Range hood and its control method, system, device and medium

Abstract

The present disclosure provides an oil fume machine and its control method, system, device and medium. The control method includes: based on a number of groups of historical data under each preset working scenario, fitting to generate a preset temperature curve for the corresponding preset working scenario; based on a number of groups of actual data, fitting to generate an actual temperature curve for the current working scenario; comparing the actual temperature curve with different preset temperature curves, and determining the actual working scenario to which the current working scenario belongs based on the comparison result, and controlling the oil fume machine to work in a working mode matching the actual working scenario. The present disclosure controls the temperature acquisition device to continuously change the viewing angle opening at a preset frequency to obtain the actual temperature curve, and compares this curve with the curve of the preset working scenario to match the current actual working scenario, so as to accurately control the switch and gear switching of the oil fume machine, thereby better adapting to the current cooking state, improving the oil fume extraction effect, and enhancing the user's cooking experience.

Description

Technical Field

[0001] The present disclosure belongs to the technical field of range hoods, and particularly relates to a range hood and its control method, system, device, and medium. Background Art

[0002] As a commonly used kitchen appliance, a range hood is an essential appliance for sucking cooking fumes when people cook daily. Now many range hoods come with voice interaction functions and infrared temperature measurement functions. When traditional range hoods are linked with stoves, the stoves need to have corresponding signal transceiver modules, which is not conducive to users' free choice of stoves; the motors of traditional range hoods usually operate at fixed gears or fixed speeds, and have poor adaptability to changes in cooking states; moreover, the oil fume sensors installed in traditional range hoods are mainly used to identify the presence or absence of oil fumes, and judge the size of the oil fumes by changes in optical signals or electrical signals near the sensors. In fact, they all change the rotation speed to perform oil fume suction processing after the oil fumes have filled the air, resulting in a certain delay in the response to the cooking state. Therefore, range hoods that are linked with stoves through infrared temperature measurement have emerged.

[0003] However, when the infrared temperature measurement function of the current range hood is linked with the stove, a low-cost monochromatic light infrared sensor similar to a thermopile is mostly used to measure the average temperature within the field of view at a fixed viewing angle opening. Ordinary low-cost monochromatic infrared sensors, such as Figure 1 shown, generally measure the average temperature within the field of view at a fixed viewing angle opening (i.e., the average temperature of the circular area region projected by the cone in the figure). In different situations such as when the target temperature measurement area is larger than the field of view (Situation A in the figure), the target temperature measurement area is equal to the field of view (Situation B in the figure), and the target temperature measurement area is smaller than the field of view (Situation C in the figure), the actual temperature measurement effects are uneven, and the signal characteristic values change greatly. It is difficult to accurately identify different actual working scenarios such as different sizes of cookware and the presence or absence of cookware, and manually adjusting the sensor gear will result in a slow temperature measurement feedback speed, thus leading to the problem that it is difficult to adjust the working mode of the range hood in a timely and accurate manner. Summary of the Invention

[0004] The technical problem to be solved by the present disclosure is to overcome the defects in the prior art that the actual temperature above the stove in a fixed field of view is collected by a temperature acquisition device with a fixed viewing angle opening to adjust the working mode of the range hood, resulting in untimely and inaccurate temperature measurement and difficult flexible change of the working mode, and to provide a range hood and its control method, system, device, and medium.

[0005] The present disclosure solves the above technical problem through the following technical solutions:

[0006] The present disclosure provides a control method for a range hood, wherein a temperature acquisition device with a variable viewing angle opening is provided at a preset position of the range hood, and the control method includes:

[0007] Under different preset working scenarios, the temperature acquisition device is used to collect several groups of historical data respectively, and each group of the historical data includes a historical temperature value above the burner head at a set viewing angle opening;

[0008] Based on several groups of the historical data under each preset working scenario, a preset temperature curve corresponding to the preset working scenario is fitted and generated;

[0009] The temperature acquisition device is used to collect several groups of actual data in the current working scenario, and each group of the actual data includes an actual temperature value above the burner head at an actual viewing angle opening;

[0010] Based on several groups of the actual data, an actual temperature curve of the current working scenario is fitted and generated;

[0011] Compare the actual temperature curve with different preset temperature curves, and determine the actual working scenario to which the current working scenario belongs based on the comparison result, and control the range hood to work in a working mode matching the actual working scenario.

