A range hood and a damper control method and device thereof

Abstract

The application discloses an extractor hood and a damper control method and device thereof. The extractor hood comprises a machine body and a damper. The machine body comprises a push rod motor and a rotating arm. The push rod motor drives the damper to open or close through the rotating arm. The method comprises the following steps: in the process of controlling the damper to close, the actual opening angle of the damper and the actual operating current of the push rod motor are acquired in real time; the dangerous existence condition of the damper in the closing process is determined according to the actual opening angle and / or the actual operating current; when it is determined that the damper is dangerous in the closing process, the closing process of the damper is controlled to stop. The damper can be controlled to stop the closing process in time when it is determined that the dangerous condition exists, so that the user can be prevented from being pinched by the damper in the closing process and thus a safety accident is avoided, and the use safety of the extractor hood is effectively improved.

Description

Technical Field

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

[0002] Currently, range hoods control the opening and closing of the damper by setting a limit switch. That is, the limit switch on the right side of the machine is used. When the up button is pressed, the push rod motor rotates forward and the damper rises and opens. Conversely, when the up button is pressed, the push rod motor rotates forward and the damper falls and closes.

[0003] Using a single limit switch to control the opening and closing of the damper cannot guarantee safety during the opening and closing process, especially during the closing process. This can easily lead to the risk of pinching hands and cannot provide users with a good sense of operational safety and a safe experience. Summary of the Invention

[0004] This invention provides a range hood and its damper control method and device to improve the safety of using the range hood.

[0005] According to one aspect of the present invention, a method for controlling the damper of a range hood is provided. The range hood includes a body and a damper. The body includes a push rod motor and a rotating arm. The push rod motor drives the damper to open or close via the rotating arm. The method includes:

[0006] During the process of controlling the damper to close, the actual opening angle of the damper and the actual operating current of the push rod motor are obtained in real time.

[0007] Determine the potential hazards of the damper during the closing process based on the actual opening angle and / or actual operating current.

[0008] If it is determined that there is a danger during the closing process of the damper, control the damper to stop the closing process.

[0009] Optionally, based on the actual opening angle, determine the potential hazards present during the closing process of the damper, including:

[0010] Determine if the actual opening angle is greater than 0°;

[0011] If so, obtain the first duration of the damper being at its current actual opening angle;

[0012] Determine whether the first duration exceeds the first preset time;

[0013] If so, then the closing process of the damper is definitely dangerous.

[0014] Optionally, after determining whether the actual opening angle is greater than 0°, the following steps are also included:

[0015] Determine whether the actual opening angle is less than or equal to the preset opening angle;

[0016] If so, then execute the step of obtaining the first duration of the damper at its current actual opening angle;

[0017] If not, then it is determined that there is no danger during the closing process of the damper;

[0018] The control damper continues to close.

[0019] Optionally, based on the actual operating current, determine the potential hazards present during the damper's closing process, including:

[0020] Determine whether the actual operating current is within the stall current range;

[0021] If so, then obtain the second duration during which the actual operating current is within the stall current range;

[0022] Determine whether the second duration exceeds the second preset time;

[0023] If so, then the closing process of the damper is definitely dangerous.

[0024] Optionally, based on the actual opening angle and the actual operating current of the push rod motor, determine the potential hazards during the closing process of the damper, including:

[0025] Determine whether the actual opening angle is greater than 0° and whether the actual operating current is within the stall current range;

[0026] If it is determined that the actual opening angle is greater than 0° and the actual operating current is within the range of stall current, then the first duration of the damper being at the current actual opening angle and the second duration of the actual operating current being within the range of stall current are obtained.

[0027] Determine whether the first duration exceeds the first preset time and whether the second duration exceeds the second preset time;

[0028] If it is determined that the first duration exceeds the first preset time and the second duration exceeds the second preset time, then it is determined that the closing process of the damper is dangerous.

[0029] Optionally, before controlling the damper to stop the closing process, the following may also be included:

[0030] Acquire the hand detection signal between the damper and the machine body;

[0031] Determine if there is a risk of pinching a hand based on the hand detection signal;

[0032] If so, then control the damper to stop the closing process.

