CN219222553U - Fume exhauster - Google Patents

Abstract

The utility model discloses a range hood, which comprises a fume collecting hood and a fume baffle, wherein the fume collecting hood comprises a bottom plate, the bottom plate is upwards protruded to form a first fume collecting cavity and a second fume collecting cavity which are arranged left and right below the bottom plate, a first air inlet is formed in a part of the bottom plate corresponding to the first fume collecting cavity, and a second air inlet is formed in a part of the bottom plate corresponding to the second fume collecting cavity; the smoke baffle plates are arranged left and right, and can be in a state of being folded in the corresponding smoke collecting cavity and an open state exceeding the corresponding side of the smoke collecting cover; the range hood further comprises a first baffle and a second baffle, wherein the first baffle is arranged at the first air inlet and can rotate around the axis extending from front to back so as to be positioned at the first air inlet and far away from the inner side of the first smoke collecting cavity or towards the outer side of the first smoke collecting cavity, and the second baffle is arranged at the second air inlet and can rotate around the axis extending from front to back so as to be positioned at the second air inlet and far away from the inner side of the second smoke collecting cavity or towards the outer side of the second smoke collecting cavity.

Description

Fume exhauster

Technical Field

The utility model relates to a lampblack purifying device, in particular to a range hood.

Background

A range hood has become one of the indispensable kitchen appliances in modern families, and generally, the range hood comprises a top-suction type and a side-suction type, and the range hood with the top-suction type has been increasingly used due to the advantages of being neat and light, occupying small space, and the like. The top suction type range hood generally comprises a fume collecting hood and a fan frame positioned on the fume collecting hood, wherein a volute, an impeller and a motor for driving the impeller are arranged in the fan frame.

However, the inlet of the top-draft range hood is far away from the fume source, and the fume suction effect is easy to be disturbed, because the negative pressure area of the inlet of the range hood is far away from the cooker, and the inlet air speed is small, and the negative pressure intensity is small. One of the common methods at present is to improve the fume sucking effect by changing the inlet structure, wherein the air inlet area of the fume exhauster can be reduced, the inlet air speed and the negative pressure intensity of the fume exhauster can be improved, and the fume sucking effect can be effectively improved when the fume amount is not large. The specific method is that the air inlet area of the smoke machine is directly reduced, the air inlet area is indirectly reduced through an encrypted oil net, and the like.

For a double-cavity top-suction range hood (the range hood with the shape can be seen in the prior application of the applicant, and the application number is 202122621562.6), a large wall surface (generally, an illuminating lamp is arranged at the position) is easily reserved between the cavity openings at two sides, so that oil smoke is easily caused to impact the wall surface of the air inlet to cause oil smoke collapse. The air inlet area is indirectly reduced in an oil screen encrypting mode, so that the problems of blockage of the oil screen, increase of the cleaning difficulty of the oil screen and the like are easily caused along with the increase of the service time. On the other hand, under the condition that different oil smoke amounts are generated during cooking, the vibration and noise of the range hood can be improved by increasing the rotating speed of the fan inside the range hood, and the user experience is affected.

Disclosure of Invention

The utility model aims to solve the technical problems of the prior art, and provides a range hood which operates with lower noise and reduces the collapse and escape of oil smoke.

The technical scheme adopted for solving the technical problems is as follows: the smoke collecting hood comprises a bottom plate, wherein the bottom plate is upwards protruded to form a first smoke collecting cavity and a second smoke collecting cavity which are arranged left and right below the bottom plate, a first air inlet is formed in a part, corresponding to the first smoke collecting cavity, of the bottom plate, and a second air inlet is formed in a part, corresponding to the second smoke collecting cavity, of the bottom plate;

the smoke baffle plates are arranged left and right, each smoke baffle plate corresponds to one smoke collecting cavity, and can be in a state of being folded in the corresponding smoke collecting cavity and in an open state exceeding the corresponding side of the smoke collecting cover; the method is characterized in that:

the range hood further comprises a first baffle and a second baffle, wherein the first baffle is arranged at the first air inlet and can rotate around the axis extending from front to back to be located at the first air inlet and away from the inner side of the first smoke collecting cavity or towards the outer side of the first smoke collecting cavity, and the second baffle is arranged at the second air inlet and can rotate around the axis extending from front to back to be located at the second air inlet and away from the inner side of the second smoke collecting cavity or towards the outer side of the second smoke collecting cavity.

