Range hood

Abstract

The utility model relates to a range hood, which comprises a fan frame, a fan cover and a fan cover, the smoke collecting hood comprises a back plate, a front plate and a bottom, the bottom comprises a first part and a second part, and a smoke baffle is arranged at the second part; the centrifugal fan is provided with a front side air inlet channel and a rear side air inlet channel, the centrifugal fan is provided with a central plane in the longitudinal direction, and the central plane penetrates through the second part; the smoke barrier is provided with a near end and a far end, the near end is higher than the near end in the closed state in the open state, and the near end exceeds the bottom end of the first part in the open state; an oil cup is arranged on the rear side of the bottom of the exhaust fume collecting hood, the second part is provided with a first end and a second end which are opposite, the horizontal distance between the first end and the back plate is d1, the depth size of the exhaust fume collecting hood is d, d1 is larger than or equal to 1 / 8d, the horizontal distance between the second end and the first end is d2, and d2 is larger than or equal to 2 / 5d; in the opening state, the projection of the far end of the smoke baffle on the horizontal plane exceeds the front plate, and the far end of the smoke baffle downwards exceeds the bottom of the oil cup.

Description

[0001] The utility model claims the priority of Chinese patent with application number 202410497720.7, application date of April 24, 2024, and invention name of "Range Hood and Control Method Thereof". TECHNICAL FIELD

[0002] The utility model relates to kitchen appliance technical field, especially a kind of range hood. BACKGROUND

[0003] Range hood is mainly divided into top suction type range hood and side suction type range hood according to the distribution of smoke suction port and overall appearance. The smoke suction port of top suction type range hood is located directly above the cooking appliance, and the oil fume is quickly sucked into when rising near the smoke suction port. This kind of hood has larger longitudinal size, and the height position of panel is close to the forehead, so there is generally a problem of hitting forehead. The smoke suction port of side suction type range hood is located obliquely above the cooking appliance, and the smoke suction port is close to the cooking appliance, so the oil fume is quickly sucked into when rising. This kind of hood generally has a rotatable smoke folding plate, which can be opened to extract oil fume, and automatically closed after oil fume extraction and range hood shutdown.

[0004] For example, the side suction type range hood disclosed in Chinese utility model patent application with application number CN202220760103.8 (authorized announcement number: CN217635799U) has the following problems. Since the folding plate is hinged to the casing of range hood, in order to avoid jamming during rotation, a gap is left between the hinge part of folding plate and the casing of range hood. When the range hood is just closed, there is still oil fume in the inside of range hood and flue, and the gap between the hinge part of folding plate and the casing of range hood is easy to cause the overflow of residual oil fume. Some products use glass panel chamfer or set an aluminum strip between the smoke baffle and adjacent glass panel to adjust the gap between them, but this causes cost waste and destroys the overall sense of panel.

[0005] In addition, the existing fan is usually a double-inlet fan, and the oil fume is guided backward after being introduced by the folding plate, which causes uneven distribution of oil fume. The folding plate rotates around a fixed axis, and the length of folding plate is small to avoid blocking the line of sight, so the range of folding plate is small.

[0006] Therefore, the existing range hood needs further improvement. INVENTION CONTENTS

[0007] The first technical problem to be solved by the utility model is to provide a range hood that can effectively improve the problem of oil fume leakage due to the gap between smoke baffle and casing according to the status of prior art.

[0008] The second technical problem to be solved by the utility model is to provide an extractor hood capable of making oil fume uniformly enter a fan and having a large enough fume gathering range.

[0009] The utility model solves the above-mentioned first technical problem by adopting the technical scheme of an extractor hood comprising:

[0010] A machine shell is provided with an air inlet on the front side wall and a panel above the air inlet;

[0011] A fume baffle is rotatably arranged on the machine shell around a first axis extending left and right and capable of opening and closing the air inlet, the fume baffle having a first side adjacent to the first axis and a second side away from the first axis;

[0012] Further comprising a driving device arranged on the machine shell, a power output end of the driving device being connected with the panel so as to drive the panel to approach or move away from the first side of the fume baffle in the open state;

[0013] The front side wall of the machine shell above the air inlet is denoted as an installation wall, the driving device is a linear motion mechanism arranged on the installation wall, the fume baffle is moved along a direction perpendicular to the installation wall under the driving of the linear motion mechanism, the linear motion mechanism comprises a driving motor and a screw block assembly, the screw block assembly comprises a screw rod and a sliding block, the screw rod is connected with the output shaft of the driving motor in transmission and capable of rotating around its own axis under the driving of the driving motor, and the sliding block is arranged on the panel and connected with the screw rod in screw thread;

[0014] A smoke isolation bubble cotton capable of being compressed and restored after pressure release is further arranged between the panel and the installation wall.

