Range hood and control method thereof

Abstract

The invention discloses a range hood and a control method thereof. The range hood comprises a smoke gathering plate, a rotating part, a shape memory alloy structure and a temperature adjusting structure. One end of the rotating part is connected with the smoke gathering plate; the shape memory alloy structure is connected with the other end of the rotating part; the control method comprises the steps that the current working state of the range hood is determined in real time; the current overturning angle of the smoke gathering plate is determined in real time; and according to the current working state of the range hood and the current overturning angle of the smoke gathering plate, the temperature of the shape memory alloy structure is adjusted, so that the shape memory alloy structure deforms, the rotating piece is driven to rotate, and the smoke gathering plate is driven to overturn. By means of the method, it is guaranteed that the current working state of the range hood is matched with the current overturning angle of the smoke gathering plate in real time, and the experience feeling of a user is improved.

Description

Technical Field

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

[0002] With the improvement of people's living standards, range hoods have become an indispensable part of the user's cooking process. When cooking in the kitchen, users must turn on the range hood to suck in the generated cooking fumes to ensure that the cooking fumes do not enter the human body.

[0003] The existing control methods for range hoods usually set different gears according to the working state of the range hood, and continuously work at this gear until the cooking is finished during the operation of the range hood. However, since the working state may change in real time during the cooking process, for example, the user manually switches the gear according to the actual cooking fume situation, or uses a smoke sensor to automatically identify the need for gear adjustment, etc. This results in the range hood continuously working at a lower gear and not being able to completely suck in the cooking fumes when there is too much cooking fume, causing cooking fume residue, or working at a higher gear when there is less cooking fume, wasting electric energy, increasing unnecessary energy consumption, and at the same time resulting in excessive noise and affecting the user experience. Summary of the Invention

[0004] The present invention provides a range hood and a control method thereof, which can ensure that the flipping angle of the smoke collecting plate and the working state of the range hood are matched in real time by determining in real time whether the flipping angle of the smoke collecting plate and the working state of the range hood are matched, and adjusting the flipping angle of the smoke collecting plate when they are not matched, saving electric energy, reducing noise, and improving the user experience.

[0005] According to one aspect of the present invention, a control method for a range hood is provided. The range hood includes a smoke collecting plate, a rotating member, a shape memory alloy structure, and a temperature adjusting structure; one end of the rotating member is connected to the smoke collecting plate, and the shape memory alloy structure is connected to the other end of the rotating member;

[0006] The control method includes:

[0007] Determine the current working state of the range hood in real time;

[0008] Determine the current flipping angle of the smoke collecting plate in real time;

[0009] According to the current working state of the range hood and the current flipping angle of the smoke collecting plate, adjust the temperature of the shape memory alloy structure so that the shape memory alloy structure deforms, drives the rotating member to rotate, and drives the smoke collecting plate to flip.

[0010] Optionally, according to the current working state of the range hood and the current flipping angle of the smoke collecting plate, adjust the temperature of the shape memory alloy structure so that the shape memory alloy structure deforms, drives the rotating member to rotate, and drives the smoke collecting plate to flip, including:

[0011] When the current flipping angle of the smoke collecting plate is less than the flipping angle of the smoke collecting plate corresponding to the current working state of the range hood, adjust the temperature of the shape memory alloy structure so that the shape memory alloy structure deforms, drives the rotating member to rotate, and drives the smoke collecting plate to increase the flipping angle;

[0012] When the current flipping angle of the smoke collecting plate is greater than the flipping angle of the smoke collecting plate corresponding to the current working state of the range hood, adjust the temperature of the shape memory alloy structure so that the shape memory alloy structure deforms, drives the rotating member to rotate, and drives the smoke collecting plate to decrease the flipping angle.

[0013] Optionally, a sleeve portion is provided on the rotating member, and the sleeve portion is sleeved on a fixed shaft;

[0014] The shape memory alloy structure includes a first telescopic portion and a second telescopic portion; both the first telescopic portion and the second telescopic portion are made of shape memory alloy. The first telescopic portion undergoes telescopic deformation along a first direction at different temperatures, and the second telescopic portion undergoes telescopic deformation along a second direction at different temperatures. The first direction and the second direction are both tangent to the sleeve portion;

[0015] One end of the first telescopic portion is fixed, and the other end is at least partially attached and fixed to the outer wall of the sleeve portion; one end of the second telescopic portion is fixed, and the other end is at least partially attached and fixed to the outer wall of the sleeve portion; the sleeve portion is located between the first telescopic portion and the second telescopic portion;

[0016] When the current flipping angle of the smoke collecting plate is less than the flipping angle of the smoke collecting plate corresponding to the current working state of the range hood, adjust the temperature of the shape memory alloy structure so that the shape memory alloy structure deforms, drives the rotating member to rotate, and drives the smoke collecting plate to increase the flipping angle, including:

[0017] When the current flipping angle of the smoke collecting plate is less than the flipping angle of the smoke collecting plate corresponding to the current working state of the range hood, increase the temperature value of the first telescopic portion so that the first telescopic portion contracts, drives the rotating member to rotate in a first rotation direction, and drives the smoke collecting plate to increase the flipping angle;

[0018] When the current flipping angle of the smoke collecting plate is greater than the flipping angle of the smoke collecting plate corresponding to the current working state of the range hood, adjust the temperature of the shape memory alloy structure so that the shape memory alloy structure deforms, drives the rotating member to rotate, and drives the smoke collecting plate to decrease the flipping angle, including:

[0019] When the current flipping angle of the smoke collecting plate is greater than the flipping angle of the smoke collecting plate corresponding to the current working state of the range hood, increase the temperature value of the second telescopic part so that the second telescopic part contracts, drive the rotating part to rotate in the second rotation direction, and drive the smoke collecting plate to reduce the flipping angle;

[0020] Wherein, the first rotation direction and the second rotation direction are opposite.

[0021] Optionally, the working states of the range hood include a shutdown state, a first working gear, a second working gear, and a third working gear;

[0022] In the shutdown state, the smoke collecting plate is at the initial flipping angle θ0;

[0023] In the first working gear, the smoke collecting plate is at the first flipping angle θ1; the first telescopic part is at the first length L1, and the corresponding control temperature is the first preset temperature value T1;

[0024] In the second working gear, the smoke collecting plate is at the second flipping angle θ2; the first telescopic part is at the second length L2, and the corresponding control temperature is the second preset temperature value T2;

[0025] In the third working gear, the smoke collecting plate is at the third flipping angle θ3; the first telescopic part is at the third length L3, and the corresponding control temperature is the third preset temperature value T3;

[0026] Wherein, L1 > L2 > L3; T1 < T2 < T3; θ0 < θ1 < θ2 < θ3;

[0027] When the current flipping angle of the smoke collecting plate is less than the flipping angle of the smoke collecting plate corresponding to the current working state of the range hood, increase the temperature value of the first telescopic part so that the first telescopic part contracts, drive the rotating part to rotate in the first rotation direction, and drive the smoke collecting plate to increase the flipping angle, including:

[0028] When the smoke collecting plate is at the initial flipping angle θ0 and the current working state of the range hood is the first working gear, adjust the first telescopic part to the first preset temperature value T1;

[0029] When the smoke collecting plate is at the first flipping angle θ1 and the current working state of the range hood is the second working gear, adjust the first telescopic part to the second preset temperature value T2;

[0030] When the smoke collecting plate is at the second flipping angle θ2 and the current working state of the range hood is the third working gear, adjust the first telescopic part to the third preset temperature value T3.

