CN217441729U

CN217441729U - Fume exhaust fan

Info

Publication number: CN217441729U
Application number: CN202220536672.4U
Authority: CN
Inventors: 何立博
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2022-03-11
Filing date: 2022-03-11
Publication date: 2022-09-16
Anticipated expiration: 2032-03-11

Abstract

The utility model discloses a range hood, which comprises a smoke collecting hood and a fan frame arranged above the smoke collecting hood, wherein a main air inlet is arranged on the smoke collecting hood, a fixed filter screen is arranged at the position of the main air inlet, a smoke guide plate component is arranged below the fixed filter screen, and the smoke guide plate component comprises a main smoke guide plate; a movable filter screen is arranged below the fan system in the fan frame, and the smoke guide plate component also comprises a first auxiliary smoke guide plate and a second auxiliary smoke guide plate which are arranged at intervals from left to right; the first sliding rod moves left and right in the fan frame, the second sliding rod is in sliding fit with the first sliding rod and can move up and down relative to the first sliding rod, and the second sliding rod is fixed with the movable filter screen, so that the movable filter screen changes the distance between the movable filter screen and the fixed filter screen; the first auxiliary smoke guide plate and the second auxiliary smoke guide plate can be opened and closed on the main smoke guide plate or close the air inlet channels on the left side and the right side of the main smoke guide plate.

Description

Fume exhaust fan

Technical Field

The utility model relates to an oil smoke purifier, especially a range hood.

Background

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

The top-suction type range hood adopts an oil smoke rising principle, a negative pressure area is generated right above a cooking bench to suck and exhaust naturally rising oil smoke generated during cooking, and the range hood has the advantages of fashionable and concise appearance, larger air volume, larger space and capability of capturing the oil smoke far away from the cooking bench, and has the defects that the installation height is far away from the cooking bench, and the oil smoke above a pot is easy to be disturbed by ambient air to cause the escape of the oil smoke to the periphery under the cooking state with small oil smoke volume, so that the oil smoke suction effect is poor.

Therefore, a smoke guide plate is generally arranged below an air inlet of the top-suction range hood to form an annular suction structure, and the oil smoke suction effect is improved by utilizing the coanda effect. The top-suction type range hood with the smoke guide plate disclosed in chinese patent application No. 201410419676.4 includes a body, a smoke collecting hood and a smoke guide plate, wherein the smoke collecting hood is connected with the body, a fan is disposed in the body, an air inlet is disposed on the smoke collecting hood, the smoke guide plate is disposed opposite to the air inlet of the smoke collecting hood and fixed on the smoke collecting hood through a bracket or a buckle, and a distance is formed between the smoke guide plate and the smoke collecting hood to form a smoke channel.

Because the range hood adopting the smoke guide plate does not drip oil and has better oil smoke absorption effect, the range hood has more and more extensive application in recent years. The existing range hood adopting the smoke guide plate often has the following disadvantages:

1. when the traditional range hood is used on a common double stove, the difference between the smoke quantity generated by the quick-frying side and the soup cooking side is large, and the air quantity or the area of an air inlet cannot be adjusted to adapt to the cooking condition;

2. although the air inlet of some range hoods is adjusted along with the size of oil smoke, two sets of driving motors are generally needed to realize the adjustment respectively, so that the cost is high, the stability is poor, and the popularization difficulty is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to the not enough of above-mentioned prior art existence, provide a range hood, can realize that the distribution of air inlet region and resistance comes the adaptation culinary art condition, promote the oil absorption cigarette effect.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: a range hood comprises a smoke collecting hood, a fan frame arranged above the smoke collecting hood and a fan system arranged in the fan frame, wherein a main air inlet is formed in the smoke collecting hood, a fixed filter screen is arranged at the position of the main air inlet, a smoke guide plate assembly is arranged below the fixed filter screen and comprises a main smoke guide plate; the method is characterized in that:

a movable filter screen is arranged below the fan system in the fan frame, and the smoke guide plate component also comprises a first auxiliary smoke guide plate and a second auxiliary smoke guide plate which are arranged at left and right intervals;

the range hood also comprises a movement mechanism for driving the movable filter screen, the first auxiliary smoke guide plate and the second auxiliary smoke guide plate, wherein the movement mechanism comprises a first slide bar and a second slide bar, the first slide bar moves left and right in the fan frame, the second slide bar is in sliding fit with the first slide bar and can move up and down relative to the first slide bar and move left and right synchronously with the first slide bar, and the second slide bar is fixed with the movable filter screen, so that the movable filter screen performs combined movement of up and down movement and left and right movement, and the distance between the movable filter screen and the fixed filter screen is changed;

the first auxiliary smoke guide plate and the second auxiliary smoke guide plate can move up and down or turn over, so that the air inlet channels on the left side and the right side of the main smoke guide plate or the air inlet channels on the left side and the right side of the main smoke guide plate can be opened and closed.

In order to drive the second sliding rod to move conveniently, the moving mechanism further comprises a driving mechanism, a driving wheel and a connecting rod, the driving wheel is driven by the driving mechanism to rotate around an axis extending forwards and backwards, a disc-shaped cam groove is formed in the disc surface of the driving wheel, the connecting rod is in sliding fit with the disc-shaped cam groove, and the connecting rod is further in sliding fit with the second sliding rod and can move leftwards and rightwards relative to the second sliding rod.

The sliding fit of connecting rod and second slide bar is convenient for the sliding fit of first slide bar and second slide bar, set up the first spout that extends from top to bottom and the second spout that extends about the second slide bar, first slide bar and first spout sliding fit, connecting rod and second spout sliding fit.

In order to facilitate the arrangement of the driving wheel and limit the movement track of the first sliding rod in the fan frame, a fixing plate is further arranged on the inner side of the fan frame, the driving wheel is rotatably supported on the fixing plate, and the first sliding rod is in sliding fit with the fixing plate.

