CN111536562B

CN111536562B - Fume exhaust fan

Info

Publication number: CN111536562B
Application number: CN202010397762.5A
Authority: CN
Inventors: 邹志锋; 申志贤; 徐鑫; 张上国; 王磊
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2020-05-12
Filing date: 2020-05-12
Publication date: 2022-08-12
Anticipated expiration: 2040-05-12
Also published as: CN111536562A

Abstract

The invention discloses a range hood, which comprises a movable component, a fixed component and a movement mechanism for manually driving the movable component to lift relative to the fixed component, wherein the movable component comprises a smoke collecting hood, the fixed component comprises a fan frame, and the range hood is characterized in that: the movable component further comprises a moving frame arranged above the smoke collecting cover, an air inlet is formed in the smoke collecting cover, the lower end of the moving frame is connected to the periphery of the air inlet, and the moving frame is wrapped on the periphery of the fan frame. Compared with the prior art, the invention has the advantages that: the movable frame of the movable component is coated on the periphery of the fan frame of the fixed component, so that the requirements of an oil way and sealing can be met, and grease collection can be realized and oil dripping can be avoided when the range hood is closed only by arranging one oil collecting component; through setting up the supporting component, can avoid movable part and wall body friction and damage in the in-process of elevating movement, reduce the movement resistance to increase of service life.

Description

Fume exhaust fan

Technical Field

The invention relates to an oil fume purification device, in particular to 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, and is accelerated by the fan, collected by the volute and guided to be discharged outdoors.

Currently, the range hood available on the market includes a top suction type and a side suction type. The top-suction type range hood adopts an oil smoke rising principle, generates a negative pressure area right above a cooking bench, and sucks and exhausts naturally rising oil smoke generated during cooking. The side-suction type range hood has the advantages that the side-suction type range hood is thin in body and not easy to touch the head when in operation, and has a good range hood effect because the installation height is low and the negative pressure area is close to a smoke source in a cooking state with small oil smoke amount.

The top suction type and the side suction type both have the defect of larger overall size, can not be completely wrapped by the cabinet when the cabinet normally works, and have poor hiding effect and aesthetic property.

In order to reduce the negative pressure area or the air inlet, thereby improving the oil smoke absorption effect and meeting the hiding effect and the aesthetic property, a common scheme is to set the structure into a lifting type. The lifting structure and the oil way solving method mainly comprise the following three modes:

1. the diversion component (rectifying plate, smoke guide plate, etc.) goes up and down: the extractor hood disclosed in chinese patent application No. 201811419513.0 includes: the range hood body is provided with an air suction port; the smoke guide plates are provided with at least two smoke guide plates and are combined to cover the air suction ports; and the lifting mechanism is arranged between the smoke guide plate and the range hood body and drives the smoke guide plate to move between the exhaust inlet and the cooking bench. This kind of structure is limited to the promotion effect of inhaling the oil smoke effect, forms certain oil storage space through the hem of smoke deflector self moreover usually, when fluid is more, can have the risk of spilling over.

2. Lifting the whole machine: the combination of the electric lifter and the movable hanger of the range hood disclosed in the Chinese patent with the application number of 200920127994.8 comprises a motor, a gearbox and the movable hanger which are connected in sequence, wherein the motor and the gearbox are connected with a gearbox steel wire rope, and the hanger and the range hood are hung at the lower end. The whole machine with the structure completely descends, the influence on the oil path is avoided, the oil path is similar to a fixed form and is collected by the oil collecting cup at the bottom, but the lifting mode further compresses the operation space of a user, meanwhile, the distance between the fan and the user is reduced after the oil path descends, the noise is further increased, and the user experience is reduced.

3. The smoke collecting cavity is lifted: the top-suction and side-suction liftable range hood disclosed in the chinese patent with application number 201310129629.1 comprises a housing and a fan, wherein a vertical partition plate with a through hole is installed at the lower part of a rear upper horizontal partition plate in the housing to divide the housing into a front part and a rear part, a front oil fume suction hood is installed on a lower port of the front part of the housing, and a front oil fume suction hood is installed on a through hole of a front concave plate of a telescopic housing; the lower smoke exhaust cover is arranged on the lower port of the flue, and a lifting device is arranged between the shell and the telescopic shell. This kind of structure is because the fan system mutual independence in collection petticoat pipe and the wind cabinet, and the fluid that the fan system was thrown away can not pass through telescopic shell and drip, consequently often needs the design of two oil cups just can satisfy the demand of album oil, nevertheless sets up the exquisite degree that two oil cups not only can reduce the complete machine, still greatly increased the clear degree of difficulty of user.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a range hood aiming at the defects of the prior art, which can ensure the oil smoke suction effect in a lifting mode and simultaneously can avoid oil dripping in a closed state by only using a single oil collecting device.

