A range hood anti-pinch reminding method and device, a range hood, and a medium

Abstract

This invention relates to a method, device, range hood, and storage medium for providing an anti-pinch reminder for a range hood. The range hood includes a telescopic mechanism. The method includes: before the telescopic mechanism retracts, obtaining the current extension distance of the telescopic mechanism; if the current extension distance is less than or equal to a preset distance, reminding the user to prevent pinching at that moment; if the current extension distance is greater than the preset distance, obtaining a target reminder time based on the current extension distance, the preset distance, and a predetermined retraction speed, and reminding the user to prevent pinching at the target reminder time. This invention not only saves costs but also ensures the accuracy and effectiveness of the anti-pinch reminder, thereby improving the user experience.

Description

Technical Field

[0001] This invention relates to the field of household appliance technology, and in particular to a method, device, range hood, and medium for preventing hand pinching in a range hood. Background Technology

[0002] A submersible range hood is a type of kitchen fume extraction device installed below the kitchen ceiling. It typically consists of a motor, exhaust duct, grease filter, and control panel. The submersible range hood uses the motor to generate negative pressure, effectively venting grease and fumes into the enclosed space, preventing them from polluting the kitchen air. It also effectively removes grease, odors, and moisture, keeping the kitchen air fresh.

[0003] Currently, downdraft range hoods typically include an anti-pinch warning function. Some systems alert the user after a set time when the telescopic mechanism retracts to a fixed position, while others use limit switches or ultrasonic sensors to monitor the telescopic mechanism's position in real time to determine if it has retracted to the preset anti-pinch warning position. However, all these solutions have their own shortcomings. The limit switch solution is difficult to install in a suitable location, resulting in low feasibility.

[0004] The solution of controlling the telescopic mechanism using ultrasonic sensors requires the ultrasonic sensors to monitor in real time whether the telescopic mechanism has retracted to the preset anti-pinch warning position. However, prolonged use of ultrasonic sensors will increase additional power costs and reduce sensor lifespan. The solution of controlling the telescopic mechanism to retract at a fixed time is affected by factors such as the speed of the drive motor and the position of the telescopic mechanism at the start of retraction. The faster the drive motor speed, the farther the retraction distance is than expected, and the slower the drive motor speed, the shorter the retraction distance is than expected, resulting in a large deviation between the actual anti-pinch warning position and the preset position. In addition, if the telescopic mechanism starts to retract but is not fully extended, it may be fully retracted before the preset anti-pinch warning time has elapsed, without triggering the anti-pinch warning, thus affecting the user experience. Summary of the Invention

[0005] One of the technical problems solved by this invention is to provide a method for preventing hand pinching in range hoods, which does not require real-time monitoring of whether the telescopic mechanism retracts to the preset anti-pinch reminder position. This not only saves costs but also ensures the accuracy and effectiveness of the anti-pinch reminder, thereby improving the user experience.

[0006] The second technical problem solved by this invention is to provide a range hood anti-pinch reminder device that does not require real-time monitoring of whether the telescopic mechanism retracts to the preset anti-pinch reminder position. This not only saves costs but also ensures the accuracy and effectiveness of the anti-pinch reminder, thereby improving the user experience.

[0007] The third technical problem solved by this invention is to provide a range hood that does not require real-time monitoring of whether the telescopic mechanism retracts to the preset anti-pinch reminder position. This not only saves costs but also ensures the accuracy and effectiveness of the anti-pinch reminder, thereby improving the user experience.

[0008] The fourth technical problem solved by this invention is to provide a storage medium that does not require real-time monitoring of whether the telescopic mechanism retracts to the preset anti-pinch reminder position. This not only saves costs but also ensures the accuracy and effectiveness of the anti-pinch reminder, thereby improving the user experience.

[0009] The first technical problem mentioned above is solved by the following technical solution:

[0010] A method for preventing hand pinching in a range hood, the range hood including a telescopic mechanism, the method comprising:

[0011] Before the telescopic mechanism retracts, the current extension distance of the telescopic mechanism is obtained;

[0012] If the current extension distance of the telescopic mechanism is less than or equal to the preset distance, the user will be alerted at that moment to prevent hand pinching.

[0013] If the current extension distance of the telescopic mechanism is greater than the preset distance, a target reminder time is obtained based on the current extension distance, the preset distance, and the predetermined retraction speed, and the user is reminded to prevent hand pinching at the target reminder time.

[0014] The anti-pinch reminder method for range hoods described in this invention involves first obtaining the current extension distance of the telescopic mechanism before its retraction. If the current extension distance is less than or equal to a preset distance, the user is reminded to prevent pinching at that moment. If the current extension distance is greater than the preset distance, a target reminder time is calculated based on the current extension distance, the preset distance, and a predetermined retraction speed, and the user is reminded to prevent pinching at the target reminder time. In other words, this application can calculate and determine the reminder time of the telescopic mechanism based on its current extension distance and the preset distance before retraction, thereby providing timely reminders to the user to prevent pinching. Existing submersible range hoods require ultrasonic sensors to monitor in real time whether the telescopic mechanism retracts to a preset anti-pinch warning position. Prolonged use of ultrasonic sensors increases power costs and reduces sensor lifespan. Methods that control the retraction time of the telescopic mechanism are affected by factors such as the drive motor speed and the initial position of the mechanism. A faster drive motor results in a longer retraction distance than expected, while a slower motor results in a shorter retraction distance, causing a significant deviation between the actual anti-pinch warning position and the preset position. Therefore, the anti-pinch warning method for range hoods proposed in this application does not require real-time monitoring of the telescopic mechanism's retraction to the preset position. This not only saves costs but also ensures the accuracy and effectiveness of the anti-pinch warning, thereby improving the user experience.

[0015] The second technical problem mentioned above is solved by the following technical solution:

[0016] A range hood anti-pinch reminder device, wherein the range hood includes a telescopic mechanism, and the device includes: an acquisition module and a reminder module; wherein...