Preferably, in order to facilitate the sliding fit of the first sliding rod with the fixed plate and the second sliding rod respectively, the first sliding rod comprises a horizontal sliding rod extending from left to right and a longitudinal sliding rod extending from top to bottom, the horizontal sliding rod is in sliding fit with the fixed plate, and the longitudinal sliding rod is in sliding fit with the second sliding rod.

According to the utility model discloses an aspect, the supplementary air intake of first supplementary air intake and second has been seted up on the main smoke guide, first supplementary air intake sets up the left side at the supplementary air intake of second with the interval, the air intake duct on the main smoke guide is constituteed to the supplementary air intake of first supplementary air intake and second, first supplementary smoke guide corresponds with first supplementary air intake to can open and close first supplementary air intake through the motion of going up and down, the supplementary smoke guide of second corresponds with the supplementary air intake of second, thereby can open and close the supplementary air intake of second through the motion of going up and down.

In order to simplify the structure, the movable filter screen and the auxiliary smoke guide plate share one driving mechanism, the stability of the movement mechanism is improved, the driving wheel is a gear, the movement mechanism further comprises a first pressure lever, a second pressure lever, a first rack and a transmission rod, the first rack and the driving wheel are meshed and can move left and right, the transmission rods are arranged at intervals left and right, the first rack can push one of the transmission rods to move in the direction away from the other transmission rod, the first pressure levers are two, each first pressure lever is fixed and linked with the transmission rod at the corresponding position, the second pressure levers are two and are respectively arranged on the left side and the right side in the fan frame, the second pressure levers longitudinally extend and extend downwards below the main air inlet, each second pressure lever corresponds to one auxiliary smoke guide plate, and when the first pressure lever moves in the direction away from the other first pressure lever, the second pressure levers can be pushed to move downwards, thereby drive corresponding supplementary cigarette board and move down and open corresponding supplementary air intake, and every supplementary cigarette board keeps the trend that upwards moves and close corresponding supplementary air intake.

In order to facilitate the resetting of the auxiliary smoke guide plates, each auxiliary smoke guide plate is connected with the position, located at the periphery of the corresponding auxiliary air inlet, of the main smoke guide plate through a connecting column, each auxiliary smoke guide plate is in sliding connection with the connecting column, and a first elastic part is arranged on the connecting column, so that each auxiliary smoke guide plate keeps the trend of moving upwards to close the corresponding auxiliary air inlet.

Preferably, the first elastic piece is sleeved on the periphery of the connecting column, the lower end part of the connecting column forms a head part of the connecting column, and two ends of the first elastic piece are respectively abutted against the head part of the connecting column and the lower surface of the corresponding auxiliary smoke guide plate.

In order to facilitate the left and right movement of the first pressure lever to drive the second pressure lever to move downwards, the first pressure lever is bent, one part of the first pressure lever extends along the left and right direction, the other part of the first pressure lever extends along the front and back direction after being bent, the bottom surface of the part extending front and back of the first pressure lever is inclined and gradually inclines upwards from one side close to one side away from the other side, and the upper end of the second pressure lever can be matched with the part extending front and back of the first pressure lever at the corresponding position, so that the first pressure lever can push the second pressure lever to move downwards.

According to the utility model discloses a further aspect, first supplementary cigarette board that leads rotates to be connected in leading cigarette board left side, the supplementary cigarette board that leads of second rotates to be connected on leading cigarette board right side, the supplementary cigarette board homoenergetic of first supplementary cigarette board and second is rotated around the axis that extends.

In order to simplify the structure, the movable filter screen and the auxiliary smoke guide plate share one driving mechanism, the stability of the movement mechanism is improved, the driving wheel is a gear, the movement mechanism further comprises a first pressure rod, a second pressure rod, a first rack, two transmission rods and two pushing blocks, the first rack and the driving wheel are meshed and can move left and right, the two transmission rods are arranged at intervals left and right, the first rack can push one of the transmission rods to move towards the direction far away from the other transmission rod, the second pressure rods are provided with two left and right sides which are respectively arranged in the fan frame, the first pressure rods are provided with two first pressure rods, each first pressure rod is fixed with the transmission rod at the corresponding position and linked, the second pressure rods longitudinally extend downwards to the lower part of the main air inlet, each second pressure rod corresponds to one pushing block, the pushing blocks are arranged on the main smoke guide plate, and can push the second pressure rods to move downwards when the first pressure rods move towards the direction far away from the other first pressure rods, when the second pressure lever moves downwards, the pushing block can be pushed to move towards the direction far away from the other pushing block, so that the corresponding auxiliary smoke guide plates are driven to rotate, and each auxiliary smoke guide plate is kept open to be in a flattening trend.

In order to facilitate the downward movement of the second pressure lever to drive the pushing block to move left and right, the lower end face of the second pressure lever gradually inclines upwards from one end close to the lower end face of the second pressure lever to one end far away from the lower end face of the second pressure lever, and the upper end face of the pushing block gradually inclines upwards from one end close to the upper end face of the pushing block to one end far away from the lower end face of the pushing block, so that the second pressure lever can push the pushing block to move.

In order to convert the linear motion of the pushing block into the rotation of the auxiliary smoke guide plates, the motion mechanism further comprises racks arranged on the upper surface of the main smoke guide plate, transmission gears meshed with the racks and transmission shafts in rotary connection with the main smoke guide plate, the transmission shafts can rotate around axes extending forwards and backwards, the racks extend in the left-right direction, each auxiliary smoke guide plate corresponds to one rack and one transmission shaft, the pushing blocks are arranged at the end parts of the racks close to each other, the pushing blocks and the racks move synchronously, and the transmission gears are arranged on the transmission shafts in a winding manner and can rotate synchronously; each auxiliary smoke guide plate is connected and fixed with the transmission shaft on the corresponding side and can synchronously rotate.

In order to facilitate the automatic resetting of the auxiliary smoke guide plate, the motion mechanism further comprises two supports and an elastic member, the two supports are arranged between the two pushing blocks, each support corresponds to one pushing block, the elastic member is connected between each support and the corresponding pushing block, and the elastic member applies force to the pushing blocks to keep the pushing blocks in a trend of moving towards the supports, so that the corresponding auxiliary smoke guide plate is kept in a flat-open trend.