The technical scheme adopted by the invention for solving the technical problems is as follows: a range hood comprises a movable component, a fixed component and a movement mechanism for manually driving the movable component to ascend and descend relative to the fixed component, wherein the movable component comprises a smoke collecting hood, the fixed component comprises a fan frame, and the range hood is characterized in that: the movable component further comprises a moving frame arranged above the smoke collecting cover, an air inlet is formed in the smoke collecting cover, the lower end of the moving frame is connected to the periphery of the air inlet, and the moving frame is wrapped on the periphery of the fan frame.

In order to avoid the damage of the friction between the moving frame and the wall body in the lifting process, the wind power generator further comprises a supporting component arranged on the rear sides of the fan frame and the moving frame, the supporting component comprises a sliding rail and a sliding part, the sliding rail is fixedly connected with the rear side of the fan frame and extends downwards to cross the moving frame, and the sliding part is arranged on the rear side of the moving frame and is matched with the sliding rail in a sliding or rolling mode.

In order to enable the sliding rail to vertically extend at the rear side of the moving frame and be matched with the sliding piece, the sliding rail is provided with an oblique line section and a straight line section, the oblique line section gradually inclines backwards from top to bottom, the straight line section extends up and down, the upper end of the oblique line section is fixedly connected with the fan frame, the lower end of the oblique line section is connected with the upper end of the straight line section, and the oblique line section corresponds to the fan frame.

According to one aspect of the invention, the sliding rail is matched with the sliding part in a rolling manner, the supporting rib is arranged on the forward side of the sliding rail, the sliding part comprises a fixed support and a roller arranged in the fixed support, the fixed support is fixedly connected with the rear side of the moving frame, the roller is rotatably arranged in the fixed support, the rotating shaft of the roller extends in the left-right direction, and the supporting rib is matched with the middle concave part of the roller, so that the sliding rail is matched with the sliding part in a rolling manner.

According to another aspect of the invention, the sliding rail is in sliding fit with the sliding piece, the sliding rail is provided with a longitudinally extending guide groove, and the sliding piece is a sliding block which can be partially embedded into the guide groove and is in sliding fit with the sliding rail.

Further, for the convenience of manual operation and the capability of staying at any position, the movement mechanism comprises a balancing device and a transmission mechanism for connecting the output end of the balancing device with the movable component, and the balancing device can be balanced with the gravity of the movable component to realize stepless lifting adjustment of the movable component.

According to one aspect of the invention, the balancing device is a pneumatic spring, the upper end of the shell of the pneumatic spring is fixedly connected with the fan frame, the transmission mechanism comprises a sliding block and a telescopic rod arranged on the pneumatic spring, and the sliding block is fixedly connected with the moving frame.

According to another aspect of the invention, the transmission mechanism comprises a first connecting rod connected with the balancing device, a second connecting rod arranged to intersect with the first connecting rod, a first sliding groove arranged at the rear side of the fan frame, and a second sliding groove arranged at the rear side of the moving frame, wherein the first sliding groove and the second sliding groove both extend in the left-right direction and are parallel to each other, the first connecting rod and the second connecting rod are connected at the intersection by a first fixing pin, the first fixing pin is fixed with the first connecting rod and is rotatably connected with the second connecting rod, the upper end of the first connecting rod is rotatably connected with the fan frame by a second fixing pin, the first fixing pin and the second fixing pin both extend in the front-rear direction, the upper end of the second connecting rod is slidably arranged in the first sliding groove, and the lower ends of the first connecting rod and the second connecting rod are slidably arranged in the second sliding groove.

In order to keep balance and carry out stepless adjustment, the balance device is a damper consisting of coil springs, the transmission mechanism further comprises a gear and a rack, the gear is rotatably arranged on a central shaft of the balance device, the rack is meshed with the gear, a rotating shaft of the gear extends forwards and backwards, one side of the rack, which is meshed with the gear, is arc-shaped, and the rack is fixedly connected with the first connecting rod.

In order to avoid the movable part from accidentally falling, the fan frame further comprises a self-locking part capable of locking the movable part and the fixed part, the self-locking part comprises a ratchet strip fixedly arranged on the fan frame and a shifting piece arranged on the moving frame, a first hook part bent towards the ratchet strip is arranged on the shifting piece, the first hook part keeps the tendency of locking by inserting between ratchets on the ratchet strip, and the first hook part and the ratchets are in one-way locking, so that the shifting piece can only ascend relative to the ratchet strip during locking.

Preferably, in order to enable the shifting piece to be locked with the ratchet bar, a protective shell is arranged outside the shifting piece, the protective shell is fixedly connected with the fan frame, a first pressure spring is arranged in the protective shell and between the shifting pieces, the first pressure spring is located on one side, away from the ratchet bar, of the shifting piece, and two ends of the first pressure spring are respectively abutted against the protective shell and the shifting piece, so that the first hook portion of the shifting piece is enabled to keep a trend of being locked with the ratchet bar.

