CN117006489A - Fume exhauster - Google Patents

Abstract

The application discloses a range hood, which comprises a fume collecting hood, a fan frame arranged above the fume collecting hood and a fan arranged in the fan frame, wherein a first air inlet and a second air inlet which are arranged left and right are formed in the fume collecting hood; the range hood further comprises a first smoke guide plate and a second smoke guide plate; the first smoke guide plate and the second smoke guide plate can be at least in the following two states: the first air inlet is closed by the first smoke guide plate, the second air inlet is closed by the second smoke guide plate, the end parts of the two smoke guide plates, which are close to each other, are respectively first end parts, and the end parts of the two smoke guide plates, which are far away from each other, are respectively second end parts; and in an open state, the first smoke guide plate and the second smoke guide plate are folded to open the first air inlet and the second air inlet, and the first smoke guide plate and the second smoke guide plate are respectively positioned at least partially below the smoke collecting hood.

Description

Fume exhauster

Technical Field

The application relates to a lampblack purifying device, in particular to a range hood.

Background

The range hood has become one of the indispensable kitchen appliances in modern families. The range hood works by utilizing the fluid dynamics principle, and the range hood sucks and discharges oil smoke through a centrifugal fan arranged in the range hood and filters part of grease particles by using a filter screen. The centrifugal fan comprises a volute, an impeller arranged in the volute and a motor for driving the impeller to rotate. When the impeller rotates, negative pressure suction is generated at the center of the fan, and oil smoke below the range hood is sucked into the fan and is collected by the volute after being accelerated by the fan to be guided to be discharged out of the room.

The two burners of common household kitchen ranges are generally divided into left and right, and two air inlets are arranged at the bottom of the range hood in order to correspond to the two burners of the kitchen ranges in the market, so that the smoking effect of the two burners during simultaneous cooking can be improved. However, in household cooking, sometimes only one side of the burner is used, sometimes both sides are used simultaneously, and the stir-frying cooking capable of generating a large amount of oil smoke is often only on one side, and the oil smoke generated by the stir-frying cooking is larger, so that the condition of escaping oil smoke is easier to occur on the stir-frying side, the common solution is to increase the rotating speed of the impeller, so that the total air quantity of the range hood is increased, the air quantity of the air inlets on both sides of the range hood is increased simultaneously, and further the oil smoke absorbing effect is improved. Obviously, the improvement of impeller rotational speed will lead to the noise to increase by a wide margin, influences people's healthy, and the quick-fried of actual culinary art takes place in one side, and the both sides promote the amount of wind simultaneously and lead to the energy consumption waste of other one side.

In addition, after the range hood is used for a long time, a large amount of oil stains are accumulated in the range hood, particularly in an air duct, so that bacterial microorganisms and the like are bred, or peculiar smell is generated, and the kitchen environment and even the body health of a user are adversely affected. A range hood with purification and disinfection functions as disclosed in chinese patent application No. 201410704669.9, wherein an ultraviolet lamp and a washing device for washing the ultraviolet lamp are arranged in a wind cabinet. However, this patent has the following problems: (1) because ultraviolet lamp is in the oil smoke environment for a long time, the surface of the lamp tube is easy to accumulate greasy dirt, so that the disinfection function is reduced, and although the leaching device exists, the adhesion of the oil smoke is strong, the cleaning effect of the leaching device is poor, and the leaching device is complex to maintain and is easy to be blocked by the greasy dirt. (2) The light source position of the lamp tube is unique, and the sterilization effect of the position where the light is blocked is reduced.

In order to solve the above problems, the present inventors have disclosed some range hoods, such as a range hood having a sterilizing and deodorizing function disclosed in chinese patent application No. 201710297953.2, in which a sterilizing and deodorizing assembly including an ultraviolet lamp and a flap is provided inside a cabinet of the range hood, the flap being rotatably installed in the cabinet, the flap having at least two states, a first state capable of shielding the ultraviolet lamp from soot, and a second state exposing the ultraviolet lamp in the cabinet; as disclosed in the chinese patent with application number 201710297954.7, the flap of the range hood with sterilization and deodorization functions can rotate relative to the axis of the ultraviolet lamp so as to cover the upper part and the lower part of the ultraviolet lamp, so as to avoid the pollution of the oil stain to the ultraviolet lamp.

