Range hood, control method and device thereof and storage medium

Abstract

The invention provides a range hood, a control method and device thereof and a storage medium, and the method comprises the following steps: in a preset environment scene, obtaining a preset target rotating speed and a current actual rotating speed of a first fan; determining a target rotating speed corresponding to the first fan at the current environment temperature based on a preset target rotating speed and the current actual rotating speed; the power of the first fan is controlled based on the target rotating speed, so that the current actual rotating speed is adjusted to the target rotating speed, the current actual rotating speed accurately follows the target rotating speed, the influence of environment temperature changes on the air volume of the range hood is counteracted, and the fans can keep stable air volume output at different environment temperatures; the working noise of the fan is kept in a comfortable range, the user experience is improved, meanwhile, the situation that flames are sucked into the range hood due to large air volume is avoided, and the safety performance of the range hood is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of range hood, and in particular to a range hood, a control method and device thereof and a storage medium. BACKGROUND

[0002] In the related art, the existing range hood mainly realizes different air volume control by controlling power and rotating speed. However, in the actual cooking process, due to the high heat generated by the cooktop during cooking, the ambient temperature rises, which affects the fan rotating speed, resulting in that the actual air volume of the range hood is obviously higher than the set air volume, thereby causing the working noise of the range hood to be relatively high. When the fire in the pot during cooking is higher, the actual air volume will be higher, and the flame will be sucked into the inside of the range hood. Long-term use of the range hood will cause the inside to be left with flammable oil stains, and even the range hood inside will catch fire. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art.

[0004] To this end, one object of the present application is to provide a control method for a range hood, which makes the current actual rotating speed accurately follow the target rotating speed, offsets the influence of ambient temperature change on the air volume of the range hood, makes the fan maintain stable air volume output under different ambient temperatures, keeps the working noise of the fan within a comfortable range, improves the user experience, and at the same time avoids the large air volume from sucking the flame into the inside of the range hood, thereby improving the safety performance of the range hood.

[0005] To this end, a second object of the present application is to provide a control device for a range hood.

[0006] To this end, a third object of the present application is to provide a range hood.

[0007] To this end, a fourth object of the present application is to provide a computer-readable storage medium.

[0008] In order to achieve the above-mentioned objects, an embodiment of the first aspect of the present application provides a control method for a range hood, the range hood comprising a first fan for discharging oil fume, the control method comprising: in a preset environment scene, obtaining a preset target rotating speed and a current actual rotating speed of the first fan, wherein the preset target rotating speed is a rotating speed of the first fan corresponding to a preset ambient temperature, and the current actual rotating speed is a rotating speed of the first fan corresponding to a current ambient temperature; determining a target rotating speed of the first fan corresponding to the current ambient temperature based on the preset target rotating speed and the current actual rotating speed; and controlling the power of the first fan based on the target rotating speed to adjust the current actual rotating speed to the target rotating speed.

[0009] According to the control method of the range hood of the present invention, under a preset environmental scenario, a preset target speed of the first fan when the ambient temperature is a preset ambient temperature and the current actual speed of the first fan when the ambient temperature is the current ambient temperature are obtained. Based on the speed difference between the preset target speed and the current actual speed, a target speed of the first fan corresponding to the current ambient temperature is determined. The power of the first fan is continuously adjusted based on the target speed, so that the current actual speed accurately follows the target speed, offsetting the influence of ambient temperature changes on the air volume of the range hood. This ensures that the fan can maintain a stable air volume output under different ambient temperatures, and the fan's operating noise is kept within a comfortable range, improving the user experience. At the same time, it avoids the large air volume from sucking flames into the range hood, improving the safety performance of the range hood.

[0010] In some embodiments, determining the target speed of the first fan at the current ambient temperature based on the preset target speed and the current actual speed includes: using the difference between the current actual speed and the preset target speed as a speed compensation factor; and using the difference between the preset target speed and the speed compensation factor as the target speed.

[0011] In some embodiments, the preset environment scenario includes: the target air volume of the first fan is a preset air volume, the back pressure of the first fan is a preset pressure, and the set power of the first fan is a preset power.

[0012] In some embodiments, the control method further includes: acquiring stove usage information; and controlling the power of the first fan based on the stove usage information and the current ambient temperature.

[0013] In some embodiments, controlling the power of the first fan based on stove usage information and the current ambient temperature includes: when it is determined based on stove usage information that a pot is placed on the stove and the current ambient temperature is greater than a first preset temperature threshold for a duration exceeding a first preset time, controlling the power of the first fan to not exceed a first power threshold; when it is determined based on stove usage information that a pot is placed on the stove and the current ambient temperature is greater than a second preset temperature threshold for a duration exceeding a second preset time, controlling the power of the first fan to not exceed a second power threshold; when it is determined based on stove usage information that a pot is placed on the stove and the current ambient temperature is greater than a third preset temperature threshold for a duration exceeding a third preset time, controlling the first fan to turn off and issuing an alarm indicating that the ambient temperature is too high, wherein the first preset temperature is less than the second preset temperature, the second preset temperature is less than the third preset temperature, the first preset power threshold is greater than the second preset power threshold, the first preset time is greater than the second preset time, and the second preset time is greater than the third preset time.

