A range hood and a control method and device thereof

Abstract

The application discloses an extractor hood and a control method and device thereof, the extractor hood comprising a body, a damper and a rotating shaft, the body comprising a wind port setting area, one side of the damper being rotatably connected to the body through the rotating shaft, the damper shielding the wind port setting area when the damper is in a closed state, comprising: acquiring actual position relationship information and preset position relationship information of the damper and the body in real time when the extractor hood is in a running state; detecting the existence of foreign matters between the damper and the body according to the actual position relationship information and the preset position relationship information; and controlling the extractor hood to stop running when it is determined that foreign matters exist between the damper and the body, so that the extractor hood can be timely controlled to stop running when it is determined that foreign matters exist between the damper and the body, the foreign matters can be timely avoided from being sucked into the body and being involved in the impeller, the use safety of the extractor hood is improved, and the failure rate of the extractor hood is effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of control technology for range hoods, and more particularly to a range hood and its control method and device. Background Technology

[0002] Currently, most range hoods on the market only have the function of preventing foreign objects from entering from the outside. They can close the exhaust pipe when not venting smoke to block foreign objects from entering the room. When venting smoke, they can use the power of the smoke to open the check valve without affecting the exhaust of smoke when the range hood is working. They can prevent foreign objects from entering the range hood and causing it to stop working, or from entering the room and causing trouble. However, they cannot prevent the range hood from sucking foreign objects from the room into the machine when it is venting smoke.

[0003] To avoid the grease trap affecting the amount of smoke intake and the cleanliness of grease buildup, most existing products no longer use honeycomb-shaped grease traps, but instead use grid-shaped ones. However, this inevitably allows foreign objects to be sucked into the flue through the grid. In recent years, people have been spending more and more time in the kitchen, and there have been too many cases of kitchen paper towels and plastic bags being sucked into the machine and caught in the impeller, resulting in a poor user and safety experience, and an extremely high failure and repair rate. Summary of the Invention

[0004] This invention provides a range hood and its control method and device to prevent foreign objects from being sucked into the machine body when the range hood is absorbing cooking fumes.

[0005] According to one aspect of the present invention, a control method for a range hood is provided. The range hood includes a body, a damper, and a rotating shaft. The body includes an air vent area. One side of the damper is rotatably connected to the body via the rotating shaft. When the damper is in a closed state, the damper blocks the air vent area. The method includes:

[0006] When the range hood is in operation, the actual positional relationship information and preset positional relationship information between the air damper and the machine body are acquired in real time.

[0007] Based on the actual positional relationship information and the preset positional relationship information, the presence of foreign objects between the damper and the body is detected;

[0008] When a foreign object is detected between the damper and the body, the range hood is controlled to stop operating.

[0009] Optionally, the actual positional relationship includes the actual distance between the damper and the machine body, and the preset positional relationship includes the preset distance between the damper and the air outlet area;

[0010] Based on the actual positional relationship information and the preset positional relationship information, the presence of foreign objects between the damper and the body is detected, including:

[0011] Determine whether the actual distance is less than the preset distance;

[0012] If so, it is determined that there is a foreign object between the damper and the body.

[0013] Optionally, the actual positional relationship further includes: the actual angle at which the damper opens; the preset positional relationship further includes: the preset angle at which the damper opens.

[0014] After determining that the actual distance is less than the preset distance, the method further includes:

[0015] Determine whether the actual angle is equal to the preset angle;

[0016] If so, it is determined that there is a foreign object between the damper and the body.

[0017] Optionally, before controlling the range hood to stop operating, the following steps are also included:

[0018] Obtain the infrared sensing signal of the foreign object;

[0019] The infrared sensor signal is used to determine whether the foreign object is a human hand.

[0020] If not, then control the range hood to stop operating.

[0021] Optionally, the preset positional relationship between the damper and the machine body is acquired in real time, including:

[0022] The operating level of the range hood is obtained in real time;

[0023] The preset positional relationship between the damper and the machine body is determined based on the operating gear.

[0024] Optionally, the control method for the range hood further includes:

[0025] When it is determined that there are no foreign objects between the damper and the body, the range hood is controlled to operate according to the gear control signal, and the steps of acquiring the actual positional relationship information and preset positional relationship information of the damper and the body in real time when the range hood is in operation are executed.

