A range hood and its control method

Abstract

The present invention relates to the technical field of kitchen appliances, and particularly relates to a range hood and a control method thereof. The range hood includes: a smoke collecting hood; a main oil screen, at least part of which is hollowed out to form a smoke passage, and the main oil screen is movably connected to the smoke collecting hood; and a smoke guiding plate, configured as a plate-like structure, and the smoke guiding plate is movably connected to the main oil screen; when the main oil screen is in the initial state, it is arranged in a fitting manner with the top surface of the smoke collecting hood; when the main oil screen is in the working state, it is arranged at an angle with the top surface of the smoke collecting hood; when the smoke guiding plate is in the initial state, it covers the main oil screen; when the smoke guiding plate is in the working state, it is arranged at an angle with the main oil screen. For the range hood provided by the present invention, when the main oil screen is in the working state, it is arranged at an angle with the top surface of the smoke collecting hood, so that the oil fume filtering effect can be increased compared with the case where it is arranged parallel to the top surface of the smoke collecting hood, and the main oil screen is configured to be in an inclined state, which can accelerate the sliding speed of the grease on the main oil screen.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, and particularly relates to a range hood and a control method thereof. Background Art

[0002] Range hoods have become one of the indispensable kitchen appliances in modern families. Common range hoods include top-suction type and side-suction type. Top-suction range hoods are widely used due to their advantages such as neatness, light weight, and small space occupation. However, compared with side-suction range hoods, since the air inlet of top-suction range hoods is far from the cooking stove, the oil fume needs to travel a relatively long distance to reach the fan, and the time taken to reach the fan is relatively longer. As a result, some oil fume is likely to escape during operation. In addition, the oil mesh of conventional top-suction range hoods has a poor oil fume filtering effect and a low oil separation rate. A certain proportion of oil is inhaled into the fan and solidifies on the fan. After long-term use, the noise of the range hood increases and the cleaning difficulty becomes greater. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect of low oil separation rate of oil fume in existing range hoods, so as to provide a range hood that can improve the oil separation rate.

[0004] To solve the above technical problem, a range hood provided by the present invention includes:

[0005] A smoke collecting hood;

[0006] A main oil mesh, at least part of which is hollowed out to form a smoke passage, and the main oil mesh is movably connected to the smoke collecting hood; and

[0007] A smoke guiding plate, configured as a plate-like structure, and the smoke guiding plate is movably connected to the main oil mesh;

[0008] In the initial state, the main oil mesh is attached to the top surface of the smoke collecting hood; in the working state, the main oil mesh is arranged at an angle to the top surface of the smoke collecting hood;

[0009] In the initial state, the smoke guiding plate covers the main oil mesh; in the working state, the smoke guiding plate is arranged at an angle to the main oil mesh.

[0010] Optionally, the first end of the main oil mesh is rotatably connected to the smoke collecting hood; the first end of the smoke guiding plate is rotatably connected to the second end of the main oil mesh.

[0011] Optionally, in the working state, the included angle between the main oil mesh and the top surface of the smoke collecting hood is a, where a > 0°.

[0012] Optionally, in the working state, the included angle between the smoke guiding plate and the vertical direction is b, where b > 0°.

[0013] Optionally, the included angle a is equal to the included angle b.

[0014] Optionally, the smoke guide plate is a glass plate or a metal plate.

[0015] Optionally, it further includes:

[0016] A secondary oil screen, at least part of which is hollowed out to form a smoke passage; the secondary oil screen is movably connected to the smoke guide plate;

[0017] When the secondary oil screen is in the initial state, it is arranged in contact with the smoke guide plate; when the secondary oil screen is in the working state, it is arranged at an angle with the smoke guide plate.

[0018] Optionally, the first end of the secondary oil screen is rotatably connected to the second end of the smoke guide plate.

[0019] Optionally, the included angle between the secondary oil screen and the horizontal plane is c, where c > 10°.

[0020] Optionally, it further includes: an oil collection unit, adapted to collect oil; the oil collection unit is directly or indirectly connected to the secondary oil screen and is arranged at a position relatively below the second end of the secondary oil screen.

[0021] Optionally, it further includes:

[0022] A range hood body;

[0023] A lifting rod, one end of which is connected to the range hood body and the other end is connected to the secondary oil screen or the oil collection unit; the lifting rod is adapted to drive the oil collection unit to lift and drive at least one of the main oil screen, the smoke guide plate, and the secondary oil screen to switch between the initial state and the working state.