[0014] In some embodiments, when it is determined based on stove usage information that a pot is placed on the stove and the current ambient temperature is greater than a third set temperature threshold and the duration exceeds a third preset time, the method further includes: transmitting a preset control command to the stove for instructing it to turn off, so that the stove turns off in response to the preset control command.

[0015] In some embodiments, the range hood further includes a second fan for generating an air curtain to block the escape of cooking fumes, and the control method further includes: when the current ambient temperature is greater than a fourth preset temperature threshold and the duration exceeds a fourth preset time, controlling the rotation speed of the second fan to not exceed a first preset rotation speed threshold; when the current ambient temperature is greater than a fifth preset temperature threshold and the duration exceeds a fifth preset time, controlling the rotation speed of the second fan to not exceed a second preset rotation speed threshold; when the current ambient temperature is greater than a sixth preset temperature threshold and the duration exceeds a sixth preset time, controlling the rotation speed of the second fan to not exceed a third preset rotation speed threshold; wherein, the fourth preset temperature is less than the fifth preset temperature, the fifth preset temperature is less than the sixth preset temperature, the first preset rotation speed threshold is less than the second preset rotation speed threshold, the second preset rotation speed threshold is less than the third preset rotation speed threshold, the fourth preset time is greater than the fifth preset time, and the fifth preset time is greater than the sixth preset time.

[0016] To achieve the above objectives, a second aspect of the present invention provides a control device for a range hood. The range hood includes a first fan for exhausting fumes. The control device includes: an acquisition module, configured to acquire a preset target speed and a current actual speed of the first fan under a preset environmental scenario, wherein the preset target speed is the speed of the first fan when the ambient temperature is a preset ambient temperature, and the current actual speed is the speed of the first fan when the ambient temperature is the current ambient temperature; a determination module, configured to determine a target speed of the first fan at the current ambient temperature based on the preset target speed and the current actual speed; and an adjustment module, configured to control the power of the first fan based on the target speed to adjust the current actual speed to the target speed.

[0017] According to the control device of the range hood of the present invention, under a preset environmental scenario, the device acquires the preset target speed of the first fan when the ambient temperature is a preset ambient temperature and the current actual speed of the first fan when the ambient temperature is the current ambient temperature. Based on the speed difference between the preset target speed and the current actual speed, the device determines the target speed of the first fan at the current ambient temperature. Based on the target speed, the device continuously adjusts the power of the first fan so that the current actual speed accurately follows the target speed, thereby offsetting the impact of ambient temperature changes on the air volume of the range hood. This ensures that the fan can maintain a stable air volume output under different ambient temperatures, and the fan's operating noise remains within a comfortable range, improving the user experience. At the same time, it prevents the flame from being sucked into the range hood due to excessive air volume, thus improving the safety performance of the range hood.

[0018] To achieve the above objectives, a third aspect of the present invention provides a range hood, which includes a range hood body and a control device for the range hood described in the above embodiment.

[0019] According to an embodiment of the present invention, in a preset environmental scenario, the range hood obtains a preset target speed of the first fan when the ambient temperature is a preset ambient temperature and the current actual speed of the first fan when the ambient temperature is the current ambient temperature. Based on the speed difference between the preset target speed and the current actual speed, the target speed of the first fan at the current ambient temperature is determined. The power of the first fan is continuously adjusted based on the target speed, so that the current actual speed accurately follows the target speed, offsetting the impact of ambient temperature changes on the air volume of the range hood. This ensures that the fan can maintain a stable air volume output under different ambient temperatures, and the fan's operating noise remains within a comfortable range, improving the user experience. At the same time, it prevents the flame from being sucked into the range hood due to excessive air volume, improving the safety performance of the range hood.

[0020] To achieve the above objectives, a fourth aspect of the present invention provides a computer-readable storage medium storing a control program for a range hood, wherein the control program for the range hood, when executed by a processor, implements the control method for the range hood described above.

[0021] According to an embodiment of the present invention, when the control program of the range hood stored thereon is executed by a processor, it can determine the target speed of the first fan at the current ambient temperature by acquiring the preset target speed of the first fan when the ambient temperature is a preset ambient temperature and the current actual speed of the first fan when the ambient temperature is the current ambient temperature, based on the speed difference between the preset target speed and the current actual speed, and continuously adjust the power of the first fan based on the target speed, so that the current actual speed accurately follows the target speed, thereby offsetting the influence of ambient temperature changes on the air volume of the range hood, so that the fan can maintain a stable air volume output under different ambient temperatures, keep the operating noise of the fan within a comfortable range, improve the user experience, and at the same time avoid the large air volume from sucking the flame into the range hood, thereby improving the safety performance of the range hood.