[0033] Optionally, the damper control method for the range hood also includes:

[0034] Once it is determined that there is no danger during the closing process of the damper, the damper is controlled to continue the closing process, and the steps of acquiring the actual opening angle of the damper and the actual operating current of the push rod motor in real time are executed during the closing process.

[0035] The damper stops closing when the actual opening angle is 0° and / or when the actual operating current is within the preset operating current range for more than a third preset time.

[0036] According to another aspect of the present invention, a damper control device for a range hood is provided. The range hood includes a body and a damper. The body includes a push rod motor and a rotating arm. When the push rod motor drives the damper to open or close via the rotating arm, the device includes:

[0037] The information acquisition module is used to acquire the actual opening angle of the damper and the operating current of the push rod motor in real time during the control of the damper closing process;

[0038] The hazard presence determination module is used to determine the presence of hazards during the closing process of the damper based on the actual opening angle and / or operating current.

[0039] The damper control module is used to stop the damper from closing when it is determined that there is a danger during the closing process.

[0040] According to another aspect of the present invention, a range hood is provided, comprising a body, an air damper, an angle sensor, a current collector, and a controller;

[0041] The machine body includes a push rod motor and a rotating arm. When the push rod motor drives the damper to open or close via the rotating arm;

[0042] Angle sensors are used to obtain the actual opening angle of the damper and send the actual opening angle to the controller;

[0043] The current acquisition unit is used to obtain the actual operating current of the push rod motor and send the actual operating current to the controller;

[0044] The controller is used to execute the control method of the range hood described above.

[0045] Optionally, the range hood may also include: a hand signal acquisition device;

[0046] The hand signal acquisition device is used to acquire the hand detection signal between the damper and the machine body, and send the hand detection signal to the controller.

[0047] In the embodiment of the present invention, during the optional damper closing process, the actual opening angle of the damper and the actual operating current of the push rod motor are acquired in real time. Based on the actual opening angle and the actual operating current, the damper is detected to detect whether there is a dangerous situation during the closing process. Thus, when a dangerous situation is determined, the damper can be controlled to stop the closing process in time, which can prevent users from getting their hands caught in the damper during the closing process and thus prevent safety accidents. This effectively improves the safety of using the range hood.

[0048] 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

[0049] 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.

[0050] Figure 1 This is a schematic diagram of the structure of a range hood provided in an embodiment of the present invention;

[0051] Figure 2 This is a schematic diagram of another range hood provided in an embodiment of the present invention;

[0052] Figure 3 This is a flowchart of a damper control method for a range hood provided in an embodiment of the present invention;

[0053] Figure 4 This is a flowchart of another method for controlling the damper of a range hood provided in an embodiment of the present invention;

[0054] Figure 5 This is a flowchart of another method for controlling the damper of a range hood provided in an embodiment of the present invention;

[0055] Figure 6 This is a flowchart of another method for controlling the damper of a range hood provided in an embodiment of the present invention;

[0056] Figure 7 This is a flowchart of another method for controlling the damper of a range hood provided in an embodiment of the present invention;

[0057] Figure 8 This is a schematic diagram of the structure of a damper control device for a range hood provided in an embodiment of the present invention;

[0058] Figure 9 This is a structural block diagram of a range hood provided in an embodiment of the invention;

[0059] Figure 10 This is a structural block diagram of another range hood provided in the embodiments of the invention. Detailed Implementation

[0060] 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.

[0061] 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.

[0062] This invention provides a method for controlling the damper of a range hood, which can effectively prevent dangerous situations from occurring during the closing process of the damper. This method for controlling the damper of a range hood can be executed by the damper control device of the range hood provided in this invention. The damper control device of the range hood can be implemented in the form of software and / or hardware, and the damper control device of the range hood can be configured in the controller of the range hood.

[0063] 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 and an air damper 2. The body 1 includes a push rod motor 3 and a rotating arm 4. The push rod motor 3 drives the air damper 2 to open or close through the rotating arm 4.

