CN111156561A

CN111156561A - Fume exhaust fan

Info

Publication number: CN111156561A
Application number: CN202010123977.8A
Authority: CN
Inventors: 蒋郑; 王磊
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2020-02-27
Filing date: 2020-02-27
Publication date: 2020-05-15

Abstract

The invention discloses a range hood, which comprises a fan frame and a first air inlet body capable of lifting relative to the fan frame, wherein the first air inlet body comprises a first box body and a first air inlet arranged on the front side of the first box body, and the range hood is characterized in that: the range hood also comprises a second air inlet body which can lift relative to the fan frame, the second air inlet body comprises a second box body and a smoke baffle plate arranged on the front side of the second box body, the first air inlet body is inserted into the second air inlet body, and the first air inlet body and the second air inlet body are both communicated with the inside of the fan frame; when the range hood is in a non-working state, the first air inlet body retracts into the second air inlet body, the smoke baffle plate is tightly attached to the bottom of the fan frame, when the range hood is in a working state, the height of the smoke baffle plate is lower than that of the smoke baffle plate in the non-working state, and the first air inlet body downwards extends out of the second air inlet body to enable the first air inlet to be lower than the smoke baffle plate.

Description

Fume exhaust fan

Technical Field

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

Background

The range hood has become one of the indispensable kitchen household electrical appliances in modern families. The range hood works by utilizing the fluid dynamics principle, sucks and exhausts oil smoke through a centrifugal fan arranged in the range hood, and filters partial grease particles by using a filter screen. The centrifugal fan comprises a volute, an impeller arranged in the volute and a motor driving the impeller to rotate. When the impeller rotates, negative pressure suction is generated in the center of the fan, oil smoke below the range hood is sucked into the fan, accelerated by the fan and then collected and guided by the volute to be discharged out of a room.

The existing range hood is installed on a certain fixed height on a wall. Once the kitchen ventilator is installed and fixed, the kitchen ventilator cannot be changed, and if the kitchen ventilator is installed too high, oil smoke generated during cooking cannot be fully discharged outdoors, so that serious pollution is brought to a kitchen, and meanwhile, the kitchen ventilator causes harm to the health of workers in the kitchen; this can be an obstacle for the staff in the kitchen if the installation is too low. And the height of workers in a kitchen is different, so that certain requirements are also met on the installation height of the range hood. For the problem, many merchants adopt the expanded width of the range hood casing, and although a certain effect is produced, the problem is not solved fundamentally.

Because the range hood is higher in installation position (about 70cm away from a cooking bench), a part of gas inevitably escapes in the process of oil smoke rising, and the oil smoke is inhaled by people from the mouth and the nose to influence the respiratory tract health; meanwhile, as the oil fume can not be completely sucked out, if the oil fume is not cleaned in time, a part of the waste oil attached to the surface of the filter screen of the range hood is easy to generate the dripping phenomenon, and even the oil fume carelessly falls into a cooking utensil to cause secondary pollution to food.

Therefore, a range hood with a liftable air inlet body is provided, for example, chinese patent with application number 201811096500.4 discloses a liftable double-suction range hood, which comprises a cabinet body, a main air driving mechanism, a main suction mechanism, a lifting mechanism, an auxiliary suction mechanism, a main smoke removal mechanism and an auxiliary smoke removal mechanism, wherein the main suction mechanism comprises a smoke suction shell with a smoke suction port, the smoke suction shell is obliquely provided with a filter plate at the smoke suction port, the lifting mechanism comprises a pair of lifting components for driving the smoke suction shell to move up and down and a driving piece for driving the lifting components to move, the lifting components are positioned and installed on the lifting shell, and reinforcing ribs corresponding to the lifting components are arranged on the smoke suction shell.

