A range hood

Abstract

The utility model discloses a kind of range hood, comprising: upper box body assembly;Air inlet body, can rotate relative to upper box body assembly, the air inlet body can be at at least partially lower than the state of the bottom of upper box body assembly and expose to upper box body assembly, the air inlet body includes smoke side;Smoke baffle, can rotate relative to upper box body assembly;And movement mechanism, for driving air inlet body and smoke baffle linkage, it includes driving mechanism and transmission mechanism, the driving mechanism includes output end, one end of the air inlet body is directly or indirectly connected with output end and is rotated by output end, the transmission mechanism includes gear set and crank, one end of the crank is rotatably connected with upper box body assembly, the primary gear of gear set is rotated by output end, the last gear of gear set is connected with crank and rotates synchronously, the crank is also connected with smoke baffle and fixed.

Description

Technical Field

[0001] This utility model relates to an oil fume purification device, and more particularly to an oil fume extractor. Background Technology

[0002] Existing range hoods are mainly divided into two types: European style and close-range suction. European style range hoods have wider smoke collection hoods, which often cause users to bump their heads. Although close-range suction range hoods solve the problem of bumping heads, the exposed parts of close-range suction range hoods are larger, which gives users a visually oppressive experience and makes them less refined and unable to be installed discreetly.

[0003] To address this, a lift-type range hood has been invented, where the air inlet can be raised and lowered; it descends when the hood is on and rises when it is off. For example, Chinese Patent Application No. 202310591483.6 discloses a concealed range hood, comprising a main body, a flip-up shell, and a smoke-gathering plate. The main body has an opening at its bottom; the flip-up shell rotates with the main body to flip into or out of the opening, forming a flue between the flip-up shell and the main body, and the flip-up shell has a smoke inlet communicating with the flue; the smoke-gathering plate is movably connected to the flip-up shell to block or release the smoke inlet and gather the smoke below it. In this type of range hood, the flip-up shell and the smoke-gathering plate each require independent drive mechanisms, resulting in a complex structure and high cost. Utility Model Content

[0004] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing a range hood in which the smoke baffle and the air inlet share a single moving mechanism, which is low in cost and simple in structure.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a range hood, comprising: an upper housing assembly; an air inlet body that can rotate relative to the upper housing assembly, wherein the air inlet body can be in a state where it is at least partially below the bottom of the upper housing assembly and exposed above the upper housing assembly, the air inlet body including a smoke inlet side; a smoke baffle that can rotate relative to the upper housing assembly; and a motion mechanism for driving the air inlet body and the smoke baffle to move together, which includes a drive mechanism and a transmission mechanism, wherein the drive mechanism includes an output end, characterized in that: one end of the air inlet body is directly or indirectly connected to the output end and is driven to rotate by the output end, the transmission mechanism includes a gear set and a crank, one end of the crank is rotatably connected to the upper housing assembly, the primary gear of the gear set is driven to rotate by the output end, the final gear of the gear set is connected to the crank and rotates synchronously, and the crank is also connected and fixed to the smoke baffle.

[0006] By sharing a single motion mechanism between the smoke baffle and the air inlet, costs are reduced and the structure is simplified.

[0007] Furthermore, the gear set includes a first gear, a second gear, and a third gear. The first gear is the primary gear and is driven by the output end. The second gear is the final gear and is connected to the crank. The third gear meshes between the first gear and the second gear. This allows the air inlet and the smoke baffle to rotate in the same direction.

[0008] Preferably, the rotation angle of the smoke baffle is generally greater than the rotation angle of the air inlet. Therefore, the ratio of the number of teeth between the first gear and the second gear is 3:1 to 5:1.

[0009] In order to ensure that the entire movement trajectory of the air intake body is contained within the upper housing assembly and to avoid interference between the air intake body and the upper housing assembly, the rotation center of the air intake body is point D on the vertical section extending along the front-to-back direction of the range hood, the horizontal distance from point D to the rear side of the upper housing assembly is R, and the maximum distance between any point on the air intake body and point D is L2, where R > L2.

[0010] To prevent oil backflow, the air inlet can be in a closed state housed within the upper housing assembly, at which point the smoke inlet side gradually tilts downwards from front to back.

[0011] Preferably, when the air inlet is in the closed state, the tilt angle between the smoke inlet side and the horizontal direction is β, and β ≥ 3°.

[0012] To ensure effective fume extraction, when the air inlet is in the open state exposed above the upper housing assembly, the fume inlet side gradually tilts downwards from front to back.

[0013] Preferably, when the air inlet is in the open state, the inclination angle between the smoke inlet side and the horizontal direction is α, and α ≥ 30°, and the distance between the bottom of the smoke inlet side and the bottom of the upper housing assembly is L3, and L3 ≥ 90mm.

