A range hood

Abstract

The application discloses a kind of range hood, including smoke collecting cover, fan frame being arranged on smoke collecting cover and fan being arranged in fan frame, first air inlet and second air inlet are arranged on the smoke collecting cover;The range hood further includes first smoke guide plate and second smoke guide plate;First smoke guide plate and second smoke guide plate can at least be in the following two states: closed state, first smoke guide plate closes first air inlet, second smoke guide plate closes second air inlet, so that the end of two smoke guide plates is mutually close as the first end of each other, and the end of two smoke guide plates is mutually far away as the second end of each other;Opening state, first smoke guide plate and second smoke guide plate are folded to open first air inlet and second air inlet, and first smoke guide plate and second smoke guide plate are at least partially located below smoke collecting cover.

Description

Technical Field

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

[0002] Range hoods have become an indispensable kitchen appliance in modern homes. They operate on the principles of fluid dynamics, using a centrifugal fan inside to draw in cooking fumes and a filter to remove some grease particles. The centrifugal fan consists of a casing, an impeller housed within the casing, and a motor that drives the impeller. As the impeller rotates, a negative pressure is generated at the center of the fan, drawing in the cooking fumes from below. After being accelerated by the fan, the fumes are collected by the casing and guided outdoors.

[0003] Common household stoves typically have two burners, one on the left and one on the right. A type of range hood on the market features two air inlets at the bottom to correspond to the two burners, supposedly improving smoke extraction when both burners are cooking simultaneously. However, in home cooking, sometimes only one burner is used, and sometimes both burners are used simultaneously. Stir-frying, which produces a lot of smoke, often only involves one burner, and since stir-frying generates more smoke, it's more likely for smoke to escape from that side. A common solution is to increase the impeller speed, increasing the total airflow of the range hood. This increased total airflow also increases the airflow to both air inlets, supposedly improving smoke extraction. However, increasing the impeller speed obviously leads to a significant increase in noise, potentially affecting health. Furthermore, since stir-frying typically occurs on one side, increasing the airflow to both sides simultaneously results in wasted energy on the other side.

[0004] Furthermore, after prolonged use, a large amount of grease accumulates inside the range hood, especially in the ductwork, leading to the growth of bacteria and microorganisms, or the production of unpleasant odors, thus adversely affecting the kitchen environment and even the user's health. For example, Chinese Patent Application No. 201410704669.9 discloses a range hood with purification and disinfection functions, which includes ultraviolet lamps and a washing device for cleaning the ultraviolet lamps inside the fan cabinet. However, this patent has the following problems: ① Because the ultraviolet lamps are constantly exposed to oily fumes, grease easily accumulates on the surface of the lamp tubes, reducing their disinfection function. Although a washing device exists, the strong adhesion of oil fumes makes the cleaning effect of the washing device poor, and the washing device is complex to maintain and easily clogged by grease. ② The light source of the lamp tube is in a single position, and the sterilization and disinfection effect decreases where the light is blocked.

[0005] To address the aforementioned issues, the applicant has disclosed several range hoods. For example, Chinese Patent Application No. 201710297953.2 discloses a range hood with sterilization and deodorization functions. This range hood has a sterilization and deodorization component inside its casing, including an ultraviolet lamp and a flap. The flap is rotatably mounted inside the casing and has at least two states: a first state that blocks the ultraviolet lamp from oil fume contamination, and a second state that exposes the ultraviolet lamp inside the casing. Another example is Chinese Patent Application No. 201710297954.7, which discloses a range hood with sterilization and deodorization functions. Its flap can rotate relative to the axis of the ultraviolet lamp, thus blocking the ultraviolet lamp directly above and below it to prevent oil contamination.