By arranging the baffle plates which can be in the internal guide and external states, the phenomena of oil smoke collapse and escape caused under the condition that the air inlet area of the existing top-suction type range hood is reduced can be improved, and a series of troubles caused by an oil network encryption method are avoided; the cooking fume extractor is suitable for different cooking environments, and the traditional mode of enhancing the fume extraction effect by changing the rotating speed of the fan can be provided with allowance, so that the operation noise of the cooking fume extractor can be reduced, the installation height of the cooking fume extractor can be improved, and the like.

Preferably, in order to facilitate the lampblack rising to the middle area of the range hood to capture and guide the lampblack, the molded lines of the baffles are airfoil-shaped.

In order to ensure the air intake, the depth of each baffle plate is at least 50% of the depth of the corresponding air inlet, the depth of each baffle plate is at most equal to the depth of the corresponding air inlet, and the width of each baffle plate is smaller than the width of the corresponding air inlet after being projected to the plane of the corresponding air inlet.

In order to ensure that the air inlet area of the position close to the front of the corresponding air inlet is larger, the escape of front-side oil smoke is reduced, the depth of each baffle is smaller than that of the corresponding air inlet, and each baffle is arranged at the rearmost position of the corresponding air inlet.

Further, for being convenient for set up the baffle, first air intake is from left to right gradually downward sloping ground extension, the second air intake is from right to left gradually downward sloping ground extension the bottom plate is located the part between two air intakes and is the middle part wall, first baffle rotates with the bottom plate and is connected in the crossing department of first air intake and middle part wall, second baffle rotates with the bottom plate and is connected in the crossing department of second air intake and middle part wall.

Further, in order to facilitate driving of the baffle, the range hood further comprises a first movement mechanism, wherein the first movement mechanism comprises a driving mechanism, a bevel gear set and a rotating shaft, the driving mechanism is a double-shaft servo motor, and an output shaft of the driving mechanism extends in the left-right direction;

the number of the rotating shafts is two, each rotating shaft rotationally connects the corresponding baffle plate with the bottom plate, and the rotating shafts extend in the front-rear direction;

the bevel gear sets also have two sets, each set comprising first and second intermeshing bevel gears, wherein the first bevel gear is disposed on and rotates synchronously with the output shaft and the second bevel gear is disposed on and rotates synchronously with the rotating shaft.

Preferably, for stable adjustment, the rotating shaft is a damping shaft.

For the ability of further adjusting the air intake, play controllable effect to the range hood effect, be less than the width of corresponding air intake behind each baffle width projection to corresponding air intake plane, first baffle and second baffle all include main baffle and auxiliary baffle, auxiliary baffle sets up the one side of keeping away from the middle part wall at main baffle, range hood still includes second actuating mechanism, and it is flexible to remove about for main baffle through second actuating mechanism drive auxiliary baffle.

Compared with the prior art, the utility model has the advantages that: by arranging the baffle plates which can be in the internal guide and external states, the phenomena of oil smoke collapse and escape caused under the condition that the air inlet area of the existing top-suction type range hood is reduced can be improved, and a series of troubles caused by an oil network encryption method are avoided; the cooking device is suitable for different cooking environments, and can provide allowance for the traditional mode of enhancing the smoking effect by changing the rotating speed of the fan, so that the operation noise of the range hood can be reduced, the installation height of the range hood can be improved and the like compared with the traditional mode; the angle of the baffle is turned and the auxiliary baffle is telescopic, so that the capacity of adjusting the air inlet through the baffle is enhanced, and a strong controllable effect is achieved on the fume suction effect.