[0012] Preferably, the temperature acquisition device is arranged at a position on the range hood directly opposite the center of the burner head, and the step of using the temperature acquisition device to collect several groups of actual data in the current working scenario, and each group of the actual data includes an actual temperature value above the burner head at an actual viewing angle opening includes:

[0013] Use the minimum viewing angle opening of the temperature acquisition device to collect the first temperature above the burner head;

[0014] Take the connection line between the temperature acquisition device and the edge of the burner head as the maximum viewing angle opening, and use the temperature acquisition device to collect the second temperature above the burner head at the maximum viewing angle opening;

[0015] Judge whether the temperature difference between the first temperature and the second temperature is greater than a preset difference;

[0016] If so, execute the step of fitting and generating an actual temperature curve of the current working scenario based on several groups of the actual data;

[0017] If not, determine that the burner head is in the off state, and control the range hood to close.

[0018] Preferably, the control method further includes:

[0019] Gradually increase the set viewing angle opening in sequence, and obtain the historical temperature value above the burner head at each set viewing angle opening to obtain several groups of the historical data;

[0020] Based on several groups of the historical data, fit and generate the preset temperature curve;

[0021] Increase the actual viewing angle opening degree successively, and obtain the actual temperature value above the burner at each actual viewing angle opening degree to obtain several groups of the actual data;

[0022] Generate the actual temperature curve by fitting based on several groups of the actual data;

[0023] The steps of comparing the actual temperature curve with different preset temperature curves, determining the actual working scenario to which the current working scenario belongs based on the comparison result, and controlling the range hood to work in a working mode matching the actual working scenario include:

[0024] Judge whether the actual temperature curve conforms to the change trend of being stable first and then decreasing;

[0025] If so, it is determined that a cooking device is placed on the burner corresponding to the temperature acquisition device.

[0026] Preferably, after the step of determining that a cooking device is placed on the burner corresponding to the temperature acquisition device, the following is further included:

[0027] Obtain the viewing angle opening degree change value corresponding to the temperature stable section in the actual temperature curve;

[0028] Judge whether the viewing angle opening degree change value is greater than a preset change value;

[0029] If so, it is determined that the size of the cooking device is greater than a preset size, and the range hood is controlled to work at a first power;

[0030] If not, it is determined that the size of the cooking device is less than or equal to the preset size, and the range hood is controlled to work at a second power;

[0031] Wherein, the first power is greater than the second power.

[0032] Preferably, the control method further includes:

[0033] When the actual temperature curve does not conform to the change trend of being stable first and then decreasing, conforms to the change trend of rising first and then decreasing, and there are double peaks in the rising stage of the actual temperature curve, it is determined that no cooking device is placed on the burner and the burner is in a high-fire state, and the working power of the range hood is controlled to be reduced to a third power.

[0034] Preferably, the control method further includes:

[0035] After controlling the working power of the range hood to decrease to the third power, or when there is no double peak in the rising stage of the actual temperature curve, determine whether the actual temperature curve meets the first preset condition and the second preset condition;

[0036] Wherein, the first preset condition is that the duration for which the actual temperature curve conforms to the changing trend of first rising and then falling is greater than the first preset time; the second preset condition is that the average value of the actual temperature values at each of the actual viewing angle openings is less than a preset average value, or the decrease value of the actual temperature value within a unit viewing angle opening is less than a preset decrease value;

[0037] If so, determine that the burner is in the off state and control the range hood to close.

[0038] Preferably, the control method further includes:

[0039] Before controlling the working power of the range hood to decrease to the third power, generate a first prompt message for reducing the burner firepower;

[0040] and / or,

[0041] When the actual temperature curve meets the first preset condition and does not meet the second preset condition, the control method further includes:

[0042] Generate a second prompt message for controlling the burner to close.