Compared with the prior art, the utility model has the advantages of: the movable filter screen capable of adjusting the distance between the double-layer filter screens to adjust the resistance and the auxiliary second-stage smoke guide plate capable of being turned or lifted are arranged, flow distribution can be achieved through turning or lifting of the second-stage smoke guide plate, the oil filtering capability can be further adjusted by matching with the change of the distance between the double-layer screens, and the use in multiple scenes is met; the moving of the filter screen and the overturning or lifting of the second-stage smoke guide plate are realized through a set of motion mechanism, the stability is high, and the cost is low.

Drawings

Fig. 1 is a schematic view of a range hood according to a first embodiment of the present invention in a first state;

fig. 2 is a sectional view of a range hood according to a first embodiment of the present invention in a first state;

FIG. 3 is a schematic view of a dynamic filter screen, a smoke deflector assembly and a movement mechanism thereof of the range hood of FIG. 2;

FIG. 4 is an exploded view of the dynamic filter screen and its moving mechanism of FIG. 3;

FIG. 5 is an exploded view of the smoke guide plate assembly and its movement mechanism of FIG. 3 (hiding the structure on the main smoke guide plate connected to the smoke collection hood);

fig. 6 is a schematic view of a partially exploded structure of a smoke guide plate assembly of a range hood according to a first embodiment of the present invention;

fig. 7 is a sectional view of the range hood according to the first embodiment of the present invention in a second state;

fig. 8 is a schematic diagram of the dynamic filter screen, the smoke guide plate assembly and the moving mechanism thereof of the range hood in fig. 7 (hiding the structure connected with the smoke collecting hood on the main smoke guide plate);

fig. 9 is a sectional view of the range hood according to the first embodiment of the present invention in a third state;

fig. 10 is a schematic diagram of the dynamic filter screen, the smoke guide plate assembly and the moving mechanism thereof of the range hood in fig. 9 (hiding the structure connected with the smoke collecting hood on the main smoke guide plate);

fig. 11 is a cross-sectional view of the range hood according to the first embodiment of the present invention in a fourth state;

fig. 12 is a schematic diagram of the dynamic filter screen, the smoke guide plate assembly and the moving mechanism thereof of the range hood in fig. 11 (hiding the structure connected with the smoke collecting hood on the main smoke guide plate);

fig. 13 is a cross-sectional view of the range hood according to the first embodiment of the present invention in a fifth state;

FIG. 14 is a schematic view of the dynamic filter screen, the smoke deflector assembly and the moving mechanism thereof of the range hood of FIG. 12;

fig. 15 is a schematic view of a range hood according to a second embodiment of the present invention in a first state;

fig. 16 is a sectional view of a range hood according to a second embodiment of the present invention in a first state;

FIG. 17 is a schematic view of a dynamic filter screen, a smoke deflector assembly and its movement mechanism of the range hood of FIG. 16;

FIG. 18 is an exploded view of the smoke guide plate assembly of FIG. 17 and its movement mechanism;

fig. 19 is a schematic view of a range hood according to a second embodiment of the present invention in a second state;

fig. 20 is a sectional view of a range hood according to a second embodiment of the present invention in a second state;

FIG. 21 is a schematic view of the dynamic filter screen, the smoke deflector assembly and the moving mechanism thereof of the range hood of FIG. 20;

fig. 22 is a schematic view of a range hood according to a second embodiment of the present invention in a third state;

fig. 23 is a sectional view of a range hood according to a second embodiment of the present invention in a third state;

FIG. 24 is a schematic view of the dynamic filter screen, the smoke deflector assembly and the moving mechanism thereof of the range hood of FIG. 23;

fig. 25 is a sectional view of a range hood according to a second embodiment of the present invention in a fourth state;

FIG. 26 is a schematic view of the dynamic filter screen, the smoke deflector assembly and the moving mechanism thereof of the range hood of FIG. 25;

fig. 27 is a schematic view of a range hood according to a second embodiment of the present invention in a fifth state;

fig. 28 is a cross-sectional view of a range hood according to a second embodiment of the present invention in a fifth state;

FIG. 29 is a schematic view of the dynamic filter screen, the smoke deflector assembly and the moving mechanism thereof of the range hood of FIG. 28;

fig. 30 is a schematic view of a range hood according to a second embodiment of the present invention in a sixth state;

fig. 31 is a sectional view of a range hood according to a second embodiment of the present invention in a sixth state;

fig. 32 is a schematic view of the dynamic filter screen, the smoke guide plate assembly and the moving mechanism thereof of the range hood in fig. 31.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like 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 invention, it is to 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," and the like are used in a generic and descriptive sense only and not for purposes of limitation, as the disclosed embodiments of the invention may be oriented in different directions and the directional terms are intended to be illustrative and should not be construed as limiting, such as "upper" and "lower" are not necessarily limited to directions opposite to or coincident with the direction of gravity. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

Example one

Referring to fig. 1 to 6, a range hood is a top-suction range hood, and includes a smoke collecting hood 1 and a fan frame 2 disposed above the smoke collecting hood 1, and a fan system 3 is disposed in the fan frame 2. The smoke collecting cover 1 is provided with a main air inlet 11, so that the oil smoke can enter the fan frame 2 from the main air inlet 11 in the upward rising process and is discharged by the fan system 3. The bottom of the fume collecting hood 1 is upwards sunken to form a fume collecting cavity 12, and the main air inlet 11 is positioned at the top of the fume collecting cavity 12.

A movable filter 4 is disposed in the fan frame 2 below the fan system 3, i.e., on the lampblack flow path and upstream of the fan system 3, and the movable filter 4 is preferably flat and extends transversely and is movable inside the fan frame 2. The movable filter screen 4 is a plate with mesh holes, can change resistance, and can move inside the fan frame 2. The dynamic strainer 4 is provided with mesh openings 41, preferably so that the dynamic strainer 4 forms a grid net. The width of the movable filter screen 4 in the left-right direction is smaller than that of the fan frame 2 in the left-right direction.