[0015] The utility model solves the above-mentioned second technical problem by adopting the technical scheme of an extractor hood comprising:

[0016] A fan frame is internally provided with a centrifugal fan; and

[0017] A fume collecting hood is connected with the fan frame, the fume collecting hood comprises a back plate, a front plate and a bottom, the bottom is arranged between the front plate and the back plate, the bottom comprises a first part and a second part, the second part is provided with an air inlet, the first part is closer to the front plate than the second part, a fume baffle is arranged at the second part, the fume baffle has an open state and a closed state, in the open state, the fume baffle exposes the second part, in the closed state, the fume baffle covers the second part, and characterized in that:

[0018] The centrifugal fan has a front-side air inlet channel and a rear-side air inlet channel, and has a center plane in the longitudinal direction, which is perpendicular to the axis of the centrifugal fan, and which passes through the second portion;

[0019] The smoke baffle has a proximal end and a distal end, the proximal end is closer to the first portion in the closed state, the position of the proximal end in the open state is higher than that in the closed state, and the position of the proximal end in the open state is beyond the position of the bottom end of the first portion;

[0020] The bottom rear side of the smoke collecting cover is provided with an oil cup, the second portion is formed between the oil cup and the first portion along the longitudinal direction of the smoke collecting cover, the second portion has opposite first and second ends, the first end is close to the oil cup, the horizontal distance from the first end to the back plate is d1, the depth dimension of the smoke collecting cover is d, and d1≥1 / 8d is satisfied, and the horizontal distance from the second end to the first end is d2, and d2≥2 / 5d is satisfied;

[0021] In the open state, the projection of the position of the distal end of the smoke baffle on the horizontal plane exceeds the position of the front plate, and the position of the distal end of the smoke baffle in the height direction of the range hood exceeds the position of the bottom of the oil cup.

[0022] By making the proximal end of the smoke baffle exceed the bottom end of the first portion in the open state, part of the oil fume entering the air inlet along the smoke baffle hits or adheres to the bottom end of the first portion, and is diverted to flow forward, thereby weakening the flow guiding effect of the smoke baffle, making the oil fume more uniformly enter the front-side and rear-side air inlet channels, and providing a larger smoke gathering range, and due to the position of the proximal end in the open state being higher than that in the closed state, relative to the fixed-axis rotation of the smoke baffle, the lifting of the proximal end position can reduce the obstruction of the line of sight in the case of opening the same angle; in addition, the spacing between the first end of the second portion and the back plate is limited, ensuring that the oil cup has sufficient longitudinal space, and enabling the position of the first end of the second portion to be closer to the cooktop position, reducing the loss of wind power, and the spacing between the first and second ends of the second portion ensures sufficient longitudinal air inlet size; when the smoke baffle is opened, the distal end thereof exceeds the front plate of the smoke collecting cover forwardly and the oil cup downwardly, thereby providing a larger smoke gathering range and a lower negative pressure area.

[0023] Further, the height of the smoke collecting cover is H, and H≤250mm is satisfied. Thus, the height of the whole machine can be as low as possible while ensuring the oil smoke extraction effect.

[0024] Further, in the open state, the proximal end divides the first part into an upper part and a lower part, the size of the upper part along the extension direction of the bottom of the fume hood is L1, the size of the lower part along the extension direction of the bottom of the fume hood is L2, and 1 / 2≥L2 / L1≥1 / 5 is satisfied. If L2 / L1 is too large, too much oil fume will hit the first part, which can cause oil stains to easily form on the first part. Within the above range, the flow guiding effect of the upper end of the smoke baffle can be effectively weakened, and the second part can also remove the oil fume in the area between the smoke baffle and the lower part of the first part.

[0025] Further, the angle between the second part and the vertical plane is a, and in the open state, the angle between the line connecting the distal end of the smoke baffle and the bottom end of the first part and the vertical plane is b, and the difference between a and b is not greater than 25 degrees. By making the difference between the two angles not too large, the second part and the smoke baffle provide a more similar flow guiding effect, which is more conducive to the uniform entry of oil fume into the front and rear air inlet channels, effectively improving the oil fume extraction effect.