However, the above-described scheme has problems in that: (1) the ultraviolet lamp is always in the same air duct, so that the rear cover of the volute and the bottom of the volute cannot be irradiated and sterilized, oil stains at the rear part and the bottom of the volute are concentrated, and the ultraviolet lamp is also a disaster area for bacteria breeding. (2) In the sterilization process, ultraviolet light is easily shielded by the shielding cover, and a shadow surface is generated, so that sterilization cannot be irradiated. The gap between the turning plate and the fan frame in the opening state of the turning plate in the patent 201710297953.2 cannot be irradiated and sterilized due to the shielding of the turning plate, and the turning plate in the patent 201710297954.7 is positioned right above and right below the front part and is easy to shield ultraviolet light, so that partial shadows are formed.

Disclosure of Invention

The first technical problem to be solved by the application is to provide a range hood, which aims at overcoming the defects existing in the prior art, reduces the diffusion of oil smoke based on the coanda effect and improves the smoking effect.

The second technical problem to be solved by the application is to provide the range hood aiming at the defects in the prior art, and the same side of the range hood corresponding to the range hood can greatly improve the oil fume suction effect and reduce the escape of oil fume when the single side is stir-fried for cooking.

The third technical problem to be solved by the application is to provide a range hood which can protect ultraviolet lamps and isolate the ultraviolet lamps from the lampblack environment aiming at the defects existing in the prior art.

The fourth technical problem to be solved by the application is to provide a range hood for enlarging the sterilization and disinfection range aiming at the defects existing in the prior art.

The technical scheme adopted by the application for solving the first technical problem is as follows: the range hood comprises a fume collecting hood, a fan frame arranged above the fume collecting hood and a fan arranged in the fan frame, wherein a first air inlet and a second air inlet which are arranged left and right are formed in the fume collecting hood;

the range hood further comprises a first smoke guide plate and a second smoke guide plate; the method is characterized in that:

the first smoke guide plate and the second smoke guide plate can be at least in the following two states:

the first air inlet is closed by the first smoke guide plate, the second air inlet is closed by the second smoke guide plate, the end parts of the two smoke guide plates, which are close to each other, are respectively first end parts, and the end parts of the two smoke guide plates, which are far away from each other, are respectively second end parts;

and in an open state, the first smoke guide plate and the second smoke guide plate are folded to open the first air inlet and the second air inlet, and the first smoke guide plate and the second smoke guide plate are respectively positioned at least partially below the smoke collecting hood.

In the open state, as each smoke guide plate is positioned in the path of the lampblack rising, the lampblack can meet each smoke guide plate in the lampblack rising process, the lampblack deflects towards the middle under the action of the wall attaching effect of each smoke guide plate, and then the lampblack deflected towards the middle enters the negative pressure area of each air inlet, so that escape is reduced, and the smoking effect is improved; in addition, in the closed state, the smoking opening can be closed, and the peculiar smell is prevented from being transmitted to a kitchen.

Further, the second ends of the first and second smoke-guiding plates are movable relative to and constrained within the smoke-collecting hood;

the range hood further comprises a movement mechanism, the movement mechanism comprises a first driving mechanism, when the first driving mechanism enables the first smoke guide plate and the second smoke guide plate to move from a closed state to an open state, the first end parts of the first smoke guide plate and the second smoke guide plate respectively move to the lower part of the smoke collecting hood, and therefore the smoke guide plates can be switched between the open state and the closed state.

Further, the motion mechanism further comprises a guide mechanism for restraining the second end parts of the first smoke guide plate and the second smoke guide plate, the guide mechanism comprises a first sliding rail and a second sliding rail which are arranged on the inner side of the smoke collecting hood, each sliding rail extends along the left-right direction, a first sliding block is arranged on the first smoke guide plate, a second sliding block is arranged on the second smoke guide plate, the first sliding block is in sliding fit with the first sliding rail and is arranged at the first end part of the first smoke guide plate, and the second sliding block is in sliding fit with the second sliding rail and is arranged at the first end part of the second smoke guide plate, so that the motion track of the second end part of each smoke guide plate is limited.