[0017] The acquisition module is used to acquire the current extension distance of the telescopic mechanism before the telescopic mechanism retracts;

[0018] The reminder module is used to remind the user to prevent hand pinching if the current extension distance of the telescopic mechanism is less than or equal to a preset distance; if the current extension distance of the telescopic mechanism is greater than the preset distance, a target reminder time is obtained based on the current extension distance, the preset distance, and a predetermined retraction speed, and the user is reminded to prevent hand pinching at the target reminder time.

[0019] The anti-pinch reminder device for range hoods described in this invention obtains the current extension distance of the telescopic mechanism before retraction via an acquisition module. If the current extension distance is less than or equal to a preset distance, the reminder module alerts the user to prevent pinching at that moment. If the current extension distance is greater than the preset distance, the reminder module calculates a target reminder time based on the current extension distance, the preset distance, and a predetermined retraction speed, and alerts the user to prevent pinching at the target reminder time. In other words, this application can calculate and determine the reminder time of the telescopic mechanism based on its current extension distance and the preset distance before retraction, thereby providing timely reminders to the user to prevent pinching. Existing submersible range hoods require ultrasonic sensors to monitor in real time whether the telescopic mechanism retracts to a preset anti-pinch warning position. Prolonged use of ultrasonic sensors increases power costs and reduces sensor lifespan. Schemes that control the telescopic mechanism's retraction time are affected by factors such as the drive motor's speed and the mechanism's initial position. A faster motor speed results in a longer retraction distance than expected, while a slower motor speed results in a shorter retraction distance, causing a significant deviation between the actual anti-pinch warning position and the preset position. Therefore, the anti-pinch warning device for range hoods proposed in this application does not require real-time monitoring of the telescopic mechanism's retraction to the preset position. This not only saves costs but also ensures the accuracy and effectiveness of the anti-pinch warning, thereby improving the user experience.

[0020] The third technical problem mentioned above is solved by the following technical solution:

[0021] A range hood, characterized in that it comprises:

[0022] One or more processors;

[0023] Memory, used to store one or more programs.

[0024] When the one or more programs are executed by the one or more processors, the one or more processors implement the above-described method for preventing finger pinching in range hoods.

[0025] The range hood of this invention implements the anti-pinch reminder method described above. Before the telescopic mechanism retracts, the current extension distance of the telescopic mechanism is obtained. If the current extension distance is less than or equal to a preset distance, the user is reminded to prevent pinching at that moment. If the current extension distance of the telescopic mechanism is greater than the preset distance, a target reminder time is obtained based on the current extension distance, the preset distance, and a predetermined retraction speed, and the user is reminded to prevent pinching at the target reminder time. In other words, this application can calculate and determine the reminder time of the telescopic mechanism based on the current extension distance and the preset distance before the telescopic mechanism retracts, thereby timely reminding the user to prevent pinching. Existing submersible range hoods require ultrasonic sensors to monitor in real time whether the telescopic mechanism retracts to a preset anti-pinch warning position. Prolonged use of ultrasonic sensors increases power costs and reduces sensor lifespan. The method of controlling the telescopic mechanism's retraction time is affected by factors such as the drive motor's speed and the mechanism's initial position. A faster motor speed results in a longer retraction distance than expected, while a slower motor speed results in a shorter retraction distance, causing a significant deviation between the actual anti-pinch warning position and the preset position. Therefore, the range hood proposed in this application does not require real-time monitoring of the telescopic mechanism's retraction to the preset anti-pinch warning position. This not only saves costs but also ensures the accuracy and effectiveness of the anti-pinch warning, thereby improving the user experience.

[0026] The fourth technical problem mentioned above is solved by the following technical solution:

[0027] A storage medium storing a computer program that, when executed by a processor, implements the above-described method for preventing finger pinching in a range hood.

[0028] The storage medium of this invention implements the aforementioned method for preventing finger pinching in range hoods. Before the telescopic mechanism retracts, the current extension distance of the telescopic mechanism is obtained. If the current extension distance is less than or equal to a preset distance, the user is reminded to prevent finger pinching at that moment. If the current extension distance is greater than the preset distance, a target reminder time is obtained based on the current extension distance, the preset distance, and a predetermined retraction speed, and the user is reminded to prevent finger pinching at the target reminder time. In other words, this application can calculate and determine the reminder time of the telescopic mechanism based on its current extension distance and the preset distance before retraction, thereby providing timely reminders to the user to prevent finger pinching. Existing submersible range hoods require ultrasonic sensors to monitor in real time whether the telescopic mechanism retracts to a preset anti-pinch warning position. Prolonged use of ultrasonic sensors increases power costs and reduces sensor lifespan. Schemes that control the telescopic mechanism's retraction time are affected by factors such as the drive motor's speed and the mechanism's initial position. A faster motor speed results in a longer retraction distance than expected, while a slower motor speed results in a shorter retraction distance, causing a significant deviation between the actual anti-pinch warning position and the preset position. Therefore, the storage medium proposed in this application does not require real-time monitoring of the telescopic mechanism's retraction to the preset anti-pinch warning position. This not only saves costs but also ensures the accuracy and effectiveness of the anti-pinch warning, thereby improving the user experience. Attached Figure Description

[0029] 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.