[0026] Further, the air inlet has a side air inlet and a central air inlet, and the side air inlet is located outside the central air inlet. By providing the side air inlet, side fume running outside the central air inlet can be prevented.

[0027] Preferably, to better prevent side fume running, the horizontal distance between the outer edge of the side air inlet and the corresponding side of the fume hood is L, and L<20cm is satisfied.

[0028] Further, the transverse size of the side air inlet is M1, the transverse size of the fume hood is M2, and M1 / M2≥1 / 12 is satisfied. According to the usual position of the burner of the gas stove, satisfying the above relationship can make the side air inlet correspond to the outer part of the pot on the burner during use, so as to better prevent fume running.

[0029] Further, one side air inlet is arranged on each side of the central air inlet, the area of the side air inlet is S1, the area of the central air inlet is S2, and 1 / 5.5≤S1 / S2≤1 / 4 is satisfied. Thus, the flow distribution of the side air inlet and the central air inlet is reasonable, and the fume guiding effect is better.

[0030] Further, the fume hood further has a side plate, and the projection of the side plate and the side air inlet on the horizontal plane does not overlap. So that the oil fume entering from the side air inlet flows upward in the rear channel.

[0031] Further, the second part is provided with an oil screen, and the central air inlet is arranged on the oil screen to preliminarily filter the oil fume.

[0032] Compared with the prior art, the utility model discloses the advantages that: panel setting is the structure of movable adjustment, specifically can be under the drive of driving device, relative to the first side edge of the smoke baffle in the open state is close or far, thereby, when the smoke baffle opens, the panel can be close to the first side edge of the smoke baffle, thereby making the gap between both smaller or eliminating the gap between both, avoiding the oil fume escaping here, by making the smoke baffle in the open state proximal end beyond the bottom end of the first part, part of the oil fume along the smoke baffle into the air inlet and impact the bottom end of the first part or adhere to the bottom end of the first part, divert and forwardly branch, thereby can weaken the flow guiding effect of the smoke baffle, make the oil fume more evenly enter the front side, rear side air inlet channel, and can provide greater smoke range, and because the position of the proximal end in the open state is higher than the closed state, relative to the fixed shaft rotation of the smoke baffle, in the case where the same angle opens, the promotion of the proximal end position can reduce the obstruction of the line of sight, in addition, the spacing between the first end of the second part and the back plate is limited, guarantees that the oil cup has enough longitudinal space, and makes the position of the first end of the second part can be closer to the stove head position, reduces the loss of wind force, and the spacing between the first end and the second end of the second part guarantees enough longitudinal air inlet size, when the smoke baffle opens, its distal end exceeds the front plate of the smoke collection hood forwardly, exceeds the oil cup downwardly, thereby can provide greater smoke range and lower negative pressure area. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is the three-dimensional structure schematic diagram of the range hood of the first embodiment of the utility model;

[0034] Figure 2 It is the left view of the range hood of the first embodiment of the utility model (the panel is in the initial position);

[0035] Figure 3 It is the left view of the range hood of the first embodiment of the utility model (the panel is in the state of moving outwards);

[0036] Figure 4 It is the vertical section view of the range hood of the first embodiment of the utility model along the front and back direction;

[0037] Figure 5 It is the vertical section view of the range hood of the first embodiment of the utility model along the front and back direction;

[0038] Figure 6 It is the vertical section view of the range hood of the first embodiment of the utility model along the front and back direction;

[0039] Figure 7 It is the closed state front view schematic diagram of the range hood of the second embodiment of the utility model;

[0040] Figure 8 Side view of the closed state of the range hood of the second embodiment of the present application;

[0041] Figure 9 Side view of the opened state of the range hood of the second embodiment of the present application;

[0042] Figure 10 Bottom view of the opened state of the range hood of the second embodiment of the present application;

[0043] Figure 11 Sectional side view of the opened state of the range hood of the second embodiment of the present application. DETAILED DESCRIPTION

[0044] The present application will be further described in detail with reference to the following embodiments and the accompanying drawings.