[0024] Optionally, it further includes:

[0025] At least one connecting rod, which is adapted to connect at least two of the range hood body, the main oil screen, the smoke guide plate, and the secondary oil screen.

[0026] The control method of the range hood provided by the present invention includes:

[0027] Obtain the oil fume concentration;

[0028] Based on the oil fume concentration, control the position state of at least one of the main oil screen, the smoke guide plate, and the secondary oil screen.

[0029] The technical solution of the present invention has the following advantages:

[0030] 1. The range hood provided by the present invention, when the main oil net is in the working state, is arranged at an angle with the top surface of the smoke collecting hood, so that the oil fume filtering effect can be increased compared with the arrangement parallel to the top surface of the smoke collecting hood, and the main oil net is constructed in an inclined state to accelerate the sliding speed of the grease on the main oil net.

[0031] 2. The range hood provided by the present invention, when the smoke guiding plate is in the initial state, covers the main oil net, and when in the working state, is arranged at an angle with the main oil net, so as to improve the aesthetic degree in the initial state, cover the oil net when not in use, avoid the oil net being exposed to the air for a long time, reduce the possibility of oil net dust accumulation, and reduce the cleaning difficulty after the dust is mixed with the grease; at the same time, when in the working state, moving the smoke guiding plate can improve the guiding and filtering effect of the flue gas, reduce the escape rate of the oil fume, increase the contact area between the oil fume and the smoke guiding plate, virtually increase the condensation area of the flue gas, and improve the grease separation degree; through the movable setting of the smoke guiding plate, the combination of improving the aesthetic degree and increasing the practicality is well achieved.

[0032] 3. The range hood provided by the present invention, the smoke guiding plate is arranged at an angle with the vertical direction, which can make the second end of the smoke guiding plate have a certain distance from the wall, can contact the rising oil fume faster, increase the contact area between the oil fume and the smoke guiding plate, and increase the contact duration between the oil fume and the smoke guiding plate, so as to achieve a better condensation effect, improve the grease separation degree, and enhance the oil fume filtering effect.

[0033] 4. The range hood provided by the present invention, is movably connected with the smoke guiding plate and is arranged at an angle with the smoke guiding plate when in the working state, so that the secondary oil net can filter the oil fume escaping to the rear of the smoke guiding plate. On the one hand, it can avoid the situation that the grease in the oil fume directly floats upward along the wall without obstruction and easily adheres to the wall; on the other hand, it can avoid the situation that the oil fume escaping to the rear of the smoke guiding plate directly enters the smoke collecting cavity without passing through the first layer of oil net, and improve the grease separation degree.

[0034] 5. The range hood provided by the present invention, the secondary oil net is arranged in an inclined form, which can accelerate the sliding speed of the grease on the main oil net. In addition, through experiments, regardless of the setting angle of the smoke guiding plate, when the angle c between the secondary oil net and the horizontal plane is greater than 10°, the oil droplets sliding off the smoke guiding plate will not directly drip vertically to the ground, but further slide down to the oil cup via the secondary oil net, avoiding the situation of random dripping of grease. Description of the Drawings

[0035] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0036] Figure 1 It is a schematic cross-sectional view of the working state of the range hood of the present invention;

[0037] Figure 2 It is a front view of the working state of the range hood of the present invention;

[0038] Figure 3 It is a three-dimensional schematic of the working state of the range hood of the present invention Figure 1 ;

[0039] Figure 4 It is a three-dimensional schematic of the working state of the range hood of the present invention Figure 2 ;

[0040] Figure 5 It is a schematic cross-sectional view of the initial state of the range hood of the present invention;

[0041] Figure 6 It is a three-dimensional of the initial state of the range hood of the present invention Figure 1 ;

[0042] Figure 7 It is a three-dimensional of the initial state of the range hood of the present invention Figure 2 。

[0043] Explanation of reference numerals:

[0044] 1 - Main oil net, 2 - Smoke guide plate, 3 - Sub - oil net, 4 - Oil collection unit, 5 - Smoke collection hood, 6 - Driven lifting rod, 7 - Driving lifting rod, 8 - First connecting rod, 81 - First slider, 9 - Second connecting rod, 91 - Second slider, 10 - Third connecting rod, 101 - Third slider, 11 - Smoke sensor module. Specific embodiments

