CN113639290B

CN113639290B - Fume exhaust fan

Info

Publication number: CN113639290B
Application number: CN202111008836.2A
Authority: CN
Inventors: 何立博
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2022-11-11
Anticipated expiration: 2041-08-31
Also published as: CN113639290A

Abstract

The invention discloses a range hood, which comprises a smoke collecting hood, a fan frame arranged above the smoke collecting hood and a fan system arranged in the fan frame, wherein the smoke collecting hood is provided with an air inlet, and a fixed filter screen is arranged at the air inlet, and the range hood is characterized in that: the below that is located the fan system in the fan frame is provided with and moves filter screen, fixed filter screen and direction net, fixed filter screen is fixed to be set up the inboard in the fan frame, thereby move the filter screen can move from top to bottom and change and fix the clearance between the filter screen, the left side passageway or the right side passageway in the fan frame can be selectively closed or reduced to the direction net. Compared with the prior art, the invention has the advantages that: through setting up both can adjust double-deck filter screen clearance, also can adjust the movable filter screen, fixed filter screen and the direction net of the left and right sides air inlet state, and then adjust resistance and oil strain ability, adapt to the multi-scene operating mode of different cooks.

Description

Cooking fume exhauster

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, accelerated by the fan and then collected and guided by the volute to be discharged out of a room.

The range hood has the advantages of fashionable and concise appearance, larger air volume, suitability for larger space, capability of capturing oil smoke far away from the cooking bench, and the defect that the installation height is far away from the cooking bench, and the oil smoke above a pot is easy to cause the oil smoke to escape to the periphery due to the disturbance generated by ambient air under the cooking state with small oil smoke volume, thereby causing poor oil smoke absorption effect.

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

The range hood adopting the smoke guide plate has no oil dripping and good smoke suction effect, and has more and more extensive application in recent years. The existing range hood adopting the smoke guide plate often has the following disadvantages:

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

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

Disclosure of Invention

The technical problem to be solved by the invention is to provide the range hood aiming at the defects in the prior art, which can realize the matching of the air inlet area and the distribution of resistance to the cooking condition and improve the oil smoke absorption effect.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a range hood, includes collection petticoat pipe, sets up in the fan frame of collection petticoat pipe top and sets up the fan system in the fan frame, the air intake has been seted up on the collection petticoat pipe, air intake department is provided with fixed filter screen, its characterized in that: the below that is located the fan system in the fan frame is provided with and moves filter screen, fixed filter screen and direction net, fixed filter screen is fixed to be set up the inboard in the fan frame, thereby move the filter screen can move from top to bottom and change and fix the clearance between the filter screen, the left side passageway or the right side passageway in the fan frame can be selectively closed or reduced to the direction net.

Preferably, in order to facilitate the closing and opening of the guide net, the guide net comprises a frame and a guide blade group, and the guide blade group is provided with two groups and is arranged at intervals left and right; each guide blade group comprises at least two blades which are arranged at intervals left and right, two ends of each blade are respectively and rotatably connected with the frame through connecting shafts, the connecting shafts extend in the front and rear directions, and each guide blade group keeps the trend of opening the channel between every two adjacent blades.

In order to facilitate the driving of the opening and closing of the set of vanes, each vane is provided with a first link, each of which is connected to a second link extending in the left-right direction, the first link being rotatably connected to the second link.

Preferably, in order to keep the opening tendency of the blades, a torsion spring is arranged at one end of the connecting shaft, and two ends of the torsion spring are respectively abutted against the inner sides of the blades and the frame, so that the blades keep the tendency of opening the channel between every two adjacent blades in a vertical manner.

Preferably, in order to facilitate the stable and reliable movement of the movable filter screen and the guide screen, the range hood further comprises a movement mechanism for driving the movable filter screen to move up and down and driving the blades of the guide screen to rotate, and the movable filter screen and the guide screen are linked.

In order to facilitate the driving of the movable filter screen to move up and down and the blades of the guide screen to rotate, the movement mechanism comprises a sliding rail, a cam and a cam outer frame which are limited to move up and down, the sliding rail is fixedly connected with the movable filter screen, the cam outer frame comprises a frame and a pushing part, the cam is arranged in the frame, the cam can rotationally push the frame to move up and down and move left and right, the pushing part penetrates through the sliding rail and is in sliding fit with the sliding rail, the pushing part can drive the sliding rail to move up and down when moving up and down along with the frame, and the pushing part can push a second connecting rod of a left guide blade group or a second connecting rod of a right guide blade group when moving left and right along with the frame.

Preferably, in order to facilitate the pushing of the second connecting rod of the guide net and avoid interference of components, a push rod is arranged on the pushing portion and can push the second connecting rod of the guide net.

