CN110736119B

CN110736119B - Oil filter screen and range hood with same

Info

Publication number: CN110736119B
Application number: CN201911018693.6A
Authority: CN
Inventors: 刘剑涛
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2019-10-24
Filing date: 2019-10-24
Publication date: 2021-05-18
Anticipated expiration: 2039-10-24
Also published as: CN110736119A

Abstract

The invention discloses an oil filter screen which comprises a fixed oil screen, wherein the fixed oil screen comprises an oil screen body, a smoke inlet is formed in the oil screen body, the oil filter screen also comprises a dynamic oil screen, the dynamic oil screen comprises at least two main shafts arranged in parallel and elastic filter strips arranged on the main shafts, two ends of each main shaft are movably connected with the fixed oil screen, the main shafts are positioned at the downstream of the oil screen body on an oil smoke flow path, the elastic filter strips extend from the main shafts to the direction far away from the oil screen body, the elastic filter strips comprise first elastic filter strips and second elastic filter strips which are arranged on each main shaft at intervals, each elastic filter strip is arranged at intervals along the axial direction of the main shafts, the first elastic filter strips and the second elastic filter strips which are adjacent on the same main shaft extend from the main shafts to the directions far away from each other, and the first elastic filter strips on one main shaft and the second elastic filter strips on the adjacent main shafts extend from the main shafts towards each other through the main shafts, Thereby forming a staggered arrangement. Also discloses a range hood with the oil filter screen.

Description

Oil filter screen and range hood with same

Technical Field

The invention relates to an oil fume purification device, in particular to an oil filter screen and a range hood applying the oil filter screen.

Background

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.

In order to improve the oil fume filtering effect, the following two methods are commonly used at present: 1) increasing the number of layers of the oil screen: for example, a novel oil screen of a range hood disclosed in chinese patent application No. 201611243642.X comprises a smoke collecting hood, and a first oil screen and a second oil screen which are recessed inside the smoke collecting hood, wherein a lower surface of the first oil screen is attached to an upper surface of the second oil screen, a ring of annular oil groove is correspondingly installed below the smoke collecting hood, lower sides of the first oil screen and the second oil screen are inserted into the annular oil groove, and lower sides of the first oil screen and the second oil screen are clamped and fixed between two side walls of the annular oil groove, and a double-layer structure of the oil screens improves a smoke-trapping effect and an oil filtering effect; 2) adopting a rotary dynamic oil net: a dynamic oil net, as disclosed in the chinese patent with application number 201811204857.X, for a range hood, with a driving device in a fan assembly of the range hood is connected, the dynamic oil net includes a net portion, the net portion includes a plurality of spokes, at least a part of the spokes in the plurality of spokes include a bending/folding portion, the bending/folding portion is bent/folded in a direction approaching and/or keeping away from the driving device.

However, the filtering effect is generally increased by simply increasing the layer number of the oil screen, and the cleaning is troublesome and the processing is difficult; the structure of the rotary dynamic oil net is complex, and the reliability needs to be improved.

Disclosure of Invention

The first technical problem to be solved by the present invention is to provide an oil filter screen to improve the oil smoke filtering effect and accelerate the grease collection for separation, aiming at the above-mentioned deficiencies of the prior art.

The second technical problem to be solved by the invention is to provide a range hood with the oil filter screen.

The technical scheme adopted by the invention for solving the first technical problem is as follows: the utility model provides an oil strainer, includes fixed oil strainer, fixed oil strainer includes the oil strainer body, set up into smoke mouth on the oil strainer body, its characterized in that: the oil filter screen further comprises a dynamic oil screen, the dynamic oil screen comprises at least two main shafts arranged in parallel and elastic filter strips arranged on the main shafts, two ends of each main shaft are movably connected with the fixed oil screen, the main shafts are located at the downstream of the oil screen body on an oil smoke flowing path, the elastic filter strips extend from the main shafts in the direction far away from the oil screen body, each elastic filter strip comprises a first elastic filter strip and a second elastic filter strip which are arranged on each main shaft at intervals, the elastic filter strips are arranged at intervals along the axial direction of the main shafts, the adjacent first elastic filter strips and the adjacent second elastic filter strips on the same main shaft extend from the main shafts in the direction far away from each other, and the first elastic filter strip on one main shaft and the adjacent second elastic filter strips on the main shafts extend oppositely from the main shafts to form staggered arrangement.