[0045] The following will clearly and completely describe the technical solutions of the present invention with reference to the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0046] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0047] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0049] Embodiment 1

[0050] Combined with Figures 1-7 As shown, the range hood provided in this embodiment includes:

[0051] A smoke collecting hood 5;

[0052] A main oil net 1, at least part of which is hollowed out to form a smoke passage, and the main oil net 1 is movably connected to the smoke collecting hood 5; and

[0053] A smoke guiding plate 2, configured as a plate-like structure, and the smoke guiding plate 2 is movably connected to the main oil net 1;

[0054] When the main oil net 1 is in the initial state, it is attached to the top surface of the smoke collecting hood 5; when the main oil net 1 is in the working state, it is arranged at an angle with the top surface of the smoke collecting hood 5;

[0055] When the smoke guiding plate 2 is in the initial state, it covers the main oil net 1; when the smoke guiding plate 2 is in the working state, it is arranged at an angle with the main oil net 1.

[0056] Preferably, a plurality of grilles are penetrated through the main oil net 1 or the main oil net 1 is arranged in a mesh form to form a smoke passage, so as to play a role in filtering the oil fume.

[0057] As a variation, the main oil screen 1 can also be fixedly connected to the smoke collecting hood 5.

[0058] Preferably, the top surface of the smoke collecting hood 5 is arranged parallel to the horizontal plane.

[0059] In the range hood provided in this embodiment, when the main oil screen 1 is in the working state, it is arranged at an angle with the top surface of the smoke collecting hood 5, so that the oil fume filtering effect can be increased compared with the arrangement parallel to the top surface of the smoke collecting hood 5, and the inclined state of the main oil screen 1 can accelerate the sliding speed of the grease on the main oil screen 1.

[0060] In the range hood provided in this embodiment, in the initial state, the smoke guide plate 2 covers the main oil screen 1, and in the working state, it is arranged at an angle with the main oil screen 1, so as to improve the aesthetic degree in the initial state, cover the oil screen when not in use, avoid the long-term exposure of the oil screen to the air, reduce the possibility of oil screen dust accumulation, and reduce the cleaning difficulty after the dust is mixed with the grease; at the same time, in the working state, moving the smoke guide plate 2 can improve the guiding and filtering effect of the flue gas, reduce the escape rate of the oil fume, increase the contact area between the oil fume and the smoke guide plate 2, virtually increase the condensation area of the flue gas, and improve the grease separation degree; through the movable setting of the smoke guide plate, the combination of improving the aesthetic degree and increasing the practicality is well achieved.

[0061] Adopting the form of the range hood provided in this embodiment greatly increases the contact probability between the oil fume and the oil screen and the smoke guide plate, and a considerable part of the grease in the oil fume can be separated before the oil fume enters the smoke collecting hood, improving the filtering effect of the flue gas. In addition, by extending the smoke guide plate downward, the smoke guiding effect can be improved and the probability of oil fume escape can be reduced.

[0062] As an optional implementation form, the specific connection between the main oil screen 1 and the smoke collecting hood 5 can be: the main oil screen 1 is slidably connected to the smoke collecting hood 5; or at least one end of the main oil screen 1 is rotatably connected to the smoke collecting hood 5; or the main oil screen 1 has no direct connection with the smoke collecting hood 5, but the main oil screen 1 moves relative to the smoke collecting hood 5 through other connection structures. In the above implementation forms, when the main oil screen 1 is slidably connected to the smoke collecting hood 5, the main oil screen 1 can be configured as an arc surface structure or the sliding path of the main oil screen 1 is arc-shaped, so that the main oil screen 1 can slide relative to the smoke collecting hood 5 along a preset guide rail, and the main oil screen 1 is arranged at an angle with the top surface of the smoke collecting hood 5 in the working state.

[0063] As an alternative implementation form, the specific way that the smoke guide plate 2 is movably connected to the main oil mesh 1 can be: the smoke guide plate 2 is slidably connected to the main oil mesh 1; or the smoke guide plate 2 is rotatably connected to the main oil mesh 1; or the smoke guide plate 2 has no direct connection with the main oil mesh 1, but rather the movement of the smoke guide plate 2 relative to the main oil mesh 1 is achieved through other connection structures. In the above implementation forms, when the smoke guide plate 2 is slidably connected to the main oil mesh 1, at least one of the smoke guide plate 2 and the main oil mesh 1 is configured as a curved surface structure, or the smoke guide plate 2 is adapted to slide along a slide rail arranged at an angle to the main oil mesh 1, so that the smoke guide plate 2 is arranged at an angle relative to the main oil mesh 1 in the working state.

