CN110873345A - Fume exhaust fan - Google Patents

Abstract

The invention relates to a range hood, which comprises a smoke collecting hood provided with an air inlet, wherein the front side of the smoke collecting hood is provided with a smoke guide plate which is driven by a driving mechanism to move relative to the smoke collecting hood so as to open and close the air inlet, and the smoke guide plate comprises two first smoke guide plates which are respectively positioned at the left side and the right side and a second smoke guide plate which is positioned between the two first smoke guide plates; air intake open mode under, the second leads the cigarette board and is located first cigarette board front side, two first cigarette boards are in the coplanar and have the interval between the two, the second leads the cigarette board and forms main air intake between the first cigarette board of leading with adjacent on the left and right sides orientation, first cigarette board is on the left and right sides orientation and is formed supplementary air intake between the collection petticoat pipe. The main air inlet is close to the fan and has strong wind power, the auxiliary air inlet plays a role in preventing smoke leakage (escaping smoke is sucked by the auxiliary air inlet when moving along two sides of the smoke collecting cover), and the plurality of air inlets (namely the main air inlet and the auxiliary air inlet) are matched to achieve the optimal smoke suction effect.

Description

Fume exhaust fan

Technical Field

The invention relates to a household range hood, in particular to a range hood with a smoke guide plate.

Background

Most of the existing range hoods are provided with a smoke guide plate at an air inlet, and the smoke guide plate and the air inlet reserve a certain distance, so that the oil smoke can be effectively condensed and separated, and the oil absorption efficiency is relatively high.

For example, in the side-suction type range hood disclosed in the utility model with the patent number ZL201721255538.2 (publication number CN207196589U), the smoke guide plate is arranged in front of the air inlet.

Most of the existing smoke guide plates are shown in the above patents and are a whole plate, and the air inlet of the smoke guide plate is single, so that oil smoke far away from the air inlet is easy to escape, and the air inlet cannot be adjusted according to the use condition of the double cooking ranges; in addition, if the smoke guide plate is a large plane, the performance of the fan is stressed, more air quantity is lost, noise is high, the rapid oil smoke is poor in capture, and the oil smoke is easy to leak.

Although some patents are shown in a side-draft range hood disclosed in a chinese patent with a patent number ZL201611057819.7 (publication number CN108105813A), a left guide plate (i.e., a smoke guide plate), a right guide plate, and a fixed baffle plate located in the middle are disposed in the air inlet, and the left guide plate, the right guide plate, and the fixed baffle plate just cover the whole air inlet; or as shown in "a near-suction type range hood" disclosed in the chinese utility model patent No. ZL201721290304.1 (publication No. CN207214201U), the smoke guide plate of the range hood includes a first smoke guide plate movable on the left and right sides and a second smoke guide plate fixed between the two first smoke guide plates, and the first smoke guide plate can move in the inner direction or the outer direction of the housing.

Although aforementioned patent will lead the cigarette board segmentation design to the polylith, has solved the single problem of current air intake to a certain extent, but fixed stop and second lead the cigarette board still can oppress the fan, cause the performance of fan can not release completely, and the fan noise is big.

From the above, the smoke guide plate of the existing range hood still needs to be further improved.

Disclosure of Invention

The first technical problem to be solved by the invention is to provide a range hood which solves the problem of oppressing the performance of a fan by forming a plurality of air inlets between smoke guide plates aiming at the current situation of the prior art.

The second technical problem to be solved by the invention is to provide a range hood, aiming at the current situation of the prior art, wherein the smoke guide plate can move according to the use conditions of a single stove and a double stove, so that negative pressure is concentrated on one side of a working stove head.