[0031] Optionally, the working states of the range hood include a shutdown state, a first working gear, a second working gear, and a third working gear;

[0032] In the shutdown state, the smoke collecting plate is at the initial flipping angle θ0; the second telescopic part is at the fourth length L4, and the corresponding controlled temperature is the fourth preset temperature value T4;

[0033] In the first working gear, the smoke collecting plate is at the first flipping angle θ1; the second telescopic part is at the fifth length L5, and the corresponding controlled temperature is the fifth preset temperature value T5;

[0034] In the second working gear, the smoke collecting plate is at the second flipping angle θ2; the second telescopic part is at the sixth length L6, and the corresponding controlled temperature is the sixth preset temperature value T6;

[0035] In the third working gear, the smoke collecting plate is at the third flipping angle θ3;

[0036] Wherein, L4 < L5 < L6; T4 > T5 > T6; θ0 < θ1 < θ2 < θ3;

[0037] When the current flipping angle of the smoke collecting plate is greater than the flipping angle of the smoke collecting plate corresponding to the current working state of the range hood, increase the temperature value of the second telescopic part so that the second telescopic part contracts, drive the rotating part to rotate in the second rotating direction, and drive the smoke collecting plate to reduce the flipping angle, including:

[0038] When the smoke collecting plate is at the third flipping angle θ3 and the current working state of the range hood is the second working gear, adjust the second telescopic part to the sixth preset temperature value T6;

[0039] When the smoke collecting plate is at the second flipping angle θ2 and the current working state of the range hood is the first working gear, adjust the second telescopic part to the fifth preset temperature value T5;

[0040] When the smoke collecting plate is at the first flipping angle θ1 and the current working state of the range hood is the shutdown state, adjust the second telescopic part to the fourth preset temperature value T4.

[0041] Optionally, it is characterized in that θ3 - θ2 = θ2 - θ1 = θ1 - θ0.

[0042] Optionally, before determining the current working state of the range hood in real time, it further includes:

[0043] Obtain the cooking mode selected by the user in real time;

[0044] According to the cooking mode selected by the user, adjust the current working state of the range hood in real time.

[0045] Optionally, before determining the current working state of the range hood in real time, it further includes:

[0046] Use the smoke sensor to detect the smoke concentration during the cooking process in real time;

[0047] Adjust the current working state of the range hood in real time according to the smoke concentration during the cooking process.

[0048] Optionally, the working states of the range hood include a first working gear, a second working gear, and a third working gear;

[0049] Adjusting the current working state of the range hood in real time according to the smoke concentration during the cooking process includes:

[0050] When the smoke concentration is in the first concentration range [0, c1), adjust the current working state of the range hood to the first working gear;

[0051] When the smoke concentration is in the second concentration range [c1, c2), adjust the current working state of the range hood to the second working gear;

[0052] When the smoke concentration is in the third concentration range [c2, +∞), adjust the current working state of the range hood to the third working gear;

[0053] Wherein, c1 < c2.

[0054] According to another aspect of the present invention, there is provided an oil fume machine, characterized in that it is used to execute the control method of the oil fume machine as described above; the oil fume machine includes:

[0055] A smoke collecting plate;

[0056] A rotating member, one end of which is connected to the smoke collecting plate;

[0057] A shape memory alloy structure, connected to the other end of the rotating member;

[0058] A temperature adjusting structure, disposed adjacent to the shape memory alloy structure, for adjusting the temperature of the shape memory alloy structure so that the shape memory alloy structure deforms, driving the rotating member to rotate, and driving the smoke collecting plate to flip.

[0059] The technical solution of the present invention determines the current working state of the range hood in real time; determines the current flipping angle of the smoke collecting plate in real time; adjusts the temperature of the shape memory alloy structure according to the current working state of the range hood and the current flipping angle of the smoke collecting plate, so that the shape memory alloy structure deforms, drives the rotating member to rotate, and drives the smoke collecting plate to flip. Using the above method, it is ensured that the current working state of the range hood and the current flipping angle of the smoke collecting plate are matched in real time during the cooking process, saving electric energy and improving the user experience.

[0060] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. Brief Description of the Drawings

[0061] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0062] Figure 1 It is a flowchart of a control method for a range hood provided in Embodiment 1 of the present invention;

[0063] Figure 2 It is a schematic structural diagram of a range hood when the smoke collecting plate is opened provided in Embodiment 1 of the present invention;

[0064] Figure 3 It is a partially enlarged schematic diagram of a range hood provided in Embodiment 1 of the present invention;

[0065] Figure 4 It is a flowchart of a control method for a range hood provided in Embodiment 2 of the present invention;

[0066] Figure 5 It is a flowchart of a control method for a range hood provided in Embodiment 3 of the present invention;

[0067] Figure 6 It is a flowchart of a control method for a range hood provided in Embodiment 4 of the present invention;

[0068] Wherein, 1 - smoke collecting plate, 2 - rotating member, 21 - sleeve part, 3 - shape memory alloy structure, 31 - first telescopic part, 32 - second telescopic part, 4 - temperature adjustment structure. Detailed implementation manners

[0069] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0070] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of the present invention are used to distinguish similar objects and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0071] Embodiment 1

[0072] Figure 1 It is a flowchart of a control method for an oil fume machine provided in Embodiment 1 of the present invention. Figure 2 It is a schematic structural diagram of an oil fume machine when the smoke collecting plate is opened, provided in Embodiment 1 of the present invention. Figure 3 It is a partial enlarged schematic diagram of an oil fume machine provided in Embodiment 1 of the present invention. This embodiment is applicable to the situation where the working state of the fume machine does not match the flipping angle of the smoke collecting plate. Among them, Figure 3 is Figure 2 a partial enlarged view of the dotted circle area shown, refer to Figure 2 and Figure 3As shown in the figure, the range hood includes a smoke collecting plate 1, a rotating member 2, a shape memory alloy structure 3, and a temperature regulating structure 4. One end of the rotating member 2 is connected to the smoke collecting plate 1, and the shape memory alloy structure 3 is connected to the other end of the rotating member 2. Among them, the smoke collecting plate 1 is an important component of the range hood, which is used to guide the oil fume to the negative pressure area in front of the smoke inlet, gather the oil fume, and reduce the escape of the oil fume. The rotating member 2 is a structural member that drives the smoke collecting plate 1 to flip. In this embodiment, the two ends of the rotating member 2 are respectively connected to the smoke collecting plate 1 and the shape memory alloy structure 3. The shape memory alloy structure 3 deforms to drive the rotating member 2 to rotate, thereby driving the smoke collecting plate 1 connected to the other end of the rotating member 2 to flip, so that the smoke collecting plate 1 flips to a preset angle, realizing the opening or closing of the smoke collecting plate 1. The shape memory alloy structure 3 refers to the microscopic and macroscopic structural characteristics of alloy materials with shape memory effects. Usually, the shape memory alloy structure 3 is sensitive to temperature. The shape memory effect and superelastic characteristics of the shape memory alloy structure 3 mainly rely on temperature changes to achieve deformation. That is to say, after the temperature of the shape memory alloy structure 3 is increased or decreased, the corresponding shape memory alloy structure 3 will deform, making the length of the shape memory alloy structure 3 shorter or longer. In addition, the material of the shape memory alloy structure 3 may include, but is not limited to, nickel-titanium alloys, iron-tin alloys, etc. The temperature regulating structure 4 is a structural member that can adjust the temperature of the shape memory alloy structure 3 through its own temperature change. As Figures 1 to 3 shown, the method includes:

[0073] S110. Determine the current working state of the range hood in real time.

