Range hood capable of distributing air volume

Abstract

The present invention relates to a range hood capable of distributing air volume, comprising a housing, the lower portion of the housing having a vertically extending smoke inlet chamber, a front side wall of the lower portion of the housing having a smoke inlet port connected to the smoke inlet chamber, and characterized in that: the smoke inlet port has a left portion and a right portion that are arranged side by side in the horizontal direction, and an adjustment structure capable of adjusting the opening size of the left portion and the right portion is provided at the smoke inlet port. When a single-sided burner is required, the opening of one side of the smoke inlet port can be increased and the opening of the other side can be reduced or closed by flipping the first baffle plate and the second baffle plate. When a double-sided burner is required, the openings of both sides of the smoke inlet port can be increased, thereby reasonably distributing the air volume according to needs, avoiding smoke leakage, and improving the smoke extraction effect.

Description

Technical Field

[0001] The invention relates to the technical field of kitchen appliances, and in particular to a range hood capable of distributing air volume. Background Art

[0002] Range hoods are an indispensable appliance in the kitchen today. The more common and widely used ones are the upper exhaust fume purification systems.

[0003] At present, the upper exhaust fume purification system is mainly divided into two categories: top suction range hood and close suction range hood. Top suction range hood is more beautiful, but its smoke inlet is higher and the smoke extraction effect is limited; compared with top suction range hood, close suction range hood has a lower smoke inlet, but due to the influence of the appearance structure and internal air duct structure of close suction range hood, the current close suction range hood cannot get closer to the smoke, which greatly limits its smoke extraction effect.

[0004] For existing Chinese kitchens, the stove usually has two burners arranged side by side. When cooking, one burner is used alone or both burners are used at the same time. Regardless of the usage status, the source of oil smoke is the position corresponding to the two burners, and the oil smoke concentration is relatively small at the position in the middle of the range hood. Most families will not use two burners at the same time for high heat stir-frying. In most cases, one burner is used for cooking (producing a lot of oil smoke) and the other burner is used for steaming (producing less oil smoke). With the existing range hood, since the air inlet and air volume of the range hood corresponding to the two burners are the same, it is easy to have the problem of untimely exhaust of oil smoke on one side, resulting in oil smoke escape.

[0005] In order to solve the above problems, the applicant's prior application "A Range Hood" (Application No.: 201920901581.4) discloses a structure in which a baffle assembly is provided in the smoke inlet chamber, which can divide the smoke inlet chamber into two relatively independent air inlet channels arranged on the left and right, and the baffle assembly is connected to an adjustment mechanism that can adjust the position of the baffle assembly to control the opening size of the two air inlet channels. The above-mentioned adjustment mechanism can adjust the opening of the air duct, thereby regulating the air volume on the air inlet side corresponding to the two burners to improve the oil fume extraction effect. At present, it is rare in the prior art to find a range hood that directly adjusts the air suction effect corresponding to a single-sided burner by adjusting the size of the air inlet corresponding to the burner. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a range hood capable of distributing air volume and capable of adjusting the size of a single-side air inlet according to needs so as to improve the fume extraction effect in view of the current status of the prior art.

[0007] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a range hood capable of distributing air volume, comprising a shell, the lower part of the shell having a vertically extending smoke inlet chamber, and the front side wall of the lower part of the shell having a smoke inlet port connected to the smoke inlet chamber, characterized in that: the smoke inlet has a left part and a right part side by side in the horizontal direction, and the smoke inlet is provided with an adjustment structure capable of adjusting the opening size of the left part and the right part.

[0008] In the above scheme, the adjustment structure at least includes a first baffle and a second baffle, which are arranged corresponding to the left and right parts of the smoke inlet respectively and whose lower edges are respectively connected to the lower edge of the smoke inlet by rotation, and an air inlet whose opening can be adjusted by the rotation of the baffle is formed between the upper edge of the first baffle, the upper edge of the second baffle and the upper edge of the corresponding smoke inlet. The opening of the air inlet above the first baffle and the second baffle is adjusted by flipping the first baffle and the second baffle, and the air volume of the fan corresponding to the left and right parts can be distributed, so as to adjust the air volume at the corresponding burner according to the use of the burner, avoid smoke leakage, and improve the oil fume absorption effect.

[0009] The lower part of the shell of the present invention has a vertically extending smoke inlet chamber, and the upper part of the shell has a smoke collecting chamber connected to the smoke inlet chamber. The smoke collecting chamber extends forward to form an installation chamber for installing a fan system, and the smoke inlet is opened on the front side wall of the lower part of the smoke inlet chamber. When the air inlet is open, the first baffle / the second baffle forms a guide plate that gradually tilts from bottom to top and from front to back. The first baffle and the second baffle of the present invention can cooperate with each other to achieve the air volume distribution of the left and right air inlets, and can also guide the oil smoke upward when the corresponding air inlet is in use; due to the vertical arrangement of the smoke inlet chamber of the present invention, the above structure is adopted, when the oil smoke enters the smoke inlet chamber, it can avoid the oil smoke from diffusing in the bottom area of ​​the smoke inlet chamber, thereby reducing the travel of the oil smoke at the bottom of the smoke inlet chamber and directly discharging it along the guide plate; at the same time, relative to the bending surface at the bottom of the smoke inlet chamber, the overall inclined surface structure of the guide plate can make the oil smoke flow more stably.

[0010] In the present invention, the adjustment structure further includes a driving mechanism capable of driving the first baffle and / or the second baffle to flip forward and backward so as to adjust the size of the left and / or right air inlet.

[0011] As a first implementation scheme of the driving mechanism, the driving mechanism includes an elastic member, a swing member and a driving member, the elastic member makes the first baffle and the second baffle always maintain a tendency to flip backwards, the swing member is rotatably arranged at the rear side of the first baffle and the second baffle, and the outer peripheral wall of the swing member is provided with a first lever arm and a second lever arm which can abut against the rear side wall of the first baffle and the second baffle as the swing member rotates, thereby pushing them to flip forward to overcome the elastic force of the elastic member, and the driving member is used to drive the swing member to rotate. The above structure is adopted to realize the front and rear flipping of the first baffle and the second baffle, and then realize the air volume distribution between the left and right parts.

[0012] Preferably, the swing member has a rotation axis arranged parallel to the first baffle plate and the second baffle plate, the first lever arm and the second lever arm are arranged at intervals along the axial direction of the rotation axis and extend radially, the first lever arm is arranged corresponding to the rear side wall of the first baffle plate, and the second lever arm is arranged corresponding to the rear side wall of the second baffle plate. In the circumferential direction of the swing member, an angle of 80° to 130° is formed between the first lever arm and the second lever arm. More preferably, an angle of 100° is formed between the first lever arm and the second lever arm. The above structure is conducive to adjusting and controlling the flip angles of the first baffle plate and the second baffle plate.