Drawings

Fig. 1 is a schematic view of a range hood according to an embodiment of the present utility model (extended state of a baffle);

fig. 2 is a cross-sectional view (left-right cross-section) of the range hood of fig. 1;

fig. 3 is a cross-sectional view (horizontal cross-section) of the range hood of fig. 1;

fig. 4 is a schematic view of a baffle assembly of a range hood according to an embodiment of the present utility model;

fig. 5 is a schematic view of a baffle profile of a range hood according to an embodiment of the present utility model;

fig. 6 is a schematic view of a range hood (retracted state of the baffle) according to an embodiment of the present utility model

Fig. 7 is a cross-sectional view (horizontal cross-section) of the range hood of fig. 6;

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same 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 utility model, it should 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", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for purposes of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and because the disclosed embodiments of the present utility model may be arranged in different orientations, these directional terms are merely for illustration and should not be construed as limitations, such as "upper", "lower" are not necessarily limited to orientations opposite or coincident with the direction of gravity. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly.

Referring to fig. 1 to 4, a range hood is a top-suction type range hood, and comprises a fume collecting hood 1, a fan frame 2 arranged above the fume collecting hood 1, and a fan system 3 arranged in the fan frame 2.

The fume collecting hood 1 includes a bottom plate 13 at the bottom, the bottom plate 13 is upwardly protruded so that a first fume collecting chamber 11 and a second fume collecting chamber 12 are formed below the bottom plate 13 in a left-right arrangement, and a cross section of each fume collecting chamber is preferably substantially triangular (the cross section is a cross section in a left-right vertical direction shown in fig. 2), that is, a portion of the bottom plate 13 corresponding to the first fume collecting chamber 11 is upwardly protruded from a left side and a right side near a middle of the second fume collecting chamber 12 (the middle is not a middle of the fume collecting hood 1 but a position between the left and right sides of the first fume collecting chamber 11), and a portion of the bottom plate 13 corresponding to the second fume collecting chamber 12 is upwardly protruded from the right side and a left side near a middle of the first fume collecting chamber 11 (the middle is not a middle of the fume collecting hood 1 but a position between the left and right sides of the second fume collecting chamber 12).

The first air intake 14 has been seted up to the part that corresponds first album of cigarette chamber 11 on the bottom plate 13, and the part that corresponds second album of cigarette chamber 12 on the bottom plate 13 is equipped with second air intake 15 separately, and first air intake 14 is from left to back gradually downward sloping ground extension, and second air intake 15 is from right to left gradually downward sloping ground extension. The first air inlet 14 and the second air inlet 15 are symmetrically arranged. The space above the bottom plate 13 in the fume collecting hood 1 is in fluid communication with the fan frame 2, whereby each fume collecting cavity is in fluid communication with the fan frame 2 through a corresponding air inlet.

Preferably, the width of the fume collecting hood 1 in the left-right direction may be 890 to 900mm, and the depth in the front-rear direction may be 420 to 450mm. The depth of each air inlet in the front-rear direction can be 280-350 mm, and the width of each air inlet in the left-right direction can be 130-160 mm.

The range hood further comprises two smoke baffle plates 4, wherein the smoke baffle plates 4 are respectively and rotatably arranged at the bottom of the smoke collecting hood 1, and the rotating connection positions are one sides, away from each other, of the two smoke baffle plates 4. The left-side smoke baffle plate 4 corresponds to the first smoke collecting chamber 11, the right-side smoke baffle plate 4 corresponds to the second smoke collecting chamber 12, and is located outside (lower side) the air inlets of the respective smoke collecting chambers, respectively, and can open and close the respective air inlets by rotating. When the smoke baffle 4 is closed, the smoke baffle 4 is folded in the corresponding smoke collecting cavity, and when the smoke baffle 4 is opened, the smoke baffle can extend beyond the corresponding side of the smoke collecting hood 1 in the left-right direction, so that the smoke collecting area (negative pressure area) of the side (left side or right side) is enlarged.

