CN111780180A

CN111780180A - Fume exhaust fan

Info

Publication number: CN111780180A
Application number: CN202010619964.XA
Authority: CN
Inventors: 王磊; 徐鑫
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2020-10-16
Anticipated expiration: 2040-06-30
Also published as: CN111780180B

Abstract

The invention discloses a range hood, which comprises a box body and a fan system arranged in the box body, wherein the fan system is provided with a fan air inlet facing to the front side, the front side and the bottom of the box body are both open, the bottom of the box body forms the air inlet, the front side of the box body is provided with a smoke baffle plate which can turn over relative to the box body, one side of the smoke baffle plate facing to the box body is also provided with a baffle plate, and the baffle plate corresponds to the lower part of the fan system. Compared with the prior art, the invention has the advantages that: by arranging the baffle, the steep increase of the air inlet area at the bottom can be avoided, so that the excessive pressure relief of a fan system is avoided, and the oil smoke absorption effect is improved; the pressure stabilizing cavity is formed above the baffle plate to realize the homogenization of the flow velocity at the air inlet of the fan, the cage smoke cavity is formed below the baffle plate to improve the oil smoke impact bearing capacity, and the two cavities jointly realize the improvement of the oil smoke absorption effect.

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

In order to improve the effect of oil smoke absorption, it is common practice to increase the area covered by the air inlet. An embedded smoke ventilator as that chinese patent application number 201420415153.8 discloses, including fan and box, its characterized in that: the box includes front bezel, back plate, upper plate, hypoplastron, left side board and right side board, is located to be equipped with the grid baffle between front bezel and the back plate in the box, forms the holding chamber between grid baffle in the box and the back plate, and the fan is installed in this holding intracavity, is equipped with the exhaust fume duct who communicates with the air outlet of fan on the box, and the front bezel can overturn and be connected with the box.

In order to enable the air inlet to cover a larger area, the whole front plate is designed to be overturned to form the thin range hood which has a light and thin appearance, but because the inner cavity is narrow, the air distribution in the transverse direction of the range hood is not uniform, and good range hood effect is difficult to ensure; in addition, the fan noise can not be isolated by an open structure, and the fan noise has larger noise in work, so that interference is caused to users.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a range hood, aiming at the defects in the prior art, which can realize uniform air distribution and improve the range hood effect.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a range hood, includes the box and sets up the fan system in the box, the fan system has the fan air intake towards the front side, its characterized in that: the front side and the bottom of box are all uncovered, the bottom of box forms the air intake, the front side of box is provided with the cigarette board that keeps off that can the relative box upset, keep off the cigarette board and still be provided with the baffle towards one side in the box, the baffle corresponds the below of fan system.

Preferably, the connection mode that keeps off the cigarette board does, keep off the cigarette board and rotate through the pivot on the top of top and box and be connected, the pivot that keeps off the cigarette board extends in the left and right directions.

In order to ensure that the condensed oil on the baffle can be far away from the smoke baffle and flows into the box body, when the smoke baffle is in a forward overturning opening state, the included angle between the smoke baffle and the vertical surface is theta, the included angle between the baffle and the horizontal plane is beta, and theta < beta is met.

For avoiding the oil smoke to escape from both sides, ensure simultaneously that the oil smoke velocity of flow that gets into the fan air intake is even, the left and right sides that keeps off the cigarette board is provided with the curb plate along with keeping off the cigarette board action respectively, works as keep off the cigarette board and be in when the open mode of upset forward, the curb plate part is located the left and right sides in box the place ahead at least to one side that keeps away from the cigarette board of curb plate does not surpass the box front side, keep off cigarette board, baffle, curb plate and box and enclose into voltage stabilizing area jointly.

Preferably, in order to better guide the oil smoke, the side plate is in a shape of a wing with a small top and a large bottom, one straight edge of the side plate is connected with one side of the smoke baffle plate facing the inside of the box body, the other straight edge of the side plate is a free edge, and the bottom edge of the side plate is in an arc shape protruding downwards.