In order to facilitate the limitation of the sliding path of the sliding rail, the moving mechanism further comprises a guide bracket fixedly arranged on the inner side of the fan frame, and the sliding rail vertically extends through the guide bracket and is in sliding fit with the guide bracket.

Preferably, in order to drive the cam to rotate, the moving mechanism further comprises a driving mechanism for connecting with an eccentric position of the cam to drive the cam to rotate.

In order to improve the filtering efficiency, the corresponding meshes of the movable filter screen and the fixed filter screen are arranged in a staggered manner.

Compared with the prior art, the invention has the advantages that: the gap between the double-layer filter screens can be adjusted, and the movable filter screens, the fixed filter screens and the guide screens in air inlet states on the left side and the right side can also be adjusted, so that the resistance and the oil filtering capability are adjusted, and the multi-scene working conditions of different cookings are adapted; the moving mechanism of the pushing part of the sliding rail is driven by a set of cam, so that the up-and-down movement of the moving filter screen and the rotation of the blades of the guide screen are realized, the cost is low, and the moving mechanism is stable and reliable.

Drawings

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

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

FIG. 3 is a schematic view of a movable filter screen, a fixed filter screen, a guide screen and a movement mechanism thereof of the range hood of FIG. 2;

FIG. 4 is an exploded view of the movable, fixed, and guide screens and their moving mechanisms of FIG. 3;

fig. 5 is an exploded view of the guiding net of the range hood according to the embodiment of the present invention;

fig. 6 is a sectional view of the range hood in the second state according to the embodiment of the present invention;

FIG. 7 is an enlarged partial schematic view of FIG. 6;

fig. 8 is a sectional view of the range hood according to the embodiment of the present invention in a third state;

FIG. 9 is an enlarged partial schematic view of FIG. 8;

fig. 10 is a sectional view of the range hood according to the embodiment of the present invention in a fourth state;

FIG. 11 is an enlarged partial schematic view of FIG. 10;

fig. 12 is a sectional view of a range hood according to an embodiment of the present invention in a fifth state;

FIG. 13 is an enlarged partial schematic view of FIG. 12;

fig. 14 is a sectional view of a range hood according to an embodiment of the present invention in a sixth state;

fig. 15 is a partially enlarged view of fig. 14.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar functions.

In the description of the present invention, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and for simplicity of description, and do not 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 only and are not to be construed as limiting, for example, "upper" and "lower" are not necessarily limited to directions opposite 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 5, a range hood, which is a ceiling range hood, includes a fume collecting hood 1 and a fan frame 2 disposed above the fume collecting hood 1, and a fan system 3 is disposed in the fan frame 2. The smoke collecting cover 1 is provided with an air inlet 11, so that the oil smoke can enter the fan frame 2 from the air inlet 11 in the upward rising process and is discharged by the fan system 3. The bottom of the fume collecting hood 1 is upwards sunken to form a fume collecting cavity 12, and the air inlet 11 is positioned at the top of the fume collecting cavity 12.

The space in the fan frame 2 below the fan system 3 is divided into a left channel and a right channel. Below the fan system 3, i.e. in the cooking fume flow path, upstream of the fan system 3, inside the fan frame 2, there are arranged a moving screen 41, a fixed screen 42 and a guiding screen 43, each of which is preferably in the form of a flat plate, wherein the moving screen 41 and the guiding screen 43 are movable inside the fan frame 2. The lower part of the air inlet 11 is provided with a smoke guide plate 6, and as in the prior art, oil smoke enters the inside of the fan frame 2 through the air inlet 11 from a channel between the periphery of the smoke guide plate assembly and the smoke collection cover 1. Preferably, the fixed screen 42, the moving screen 41 and the guide screen 43 are sequentially disposed from bottom to top.

The moving screen 41, the fixed screen 42 and the guide screen 43 are plate members having mesh holes, which can change resistance, and which can move inside the fan frame 2. Preferably, the movable filter screen 41 and the fixed filter screen 42 are both grid-type screens, and the corresponding meshes of the movable filter screen 41 and the fixed filter screen 42 are arranged in a staggered manner, so that the lampblack can pass through the fixed filter screen 42 from the movable filter screen 41 to the fixed filter screen 42 by changing a certain path, and the filtering efficiency is improved. The widths of the movable filter screen 41 and the fixed filter screen 42 in the left-right direction are smaller than the width of the fan frame 2 in the left-right direction. The fixed screen 42 is preferably provided at an intermediate position in the left-right direction in the fan frame 2.