[0030] Figure 1 A flowchart illustrating the anti-pinch reminder method for a range hood provided in this application embodiment;

[0031] Figure 2 This is a schematic diagram of the telescopic mechanism in the first position provided in an embodiment of this application;

[0032] Figure 3 This is a schematic diagram of the telescopic mechanism in the second position provided in an embodiment of this application;

[0033] Figure 4 This is a schematic diagram of the telescopic mechanism provided in the embodiment of this application at the anti-pinch reminder position;

[0034] Figure 5 A flowchart illustrating an anti-pinch reminder method for a range hood provided in another embodiment of this application;

[0035] Figure 6 A flowchart illustrating a method for preventing hand pinching in a range hood, as provided in another embodiment of this application;

[0036] Figure 7 A flowchart illustrating an anti-pinch reminder method for a range hood provided in another embodiment of this application;

[0037] Figure 8 A schematic flowchart illustrating the method for updating the extension speed provided in an embodiment of this application;

[0038] Figure 9 A flowchart illustrating the method for updating the retraction speed provided in an embodiment of this application;

[0039] Figure 10 This is a schematic diagram of the anti-pinch reminder device for range hoods provided in the embodiments of this application;

[0040] Figure 11 This is a schematic diagram of the structure of the range hood provided in the embodiment of this application. Detailed Implementation

[0041] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0042] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0043] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0044] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0045] Example 1

[0046] Figure 1 This is a flowchart illustrating the anti-pinch reminder method for range hoods provided in this application embodiment. This method can be executed by the anti-pinch reminder device or the range hood itself. Figure 1 As shown, the method for preventing hand pinching on a range hood may include the following steps:

[0047] S101. Before the telescopic mechanism retracts, obtain the current extension distance of the telescopic mechanism.

[0048] In this step, before the telescopic mechanism retracts, the range hood can obtain the current extension distance of the telescopic mechanism. Specifically, the current extension distance of the telescopic mechanism can be: a first extension distance obtained by recording the extension time of the telescopic mechanism when it extends and based on the extension time and a predetermined extension speed; or a preset maximum extension distance of the telescopic mechanism; or a second extension distance obtained by recording the cumulative extension time of the telescopic mechanism when it extends and the cumulative retraction time of the telescopic mechanism when it retracts, based on the cumulative extension time, the predetermined extension speed, the cumulative retraction time, and the predetermined retraction speed.

[0049] In one embodiment, before the telescopic mechanism retracts, the current extension distance of the telescopic mechanism can be obtained by a sensor. Specifically, the distance measurement method using a sensor can include: 1) Ultrasonic ranging: An ultrasonic sensor emits ultrasonic pulses. When the ultrasonic waves encounter an obstacle and are reflected back, the sensor receives the returned ultrasonic signal and calculates the distance based on the time difference between transmission and reception. 2) Infrared ranging: An infrared sensor emits an infrared beam. When the beam encounters an obstacle and is reflected back, the sensor receives the returned infrared light signal and calculates the distance based on the light intensity. 3) Laser ranging: A laser sensor measures distance by emitting a laser beam and receiving the reflected light. 4) Time difference ranging: This method is mainly for wireless communication technology. The sensor calculates the distance based on the time difference between transmitting and receiving signals. Common applications include radar and GPS. Since the sensor in this embodiment does not need to monitor in real time whether the telescopic mechanism retracts to the preset anti-pinch warning position, the power cost of the sensor can be effectively saved.

[0050] In one embodiment, the current extension distance of the telescopic mechanism is: a first extension distance obtained by recording the extension time of the telescopic mechanism when it extends and based on the extension time and a predetermined extension speed; or a preset maximum extension distance of the telescopic mechanism; or a second extension distance obtained by recording the cumulative extension time of the telescopic mechanism when it extends and the cumulative retraction time of the telescopic mechanism when it retracts, based on the cumulative extension time, the predetermined extension speed, the cumulative retraction time, and the predetermined retraction speed. In this embodiment, it is not necessary to use a sensor to measure the distance, which not only saves on power costs but also directly eliminates the cost of electronic components.

[0051] In specific embodiments of this application, relevant parameters can be preset, including: 1) Assuming the position of the telescopic mechanism when it is not extended is the first position, and the position after the telescopic mechanism extends a preset maximum extension distance is the second position; the preset maximum extension distance of the telescopic mechanism is S, that is, the distance between the first position and the second position is S. 2) The distance between the current extension position of the telescopic mechanism and the preset anti-pinch reminder position is L. 3) The preset extension speed is V1, that is, the average speed of the telescopic mechanism from the first position to the second position is V1. 4) The preset retraction speed is V2, that is, the average speed of the telescopic mechanism from the second position to the first position is V2. 5) The time taken for the telescopic mechanism to extend the preset maximum extension distance is t1. 6) The time taken for the telescopic mechanism to retract from the second position to the first position is t2. 7) The time taken for the telescopic mechanism to extend from the first position to the current extension position is t3; wherein, the current extension position is any position between the first position and the second position. 8) The distance between the first position and the current extended position is L1. 9) The target reminder time is t4, that is, the time it takes for the telescopic mechanism to retract from the current extended position to the anti-pinch reminder position is t4.

[0052] Figure 2 This is a schematic diagram of the telescopic mechanism provided in an embodiment of this application in a first position. Figure 2 As shown, the telescopic mechanism is in the first position before it extends.

[0053] Figure 3 This is a schematic diagram of the telescopic mechanism provided in an embodiment of this application in a second position. Figure 2 As shown, the distance between the first position and the second position is S.

[0054] Figure 4 This is a structural diagram of the telescopic mechanism provided in an embodiment of this application at the anti-pinch warning position. Figure 4 As shown, the distance between the first position and the anti-pinch reminder position is preset to L.