[0045] In the description and claims of the present application, terms are used to generally refer to the structure of the application as well as the components of that structure. When the applications refer to directions, such as front, back, up, down, left, right, side, top, bottom, and the like, these terms are used for convenience and are illustrative only. Such terms reflect the relative position of an object as shown in the figures with regard to an example orientation, but human beings are accustomed to thinking in terms of directions and orientations when describing objects, and as such the terms are used herein for convenience and are not to be construed as limiting. For example, "up" and "down" are not necessarily limited to the gravitational orientation of the object.

[0046] Embodiment One

[0047] Figures 1-7An optimal embodiment of the range hood and the control method thereof is shown. The range hood comprises a casing 10 and a centrifugal fan 15 arranged in the casing 10. The casing 10 generally comprises a fan frame 11 and a smoke collecting hood 12 arranged at the bottom of the fan frame 11. The fan frame 11 and the smoke collecting hood 12 are connected, and the inner cavity of the fan frame 11 is communicated with the inner cavity of the smoke collecting hood 12. The front side wall of the smoke collecting hood 12 is provided with an air inlet, and external smoke gas can enter the smoke collecting hood 12 through the air inlet. The centrifugal fan is arranged in the fan frame 11, and the centrifugal fan generates negative pressure when operating, and external oil fume can be sucked into the smoke collecting hood 12 through the air inlet. The air inlet of the smoke collecting hood 12 is further provided with an oil screen for filtering oil fume. The bottom of the smoke collecting hood 12 is provided with an oil cup 16 extending leftward and rightward, which is used for receiving oil stains flowing down from the smoke collecting hood 12. The front part of the smoke collecting hood 12 is further provided with a smoke baffle 20 capable of deflecting forward and backward relative to the smoke collecting hood 12. The smoke baffle 20 is connected to the main body of the smoke collecting hood 12 through a smoke baffle movement mechanism 21, and specifically can deflect forward to open the above-mentioned air inlet and deflect backward to shield and close the above-mentioned air inlet. The smoke baffle movement mechanism 21 driving the smoke baffle 20 to deflect can adopt a conventional hinge movement mechanism in the prior art, which will not be described here. Generally, the smoke baffle 20 rotates along the first axis extending leftward and rightward, and the rotation center is located in the casing 10, so that the gap between the inner side of the smoke baffle 20 and the panel of the upper region of the air inlet 120 of the smoke collecting hood 12 will gradually decrease during the process of the smoke baffle 20 opening to a larger angle.

[0048] In the embodiment, the front side wall of the smoke collecting hood 12 is inclined backward from top to bottom, and the front side wall of the smoke collecting hood 12 is located in the upper region of the air inlet 120 and is marked as an installation wall 121. The installation wall 121 is provided with a panel, and the size of the panel is basically consistent with the size of the installation wall 121. The installation wall 121 and the panel are also inclined backward from top to bottom. The smoke baffle 20 is a strip-shaped plate extending leftward and rightward, and has a first side 201 adjacent to the first axis and a second side 202 away from the first axis.

[0049] The mounting wall 121 of the smoke hood 12 is further provided with a driving device. The driving device is a linear motion mechanism arranged on the mounting wall 121. The linear motion mechanism comprises a driving motor 41 and a screw rod 42 and a sliding block 43 assembly. An inner side wall of the mounting wall 121 is provided with a mounting plate 1210 extending in a direction substantially perpendicular to the mounting wall 121. The driving motor 41 is fixed on the mounting plate 1210. The screw rod 42 and the sliding block 43 assembly comprises the screw rod 42 and the sliding block 43. The screw rod 42 is connected in transmission with an output shaft of the driving motor 41 and can rotate around its own axis under the driving of the driving motor 41. The extending direction of the screw rod 42 is substantially perpendicular to the mounting wall 121. The panel comprises a panel body 131 and a panel support 132 attached to the back of the panel body 131. In order to ensure the aesthetic appearance, the panel body 131 is a glass plate. The sliding block 43 is arranged on a side of the panel support 132 away from the panel body 131 and is threadedly connected with the screw rod 42. When the driving motor 41 rotates in the forward and reverse directions, the smoke baffle 20 moves in a direction perpendicular to the mounting wall 121 under the driving of the screw rod 42 and the sliding block 43 assembly, so as to approach or move away from the first side edge 201 of the smoke baffle 20 in the open state. When the panel approaches the first side edge 201 of the smoke baffle 20, the gap between the panel and the first side edge 201 of the smoke baffle 20 becomes smaller or can be eliminated, which can effectively improve or avoid the problem of oil fume escaping therefrom.

