CN111006275B

CN111006275B - Filter screen and range hood with same

Info

Publication number: CN111006275B
Application number: CN202010006595.7A
Authority: CN
Inventors: 刘剑涛
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2020-01-03
Filing date: 2020-01-03
Publication date: 2022-03-18
Anticipated expiration: 2040-01-03
Also published as: CN111006275A

Abstract

The invention discloses a filter screen, which is characterized in that: the oil net support structure comprises a support main shaft, a first elastic oil net component and a second elastic oil net component, wherein the first elastic oil net component comprises a first elastic oil net and at least two first outer support bars; the second elasticity oil net subassembly includes second elasticity oil net and two at least second outriggers, and the cladding of second elasticity oil net is outside all second outriggers, the one end of second outrigger is used for being connected with the support main shaft, the other end is connected with the periphery of second elasticity oil net for first elasticity oil net and second elasticity oil net are the toper respectively and the size is reduced to the direction of keeping away from by being close to the department gradually. Also discloses a range hood applying the filter screen.

Description

Filter screen and range hood with same

Technical Field

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

Background

The range hood has become one of indispensable kitchen appliances in modern families, utilizes the fluid dynamics principle to work, inhales and exhausts oil smoke through a centrifugal fan arranged in the range hood, and uses a filter screen to filter partial grease particles. 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 filter screen of range hood in the existing market is relatively poor to the filter capacity of oil smoke, and a lot of grease, smoke and dust are finally accumulated in impeller, the spiral case of fan, have influenced range hood's life, bring the noise simultaneously big, the amount of wind reduces the scheduling problem. Present range hood front end filter screen technique still can not satisfy the washing-free requirement of fan impeller, leads to the user when using the cigarette machine, needs to please professional master and master to carry out the specialty to the impeller in two years usually and washs, and user experience is not good.

Most of the existing filter screens are stamped by metal, and in order to meet the good oil filtering effect, multiple layers of oil screens are adopted. The filter screen plate of the range hood disclosed in the Chinese patent with the application number of 201110136803.6 comprises a front panel and a lock catch plate, wherein the front panel is provided with an oil guide groove and an opening, the lock catch plate is positioned at the opening, the surface of the front panel and the oil guide groove are provided with grooves, the side edge of the front panel is folded into a flange, the inner surface of the front panel is provided with the filter screen plate, the flange is tightly attached to the side edge of the filter screen plate, the filter screen plate is formed by superposing a first screen plate, a second screen plate, a third screen plate and a fourth screen plate, the opening is provided with a positioning flange, and the positioning flange is pushed on the filter screen plate.

However, the planar net plates are simply stacked, the filtering effect is not greatly improved, the common filter screen is large in size and difficult to clean, and the difficulty in cleaning is further increased by the multiple layers of oil screens.

Disclosure of Invention

The first technical problem to be solved by the invention is to provide a filter screen which can improve the filtering effect, reduce the noise, reduce the occupied space and facilitate cleaning, aiming at the defects of the prior art.

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

The technical scheme adopted by the invention for solving the first technical problem is as follows: a filter screen, its characterized in that: the oil net support structure comprises a support main shaft, a first elastic oil net component and a second elastic oil net component, wherein the first elastic oil net component comprises a first elastic oil net and at least two first outer support bars; the second elasticity oil net subassembly includes second elasticity oil net and two at least second outriggers, and the cladding of second elasticity oil net is outside all second outriggers, the one end of second outrigger is used for being connected with the support main shaft, the other end is connected with the periphery of second elasticity oil net for first elasticity oil net and second elasticity oil net are the toper respectively and the size is reduced to the direction of keeping away from by being close to the department gradually.

In order to ensure the filtering effect and simultaneously have lower wind resistance and uniformly distributed negative pressure, the meshes arranged on the two elastic oil nets are uniformly distributed, and the effective area or space of the meshes accounts for not less than 50 percent of the whole area or space.