The technical scheme adopted by the invention for solving the technical problems is as follows: a range hood comprises a smoke collecting hood provided with an air inlet, wherein the front side of the smoke collecting hood is provided with a smoke guide plate which is driven by a driving mechanism to move relative to the smoke collecting hood so as to open and close the air inlet, and the smoke guide plate comprises two first smoke guide plates which are respectively positioned at the left side and the right side and a second smoke guide plate which is positioned between the two first smoke guide plates;

the method is characterized in that: air intake open mode under, the second leads the cigarette board and is located first cigarette board front side, two first cigarette boards are in the coplanar and have the interval between the two, the second leads the cigarette board and forms main air intake between the first cigarette board of leading with adjacent on the left and right sides orientation, first cigarette board is on the left and right sides orientation and is formed supplementary air intake between the collection petticoat pipe.

In order to further improve the smoking effect, the second smoke guide plate partially covers at least one first smoke guide plate in the left-right direction under the open state. So first smoke deflector and second smoke deflector form staggered structure to when smoking, the oil smoke at first hits first smoke deflector, because the first smoke deflector of staggered structure plays fine drainage effect, can successfully guide the entering main air intake with the oil smoke.

In order to facilitate the formation of the main air inlet and the auxiliary air inlet, preferably, the main air inlet is formed by the driving mechanism driving the second smoke guide plate to extend forward, and the auxiliary air inlet is formed by the driving mechanism driving the first smoke guide plate to move left and right.

In order to reduce the number of the driving mechanisms, a set of driving mechanism is not required to be correspondingly arranged on each smoke guide plate, each driving mechanism comprises a driving device and a linkage mechanism arranged between the second smoke guide plate and the first smoke guide plate linked with the second smoke guide plate, and the driving device is connected with the first smoke guide plate in a driving mode. Only two sets of driving devices are arranged, so that the number of parts is small, and the cost is low.

The linkage mechanism can have multiple structural forms, preferably, the linkage mechanism comprises a first mounting seat, a connecting rod and a second mounting seat, the first mounting seat is arranged at the back of the first smoke guide plate, the second mounting seat is arranged at the back of the second smoke guide plate, the first mounting seat and the second mounting seat are respectively adjacent to two adjacent sides of the first smoke guide plate and the second smoke guide plate, the connecting rod extends along the left-right direction, the first end of the connecting rod is rotatably arranged on the first mounting seat, the second end of the connecting rod is rotatably arranged on the second mounting seat, and the connecting rod swings back and forth relative to the first smoke guide plate in a moving state of the first smoke guide plate.

In order to ensure that the first smoke guide plate is easy to push the second smoke guide plate when moving, the connecting rod has an inclination angle of 2-5 degrees relative to the back surface of the second smoke guide plate when the smoke guide plate is in a closed state. Because of the too small inclination angle, the moment is too large, which is not beneficial to the first smoke guiding plate to drive the second smoke guiding plate to move, and the too large inclination angle affects the beauty.

For the turned angle of restriction connecting rod, all be equipped with the turned angle of spacing connecting rod and be used for the spacing groove for giving the connecting rod abdication in the border department of first smoke deflector and second smoke deflector, the spacing groove corresponds the position setting at connecting rod place, and this spacing groove can also avoid when the connecting rod rotates to produce with first smoke deflector, second smoke deflector and interfere.

The driving device can have various structural forms, and preferably comprises a motor and a transmission mechanism connected with the output end of the motor and used for driving the first smoke guide plate to move left and right.

Drive mechanism can have multiple structural style, preferably, drive mechanism includes the gear that two at least intervals set up and drives and the driving strip of motion in the left right direction certain limit by the gear, and at least one gear is by motor drive, be equipped with the support on the collection petticoat pipe, motor and gear are all located on the support, the back of first smoke deflector is located to the driving strip, just the driving strip including be used for with the gear engaged with along the rack portion of left right direction extension. The transmission mechanism is simple in structure and can ensure that the first smoke guide plate operates stably.