[0043] Preferably, the control method further includes:

[0044] When the actual temperature curve does not conform to the changing trend of first rising and then falling, obtain the temperature change curve of the actual temperature value above the burner at a fixed viewing angle opening within a second preset time;

[0045] When the actual temperature value changes periodically within the second preset time, determine that the cooking device on the burner is in the wok-tossing state and control the working power of the range hood to increase to the fourth power.

[0046] The present disclosure also provides a control system for a range hood. A temperature acquisition device with a variable viewing angle opening is provided at a preset position of the range hood. The control system includes:

[0047] A historical data acquisition module, configured to respectively acquire a plurality of groups of historical data by using the temperature acquisition device under different preset working scenarios. Each group of historical data includes a historical temperature value above the burner at a set viewing angle opening;

[0048] A preset curve fitting module, which is used to generate a preset temperature curve corresponding to each of the preset working scenarios by fitting based on several groups of the historical data under each of the preset working scenarios;

[0049] An actual data acquisition module, which is used to acquire several groups of actual data in the current working scenario by using the temperature acquisition device, and each group of the actual data includes an actual temperature value above the burner head at an actual viewing angle opening;

[0050] An actual curve fitting module, which is used to generate an actual temperature curve of the current working scenario by fitting based on several groups of the actual data;

[0051] A working mode control module, which is used to compare the actual temperature curve with different preset temperature curves, determine the actual working scenario to which the current working scenario belongs based on the comparison result, and control the range hood to work in a working mode matching the actual working scenario.

[0052] Preferably, the temperature acquisition device is arranged at a position on the range hood directly opposite the center of the burner head, and the actual data acquisition module is further used for:

[0053] Acquiring a first temperature above the burner head by using the minimum viewing angle opening of the temperature acquisition device;

[0054] Taking the connecting line between the temperature acquisition device and the edge of the burner head as the maximum viewing angle opening, and acquiring a second temperature above the burner head at the maximum viewing angle opening by using the temperature acquisition device;

[0055] Judging whether the temperature difference between the first temperature and the second temperature is greater than a preset difference;

[0056] If so, execute the step of generating an actual temperature curve of the current working scenario by fitting based on several groups of the actual data;

[0057] If not, determine that the burner head is in the off state and control the range hood to turn off.

[0058] Preferably, the historical data acquisition module is further used to sequentially increase the set viewing angle opening and obtain the historical temperature value above the burner head at each set viewing angle opening to obtain several groups of the historical data;

[0059] The preset curve fitting module is further used to generate the preset temperature curve by fitting based on several groups of the historical data;

[0060] The actual data acquisition module is further used to sequentially increase the actual viewing angle opening and obtain the actual temperature value above the burner head at each actual viewing angle opening to obtain several groups of the actual data;

[0061] The actual curve fitting module is also used to generate the actual temperature curve by fitting based on several groups of the actual data;

[0062] The working mode control module is also used to judge whether the actual temperature curve conforms to the change trend of being stable first and then decreasing; if so, it is determined that a cooking device is placed on the burner corresponding to the temperature acquisition device.

[0063] Preferably, the working mode control module is also used to:

[0064] Obtain the change value of the viewing angle opening corresponding to the temperature stable section in the actual temperature curve;

[0065] Judge whether the change value of the viewing angle opening is greater than a preset change value;

[0066] If so, it is determined that the size of the cooking device is greater than a preset size, and the range hood is controlled to work at a first power;

[0067] If not, it is determined that the size of the cooking device is less than or equal to the preset size, and the range hood is controlled to work at a second power;

[0068] Wherein, the first power is greater than the second power.

[0069] Preferably, the working mode control module is also used to:

[0070] When the actual temperature curve does not conform to the change trend of being stable first and then decreasing, conforms to the change trend of rising first and then decreasing, and there are two peaks in the rising stage of the actual temperature curve, it is determined that no cooking device is placed on the burner and the burner is in the high-fire state, and the working power of the range hood is controlled to be reduced to a third power.