The main air inlet 11 is provided with a fixed filter screen 5, and the movable filter screen 4 is located at the downstream of the fixed filter screen 5, i.e. the movable filter screen 4 is located between the fixed filter screen 5 and the fan system 3. The fixed screen 5 is in the present embodiment in the form of an inverted cone with a smaller bottom and a larger top, and alternatively, may be in the form of another existing screen. The movable filter screen 4 can move in the fan frame 2, so that the distance between the two and the relative position in the left-right direction are changed relative to the fixed filter screen 5.

A smoke guide plate component is arranged below the fixed filter screen 5 and comprises a main smoke guide plate 61, a first auxiliary smoke guide plate 62 and a second auxiliary smoke guide plate 63. The main smoke guiding plate 61 is provided with a first auxiliary air inlet 611 and a second auxiliary air inlet 612, the two auxiliary air inlets are arranged at a left-right interval, and the first auxiliary air inlet 611 is located at the left side of the second auxiliary air inlet 612. The first auxiliary smoke guide plate 62 corresponds to the first auxiliary air inlet 611, and can open and close the first auxiliary air inlet 611 through the lifting movement, and the second auxiliary smoke guide plate 63 corresponds to the second auxiliary air inlet 612, and can open and close the second auxiliary air inlet 612 through the lifting movement.

The fan frame 2 is also internally provided with a movement mechanism for driving the movable filter screen 4 and two auxiliary smoke guide plates of the smoke guide plate assembly to move, the movement mechanism is positioned between the fan system 3 and the fixed filter screen 5, and the movement mechanism for driving the movable filter screen 4 comprises a first sliding rod 71, a second sliding rod 72, a driving wheel 73, a connecting rod 74, a fixed plate 75 and a driving mechanism 76. The driving wheel 73 is rotatably disposed inside the fan frame 2, and may be directly connected to the fan frame 2 or indirectly connected thereto. As in the present embodiment, a fixed plate 75 is provided on the rear side in the blower frame 2, and the drive pulley 73 is rotatably supported on the fixed plate 75. The rotational axis of the capstan 73 extends in the front-rear direction. The driving mechanism 76 is used for driving the driving wheel 73 to rotate, and preferably, the driving mechanism 76 is a motor, and an output end of the driving mechanism can be in transmission connection with the driving wheel 73.

The driving wheel 73 is a gear in the present embodiment, the moving screen 4 is disposed at the front side of the driving wheel 73, a disc-shaped cam groove 731 is formed on the disc surface of the driving wheel 73 facing the moving screen 4, and the disc-shaped cam groove 731 is formed by recessing the disc surface of the driving wheel 73 in a direction away from the moving screen 4. Alternatively, the driving wheel 73 may be a disk type cam. The link 74 is slidably connected to the disc-shaped cam groove 731 so as to be slidable along the disc-shaped cam groove 731.

The first slide bar 71 includes a transverse slide bar 711 extending in the lateral direction and a longitudinal slide bar 712 extending in the vertical direction, wherein the transverse slide bar 711 extends in the left-right direction, the transverse slide bar 711 and the longitudinal slide bar 712 are integrally formed, and the longitudinal slide bar 712 may be located at one end of the transverse slide bar 711. The transverse slide bar 711 is slidably engaged with the fixed plate 75, thereby defining the movement locus of the first slide bar 71 to move in the left-right direction. If the fixed plate 75 is provided with the guide post 751, the transverse slide bar 711 is provided with the guide slot 713, and the fixed plate 75 limits the motion trail of the first slide bar 71 and can only move in the left-right direction through the sliding fit of the guide post 751 and the guide slot 713.

The second sliding rod 72 is provided with a first sliding slot 721 extending vertically and a second sliding slot 722 extending laterally (extending laterally in the left-right direction), and the second sliding slot 722 is located above the first sliding slot 721. Preferably, the longitudinal sliding rod 712 can be T-shaped, and the first sliding slot 721 is opened on the longitudinal portion of the T-shaped, and the second sliding slot 722 is opened on the transverse portion of the T-shaped. The longitudinal slide bar 712 of the first slide bar 71 is slidably connected with the first slide slot 721 of the second slide bar 72, so that the second slide bar 72 can move relatively in the up-down direction with respect to the first slide bar 71. The link 74 is also slidably engaged with the second slide slot 722, so that the link 74 and the second slide rod 72 can move relatively in the left-right direction. The second slide bar 72 is fixed to the moving screen 4, and for example, a T-shaped lower end of the second slide bar 72 may be fixed to a rear end of the moving screen 4.

When the driving wheel 73 is driven to rotate by the driving mechanism 76, the connecting rod 74 can be driven to slide along the disk-shaped cam groove 731 at the position where the connecting rod 74 is connected with the driving wheel 73, and the connecting rod 74 rotates in a non-fixed axis manner, so that the movement of the connecting rod 74 can drive the second sliding rod 72 to perform compound movement in the up-down direction and the left-right direction (the track is limited by the first sliding rod 71), and further drive the movable filter screen 4 to perform the same compound movement, and the track is similar to a triangle.

In the present embodiment, the part of the movement mechanism for driving the two auxiliary smoke guide plates of the smoke guide plate assembly has a common feature with the part for driving the dynamic filter 4. The moving mechanism further includes a first pressing lever 77, a second pressing lever 78, a first rack 79, and a transmission lever 80, wherein the first rack 79 is engaged with the driving wheel 73 and is slidably engaged with the fixed plate 75 so that the first rack 79 can move in the left-right direction when the driving wheel 73 rotates. The fixed plate 75 and the first rack 79 may be slidably engaged by a guide mechanism such as a slide rail or a slide groove. The drive link 80 is also slidably engaged with the fixed plate 75 or other fixed component within the fan frame 2, such as by a plate member separate from the fixed plate 75 and movable in a left-right direction in this embodiment, in a manner known in the art, such as the engagement of the fixed plate 75 with the first rack 79 as described above. The transmission rods 80 are provided in two and spaced left and right, and each transmission rod 80 is in a T-shape in this embodiment, and has a longitudinal portion whose lower end portion is engaged with the first rack 79 and is pushed by the first rack 79 to move away from the other transmission rod 80, and a transverse portion slidably engaged with the fixing plate 75 or other fixing member. In order to facilitate the first rack 79 to push the transmission rod 80, a protrusion 791 is formed at the top of the first rack 79, and the top of the protrusion 791 is not lower than the bottom of the transmission rod 80, so that the transmission rod 80 can be pushed to move left and right when moving left and right, and specifically, the first rack 79 pushes the transmission rod 80 on the left side to move left and pushes the transmission rod 80 on the right side to move right.