When making the single kitchen use, the negative pressure can concentrate on the kitchen top of work, and each connecting rod department all corresponds and is equipped with locking Assembly, locking Assembly includes drive assembly and locates the retaining member of drive assembly output, the retaining member is located the position that first smoke deflector back or second smoke deflector back correspond the connecting rod to pin or release the connecting rod under the drive assembly effect. So, when using the single kitchen, use the right side kitchen range as an example, the left side limit of second smoke deflector is pinned and can not remove, the first smoke deflector translation of leading on right side promotes the right side limit antedisplacement of second smoke deflector, thereby make the second smoke deflector take place to deflect, form main air intake between the right side limit of second smoke deflector and the left side limit of first smoke deflector, form supplementary air intake between the right side limit of first smoke deflector and the collection petticoat pipe, so make the negative pressure concentrate on right side kitchen range one side, smoking effect is good.

Drive assembly can have multiple structural style, preferably, drive assembly includes the motor, by motor drive's lead screw, the motor is located on first smoke deflector or the second smoke deflector, the lead screw extend towards the connecting rod and with retaining member threaded connection, the opening towards the connecting rod that supplies the connecting rod card to go into has on the retaining member. The driving assembly is simple in structure, and the locking piece moves along the screw rod to the connecting rod to lock the connecting rod or move in the opposite direction to release the connecting rod.

The removal orbit for locking piece leads, improves its cooperation reliability with the connecting rod, be equipped with the mount on first smoke deflector or the second smoke deflector, the motor is fixed to be located on the mount, the locking piece is the U-shaped of opening towards the connecting rod, the diapire threaded connection of locking piece is on the lead screw, and the equal activity of both sides wall of the relative setting of locking piece is worn to locate on the mount. The locking piece is guided by the sliding fit of the two side walls of the locking piece and the fixing frame; in addition, the driving assembly is easily assembled on the first smoke guide plate or the second smoke guide plate due to the arrangement of the fixing frame, and the driving assembly can be installed on the fixing frame firstly and then integrally installed on the first smoke guide plate or the second smoke guide plate.

For the side-draft range hood, the smoke guide plates gradually incline backwards from top to bottom in a closed state, and the second smoke guide plate and the two first smoke guide plates are positioned on the same plane and cover the front side of the plane where the air inlet is positioned. So lead the cigarette board not only can regard as range hood's panel under the closed condition, still have better guide cigarette effect for the ceiling type range hood, because of to the side-draught type range hood, the oil smoke can be along leading cigarette board rebound, and it is longer to the water conservancy diversion process of oil smoke to lead the cigarette board, specifically does: the side-draft range hood is characterized in that air enters from the bottom, the running direction of air flow can generate a wall attachment effect along a smoke guide plate, the running direction of the air flow is upward, and a chimney effect can be generated; for the top-suction type range hood, the oil smoke is lifted to the smoke guide plate and is quickly sucked into the air inlet, and the flow guide process is short.

In order to prevent the smoke guide plate from interfering with the smoke collecting hood when the smoke guide plate moves, a certain distance is reserved between the smoke guide plate and the smoke collecting hood in the left-right direction.

In order to further improve the smoking effect, the width of the first smoke guide plate in the left-right direction accounts for 1/2-1 of the width of the second smoke guide plate in the left-right direction, when the width of the first smoke guide plate is smaller than 1/2 of the width of the second smoke guide plate, the second smoke guide plate is too wide, the distance between the main air inlet and the fan is far, and the negative pressure value is lower when the cigarette making machine works. When the width of the first smoke guide plate is larger than that of the second smoke guide plate, the performance of the fan cannot be completely released, the maximum air quantity is influenced, and the noise is increased.