[0055] During the process of the telescopic mechanism extending from the first position to the current extended position, the range hood can record the extension distance L1 = V1 × t3 in real time; where V1 is the predetermined extension speed; and t3 is the time taken for the telescopic mechanism to extend from the first position to the current extended position. When the range hood detects that the drive motor is stalled, it indicates that the telescopic mechanism has extended to the second position. At this time, time t1 equals time t3, and the extension distance L1 equals S. At this time, the actual extension speed V'1 = S / t1 of the telescopic mechanism can be calculated based on the distance S between the first and second positions and the time t1 taken for the telescopic mechanism to extend from the first position to the second position; and the actual extension speed V'1 is set as the predetermined extension speed V1. Specifically, the range hood can determine whether the telescopic mechanism has extended to the second position or retracted to the first position by judging whether the drive motor has stalled. Further, the range hood can judge whether the motor has stalled by the following methods: 1) Judging by abnormal noise: When the drive motor stalls, it will usually emit abnormal noise. 1) **Judging by the motor's behavior:** If the drive motor suddenly emits a loud noise during normal operation, it indicates that the drive motor is stalled. 2) **Judging by the rotation:** If the drive motor cannot rotate or rotates with abnormal difficulty, it indicates that the drive motor is stalled. 3) **Judging by the current:** Use an ammeter or multimeter to measure the drive motor's current. If the drive motor's current exceeds the normal current range, it indicates that the drive motor is stalled. 4) **Judging by the temperature:** When the drive motor is stalled, it will generate excessively high temperatures due to insufficient heat dissipation. If the drive motor's temperature exceeds the normal temperature range, it indicates that the drive motor is stalled.

[0056] S102. Determine whether the current extension distance of the telescopic mechanism is less than or equal to the preset distance; if yes, execute S103; otherwise, execute S104.

[0057] In this step, the range hood can determine in real time whether the current extension distance of the telescopic mechanism is less than or equal to the preset distance; if the current extension distance of the telescopic mechanism is less than or equal to the preset distance, then execute S103; if the current extension distance of the telescopic mechanism is greater than the preset distance, then execute S104.

[0058] In one embodiment, the current extension distance of the telescopic mechanism is: when the telescopic mechanism extends, the range hood can record the extension time of the telescopic mechanism, and then obtain the first extension distance based on the extension time and a predetermined extension speed. Specifically, the range hood can multiply the time t3 taken for the telescopic mechanism to extend from the first position to the current extension position by the predetermined extension speed V1 to obtain the distance L1 between the first position and the current extension position.

[0059] In one embodiment, the current extension distance of the telescopic mechanism is: the preset maximum extension distance of the telescopic mechanism.

[0060] In one embodiment, the current extension distance of the telescopic mechanism is: when the telescopic mechanism extends, the cumulative extension time is recorded; when the telescopic mechanism retracts, the cumulative retraction time is recorded; and a second extension distance is obtained based on the cumulative extension time, a predetermined extension speed, the cumulative retraction time, and a predetermined retraction speed. Specifically, the range hood can first multiply the cumulative extension time by the predetermined extension speed to obtain the cumulative extension distance of the telescopic mechanism; then multiply the cumulative retraction time by the predetermined retraction speed to obtain the cumulative retraction distance of the telescopic mechanism; and finally subtract the cumulative retraction distance from the cumulative extension distance to obtain the second extension distance.

[0061] S103. Remind the user to avoid pinching their hand at any given time.

[0062] In this step, the range hood can remind the user to avoid pinching their hand at any given moment. In one embodiment, the range hood can stop the telescopic mechanism for several seconds and simultaneously emit several warning sounds via a buzzer. In another embodiment, the preset distance can be set to a relatively large value. The range hood does not stop the telescopic mechanism but only emits several warning sounds via a buzzer. Since the range hood has already warned the user in advance, the user will not get their hand pinched.

[0063] S104. Based on the current extension distance, preset distance, and predetermined retraction speed, obtain the target reminder time, and remind the user to prevent pinching their hand at the target reminder time.

[0064] In this step, the range hood can determine the target reminder time based on the current extension distance, the preset distance, and the predetermined retraction speed, and then remind the user to avoid pinching their hand at the target reminder time. Specifically, the range hood can first subtract the preset distance from the current extension distance to obtain the distance between the current extension position of the telescopic mechanism and the predetermined anti-pinch reminder position; then, it can divide the distance between the current extension position of the telescopic mechanism and the predetermined anti-pinch reminder position by the predetermined retraction speed to obtain the target reminder time.

[0065] The anti-pinch reminder method for range hoods proposed in this application involves obtaining the current extension distance of the telescopic mechanism before its retraction. If the current extension distance is less than or equal to a preset distance, the user is reminded to prevent pinching at that moment. If the current extension distance is greater than the preset distance, a target reminder time is calculated based on the current extension distance, the preset distance, and a predetermined retraction speed, and the user is reminded to prevent pinching at the target reminder time. In other words, this application can calculate and determine the reminder time of the telescopic mechanism based on its current extension distance and the preset distance before retraction, thereby providing timely reminders to the user to prevent pinching. Existing submersible range hoods require ultrasonic sensors to monitor in real time whether the telescopic mechanism retracts to the preset anti-pinch warning position. However, prolonged use of ultrasonic sensors increases power costs and reduces sensor lifespan. Schemes that control the telescopic mechanism's retraction time are affected by factors such as the drive motor's speed and the mechanism's initial position. A faster motor speed results in a longer retraction distance than expected, while a slower motor speed results in a shorter retraction distance, causing a significant deviation between the actual anti-pinch warning position and the preset position. Therefore, this application's embodiment uses a sensor-based distance measurement scheme, eliminating the need for real-time monitoring of the telescopic mechanism's retraction to the preset anti-pinch warning position, thus effectively saving on sensor power costs. This sensor-free distance measurement scheme not only saves on power costs but also directly eliminates the cost of electronic components. Furthermore, it ensures the accuracy and effectiveness of the anti-pinch warning, thereby improving the user experience.

[0066] Example 2

[0067] Figure 5 This is a flowchart illustrating a method for preventing hand pinching in a range hood, provided as another embodiment of this application. Further optimizations and extensions are possible based on the above technical solution, and it can be combined with the various optional implementation methods described above. For example... Figure 5 As shown, the method for preventing hand pinching on a range hood may include the following steps:

[0068] S501. Before the telescopic mechanism retracts, obtain the current extension distance of the telescopic mechanism; wherein, the current extension distance of the telescopic mechanism is: when the telescopic mechanism extends, record the extension time of the telescopic mechanism, and obtain the first extension distance based on the extension time and a predetermined extension speed.

