment of the present utility model;

fig. 8 is a schematic view illustrating an opened state of a range hood according to an embodiment of the present utility model;

fig. 9 is a sectional view showing an opened state of the range hood according to the embodiment of the present utility model;

fig. 10 is an air intake schematic diagram of an open state of the range hood according to the embodiment of the present utility model;

fig. 11 is a cross-sectional view (horizontal cross-section) of the range hood according to the embodiment of the present utility model in an intermediate state between an open state and a closed state.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions.

In the description of the present utility model, 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", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for purposes of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and because the disclosed embodiments of the present utility model may be arranged in different orientations, these directional terms are merely for illustration and should not be construed as limitations, such as "upper", "lower" are not necessarily limited to orientations opposite or coincident with the direction of gravity. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly.

Referring to fig. 1 to 3 and 8 to 10, the range hood is a top-draft range hood and comprises a fume collecting hood 1, a fan frame 2 arranged above the fume collecting hood 1 and a fan 3 arranged in the fan frame 2. Preferably, the fan 3 is a centrifugal fan and is a double air intake fan, the axis of which extends in the left-right direction, whereby the two air inlets of the fan 3 are directed to the left and right, respectively. The blower 3 may be disposed at an intermediate position within the blower housing 2.

The bottom surface of collection petticoat pipe 1 is the V font, including the first curb plate 13 that is located the left side and the second curb plate 14 that is located the right side, first curb plate 13 from left to right gradually downward sloping, second curb plate 14 from right to left gradually downward sloping, the junction of two curb plates is the lowest position of collection petticoat pipe 1 bottom surface. The first side plate 13 is provided with a first air inlet 11, and the second side plate 14 is provided with a second air inlet 12. The left side edge (upper edge) of the first air intake 11 may be lower than the left end (upper end) of the first side plate 13, the right side edge (lower edge) of the first air intake 11 may be higher than the right end (lower end) of the first side plate 13, the right side edge (upper edge) of the second air intake 12 may be lower than the right end (upper end) of the second side plate 14, and the left side edge (lower edge) of the second air intake 12 may be higher than the left end (lower end) of the second side plate 14. The end parts of the two smoke guide plates, which are close to each other, are respectively first end parts, and the end parts of the two smoke guide plates, which are far away from each other, are respectively second end parts when the smoke guide plates are in a closed state. The two smoke-guide plates are constrained at a first end by the smoke-collecting hood 1 and at a second end by a free end, the second end being locked by additional structure when rotated into place, the above constraint and locking structure being described in more detail below.

The range hood further comprises a first smoke guide plate 41 for opening and closing the first air inlet 11 and a second smoke guide plate 42 for opening and closing the second air inlet 12. When the first smoke guide plate 41 and the second smoke guide plate 42 are folded, the smoke guide plates turn towards the inside of the fan frame 2, and the second end parts of the smoke guide plates in the folded state can be contacted with the bottom of the fan 3, so that the air channels in the fan frame 2 are jointly separated from the fan 3, the space below the range hood can be saved, and the cooking operation space is increased. The fume collecting hood 1 is opened at the top corresponding to the first side plate 13 and the second side plate 14, so that the fume collecting hood 1 is communicated with the inside of the fan frame 2, when the two fume guiding plates are folded, the space positioned at the left side of the first fume guiding plate 41 and the left side of the fan 3 in the fume collecting hood 1 forms a first air channel S1, the space positioned at the right side of the second fume guiding plate 42 and the right side of the fan 3 in the fume collecting hood 1 forms a second air channel S2, and only one fume guiding plate can be opened, and at the moment, only one corresponding air channel at one side is opened.