Further, a bottom plate is arranged between the two smoke guide plates, the first end of each smoke guide plate is respectively and rotatably connected with the corresponding side of the bottom plate, and the rotation axis of each smoke guide plate extends in the front-rear direction; the first driving mechanism is in transmission connection with the bottom plate and can drive the bottom plate to lift, so that the two smoke guide plates can be synchronously driven.

Further, the technical scheme adopted by the application for solving the second technical problem is as follows: the motion mechanism also comprises a second driving mechanism, and the second driving mechanism can at least drive the output end of the first driving mechanism to rotate along the axis extending forwards and backwards. Through the regulation to the smoke guide plate position to change the negative pressure cage cigarette district of range hood air intake department, and then change the smoking effect in negative pressure cage cigarette district under the different states, need not promote total amount of wind (impeller rotational speed is unchangeable, can not increase the noise, does not increase the energy consumption) in order to solve when unilateral quick-fry culinary art, the homonymy of range hood that corresponds with it can promote the oil smoke effect by a wide margin, reduces the oil smoke escape.

Further, the upper surface of the bottom plate is provided with an ultraviolet sterilization device, so that the interior of the range hood can be sterilized.

Further, the technical scheme adopted by the application for solving the third technical problem is as follows: the first smoke guide plate comprises a first smoke guide plate body and a first coaming which is arranged around the peripheral edge of the first smoke guide plate body, and the second smoke guide plate comprises a second smoke guide plate body and a second coaming which is arranged around the peripheral edge of the second smoke guide plate body;

in a closed state, the first smoke guide plate body closes the first air inlet, the first coaming extends into the smoke collecting hood, the second smoke guide plate body closes the second air inlet, and the second coaming extends into the smoke collecting hood;

in the open state, the first smoke guide plate and the second smoke guide plate are folded to form an enclosed space, and the ultraviolet sterilization device is positioned in the enclosed space.

Therefore, a shielding structure with a closed cavity is formed by folding the smoke guide plate, so that the ultraviolet sterilization device is isolated from the oil smoke environment in the cooking process, and the ultraviolet sterilization device is protected.

Further, in the closed state, the ultraviolet sterilization device can rotate relative to the bottom plate. The ultraviolet sterilization device rotates when the smoke guide plate is in a closed state, and irradiates different positions in the rotating process, so that the problem that light is blocked is solved.

Further, the technical scheme adopted by the application for solving the fourth technical problem is as follows: the fan is a centrifugal fan with an axis extending in the left-right direction, the inside of the fan frame is divided into a left air channel and a right air channel by the fan, and the rotation axis of the ultraviolet sterilization device extends in the front-back direction. The ultraviolet sterilizing device deflects towards the air channels at two sides, so that the left side, the right side and the bottom of the fan can be irradiated, and the double air channels and the bottom of the fan can be sterilized and disinfected.

Further, the motion mechanism also comprises a second driving mechanism and a clutch device, wherein the second driving mechanism at least can drive the output end of the first driving mechanism to rotate along an axis extending forwards and backwards;

the clutch device comprises a clutch upper part, a clutch lower part and a moving part, wherein the clutch lower part is fixed on the bottom plate, the clutch upper part is rotationally connected with the clutch lower part, and the moving part is fixed with the output end of the first driving mechanism and can slide in the clutch upper part and the clutch lower part;

the ultraviolet sterilization device comprises an ultraviolet lamp, and the ultraviolet lamp and the clutch upper part synchronously move. Therefore, the same set of movement mechanism can drive each smoke guide plate and the ultraviolet sterilization device, and the structure is simple and stable.

Further, the ultraviolet sterilization device further comprises a supporting foot and a base, the ultraviolet lamp is connected with the base through the supporting foot, the base is fixed on the bottom plate, and the supporting foot and the base are in rotary connection through a rotary shaft, so that deflection of the ultraviolet lamp is achieved.

Further, in order to facilitate the rotational connection of the clutch upper portion and the clutch lower portion, the rotating shaft also penetrates the clutch upper portion and the clutch lower portion, and the rotating shaft is fixed with the support leg and the clutch upper portion, respectively.