Preferably, in order to ensure the maximum contact area between the elastic filter strip and the lampblack, the main shaft is positioned between the two smoke inlets.

In order to further enhance the adsorption and filtration of the oil smoke, the ratio of the area of the smoke inlet covered by the projection of each elastic filter strip on the oil screen body to the area of the smoke inlet uncovered by each elastic filter strip is A, and A is not less than 50%.

In order to enable the elastic filter strips to normally swing and always keep intersecting in the swinging process, the length of each elastic filter strip is not larger than the distance between two adjacent main shafts, and the end contact positions of the first elastic filter strip and the second elastic filter strip correspond to the middle position of the smoke inlet.

In order to facilitate the quick assembly and disassembly of the spindle and the elastic filter strips, the dynamic oil screen further comprises a first fixing strip and a second fixing strip which are arranged at each end of the spindle, the first fixing strip and the second fixing strip are connected with each other and fixedly connected with the fixed oil screen, the first fixing strip and the second fixing strip are arranged on the oil smoke flow path in an upstream-downstream mode, and the end portion of the spindle is located between the first fixing strip and the second fixing strip to form movable connection.

Preferably, in order to facilitate the swinging motion of the spindle relative to the fixing strips, a sector-shaped swinging space is formed between the first fixing strip and the second fixing strip, and two ends of each spindle are located in the swinging space so that the spindle can swing relative to the oil screen body.

For the convenience of quickly dismounting and mounting the dynamic oil screen, the fixed oil screen further comprises a frame arranged on the periphery of the oil screen body, a limiting structure is arranged between the end part of each pair of the first fixing strip and the second fixing strip and the corresponding frame, the limiting structure comprises a limiting clamping groove arranged on the inner side of the frame and a limiting clamp arranged at the end part of the first fixing strip and the end part of the second fixing strip, and the limiting clamp is inserted into the limiting clamping groove so as to limit the first fixing strip and the second fixing strip in the frame.

In order to facilitate the collection of oil, avoid the direct drippage of surface oil, play certain rectification simultaneously, the periphery of advancing the mouth is formed with the turn-ups that turns over to the low reaches, and on oil smoke flow path, the turn-ups of every inlet both sides are drawn close gradually by upper reaches to low reaches, and the turn-ups follows the mouth junction and is the circular arc transition shape.

The technical scheme adopted by the invention for solving the second technical problem is as follows: the utility model provides an be applied to range hood as above oil cleaner screen, includes the collection petticoat pipe, set up air intake, its characterized in that on the collection petticoat pipe: the oil filter screen is arranged at the air inlet.

In order to facilitate collection of grease collected on the oil screen, an oil groove is formed inside the oil screen body, an oil leakage port is formed in the oil groove, an oil collecting device is arranged at the bottom of the rear side of the fume collecting hood, and the oil leakage port is located above the oil collecting device.

Compared with the prior art, the invention has the advantages that: by arranging the fixed oil screen and the swinging elastic oil screen, after oil smoke is gathered, the oil smoke can be intensively guided to the dynamic oil screen for secondary filtration, the oil smoke filtration effect is improved, the separated oil collection is accelerated, and the flexible oil screen is easy to clean; the high-density elastic filter strips are contacted with the oil smoke to strengthen the adsorption and filtration of the oil smoke, and meanwhile, in the oil smoke movement process, the contact between the oil smoke and the filter structure is greatly improved due to the swinging of the independent elastic filter strips and the staggered swinging among the integral elastic filter strips, so that the oil smoke filtering effect is greatly improved; the mode of clamping the main shaft by the two fixing strips can improve the convenience of disassembly and assembly.