The smoke baffle 4 can be driven by the existing movement mechanism to rotate relative to the smoke collecting hood 1, and the rotation axis extends in the front-rear direction, such as a motor, an electric push rod and the like. Preferably, the movement mechanisms of the two smoke baffles 4 can be independent or linked. In the initial state, the smoke baffle plate 4 can be in a state of being folded in the corresponding smoke collecting cavity. When the cooking of the right side cooking range is performed, the smoke baffle 4 on the right side is opened, and when the cooking of the left side cooking range is performed, the smoke baffle 4 on the left side is opened. The two smoke baffle plates 4 can be opened when the single-side cooking range is used for cooking, so that the interference of side wind on two sides of the range hood can be prevented, a stable flow field is formed above the cooker, and the smoking effect is more stable. When the two cooking heads cook, both smoke baffle plates 4 can be opened.

The portion of the bottom plate 13 located between the two air inlets is denoted as a central wall 131 and the portion of the bottom plate 13 located outside each of the smoke collecting chambers (left side of the first smoke collecting chamber 11, right side of the second smoke collecting chamber 12) is denoted as an extension wall 132. The width of the middle wall 131 may be 110mm.

The bottom of the middle wall 131 is provided with an oil collecting assembly 5, and an oil drain hole (not shown) may be formed in the bottom plate 13 so that oil stains on the upper surface of the bottom plate 13 are collected in the oil collecting assembly 5. The angle between the plane of each inlet opening and the extension wall 132 of the base 13 is alpha.

The range hood further comprises a baffle assembly, each baffle can be divided into a plurality of baffle plates, gaps are reserved between the baffle plates or not, preferably, the number of the baffle plates is two, and the baffle plates are respectively arranged at the first air inlet 14 and the second air inlet 15. That is, the baffle assembly includes a first baffle 61 provided at the first air intake port 14 and a second baffle 62 provided at the second air intake port 15, the first baffle 61 and the second baffle 62 being rotatably connected with the bottom plate 13, respectively, and the rotation axis extending in the front-rear direction. The first baffle 61 is rotatably connected to the bottom plate 13 at the intersection of the first air inlet 14 and the middle wall 131, and the second baffle 62 is rotatably connected to the bottom plate 13 at the intersection of the second air inlet 15 and the middle wall 131.

When the cooking environments are different (the oil smoke amount is different), the adjustable baffle is in different states of internal guide (the corresponding air inlet faces the inside of the smoke collecting cover 1, namely, the side far away from the smoke collecting cavity) or external guide (the corresponding air inlet faces the outside of the smoke collecting cover 1, namely, the side facing the smoke collecting cavity).

Preferably, each baffle is a wing, referring to fig. 7, each baffle profile (the profile of the upper surface or the lower surface on the vertical section) may be an airfoil formed by a combination of straight lines, arc-like lines, etc. (straight lines and straight lines, straight lines and arc-like lines, arc-like lines and arc-like lines), and in different combinations, smooth connection is preferably performed (i.e. the profile is guided everywhere in mathematical description). Baffle profiles can be mainly divided into 3 major categories: (1) a back guide; (2) a linear type; (3) and (3) guiding type. The method can be divided into a key dimension of a wing plate initial angle (short for a wing initial angle beta) and a wing plate end angle (short for a wing end angle gamma), wherein the wing initial angle beta is a pilot type when being larger than the wing end angle gamma, otherwise, the wing initial angle beta is a back pilot type, and the wing initial angle beta and the wing end angle gamma are equal and are linear. The baffle tangential angle (wing cut angle) is defined as: and an included angle between a plane along the tangential direction of the baffle and a horizontal line. Therefore, the wing cut angles of different positions of the arc-like baffle are different.

