Range hood

Abstract

The utility model discloses a range hood which comprises an air inlet assembly and an upper box body used for arranging a fan system, an air inlet is formed in the bottom face of the upper box body, the air inlet assembly comprises a lower box body, and the lower box body comprises a back plate located below the upper box body; the smoke gathering plate piece comprises a baffle and a smoke barrier, the length of the smoke barrier is L2, and the baffle and the smoke barrier have a closed state and an open state: when the baffle and the smoke barrier are in the closed state, the smoke barrier covers the front surface of the back plate, and the vertical distance between the lower edge of the smoke barrier and the back plate is d1; in the open state, a smoke gathering cavity is formed between the smoke baffle and the front face of the back plate and between the baffle and the front face of the back plate, the vertical distance between the lower edge of the smoke baffle and the back plate is d2, the included angle between the smoke baffle and the back plate is beta, and the following relation is met: d2-L2 * sin beta is larger than d1.

Description

[0001] This utility model is a divisional case of the following Chinese patent application:

[0002] The application number is 202321648748.3, the application date is October 27, 2022, and the name of the utility model is "A range hood". Technical Field

[0003] The utility model relates to an oil fume purification device, in particular to an oil fume extractor. Background Art

[0004] Range hoods have become one of the indispensable kitchen appliances in modern families. Range hoods work based on the principle of fluid dynamics. A centrifugal fan installed inside the range hood absorbs and exhausts oil smoke, and uses a filter to filter out some grease particles. The centrifugal fan includes a volute, an impeller installed in the volute, and a motor that drives the impeller to rotate. When the impeller rotates, negative pressure suction is generated at the center of the fan, sucking the oil smoke under the range hood into the fan. After being accelerated by the fan, it is collected by the volute and guided to be discharged outdoors.

[0005] Since the space in the kitchen is limited, in order to improve the space utilization rate of the kitchen, a thin range hood has been developed, such as a new range hood disclosed in Chinese patent application No. 202021790417.X, comprising: a main unit, comprising a main unit housing and a fan arranged in the main unit housing; a smoke extraction device, arranged below the main unit, comprising a smoke inlet surface, wherein the fan sucks the oil smoke above the stove from the smoke inlet surface into the smoke extraction device when in operation; a smoke baffle, rotatably connected to the smoke inlet surface, for blocking the oil smoke above the stove from escaping outwards when rotated to a certain angle; and another example is a range hood disclosed in Chinese patent application No. 202021790417.X, comprising: a main unit, comprising a main unit housing and a fan arranged in the main unit housing; a smoke extraction device, arranged below the main unit, comprising a smoke inlet surface, wherein the fan sucks the oil smoke above the stove from the smoke inlet surface into the smoke extraction device when in operation; and a smoke baffle, rotatably connected to the smoke inlet surface, for blocking the oil smoke above the stove from escaping outwards when rotated to a certain angle; and A new type of range hood disclosed in Chinese patent No. 202020358616.7 includes: a main unit, including a main unit housing and a fan arranged in the main unit housing; an upper body, arranged below the main unit, and an upper air inlet is arranged at the bottom of the upper body; a lower body, arranged below the upper body, the upper body and the lower body are in an inverted L-shaped structure, and the interior of the lower body is connected to the interior of the upper body; a lower air inlet is arranged on the lower body, and a main smoke shield is arranged on the side of the lower air inlet facing away from the lower body; a first side surface of the main smoke shield is arranged on the upper side of the lower air inlet through a rotating shaft, and the main smoke shield can rotate around the rotating shaft.

[0006] As can be seen from the above, in the existing thin range hoods, after the smoke baffle is rotated to the open position, the depth of the smoke collecting area is not large, which easily causes the smoke to escape and the smoke extraction effect is not ideal. If this rotation method is to expand the negative pressure area outward to improve the smoke collection effect, it will block the line of sight and have a great impact on the cooking operation. Utility Model Content

[0007] The technical problem to be solved by the utility model is to provide a range hood in view of the above-mentioned deficiencies in the prior art, wherein the negative pressure zone expands outwards during operation to improve the range hood absorbing effect.