[0026] According to another aspect of the present invention, a control device for a range hood is provided. The range hood includes a body and a damper. The range hood includes a body, a damper, and a rotating shaft. The body includes an air vent area. One side of the damper is rotatably connected to the body via the rotating shaft. When the damper is in a closed state, the damper blocks the air vent area, including:

[0027] The information acquisition module is used to acquire, in real time, the actual positional relationship information between the air damper and the body and the preset positional relationship information when the range hood is in operation.

[0028] The detection module is used to detect the presence of foreign objects between the damper and the body based on the actual positional relationship information and the preset positional relationship information.

[0029] The operation control module is used to control the range hood to stop operating when it is determined that there is a foreign object between the damper and the body.

[0030] According to another aspect of the present invention, a range hood is provided, comprising a body, an air damper, a rotating shaft, an information acquisition device, and a controller;

[0031] The body includes an air vent area, and one side of the damper is rotatably connected to the body via the rotating shaft. When the damper is in the closed state, the damper blocks the air vent area.

[0032] The information acquisition device is used to acquire the actual positional relationship information between the damper and the machine body, and send the actual positional relationship information to the controller;

[0033] The controller is used to execute the control method of the range hood described above.

[0034] Optionally, the information acquisition device includes: a ranging sensor;

[0035] The ranging sensor is used to obtain the actual distance between the damper and the machine body, and sends the actual distance to the controller;

[0036] Alternatively, the information acquisition device may further include: an angle sensor;

[0037] The angle sensor is used to obtain the actual opening angle of the damper and send the actual angle to the controller.

[0038] Optionally, the range hood further includes: an infrared sensor;

[0039] The infrared sensor is used to acquire the infrared sensing signal of the foreign object and send the infrared sensing signal to the controller.

[0040] The range hood control method provided in this invention acquires real-time information on the actual and preset positional relationships between the damper and the body when the range hood is in operation. Based on the actual and preset positional relationships, it detects whether there are foreign objects between the damper and the body. Thus, when foreign objects are detected between the damper and the body, the range hood can be stopped in time, preventing foreign objects from being sucked into the body and rolled into the impeller. This improves the safety of using the range hood and effectively reduces its failure rate.

[0041] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a schematic diagram of the structure of a range hood provided in an embodiment of the present invention;

[0044] Figure 2 This is a schematic diagram of another range hood provided in an embodiment of the present invention;

[0045] Figure 3 This is a flowchart of a control method for a range hood provided in an embodiment of the present invention;

[0046] Figure 4 This is a flowchart of another control method for a range hood provided in an embodiment of the present invention;

[0047] Figure 5 This is a flowchart of another control method for a range hood provided in an embodiment of the present invention;

[0048] Figure 6 This is a flowchart of another control method for a range hood provided in an embodiment of the present invention;

[0049] Figure 7 This is a schematic diagram of the structure of a control device for a range hood provided in an embodiment of the present invention;

[0050] Figure 8 This is a structural block diagram of a range hood provided in an embodiment of the invention;

[0051] Figure 9This is a structural block diagram of another range hood provided in the embodiments of the invention;

[0052] Figure 10 This is a structural block diagram of another range hood provided in the embodiments of the invention. Detailed Implementation

[0053] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0054] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0055] This invention provides a control method for a range hood that can effectively prevent foreign objects from being sucked into the range hood when it is absorbing fumes. The control method can be executed by the control device of the range hood provided in this invention. The control device can be implemented in the form of software and / or hardware, and can be configured in the controller of the range hood.

[0056] Figure 1 This is a schematic diagram of the structure of a range hood provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of another range hood provided in an embodiment of the present invention, for reference. Figure 1 or Figure 2 The range hood includes a body 1, an air damper 2, and a rotating shaft 3. The body 1 includes an air vent area 11. One side of the air damper 2 is rotatably connected to the body 1 via the rotating shaft 3. When the air damper 2 is in the closed state, the air damper 2 blocks the air vent area 11.