[0050] The driving motor 41 is arranged on a side of the mounting wall 121 facing the inside of the cabinet 10. A first displacement opening 1211 is formed in the mounting wall 121 at a position corresponding to the sliding block 43. The sliding block 43 is arranged on the back of the panel. The opening size of the first displacement opening 1211 is large enough, so that the sliding block 43 can extend into the smoke hood 12 through the first displacement opening 1211. In this way, the panel can be as close as possible to the mounting wall 121 or be attached to the mounting wall 121 in the initial position. When the smoke baffle 20 is in the closed state, the protruding height of the front side of the smoke baffle 20 and the front side of the panel can be consistent, which ensures the overall aesthetic appearance and delicacy of the front part of the smoke hood 12.

[0051] A smoke isolation foam 14 which can be compressed and restored after the pressure is released is arranged between the panel and the mounting wall 121. The smoke isolation foam 14 is always in the filling state when the panel moves forward and backward relative to the mounting wall 121, which avoids the leakage of oil fume from the gap between the panel and the mounting wall 121. Preferably, the smoke isolation foam 14 can be arranged only in the left-right direction between the bottom edge of the panel and the bottom edge of the mounting wall 121.

[0052] The back of the panel support 132 is also provided with a flap 1321 extending towards the mounting wall 121, the extending direction of the flap 1321 is substantially perpendicular to the panel support 132, specifically, the flap 1321 can be formed by stamping the panel support 132. The flap 1321 has two, corresponding to the left and right sides of the back of the panel support 132. The mounting wall 121 is provided with a second displacement opening 1212 at a position corresponding to the two flaps 1321, and the bottom edge of the second displacement opening 1212 is also provided with a guide support plate 1213 extending towards the inside of the cabinet 10, the extending direction of the guide support plate 1213 is substantially perpendicular to the mounting wall 121, and the guide support plate 1213 can also be formed by stamping the mounting wall 121. The flap 1321 is also provided with a freely rotating roller 1322, the flap 1321 is located above the guide support plate 1213, when the panel moves forward and backward, the roller 1322 on the flap 1321 can be in rolling contact with the guide support plate 1213, thereby ensuring the stability of the panel movement.

[0053] The end position of the flap 1321 away from the panel is also provided with a limiting stop 1323, which is located on the side of the mounting wall 121 towards the inside of the cabinet 10, the limiting stop 1323 can limit the limit position of the outward movement of the panel, that is, when the panel moves outwardly a certain distance, the limiting stop 1323 on the flap 1321 can be in contact with the mounting wall 121, the outward movement of the panel is completed, thereby increasing the reliability and stability of the translational movement of the panel.

[0054] The first side edge 201 of the smoke baffle 20 is also provided with a bump stop pad. The bump stop pad can be made of a flexible material such as rubber, thereby ensuring the safety of the smoke baffle 20 and the panel. Further, the first side edge 201 of the smoke baffle 20 is also provided with a pressure sensor, wherein the pressure sensor, the driving device and the control system of the extractor hood are electrically connected, and the control system can control the driving device to stop acting when the pressure signal transmitted by the pressure sensor reaches a set value. Similarly, the smoke baffle moving mechanism 21 for driving the smoke baffle 20 to deflect, the pressure sensor and the control system of the extractor hood are also electrically connected, and the control system can control the smoke baffle moving mechanism 21 to stop acting when the pressure signal transmitted by the pressure sensor reaches a set value. After setting the pressure sensor on the back side of the smoke baffle 20, when the smoke baffle 20 is turned to the maximum angle and contacts the panel or the panel moves forward to the maximum distance and contacts the smoke baffle 20, the movement is stopped, thereby ensuring the safety of the smoke baffle 20 and the panel.

[0055] Generally, the moving process of the panel can be adjusted by the user through the control button, but the process is relatively cumbersome. Preferably, in the present embodiment, in order to automatically control the rotation of the smoke baffle 20 and / or the lifting of the panel and / or the lifting of the air volume gear according to the oil fume concentration on the front side and the back side of the smoke baffle 20, so as to effectively alleviate the problem of smoke running on the front side and the back side of the smoke baffle 20, the back side of the smoke baffle 20 is adjacent to the first side edge 201 and is provided with a first oil fume sensor 31, and the second side edge 202 is provided with a second oil fume sensor 32. The first oil fume sensor 31, the second oil fume sensor 32, the smoke plate movement mechanism 21 and the driving device are electrically connected with the control system of the extractor hood, so that the control system can control the smoke plate movement mechanism 21 to act to adjust the opening angle of the smoke baffle 20 and / or control the driving device to act to adjust the moving distance of the panel according to the oil fume concentration signals transmitted by the first oil fume sensor 31 and the second oil fume sensor 32.