[0064] Specifically, the first end of the main oil mesh 1 is rotatably connected to the smoke collecting hood 5; the first end of the smoke guide plate 2 is rotatably connected to the second end of the main oil mesh 1.

[0065] As a preferred implementation form, the first end of the main oil mesh 1 is connected to the smoke collecting hood 5 in the form of a hinge or a bushing or a hinge, thereby restricting the rotation of the main oil mesh 1. The first end of the smoke guide plate 2 is connected to the second end of the main oil mesh 1 in the form of a hinge or a bushing or a hinge, thereby restricting the rotation of the smoke guide plate 2 relative to the main oil mesh 1.

[0066] Specifically, in combination with Figure 1 as shown, in the working state, the included angle between the main oil mesh 1 and the top surface of the smoke collecting hood 5 is a, where a > 0°.

[0067] Specifically, in combination with Figure 1 as shown, in the working state, the included angle between the smoke guide plate 2 and the vertical direction is b, where b > 0°.

[0068] Since the range hood is installed above the cooking appliance and is usually installed against the wall, and for the cooking appliance, the cooking utensils placed on the cooking appliance usually have a certain distance from the wall. At this time, when the oil fume generated by the cooking utensils in the cooking state rises naturally, there is also a certain distance from the wall. By arranging the smoke guide plate 2 at an angle to the vertical direction, and preferably, making the extension direction of the smoke guide plate 2 fit the edge of the cooking utensil close to the wall side, the smoke guide plate 2 can contact the rising oil fume faster, increase the contact area between the oil fume and the smoke guide plate 2, increase the contact duration between the oil fume and the smoke guide plate 2, thereby achieving a better condensation effect, improving the oil separation degree, and enhancing the oil fume filtering effect.

[0069] The range hood provided in this embodiment has a smoke guide plate 2 arranged at an angle to the vertical direction, which can keep a certain distance between the second end of the smoke guide plate 2 and the wall, enabling it to contact the rising oil fumes more quickly, increasing the contact area between the oil fumes and the smoke guide plate 2, prolonging the contact time between the oil fumes and the smoke guide plate 2, thus achieving a better condensation effect, improving the oil separation degree, and enhancing the effect of filtering oil fumes.

[0070] Specifically, the included angle a is equal to the included angle b.

[0071] In some preferred implementation forms, when the included angle a is equal to the included angle b, the smoke guide plate 2 is arranged at a right angle to the main oil mesh 1.

[0072] Preferably, through calculation and experiment, considering actual cooking use, when the included angle between the main oil mesh 1 and the top plate of the smoke collecting hood is 15°, and the included angle between the smoke guide plate 2 and the main oil mesh 1 is 90°, the range hood provided in this embodiment is in the best position during cooking when in the working state.

[0073] Specifically, the smoke guide plate 2 is made of a glass plate or a metal plate.

[0074] Preferably, in this embodiment, the smoke guide plate 2 is a large integral panel, which can guide a large amount of oil fumes into the smoke collecting hood. While guiding the oil fumes, due to the low temperature of the glass or metal material itself, when the newly generated oil fumes pass through the smoke guide plate 2, the grease in the fumes will be condensed, so that part of the grease is filtered while guiding the fumes, playing a role in separating the grease.

[0075] Preferably, in this embodiment, the smoke guide plate 2 is made of glass material.

[0076] Specifically, the range hood further includes:

[0077] A secondary oil mesh 3, at least part of which is hollowed out to form a smoke passage; the secondary oil mesh 3 is movably connected to the smoke guide plate 2;

[0078] When in the initial state, the secondary oil mesh 3 is arranged in a fitting manner with the smoke guide plate 2; when in the working state, the secondary oil mesh 3 is arranged at an angle to the smoke guide plate 2.

[0079] Preferably, since this embodiment mainly includes three plate-like structures: the main oil mesh 1, the smoke guide plate 2, and the secondary oil mesh 3, for the convenience of description, they can be collectively referred to as folding plates.