[0057] Specifically, the air vent area 11 is equipped with an air inlet. When the range hood is running, the damper 2 is in the position as follows: Figure 1The range hood is in the open state shown, and the fan inside is rotating, thus drawing in cooking fumes from the air inlet and expelling them into the exhaust duct. Additionally, the body 1 may include a push rod motor 4, a fixed shaft 5, and a rotating arm 6. The push rod motor 4 is fixedly connected to the rotating arm 6, and the fixed shaft 5 is used to fix the rotating arm 6. When the push rod motor 4 extends, it drives the rotating arm 6 to rotate clockwise, thereby causing the damper 2 to rotate clockwise along the rotating shaft 3. This causes the side of the damper 2 away from the rotating shaft 3 to gradually approach the body 1 until the opening angle α of the damper 2 is 0°, that is, when the angle α between the damper 2, the rotating shaft 3, and the side of the body 1 where the air vent area 11 is located is 0°, the damper 2 is in the position shown. Figure 2 The closed state is shown. When the push rod motor 4 retracts, it drives the rotating arm 3 to rotate counterclockwise, which in turn drives the damper 2 to rotate counterclockwise along the rotating shaft 6. This causes the side of the damper 2 away from the rotating shaft 3 to gradually move away from the body 1 until the opening angle α of the damper 2 gradually increases, thereby exposing the air inlet of the air outlet setting area 11, which can realize the function of absorbing oil fumes.

[0058] Figure 3 A flowchart of a control method for a range hood provided in an embodiment of the present invention is shown in the reference. Figure 1 , Figure 2 and Figure 3 The method includes:

[0059] S110. When the range hood is in operation, the actual positional relationship information and preset positional relationship information between the damper and the body are obtained in real time.

[0060] Specifically, when the range hood is in operation, the fan rotates, and the damper 2 is open, no longer obstructing the air inlet, allowing indoor fumes to be drawn into the unit 1 and discharged into the exhaust duct. During operation, the actual and preset positional relationships between the damper 2 and the unit 1 can be acquired in real time. The actual positional relationship information includes the actual opening angle of the damper and / or the actual distance between the air vent area 11 and the damper 2 in the unit 1. The preset positional relationship information includes the preset opening angle of the damper according to the range hood's operating setting, and / or the preset distance between the air vent area 11 and the damper 2 in the unit 1. Furthermore, to improve the accuracy of foreign object detection, the actual and preset positional relationships between the damper 2 and the air vent area 11 in the unit 1 can be acquired.

[0061] For example, real-time acquisition of the preset positional relationship between the damper and the air inlet includes: real-time acquisition of the operating level of the range hood; and determining the preset positional relationship between the damper and the air inlet setting area based on the operating level.

[0062] Specifically, the preset positional relationship between the damper and the air vent varies depending on the operating setting of the range hood. When the range hood is operating at a higher setting, the preset positional relationship between the damper and the air vent should ensure a larger air intake volume to guarantee the absorption rate of indoor cooking fumes. When the range hood is operating at a lower setting, the preset positional relationship between the damper and the air vent should ensure a smaller air intake volume to reduce power consumption while maintaining the absorption rate of indoor cooking fumes.

[0063] S120. Based on the actual positional relationship information and the preset positional relationship information, detect the presence of foreign objects between the damper and the machine body.

[0064] Specifically, the actual positional relationship information and the preset positional relationship information belong to the same category. That is, when the actual positional relationship information includes angle information, the preset positional relationship also includes angle information; when the actual positional relationship information includes distance information, the preset positional relationship also includes distance information. In this way, the actual positional relationship information between the damper and the machine body can be directly compared with the preset positional relationship, and the presence of foreign objects between the damper and the air inlet can be detected based on the comparison result.

[0065] S130. When it is determined that there is a foreign object between the damper and the body, control the range hood to stop operating.

[0066] Specifically, if the above test results indicate that there are foreign objects between the damper and the body, it means that the foreign objects have a tendency to fly into the body through the air inlet. At this time, the range hood can be stopped, that is, the fan in the range hood can be stopped from rotating and no longer sucking up fumes. This can prevent foreign objects from being sucked into the body in time, improve the safety of using the range hood, and effectively reduce the failure rate of the range hood.

[0067] The range hood control method provided in this invention acquires real-time information on the actual and preset positional relationships between the damper and the body when the range hood is in operation. Based on the actual and preset positional relationships, it detects whether there are foreign objects between the damper and the body. Thus, when foreign objects are detected between the damper and the body, the range hood can be stopped in time, preventing foreign objects from being sucked into the body and rolled into the impeller. This improves the safety of using the range hood and effectively reduces its failure rate.