[0008] The first technical solution adopted by the utility model to solve the above technical problems is: a range hood, including an air inlet assembly and an upper box body for arranging a fan system, the bottom surface of the upper box body is provided with an air inlet, characterized in that: the air inlet assembly includes:

[0009] a lower box body, the lower box body comprising a back plate located below the upper box body; and

[0010] The smoke trapping plate comprises a baffle and a smoke baffle, wherein the length of the smoke baffle is L2, and the baffle and the smoke baffle have a closed state and an open state:

[0011] When in the closed state, the smoke baffle covers the front of the back plate, and the vertical distance between the lower edge of the smoke baffle and the back plate is d1;

[0012] When in the open state, a smoke collecting cavity is formed between the smoke baffle and the baffle together and the front of the back plate, and the smoke collecting cavity is connected with the upper box body through the air inlet. The vertical distance between the lower edge of the smoke baffle and the back plate is d2, and the angle between the smoke baffle and the back plate is β, and the following relationship is satisfied: d2-L2*sinβ>d1.

[0013] By setting the smoke shield and the baffle, the connection between the air inlet and the outside air can be blocked when the machine is turned off (at this time, the smoke shield covers the front of the back plate and no smoke collection cavity is formed, so the air inlet is not connected to the outside). The smoke shield that forms the smoke collection cavity with the back plate can also be moved forward when the machine is working. Compared with the scheme of forming the smoke collection cavity only by the smoke shield, this method of the utility model can make the smoke shield be in a more forward position when the smoke shield is the same length and opened at the same angle, the negative pressure zone expands forward and outward, and the smoke collection range is increased, thereby improving the oil fume absorption effect.

[0014] Preferably, the value range of d2 satisfies the following relationship: d2 ≥ 400 mm, so as to obtain a sufficient smoke collection range.

[0015] Preferably, the smoke baffle is rotatably connected to the baffle.

[0016] Furthermore, in the open state, the angle between the baffle and the back plate is α, and β≥α is satisfied, so as to ensure smooth air intake, prevent the oil smoke from hitting the connection between the baffle and the smoke baffle to form a vortex, and better guide it into the upper box through the air inlet.

[0017] Preferably, the value range of α is less than 55°, less than 50° or less than 45°, and the value range of β is less than 55°, less than 50° or less than 45°, so as to avoid blocking the line of sight due to excessive opening angle.

[0018] Preferably, the length of the baffle is L1. When in the open state, the vertical distance between the lower edge of the smoke baffle and the back plate is d2=L1*sinα+L2*sinβ+d1, thereby simultaneously expanding and descending the negative pressure zone, further improving the oil fume absorption effect.

[0019] Preferably, the length of the baffle is L1, and the value range of L1:L2 is 1:4 to 1:1.5. Under the premise that cooking is not affected when the baffle and the smoke shield are opened, the total height of the two panels is basically limited. When the ratio continues to increase, the smoke shield will be closer to the user's face when opened, affecting the user experience and may also block the line of sight. If the ratio is too small, the width of the air inlet is small, which affects the smoothness of the air inlet.

[0020] In order to achieve the maximum air inlet area and smoke collecting area, the baffle is rotatably connected to the upper box body or the lower box body, and the upper end of the smoke baffle is connected to the free end of the baffle.

[0021] Furthermore, the range hood also includes a first motion mechanism for driving the smoke baffle and the baffle linkage, the first motion mechanism includes a rotation drive module and a first connecting rod driven to rotate by the rotation drive module, one end of the first connecting rod is rotatably connected to the upper box body, and the other end of the first connecting rod is fixed to the smoke baffle, thereby simplifying the motion mechanism.

[0022] Furthermore, in order to maximize the effect of the baffle on lengthening the smoke baffle and maximize the smoke collecting area, slide grooves are opened on the left and right sides of the baffle, and a rotating shaft is provided in the lower box or the upper box, and the rotating shaft is engaged in the slide groove.