Compared with the prior art, the invention has the advantages that: 1. according to the invention, the smoke guide plates are arranged into three blocks, the first smoke guide plates positioned on the left side and the right side can translate left and right, and the second smoke guide plate positioned in the middle can move forwards relative to the air inlet, so that a main air inlet is formed between the second smoke guide plate and the adjacent first smoke guide plate in the left-right direction, an auxiliary air inlet is formed between the first smoke guide plate and the smoke collecting hood in the left-right direction, the main air inlet is close to the fan and has strong wind power, the auxiliary air inlet plays a role in preventing smoke leakage (escaping smoke is sucked by the auxiliary air inlet when moving along the two sides of the smoke collecting hood), and the plurality of air inlets (namely the main air inlet and the auxiliary air inlet) are matched to achieve the optimal smoke suction effect; the second smoke guide plate moves forwards, so that the compression on the fan is avoided, the performance of the fan can be fully released, the maximum air quantity is increased, the smoking effect is improved, and the noise of the fan is reduced; 2. when the three plates move in place, the second smoke guide plate partially covers at least one first smoke guide plate in the left-right direction, so that the first smoke guide plate and the second smoke guide plate form a staggered structure; 3. according to the invention, through arranging the locking assembly, the air quantity can be reasonably utilized to the maximum extent according to the use states of the single stove and the double stoves, the negative pressure is scientifically distributed, and when the single stove is used, the negative pressure is concentrated on one side of the corresponding working single stove.

Drawings

FIG. 1 is a schematic structural view (with a smoke deflector in a closed state) of embodiment 1 of the present invention;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a schematic view of the smoke deflector of FIG. 1 in an open position;

FIG. 4 is a schematic structural view of the smoke guide plate of FIG. 3;

FIG. 5 is a schematic structural diagram of the driving device of FIG. 4;

FIG. 6 is an exploded view of FIG. 5;

FIG. 7 is a schematic structural view (single-cooker use state) of embodiment 2 of the present invention;

FIG. 8 is a schematic structural view of the smoke guide plate of FIG. 7;

fig. 9 is a schematic structural view of the locking assembly of fig. 8.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

Example 1

As shown in fig. 1 to 6, the range hood of the preferred embodiment includes a housing, a smoke collecting hood 1 provided with an air inlet 11, and a fan system, wherein the smoke collecting hood 1 is disposed at the front of the housing, the fan system is disposed in the housing, the air inlet 11 is communicated with the fan system, a plane 111 where the air inlet 11 is located is inclined from top to bottom gradually in a backward direction, and a smoke guide plate 2 capable of moving relative to the smoke collecting hood under the action of a driving mechanism to open and close the air inlet 11 is disposed at the front side of the smoke collecting hood 1.

In this embodiment, the smoke guide plate 2 includes two first smoke guide plates 21 respectively located at the left and right sides and a second smoke guide plate 22 located between the two first smoke guide plates 21, and the width of the first smoke guide plate 21 in the left-right direction is one-half of the width of the second smoke guide plate 22 in the left-right direction. The whole body inclines backwards from top to bottom when the smoke guide plate 2 is in a closed state, and the second smoke guide plate 22 and the two first smoke guide plates 21 are positioned on the same plane, so that the smoke guide plate 2 not only serves as a panel of the range hood, but also enables the range hood to be attractive as a whole. And the smoke guide plate 2 covers the front side of the plane 111 where the air inlet 11 is located, and has a certain distance between the smoke collecting hood 1 in the left-right direction, wherein the distance is greater than 3mm, so as to prevent the smoke guide plate 2 from interfering with the smoke collecting hood 1 when moving.

Under the open state of air intake 11, second smoke deflector 22 is located first smoke deflector 21 front side, and two first smoke deflector 21 are in the coplanar and have the interval between the two, and second smoke deflector 22 forms main air intake 23 between the adjacent first smoke deflector 21 in the left and right direction, and first smoke deflector 21 forms supplementary air intake 24 between left and right direction and collection petticoat pipe 1. The main air inlet 23 is formed by driving the second smoke guide plate 22 to extend forward by the driving mechanism, and the auxiliary air inlet 24 is formed by driving the first smoke guide plate 21 to move left and right by the driving mechanism. That is, the first smoke guide plate 21 and the second smoke guide plate 22 may be driven by a driving mechanism, respectively, or the first smoke guide plate 21 may serve as a driving plate, the second smoke guide plate 22 may serve as a driven plate linked with the first smoke guide plate 21, or the second smoke guide plate 22 may serve as a driving plate, and the first smoke guide plate 21 may serve as a driven plate linked with the second smoke guide plate 22.