[0014] Compared with the prior art, the advantages of this utility model are: by sharing a set of motion mechanisms for the smoke baffle and the air inlet, the cost is reduced and the structure is simple. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the range hood when it is turned off according to an embodiment of the present invention;

[0016] Figure 2 This is a cross-sectional view of the range hood when it is turned off according to an embodiment of the present invention;

[0017] Figure 3 This is a schematic diagram of the range hood being turned on according to an embodiment of the present invention;

[0018] Figure 4This is a side sectional view of the range hood in an embodiment of the present invention when it is turned on;

[0019] Figure 5 This is a front sectional view of the range hood in an embodiment of the present invention when it is turned on;

[0020] Figure 6 This is a schematic diagram of the motion mechanism of the range hood according to an embodiment of the present utility model;

[0021] Figure 7 This is a schematic diagram of the parameters R and L2 of the range hood in an embodiment of the present invention. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0023] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Since the embodiments disclosed in this utility model can be arranged in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0024] See Figures 1-5 A range hood includes an upper housing assembly 1, an air inlet 2, and a smoke baffle 3.

[0025] The air inlet 2 includes a smoke inlet side 21, on which a smoke inlet 22 is provided. The smoke inlet 22 can be configured in various ways, such as a mesh suction, a hole suction, or a plate suction. The air inlet 2 is located inside the upper housing assembly 1 and is movable relative to the upper housing assembly 1. When the range hood is turned on, the air inlet 2 is at least partially below the bottom of the upper housing assembly 1 and protrudes from the upper housing assembly 1. When the range hood is turned off, the air inlet 2 is at least partially retracted into the upper housing assembly 1, preferably completely inside the upper housing assembly 1.

[0026] See Figure 2The front-to-back depth of the upper housing assembly 1 is L1, preferably 300mm≤L1≤325mm. L1≥300mm ensures the installation space of the fan system above the upper housing assembly 1 and the negative pressure area of ​​the smoke baffle 3, thereby ensuring the oil fume extraction effect. L1≤325mm allows the unit to be hidden in the cabinets of most households.

[0027] See Figures 1-5 The smoke baffle 3 can move relative to the upper housing assembly 1. When the smoke baffle 3 is fully open, it can be positioned in front of the smoke inlet side 21 of the air inlet 2. When the smoke baffle 3 is closed, it can seal the bottom opening of the upper housing assembly 1.

[0028] See Figures 2-6 The range hood also includes a motion mechanism that drives the air inlet 2 and the smoke baffle 3 to move together. The motion mechanism includes a drive mechanism 51 and a transmission mechanism. The drive mechanism 51 includes an output end 511, one end of the air inlet 2 is connected to the output end 511 and is driven to rotate by the output end 511.

[0029] The transmission mechanism includes a gear set and a crank 524. The gear set has a primary gear and a final gear (when there is only one gear, the primary gear and the final gear are the same). The primary gear is driven to rotate by the output end 511 of the drive mechanism 51, and the final gear is connected to the crank 524 to drive the crank 524 to rotate. One end of the crank 524 is rotatably connected to the upper housing assembly 1, and the other end of the crank 524 is connected to the smoke baffle 3. In this embodiment, the gear set includes a first gear 521 and a second gear 522 as primary gears, and a third gear 523 as the final gear. The first gear 521 is connected to the output end 511 and driven to rotate by the output end 511. The end of the crank 524 rotatably connected to the upper housing assembly 1 is driven to rotate by the second gear 522. The third gear 523 meshes between the first gear 521 and the second gear 522, thereby enabling the air inlet 2 and the smoke baffle 3 to rotate in the same direction. The number of gears in the gear set can be selected as needed.

[0030] A bracket 11 is provided on the inner side of the upper housing assembly 1, and a rotating shaft 525 is rotatably mounted on the inner side of the bracket 11. One end of the rotating shaft 525 is rotatably connected to the end of the crank 524 away from the smoke baffle 3, and the other end of the rotating shaft 525 is connected to the second gear 522. The third gear 523 can also be rotatably connected to the inner side of the upper housing assembly 1.

[0031] The air inlet 2 can be regarded as a rigid part, which can ensure that the left and right movements of the air inlet 2 are consistent, and the drive mechanism 51 can be placed on one side.

[0032] Since the rotation angle of the smoke baffle 3 is usually required to be greater than that of the air inlet 2, in this embodiment, the ratio of the number of teeth between the first gear 521 and the second gear 522 is 3:1 to 5:1. By setting the ratio of the number of teeth between the first gear 521 and the second gear 522, which is 3:1 in this embodiment, it is possible to achieve a rotation of the air inlet 2 between closing and opening, such as 36°, and a rotation of the smoke baffle 3 between closing and opening, such as 108°.

[0033] See Figure 2 When the air inlet 2 is closed, it is housed within the upper housing assembly 1, and the smoke inlet side 21 gradually tilts downwards from front to back. At this time, the tilt angle between the smoke inlet side 21 and the horizontal direction is β, preferably β ≥ 3°, thereby ensuring that the oil does not backflow during the opening and closing of the air inlet 2.