Drawings

FIG. 1 is a schematic view of a range hood according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a range hood in accordance with an embodiment of the present invention;

FIG. 3 is a schematic view of an oil screen according to an embodiment of the present invention;

FIG. 4 is an exploded view of an oil screen according to an embodiment of the present invention;

FIG. 5 is a top view of an oil screen of an embodiment of the present invention;

FIG. 6 is an enlarged view of a portion I of FIG. 5;

FIG. 7 is a top view of a fixed oil screen of an embodiment of the present invention;

FIG. 8 is a side view of a flexible dynamic web of an oil filter screen of an embodiment of the present invention;

FIG. 9 is an enlarged view of portion II of FIG. 8;

FIG. 10 is a cross-sectional view of an oil screen of an embodiment of the present invention;

fig. 11 is an enlarged view of a part iii of fig. 10.

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 invention and to simplify the description, and 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 are therefore not to be considered limiting of the invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

Referring to fig. 1 and 2, the range hood comprises a fume collecting hood 1, a fan frame 2 arranged above the fume collecting hood 1 and a fan 3 arranged in the fan frame 2, wherein an air inlet 11 is formed in the fume collecting hood 1, and an oil filter screen 4 is arranged at the air inlet 11.

Referring to fig. 3 and 4, the oil screen 4 comprises a rigid fixed oil screen 41 and a flexible dynamic oil screen 42. Wherein, the fixed oil screen 41 comprises an oil screen body 411 and a frame 412 arranged on the periphery of the oil screen body 411; the dynamic oil screen 42 comprises a main shaft 421, an elastic filter strip, a first fixing strip 423, a second fixing strip 424, a limiting block 425 and a limiting clamp 426. In the present embodiment, the fixed oil screen 41 has a rectangular shape, and the dynamic oil screen 42 is provided in the frame 412 of the fixed oil screen 41 and corresponds to the oil screen main body 411.

Referring to fig. 7 and 10, in order to filter the oil smoke through the oil filter screen 4 and then enter the air inlet frame 2, a smoke inlet 413 is formed on the oil screen body 411. The oil screen body 411 comprises a first side 414 and a second side 415 which are opposite, the smoke inlet 413 is arranged between the two opposite sides at intervals in parallel, the periphery of the smoke inlet 413 is turned over downstream to form a flange 416, and the flange 416 on the periphery of each smoke inlet 413 gradually closes from upstream to downstream on the oil smoke flow path. The structure is beneficial to the collection of oil, and the direct dripping of the oil on the surface is avoided. The position of the flange 416, which follows the smoke inlet 413, is in a circular arc transition shape, so that a certain rectification effect can be achieved, and the oil smoke touching the fixed oil net 41 can be smoothly introduced into the fan frame 2. The width of the smoke inlet 413 (the dimension in the direction between the first side 414 and the second side 415 of the oil screen body 411) is gradually increased from the middle to the two sides (the first side 414 and the second side 415), and by the arrangement structure, when the oil smoke is small, the oil smoke is less gathered, most of the oil smoke can be sucked from the middle according to the minimum path, and due to the negative pressure of the central part, the oil smoke suction port still has good oil smoke suction characteristics under the small smoke inlet 413, and can better filter the oil smoke; under the condition that the oil smoke is greatly expanded outwards, the smoke inlet 413 with the two larger ends can reduce the movement stroke of the oil smoke entering the fan frame 2 after touching the fixed oil net 41, and the oil smoke can be quickly and smoothly sucked.