In order to ensure that the smoke baffle is at any position, the condensed oil on the side plate can be far away from the smoke baffle and flows to the inside of the box body, the distance from any point on the bottom edge of the side plate to the rotating shaft is L, and the distance from any point on the bottom edge of the side plate to the smoke baffle is larger and larger.

In order to facilitate filtering and rectifying of oil smoke entering the box body, a filter screen is arranged at an air inlet at the bottom of the box body, when the smoke baffle is in an opening state of forward turning, the rear end of the baffle is positioned above the front end of the filter screen, and the rear end of the baffle and the projection of the front end of the filter screen on the horizontal plane are at least partially overlapped.

In order to bear larger oil smoke impact and further improve the oil smoke absorption effect, the left side and the right side of the smoke baffle are respectively provided with a side plate which acts along with the smoke baffle, and the smoke baffle is positioned in the space between the rear side of the smoke baffle and the side plates in the opened state of the smoke baffle, and a cage smoke area is formed below the baffle and the filter screen.

In order to collect condensed oil conveniently, an oil cup is arranged at the bottom of the rear side of the box body, the rear end of the filter screen is positioned above the oil cup, and the projection of the filter screen on the horizontal plane is positioned in the oil cup.

Preferably, in order to facilitate the condensed oil on the filter screen to flow into the oil cup, the filter screen is inclined downwards gradually from front to back, and an included angle between the filter screen and the horizontal plane is alpha and satisfies alpha >5 degrees.

Compared with the prior art, the invention has the advantages that: the baffle plate is arranged, so that the air inlet area at the bottom can be prevented from being increased steeply, excessive pressure relief of a fan system is avoided, the performance of the fan system is ensured, and the oil smoke absorption effect is further improved; a pressure stabilizing cavity is formed above the baffle plate to realize the uniformity of the flow velocity at the air inlet of the fan, a cage smoke cavity is formed below the baffle plate to improve the capability of bearing the impact of oil smoke, and the two cavities jointly realize the improvement of the effect of absorbing the oil smoke; in addition, the smoke baffle plate, the side plates and the baffle plate form a semi-closed inner cavity structure, the smoke baffle plate and the baffle plate simultaneously form a sound insulation surface for shielding noise, and noise reduction and oil smoke absorption improvement are realized; the baffle can also change the flow direction of the oil smoke and reduce the condensed oil on the smoke baffle; the change of the distance from the lower edge of the side plate to the rotating shaft of the smoke baffle ensures that the condensed oil can flow into the box body.

Drawings

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

fig. 2 is a sectional view (side view) of the range hood according to the embodiment of the present invention in a closed state;

fig. 3 is a schematic view of the range hood according to the embodiment of the present invention in an open state;

fig. 4 is a sectional view (perspective) of the range hood according to the embodiment of the present invention in an open state;

fig. 5 is a sectional view (side view) of the range hood according to the embodiment of the present invention in an open state;

fig. 6 is a sectional view (top view) of the range hood according to the embodiment of the present invention in an open state.

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 6, a thin range hood includes a box 1 and a fan system 2 disposed in the box 1. The fan system 2 has a fan inlet 21 facing the front.

The box 1 is cavity form, and its front side and bottom are all uncovered, and the bottom of box 1 forms air intake 11, and the top of box 1 is formed with fan system 2 complex air outlet 12, and air outlet 12 department is provided with out fan housing 5 for be connected fan system 2 with outside exhaust pipe.