[0013] Preferably, the end of the first arm is provided with a first roller that can rotate with the rear side wall of the first baffle, and the end of the second arm is provided with a second roller that can rotate with the rear side wall of the second baffle. The above rollers can be made of soft materials such as silica gel and rubber, or covered with soft sleeves, which is conducive to reducing the friction between the driving mechanism and the first baffle and the second baffle, thereby reducing the sound when the arm contacts the baffle and reducing noise.

[0014] In the above scheme, the driving mechanism also includes a limiting member arranged beside the swinging member and used to limit the rotation angle of the swinging member. The limiting member is arranged close to the first lever arm. When the swinging member rotates to the state where the first lever arm pushes the first baffle to flip forward to the maximum angle, the first lever arm abuts against the first edge of the limiting member, and the second lever arm disengages from the second baffle so that the second baffle flips backward to the maximum angle; when the swinging member rotates to the state where the second lever arm pushes the second baffle to flip forward to the maximum angle, the first lever arm abuts against the second edge of the limiting member opposite to the first edge, and the first lever arm disengages from the first baffle so that the first baffle flips backward to the maximum angle. The above limiting member can limit the position of the lever arm, thereby limiting the baffle in a corresponding state, thereby improving the accuracy of the baffle flipping.

[0015] In order to facilitate the installation and assembly of the driving mechanism, the driving mechanism also includes a bracket for supporting the swinging member, which is constrained in the smoke inlet chamber and has a support arm extending toward the first baffle and the second baffle. The rotating shaft of the swinging member is rotatably connected to the support arm, and the driving member is arranged beside the bracket and the output shaft is connected to the rotating shaft.

[0016] Preferably, a first baffle extending backward is provided at the edge of the first baffle near the middle of the smoke inlet, and a first clearance opening for the rotation shaft to pass through is formed on the first baffle; a second baffle extending backward is provided at the edge of the second baffle near the middle of the smoke inlet, and a second clearance opening for the rotation shaft to pass through is formed on the second baffle. The bottom wall of the smoke inlet chamber forms an oil guide plate that gradually tilts from front to back and from bottom to top. When the first baffle / second baffle is flipped backward to the maximum angle, the rear edge of the first baffle / second baffle is arranged close to the rear side wall of the smoke inlet chamber, and the lower edge of the first baffle / second baffle is arranged close to the oil guide plate. With the above structure, when the burner is used independently, the above baffle can prevent the oil smoke from moving sideways in the smoke inlet chamber, thereby improving the air volume distribution effect, and shortening the oil smoke upward discharge stroke, thereby improving the oil smoke absorption effect.

[0017] In order to facilitate assembly and connection, a concave assembly plate is provided in the middle of the oil guide plate, and the bottom of the bracket is fixed on the assembly plate.

[0018] As a second implementation scheme of the driving mechanism, the driving mechanism includes an elastic member, a first swing member, a second swing member and a first driving member and a second driving member. The elastic member enables the first baffle and the second baffle to always maintain a tendency to flip backwards. The first swing member and the second swing member are respectively rotatably arranged on the rear sides of the first baffle and the second baffle. A first lever arm is arranged on the outer peripheral wall of the first swing member, which can abut against the rear side wall of the first baffle as the first swing member rotates, thereby pushing it to flip forward by overcoming the elastic force of the elastic member. A second lever arm is arranged on the outer peripheral wall of the second swing member, which can abut against the rear side wall of the second baffle as the swing member rotates, thereby pushing it to flip forward by overcoming the elastic force of the elastic member. The first driving member is used to drive the first swing member to rotate, and the second driving member is used to drive the second swing member to rotate.

[0019] Preferably, the first swing member has a first rotation axis arranged parallel to the first baffle, and the first lever arm extends radially along the first rotation axis; the second swing member has a second rotation axis arranged parallel to the second baffle, and the second lever arm extends radially along the second rotation axis.

[0020] As a third implementation scheme of the driving mechanism, the driving mechanism includes a swinging member, a first telescopic member, a second telescopic member and a driving member, the swinging member is rotatably arranged on the rear sides of the first baffle and the second baffle, the first end of the first telescopic member is rotatably connected to the swinging member, and the second end is rotatably connected to the first baffle, the first telescopic member has a contraction tendency and can be stretched under stress, the first end of the second telescopic member is rotatably connected to the swinging member, and the second end is rotatably connected to the second baffle, the second telescopic member has a contraction tendency and can be stretched under stress, and the driving member is used to drive the swinging member to rotate.

[0021] Preferably, the swing member has a first swing arm and a second swing arm extending radially respectively, the first swing arm and the second swing arm are arranged at an obtuse angle, the first end of the first telescopic member is rotatably connected to the first swing arm, and the first end of the second telescopic member is rotatably connected to the second swing arm.

[0022] Preferably, the first telescopic member and the second telescopic member have the same structure and both have a spring that can keep them in a contraction trend. The first telescopic member / the second telescopic member comprises a sleeve, an inner column and the spring, the first end of the sleeve has a first hinged portion, the second end has an opening for the inner column to pass through, the inner column can be extended and retracted along the axial direction of the sleeve, the first end is constrained on the sleeve, and the second end has a second hinged portion. The above structure is convenient for cooperating with the swinging member to drive the first baffle and the second baffle to flip forward and backward.

[0023] Preferably, the first end of the inner column has a first retaining ring arranged along the circumferential direction, and correspondingly, the opening of the second end of the sleeve has a second retaining ring that can abut against the first retaining ring to prevent the inner column from escaping from the sleeve. Preferably, the spring is arranged in the sleeve and sleeved on the outer circumference of the inner column, and the first end of the spring abuts against the first retaining ring, and the second end abuts against the second retaining ring, so as to improve assembly stability.

[0024] Preferably, the driving member is a motor, the output shaft of which is connected to the swinging member, and a position switch is provided on the rear wall of the smoke inlet chamber, which can control whether the motor is running when the first baffle and the second baffle are flipped backward to the maximum opening of the air inlet. There are two position switches, which are arranged corresponding to the first baffle and the second baffle respectively. When the first baffle and / or the second baffle are flipped backward to the maximum angle, the first baffle and / or the second baffle abut against the corresponding position switch, thereby sending a signal to stop the corresponding motor from running.

[0025] As a fourth implementation scheme of the driving mechanism, the driving mechanism includes an elastic member, a wheel disc, a first push rod, a second push rod and a driving member. The elastic member enables the first baffle and the second baffle to always maintain a tendency to flip backwards. The wheel disc is rotatably arranged on the rear side of the first baffle and the second baffle. The first end of the first push rod is rotatably connected to the wheel disc, and the second end is rotatably connected to the first baffle. The first end of the second push rod is rotatably connected to the wheel disc, and the second end is rotatably connected to the second baffle. The driving member is used to drive the wheel disc to rotate.