[0074] S120. Determine the current flipping angle of the smoke collecting plate in real time.

[0075] Among them, the current working state of the range hood may include a first working state, a second working state, and a third working state. The power and rotation speed of the range hood corresponding to the first working gear, the second working gear, and the third working gear increase in sequence. The current flipping angle of the smoke collecting plate is the angle at which the smoke collecting plate opens during operation, and this angle directly affects the oil fume gathering effect and the smoking efficiency.

[0076] Specifically, the current working state of the range hood can be determined according to the smoke concentration of the fumes generated by the user during cooking or the gear selected by the user. After determination, the range hood will be controlled to work in this working state as the current working state. At the same time, after the current working state of the range hood is determined, it is necessary to determine the flipping angle of the smoke collecting plate corresponding to the current working state of the range hood according to the current working state of the range hood, and control the smoke collecting plate to flip to the corresponding flipping angle, then this flipping angle is the current flipping angle of the smoke collecting plate. However, during the cooking process, the working state of the range hood may change in real time. For example, the user adjusts the working gear by himself or the smoke concentration changes, which causes the current working state of the range hood to change, and the current flipping angle of the smoke collecting plate changes correspondingly. To determine whether the current working state of the range hood and the current flipping angle of the smoke collecting plate match in real time, that is, to determine whether the current flipping angle of the smoke collecting plate can correspond to the current working state of the range hood, the current working state of the range hood and the current flipping angle of the smoke collecting plate can be determined in real time.

[0077] S130. According to the current working state of the range hood and the current flipping angle of the smoke collecting plate, adjust the temperature of the shape memory alloy structure so that the shape memory alloy structure deforms, drives the rotating member to rotate, and drives the smoke collecting plate to flip.

[0078] Specifically, after the current working state of the range hood and the current flipping angle of the smoke collecting plate are determined in real time, it is necessary to determine whether there is a match between the current working state of the range hood and the current flipping angle of the smoke collecting plate. When there is a match between the current working state of the range hood and the current flipping angle of the smoke collecting plate, that is, the current flipping angle of the smoke collecting plate is the flipping angle of the smoke collecting plate corresponding to the current working state of the range hood, it indicates that the smoke collecting plate can completely absorb the cooking fumes at this time, and there is no need to adjust the flipping angle of the smoke collecting plate, and the smoke collecting plate continues to work at this current flipping angle. When it is determined that there is no match between the current working state of the range hood and the current flipping angle of the smoke collecting plate, that is, the current flipping angle of the smoke collecting plate is not the flipping angle of the smoke collecting plate corresponding to the current working state of the range hood. For example, the current flipping angle of the smoke collecting plate is less than the flipping angle of the smoke collecting plate corresponding to the current working state of the range hood, or the current flipping angle of the smoke collecting plate is greater than the flipping angle of the smoke collecting plate corresponding to the current working state of the range hood, it indicates that the smoke collecting plate has a weak or excessive ability to absorb the cooking fumes at this time. When it is weak, it will lead to a poor fume extraction effect and incomplete fume absorption, resulting in residual fumes. When it is excessive, it will lead to excessive energy consumption and unnecessary waste. Therefore, it is necessary to adjust the flipping angle of the smoke collecting plate. The temperature of the shape memory alloy structure can be adjusted according to the current working state of the range hood to the temperature corresponding to the current working state of the range hood. The shape memory alloy structure will deform under the action of temperature, causing a change in the length of the shape memory alloy structure. At the same time as the length of the shape memory alloy structure changes, it will drive the rotating member to rotate in a certain direction, such as counterclockwise or clockwise. During the rotation process, the smoke collecting plate connected to the rotating member will be driven to flip, so that the flipping angle of the smoke collecting plate reaches the flipping angle corresponding to the current working state of the range hood, and the smoke collecting plate works with this flipping angle as the current flipping angle. Among them, there is a preset corresponding relationship between the working state of the range hood and the flipping angle of the smoke collecting plate, which can be set in advance according to multiple experiments or experience, etc. Usually, the higher the target working gear, the larger the corresponding flipping angle of the smoke collecting plate.

[0079] The technical solution of the embodiment of the present invention determines the current working state of the range hood in real time; determines the current flipping angle of the smoke collecting plate in real time; adjusts the temperature of the shape memory alloy structure according to the current working state of the range hood and the current flipping angle of the smoke collecting plate, so that the shape memory alloy structure deforms, drives the rotating member to rotate, and drives the smoke collecting plate to flip. By using the above method, the real-time matching of the current working state of the range hood and the current flipping angle of the smoke collecting plate during the cooking process is ensured, the electric energy is saved, and the user experience is improved.

[0080] Embodiment 2

[0081] Figure 4The flowchart of a control method for a range hood provided in the second embodiment of the present invention. In this embodiment, the specific implementation manner of adjusting the temperature of the shape memory alloy structure in the above-mentioned embodiment S130, according to the current working state of the range hood and the current flipping angle of the smoke collecting plate, so that the shape memory alloy structure deforms, drives the rotating member to rotate, and drives the smoke collecting plate to flip is refined as follows:

[0082] When the current flipping angle of the smoke collecting plate is less than the flipping angle of the smoke collecting plate corresponding to the current working state of the range hood, adjust the temperature of the shape memory alloy structure so that the shape memory alloy structure deforms, drive the rotating member to rotate, and drive the smoke collecting plate to increase the flipping angle;

[0083] When the current flipping angle of the smoke collecting plate is greater than the flipping angle of the smoke collecting plate corresponding to the current working state of the range hood, adjust the temperature of the shape memory alloy structure so that the shape memory alloy structure deforms, drive the rotating member to rotate, and drive the smoke collecting plate to decrease the flipping angle.

[0084] For the content not detailed in this embodiment, reference can be made to the previous embodiment, which will not be elaborated here.

[0085] Reference Figures 2 to 4 As shown, the method includes:

[0086] S210. Determine the current working state of the range hood in real time.

[0087] S220. Determine the current flipping angle of the smoke collecting plate in real time.

[0088] S230. When the current flipping angle of the smoke collecting plate is less than the flipping angle of the smoke collecting plate corresponding to the current working state of the range hood, adjust the temperature of the shape memory alloy structure so that the shape memory alloy structure deforms, drive the rotating member to rotate, and drive the smoke collecting plate to increase the flipping angle.

[0089] Among them, this step can be refined as: S2301. When the current flipping angle of the smoke collecting plate is less than the flipping angle of the smoke collecting plate corresponding to the current working state of the range hood, increase the temperature value of the first telescopic part so that the first telescopic part contracts, drive the rotating member to rotate in the first rotation direction, and drive the smoke collecting plate to increase the flipping angle.

[0090] Among them, before explaining this step, first a simple description of the related structure is made. Reference Figure 2, a sleeve part 21 is provided on the rotating part 2, and the sleeve part 21 is sleeved around a fixed shaft; the shape memory alloy structure 3 includes a first telescopic part 31 and a second telescopic part 32; both the first telescopic part 31 and the second telescopic part 32 are made of shape memory alloy. The first telescopic part 31 undergoes telescopic deformation along a first direction at different temperatures, and the second telescopic part 32 undergoes telescopic deformation along a second direction at different temperatures. Both the first direction and the second direction are tangent to the sleeve part 21; one end of the first telescopic part 31 is fixed in position, and the other end is at least partially attached and fixed to the outer wall of the sleeve part 21; one end of the second telescopic part 32 is fixed in position, and the other end is at least partially attached and fixed to the outer wall of the sleeve part 21; the sleeve part 21 is located between the first telescopic part 31 and the second telescopic part 32. Among them, the sleeve part 21 is a cylindrical tubular part that can be sleeved around a fixed shaft and is used to fix one end of the rotating part 2. Both the first telescopic part 31 and the second telescopic part 32 are structures that can undergo telescopic deformation under the action of temperature.