[0056] Embodiment Two

[0057] Reference Figures 7-11 In the present embodiment, the smoke collecting hood 12 further comprises a back plate 122, a front plate 123 and a bottom portion 124, the bottom portion 124 is arranged between the back plate 122 and the front plate 123, the back plate 122 is located away from the user, and the front plate 123 is located close to the user. The back plate 122 and the front plate 123 can both extend upward and downward, and the bottom portion 124 extends downward and backward from front to back. The bottom portion 124 comprises a first portion 1241 and a second portion 1242, the second portion 1242 is provided with the above-mentioned air inlet 120, and the first portion 1241 is closer to the front plate 123 than the second portion 1242. The first portion 1241 corresponds to the position of the mounting wall 121 and the panel in the first embodiment, but there is no relative movement. The air inlet 120 has a side air inlet 1201 and a central air inlet 1202, the central air inlet 1202 is composed of a plurality of small holes arranged along the left-right direction of the extractor hood, and the side air inlet 1201 is located outside (left and right sides) of the central air inlet 1202, thereby preventing smoke from running on the left and right sides. The second portion 1242 can be provided with an oil screen 126, and the central air inlet 1202 is arranged on the oil screen 126.

[0058] The horizontal distance between the outer edge of the side air inlet 1201 and the corresponding side of the smoke collecting hood 12 (for example, the left side edge of the left side air inlet 1201 and the left side of the smoke collecting hood 12, and the right side is the same) is L, and L < 20 cm is satisfied. The transverse size (along the left-right direction of the extractor hood) of the side air inlet 1201 is M1, and the transverse size of the smoke collecting hood 12 is M2, and M1 / M2 ≥ 1 / 12 is satisfied. According to the usual arrangement position of the burner of the gas stove, when the above relationship is satisfied, the side air inlet 1201 can correspond to the outer side of the pot during use, thereby preventing smoke from running.

[0059] The area of the side air inlet 1201 (cross-sectional area along the thickness direction of the bottom 124 of the hood 12) is S1, and the area of the center air inlet 1202 (cross-sectional area along the thickness direction of the bottom 124 of the hood 12) is S2, 1 / 5.5≤S1 / S2≤1 / 4, so that the negative pressure distribution is more reasonable, and the smoke guiding effect is better.

[0060] The hood 12 also has side plates 125, two of which are arranged between the back plate 122, the front plate 123 and the left end of the bottom 124, and the other two are arranged between the back plate 122, the front plate 123 and the right end of the bottom 124. The side plates 125 do not overlap with the side air inlets 1201 in the vertical direction projection (i.e. projection on the horizontal plane), and in the embodiment, the left side plate 125 is located to the left of the left side air inlet 1201, and the right side plate 125 is located to the right of the right side air inlet 1201. Preferably, the side plates 125 are parallel to a vertical plane (which is perpendicular to the vertical plane S1 described below).

[0061] The centrifugal fan 15 is a double air inlet fan, having a front side air inlet channel 151 and a rear side air inlet channel 152. The centrifugal fan 15 has a center plane S in the longitudinal direction, which is perpendicular to the axis X of the centrifugal fan 15 and divides the centrifugal fan 15 into two equal parts along the axis X of the centrifugal fan 15. In the embodiment, the center plane S is a vertical plane. The center plane S passes through the second part 1242, so that when the oil fume enters the second part 1242, it can be distributed to the front side air inlet channel 151 and the rear side air inlet channel 152.

[0062] The smoke baffle 20 is arranged at the second part 1242, and has an open state and a closed state. In the open state, the smoke baffle 20 exposes the second part 1242, and in the closed state, the smoke baffle 20 covers the second part 1242. The smoke baffle 20 has a proximal end 203 and a distal end 204. In the closed state, the proximal end 203 is closer to the first part 1241. The position of the proximal end 203 in the open state is higher than that in the closed state. In the open state, the position of the proximal end 203 is higher than the position of the lower end of the first part 1241, so that part of the oil fume entering the first part 1241 changes direction, which can weaken the flow guiding effect of the smoke baffle 20, so that the oil fume enters the front side air inlet channel 151 and the rear side air inlet channel 152 more uniformly, and a larger smoke guiding range can be provided. In addition, compared with fixed shaft rotation, the lifting of the position of the proximal end 203 can reduce the obstruction of the line of sight when the same angle is opened.