[0064] Specifically, the main body 1 includes an air vent area 11, which has an air inlet. When the range hood is running, the damper 2 is in the position as follows: Figure 1When the range hood is in the open state as shown, and the fan inside rotates, it draws cooking fumes from the air inlet into the main body 1 and then exhausts them into the exhaust duct. One side of the damper 2 is rotatably connected to the main body 1 via a rotating shaft 5. When the damper 2 is in the open state... Figure 2 When closed, as shown, the angle between the damper 2 and the body 1 is 0°, effectively blocking the air vent area 11. The push rod motor 3 and the rotating arm 4 are fixedly connected via a fixed shaft 6. When the push rod of the push rod motor 3 extends, it drives the rotating arm 4 to rotate clockwise, thereby causing the damper 2 to rotate clockwise along the rotating shaft 5. This causes the side of the damper 2 away from the rotating shaft 5 to gradually approach the body 1 until the opening angle α of the damper 2 is 0°, i.e., the angle α between the damper 2, the rotating shaft 5, and the side of the body 1 where the air vent area 11 is located is 0°. At this point, the damper 2 is in the position shown... Figure 2 The closed state is shown. When the push rod of the push rod motor 3 retracts, it drives the rotating arm 4 to rotate counterclockwise, thereby driving the damper 2 to rotate counterclockwise along the rotating shaft 5. This causes the side of the damper 2 away from the rotating shaft 5 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.

[0065] Figure 3 A flowchart of a damper 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:

[0066] S110. During the process of controlling the damper to close, the actual opening angle of the damper and the actual operating current of the push rod motor are obtained in real time.

[0067] Specifically, when controlling the range hood to stop running, it is usually necessary to simultaneously control the damper 2 to close so that the damper 2 can block the air inlet located in the air vent area 11, which can prevent oil fumes and foreign objects in the exhaust pipe from entering the room through the air inlet when the range hood is not running. During the closing process of the damper 2, the opening angle α of the damper 2 gradually decreases, making the distance between the side of the damper 2 away from the rotating shaft 5 and the body increasingly smaller. During this process, if a person accidentally swings their hand between the damper 2 and the body 1, there is a risk of hand being pinched. If a person's hand is pinched between the damper 2 and the body 1, the opening angle α of the damper 2 stops decreasing. Since the opening and closing of the damper is driven by the extension and retraction of the push rod in the push rod motor 3, and the motor in the push rod motor 3 has operating current when it rotates, the push rod motor 3 may become stuck when a person's hand is pinched between the damper 2 and the body 1. Based on this, the actual opening angle of the damper and the actual operating current of the push rod motor can be obtained in real time during the closing process of the damper 2.

[0068] S120. Determine the potential hazards of the damper during the closing process based on the actual opening angle and / or actual operating current.

[0069] Specifically, the ability of a damper to close properly can be detected by measuring the rate of change of its actual opening angle during the closing process. If the rate of change of the actual opening angle is not zero within a certain time period, it indicates that the damper cannot close properly, posing a danger. Alternatively, the size of the actual opening angle can also be used to detect whether the damper can close properly. For example, if the actual opening angle of the damper is 0° within a preset time, it indicates that the damper has closed successfully and there is no danger. However, if the opening angle is not 0° within the preset time, there may be a danger. Another method is to detect whether the damper can close properly based on the actual operating current of the push rod motor. Furthermore, the actual opening angle of the damper and the actual operating current of the push rod motor can be combined to detect whether the damper can close properly, thus detecting whether there is a danger during the closing process.

[0070] S130. If it is determined that there is a danger during the closing process of the damper, control the damper to stop the closing process.

[0071] Specifically, when it is determined that there is a danger during the closing of the damper, that is, when it is determined that the damper may pinch a hand during the closing process, the push rod motor can be controlled to stop rotating or to reverse, so as to increase the opening of the damper. This is to avoid the push rod motor continuously rotating forward, causing the opening angle of the damper to continue to decrease, which would cause the hand to be squeezed. This can effectively prevent the occurrence of safety accidents.

[0072] The range hood damper control method provided in this invention acquires the actual opening angle of the damper and the actual operating current of the push rod motor in real time during the optional damper closing process. Based on the actual opening angle and actual operating current, it detects whether there is a dangerous situation during the damper closing process. Therefore, when a dangerous situation is determined, it can control the damper to stop the closing process in time, which can prevent users from getting their hands caught in the damper during the closing process and thus prevent safety accidents. This effectively improves the safety of using the range hood.