[0023] The second technical solution adopted by the utility model to solve the above technical problems is: a range hood, including an air inlet assembly and an upper box body for arranging a fan system, the bottom of the upper box body is provided with an air inlet, characterized in that: the air inlet assembly includes:

[0024] A lower box body, the lower box body comprising a back plate located below the upper box body and first side plates arranged on both sides of the back plate; and

[0025] The smoke trapping plate comprises a baffle and a smoke baffle, wherein the length of the baffle is L1, and the length of the smoke baffle is L2;

[0026] An oil cup is provided at the bottom of the lower box;

[0027] The baffle and smoke baffle have a closed state and an open state:

[0028] When in the closed state, the smoke baffle covers the front of the back plate, and the vertical distance between the lower edge of the smoke baffle and the back plate is d1;

[0029] When in the open state, the baffle is located above the smoke shield, and a smoke collecting cavity is formed between the smoke shield and the baffle and the front of the back panel. The smoke collecting cavity is connected with the upper box body through the air inlet. The angle between the smoke shield and the back panel is β, the angle between the baffle and the back panel is α, the vertical distance between the lower edge of the smoke shield and the back panel is d2, and the following relationship is satisfied: d2-L2*sinβ>d1, β≥α, and the value range of α is less than 55°, less than 50° or less than 45°.

[0030] By setting a rotatably connected smoke shield and baffle, the air inlet can be blocked from the outside air when the machine is turned off, and the smoke shield that forms a smoke collection chamber with the back plate can be moved forward and lowered when the machine is working. Compared with the solution of forming the smoke collection chamber only by the smoke shield, this method of the utility model can make the smoke shield be in a more forward and lower position when the smoke shield is the same length and opened at the same angle, and the negative pressure area can expand forward and downward, and the smoke collection range can be increased, thereby improving the oil fume absorption effect.

[0031] Preferably, the smoke baffle is rotatably connected to the baffle.

[0032] Preferably, the value range of d2 satisfies the following relationship: d2 ≥ 400 mm, so as to obtain a sufficient smoke collection range.

[0033] In order to achieve the maximum air inlet area and smoke collecting area, the baffle is rotatably connected to the upper box body or the lower box body, and the upper end of the smoke baffle is connected to the free end of the baffle.

[0034] Compared with the prior art, the advantages of the utility model are: by setting the smoke shield and the baffle, the connection between the air inlet and the external air can be blocked when the machine is turned off, and the smoke shield that forms the smoke collection cavity with the back plate can be moved forward when the machine is working. Compared with the scheme of forming the smoke collection cavity only by the smoke shield, this method of the utility model can make the smoke shield be in a more forward position when the smoke shield is opened at the same angle, the negative pressure zone expands forward and outward, and the smoke collection range is increased, thereby improving the oil fume absorption effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the range hood in the closed state of the first embodiment of the utility model;

[0036] Figure 2 for Figure 1 A cross-sectional view of a range hood;

[0037] Figure 3 for Figure 2 A schematic diagram of the partial enlargement of Ⅰ;

[0038] Figure 4 for Figure 1A schematic diagram of a smoke baffle, a baffle and a motion mechanism of a range hood;

[0039] Figure 5 This is a schematic diagram of the range hood in the middle of opening according to the first embodiment of the utility model;

[0040] Figure 6 for Figure 5 A cross-sectional view of a range hood;

[0041] Figure 7 This is a schematic diagram of the range hood in the first embodiment of the utility model in an open state;

[0042] Figure 8 for Figure 7 A cross-sectional view of a range hood;

[0043] Fig. 9 It is a schematic diagram of a smoke baffle, a baffle and a motion mechanism thereof of a range hood according to a second embodiment of the utility model;

[0044] Fig.10 It is a schematic diagram of a smoke baffle, a baffle and a motion mechanism thereof of a range hood according to a third embodiment of the utility model. DETAILED DESCRIPTION

[0045] Embodiments of the present utility model are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions.