[0022] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a structural block diagram of a range hood according to an embodiment of the present invention; Figure 2This is a flowchart of a control method for a range hood according to an embodiment of the present invention; Figure 3 This is a flowchart of a control method for a range hood according to a specific embodiment of the present invention; Figure 4 This is a structural block diagram of a control device for a range hood according to an embodiment of the present invention; Figure 5 This is a structural block diagram of a range hood according to an embodiment of the present invention. Detailed Implementation

[0024] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0025] Let's combine the following... Figure 1 This invention describes a range hood according to an embodiment of the present invention.

[0026] like Figure 1 As shown, the range hood of this embodiment includes: a temperature sensor module, a first fan control module, a first fan, a second fan control module, a second fan, a first wireless module, a second wireless module, and a main control module.

[0027] The temperature sensor module can be installed below the control panel of the range hood, away from the air inlet and the cooktop, to avoid the influence of grease and cooktop flames on the temperature sensor module. The temperature sensor module is used to collect the ambient temperature T within a preset area of ​​the range hood (including but not limited to the smoke collection area). i .

[0028] The first fan control module is connected to the first fan and drives and controls the working status of the first motor.

[0029] The first motor is used to exhaust cooking fumes.

[0030] The second fan control module is connected to the second fan and drives and controls the working status of the second fan.

[0031] The second fan is used to create an air curtain to prevent the oil fumes from escaping.

[0032] The first wireless module communicates wirelessly with the stove to achieve linkage between the range hood and the stove.

[0033] The second wireless module is wirelessly connected to the server to achieve data interaction. Through the second wireless module, the data of the range hood and stove can be reported to the server in real time.

[0034] The main control module is electrically connected to the above modules and is used to receive the operating parameters output by the above modules.

[0035] The following is combined Figures 1-3The present invention describes a control method for a range hood according to an embodiment of the present invention, wherein the range hood includes a first fan for exhausting fumes.

[0036] like Figure 2 As shown, the control method of the range hood in this embodiment of the invention includes at least steps S1-S3.

[0037] Step S1: Under a preset environmental scenario, obtain the preset target speed and the current actual speed of the first fan. The preset target speed is the speed of the first fan when the ambient temperature is the preset ambient temperature, and the current actual speed is the speed of the first fan when the ambient temperature is the current ambient temperature.

[0038] In this embodiment, under a preset environmental scenario, the temperature sensor module is used to collect the ambient temperature T in a preset area of ​​the range hood, including but not limited to the smoke collection area. i The temperature sensor module is electrically connected to the main control module, and it transmits the collected ambient temperature T. i The data is reported to the main control module, which then obtains the ambient temperature T. i Then, it is determined whether the ambient temperature is the preset ambient temperature. When the ambient temperature is the preset ambient temperature, the rotation speed of the first fan at this time is obtained and the rotation speed is determined as the preset target rotation speed R0 of the first fan.

[0039] The first motor control module can detect the current ambient temperature T during the operation of the first motor. i Current actual speed r i The first motor control module is electrically connected to the main control module, and it collects the current actual speed r. i The data is reported to the main control module to achieve two-way interaction of temperature sensing data.

[0040] Step S2: Determine the target speed of the first fan at the current ambient temperature based on the preset target speed and the current actual speed.

[0041] In this embodiment, a preset target speed R0 and the current actual speed r are determined. i Afterwards, due to the ambient temperature T i When it changes, it will cause the current actual speed r i The change occurs based on the preset target speed R0 and the current actual speed r. i The speed difference between the two values ​​is used to determine the target speed of the first fan at the current ambient temperature, thereby determining the dynamic target speed R. i Adaptive control is implemented for the first fan.

[0042] Step S3: Control the power of the first fan based on the target speed to adjust the current actual speed to the target speed.

[0043] In the embodiment, the target rotational speed R is determined. i Then, the current actual speed r i With the calculated target rotational speed R i By comparing the power output of the first fan and continuously adjusting its speed using an algorithm, the speed of the first fan is adjusted until the current actual speed r of the first fan is reached. i and target speed R i Consistency ensures that the range hood's airflow remains constant and does not increase with temperature. By maintaining a stable airflow output under different ambient temperatures, the operating noise of the fan is kept within a comfortable range, improving the user experience. At the same time, it prevents excessive airflow from drawing flames into the range hood, thus enhancing its safety performance.