In this embodiment, the specific operation processes of the first smoke guide plate 21 and the second smoke guide plate 22 are as follows: first smoke deflector 21 can be relatively air intake 11 left and right translation under the actuating mechanism effect, and second smoke deflector 22 and first smoke deflector 21 linkage can stretch out forward or reset backward relatively air intake 11 under first smoke deflector 21 effect, and under the state that smoke deflector 2 was opened, second smoke deflector 22 partially covered first smoke deflector 21 in the left and right direction to form the crisscross structure of three boards.

As shown in fig. 4 to 6, the driving mechanism includes a driving device 3 and a linkage mechanism 4 disposed between the second smoke guide plate 22 and the first smoke guide plate 21 linked therewith. As shown in fig. 5 and 6, the driving device 3 includes a motor 31 and a transmission mechanism connected to an output end of the motor 31 for driving the first smoke guide 21 to move left and right, the transmission mechanism includes three gears 32 arranged at intervals and a transmission bar 33 driven by the gears 32 to move within a certain range in the left and right direction, one of the gears 32 is driven by the motor 31 as a driving gear, and the other gears 32 are driven as driven gears.

The smoke collecting cover 1 is provided with a support 12, the motor 31 and the gear 32 are both arranged on the support 12, the end face of the support 12 corresponding to the first smoke guide plate 21 is provided with a guide groove 121, and the gear 32 is arranged in the guide groove 121. The power transmission bar 33 is provided on the back of the first smoke guide 21, and the power transmission bar 33 is provided with a rack 331 which engages with the gear 32 and extends in the left-right direction.

As shown in fig. 4, the linkage mechanism 4 includes a first mounting seat 41, a connecting rod 42 and a second mounting seat 43, the first mounting seat 41 is fixedly disposed on the back of the first smoke guide plate 21, the second mounting seat 43 is fixedly disposed on the back of the second smoke guide plate 22, the first mounting seat 41 and the second mounting seat 43 are respectively disposed adjacent to two adjacent sides of the first smoke guide plate 21 and the second smoke guide plate 22, and two ends of the connecting rod 42 are respectively rotatably mounted on the first mounting seat 41 and the second mounting seat 43. When the first smoke guide plate 21 moves horizontally, the connecting rod 42 rotates, and the connecting rod 42 is limited on the second mounting seat 43, so that the first smoke guide plate 21 swings back and forth.

In addition, the link 42 has an inclination angle of 2 to 5 ° with respect to the back surface of the second smoke guide 22 in the closed state of the smoke guide 2 so as to easily push the second smoke guide 22 when the first smoke guide 21 moves.

The limit grooves 211 are formed in the edges of the first smoke guide plate 21 and the second smoke guide plate 22, the limit grooves 211 are arranged at positions corresponding to the connecting rod 42, the rotating angle of the limit connecting rod 42 is used for yielding the connecting rod 42, and interference between the connecting rod 42 and the first smoke guide plate 21 and the second smoke guide plate 22 is avoided when the connecting rod 42 rotates.

The opening process of the smoke guide plate 2 is as follows: the motor 31 drives the driving gear 32 to rotate, and the rack portion 331 meshed with the driving gear 32 moves, so as to drive the first smoke guide plate 21 to move, and in the moving process of the first smoke guide plate 21, the driven gear 32 can be driven to rotate, so that the moving stability and the enough moving stroke of the first smoke guide plate 21 are ensured; and in the process of moving the first smoke guide plate 21, the connecting rod 42 rotates forwards to push the second smoke guide plate 22 to move forwards, and finally the second smoke guide plate 22 partially covers the right side of the left first smoke guide plate 21 and the left side of the right first smoke guide plate 21 in the left-right direction, so that a three-plate staggered structure is formed.

