CN115654547A

CN115654547A - Fume exhaust fan

Info

Publication number: CN115654547A
Application number: CN202211324487.XA
Authority: CN
Inventors: 王磊
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2022-10-27
Filing date: 2022-10-27
Publication date: 2023-01-31

Abstract

The invention discloses a range hood, which comprises an air inlet assembly and an upper box body, wherein an air inlet is formed in the position, close to the rear end part, of the bottom surface of the upper box body; the air inlet assembly further comprises a baffle plate which can open and close the air inlet in a back-and-forth movement mode, the upper end portion of the smoke baffle plate is located at the air inlet and can move in a back-and-forth movement mode, and therefore the position of the smoke baffle plate when the air inlet is opened is located on the front side of the position when the air inlet is closed. Compared with the prior art, the invention has the advantages that: through the translation of baffle, the air intake is opened under realizing closing and the operating condition of air intake under the power off state, and the cigarette board can promote forward when the turnover simultaneously, guarantees good oil absorption cigarette effect, and the cigarette board moves backward when closing, accomplishes extremely to be frivolous.

Description

Fume exhaust fan

Technical Field

The invention relates to a mechanical mounting structure, 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.

Because the space of the kitchen is limited, in order to improve the space utilization rate of the kitchen, a thin range hood is provided, for example, a novel ultra-thin range hood with a structure disclosed in the Chinese patent with the application number of 201420538159.4 comprises a bellows and a smoke suction cavity, wherein the smoke suction cavity is arranged right below the bellows and is communicated with the bellows, the smoke suction cavity is arranged close to a wall body, and a front panel of the smoke suction cavity is gradually inclined towards the wall body from top to bottom; also, as disclosed in the chinese patent with application No. 201820775851.7, an ultra-thin bottom-suction range hood includes an air box and a smoke collecting hood, the smoke collecting hood is disposed under the air box and is communicated with the air box; the wind box is in a three-dimensional columnar cabinet shape, the smoke collecting hood is a rectangular flat plate with a hollow interior, and the width of the smoke collecting hood is larger than the height of the smoke collecting hood; the lower side of the smoke collecting cover is a hidden air inlet arranged along the long edge of the smoke collecting cover, the smoke collecting cover is provided with a smoke guide plate, the smoke guide plate is arranged right above the hidden air inlet, and the smoke guide plate and the front wall of the smoke collecting cover cavity form an included angle of 45-60 degrees.

Therefore, no matter the existing thin range hood forms a near-suction type by air inlet from the front side or a low-suction type by air inlet from the bottom, an air inlet channel close to a wall must be reserved, and in order to ensure the oil smoke absorption effect, the air inlet channel is not too small, so that the exposed part of the range hood still has a larger thickness.

Disclosure of Invention

The present invention provides a range hood, which can reduce the space occupied by the exposed part of the range hood and improve the space utilization rate on the premise of ensuring the effect of oil smoke absorption.

The technical scheme adopted by the invention for solving the technical problems is as follows: a range hood comprises an air inlet assembly and an upper box body, wherein an air inlet is formed in the position, close to the rear end of the bottom surface of the upper box body, the air inlet assembly comprises a back plate and a smoke baffle plate, the back plate extends downwards from the rear side of the upper box body, the smoke baffle plate is rotatably arranged on the front side of the back plate, the lower end of the smoke baffle plate is a free end, and the rotating axis of the smoke baffle plate extends in the left-right direction; the method is characterized in that:

the air inlet assembly further comprises a baffle plate, the baffle plate can open and close the air inlet in a front-and-back movement mode, the upper end portion of the smoke baffle plate is located at the air inlet and can move in the front-and-back movement mode, and therefore the position of the smoke baffle plate when the air inlet is opened is located on the front side of the position of the smoke baffle plate when the air inlet is closed.

