CN216790295U - Fume exhaust fan - Google Patents

Abstract

The utility model relates to a range hood, comprising: the front side of the shell is provided with an air inlet; the smoke baffle can open or close the air inlet; keep off the cigarette board including controlling first board and the second board of arranging side by side, the front side that keeps off the cigarette board is located with the mode that two adjacent inboard edges are close to or keep away from to first board and second board to at least, have first state and second state: in a first state, the first plate and the second plate move in opposite directions to enable adjacent side edges of the first plate and the second plate to be spliced and close the air inlet together; in the second state, the first plate and the second plate move back to form a gap between the adjacent inner side edges of the first plate and the second plate, so that a main air suction opening opposite to the air inlet is formed, at least one of the first plate and the second plate deflects in a direction away from the machine shell by taking the inner side edge or a straight line parallel to the inner side edge as a rotating axis, and an auxiliary air suction opening communicated with the air inlet is limited by the machine shell. This range hood can effectively avoid keeping off the cigarette board and appear sheltering from user's sight and interfering the problem with the pan.

Description

Fume exhaust fan

Technical Field

The utility model relates to the technical field of kitchen appliances, in particular to a range hood.

Background

The range hood is a kitchen appliance for purifying the kitchen environment. The existing range hood, especially the range hood, is usually realized by increasing the transverse dimension of a machine body or increasing the longitudinal dimension of a turnover smoke baffle plate in order to increase a smoke collecting area.

The application number is CN202020066610.2 (No. CN211822584U) discloses a range hood, including the casing and locate the fan system in this casing, it has the smoke inlet that is linked together with this smoke inlet to open on the preceding lateral wall of casing lower part to along the top edge of smoke inlet is provided with the cigarette board that keeps off that extends forward horizontally or aslope, thereby this cigarette board's front side position still has the extension board that can keep off the cigarette board and move around flexible relatively this cigarette board and change cigarette board width. The extension plate capable of stretching back and forth to change the width of the smoke baffle is arranged on the front side of the smoke baffle, and when the concentration of oil smoke is high, the extension plate extends out to increase the width of the smoke baffle so as to improve the smoke gathering effect and further improve the oil absorption effect; when the concentration of the oil smoke is small or the oil smoke is not used, the extension plate can be retracted, and the size of the whole machine and the size design of the smoke inlet are not influenced.

However, range hood in the above-mentioned patent still has certain not enough, and at first, the above-mentioned fender cigarette board that can overturn open around can exist and shelter from user's sight and the problem of interfering with the pan on the top of a kitchen range, especially, telescopic keeps off the cigarette board structure along with the increase of vertical size, and it shelters from the sight and interferes the problem with the pan more much, has seriously influenced user's use and has experienced. Secondly, the structure of the smoke baffle in the patent can increase the smoke collecting area in the front and back directions, so that the smoke collecting effect is improved to a certain degree, but the phenomenon that the oil smoke escapes from the left side and the right side of the range hood still exists.

Therefore, the existing range hood needs to be further improved.

SUMMERY OF THE UTILITY MODEL

The first technical problem to be solved by the utility model is to provide a range hood which can effectively avoid the problems that the smoke baffle plate shields the sight of a user and interferes with a cooker, aiming at the current situation of the prior art.

The second technical problem to be solved by the utility model is to provide a range hood which can effectively reduce the oil smoke escaping phenomenon on the left side and the right side of the range hood aiming at the current situation of the prior art.

The technical solution adopted by the present invention to solve any one of the first technical problem and the second technical problem is: a range hood, comprising:

the front side of the shell is provided with an air inlet;

the smoke baffle is arranged on the front side of the shell and can open or close the air inlet;

keep off the cigarette board including controlling first board and the second board of arranging side by side, first board and second board have adjacent inboard limit and the outside limit of keeping away from mutually, first board and second board are located with the mode that both adjacent inboard limits are close to or keep away from the front side of keeping off the cigarette board to at least, have first state and second state:

in the first state, the first plate and the second plate move in opposite directions to enable adjacent side edges of the first plate and the second plate to be spliced, and the air inlet is closed together;

in the second state, the first plate and the second plate move back to form a gap between the adjacent inner side edges of the first plate and the second plate, so that a main air suction opening opposite to the air inlet is formed, and at least one of the first plate and the second plate deflects towards a direction far away from the machine shell by taking the inner side edge or a straight line parallel to the inner side edge as a rotation axis, so that an auxiliary air suction opening communicated with the air inlet is defined by the first plate and the second plate and the machine shell.