In order to reduce the occupied space of the filter screen and facilitate cleaning, the filter screen further comprises a folding mechanism for folding the first elastic oil screen assembly and the second elastic oil screen assembly, wherein the folding mechanism comprises a fixed cap fixedly arranged at one end part of the supporting main shaft, and a first movable cap and a second movable cap movably sleeved on the supporting main shaft, and the first movable cap is positioned between the fixed cap and the second movable cap; the first elastic oil net component also comprises at least two inner supporting bars, one end of each first outer supporting bar is rotatably connected with the fixed cap, the other end of each first outer supporting bar is connected with the periphery of the first elastic oil net, one end of each inner supporting bar is rotatably connected with the middle part of the first outer supporting bar, and the other end of each inner supporting bar is rotatably connected with the first movable cap; one end of each second external supporting bar is rotatably connected with the second movable cap, and the other end of each second external supporting bar is connected with the periphery of the second elastic oil net.

In order to ensure the positioning of the first elastic oil net component during unfolding, a first elastic switch is arranged in the supporting main shaft, a first clamping part of the first elastic switch keeps the trend of extending out of the supporting main shaft, and the first elastic switch is abutted against the first movable cap so as to prevent the first movable cap from moving towards the direction of the fixed cap.

In order to ensure the positioning of the second elastic oil net component when the second elastic oil net component is unfolded, a second elastic switch is arranged in the supporting main shaft, a second clamping part of the second elastic switch keeps the trend of extending out of the supporting main shaft, and the second elastic switch is abutted against the second movable cap so as to prevent the second movable cap from moving towards the direction far away from the first movable cap.

The first elastic switch and the second elastic switch can be two or more, and can be adjusted at multiple inclination angles to adapt to different use environments. In addition, a magnet, a nut structure, or the like may be used instead of the elastic switch.

In order to enable the filter screen to be suitable for the smoke collecting hoods with different air inlet sizes, a spring is connected between the first movable cap and the second movable cap.

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 filter screen, includes the collection petticoat pipe, set up air intake, its characterized in that on the collection petticoat pipe: the first elastic oil screen assembly is integrally arranged above the air inlet in a conical manner, and the second elastic oil screen assembly is integrally arranged below the air inlet in an inverted conical manner.

For avoiding the oil smoke to leak, the unfiltered enters the fan frame, the end part of the second movable cap far away from the second outer supporting strip is abutted against the position of the smoke collecting cover at the periphery of the air inlet.

In order to avoid the limitation of the filter screen above the air inlet, the maximum projection radius of the first elastic oil screen exceeds the air inlet when the first elastic oil screen is unfolded above the air inlet of the fume collecting hood.

In order to collect collected grease on the two elastic oil nets conveniently, an oil collecting groove is arranged below the supporting main shaft, and the top end of the oil collecting groove is open.

Compared with the prior art, the invention has the advantages that: the double-layer oil screen can realize multiple times of filtering of oil smoke, good filtering and purifying effects are realized, the first elastic oil screen can extend into the smoke collecting hood and is directly distributed outside, noise generated when the oil smoke flows through is reduced, meanwhile, the second elastic oil screen in the shape of an inverted cone is beneficial to smooth flowing of oil liquid attached to the upper part into an oil collecting tank at the bottom along the screen wall on one hand, and after the oil liquid forms a film on the surface of the oil screen for a short time, the whole oil screen is equivalent to an internal flow guide structure and can guide the oil smoke to a position closer to an air inlet of the fan; in addition, the second elastic oil net simultaneously serves as a flow guide device for oil; the meshes of the elastic oil net are uniformly distributed, so that negative pressure can be uniformly distributed, and multi-dimensional oil smoke absorption is realized; by arranging the folding mechanism, the first elastic oil screen and the second elastic oil screen can be folded and unfolded, and when the oil screen is cleaned, the space area of the oil screen can be obviously reduced compared with a fixed oil screen with the same size, so that the cleaning convenience is greatly improved, meanwhile, the whole elastic oil screen is of a planar structure, dead angles such as stamping, convenient bending and the like for fixing the oil screen are avoided, the cleaning efficiency and effect can be improved, the mounting and dismounting operation is convenient, and the operation experience of a user is improved; the elastic oil net can be suitable for deep cleaning modes such as soaking and kneading, and has a good cleaning effect.