[0063] In the open state of the smoke baffle 20, the position of the proximal end 203 is beyond the position of the lower end of the first portion 1241, thereby the proximal end 203 divides the first portion 1241 into an upper portion 12411 and a lower portion 12412, the size of the upper portion 12411 along the extending direction of the bottom 124 of the smoke hood 12 is L1, the size of the lower portion 12412 along the extending direction of the bottom 124 of the smoke hood 12 is L2, and 1 / 2≥L2 / L1≥1 / 5 is satisfied, too large will make the first portion 1241 prone to form oil stains, and within the above range, the flow guiding effect of the smoke baffle 20 can be effectively weakened, and the second portion 1242 can also remove the oil fume in the area between the smoke baffle 20 and the lower portion 12411 of the first portion 1241.

[0064] In the open state, the distal end 204 of the smoke baffle 20 is forward beyond the position of the front plate 123, that is, the projection of the distal end 204 on the horizontal plane is located on the front side of the front plate 123, thereby providing a larger smoke gathering range, and the position of the distal end 204 of the smoke baffle 20 is downward beyond the oil cup 16 in the height direction of the range hood and lower than the bottom of the oil cup 16. Since the range hood of the utility model is far away from the pot itself, the lower negative pressure area can be provided by such arrangement.

[0065] In the installed state, the second portion 1242 and the vertical plane S1 (parallel or coinciding with the above-mentioned central plane S) form an angle a, and in the open state of the smoke baffle 20, the line P connecting the distal end 204 and the bottom end of the first portion 1241 and the vertical plane form an angle b, the difference between a and b is not greater than 25 degrees, the second portion 1242 and the smoke baffle 20 provide a more close flow guiding effect, which is more conducive to the uniform entry of the oil fume into the front side air inlet channel 151 and the rear side air inlet channel 152, and effectively improves the oil fume suction efficiency.

[0066] The oil cup 16 is located on the bottom rear side of the smoke hood 12, and the second portion 1242 is formed between the oil cup 16 and the first portion 1241, the second portion 1242 has opposite first and second ends 12421 and 12422 in the longitudinal direction of the smoke hood 12, the first end 12421 is close to the oil cup 16, and the second end 12422 is close to the first portion 1241, the horizontal distance from the first end 12421 to the back plate 122 is d1, the depth dimension of the smoke hood 12 is d, and d1≥1 / 8d is satisfied, so as to ensure that the oil cup 16 has sufficient longitudinal space and the position of the first end 12421 is closer to the stove head position to avoid waste. The horizontal distance from the second end 12422 to the first end 12421 is d2, and d2≥2 / 5d is satisfied, so as to ensure that the longitudinal air inlet 120 has sufficient size to provide sufficient air inlet area.

Claims

1. A range hood, comprising: a housing (10) having an air inlet (120) formed in a front side wall thereof and a panel arranged in a region above the air inlet (120); a baffle (20) rotatably arranged on the housing (10) about a first axis extending leftward and rightward and capable of opening and closing the air inlet (120), the baffle (20) having a first side (201) adjacent to the first axis and a second side (202) away from the first axis; characterized in that a driving device is further arranged on the housing (10), a power output end of the driving device being connected to the panel so as to drive the panel to move close to or away from the first side (201) of the baffle (20) in an open state; the front side wall of the housing (10) in the region above the air inlet (120) is denoted as a mounting wall (121), the driving device is a linear motion mechanism arranged on the mounting wall (121), the baffle (20) is driven by the linear motion mechanism to move in a direction perpendicular to the mounting wall (121), the linear motion mechanism comprises a driving motor (41) and a screw rod (42) and slider (43) assembly, the screw rod (42) and slider (43) assembly comprises a screw rod (42) and a slider (43), the screw rod (42) is connected in transmission with an output shaft of the driving motor (41) and is capable of rotating about its own axis under the driving of the driving motor (41), the slider (43) is arranged on the panel and is threadedly connected with the screw rod (42); a smoke isolation foam (14) capable of being compressed and restored after the pressure is released is further arranged between the panel and the mounting wall (121).