[0046] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the embodiments disclosed in the present utility model can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0047] Embodiment 1

[0048] See also Figure 1 to Figure 6A range hood includes an air inlet assembly 1 and an upper box 2, wherein a fan system 3 is arranged in the upper box 2. In the installed state, the upper box 2 is hidden in a kitchen cabinet, and the bottom surface of the upper box 2 can be flush with the cabinet, and only the air inlet assembly 1 is exposed under the cabinet. Alternatively, the fan system 3 can also be arranged in other boxes connected to the upper box 2.

[0049] The air inlet assembly 1 includes a lower box 11, a smoke baffle 12 and a baffle 13. The smoke baffle 12 and the baffle 13 constitute a smoke collecting plate. The bottom of the upper box 2 is preferably provided with an air inlet 21 near the rear end. The air inlet 21 extends in the left and right directions. The fan system 3 is arranged near the front side of the upper box 2. A filter 5 is arranged inside the upper box 2. The filter 5 is located above the air inlet 21 and extends forward beyond the air inlet 21. The filter 5 gradually tilts downward from front to back. The filter 5 does not have mesh holes at the position corresponding to the fan system 3 and is closed. The structure and arrangement of the filter 5 can prevent oil droplets from flying out during operation, and at the same time guide the condensed oil in the fan system 3 to the rear side, and collect it into the oil cup 6 arranged at the bottom of the lower box 11 through the lower box 11.

[0050] The lower box body 11 includes a back panel 111, a first side panel 112 and a top panel 113. The back panel 111 is located below the rear side of the upper box body 2 and extends downward from the lower end of the upper box body 2. The top panel 113 is formed by extending the top of the back panel 111 forward. The back panel 111, the first side panel 112 and the top panel 113 can be independent panels or integrated panels. The top panel 113 can be in a state of gradually tilting downward from front to back. The width of the back panel 111 (the dimension in the left-right direction) is greater than the width of the upper box body 2. The top panel 113 is located on the left and right sides of the upper box body 2. Preferably, the top panel 113 is close to the lower end of the upper box body 2. The first side panel 112 is arranged on the left and right sides of the top panel 113. The first side panel 112 can also be arranged on the left and right sides of the back panel 111 or on the left and right sides of the smoke baffle 12. See. Figure 8 The depth h1 (the dimension in the front-to-back direction) of the air inlet 21 is greater than the thickness h2 of the corresponding portion of the lower box body 11 at the back plate 111, and h2 does not exceed 50 mm.

[0051] The lower box body 11 forms an inner concave portion 114 on one side corresponding to the smoke collecting plate, and the inner concave portion 114 is formed in a shape that is concave in a direction away from the smoke baffle 12. Alternatively, the width of the back plate 111 may be equal to the width of the upper box body 2, in which case the top plate 113 is not required, and the first side plates 112 may still be provided on the left and right sides of the back plate 111 or the left and right sides of the smoke baffle 12.

[0052] The smoke baffle 12 is rotatably disposed at the front side of the back plate 111, and its upper end or a position close to the upper end is used for connection, while the lower end is a free end, and the rotation axis extends in the left-right direction, which can play a role in collecting smoke when opened. The baffle 13 is rotatably disposed at the air inlet 21, and the rotation axis extends in the left-right direction to open and close the air inlet 21. The baffle 13 is rotatably connected to the front side or a position close to the front side of the air inlet 21, and the upper end of the smoke baffle 12 is connected to the free end (the rear end in the closed state) of the baffle 13. When the baffle 13 closes the air inlet 21, the front and rear ends of the top plate 113 are closed at the same time.

