CN216307896U - Fume exhaust fan - Google Patents

Abstract

The utility model discloses a range hood, which comprises a fume collecting hood, wherein an opening is formed in the bottom of the fume collecting hood, a fume baffle plate capable of opening and closing the opening in a turnover manner is arranged at the opening, and the range hood is characterized in that: the opening is divided into a main air inlet positioned at the rear side of the smoke baffle and an auxiliary air inlet positioned at the front side of the smoke baffle in the opening state of the smoke baffle. Compared with the prior art, the utility model has the advantages that: the opening at the bottom of the smoke collecting hood is divided into a main air inlet and an auxiliary air inlet, so that oil smoke enters from the main air inlet, clean air enters from the auxiliary air inlet, and airflow entering through the auxiliary air inlet forms a gas isolation zone to prevent the oil smoke from contacting with the front side surface of the smoke collecting hood, thereby preventing the oil smoke from condensing on the front side of the smoke collecting hood, and the smoke collecting hood is particularly suitable for a range hood with a horizontal bottom of the smoke collecting hood.

Description

Fume exhaust fan

Technical Field

The utility model relates to an oil fume purification device, in particular to a range hood.

Background

The range hood has become one of indispensable kitchen household electrical appliances in modern families, and the range hood generally comprises a top suction type range hood and a side suction type range hood, and the top suction type range hood has more and more extensive application due to the advantages of neatness, lightness, small occupied space and the like. The top-suction type range hood generally includes a fume collecting hood, a fan housing located on the fume collecting hood, and a volute, an impeller, and a motor for driving the impeller are installed in the fan housing.

The existing range hood, such as the range hood disclosed in chinese patent with application number 202022289222.3, includes a fume collecting hood, the fume collecting hood includes a first side plate, an air inlet is opened on the first side plate, the air inlet is communicated with a fume collecting cavity provided by the fume collecting hood; the lampblack absorber is including holding together the cigarette panel, and the one end pin joint of holding together the cigarette panel is in first curb plate to laminate with the surface of first curb plate, so that hold together and form opening cigarette space down between cigarette panel and the first curb plate.

The head collision problem of the top-suction type range hood becomes a market pain point, and in order to solve the pain point, more and more range hoods begin to shorten a smoke collecting hood or a similar smoke collecting cavity device, so that the smoke collecting hood or the similar smoke collecting cavity device is consistent with the depth of a cabinet as far as possible, on one hand, the range hood is matched beautifully, and on the other hand, the head collision problem can be thoroughly solved. However, the oil smoke is more easily contacted with the inner inclined plane at the front side of the smoke collection cavity in the rising process by the measure, so that the oil stain is condensed and gathered on the oil smoke, and the oil smoke flows downwards and drops on the cooking bench after a long time.

When the collection smoke chamber did not shorten, only a small amount of oil smoke can contact collection smoke chamber front side after the oil smoke rises, but behind the collection smoke chamber shortening, collection smoke chamber front side is close to directly over the smoke source more, has a large amount of cigarettes and gathers condensation on the front side inclined plane and finally forms the oil droplet.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to provide a range hood aiming at the defects of the prior art, which can prevent oil smoke from condensing on the front side surface of the inner side of the smoke collecting hood, thereby avoiding oil dripping in the inner cavity of the smoke collecting hood.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a range hood, includes the collection petticoat pipe, the opening has been seted up to the bottom of collection petticoat pipe, the opening part is provided with can overturn and open and close open-ended and keep off cigarette board, its characterized in that: the opening is divided into a main air inlet positioned at the rear side of the smoke baffle and an auxiliary air inlet positioned at the front side of the smoke baffle in the opening state of the smoke baffle.

In order to avoid unsmooth air inlet, a gas isolation belt cannot be formed, meanwhile, the secondary air inlet cannot be too large, so that too much flow distribution is caused, and the product fineness is influenced, the minimum gap between the opening state and the front edge of the opening of the smoke baffle is D2, and the requirement that the D2 is not less than 10mm is not more than 30mm is met.

In order to filter the oil smoke conveniently, a filter screen is arranged above the opening in the smoke collecting hood, the filter screen is gradually inclined downwards from front to back, and meshes are formed in the filter screen.

In order to prevent oil smoke from condensing on the smoke baffle plate when the oil smoke skips over the top end of the smoke baffle plate, the top end of the smoke baffle plate in an open state is positioned in front of the foremost end of the meshes of the filter screen, and the horizontal gap between the top end of the smoke baffle plate in the open state and the foremost end of the meshes of the filter screen is D1 and meets the requirement that D1 is larger than or equal to 10 mm.