2. A range hood, comprising: a fan frame (11) having a centrifugal fan (15) arranged therein; a smoke collecting hood (12) connected with the fan frame (11), the smoke collecting hood (12) comprising a back plate (122), a front plate (123) and a bottom (124), the bottom (124) being arranged between the front plate (123) and the back plate (122); the bottom (124) comprising a first portion (1241) and a second portion (1242), the second portion (1242) being provided with an air inlet (120), the first portion (1241) being closer to the front plate (123) than the second portion (1242); a baffle (20) being arranged at the second portion (1242), the baffle (20) having an open state and a closed state, in the open state, the baffle (20) exposes the second portion (1242), in the closed state, the baffle (20) covers the second portion (1242); characterized in that: the centrifugal fan (15) has a front side air inlet channel (151) and a rear side air inlet channel (152), the centrifugal fan (15) has a center plane (S) in a longitudinal direction, the center plane (S) is perpendicular to an axis (X) of the centrifugal fan (15), the center plane (S) passes through the second portion (1242). ​ The smoke baffle (20) has a proximal end (203) and a distal end (204), the proximal end (203) is closer to the first portion (1241) in the closed state, the position of the proximal end (203) in the open state is higher than that in the closed state, and the position of the proximal end (203) in the open state is higher than the bottom end of the first portion (1241). The bottom rear side of the smoke collecting cover (12) is provided with an oil cup (16), the second portion (1242) is formed between the oil cup (16) and the first portion (1241), along the longitudinal direction of the smoke collecting cover (12), the second portion (1242) has opposite first end (12421) and second end (12422), the first end (12421) is close to the oil cup (16), the horizontal distance from the first end (12421) to the back plate (122) is d1, the depth dimension of the smoke collecting cover (12) is d, and d1≥1 / 8d is satisfied, the horizontal distance from the second end (12422) to the first end (12421) is d2, and d2≥2 / 5d is satisfied. In the open state, the projection of the position of the distal end (204) of the smoke baffle (20) on the horizontal plane exceeds the position of the front plate (123) forwardly, and the position of the distal end (204) of the smoke baffle (20) in the height direction of the range hood exceeds the position of the bottom of the oil cup (16) downwardly.

3. The hood according to claim 2, characterized in that: The height of the smoke collecting cover (12) is H, and H≤250mm is satisfied.

4. The hood according to claim 2, characterized in that: In the open state, the proximal end (203) divides the first portion (1241) into an upper portion (12411) and a lower portion (12412), the size of the upper portion (12411) along the extension direction of the bottom (124) of the smoke collecting cover (12) is L1, the size of the lower portion (12412) along the extension direction of the bottom (124) of the smoke collecting cover (12) is L2, and 1 / 2≥L2 / L1≥1 / 5 is satisfied.

5. The hood according to claim 2, characterized in that: The angle between the second portion (1242) and the vertical plane (S1) is a, in the open state, the angle between the line (P) connecting the distal end (204) of the smoke baffle (20) and the bottom end of the first portion (1241) and the vertical plane (S1) is b, and the difference between a and b is not greater than 25 degrees.

6. The hood according to claim 2, characterized in that: The air inlet (120) has a side air inlet (1201) and a center air inlet (1202), the side air inlet (1201) is located outside the center air inlet (1202).

7. The hood according to claim 6, characterized in that: The horizontal distance between the outer edge of the side air inlet (1201) and the corresponding side of the smoke collecting cover (12) is L, and L<20cm is satisfied.

8. The hood according to claim 7, characterized in that: The transverse size of the side air inlet (1201) is M1, the transverse size of the smoke collecting cover (12) is M2, and M1 / M2≥1 / 12 is satisfied.

9. The hood according to any one of claims 6-8, characterized in that: Two side air inlets (1201) are arranged on both sides of the central air inlet (1202), the area of the side air inlets (1201) is S1, the area of the central air inlet (1202) is S2, and 1 / 5.5<=S1 / S2<=1 / 4 is satisfied.

10. The hood according to any one of claims 6-8, characterized in that: The smoke hood (12) further has a side plate (125), and a projection of the side plate (125) on a horizontal plane does not overlap with the side air inlets (1201).

11. The hood according to any one of claims 6-8, characterized in that: The second part (1242) is provided with an oil screen (126), and the central air inlet (1202) is arranged on the oil screen (126).

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