The first smoke-guiding plate 41 and the second smoke-guiding plate 42 can be in at least two states, the first state is a closed state and the second state is an open state. In the closed state, as shown in fig. 1 and 2, the first and second smoke-guiding plates 41 and 42 are in a state of being unfolded at a maximum angle, the first smoke-guiding plate 41 closes the first air inlet 11, and the second smoke-guiding plate 42 closes the second air inlet 12. This closed state prevents the transmission of odors into the kitchen. In the open state, at least one of the first smoke guide plate 41 and the second smoke guide plate 42 rotates into the smoke collecting hood 1, as shown in fig. 8 and 9, the first smoke guide plate 41 and the second smoke guide plate 42 rotate toward each other until being closed, and as shown by an oil smoke flow path indicated by an arrow in fig. 10, oil smoke enters the first air duct S1 on the left side from the first air inlet 11, and enters the second air duct S2 on the right side from the second air inlet 12.

Referring to fig. 4 to 7, the first ends of the first smoke guide plate 41 and the second smoke guide plate 42 are directly rotatably connected to the smoke collecting hood 1 via a rotation shaft 45. The first smoke guide plate 41 is fixed to the corresponding rotation shaft 45 through a first link 461, and the second smoke guide plate 42 is fixed to the corresponding rotation shaft 45 through a second link 462. The range hood further comprises a movement mechanism for driving the first smoke guide plate 41 and the second smoke guide plate 42 to rotate. The motion mechanism comprises a first driving mechanism 63 and a transmission mechanism, wherein the first driving mechanism 63 is a linear driving module, the conventional linear driving module with any structure can be adopted, the transmission mechanism comprises a first gear 651, a second gear 652, a third gear 653 and a rack 654, the first driving mechanism 63 is used for driving the rack 654 to lift, teeth are arranged on the left side and the right side of the rack 654, the first gear 651 is arranged on the left side of the rack 654, the second gear 652 is arranged on the right side of the rack 654, the first gear 651 is fixed with a rotating shaft 45 corresponding to the first smoke guide plate 41, the second gear 652 is fixed with a rotating shaft 45 corresponding to the second smoke guide plate 42, and each rotating shaft is fixed by penetrating through the center of the corresponding gear. The third gear 653 can rotate relative to the fume collecting hood 1, and the rotation axis is parallel to the rotation axes of the first gear 651 and the second gear 652.

The first gear 651 and the second gear 652 may simultaneously mesh with the rack 654, so that when the first driving mechanism 63 drives the rack 654 to lift, the first gear 651 and the second gear 652 may rotate synchronously, driving the first smoke guide plate 41 and the second smoke guide plate 42 to rotate synchronously, thereby achieving unfolding and folding, see fig. 4 (the third gear 653 is hidden in fig. 4) and fig. 5. The third gear 653 is disposed in tandem with the rack 654.

The motion mechanism further comprises a second driving mechanism 66, which is also a linear driving module, the second driving mechanism 66 can have two, wherein the output end of one second driving mechanism 66 is connected with the first gear 651, and the output end of the other second driving mechanism 66 is connected with the second gear 652, so that the two gears can be driven to independently move forwards and backwards. Referring to fig. 6 and 7, if the second gear 652 is moved to be not engaged with the rack 654 but engaged with the third gear 653, the third gear 653 is driven (a driving mechanism of the third gear 653 is not shown, and the driving mechanism is a rotation driving module, such as a motor) to rotate the second gear 652, thereby driving the second smoke guide 42 to rotate, while the first smoke guide 41 is not affected (may be stationary and rotatable). The same applies to the independent rotation of the first smoke guide 41.

Referring to fig. 3, the fume collecting hood 1 further includes a front plate 161, a front liner plate 162, a rear liner plate 163 and a rear plate 164 which are sequentially arranged at intervals from front to back, a space between the front plate 161 and the front liner plate 162 constitutes a first interlayer 181, and a space between the rear liner plate 163 and the rear plate 164 constitutes a second interlayer 182. The three gears and racks 654 are disposed in the second interlayer 182 between the rear plate 164 and the rear lining plate 163, wherein the third gear 653 is connected with the rear plate 164, the racks 654 are connected with the rear lining plate 163, and the second interlayer 182 with good sealing performance is used for isolating the gear structure from the oil smoke environment. The first smoke guide 41 and the second smoke guide 42 are positioned between the front liner 162 and the rear liner 163 when they are folded.