The existing range hood can realize side suction (back suction), and in order to ensure good oil fume suction effect, the range hood generally needs to be provided with a fume baffle to prevent oil fume from escaping upwards. Tests show that in order to prevent the oil smoke from spreading outwards and escaping from the coverage area of the smoke baffle, a larger horizontal component force is required to be provided by the suction force provided by the air inlet on the rear side so as to achieve the effect of pulling the oil smoke inwards, and therefore the height of the air inlet needs to be lower than that of the smoke baffle. Like above-mentioned current range hood, simple integrative lift (air inlet body and keep off the cigarette board) is difficult to realize the disguise of shutdown state, and air inlet body part is located keeps off cigarette board below (keep off the cigarette board and has prevented it to enter in the fan frame) under the shutdown state, perhaps still needs a drive arrangement to close the back with the air inlet body and hide in the fan frame together with keeping off the cigarette board.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a range hood aiming at the defects in the prior art, which realizes hiding property in a shutdown state and better oil smoke absorption effect in a working state, greatly reduces the manufacturing cost and improves the running reliability of the whole machine.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a range hood, includes the fan frame and the first air inlet body that can go up and down relatively the fan frame, first air inlet body includes first box and sets up the first air intake in first box front side, its characterized in that: the range hood also comprises a second air inlet body which can lift relative to the fan frame, the second air inlet body comprises a second box body and a smoke baffle plate arranged on the front side of the second box body, the first air inlet body is inserted into the second air inlet body, and the first air inlet body and the second air inlet body are both communicated with the inside of the fan frame; when the range hood is in a non-working state, the first air inlet body retracts into the second air inlet body, the smoke baffle plate is tightly attached to the bottom of the fan frame, when the range hood is in a working state, the height of the smoke baffle plate is lower than that of the smoke baffle plate in the non-working state, and the first air inlet body downwards extends out of the second air inlet body to enable the first air inlet to be lower than the smoke baffle plate.

In order to realize the lifting of the different strokes of the first air inlet body and the second air inlet body, the lifting device further comprises a movement mechanism for driving the first air inlet body and the second air inlet body to lift, wherein the movement mechanism comprises a linear driving module for driving the second air inlet body to lift, a roller arranged on a second box body of the second air inlet body, a first rope connecting point arranged in a fan frame, a second rope connecting point arranged in the first box body of the first air inlet body and a rope, the roller is higher than the second rope connecting point, one end of the rope is connected to the first rope connecting point, and the other end of the rope is connected to the second rope connecting point after bypassing the roller, so that the stroke of the first air inlet body in the lifting process is larger than that of the second air inlet body.

In order to facilitate the arrangement of the roller, a roller support is arranged on the upper portion of the second box body of the second air inlet body, the upper end of the roller support extends onto the second box body, the roller is rotatably arranged on the upper portion of the roller support, and the rotating shaft of the roller extends in the left-right direction.

Preferably, the first rope connection point is arranged at the front side in the fan frame, and the second rope connection point is arranged at the front side in the first box body of the first air inlet body.

In order to guide the second air inlet body to lift relative to the fan frame, the moving mechanism further comprises guide rails, and the left side and the right side of the second air inlet body outside the second box body are connected with the left side and the right side of the fan frame in a sliding mode through the guide rails.

Preferably, the linear driving module comprises a driving mechanism and a transmission mechanism, the transmission mechanism comprises a screw rod which is driven by the driving mechanism to rotate around the axis of the screw rod and a sliding block which is connected with the second box body of the second air inlet body, the screw rod extends in the longitudinal direction, and the sliding block is arranged on the screw rod and is in threaded connection with the screw rod.

In order to reduce the escape of oil smoke and improve the oil smoke absorption effect, a second air inlet is formed in the bottom of the front side of the second box body, and the second air inlet is lower than the smoke baffle plate.

In order to facilitate rectification and separation of grease, a filter screen is arranged between the lower edge of the second air inlet and the lower side of the front side of the smoke baffle plate, and the filter screen gradually inclines downwards and extends from front to back.

In order to improve the oil smoke absorption effect, a fan system is arranged on the front side in the fan frame, and the first air inlet body and the second air inlet body correspond to the rear side of the fan frame, so that back suction is realized.

Compared with the prior art, the invention has the advantages that: through the arrangement of the first air inlet body provided with the first air inlet and the second air inlet body provided with the smoke baffle which are separated, the hiding performance of the non-working state of the range hood and a better oil smoke absorption effect in the working state are realized, the manufacturing cost is greatly reduced, and the running reliability of the whole range hood is improved; the driving mechanism and the transmission mechanism are arranged on the second air inlet body with short stroke, and the large stroke action of the first air inlet body is realized by adopting a roller structure, so that the stroke requirement on the driving mechanism is reduced, the driving load has no impact change, and the operation is more stable; the lifting at different heights is realized by fixing the ropes at different points, and the different mounting height requirements of the range hood are met.