[0026] Preferably, the wheel disc is provided with a first slide groove and a second slide groove extending in the circumferential direction, the first slide groove and the second slide groove are close to each other and arranged in an interlaced manner, the first end of the first push rod can be constrained in the first slide groove by reciprocating sliding, and the first end of the second push rod can be constrained in the second slide groove by reciprocating sliding. Further preferably, the first slide groove and the second slide groove are both arc-shaped, and the corresponding central angles thereof are 45° to 85°. The above structure allows the first push rod and the second push rod to slide in the circumferential direction of the wheel disc, thereby realizing the control of the rotation angles of the first baffle and the second baffle.

[0027] In this scheme, when both the first baffle and the second baffle are flipped backward to the maximum angle, the first end of the first push rod is located at the end of the first slide groove that is away from the second slide groove, and the first end of the second push rod is located at the end of the second slide groove that is away from the first slide groove; when the first baffle is flipped forward to the maximum angle and the second baffle is flipped backward to the maximum angle, the first end of the first push rod is located at the end of the first slide groove that is away from the second slide groove, and the first end of the second push rod is located at the end of the second slide groove that is close to the first slide groove; when the first baffle is flipped backward to the maximum angle and the second baffle is flipped forward to the maximum angle, the first end of the first push rod is located at the end of the first slide groove that is close to the second slide groove, and the first end of the second push rod is located at the end of the second slide groove that is away from the first slide groove. The above-mentioned matching method can realize the reasonable distribution of the air volume of the side fan used by the corresponding burner under different burner use states, thereby improving the oil fume absorption effect.

[0028] Preferably, the wheel disc comprises a shaft located at the center and a first disc and a second disc arranged at intervals on the shaft, the first disc and the second disc rotate synchronously with the shaft, the first slide groove is provided on the first disc, and the second slide groove is provided on the second disc. The above structure is convenient for production and assembly.

[0029] Compared with the prior art, the advantage of the present invention is that an adjustment structure is provided at the smoke inlet for adjusting the opening size of the left and right parts of the smoke inlet, and the adjustment structure includes a first baffle and a second baffle that can be flipped forward and backward. When a single-sided burner is needed, the opening on one side of the smoke inlet can be increased and the opening on the other side can be reduced or closed by flipping the first baffle and the second baffle. When a double-sided burner is needed, the openings on both sides of the smoke inlet can be opened wide, thereby reasonably distributing the air volume according to needs, avoiding smoke leakage, and improving the fume absorption effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention (the opening degrees of the left and right air inlets are in different states);

[0031] Figure 2 This is a schematic diagram of the structure of Embodiment 1 of the present invention (the openings of the left and right air inlets are both in the maximum state);

[0032] Figure 3 It is a cross-sectional view of Embodiment 1 of the present invention (the opening degrees of the left and right air inlets are different);

[0033] Figure 4 It is a schematic diagram of the partial structure of the regulating structure in Example 1 of the present invention (left closed and right open state);

[0034] Figure 5 for Figure 4 A schematic diagram of the structure from another angle;

[0035] Figure 6 Schematic diagram of the structure of the driving mechanism in Example 1 of the present invention (left closed and right open state);

[0036] Figure 7 Schematic diagram of the structure of the swing member in Example 1 of the present invention;

[0037] Figure 8 for Figure 7 Side view of

[0038] Fig. 9 Schematic diagram of the structure of the driving mechanism in Example 1 of the present invention (left-opening and right-opening state);

[0039] Fig.10 Schematic diagram of the structure of the driving mechanism in Example 1 of the present invention (left open and right closed state);

[0040] Fig.11 Schematic diagram of the partial structure of the adjustment structure in Example 2 of the present invention (the openings of the left and right air inlets are both in the maximum state);

[0041] Fig.12 Schematic diagram of the structure of the driving mechanism in Example 2 of the present invention (left-opening and right-opening state);

[0042] Fig.13 Schematic diagram of the structure of the driving mechanism in Example 2 of the present invention (left closed and right open state);

[0043] Fig.14 Schematic diagram of the structure of the driving mechanism in Example 2 of the present invention (left open and right closed state);

[0044] Fig.15 Schematic diagram of the structure of the swing member in Example 2 of the present invention;

[0045] Fig.16 It is a cross-sectional view of Embodiment 3 of the present invention (the openings of the left and right air inlets are both at the maximum state);

[0046] Fig.17 Schematic diagram of the partial structure of the adjustment structure in Example 3 of the present invention (the openings of the left and right air inlets are both in the maximum state);

[0047] Fig.18 It is a partial structural schematic diagram of the adjustment structure in Example 3 of the present invention (left open and right closed state);

[0048] Fig.19 It is a partial structural schematic diagram of the adjustment structure in Example 3 of the present invention (left closed and right open state);

[0049] Fig. 20 It is a partial structural schematic diagram of the adjustment structure in Example 3 of the present invention (left-open and right-open states);

[0050] Fig.21 Schematic diagram of the structure of the first telescopic member / the second telescopic member in Embodiment 3 of the present invention;

[0051] Fig. 22 for Fig.21 A cross-sectional view of

[0052] Fig.23 Schematic diagram of the structure of the swing member in Embodiment 3 of the present invention;

[0053] Fig.24 for Fig.23 Side view of

[0054] Fig.25 It is a cross-sectional view of Embodiment 4 of the present invention (the opening degrees of the left and right air inlets are different);

[0055] Fig.26 It is a schematic diagram of the partial structure of the adjustment structure in Example 4 of the present invention (the opening degrees of the left and right air inlets are in different states);

[0056] Fig. 27 It is a partial structural schematic diagram of the adjustment structure in Example 4 of the present invention (left open and right closed state);

[0057] Fig.28 It is a partial structural schematic diagram of the regulating structure in Example 4 of the present invention (left closed and right open state);

[0058] Fig.29 It is a partial structural schematic diagram of the adjustment structure in Example 4 of the present invention (left-open and right-open states);

[0059] Fig.30 It is a side view of the roulette wheel in embodiment 4 of the present invention. DETAILED DESCRIPTION

[0060] The present invention is further described in detail below with reference to the accompanying drawings.