The fume collecting hood 1 further comprises a bottom plate 17, wherein the bottom plate 17 is arranged above the intersection of the first side plate 13 and the second side plate 14, and the left side and the right side of the bottom plate 17 are lower than the lower edges of the corresponding air inlets. The space between the two side plates of the fume collecting hood 1 below the bottom plate 17 is formed into an oil collecting groove 15, and the oil dirt flowing down in the air blower frame 2, the air blower 3 and the fume collecting hood 1 can be collected. The rotating shaft 45 is located above the bottom plate 17.

The blower 3 may be disposed at a middle position in the left-right direction of the blower frame 2, and includes a scroll 31, an impeller 32 disposed in the scroll 31, and a motor 33 for driving the impeller 32 to rotate. The impeller 32 is a double suction impeller, and its axis extends in the left-right direction. The bottom of the scroll case 31 is provided with an oil guide 34, and the oil guide 34 has a shape with a top surface recessed downward, thereby forming an oil guide groove 341 in the oil guide 34. An oil leakage hole (not shown) is formed in the lowest position of the bottom of the volute 31, the position of the oil guiding groove 341 corresponds to the oil leakage hole, and oil stains in the volute 31 are collected into the oil guiding groove 341 through the oil leakage hole. The oil guide 34 is provided with a first notch 342 at a portion corresponding to the first interlayer 181, so that the oil guide groove 341 is communicated with the first interlayer 181, the bottom plate 17 is provided with a second notch 171 at a portion corresponding to the first interlayer 181, and the oil collecting groove 15 is communicated with the first interlayer 181, and therefore, oil stains in the oil guide groove 341 can be collected downwards into the oil collecting groove 15 through the first interlayer 181. Since the movement mechanism of the present utility model occupies a second interlayer 182 on the rear side, the oil guide groove 341 and the oil sump 15 are communicated through the first interlayer 181, alternatively, the movement mechanism may occupy the first interlayer 181, and the oil guide groove 341 and the oil sump 15 are communicated through the second interlayer 182.

Referring to fig. 4 and 11, a locking device 7 is disposed on a side of each smoke guide plate facing the smoke collecting hood 1, the locking device 7 includes a strip-shaped body 71 extending along a front-rear direction, at least one of front and rear ends of the locking device has a bending portion 72 bending away from the corresponding smoke guide plate, the bending portion 72 is consistent with an extending direction of the corresponding coaming, in this embodiment, both ends of the locking device have bending portions 72, and hereinafter, both front and rear ends of the locking device can be locked as an example. The opposite side of each bending part 72 is provided with an inner locking tongue 73, and the side of each bending part 72 away from each other is provided with an outer locking tongue 74. The body 71 of the locking device 7 can be extended and retracted along the front-rear direction, so as to move the positions of the inner lock tongue 73 and the outer lock tongue 74, and the extension and retraction of the body 71 can be performed by using an existing extension and retraction mechanism. Alternatively, a self-telescopic bolt can be used to lock and unlock.

The front and rear liners 162 and 163 are respectively provided with a first locking hole 165 and a second locking hole 166 corresponding to the outer locking tongue 74, and the first locking holes 165 of the front and rear liners 162 and 163 are respectively located at positions approximately midway in the left-right direction, and the first locking holes 165 on each liner have two left-right spaced arrangement so as to correspond to the two smoke guide plates. The positions of the second lock holes 166 of the front lining board 162 and the rear lining board 163 correspond to each other, and two second lock holes 166 are arranged on each lining board, wherein one second lock hole 166 is close to the first air inlet 11 and corresponds to the first smoke guide plate 41, and the other second lock hole 166 is close to the second air inlet 12 and corresponds to the second smoke guide plate 42. The first locking hole 165 corresponds to the opened state of each smoke guide plate, and the second locking hole 166 corresponds to the closed state of each smoke guide plate. When the body 71 of the locking device 7 is extended, the outer lock tongue 74 is locked with the corresponding lock holes on the front lining plate and the rear lining plate, so that the fixation of the corresponding smoke guide plate is realized, and the outer lock tongue 74 of the locking device 7 corresponding to the first smoke guide plate 41 is locked with the first lock hole 165 on the rear lining plate 163. Because the range hood can produce vibration when running, locking each smoke guide plate can effectively reduce smoke guide plate vibration, reduces abnormal sound and takes place, in addition, can set up sealed pad (not shown) in each smoke guide plate department, the locking of each smoke guide plate can strengthen the leakproofness of sealed pad.