[0053] The smoke damper 12 and the baffle 13 can move independently or in linkage. In this embodiment, the movement form of the smoke damper 12 and the baffle 13 is linkage. For this purpose, the range hood further includes a movement mechanism for driving the smoke damper 12 and the baffle 13 in linkage. The movement mechanism includes a driving mechanism 41 and a transmission mechanism. The driving mechanism 41 is preferably an electric push rod. The transmission mechanism includes a first connecting rod 421. One end of the first connecting rod 421 is rotationally connected to the inner side of the upper box body 2, and the other end of the first connecting rod 421 is fixed to the smoke damper 12. The electric push rod (the main part except the push rod for output) is rotationally connected to the upper box body 2, and the push rod of the electric push rod is rotationally connected to the part between the two ends of the first connecting rod 421. The rotation axis of the first connecting rod 421 extends in the left and right direction. The position where the first connecting rod 421 is connected to the upper box body 2 is the rotation center of the smoke damper 12. The first connecting rod 421 is in a curved shape that bulges backward, thereby avoiding interference with the baffle 13 during movement. The rotatable electric push rod constitutes a rotation drive module.

[0054] The components of the above-mentioned motion mechanism constitute the active end of the motion mechanism, and the motion mechanism also includes a driven end, which only has a transmission mechanism. The active end and the driven end are respectively connected to positions arranged at intervals on the left and right of the smoke baffle 12.

[0055] The rear end of the baffle 13 is rotatably connected to the upper end of the smoke baffle 12, and the rotation axis extends in the left-right direction. Slide grooves 131 are provided on the left and right sides of the baffle 13, and a rotating shaft 132 that cooperates with the slide groove 131 is provided on the first side plate 112, and the rotating shaft 132 can also rotate relative to the slide groove 131. When the width of the back plate 111 and the upper box body 2 is the same, the rotating shaft 132 can be set in the upper box body 2. That is, the baffle 13 can be rotatably set relative to the upper box body 2.

[0056] See also Figure 1 and Figure 2At this time, the range hood is in a closed state, the baffle 13 closes the air inlet 21, the free end of the baffle 13 covers the air inlet 21, and the smoke baffle 12 is located on the front side of the back plate 111, covering the front of the back plate 111, and is in a roughly vertical state, and can fit with the back plate 111. The depth of the air inlet 21 (the dimension in the front-to-back direction) is greater than the distance between the upper end of the back plate 111 and the upper end of the smoke baffle 12, thereby ensuring that when the air inlet 21 is opened, there is a larger air inlet area under the premise that the lower box body 11 is light and thin. At this time, the vertical distance between the lower edge of the smoke baffle 12 and the back plate 111 is d1. Preferably, at this time, the smoke baffle 12 and the back plate 111 are parallel, and "parallel" here means that the angle between the two is less than 10°.

[0057] See also Figure 5 and Figure 6 The driving mechanism 41 pushes the first connecting rod 421 around Figure 6 The smoke baffle 12 is rotated counterclockwise to push and flip outward, thereby driving the baffle 13 to rotate. The movement trajectory of the baffle 13 is also limited by the cooperation of the rotating shaft 132 and the sliding groove 131.

[0058] See also Figure 7 and Figure 8 , the smoke baffle 12 is opened to the limit position, at which time the baffle 13 and the smoke baffle 12 are in an unfolded state, almost in the same plane, and the baffle 13 and the smoke baffle 12 together constitute a smoke-collecting plate, which lengthens the length of the original smoke baffle 12, so that the smoke-collecting range can be made larger. At this time, the smoke baffle 12 is located at the front side of the position when it is closed, and the smoke baffle 12 and the baffle 13 together form a smoke-collecting cavity Q with the front of the back plate 111, and the inner concave portion 114 also constitutes a part of the smoke-collecting cavity Q. The smoke-collecting cavity Q is connected to the interior of the upper box body 2 through the air inlet 21, and the oil smoke enters the upper box body 2 from the rear side of the smoke baffle 12 and the baffle 13 upward through the air inlet 21.