Drawings

FIG. 1 is a schematic view of a strainer according to an embodiment of the present invention (with the mesh openings of two elastic oil screens omitted);

FIG. 2 is a schematic exploded view of a strainer according to an embodiment of the present invention (two elastic oil nets are omitted);

FIG. 3 is a cross-sectional view of a first embodiment of a screen according to an embodiment of the present invention in an installed condition;

FIG. 4 is a cross-sectional view of a second embodiment of a screen according to an embodiment of the present invention in an installed condition;

FIG. 5 is a schematic view of the application of the filter screen of the embodiment of the present invention to a range hood (omitting the meshes of two elastic oil screens);

fig. 6 is a sectional view of the range hood according to the embodiment of the present invention (the meshes of the two elastic oil nets are omitted).

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 and 2, a filter screen includes a support main shaft 1, a first elastic oil screen assembly 2, a second elastic oil screen assembly 3, and a folding mechanism 4.

The first elastic oil screen assembly 2 includes a first elastic oil screen 21, at least two first outer support bars 22, and at least two inner support bars 23. The second elastic oil net assembly 3 includes a second elastic oil net 31 and at least two second external support bars 32. The first elastic oil net 21 covers all the first outer supporting bars 22, and the second elastic oil net 31 covers all the second outer supporting bars 32. The

meshes

211 and 311 arranged on the two elastic oil nets are uniformly distributed, and the effective area (or the space accounts for the specific volume) of the meshes is not less than 50 percent of the whole area (or the space accounts for the specific volume).

The folding mechanism 4 comprises a fixed cap 41 fixedly arranged at one end part of the supporting main shaft 1, and a first movable cap 42 and a second movable cap 43 movably sleeved on the supporting main shaft 1, wherein the first movable cap 42 and the second movable cap 43 can slide along the supporting main shaft 1. In the drawing of the present embodiment, the fixed cap 41 is disposed at the top end of the support main shaft 1, and the second movable cap 43 is disposed below the first movable cap 42.

One end of each first outer support bar 22 is rotatably connected with the fixing cap 41, the other end is connected with the periphery of the first elastic oil net 21, one end of each inner support bar 23 is rotatably connected with the middle of the first outer support bar 22, the other end is rotatably connected with the first movable cap 42, and each first outer support bar 22 is in a cone shape in a fully unfolded state, so that the first elastic oil net 21 is in a cone shape. The first elastic oil net assembly 2 is of an umbrella-like structure as a whole. The first elastic switch 44 is arranged in the support main shaft 1, the first elastic switch 44 is positioned on one side of the first movable cap 42 away from the fixed cap 41, the first clamping portion 441 of the first elastic switch 44 keeps the trend of extending out of the support main shaft 1, when the first outer support strip 22 and the inner support strip 23 are opened and closed to the maximum position, the first movable cap 42 can go upwards over the first elastic switch 44, so that the first clamping portion 441 of the first elastic switch 44 can be abutted against the upper end of the first movable cap 42, the first movable cap 42 is limited from moving towards the direction close to the fixed cap 41, and the completely unfolded state is presented.

Referring to fig. 3 to 6, the range hood 1 includes a fume collecting hood 6, and a fan frame 7 disposed above the fume collecting hood 6, and a fan system 8 is disposed in the fan frame 7. When the filter screen is installed on the range hood, the filter screen is installed at the air inlet 61 formed on the fume collecting hood 6 of the range hood. Before the first elastic oil screen assembly 2 is installed, the first elastic oil screen assembly is in a non-fully unfolded state and can easily cross over the air inlet 61 of the smoke collecting hood 6. After the first elastic switch 44 is completely passed, the first movable cap 42 moves downwards to the first elastic switch 44, so that the first elastic switch 44 is compressed and contracted, the first movable cap 42 continues to move downwards to the position below the first elastic switch 44, and then the first elastic switch 44 is reset, so that the first movable cap 42 is limited below the first elastic switch 44, the first elastic oil net 21 is unfolded above the air inlet 61 of the exhaust fume collecting hood 6, and the maximum projection radius exceeds the air inlet 61 and can be limited above the air inlet 61.