In order to facilitate unlocking of the shifting piece and the ratchet bar, the shifting piece is rotatably connected with the moving frame through a pin, the shifting piece is positioned on the front side of the ratchet bar, the self-locking component further comprises a pressing component capable of pushing the shifting piece to rotate so as to unlock the ratchet bar, and the parts of the pressing component and the first pressure spring, which respectively act on the shifting piece, are respectively positioned on two sides of the pin.

In order to facilitate the rotation of the pushing plectrum, the pressing component comprises a limiting rod, a button, a fixed shell and a second pressure spring, the limiting rod extends forwards and backwards in the smoke collecting hood, the button is arranged at the front end of the limiting rod and protrudes out of the front side of the smoke collecting hood, the fixed shell is fixedly arranged inside the front side of the smoke collecting hood, the limiting rod penetrates through the fixed shell and can move forwards and backwards relative to the fixed shell, the rear end of the limiting rod is abutted against the plectrum, a flange is arranged on the periphery of the limiting rod, and the second pressure spring is arranged between the flange and the inner side of the rear end of the fixed shell so that the limiting rod keeps the trend of moving forwards.

In order to enable the button to be kept at the current position in an unlocking state so as to free a hand to manually operate the movable component, the pressing assembly further comprises a lock hook and a lock block, the lock hook is rotatably connected with the limiting rod, a bent second hook portion is arranged at the rear end of the lock hook, a limiting groove which is recessed towards the direction far away from the lock hook is formed in the fixed shell, the lock block is arranged in the limiting groove, a locking groove which is recessed towards the front side is formed at the rear end of the lock block, and the second hook portion of the lock hook can move around the periphery of the lock block in the limiting groove and can be locked with the locking groove.

In order to guide the lifting of the movable component, the moving mechanism further comprises a guide mechanism, the guide mechanism comprises a first guide rail and a second guide rail which are in sliding fit, the first guide rail comprises two guide rails which respectively extend up and down on the left side and the right side of the fan frame, and the second guide rail is fixedly connected with the moving frame.

Compared with the prior art, the invention has the advantages that: the movable frame of the movable component is wrapped on the periphery of the fan frame of the fixed component, so that the requirements of an oil way and sealing can be met, and grease collection can be realized and oil dripping can be avoided when the range hood is closed only by arranging an oil collecting component; by arranging the supporting component, the movable component can be prevented from being damaged due to friction with a wall body in the lifting movement process, the movement resistance is reduced, and the service life is prolonged; by arranging the balance device, the movable part can stay at any position, and stepless adjustment is realized; through setting up self-lock device, can avoid movable part accident to drop, increase of service life avoids producing the potential safety hazard.

Drawings

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

fig. 2 is a schematic back view (second position) of the range hood according to the first embodiment of the present invention;

fig. 3 is a schematic back view (second position) of the hidden fan housing of the range hood according to the first embodiment of the present invention;

fig. 4 is a cross-sectional view (second position) of the range hood of the first embodiment of the present invention;

FIG. 5 is an enlarged view of a portion I of FIG. 4;

FIG. 6 is an enlarged view of portion II of FIG. 4;

fig. 7 is a schematic view of the movable components of the range hood in the first embodiment of the present invention (hiding the fan housing and the oil cup);

fig. 8 is a partial schematic view of a fixed component and a moving mechanism of the range hood according to the first embodiment of the present invention;

fig. 9 is a schematic view of a support member of the range hood in accordance with the first embodiment of the present invention;

FIG. 10 is a partial view of the ratchet assembly of the self-locking component of the first embodiment of the range hood of the present invention;

fig. 11 is a schematic view of a pressing assembly of the self-locking member of the range hood according to the first embodiment of the present invention;

FIG. 12 is a schematic view of a stop of the pressing assembly of FIG. 11;

FIG. 13 is a cross-sectional view (unlocked state) of the hidden check rod of the pressing assembly of FIG. 11;

FIG. 14 is a cross-sectional view of the hidden restraint rod of the pressing assembly of FIG. 11 (self-locking state);

fig. 15 is a schematic back view (first position) of a hidden fan housing of a range hood in accordance with a first embodiment of the present invention;

fig. 16 is a cross-sectional view (first position) of the range hood of the first embodiment of the present invention;

figure 17 is an alternative embodiment of the support member of the range hood of the present invention;

fig. 18 is a rear view (second position) of the range hood in accordance with the second embodiment of the present invention;

fig. 19 is a schematic back view (first position) of a range hood according to a second embodiment of the present invention.

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 "central," "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 the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and to simplify the description, but are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and that the directional terms are used for purposes of illustration and are not to be construed as limiting, for example, because the disclosed embodiments of the present invention may be oriented in different directions, "lower" is not necessarily limited to a direction 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.

Referring to fig. 1 to 4, a range hood comprises a movable component 1 and a fixed component 2, wherein the movable component 1 comprises a smoke collecting hood 11, a fan housing 12 arranged above the smoke collecting hood 11 and an oil cup 13 arranged at the bottom of the rear side of the smoke collecting hood 11. The movable member 2 includes a fan frame 21 disposed above the smoke collecting hood 11 and a fan system (not shown) disposed in the fan frame 21. The cross section of the fan housing 12 is in a U shape with an opening facing backward and is wrapped outside the fan frame 21. The fan frame 21 is fixed with the wall, and the movable part 1 can do lifting movement relative to the fixed part 2, thus forming the lifting top-suction type range hood.