[0073] Optional, Figure 4 This is a flowchart of another method for controlling the damper of a range hood provided in an embodiment of the present invention, as shown below. Figure 4 As shown, the damper control methods for range hoods include:

[0074] S210. During the process of controlling the damper to close, the actual opening angle of the damper and the actual operating current of the push rod motor are obtained in real time.

[0075] S220. Determine whether the actual opening angle is greater than 0°; if yes, proceed to step S230; if no, proceed to S260.

[0076] S230, Obtain the first duration of the damper being at its current actual opening angle.

[0077] S240. Determine whether the first duration exceeds the first preset time; if yes, proceed to step S250; if no, proceed to step S270.

[0078] S250, It is determined that there is a danger in the closing process of the damper.

[0079] S260, Control the damper to stop the closing process.

[0080] Specifically, during the closing process of damper 2, the opening angle 'a' of damper 2 gradually decreases until the damper is fully closed, at which point the opening angle 'a' of damper 2 is 0. Therefore, the actual opening angle of the damper can be obtained in real time during the closing process. If the actual opening angle is greater than 0°, it indicates that the damper is not fully closed. At this point, the first duration of the damper at the current actual opening angle can be obtained. If the damper remains at an opening angle greater than 0° for a long time, it indicates that an object or hand may be blocking the damper, posing a risk of pinching a hand. In this case, the closing process of the damper can be stopped.

[0081] For example, to further improve the accuracy of detection, after determining that the current actual opening angle of the damper is greater than 0°, it can be further determined whether the actual opening angle is less than or equal to the preset opening angle; if yes, the step of obtaining the first duration of the damper at the current actual opening angle is executed; if no, it is determined that there is no danger in the closing process of the damper; and the damper is controlled to continue the closing process.

[0082] Specifically, an angle sensor can be used to collect the opening angle of the damper. In practical applications, the angle sensor may malfunction. Therefore, to improve the accuracy of the detection, after determining that the actual opening angle of the damper is greater than 0°, it can be further checked whether the actual opening angle is greater than a preset angle. The preset angle can be the maximum angle the damper can open to based on the operating setting before the range hood stops running. If the actual opening angle is greater than the preset angle, it indicates that the angle sensor is malfunctioning. In this case, the angle signal collected by the angle sensor is unreliable, so it can be determined that there is no danger during the closing process of the damper. The damper can be controlled to continue closing until the closing process exceeds a preset time, at which point the damper can be stopped. This preset time can be the time required for the opening angle of the damper to decrease from the preset angle to 0°. Alternatively, after determining that the angle sensor is malfunctioning, the actual operating current of the push rod motor can be used to detect dangerous situations during the damper closing process, thereby achieving control of the damper.

[0083] S270. Ensure that there is no danger during the closing process of the damper.

[0084] S280, Control the damper to continue closing and execute step S210.

[0085] Specifically, if the first duration of the damper at the current opening angle does not exceed the first preset time, it indicates that the opening angle of the damper is gradually decreasing and is not blocked by objects or hands. At this time, the damper can be controlled to continue the closing process, and the actual opening angle and the actual operating current limit of the push rod motor during the closing process can be continuously acquired to continue to detect dangerous situations during the closing process of the damper based on the angle, until the damper is completely closed and the detection stops.

[0086] Optional, Figure 5 This is a flowchart of another method for controlling the damper of a range hood provided in an embodiment of the present invention, as shown below. Figure 5 As shown, the damper control methods for range hoods include:

[0087] S310. During the process of controlling the damper to close, the actual opening angle of the damper and the actual operating current of the push rod motor are obtained in real time.

[0088] S320. Determine whether the operating current is within the stall current range; if yes, proceed to step S330; if no, proceed to step S370.

[0089] Specifically, when controlling the damper to close, the motor in the push rod motor rotates, causing the push rod to extend, thereby controlling the damper's closure. The push rod motor has an operating current (i.e., working current) during operation. If the extension or retraction of the push rod is not obstructed, the actual operating current of the push rod is within the preset operating current range. However, if the push rod is obstructed during extension or retraction—that is, the motor rotates but the push rod cannot extend or retract according to the motor's rotation direction—the motor stalls, and the actual operating current of the push rod motor is within the stall current range. Therefore, it can be determined first that the actual operating current of the push rod motor is within the stall current range. If so, it is possible that an object or a person is obstructing the damper from closing, preventing the push rod from extending.