[0006] However, the above solutions have the following problems: ① The ultraviolet lamp is always in the same air duct, which cannot irradiate and sterilize the rear cover and bottom of the volute. The oil stains at the rear and bottom of the volute are concentrated, making them a breeding ground for bacteria. ② During the sterilization process, the ultraviolet light is easily blocked by the shielding cover, creating shadows that prevent sterilization. For example, in patent 201710297953.2, the gap between the flap and the fan frame cannot be sterilized due to the flap's obstruction when it is open. In patent 201710297954.7, the flap is located directly above and below the front, easily blocking ultraviolet light and creating local shadows. Summary of the Invention

[0007] The first technical problem to be solved by the present invention is to address the shortcomings of the prior art by providing a range hood that reduces the diffusion of oil fumes and improves the smoke extraction effect based on the wall adhesion effect.

[0008] The second technical problem to be solved by the present invention is to address the shortcomings of the prior art by providing a range hood that can significantly improve the smoke extraction effect and reduce smoke escape when stir-frying on one side.

[0009] The third technical problem to be solved by the present invention is to provide a range hood that can protect the ultraviolet lamp and isolate it from the oil fume environment, in order to address the shortcomings of the prior art.

[0010] The fourth technical problem to be solved by the present invention is to provide a range hood that expands the sterilization and disinfection range, in order to address the shortcomings of the prior art.

[0011] The technical solution adopted by the present invention to solve the first technical problem mentioned above is: a range hood, including a smoke collection hood, a fan frame disposed on the smoke collection hood, and a fan disposed in the fan frame, wherein the smoke collection hood is provided with a first air inlet and a second air inlet arranged on the left and right sides;

[0012] The range hood further includes a first smoke guide plate and a second smoke guide plate; characterized in that:

[0013] The first smoke guide plate and the second smoke guide plate can be in at least two of the following states:

[0014] In the closed state, the first smoke guide plate closes the first air inlet, and the second smoke guide plate closes the second air inlet. The ends of the two smoke guide plates that are close to each other are their respective first ends, and the ends of the two smoke guide plates that are far apart from each other are their respective second ends.

[0015] In the open state, the first smoke guide plate and the second smoke guide plate close together to open the first air inlet and the second air inlet, and the first smoke guide plate and the second smoke guide plate are each at least partially located under the smoke collection hood.

[0016] When open, the smoke guides are located in the path of rising fumes. As the fumes rise, they first encounter the guides and are deflected towards the center by the wall effect of the guides. The fumes then enter the negative pressure zone of each air inlet, thus reducing escape and improving the smoke extraction effect. In addition, when closed, the smoke inlets can be closed to prevent odors from entering the kitchen.

[0017] Furthermore, the second ends of the first and second smoke guide plates are movable relative to the smoke collection hood and are constrained within the smoke collection hood;

[0018] The range hood also includes a motion mechanism, which includes a first drive mechanism. The first drive mechanism causes the first end of the first smoke guide plate and the second smoke guide plate to move to the bottom of the smoke collection hood when the first smoke guide plate and the second smoke guide plate are in the closed state to the open state, thereby allowing each smoke guide plate to switch between the open and closed states.

[0019] Furthermore, the motion mechanism also includes a guide mechanism for constraining the second ends of the first smoke guide plate and the second smoke guide plate, the guide mechanism including a first slide rail and a second slide rail disposed inside the smoke hood, each slide rail extending in the left-right direction, a first slider disposed on the first smoke guide plate, and a second slider disposed on the second smoke guide plate, the first slider slidingly engaging with the first slide rail and disposed at the first end of the first smoke guide plate, the second slider slidingly engaging with the second slide rail and disposed at the first end of the second smoke guide plate, thereby defining the motion trajectory of the second ends of each smoke guide plate.

[0020] Furthermore, a base plate is provided between the two smoke guide plates, and the first end of each smoke guide plate is rotatably connected to the corresponding side of the base plate. The rotation axis of each smoke guide plate extends in the front-rear direction. The first drive mechanism is connected to the base plate and can drive the base plate to rise and fall, thereby driving the two smoke guide plates synchronously.