In order to realize the skew of first board and second board, still include and keep off cigarette board motion, this keeps off cigarette board motion includes:

the connecting rod assembly comprises a first rod and a second rod which are arranged at intervals in the left-right direction, the first end of the first rod and the first end of the second rod are hinged to the back of the first plate or the back of the second plate, and the second end of the first rod and the second end of the second rod are hinged to the shell;

and the power output end of the driving piece is in transmission connection with at least one of the first rod and the second rod, so that the connecting rod assembly is driven to rotate.

In order to simplify the structure of the smoke baffle movement mechanism, reduce the number of corresponding parts, avoid blocking up in the air inlet of the casing, influence the air inlet smoothness, the connecting rod assemblies have two groups, respectively with the first plate correspond with the second plate, these two groups of connecting rod assemblies are driven by the same driving piece.

In order to drive the first plate and the second plate to synchronously move by the same driving part, the driving device further comprises a transmission rod which extends along the left-right direction, a first bevel gear is coaxially connected to the first end and the second end of the transmission rod, the second ends of the first rods of the two connecting rod assemblies are connected to the shell through rotating shafts, second bevel gears are coaxially connected to the two rotating shafts, the first bevel gears at the two ends of the transmission rod are respectively meshed with the two second bevel gears, the driving part is a motor, and an output shaft of the motor is in transmission connection with the transmission rod so as to drive the transmission rod to rotate around the axis of the driving rod.

In order to ensure the oil fume suction effect of the auxiliary air suction opening, the opening angles of the first plate and the second plate need to be reasonably designed, the included angle formed by the first plate or the second plate and the shell in the opening state is alpha, and alpha is more than or equal to 10 degrees and less than or equal to 40 degrees.

The front side wall of the casing may be inclined downward from front to back, or may be arranged to extend vertically, preferably, the front side wall of the casing is arranged to extend vertically, and the air inlet is provided on the front side wall of the casing.

In order to further reduce the escape of the oil smoke at the left side and the right side, the projection of the outer side edge of the first plate or the second plate on the left-right extending vertical plane in the opening state is positioned outside the projection of the front side wall of the machine shell on the left-right extending vertical plane.

In order to realize the flow guide of the oil smoke entering from the auxiliary air suction opening, a flow guide inclined plane protruding towards the air inlet of the machine shell is limited on the back surface of the first plate and/or the back surface of the second plate.

In order to improve the flow guiding effect and ensure the smoothness of oil smoke flow, the highest area of the flow guiding inclined plane of the first plate and the highest area of the flow guiding inclined plane of the second plate are both adjacent to the inner side edges of the first plate and the second plate.

In order to enable the air inlet to be arranged at the lower part as far as possible, the air inlet is sufficiently close to a smoke source, and the smoke suction effect is improved, the oil smoke suction machine shell comprises a fan frame and a smoke inlet cavity body which vertically extends, the smoke inlet cavity body is arranged at the rear side of the bottom of the fan frame, and the air inlet is formed in the front side wall of the smoke inlet cavity body.

Compared with the prior art, the utility model has the advantages that:

1. when the first plate and the second plate are opened, the first plate and the second plate are respectively far away from the left side and the right side, and the adjacent inner side edges of the first plate and the second plate are used as rotating axes to deflect in the direction far away from the machine shell, so that the problem of shielding a user line of sight or interference with a cooker cannot occur.

2. The first plate and the second plate deflect forwards to enable the negative pressure area to move forwards, and on the other hand, the first plate and the second plate can limit auxiliary air suction openings at the left side and the right side of the shell, so that oil smoke is prevented from escaping at the left side and the right side, and the oil smoke absorption effect is effectively improved.