Translation through the baffle, realize closing of air intake under the power off state and the air intake is opened under the operating condition, keep off the cigarette board simultaneously and can promote forward when the jack-up and form inlet air channel between the backplate, enlarge and hold together the cigarette region, guarantee good oil absorption cigarette effect, keep off the cigarette board and move backward when closing, until pressing close to backplate (wall), under the prerequisite of assurance structural strength, need not to form the inlet air channel of fixed inner chamber form, can accomplish extremely frivolous, reduce the occupation space of range hood exposed part, and the space utilization is improved.

In order to realize the maximum air inlet area, the upper end part of the smoke baffle is attached to the rear end part of the baffle.

Preferably, the range hood still includes the motion that is used for driving and keeps off cigarette board and baffle linkage, the motion includes linear drive module, guide rail subassembly and first connecting rod, the guide rail subassembly including fix in last box first guide rail and with first guide rail sliding fit's second guide rail, linear drive module's output and second guide rail are connected, the baffle is connected fixedly and synchronous motion with the second guide rail, first connecting rod rotates with the second guide rail and is connected and fixed with keeping off the cigarette board. The movement mechanism can thereby be simplified.

Furthermore, the motion mechanism comprises a driving end and a driven end, the positions of the driving end and the driven end, which are respectively connected with the smoke baffle, are arranged at intervals in the left-right direction, the positions of the driving end and the driven end, which are respectively connected with the baffle, are arranged at intervals in the left-right direction, the driving end and the driven end both comprise the guide rail assembly and the first connecting rod, and the driving end further comprises the linear driving module. The smoke baffle is connected with the guide rail assembly, the forward and backward movement of the second guide rail at the driving end determines the rotation angle of the smoke baffle, and then the forward and backward movement of the second guide rail at the driven end can be controlled, because the smoke baffle is not absolutely rigid, the second guide rails at two sides respectively have stroke differences at the head end and the tail end in a movement system, and the second guide rails at two sides can be directly connected by the baffle, so that the synchronization of the movement of the two sides is ensured; secondly when the left and right sides motion is asynchronous, the difference of both sides second guide rail shape journey leads to keeping off the turned angle difference of cigarette board, keeps off the distortion of cigarette board, can correct asynchronous.

Furthermore, in order to enable the first connecting rod to stably rotate, the movement mechanism further comprises a second connecting rod, one end of the first connecting rod is fixed with the upper end of the smoke baffle, the other end of the first connecting rod is rotatably connected with one end of the second connecting rod, and the other end of the second connecting rod is rotatably arranged in the upper box body.

Furthermore, in order to ensure the consistency of the rotation direction when the smoke baffle is opened or closed, the distance from the rotation joint of the second connecting rod and the upper box body to the rear side of the upper box body is less than or equal to the distance from the rotation joint of the second connecting rod and the first connecting rod to the rear side of the upper box body.

According to one aspect of the invention, the linear driving module comprises a motor, a gear and a rack, wherein the output end of the motor is in transmission connection with the gear, the rotation axis of the gear extends along the left-right direction, and the rack is meshed with the gear and is fixed with the second guide rail.

According to another aspect of the invention, the linear drive module is an electric push rod.

Further, the left and right sides of keeping off the cigarette board still is provided with the curb plate, the curb plate is extended backward by two sides about keeping off the cigarette board, can reduce the fit clearance of exposed surface from this, promotes the wholeness, and both sides board can prevent the excessive pressure release of both sides simultaneously, guarantees the oil absorption cigarette effect.

Furthermore, in order to collect oil stains on the upper box body and the air inlet assembly conveniently, an oil cup is arranged at the bottom of the back plate.

Compared with the prior art, the invention has the advantages that: through the translation of the baffle, the air inlet is closed in a shutdown state and opened in a working state, meanwhile, the smoke baffle can be pushed forwards when being turned up to form an air inlet channel with the back plate, the smoke gathering area is enlarged, and a good smoke suction effect is ensured; the high-precision synchronization of the movement of the left side and the right side of the smoke baffle plate and the baffle plate can be ensured through the connection of the guide rail assembly with the smoke baffle plate and the arrangement of the driving end and the driven end; through set up the curb plate in the fender cigarette board left and right sides, can reduce the fit clearance of exposed face, promote the wholeness, the both sides board can prevent both sides excessive pressure release simultaneously, guarantees the oil absorption cigarette effect.