The baffle of interior leading type has wholly reduced the air inlet area of corresponding air intake, thereby the air intake wind speed promotes, negative pressure strengthens to some extent and improves the oil smoke effect, but because the "interior leading" characteristic of baffle still exists certain wind speed and negative pressure around the baffle, will rise to the oil smoke of range hood middle part region and catch the water conservancy diversion, and the oil smoke striking wall surface collapsibility escape phenomenon does not appear. Based on the baffle's flow directing characteristics, it is preferred that the baffle should have a substantial majority of its airfoil cut angle greater than 45 °. In addition, the wing cut angles of all positions of the baffle plate are not smaller than 0 degrees, so that the oil smoke is prevented from being scattered and escaping due to the impact effect after contacting the baffle plate.

The depth of each baffle is at least 50% of the depth of the corresponding air inlet, and is at most equal to the depth of the corresponding air inlet. When the depth of the baffle is smaller than that of the corresponding air inlet, the baffle can be arranged at any position. Preferably, the baffle plate is arranged at the rearmost position of the corresponding air inlet, so that the air inlet area of the front position of the corresponding air inlet is ensured to be larger. The width of the baffle plate is smaller than the width of the corresponding air inlet after being projected to the plane of the corresponding air inlet, preferably, the baffle plate accounts for about 30% -70% of the width of the corresponding air inlet, and the baffle plate is determined according to the actual optimal fume suction effect of different models.

In this embodiment, the width and depth of the first baffle 61 are smaller than the first air inlet 14, so that the fume can enter the fume collecting hood 1 from the front side and the left side of the first baffle 61, and the width and depth of the second baffle 62 are smaller than the second air inlet 15, so that the fume can enter the fume collecting hood 1 from the front side and the right side of the second baffle 62. Preferably, the front side and the rear side of the baffle can be sealed to block the air flow between the molded line of the rear side of the baffle and the corresponding air inlet so as to ensure the air speed and the negative pressure of the main body of the corresponding air inlet.

When the baffle plate is adjusted to rotate to the outer side (external) of the corresponding plane, a plane baffle plate with a linear baffle plate molded line is preferably selected.

The baffle is shaped differently by a molded line, and is a two-dimensional baffle in nature. The shape design in the front-rear direction of the baffle plate can design the baffle plate as a three-dimensional baffle plate. One of the three-dimensional baffles is processed by the following steps: the rear end of the baffle is slightly raised (or the front end and the rear end of the baffle are unchanged, the middle part of the baffle is slightly raised to form a state that the middle is high and the two ends are low), so when the oil cup is arranged in the middle of the bottom plate 13, oil stains flow to the front end (middle) along the baffle, and the baffle has the oil guiding function.

To achieve the above-described shutter rotational adjustment, the shutter assembly further includes a first movement mechanism 63, and the first movement mechanism 63 includes a driving mechanism 631, a bevel gear set 632, and a rotation shaft 633, wherein the driving mechanism 631 is preferably a biaxial servo motor, and an output shaft 6311 thereof extends in the left-right direction. The rotation shafts 633 have two, each rotation shaft 633 rotatably connects one of the shutters with the bottom plate 13, the rotation shaft 633 extends in the front-rear direction, and in this embodiment, the rotation shaft 633 includes two hollow shafts capable of rotating relatively, one of which is fixed to the bottom plate 13, and the other of which is fixed to the corresponding shutter by a fixing piece 634. The bevel gear set 632 also has two sets, each set 632 comprising a first bevel gear 6321 and a second bevel gear 6322 intermeshed, wherein the first bevel gear 6321 is disposed on the output shaft 6311 and rotates synchronously with the output shaft 6311, and the second bevel gear 6322 is disposed on the rotating shaft 633 and rotates synchronously with the rotating shaft 633. A reduction member such as a reduction gear set may be provided between the output shaft 6311 and the bevel gear set 632 to achieve more accurate adjustment of the baffle angle.