[0090] S330, obtain the second duration during which the actual operating current is within the stall current range.

[0091] S340. Determine whether the second duration exceeds the second preset time; if yes, proceed to step S350; if no, return to step S310.

[0092] S350. It is determined that there is a danger in the closing process of the damper.

[0093] S360, controls the damper to stop the closing process.

[0094] Specifically, if the actual operating current of the push rod motor is determined to be within the stall current range, a second duration during which the actual operating current is within the stall current range is acquired. It is then determined whether this second duration exceeds a second preset time, i.e., whether the stall time of the push rod motor exceeds the second preset time. If the stall time exceeds the second preset time, it indicates that an object or person's hand is trapped between the damper and the machine body and cannot be removed independently, posing a risk of hand injury. In this case, the damper can be stopped from closing. If the stall time does not exceed the second preset time, it indicates that the danger has been eliminated. In this case, it is not necessary to control the damper's closing process. The actual opening angle of the damper and the actual operating current of the push rod motor can continue to be acquired in real time to continue detecting potential dangers during the damper's closing process based on the actual operating current of the push rod motor, until the damper is completely closed and the detection stops.

[0095] S370. Determine whether the actual operating current exceeds the third preset time within the preset operating current range; if yes, proceed to step S360; if no, return to step S310.

[0096] Specifically, the third preset time can be the time required for the damper's opening angle to decrease from a preset angle to 0° when the actual operating current of the push rod motor is within the preset operating current range. If the actual operating current is within the preset operating current range and exceeds the third preset time, it indicates that the damper can be completely closed, and the damper can be controlled to stop the closing process.

[0097] Optional, Figure 6 This is a flowchart of another method for controlling the damper of a range hood provided in an embodiment of the present invention, as shown below. Figure 6 As shown, the damper control methods for range hoods include:

[0098] S410. During the process of controlling the damper to close, the actual opening angle of the damper and the actual operating current of the push rod motor are obtained in real time.

[0099] S420: Determine whether the actual opening angle is greater than 0° and whether the actual operating current is within the stall current range; if so, execute S430.

[0100] S430: Obtain the first duration during which the damper is at its current actual opening angle, and obtain the second duration during which the actual operating current is within the range of the stall current.

[0101] S440. Determine whether the first duration exceeds the first preset time and whether the second duration exceeds the second preset time; if so, execute S450.

[0102] S450. It has been determined that there is a danger in the closing process of the damper.

[0103] S460, Control the damper to stop the closing process.

[0104] Specifically, the system can simultaneously detect dangerous situations during the damper closing process based on the actual opening angle of the damper and the actual operating current of the push rod motor. If the damper remains at an opening angle greater than 0° for more than a first preset time, and the actual operating current of the push rod motor remains at a stalled position for more than a second preset time during this period, it indicates that an object or hand is trapped between the damper and the machine body. In this case, the push rod motor should be stopped or reversed immediately to stop the damper closing process. If the above conditions are not met, i.e., if at least one of the following four conditions is met: the actual opening angle of the damper is equal to 0° or greater than the preset angle; the first duration of the damper's opening angle at the current actual opening angle does not exceed the first preset time; the actual operating current of the push rod motor is not within the stalled current range; or the second duration of the actual operating current within the stalled current range does not exceed the second preset time, it indicates that there is no danger of being trapped, and the damper closing process can continue until a danger is determined to occur during the damper closing process or the damper is determined to be completely closed, at which point the damper closing process can be stopped.

[0105] Optional, Figure 7 This is a flowchart of another method for controlling the damper of a range hood provided in an embodiment of the present invention, as shown below. Figure 7 As shown, the damper control methods for range hoods include:

[0106] S510. During the process of controlling the damper to close, the actual opening angle of the damper and the actual operating current of the push rod motor are obtained in real time.

[0107] S520. Determine the potential hazards of the damper during the closing process based on the actual opening angle and / or actual operating current.