One end of each second supporting bar 32 is rotatably connected with the second movable cap 43, and the other end is connected with the periphery of the second elastic oil net 31, and each second supporting bar 32 is inverted-cone-shaped after being unfolded, so that the second elastic oil net 31 is inverted-cone-shaped. That is, the first elastic oil mesh 21 and the first elastic oil mesh 31 have the largest size at the positions close to each other and gradually decrease in the direction away from each other. In order to realize that the second elastic oil screen assembly 3 is adapted to the mounting surface of the air inlet 61 of the smoke collecting hood 6 in different states, a spring 45 is arranged between the first movable cap 42 and the second movable cap 43, the spring 45 is sleeved on the supporting main shaft 1, and one end of the spring 45 is fixedly connected with the first movable cap 42 while the other end is fixedly connected with the second movable cap 43. A second elastic switch 46 is provided between the first movable cap 42 and the second movable cap 43, and a second engaging portion 461 of the second elastic switch 46 keeps a tendency of extending out of the support main shaft 1, and the position of the second movable cap 43 can be restricted. Referring to fig. 3, the second elastic switch 46 is one. Referring to fig. 4, in an alternative embodiment, the second elastic switch 46 has at least two, and is spaced along the axial direction of the support main shaft 1, and the first elastic switch 44 may also have at least two, and is spaced along the axial direction of the support main shaft 1.

When the second elastic oil net assembly 3 is installed, the second movable cap 43 is lifted to the second elastic switch 46, so that the second elastic switch 46 abuts against the lower end of the second movable cap 43, thereby realizing that the two elastic oil net assemblies are effectively fixed on the upper side and the lower side of the air inlet 61 of the smoke collecting hood 6, referring to fig. 3, 4 and 6 (the meshes of the two elastic oil nets are omitted in fig. 6), and at this time, the end part of the second outer supporting strip 32 far away from the second movable cap 43 abuts against the position of the smoke collecting hood 1 on the periphery of the air inlet 11. The spring 45 always applies upward pulling force to the second movable cap 43, so that effective contact between the second elastic oil net 31 and the smoke collecting hood 6 is realized, and uncertainty of the fitting state of the smoke collecting hood 6 caused by fixing only by an elastic switch is made up.

An oil collecting tank 5 is arranged below the supporting main shaft 1, and the top end of the oil collecting tank 5 is open.

Through the first elasticity oil net 21 and the second elasticity oil net 31 of above-mentioned structure, first elasticity oil net 21 stretches into in the collection petticoat pipe 6, externally for direct distribution, the noise that produces when having reduced the oil smoke and flowing through, simultaneously, the second elasticity oil net 31 of back taper is favorable to attached to the fluid on upper portion on the one hand and flows into the bottom oil trap smoothly along the net wall, simultaneously, after fluid is at the short membrane of oil net surface, whole oil net is equivalent to an inside water conservancy diversion structure, can be with the position that the oil smoke direction is close to the air intake of fan more. In addition to filtering soot, the second flexible oil net 31 also serves as a flow guide for oil in the upper fan system 8, and the oil accumulated in the upper portion flows from the meshes of the first flexible oil net 21 to the second flexible oil net 31 in the lower portion, and finally flows into the oil collecting tank 5 at the bottom along the second flexible oil net 31. Simultaneously, the same with the first elasticity oil net 21 on upper portion, second elasticity oil net 31 acts as the effect of certain guide plate, and the whole mesh equipartition of second elasticity oil net 31 can be with the negative pressure equipartition to realize the multidimension degree to the absorption of oil smoke.