All form main air intake 23 between second smoke deflector 22 and two first smoke deflector 21, between the right side of the first smoke deflector 21 in the right side and the collection petticoat pipe 1, all form supplementary air intake 24 between the left side of the first smoke deflector 21 in a left side and the collection petticoat pipe 1, when smoking, the oil smoke at first hits two first smoke deflector 21 on, because two first smoke deflector 21 of staggered structure play fine drainage effect, can successfully guide the oil smoke into main air intake 23, main air intake 23 induced drafts vigorously, supplementary air intake 24 can prevent the cigarette of running, in order to reach best smoking effect.

In order to improve the operation stability of the first smoke guide plate 21 and the second smoke guide plate 22, a set of driving device 3 is arranged at the upper part and the lower part of the back surface of each first smoke guide plate 21, and two sets of linkage mechanisms 4 are arranged between each second smoke guide plate 22 and each first smoke guide plate 21 linked with the second smoke guide plate 22.

Example 2

As shown in fig. 7 to 9, example 2 is different from example 1 in that: the first smoke guiding plate 21 is provided with locking components 5 corresponding to the positions of the connecting rods 42, and each locking component 5 comprises a driving component and a locking component 51 arranged at the output end of the driving component. The first smoke guide plate 21 is provided with a fixing frame 212, the driving assembly is arranged on the fixing frame 212 and comprises a motor 52 and a lead screw 53 driven by the motor 52, and the lead screw 53 extends towards the connecting rod 42 and is in threaded connection with the locking piece 51. The retaining member 51 is provided with an opening 511 towards the connecting rod 42 for the connecting rod 42 to be clamped in, specifically, the retaining member 51 is in a U shape with the opening 511 towards the connecting rod 42, the bottom wall 513 of the retaining member 51 is in threaded connection with the screw rod 53, and the two oppositely arranged side walls 512 of the retaining member 51 are movably arranged on the fixing frame 212 in a penetrating manner. When the motor 52 drives the screw 53 to rotate, the locking member 51 moves along the screw 53, i.e., toward the link 42 until the link 42 is snapped into the opening 511, or moves in the opposite direction until the link 42 is disengaged from the opening 511.

For convenience of description, the first smoke guide plate 21 positioned on the left side is referred to as a left first smoke guide plate 21, and the first smoke guide plate 21 positioned on the right side is referred to as a right first smoke guide plate 21.

In the case of single-stove use, the right single-stove use is taken as an example. When smoke guide plate 2 is opened, retaining member 51 on the first smoke guide plate 21 in a left side pins the connecting rod 42 that corresponds, the first smoke guide plate 21 in the right side is translated left under the effect of drive arrangement 3 that corresponds, in this process, the connecting rod 42 that links to each other with the first smoke guide plate 21 in the right side rotates forward and drives second smoke guide plate 22 and take place to deflect (the right side of second smoke guide plate 22 deflects forward, the left side is locked and can not be moved by retaining member 51), form main air intake 23 between the right side of second smoke guide plate 22 and the first smoke guide plate 21 in the right side this moment, form supplementary air intake 24 between the right side of the first smoke guide plate 21 in the right side and the collection petticoat pipe, main air intake 23 wind-force is powerful, can swiftly smoke, supplementary air intake 24 can prevent to run the cigarette.

In the case of a double-stove use, there are two opening modes:

the first opening mode is as follows: all the locking assemblies 5 are not operated, and the smoke guide 2 is opened in the same manner as in embodiment 1. However, although this opening method can also be used to form a three-plate staggered structure, the movement path of the first smoke guide plate 21 and the second smoke guide plate 22 may be shifted during the movement, and the second opening method described below is preferred.