[0068] Optionally, the actual positional relationship includes the actual distance between the damper and the air outlet setting area, and the preset positional relationship includes the preset distance between the damper and the air outlet setting area. Figure 4 This is a flowchart of another control method for a range hood provided in an embodiment of the present invention, such as... Figure 4 As shown, the control method of this range hood includes:

[0069] S210. When the range hood is in operation, the actual positional relationship information and preset positional relationship information between the damper and the body are obtained in real time.

[0070] S220. Determine if the actual distance is less than the preset distance; if yes, execute S230; if no, execute S250.

[0071] S230. Confirm that there is a foreign object between the damper and the machine body.

[0072] S240, Control the range hood to stop operating.

[0073] For details, please refer to Figure 1 The actual distance between the damper 2 and the body 1 can specifically be the actual distance between the damper 2 and the air vent area 11 on the body 1. This actual distance can be the shortest distance between the damper 2 and a point on the air vent area 11, detected by a distance measuring device. For example, it could be the shortest distance between the center point of the damper 2 and the air vent area 11, or it could be a fixed distance between two points: one on the damper 2 and the other on the air vent area 11. For example, it could be the distance between the point where the damper 2 coincides with the center point of the air vent area 11 when closed and that point. Similarly, the preset distance between the damper 2 and the body 1 can be the shortest distance between the damper 2 and the center point of the air vent area 11, set according to the operating level of the range hood, or it could be a fixed distance between two points: one on the damper 2 and the other on the air vent area 11. For ease of calculation, when the actual distance is the shortest distance, the preset distance is also the shortest distance; when the actual distance is a fixed distance, the preset distance is also a fixed distance. The preset distance between the damper 2 and the air vent setting area 11 can be related to the operating speed of the range hood. For example, the higher the operating speed of the range hood, the larger the preset distance, to ensure that the range hood has a larger air volume; the lower the operating speed of the range hood, the smaller the preset distance, to ensure that the range hood has a smaller air volume. After obtaining the actual distance and the preset distance between the damper and the unit, the actual distance can be compared with the preset distance. If there is a foreign object between the damper and the unit, the obtained actual distance should be the distance between the damper and the foreign object. Therefore, if it is determined that the actual distance is less than the preset distance, it can be determined that there is a foreign object between the damper and the unit, and the range hood should be stopped.

[0074] S250. Ensure there are no foreign objects between the damper and the machine body.

[0075] S260: Control the range hood to operate according to the gear control signal, and then return to execute S210.

[0076] Specifically, if the actual distance is equal to the preset distance, it can be determined that there are no foreign objects between the damper and the machine body. At this time, the range hood can be controlled to operate according to the gear control signal, and the actual distance between the damper and the machine body and the preset distance can be continuously obtained.

[0077] This invention obtains the actual distance and preset distance between the damper and the machine body. By comparing the actual distance and the preset distance, it detects the presence of foreign objects between the damper and the machine body. This allows for timely control of the range hood to stop operating when foreign objects are detected, thus preventing foreign objects from being sucked into the machine body and rolled into the impeller. This improves the safety of the range hood and effectively reduces its failure rate.

[0078] Optionally, the actual positional relationship also includes the actual angle at which the damper opens; the preset positional relationship also includes the preset angle at which the damper opens. Figure 5 This is a flowchart of another control method for a range hood provided in an embodiment of the present invention, such as... Figure 5 As shown, the control method of this range hood includes:

[0079] S310. When the range hood is in operation, the actual positional relationship information and preset positional relationship information between the damper and the body are obtained in real time.

[0080] S320. Determine if the actual distance is less than the preset distance; if yes, execute S330; if no, execute S360.

[0081] S330: Determine whether the actual angle is equal to the preset angle; if yes, execute S340; if no, execute S360.

[0082] S340. Confirm that there is a foreign object between the damper and the machine body.

[0083] S350, controls the range hood to stop operating.

[0084] S360. Confirm that there are no foreign objects between the damper and the machine body.

[0085] S370: Control the range hood to operate according to the gear control signal, and then return to execute S310.