The guide net 43 includes a rectangular frame 431 and guide blade groups 432, and the guide blade groups 432 have two groups and are arranged at a left-right interval. Each guide vane group 432 includes at least two vanes 4321 arranged at a left-right interval, each vane 4321 extends in the front-rear direction, both ends of each vane 4321 are rotatably connected to the rim 431 by a connecting shaft 4322, respectively, and the connecting shaft 4322 extends in the front-rear direction. Each of the blades 4321 is provided with a first link 4323, each of the first links 4323 is connected to a second link 4324, the second link 4324 extends in a left-right direction, and the first link 4323 is rotatably connected to the second link 4324. One end of the connecting shaft 4322 is provided with a torsion spring 4325, and two ends of the torsion spring 4325 can respectively abut against the inner sides of the vanes 4321 and the rim 431, so that the vanes 4321 keep vertical and tend to open the passage between two adjacent vanes 4321.

The inside of the fan frame 2 is also provided with a movement mechanism for driving the movable filter screen 41 and the guide screen 43 to move, and the movable filter screen 41 and the guide screen 43 can move independently or can be linked through one movement mechanism. In the present embodiment, the movable filter screen 41 and the guide screen 43 are linked, and the moving mechanism includes a slide rail 71, a guide bracket 72, a cam 73, a cam outer frame 74, and a driving mechanism 75. The guide bracket 72 may be directly fixed to the inside of the fan frame 2, or may be indirectly fixed to the inside of the fan frame 2 by a mounting plate or the like. The slide rail 71 extends up and down through the guide bracket 72 and is slidably fitted to the guide bracket 72. In this embodiment, the guide bracket 72 is disposed at the rear side in the blower housing 2, and the moving screen 41, the fixed screen 42, and the guide screen 43 are disposed at the front side of the guide bracket 72.

The cam outer frame 74 includes a frame 741 and a pushing portion 742, and the cam 73 is disposed in the frame 741. The drive means 75 is a rotary drive means, preferably a motor, the output of which can be connected directly or indirectly to an eccentric position of the cam 73, whereby the cam 73 can be driven in rotation. The rotational shaft of the cam 73 extends in the front-rear direction. The cam 73 can abut against the inner side wall of the frame 741 to form a cam coupling pair. The pushing portion 742 is formed at a side surface of the frame 741, extends in the left-right direction, and passes through the slide rail 71 so as to be slidably engaged with the slide rail 71. Two push rods 743 are provided on the pushing portion 742 at a left-right interval, and the push rods 743 extend forward from the pushing portion 742. The push rod 743 is located between the second links 4324 of the two guide blade groups 432 of the guide net 43. When the push rod 743 moves left and right to contact one of the second links 4324, if the left push rod 743 contacts the left second link 4324, the left second link 4324 moves left to overcome the force of the torsion spring 4325, so that the vane 4321 rotates relative to the outer frame 431 to reduce the air intake area of the passage of the adjacent vane 4321. Thereafter, when the push rod 743 at the left side leaves the second link 4324, the leaf 4321 is returned by the torsion spring 4325. Alternatively, only one pushrod 743 may be provided.

When the cam 73 is driven to rotate by the driving mechanism 75, the frame 741 can be pushed to move circumferentially up, down, left and right, and the motion path is square or rectangular. On this trajectory, the up-down time and the left-right time are separated, and therefore the slide rail 71 can be moved up and down by the up-down movement.

The fixed screen 42 may be attached to the inside of the fan frame 2 directly or indirectly. The movable filter screen 41 is connected and fixed on the slide rail 71, and can move up and down along with the slide rail 71 to adjust the gap between the movable filter screen and the fixed filter screen 42.

In the actual use process, the condition of stir-frying on one side of the kitchen range under the range hood is more, but the other side is not used or has no smoke, and the cooking state can be switched between large smoke and small smoke. The oil filtering capacity and the resistance are a pair of related contradictions, and the two are difficult to be considered on the common range hood, but in the invention, the change of the air inlet channels on the left side and the right side through the guide net 43 can be adjusted according to the oil smoke condition of the working condition through the movement of the movable filter net 41 and the guide net 43, so that the open side of the channel is positioned on the large oil smoke side, the gap between the movable filter net 41 and the fixed filter net 42 can be adjusted according to the smoke volume or the system resistance so as to change the system resistance, the large oil smoke preferentially ensures the oil smoke absorption, and the small oil smoke preferentially ensures the oil filtering.

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

Referring to fig. 2, the first operating state of the range hood of the present invention is suitable for the cooking state of small oil smoke on the left side, and at this time, the gap between the movable filter screen 41 and the fixed filter screen 42 is small, the oil filtration is first and sufficient, the left guide vane set 432 is opened, and the right guide vane set 432 is closed, so that the left side is the main air intake channel. Vice versa, see fig. 12 and 13.