The second opening mode is as follows: when the smoke guide plate 2 is opened, the locking piece 51 on the left first smoke guide plate 21 locks the corresponding connecting rod 42, the right first smoke guide plate 21 moves leftwards under the action of the corresponding driving device 3, in the process, the connecting rod 42 connected with the right first smoke guide plate 21 rotates forwards to drive the second smoke guide plate 22 to deflect (the right side of the second smoke guide plate 22 moves forwards, the left side is locked by the locking piece 51 and cannot move), and when the connecting rod 42 is supported by the limiting groove 211, the right first smoke guide plate 21 moves in place; then the locking piece 51 on the first left smoke guide plate 21 releases the corresponding connecting rod 42, the first left smoke guide plate 21 translates to the right under the action of the corresponding driving device 3, in the process, the connecting rod 42 connected with the first left smoke guide plate 21 rotates forwards to drive the second smoke guide plate 22 to deflect (the left side of the second smoke guide plate 22 moves forwards), and when the rotating connecting rod 42 is supported by the limiting groove 211, the first left smoke guide plate 21 moves in place.

This twice motion has realized that first smoke deflector 21 in the right side translates left, and first smoke deflector 21 in a left side translates right, and second smoke deflector 22 wholly moves forward, and second smoke deflector 22 partly covers the right side of first smoke deflector 21 in a left and right sides, the left side of first smoke deflector 21 in the right side to form the crisscross structure of three boards. All form main air intake 23 between second smoke deflector 22 and two first smoke deflector 21, between the right side of the first smoke deflector 21 in the right side and the collection petticoat pipe, all form supplementary air intake 24 between the left side of the first smoke deflector 21 in a left side and the collection petticoat pipe, when smoking, the oil smoke at first hits two first smoke deflector 21 on, because two first smoke deflector 21 of staggered structure play fine drainage effect, can successfully guide the oil smoke and enter main air intake 23, main air intake 23 induced drafts by force, supplementary air intake 24 can prevent running the cigarette.

In addition, the smoke guide plate structure of the embodiment of the invention is not limited to be applied to the side-draft range hood, but also can be applied to the top-draft range hood, and only the structure of the smoke guide plate has better smoke guide effect when being applied to the side-draft range hood; for the top-suction type range hood, the oil smoke is lifted to the smoke guide plate and is quickly sucked into the air inlet, and the flow guide process is short.

Claims (15)

1. A range hood comprises a fume collecting hood (1) provided with an air inlet (11), wherein a fume guide plate (2) which moves relative to the fume collecting hood (1) under the driving of a driving mechanism to enable the air inlet (11) to be opened and closed is arranged on the front side of the fume collecting hood (1), and the fume guide plate (2) comprises two first fume guide plates (21) which are respectively positioned on the left side and the right side and a second fume guide plate (22) which is positioned between the two first fume guide plates (21);

the method is characterized in that: air intake (11) open mode under, second smoke deflector (22) are located first smoke deflector (21) front side, and two first smoke deflector (21) are in coplanar and have the interval between the two, second smoke deflector (22) form main air intake (23) between first smoke deflector (21) adjacent on the left and right sides orientation, first smoke deflector (21) form supplementary air intake (24) on the left and right sides orientation and between collection petticoat pipe (1).

2. The range hood of claim 1, wherein: the second smoke guide plate (22) partially covers at least one first smoke guide plate (21) in the left-right direction under the open state.

3. The range hood of claim 1 or 2, wherein: the main air inlet (23) is formed by driving the second smoke guide plate (22) to extend forwards through the driving mechanism, and the auxiliary air inlet (24) is formed by driving the first smoke guide plate (21) to move left and right through the driving mechanism.

4. The range hood of claim 3, wherein: the driving mechanism comprises a driving device (3) and a linkage mechanism (4) arranged between the second smoke guide plate (22) and the first smoke guide plate (21) linked with the second smoke guide plate, and the driving device (3) is connected with the first smoke guide plate (21) in a driving mode.