[0021] Furthermore, the technical solution adopted by the present invention to solve the second technical problem mentioned above is as follows: the motion mechanism further includes a second driving mechanism, which can at least drive the output end of the first driving mechanism to rotate along the front-to-back axis. By adjusting the position of the smoke guide plate, the negative pressure smoke-collecting zone at the air inlet of the range hood is changed, thereby changing the smoke extraction effect of the negative pressure smoke-collecting zone under different states. This does not require increasing the total air volume (i.e., the impeller speed remains unchanged, so there is no increase in noise or energy consumption), thus solving the problem of significantly improving the smoke extraction effect on the same side of the range hood during unilateral stir-frying, reducing smoke escape.

[0022] Furthermore, the upper surface of the base plate is equipped with an ultraviolet sterilization device, which can sterilize and disinfect the inside of the range hood.

[0023] Furthermore, the technical solution adopted by the present invention to solve the above-mentioned third technical problem is as follows: the first smoke guide plate includes a first smoke guide plate body and a first surrounding plate surrounding the outer peripheral edge of the first smoke guide plate body; the second smoke guide plate includes a second smoke guide plate body and a second surrounding plate surrounding the outer peripheral edge of the second smoke guide plate body.

[0024] In the closed state, the first smoke guide plate body closes the first air inlet, the first enclosure extends into the smoke collection hood, the second smoke guide plate body closes the second air inlet, and the second enclosure extends into the smoke collection hood;

[0025] In the open state, the first and second smoke guide plates close together to form a closed space, and the ultraviolet sterilization device is located within this closed space.

[0026] Thus, the closing of the smoke guide plate forms a shielding structure with a sealed cavity, thereby isolating the ultraviolet sterilization device from the oil fume environment during cooking and protecting the ultraviolet sterilization device.

[0027] Furthermore, in the closed state, the ultraviolet sterilization device can rotate relative to the base plate. By rotating the ultraviolet sterilization device when the smoke guide plate is closed, different positions are irradiated during the rotation, thereby reducing the problem of light blockage.

[0028] Furthermore, the technical solution adopted by the present invention to solve the above-mentioned fourth technical problem is as follows: the fan is a centrifugal fan with its axis extending in the left-right direction; the fan frame is divided into left and right air ducts by the fan; and the rotation axis of the ultraviolet sterilization device extends in the front-back direction. By deflecting the ultraviolet sterilization device to the two air ducts, it can irradiate the left, right, and bottom of the fan, thereby achieving sterilization and disinfection of both air ducts and the bottom of the fan.

[0029] Furthermore, the motion mechanism also includes a second drive mechanism and a clutch device, wherein the second drive mechanism can at least drive the output end of the first drive mechanism to rotate along a front-to-back axis;

[0030] The clutch device includes an upper clutch part, a lower clutch part, and a movable part. The lower clutch part is fixed on the base plate, the upper clutch part is rotatably connected to the lower clutch part, and the movable part is fixed to the output end of the first drive mechanism and can slide within the upper clutch part and the lower clutch part.

[0031] The ultraviolet sterilization device includes an ultraviolet lamp, which moves synchronously with the upper part of the clutch. This allows a single set of motion mechanisms to drive all the smoke guide plates and the ultraviolet sterilization device, resulting in a simple and stable structure.

[0032] Furthermore, the ultraviolet sterilization device also includes a support leg and a base. The ultraviolet lamp is connected to the base via the support leg, and the base is fixed to the base plate. The support leg and the base are rotatably connected via a rotating shaft, thereby achieving the deflection of the ultraviolet lamp.

[0033] Furthermore, to facilitate the rotational connection between the upper and lower clutch parts, the rotating shaft also passes through the upper and lower clutch parts, and the rotating shaft is fixed to the support foot and the upper clutch part respectively.

[0034] Furthermore, to facilitate the movement of the moving part between the upper clutch and the lower clutch, a first groove is formed on the upper clutch and a second groove is formed on the lower clutch. The two grooves extend vertically and are positioned correspondingly. The first groove passes through the bottom of the upper clutch and the second groove passes through the top of the lower clutch. The moving part slides along the first groove and the second groove.