[0091] Specifically, when it is determined that the current flipping angle of the smoke collecting plate is less than the flipping angle of the smoke collecting plate corresponding to the current working state of the range hood, that is to say, the smoke collecting plate has not reached the flipping angle of the smoke collecting plate corresponding to the current working state of the range hood, and the user is cooking with a lot of oil fume, such as frying, etc. At this time, when the smoke collecting plate works at the current flipping angle, it will cause oil fume residue and cannot be completely absorbed and discharged. Therefore, it is necessary to increase the flipping angle of the smoke collecting plate so that the smoke collecting plate absorbs the oil fume at a larger flipping angle and a higher power. That is, the temperature value of the first telescopic part can be increased to the temperature corresponding to the current working state of the range hood, so that the first telescopic part shrinks, the length becomes shorter, and the rotating part is driven to rotate along the first rotation direction, so that the rotating part rotates a larger angle under the action of the shrinking first telescopic part. When the rotating part rotates, it drives the flipping angle of the smoke collecting plate to increase, reaches the flipping angle corresponding to the current working state of the range hood, and works with the increased flipping angle as the current flipping angle. Among them, the first rotation direction is the counterclockwise direction.

[0092] S240. When the current flipping angle of the smoke collecting plate is greater than the flipping angle of the smoke collecting plate corresponding to the current working state of the range hood, adjust the temperature of the shape memory alloy structure so that the shape memory alloy structure deforms, drives the rotating part to rotate, and drives the smoke collecting plate to reduce the flipping angle.

[0093] Among them, this step can be refined as: S2401. When the current flipping angle of the smoke collecting plate is greater than the flipping angle of the smoke collecting plate corresponding to the current working state of the range hood, increase the temperature value of the second telescopic part so that the second telescopic part shrinks, drive the rotating part to rotate in the second rotation direction, and drive the smoke collecting plate to reduce the flipping angle.

[0094] Specifically, when it is determined that the current flipping angle of the smoke collecting plate is greater than the flipping angle of the smoke collecting plate corresponding to the current working state of the range hood, that is to say, the smoke collecting plate exceeds the flipping angle of the smoke collecting plate corresponding to the current working state of the range hood, the user is cooking with less fume generation, such as steaming. At this time, when the smoke collecting plate works at the current flipping angle, it will cause the working power of the range hood to be too high, consume unnecessary electrical energy, and bring greater noise. Therefore, it is necessary to reduce the flipping angle of the smoke collecting plate, so that the smoke collecting plate absorbs the fume at a smaller flipping angle and a smaller power, which can increase the temperature value of the second telescopic part to the temperature corresponding to the current working state of the range hood, so that the second telescopic part shrinks and its length becomes shorter, and drives the rotating part to rotate in the second rotation direction, so that the rotating part rotates a larger angle under the action of the shrinking second telescopic part. When the rotating part rotates and drives the smoke collecting plate to flip, the flipping angle is reduced to reach the flipping angle corresponding to the current working state of the range hood, and the reduced flipping angle is used as the current flipping angle to work. Among them, the first rotation direction and the second rotation direction are opposite. In this embodiment, the first rotation direction is the direction to increase the flipping angle of the smoke collecting plate, and the second rotation direction is the direction to decrease the flipping angle of the smoke collecting plate, that is, the first rotation direction is the counterclockwise direction, and the second rotation direction is the clockwise direction.

[0095] In the technical solution of the embodiment of the present invention, when the current flipping angle of the smoke collecting plate is less than the flipping angle of the smoke collecting plate corresponding to the current working state of the range hood, the temperature of the shape memory alloy structure is adjusted to cause the shape memory alloy structure to deform, drive the rotating part to rotate, and drive the smoke collecting plate to increase the flipping angle; when the current flipping angle of the smoke collecting plate is greater than the flipping angle of the smoke collecting plate corresponding to the current working state of the range hood, the temperature of the shape memory alloy structure is adjusted to cause the shape memory alloy structure to deform, drive the rotating part to rotate, and drive the smoke collecting plate to decrease the flipping angle. By using the above method, the matching between the current working state of the range hood and the current flipping angle of the smoke collecting plate is ensured, ensuring that the fume can be discharged normally, saving electrical energy, and improving the user experience.

[0096] In a specific embodiment, optionally, the working states of the range hood include a shutdown state, a first working gear, a second working gear, and a third working gear; in the shutdown state, the smoke collecting plate is at an initial flipping angle θ0; in the first working gear, the smoke collecting plate is at a first flipping angle θ1; the first telescopic part is at a first length L1, and the corresponding controlled temperature is a first preset temperature value T1; in the second working gear, the smoke collecting plate is at a second flipping angle θ2; the first telescopic part is at a second length L2, and the corresponding controlled temperature is a second preset temperature value T2; in the third working gear, the smoke collecting plate is at a third flipping angle θ3; the first telescopic part is at a third length L3, and the corresponding controlled temperature is a third preset temperature value T3; where L1 > L2 > L3; T1 < T2 < T3; θ0 < θ1 < θ2 < θ3. That is to say, the relationship between the length of the first telescopic part and the controlled temperature is negatively correlated. The higher the controlled temperature, the shorter the corresponding length of the first telescopic part; the lower the controlled temperature, the longer the corresponding length of the first telescopic part. The relationship between the length of the first telescopic part and the working state of the range hood is also negatively correlated. The higher the working state of the range hood, that is, the higher the working gear, the shorter the corresponding length of the first telescopic part; the lower the working gear of the range hood, the longer the corresponding length of the first telescopic part. And the relationship between the working state of the range hood and the flipping angle of the smoke collecting plate is positively correlated. The higher the working gear, the larger the corresponding flipping angle of the smoke collecting plate; the lower the working gear, the smaller the corresponding flipping angle of the smoke collecting plate. That is, the higher the working gear of the range hood, the higher the controlled temperature of the first telescopic part, the shorter the length, and the larger the flipping angle of the smoke collecting plate; the lower the working gear of the range hood, the lower the controlled temperature of the first telescopic part, the longer the length, and the smaller the flipping angle of the smoke collecting plate.

[0097] S2301. When the current flipping angle of the smoke collecting plate is less than the flipping angle of the smoke collecting plate corresponding to the current working state of the range hood, increase the temperature value of the first telescopic part to cause the first telescopic part to contract, drive the rotating part to rotate in a first rotation direction, and drive the smoke collecting plate to increase the flipping angle, including: when the smoke collecting plate is at the initial flipping angle θ0 and the current working state of the range hood is the first working gear, adjust the first telescopic part to the first preset temperature value T1; when the smoke collecting plate is at the first flipping angle θ1 and the current working state of the range hood is the second working gear, adjust the first telescopic part to the second preset temperature value T2; when the smoke collecting plate is at the second flipping angle θ2 and the current working state of the range hood is the third working gear, adjust the first telescopic part to the third preset temperature value T3.