Referring to fig. 6 and 7, the second operating state of the range hood of the present invention is suitable for the cooking state of large oil smoke on the left side, the gap between the movable filter screen 41 and the fixed filter screen 42 is large, the effect of oil smoke absorption is first, ensuring that oil smoke is absorbed first, the oil filtering effect is properly broadened to reduce resistance and increase air volume, the guide vane set 432 on the left side is opened, and the guide vane 432 on the right side is closed, so that the left side is the main air intake channel. Vice versa, see fig. 10 and 11.

Referring to fig. 8 and 9, a third operating state of the range hood of the present invention is suitable for cooking in almost both left and right sides, and when both are large oil smoke, the gap between the movable filter screen 41 and the fixed filter screen 42 is large, the oil smoke absorption effect is preferred, it is ensured that the oil smoke is absorbed first, the oil filtration effect is properly widened to reduce the resistance, and the air volume is increased, and both the two guide blade sets 432 are opened, so that the left and right side channels are consistent.

Referring to fig. 14 and 15, a sixth operating state of the range hood of the present invention is suitable for cooking in almost the same cooking state on both left and right sides, and the cooking state is a large oil smoke, and when the left side is slightly larger than the right side, the rotation angle of the blade 4322 of the left guide blade set 432 is slightly reduced, so as to achieve high-precision dynamic flow distribution.

Claims

1. The utility model provides a range hood, includes collection petticoat pipe (1), sets up fan frame (2) and fan system (3) of setting in fan frame (2) in collection petticoat pipe (1) top, air intake (11), its characterized in that have been seted up on collection petticoat pipe (1): a movable filter screen (41), a fixed filter screen (42) and a guide screen (43) are arranged below the fan system (3) in the fan frame (2), the fixed filter screen (42) is fixedly arranged on the inner side of the fan frame (2), the movable filter screen (4) can move up and down to change a gap between the movable filter screen and the fixed filter screen (42), the corresponding mesh holes of the movable filter screen (41) and the fixed filter screen (42) are arranged in a staggered mode, and the guide screen (43) can selectively close or reduce a left channel or a right channel in the fan frame (2);

the guide net (43) comprises two groups of guide blades (432) which are arranged at intervals left and right; each guide blade group (432) comprises at least two blades (4321) arranged at intervals left and right, each blade (4321) is provided with a first connecting rod (4323), each first connecting rod (4323) is connected to a second connecting rod (4324), the second connecting rods (4324) extend in the left and right direction, and the first connecting rods (4323) are rotatably connected with the second connecting rods (4324);

the range hood also comprises a movement mechanism for driving the movable filter screen (41) to move up and down and driving the blades (4321) of the guide net (43) to rotate, wherein the movable filter screen (41) is linked with the guide net (43); the moving mechanism comprises a sliding rail (71) limited to move in the vertical direction, a cam (73) and a cam outer frame (74), the sliding rail (71) is fixedly connected with the movable filter screen (41), the cam outer frame (74) comprises a frame (741) and a pushing portion (742), the cam (73) is arranged in the frame (741), the cam (73) can rotatably push the frame (741) to move up and down and move left and right, the pushing portion (742) penetrates through the sliding rail (71) and is in sliding fit with the sliding rail (71), the pushing portion (742) can drive the sliding rail (71) to move up and down when moving up and down along with the frame (741), and the pushing portion (742) can push a second connecting rod (4324) of the left guide vane group (432) or a second connecting rod (4324) of the right guide vane group (432) when moving left and right along with the frame (741).

2. The range hood of claim 1, wherein: the guide net (43) includes a frame (431), both ends of each vane (4321) are rotatably connected to the frame (431) by a connecting shaft (4322), respectively, the connecting shaft (4322) extends in the front and rear direction, and each guide vane group (432) maintains a tendency of opening a passage between adjacent two vanes (4321).

3. The range hood of claim 2, wherein: one end of the connecting shaft (4322) is provided with a torsion spring (4325), and two ends of the torsion spring (4325) are respectively abutted against the inner sides of the blades (4321) and the frame (431), so that the blades (4321) keep a vertical trend to open a channel between two adjacent blades (4321).

4. The range hood of claim 1, wherein: the pushing part (742) is provided with a push rod (743), and the push rod (743) can push a second connecting rod (4324) of the guide net (43).

5. The range hood of claim 1, wherein: the moving mechanism further comprises a guide support (72) fixedly arranged on the inner side of the fan frame (2), and the sliding rail (71) vertically extends through the guide support (72) and is in sliding fit with the guide support (72).

6. The range hood of claim 1, wherein: the movement mechanism further comprises a driving mechanism (75) connected with the eccentric position of the cam (73) so as to drive the cam (73) to rotate.