[0069] In this step, before the telescopic mechanism retracts, the range hood can obtain the current extension distance of the telescopic mechanism. When the telescopic mechanism extends, the range hood can record the extension time, and then obtain the first extension distance based on the extension time and a predetermined extension speed. Specifically, the range hood can multiply the extension time by the predetermined extension speed to obtain the first extension distance.

[0070] S502. Determine whether the current extension distance of the telescopic mechanism is less than or equal to the preset distance; if yes, execute S503; otherwise, execute S504.

[0071] S503, reminds users to avoid pinching their hands at any time.

[0072] S504. Based on the current extension distance, preset distance, and predetermined retraction speed, the target reminder time is obtained, and the user is reminded to prevent hand pinching at the target reminder time.

[0073] In this step, the range hood can determine the target reminder time based on the current extension distance, the preset distance, and the predetermined retraction speed, and then remind the user to avoid pinching their hand at the target reminder time. Specifically, the range hood can first subtract the preset distance from the current extension distance to obtain the distance between the current extension position of the telescopic mechanism and the predetermined anti-pinch reminder position; then, it can divide the distance between the current extension position of the telescopic mechanism and the predetermined anti-pinch reminder position by the predetermined retraction speed to obtain the target reminder time. Specifically, the range hood can calculate the target reminder time according to the following formula: t4=(L1-L) / V2; where t4 is the target reminder time; L1 is the current extension distance, i.e., the distance between the first position and the current extension position; L is the preset distance, i.e., the distance between the first position and the anti-pinch reminder position; and V2 is the predetermined retraction speed, i.e., the average speed at which the telescopic mechanism retracts from the second position to the first position.

[0074] In specific embodiments of this application, the application scenarios of the range hood can include both initial power-on and non-initial power-on. When the range hood is powered on for the first time, the telescopic mechanism can be controlled to retract first; then it can be determined whether the telescopic mechanism has retracted to the first position within a predetermined time period. Specifically, the range hood can determine whether the telescopic mechanism has retracted to the first position by whether the drive motor stalls. If the range hood detects that the drive motor has stalled within the predetermined time period, it is considered that the telescopic mechanism has retracted to the first position; if the range hood does not detect that the drive motor has stalled within the predetermined time period, the range hood can remind the user to avoid pinching their hand at that moment, and at the same time control the telescopic mechanism to stop retracting for a period of time; then control the telescopic mechanism to continue retracting until the telescopic mechanism retracts to the first position.

[0075] The anti-pinch reminder method for range hoods proposed in this application involves obtaining the current extension distance of the telescopic mechanism before its retraction. If the current extension distance is less than or equal to a preset distance, the user is reminded to prevent pinching at that moment. If the current extension distance is greater than the preset distance, a target reminder time is calculated based on the current extension distance, the preset distance, and a predetermined retraction speed, and the user is reminded to prevent pinching at the target reminder time. In other words, this application can calculate and determine the reminder time of the telescopic mechanism based on its current extension distance and the preset distance before retraction, thereby providing timely reminders to the user to prevent pinching. Existing submersible range hoods require ultrasonic sensors to monitor in real time whether the telescopic mechanism retracts to the preset anti-pinch warning position. However, prolonged use of ultrasonic sensors increases power costs and reduces sensor lifespan. Schemes that control the telescopic mechanism's retraction time are affected by factors such as the drive motor's speed and the mechanism's initial position. A faster motor speed results in a longer retraction distance than expected, while a slower motor speed results in a shorter retraction distance, causing a significant deviation between the actual anti-pinch warning position and the preset position. Therefore, this application's embodiment uses a sensor-based distance measurement scheme, eliminating the need for real-time monitoring of the telescopic mechanism's retraction to the preset anti-pinch warning position, thus effectively saving on sensor power costs. This sensor-free distance measurement scheme not only saves on power costs but also directly eliminates the cost of electronic components. Furthermore, it ensures the accuracy and effectiveness of the anti-pinch warning, thereby improving the user experience.

[0076] Example 3

[0077] Figure 6 This is a flowchart illustrating a method for preventing hand pinching in a range hood, provided in another embodiment of this application. Further optimizations and extensions are possible based on the above technical solution, and it can be combined with the various optional implementation methods described above. For example... Figure 6 As shown, the method for preventing hand pinching on a range hood may include the following steps:

[0078] S601. Before the telescopic mechanism retracts, obtain the current extension distance of the telescopic mechanism; wherein, the current extension distance of the telescopic mechanism is: the preset maximum extension distance of the telescopic mechanism.

[0079] In a specific embodiment of this application, the current extension distance of the telescopic mechanism can be a preset maximum extension distance, that is, the distance between the first position and the second position.

[0080] S602. Determine whether the current extension distance of the telescopic mechanism is less than or equal to the preset distance; if yes, execute S603; otherwise, execute S604.

[0081] S603, reminds the user to avoid pinching their hand at any time.

[0082] S604. Based on the current extension distance, preset distance, and predetermined retraction speed, the target reminder time is obtained, and the user is reminded to prevent pinching at the target reminder time.