[0034] See Figure 7 On the vertical section extending along the front and back direction of the range hood, the rotation center of the first gear 521 is D (which is also the rotation center of the air inlet 2), the horizontal distance from point D to the rear side of the upper housing assembly 1 is R, and the maximum distance between any point on the air inlet 2 and point D is L2, where R > L2.

[0035] See Figure 4 To ensure effective fume extraction, after the air inlet 2 is opened, the smoke inlet side 21 gradually tilts downwards from front to back. The tilt angle of the smoke inlet side 21 is α, where α ≥ 30°. The distance between the bottom of the smoke inlet side 21 and the bottom of the upper housing assembly 1 is L3, where L3 ≥ 90 mm.

[0036] For the opening process of smoke baffle 3, please refer to [link / reference]. Figure 2 The first gear 521 is driven by the drive mechanism 51 to rotate counterclockwise. At the same time, the drive mechanism 51 drives the air inlet 2 to rotate and descend. The first gear 521 drives the third gear 523 to rotate clockwise. The third gear drives the second gear 522 to rotate counterclockwise. The second gear 522 drives the smoke baffle 3 to rotate downward and open.

[0037] For the closing process of smoke baffle 3, please refer to [link / reference]. Figure 4 The first gear 521 is driven by the drive mechanism 51 to rotate clockwise. At the same time, the drive mechanism 51 drives the air inlet 2 to rotate and rise. The first gear 521 drives the third gear 523 to rotate counterclockwise. The third gear drives the second gear 522 to rotate clockwise. The second gear 522 drives the smoke baffle 3 to rotate upward and close. After the air inlet 2 is retracted into the body, the smoke baffle 3 closes the opening at the bottom of the upper housing assembly 1.

[0038] The aforementioned air inlet 2, smoke baffle 3, and fan can all be controlled by a voice module. A controller, a voice receiving module, and a voice parsing module can be installed on the range hood. The voice receiving module receives user commands, and the voice parsing module parses the commands. Based on the parsed commands, the controller controls the corresponding drive mechanisms of the air inlet 2, smoke baffle 3, and fan to perform corresponding operations, thereby realizing intelligent control of the range hood and improving the user experience.

Claims

1. A range hood, comprising: Upper housing assembly (1); The air inlet (2) is rotatable relative to the upper housing assembly (1). The air inlet (2) is at least partially below the bottom of the upper housing assembly (1) and exposed above the upper housing assembly (1). The air inlet (2) includes a smoke inlet side (21). The smoke baffle (3) can rotate relative to the upper housing assembly (1); as well as A motion mechanism for driving the air inlet (2) and the smoke baffle (3) in linkage includes a drive mechanism (51) and a transmission mechanism. The drive mechanism (51) includes an output end (511). The features are as follows: one end of the air inlet (2) is directly or indirectly connected to the output end (511) and is driven to rotate by the output end (511); the transmission mechanism includes a gear set and a crank (524); one end of the crank (524) is rotatably connected to the upper housing assembly (1); the primary gear of the gear set is driven to rotate by the output end (511); the final gear of the gear set is connected to the crank (524) and rotates synchronously; and the crank (524) is also connected and fixed to the smoke baffle (3).

2. The range hood according to claim 1, characterized in that: The gear set includes a first gear (521), a second gear (522) and a third gear (523). The first gear (521) is a primary gear and is driven by the output end (511). The second gear (522) is a final gear and is connected to the crank (524). The third gear (523) meshes between the first gear (521) and the second gear (522).

3. The range hood according to claim 2, characterized in that: The ratio of the number of teeth between the first gear (521) and the second gear (522) is 3:13:1 to 5:

1.

4. The range hood according to claim 1, characterized in that: On a vertical section extending along the front and rear direction of the range hood, the rotation center of the air inlet (2) is point D, the horizontal distance from point D to the rear side of the upper housing assembly (1) is R, the maximum distance between any point on the air inlet (2) and point D is L2, and R > L2 is satisfied.

5. The range hood according to claim 1, characterized in that: The air inlet (2) can be in a closed state housed in the upper housing assembly (1), at which time the smoke inlet side (21) gradually tilts downward from front to back.

6. The range hood according to claim 4, characterized in that: When the air inlet (2) is in the closed state, the inclination angle between the smoke inlet side (21) and the horizontal direction is β, and β≥3°.

7. The range hood according to claim 1, characterized in that: When the air inlet (2) is in the open state exposed above the upper housing assembly (1), the smoke inlet side (21) gradually tilts downward from front to back.

8. The range hood according to claim 7, characterized in that: When the air inlet (2) is in the open state, the inclination angle between the smoke inlet side (21) and the horizontal direction is α, and α≥30°. The distance between the bottom of the smoke inlet side (21) and the bottom of the upper box assembly (1) is L3, and L3≥90mm.

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