[0098] Specifically, when the current flipping angle of the smoke collecting plate is less than the flipping angle of the smoke collecting plate corresponding to the current working state of the range hood, for example, when the current working state of the range hood is the first working gear and the current flipping angle of the smoke collecting plate is the flipping angle corresponding to the shutdown state, that is, the smoke collecting plate is not opened. At this time, it is necessary to increase the flipping angle of the smoke collecting plate so that the current flipping angle of the smoke collecting plate matches the current working state of the range hood. That is to say, when it is determined that the current flipping angle of the smoke collecting plate is the initial flipping angle θ0 and the determined current working state of the range hood is the first working gear, it is necessary to increase the flipping angle of the smoke collecting plate to the first flipping angle θ1 corresponding to the first working gear. At this time, adjust the temperature value of the first telescopic part to the first preset temperature value T1 corresponding to the first working gear, so that the length of the first telescopic part shrinks to the length corresponding to the first working gear, and drive the rotating part to rotate along the first rotation direction, that is, the counterclockwise direction, to drive the smoke collecting plate to flip to the first flipping angle θ1 corresponding to the first working gear. When it is determined that the current flipping angle of the smoke collecting plate is the first flipping angle θ1 and the determined current working state of the range hood is the second working gear, it is necessary to increase the flipping angle of the smoke collecting plate to the second flipping angle θ2 corresponding to the second working gear. At this time, adjust the temperature value of the first telescopic part to the second preset temperature value T2 corresponding to the second working gear, so that the length of the first telescopic part shrinks to the length corresponding to the second working gear, and drive the rotating part to rotate along the first rotation direction, that is, the counterclockwise direction, to drive the smoke collecting plate to flip to the second flipping angle θ2 corresponding to the second working gear. When it is determined that the current flipping angle of the smoke collecting plate is the second flipping angle θ2 and the determined current working state of the range hood is the third working gear, it is necessary to increase the flipping angle of the smoke collecting plate to the third flipping angle θ3 corresponding to the third working gear. At this time, adjust the temperature value of the first telescopic part to the third preset temperature value T3 corresponding to the third working gear, so that the length of the first telescopic part shrinks to the length corresponding to the third working gear, and drive the rotating part to rotate along the first rotation direction, that is, the counterclockwise direction, to drive the smoke collecting plate to flip to the third flipping angle θ3 corresponding to the third working gear. By increasing the working gear, the real-time matching between the current working state of the range hood and the current flipping angle of the smoke collecting plate is ensured.

[0099] In another specific embodiment, optionally, the working states of the range hood include a shutdown state, a first working gear, a second working gear, and a third working gear; in the shutdown state, the smoke collecting plate is at an initial flipping angle θ0; the second telescopic part is at a fourth length L4, and the corresponding controlled temperature is a fourth preset temperature value T4; in the first working gear, the smoke collecting plate is at a first flipping angle θ1; the second telescopic part is at a fifth length L5, and the corresponding controlled temperature is a fifth preset temperature value T5; in the second working gear, the smoke collecting plate is at a second flipping angle θ2; the second telescopic part is at a sixth length L6, and the corresponding controlled temperature is a sixth preset temperature value T6; in the third working gear, the smoke collecting plate is at a third flipping angle θ3; where L4 < L5 < L6; T4 > T5 > T6; θ0 < θ1 < θ2 < θ3. That is to say, the relationship between the length of the second telescopic part and the controlled temperature is negatively correlated. The higher the controlled temperature, the shorter the corresponding length of the second telescopic part; the lower the controlled temperature, the longer the corresponding length of the second telescopic part. The relationship between the length of the second telescopic part and the working state of the range hood is positively correlated. The higher the working state of the range hood, that is, the higher the working gear, the longer the corresponding length of the second telescopic part; the lower the working gear of the range hood, the shorter the corresponding length of the second telescopic part. And the relationship between the working state of the range hood and the flipping angle of the smoke collecting plate is positively correlated. The higher the working gear, the larger the corresponding flipping angle of the smoke collecting plate; the lower the working gear, the smaller the corresponding flipping angle of the smoke collecting plate. That is, the higher the working gear of the range hood, the lower the controlled temperature of the second telescopic part, the longer the length, and the larger the flipping angle of the smoke collecting plate; the lower the working gear of the range hood, the higher the controlled temperature of the second telescopic part, the shorter the length, and the smaller the flipping angle of the smoke collecting plate.

[0100] S2401. When the current flipping angle of the smoke collecting plate is greater than the flipping angle of the smoke collecting plate corresponding to the current working state of the range hood, increase the temperature value of the second telescopic part to cause the second telescopic part to contract, drive the rotating part to rotate in the second rotation direction, and drive the smoke collecting plate to reduce the flipping angle, including: when the smoke collecting plate is at the third flipping angle θ3 and the current working state of the range hood is the second working gear, adjust the second telescopic part to the sixth preset temperature value T6; when the smoke collecting plate is at the second flipping angle θ2 and the current working state of the range hood is the first working gear, adjust the second telescopic part to the fifth preset temperature value T5; when the smoke collecting plate is at the first flipping angle θ1 and the current working state of the range hood is the shutdown state, adjust the second telescopic part to the fourth preset temperature value T4.

[0101] Specifically, when the current flipping angle of the smoke collecting plate is greater than the flipping angle of the smoke collecting plate corresponding to the current working state of the range hood, for example, when the current working state of the range hood is the first working gear and the current flipping angle of the smoke collecting plate is the flipping angle corresponding to the second working gear, it is necessary to reduce the flipping angle of the smoke collecting plate so that the current flipping angle of the smoke collecting plate matches the current working state of the range hood. That is to say, when it is determined that the current flipping angle of the smoke collecting plate is the third flipping angle θ3 corresponding to the third working gear, and the determined current working state of the range hood is the second working gear, it is necessary to reduce the flipping angle of the smoke collecting plate to the second flipping angle θ2 corresponding to the second working gear. At this time, the temperature value of the second telescopic part is adjusted to the sixth preset temperature value T6 corresponding to the second working gear, so that the length of the second telescopic part contracts to the length corresponding to the second working gear, and the rotating part is driven to rotate along the second rotation direction, that is, the clockwise direction, so as to drive the smoke collecting plate to flip to the second flipping angle θ2 corresponding to the second working gear. When it is determined that the current flipping angle of the smoke collecting plate is the second flipping angle θ2 corresponding to the second working gear, and the determined current working state of the range hood is the first working gear, it is necessary to reduce the flipping angle of the smoke collecting plate to the first flipping angle θ1 corresponding to the first working gear. At this time, the temperature value of the second telescopic part is adjusted to the fifth preset temperature value T5 corresponding to the first working gear, so that the length of the second telescopic part contracts to the length corresponding to the first working gear, and the rotating part is driven to rotate along the second rotation direction, that is, the clockwise direction, so as to drive the smoke collecting plate to flip to the first flipping angle θ1 corresponding to the first working gear. When it is determined that the current flipping angle of the smoke collecting plate is the first flipping angle θ1 corresponding to the first working gear, and the determined current working state of the range hood is the shutdown state, it is necessary to reduce the flipping angle of the smoke collecting plate to the initial flipping angle θ0 corresponding to the shutdown state. At this time, the temperature value of the second telescopic part is adjusted to the fourth preset temperature value T4 corresponding to the shutdown state, so that the length of the second telescopic part contracts to the length corresponding to the shutdown state, and the rotating part is driven to rotate along the second rotation direction, that is, the clockwise direction, so as to drive the smoke collecting plate to flip to the initial flipping angle θ0 corresponding to the shutdown state. By reducing the working gear, the real-time matching between the current working state of the range hood and the current flipping angle of the smoke collecting plate is ensured.

[0102] Optionally, θ3 - θ2 = θ2 - θ1 = θ1 - θ0, that is, the difference between the flipping angles of the smoke collecting plate corresponding to two adjacent working gears in the working state of the range hood is equal. In this way, the change value of the flipping angle of the smoke collecting plate is always ensured to be the same during the process of increasing and decreasing the working gear of the range hood, optimizing the smoking effect and enhancing the working stability of the range hood.