[0061] Embodiment 1:

[0062] like Figures 1 to 10 As shown in FIG. 1 , the range hood capable of distributing air volume in this embodiment comprises a housing 1 and a fan system arranged in the housing 1. The lower part of the housing 1 has a vertically extending smoke inlet cavity 11, and the front side wall of the lower part of the housing 1 has a smoke inlet port 111 connected to the smoke inlet cavity 11. Figure 3 As shown, the upper part of the housing 1 has a smoke collecting chamber 12 connected to the smoke inlet chamber 11, and the smoke collecting chamber 12 extends forward to form an installation chamber 13 for installing a fan system. It should be noted that the installation chamber 13 is used to install the fan system, but the installation position of the fan system should not be completely limited to the installation chamber 13. Since the smoke collecting chamber 12 and the installation chamber 13 are an integral whole, when installing the fan system, part of the fan system can also be located in the smoke collecting chamber 12 according to needs. Since the smoke inlet chamber 11 at the lower part of the housing 1 extends vertically, the width of the smoke inlet chamber 11 in the front-to-back direction can be made thinner, and can extend downward to be sufficiently close to the stove and the source of oil smoke, so that the oil smoke is quickly sucked into the upper row of the smoke inlet chamber as soon as it is generated, thereby improving the oil smoke absorption effect.

[0063] like Figure 2 As shown, the smoke inlet 111 of this embodiment has a left part 11a and a right part 11b which are arranged side by side in the horizontal direction. An adjustment structure 2 capable of adjusting the opening size of the left part 11a and the right part 11b is provided at the smoke inlet 111. The adjustment structure 2 comprises a first baffle 21, a second baffle 22 and a driving mechanism 23. The first baffle 21 and the second baffle 22 are arranged corresponding to the left part 11a and the right part 11b of the smoke inlet 111 respectively. The lower edges of the first baffle 21 and the second baffle 22 are rotatably connected to the lower edge of the smoke inlet 111 through the matching structure of the shaft 100a and the shaft hole 100b respectively. An air inlet 110 capable of adjusting the opening due to the rotation of the baffle is formed between the upper edge of the first baffle 21, the upper edge of the second baffle 22 and the corresponding upper edge of the smoke inlet 111. The driving mechanism 23 is used to drive the first baffle 21 and the second baffle 22 to flip forward and backward so as to adjust the opening size of the air inlet 110 corresponding to the left part 11a and the right part 11a.

[0064] When the air inlet 110 is open, the first baffle 21 / the second baffle 22 of this embodiment forms a guide plate that gradually tilts from bottom to top and from front to back. The first baffle 21 and the second baffle 22 of this embodiment can cooperate with each other to achieve the air volume distribution of the left and right air inlets 110, and can also guide the oil smoke upward when the corresponding air inlet 110 is in use; because the smoke inlet chamber 11 of this embodiment is arranged vertically, the above structure is adopted, when the oil smoke enters the smoke inlet chamber 11, it can avoid the oil smoke from diffusing in the bottom area of ​​the smoke inlet chamber 11, thereby reducing the travel of the oil smoke at the bottom of the smoke inlet chamber 11 and directly discharging along the guide plate; at the same time, relative to the bending surface at the bottom of the smoke inlet chamber 11, the overall inclined surface structure of the guide plate can make the oil smoke flow more stably.

[0065] Specifically, Figure 4 , 5 As shown in Figures 6 and 7, the driving mechanism 23 includes an elastic member 231, a swing member 232 and a driving member 233. The elastic member 231 is a linear spring, and there are two of the linear springs, which are arranged corresponding to the first baffle 21 and the second baffle 22, respectively, so that the first baffle 21 and the second baffle 22 always maintain a tendency to flip backwards. The upper end of the linear spring is fixed to the rear side wall of the lower part of the first baffle 21 / the second baffle 22, and the lower end of the linear spring is fixed to the bottom of the housing 1 and is located at a position slightly behind the smoke inlet 111. The swing member 232 is rotatably arranged at the rear side of the first baffle 21 and the second baffle 22. The outer peripheral wall of the swing member 232 is provided with a first lever arm 2321 and a second lever arm 2322 that can abut against the rear side wall of the first baffle 21 and the second baffle 22 as the swing member 232 rotates, thereby pushing them to flip forward to overcome the elastic force of the elastic member 231. The driving member 233 is used to drive the swing member 232 to rotate. The structure of the driving mechanism 23 facilitates the front-to-back flipping of the first baffle 21 and the second baffle 22, thereby achieving air volume distribution between the left portion 11a and the right portion 11b.

[0066] The swing member 232 has a rotation axis 2323 arranged parallel to the first baffle plate 21 and the second baffle plate 22. Figure 7 , 8 As shown, the first lever arm 2321 and the second lever arm 2322 are arranged at intervals along the axial direction of the rotating shaft 2323 and extend radially. The first lever arm 2321 is arranged corresponding to the rear side wall of the first baffle 21, and the second lever arm 2322 is arranged corresponding to the rear side wall of the second baffle 22. In the circumferential direction of the swinging member 232, an angle a of 80° to 130° is formed between the first lever arm 2321 and the second lever arm 2322, and the angle a is preferably 100°. Such a structure is conducive to adjusting and controlling the flip angles of the first baffle 21 and the second baffle 22.

[0067] The end of the first lever arm 2321 is provided with a first roller 200 that can rotate with the rear side wall of the first baffle 21, and the end of the second lever arm 2322 is provided with a second roller 300 that can rotate with the rear side wall of the second baffle 22. The rollers can be made of soft materials such as silica gel and rubber, or covered with soft sleeves, which is conducive to reducing the friction between the driving mechanism 23 and the first baffle 21 and the second baffle 22, thereby reducing the sound when the lever arm contacts the baffles and reduces noise.

[0068] The driving mechanism 23 of this embodiment also includes a limiting member 234 arranged on the side of the swinging member 232 and used to limit the rotation angle of the swinging member 232. The limiting member 234 is arranged close to the first lever arm 2321. When the swinging member 232 rotates to the state where the first lever arm 2321 pushes the first baffle 21 to flip forward to the maximum angle, the first lever arm 2321 abuts against the first edge 2341 of the limiting member 234, and the second lever arm 2322 disengages from the second baffle 22, thereby flipping the second baffle 22 backward to the maximum angle; when the swinging member 232 rotates to the state where the second lever arm 2322 pushes the second baffle 22 to flip forward to the maximum angle, the first lever arm 2321 abuts against the second edge 2342 of the limiting member 234 opposite to the first edge 2341, and the first lever arm 2321 disengages from the first baffle 21, thereby flipping the first baffle 21 backward to the maximum angle. The limiting member 234 can limit the position of the lever arm, thereby limiting the baffle in a corresponding state, thereby improving the accuracy of the baffle flipping.