[0108] S530. When it is determined that there is a danger during the closing process of the damper, a hand detection signal between the damper and the machine body is acquired.

[0109] S540: Determine whether there is a risk of pinching a hand based on the hand detection signal; if so, proceed to S550.

[0110] S550, controls the damper to stop the closing process.

[0111] Specifically, to improve the accuracy of hand safety detection, a hand detection signal can be acquired between the damper and the machine body when an object or hand is identified as being trapped between them. This hand detection signal can be an infrared sensor signal and / or an ultrasonic signal. This allows the system to determine whether the object trapped between the damper and the machine body is an object or a hand. If a hand is identified, the damper's closing process is stopped to prevent further injury. If an object is identified, an alarm signal can be issued simultaneously with the damper's closure to notify the user for timely intervention.

[0112] In this embodiment of the invention, when it is determined that an object or a human hand is sandwiched between the damper and the body, a human hand detection signal is further obtained. Based on the human hand detection signal, it is determined whether there is a human hand between the damper and the body. When it is determined that there is a human hand, the damper is controlled to stop the closing process, so as to prevent further damage to the human hand and to prevent the damper closing process from stopping frequently, thereby improving the user's experience of using the range hood.

[0113] Based on the same inventive concept, embodiments of the present invention provide a damper control device for a range hood. This damper control device is used to execute the damper control method for a range hood provided in any embodiment of the present invention. The damper control device can be implemented by software and / or hardware. Therefore, the damper control device for a range hood provided in the embodiments of the present invention includes the technical features of the damper control method for a range hood provided in any embodiment of the present invention, and can achieve the beneficial effects of the damper control method for a range hood provided in any embodiment of the present invention. Similarities can be referred to the above description of the damper control method for a range hood provided in the embodiments of the present invention, and will not be repeated here.

[0114] refer to Figure 1 or Figure 2 The range hood includes a body 1 and an air damper 2. The body 1 includes a push rod motor 3 and a rotating arm 4. The push rod motor 3 drives the air damper 2 to open or close through the rotating arm 4. Figure 8 This is a schematic diagram of the structure of a damper 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 8 The range hood's damper control device includes an information acquisition module 100, used to acquire the actual opening angle of the damper and the operating current of the push rod motor in real time during the damper closing process; a hazard existence determination module 200, used to determine the hazard existence of the damper during the closing process based on the actual opening angle and / or operating current; and a damper control module 300, used to control the damper to stop the closing process when it is determined that there is a hazard during the closing process.

[0115] The damper control device for the range hood provided in this embodiment of the invention can promptly control the damper to stop closing when a dangerous situation is detected, thus preventing users from getting their hands caught in the damper during the closing process and causing safety accidents, and effectively improving the safety of using the range hood.

[0116] Optionally, the hazard existence determination module includes a first angle judgment unit for determining whether the actual opening angle is greater than 0°; a first time acquisition unit for acquiring the first duration of the damper at the current actual opening angle when the first angle judgment unit determines that the actual opening angle is greater than 0°; a first time judgment unit for determining whether the first duration exceeds a first preset time; and a first hazard existence determination unit for determining that the closing process of the damper is dangerous when the first time judgment unit determines that the first duration exceeds the first preset time.

[0117] Optionally, the hazard existence determination module further includes a second angle judgment unit, used to determine whether the actual opening angle is less than or equal to a preset opening angle after the first angle judgment unit determines that the actual opening angle is greater than 0°; the first time acquisition unit is also used to acquire the first duration of the damper being at the current actual opening angle when the second angle judgment unit determines whether the actual opening angle is less than or equal to the preset opening angle; the first hazard existence determination unit is also used to determine that there is no hazard during the closing process of the damper when the second angle judgment unit determines that the actual opening angle is greater than the preset opening angle. The damper control module is also used to control the damper to continue the closing process when the first hazard existence determination unit determines that there is no hazard during the closing process of the damper.

[0118] Optionally, the hazard existence determination module includes: a current judgment unit for judging whether the actual operating current is within the locked rotor current range; a second time acquisition unit for acquiring a second duration during which the actual operating current is within the locked rotor current range when the current judgment unit determines that the actual operating current is within the locked rotor current range; a second time judgment unit for judging whether the second duration exceeds a second preset time; and a second hazard existence determination unit for determining that there is a hazard in the closing process of the damper when the second time judgment unit determines that the second duration exceeds the second preset time.