The movable component 1 further comprises a moving frame 14 arranged above the smoke collecting hood 11 and on the inner side of the fan housing 12, and the moving frame 14 is a hollow cuboid with openings at the upper end and the lower end. An air inlet 111 is formed on the fume collecting hood 11, and a filter screen 112 can be arranged at the air inlet 111. The lower end of the moving frame 14 is connected to the periphery of the intake opening 111. The moving frame 14 is covered outside the blower housing 21, moves in a space between the inside of the blower housing 12 and the outside of the blower housing 21, and when the movable member 1 is lowered to the lowest position, the upper end of the moving frame 14 is not lower than the lower end of the blower housing 21.

Alternatively, the fan housing 12 may also be connected and fixed with the fan frame 2 to form the fixing part 2.

Example one

Referring to fig. 3, 4, 7 and 8, the range hood further includes a moving mechanism for driving the movable component 1 to ascend and descend relative to the fixed component 2, which is a manual moving mechanism and includes a balancing device 31, a transmission mechanism 32 and a guide mechanism 33. Among them, the balancing means 31 is preferably a pneumatic spring, provided at the rear side of the blower frame 21, extending in the longitudinal direction. The upper end of the shell of the pneumatic spring is connected and fixed with the fan frame 21, and the telescopic rod 311 of the pneumatic spring can retract upwards or extend downwards. The transmission mechanism 32 includes a sliding block 322, which is disposed on the telescopic rod 311 of the pneumatic spring, preferably on the end of the telescopic rod 311, and the sliding block 322 is further connected and fixed with the moving frame 14. When a user pushes the movable component 1, such as the smoke collecting hood 11, downwards (upwards) by hand, the telescopic rod 311 of the pneumatic spring extends downwards (retracts upwards), and can stay at the current position after releasing the hand, so that the balance between the elastic force of the pneumatic spring and the gravity of the movable component 1 is maintained, the movable frame 14 can be driven to lift, and the whole movable component 1 can be lifted.

The guide mechanism 33 is slidably engaged with the first guide rail 331 and the second guide rail 332, wherein the first guide rail 331 has two rails respectively extending up and down on the left and right sides of the fan frame 21, and the left and right sides of the moving frame 14 are respectively provided with an upwardly extending mounting bracket 141 for connecting and fixing with the second guide rail 332. The guide mechanism 33 guides the up-and-down movement of the movable member 1 so that it can only move up and down in the up-and-down direction.

Since the movable part 1 is covered outside the fixed part 2 for lifting movement in the present invention, the condensed oil on the inner side wall of the blower frame 21 can flow down along the moving frame 14 into the smoke collecting hood 11 and finally be collected by the oil cup 13. In addition, the movable member 1 may be damaged by friction with the wall during the lifting process. Therefore, the range hood further comprises a support part 4 arranged at the rear side of the fan frame 21 and the moving frame 14. Each support member 4 includes a slide rail 41 and a slider 42, the slide rail 41 being fixedly connected to the rear side of the wind turbine frame 21 and extending downwardly across the moving bezel 14. The slide rail 41 has a diagonal section 411 and a straight section 412, wherein the diagonal section 411 gradually inclines backwards from top to bottom, the upper end of the diagonal section 411 is fixedly connected with the wind frame 21, the lower end of the diagonal section 411 is connected with the upper end of the straight section 412, the straight section 412 extends up and down, the diagonal section 411 and the straight section 412 form an integrated slide rail 41, and the diagonal section 411 corresponds to the wind frame 21. This is because the fan frame 21 is located inside the moving frame 14, and therefore, the diagonal member 411 is required to adjust the position of the entire slide rail 41 so as to extend up and down on the rear side of the moving frame 14.

Referring to fig. 9, the sliding rail 41 of the supporting member 4 is provided with a longitudinally extending guide groove 414, and the sliding member 42 is a slider capable of being partially inserted into the guide groove 414 to be slidably engaged with the sliding rail 41.

Referring to fig. 17, the slide rail 41 further includes a support rib 413 disposed on a front side of the straight section 412, and the slider 42 includes a fixed bracket 421 and a roller 422 disposed in the fixed bracket 421. The fixed bracket 421 is fixedly connected to the rear side of the moving frame 14, the roller 422 is rotatably disposed in the fixed bracket 421, and the rotation axis of the roller 422 extends in the left-right direction. The support rib 413 is engaged with the middle recess of the roller 422, so that the slide rail 41 and the slider 42 are rollingly engaged to reduce friction.