[0035] Compared with the prior art, the advantages of the present invention are as follows: In the open state, since each smoke guide plate is located in the path of the rising oil fumes, the oil fumes will first encounter each smoke guide plate during the rising process. Under the effect of the wall adhesion of each smoke guide plate, the oil fumes are deflected to the center, and then the oil fumes deflected to the center enter the negative pressure zone of each air inlet, thereby reducing escape and improving the smoke extraction effect; In addition, in the closed state, the smoke extraction port can be closed to prevent odors from entering the kitchen. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the closed state of the range hood according to an embodiment of the present invention;

[0037] Figure 2 This is a cross-sectional view of the range hood in the closed state according to an embodiment of the present invention;

[0038] Figure 3 This is a schematic diagram of the concealed fan frame, fan, and smoke collection hood of a range hood according to an embodiment of the present invention;

[0039] Figure 4 This is a schematic diagram of the range hood in the open state according to an embodiment of the present invention;

[0040] Figure 5 This is a cross-sectional view of the range hood in the open state according to an embodiment of the present invention;

[0041] Figure 6 This is a schematic diagram of the uniform left-right air intake state of the range hood according to an embodiment of the present invention;

[0042] Figure 7 This is a schematic diagram of the range hood with a smaller air intake on the left and a larger air intake on the right, according to an embodiment of the present invention.

[0043] Figure 8 This is a schematic diagram of the ultraviolet sterilization device and its moving mechanism of a range hood according to an embodiment of the present invention;

[0044] Figure 9 This is a partial cross-sectional view (in the "separated" state) of the ultraviolet sterilization device and its moving mechanism of the range hood according to an embodiment of the present invention;

[0045] Figure 10 This is a partial cross-sectional view (in the "closed" state) of the ultraviolet sterilization device and its moving mechanism of the range hood according to an embodiment of the present invention;

[0046] Figure 11 This is a schematic diagram of the sterilization state of the range hood according to an embodiment of the present invention. Detailed Implementation

[0047] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions.

[0048] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and 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 invention 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.

[0049] See Figures 1-4 A range hood, specifically a top-mounted range hood, includes a smoke collection hood 1, a fan frame 2 mounted on the smoke collection hood 1, and a fan 3 disposed within the fan frame 2. Preferably, the fan 3 is a centrifugal fan and a dual-inlet fan, with its axis extending in the left-right direction, thereby oriented its two air inlets towards the left and right sides respectively. The fan 3 can be positioned in the middle within the fan frame 2.

[0050] The fume hood 1 has a first air inlet 11 and a second air inlet 12 arranged horizontally, with the first air inlet 11 located to the left of the second air inlet 12. The fume hood 1 can be flat (with a small thickness in the vertical direction), so that the fumes drawn in through each air inlet directly enter the fan frame 2, unlike common range hoods where the fumes accumulate inside the fume hood 1 and then enter the fan frame 2. The range hood also includes a first smoke guide plate 41 for opening and closing the first air inlet 11 and a second smoke guide plate 42 for opening and closing the second air inlet 12. A base plate 43 is provided between the two smoke guide plates, and each smoke guide plate is rotatably connected to the corresponding side of the base plate 43, with the rotation axis of each smoke guide plate extending in the front-to-back direction. In this embodiment, each smoke guide plate and the base plate 43 are rotatably connected by a hinge 44.

[0051] The first smoke guide plate 41 includes a first smoke guide plate body 411 and a first surrounding plate 412 surrounding the outer periphery of the first smoke guide plate body 411. The second smoke guide plate 42 includes a second smoke guide plate body 421 and a second surrounding plate 422 surrounding the outer periphery of the second smoke guide plate body 421. Both the smoke guide plate body and the surrounding plate are flat. The first surrounding plate 412 has at least three surrounding plates respectively surrounding the front and rear sides and the left side edge of the first smoke guide plate body 411, making the first smoke guide plate 41 a hollow cover. The second surrounding plate 422 has at least three surrounding plates respectively surrounding the front and rear sides and the right side edge of the second smoke guide plate body 421, making the second smoke guide plate 42 a hollow cover. Preferably, both the first smoke guide plate 41 and the second smoke guide plate 42 are integral structures.