3. In the preferred scheme, the first plate and the second plate are opened to increase the smoke gathering area, so that the smoke gathering effect of the left side and the right side of the range hood is enhanced.

Drawings

Fig. 1 is a schematic perspective view of a range hood according to an embodiment of the present invention (the first plate and the second plate are both in an open state);

fig. 2 is a schematic perspective view of a range hood according to an embodiment of the present invention (the first plate and the second plate are both in a closed state);

FIG. 3 is a front view of FIG. 1;

FIG. 4 is a left side view of FIG. 1;

fig. 5 is a cross-sectional view taken at a-a in fig. 4.

Detailed Description

The utility model is described in further detail below with reference to the accompanying examples.

Directional terms such as "front," "rear," "upper," "lower," "left," "right," "side," "top," "bottom," and the like are used in the description and claims of the present invention to describe various example structural portions and elements of the utility model, but are used herein for convenience of description only and are to be determined based on the example orientations shown in the drawings. Because the disclosed embodiments of the present invention may be oriented in different directions, the directional terms are used for descriptive purposes and are not to be construed as limiting, e.g., "upper" and "lower" are not necessarily limited to directions opposite to or coincident with the direction of gravity.

Referring to fig. 1-5, a range hood includes a housing 10, a fan system, a smoke barrier, and a smoke barrier movement mechanism. The casing 10 includes a fan frame 11 and a smoke inlet cavity 12, and the smoke inlet cavity 12 is disposed at the bottom of the fan frame 11. A fan system (not shown) is provided in the fan frame 11 for providing a negative pressure. An air inlet 13 is arranged on the front side wall of the smoke inlet cavity 12. The smoke baffle is arranged at the front side of the smoke inlet cavity 12 and can open or close the air inlet 13 under the driving of the smoke baffle movement mechanism.

Referring to fig. 1, the air inlet 13 of the present embodiment is a strip-shaped opening extending left and right, and correspondingly, the smoke barrier is also a strip-shaped plate. Specifically, the smoke barrier of the present embodiment comprises a first plate 21 and a second plate 22 arranged side by side in the left-right direction, wherein the first plate 21 and the second plate 22 have adjacent inner sides 211,221 and remote outer sides 212, 222. Specifically, the first plate 21 and the second plate 22 are disposed on the front side of the smoke barrier in such a manner that the adjacent inner side edges 211,221 are close to or far from each other, and have at least a first state and a second state: in the first state, the first plate 21 and the second plate 22 move toward each other to splice the adjacent side edges of the two, and close the air inlet 13 together, as shown in fig. 2 in detail; in the second state, the first plate 21 and the second plate 22 move away from each other to form a gap between the adjacent inner side edges 211,221 thereof, so as to form the main air suction opening 14 opposite to the air inlet 13, and at least one of the first plate 21 and the second plate 22 is deflected in a direction away from the housing 10 by taking the inner side edge 211,221 thereof or a straight line parallel thereto as a rotation axis, so as to define an auxiliary air suction opening 15a,15b communicating with the air inlet 13 with the housing 10, as shown in detail in fig. 1.

Referring to fig. 5, the front side wall of the smoke inlet chamber 12 is vertically extended, and the angle formed between the first plate 21 or the second plate 22 and the casing 10 (i.e. the front side wall of the smoke inlet chamber) in the open state is α, which is greater than or equal to 10 ° and less than or equal to 40 °, and preferably is 30 °.

Referring to fig. 4 and 5, in the present embodiment, a flow guiding inclined plane 213,223 protruding toward the air inlet 13 of the housing 10 is defined on both the back surface of the first plate 21 and the back surface of the second plate 22, that is, the back surface of the first plate 21 and the back surface of the second plate 22 have an inclined plane or a curved surface structure with a high middle part and a low periphery as the flow guiding inclined plane 213,223, and the flow guiding inclined plane 213,223 is disposed to effectively guide the oil smoke entering from the auxiliary air suction openings 15a and 15b, so that the oil smoke escaping from the outer peripheral edge of the first plate 21 or the second plate 22 quickly enters the auxiliary air suction openings 15a and 15 b. Further, in order to improve the flow guiding effect and ensure the smoothness of the lampblack flowing, the highest area of the flow guiding inclined surface 213,223 of the first plate 21 is adjacent to the inner side edges 211 and 221 of the first plate 21, and the highest area of the flow guiding inclined surface 213,223 of the second plate 22 is adjacent to the inner side edges 211 and 221 of the second plate 22.