Alternatively, the supporting component 4 may also be one or more of a sliding rail and a ball, a gear and a rack, a fixed pulley, a movable pulley, a screw rod, a pneumatic spring, a hydraulic spring, and the like, and the supporting structure 4 may support, stabilize and protect the exhaust fume collecting hood 11 from wall surface abrasion during the descending process of the exhaust fume collecting hood 11.

To avoid accidental dropping after adjusting the height of the movable part 1, the movement mechanism is also provided with a self-locking part in this embodiment. Referring to fig. 1, 4-6, 10-14, the self-locking part includes a ratchet assembly 34 and a pressing assembly 35. The ratchet assembly 34 includes a ratchet strip 341, a pick 342, a protective shell 343 and a first pressure spring 344, wherein the ratchet strip 341 extends in a longitudinal direction, preferably vertically, and is fixed to the left or right side of the wind turbine frame 21, the pick 342 extends in the longitudinal direction, and is disposed on the left or right side of the moving frame 14 of the movable component 1 on the same side as the ratchet strip 341, and the protective shell 343 is disposed outside the pick 342. The paddle 342 is rotatably connected to the moving frame 14 by a pin 345, and the pin 345 extends in the left-right direction, whereby the paddle 342 is rotatable about the pin 345. Preferably, the paddle 342 is connected to the moving frame 14 near the lower portion. The upper end of the pick 342 has a first hook 3421 bent toward the ratchet 341 and capable of locking with the ratchet teeth 3411 of the ratchet 341 (longitudinally spaced apart on the front or rear side of the ratchet 341), the upper surface of each ratchet tooth 3411 is a flat surface, the lower surface is a slope extending gradually obliquely upward from inside to outside, and the upper surface of the first hook 3421 is fitted with the lower surface of the ratchet tooth 3411. When the first hook 3421 is thus locked with the ratchet 3411, the first hook 3421 can move upward only in one direction, thereby preventing the movable part 1 from falling. In order to keep the pick 342 locked with the ratchet 341, the protective housing 343 is fixedly connected to the fan frame 21, the first pressure spring 344 is disposed between the protective housing 343 and a position where the pick 342 is located above the pin 345, the first pressure spring 344 is located on a side of the pick 342 away from the ratchet 341, both ends of the first pressure spring 344 abut against the protective housing 343 and the pick 342, respectively, and the force applied to the pick 342 pushes the pick 342 in the direction of the ratchet 341 to keep the ratchet 341 locked. In this embodiment, the pick 342 is located on the front side of the ratchet 341, thereby facilitating application of a rearward pushing force to the pick 342 to unlock it from the ratchet 341.

To facilitate the operation of the pick 342, which can be unlocked by disengaging the ratchet 341, a pressing assembly 35 is provided which can push the pick 342 to rotate about the pin 345. The pressing assembly 35 includes a stopper 351, a button 352, a fixing case 353, a second compression spring 354, a locking hook 355, and a locking block 356. The stopper rod 351 extends forward and backward within the hood 11, and the button 352 is provided at the front end of the stopper rod 351 and protrudes to the front side of the hood 11 so as to be pressed. The fixed shell 353 is fixedly arranged inside the front side of the smoke collecting cover 11, and the limiting rod 351 penetrates through the fixed shell 353. The rear end of the limiting rod 351 is abutted with the lower end of the shifting piece 342, and the abutted position is located below the pin 345, namely the first pressure spring 344 and the limiting rod 351 act on two sides of the pin 345 respectively. The outer circumference of the stopper rod 351 is provided with a flange 3511, and the second compression spring 344 is provided between the flange 3511 and the inside of the rear end of the fixed case 343, so that the stopper rod 351 maintains a tendency to move forward. The limiting rod 351 is formed with a receiving groove 3512, and the receiving groove 3512 penetrates through one side of the limiting rod 351, in this embodiment, the bottom of the limiting rod 351. The locking hook 355 is disposed in the receiving groove 3512, and a front end thereof is rotatably connected to the limiting rod 351 and a rotating shaft thereof extends in an up-down direction. The rear end of the latch hook 355 has a bent second hook 3551. A position opposite to the opening of the accommodating groove 3512 in the fixed shell 343 is provided with a limiting groove 3431 which is concave towards the direction far away from the lock hook 355, and the lock block 356 is arranged in the limiting groove 3431. The locking piece 356 is V-shaped, and the limiting groove 3431 forms an adaptive V-shape at the periphery of the locking piece 356. The V-shaped tip of the lock block 356 is forward, and a locking groove 3561 recessed forward is formed at the rear end thereof, and is capable of being fitted into and locked by the second hook 3551 of the lock hook 355.

The seal length L of the protective case 343 on the outer periphery of the paddle 342 > the total stroke of the lifting of the movable member 1 to keep the ratchet 341 and the paddle 342 out of the oil path.