[0052] The first smoke guide plate 41 and the second smoke guide plate 42 can be in at least two states: a closed state and an open state. In the closed state, the first smoke guide plate 41 and the second smoke guide plate 42 are at their maximum angle relative to the bottom plate 43. The first smoke guide plate 41 closes the first air inlet 11, and the body of the first smoke guide plate 411 can be flush with the bottom of the first air inlet 11 and closed. The first enclosure plate 412 extends into the smoke hood 1 and the fan frame 2, so that the first smoke guide plate 41 is open on the side facing the fan frame 2. The second smoke guide plate 42 closes the second air inlet 12, and the body of the second smoke guide plate 421 can be flush with the bottom of the second air inlet 12 and closed. The second enclosure plate 422 extends into the smoke hood 1 and the fan frame 2, so that the second smoke guide plate 42 is open on the side facing the fan frame 2. This closed state prevents odors from entering the kitchen. Preferably, each smoke guide plate can engage with the smoke collection hood 1. The engagement method can be a common snap-fit ​​connection, etc., and the engagement structure is not shown in the figure. The ends of the first smoke guide plate 41 and the second smoke guide plate 42 that are close to each other are their respective first ends, and the ends that are far apart from each other are their respective second ends. The first end of each smoke guide plate is rotatably connected to the base plate 43.

[0053] An ultraviolet (UV) sterilization device 5 is installed on the upper surface of the base plate 43. When closed, the UV sterilization device 5 is at least partially located within the fan frame 2 (primarily ensuring that the UV lamp 51 described below is located within the fan frame 2). This allows for sterilization of the fan frame 2 even with the air inlet closed, while also preventing UV damage to the user. Alternatively, the UV sterilization device 5 can also operate within the fume hood 1. The UV sterilization device 5 is positioned below the bottom of the fan 3. The first air inlet 11 and the second air inlet 12 are connected, allowing the UV sterilization device 5 to enter the fan frame 2 through the fume hood 1.

[0054] The range hood also includes a motion mechanism for driving the first smoke guide plate 41, the second smoke guide plate 42, and the ultraviolet sterilization device 5. The motion mechanism includes a first drive mechanism 61, a second drive mechanism 62, and a clutch device 63. The first drive mechanism 61 is a linear drive module, which can be any existing linear drive module in the art, preferably an electric push rod. It is mounted on the fan frame 2 via the second drive mechanism 62. The second drive mechanism 62 is a rotary drive module used to drive the electric push rod (especially its output end) to rotate along a front-to-back extending axis. The second drive mechanism 62 is preferably a motor. The output end of the first drive mechanism 61 is connected to the base plate 43, thereby driving the base plate 43 to rise and fall.

[0055] The motion mechanism also includes a guide mechanism that movably constrains the second ends of the two smoke guide plates within the smoke collection hood 1 relative to it. The guide mechanism includes a first slide rail 641 and a second slide rail 642 disposed inside the smoke collection hood 1. Each slide rail extends in the left-right direction and may have two rails arranged front-to-back. A first slider 643 is disposed on the first smoke guide plate 41, and a second slider 644 is disposed on the second smoke guide plate 42. The first slider 643 is slidably engaged with the first slide rail 641 and is disposed at the end of the first smoke guide plate 41 away from the second smoke guide plate 42 when the first smoke guide plate 41 is closed. The second slider 644 is slidably engaged with the second slide rail 642 and is disposed at the end of the second smoke guide plate 42 away from the first smoke guide plate 41 when the second smoke guide plate 42 is closed. Thus, through the cooperation of each slider and the corresponding slide rail, the movement trajectory of the corresponding smoke guide plate can be limited when the base plate 43 is raised or lowered.