[0069] In order to facilitate the installation and assembly of the driving mechanism 23, the driving mechanism 23 also includes a bracket 235 for supporting the swinging member 232. The bracket 235 is constrained in the smoke inlet chamber 11 and has a support arm 2351 extending toward the first baffle 21 and the second baffle 22. The rotating shaft 2323 of the swinging member 232 is rotatably connected to the support arm 2351. The driving member 233 is a motor capable of forward and reverse rotation. It is arranged beside the bracket 235 and the output shaft is connected to the rotating shaft 2323. Figure 5 As shown, a first baffle 211 extending backwards is provided at an edge of the first baffle 21 close to the middle of the smoke inlet 111, and a first clearance opening 2111 is opened on the first baffle 211 for the rotation shaft 2323 to pass through; a second baffle 221 extending backwards is provided at an edge of the second baffle 22 close to the middle of the smoke inlet 111, and a second clearance opening 2211 is opened on the second baffle 221 for the rotation shaft 2323 to pass through.

[0070] In this embodiment, the bottom wall of the smoke inlet chamber 11 forms an oil guide plate 112 which is gradually inclined from front to back and from bottom to top. When the first baffle 21 / the second baffle 22 is flipped backward to the maximum angle, the rear edge of the first baffle 21 / the second baffle 22 is arranged close to the rear side wall of the smoke inlet chamber 11, and the lower edge of the first baffle 21 / the second baffle 22 is arranged close to the oil guide plate 112. With the above structure, when the burner is used independently, the baffle can prevent the oil smoke from moving sideways in the smoke inlet chamber 11, thereby improving the air volume distribution effect, shortening the oil smoke upper discharge stroke, and further improving the oil smoke absorption effect. In order to facilitate assembly and connection, a concave assembly plate 113 is provided in the middle of the oil guide plate 112, and the bottom of the bracket 234 is fixed on the assembly plate 113.

[0071] When the range hood of this embodiment is used alone and the left burner is not used, the motor drives the swinging member 232 to rotate, so that the second lever arm 2322 pushes the second baffle plate 22 to flip forward to the maximum angle, and the air inlet 110 of the right part 11b is roughly closed. At this time, the first lever arm 2321 abuts against the second edge 2342 (rear edge) of the stopper 234, and the first lever arm 2321 does not contact the first baffle plate 21. The first baffle plate 21 keeps flipping backward under the action of its elastic member 231, so that the opening of the air inlet 110 of the left part 11a reaches the maximum.

[0072] When the right burner is used alone without using the left burner, the motor rotates in the reverse direction to drive the swing member 232 to rotate, so that the first arm 2321 rotates. When the end of the first arm 2321 contacts the first baffle 21, it starts to drive the first baffle 21 to flip forward until it flips to the maximum angle, and the air inlet 110 of the left part 11a is roughly closed. At this time, the first arm 2321 abuts against the first edge 2341 (front edge) of the limit member 234, and the second arm 2322 does not contact the second baffle 22. The second baffle 22 keeps flipping backward under the action of its elastic member 231, so that the opening of the air inlet 110 of the right part 11b reaches the maximum.

[0073] When the two burners need to be used at the same time, the motor rotates until the swing member 232 is located at the rear side of the limit member 234. At this time, the first lever arm 2321 does not contact the first baffle 21, and the second lever arm 2322 does not contact the second baffle 22. The first baffle 21 and the second baffle 22 are respectively kept flipped backwards under the action of their elastic members 231 so that the opening of the air inlet 110 of the left part 11a and the right part 11b reaches the maximum.

[0074] It should be noted that, for the sake of convenience, the above adjustment process of this embodiment shows the left-open and right-closed, left-closed and right-open, and left-open and right-open states, but the adjustment structure of the present invention should also be able to realize the half-open state of the air inlet on either side as needed, and is not limited to the fully open or fully closed state. For example, the present invention can make the first baffle flip forward to the maximum angle state, and leave a gap of about 20mm between the upper edge of the first baffle and the upper edge of the smoke inlet. In this way, when the second baffle flips backward to the maximum angle state, the main air volume of the fan is concentrated at the air inlet corresponding to the second baffle, but the air volume of the fan corresponding to the first baffle can also meet the inhalation requirements of water vapor or other small oil smoke such as steaming dishes and boiling soup, thereby providing greater convenience for consumers.

[0075] Embodiment 2:

[0076] The difference between this embodiment and embodiment 1 is that this embodiment adopts dual motor drive, and accordingly, this embodiment sets the swing member as a single arm structure.

[0077] Specifically, Figures 11 to 15 As shown, the two swing members 231a of this embodiment are not linked, and a limit member 234a is respectively provided on the side of the two swing members 231a. The two limit members 234a are both located at the top of the adjustment structure 2a, and are used to limit the flipping position of the corresponding lever arm 2311a when the rotating shaft 2312a rotates, thereby limiting the first baffle 21a and the second baffle 22a when they flip forward from the maximum angle state.

[0078] Embodiment 3:

[0079] The difference between this embodiment and embodiments 1 and 2 is that the structure of the driving mechanism is different.

[0080] Specifically, Figures 16 to 24 As shown, the driving mechanism 23b of this embodiment includes a swinging member 23b', a driving member 24b, and a telescopic structure 25b. The telescopic structure 25b includes a first telescopic member 251b and a second telescopic member 252b. The swinging member 23b' is rotatably arranged at the rear of the first baffle 21b and the second baffle 22b. The first end of the first telescopic member 251b is rotatably connected to the swinging member 23b' and the second end is rotatably connected to the first baffle 21b. The first telescopic member 251b has a contraction trend and can be stretched under stress. The first end of the second telescopic member 252b is rotatably connected to the swinging member 23b' and the second end is rotatably connected to the second baffle 22b. The second telescopic member 252b has a contraction trend and can be stretched under stress. The driving member 24b is used to drive the swinging member 23b' to rotate. The above structure is adopted to realize the front and back flipping of the first baffle 21b and the second baffle 22b, thereby realizing the air volume distribution of the left part 11a and the right part 11b.

[0081] The swing member 23b' has a rotation axis 231b arranged parallel to the first baffle plate 21b and the second baffle plate 22b, and a first swing arm 232b and a second swing arm 233b extending radially on the rotation axis 231b, respectively. The first swing arm 232b and the second swing arm 233b are arranged at an obtuse angle a' of 120° to 160°, and the obtuse angle a' is preferably 135° to 145°. The first end of the first telescopic member 251b is rotatably connected to the first swing arm 232b, and the first end of the second telescopic member 252b is rotatably connected to the second swing arm 233b. The first swing arm 232b and the second swing arm 233b at a specific angle can cooperate with the first telescopic member 251b and the second telescopic member 252b to realize the control of the rotation angle of the first baffle plate 21b and the second baffle plate 22b.