The first pressing rods 77 are two, each of the first pressing rods 77 is fixed to and interlocked with one of the transmission rods 80, the first pressing rods 77 are bent, one portion of each of the first pressing rods extends in the left-right direction, the other portion of each of the first pressing rods 77 extends in the front-rear direction after being bent, preferably, the first pressing rods 77 are L-shaped, and the two first pressing rods 77 are symmetrically arranged. The bottom surface of the portion of the first presser bar 77 extending forward and rearward is inclined, and is gradually inclined upward from the side close to each other to the side away from each other. The second struts 78 likewise have two, one on each of the left and right sides in the fan frame 2, and the second struts 78 can be rod-shaped, extend in the longitudinal direction, particularly preferably in the vertical direction, and extend downward below the main air inlet 11. The upper end of the second pressing rod 78 can be matched with the front and back extending part of the first pressing rod 77 at the corresponding position, and the upper end surface of the second pressing rod 78 is in an inclined shape matched with the first pressing rod 77. Thus, when the first pressing rod 77 moves, the second pressing rod 78 can be pushed to move downwards. The second strut 78 can pass through the fixed screen 5.

The lower end of each second pressing rod 78 corresponds to the position of one of the auxiliary smoke guide plates, so that the auxiliary smoke guide plate at the corresponding position can be pushed downwards when the second pressing rod 78 moves downwards.

In order to facilitate that the first auxiliary smoke guide plate 62 and the second auxiliary smoke guide plate 63 can automatically reset upwards after the external force disappears after being pushed downwards, the auxiliary smoke guide plates and the main smoke guide plate 61 are connected in a mode that each auxiliary smoke guide plate is connected with the position, located at the periphery of the corresponding auxiliary air inlet, of the main smoke guide plate 61 through a connecting column 64, each auxiliary smoke guide plate is in sliding connection with the connecting column 64, and therefore the connecting column 64 can also play a role in guiding the up-and-down movement of each auxiliary smoke guide plate. The connecting column 64 is provided with a first elastic member 65, such as a spring, which is sleeved on the outer periphery of the connecting column 64, and the lower end of the connecting column 64 forms a connecting column head 641, whose radial dimension is larger than the rest of the connecting column 64 so as to be able to be used as a spring seat, and two ends of the first elastic member 65 are respectively abutted against the connecting column head 641 and the lower surface of the corresponding auxiliary smoke guide plate. When one of the auxiliary smoke guide plates is pushed downwards, the first elastic member 65 is compressed along with the movement of the auxiliary smoke guide plate, and when the force applied by the second pressure lever 78 on the auxiliary smoke guide plate disappears (the second pressure lever 78 moves upwards), the auxiliary smoke guide plate moves upwards and resets under the action of the restoring force of the first elastic member 65, and the corresponding auxiliary air inlet is closed.

In this embodiment, the movable filter screen 4 and the auxiliary smoke guide plate are linked by a driving mechanism 76 combined with a rack, a press rod, etc., alternatively, the movable filter screen 4 and the auxiliary smoke guide plate may be independently driven by two or three sets of driving mechanisms 76 to move up and down, move left and right, and at this time, the driving mechanism 76 is correspondingly adapted by selecting a linear driving mechanism or a rotary driving mechanism.

In the practical use process, the condition of frying on one side of the kitchen range under the range hood is more, but the other side is not used or has no smoke, and the cooking state can be switched between big smoke and small smoke. The oil filtering capability and the resistance are a pair of related contradictions, and the common range hood is difficult to consider both the oil filtering capability and the resistance, but in the invention, the gap between the filter screens 5 can be adjusted and fixed according to the oil smoke condition under working conditions through the movement of the movable filter screen 4, so that the resistance and the oil filtering capability are changed, the contradiction that large oil smoke needs large air volume and oil filtering can be temporarily ignored is solved, small oil smoke needs to be mainly solved, the effect that the large oil smoke preferentially ensures oil smoke absorption is realized, and the small oil smoke preferentially ensures oil filtering is realized. The side with oil smoke is opened and the uncooked side is closed by the movement of the auxiliary smoke guide plate.

In the invention, the large oil fume and the small oil fume refer to the actual working state flow of the range hood installed at the home of a user, the flow can be defined according to the laboratory test condition, and the preferable dividing line of the flow can be 6-10 m ³ And/min. According to the difference between different on-hook heights and machine types, for example, the ceiling type range hood is installed according to the standard (the installation range is 650-750mm defined by the national standard), the flow limit of 700mm from the platform surface may be 9m ³ And when the mounting height thereof is adjusted to 750mm, the boundary thereof needs to be lifted up to 10m ³ The oil smoke escape is reduced.

Referring to fig. 11 and 12, if the left side is in a situation of cooking with a large amount of oil smoke, the driving wheel 73 drives the first rack 79 to move leftward, and the first pressing rod 77 on the left side presses the second pressing rod 78 on the left side, so that the first auxiliary smoke guide plate 62 overcomes the position of the elastic portion of the first elastic member 65, and the first auxiliary air inlet 611 on the left side is opened, so that the left side is a main air inlet channel, and the opening of the first auxiliary air inlet 611 on the left side can increase a portion of oil smoke, and at this time, the gap between the movable filter screen 4 and the fixed filter screen 5 is large. Vice versa, see fig. 2.