When the movable member 1 needs to be lowered, the button 352 is pressed backward, the stopper rod 351 is pushed backward, the second hook portion 3551 of the lock hook 355 moves along the outside of one oblique side of the lock block 356 (one oblique side of the V-shaped groove in the stopper groove 3431), so that the dial 342 is pushed to rotate around the pin 345, wherein the portion above the pin 345 rotates forward and the portion below the pin 345 rotates backward, the first hook portion 3421 of the dial 342 is separated from the ratchet 341, when the lock hook 355 is pushed to the rear end of the lock block 356, the button 352 is released, the second hook portion 355 of the lock hook 355 slides into the locking groove 3561, so that the stopper rod 351 and the fixed housing 353 are locked, the stopper rod 351 is prevented from moving forward under the action of the second pressure spring 354, see fig. 13, so that the dial 342 is kept separated from the ratchet 341, and the self-locking member is kept in the unlocked state; thereafter, when a force is applied to the movable member 1, such as the smoke collecting hood 11, the movable member 1 can be slowly lowered by the balance device 31 and the guide mechanism 33, and then lowered to a state required by the user, the button 352 is pressed backward once, the second hook portion 3551 of the lock hook 355 is disengaged from the locking groove 3561 of the lock block 356, after the button 352 is released, the stopper rod 351 moves forward by the second pressure spring 354, the lock hook 355 moves along the other oblique edge of the lock block 356 and returns to the initial position located at the front side of the lock block 356, see fig. 14, at which time the lock hook 355 no longer locks the stopper rod 351, the stopper rod 351 no longer applies a force to the dial 342, the dial 342 rotates around the pin 345 by the first pressure spring 351, wherein the portion located above the pin 345 rotates backward, the portion located below the pin 345 rotates backward, and the first hook portion 3421 of the dial 342 is locked with the ratchet 341, the self-locking mechanism is in a self-locking state, and the movable part 1 can be prevented from falling.

When the movable component 1 needs to be lifted, the first hook 3521 of the pick 342 is corresponding to the inclined surface of the ratchet 3411 of the ratchet 341, so that the fume collecting hood 11 is directly pushed upwards, and the movable component can be locked at the corresponding height by releasing the hand when the movable component is stopped.

The range hood has the following three states: a) a contraction state: the movable part 1 is now in the uppermost first position, in which the hood 11, including the fume collecting hood, is completely or partially concealed within the cabinet, in which the fume extraction effect is achieved, see fig. 15 and 16; b) in the descending process, the range hood can continuously suck the oil smoke, the balance device 31 of the movement mechanism is started, so that the movable component 1 starts to descend, stepless adjustment is stopped, a user can select any position in the stroke to stop, the descending process can identify the distance between the smoke collecting hood 11 and a pot or other utensils, and automatic stop can be realized before the smoke collecting hood touches the utensils; c) maximum protruding state of the movable member 1: referring to fig. 3 and 4, the movable member 1 is lowered to the lowest second position relative to the fixed member 2, in which the distance of the smoke collecting hood 11 from the wall is L, the height of the smoke collecting hood 11 from the cooktop is H, and 0.5< L/H <1 and H ≦ 550mm are satisfied. Thereby ensuring that 1, the negative pressure area is at or below the gold smoking area; 2. the smoke collecting cavity in the smoke collecting cover 11 has a certain volume and a certain smoke collecting effect, and the negative pressure area cannot be too far back, so that smoke leakage from the front side is prevented; 3. when cooking, the range hood (fume collecting hood 11) can not shield the human body from watching the view in the pot.

Through the motion mode between the movable part 1 and the fixed part 2, the movable part 1 is covered outside the fixed part 2, and the movable part 1 is covered outside the fan frame 21 (inner wall of an oil way), so that the problems of the oil way, sealing and the like in the lifting process can be perfectly solved.

Example two

Referring to fig. 18 and 19, unlike the first embodiment, the balancing device 31 and the transmission mechanism 32 of the moving mechanism are different, in this embodiment, the balancing device 31 is a damper composed of a coil spring, and the transmission mechanism 32 includes a gear 323 rotatably disposed on a central shaft of the balancing device 31, a rack 324 engaged with the gear 323, a first link 325, a second link 326, a first slide 327 disposed at a rear side of the blower frame 21, and a second slide 328 disposed at a rear side of the moving frame 14. The first runner 327 is preferably located near an upper portion of the rear side of the blower housing 21, and the second runner 328 is preferably located near an upper portion of the rear side of the moving frame 14. The first slide groove 327 and the second slide groove 328 extend in the left-right direction and are parallel to each other, and preferably, are horizontal. The first link 325 and the second link 326 are disposed to intersect and connected at the intersection by a first fixing pin 3291, and the first fixing pin 3291 is fixed to the first link 325 and rotatably connected to the second link 326 such that the second link 326 can rotate about the first fixing pin 3291. Preferably, the first link 325 and the second link 326 cross at an intermediate position. The upper end of the first link 325 is rotatably connected to the blower housing 21 by a second fixing pin 3292, and the first link 325 can rotate about the second fixing pin 3292. The first fixing pin 3291 and the second fixing pin 3292 each extend in the front-rear direction. The upper end of the second connecting rod 326 is slidably disposed in the first sliding slot 327, and the lower ends of the first connecting rod 325 and the second connecting rod 326 are slidably disposed in the second sliding slot 328.