[0082] The first telescopic member 251b and the second telescopic member 252b of this embodiment have the same structure and both have a spring 250 that can keep them in a contraction trend. Specifically, the first telescopic member 251b / the second telescopic member 252b includes a sleeve 2511, an inner column 2512 and a spring 250, the first end of the sleeve 2511 has a first hinged portion 2511a for rotational connection of the baffle, and the second end has an opening 2511b for the inner column 2512 to pass through, the inner column 2512 can be axially telescopic along the sleeve 2511 and is arranged in the sleeve 2511, and the first end is constrained on the sleeve 2511, and the second end has a second hinged portion 2512a for rotational connection with the swing arm. The above structure is convenient for cooperating with the swing member 23b' to drive the first baffle 21b and the second baffle 22b to flip forward and backward. The first end of the inner column 2512 has a first retaining ring 2512b arranged along the circumferential direction, and correspondingly, the opening 2511b at the second end of the sleeve 2511 has a second retaining ring 2511c that can abut against the first retaining ring 2512b to prevent the inner column 2512 from being separated from the sleeve 2511. The spring 250 is disposed in the sleeve 2511 and sleeved on the outer circumference of the inner column 2512, and the first end of the spring 250 abuts against the first retaining ring 2512b, and the second end abuts against the second retaining ring 2511c.

[0083] The driving member 24b is a motor capable of forward and reverse rotation, and the output shaft of the motor is connected to the rotating shaft 231b of the swing member 23b'. A position switch 3b is provided on the rear wall of the smoke inlet chamber 11b, which can control whether the motor is running or not when the first baffle 21b and the second baffle 22b are flipped backward to the maximum opening state of the air inlet 110. There are two position switches 3b, which are arranged corresponding to the first baffle 21b and the second baffle 22b respectively. When the first baffle 21b and / or the second baffle 22b are flipped backward to the maximum angle, the first baffle 21b and / or the second baffle 22b abut against the corresponding position switch 3b, thereby sending a signal to stop the corresponding motor from running.

[0084] When the range hood of this embodiment is used, the left burner is used alone without using the right burner. Fig.18 As shown, the motor rotates to drive the swing member 23b' to rotate, so that the first swing arm 232b extends upward and backward, and the second swing arm 233b extends forward. At this time, the first telescopic member 251b is in a stretched state and pulls the first baffle 21b backward to flip the first baffle 21b backward to the maximum angle, and the second telescopic member 252b is in a compressed state and pushes the second baffle 22b to flip forward to the maximum angle, so that the opening of the left air inlet 11a reaches the maximum and the air inlet of the right part 11b is closed; the top edge of the first baffle 21b abuts against its corresponding position switch 3b, so that the motor stops running;

[0085] When using the right burner alone without using the left burner, Fig.19 As shown, the motor rotates to drive the swing member 23b' to react, so that the first swing arm 232b extends toward the front and upper direction, and the second swing arm 233b extends toward the rear and lower direction. At this time, the second telescopic member 252b is in a stretched state and pulls the second baffle 22b backward to flip the second baffle 22b backward to the maximum angle. The first telescopic member 251b is in a compressed state and pushes the first baffle 21b to flip forward to the maximum angle, so that the right air inlet 11b is opened to the maximum and the left air inlet 11a is closed; the top edge of the second baffle 22b abuts against its corresponding position switch 3b, so that the motor stops running;

[0086] When two burners need to be used at the same time, Fig. 20 As shown, the motor rotates to drive the swing member 23b' to rotate, so that the first swing arm 232b extends upward and the second swing arm 233b extends downward. At this time, the second telescopic member 252b is in a compressed state and uses the force of the spring to pull the second baffle 22b backward to flip the second baffle 22b backward to the maximum angle. The first telescopic member 251b is also in a compressed state and uses the force of the spring to pull the first baffle 21b backward to flip the first baffle 21b backward to the maximum angle; the top edges of the first baffle 21b and the second baffle 22b respectively abut against their corresponding position switches 3b, causing the motor to stop running.

[0087] Embodiment 4:

[0088] The difference between this embodiment and embodiments 1, 2 and 3 is that the structure of the driving mechanism is different.

[0089] Specifically, Figures 25-30As shown, the driving mechanism 23c of this embodiment includes an elastic member 231c, a wheel 232c, a first push rod 233c, a second push rod 234c and a driving member 235c. The elastic member 231c is a linear spring. There are two linear springs, which are arranged respectively corresponding to the first baffle 21c and the second baffle 22c, so that the first baffle 21c and the second baffle 22c always maintain a tendency to flip backwards. The upper end of the linear spring is fixed to the rear side wall of the lower part of the first baffle 21c / the second baffle 22c, and the lower end of the linear spring is fixed to the bottom of the housing 1c and is located at a position slightly behind the smoke inlet 111c. The wheel 232c is rotatably disposed at the rear side of the first baffle 21c and the second baffle 22c, the first end of the first push rod 233c is rotatably connected to the wheel 232c, and the second end is rotatably connected to the first baffle 21c, the first end of the second push rod 234c is rotatably connected to the wheel 232c, and the second end is rotatably connected to the second baffle 22c, and the driving member 235c is used to drive the wheel 232c to rotate.

[0090] Specifically, the wheel disc 232c is provided with a first slide groove 2321c and a second slide groove 2322c extending in the circumferential direction. The first slide groove 2321c and the second slide groove 2322c are close to each other and arranged alternately. The first end of the first push rod 233c is constrained in the first slide groove 2321c by a rotating shaft so as to be reciprocatingly slidable. The first end of the second push rod 234c is constrained in the second slide groove 2322c by a rotating shaft so as to be reciprocatingly slidable. In this embodiment, the first slide groove 2321c and the second slide groove 2322c are both arc-shaped, and the corresponding central angle a" is 50° to 85°, preferably 70° to 80°. The above structure allows the first push rod 233c and the second push rod 234c to slide in the circumferential direction of the wheel disc 232c, thereby realizing the control of the rotation angle of the first baffle 21c and the second baffle 22c.

[0091] The wheel disc 232c of this embodiment includes a shaft 2320 located at the center and a first disc 232a and a second disc 232b arranged at intervals on the shaft 2320. The first disc 232a and the second disc 232b rotate synchronously with the shaft 2320. The first slide groove 2321c is provided on the first disc 232a, and the second slide groove 2322c is provided on the second disc 232b. From the side of the wheel disc 232c, the first slide groove 2321c and the second slide groove 2322c are arranged adjacent to each other in the circumferential direction and there is no overlap between the two.

[0092] The driving member 235c of this embodiment is a motor capable of forward and reverse rotation, the output shaft of which is connected to the shaft 2320 of the wheel 232c, and a position switch 3c is provided on the rear wall of the smoke inlet chamber 11c, which can control whether the motor is running or not when the first baffle 21c and the second baffle 22c are flipped backward to the maximum opening state of the air inlet 110. There are two position switches 3c, which are arranged corresponding to the first baffle 21c and the second baffle 22c, respectively. When the first baffle 21c and / or the second baffle 22c are flipped backward to the maximum angle, the first baffle 21c and / or the second baffle 22c abut against the corresponding position switch 3c, thereby sending a signal to stop the corresponding motor from running.