[0056] Alternatively, the base plate 43 can be omitted (mainly for the convenience of setting up the ultraviolet sterilization device 5 and driving the two smoke guide plates), and a hinge or the like can be used instead of the base plate 43, or two first drive mechanisms 61 can be set up that are respectively connected to the first end of one of the smoke guide plates.

[0057] See Figure 4 and Figure 5 When the push rod of the first drive mechanism 61 extends and drives the bottom plate 43 to descend, the first smoke guide plate 41 and the second smoke guide plate 42 rotate towards each other. When the bottom plate 43 is driven to a certain position, the first smoke guide plate 41 and the second smoke guide plate 42 close together to form a closed space. The ultraviolet sterilization device 5 is enclosed in this space, so that even if the first air inlet 11 and the second air inlet 12 are in the open state (cooking state), they can be prevented from being contaminated by oil fumes.

[0058] See Figure 6 The arrows indicate the path of rising fumes. In dual-burner cooking mode, the two smoke guides are closed and at least partially located under the smoke collection hood 1, preferably in the middle of the two air inlets, in the path of rising fumes. At this time, the fumes will first encounter the smoke guides during the rising process. Under the wall adhesion effect of the smoke guides, the fumes will deflect towards the middle, and then the fumes deflected towards the middle will enter the negative pressure zone of each air inlet, thereby reducing escape and improving the smoke extraction effect.

[0059] See Figure 7 The arrows indicate the path of rising fumes. When the amount of cooking fumes on the left is less than that on the right, such as when rice is steamed on the left and stir-fried on the right, the second drive mechanism 62 drives the first drive mechanism 61 to deflect to the left. At the same time, the push rod of the first drive mechanism 61 extends again, causing the two smoke guide plates to deflect to the left as a whole. At this time, the negative pressure zone on the left decreases and the negative pressure zone on the right increases, thus improving the smoke extraction effect on the right.

[0060] Because the fan frame 2 is divided into left and right air ducts by the fan 3, and the ultraviolet sterilization device 5 is located below the fan 3, if the position of the ultraviolet sterilization device 5 is fixed, it is impossible to sterilize and disinfect both air ducts. Therefore, to facilitate sterilization and disinfection of both air ducts, see [reference needed]. Figure 8 The motion mechanism includes the aforementioned clutch device 63, which includes an upper clutch portion 631, a lower clutch portion 632, and a moving portion 633. The ultraviolet sterilization device 5 includes an ultraviolet lamp 51, legs 52, and a base 53. The ultraviolet lamp 51 extends forward and backward. There are two legs 52 and two bases 53. The front and rear sides of the ultraviolet lamp 51 are connected to the base 53 via the legs 52. The bases 53 are fixed to the base plate 43 at intervals. The output end of the first drive mechanism 61 and the clutch device 63 are positioned adjacent to one of the bases 53. In this embodiment, the clutch device 63 is adjacent to the front base 53. The rear legs 52 and base 53 are rotatably connected, and the front legs 52 and base 53 are rotatably connected via a rotating shaft 54. The rotating shaft 54 ​​extends forward and backward through the legs 52 and base 53, and is fixed to the legs 52 but can rotate relative to the base 53.