[0059] The length of the baffle 13 is L1, the length of the smoke baffle 12 is L2, and the value range of L1:L2 is 1:4 to 1:1.5. Under the premise that cooking is not affected after opening, the total height of the baffle and the smoke baffle is basically limited. When this ratio continues to increase, the smoke baffle will be closer to the user's face after opening, affecting the user experience and may also block the line of sight. Although a larger L2 can make the lower end of the smoke baffle lower, the negative pressure area will also drop lower, which is conducive to the improvement of the oil fume absorption effect, but the risk of breaking the pot will increase; if the ratio is too small, the width of the air inlet is small, affecting the smoothness of the air inlet.

[0060] In the open state, the angle α of the baffle 13 relative to the back plate 111 (when the range hood is normally installed, the back plate 111 is usually vertical), the angle β of the smoke baffle 12 relative to the back plate 111, and the vertical distance between the lower edge of the smoke baffle 12 and the back plate 111 is d2, d2 = L1*sinα + L2*sinβ + d1, and preferably satisfies the following relationship: d2-L2*sinβ>d1. The value range of d2 preferably satisfies d2≥400mm. Thereby, the negative pressure area is expanded outward to improve the fume extraction effect. The value range of α is preferably less than 55°, less than 50° or less than 45°; the value range of β is less than 55°, less than 50° or less than 45°, so as to avoid the opening angle being too large and blocking the line of sight. The above-mentioned angle preferably satisfies the following relationship: β≥α, so as to ensure smooth air intake, prevent the oil smoke from hitting the connection between the baffle 13 and the smoke baffle 12 to form a vortex, and better guide it into the upper box body 2 through the air inlet 21.

[0061] In this embodiment, the baffle 13 at the air inlet of the range hood is folded and unfolded relative to the smoke baffle 12, so as to achieve extreme lightness and thinness in the off state and a larger air inlet channel and a larger smoke collection range in the working state, so as to achieve both lightness and smoke extraction effect. This form also makes it unnecessary for the air inlet component 1 to form an air inlet channel, and the smoke baffle 12 can be close to the back plate 111 when closed, so that the overall thickness of the air inlet component 1 is extremely light and thin, preferably about ten millimeters.

[0062] Embodiment 2

[0063] See also Fig. 9 In this embodiment, the difference from the above-mentioned embodiment 1 is that the driving mechanism 41 adopts a motor, and the transmission mechanism also includes a first gear 422 and a first rack 423. The first gear 422 is connected to the output shaft of the motor and can rotate around an axis extending left and right. The first gear 422 and the first rack 423 are meshed. The first rack 423 is fan-shaped, and the teeth of the first rack 423 are formed on the arc surface of the fan. The first rack 423 is fixed to the first connecting rod 421. The above-mentioned motor, the first gear 422 and the first rack 423 constitute a rotation driving module.

[0064] Therefore, when the motor is started, the first gear 422 can drive the first rack 423 to rotate, thereby driving the first connecting rod 421 to rotate.

[0065] Embodiment 3

[0066] See also Fig.10 In this embodiment, the difference from the above-mentioned second embodiment is that the first connecting rod 421 is directly connected to the output shaft of the motor and is directly driven to rotate by the motor.

Claims

1. A range hood, comprising an air inlet assembly (1) and an upper housing (2) for arranging a fan system, wherein an air inlet (21) is arranged at the bottom of the upper housing (2), and characterized in that: The air inlet assembly (1) comprises: A lower box (11), the lower box (11) comprising a back plate (111) located below the upper box (2); and The smoke trapping plate comprises a baffle (13) and a smoke baffle (12), wherein the length of the smoke baffle (12) is L2, and the baffle (13) and the smoke baffle (12) have a closed state and an open state: When in a closed state, the smoke baffle (12) covers the front side of the back plate (111), and the vertical distance between the lower edge of the smoke baffle (12) and the back plate (111) is d1; When in the open state, the smoke baffle (12) and the baffle (13) together form a smoke collecting chamber (Q) with the front side of the back plate (111); the smoke collecting chamber (Q) is connected to the upper box body (2) through the air inlet (21); the vertical distance between the lower edge of the smoke baffle (12) and the back plate (111) is d2; the angle between the smoke baffle (12) and the back plate (111) is β, and the following relationship is satisfied: d2-L2*sinβ>d1.