As can be seen from fig. 3, when the first plate 21 and the second plate 22 are in the open state, the projections of the outer sides 212 and 222 of the first plate and the second plate are located outside the projection of the front side wall of the casing 10 on the left and right extending vertical planes, so as to increase the smoke collection area, enhance the smoke collection effect on the left and right sides of the range hood, and further reduce the escape of the oil smoke on the left and right sides.

The smoke barrier movement mechanism comprises a linkage assembly 30, a driving member 34, a transmission shaft, first bevel gears 36a,36b and second bevel gears 37a,37 b.

Referring to fig. 5, two sets of link assemblies 30 are provided, corresponding to the first plate 21 and the second plate 22, respectively. Each link assembly 30 includes a first rod 31a,31b and a second rod 32a,32b arranged at a distance in the left-right direction, wherein a first end of the first rod 31a,31b and a first end of the second rod 32a,32b are hinged to the back of the first plate 21 or the second plate 22, and a second end of the first rod 31a,31b and a second end of the second rod 32a,32b are hinged to the inner wall of the smoke intake chamber 12, whereby the first plate 21 (or the second plate 22), the first rod 31a,31b, the second rod 32a,32b and the part of the smoke intake chamber 12 constitute a four-link mechanism.

The transmission rod 35 is disposed in the smoke inlet cavity 12 and extends in the left-right direction. The driving member 34 of this embodiment is a motor, an output shaft of the motor is coaxially connected with a first gear 38, a middle portion of the transmission rod 35 is coaxially connected with a second gear 39, the first gear 38 is meshed with the second gear 39, and when the motor rotates, the transmission rod 35 can be driven to rotate around its axis. Specifically, the motor of the present embodiment is a motor capable of rotating in forward and reverse directions. The first end and the second end of the transmission rod 35 are coaxially connected with first bevel gears 36a,36b, the first rods 31a,31b of the two connecting rod assemblies 30 are adjacent and are hinged on the inner wall of the smoke inlet cavity 12 through rotating shafts 33a,33b, wherein the two rotating shafts 33a,33b are coaxially connected with second bevel gears 37a,37b, and the first bevel gears 36a,36b at the two ends of the transmission rod 35 are respectively meshed with the two second bevel gears 37a,37 b. When the motor operates, the transmission rod 35 can transmit the torque to the link assemblies 30 on the left and right sides at the same time, thereby realizing the synchronous deflection of the first plate 21 and the second plate 22.

The longitudinal dimension (that is, the front-back direction) of the blower frame 11 of this embodiment is greater than the longitudinal dimension of the smoke inlet cavity 12, and the smoke inlet cavity 12 is a cavity structure arranged to extend vertically, and specifically, the smoke inlet cavity 12 is connected to the rear side of the bottom of the blower frame 11.

On the basis of the above embodiments, other embodiments can be obtained by replacing and improving the related technical features. For example, the deflection of the first plate 21 and the second plate 22 may be independently controlled by two smoke barrier motion mechanisms. For another example, the front side wall of the smoke inlet cavity 12 is not limited to the vertically extending arrangement, and the front side wall of the smoke inlet cavity 12 may also be inclined from front to back, that is, this embodiment may also be applied to the side-suction range hood.