Further, in order to guide the movement portion to move between the clutch upper portion and the clutch lower portion, a first chute is formed in the clutch upper portion, a second chute is formed in the clutch lower portion, the two chutes extend up and down and correspond to each other in position, the first chute penetrates through the bottom of the clutch upper portion, the second chute penetrates through the top of the clutch lower portion, and the movement portion slides along the first chute and the second chute.

Compared with the prior art, the application has the advantages that: in the open state, as each smoke guide plate is positioned in the path of the lampblack rising, the lampblack can meet each smoke guide plate in the lampblack rising process, the lampblack deflects towards the middle under the action of the wall attaching effect of each smoke guide plate, and then the lampblack deflected towards the middle enters the negative pressure area of each air inlet, so that escape is reduced, and the smoking effect is improved; in addition, in the closed state, the smoking opening can be closed, and the peculiar smell is prevented from being transmitted to a kitchen.

Drawings

Fig. 1 is a schematic view of a closed state of a range hood according to an embodiment of the present application;

fig. 2 is a sectional view showing a closed state of the range hood according to the embodiment of the present application;

fig. 3 is a schematic view of a hidden fan frame, a fan and a smoke collecting hood of the range hood according to an embodiment of the present application;

fig. 4 is a schematic view illustrating an opened state of a range hood according to an embodiment of the present application;

fig. 5 is a sectional view showing an opened state of the range hood according to the embodiment of the present application;

fig. 6 is a schematic diagram of a left-right uniform air intake state of the range hood according to the embodiment of the application;

fig. 7 is a schematic diagram of a left small-side and right large-side air intake state of the range hood according to the embodiment of the application;

fig. 8 is a schematic view of an ultraviolet sterilization device and a movement mechanism of a range hood according to an embodiment of the present application;

fig. 9 is a partial cross-sectional view of an ultraviolet sterilization apparatus and a movement mechanism thereof of a range hood according to an embodiment of the present application ("off" state);

fig. 10 is a partial cross-sectional view of an ultraviolet sterilizing apparatus and a moving mechanism thereof of a range hood according to an embodiment of the present application (a "closed" state);

fig. 11 is a schematic view illustrating a sterilization state of a range hood according to an embodiment of the present application.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions.

In the description of the present application, 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", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for purposes of describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and because the disclosed embodiments of the present application may be arranged in different orientations, these directional terms are merely for illustration and should not be construed as limitations, such as "upper", "lower" are not necessarily limited to orientations opposite or coincident with the direction of gravity. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly.

Referring to fig. 1 to 4, a range hood is a top-draft range hood, and comprises a fume collecting hood 1, a fan frame 2 arranged above the fume collecting hood 1, and a fan 3 arranged in the fan frame 2. Preferably, the fan 3 is a centrifugal fan and is a double air intake fan, the axis of which extends in the left-right direction, whereby the two air inlets of the fan 3 are directed to the left and right, respectively. The blower 3 may be disposed at an intermediate position within the blower housing 2.

The fume collecting hood 1 is provided with a first air inlet 11 and a second air inlet 12 which are arranged left and right, wherein the first air inlet 11 is positioned at the left side of the second air inlet 12. The fume collecting hood 1 may be flat (the thickness in the up-down direction is smaller), and thus, the fume sucked through each air inlet directly enters the blower frame 2, unlike a common range hood, and the fume enters the inner space of the fume collecting hood 1 to be collected into the blower frame 2. The range hood further comprises 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 bottom plate 43 is provided between the two smoke-guiding plates, each smoke-guiding plate being rotatably connected to a corresponding side of the bottom plate 43, respectively, and a rotation axis of each smoke-guiding plate extending in a front-rear direction. In this embodiment, the smoke guide plates and the bottom plate 43 are rotatably connected by hinges 44, respectively.