[0093] When the range hood of this embodiment is used, the left burner is used alone without using the right burner. Fig. 27 As shown, the motor rotates to drive the wheel disc 232c to rotate, so that the first slide slot 2321c is located at the rear side of the top of the wheel disc 232c, and the second slide slot 2322c is located at the front side of the top of the wheel disc 232c, and the first end of the first push rod 233c is located at the end (front end) of the first slide slot 2321 close to the second slide slot 2322c, and the elastic member 231c pulls the first baffle plate 21c backward to make the first baffle plate 21c flip backward to the left part 11a The air inlet opening reaches the maximum, the first end of the second push rod 234c is located at the end (front end) of the second slide slot 2322c that is away from the first slide slot 2321c, and the second end of the second push rod 234c pushes the second baffle plate 22c to flip forward to the right part 11b The air inlet is closed; the top edge of the first baffle plate 21c abuts against its corresponding position switch 3c, so that the motor stops running;

[0094] When using the right burner alone without using the left burner, Fig.28 As shown, the motor rotates to drive the wheel disc 232c to rotate, so that the first slide slot 2321c is located at the front side of the wheel disc 232c, and the second slide slot 2322c is located at the lower part of the front side of the wheel disc 232c, the first end of the first push rod 233c is located at the end (upper end) of the first slide slot 2321c that is away from the second slide slot 2322c, and the second end of the first push rod 233c pushes the first baffle plate 21c to flip forward until the air inlet 11a on the left is closed, the first end of the second push rod 234c is located at the end (upper end) of the second slide slot 2322c that is close to the first slide slot 2321c, and the elastic member 231c pulls the second baffle plate 22c backward to flip the second baffle plate 22c backward until the air inlet opening of the right part 11b reaches the maximum; the top edge of the second baffle plate 22c abuts against its corresponding position switch 3, so that the motor stops running;

[0095] When two burners need to be used at the same time, Fig.29As shown, the motor rotates to drive the wheel 232c to rotate, so that the first slide slot 2321c is located on the front side of the top of the wheel 232c, and the second slide slot 2322c is located on the front and lower side of the wheel 232c, the first end of the first push rod 233c is located at the end (rear end) of the first slide slot 2321c that is opposite to the second slide slot 2322c, and the first end of the second push rod 234c is located at the end (lower end) of the second slide slot 2322c that is opposite to the first slide slot 2321c, and the elastic member 231c respectively pulls the corresponding first baffle 21c and the second baffle 22c backwards to make the first baffle 21c and the second baffle 22c flip backwards until the air inlet openings of the left part 11a and the right part 11b reach the maximum; the top edges of the first baffle 21c and the second baffle 22c abut against their corresponding position switches 3c, so that the motor stops running.

Claims

1. A range hood capable of distributing air volume, comprising a housing, the lower portion of the housing having a vertically extending smoke inlet cavity, a front side wall of the lower portion of the housing having a smoke inlet port communicating with the smoke inlet cavity, characterized in that: The smoke inlet has a left part and a right part which are arranged side by side in the transverse direction, and an adjustment structure capable of adjusting the opening size of the left part and the right part is provided at the smoke inlet; The adjustment structure at least includes a first baffle and a second baffle, the first baffle and the second baffle are respectively arranged corresponding to the left and right parts of the smoke inlet and the lower edges thereof are respectively rotatably connected to the lower edge of the smoke inlet, and an air inlet whose opening can be adjusted due to the rotation of the baffle is formed between the upper edge of the first baffle, the upper edge of the second baffle and the corresponding upper edge of the smoke inlet; When the air inlet is open, the first baffle plate / the second baffle plate forms a guide plate that gradually tilts from bottom to top and from front to back; The adjustment structure also includes a driving mechanism that can drive the first baffle and / or the second baffle to flip forward and backward to adjust the size of the left and / or right air inlet.

2. The range hood capable of distributing air volume according to claim 1, characterized in that: The driving mechanism includes an elastic member, a swing member and a driving member. The elastic member enables the first baffle and the second baffle to always maintain a tendency to flip backwards. The swing member is rotatably arranged on the rear side of the first baffle and the second baffle. The outer peripheral wall of the swing member is provided with a first lever arm and a second lever arm which can abut against the rear side wall of the first baffle and the second baffle as the swing member rotates, thereby pushing them to flip forward to overcome the elastic force of the elastic member. The driving member is used to drive the swing member to rotate.

3. The range hood capable of distributing air volume according to claim 2, characterized in that: The swing member has a rotating shaft arranged parallel to the first baffle plate and the second baffle plate. The first lever arm and the second lever arm are arranged axially spaced apart from each other along the rotating shaft and extend radially. The first lever arm is arranged corresponding to the rear side wall of the first baffle plate, and the second lever arm is arranged corresponding to the rear side wall of the second baffle plate.

4. The range hood capable of distributing air volume according to claim 3, characterized in that: In the circumferential direction of the swinging member, an angle of 80° to 130° is formed between the first lever arm and the second lever arm.

5. The range hood capable of distributing air volume according to claim 4, characterized in that: An included angle of 100° is formed between the first lever arm and the second lever arm.

6. The range hood capable of distributing air volume according to claim 3, characterized in that: The end of the first lever arm is provided with a first roller which can be rotatably matched with the rear side wall of the first baffle plate, and the end of the second lever arm is provided with a second roller which can be rotatably matched with the rear side wall of the second baffle plate.

7. The range hood capable of distributing air volume according to claim 3, characterized in that: The driving mechanism further includes a limiting member disposed on the side of the swinging member and used for limiting the rotation angle of the swinging member, the limiting member being arranged close to the first lever arm, and when the swinging member rotates to the state where the first lever arm pushes the first baffle to flip forward to a maximum angle, the first lever arm abuts against a first edge of the limiting member, and the second lever arm disengages from the second baffle so that the second baffle flips backward to a maximum angle; When the swing member rotates to the state where the second lever arm pushes the second baffle to flip forward to the maximum angle, the first lever arm abuts against the second edge of the limiting member opposite to the first edge, and the first lever arm disengages from the first baffle to flip the first baffle backward to the maximum angle.

8. The range hood capable of distributing air volume according to claim 7, characterized in that: The driving mechanism also includes a bracket for supporting the swinging member, which is constrained in the smoke inlet chamber and has a supporting arm extending toward the first baffle and the second baffle. The rotating shaft of the swinging member is rotatably connected to the supporting arm. The driving member is arranged beside the bracket and the output shaft is connected to the rotating shaft.