[0086] Specifically, the opening angle of the damper can vary depending on the operating setting of the range hood. For example, a higher operating setting results in a larger damper angle, leading to a larger airflow and faster smoke extraction. Conversely, a lower operating setting results in a smaller damper angle, leading to a smaller airflow and slower smoke extraction. After confirming that the actual distance is less than the preset distance, it's necessary to check if the actual damper opening angle is equal to the preset angle. If the actual angle is less than the preset angle, the reason for the less-than-preset distance between the damper and the hood is likely not due to foreign objects, but rather because the damper is not opening at the preset angle. In this case, it can be confirmed that there are no foreign objects between the damper and the air inlet. If the actual angle is equal to the preset angle, the reason for the less-than-preset distance is due to foreign objects, and the range hood can be stopped. Furthermore, when the actual distance equals the preset distance, it can be directly determined that there are no foreign objects between the damper and the unit, allowing the range hood to continue operating according to the gear control signal. This avoids misjudgments of foreign object presence due to damper malfunction, further improving the accuracy of foreign object detection. This enables more precise control of the range hood, preventing frequent shutdowns due to minor damper faults and enhancing the user experience.

[0087] Optional, Figure 6 This is a flowchart of another control method for a range hood provided in an embodiment of the present invention, such as... Figure 6 As shown, the control method of this range hood includes:

[0088] S410. When the range hood is in operation, acquire the actual positional relationship information and preset positional relationship information between the damper and the body in real time.

[0089] S420. Determine if the actual distance is less than the preset distance; if yes, execute S430; if no, execute S450.

[0090] S430: Determine if the actual angle is equal to the preset angle; if yes, execute S440; if no, execute S480.

[0091] S440. Confirm that there is a foreign object between the damper and the machine body.

[0092] S450: Acquire infrared sensor signals from foreign objects.

[0093] S460. Determine whether the foreign object is a human hand based on the infrared sensor signal; if not, proceed to S470; if yes, proceed to S480.

[0094] S470, Control the range hood to stop operating.

[0095] S480. Ensure there are no foreign objects between the damper and the machine body.

[0096] S490: Control the range hood to operate according to the gear control signal, and then return to execute S410.

[0097] Specifically, during the operation of a range hood, there may be situations where a user's hand or an object is placed or waved between the air vent and the hood, or vice versa. In these cases, it can be determined that there is no risk of foreign objects being sucked into the hood, and the range hood can be controlled to operate according to the set speed control signal. Therefore, after confirming the presence of a foreign object between the air vent and the air inlet, an infrared detection device can obtain the infrared sensing signal of the object. If the infrared sensing signal determines that the foreign object between the air vent and the hood is a hand, the range hood can continue operating according to the set speed control signal without needing to shut it off. This allows for more precise control of the range hood, preventing frequent shutdowns due to user movements and improving the user experience.

[0098] Based on the same inventive concept, embodiments of the present invention provide a control device for a range hood. This control device is used to execute the control method for a range hood provided in any embodiment of the present invention. The control device can be implemented by software and / or hardware. Therefore, the control device for a range hood provided in the embodiments of the present invention includes the technical features of the control method for a range hood provided in any embodiment of the present invention, and can achieve the beneficial effects of the control method for a range hood provided in any embodiment of the present invention. Similarities can be referred to the above description of the control method for a range hood provided in the embodiments of the present invention, and will not be repeated here.

[0099] refer to Figure 1 or Figure 2 The range hood includes a body 1, an air damper 2, and a rotating shaft 3. The body 1 includes an air vent area 11. One side 2 of the air damper is rotatably connected to the body 1 via the rotating shaft 3. When the air damper 2 is in the closed state, the air damper 2 blocks the air vent area 11. Figure 7 This is a schematic diagram of the control device for a range hood provided in an embodiment of the present invention, in conjunction with reference to the reference. Figure 1 , Figure 2 and Figure 7 The control device of the range hood includes an information acquisition module 100, which is used to acquire the actual positional relationship information and preset positional relationship information between the damper and the body in real time when the range hood is in operation; a detection module 200, which is used to detect the presence of foreign objects between the damper and the body based on the actual positional relationship information and the preset positional relationship information; and an operation control module 300, which is used to control the range hood to stop operating when it is determined that there are foreign objects between the damper and the body.

[0100] The control device for the range hood provided in this embodiment of the invention can promptly stop the range hood from operating when foreign objects are detected between the damper and the body. This can prevent foreign objects from being sucked into the body and rolled into the impeller, thus improving the safety of the range hood and effectively reducing its failure rate.

[0101] Optionally, the actual positional relationship includes the actual distance between the damper and the air outlet area, and the preset positional relationship includes the preset distance between the damper and the machine body. The detection module includes a distance judgment unit for judging whether the actual distance is less than the preset distance; and a first foreign object presence determination unit for determining that a foreign object exists between the damper and the machine body when the actual distance is determined to be less than the preset distance.