The rotation axis of the gear 323 extends back and forth, the rack 324 is in a sector shape, the teeth 3241 of the rack 324 are arranged on the circular arc periphery of the rack 324, the position of the rack 324 close to the center of the circle is connected with the first connecting rod 325, and the second fixing pin 3292 can be close to the center of the circle of the rack 324. Preferably, the rack 324 and the first link 325 may be integrally formed.

Referring to fig. 12, the slide rail 41 of the support member 4 is provided with a longitudinally extending guide groove 414, and the sliding member 42 is a slider capable of being partially inserted into the guide groove 414 to be slidably engaged with the slide rail 41.

When the movable member 1 is manually pressed downward (pushed upward), the first link 325 can rotate around the second fixed pin 3292, and the second link 326 can rotate around the first fixed pin 3291, because the first link 325 and the second link 326 are limited by the first sliding groove 327 and the second sliding groove 328, the first link 325 and the second link 326 can only increase the included angle between the two or reduce the included angle α between the two, and meanwhile, the rack 324 rotates around the second fixed pin 3292, so that the rack drives the gear 323 to rotate, and the balancing device 31 applies a force opposite to the pressing or pushing direction, so that the movable member 1 can stay at any position. When the angle α between both the first link 325 and the second link 326 is smallest, see fig. 18, the movable member 1 is lowered to the lowest second position, and when the angle α between both the first link 325 and the second link 326 is largest, see fig. 19, the movable member 1 is raised to the highest first position.

The specification of the invention discloses two lifting motion mechanisms, and any motion mechanism capable of driving the part to lift in other prior art can be adopted alternatively.

Claims

1. A range hood, including movable part (1), fixed part (2) and be used for manually driving movable part (1) to the kinematic mechanism that fixed part (2) goes up and down, movable part (1) includes collection petticoat pipe (11), fixed part (2) include be used for with fixed fan frame (21) of wall body installation, its characterized in that: the movable component (1) further comprises a moving frame (14) arranged above the smoke collecting hood (11), an air inlet (111) is formed in the smoke collecting hood (11), the lower end of the moving frame (14) is connected to the periphery of the air inlet (111), the moving frame (14) covers the periphery of the fan frame (21), and a supporting component (4) for preventing the moving frame (14) from being damaged by friction with a wall body in the lifting process is arranged between the fan frame (21) and the rear side of the moving frame (14);

the supporting component (4) comprises a sliding rail (41) and a sliding piece (42), the sliding rail (41) is fixedly connected with the rear side of the fan frame (21) and extends downwards to cross the moving frame (14), and the sliding piece (42) is arranged on the rear side of the moving frame (14) and is matched with the sliding rail (41) in a sliding or rolling mode.

2. The range hood of claim 1, wherein: the sliding rail (41) is provided with an oblique line segment (411) and a straight line segment (412), the oblique line segment (411) is inclined backwards gradually from top to bottom, the straight line segment (412) extends up and down, the upper end of the oblique line segment (411) is fixedly connected with the fan frame (21), the lower end of the oblique line segment (411) is connected with the upper end of the straight line segment (412), and the oblique line segment (411) corresponds to the fan frame (21).

3. The range hood of claim 1, wherein: the sliding rail (41) is provided with a supporting rib (413) towards one front side, the sliding piece (42) comprises a fixing support (421) and a roller (422) arranged in the fixing support (421), the fixing support (421) is fixedly connected with the rear side of the moving frame (14), the roller (422) is rotatably arranged in the fixing support (421), the rotating shaft of the roller (422) extends in the left-right direction, and the supporting rib (413) is matched with a middle concave part of the roller (422), so that the sliding rail (41) is in rolling fit with the sliding piece (42).

4. The range hood of claim 1, wherein: the sliding rail (41) is provided with a guide groove (414) extending longitudinally, and the sliding part (42) is a sliding block which can be partially embedded into the guide groove (414) and is in sliding fit with the sliding rail (41).

5. The range hood according to any one of claims 1 to 4, wherein: the movement mechanism comprises a balancing device (31) and a transmission mechanism (32) for connecting the output end of the balancing device (31) with the movable component (1), and the balancing device (31) can be balanced with the gravity of the movable component (1) to realize stepless lifting adjustment of the movable component (1).

6. The range hood of claim 5, wherein: the balance device (31) is a pneumatic spring, the upper end of a shell of the pneumatic spring is fixedly connected with the fan frame (21), the transmission mechanism (32) comprises a sliding block (322) and a telescopic rod (311) arranged on the pneumatic spring, and the sliding block (322) is further fixedly connected with the moving frame (14).