[0044] According to the control method of the range hood of the present invention, under a preset environmental scenario, a preset target speed of the first fan when the ambient temperature is a preset ambient temperature and the current actual speed of the first fan when the ambient temperature is the current ambient temperature are obtained. Based on the speed difference between the preset target speed and the current actual speed, a target speed of the first fan corresponding to the current ambient temperature is determined. The power of the first fan is continuously adjusted based on the target speed, so that the current actual speed accurately follows the target speed, offsetting the influence of ambient temperature changes on the air volume of the range hood. This ensures that the fan can maintain a stable air volume output under different ambient temperatures, and the fan's operating noise is kept within a comfortable range, improving the user experience. At the same time, it avoids the large air volume from sucking flames into the range hood, improving the safety performance of the range hood.

[0045] In some embodiments, determining the target speed of the first fan at the current ambient temperature based on the preset target speed and the current actual speed includes: determining a speed compensation factor based on the current actual speed and the preset target speed; and determining the target speed based on the preset target speed and the speed compensation factor.

[0046] In this embodiment, a preset target speed R0 and the current actual speed r are determined. i Then, the current actual speed r i The difference between the target speed R0 and the preset target speed R0 is used as the speed compensation factor K. i The formula for calculating the speed compensation factor is: K i =r i -R0, and according to different ambient temperatures T i Set the power P and speed compensation factor K i Form N i As the temperature rises and the air becomes thinner, the motor resistance decreases, and under the same power conditions, the current actual speed of the first fan increases.

[0047] The preset target speed R0 and the speed compensation factor K i The difference is used as the target speed R.i The formula for calculating the target rotational speed is: R i =R0-K i This reduces the target rotational speed R when the ambient temperature rises. i To keep the range hood at ambient temperature T i At runtime, based on form N i Automatic dynamic balancing is performed to adjust the power of the first fan to achieve the target speed R. i and actual rotational speed r i Consistency is ensured, thus maintaining a constant airflow in the range hood that does not increase with rising temperature. The main control module can sense the impact of ambient temperature on fan performance in real time and automatically adjust the target speed through a speed compensation factor, improving system robustness while ensuring airflow stability.

[0048] In some embodiments, the preset environment scenario includes: the target air volume of the first fan is a preset air volume, the back pressure of the first fan is a preset pressure, and the set power of the first fan is a preset power.

[0049] In this embodiment, the ambient temperature collected is room temperature, i.e., T. i Under the condition of 25℃, when the target air volume of the first fan is the preset air volume L, the back pressure of the first fan is the preset pressure F, and the set power of the first fan is the preset power P, it is considered that the first fan is in the preset environmental scenario. Based on the preset power P and the actual speed r0, form N0 is formed, and the preset target speed R0 is defined as r0. At this time, the preset target speed R0 is the reference value calibrated by the experiment, so that the range hood can automatically and dynamically adjust the preset power P according to form N0 when running at room temperature.

[0050] In some embodiments, the control method further includes: acquiring stove usage information; and controlling the power of the first fan based on the stove usage information and the current ambient temperature.

[0051] In this embodiment, the usage information of the stove is obtained, and it is determined whether a pot is placed on the stove based on the stove usage information. When no pot is placed on the stove, such as when the stove is empty and heating, even if the ambient temperature rises, it may be due to user misoperation or equipment malfunction, so no operation is performed. When a pot is placed on the stove and cooking is in progress, the rise in ambient temperature is strongly correlated with the cooking process. At this time, the power of the first fan is controlled based on the stove usage information and the current ambient temperature, which is more in line with the actual scenario that the user is cooking and needs to balance smoke extraction and safety. This reduces the problem of erroneous power limiting when there is no pot, which may lead to smoke extraction failure or accidental shutdown affecting the user's use, and improves the control accuracy of the range hood.

[0052] In some embodiments, controlling the power of the first fan based on stove usage information and the current ambient temperature includes: when it is determined based on stove usage information that a pot is placed on the stove, and the current ambient temperature is greater than a first preset temperature threshold for a duration exceeding a first preset time, controlling the power of the first fan to not exceed the first power threshold. When it is determined based on stove usage information that a pot is placed on the stove, and the current ambient temperature is greater than a second preset temperature threshold for a duration exceeding a second preset time, controlling the power of the first fan to not exceed the second power threshold. When it is determined based on stove usage information that a pot is placed on the stove, and the current ambient temperature is greater than a third preset temperature threshold for a duration exceeding a third preset time, controlling the first fan to turn off and issuing an alarm indicating that the ambient temperature is too high, wherein the first preset temperature is lower than the second preset temperature, the second preset temperature is lower than the third preset temperature, the first preset power threshold is greater than the second preset power threshold, the first preset time is greater than the second preset time, and the second preset time is greater than the third preset time.