The first smoke-guiding plate 41 comprises a first smoke-guiding plate body 411 and a first enclosing plate 412 which is enclosed at the peripheral edge of the first smoke-guiding plate body 411, the second smoke-guiding plate 42 comprises a second smoke-guiding plate body 421 and a second enclosing plate 422 which is enclosed at the peripheral edge of the second smoke-guiding plate body 421, and each smoke-guiding plate body and each enclosing plate are all in a flat plate shape. The first coaming 412 has at least three edges surrounding the front and rear sides and the left side of the first smoke-guiding plate body 411 respectively, so that the first smoke-guiding plate 41 is a hollow cover body, and the second coaming 422 has at least three edges surrounding the front and rear sides and the right side of the second smoke-guiding plate body 421 respectively, so that the second smoke-guiding plate 42 is a hollow cover body. The first smoke guide 41 and the second smoke guide 42 are preferably each of unitary construction.

The first smoke-guiding plate 41 and the second smoke-guiding plate 42 can be in at least two states, the first state is a closed state and the second state is an open state. In the closed state, the first smoke guide plate 41 and the second smoke guide plate 42 are in a state of being unfolded at a maximum angle relative to the bottom plate 43, the first smoke guide plate 41 closes the first air inlet 11, the first smoke guide plate body 411 can be flush with the bottom of the first air inlet 11 to be closed, and the first coaming 412 extends into the smoke collecting hood 1 and the fan frame 2, so that the first smoke guide plate 41 is opened towards one side in the fan frame 2; the second smoke guide plate 42 closes the second air inlet 12, the second smoke guide plate body 421 is flush with the bottom of the second air inlet 12 to be closed, and the second coaming 422 extends into the smoke collecting hood 1 and the fan frame 2, so that the second smoke guide plate 42 is opened at one side facing into the fan frame 2. The closed state can prevent peculiar smell from being transmitted into a kitchen, and the preferred smoke guide plates can be clamped with the smoke collecting hood 1 in a clamping mode by adopting a common clamping connection mode and the like, and the clamping structure is not shown in the figure. The first ends of the first smoke-guiding plate 41 and the second smoke-guiding plate 42 are respectively first ends, the ends of the first smoke-guiding plate and the second smoke-guiding plate are respectively second ends, and the first ends of the smoke-guiding plates are respectively connected with the bottom plate 43 in a rotating way.

The upper surface of the bottom plate 43 is provided with an ultraviolet sterilization device 5, so that in the closed state, the ultraviolet sterilization device 5 is at least partially positioned in the fan frame 2 (mainly ensuring that an ultraviolet lamp 51 described below is positioned in the fan frame 2), can sterilize the fan frame 2 in the closed state of the air inlet, and can also avoid damage to users caused by ultraviolet rays. Of course, the ultraviolet sterilization device 5 may also work within the fume collection hood 1. The position of the ultraviolet sterilizing device 5 corresponds to the lower part of the bottom of the fan 3. The first air inlet 11 and the second air inlet 12 are in a communicated state, so that the ultraviolet sterilization device 5 enters the fan frame 2 through the fume collecting hood 1.

The range hood further comprises a motion mechanism for driving the first smoke guide plate 41, the second smoke guide plate 42 and the ultraviolet sterilization device 5, wherein the motion mechanism comprises a first driving mechanism 61, a second driving mechanism 62 and a clutch device 63, the first driving mechanism 61 is a linear driving module, any linear driving module existing in the field can be adopted, preferably an electric push rod is arranged on the fan frame 2 through the second driving mechanism 62, the second driving mechanism 62 is a rotary driving module and is used for driving the electric push rod (especially the output end of the electric push rod) to rotate along an axis extending forwards and backwards, and the second driving mechanism 62 is preferably a motor. The output end of the first driving mechanism 61 is in transmission connection with the bottom plate 43, so that the bottom plate 43 can be driven to lift.

The movement mechanism further comprises a guide mechanism for restraining the second ends of the two smoke guide plates in the smoke guide cover 1 in a manner that the second ends of the two smoke guide plates can move relative to the smoke guide cover 1, the guide mechanism comprises a first slide rail 641 and a second slide rail 642 which are arranged on the inner side of the smoke guide cover 1, each slide rail extends along the left-right direction and can be provided with two front-rear arranged smoke guide plates, a first slide block 643 is arranged on the first smoke guide plate 41, a second slide block 644 is arranged on the second smoke guide plate 42, the first slide block 643 is in sliding fit with the first slide rail 641, the end part, far away from the second smoke guide plate 42, of the first smoke guide plate 41 is arranged in the closed state, the second slide block 644 is in sliding fit with the second slide rail 642, and the end part, far away from the first smoke guide plate 42, of the second smoke guide plate 42 is arranged in the closed state. By means of the cooperation of the respective slide blocks and the respective slide rails, the movement path of the respective smoke guide plate can be defined when the base plate 43 is lifted.

