CN216521888U - Cooking fume exhauster - Google Patents

Abstract

The utility model relates to a range hood, comprising: the fan system is arranged in the shell, the lower part of the shell is provided with a smoke inlet cavity, and the front side wall of the smoke inlet cavity is provided with a first air inlet; the guide plate is arranged on the front side of the smoke inlet cavity in a deflection way by taking a straight line on which the lower side edge of the guide plate is positioned or a parallel line adjacent to the straight line as a rotation axis, and has a folding state covering the front side wall of the smoke inlet cavity and an opening state which deflects forwards relative to the smoke inlet cavity and inclines forwards from bottom to top; when the guide plate is in a folded state, at least part of the first air inlet is positioned on the guide plate. When the range hood works, the guide plate can be inclined forwards from top to bottom and opened, under the wall attachment effect (coanda effect), oil smoke can flow forwards and upwards along the guide plate and finally enters the first air inlet, and due to the design of the guide plate, the oil smoke is reduced and is easily influenced by left and right cross winds, and the oil smoke escape condition is avoided.

Description

Cooking fume exhauster

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, wherein the common range hood and the near-suction range hood are widely used. In order to ensure the smoking effect, the front and back width sizes of the smoke baffle of the top-suction range hood are too large and generally protrude out of the cabinet, so that the head of a user is easy to collide with the smoke baffle in the using process. In addition, the ceiling type range hood has a high hanging height (a high smoke inlet), oil smoke is easily influenced by cross wind and is easy to escape, and the ceiling type range hood is far away from a smoke source and cannot suck away the oil smoke in time, so that the smoke suction effect is poor. The hanging height of the near-suction range hood is relatively low, a user easily collides with the range hood when a frying pan is turned over and fried in the using process, the user experience is poor, the size of the near-suction range hood is too large, the lower end occupies more kitchen space, the kitchen is inconvenient to clean, the oil smoke is easy to diffuse forwards, the phenomenon of positive escape of the range hood is avoided, and the smoke suction effect is poor.

Therefore, the chinese patent with application number CN202010031341.0 (No. CN111006291B) discloses a range hood, which includes a housing and a fan system disposed in the housing, wherein the lower portion of the housing has a vertically extending smoke inlet cavity, a smoke inlet communicated with the smoke inlet cavity is formed on the front side wall and/or the bottom wall of the lower portion of the housing, a smoke collecting cavity communicated with the smoke inlet cavity is formed on the upper portion of the housing, the smoke collecting cavity extends forward to form a mounting cavity for mounting the fan system, and an upper air suction opening communicated with the mounting cavity is formed on the housing corresponding to the bottom of the mounting cavity.

The range hood in the above patent still has certain not enough, at first, because this range hood's fender cigarette board inclines forward from top to bottom and overturns the opening, keeps off the cigarette board after opening, and the oil smoke that its lower part held together the cigarette district is influenced by horizontal wind and appears the oil smoke escape phenomenon easily. Secondly, although this range hood makes into the smoke inlet through the thin smoke inlet chamber of downwardly extending and leans on the setting, is closer to the flue gas source, still need set up the fender cigarette board that opens of overturning from bottom to top forward and improve the oil absorption cigarette effect, because smoke inlet chamber leans on the setting, and is close to the top of a kitchen range, so have and keep off the cigarette board and overturn and open the in-process and interfere the problem with the pan (especially the high pot) on the top of a kitchen range, also block user's culinary art field of vision easily, influenced user's use experience.

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 reduce the influence of cross wind on the left side and the right side and avoid the problem of oil smoke escape, 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 ensure the fume suction effect by arranging the fume inlet below and avoid the interference problem with the upper cooker of the cooking bench, aiming at the current situation of the prior art.

The technical scheme adopted by the utility model for solving any one of the first technical problem and the second technical problem is as follows: a range hood, comprising:

the fan system is arranged in the shell, the lower part of the shell is provided with a smoke inlet cavity, and the front side wall of the smoke inlet cavity is provided with a first air inlet;

the guide plate is arranged on the front side of the smoke inlet cavity in a deflection way by taking a straight line on which the lower side edge of the guide plate is positioned or a parallel line adjacent to the straight line as a rotation axis, and has a folding state covering the front side wall of the smoke inlet cavity and an opening state which deflects forwards relative to the smoke inlet cavity and inclines forwards from bottom to top;

when the guide plate is in a folded state, at least part of the first air inlet is positioned on the guide plate.

The guide plate can be rotated by manual operation and open and shut, also can be driven by actuating mechanism and the automatic rotation is opened and shut, in order to realize the automatic opening and shutting of guide plate, still include:

the driving mechanism is arranged on the smoke inlet cavity, and the power output end of the driving mechanism is connected with the guide plate, so that the guide plate is driven to rotate back and forth relative to the smoke inlet cavity.