Drawings

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

FIG. 2 is a sectional view of the range hood according to the embodiment of the present invention;

fig. 3 is an exploded structural sectional view (hidden fan system) of the range hood according to the embodiment of the present invention;

fig. 4 is a schematic diagram of a range hood in a shutdown state according to an embodiment of the present invention;

FIG. 5 is a sectional view of a range hood according to an embodiment of the present invention in a shutdown state;

fig. 6 is a schematic diagram of a movement process of the range hood according to the embodiment of the present invention.

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 includes a first air inlet body 1, a second air inlet body 2 and a fan frame 3, wherein the first air inlet body 1 and the second air inlet body 2 can lift in the fan frame 3, and a fan system 4 is arranged in the fan frame 3.

The first air inlet body 1 comprises a hollow first box body 11 and a first air inlet 12 arranged at the lower part of the front side of the first box body 11, and the upper end of the first box body 11 is open. The second air inlet 2 includes a hollow second box 21, a second air inlet 22 provided at a lower portion of a front side of the second box 21, and a smoke barrier 23 provided at the front side of the second box 21 and located above the second air inlet 22. The second casing 22 is opened at an upper end and also at a lower end. The front side of the smoke baffle 23 can be bent downwards, a filter screen 24 can be arranged between the lower edge of the second air inlet 22 on the second box body 21 and the lower side of the front side of the smoke baffle 23, and the filter screen 24 is inclined downwards and extends from front to back gradually so as to guide oil smoke and play a role in guiding oil. The oil smoke can enter the second box body 21 from the lower part of the smoke baffle 23, pass through the filter screen 24 and enter the second box body 21 from the second air inlet 22. Alternatively, the smoke barrier 23 may be configured as a flat plate at the bottom of the front side of the second box 22, and the second air inlet 22 and the filter net 24 are not provided (the filter net 24 may be provided at the first air inlet 12).

The fan system 4 sets up the front side in fan frame 3, and in first box 11 upwards inserted second box 21, second box 21 upwards inserted fan frame 3, the rear side of fan system 4, first box 11 of first air inlet body 1 and second box 21 of second air inlet body 2 all communicate (fluid intercommunication) with fan frame 3 is interior, realizes the back suction.

In the closed state of the range hood, the top end of the first box 11 and the top end of the second box 21 may be flush or nearly flush. In the open state of the range hood, the top end of the first box body 11 is located below the top end of the second box body 21. That is, the first air inlet body 1 and the second air inlet body 2 have different strokes of lifting, and the stroke of the first air inlet body 1 is greater than that of the second air inlet body 2.

In the invention, a set of motion mechanism is arranged to realize the lifting of the first air inlet body 1 and the second air inlet body 2 in different strokes. The moving mechanism comprises a driving mechanism 51, a transmission mechanism 52, a roller 53 arranged on the second box body 21 of the second air inlet body 2, a first rope connecting point 54 arranged in the fan frame 3, a second rope connecting point 55 arranged in the first box body 11 of the first air inlet body 1, a rope 56 and a guide rail 57. The left and right sides of the second air inlet body 2 outside the second box body 21 are connected with the left and right sides of the fan frame 3 in a sliding way through guide rails 57.

The upper part and the left and right sides of the second box 21 of the second air intake body 2 are respectively provided with a roller bracket 531, the upper end of the roller bracket 531 extends above the second box 21, and the roller 53 is rotatably arranged on the upper part of the roller bracket 531, i.e. the roller 53 is positioned above the second box 21. The rotational axis of the roller 53 extends in the left-right direction.

The fan frame 3 is connected with the first air inlet body 1 through a rope 56. The first rope attachment point 54 is provided at the front portion in the fan frame 3, for example, below the fan system 4, and the second rope attachment point 55 is provided at the front side in the first casing 11 of the first inlet body 1, preferably, at the upper portion of the first casing 11. A cord 56 is attached at one end to the first cord attachment point 54 and at the other end to the second cord attachment point 55 around the roller 53. By providing rollers 53, it is convenient to both support cable 56 and facilitate the sliding of cable 56.