Alternatively, instead of the base plate 43 (mainly for the sake of facilitating the arrangement of the ultraviolet sterilization device 5 and the driving of the two smoke guide plates), a hinge or the like may be used instead of the base plate 43, or two first driving mechanisms 61 may be provided, each of which is drivingly connected to the first end of one of the smoke guide plates.

Referring to fig. 4 and 5, when the push rod of the first driving mechanism 61 is extended to drive the bottom plate 43 to descend, the first and second smoke guide plates 41 and 42 are rotated in opposite directions, and when the bottom plate 43 is driven to a certain position, the first and second smoke guide plates 41 and 42 are folded to form a closed space in which the ultraviolet sterilizing device 5 is closed, thereby preventing contamination by oil smoke even if the first and second air inlets 11 and 12 are in an opened state (cooking state).

Referring to fig. 6, the arrow shows the rising path of the oil smoke, in the double-range cooking state, the two smoke guide plates are folded and at least partially positioned below the smoke collecting hood 1, preferably positioned at the middle position of the two air inlets, and positioned in the path of the rising of the oil smoke, at this time, the oil smoke can meet each smoke guide plate in advance in the rising process, under the effect of the wall attaching effect of each smoke guide plate, the oil smoke deflects towards the middle, and then the oil smoke deflected towards the middle enters the negative pressure area of each air inlet, so that escape is reduced, and the smoking effect is improved.

Referring to fig. 7, the arrow shows the path of rising of the oil smoke, when the amount of cooking oil smoke on the left side is smaller than that on the right side, for example, when the left side is steamed and the right side is fried, the second driving mechanism 62 drives the first driving mechanism 61 to deflect leftwards, meanwhile, the push rod of the first driving mechanism 61 stretches again, so that the two smoke guide plates deflect leftwards as a whole, at this time, the left negative pressure area is reduced, the right negative pressure area is increased, and the right smoking effect is improved.

Because the blower frame 2 is divided into a left air channel and a right air channel by the blower 3, and the ultraviolet sterilizing device 5 is positioned below the blower 3, if the position of the ultraviolet sterilizing device 5 is fixed, the two air channels cannot be sterilized. Therefore, in order to facilitate sterilization and disinfection of both air channels, referring to fig. 8, the moving mechanism includes the above-described clutch device 63, and the clutch device 63 includes a clutch upper portion 631, a clutch lower portion 632, and a moving portion 633. The ultraviolet sterilizing device 5 includes an ultraviolet lamp 51, a leg 52 and a base 53, the ultraviolet lamp 51 extends forward and backward, the leg 52 and the base 53 are respectively provided with two, and both the forward and backward sides of the ultraviolet lamp 51 are respectively connected with the base 53 through the leg 52. The base plates 53 are fixed to the bottom plate 43 at intervals from front to back, the output end of the first driving mechanism 61, the clutch 63 is provided adjacent to one of the base plates 53, and as in the present embodiment, the rear leg 52 is rotatably connected to the base plate 53 adjacent to the front base plate 53, the front leg 52 is rotatably connected to the base plate 53 via a rotation shaft 54, the rotation shaft 54 extends through the leg 52 and the base plate 53 in the front-rear direction, and the rotation shaft 54 is fixed to the leg 52 so as to be rotatable relative to the base plate 53.