[0119] Optionally, the hazard existence determination module includes: an angle and current judgment unit, used to determine whether the actual opening angle is greater than 0° and whether the actual operating current is within the stall current range; a third time judgment unit, used to obtain a first duration of the damper at the current actual opening angle and a second duration of the actual operating current within the stall current range when the angle and current judgment unit determines that the actual opening angle is greater than 0° and the actual operating current is within the stall current range; a third time judgment unit, used to determine whether the first duration exceeds a first preset time and whether the second duration exceeds a second preset time; and a third hazard existence judgment unit, used to determine that there is a hazard in the damper closing process when the third time judgment unit determines that the first duration exceeds the first preset time and the second duration exceeds the second preset time.

[0120] Optionally, the range hood's damper control device also includes: a hand detection signal acquisition module, used to acquire a hand detection signal between the damper and the machine body before the damper control module controls the damper to stop closing; a hand-pinch hazard judgment module, used to determine whether there is a hand-pinch hazard based on the hand detection signal; the damper control module is also used to control the damper to stop closing when the hand-pinch hazard judgment module determines that there is a hand-pinch hazard based on the hand detection signal.

[0121] Optionally, the damper control module is also used to control the damper to continue closing when it is determined that there is no danger during the closing process. The damper control module is also used to control the damper to stop closing when the actual opening angle is 0° and / or the actual operating current is within a preset operating current range for more than a third preset time.

[0122] Based on the same inventive concept, this invention also provides a range hood. Figure 9 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 9The range hood includes a body 1, an air damper 2, an angle sensor 7, a current collector 8, and a controller 9. The body 1 includes a push rod motor 3 and a rotating arm 4. The push rod motor 3 drives the air damper 2 to open or close via the rotating arm 4. The angle sensor 7 is used to obtain the actual opening angle of the air damper 2 and send the actual opening angle to the controller 9. The current collector 8 is used to obtain the actual operating current of the push rod motor 3 and send the actual operating current to the controller 9. The controller 9 is used to execute the air damper 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 air damper control method of the range hood provided in any embodiment of the present invention, and can achieve the beneficial effects of the air damper control method of the range hood provided in any embodiment of the present invention. The similarities can be referred to the above description of the air damper control method of the range hood provided in the embodiments of the present invention, and will not be repeated here.

[0123] The angle sensor 7 can be mounted on the drive shaft 5. When the damper 2 opens, it drives the angle sensor 7 to rotate, thereby enabling the measurement of the damper's opening angle. The current acquisition device 8 can be a Hall current sensor or a current acquisition circuit.

[0124] Optional, Figure 10 This is a structural block diagram of another range hood provided in the embodiments of the invention, in conjunction with reference to the reference. Figure 1 , Figure 2 and Figure 10 The range hood also includes a hand signal acquisition device 10; the hand signal acquisition device 10 is used to acquire the hand detection signal between the air damper and the machine body, and send the hand detection signal to the controller 9.

[0125] Specifically, the hand signal acquisition device 10 may include an infrared sensor or an ultrasonic sensor. The infrared sensor can detect the infrared sensing signal between the damper and the machine body, and the ultrasonic sensor can detect the ultrasonic signal between the damper and the machine body. The infrared sensing signal or the ultrasonic signal can be used to determine whether a hand is being held between the damper and the machine body. In another feasible embodiment of the invention, the hand signal acquisition device 10 may include both an infrared sensor and an ultrasonic sensor. The infrared sensor and the ultrasonic sensor can be mounted on the damper to improve the accuracy of hand detection.

[0126] 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.

[0127] 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 method for controlling the damper of a range hood, the range hood comprising a body and a damper, the body including a push rod motor and a rotating arm, the push rod motor driving the damper to open or close via the rotating arm, characterized in that, include: During the process of controlling the damper to close, the actual opening angle of the damper and the actual operating current of the push rod motor are acquired in real time. Based on the actual opening angle and / or the actual operating current, determine the potential dangers of the damper during the closing process; If it is determined that there is a danger during the closing process of the damper, the closing process of the damper shall be stopped. The determination of the potential danger of the damper during the closing process, based on the actual opening angle, includes: Determine whether the actual opening angle is greater than 0°; If so, obtain the first duration during which the damper is at the current actual opening angle; Determine whether the first duration exceeds the first preset time; If so, then the closing process of the damper is deemed dangerous.