Preferably, for the guide oil smoke, the bottom that the collection petticoat pipe is located the open-ended front side is provided with the bottom plate, be provided with the baffle between the front end of filter screen and the rear end of bottom plate, the baffle slopes forward gradually from top to bottom.

In order to ensure that a flow field is smooth and reduce fluid separation or collision, the included angle between the baffle and the horizontal plane is alpha 1, the included angle between the smoke baffle and the horizontal plane is alpha 2 in an opening state, and the difference between alpha 1 and alpha 2 is not more than 10 degrees.

For the convenience of separating the opening by the smoke baffle, preferably, the smoke baffle is rotatably connected with the smoke collecting hood through a rotating shaft extending in the left-right direction, and the rotating shaft is positioned behind the front edge of the opening.

Preferably, for the convenience of setting up the pivot, the collection petticoat pipe is provided with the pivot seat in the left and right sides of opening part, it is fixed to keep off the cigarette board and be connected with the pivot, the pivot is connected with the rotation of pivot seat.

Preferably, in order to close the opening, the rotating shaft divides the smoke baffle into two parts respectively corresponding to the main air inlet and the auxiliary air inlet.

Compared with the prior art, the utility model has the advantages that: the opening at the bottom of the smoke collecting hood is divided into a main air inlet and an auxiliary air inlet, so that oil smoke enters from the main air inlet, clean air enters from the auxiliary air inlet, and airflow entering through the auxiliary air inlet forms a gas isolation zone to prevent the oil smoke from contacting with the front side surface of the smoke collecting hood, thereby preventing the oil smoke from condensing on the front side of the smoke collecting hood, and the smoke collecting hood is particularly suitable for a range hood with a horizontal bottom of the smoke collecting hood.

Drawings

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

FIG. 2 is a cross-sectional side view of the range hood of FIG. 1 (hidden blower housing);

fig. 3 is a schematic view of a range hood according to an embodiment of the present invention in a closed 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 3, a range hood is a ceiling range hood, and includes a fume collecting hood 1 and a fan frame 2 disposed above the fume collecting hood 1, and the fan frame 2 is used for installing a fan system therein.

The bottom of the fume collecting hood 1 is horizontal, an opening 11 is formed in the bottom of the fume collecting hood 1, and a bottom plate 12 is arranged on the front side, located at the opening 11, of the bottom of the fume collecting hood 1. The opening 11 is provided with a smoke barrier 3, and the smoke barrier 3 can open and close the opening 11 in a turnover manner.

The left and right sides of the smoke collecting cover 1 at the opening 11 is provided with a rotating shaft seat 13, the smoke blocking plate 3 is rotatably connected with the rotating shaft seat 13 of the smoke collecting cover 1 through a rotating shaft 31, and the smoke blocking plate 3 is fixedly connected with the rotating shaft 31 and can rotate along with the rotation of the rotating shaft 31. The rotation shaft 31 extends in the left-right direction, and the smoke barrier 3 can be automatically driven to rotate by a driving mechanism (not shown), such as a motor, or the smoke barrier 3 can be manually rotated.

The rotary shaft 31 is disposed rearward of the front edge of the opening 11, whereby when the smoke barrier 3 is opened, the smoke barrier 3 partitions the opening 11 into a main intake port 111 at the rear side of the rotary shaft 31 and a sub-intake port 112 at the front side of the rotary shaft 31. When the rotating shaft 31 is flush with the bottom of the smoke collecting hood 1, the rotating shaft 31 partitions the opening 11. When the smoke barrier 3 is closed, the parts of the smoke barrier 3 located at both sides of the rotating shaft 31 respectively close the corresponding primary air inlet 111 and secondary air inlet 112.

The filter screen 4 is arranged above the opening 11 in the smoke collecting cover 1, preferably, the filter screen 4 can be a grid net, and the filter screen 4 is obliquely arranged and gradually inclines downwards from front to back. The screen 4 is provided with mesh openings 41, preferably, the mesh openings 41 extend from the front to the back, although other types of mesh openings 41 are possible in the prior art. A baffle plate 14 is arranged between the front end of the filter screen 4 and the rear end of the bottom plate 12 to guide the oil smoke to pass through the filter screen 4, and the baffle plate 14 inclines forwards from top to bottom gradually.