[0053] In this embodiment, when it is determined based on the stove usage information that a pot is placed on the stove, and the current ambient temperature is greater than the first set temperature threshold T1 and the duration exceeds the first preset time t1, it is considered that the ambient temperature is slightly high and the operating power of the first fan needs to be limited to reduce its speed and improve safety. Therefore, the power of the first fan is controlled to not exceed the first power threshold P1. The first set temperature threshold T1 is relatively low, and the first preset time t1 needs to be a relatively long duration to trigger the limit, so as to avoid misjudgment of temperature fluctuations during brief door opening and stove ignition, and to ensure the stability of the fan power during normal cooking.

[0054] When it is determined from the stove usage information that a pot is placed on the stove, and the current ambient temperature is greater than the second set temperature threshold T2 and the duration exceeds the second preset time t2, it is considered that the ambient temperature is high at this time, and the operating power of the first fan needs to be further limited. Therefore, the power of the first fan is controlled to not exceed the second power threshold P2. Since the second set temperature threshold T2 is high, the duration of the second preset time t2 needs to be shortened. When the temperature rises rapidly, timely intervention is needed to prevent the accumulation of danger.

[0055] When it is determined from the stove usage information that a pot is placed on the stove, and the current ambient temperature is higher than the third set temperature threshold T3 and the duration exceeds the third preset time t3, it is considered that there is an open flame on the stove. The first fan is then shut off to prevent the flame from being drawn into the range hood, and an alarm is issued to indicate that the ambient temperature is too high. The third set temperature threshold T3 is close to the equipment's tolerance limit, and the third preset time t3 has the shortest duration, ensuring a rapid shutdown when a high-temperature risk occurs. This allows the user time to react while minimizing the probability of equipment damage. The alarm clearly states the reason for the high temperature, guiding the user to take measures such as turning on the kitchen air conditioner, reducing the stove's heat, and opening windows for ventilation, avoiding continued danger due to lack of awareness, such as the risk of gas leaks or heatstroke caused by high temperatures. Active alarm recording of the environmental status assists in subsequent troubleshooting, such as distinguishing whether the shutdown is caused by a fan malfunction or excessive ambient heat, clearly defining responsibility and improving after-sales efficiency.

[0056] The temperature threshold is set in a gradient manner, with the first preset temperature being lower than the second preset temperature, and the second preset temperature being lower than the third preset temperature. Based on the component's temperature tolerance classification, this ensures that appropriate heat dissipation measures are taken under different risk levels, neither over-dissipating heat nor overlooking dangers. The time threshold is set in a reverse gradient manner, with the first preset time being greater than the second preset time, and the second preset time being greater than the third preset time. Essentially, the higher the temperature, the faster the danger response, which avoids false triggering caused by instantaneous temperature fluctuations and ensures rapid intervention in high-temperature dangers.

[0057] In some embodiments, when it is determined based on stove usage information that a pot is placed on the stove and the current ambient temperature is greater than a third set temperature threshold and the duration exceeds a third preset time, the method further includes: transmitting a preset control command to the stove for instructing it to turn off, so that the stove turns off in response to the preset control command.

[0058] In this embodiment, the main control module is connected to the first wireless module and achieves linkage between the range hood and the stove. The first wireless module can report stove data, such as firepower, timer, cookware status, and temperature, to the main control module. The first wireless module can also synchronize range hood data to the stove. When it is determined based on stove usage information that a cookware is placed on the stove and the current ambient temperature is greater than the third set temperature threshold T3 for a duration exceeding the third preset time t3, the range hood will turn off and emit a buzzer to alert the user of the high temperature. At the same time, the range hood will send a preset control command indicating that the flame should be turned off to the stove through the linkage between the range hood and the stove, so that the stove can respond to the preset control command and turn off the flame, thus preventing the flame from being sucked into the range hood.

[0059] In some embodiments, the range hood further includes a second fan for generating an air curtain to prevent cooking fumes from escaping, the second fan also serving to prevent heat from the stove from dissipating. The control method further includes controlling the rotational speed of the second fan based on the current ambient temperature.

[0060] In this embodiment, second motors are installed on both sides of the range hood control panel. The second motor control module controls the rotation of these motors to form an escape-prevention air curtain, preventing the escape of cooking fumes and the leakage of cooking particles. Even under conditions of strong stir-frying fumes or crosswinds, it effectively blocks the fumes, making it suitable even for stir-frying. Furthermore, the module can control the rotation speed of the second motors to regulate the air curtain's wind speed. The current ambient temperature T is obtained. i After that, it can also be based on the ambient temperature T i The relationship between the temperature and the set temperature threshold is used to control the second fan, further reducing the loss of heat generated during cooking and improving user comfort.