[0080] Combined with Figure 1 As shown, when in the working state, the secondary oil mesh 3 is arranged at an angle to the smoke guide plate 2 and is adapted to cover the space between the smoke guide plate 2 and the wall, preventing the grease in the oil fumes from directly floating upward along the wall without obstruction.

[0081] Preferably, in this embodiment, by installing a three - layer folding plate on the range hood to replace the traditional fixed single - layer oil screen, the three - layer folding plate, from top to bottom, the first layer is the main oil screen 1 with a large area that can cover the air inlet, the second layer is the whole smoke - guiding plate 2 made of glass, and the third layer is the small - area secondary oil screen 3. Preferably, the secondary oil screen 3 is about one - third of the main oil screen 1. In the initial state, the three - layer folding plate is folded under the smoke collecting hood 5 in a nearly parallel manner without interfering with each other.

[0082] The range hood provided in this embodiment is movably connected to the smoke - guiding plate 2 and is arranged at an angle with the smoke - guiding plate 2 in the working state, so that the secondary oil screen 3 can filter the oil fume that escapes to the rear of the smoke - guiding plate 2. On the one hand, it can avoid the situation that when the grease in the oil fume directly floats upward along the wall without obstruction, it is easy to attach the grease to the wall; on the other hand, it can avoid the situation that the oil fume that escapes to the rear of the smoke - guiding plate enters the smoke collecting cavity directly without passing through the first - layer oil screen, improving the grease separation degree.

[0083] Specifically, the first end of the secondary oil screen 3 is rotatably connected to the second end of the smoke - guiding plate 2.

[0084] Specifically, in combination with Figure 1 As shown, the angle between the secondary oil screen 3 and the horizontal plane is c, where c > 10°.

[0085] The range hood provided in this embodiment has the secondary oil screen 3 arranged in an inclined form, which can accelerate the sliding speed of the grease on the main oil screen 1. In addition, through experiments, regardless of the setting angle of the smoke - guiding plate 2, when the angle c between the secondary oil screen 3 and the horizontal plane is greater than 10°, the oil droplets sliding down from the smoke - guiding plate 2 will not directly drip vertically onto the ground, but further slide down to the oil cup through the secondary oil screen 3, avoiding the situation of random dripping of grease.

[0086] Preferably, in this embodiment, the design angle of the secondary oil screen 3 is preferably between 15° and 25°, and at this time, there is no risk of dripping of the oil droplets sliding down from the smoke - guiding plate 2.

[0087] Preferably, the angle between the secondary oil screen 3 and the smoke - guiding plate 2 is preferably 90°, and at this time, it is the best position without affecting the smoke - guiding performance and cooking.

[0088] Specifically, it further includes: an oil collecting unit 4 adapted to collect the oil liquid; the oil collecting unit 4 is directly or indirectly connected to the secondary oil screen 3 and is arranged at a position relatively below the second end of the secondary oil screen 3.

[0089] Preferably, the oil collecting unit 4 can be in the structural form of an oil cup, an oil trough, etc.

[0090] In this embodiment, both ends of the oil collecting unit 4 are hinged to the secondary oil screen 3, and the movement of the oil collecting unit 4 is not restricted, so as to ensure that when the secondary oil screen 3 moves, the oil collecting unit 4 can adjust its angle by gravity balance to avoid tilting.

[0091] As a specific working form, after starting work, the main oil screen 1, the smoke guide plate 2, and the secondary oil screen 3 are at different angles respectively. The main oil screen 1 and the secondary oil screen 3 can filter the oil fume twice before and after, and the smoke guide plate 2 in the middle guides and adsorbs the oil fume to avoid the escape of excess oil fume. By adopting this setting form, not only can the oil separation degree be improved, but also the smoke guiding effect can be enhanced to prevent the oil fume from escaping. In addition, when working, the three plates are all at a certain angle to the horizontal plane, which will make it easier for the oil filtered and adsorbed on each plate to slide down in turn and finally converge into the oil cup.

[0092] Specifically, the range hood further includes:

[0093] A range hood body;

[0094] A lifting rod, one end of which is connected to the range hood body and the other end is connected to the secondary oil screen 3 or the oil collecting unit 4; the lifting rod is adapted to drive the oil collecting unit 4 to lift, and drive at least one of the main oil screen 1, the smoke guide plate 2, and the secondary oil screen 3 to switch between the initial state and the working state.