[0083] The anti-pinch reminder method for range hoods proposed in this application involves obtaining the current extension distance of the telescopic mechanism before its retraction. If the current extension distance is less than or equal to a preset distance, the user is reminded to prevent pinching at that moment. If the current extension distance is greater than the preset distance, a target reminder time is calculated based on the current extension distance, the preset distance, and a predetermined retraction speed, and the user is reminded to prevent pinching at the target reminder time. In other words, this application can calculate and determine the reminder time of the telescopic mechanism based on its current extension distance and the preset distance before retraction, thereby providing timely reminders to the user to prevent pinching. Existing submersible range hoods require ultrasonic sensors to monitor in real time whether the telescopic mechanism retracts to the preset anti-pinch warning position. However, prolonged use of ultrasonic sensors increases power costs and reduces sensor lifespan. Schemes that control the telescopic mechanism's retraction time are affected by factors such as the drive motor's speed and the mechanism's initial position. A faster motor speed results in a longer retraction distance than expected, while a slower motor speed results in a shorter retraction distance, causing a significant deviation between the actual anti-pinch warning position and the preset position. Therefore, this application's embodiment uses a sensor-based distance measurement scheme, eliminating the need for real-time monitoring of the telescopic mechanism's retraction to the preset anti-pinch warning position, thus effectively saving on sensor power costs. This sensor-free distance measurement scheme not only saves on power costs but also directly eliminates the cost of electronic components. Furthermore, it ensures the accuracy and effectiveness of the anti-pinch warning, thereby improving the user experience.

[0084] Example 4

[0085] Figure 7 This is a flowchart illustrating a method for preventing hand pinching in a range hood, as provided in another embodiment of this application. Further optimizations and extensions are possible based on the above technical solution, and it can be combined with the various optional implementation methods described above. For example... Figure 7 As shown, the method for preventing hand pinching on a range hood may include the following steps:

[0086] S701. Before the telescopic mechanism retracts, obtain the current extension distance of the telescopic mechanism; wherein, the current extension distance of the telescopic mechanism is: when the telescopic mechanism extends, record the cumulative extension time of the telescopic mechanism; when the telescopic mechanism retracts, record the cumulative retraction time of the telescopic mechanism; and obtain the second extension distance based on the cumulative extension time, the predetermined extension speed, the cumulative retraction time, and the predetermined retraction speed.

[0087] In this step, before the telescopic mechanism retracts, the range hood can obtain the current extension distance of the telescopic mechanism. When the telescopic mechanism extends, the range hood can record the cumulative extension time; when the telescopic mechanism retracts, the range hood can record the cumulative retraction time. Then, based on the cumulative extension time, a predetermined extension speed, the cumulative retraction time, and a predetermined retraction speed, a second extension distance is obtained. Specifically, the range hood can first multiply the cumulative extension time by the predetermined extension speed to obtain the cumulative extension distance; then multiply the cumulative retraction time by the predetermined retraction speed to obtain the cumulative retraction distance; and finally subtract the cumulative retraction distance from the cumulative extension distance to obtain the second extension distance.

[0088] S702. Determine whether the current extension distance of the telescopic mechanism is less than or equal to the preset distance; if yes, execute S703; otherwise, execute S704.

[0089] S703 reminds users to avoid pinching their hands at any time.

[0090] S704. Based on the current extension distance, preset distance, and predetermined retraction speed, the target reminder time is obtained, and the user is reminded to prevent pinching at the target reminder time.

[0091] In this step, the range hood can determine the target reminder time based on the current extension distance, the preset distance, and the predetermined retraction speed, and then remind the user to avoid pinching their hand at the target reminder time. Specifically, the range hood can first subtract the preset distance from the current extension distance to obtain the distance between the current extension position of the telescopic mechanism and the predetermined anti-pinch reminder position; then, it can divide the distance between the current extension position and the predetermined anti-pinch reminder position by the predetermined retraction speed to obtain the target reminder time. If the time taken for the telescopic mechanism to retract from the current extension position to the new extension position is equal to the target reminder time, it indicates that the telescopic mechanism has retracted to the anti-pinch reminder position at the current moment; if the time taken for the telescopic mechanism to retract from the current extension position to the new extension position is less than the target reminder time, it indicates that the telescopic mechanism has not yet retracted to the anti-pinch reminder position at the current moment. In this case, the time taken for the telescopic mechanism to retract from the current extension position to the new extension position can be obtained again until the time taken for the telescopic mechanism to retract from the current extension position to the new extension position is equal to the target reminder time.

[0092] The anti-pinch reminder method for range hoods proposed in this application involves obtaining the current extension distance of the telescopic mechanism before its retraction. If the current extension distance is less than or equal to a preset distance, the user is reminded to prevent pinching at that moment. If the current extension distance is greater than the preset distance, a target reminder time is calculated based on the current extension distance, the preset distance, and a predetermined retraction speed, and the user is reminded to prevent pinching at the target reminder time. In other words, this application can calculate and determine the reminder time of the telescopic mechanism based on its current extension distance and the preset distance before retraction, thereby providing timely reminders to the user to prevent pinching. Existing submersible range hoods require ultrasonic sensors to monitor in real time whether the telescopic mechanism retracts to the preset anti-pinch warning position. However, prolonged use of ultrasonic sensors increases power costs and reduces sensor lifespan. Schemes that control the telescopic mechanism's retraction time are affected by factors such as the drive motor's speed and the mechanism's initial position. A faster motor speed results in a longer retraction distance than expected, while a slower motor speed results in a shorter retraction distance, causing a significant deviation between the actual anti-pinch warning position and the preset position. Therefore, this application's embodiment uses a sensor-based distance measurement scheme, eliminating the need for real-time monitoring of the telescopic mechanism's retraction to the preset anti-pinch warning position, thus effectively saving on sensor power costs. This sensor-free distance measurement scheme not only saves on power costs but also directly eliminates the cost of electronic components. Furthermore, it ensures the accuracy and effectiveness of the anti-pinch warning, thereby improving the user experience.

[0093] Example 5

[0094] Figure 8 This is a flowchart illustrating the method for updating the extension speed provided in an embodiment of this application. Further optimizations and extensions can be made based on the above technical solution, and it can be combined with the various optional implementation methods described above. For example... Figure 6 As shown, the method for updating the extension speed may include the following steps:

[0095] S801. When the telescopic mechanism extends, record the extension time of the telescopic mechanism.