5. The range hood of claim 4, wherein: link gear (4) include first mount pad (41), connecting rod (42) and second mount pad (43), first smoke deflector (21) back is located in first mount pad (41), second smoke deflector (22) back is located in second mount pad (43), and first mount pad (41) and second mount pad (43) are close to first smoke deflector (21) and the adjacent both sides limit setting of second smoke deflector (22) respectively, connecting rod (42) extend along the left and right sides direction, and the first end of connecting rod (42) rotates and installs at first mount pad (41), and the second end of connecting rod (42) rotates and installs on second mount pad (43), connecting rod (42) are relative first smoke deflector (21) swing back and forth under the state that first smoke deflector (21) removed.

6. The range hood of claim 5, wherein: when the smoke guide plate (2) is in a closed state, the inclination angle of the connecting rod (42) relative to the back surface of the second smoke guide plate (22) is 2-5 degrees.

7. The range hood of claim 5, wherein: the edge of the first smoke guide plate (21) and the edge of the second smoke guide plate (22) are both provided with a limiting groove (211) for limiting the rotation angle of the connecting rod (42) and yielding the connecting rod (42).

8. The range hood of claim 4, wherein: the driving device (3) comprises a motor (31) and a transmission mechanism which is connected with the output end of the motor (31) and is used for driving the first smoke guide plate (21) to move left and right, and the transmission mechanism is arranged between the smoke collecting hood (1) and the first smoke guide plate (21).

9. The range hood of claim 8, wherein: drive mechanism includes gear (32) that two at least intervals set up and is driven and drive strip (33) of motion in the left and right sides direction certain limit by gear (32), and at least one gear (32) is driven by motor (31), be equipped with support (12) on collection petticoat pipe (1), the terminal surface of the first smoke deflector (21) of orientation of support (12) is located in gear (32), the back of first smoke deflector (21) is located in drive strip (33), just drive strip (33) including be used for with gear (32) mesh along rack portion (331) of left and right sides direction extension.

10. The range hood of claim 5, wherein: each connecting rod (42) department all corresponds and is equipped with locking Assembly (5), locking Assembly (5) are including drive assembly and retaining member (51) that can pin or release connecting rod (42), retaining member (51) link to each other with the drive assembly drive, just retaining member (51) are located first smoke deflector (21) back or second smoke deflector (22) back correspond the position of connecting rod (42).

11. The range hood of claim 10, wherein: drive assembly includes motor (52), lead screw (53) by motor (52) driven, first lead cigarette board (21) or second lead cigarette board (22) are located in motor (52), lead screw (53) extend and with retaining member (51) threaded connection towards connecting rod (42), opening (511) towards the connecting rod that confession connecting rod (42) card was gone into have on retaining member (51).

12. The range hood of claim 11, wherein: be equipped with mount (212) on first smoke deflector (21) or second smoke deflector (22), motor (52) are fixed to be located on mount (212), retaining member (51) are the U-shaped, diapire (513) threaded connection of retaining member (51) is on lead screw (53), and two lateral wall (512) equal activities of relative setting of retaining member (51) are worn to locate on mount (212), diapire (513) and two lateral wall (512) of retaining member (51) enclose into opening (511).

13. The range hood of claim 1, wherein: the smoke guide plate (2) is gradually inclined backwards from top to bottom in a closed state, and the second smoke guide plate (22) and the two first smoke guide plates (21) are positioned on the same plane and cover the front side of the plane (111) where the air inlet (11) is positioned.

14. The range hood of claim 13, wherein: the smoke guide plate (2) has a certain distance with the smoke collecting hood (1) in the left-right direction.

15. The range hood of claim 1, wherein: the width of the first smoke guide plate (21) in the left-right direction accounts for 1/2-1 of the width of the second smoke guide plate (22) in the left-right direction.

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