Drawings

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

FIG. 2 is a cross-sectional view of the range hood of FIG. 1;

FIG. 3 is a schematic view of a smoke barrier, a baffle and a moving mechanism thereof of the range hood of FIG. 1;

FIG. 4 is an enlarged view of a portion I of FIG. 3;

fig. 5 is a schematic view of the range hood according to the first embodiment of the present invention in an intermediate opened state;

FIG. 6 is a cross-sectional view of the extractor hood of FIG. 5;

fig. 7 is a schematic view of the opening state of the range hood according to the first embodiment of the present invention;

FIG. 8 is a cross-sectional view of the extractor hood of FIG. 7;

fig. 9 is a sectional view of a range hood according to a second embodiment of the present invention in a closed state;

fig. 10 is a sectional view of a range hood according to a second embodiment of the present invention in an opened 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 "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.

Example one

Referring to fig. 1 to 6, a range hood includes an air intake assembly 1 and an upper box 2, and a fan system (not shown) is disposed in the upper box 2. In the installed state, the upper box 2 is hidden in the cabinet of the kitchen, the bottom surface of the upper box 2 can be flush with the cabinet, and only the air inlet component 1 is exposed below the cabinet. Alternatively, the fan system may be provided in another case communicating with the upper case 2.

An air inlet 21 is formed in the bottom surface of the upper box body 2 at a position close to the rear side end, and the air inlet 21 extends in the left-right direction. The air intake assembly 1 includes a back plate 11, a smoke barrier 12 and a baffle 13, wherein the back plate 11 extends downward from the rear side of the upper case 2, which may be independent or integrated with the upper case 2. The bottom of the back plate 11 is provided with an oil cup 3.

The smoke barrier 12 is rotatably provided on the front side of the back plate 11, the lower end portion thereof is a free end, and the rotation axis extends in the left-right direction. The baffle 13 is disposed at the air inlet 21 in a manner of moving back and forth, and the baffle 13 may be slightly higher than the bottom surface of the upper case 2 to avoid interference. Wherein, the upper end of the smoke barrier 12 is located at the air inlet 21 and can move back and forth, preferably, the smoke barrier 12 is close to the rear end of the baffle 13.

The smoke barrier 12 and the baffle 13 can be driven by independent motion mechanisms or driven by the same motion mechanism to link. In the embodiment, the movement form of the smoke baffle 12 and the baffle 13 is linkage, and for this purpose, the range hood further comprises a movement mechanism for driving the smoke baffle 12 and the baffle 13 to be linked. The moving mechanism includes a driving mechanism 41 and a transmission mechanism, the driving mechanism 41 is preferably a motor, the transmission mechanism includes a gear 421, a rack 422, a guide rail component 423, a first link 424 and a second link 425, an output end of the driving mechanism 41 is in transmission connection with the gear 421, as in this embodiment, the gear 421 may be disposed on an output shaft of the driving mechanism 41 (motor), and a rotation axis of the gear 421 extends in the left-right direction. The rack 422 is engaged with the gear 421, the rail assembly 423 includes a first rail 4231 fixed in the upper casing 2 and a second rail 4232 slidably engaged with the first rail 4231, the rack 422 is fixed with the second rail 4232, and the barrier 13 is fixed with the second rail 4232. Therefore, when the driving mechanism 41 is started, the second guide rail 4232 is driven to slide back and forth through the cooperation of the gear and the rack, and further the baffle 13 is driven to slide back and forth.