[0103] Embodiment III

[0104] Figure 5The flowchart of a control method for a range hood provided in Embodiment 3 of the present invention. Before the step S110 in the above embodiment of "constantly determining the current working state of the range hood" in this embodiment, the following steps are further added:

[0105] Use a smoke sensor to constantly detect the smoke concentration during the cooking process;

[0106] According to the smoke concentration during the cooking process, constantly adjust the current working state of the range hood.

[0107] For the content not elaborated in this embodiment, reference can be made to the above embodiment, which will not be repeated here.

[0108] As Figure 5 shown, the method includes:

[0109] S310. Use a smoke sensor to constantly detect the smoke concentration during the cooking process.

[0110] S320. According to the smoke concentration during the cooking process, constantly adjust the current working state of the range hood.

[0111] Among them, the working states of the range hood include the first working gear, the second working gear, and the third working gear. The power of the range hood in the first working gear, the second working gear, and the third working gear increases in sequence, and the rotation speed of the range hood increases in sequence.

[0112] Among them, this step can be refined as: when the smoke concentration is in the first concentration range [0, c1), adjust the current working state of the range hood to the first working gear; when the smoke concentration is in the second concentration range [c1, c2), adjust the current working state of the range hood to the second working gear; when the smoke concentration is in the third concentration range [c2, +∞), adjust the current working state of the range hood to the third working gear; where c1 < c2.

[0113] Specifically, when determining the current working state of the range hood, a smoke sensor can be used to detect the smoke concentration of the oil fumes generated by the user during cooking in real time, and the current working state of the range hood can be adjusted in real time according to the detected smoke concentration. That is to say, when it is detected that the smoke concentration is in the first concentration range [0, c1), that is, 0 ≤ c < c1, it indicates that less oil fumes are generated and the user may be cooking foods such as steaming. At this time, a large working power is not required, so the current working state of the range hood is adjusted to the first working gear. When it is detected that the smoke concentration is in the second concentration range [c1, c2), that is, the smoke concentration c1 ≤ c < c2, it indicates that more oil fumes are generated and the user may be cooking foods such as frying and stir-frying. The first working gear with the smallest power cannot completely exhaust the oil fumes, so the current working state of the range hood is adjusted to the second working gear. When it is detected that the smoke concentration is in the third concentration range [c2, +∞), that is, the smoke concentration c ≥ c2, it indicates that a large amount of oil fumes are generated and the user may be cooking foods such as deep-frying. The first working gear and the second working gear with lower power cannot completely exhaust the oil fumes, and the range hood needs to be adjusted to the maximum working gear, so the current working state of the range hood is adjusted to the third working gear.

[0114] S330. Determine the current working state of the range hood in real time.

[0115] S340. Determine the current flipping angle of the smoke collecting plate in real time.

[0116] S350. Adjust the temperature of the shape memory alloy structure according to the current working state of the range hood and the current flipping angle of the smoke collecting plate, so that the shape memory alloy structure deforms, drives the rotating member to rotate, and drives the smoke collecting plate to flip.

[0117] The technical solution of the embodiment of the present invention uses a smoke sensor to detect the smoke concentration during cooking in real time; and adjusts the current working state of the range hood in real time according to the smoke concentration during cooking. By using the above method, the current working state of the range hood is accurately determined according to the smoke concentration detected by the smoke sensor in real time, ensuring that the oil fumes are completely exhausted and improving the user experience.

[0118] In another specific embodiment, optionally, before S110, determining the current working state of the range hood in real time, it further includes: obtaining the cooking mode selected by the user in real time; and adjusting the current working state of the range hood in real time according to the cooking mode selected by the user.

[0119] Specifically, when adjusting the current working state of the range hood, in addition to being able to detect the smoke concentration generated during cooking in real time through a smoke sensor, the user can also select the cooking mode by themselves. In this embodiment, the cooking mode can be the range hood gear set by buttons or a touch screen, that is, the user judges by themselves what working gear the range hood needs to fully absorb and discharge the cooking fumes generated during cooking, and then selects the corresponding working gear. By obtaining the cooking mode selected by the user in real time and adjusting the current working state of the range hood in real time according to the cooking mode selected by the user, that is, if the user selects the first working gear, the current working state of the range hood is adjusted to the first working gear; if the user selects the second working gear, the current working state of the range hood is adjusted to the second working gear; if the user selects the third working gear, the current working state of the range hood is adjusted to the third working gear.

[0120] Embodiment 4

[0121] This embodiment will illustrate the complete working process of the control method of the range hood. Figure 6 It is a flowchart of a control method for a range hood provided in Embodiment 4 of the present invention. Refer to Figure 6 As shown, taking the determination method of the target working gear as the smoke concentration as an example, the method includes:

[0122] S1. After the range hood is turned on, select the target working gear according to the smoke concentration.

[0123] The specific steps are as follows: Control the range hood to turn on, identify the smoke concentration through the smoke concentration, determine the smoke concentration c, and compare the size of c with the preset smoke concentration thresholds c1 and c2. Among them, the smoke concentration can be specifically detected by a smoke sensor. When the smoke concentration c < c1, the range hood is adjusted to the first working gear with a rotation speed of n1; when the smoke concentration c1 ≤ c < c2, the range hood is adjusted to the second working gear with a rotation speed of n2; when the smoke concentration c ≥ c2, the range hood is adjusted to the third working gear with a rotation speed of n3.

[0124] S2. Under the current working gear of the range hood, detect the change of the smoke concentration in real time and judge and adjust the range hood gear and the angle of the smoke collecting plate.

[0125] The specific steps are as follows: Identify the smoke concentration and judge the smoke concentration under the current working gear of the range hood, and adjust the working gear of the range hood and control the temperature of the first telescopic part and / or the second telescopic part of the smoke collecting plate according to the smoke concentration. When controlling the temperature of the first telescopic part and / or the second telescopic part of the smoke collecting plate, it is necessary to identify the temperature and judge whether the target temperature is reached to determine whether the smoke collecting plate is adjusted in place.

[0126] Among them, it should be noted that since the range hood gear will be adjusted in real time according to the smoke concentration, the switching order between different working gears will affect the judgment and adjustment of the smoke collecting plate. In other words, the judgment and adjustment of the smoke collecting plate in the current working gear also depend on the working gear of the range hood and the state of the smoke collecting plate in the previous state. Therefore, it is necessary to further divide the three working gears of the above range hood here:

[0127] Rise to the first working gear, indicating that the working state of the range hood rises to the first working gear;

[0128] Rise to the second working gear, indicating that the working state of the range hood rises to the second working gear;

[0129] Rise to the third working gear, indicating that the working state of the range hood rises to the third working gear;

[0130] Drop to the second working gear, indicating that the working state of the range hood drops to the second working gear;

[0131] Drop to the first working gear, indicating that the working state of the range hood drops to the first working gear.

[0132] Based on this, the following refers to Figure 6 , and the real-time adjustment process in each working gear in the above S2 is explained as follows:

[0133] When the range hood is in the state of rising to the first working gear, that is, rising to the first working gear, control the temperature of the first telescopic part to reach the first preset temperature value T1, and the second telescopic part does not move. At this time, the temperature sensor 1 identifies the temperature of the first telescopic part. If the temperature sensor 1 detects that the temperature of the first telescopic part reaches the first preset temperature value T1, and the temperature sensor 2 detects that the temperature of the second telescopic part is less than T0, at this time, the smoke collecting plate opens the first working gear, and the first flipping angle is θ1.