Since the oil smoke absorption effect of the single fixed oil screen 41 is limited, in order to improve the oil smoke absorption effect, the dynamic oil screen 42 is installed in the fixed oil screen 41 of the oil filter 4 of the present invention. The main shafts 421 of the dynamic oil screen 42 comprise at least two, the main shafts 421 are positioned at the downstream of the oil screen body 411, the main shafts 421 are arranged between the first side 414 and the second side 415 of the oil screen body 411 in a spaced and parallel mode, namely, the main shafts 421 are parallel to the first side 414 or the second side 415 of the oil screen body 411, and the elastic filter strips are arranged on the main shafts 421. Both ends of the main shaft 421 are provided with the above-mentioned first fixing strip 423 and second fixing strip 424, and the first fixing strip 423 and second fixing strip 424 are arranged upstream and downstream on the lampblack flow path. Both ends of each main shaft 421 are located between the first fixing strip 423 and the second fixing strip 424 to form a movable connection, and the end is provided with the above-mentioned limiting block 425. The main shaft 421 is located at a position between the two smoke inlets 413, preferably in the middle.

The two fixing strips are fixed together by adopting a magnet or a staggered clamping groove and other structures, and the first fixing strip 423 is adsorbed on the oil screen body 411 through the magnet, so that the main shaft 421 is limited in the upstream and downstream directions (the upper and lower limits are shown in fig. 3). Referring to fig. 10 and 11, a limiting structure is provided between the end portions (two end portions corresponding to the first side 414 and the second side 415 of the oil screen body 411) of each pair of the first fixing strip 423 and the second fixing strip 424 and the corresponding rim 412, the limiting structure includes a limiting slot 417 disposed inside the rim 412 and a limiting clip 426 disposed at the end portions of the first fixing strip 423 and the second fixing strip 424, and the limiting clip 426 is insertable into the limiting slot 417 so as to limit the first fixing strip 423 and the second fixing strip 424 between two opposite sides of the rim 412 (left and right limiting is illustrated in fig. 3), and is defined in the rim 412.

Above-mentioned this kind of fixed knot constructs simply reliably, and can realize bare-handed dismantlement, has reduced the washing burden.

Referring to fig. 3 to 6 and 8 to 11, the elastic filter strip extends from the main shaft 421 to the downstream direction, i.e. away from the oil screen body 411. The elastic filter strips comprise a first elastic filter strip 4221 and a second elastic filter strip 4222 which are arranged on each main shaft 421 at intervals, and the elastic filter strips are arranged at intervals along the axial direction of the main shaft 421. The adjacent first elastic filter strips 4221 and second elastic filter strips 4222 extend away from each other from the main shaft 421, and when two or more first elastic filter strips 4221 and two or more second elastic filter strips 4222 are provided, the first elastic filter strips 4221 are preferably parallel to each other, and the second elastic filter strips 4222 are preferably parallel to each other. The first elastic filter strips 422 of one spindle 421 and the second elastic filter strips 4222 of the adjacent spindle 421 extend from the respective spindles 421 toward each other to form a staggered arrangement. Referring to the flow path of the oil smoke shown by the arrows in fig. 10, after passing through the smoke inlet 413 of the fixed oil screen 41, the oil smoke passes through the first elastic filter strip 4221 and the second elastic filter strip 4222 which are staggered, and the high-density elastic filter strips can contact with the oil smoke to enhance the adsorption and filtration of the oil smoke. Simultaneously in the oil smoke motion process, the contact between oil smoke and the filtration that has promoted the equal to a great extent of the whipping of independent each elasticity filter strip and the crisscross swing between each elasticity filter strip of whole, has saved the filter effect of oil smoke greatly.

Referring to fig. 6, the above mentioned high density elastic filter strips refer to a ratio a of the area covered by the smoke inlet 413 to the area uncovered by the smoke inlet 413 projected on the oil screen body 411, and generally, a is not less than 50%.

Referring to fig. 8 and 9, a fan-shaped swing space 427 is formed between the first fixing strip 423 and the second fixing strip 424 at the installation position of the main shaft 421, and a stopper 425 is located in the swing space 427. Therefore, when oil smoke flows through, the end part of the main shaft 421 can swing in the swing space 427, so that the elastic filter strip can realize various movement modes of rotation, left-right movement and up-down movement.

The dynamic oil net 42 is powered by the fluid power generated by sucking air and oil smoke outside the fixed oil net 41 from the smoke inlet 413 under the action of the fan, and the fluid power overcomes the self weight of the dynamic oil net 42 to generate swing. The easy angle of oscillation from the dynamic oil screen 42, the elastic filter strips can be made of light material to reduce the resistance that aerodynamic forces need to overcome the gravity of the dynamic oil screen 42.