The rotating shaft 633 is preferably a damping shaft, and the damping shaft should be moderate, and can bear the inertial rotation of the baffle caused by gravity, and can effectively express the output torque of the servo motor 631. The number of the fixing sheets 634 of the rotating shaft 633 is preferably at least two and the fixing sheets are arranged at intervals front and back, so that the effective and stable fixation of the baffle plates is ensured. The shaft 633 should be sufficiently rigid to ensure a stable overall structure and effective engagement of the bevel gears.

Therefore, when the driving mechanism 631 is started, the bevel gear set 632 changes the rotation direction, and finally drives the rotating shaft 633 to rotate, so as to drive the two baffles to rotate for adjustment.

Alternatively, each baffle may have an independent rotational drive module.

When the cooking environment is different (the oil smoke amount is generated in different sizes), the different states of the inner guide (the corresponding air inlet faces the inside of the smoke collecting cover 1, namely, the side far away from the smoke collecting cavity) and the outer guide (the corresponding air inlet faces the outside of the smoke collecting cover 1, namely, the side facing the smoke collecting cavity) of the adjustable baffle are respectively applicable to the following states:

(1) The inner guide baffle plate mainly has the functions of (1) reducing the air inlet area and improving the negative pressure of an inlet; (2) and (5) diversion. The problem of smoke leakage of the front end of the middle wall 131 is solved, the smoke absorbing effect of the main body under the condition of large amount of smoke is improved, and the secondary capture is prevented after the large amount of smoke impacts the wall surface.

(2) The external baffle plate has the main functions of (1) further reducing the air inlet area and increasing the inlet negative pressure; (2) absorbing and lifting the oil smoke. Improving the oil smoke absorbing effect under the condition of small oil smoke.

The baffle of interior guide compares with external baffle: the negative pressure of the air inlet is smaller, and the effective air quantity is larger.

Therefore, when the amount of the oil smoke is large, the adjusting baffle plate is rotated to an inner guide state, so that the negative pressure of the air inlet is improved to a certain extent while the effective air quantity of the range hood is ensured, and the quickly rising oil smoke is guided to the fan system, so that the oil smoke is prevented from rapidly striking the middle wall and collapsing and escaping. (2) When the amount of the small oil smoke is small, the adjusting baffle is rotated to an external state, and the effective air quantity is reduced, so that the capture of the small oil smoke can be ensured. On the other hand, the rising oil smoke which is originally slow and small in quantity is easy to be disturbed and is not allowed to flow out from the inlet of the smoke machine, after the negative pressure of the air inlet is further increased, the oil smoke which is slow and small in quantity is captured in a reinforcing mode, and after the rising oil smoke reaches the external baffle, the rising oil smoke is adsorbed by the baffle due to the fact that the speed is low, and the falling oil smoke is not allowed to flow out due to the fact that the baffle is impacted.

In addition, the first baffle 61 and the second baffle 62 may be made to have a double-plate structure, each including a main baffle 611 and a sub-baffle 612, the sub-baffle 612 being disposed on a side of the main baffle 611 away from the middle wall 131, and the second movement mechanism 64 driving the sub-baffle 612 to move left and right with respect to the main baffle 611 to achieve expansion and contraction. The horizontal movement is not strictly required here, but the movement direction will be at an angle to the horizontal due to the different angles of the baffles. The second motion mechanism 64 is a linear driving module, such as an electric push rod, a motor screw nut assembly, etc. The secondary baffles 612 remain partially overlapped with the primary baffles 611 throughout the telescoping adjustment. By adjusting the auxiliary baffle 612, the overall area of the baffle can be changed, so that the air inlet state is changed, and the smoking effect is optimized. The extended state is seen in fig. 1-3 and the contracted state is seen in fig. 6 and 7.

The angle of the baffle is turned and the auxiliary baffle is telescopic, so that the capacity of adjusting the air inlet through the baffle is enhanced, and a strong controllable effect is achieved on the fume suction effect.