[0061] The upper clutch portion 631 is fixed to the rotating shaft 54 ​​and can move synchronously. The lower clutch portion 632 is fixed to the base plate 43. A first sliding groove 6311 is formed on the upper clutch portion 631, and a second sliding groove 6321 is formed on the lower clutch portion 632. The two sliding grooves extend vertically and are positioned correspondingly. The first sliding groove 6311 penetrates the bottom of the upper clutch portion 631, and the second sliding groove 6321 penetrates the top of the lower clutch portion 632. The output end of the first drive mechanism 61 is connected to the upper clutch portion 631 through a moving part 633, which can slide along the first sliding groove 6311 and the second sliding groove 6321. The upper clutch portion 631 and the lower clutch portion 632 are rotatably connected, with a rotating shaft extending forward and backward. As shown in this embodiment, the rotatable connection can be achieved by a rotating shaft 54 ​​passing through the lower clutch portion 632 and the upper clutch portion 631. The rotating shaft 54 ​​can rotate relative to the lower clutch portion 632 around its own axis, and the rotating shaft 54 ​​is fixed to the upper clutch portion 631. Thus, the rotation center of the support leg 52 coincides with the rotation center of the upper clutch portion 631. When the upper clutch portion 631 rotates, the rotating shaft 54 ​​rotates synchronously, thereby driving the ultraviolet lamp 51 to rotate together via the support leg 52.

[0062] See Figure 9 At this time, the moving part 633 is located within the upper clutch part 631, and the first drive mechanism 61 is in a retracted state. In this state, the ultraviolet sterilization device 5 and each smoke guide plate are in a "disengaged" state. If the second drive mechanism 62 is activated, it will only drive the ultraviolet lamp 51 to rotate, while the smoke guide plates will not move. See also Figure 11The second drive mechanism 62 drives the first drive mechanism 61 to deflect to the left. Simultaneously, the push rod of the first drive mechanism 61 extends. Under the action of the first drive mechanism 61 (through the moving part 633 acting on the upper clutch 631), the ultraviolet lamp 51 deflects to the left, as indicated by the arrow, to sterilize the air duct on the left side of the fan 3. Conversely, it can sterilize the air duct on the right side of the fan 3. During this process, the moving part 633 remains within the upper clutch 631.

[0063] In the closed state, the moving part 633 is located within the upper clutch part 631. After the first drive mechanism 61 is activated, its push rod gradually extends, and the moving part 633 moves into the lower clutch part 632. (See below) Figure 10 The first drive mechanism 61 is in an extended state. In this state, the ultraviolet sterilization device 5 and each smoke guide plate are in a "closed" state. The continued extension of the first drive mechanism 61 can push the bottom plate 43 to the lowest position, so that each air inlet is opened. The continued extension of the first drive mechanism 61 and the rotation of the second drive mechanism 62 both drive the ultraviolet sterilization device 5 and each smoke guide plate to move synchronously.

Claims

1. A range hood, comprising a smoke collection hood (1), a fan frame (2) disposed on the smoke collection hood (1), and a fan (3) disposed in the fan frame (2), wherein the smoke collection hood (1) is provided with a first air inlet (11) and a second air inlet (12) arranged on the left and right sides; The range hood further includes a first smoke guide plate (41) and a second smoke guide plate (42); characterized in that: The first smoke guide plate (41) and the second smoke guide plate (42) can be in at least the following two states: In the closed state, the first smoke guide plate (41) closes the first air inlet (11), and the second smoke guide plate (42) closes the second air inlet (12). The ends of the two smoke guide plates that are close to each other are their respective first ends, and the ends of the two smoke guide plates that are far apart from each other are their respective second ends. In the open state, the first smoke guide plate (41) and the second smoke guide plate (42) close together to open the first air inlet (11) and the second air inlet (12), and the first smoke guide plate (41) and the second smoke guide plate (42) are each at least partially located under the smoke collection hood (1); The second ends of the first smoke guide plate (41) and the second smoke guide plate (42) can move relative to the smoke collection hood (1) and are constrained within the smoke collection hood (1); The range hood also includes a motion mechanism, which includes a first drive mechanism (61). The first drive mechanism (61) causes the first smoke guide plate (41) and the second smoke guide plate (42) to move to the bottom of the smoke collection hood (1) when the first smoke guide plate (41) and the second smoke guide plate (42) are in the closed state to the open state. The motion mechanism further includes a guide mechanism for constraining the second ends of the first smoke guide plate (41) and the second smoke guide plate (42). The guide mechanism includes a first slide rail (641) and a second slide rail (642) disposed inside the smoke hood (1). Each slide rail extends in the left-right direction. A first slider (643) is disposed on the first smoke guide plate (41), and a second slider (644) is disposed on the second smoke guide plate (42). The first slider (643) slides with the first slide rail (641) and is disposed at the second end of the first smoke guide plate (41). The second slider (644) slides with the second slide rail (642) and is disposed at the second end of the second smoke guide plate (42).