[0096] S802. If the telescopic mechanism extends from the first position to the second position, the actual extension speed of the telescopic mechanism is obtained according to the preset maximum extension distance and extension time, and the actual extension speed is set as the predetermined extension speed.

[0097] In this step, if the telescopic mechanism extends from the first position to the second position, the range hood can obtain the actual extension speed of the telescopic mechanism based on the preset maximum extension distance and extension time, and set the actual extension speed as a predetermined extension speed. Specifically, the range hood can divide the preset maximum extension distance by the extension time to obtain the actual extension speed of the telescopic mechanism.

[0098] In one embodiment, during the process of the telescopic mechanism extending from the first position to the second position, the range hood can determine whether the telescopic mechanism has extended to the second position by judging whether the drive motor has stalled. When the range hood detects that the drive motor has stalled, it indicates that the telescopic mechanism has extended to the second position. At this time, the range hood can obtain the actual extension speed of the telescopic mechanism based on the preset maximum extension distance and extension time, and set the actual extension speed as the predetermined extension speed.

[0099] Because range hoods are affected by factors such as aging and cooking fumes, the speed at which the telescopic mechanism extends from the first position to the second position may change. Therefore, after the telescopic mechanism extends from the first position to the second position, the range hood can calculate the actual extension speed of the telescopic mechanism from the first position to the second position, and then set the actual extension speed as a predetermined extension speed. This allows the range hood to save an extension speed that more closely approximates its actual operation, thus providing timely reminders to users to prevent finger pinching.

[0100] Example 6

[0101] Figure 9 This is a flowchart illustrating the method for updating the retraction speed provided in an embodiment of this application. Further optimizations and extensions can be made based on the above technical solution, and it can be combined with the various optional implementation methods described above. For example... Figure 9 As shown, the method for updating the retraction speed may include the following steps:

[0102] S901. When the telescopic mechanism retracts, record the retraction time of the telescopic mechanism.

[0103] S902. After the telescopic mechanism retracts, if the telescopic mechanism retracts from the second position to the first position, the actual retraction speed of the telescopic mechanism is obtained according to the preset maximum extension distance and retraction time, and the actual retraction speed is set as the predetermined retraction speed.

[0104] In this step, if the telescopic mechanism retracts from the second position to the first position, the range hood can obtain the actual retraction speed of the telescopic mechanism based on the preset maximum extension distance and retraction time, and set the actual retraction speed as a predetermined retraction speed. Specifically, the range hood can divide the preset maximum extension distance by the retraction time to obtain the actual retraction speed of the telescopic mechanism.

[0105] In one embodiment, during the retraction of the telescopic mechanism from the second position to the first position, the range hood can determine whether the telescopic mechanism has retracted to the first position by judging whether the drive motor has stalled. When the range hood detects that the drive motor has stalled, it indicates that the telescopic mechanism has retracted to the first position. At this time, the range hood can obtain the actual retraction speed of the telescopic mechanism based on the preset maximum extension distance and retraction time, and set the actual retraction speed as the predetermined retraction speed.

[0106] Because range hoods are affected by factors such as aging and cooking fumes, the speed at which the telescopic mechanism retracts from the second position to the first position may change. Therefore, after the telescopic mechanism retracts from the second position to the first position, the range hood can calculate the actual retraction speed and set this actual speed as a predetermined speed. This allows the range hood to save a retraction speed that more closely approximates its actual operation, thus providing timely reminders to users to prevent finger pinching.

[0107] Example 7

[0108] Figure 10 This is a schematic diagram of the anti-pinch reminder device for a range hood provided in an embodiment of this application. Figure 10 As shown, the range hood anti-pinch reminder device may include: an acquisition module 1001 and a reminder module 1002; wherein,

[0109] The acquisition module 1001 is used to acquire the current extension distance of the telescopic mechanism before the telescopic mechanism retracts;

[0110] The reminder module 1002 is used to remind the user to prevent hand pinching if the current extension distance of the telescopic mechanism is less than or equal to a preset distance; if the current extension distance of the telescopic mechanism is greater than the preset distance, a target reminder time is obtained based on the current extension distance, the preset distance and a predetermined retraction speed, and the user is reminded to prevent hand pinching at the target reminder time.

[0111] The aforementioned anti-pinch reminder device for range hoods can execute the method provided in any embodiment of this application, and possesses the corresponding functional modules and beneficial effects for executing the method. Technical details not described in detail in this embodiment can be found in the anti-pinch reminder method for range hoods provided in any embodiment of this application.

[0112] Example 8

[0113] Figure 11 This is a schematic diagram of the structure of the range hood provided in the embodiment of this application. Figure 11 A block diagram is shown that is suitable for implementing embodiments of the present application. Figure 11The range hood 12 shown is merely an example and should not impose any limitations on the functionality and scope of use of the embodiments of this application.

[0114] like Figure 11 As shown, the range hood 12 is represented in the form of a general-purpose computing device. The components of the range hood 12 may include, but are not limited to: one or more processors or processing units 16, system memory 28, and a bus 18 connecting different system components (including system memory 28 and processing unit 16).

[0115] Bus 18 represents one or more of several bus architectures, including a memory bus or memory controller, a peripheral bus, a graphics acceleration port, a processor, or a local bus using any of the various bus architectures. For example, these architectures include, but are not limited to, the Industry Standard Architecture (ISA) bus, the Micro Channel Architecture (MAC) bus, the Enhanced ISA bus, the Video Electronics Standards Association (VESA) local bus, and the Peripheral Component Interconnect (PCI) bus.

[0116] The range hood 12 typically includes a variety of computer-readable media. These media can be any available media that can be accessed by the range hood 12, including volatile and non-volatile media, movable and non-movable media.