The length of each elastic filter strip is not greater than the distance between two adjacent main shafts 421. In order to ensure that the first elastic filter strip 4221 and the second elastic filter strip 4222 on the adjacent main shaft 421 always intersect with each other in operation, the end contact positions of the first elastic filter strip 4221 and the second elastic filter strip 4222 are corresponding to the smoke inlet 413, preferably in the middle. Considering that the minimum angle at which the oil smoke can slide down along the inclined plane without dripping is 12 ° (in the process of movement, the requirement that the minimum angle of left-right turning is not more than 12 ° is realized through the cooperation of the contact surfaces between the limiting blocks 425 and the first fixing strips 423 on the elastic filter strips, and the angle is shown as the angle with the horizontal plane in fig. 10, namely the angle with the oil net body 411), the included angle between the first elastic filter strip 4221 and the second elastic filter strip 4222 on the same main shaft 421 is a, and the numerical value of a is determined according to the position relationship between the oil smoke. The limiting block 425 is fan-shaped, so that the requirement that the minimum angle of left-right turning of the elastic filter strips does not exceed 12 degrees in the movement process is met.

Through setting up above-mentioned reasonable swing angle, the grease that adsorbs on the elasticity filter strip flows into the inside oil groove 418 of oil net body 411 along the elasticity filter strip in, except that the part outside inlet flue 413 and turn-ups 416 constitutes oil groove 418 in the oil net body 411, the unilateral oil leak 419 that is provided with of oil groove 418, oil leak 419 is provided with oil collecting device 5 below oil leak 419, the oil smoke that collects drips into in oil collecting device 5 through oil leak 419. The oil collecting device 5 is arranged at the bottom of the rear side of the smoke collecting hood 1, namely, the oil leakage port 419 is positioned at the rear end of the oil filter screen 4, and the oil collecting device 5 can also collect grease flowing down in the fan frame 2.

Because the contact area of the oil smoke and the oil screen body 411 is limited, the filtering effect is general; if only the dynamic oil net 42 is provided and the fixed oil net 41 is not provided, the collected oil smoke cannot be guided out after being received. Through setting up fixed oil net 41 and developments oil net 42 simultaneously, the smoke inlet 413 of fixed oil net 41 directly faces the staggered department (see the arrow of fig. 10) that arranges elastic filter strip 422, can concentrate the back with the oil smoke gathering, and the concentration is dredged and is carried out the secondary filter for developments oil net 42, realizes that the oil smoke high efficiency is filtered.

In the embodiment, the range hood is of a top-suction type, and it is considered that the air inlet 11 of the fume collecting hood 1 of the current top-suction type range hood is horizontal to the kitchen surface and forms a certain angle with the kitchen surface. In order to ensure that the oil accumulated by the fixed oil screen 41 can smoothly flow into the oil collecting device, the oil screen 4 of the embodiment can adjust the front and rear heights according to the types of the fume collecting hoods 1 so as to meet the requirements of different fume collecting hoods 1 and ensure that the comprehensive performance is more excellent. As shown in fig. 2, the oil screen is installed with the front part high and the rear part low, the oil leakage port 419 is located at the lowest part of the oil screen body 411, and the grease collected in the oil tank 418 can flow to the lowest part under the action of gravity and enter the oil collecting device 5 from the oil leakage port 419. The fixing mode between the oil filter screen 4 and the smoke collecting hood 1 can be various, and can be traditional screw fixation, magnetic attraction fixation, buckle fixation and the like.