[0061] In some embodiments, controlling the rotational speed of the second fan based on the current ambient temperature includes: when the current ambient temperature is greater than a fourth preset temperature threshold and the duration exceeds a fourth preset time, controlling the rotational speed of the second fan to not exceed a first preset rotational speed threshold; when the current ambient temperature is greater than a fifth preset temperature threshold and the duration exceeds a fifth preset time, controlling the rotational speed of the second fan to not exceed a second preset rotational speed threshold; when the current ambient temperature is greater than a sixth preset temperature threshold and the duration exceeds a sixth preset time, controlling the rotational speed of the second fan to not exceed a third preset rotational speed threshold; wherein the fourth preset temperature is less than the fifth preset temperature, the fifth preset temperature is less than the sixth preset temperature, the first preset rotational speed threshold is less than the second preset rotational speed threshold, the second preset rotational speed threshold is less than the third preset rotational speed threshold, the fourth preset time is greater than the fifth preset time, and the fifth preset time is greater than the sixth preset time.

[0062] In this embodiment, when the current ambient temperature is greater than the fourth preset temperature threshold T1 and the duration exceeds the fourth preset time t1, the speed of the second fan is controlled to not exceed the first preset speed threshold R1, i.e., a lower speed. At this time, the ambient temperature rises slightly but does not reach the dangerous value. The low-speed operation can remove some heat and avoid the fan from running at high load for a long time, which would cause it to wear out.

[0063] When the current ambient temperature is greater than the fifth set temperature threshold T2 and the duration exceeds the fifth preset time t2, the speed of the second fan is controlled to not exceed the second preset speed threshold R2, i.e., medium speed. When the ambient temperature rises further, the heat dissipation pressure of key components increases. By increasing the speed to enhance convection, the component temperature is controlled within a safe range.

[0064] When the current ambient temperature is greater than the sixth set temperature threshold T3 and the duration exceeds the sixth preset time t3, the speed of the second fan is controlled to not exceed the third preset speed threshold R3, i.e., the maximum speed, to enhance the barrier air curtain, reduce the heat loss generated during cooking, and issue an alarm to indicate that the ambient temperature is too high. When the ambient temperature approaches the danger value, the fan dissipates heat at maximum power to quickly remove heat and prevent serious failures such as component burnout and circuit short circuit caused by overheating.

[0065] The temperature threshold is set in a gradient manner, with the fourth preset temperature being lower than the fifth preset temperature, and the fifth preset temperature being lower than the sixth preset temperature. Based on the component's temperature tolerance classification, this ensures that appropriate heat dissipation measures are taken under different risk levels, neither over-dissipating heat nor overlooking dangers. The time threshold is set in a reverse gradient manner, with the fourth preset time being greater than the fifth preset time, and the fifth preset time being greater than the sixth preset time. Essentially, the higher the temperature, the shorter the allowed duration, and the faster the danger response. This avoids false triggering caused by instantaneous temperature fluctuations and ensures rapid intervention in high-temperature dangers.

[0066] The following is for reference. Figure 3 The control method of the range hood in this embodiment of the invention will be illustrated by example.

[0067] like Figure 3 As shown, the control method of the range hood in this embodiment of the invention includes at least steps S11-S25.

[0068] Step S11: Given that the target air volume of the first fan is a preset air volume, the back pressure of the first fan is a preset pressure, and the set power of the first fan is a preset power, obtain the preset target speed and the current actual speed of the first fan. The preset target speed is the speed of the first fan when the ambient temperature is a preset ambient temperature, and the current actual speed is the speed of the first fan when the ambient temperature is the current ambient temperature. The ambient temperature is the ambient temperature within a preset area of ​​the range hood, and the preset area is the smoke collection area of ​​the range hood.

[0069] Step S12: The difference between the actual rotational speed and the preset target rotational speed is used as the rotational speed compensation factor.

[0070] Step S13: The difference between the preset target speed and the speed compensation factor is taken as the target speed.

[0071] Step S14: Control the power of the first fan based on the target speed to adjust the current actual speed to the target speed.

[0072] Step S15: Obtain stove usage information.

[0073] Step S16: Determine the stove usage information to confirm that there is a pot on the stove and that the current ambient temperature is greater than the first set temperature threshold and the duration exceeds the first preset time. If so, proceed to step S17; otherwise, proceed to step S18.

[0074] Step S17: Control the power of the first fan to not exceed the first power threshold.

[0075] Step S18: Determine the stove usage information to confirm that there is a pot on the stove and that the current ambient temperature is greater than the second set temperature threshold and the duration exceeds the second preset time. If so, proceed to step S19; otherwise, proceed to step S20.

[0076] Step S19: Control the power of the first fan to not exceed the second power threshold.

[0077] Step S20: Control the first fan to turn off and issue an alarm to indicate that the ambient temperature is too high; transmit a preset control command to the stove to indicate that the stove will turn off the flame in response to the preset control command.

[0078] Step S21: Determine if the current ambient temperature is greater than the fourth set temperature threshold and the duration exceeds the fourth preset time. If so, proceed to step S22; otherwise, proceed to step S23.

[0079] Step S22: Control the speed of the second fan to not exceed the first preset speed threshold.