[0071] Preferably, the working mode control module is also used to:

[0072] After controlling the working power of the range hood to be reduced to the third power, or when there are no two peaks in the rising stage of the actual temperature curve, judge whether the actual temperature curve meets a first preset condition and a second preset condition;

[0073] Wherein, the first preset condition is that the duration of the actual temperature curve conforming to the change trend of rising first and then decreasing is greater than a first preset time; the second preset condition is that the average value of the actual temperature values at each actual viewing angle opening is less than a preset average value, or the decrease value of the actual temperature value within a unit viewing angle opening is less than a preset decrease value;

[0074] If so, it is determined that the burner is in the flame-out state, and the range hood is controlled to be turned off.

[0075] Preferably, the control system further includes a prompt information generation module for:

[0076] Before the working power of the range hood is controlled to decrease to the third power, generating a first prompt information for reducing the firepower of the stove head;

[0077] And / or,

[0078] When the actual temperature curve meets the first preset condition and does not meet the second preset condition, the control method further includes:

[0079] Generating a second prompt information for controlling the stove head to turn off.

[0080] Preferably, the control system further includes:

[0081] A temperature change curve fitting module for obtaining the temperature change curve of the actual temperature value above the stove head at a fixed viewing angle opening within a second preset time when the actual temperature curve does not conform to the change trend of rising first and then falling;

[0082] The working mode control module is further configured to determine that the cooking device on the stove head is in the state of stir-frying when the actual temperature value changes periodically within the second preset time, and control the working power of the range hood to increase to the fourth power.

[0083] The present disclosure also provides a range hood, which includes the control system of the range hood as described above.

[0084] The present disclosure also provides an electronic device, including a memory, a processor, and a computer program stored on the memory and used to run on the processor. When the processor executes the computer program, the control method of the range hood as described above is implemented.

[0085] The present disclosure also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the control method of the range hood as described above is implemented.

[0086] On the basis of conforming to the common knowledge in the art, each preferred condition can be combined arbitrarily to obtain each preferred embodiment of the present disclosure.

[0087] The positive and progressive effects of the present disclosure are as follows: By providing a temperature acquisition device with a variable viewing angle opening on the range hood, and controlling the temperature acquisition device to continuously change the viewing angle opening at a preset frequency to obtain the actual temperature curve, and comparing this curve with the curves of multiple built-in preset working scenarios of the range hood to match the current actual working scenario. At the same time, supplementing with the temperature-time curve at a fixed viewing angle opening, the range hood's switch and gear shifting can be controlled more accurately, thereby better adapting to the current cooking state, improving the oil fume extraction effect, and enhancing the user's cooking experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0088] Figure 1 It is a schematic diagram of a common low-cost monochromatic infrared sensor in the background art of the present disclosure.

[0089] Figure 2 It is the first flowchart of the control method of the range hood according to Embodiment 1 of the present disclosure.

[0090] Figure 3 It is the first schematic diagram of the viewing angle opening of the temperature acquisition device on the range hood of the present disclosure.

[0091] Figure 4 It is the second schematic diagram of the viewing angle opening of the temperature acquisition device on the range hood of the present disclosure.

[0092] Figure 5 It is a schematic diagram of the scenarios of high fire and low fire when there is no pot on the stove top of the present disclosure.

[0093] Figure 6 It is a curve graph of high fire without a pot of the present disclosure.

[0094] Figure 7 It is a curve graph of low fire without a pot of the present disclosure.

[0095] Figure 8 It is a schematic diagram of the scenarios of a large pot and a small pot on the stove top of the present disclosure.

[0096] Figure 9 It is a curve graph of having a large pot of the present disclosure.

[0097] Figure 10 It is the first curve graph of having a small pot of the present disclosure.

[0098] Figure 11 It is the second curve graph of having a small pot of the present disclosure.