Actuating mechanism can adopt by various prior art such as motor drive's connecting rod transmission assembly, gear drive subassembly, for the convenience set up in advancing the cigarette cavity and with deflector adaptation, actuating mechanism includes:

the driving motor is arranged in the smoke inlet cavity;

the connecting rod transmission assembly comprises a first connecting rod, a second connecting rod and a third connecting rod, wherein the first end of the first connecting rod is connected with the output shaft of the driving motor and can deflect under the driving of the output shaft of the driving motor, the second end of the first connecting rod is connected with the first end of the second connecting rod, the second end of the second connecting rod is hinged with the first end of the third connecting rod, and the third connecting rod is connected with the inner wall of the guide plate.

In order to ensure the stability of the rotation process of the guide plate, two driving mechanisms are arranged and are respectively arranged on the left side and the right side of the smoke inlet cavity.

In order to provide enough negative pressure to ensure that the smoke delivered by the guide plate can rapidly enter the first air inlet along the outer wall surface of the guide plate, the first air inlet extends along the left and right direction of the smoke inlet cavity, and at least part of the first air inlet is positioned on the guide plate when the guide plate is in a folding state. The first air inlet is arranged relatively close to the upper side, so that the flow trend of smoke can be better complied with, the smoke enters the first air inlet when leaving the upper side edge of the guide plate, and the problem of oil smoke escape is reduced.

As an improvement, the front side wall of the smoke inlet cavity inclines forwards from bottom to top. Above-mentioned structural design for first air intake also corresponds the slope setting, has enlarged the negative pressure scope of this first air intake department, reduces the oil smoke and openly escapes from the lampblack absorber, further promotes the smoking effect.

In order to further reduce the oil smoke from escaping from the front side of the guide plate, the top of the oil smoke inlet cavity is provided with a part extending forwards as a horizontal cavity, and the bottom of the horizontal cavity is provided with a second air inlet.

In order to avoid the oil smoke from escaping from the left side and the right side, the second air inlets are arranged in an extending mode along the left and right directions of the horizontal cavity.

In order to realize good flow guiding effect (wall attachment effect) on oil smoke and avoid the problem of interference between the flow guide plate and a pot on a cooking bench, the forward tilting angle of the flow guide plate cannot be too large or too small, so that the included angle between the flow guide plate and a horizontal plane is alpha under the open state of the flow guide plate, and the alpha is more than or equal to 20 degrees and less than or equal to 80 degrees. Alpha is preferably 45 °

In order to avoid the oil drops on the guide plate from falling onto the cooking bench, the bottom of the smoke inlet cavity is also provided with an oil cup for receiving the oil flowing down from the guide plate.

Compared with the prior art, the utility model has the advantages that: when the range hood works, the guide plate can be inclined forwards from top to bottom, under the wall attachment effect (coanda effect), oil smoke can flow forwards and upwards along the guide plate and finally enters the first air inlet, and due to the design of the guide plate, the oil smoke is reduced to be easily influenced by left and right cross winds, and the oil smoke dissipation condition is avoided. On the other hand, the first air inlet of the range hood is arranged relatively close to the upper side, the guide plate is opened by taking a straight line where the lower side edge of the guide plate is located or a parallel line adjacent to the straight line as a rotation axis and inclining forwards from top to bottom, the overturning track of the guide plate is far away from the cooker, and the problem of interference between the guide plate and the cooker when a user uses a high pot is avoided. In the preferred scheme, through with first air intake slope setting and cooperation top second air intake, can enlarge the negative pressure scope of range hood air intake department, avoid the oil smoke to escape from range hood's front, further promote the smoking effect.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of the present invention (the baffle is in an open state);

fig. 2 is a schematic perspective view of a structure according to an embodiment of the present invention (a baffle is in a folded state);

FIG. 3 is a left side view of an embodiment of the utility model (baffle in open state);

fig. 4 is a vertical sectional view of the embodiment of the present invention with the deflector in an open state, taken along the front-to-rear direction);

fig. 5 is a schematic perspective view (showing an oil cup) of the matching state of the baffle and the driving mechanism according to the embodiment of the present invention.

Detailed Description

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

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 5, a range hood includes a housing 10, a fan system 11, a driving mechanism 40, and a baffle 30, wherein the fan system 11 is disposed in an upper space of the housing 10 for providing a negative pressure. The lower portion of the casing 10 has a vertically extending smoke inlet cavity 20, and a first air inlet 210 is opened on the front side wall of the smoke inlet cavity 20. The guide plate 30 is disposed on the front side wall of the smoke inlet cavity 20 and can be turned in the front-back direction.