2. The damper control method for a range hood according to claim 1, characterized in that, After determining whether the actual opening angle is greater than 0°, the process also includes: Determine whether the actual opening angle is less than or equal to the preset opening angle; If so, then execute the step of obtaining the first duration of the damper being at the current actual opening angle; If not, then it is determined that there is no danger during the closing process of the damper; Control the damper to continue closing.

3. The damper control method for a range hood according to claim 1, characterized in that, Based on the actual operating current, determine the potential hazards of the damper during the closing process, including: Determine whether the actual operating current is within the stall current range; If so, then obtain the second duration during which the actual operating current is within the range of the stall current; Determine whether the second duration exceeds the second preset time; If so, then the closing process of the damper is deemed dangerous.

4. The damper control method for a range hood according to claim 1, characterized in that, Based on the actual opening angle and the actual operating current of the push rod motor, determine the potential hazards of the damper during the closing process, including: Determine whether the actual opening angle is greater than 0° and whether the actual operating current is within the stall current range; If it is determined that the actual opening angle is greater than 0° and the actual operating current is within the range of stall current, then the first duration of the damper being at the current actual opening angle is obtained, and the second duration of the actual operating current being within the range of stall current is obtained. Determine whether the first duration exceeds a first preset time and whether the second duration exceeds a second preset time; If it is determined that the first duration exceeds the first preset time and the second duration exceeds the second preset time, then it is determined that the closing process of the damper is dangerous.

5. The damper control method for a range hood according to claim 1, characterized in that, Before controlling the damper to stop the closing process, the following is also included: Acquire the hand detection signal between the damper and the machine body; The presence of a hand-pinching hazard is determined based on the hand detection signal. If so, then control the damper to stop the closing process.

6. The damper control method for a range hood according to claim 1, characterized in that, Also includes: When it is determined that there is no danger during the closing process of the damper, the damper is controlled to continue the closing process, and the steps of acquiring the actual opening angle of the damper and the actual operating current of the push rod motor in real time are executed during the closing process of the damper. The damper is controlled to stop closing when the actual opening angle is equal to 0° and / or when the actual operating current is within the preset operating current range for more than a third preset time.

7. A damper control device for a range hood, the range hood comprising a body and a damper, the body including a push rod motor and a rotating arm, wherein the push rod motor drives the damper to open or close via the rotating arm, characterized in that, include: The information acquisition module is used to acquire the actual opening angle of the damper and the actual operating current of the push rod motor in real time during the process of controlling the damper to close. The hazard existence determination module is used to determine the hazard existence of the damper during the closing process based on the actual opening angle and / or the actual operating current. The damper control module is used to control the damper to stop the closing process when it is determined that there is a danger during the closing process. The danger existence determination module includes a first angle judgment unit for judging whether the actual opening angle is greater than 0°; and a first time acquisition unit for acquiring the first duration of the damper being at the current actual opening angle when the first angle judgment unit determines whether the actual opening angle is greater than 0°. The first time judgment unit is used to determine whether the first duration exceeds the first preset time; the first danger existence determination unit is used to determine that there is a danger in the closing process of the damper when the first time judgment unit determines whether the first duration exceeds the first preset time.

8. A range hood, characterized in that, Includes the body, damper, angle sensor, current acquisition unit, and controller; The machine body includes a push rod motor and a rotating arm, and the push rod motor drives the damper to open or close through the rotating arm; The angle sensor is used to obtain the actual opening angle of the damper and send the actual opening angle to the controller; The current acquisition device is used to obtain the actual operating current of the push rod motor and send the actual operating current to the controller; The controller is used to execute the damper control method of the range hood according to any one of claims 1 to 6.

9. The range hood according to claim 8, characterized in that, Also includes: Human hand signal acquisition device; The hand signal acquisition device is used to acquire the hand detection signal between the damper and the machine body, and send the hand detection signal to the controller.

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