2. The range hood according to claim 1, characterized in that: A base plate (43) is provided between the two smoke guide plates. The first end of each smoke guide plate is rotatably connected to the corresponding side of the base plate (43). The rotation axis of each smoke guide plate extends in the front-back direction. The first drive mechanism (61) is connected to the base plate (43) and can drive the base plate (43) to rise and fall.

3. The range hood according to claim 2, characterized in that: The motion mechanism further includes a second drive mechanism (62), which can at least drive the output end of the first drive mechanism (61) to rotate along an axis extending forward and backward.

4. The range hood according to claim 2, characterized in that: The upper surface of the base plate (43) is provided with an ultraviolet sterilization device (5).

5. The range hood according to claim 4, characterized in that: The first smoke guide plate (41) includes a first smoke guide plate body (411) and a first surrounding plate (412) surrounding the outer periphery of the first smoke guide plate body (411). The second smoke guide plate (42) includes a second smoke guide plate body (421) and a second surrounding plate (422) surrounding the outer periphery of the second smoke guide plate body (421). In the closed state, the first smoke guide plate body (411) closes the first air inlet (11), the first enclosure plate (412) extends into the smoke collection hood (1), the second smoke guide plate body (421) closes the second air inlet (12), and the second enclosure plate (422) extends into the smoke collection hood (1). In the open state, the first smoke guide plate (41) and the second smoke guide plate (42) close together to form a closed space, and the ultraviolet sterilization device (5) is located in the closed space.

6. The range hood according to claim 4, characterized in that: In the off state, the ultraviolet sterilization device (5) can rotate relative to the base plate (43).

7. The range hood according to claim 6, characterized in that: The fan (3) is a centrifugal fan with its axis extending in the left-right direction. The fan frame (2) is divided into two air ducts, left and right, by the fan (3). The rotation axis of the ultraviolet sterilization device (5) extends in the front-back direction.

8. The range hood according to claim 7, characterized in that: The motion mechanism further includes a second drive mechanism (62) and a clutch device (63), wherein the second drive mechanism (62) can at least drive the output end of the first drive mechanism (61) to rotate along a front-to-back axis; The clutch device (63) includes an upper clutch part (631), a lower clutch part (632), and a moving part (633). The lower clutch part (632) is fixed on the base plate (43). The upper clutch part (631) and the lower clutch part (632) are rotatably connected. The moving part (633) is fixed to the output end of the first drive mechanism (61) and can slide within the upper clutch part (631) and the lower clutch part (632). The ultraviolet sterilization device (5) includes an ultraviolet lamp (51), which moves synchronously with the upper clutch (631).

9. The range hood according to claim 8, characterized in that: The ultraviolet sterilization device (5) also includes a support leg (52) and a base (53). The ultraviolet lamp (51) is connected to the base (53) through the support leg (52). The base (53) is fixed on the base plate (43). The support leg (52) and the base (53) are rotatably connected through a rotating shaft (54).

10. The range hood according to claim 9, characterized in that: The rotating shaft (54) also passes through the upper clutch part (631) and the lower clutch part (632), and the rotating shaft (54) is fixed to the support leg (52) and the upper clutch part (631) respectively.

11. The range hood according to claim 8, characterized in that: A first groove (6311) is formed on the upper clutch part (631), and a second groove (6321) is formed on the lower clutch part (632). The two grooves extend vertically and are positioned correspondingly. The first groove (6311) penetrates the bottom of the upper clutch part (631), and the second groove (6321) penetrates the top of the lower clutch part (632). The moving part (633) slides along the first groove (6311) and the second groove (6321).

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