Fig. 1 is a schematic perspective view of the present embodiment, wherein the baffle 30 is in an open state. The inner cavity of the smoke inlet cavity 20 is communicated with the inner cavity of the casing 10, the smoke inlet cavity 20 comprises a vertical cavity 21 extending vertically and a horizontal cavity 22 extending forwards from the top of the vertical cavity 21, wherein a first air inlet 210 is formed in the front side wall of the smoke inlet cavity 20, the first air inlet 210 extends in the left-right direction, and specifically comprises a plurality of strip-shaped air inlet holes which extend longitudinally (extend in the up-down direction) and are arranged at intervals in the left-right direction. The bottom of the horizontal chamber 22 has a second air inlet 220 extending in the left-right direction, and the second air inlet 220 also includes a plurality of strip-shaped air inlet holes extending longitudinally (extending in the front-rear direction) and arranged at intervals in the left-right direction.

With continued reference to fig. 1, the bottom of the smoke inlet cavity 20 is provided with an oil cup 12, and the oil cup 12 is elongated and extends along the left and right direction of the smoke inlet cavity 20 for receiving the oil flowing down from the diversion plate 30. The length of the oil cup 12 is substantially the same as the width of the smoke inlet cavity 20. Preferably, the lower side of the baffle 30 is projected vertically to fall into the oil cup 12.

Referring to fig. 1 and 2, the baffle 30 is deflectably connected to the front side of the smoke inlet cavity 20 by using a straight line of the lower side edge of the baffle or a parallel line adjacent to the straight line as a rotation axis, specifically, the rotation axis of the baffle 30 is located below the first air inlet 210. The baffle 30 has a retracted state covering the front side wall of the smoke intake chamber 20 during rotation (see fig. 2 for details) and an open state inclined forward from the bottom to the top with respect to the forward deflection of the smoke intake chamber 20 (see fig. 1 for details). Wherein, the both sides of the lower side of guide plate 30 can be connected on advancing cigarette cavity 20 through round pin axle rotation, specifically can be connected on the preceding lateral wall of vertical cavity 21, also can be connected on the left and right sides wall of vertical cavity 21.

The above-mentioned "the lower side of the deflector deflects or the parallel line adjacent to the lower side of the deflector deflects", is not limited to the rotation of the lower side of the deflector 30, but it can be understood that, in the deflection process of the deflector 30, the deflection distance of the upper side area of the deflector 30 relative to the smoke inlet cavity 20 is relatively large, and the deflection distance of the lower side area of the deflector 30 relative to the smoke inlet cavity 20 is relatively small.

When the air deflector 30 is in the folded state, at least a portion of the first air inlet 210 is located above the air deflector 30, that is, the first air inlet 210 of this embodiment is disposed relatively above, and when the air deflector 30 is in the folded state, a portion or all of the first air inlet 210 is in an exposed state. Preferably, in the present embodiment, when the air guiding plate 30 is in the folded state, the whole area of the first air inlet 210 is located above the air guiding plate 30, as shown in detail in fig. 2. Because the first air inlet 210 is arranged relatively close to the upper side, the flow trend of the smoke can be better complied with, and the smoke immediately enters the first air inlet 210 when leaving the upper side edge of the guide plate 30, so that the problem of oil smoke escape is reduced.

Fig. 3 is a left side view of the present embodiment, and it can be seen that the rear side wall of the smoke inlet cavity 20 is vertically arranged, so that when the range hood is assembled, a wall-attached design can be realized, the depth (i.e., the distance in the front-back direction) of the range hood is reduced, the condition that the traditional range hood blocks the line of sight is avoided, the range hood is also prevented from being large, the user feedback is overall more inhibited, and the head of the range hood is not easy to collide with the line of sight. The preceding lateral wall of the smoke inlet cavity 20 of this embodiment inclines forward from bottom to top, and this structural design for first air intake 210 also corresponds the slope setting, has enlarged the negative pressure scope of this first air intake 210 department, reduces the oil smoke and openly escapes from the lampblack absorber, further promotes the smoking effect.

In order to achieve good flow guiding effect (wall attachment effect) for the oil smoke and avoid the interference problem between the flow guiding plate 30 and the pot on the cooking bench, the forward tilting angle of the flow guiding plate 30 can be neither too large nor too small, so in the present embodiment, the flow guiding plate 30 is in the open state, the included angle between the flow guiding plate 30 and the horizontal plane is α, 20 ° ≦ α ≦ 80 °, and α is preferably 45 °.