Claims

1. A filter screen, its characterized in that: the supporting device comprises a supporting main shaft (1), a first elastic oil net component (2) and a second elastic oil net component (3), wherein the first elastic oil net component (2) comprises a first elastic oil net (21) and at least two first outer supporting strips (22), the first elastic oil net (21) covers all the first outer supporting strips (22), one end of each first outer supporting strip (22) is used for being connected with the supporting main shaft (1), and the other end of each first outer supporting strip is connected with the periphery of the first elastic oil net (21); second elasticity oil net subassembly (3) include second elasticity oil net (31) and two at least second outriggers (32), and second elasticity oil net (31) cladding is outside all second outriggers (32), the one end of second outrigger (32) is used for being connected with support main shaft (1), the other end is connected with the periphery of second elasticity oil net (31) for first elasticity oil net (21) and second elasticity oil net (31) are the toper respectively, and the size is reduced gradually by the direction of being close to each other to keeping away from each other.

2. The screen of claim 1, wherein: the meshes arranged on the two elastic oil nets are uniformly distributed, and the effective area or space of the meshes accounts for not less than 50% of the whole area or space.

3. The screen of claim 1, wherein: the folding mechanism (4) is used for folding the first elastic oil net component (2) and the second elastic oil net component (3), the folding mechanism (4) comprises a fixed cap (41) fixedly arranged at one end of the supporting main shaft (1), a first movable cap (42) and a second movable cap (43) which are movably sleeved on the supporting main shaft (1), and the first movable cap (42) is positioned between the fixed cap (41) and the second movable cap (43); the first elastic oil net assembly (2) further comprises at least two inner supporting bars (23), one end of each first outer supporting bar (22) is rotatably connected with the fixed cap (41), the other end of each first outer supporting bar is connected with the periphery of the first elastic oil net (21), one end of each inner supporting bar (23) is rotatably connected with the middle part of the first outer supporting bar (22), and the other end of each inner supporting bar is rotatably connected with the first movable cap (42); one end of each second external supporting bar (32) is rotatably connected with the second movable cap (43), and the other end of each second external supporting bar is connected with the periphery of the second elastic oil net (31).

4. The screen of claim 3, wherein: a first elastic switch (44) is arranged in the supporting main shaft (1), a first clamping part (441) of the first elastic switch (44) keeps the trend of extending out of the supporting main shaft (1), and the first elastic switch (44) is abutted against the first movable cap (42) to block the first movable cap (42) from moving towards the direction of the fixed cap (41).

5. The screen of claim 3, wherein: a second elastic switch (46) is arranged in the supporting main shaft (1), a second clamping part (461) of the second elastic switch (46) keeps the trend of extending out of the supporting main shaft (1), and the second elastic switch (46) is abutted against a second movable cap (43) to block the second movable cap (43) from moving in the direction away from the first movable cap (42).

6. The screen of claim 3, wherein: a spring (45) is connected between the first movable cap (42) and the second movable cap (43).

7. A range hood applying the filter screen of any one of claims 3 to 6, comprising a fume collecting hood (6), wherein an air inlet (61) is formed on the fume collecting hood (6), and the range hood is characterized in that: first elasticity oil net subassembly (2) wholly is the toper and sets up in air intake (61) top, second elasticity oil net subassembly (3) wholly is the back taper and sets up in air intake (61) below.

8. The range hood of claim 7, wherein: the end part of the second external support bar (32) far away from the second movable cap (43) is abutted with the position of the smoke collecting hood (6) on the periphery of the air inlet (61).

9. The range hood of claim 7, wherein: the maximum projection radius of the first elastic oil net (21) when the first elastic oil net is unfolded above the air inlet (61) of the fume collecting hood (6) exceeds the air inlet (61).

10. The range hood of claim 7, wherein: an oil collecting tank (5) is arranged below the supporting main shaft (1), and the top end of the oil collecting tank (5) is open.