The front side of the box body 1 is provided with a smoke baffle 3 which is matched with the open surface of the front side of the box body 1. The top of keeping off the cigarette board 3 and box 1 is passed through pivot 31 and is rotated and be connected on the top, and the pivot 31 of keeping off the cigarette board 3 extends in the left and right sides direction, and the upset that keeps off the cigarette board 3 around this pivot 31 realizes the airtight and open of box 1 front side. The smoke baffle 3 can be turned over by adopting the existing motion mechanism, such as the matching of an electric push rod, a motor and a hinge. The left side and the right side of the smoke baffle 3 are respectively provided with a side plate 32, the side plates 32 are preferably in a fan-wing shape with a small top and a big bottom, one straight edge of each side plate 32 is connected with one side of the smoke baffle 3 facing the inside of the box body 1, the other straight edge is a free edge, and the bottom edge of each side plate 32 is in an arc shape protruding downwards. From this, curb plate 32 can overturn along with the upset of keeping off cigarette board 3, and when keeping off cigarette board 3 and closing box 1 front side, curb plate 32 was accomodate in the left and right sides of box 1 inboard, and when keeping off cigarette board 3 and open box 1 front side, curb plate 32 overturns forward along with keeping off cigarette board 3 and at least part is located the left and right sides in box 1 the place ahead to curb plate 32 keeps the free limit throughout and does not surpass box 1 front side, thereby the oil smoke can be avoided escaping from the left and right sides to the setting of curb plate 32.

The air inlet 11 at the bottom of the box body 1 is provided with a filter screen 4, preferably, the filter screen can be a grid net, and the meshes are elongated holes extending in the front-back direction. An oil cup 6 is arranged at the bottom of the rear side of the box body 1, the rear end of the filter screen 4 is positioned above the oil cup 6, and the projection of the rear end of the filter screen on the horizontal plane is positioned in the oil cup 6. The filter screen 4 is gradually inclined downwards from front to back, and the included angle between the filter screen 4 and the horizontal plane is alpha, preferably alpha is larger than 5 degrees, so that condensed oil remained on the filter screen 4 can be guided backwards and finally enters the oil cup 6 to be collected.

Keep off cigarette board 3 and still be provided with baffle 7 towards one side in the box 1, when keeping off cigarette board 3 and be in the closed condition, baffle 7 is by preceding state of downward sloping gradually backward to baffle 7 is located the below of fan system 2. When the smoke baffle 3 is in an open state, the included angle between the smoke baffle 3 and the vertical surface is theta, preferably theta is more than or equal to 12 degrees and less than or equal to 45 degrees; the included angle between the baffle 7 and the horizontal plane is beta, and theta < beta is satisfied, so that the condensed oil on the baffle 7 is ensured to be far away from the smoke baffle 3 and flow into the box body 1, in this state, the rear end of the baffle 7 is positioned above the front end of the filter screen 4, and the projection of the rear end of the baffle 7 and the front end of the filter screen 4 on the horizontal plane is at least partially overlapped. The width of the baffle 7 in the front-rear direction is preferably 100mm to 250 mm.

Referring to fig. 4 and 6, since the baffle 7 is located below the fan system 2, it is ensured that the periphery of the fan system 2 is enclosed by the smoke barrier 3, the baffle 7, the side plate 32 and the box body 1 to form a pressure stabilizing area Q1, and the pressure stabilizing area Q1 is shown as an area enclosed by a dotted line in the figure. Under the state that the smoke baffle 3 is opened, the space in front of the fan air inlet 21 of the fan system 2 is greatly increased, and a large amount of air flow can enter from the left side and the right side of the fan system 2. The setting of baffle 7 has avoided fan system 2 excessive pressure release (the pressure release of avoiding the air inlet area to increase suddenly and bring) effectively, and fan system 2 can form more even negative pressure in the steady voltage district Q1 of box 1 and components such as cigarette board 2, guarantees the homogeneity of box 1 downside air intake 11 wind speed.

In the space between the side plates 32 and the rear side of the smoke barrier 3 in the opened state of the smoke barrier 3, a smoke trap Q2 is formed below the baffle 7 and the strainer 4, as shown in fig. 4, and this smoke trap Q2 is shown by the area enclosed by the chain line. The smoke trapping area Q2 can bear larger oil smoke impact, and the oil smoke absorption effect is further improved. Baffle 7 changes the oil smoke flow direction, reduces the contact of oil smoke and fender cigarette board 3, reduces the risk that 3 condensate oil of fender cigarette board drip.