The clutch upper portion 631 is fixed to the rotation shaft 54 to be capable of moving synchronously, the clutch lower portion 632 is fixed to the bottom plate 63, a first sliding groove 6311 is formed in the clutch upper portion 631, a second sliding groove 6321 is formed in the second clutch lower portion 632, the two sliding grooves extend up and down and are corresponding in position, the first sliding groove 6311 penetrates through the bottom of the clutch upper portion 631, and the second sliding groove 6321 penetrates through the top of the clutch lower portion 632. The output end of the first driving mechanism 61 is connected to the release upper portion 631 via a moving portion 53, and the moving portion 53 is slidable along the first slide groove 6311 and the second slide groove 6321. The clutch upper portion 631 and the clutch lower portion 632 are rotatably connected, and the rotation shaft extends back and forth, and as shown in the present embodiment, the rotational connection can be achieved by the rotation shaft 54 penetrating the clutch lower portion 632 and the clutch upper portion 631, wherein the rotation shaft 54 can rotate around its own axis with respect to the clutch lower portion 632, and the rotation shaft 54 is fixed to the clutch upper portion 631. Whereby the center of rotation of the leg 52 coincides with the center of rotation of the clutch upper 631. When the clutch upper 631 rotates, the rotation shaft 54 rotates simultaneously, so that the ultraviolet lamp 51 is rotated together by the leg 52.

Referring to fig. 9, when the moving part 633 is located in the separating upper part 631, the first driving mechanism 61 is in a contracted state, in which the ultraviolet sterilizing device 5 and each of the smoke guide plates are in a "separated" state, and if the second driving mechanism 62 is activated, only the ultraviolet lamp 51 is driven to rotate, and each of the smoke guide plates does not move. Referring to fig. 11, the second driving mechanism 62 drives the first driving mechanism 61 to deflect leftward, and at the same time, the push rod of the first driving mechanism 61 is extended, so that the ultraviolet lamp 51 can deflect leftward under the action of the first driving mechanism 61 (acting from the upper portion 631 through the moving portion 633), and the air duct on the left side of the blower 3 can be sterilized and disinfected in the moving direction indicated by the arrow. Otherwise, the air duct on the right side of the fan 3 can be sterilized. In the above process, the moving portion 633 is held in the clutch upper portion 631.

In the closed state, the moving part 633 is located in the upper part 631, after the first driving mechanism 61 is started, the push rod thereof is gradually extended, the moving part 633 moves into the clutch lower part 632, see fig. 10, the first driving mechanism 61 is in an extended state, in which the ultraviolet sterilizing device 5 and each smoke guide plate are in a "closed" state, after which the first driving mechanism 61 continues to extend, the bottom plate 43 can be pushed to the lowest position, so that each air inlet is opened, after which the first driving mechanism 61 continues to extend and the second driving mechanism 62 rotates, and both the ultraviolet sterilizing device 5 and each smoke guide plate are driven to synchronously move.

Claims (13)

1. The range hood comprises a fume collecting hood (1), a fan frame (2) arranged on the fume collecting hood (1) and a fan (3) arranged in the fan frame (2), wherein a first air inlet (11) and a second air inlet (12) which are arranged left and right are formed in the fume collecting hood (1);

the range hood further comprises a first smoke guide plate (41) and a second smoke guide plate (42); the method is characterized in that:

the first smoke-guiding plate (41) and the second smoke-guiding plate (42) can be at least in the following two states:

the first smoke guide plate (41) closes the first air inlet (11), the second smoke guide plate (42) closes the second air inlet (12), and the end parts of the two smoke guide plates, which are close to each other, are respectively first end parts, and the end parts of the two smoke guide plates, which are far away from each other, are respectively second end parts;

in an open state, the first smoke guide plate (41) and the second smoke guide plate (42) are closed 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 respectively positioned at least partially below the smoke collecting hood (1).

2. The range hood of claim 1, wherein: the second ends of the first smoke guide plate (41) and the second smoke guide plate (42) can move relative to the smoke collecting hood (1) and are restrained in the smoke collecting hood (1);

the range hood further comprises a movement mechanism, the movement mechanism comprises a first driving mechanism (61), and the first driving mechanism (61) enables the first end parts of the first smoke guide plate (41) and the second smoke guide plate (42) to move below the smoke collecting hood (1) when the first smoke guide plate (41) and the second smoke guide plate (42) are in a closed state to an open state.