Referring to fig. 13 and 14, if a large oil smoke cooking situation scene is used on the left side, the driving wheel 73 drives the first rack 79 to move to the left, the first pressing rod 77 on the left side presses the second pressing rod 78 on the left side, so that the first auxiliary smoke guide plate 62 overcomes the maximum position of the elastic force of the first elastic member 65, the first auxiliary air inlet 611 on the left side is opened, the left side is a main air inlet channel, a part of oil smoke can be added by opening the first auxiliary air inlet 611 on the left side, at this time, the gap between the movable filter screen 4 and the fixed filter screen 5 is large, and the oil smoke absorption effect is preferred.

Referring to fig. 7 and 8, under the condition that cooking states of the left side and the right side are almost the same, and when the cooking states are large oil smoke, the driving wheel 73 drives the movable filter screen 4 to move to a larger gap between the movable filter screen and the fixed filter screen 5, at the moment, the oil smoke is preferentially absorbed, the oil smoke is fully exhausted, the index of complete suction is improved, the two auxiliary smoke guide plates are both in the closed position, the channels on the two sides are ensured to be consistent, and the negative pressure is expanded more outwards relative to the common range hood (the two auxiliary air inlets are not opened, the pressure is not released, and the edge negative pressure is improved).

Referring to fig. 9 and 10, under the condition that cooking states of the left side and the right side are almost the same, and when small oil smoke exists, the driving wheel 73 drives the movable filter screen 4 to move to a smaller gap between the movable filter screen and the fixed filter screen 5, oil filtering is performed preferentially at the moment, oil filtering is performed fully, the oil separation degree index is improved, the two auxiliary smoke guide plates are both in the closed position, the two side channels are ensured to be consistent, and the negative pressure is expanded outwards relative to a common range hood (the two auxiliary air inlets are not opened, pressure is not released, and the edge negative pressure is improved).

Example two

Referring to fig. 15 to 19, in the present embodiment, the difference from the first embodiment is that a first auxiliary smoke guide plate 62 'is rotatably disposed on the left side of the main smoke guide plate 61, and a second auxiliary smoke guide plate 63' is rotatably disposed on the right side of the main smoke guide plate 61, each of which is rotatable about an axis extending forward and backward.

The moving mechanism of the range hood further comprises a second rack 81, a transmission gear 82, a second elastic member 83 and a pushing block 84. The second rack 81 is provided on the upper surface of the main smoke guide 61, and the first auxiliary smoke guide 62 'and the second auxiliary smoke guide 63' correspond to one second rack 81, respectively, and the second rack 81 extends in the left-right direction. The ends of the second racks 81 close to each other are provided with the above-mentioned pushing blocks 84, and the upper end surfaces of the pushing blocks 84 are engaged with the lower end surfaces of the second pressing rods 78. The lower end surface of the second pressing rod 78 is gradually inclined upward from the end close to each other to the end far away from each other, and the upper end surface of the pushing block 84 is also gradually inclined upward from the end close to each other to the end far away from each other. Therefore, when the second pressing rod 78 is pushed downwards, the pushing block 84 can be pushed to move away from the other pushing block 84, so as to drive the second rack 81 to move away from the other second rack 81. The transmission gears 82 are meshed with the second racks 81, and can be arranged on the upper surface of the main smoke guide plate 81 close to the left side and the right side, and each transmission gear 82 corresponds to one second rack 81, so that when the second racks 81 move leftwards or rightwards, the transmission gears 82 can be driven to rotate, and the corresponding auxiliary smoke guide plates are closed.

The upper surface of the main smoke guiding plate 61 is provided with brackets 85 at positions close to the left side and the right side, respectively, and the brackets 85 are provided with transmission shafts 86, wherein the transmission shafts 86 extend in the front-rear direction and can rotate around the axes of the transmission shafts relative to the brackets 85. The transmission gear 82 is sleeved on the periphery of the transmission shaft 86 and is fixedly connected, so that the transmission gear 82 can drive the transmission shaft 86 to rotate. The first auxiliary smoke guide plate 62 'and the second auxiliary smoke guide plate 63' are respectively connected with the transmission shaft 86 at corresponding positions, thereby being capable of rotating along with the transmission shaft 86. In the present embodiment, the first auxiliary smoke guide plate 62 'and the second auxiliary smoke guide plate 63' are respectively connected with the transmission shaft 86 through the shaft sleeve 66.

The second elastic member 83 is preferably a spring in this embodiment, and the moving mechanism further includes two support seats 87, the two support seats 87 are disposed between the two pushing blocks 84, and each support seat 87 corresponds to one pushing block 84. The second elastic member 83 described above is connected between each support 87 and the corresponding pusher block 84. The force exerted by the second elastic member 83 on the pushing block 84 keeps it tending to move towards the seat 87, thereby keeping the corresponding auxiliary smoke guide plate open (flattened, horizontal or near horizontal). After the auxiliary smoke guide plate is closed by being stressed, when the external force disappears (in this embodiment, the force applied to the pushing block 84 by the first rack 79 through the first pressing rod 77 and the second pressing rod 78 is the force), the pushing block 84 is reset under the action of the second elastic member 83, so that the auxiliary smoke guide plate, the second pressing rod 78 and the first pressing rod 77 are reset.

The first pressure lever 77 presses the second pressure lever 78 to overcome the spring force and drive the left and right auxiliary smoke guide plates to turn over through gear and rack transmission, and the angle can be accurately controlled.

In this embodiment, the movable filter screen 4 and the auxiliary smoke guide plate are linked by a driving mechanism 76 combined with a rack, a slide bar, etc., alternatively, the movable filter screen 4 and the auxiliary smoke guide plate may be independently driven by two or three sets of driving mechanisms 76 to move up and down, move left and right, and at this time, the driving mechanism 76 is correspondingly adapted by selecting a linear driving mechanism or a rotary driving mechanism.