Claims (8)

1. The utility model provides a range hood, includes collection petticoat pipe (1) and keeps off cigarette board (4), collection petticoat pipe (1) include bottom plate (13), thereby bottom plate (13) are upwards protruding to be formed with first collection cigarette chamber (11) and second collection cigarette chamber (12) that left and right sides arranged under bottom plate (13), first air intake (14) have been seted up to the part that corresponds first collection cigarette chamber (11) on bottom plate (13), second air intake (15) have been seted up to the part that corresponds second collection cigarette chamber (12) on bottom plate (13);

the smoke baffle plates (4) are provided with two smoke collecting cavities which are arranged left and right, each smoke baffle plate (4) corresponds to one smoke collecting cavity, and the smoke baffle plates (4) can be in a state of being folded in the corresponding smoke collecting cavity and in an open state exceeding the corresponding side of the smoke collecting hood (1); the method is characterized in that:

the range hood further comprises a first baffle (61) and a second baffle (62), the first baffle (61) is arranged at the first air inlet (14) and can rotate around the axis extending from front to back to be located at the inner side of the first air inlet (14) away from the first smoke collecting cavity (11) or towards the outer side of the first smoke collecting cavity (11), and the second baffle (62) is arranged at the second air inlet (15) and can rotate around the axis extending from front to back to be located at the second air inlet (15) away from the inner side of the second smoke collecting cavity (12) or towards the outer side of the second smoke collecting cavity (12).

2. The range hood of claim 1, wherein: the molded line of each baffle is an airfoil.

3. A range hood according to claim 1 or 2, wherein: the depth of each baffle is at least 50% of the depth of the corresponding air inlet, the depth of each baffle is at most equal to the depth of the corresponding air inlet, and the width of each baffle is smaller than the width of the corresponding air inlet after being projected to the plane of the corresponding air inlet.

4. A range hood according to claim 3, wherein: the depth of each baffle is smaller than that of the corresponding air inlet, and each baffle is arranged at the rearmost position of the corresponding air inlet.

5. A range hood according to claim 1 or 2, wherein: the first air inlet (14) gradually extends downwards from left to right, the second air inlet (15) gradually extends downwards from right to left, the part of the bottom plate (13) between the two air inlets is a middle wall (131), the first baffle (61) is rotationally connected with the bottom plate (13) at the intersection of the first air inlet (14) and the middle wall (131), and the second baffle (62) is rotationally connected with the bottom plate (13) at the intersection of the second air inlet (15) and the middle wall (131).

6. The range hood of claim 5, wherein: the range hood further comprises a first movement mechanism (63), the first movement mechanism (63) comprises a driving mechanism (631), a bevel gear set (632) and a rotating shaft (633), the driving mechanism (631) is a double-shaft servo motor, and an output shaft (6311) of the driving mechanism (631) extends in the left-right direction;

the number of the rotating shafts (633) is two, each rotating shaft (633) rotationally connects a corresponding baffle plate with the bottom plate (13), and the rotating shafts (633) extend in the front-rear direction;

the bevel gear sets (632) also have two sets, each set of bevel gears (632) comprising a first bevel gear (6321) and a second bevel gear (6322) intermeshed, wherein the first bevel gear (6321) is disposed on the output shaft (6311) and rotates synchronously with the output shaft (6311), and the second bevel gear (6322) is disposed on the rotating shaft (633) and rotates synchronously with the rotating shaft (633).

7. The range hood of claim 6, wherein: the rotating shaft (633) is a damping shaft.

8. The range hood of claim 5, wherein: each baffle width projection is less than the width of corresponding air intake behind corresponding air intake plane, first baffle (61) and second baffle (62) all include main baffle (611) and vice baffle (612), vice baffle (612) set up in main baffle (611) one side of keeping away from middle part wall (131), range hood still includes second actuating mechanism (64), and through second actuating mechanism (64) drive vice baffle (612) for main baffle (611) side-to-side removal realizes the flexible.

Images