In the prior range hood with the smoke baffle, the smoke baffle is usually moved to the direction far away from the air inlet after being opened. In this case, the air inlet is opposite to the cooking range, and the air inlet source is gas right below the range hood. In this application, through the pivot rearward movement that will keep off cigarette board 3, make and keep off cigarette board 3 and open the back, keep off and have certain clearance between cigarette board 3 front side and the baffle 14 of collection petticoat pipe 1. The air inlet is separated into two parts by the smoke baffle 3, and the main air inlet 111 is opposite to the cooking range and is used for sucking away the oil smoke rising from the lower part; the secondary air inlet 112 is aligned with the clean air outside, and the fresh air outside is sucked through the narrow slit during the operation process to form a gas isolation zone, so that the air with the oil smoke is isolated from the baffle plate 14 of the smoke collecting cover 1, and the oil smoke is prevented from condensing on the baffle plate 14. The paths of the oil smoke and the air flow are shown by arrows in fig. 2.

After the smoke baffle 3 is opened, the minimum clearance D2 between the smoke baffle and the bottom plate 12 (the front edge of the opening 11) of the smoke collecting hood 1 cannot be too small, which can cause unsmooth air inlet and cannot form a gas isolation zone; and the size of the flow distribution device cannot be too large, otherwise, too much flow distribution can be caused, and the product fineness is influenced. Therefore, the preferred interval of D2 is 10 mm. ltoreq.D 2. ltoreq.30 mm. The top end of the smoke baffle 3 is located at the junction of the main air inlet 111 and the auxiliary air inlet 112, so as to avoid the oil smoke from condensing on the smoke baffle 3 when passing through the junction, the foremost end of the mesh 41 on the filter screen 4 needs to be located behind the top end of the smoke baffle 3, and the horizontal gap D1 between the two end parts meets the requirement that D1 is larger than or equal to 10 mm.

The rising oil smoke moves upwards parallel to the inclined plane of the smoke baffle plate 3 under the guidance of the smoke baffle plate 3, in order to ensure smooth flow field and reduce fluid separation or collision, the size of the included angle alpha 1 between the baffle plate 14 of the smoke collecting hood 1 and the horizontal plane and the included angle alpha 2 between the opened smoke baffle plate 3 and the horizontal plane should be as close as possible, and the preferred range is that the difference value of the two is not more than 10 degrees.

Claims (9)

1. The utility model provides a range hood, includes collection petticoat pipe (1), opening (11) have been seted up to the bottom of collection petticoat pipe (1), opening (11) department is provided with and opens and close cigarette board (3) that keep off of opening (11) with can overturning, its characterized in that: the opening (11) is divided into a main air inlet (111) positioned at the rear side of the smoke baffle plate (3) and an auxiliary air inlet (112) positioned at the front side of the smoke baffle plate (3) in the opening state of the smoke baffle plate (3).

2. The range hood of claim 1, wherein: the minimum clearance between the opening state of the smoke baffle plate (3) and the front edge of the opening (11) is D2, and the requirement that D2 is more than or equal to 10mm and less than or equal to 30mm is met.

3. The range hood of claim 1, wherein: the upper portion that lies in opening (11) in collection petticoat pipe (1) is provided with filter screen (4), filter screen (4) by preceding downward sloping gradually backward, mesh (41) have been seted up in filter screen (4).

4. The range hood of claim 3, wherein: the top end of the smoke baffle (3) in the opening state is positioned in front of the foremost end of the mesh (41) of the filter screen (4), and the horizontal gap between the top end of the smoke baffle (3) in the opening state and the foremost end of the mesh (41) of the filter screen (4) is D1 and D1 is more than or equal to 10 mm.

5. The range hood of claim 3, wherein: the bottom of collection petticoat pipe (1) is located the front side of opening (11) and is provided with bottom plate (12), be provided with baffle (14) between the front end of filter screen (4) and the rear end of bottom plate (12), baffle (14) from top to bottom incline forward gradually.

6. The range hood of claim 5, wherein: the included angle between the baffle (14) and the horizontal plane is alpha 1, the included angle between the smoke baffle (3) and the horizontal plane in the opening state is alpha 2, and the difference between alpha 1 and alpha 2 is not more than 10 degrees.

7. The range hood according to any one of claims 1 to 6, wherein: keep off cigarette board (3) and rotate with collection petticoat pipe (1) through pivot (31) that extend in the left and right sides direction and be connected, pivot (31) are located the rear at opening (11) front edge.

8. The range hood of claim 7, wherein: the left and right sides of collection petticoat pipe (1) department at opening (11) is provided with pivot seat (13), it is fixed to keep off cigarette board (3) and pivot (31) connection, pivot (31) are connected with pivot seat (13) rotation.

9. The range hood of claim 7, wherein: the rotating shaft (31) divides the smoke baffle plate (3) into two parts which respectively correspond to the main air inlet (111) and the auxiliary air inlet (112).

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