Referring to fig. 16 and 17, in a cooking situation with a large oil smoke on the right side, the driving wheel 73 drives the first rack 79 to move leftward, the first pressing rod 77 on the left side presses the second pressing rod 78 on the left side, so that the first auxiliary smoke guide plate 62' overcomes the elastic force of the second elastic member 83 to inwardly fold and turn over by 90 ° to close the left side channel, so that the right side is a main air inlet channel, and at this time, the gap between the movable filter screen 4 and the fixed filter screen 5 is large, and oil smoke absorption is preferential. Vice versa, see fig. 30-32.

Referring to fig. 19 to 21, if the right side is a large oil smoke cooking situation scene relative to the left side, the driving wheel 73 drives the first rack 79 to move leftward, and the first pressing rod 77 on the left side presses the second pressing rod 78 on the left side, so that the first auxiliary smoke guide plate 62' overcomes the elastic force of the second elastic member 83 to inwardly fold and turn over by 30 to 70 degrees, so that the right side is a main air inlet channel, the left side is an auxiliary air inlet channel, and at this time, the gap between the movable filter screen 4 and the fixed filter screen 5 is large, and oil smoke absorption is preferential. Vice versa, see fig. 27-29.

Referring to fig. 22 to 24, under the condition that cooking states of the left side and the right side are almost the same, and when the cooking states are large oil smoke, the driving wheel 73 drives the movable filter screen 4 to move to a larger gap with the fixed filter screen 5, at this moment, the oil smoke is preferentially absorbed, the oil smoke is fully exhausted, the index of clean suction is improved, and the two auxiliary smoke guide plates are both in the open position, so that the consistency of the channels on the two sides is ensured, and the negative pressure is expanded more than that of a common range hood.

Referring to fig. 25 and 26, under the condition that cooking states of the left side and the right side are almost the same and small oil smoke exists, the driving wheel 73 drives the movable filter screen 4 to move to a smaller gap between the movable filter screen and the fixed filter screen 5, oil filtering is performed preferentially, oil filtering is performed fully, the oil separation degree index is improved, the two auxiliary smoke guide plates are both in the closed position, the two side channels are ensured to be consistent, and negative pressure is expanded more compared with that of a common range hood.

Claims

1. A range hood comprises a fume collecting hood (1), a fan frame (2) arranged above the fume collecting hood (1) and a fan system (3) arranged in the fan frame (2), wherein a main air inlet (11) is formed in the fume collecting hood (1), a fixed filter screen (5) is arranged at the main air inlet (11), a fume guide plate assembly is arranged below the fixed filter screen (5), and the fume guide plate assembly comprises a main fume guide plate (61); the method is characterized in that:

a movable filter screen (4) is arranged below the fan system (3) in the fan frame (2), and the smoke guide plate component also comprises a first auxiliary smoke guide plate (62; 62 ') and a second auxiliary smoke guide plate (63; 63') which are arranged at intervals left and right;

the range hood also comprises a movement mechanism for driving the movable filter screen (4), the first auxiliary smoke guide plate (62; 62 ') and the second auxiliary smoke guide plate (63; 63'), wherein the movement mechanism comprises a first sliding rod (71) and a second sliding rod (72), the first sliding rod (71) moves left and right in the fan frame (2), the second sliding rod (72) is in sliding fit with the first sliding rod (71) and can move up and down relative to the first sliding rod (71) and move left and right synchronously with the first sliding rod (71), and the second sliding rod (72) is fixed with the movable filter screen (4), so that the movable filter screen (4) performs combined movement of moving up and down and moving left and right, and the distance between the movable filter screen (4) and the fixed filter screen (5) is changed;

the first auxiliary smoke guide plate (62; 62 ') and the second auxiliary smoke guide plate (63; 63') can move up and down or turn over, so that the air inlet channels on the main smoke guide plate or on the left side and the right side of the main smoke guide plate can be opened and closed.

2. The range hood of claim 1, wherein: the movement mechanism further comprises a driving mechanism (76), a driving wheel (73) and a connecting rod (74), wherein the driving wheel (73) is driven by the driving mechanism (76) to rotate around a front-back extending axis, a disc-shaped cam groove (731) is formed in the disc surface of the driving wheel (73), the connecting rod (74) is in sliding fit with the disc-shaped cam groove (731), and the connecting rod (74) is further in sliding fit with the second sliding rod (72) and can move left and right relative to the second sliding rod (72).

3. The range hood of claim 2, wherein: the second sliding rod (72) is provided with a first sliding groove (721) extending up and down and a second sliding groove (722) extending left and right, the first sliding rod (71) is in sliding fit with the first sliding groove (721), and the connecting rod (74) is in sliding fit with the second sliding groove (722).

4. A range hood according to claim 2 or 3, wherein: the fan frame is characterized in that a fixing plate (75) is further arranged on the inner side of the fan frame (2), the driving wheel (73) is rotatably supported on the fixing plate (75), and the first sliding rod (71) is in sliding fit with the fixing plate (75).

5. The range hood of claim 4, wherein: the first sliding rod (71) comprises a transverse sliding rod (711) extending left and right and a longitudinal sliding rod (712) extending up and down, the transverse sliding rod (711) is in sliding fit with the fixing plate (75), and the longitudinal sliding rod (712) is in sliding fit with the second sliding rod (72).

6. The range hood of claim 2, wherein: the main smoke guide plate (61) is provided with a first auxiliary air inlet (611) and a second auxiliary air inlet (612), the first auxiliary air inlet (611) is arranged on the left side of the second auxiliary air inlet (612) at intervals, the first auxiliary air inlet (611) and the second auxiliary air inlet (612) form an air inlet channel on the main smoke guide plate (61), the first auxiliary smoke guide plate (62) corresponds to the first auxiliary air inlet (611) so that the first auxiliary air inlet (611) can be opened and closed through lifting movement, and the second auxiliary smoke guide plate (63) corresponds to the second auxiliary air inlet (612) so that the second auxiliary air inlet (612) can be opened and closed through lifting movement.