2. The range hood according to claim 1, characterized in that: The value range of d2 satisfies the following relationship: d2≥400mm.

3. The range hood according to claim 1, characterized in that: The smoke baffle (12) is rotatably connected to the baffle (13).

4. The range hood according to claim 3, characterized in that: In the open state, the angle between the baffle (13) and the back plate (111) is α, and β≥α is satisfied.

5. The range hood according to claim 4, characterized in that: The value range of α is less than 55°, less than 50° or less than 45°, and the value range of β is less than 55°, less than 50° or less than 45°.

6. The range hood according to claim 3, characterized in that: The length of the baffle (13) is L1, and in the open state, the vertical distance between the lower edge of the smoke baffle (12) and the back plate (111) is d2=L1*sinα+L2*sinβ+d1.

7. The range hood according to claim 1, characterized in that: The length of the baffle (13) is L1, and the value range of L1:L2 is 1:4 to 1:1.

5.

8. The range hood according to claim 3, characterized in that: The baffle (13) is rotatably connected to the upper box body (2) or the lower box body (11), and the upper end of the smoke baffle (12) is connected to the free end of the baffle (13).

9. The range hood according to claim 8, characterized in that: The range hood further comprises a first motion mechanism for driving the smoke baffle (12) and the baffle (13) to be linked, the first motion mechanism comprising a rotation drive module and a first connecting rod (421) driven to rotate by the rotation drive module, one end of the first connecting rod (421) being rotationally connected to the upper box body (2), and the other end of the first connecting rod (421) being fixed to the smoke baffle (12).

10. The range hood according to claim 9, characterized in that: The baffle (13) is provided with sliding grooves (131) on the left and right sides, and a rotating shaft (132) is provided in the lower box body (11) or the upper box body (2), and the rotating shaft (132) is fitted in the sliding grooves (131).

11. A range hood, comprising an air inlet assembly (1) and an upper housing (2) for arranging a fan system, wherein an air inlet (21) is arranged at the bottom of the upper housing (2), and characterized in that: The air inlet assembly (1) comprises: A lower box body (11), the lower box body (11) comprising a back plate (111) located below the upper box body (2) and first side plates (112) arranged on both sides of the back plate (111); and A smoke trapping plate, comprising a baffle (13) and a smoke baffle (12), wherein the baffle (13) has a length of L1, and the smoke baffle (12) has a length of L2; An oil cup (6) is provided at the bottom of the lower box (11); The baffle (13) and the smoke baffle (12) have a closed state and an open state: When in a closed state, the smoke baffle (12) covers the front side of the back plate (111), and the vertical distance between the lower edge of the smoke baffle (12) and the back plate (111) is d1; In the open state, the baffle (13) is located above the smoke shield (12), and a smoke collecting chamber (Q) is formed between the smoke shield (12) and the baffle (13) together and the front of the back plate (111), and the smoke collecting chamber (Q) is connected to the upper box body (2) through the air inlet (21), the angle between the smoke shield (12) and the back plate (111) is β, the angle between the baffle (13) and the back plate (111) is α, the vertical distance between the lower edge of the smoke shield (12) and the back plate (111) is d2, and the following relationship is satisfied: d2-L2*sinβ>d1, β≥α, and the value range of α is less than 55°, less than 50° or less than 45°.

12. The range hood according to claim 11, characterized in that: The smoke baffle (12) is rotatably connected to the baffle (13).

13. The range hood according to claim 11, characterized in that: The value range of d2 satisfies the following relationship: d2≥400mm.

14. The range hood according to claim 11, characterized in that: The baffle (13) is rotatably connected to the upper box body (2) or the lower box body (11), and the upper end of the smoke baffle (12) is connected to the free end of the baffle (13).

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