[0134] When the range hood is in the state of rising to the second working gear, that is, rising from the shutdown state or the first working gear to the second working gear, control the temperature of the first telescopic part to reach the first preset temperature value T2, and the second telescopic part does not move. At this time, the temperature sensor 1 identifies the temperature of the first telescopic part. If the temperature sensor 1 detects that the temperature of the first telescopic part reaches the second preset temperature value T2, and the temperature sensor 2 detects that the temperature of the second telescopic part is less than T0, at this time, the smoke collecting plate opens the second working gear, and the second flipping angle is θ2.

[0135] When the range hood is at the third working gear, that is, when it rises from the off state or the first working gear or the second working gear to the third working gear, control the temperature of the first telescopic part to reach the first preset temperature value T3, and the second telescopic part does not move. At this time, the temperature sensor 1 identifies the temperature of the first telescopic part. If the temperature sensor 1 detects that the temperature of the first telescopic part reaches the third preset temperature value T3 and the temperature sensor 2 detects that the temperature of the second telescopic part is less than T0, the smoke collecting plate is opened at the third working gear, and the third flipping angle is θ3.

[0136] When the range hood is at the first working gear during descent, that is, when it descends from the second working gear or the third working gear to the first working gear, the first telescopic part does not move, and control the temperature of the second telescopic part to reach the fifth preset temperature value T5. The two temperature sensors respectively identify the temperatures of the first telescopic part and the second telescopic part. When the temperature of the first telescopic part is less than T0 and the temperature of the second telescopic part reaches the fifth preset temperature value T5, the smoke collecting plate is opened at the first gear, and the first flipping angle is θ1.

[0137] When the range hood is at the second working gear during descent, that is, when it descends from the third working gear to the second working gear, the first telescopic part does not move, and control the temperature of the second telescopic part to reach the sixth preset temperature value T6. The two temperature sensors respectively identify the temperatures of the first telescopic part and the second telescopic part. When the temperature of the first telescopic part is less than T0 and the temperature of the second telescopic part reaches the sixth preset temperature value T6, the smoke collecting plate is opened at the second gear, and the second flipping angle is θ2.

[0138] It should be noted that when the range hood is at the first working gear during ascent or descent, it means that the oil fume concentration is relatively small during the current cooking process, and the cooking process may end. In this working state, the range hood can receive the range hood off command, that is, it can be manually turned off. At this time, the first telescopic part does not move, and control the temperature of the second telescopic part to reach the fourth preset temperature value T4; the two temperature sensors respectively identify the temperatures of the first telescopic part and the second telescopic part. When the temperature of the first telescopic part is less than T0 and the temperature of the second telescopic part reaches the fourth preset temperature value T4, the smoke collecting plate is completely closed, and then the second telescopic part can be powered off, and the smoke collecting plate remains in the off state.

[0139] Embodiment 5

[0140] The embodiment of the present invention provides a range hood for implementing the control method of the range hood as described above; refer to Figure 2 and Figure 3As shown in the figure, the range hood includes a smoke collecting plate 1, a rotating member 2, a shape memory alloy structure 3, and a temperature regulating structure 4. One end of the rotating member 2 is connected to the smoke collecting plate 1, and the shape memory alloy structure 3 is connected to the other end of the rotating member 2. The temperature regulating structure 4 is disposed adjacent to the shape memory alloy structure 3 and is used to adjust the temperature of the shape memory alloy structure 3 so that the shape memory alloy structure 3 deforms, driving the rotating member 2 to rotate and driving the smoke collecting plate 1 to flip.

[0141] Specifically, by connecting one end of the rotating member 2 to the smoke collecting plate 1 and the other end to the shape memory alloy structure 3, and disposing the temperature regulating structure 4 adjacent to the shape memory alloy structure 3. By energizing the temperature regulating structure 4, the power of the temperature regulating structure 4 changes, so that the heating temperature of the temperature regulating structure 4 changes. When the temperature of the temperature regulating structure 4 changes, the temperature of the shape memory alloy structure 3 disposed adjacent to the temperature regulating structure 4 changes synchronously. The shape memory alloy structure 3 undergoes telescopic deformation according to the temperature change under the action of temperature. In this embodiment, the deformation is manifested as a change in length, that is, the length of the shape memory alloy structure 3 changes under the action of temperature. The length change of the shape memory alloy structure 3 drives the rotating member 2 to rotate in a certain direction, and the smoke collecting plate 1 is driven to flip during the rotation, so that the smoke collecting plate 1 flips to a preset flipping angle, realizing the opening or closing of the smoke collecting plate 1. Among them, the relationship between the heating temperature of the temperature regulating structure 4 and the deformation amount of the shape memory alloy structure 3 can be positively correlated or negatively correlated. Taking the relationship between the heating temperature of the temperature regulating structure 4 and the deformation amount of the shape memory alloy structure 3 as an example of positive correlation, that is, the higher the heating temperature of the temperature regulating structure 4, the higher the temperature acting on the shape memory alloy structure 3, the greater the deformation amount of the shape memory alloy structure 3, that is, the shorter the length of the shape memory alloy structure 3, the greater the rotation angle when driving the rotating member 2 to rotate, the greater the flipping angle of the rotating member 2 driving the smoke collecting plate 1, that is, the greater the opening angle of the smoke collecting plate 1, the higher the working gear of the range hood, and the stronger the oil fume suction ability. By controlling the temperature acting on the shape memory alloy structure 3, the deformation amount of the shape memory alloy structure 3 can be determined, and thus the flipping angle of the smoke collecting plate 1 can be determined.

[0142] In the technical solution of the embodiment of the present invention, one end of the rotating member is connected to the smoke collecting plate, the other end is connected to the shape memory alloy structure, and the temperature regulating structure is arranged adjacent to the shape memory alloy structure. After the temperature regulating structure is powered on, the temperature of the shape memory alloy structure will increase, so that the shape memory alloy structure deforms, that is, the length of the shape memory alloy structure changes, thereby driving the rotating block to rotate. During the rotation of the rotating block, the smoke collecting plate is driven to flip synchronously, realizing the opening or closing of the smoke collecting plate. With the above structure, while ensuring the intelligent control of the range hood, the volume of the range hood is reduced, the operation cost and maintenance cost of the range hood are reduced, and the user experience is improved.

[0143] It should be understood that various forms of the processes shown above can be used, steps can be reordered, added or deleted. For example, the steps described in the present invention can be executed in parallel, sequentially or in a different order, as long as the desired results of the technical solution of the present invention can be achieved, and no limitation is made herein.

[0144] The above specific embodiments do not constitute a limitation on the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for controlling a range hood, characterized in that: The range hood comprises a smoke collecting plate, a rotating member, a shape memory alloy structure and a temperature regulating structure; one end of the rotating member is connected to the smoke collecting plate, and the shape memory alloy structure is connected to the other end of the rotating member; The control method includes: Determine the current working status of the range hood in real time; Determine the current flip angle of the smoke collecting plate in real time; According to the current working state of the smoke machine and the current flipping angle of the smoke collecting plate, the temperature of the shape memory alloy structure is adjusted to deform the shape memory alloy structure, drive the rotating part to rotate, and drive the smoke collecting plate to flip.