The fan frame 3 is connected with the second air inlet body 2 through a transmission mechanism 52. The drive mechanism 51, preferably a motor, is disposed on top of the fan frame 3. The transmission mechanism 52 includes a screw rod 521, a slider 522 and a connecting bracket 523, the screw rod 521 is connected with the output end of the motor to be capable of rotating around its axis and extends in the longitudinal direction, preferably in the vertical direction, the slider 522 is disposed on the screw rod 521 and is in threaded connection with the screw rod 521, the slider 522 is connected with the connecting bracket 523, the connecting bracket 523 is located at the periphery of the screw rod 521 and the slider 522, and the connecting bracket 523 can be connected with the rear side in the second box 21 of the second air intake body 2 at the bottom.

The driving mechanism 51 and the transmission mechanism 52 may also be other existing linear driving modules, for example, the transmission mechanism adopts a synchronous belt, the driving mechanism 51 adopts a hydraulic cylinder, and the like.

When the range hood is in a non-working state, referring to fig. 4 and 5, most of the first air inlet body 1 and the second air inlet body 2 are embedded into the fan frame 3, the second air inlet body 2 is only positioned below the smoke baffle plate 23 and the position below the smoke baffle plate and is tightly attached to the bottom of the fan frame 3, the bottom of the first air inlet body 1 is not lower than the bottom of the second air inlet body 2, and is preferably flush, that is, when the range hood is in a non-working state, the first air inlet body 1 is completely retracted into the second air inlet body 2. When the range hood enters the working state from the non-working state, the driving mechanism 51 is started, the second air inlet body 2 is driven to move downwards, the positions of the second box body 21 and the smoke baffle plate 23 are gradually reduced, the rope 56 is lowered, the first air inlet body 1 moves downwards, the arrangement of the roller 53 enables the movement stroke of the first air inlet body 1 to be larger than that of the second air inlet body 2, the first air inlet body 1 gradually extends downwards out of the second air inlet body 2, the working position is finally reached, the first air inlet 12 is lower than the smoke baffle plate 23 at the moment, the upper edge of the first air inlet 12 can be flush with the upper edge of the second air inlet 22, and the situation that the first box body 11 blocks oil smoke from entering the second air inlet 22 is avoided. Then, part of the oil smoke enters the first box 11 from the first air inlet 12, and part of the oil smoke enters the first box 11 from the second air inlet 22, passes through the part of the second box 21 exceeding the first box 11, enters the fan frame 3, and is discharged by the fan system 4.

The principle of the difference in the travel of the two air inlets is as follows, see fig. 6, the vertical distance a between the roller 53 and the first rope connection point 54 and the horizontal distance W₁The distance between the roller 53 and the first rope attachment point 54 is L₀In the operating state, the descending height of the roller 53 (i.e. the descending height of the smoke barrier 23 of the second air inlet 2) is X₁At this time, the distance from the roller 53 to the first rope connecting point 54 is L₁. The descending height of the first air inlet body 1 is Y₁。Y₁＝X₁+(L₀-L₁) And is further provided with

In order to ensure the relative position of the first air inlet body 1 and the smoke baffle 23, L is required to be ensured₀-L₁Is a constant value. According to different lowering heights X₁Changing W₁(with the first rope attachment point 54 located at a different location) or a value of a, the relative position during operation can be guaranteed, i.e. the lifting of different strokes can be met, and the device is suitable for different installation conditions.

Through the structure, the hiding performance (the outer side can wrap the cupboard) of the non-working state (shutdown) of the range hood and the better oil smoke absorption effect in the working state are realized, the manufacturing cost is greatly reduced, and the running reliability of the whole range hood is improved. In addition, the driving mechanism and the transmission mechanism are arranged on the second air inlet body 2 with short stroke, and the roller structure is adopted to realize the large stroke action of the first air inlet body 1, so that the stroke requirement on the driving mechanism is reduced, the driving load has no impact change, and the operation is more stable; the lifting at different heights is realized by fixing the ropes at different points, and the different mounting height requirements of the range hood are met.