[0099] Figure 12 It is a curve graph in the scenario of flipping the pot of the present disclosure.

[0100] Figure 13 It is the second flowchart of the control method of the range hood according to Embodiment 1 of the present disclosure.

[0101] Figure 14Schematic diagram of the first module of the control system of the range hood according to Embodiment 2 of the present disclosure.

[0102] Figure 15 Schematic diagram of the second module of the control system of the range hood according to Embodiment 2 of the present disclosure.

[0103] Figure 16 Schematic diagram of the structure of the electronic device according to Embodiment 4 of the present disclosure. Detailed implementation manners

[0104] The present disclosure will be further described below by way of embodiments, but the present disclosure is not limited to the scope of the described embodiments.

[0105] Embodiment 1

[0106] This embodiment provides a control method for a range hood. A temperature acquisition device with a variable viewing angle opening is provided at a preset position of the range hood. As Figure 2 shown, the control method includes the following steps:

[0107] S1. Under different preset working scenarios, use the temperature acquisition device to collect several groups of historical data respectively. Each group of historical data includes a historical temperature value above the stove head at a set viewing angle opening;

[0108] S2. Based on several groups of historical data under each preset working scenario, fit and generate a preset temperature curve corresponding to the preset working scenario;

[0109] S3. Use the temperature acquisition device to collect several groups of actual data in the current working scenario. Each group of actual data includes an actual temperature value above the stove head at an actual viewing angle opening;

[0110] S4. Based on several groups of actual data, fit and generate an actual temperature curve in the current working scenario;

[0111] S5. Compare the actual temperature curve with different preset temperature curves, and based on the comparison result, determine the actual working scenario to which the current working scenario belongs, and control the range hood to work in a working mode matching the actual working scenario.

[0112] Figure 3 And Figure 4 show a schematic diagram of a temperature acquisition device with a variable viewing angle opening (or variable focus) (such as an infrared temperature sensor) provided on the range hood to collect the corresponding actual temperature value above the stove head. There is a temperature acquisition device directly above each of the two stove heads. Figure 3 In [reference numeral not provided in the original], the viewing angle opening of the temperature acquisition device is smaller (A1), and the corresponding average temperature value of a smaller field of view is collected. Figure 4 In [reference numeral not provided in the original], the viewing angle opening of the temperature acquisition device is larger (A2), and the corresponding average temperature value of a larger field of view is collected.

[0113] Steps S1 and S2 collect historical temperature values at multiple set viewing angle openings, fit and generate a preset temperature curve for the corresponding preset working scenario, and store the curve data in the control chip of the range hood as the built-in scenarios of the range hood, such as with a pot, without a pot, a large pot, a small pot, etc. When the range hood is actually working, steps S3 and S4 collect actual temperature values at multiple actual viewing angle openings and fit and generate an actual temperature curve for the corresponding current working scenario. Among them, the temperature acquisition device continuously changes the viewing angle opening of the acquisition view at a preset frequency. Step S5 compares and analyzes the actual temperature curve with different preset temperature curves read, matches the actual working scenario, and controls the range hood to work in the corresponding working mode.

[0114] In this solution, by setting a temperature acquisition device with a variable viewing angle opening on the range hood and controlling the temperature acquisition device to continuously change the viewing angle opening at a preset frequency to obtain a viewing angle - temperature curve, and comparing this curve with the curves of multiple built-in preset working scenarios of the range hood, the current actual working scenario is matched to control the on / off and gear switching of the range hood, so as to better adapt to the current cooking state, improve the effect of fume extraction, and enhance the cooking experience of users.

[0115] In an implementable solution, the temperature acquisition device is set at a position on the range hood directly opposite the center of the stove head. Step S3 includes:

[0116] Collect the first temperature above the stove head using the minimum viewing angle opening of the temperature acquisition device;

[0117] Using the connection line between the temperature acquisition device and the edge of the stove head as the maximum viewing angle opening, collect the second temperature above the stove head at the maximum viewing angle opening using the temperature acquisition device;

[0118] Judge whether the temperature difference between the first temperature and the second temperature is greater than a preset difference;

[0119] If so, execute the step of fitting and generating an actual temperature curve for the current working scenario based on several groups of actual data;

[0120] If not, determine that the stove head is in the off state and control the range hood to close.