[0102] Optionally, the actual positional relationship also includes: the actual angle at which the damper opens; the preset positional relationship also includes: the preset angle at which the damper opens. The detection module also includes an angle judgment unit, used to determine whether the actual angle is equal to the preset angle after determining that the actual distance is less than the preset distance; and a second foreign object presence determination unit, used to determine that there is a foreign object between the damper and the machine body when determining that the actual angle is equal to the preset angle.

[0103] Optionally, the control device of the range hood also includes an infrared sensing signal acquisition module, used to acquire the infrared sensing signal of the foreign object before the operation control module controls the range hood to stop running; a hand detection module, used to determine whether the foreign object is a hand based on the infrared sensing signal; and the operation control module is also used to control the range hood to stop running when it is determined whether the foreign object is a hand.

[0104] Optionally, the information acquisition module includes an operating gear acquisition unit for acquiring the operating gear of the range hood in real time; and a preset position relationship determination unit for determining the preset position relationship between the damper and the air outlet setting area based on the operating gear.

[0105] Optionally, the operation control module is also used to control the range hood to operate according to the gear control signal when it is determined that there are no foreign objects between the damper and the body.

[0106] Based on the same inventive concept, this invention also provides a range hood. Figure 8 This is a structural block diagram of a range hood provided in an embodiment of the invention, in conjunction with reference to the following: Figure 1 , Figure 2 and Figure 8The range hood includes a body 1, an air damper 2, a rotating shaft 3, an information acquisition device 7, and a controller 8. The body 1 includes an air vent area 11. One side of the air damper 2 is rotatably connected to the body 1 via the rotating shaft 3. When the air damper 2 is closed, it blocks the air vent area 11. The information acquisition device 7 can be mounted on the air damper 2, or it can be mounted on both the air damper 2 and the rotating shaft 3. The information acquisition device 7 is used to acquire the actual positional relationship information between the air damper and the body 1, and sends this information to the controller 8. The controller 8 can be located within the body 1 and is used to execute the control method of the range hood provided in any embodiment of the present invention. Therefore, the range hood provided in the embodiments of the present invention includes the technical features of the control method of the range hood provided in any embodiment of the present invention, and can achieve the beneficial effects of the control method of the range hood provided in any embodiment of the present invention. Similarities can be found in the above description of the control method of the range hood provided in the embodiments of the present invention, and will not be repeated here.

[0107] Optional, Figure 9 This is a structural block diagram of another range hood provided in the embodiments of the invention, such as... Figure 9 As shown, the information acquisition device 7 includes a distance sensor 71; the distance sensor 71 can be installed on the damper 2, and is used to obtain the actual distance between the damper 2 and the body 1, and send the actual distance to the controller 8. Alternatively, Figure 10 This is a structural block diagram of another range hood provided in the embodiments of the invention, such as... Figure 10 As shown, the information acquisition device 7 also includes an angle sensor 72; the angle sensor 72 can be set on the transmission shaft 3, and the angle sensor 72 is used to obtain the actual opening angle of the damper 2 and send the actual angle to the controller 8.

[0108] Specifically, when the damper is closed, the distance sensor 71 can be positioned to coincide with a point on the body 1. To improve the accuracy of foreign object detection, the distance sensor 71 can be positioned to coincide with a point on the air vent setting area 11. Thus, when the damper 2 is opened, the distance sensor 71 can measure the actual distance between itself and that point on the air vent setting area 11, and after obtaining the actual distance, send it to the controller 8. Alternatively, as... Figure 2 As shown, the information acquisition device 7 can include both a distance sensor 71 and an angle sensor 72, thus enabling the simultaneous acquisition of the actual distance and the actual opening angle of the damper.

[0109] Optional, see reference Figure 10 The range hood may also include an infrared sensor 9; the infrared sensor 9 may be installed on the damper 2, and the infrared sensor 9 is used to obtain the infrared sensing signal of foreign objects and send the infrared sensing signal to the controller 8.

[0110] The range hood provided in this embodiment of the invention can collect information on the actual positional relationship between the damper and the air vent area on the upper part of the machine body, and send the collected information to the controller. This enables the controller to execute the control method of the range hood provided in any embodiment of the invention. When it is determined that there is a foreign object between the damper and the machine body, the range hood is stopped in time, which can prevent foreign objects from being sucked into the machine body and rolled into the impeller, thus improving the safety of the range hood and effectively reducing the failure rate of the range hood.