[0117] System memory 28 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) 30 and / or cache memory 32. The range hood 12 may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, storage system 34 may be used to read and write non-removable, non-volatile magnetic media (…). Figure 11 Not shown; usually referred to as a "hard drive"). Although Figure 11 Not shown, a disk drive for reading and writing to a removable non-volatile disk (e.g., a "floppy disk") and an optical disk drive for reading and writing to a removable non-volatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical media) may be provided. In these cases, each drive may be connected to bus 18 via one or more data media interfaces. Memory 28 may include at least one program product having a set (e.g., at least one) of program modules configured to perform the functions of the embodiments of this application.

[0118] A program / utility 40 having a set (at least one) of program modules 42 may be stored, for example, in memory 28. Such program modules 42 include, but are not limited to, an operating system, one or more application programs, other program modules, and program data. Each or some combination of these examples may include an implementation of a network environment. Program modules 42 typically perform the functions and / or methods described in the embodiments of this application.

[0119] The range hood 12 can also communicate with one or more external devices 14 (e.g., keyboard, pointing device, display 24, etc.), and with one or more devices that enable a user to interact with the range hood 12, and / or with any device that enables the range hood 12 to communicate with one or more other computing devices (e.g., network card, modem, etc.). This communication can be performed via input / output (I / O) interface 22. Furthermore, the range hood 12 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public networks, such as the Internet) via network adapter 20. As shown, network adapter 20 communicates with other modules of the range hood 12 via bus 18. It should be understood that, although... Figure 11 As not shown, other hardware and / or software modules can be used in conjunction with the range hood 12, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0120] The processing unit 16 executes various functional applications and data processing by running programs stored in the system memory 28, such as implementing the anti-pinch reminder method for range hoods provided in the embodiments of this application.

[0121] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0122] The specific embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A method for preventing hand pinching in a range hood, wherein the range hood includes a telescopic mechanism, characterized in that: The method includes: Before the telescopic mechanism retracts, the current extension distance of the telescopic mechanism is obtained; If the current extension distance of the telescopic mechanism is less than or equal to the preset distance, the user will be alerted at that moment to prevent hand pinching. If the current extension distance of the telescopic mechanism is greater than the preset distance, the current extension distance is subtracted from the preset distance to obtain the distance between the current extension position of the telescopic mechanism and the predetermined anti-pinch reminder position; the distance between the current extension position of the telescopic mechanism and the predetermined anti-pinch reminder position is divided by the predetermined retraction speed to obtain the target reminder time, and the user is reminded to prevent pinching at the target reminder time; When the telescopic mechanism retracts, the retraction time of the telescopic mechanism is recorded; After the telescopic mechanism retracts, if the telescopic mechanism retracts from the second position to the first position, the actual retraction speed of the telescopic mechanism is obtained according to the preset maximum extension distance and the retraction time, and the actual retraction speed is set as the preset retraction speed.

2. The method according to claim 1, characterized in that: The current extension distance of the telescopic mechanism is: When the telescopic mechanism extends, the extension time of the telescopic mechanism is recorded, and a first extension distance is obtained based on the extension time and a predetermined extension speed; Or the preset maximum extension distance of the telescopic mechanism; Alternatively, when the telescopic mechanism extends, the cumulative extension time of the telescopic mechanism is recorded; when the telescopic mechanism retracts, the cumulative retraction time of the telescopic mechanism is recorded; and a second extension distance is obtained based on the cumulative extension time, a predetermined extension speed, the cumulative retraction time, and a predetermined retraction speed.

3. The method according to claim 2, characterized in that: The first extension distance, obtained based on the extension time and a predetermined extension speed, includes: The first extension distance is obtained by multiplying the extension time by the predetermined extension speed.

4. The method according to claim 2, characterized in that: The second extension distance, obtained based on the cumulative extension time, the predetermined extension speed, the cumulative retraction time, and the predetermined retraction speed, includes: Multiplying the cumulative extension time by the predetermined extension speed yields the cumulative extension distance of the telescopic mechanism; Multiply the cumulative retraction time by the predetermined retraction speed to obtain the cumulative retraction distance of the telescopic mechanism; The second extension distance is obtained by subtracting the cumulative retraction distance from the cumulative extension distance.

5. The method according to claim 2, characterized in that: Before the telescopic mechanism retracts, the method further includes: When the telescopic mechanism extends, the extension time of the telescopic mechanism is recorded; If the telescopic mechanism extends from the first position to the second position, the actual extension speed of the telescopic mechanism is obtained based on the preset maximum extension distance and the extension time, and the actual extension speed is set as the preset extension speed.

6. A hand-pinch prevention reminder device for a range hood, wherein the range hood includes a telescopic mechanism, characterized in that: The device includes: an acquisition module and an alert module; wherein... The acquisition module is used to acquire the current extension distance of the telescopic mechanism before the telescopic mechanism retracts; The reminder module is used to remind the user to prevent hand pinching if the current extension distance of the telescopic mechanism is less than or equal to a preset distance; if the current extension distance of the telescopic mechanism is greater than the preset distance, subtract the preset distance from the current extension distance to obtain the distance between the current extension position of the telescopic mechanism and a predetermined anti-pinch reminder position; divide the distance between the current extension position of the telescopic mechanism and the predetermined anti-pinch reminder position by a predetermined retraction speed to obtain a target reminder time, and remind the user to prevent hand pinching at the target reminder time; when the telescopic mechanism retracts, record the retraction time of the telescopic mechanism; after the telescopic mechanism retracts, if the telescopic mechanism retracts from the second position to the first position, obtain the actual retraction speed of the telescopic mechanism based on the preset maximum extension distance and the retraction time, and set the actual retraction speed as the predetermined retraction speed.

7. A range hood, characterized in that: include: One or more processors; Memory, used to store one or more programs. When the one or more programs are executed by the one or more processors, the one or more processors implement the range hood anti-pinch reminder method as described in any one of claims 1 to 5.

8. A storage medium having a computer program stored thereon, characterized in that: When the program is executed by the processor, it implements the anti-pinch reminder method for range hoods as described in any one of claims 1 to 5.

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