[0121] Specifically, if the temperature in different regions above the stove head is basically the same, it indicates that the stove head is not turned on or has been turned off for some time, and there is no need to turn on the range hood at this time.

[0122] In this solution, by collecting the actual temperature values above the stove head at the maximum and minimum viewing angle openings to judge whether the stove head is in the firing state, unnecessary operation of the range hood can be avoided, thus saving energy and enhancing the user experience at the same time.

[0123] In an implementable solution, the control method further includes:

[0124] Sequentially increase the set viewing angle opening, and obtain the historical temperature values above the burner head at each set viewing angle opening to obtain several groups of historical data;

[0125] Based on several groups of historical data, fit and generate a preset temperature curve;

[0126] Sequentially increase the actual viewing angle opening, and obtain the actual temperature values above the burner head at each actual viewing angle opening to obtain several groups of actual data;

[0127] Compare the actual temperature curve with different preset temperature curves, and based on the comparison result, determine the actual working scenario to which the current working scenario belongs, and the steps of controlling the range hood to work in a working mode matching the actual working scenario include:

[0128] Judge whether the actual temperature curve conforms to the changing trend of first being stable and then decreasing;

[0129] If so, it is determined that a cooking device is placed on the burner head corresponding to the temperature acquisition device.

[0130] Specifically, control the viewing angle opening of the temperature acquisition device to increase from small to large (such as 5°, 7°, 9°, 11°, ……, 51°, ……), sequentially collect the temperature values above the burner head, and fit to obtain the viewing angle opening - temperature curve. It should be noted that the viewing angle opening of the temperature acquisition device does not need to be increased infinitely, and it is sufficient to cover the entire area of the burner head at most. The temperature corresponding to different viewing angle openings is the average temperature within the covered area at that viewing angle opening.

[0131] Since within the range of the cookware, the actual temperature value above the burner head will remain relatively stable, while the actual temperature value outside the cookware will decrease, therefore, when the actual temperature curve conforms to the changing trend of first being stable and then decreasing, it can be determined that a cooking device is placed on the burner head corresponding to the temperature acquisition device.

[0132] In this solution, by the changing trend of the actual temperature curve, it is possible to judge whether there is a cookware above the burner head, and the range hood can be controlled to work in a suitable working mode, so as to achieve a better oil fume removal effect and improve the user experience.

[0133] In an implementable solution, after the step of determining that a cooking device is placed on the burner head corresponding to the temperature acquisition device, it further includes:

[0134] Obtain the viewing angle opening change value corresponding to the stable temperature section in the actual temperature curve;

[0135] Judge whether the viewing angle opening change value is greater than the preset change value;

[0136] If so, determine that the size of the cooking device is greater than the preset size, and control the range hood to operate at the first power;

[0137] If not, determine that the size of the cooking device is less than or equal to the preset size, and control the range hood to operate at the second power;

[0138] Wherein, the first power is greater than the second power.

[0139] Specifically, obtain the change value of the viewing angle opening corresponding to the temperature stable section in the actual temperature curve. For example, if the viewing angle opening is in the range of 5° to 35°, and the corresponding actual temperature values are all in a stable and almost unchanged state, then the change value of the viewing angle opening is 30°; judge whether the change value of the viewing angle opening is greater than the preset change value, such as 25°; if so, it means that within a large range of changes in the viewing angle opening of the temperature acquisition device, the collected actual temperature values remain unchanged, which also means that the size of the cookware on the stove is large, and the range hood should be controlled to operate at a larger power; if not, it means that within a large range of changes in the viewing angle opening of the temperature acquisition device, the collected actual temperature values change, and the size of the cookware on the stove is small, and the range hood should be controlled to operate at a smaller power.