2. The control method according to claim 1, characterized in that: According to the current working state of the smoke machine and the current flipping angle of the smoke collecting plate, the temperature of the shape memory alloy structure is adjusted to deform the shape memory alloy structure, drive the rotating member to rotate, and drive the smoke collecting plate to flip, including: When the current flip angle of the smoke collecting plate is less than the corresponding flip angle of the smoke collecting plate in the current working state of the smoke collecting machine, the temperature of the shape memory alloy structure is adjusted to deform the shape memory alloy structure, drive the rotating part to rotate, and drive the smoke collecting plate to increase the flip angle; When the current flipping angle of the smoke collecting plate is greater than the corresponding flipping angle of the smoke collecting plate under the current working state of the smoke collecting machine, the temperature of the shape memory alloy structure is adjusted to deform the shape memory alloy structure, drive the rotating part to rotate, and drive the smoke collecting plate to reduce the flipping angle.

3. The control method according to claim 2, characterized in that: The rotating member is provided with a sleeve portion, and the sleeve portion is sleeved on a fixed shaft; The shape memory alloy structure comprises a first telescopic portion and a second telescopic portion; the first telescopic portion and the second telescopic portion are both made of shape memory alloy, the first telescopic portion undergoes telescopic deformation along a first direction at different temperatures, and the second telescopic portion undergoes telescopic deformation along a second direction at different temperatures, and the first direction and the second direction are both tangent to the sleeve portion; One end of the first telescopic portion is fixed, and the other end is at least partially fixed on the outer wall of the sleeve portion; one end of the second telescopic portion is fixed, and the other end is at least partially fixed on the outer wall of the sleeve portion; the sleeve portion is located between the first telescopic portion and the second telescopic portion; When the current flip angle of the smoke collecting plate is less than the corresponding flip angle of the smoke collecting plate in the current working state of the smoke collecting machine, the temperature of the shape memory alloy structure is adjusted to deform the shape memory alloy structure, drive the rotating member to rotate, and drive the smoke collecting plate to increase the flip angle, including: When the current flipping angle of the smoke collecting plate is less than the corresponding flipping angle of the smoke collecting plate in the current working state of the smoke collecting machine, the temperature value of the first telescopic part is increased to shrink the first telescopic part, drive the rotating member to rotate in the first rotation direction, and drive the smoke collecting plate to increase the flipping angle; When the current flip angle of the smoke collecting plate is greater than the corresponding flip angle of the smoke collecting plate in the current working state of the smoke collecting machine, the temperature of the shape memory alloy structure is adjusted to deform the shape memory alloy structure, drive the rotating member to rotate, and drive the smoke collecting plate to reduce the flip angle, including: When the current flip angle of the smoke collecting plate is greater than the corresponding flip angle of the smoke collecting plate in the current working state of the smoke collecting machine, the temperature value of the second telescopic part is increased to shrink the second telescopic part, drive the rotating member to rotate in the second rotation direction, and drive the smoke collecting plate to reduce the flip angle; Wherein, the first rotation direction and the second rotation direction are opposite.

4. The control method according to claim 3, characterized in that: The working state of the range hood includes an off state, a first working gear, a second working gear and a third working gear; In the shutdown state, the smoke collecting plate is at an initial flip angle θ0; In the first working position, the smoke collecting plate is at a first flip angle θ1; the first telescopic portion is at a first length L1, and the corresponding control temperature is a first preset temperature value T1; In the second working gear, the smoke collecting plate is at a second flip angle θ2; the first telescopic portion is at a second length L2, and the corresponding control temperature is a second preset temperature value T2; In the third working gear, the smoke collecting plate is at a third flip angle θ3; the first telescopic portion is at a third length L3, and the corresponding control temperature is a third preset temperature value T3; Among them, L1>L2>L3; T1<T2<T3; θ0<θ1<θ2<θ3; When the current flip angle of the smoke collecting plate is less than the corresponding flip angle of the smoke collecting plate in the current working state of the smoke collecting machine, the temperature value of the first telescopic part is increased to shrink the first telescopic part, drive the rotating member to rotate in the first rotation direction, and drive the smoke collecting plate to increase the flip angle, including: When the smoke collecting plate is at an initial flip angle θ0 and the current working state of the range hood is the first working gear, adjusting the first telescopic portion to the first preset temperature value T1; When the smoke collecting plate is at the first flip angle θ1 and the current working state of the range hood is the second working gear, adjusting the first telescopic part to the second preset temperature value T2; When the smoke collecting plate is at the second flip angle θ2 and the current working state of the range hood is the third working gear, the first telescopic portion is adjusted to the third preset temperature value T3.

5. The control method according to claim 3, characterized in that: The working state of the range hood includes an off state, a first working gear, a second working gear and a third working gear; In the off state, the smoke collecting plate is at an initial flip angle θ0; the second telescopic portion is at a fourth length L4, and the corresponding control temperature is a fourth preset temperature value T4; In the first working position, the smoke collecting plate is at a first flip angle θ1; the second telescopic portion is at a fifth length L5, and the corresponding control temperature is a fifth preset temperature value T5; In the second working gear, the smoke collecting plate is at a second flip angle θ2; the second telescopic portion is at a sixth length L6, and the corresponding control temperature is a sixth preset temperature value T6; In the third working position, the smoke collecting plate is at a third flipping angle θ3; Among them, L4<L5<L6; T4>T5>T6; θ0<θ1<θ2<θ3; When the current flip angle of the smoke collecting plate is greater than the corresponding flip angle of the smoke collecting plate in the current working state of the smoke collecting machine, the temperature value of the second telescopic part is increased to shrink the second telescopic part, drive the rotating member to rotate in the second rotation direction, and drive the smoke collecting plate to reduce the flip angle, including: When the smoke collecting plate is at the third flip angle θ3 and the current working state of the range hood is the second working gear, adjusting the second telescopic portion to the sixth preset temperature value T6; When the smoke collecting plate is at the second flip angle θ2 and the current working state of the range hood is the first working gear, adjusting the second telescopic portion to the fifth preset temperature value T5; When the smoke collecting plate is at the first flip angle θ1 and the current working state of the range hood is the off state, the second telescopic portion is adjusted to the fourth preset temperature value T4.

6. The control method according to claim 4 or 5, characterized in that: θ3-θ2=θ2-θ1=θ1-θ0.

7. The control method according to claim 1, characterized in that: Before determining the current working status of the range hood in real time, it also includes: Get the cooking mode selected by the user in real time; According to the cooking mode selected by the user, the current working state of the range hood is adjusted in real time.

8. The control method according to claim 1, characterized in that: Before determining the current working status of the range hood in real time, it also includes: Use smoke sensors to detect smoke concentration in real time during cooking; According to the smoke concentration during the cooking process, the current working state of the range hood is adjusted in real time.

9. The control method according to claim 8, characterized in that: The working states of the range hood include a first working gear, a second working gear and a third working gear; According to the smoke concentration during the cooking process, the current working state of the range hood is adjusted in real time, including: When the smoke concentration is in the first concentration interval [0, c1), adjusting the current working state of the range hood to the first working gear; When the smoke concentration is in the second concentration interval [c1, c2), adjusting the current working state of the range hood to the second working gear; When the smoke concentration is in the third concentration interval [c2, +∞), adjusting the current working state of the range hood to the third working gear; Among them, c1<c2.

10. A range hood, characterized in that: Used to execute the control method of the range hood according to any one of claims 1 to 9; the range hood comprises: Smoke collecting plate (1); A rotating member (2), one end of which is connected to the smoke collecting plate (1); A shape memory alloy structure (3) connected to the other end of the rotating member (2); A temperature regulating structure (4) is arranged adjacent to the shape memory alloy structure (3) and is used to regulate the temperature of the shape memory alloy structure (3) so as to cause the shape memory alloy structure (3) to deform, drive the rotating member (2) to rotate, and drive the smoke collecting plate (1) to flip.

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