7. The range hood of claim 5, wherein: the transmission mechanism (32) comprises a first connecting rod (325) connected with the balancing device (31), a second connecting rod (326) arranged in a crossed mode with the first connecting rod (325), a first sliding chute (327) arranged on the rear side of the fan frame (21) and a second sliding chute (328) arranged on the rear side of the moving frame (14), wherein the first sliding chute (327) and the second sliding chute (328) extend in the left-right direction and are parallel to each other, the first connecting rod (325) and the second connecting rod (326) are connected at the crossed position through a first fixing pin (3291), the first fixing pin (3291) is fixed with the first connecting rod (325) and is rotatably connected with the second connecting rod (326), the upper end of the first connecting rod (325) is rotatably connected with the fan frame (21) through a second fixing pin (3292), and the first fixing pin (3291) and the second fixing pin (3292) extend in the front-back direction, the upper end of the second connecting rod (326) is arranged in the first sliding groove (327) in a sliding mode, and the lower ends of the first connecting rod (325) and the second connecting rod (326) are arranged in the second sliding groove (328) in a sliding mode.

8. The range hood of claim 7, wherein: the balance device (31) is a damper formed by coil springs, the transmission mechanism (32) further comprises a gear (323) rotatably arranged on a central shaft of the balance device (31) and a rack (324) meshed with the gear (323), a rotating shaft of the gear (323) extends forwards and backwards, one side of the rack (324) meshed with the gear (323) is arc-shaped, and the rack (324) is fixedly connected with the first connecting rod (325).

9. The range hood according to any one of claims 1 to 4, wherein: the wind power generator further comprises a self-locking component capable of locking the movable component (1) and the fixed component (2), the self-locking component comprises a ratchet bar (341) fixedly arranged on the wind frame (21) and a shifting sheet (342) arranged on the moving frame (14), a first hook portion (3421) bent towards the ratchet bar (341) is arranged on the shifting sheet (342), the first hook portion (3421) keeps the tendency of locking by inserting between ratchet teeth (3411) on the ratchet bar (341), and the first hook portion (3421) and the ratchet teeth (3411) are in one-way locking, so that the shifting sheet (342) can only ascend relative to the ratchet bar (341) during locking.

10. The range hood of claim 9, wherein: a protective shell (343) is arranged outside the poking piece (342), the protective shell (343) is fixedly connected with the fan frame (21), a first pressure spring (344) is arranged in the protective shell (343) and between the poking piece (342), the first pressure spring (344) is positioned on one side, away from the ratchet (341), of the poking piece (342), and two ends of the first pressure spring (344) are respectively abutted against the protective shell (343) and the poking piece (342), so that the first hook portion (3421) of the poking piece (342) keeps a locking trend with the ratchet (341).

11. The range hood of claim 10, wherein: the poking piece (342) is connected with the moving frame (14) in a rotating mode through a pin (345), the poking piece (342) is located on the front side of the ratchet bar (341), the self-locking component further comprises a pressing assembly (35) capable of pushing the poking piece (342) to rotate and unlocking with the ratchet bar (341), and the parts, acting on the poking piece (342), of the pressing assembly (35) and the first pressure spring (344) are located on two sides of the pin (345) respectively.

12. The range hood of claim 11, wherein: the pressing assembly (35) comprises a limiting rod (351), a button (352), a fixed shell (353) and a second pressure spring (354), the limiting rod (351) extends forwards and backwards in the smoke collecting hood (11), the button (352) is arranged at the front end of the limiting rod (351) and protrudes out of the front side of the smoke collecting hood (11), the fixed shell (353) is fixedly arranged inside the front side of the smoke collecting hood (11), the limiting rod (351) penetrates through the fixed shell (353) and can move forwards and backwards relative to the fixed shell (353), the rear end of the limiting rod (351) is abutted to a shifting piece (342), a flange (3511) is arranged on the periphery of the limiting rod (351), and the second pressure spring (344) is arranged between the flange (3511) and the inner side of the rear end of the fixed shell (343) to enable the limiting rod (351) to keep the trend of moving forwards.

13. The range hood of claim 12, wherein: the pressing assembly (35) further comprises a locking hook (355) and a locking block (356), the locking hook (355) is rotatably connected with the limiting rod (351), the rear end of the locking hook (355) is provided with a bent second hook portion (3551), a limiting groove (3431) which is recessed towards the direction far away from the locking hook (355) is formed in the fixing shell (343), the locking block (356) is arranged in the limiting groove (3431), a locking groove (3561) which is recessed towards the front side is formed at the rear end of the locking block (356), and the second hook portion (3551) of the locking hook (355) can move around the periphery of the locking block (356) in the limiting groove (3431) and can be locked with the locking groove (3561).

14. The range hood of claim 5, wherein: the movement mechanism further comprises a guide mechanism (33), the guide mechanism (33) comprises a first guide rail (331) and a second guide rail (332) which are in sliding fit, the first guide rail (331) is provided with two guide rails which respectively extend up and down on the left side and the right side of the fan frame (21), and the second guide rail (332) is fixedly connected with the movement frame (14).