[0140] In this solution, by judging the magnitude relationship between the change value of the viewing angle opening in the stable section of the actual temperature curve and the preset change value, the size of the cooking device on the stove can be further determined, and then the range hood can be controlled to perform the oil fume extraction work in a more appropriate working mode.

[0141] In an implementable solution, the control method further includes:

[0142] When the actual temperature curve does not conform to the change trend of first being stable and then decreasing, conforms to the change trend of first increasing and then decreasing, and there are double peaks in the rising stage of the actual temperature curve, determine that there is no cooking device placed on the stove and the stove is in the high-fire state, and control the working power of the range hood to be reduced to the third power.

[0143] When the firepower of the stove is high (i.e., there is an inner ring fire and an outer ring fire), the actual temperature curve conforms to the change trend of first increasing and then decreasing, and double peaks will appear in the rising stage. Therefore, when the actual temperature curve does not conform to the change trend of first being stable and then decreasing, that is, when there is no cooking device on the stove, further judge whether the actual temperature curve conforms to the change trend of first increasing and then decreasing. If so, continue to judge whether there are double peaks in the rising stage of the curve. If so, determine that there is no cooking device placed on the stove and the stove is in the high-fire state. At this time, not much oil fume is generated. Therefore, control the working power of the range hood to be reduced to the third power.

[0144] In this solution, when no cooking device is placed on the burner, further determine whether the firepower of the burner is high, and then control the range hood to perform oil fume extraction work in a more appropriate working mode.

[0145] In an implementable solution, the control method further includes:

[0146] After the working power of the range hood is controlled to decrease to the third power, or when there are no double peaks in the rising stage of the actual temperature curve, determine whether the actual temperature curve meets the first preset condition and the second preset condition;

[0147] Among them, the first preset condition is that the duration during which the actual temperature curve conforms to the changing trend of first rising and then falling is greater than the first preset time; the second preset condition is that the average value of the actual temperature values at each actual viewing angle opening is less than the preset average value, or the decrease value of the actual temperature value within the unit viewing angle opening is less than the preset decrease value;

[0148] If so, determine that the burner is in the off state and control the range hood to turn off.

[0149] Specifically, when the actual temperature curve conforms to the changing trend of first rising and then falling, but there are no double peaks in the rising stage, it is determined that no cooking device is placed on the burner and the burner is in the low-fire state.

[0150] When the burner is in the low-fire state, or when the burner is in the high-fire state and the power of the range hood has been reduced to the third power, determine whether the actual temperature curve simultaneously meets the first preset condition and the second preset condition:

[0151] The first preset condition is that the duration during which the actual temperature curve conforms to the changing trend of first rising and then falling is greater than the first preset time, which means that the duration during which no cooking device is placed on the burner is relatively long.

[0152] The second preset condition is that the average value of the actual temperature values at each actual viewing angle opening is less than the preset average value, or the decrease value of the actual temperature value within the unit viewing angle opening is less than the preset decrease value, which means that the temperature above the burner is relatively low, or the temperature change in different regions is relatively small.

[0153] When the actual temperature curve simultaneously meets the above first preset condition and the second preset condition, it indicates that the burner is already in the off state at this time, and the range hood can be controlled to turn off.

[0154] In this solution, when no cooking device is placed above the burner, by judging whether the burner is in the off state and controlling the range hood to turn off when the burner is in the off state, unnecessary operation of the range hood can be avoided, thereby saving energy and improving the user experience at the same time.

[0155] In an implementable solution, the control method further includes:

[0156] Before the working power of the range hood is reduced to the third power, generate a first prompt message for reducing the firepower of the stove head.

[0157] And / or,

[0158] When the actual temperature curve meets the first preset condition and does not meet the second preset condition, the control method further includes:

[0159] Generate a second prompt message for controlling the stove head to turn off.

[0160] Specifically, when there is no cooking device placed on the stove head and the stove head is in the high-fire state, first prompt to reduce the firepower of the stove head, and then reduce the working power of the range hood.