[0080] Step S23: Determine if the current ambient temperature is greater than the fifth set temperature threshold and the duration exceeds the fifth preset time. If so, proceed to step S24; otherwise, proceed to step S25.

[0081] Step S24: Control the speed of the second fan to not exceed the second preset speed threshold.

[0082] Step S25: Control the speed of the second fan to not exceed the third preset speed threshold.

[0083] According to the control method of the range hood of the present invention, under a preset environmental scenario, a preset target speed of the first fan when the ambient temperature is a preset ambient temperature and the current actual speed of the first fan when the ambient temperature is the current ambient temperature are obtained. Based on the speed difference between the preset target speed and the current actual speed, a target speed of the first fan corresponding to the current ambient temperature is determined. The power of the first fan is continuously adjusted based on the target speed, so that the current actual speed accurately follows the target speed, offsetting the influence of ambient temperature changes on the air volume of the range hood. This ensures that the fan can maintain a stable air volume output under different ambient temperatures, and the fan's operating noise is kept within a comfortable range, improving the user experience. At the same time, it avoids the large air volume from sucking flames into the range hood, improving the safety performance of the range hood.

[0084] The following is combined Figure 4 The control device 10 of the range hood described in this embodiment of the invention includes a first fan for exhausting oil fumes.

[0085] like Figure 4 As shown, the control device 10 for a range hood according to an embodiment of the present invention includes: an acquisition module 101, a determination module 102, and an adjustment module 103, wherein, The acquisition module 101 is used to acquire the preset target speed and the current actual speed of the first fan under a preset environmental scenario, wherein the preset target speed is the speed of the first fan when the ambient temperature is a preset ambient temperature, and the current actual speed is the speed of the first fan when the ambient temperature is the current ambient temperature; the determination module 102 is used to determine the target speed of the first fan at the current ambient temperature based on the preset target speed and the current actual speed; the adjustment module 103 is used to control the power of the first fan based on the target speed to adjust the current actual speed to the target speed.

[0086] According to the control device 10 of the range hood of the present invention, under a preset environmental scenario, the device acquires the preset target speed of the first fan when the ambient temperature is a preset ambient temperature and the current actual speed of the first fan when the ambient temperature is the current ambient temperature. Based on the speed difference between the preset target speed and the current actual speed, the device determines the target speed of the first fan at the current ambient temperature. Based on the target speed, the device continuously adjusts the power of the first fan so that the current actual speed accurately follows the target speed, thereby offsetting the influence of ambient temperature changes on the air volume of the range hood. This ensures that the fan can maintain a stable air volume output under different ambient temperatures, and the fan's operating noise remains within a comfortable range, improving the user experience. At the same time, it prevents the flame from being sucked into the range hood due to excessive air volume, thus improving the safety performance of the range hood.

[0087] It should be noted that the control device of the range hood in this embodiment of the invention controls the range hood in a manner similar to the control method of the range hood described in the above embodiment of the invention. For details, please refer to the description of the control method of the range hood. To reduce redundancy, it will not be repeated here.

[0088] The following is combined Figure 5 The range hood 110 of the present invention is described in an embodiment.

[0089] like Figure 5 As shown, the range hood 110 of this embodiment includes a range hood body and a control device 10 of the range hood described above.

[0090] According to an embodiment of the present invention, the range hood 110, under a preset environmental scenario, obtains the preset target speed of the first fan when the ambient temperature is a preset ambient temperature and the current actual speed of the first fan when the ambient temperature is the current ambient temperature. Based on the speed difference between the preset target speed and the current actual speed, it determines the target speed of the first fan at the current ambient temperature. Based on the target speed, it continuously adjusts the power of the first fan so that the current actual speed accurately follows the target speed, offsetting the impact of ambient temperature changes on the air volume of the range hood. This ensures that the fan can maintain a stable air volume output under different ambient temperatures, and the fan's operating noise remains within a comfortable range, improving the user experience. At the same time, it avoids the large air volume from sucking flames into the range hood, improving the safety performance of the range hood.

[0091] Furthermore, other configurations and functions of the range hood 110 according to the above embodiments of the present invention are known to those skilled in the art, and will not be described in detail in order to reduce redundancy.

[0092] The following describes a computer-readable storage medium according to embodiments of the present invention.

[0093] The computer-readable storage medium of this invention stores a control program for a range hood, which, when executed by a processor, implements the control method for the range hood described in the above embodiments.

[0094] According to the computer-readable storage medium of the present invention, when the control program of the range hood stored thereon is executed, it can determine the target speed of the first fan at the current ambient temperature by acquiring the preset target speed of the first fan when the ambient temperature is a preset ambient temperature and the current actual speed of the first fan when the ambient temperature is the current ambient temperature, based on the speed difference between the preset target speed and the current actual speed, and continuously adjust the power of the first fan based on the target speed, so that the current actual speed accurately follows the target speed, thereby offsetting the influence of ambient temperature changes on the air volume of the range hood, so that the fan can maintain a stable air volume output under different ambient temperatures, keep the fan's operating noise within a comfortable range, improve the user experience, and at the same time avoid the large air volume from sucking the flame into the range hood, thus improving the safety performance of the range hood.