When a user firstly performs double-side cooking and then performs single-side cooking, namely, the user firstly performs cooking on two furnace heads, then closes the left furnace head and only performs cooking on the right furnace head, in this state, opens the range hood, the two smoke guide plates synchronously rotate, and opens the first air inlet 11 and the second air inlet 12, and at the moment, the two air inlets realize simultaneous smoking. When the user closes the left side cooking head and cooks only on the right side cooking head, the second driving mechanism 66 separates the first gear 651 from the rack 654 and is meshed with the third gear 653, and the third gear 653 drives the first gear 651, so that the first smoke guide plate 41 on the left side rotates to close the first air inlet 11.

The term "fluid communication" as used herein refers to a spatial positional relationship between two components or parts (hereinafter collectively referred to as a first part and a second part, respectively), that is, a fluid (gas, liquid, or a mixture of both) can flow along a flow path from the first part to the second part or/and be transported to the second part, or the first part and the second part may be directly communicated with each other, or the first part and the second part may be indirectly communicated with each other through at least one third party, and the third party may be a fluid channel such as a pipe, a channel, a conduit, a flow guiding member, a hole, a groove, or the like, or a chamber allowing the fluid to flow through, or a combination thereof.

Claims (11)

1. The range hood comprises a fume collecting hood (1), a fan frame (2) arranged on the fume collecting hood (1) and a fan (3) arranged in the fan frame (2), wherein a first air inlet (11) and a second air inlet (12) which are arranged left and right are formed in the fume collecting hood (1);

the range hood further comprises a first smoke guide plate (41) and a second smoke guide plate (42); the method is characterized in that:

the first smoke-guiding plate (41) and the second smoke-guiding plate (42) can be at least in the following two states:

the first smoke guide plate (41) closes the first air inlet (11), the second smoke guide plate (42) closes the second air inlet (12), the end parts of the two smoke guide plates, which are close to each other, are respectively first end parts, the end parts of the two smoke guide plates, which are far away from each other, are respectively second end parts, and each first end part is restrained by the smoke collecting hood (1), and each second end part is a free end;

in an open state, at least one of the first smoke guide plate (41) and the second smoke guide plate (42) turns towards the inside of the smoke collecting hood (1) to open the corresponding air inlet.

2. The range hood of claim 1, wherein: the first and second smoke-guiding plates (41, 42) are lockable with the smoke-collecting hood (1) in a closed state and an open state.

3. The range hood of claim 2, wherein: each smoke guide plate is provided with a locking device (7) towards one side in the smoke collecting cover (1), the locking device (7) is provided with an outer lock tongue (74) close to the front side and/or the rear side of the smoke collecting cover (1), a first lock hole (165) and a second lock hole (166) are formed in corresponding positions of the smoke collecting cover (1), the first lock hole (165) is used for locking with the outer lock tongue (74) in the closed state of each smoke guide plate, and the second lock hole (166) is used for locking with the outer lock tongue (74) in the open state of each smoke guide plate.

4. The range hood of claim 1, wherein: the smoke collecting cover (1) is rotatably provided with a rotating shaft (45), a first end of the first smoke guide plate (41) is fixed with the corresponding rotating shaft (45) through a first connecting rod (461), a first end of the second smoke guide plate (42) is fixed with the corresponding rotating shaft (45) through a second connecting rod (462), and the rotating axis of the rotating shaft (45) extends in the front-rear direction.