Claims

1. The utility model provides an oil strainer, includes fixed oil strainer (41), fixed oil strainer (41) are including oil strainer body (411), seted up smoke inlet (413) on oil strainer body (411), its characterized in that: the oil filter screen also comprises a dynamic oil screen (42), the dynamic oil screen (42) comprises at least two main shafts (421) arranged in parallel and elastic filter strips arranged on the main shafts (421), two ends of each main shaft (421) are movably connected with a fixed oil screen (41) so that the main shafts (421) can swing relative to the oil screen body (411), on an oil smoke flow path, the main shafts (421) are positioned at the downstream of the oil screen body (411), the elastic filter strips extend from the main shafts (421) in a direction away from the oil screen body (411), each elastic filter strip comprises first elastic filter strips (4221) and second elastic filter strips (4222) which are arranged on each main shaft (421) at intervals, each elastic filter strip is arranged along the axial direction of the main shafts (421) at intervals, and the first elastic filter strips (4221) and the second elastic filter strips (4222) which are adjacent on the same main shaft (421) extend from the main shafts (421) in a direction away from each other, the first elastic filter strip (4221) on one spindle (421) and the second elastic filter strip (4222) on the adjacent spindle (421) extend towards each other from the respective spindles (421) to form a staggered arrangement.

2. An oil filter screen according to claim 1, characterized in that: the main shaft (421) is positioned between the two smoke inlets (413).

3. An oil filter screen according to claim 1, characterized in that: the ratio of the area of the smoke inlet (413) covered by the projection of each elastic filter strip on the oil screen body (411) to the area of the smoke inlet (413) uncovered by the elastic filter strip is A, and A is not less than 50%.

4. An oil filter screen according to claim 3, characterized in that: the length of each elastic filter strip is not more than the distance between two adjacent main shafts (421), and the end contact positions of the first elastic filter strip (4221) and the second elastic filter strip (4222) correspond to the middle position of the smoke inlet (413).

5. An oil filter screen according to claim 1, characterized in that: the dynamic oil net (42) further comprises a first fixing strip (423) and a second fixing strip (424) which are arranged at each end of the main shaft (421), the first fixing strip (423) and the second fixing strip (424) are connected with each other and fixedly connected with the fixed oil net (41), the first fixing strip (423) and the second fixing strip (424) are arranged on the oil smoke flow path in an upstream-downstream mode, and the end portion of the main shaft (421) is located between the first fixing strip (423) and the second fixing strip (424) to form movable connection.

6. An oil filter screen according to claim 5, characterized in that: a fan-shaped swing space (427) is formed between the first fixing strip (423) and the second fixing strip (424), and two ends of each main shaft (421) are positioned in the swing space (427) so that the main shafts (421) can swing relative to the oil screen body (411).

7. An oil filter screen according to claim 5, characterized in that: the fixed oil screen (41) further comprises a frame (412) arranged on the periphery of the oil screen body (411), a limiting structure is arranged between the end part of each pair of the first fixing strip (423) and the second fixing strip (424) and the corresponding frame (412), the limiting structure comprises a limiting clamping groove (417) arranged on the inner side of the frame (412) and a limiting clamp (426) arranged at the end part of each of the first fixing strip (423) and the second fixing strip (424), and the limiting clamp (426) is inserted into the limiting clamping groove (417), so that the first fixing strip (423) and the second fixing strip (424) are limited in the frame (412).

8. An oil filter screen according to claim 1, characterized in that: the periphery of the smoke inlet (413) is provided with flanges (416) turned over towards the downstream, on the oil smoke flow path, the flanges (416) on two sides of each smoke inlet (413) are gradually closed from the upstream to the downstream, and the connection part of the flanges (416) and the smoke inlet (413) is in an arc transition shape.

9. A range hood applying the oil filter screen according to any one of claims 1 to 8, comprising a fume collecting hood (1), wherein an air inlet (11) is formed on the fume collecting hood (1), and the range hood is characterized in that: the oil filter screen is arranged at the air inlet (11).

10. The range hood of claim 9, wherein: the oil net is characterized in that an oil groove (418) is formed inside the oil net body (411), an oil leakage opening (419) is formed in the oil groove (418), an oil collecting device (5) is arranged at the bottom of the rear side of the exhaust fume collecting cover (1), and the oil leakage opening (419) is located above the oil collecting device (5).