[0095] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0096] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A control method for a range hood, characterized in that, The range hood includes a first fan for exhausting cooking fumes, and the control method includes: Under a preset environmental scenario, the preset target speed and the current actual speed of the first fan are obtained, wherein the preset target speed is the speed of the first fan when the ambient temperature is a preset ambient temperature, and the current actual speed is the speed of the first fan when the ambient temperature is the current ambient temperature; The target speed of the first fan at the current ambient temperature is determined based on the preset target speed and the current actual speed. The power of the first fan is controlled based on the target rotational speed to adjust the current actual rotational speed to the target rotational speed.

2. The control method for a range hood according to claim 1, characterized in that, Determining the target speed of the first fan at the current ambient temperature based on the preset target speed and the current actual speed includes: The difference between the current actual speed and the preset target speed is used as the speed compensation factor; The difference between the preset target speed and the speed compensation factor is taken as the target speed.

3. The control method for a range hood according to claim 1, characterized in that, The preset environment scenario includes: the target air volume of the first fan is a preset air volume, the back pressure of the first fan is a preset pressure, and the set power of the first fan is a preset power.

4. The control method for a range hood according to claim 1, characterized in that, The control method further includes: Obtain information on stove usage; The power of the first fan is controlled based on the stove usage information and the current ambient temperature.

5. The control method for a range hood according to claim 4, characterized in that, The method of controlling the power of the first fan based on stove usage information and the current ambient temperature includes: When it is determined based on the stove usage information that a pot is placed on the stove, and the current ambient temperature is greater than a first set temperature threshold and the duration exceeds a first preset time, the power of the first fan is controlled to not exceed a first power threshold. When it is determined based on the stove usage information that a pot is placed on the stove, and the current ambient temperature is greater than the second set temperature threshold and the duration exceeds the second preset time, the power of the first fan is controlled to not exceed the second power threshold. When it is determined based on the stove usage information that a pot is placed on the stove, and the current ambient temperature is greater than a third preset temperature threshold and the duration exceeds a third preset time, the first fan is turned off, and an alarm is issued to indicate that the ambient temperature is too high. The first preset temperature is less than the second preset temperature, the second preset temperature is less than the third preset temperature, the first preset power threshold is greater than the second preset power threshold, the first preset time is greater than the second preset time, and the second preset time is greater than the third preset time.

6. The control method for a range hood according to claim 5, characterized in that, When it is determined based on the stove usage information that a pot is placed on the stove, and the current ambient temperature is greater than a third set temperature threshold for a duration exceeding a third preset time, the method further includes: A preset control command is transmitted to the stove to instruct it to turn off, so that the stove turns off in response to the preset control command.

7. The control method for a range hood according to claim 1, characterized in that, The range hood further includes a second fan for generating an air curtain to prevent the escape of cooking fumes, and the control method further includes: When the current ambient temperature is greater than the fourth preset temperature threshold and the duration exceeds the fourth preset time, the speed of the second fan is controlled to not exceed the first preset speed threshold. When the current ambient temperature is greater than the fifth set temperature threshold and the duration exceeds the fifth preset time, the speed of the second fan is controlled to not exceed the second preset speed threshold. When the current ambient temperature is greater than the sixth preset temperature threshold and the duration exceeds the sixth preset time, the rotation speed of the second fan is controlled to not exceed the third preset rotation speed threshold; wherein, the fourth preset temperature is less than the fifth preset temperature, the fifth preset temperature is less than the sixth preset temperature, the first preset rotation speed threshold is less than the second preset rotation speed threshold, the second preset rotation speed threshold is less than the third preset rotation speed threshold, the fourth preset time is greater than the fifth preset time, and the fifth preset time is greater than the sixth preset time.

8. A control device for a range hood, characterized in that, The range hood includes a first fan for exhausting cooking fumes, and the control device includes: The acquisition module is used to acquire the preset target speed and the current actual speed of the first fan in a preset environmental scenario, wherein the preset target speed is the speed of the first fan when the ambient temperature is a preset ambient temperature, and the current actual speed is the speed of the first fan when the ambient temperature is the current ambient temperature; The determining module is used to determine the target speed of the first fan at the current ambient temperature based on the preset target speed and the current actual speed; An adjustment module is used to control the power of the first fan based on the target speed, so as to adjust the current actual speed to the target speed.

9. A range hood, characterized in that, include: The range hood body and the control device for the range hood as described in claim 8.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a control program for a range hood, which, when executed by a processor, implements the control method for a range hood as described in any one of claims 1-7.

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