5. The range hood of claim 4, wherein: the range hood further comprises a movement mechanism for driving the first smoke guide plate (41) and the second smoke guide plate (42) so that the first smoke guide plate (41) and the second smoke guide plate (42) can move synchronously or independently.

6. The range hood of claim 5, wherein: the motion mechanism comprises a first driving mechanism (63), a second driving mechanism (66) and a transmission mechanism, the transmission mechanism comprises a first gear (651), a second gear (652), a third gear (653) and a rack (654), the first gear (651) is arranged on the left side of the rack (654) and the second gear (652) is arranged on the right side of the rack (654), the first gear (651) and the second gear (652) are respectively fixed with one rotating shaft (45), and the third gear (653) can rotate relative to the fume collecting hood (1);

the first driving mechanism (63) is used for driving the rack (654) to lift, the second driving mechanism (66) is used for driving the first gear (651) or the second gear (652) to move back and forth, and when the first gear (651) and the second gear (652) are respectively meshed with the rack (654), the first driving mechanism (63) drives the rack (654) to lift and can simultaneously drive the first gear (651) and the second gear (652) to rotate, so that the two smoke guide plates can be driven to synchronously move; when the second driving mechanism (66) drives the first gear (651) or the second gear (652) to move away from the rack (654) to be meshed with the third gear (653), the two smoke guide plates independently move.

7. The range hood of claim 6, wherein: the smoke collecting hood (1) further comprises a front plate (161), a front lining plate (162), a rear lining plate (163) and a rear plate (164) which are sequentially arranged at intervals from front to back, a space between the front plate (161) and the front lining plate (162) is formed into a first interlayer (181), a space between the rear lining plate (163) and the rear plate (164) is formed into a second interlayer (182), and the first smoke guide plate (41) and the second smoke guide plate (42) are positioned between the front lining plate (162) and the rear lining plate (163), and the transmission mechanism is arranged in one interlayer.

8. The range hood of claim 1, wherein: the bottom surface of collection petticoat pipe (1) is the V font, the bottom surface of collection petticoat pipe (1) is including first curb plate (13) that are located the left side and second curb plate (14) that are located the right side, first curb plate (13) are from left to right decurrent gradually, second curb plate (14) are from left decurrent gradually, and the department of handing-over of two curb plates is the lowest position of collection petticoat pipe (1) bottom surface, first air intake (11) are seted up on first curb plate (13), second air intake (12) are seted up on second curb plate (14).

9. The range hood of claim 8, wherein: the right edge of the first air inlet (11) is higher than the right end part of the first side plate (13), and the left edge of the second air inlet (12) is higher than the left end part of the second side plate (14); the fume collecting hood (1) further comprises a bottom plate (17), the bottom plate (17) is arranged above the intersection of the first side plate (13) and the second side plate (14), the left side and the right side of the bottom plate (17) are lower than the lower edge of the corresponding air inlet, and a space between the two side plates of the fume collecting hood (1) below the bottom plate (17) is formed into an oil collecting groove (15).

10. The range hood of claim 9, wherein: the fan (3) comprises a volute (31) and an oil guide piece (34) arranged at the bottom of the volute (31), wherein the oil guide piece (34) is in a shape with a top surface recessed downwards, an oil guide groove (341) is formed in the oil guide piece (34), and the oil guide groove (341) can be communicated with the oil collecting groove (15).

11. The range hood of claim 10, wherein: the smoke collecting hood (1) further comprises a front plate (161), a front lining plate (162), a rear lining plate (163) and a rear plate (164) which are sequentially arranged at intervals from front to back, a space between the front plate (161) and the front lining plate (162) is formed into a first interlayer (181), a space between the rear lining plate (163) and the rear plate (164) is formed into a second interlayer (182), the first smoke guide plate (41) and the second smoke guide plate (42) are positioned between the front lining plate (162) and the rear lining plate (163), and the oil guide grooves (341) and the oil collecting grooves (15) are communicated with the same interlayer of the two interlayers.