The first link 424 is rotatably disposed on the second guide rail 4232, one end of the first link 424 is fixed to the upper end of the smoke barrier 12, the other end of the first link is rotatably connected to one end of the second link 425, and the other end of the second link 425 is rotatably disposed in the upper case 2. The rotational axes of the first link 424 and the second link 425 each extend in the front-rear direction. Therefore, when the second guide rail 4232 slides back and forth, the first link 424 can be driven to rotate, so that the smoke barrier 12 is driven to realize the compound motion of moving back and forth and rotating around the rotating connection part with the second guide rail 4232, and the upper end part of the smoke barrier 12 is kept close to the rear end part of the baffle 13 in the motion process, so that the pressure relief caused by the generation of gaps is avoided. The second link 425 stabilizes the rotation of the first link 424.

Each part of the movement mechanism forms a driving end of the movement mechanism, the movement mechanism further comprises a driven end, and the difference from the driving end is that the movement mechanism only comprises a guide rail component 423, a first connecting rod 424 and a second connecting rod 425, the driving end is connected to one of the left side and the right side of the smoke baffle plate 12 and the baffle plate 13, the driven end is connected to the other of the left side and the right side of the smoke baffle plate 12 and the baffle plate 13, and the synchronous movement precision of the left side and the right side of the smoke baffle plate 12 and the baffle plate 13 is realized.

By adopting the movement mechanism of the embodiment, the smoke baffle plate 12 is connected with the guide rail component 423, the back and forth movement of the second guide rail 4232 at the driving end determines the rotation angle of the smoke baffle plate 12, and further the back and forth movement of the second guide rail 4232 at the driven end can be controlled, because the smoke baffle plate 12 is not absolutely rigid, the second guide rails 4232 at two sides respectively have stroke difference at the first and last ends in the movement system, and the baffle plate 13 can directly connect the second guide rails 4232 at two sides, thereby ensuring the synchronization of the movement of two sides (similar to the closed loop structure at the first and last ends). Secondly, when the left and right sides do not move synchronously, the difference of the shapes and the strokes of the second guide rails 4232 on the two sides causes the difference of the rotation angles of the smoke baffle plate 12, and the smoke baffle plate 12 is twisted, so that the asynchronous motion can be corrected.

In order to ensure the consistency of the rotation direction when the smoke barrier 12 is opened or closed, the distance from the rotation joint of the second connecting rod 425 and the upper box 2 to the rear side of the upper box 2 is less than or equal to the distance from the rotation joint of the second connecting rod 425 and the first connecting rod 424 to the rear side of the upper box 2.

The left and right sides of the smoke barrier 12 are also provided with side plates 14, and the side plates 14 extend backwards from the left and right sides of the smoke barrier 12. When the air inlet assembly 1 is closed, the side plate 14 wraps the back plate 11, the fit clearance of the exposed surface can be reduced, and the integrity is improved. Meanwhile, the two side plates 14 can prevent excessive pressure release on the two sides, and the oil smoke suction effect is ensured.

Referring to fig. 1 and 2, the range hood is in a closed state, in which the baffle 13 closes the air inlet 21, and the smoke baffle 12 is in a substantially vertically extending state.

Referring to fig. 5 and 6, when the range hood is turned on, the driving mechanism 41 is started to drive the baffle 13 to slide forward, gradually opening the air inlet 21, and simultaneously turning the smoke baffle 12 forward.

Referring to fig. 7 and 8, the baffle 13 slides forward to the limit position, that is, the rear end of the baffle 13 is flush with the front side edge of the air inlet 21, and the soot enters the upper case 2 through the air inlet 21 from the rear side of the soot-blocking plate 12.

This kind of form also makes air inlet subassembly 1 need not to form inlet air channel, keeps off cigarette board 12 can paste backplate 11 during closing for the holistic thickness of air inlet subassembly 1 accomplishes extremely frivolous, and preferred is about tens millimeters.