Claims (10)

1. A range hood, comprising:

a casing (10) having an air inlet (13) at a front side thereof;

the smoke baffle plate is arranged on the front side of the shell (10) and can open or close the air inlet (13);

the method is characterized in that: the smoke baffle comprises a first plate (21) and a second plate (22) which are arranged side by side from left to right, the first plate (21) and the second plate (22) are provided with adjacent inner side edges (211,221) and far away outer side edges (212,222), the first plate (21) and the second plate (22) are arranged on the front side of the smoke baffle in a mode that the adjacent inner side edges (211,221) are close to or far away from each other, and at least have a first state and a second state:

in the first state, the first plate (21) and the second plate (22) move oppositely to enable adjacent side edges of the first plate and the second plate to be spliced and close the air inlet (13) together;

in the second state, the first plate (21) and the second plate (22) move away from each other to form a gap between the adjacent inner side edges (211,221) of the first plate and the second plate, so that a main air suction opening (14) opposite to the air inlet (13) is formed, and at least one of the first plate (21) and the second plate (22) deflects towards the direction away from the machine shell (10) by taking the inner side edge (211,221) or a straight line parallel to the inner side edge as a rotation axis, so that an auxiliary air suction opening (15a,15b) communicated with the air inlet (13) is defined by the machine shell (10).

2. The range hood of claim 1, wherein: still include the fender cigarette board motion, this fender cigarette board motion includes:

a link assembly (30) including first and second rods (31a,31b, 32a,32b) arranged at intervals in a left-right direction, a first end of the first rod (31a,31b) and a first end of the second rod (32a,32b) are both hinged to a back surface of the first or second plate (21, 22), and a second end of the first rod (31a,31b) and a second end of the second rod (32a,32b) are both hinged to the cabinet (10);

and the power output end of the driving piece (34) is in transmission connection with at least one of the first rod (31a,31b) and the second rod (32a,32b), so that the connecting rod assembly (30) is driven to rotate.

3. The range hood of claim 2, wherein: two groups of connecting rod assemblies (30) are respectively corresponding to the first plate (21) and the second plate (22), and the two groups of connecting rod assemblies (30) are driven by the same driving piece (34).

4. The range hood of claim 3, wherein: the transmission mechanism is characterized by further comprising a transmission rod (35) extending in the left-right direction, first bevel gears (36a,36b) are coaxially connected to a first end and a second end of the transmission rod (35), second ends of first rods (31a,31b) of the two connecting rod assemblies (30) are connected to the machine shell (10) through rotating shafts (33a,33b), second bevel gears (37a,37b) are coaxially connected to the two rotating shafts (33a,33b), the first bevel gears (36a,36b) at the two ends of the transmission rod (35) are respectively meshed with the two second bevel gears (37a,37b), the driving piece (34) is a motor, and an output shaft of the motor is in transmission connection with the transmission rod (35) so as to drive the transmission rod (35) to rotate around the axis of the driving piece.

5. The range hood according to any one of claims 1 to 4, wherein: the first plate (21) or the second plate (22) forms an included angle alpha with the machine shell (10) in an opening state, and the included angle alpha is more than or equal to 10 degrees and less than or equal to 40 degrees.

6. The range hood according to any one of claims 1 to 4, wherein: the front side wall of the machine shell (10) is arranged in a vertically extending mode, and the air inlet (13) is formed in the front side wall of the machine shell (10).

7. The range hood according to any one of claims 1 to 4, wherein: the projection of the outer side edges (212,222) of the first plate (21) or the second plate (22) in the opened state on a left-right extending vertical plane is positioned outside the projection of the front side wall of the machine shell (10) on the left-right extending vertical plane.

8. The range hood according to any one of claims 1 to 4, wherein: a diversion inclined plane (213,223) which is formed by protruding towards the air inlet (13) of the machine shell (10) is defined on the back of the first plate (21) and/or the back of the second plate (22).

9. The range hood of claim 8, wherein: the uppermost region of the diversion chamfer (213,223) of the first plate (21) and the uppermost region of the diversion chamfer (213,223) of the second plate (22) are adjacent to the respective inner side edges (211, 221).

10. The range hood according to any one of claims 1 to 4, wherein: casing (10) include fan frame and vertical extension advance cigarette cavity (12), advance cigarette cavity (12) and locate the bottom rear side of fan frame (11), advance and seted up on the preceding lateral wall of cigarette cavity (12) air intake (13).

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