9. The range hood capable of distributing air volume according to claim 8, characterized in that: A first baffle extending backwards is provided at the edge of the first baffle plate near the middle of the smoke inlet, and a first clearance opening is opened on the first baffle plate for the rotation shaft to pass through; a second baffle extending backwards is provided at the edge of the second baffle plate near the middle of the smoke inlet, and a second clearance opening is opened on the second baffle plate for the rotation shaft to pass through.

10. The range hood capable of distributing air volume according to claim 9, characterized in that: The bottom wall of the smoke inlet chamber forms an oil guide plate which is gradually inclined from front to back and from bottom to top. When the first baffle plate / the second baffle plate is flipped backward to the maximum angle, the rear edge of the first baffle plate / the second baffle plate is arranged close to the rear side wall of the smoke inlet chamber, and the lower edge of the first baffle plate / the second baffle plate is arranged close to the oil guide plate.

11. The range hood capable of distributing air volume according to claim 10, characterized in that: A concave assembly plate is arranged in the middle of the oil guide plate, and the bottom of the bracket is fixed on the assembly plate.

12. The range hood capable of distributing air volume according to claim 1, characterized in that: The driving mechanism includes an elastic member, a first swing member, a second swing member and a first driving member and a second driving member, wherein the elastic member enables the first baffle and the second baffle to always maintain a tendency to flip backwards, and the first swing member and the second swing member are rotatably arranged on the rear sides of the first baffle and the second baffle respectively, and a first lever arm is arranged on the outer peripheral wall of the first swing member, which can abut against the rear side wall of the first baffle as the first swing member rotates, thereby pushing it to flip forward by overcoming the elastic force of the elastic member, and a second lever arm is arranged on the outer peripheral wall of the second swing member, which can abut against the rear side wall of the second baffle as the swing member rotates, thereby pushing it to flip forward by overcoming the elastic force of the elastic member, and the first driving member is used to drive the first swing member to rotate, and the second driving member is used to drive the second swing member to rotate.

13. The range hood capable of distributing air volume according to claim 12, characterized in that: The first swing member has a first rotation axis arranged parallel to the first baffle, and the first lever arm extends radially along the first rotation axis; the second swing member has a second rotation axis arranged parallel to the second baffle, and the second lever arm extends radially along the second rotation axis.

14. The range hood capable of distributing air volume according to claim 1, characterized in that: The driving mechanism includes a swinging member, a first telescopic member, a second telescopic member and a driving member. The swinging member is rotatably arranged on the rear sides of the first baffle and the second baffle. The first end of the first telescopic member is rotatably connected to the swinging member, and the second end is rotatably connected to the first baffle. The first telescopic member has a contraction tendency and can be stretched under a force state. The first end of the second telescopic member is rotatably connected to the swinging member, and the second end is rotatably connected to the second baffle. The second telescopic member has a contraction tendency and can be stretched under a force state. The driving member is used to drive the swinging member to rotate.

15. The range hood capable of distributing air volume according to claim 14, characterized in that: The swing member has a first swing arm and a second swing arm extending radially respectively, the first swing arm and the second swing arm are arranged at an obtuse angle, the first end of the first telescopic member is rotatably connected to the first swing arm, and the first end of the second telescopic member is rotatably connected to the second swing arm.

16. The range hood capable of distributing air volume according to claim 14, characterized in that: The first telescopic member and the second telescopic member have the same structure and both have a spring capable of maintaining a contraction tendency.

17. The range hood capable of distributing air volume according to claim 16, characterized in that: The first telescopic member / second telescopic member includes a sleeve, an inner column and the spring. The first end of the sleeve has a first hinge portion, and the second end has an opening for the inner column to pass through. The inner column can be extended and retracted along the axial direction of the sleeve and is arranged in the sleeve with the first end constrained on the sleeve and the second end having a second hinge portion.

18. The range hood capable of distributing air volume according to claim 17, characterized in that: The first end of the inner column has a first retaining ring arranged along the circumferential direction, and correspondingly, the opening of the second end of the sleeve has a second retaining ring that can abut against the first retaining ring to prevent the inner column from detaching from the sleeve.

19. The range hood capable of distributing air volume according to claim 18, characterized in that: The spring is arranged in the sleeve and is sleeved on the outer periphery of the inner column. The first end of the spring abuts against the first retaining ring, and the second end abuts against the second retaining ring.

20. The range hood capable of distributing air volume according to claim 14, characterized in that: The driving member is a motor, the output shaft of which is connected to the swinging member, and a position switch is provided on the rear wall of the smoke inlet chamber, which can control whether the motor is running when the first baffle and the second baffle are flipped backward to the maximum opening state of the air inlet.

21. The range hood capable of distributing air volume according to claim 1, characterized in that: The driving mechanism includes an elastic member, a wheel disc, a first push rod, a second push rod and a driving member. The elastic member enables the first baffle and the second baffle to always maintain a tendency to flip backwards. The wheel disc is rotatably arranged on the rear side of the first baffle and the second baffle. The first end of the first push rod is rotatably connected to the wheel disc, and the second end is rotatably connected to the first baffle. The first end of the second push rod is rotatably connected to the wheel disc, and the second end is rotatably connected to the second baffle. The driving member is used to drive the wheel disc to rotate.

22. The range hood capable of distributing air volume according to claim 21, characterized in that: The wheel disc is provided with a first slide groove and a second slide groove extending in a circumferential direction. The first slide groove and the second slide groove are close to each other and arranged alternately. The first end of the first push rod can be constrained in the first slide groove for reciprocating sliding, and the first end of the second push rod can be constrained in the second slide groove for reciprocating sliding.

23. The range hood capable of distributing air volume according to claim 22, characterized in that: The first slide groove and the second slide groove are both arc-shaped, and the corresponding central angles thereof are 45° to 80°.

24. The range hood capable of distributing air volume according to claim 23, characterized in that: When the first baffle and the second baffle are both flipped backward to their maximum angles, the first end of the first push rod is located at the end of the first slide slot that is opposite to the second slide slot, and the first end of the second push rod is located at the end of the second slide slot that is opposite to the first slide slot; when the first baffle is flipped forward to its maximum angle and the second baffle is flipped backward to its maximum angle, the first end of the first push rod is located at the end of the first slide slot that is opposite to the second slide slot, and the first end of the second push rod is located at the end of the second slide slot that is close to the first slide slot; when the first baffle is flipped backward to its maximum angle and the second baffle is flipped forward to its maximum angle, the first end of the first push rod is located at the end of the first slide slot that is close to the second slide slot, and the first end of the second push rod is located at the end of the second slide slot that is opposite to the first slide slot.

25. The range hood capable of distributing air volume according to claim 22, characterized in that: The wheel disc comprises a shaft located at the center and a first disc and a second disc arranged at intervals on the shaft. The first disc and the second disc rotate synchronously with the shaft. The first slide groove is provided on the first disc, and the second slide groove is provided on the second disc.

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