[0095] Preferably, in this embodiment, the lifting rod includes a main lifting rod 7 and a driven lifting rod 6. As a further preference, the main lifting rod 7 and the driven lifting rod 6 can adopt the form of a hydraulic rod or a rod with dual functions of telescoping and rotating; one end of the driven lifting rod 6 is fixedly connected to the range hood body through a hinge, and one end of the main lifting rod 7 is connected to the range hood body through an electric rotating shaft. By the rotation of the electric rotating shaft, the rotation of the main lifting rod 7 is driven, and the driven lifting rod 6 follows the rotation. During the rotation process, the main lifting rod 7 performs a telescoping motion, and the driven lifting rod 6 follows to perform a telescoping motion.

[0096] Preferably, the driven lifting rod 6, as a driven part, is symmetrically distributed with the main lifting rod 7 on the other side of the folding plate, which not only plays a supporting and fixing role, but also eliminates the hidden danger of unstable center of gravity and excessive jitter during the movement of the folding plate.

[0097] Specifically, the range hood further includes:

[0098] At least one connecting rod, which is adapted to connect at least two of the range hood body, the main oil screen 1, the smoke guide plate 2, and the secondary oil screen 3.

[0099] Preferably, in this embodiment, the connecting rod includes: a first connecting rod 8, a second connecting rod 9, and a third connecting rod 10. Among them, the first connecting rod 8 is adapted to connect the range hood body and the main oil net 1, the second connecting rod 9 is adapted to connect the main oil net 1 and the smoke guide plate 2, and the third connecting rod 10 is adapted to connect the smoke guide plate 2 and the auxiliary oil net 3; By adopting a device similar to the three-bar linkage folding, each board can be constrained to a fixed angle after being opened. One end of the first connecting rod 8, the second connecting rod 9, and the third connecting rod 10 are respectively hinged with a first slider 81, a second slider 91, and a third slider 101.

[0100] Specifically, one end of the first connecting rod 8 is hinged to the first slider 81, and the first slider 81 is slidably connected to the range hood body and moves in a slide rail with a fixed distance. The other end of the first connecting rod 8 is fixed at the midpoint position of the side surface of the first side of the main oil net 1 in a hinge manner. By the same principle, to constrain the movement of the smoke guide plate 2, one end of the second connecting rod 9 is hinged to the second slider 91, and the second slider 91 is clamped to the slide rail on the side surface of the second side of the main oil net 1. The other end of the second connecting rod 9 is fixed at the midpoint position of the side surface of the second side of the smoke guide plate 2 in a hinge manner. By the same principle, to constrain the movement of the auxiliary oil net 3, one end of the third connecting rod 10 is hinged to the third slider 101, and the third slider 101 is clamped to the slide rail on the side surface of the first side of the smoke guide plate 2. The other end of the third connecting rod 10 is fixed at the midpoint position of the side surface of the first side of the auxiliary oil net 3 in a hinge manner.

[0101] As a variation, the movement control of the three folding plates can be actively controlled by three electric rotary telescopic push rods respectively. As three active components, by setting the rotation angle and telescopic distance of each electric rotary telescopic push rod, the angles and distances of each folding plate can be ensured.

[0102] When the range hood is in the standby or closed state, the three-layer folding plates are folded under the smoke collecting hood 5 in a nearly parallel manner without interfering with each other. When the range hood is started, the active lifting rod 7 rotates at a set speed and simultaneously extends at a set speed frequency, driving the auxiliary oil net 3 to move and rotate. At the same time, the main oil net 1 and the smoke guide plate 2 move synchronously. Since there is a third connecting rod 10 to constrain between the auxiliary oil net 3 and the smoke guide plate 2, the movement of the smoke guide plate presents a fixed movement curve. Similarly, the second connecting rod 9 between the main oil net 1 and the smoke guide plate will also constrain the movement of the main oil net 1 to present a fixed movement curve; due to the existence of the first connecting rod 8, the main oil net 1 will also be constrained.

[0103] Preferably, when the three connecting rods reach the maximum extended state, the three connecting rods are all in a vertical state, which limits the influence of manual operation on the angles of the three folding plates during use.

[0104] Preferably, the range hood further includes a smoke sensor module 11, which is adapted to detect the oil fume concentration. In this embodiment, the smoke sensor module 11 is installed at the middle position of the front panel of the smoke collecting hood.