The term "fluid communication" as used herein refers to a spatial relationship between two components or portions (hereinafter collectively referred to as a first portion and a second portion, respectively), i.e., a fluid (gas, liquid or a mixture of both) can flow along a flow path from the first portion and/or be transported to the second portion, and may be a direct communication between the first portion and the second portion, or an indirect communication between the first portion and the second portion via at least one third element, such as a fluid channel, e.g., a pipe, a channel, a duct, a flow guide, a hole, a groove, or a chamber that allows a fluid to flow through, or a combination thereof.

Claims

1. The utility model provides a range hood, includes fan frame (3) and the first air inlet body (1) that can relatively fan frame (3) go up and down, first air inlet body (1) includes first box (11) and sets up first air intake (12) in first box (11) front side, its characterized in that: the range hood further comprises a second air inlet body (2) which can lift relative to the fan frame (3), the second air inlet body (2) comprises a second box body (21) and a smoke baffle plate (23) arranged on the front side of the second box body (21), the first air inlet body (1) is inserted into the second air inlet body (2), and the first air inlet body (1) and the second air inlet body (2) are communicated with the inside of the fan frame (3);

when range hood is in the non-operating condition, first air inlet body (1) withdrawal is in second air inlet body (2), keep off the bottom of cigarette board (23) close in fan frame (3), when range hood is in operating condition, keep off the height that highly is less than when non-operating condition of cigarette board (23), first air inlet body (1) stretches out outside second air inlet body (2) downwards and makes first air intake (12) be less than and keep off cigarette board (23).

2. The range hood of claim 1, wherein: still including being used for driving the motion that first air inlet body (1) and second air inlet body (2) go up and down, motion includes the linear drive module that the drive second air inlet body (2) goes up and down, sets up gyro wheel (53) on second box (21) of second air inlet body (2), sets up first rope tie point (54) in fan frame (3), sets up second rope tie point (55) and rope (56) in first box (11) of first air inlet body (1), gyro wheel (53) are higher than second rope tie point (55), first rope tie point (54) are connected to one end of rope (56), and the other end is connected to second rope tie point (55) after bypassing gyro wheel (53), thereby makes the stroke of first air inlet body (1) in the lift in-process be greater than second air inlet body (2).

3. The range hood of claim 2, wherein: the upper portion of second box (21) of second air inlet body (2) is provided with gyro wheel support (531), and the upper end of gyro wheel support (531) extends to on second box (21), gyro wheel (53) set up the upper portion at gyro wheel support (531) with rotating, the axis of rotation of gyro wheel (53) extends in the left and right directions.

4. The range hood of claim 2, wherein: the first rope connecting point (54) is arranged on the front side in the fan frame (3), and the second rope connecting point (55) is arranged on the front side in the first box body (11) of the first air inlet body (1).

5. The range hood of claim 2, wherein: the movement mechanism further comprises a guide rail (57), and the left side and the right side outside the second box body (21) of the second air inlet body (2) are connected with the left side and the right side inside the fan frame (3) in a sliding mode through the guide rail (57).

6. The range hood according to any one of claims 2 to 5, wherein: the linear driving module comprises a driving mechanism (51) and a transmission mechanism (52), the transmission mechanism (52) comprises a screw rod (521) which is driven by the driving mechanism (51) to rotate around the axis of the transmission mechanism, and a sliding block (522) connected with the second box body (21) of the second air inlet body (2), the screw rod (521) extends in the longitudinal direction, and the sliding block (522) is arranged on the screw rod (521) and is in threaded connection with the screw rod (521).

7. The range hood according to any one of claims 1 to 5, wherein: and a second air inlet (22) is formed in the bottom of the front side of the second box body (21), and the second air inlet (22) is lower than the smoke baffle plate (23).

8. The range hood of claim 7, wherein: and a filter screen (24) is arranged between the lower edge of the second air inlet (22) and the lower side of the front side of the smoke baffle plate (23), and the filter screen (24) gradually inclines downwards and extends from front to back.

9. The range hood according to any one of claims 1 to 5, wherein: the front side in fan frame (3) is provided with fan system (4), first air inlet body (1) and second air inlet body (2) correspond the rear side of fan frame (3).