7. The range hood of claim 6, wherein: the driving wheel (73) is a gear, the moving mechanism further comprises a first pressure lever (77), a second pressure lever (78), a first rack (79) and a transmission rod (80), the first rack (79) and the driving wheel (73) are meshed and can move left and right, the transmission rod (80) is provided with two parts which are arranged at intervals left and right, the first rack (79) can push one transmission rod (80) to move away from the other transmission rod (80), the first pressure lever (77) is provided with two parts, each first pressure lever (77) is fixed and linked with the transmission rod (80) at a corresponding position, the second pressure lever (78) is provided with two parts which are respectively arranged at the left side and the right side in the fan frame (2), the second pressure lever (78) extends longitudinally and extends downwards to the lower part of the main air inlet (11), and each second pressure lever (78) corresponds to one auxiliary smoke guide plate, when the first pressure lever (77) moves towards a direction far away from the other first pressure lever (77), the second pressure lever (78) can be pushed to move downwards, so that the corresponding auxiliary smoke guide plates are driven to move downwards to open the corresponding auxiliary air inlets, and each auxiliary smoke guide plate keeps the trend of moving upwards to close the corresponding auxiliary air inlets.

8. The range hood of claim 7, wherein: each auxiliary smoke guide plate is connected with the position, located at the periphery of the corresponding auxiliary air inlet, of the main smoke guide plate (61) through a connecting column (64), the auxiliary smoke guide plates are in sliding connection with the connecting column (64), and a first elastic piece (65) is arranged on the connecting column (64) so that each auxiliary smoke guide plate keeps the trend of moving upwards to close the corresponding auxiliary air inlet.

9. The range hood of claim 8, wherein: first elastic component (65) cover is established in the periphery of spliced pole (64), the lower tip of spliced pole (64) forms spliced pole head (641), the both ends of first elastic component (65) respectively with spliced pole head (641) and the lower surface butt of corresponding supplementary cigarette board of leading.

10. The range hood of claim 7, wherein: the first pressure lever (77) is bent, one part of the first pressure lever (77) extends along the left-right direction, the other part of the first pressure lever extends along the front-back direction after being bent, the bottom surface of the part of the first pressure lever (77) extending in the front-back direction is inclined and gradually inclines upwards from one side close to one side far away from the other side, and the upper end of the second pressure lever (78) can be matched with the part of the first pressure lever (77) extending in the front-back direction at the corresponding position, so that the first pressure lever (77) can push the second pressure lever (78) to move downwards.

11. The range hood of claim 2, wherein: the first auxiliary smoke guide plate (62 ') is rotatably connected to the left side of the main smoke guide plate (61), the second auxiliary smoke guide plate (63') is rotatably connected to the right side of the main smoke guide plate (61), and the first auxiliary smoke guide plate (62 ') and the second auxiliary smoke guide plate (63') can rotate around axes extending forwards and backwards.

12. The range hood of claim 11, wherein: the driving wheel (73) is a gear, the movement mechanism further comprises a first pressure lever (77), a second pressure lever (78), a first rack (79), two transmission rods (80) and a pushing block (84), the first rack (79) and the driving wheel (73) are meshed and can move left and right, the transmission rods (80) are arranged at intervals left and right, the first rack (79) can push one of the transmission rods (80) to move away from the other transmission rod (80), the first pressure lever (77) comprises two, each first pressure lever (77) is fixed and linked with the transmission rod (80) at a corresponding position, the second pressure levers (78) comprise two left and right sides which are respectively arranged in the fan frame (2), the second pressure levers (78) extend longitudinally and extend downwards below the main air inlet (11), and each second pressure lever (78) corresponds to one pushing block (84), the pushing blocks (84) are arranged on the main smoke guide plate (61), when the first pressure lever (77) moves towards the direction far away from the other first pressure lever (77), the second pressure lever (78) can be pushed to move downwards, and when the second pressure lever (78) moves downwards, the pushing blocks (84) can be pushed to move towards the direction far away from the other pushing block (84), so that the corresponding auxiliary smoke guide plates are driven to rotate, and each auxiliary smoke guide plate keeps opening and is in a flattening trend.

13. The range hood of claim 12, wherein: the first pressure lever (77) is bent, one part of the first pressure lever (77) extends along the left-right direction, the other part of the first pressure lever extends along the front-back direction after being bent, the bottom surface of the part of the first pressure lever (77) extending in the front-back direction is inclined and gradually inclines upwards from one side close to one side far away from the other side, and the upper end of the second pressure lever (78) can be matched with the part of the first pressure lever (77) extending in the front-back direction at the corresponding position, so that the first pressure lever (77) can push the second pressure lever (78) to move downwards.

14. The range hood of claim 12, wherein: the lower end face of the second pressure lever (78) gradually inclines upwards from one end close to each other to one end far away from each other, and the upper end face of the pushing block (84) gradually inclines upwards from one end close to each other to one end far away from each other, so that the second pressure lever (78) can push the pushing block (84) to move.

15. The range hood of claim 12, wherein: the movement mechanism further comprises a rack (81) arranged on the upper surface of the main cigarette guiding plate (61), a transmission gear (82) meshed with the rack (81) and a transmission shaft (86) rotatably connected with the main cigarette guiding plate (61), the transmission shaft (86) can rotate around an axis extending back and forth, the rack (81) extends in the left-right direction, each auxiliary cigarette guiding plate corresponds to one rack (81) and the transmission shaft (86), the pushing blocks (84) are arranged at the end parts of the racks (81) close to each other, the pushing blocks (84) and the racks (81) move synchronously, and the transmission gear (82) is wound on the transmission shaft (86) and can rotate synchronously; each auxiliary smoke guide plate is fixedly connected with a transmission shaft (86) on the corresponding side and can synchronously rotate.

16. The range hood of claim 12, wherein: the movement mechanism further comprises a support (87) and a second elastic member (83), the support (87) is provided with two supports and is arranged between the two pushing blocks (84), each support (87) corresponds to one pushing block (84), the second elastic member (83) is connected between each support (87) and the corresponding pushing block (84), and the second elastic member (83) applies force to the pushing blocks (84) to keep the pushing blocks (84) in a trend of moving towards the supports (87), so that the corresponding auxiliary smoke guide plates are kept in a flattening trend.