Keep off cigarette board 3 and curb plate 32, baffle 7 and wrap up fan air intake 21 basically, especially keep off cigarette board 3 towards one side in the box 1, the ascending surface of baffle 7 constitutes the sound-proof face, plays the effect of separation to the noise of fan system 2, and the noise is let on the wall multiple reflection in the relative confined space in addition, great decay, noise when can reducing the use by a wide margin. Sound absorbing cotton can be arranged inside the noise reduction device to obtain better noise reduction effect.

Referring to fig. 2, a point on the arc-shaped edge of the lower end of the side plate 32 is spaced from the rotating shaft 31 by a distance L, and when the distance between the point and the smoke barrier 3 is larger, L is larger. As shown in fig. 5, namely L1< L2< L3, so as to ensure that the smoke barrier 3 is at any position, the condensed oil on the side plate 32 will flow away from the smoke barrier 3 to the inside of the box body 1.

Claims

1. The utility model provides a range hood, includes box (1) and sets up fan system (2) in box (1), fan system (2) have fan air intake (21) towards the front side, its characterized in that: the front side and the bottom of box (1) are all uncovered, the bottom of box (1) forms air intake (11), the front side of box (1) is provided with the cigarette board (3) that keeps off that can overturn relative to box (1), keep off cigarette board (3) and still be provided with baffle (7) towards one side in box (1), baffle (7) correspond the below of fan system (2).

2. The range hood of claim 1, wherein: keep off cigarette board (3) and rotate through pivot (31) on the top of top and box (1) and be connected, pivot (31) of keeping off cigarette board (3) extend in the left and right directions.

3. The range hood of claim 2, wherein: when the smoke baffle plate (3) is in a forward-overturning opening state, the included angle between the smoke baffle plate (3) and the vertical surface is theta, the included angle between the baffle plate (7) and the horizontal plane is beta, and theta < beta is met.

4. The range hood of claim 1, wherein: the left and right sides of keeping off cigarette board (3) is provided with curb plate (32) along with keeping off cigarette board (3) action respectively, works as keep off cigarette board (3) when being in the open mode of upset forward, curb plate (32) at least part is located the left and right sides in box (1) the place ahead to curb plate (32) keep away from one side of keeping off cigarette board (3) and do not surpass box (1) front side, keep off cigarette board (3), baffle (7), curb plate (32) and box (1) and enclose into voltage stabilizing area (Q1) jointly.

5. The range hood of claim 4, wherein: the side plate (32) is in a fan-shaped shape with a small upper part and a large lower part, one straight edge of the side plate (32) is connected with one side, facing the inside of the box body (1), of the smoke baffle plate (3), the other straight edge is a free edge, and the bottom edge of the side plate (32) is in an arc shape protruding downwards.

6. The range hood of claim 5, wherein: the distance from any point on the bottom edge of the side plate (32) to the rotating shaft (31) is L, and the L is larger when the distance from any point on the bottom edge of the side plate (32) to the smoke baffle plate (3) is larger.

7. The range hood of claim 1, wherein: air intake (11) department of box (1) bottom is provided with filter screen (4), works as when keeping off cigarette board (3) and being in the open mode of forward upset, the rear end of baffle (7) is located the top of the front end of filter screen (4), the projection of the rear end of baffle (7) and the front end of filter screen (4) on the horizontal plane is at least partly overlapped.

8. The range hood of claim 7, wherein: the left and right sides of keeping off cigarette board (3) is provided with curb plate (32) along with keeping off cigarette board (3) action respectively, under the state that keeps off cigarette board (3) and open, is located the space between rear side, curb plate (32) of keeping off cigarette board (3), the below of baffle (7) and filter screen (4) forms cage cigarette district (Q2).

9. The range hood of claim 7, wherein: an oil cup (6) is arranged at the bottom of the rear side of the box body (1), and the rear end of the filter screen (4) is positioned above the oil cup (6) and the projection of the rear end of the filter screen on the horizontal plane is positioned in the oil cup (6).

10. The range hood of claim 9, wherein: the filter screen (4) is from preceding backward slope down gradually, the contained angle between filter screen (4) and the horizontal plane is alpha to satisfy alpha > 5.