Fig. 4 is a vertical cross-sectional view of the range hood of this embodiment along the front-back direction, the driving mechanism 40 is disposed on the smoke inlet cavity 20, and the power output end of the driving mechanism is connected to the flow guide plate 30, so as to drive the flow guide plate 30 to rotate front and back relative to the smoke inlet cavity 20. The driving mechanism 40 includes a driving motor 41 and a link transmission assembly including a first link 42, a second link 43, and a third link 44. The driving motor 41 can be fixed on the inner wall of the smoke inlet cavity 20. The first end of the first link 42 is connected to the output shaft of the driving motor 41 and can be deflected by the output shaft of the driving motor 41. The second end of the first link 42 is connected to the first end of the second link 43, the second end of the second link 43 is hinged to the first end of the third link 44, and the third link 44 is connected to the inner wall of the baffle 30. To reduce the interference effect of the third link 44 with the front side wall of the smoke intake cavity 20, the third link 44 of the present embodiment is a curved arc-shaped rod. When the driving motor 41 rotates forward and backward, the guide plate 30 can be driven by the corresponding connecting rod transmission component to deflect forward and backward.

Referring to fig. 5, the two driving mechanisms 40 of the present embodiment are respectively disposed at the left and right sides of the smoke inlet cavity 20 to ensure the stability of the rotation process of the guide plate 30. The two driving mechanisms 40 of the present embodiment can realize synchronous actions through linkage cooperation of mechanical structures or program control.

On the basis of the above embodiments, other embodiments can be obtained by replacing and improving the related technical features. For example, the front side wall of the smoke inlet cavity 20 of the present embodiment may also be vertically extended, and correspondingly, the bottom wall of the horizontal cavity 22 may be slightly inclined upward from the back to the front or slightly inclined downward from the back to the front, or may be an arc structure that is recessed upward from the front and back sides to the middle area. For another example, the baffle 30 is not limited to a flat plate structure, and may be a completely or partially curved arc plate or the like. For another example, the baffle of the present embodiment may also be first translated outward (i.e., forward) for a certain distance and then deflected, so as to avoid the baffle from being blocked due to interference with other parts of the range hood when the baffle rotates.

Claims (10)

1. A range hood, comprising:

the smoke exhausting device comprises a shell (10), wherein a fan system (11) is arranged in the shell, a smoke inlet cavity (20) is formed in the lower portion of the shell (10), and a first air inlet (210) is formed in the front side wall of the smoke inlet cavity (20);

it is characterized by also comprising:

the guide plate (30) is arranged at the front side of the smoke inlet cavity (20) in a deflection way by taking a straight line on which the lower side edge of the guide plate is positioned or a parallel line adjacent to the straight line as a rotation axis, and has a folding state covering the front side wall of the smoke inlet cavity (20) and an opening state which deflects forwards relative to the smoke inlet cavity (20) and inclines forwards from bottom to top;

when the baffle plate (30) is in a folded state, at least part of the first air inlet (210) is positioned above the baffle plate (30).

2. The range hood of claim 1, further comprising:

and the driving mechanism (40) is arranged on the smoke inlet cavity (20), and the power output end of the driving mechanism is connected with the guide plate (30), so that the guide plate (30) is driven to rotate front and back relative to the smoke inlet cavity (20).

3. The range hood of claim 2, wherein: the drive mechanism (40) comprises:

the driving motor (41) is arranged in the smoke inlet cavity (20);

the connecting rod transmission assembly comprises a first connecting rod (42), a second connecting rod (43) and a third connecting rod (44), wherein the first end of the first connecting rod (42) is connected with an output shaft of the driving motor (41) and can deflect under the driving of the output shaft of the driving motor (41), the second end of the first connecting rod (42) is connected with the first end of the second connecting rod (43), the second end of the second connecting rod (43) is hinged with the first end of the third connecting rod (44), and the third connecting rod (44) is connected with the inner wall of the guide plate (30).

4. The range hood of claim 2, wherein: the two driving mechanisms (40) are respectively arranged at the left side and the right side of the smoke inlet cavity (20).

5. The range hood of any one of claims 1-4, wherein: the first air inlet (210) extends along the left and right directions of the smoke inlet cavity (20), and the first air inlet (210) is located on the guide plate (30) when the guide plate (30) is in a folding state.

6. The range hood of any one of claims 1-4, wherein: the front side wall of the smoke inlet cavity (20) inclines forwards from bottom to top.

7. The range hood according to any one of claims 1 to 4, wherein: the smoke inlet cavity (20) comprises a vertical cavity (21) extending vertically and a horizontal cavity (22) extending forwards from the top of the vertical cavity (21), the first air inlet is located in the front side wall of the vertical cavity (21), and a second air inlet (220) is formed in the bottom of the horizontal cavity (22).

8. The range hood of claim 7, wherein: the second air inlet (220) extends along the left and right direction of the horizontal cavity (22).

9. The range hood of any one of claims 1-4, wherein: when the guide plate (30) is in an open state, the included angle between the guide plate (30) and the horizontal plane is alpha, and alpha is more than or equal to 20 degrees and less than or equal to 80 degrees.

10. The range hood of any one of claims 1-4, wherein: and an oil cup (12) for receiving oil flowing down from the guide plate (30) is further arranged at the bottom of the smoke inlet cavity (20).

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