3. The range hood of claim 2, wherein: the movement mechanism further comprises a guide mechanism for restraining the second end parts of the first smoke guide plate (41) and the second smoke guide plate (42), the guide mechanism comprises a first sliding rail (641) and a second sliding rail (642) which are arranged on the inner side of the smoke collecting hood (1), each sliding rail extends along the left-right direction, a first sliding block (643) is arranged on the first smoke guide plate (41), a second sliding block (644) is arranged on the second smoke guide plate (42), the first sliding block (643) is in sliding fit with the first sliding rail (641) and is arranged at the first end part of the first smoke guide plate (41), and the second sliding block (644) is in sliding fit with the second sliding rail (642) and is arranged at the first end part of the second smoke guide plate (42).

4. The range hood of claim 2, wherein: a bottom plate (43) is arranged between the two smoke guide plates, the first end of each smoke guide plate is respectively and rotatably connected with the corresponding side of the bottom plate (43), and the rotation axis of each smoke guide plate extends in the front-rear direction; the first driving mechanism (61) is in transmission connection with the bottom plate (43) and can drive the bottom plate (43) to lift.

5. The range hood of claim 4, wherein: the movement mechanism further comprises a second driving mechanism (62), and the second driving mechanism (62) can drive the output end of the first driving mechanism (61) to rotate along an axis extending forwards and backwards at least.

6. The range hood of claim 4, wherein: an ultraviolet sterilization device (5) is arranged on the upper surface of the bottom plate (43).

7. The range hood of claim 6, wherein: the first smoke guide plate (41) comprises a first smoke guide plate body (411) and a first coaming (412) which is arranged around the peripheral edge of the first smoke guide plate body (411), and the second smoke guide plate (42) comprises a second smoke guide plate body (421) and a second coaming (422) which is arranged around the peripheral edge of the second smoke guide plate body (421);

in a closed state, the first smoke guide plate body (411) closes the first air inlet (11), the first coaming plate (412) extends into the smoke collecting hood (1), the second smoke guide plate body (421) closes the second air inlet (12), and the second coaming plate (422) extends into the smoke collecting hood (1);

in the open state, the first smoke guide plate (41) and the second smoke guide plate (42) are folded to form an enclosed space, and the ultraviolet sterilization device (5) is positioned in the enclosed space.

8. The range hood of claim 6, wherein: in the closed state, the ultraviolet sterilization device (5) can rotate relative to the bottom plate (43).

9. The range hood of claim 8, wherein: the fan (3) is a centrifugal fan with an axis extending in the left-right direction, the interior of the fan frame (2) is divided into left and right air channels by the fan (3), and the rotation axis of the ultraviolet sterilization device (5) extends in the front-back direction.

10. The range hood of claim 9, wherein: the motion mechanism further comprises a second driving mechanism (62) and a clutch device (63), wherein the second driving mechanism (62) can at least drive the output end of the first driving mechanism (61) to rotate along an axis extending forwards and backwards;

the clutch device (63) comprises a clutch upper part (631), a clutch lower part (632) and a moving part (633), wherein the clutch lower part (632) is fixed on the bottom plate (43), the clutch upper part (631) is rotationally connected with the clutch lower part (632), and the moving part (633) is fixed with the output end of the first driving mechanism (61) and can slide in the clutch upper part (631) and the clutch lower part (632);

the ultraviolet sterilization device (5) comprises an ultraviolet lamp (51), and the ultraviolet lamp (51) moves synchronously with the clutch upper part (631).

11. The range hood of claim 10, wherein: the ultraviolet sterilization device (5) further comprises supporting legs (52) and a base (53), the ultraviolet lamp (51) is connected with the base (53) through the supporting legs (52), the base (53) is fixed on the bottom plate (43), and the supporting legs (52) and the base (53) are connected in a rotating mode through a rotating shaft (54).

12. The range hood of claim 11, wherein: the rotary shaft (54) also passes through a clutch upper part (631) and a clutch lower part (632), and the rotary shaft (54) is respectively fixed with the support leg (52) and the clutch upper part (631).

13. The range hood of claim 10, wherein: the clutch upper portion (631) is provided with a first sliding groove (6311), the clutch lower portion (632) is provided with a second sliding groove (6321), the two sliding grooves extend up and down and correspond in position, the first sliding groove (6311) penetrates through the bottom of the clutch upper portion (631), the second sliding groove (6321) penetrates through the top of the clutch lower portion (632), and the moving portion (633) slides along the first sliding groove (6311) and the second sliding groove (6321).