[0105] Embodiment Two

[0106] This embodiment provides a control method for a range hood, including:

[0107] Obtaining the oil fume concentration;

[0108] Based on the oil fume concentration, controlling the position state of at least one of the main oil mesh, the smoke guiding plate, and the auxiliary oil mesh.

[0109] The controlling the position state of at least one of the main oil mesh, the smoke guiding plate, and the auxiliary oil mesh based on the oil fume concentration includes:

[0110] When the oil fume concentration is greater than a preset concentration, controlling at least one of the main oil mesh, the smoke guiding plate, and the auxiliary oil mesh to move from the initial state position to the working state position; and simultaneously controlling the blower to operate.

[0111] The oil fume concentration is obtained by the smoke sensor module 11.

[0112] As a variation, when the range hood is started or shut down, the movement of the folding plate will be started or shut down synchronously. In addition, the opening and closing of the folding plate can also be controlled separately to facilitate subsequent cleaning.

[0113] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. An oil fume suction machine, characterized in that, Comprising: A smoke collecting hood (5); A main oil net (1), at least part of which is hollowed out to form a smoke passage, and the main oil net (1) is movably connected to the smoke collecting hood (5); and A smoke guiding plate (2), configured as a plate-like structure, and the smoke guiding plate (2) is movably connected to the main oil net (1); When in the initial state, the main oil net (1) is arranged in a fitting manner with the top surface of the smoke collecting hood (5); when in the working state, the main oil net (1) is arranged at an angle with the top surface of the smoke collecting hood (5); When in the initial state, the smoke guiding plate (2) covers the main oil net (1); when in the working state, the smoke guiding plate (2) is arranged at an angle with the main oil net (1); The first end of the main oil net (1) is rotatably connected to the smoke collecting hood (5); the first end of the smoke guiding plate (2) is rotatably connected to the second end of the main oil net (1); In the working state, the included angle between the main oil net (1) and the top surface of the smoke collecting hood (5) is a, where a > 0°; in the working state, the included angle between the smoke guiding plate (2) and the vertical direction is b, where b > 0°; Further comprising: A secondary oil net (3), at least part of which is hollowed out to form a smoke passage; the secondary oil net (3) is movably connected to the smoke guiding plate (2); When in the initial state, the secondary oil net (3) is arranged in a fitting manner with the smoke guiding plate (2); when in the working state, the secondary oil net (3) is arranged at an angle with the smoke guiding plate (2); The main oil net (1), the smoke guiding plate (2), and the secondary oil net (3) form a form of folding plates, and the three-layer folding plates are arranged from top to bottom.

2. The range hood according to claim 1, characterized in that, The included angle a is equal to the included angle b.

3. The range hood according to claim 1, wherein The smoke guiding plate (2) is a glass plate or a metal plate.

4. The range hood according to claim 1, wherein, The first end of the secondary oil net (3) is rotatably connected to the second end of the smoke guiding plate (2).

5. The range hood according to claim 1, characterized in that, The included angle between the secondary oil net (3) and the horizontal plane is c, where c > 10°.

6. The range hood according to claim 1, wherein, Further comprising: An oil collecting unit (4), adapted to collect oil; the oil collecting unit (4) is directly or indirectly connected to the secondary oil net (3) and is arranged at a position relatively below the second end of the secondary oil net (3).

7. The range hood according to claim 1, characterized in that, Further comprising: An oil fume extractor body; A lifting rod, one end of which is connected to the oil fume extractor body, and the other end is connected to the secondary oil net (3) or the oil collecting unit (4); the lifting rod is adapted to drive the oil collecting unit (4) to lift, and drive at least one of the main oil net (1), the smoke guiding plate (2), and the secondary oil net (3) to switch between the initial state and the working state.

8. The range hood according to claim 7, wherein Further comprising: At least one connecting rod, which is adapted to connect at least two of the oil fume extractor body, the main oil net (1), the smoke guiding plate (2), and the secondary oil net (3).

9. A control method for a range hood, characterized in that, Applied to the oil fume extractor according to any one of claims 1 to 8 above, the method comprises: Obtaining the oil fume concentration; Controlling the position state of at least one of the main oil net, the smoke guiding plate, and the secondary oil net based on the oil fume concentration.

Images