Example two

Referring to fig. 9 and 10, in the present embodiment, a difference from the first embodiment is that the driving mechanism 41 uses an electric push rod, and an output end of the electric push rod is in transmission connection with the second guide rail 4232 to drive the second guide rail 4232 to slide back and forth. To avoid interference with the rail assembly 423, the power push rod is angled from the horizontal and the output is rotationally coupled to the second rail 4232.

The existing other linear driving modules can also be adopted to replace a motor gear rack in the first embodiment and an electric push rod in the second embodiment, such as a motor lead screw nut combination, a motor multi-link combination and the like.

Claims

1. A range hood comprises an air inlet assembly (1) and an upper box body (2), wherein an air inlet (21) is formed in the position, close to the rear end of the bottom surface of the upper box body (2), the air inlet assembly (1) comprises a back plate (11) and a smoke baffle plate (12), the back plate (11) extends downwards from the rear side of the upper box body (2), the smoke baffle plate (12) is rotatably arranged on the front side of the back plate (11), the lower end of the smoke baffle plate is a free end, and the rotating axis of the smoke baffle plate (12) extends in the left-right direction; the method is characterized in that:

the air inlet assembly (1) further comprises a baffle (13), the baffle (13) can open and close the air inlet (21) in a front-and-back movement mode, the upper end portion of the smoke baffle (12) is located at the air inlet (21) and can move in the front-and-back movement mode, and therefore the position of the smoke baffle (12) when the air inlet (21) is opened is located on the front side of the position when the air inlet (21) is closed.

2. The range hood of claim 1, wherein: the upper end of the smoke baffle plate (12) is attached to the rear end of the baffle plate (13).

3. The range hood according to claim 1 or 2, wherein: range hood still includes the motion that is used for driving to keep off cigarette board (12) and baffle (13) linkage, the motion includes linear drive module, guide rail subassembly (423) and first link (424), guide rail subassembly (423) including fix first guide rail (4231) in last box (2) and with first guide rail (4231) sliding fit's second guide rail (4232), the output and the second guide rail (4232) of linear drive module are connected, baffle (13) are connected fixedly and synchronous motion with second guide rail (4232), first link (424) rotate with second guide rail (4232) to be connected and fixed with keeping off cigarette board (12).

4. A range hood as claimed in claim 3, wherein: the movement mechanism comprises a driving end and a driven end, the driving end and the driven end are respectively connected with the smoke baffle (12) at intervals in the left-right direction, the driving end and the driven end are respectively connected with the baffle (13) at intervals in the left-right direction, the driving end and the driven end respectively comprise the guide rail assembly (423) and the first connecting rod (424), and the driving end further comprises the linear driving module.

5. The range hood of claim 3, wherein: the movement mechanism further comprises a second connecting rod (425), one end of the first connecting rod (424) is fixed with the upper end of the smoke baffle plate (12), the other end of the first connecting rod is rotatably connected with one end of the second connecting rod (425), and the other end of the second connecting rod (425) is rotatably arranged in the upper box body (2).

6. The range hood of claim 5, wherein: the distance from the rotary connection position of the second connecting rod (425) and the upper box body (2) to the rear side of the upper box body (2) is less than or equal to the distance from the rotary connection position of the second connecting rod (425) and the first connecting rod (424) to the rear side of the upper box body (2).

7. The range hood of claim 3, wherein: the linear driving module comprises a motor, a gear (421) and a rack (422), the output end of the motor is in transmission connection with the gear (421), the rotating axis of the gear (421) extends in the left-right direction, and the rack (422) is meshed with the gear (421) and is fixed with the second guide rail (4232).

8. The range hood of claim 3, wherein: the linear driving module is an electric push rod.

9. The range hood of claim 1 or 2, wherein: the left side and the right side of the smoke baffle plate (12) are also provided with side plates (14), and the side plates (14) extend backwards from the left side and the right side of the smoke baffle plate (12).

10. The range hood of claim 1 or 2, wherein: an oil cup (3) is arranged at the bottom of the back plate (11).