[0111] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0112] The specific embodiments described above do not constitute a limitation on the scope of protection of this 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 principles of this invention should be included within the scope of protection of this invention.

Claims

1. A control method for a range hood, the range hood comprising a body, a damper, and a rotating shaft, the body including an air vent area, one side of the damper being rotatably connected to the body via the rotating shaft, wherein when the damper is in a closed state, the damper blocks the air vent area, characterized in that... include: When the range hood is in operation, the actual positional relationship information and preset positional relationship information between the air damper and the machine body are acquired in real time. Based on the actual positional relationship information and the preset positional relationship information, the presence of foreign objects between the damper and the body is detected; If a foreign object is detected between the damper and the body, the range hood will stop operating. The actual positional relationship includes the actual distance between the damper and the machine body, and the actual opening angle of the damper; the preset positional relationship includes the preset distance between the damper and the air outlet setting area, and the preset opening angle of the damper. Based on the actual positional relationship information and the preset positional relationship information, the presence of foreign objects between the damper and the body is detected, including: determining whether the actual distance is less than the preset distance; if so, determining whether the actual angle is equal to the preset angle. If so, it is determined that there is a foreign object between the damper and the body.

2. The control method for a range hood according to claim 1, characterized in that, Before controlling the range hood to stop operating, the following are also included: Obtain the infrared sensing signal of the foreign object; The infrared sensor signal is used to determine whether the foreign object is a human hand. If not, then control the range hood to stop operating.

3. The control method for a range hood according to claim 1, characterized in that, Real-time acquisition of the preset positional relationship between the damper and the machine body includes: The operating level of the range hood is obtained in real time; The preset positional relationship between the damper and the machine body is determined based on the operating gear.

4. The control method for a range hood according to claim 1, characterized in that, Also includes: When it is determined that there are no foreign objects between the damper and the body, the range hood is controlled to operate according to the gear control signal, and the steps of acquiring the actual positional relationship information and preset positional relationship information of the damper and the body in real time when the range hood is in operation are executed.

5. A control device for a range hood, the range hood comprising a body, a damper, and a rotating shaft, the body including an air vent area, one side of the damper being rotatably connected to the body via the rotating shaft, wherein when the damper is in a closed state, the damper blocks the air vent area, characterized in that... include: The information acquisition module is used to acquire, in real time, the actual positional relationship information between the air damper and the body and the preset positional relationship information when the range hood is in operation. The detection module is used to detect the presence of foreign objects between the damper and the body based on the actual positional relationship information and the preset positional relationship information. The operation control module is used to control the range hood to stop operating when it is determined that there is a foreign object between the damper and the body; The actual positional relationship includes the actual distance between the damper and the machine body, and the actual opening angle of the damper; the preset positional relationship includes the preset distance between the damper and the air outlet setting area, and the preset opening angle of the damper. The detection module includes a distance judgment unit, which is used to determine whether the actual distance is less than a preset distance; An angle determination unit is used to determine whether the actual angle is equal to the preset angle after determining that the actual distance is less than the preset distance. The second foreign object presence determination unit is used to determine that there is a foreign object between the damper and the body when the actual angle is equal to the preset angle.

6. A range hood, characterized in that, This includes the body, dampers, rotating shaft, information acquisition device, and controller; The body includes an air vent area, and one side of the damper is rotatably connected to the body via the rotating shaft. When the damper is in the closed state, the damper blocks the air vent area. The information acquisition device is used to acquire the actual positional relationship information between the damper and the machine body, and send the actual positional relationship information to the controller; The controller is used to execute the control method of the range hood according to any one of claims 1 to 4.

7. The range hood according to claim 6, characterized in that, The information acquisition device includes: a ranging sensor; The ranging sensor is used to obtain the actual distance between the damper and the machine body, and sends the actual distance to the controller; Alternatively, the information acquisition device may further include: an angle sensor; The angle sensor is used to obtain the actual opening angle of the damper and send the actual angle to the controller.

8. The range hood according to claim 7, characterized in that, Also includes: Infrared sensor; The infrared sensor is used to acquire the infrared sensing signal of the foreign object and send the infrared sensing signal to the controller.

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