[0161] When there is no cooking device placed on the stove head for a long time, but the stove head is still in the firing state, prompt to turn off the stove head.

[0162] In this solution, by generating a message to prompt reducing the firepower or turning off the fire, the interlock control between the range hood and the cooking stove can be realized, thereby improving the user's cooking experience.

[0163] In an implementable solution, the control method further includes:

[0164] When the actual temperature curve does not conform to the change trend of first rising and then falling, obtain the temperature change curve of the actual temperature value above the stove head at a fixed viewing angle opening within the second preset time;

[0165] When the actual temperature value changes periodically within the second preset time, determine that the cooking device on the stove head is in the stir-frying state, and control the working power of the range hood to increase to the fourth power.

[0166] Specifically, control the temperature acquisition device to collect the actual temperature value within a certain period of time at a certain fixed viewing angle opening to obtain a temperature-time curve. When the temperature above the stove head changes periodically within a certain period of time, it indicates that the user is stir-frying, and at this time, the generated oil fume is relatively large, and the working power of the range hood needs to be increased.

[0167] In this solution, by the temperature-time curve, the temperature-viewing angle opening curve can be supplemented, so as to more accurately determine the current actual working scenario of the range hood, and thus adaptively adjust the range hood to the corresponding working mode to achieve a better oil fume suction effect and improve the user's use experience.

[0168] The following uses a specific implementation manner to illustrate the implementation process of the control method of the range hood provided in this embodiment:

[0169] First, construct the "viewpoint - average temperature" curves (i.e., the above - mentioned viewpoint opening - temperature curves) under different scenarios:

[0170] The viewpoints mentioned below refer to the magnitudes of the viewpoint openings of the viewpoints of the above - mentioned temperature acquisition devices (such as 5° etc.).

[0171] Figure 5 It is a schematic diagram of no pot on the stove top. Among them, on the left is high - power heating without a pot, and on the right is low - power heating without a pot.

[0172] Figure 6 It is the "viewpoint - average temperature" curve in a typical high - power heating without a pot (inner and outer ring fires of the stove) scenario. Its average temperature changes with the viewpoint and conforms to a double - peak trend of increasing first, then decreasing, then increasing again, and then decreasing again within a small range. Figure 7 It is the "viewpoint - average temperature" curve in a typical low - power heating without a pot (inner ring fire of the stove) scenario. Its average temperature changes with the viewpoint and conforms to a trend of increasing first and then decreasing within a small range.

[0173] Figure 8 It is a schematic diagram of having a pot on the stove top. Among them, on the left is having a large pot, and on the right is having a small pot. Figure 9 It is the "viewpoint - average temperature" curve in the case of having a large pot. The temperature at the position covered by the pot is averaged by the pot and is relatively stable. The average temperature changes with the viewpoint and conforms to a trend of remaining basically unchanged in a large range and then decreasing. Figure 10 It is the "viewpoint - average temperature" curve in the case of having a small pot. The temperature at the position covered by the pot is averaged by the pot and is relatively stable. The average temperature changes with the viewpoint and conforms to a trend of remaining basically unchanged in a small range and then gradually decreasing. Figure 11 It is the "viewpoint - average temperature" curve in the case of having a small pot and the flame overflowing around the pot. The curve shows a trend of being stable first with the change of the viewpoint, then rising and then falling.

[0174] Figure 12 When the temperature change does not conform to the previous several situations, the fixed viewpoint can be switched to record the periodic temperature change within a period of time (the period should be within the range of normal people's wok - tossing), so as to judge whether it is in the wok - tossing state currently.

[0175] Figure 13 It is the flowchart of the specific control method:

[0176] First, the monitoring device is started, and the temperature sensor is controlled to adjust the viewpoint and operate at a preset frequency to collect the actual temperature values corresponding to different viewpoints and fit the viewpoint - temperature curve.

[0177] When the temperature difference between the maximum and minimum viewing angles is less than or equal to T1, it indicates that the temperatures in different regions above the burner are basically the same, which means the burner is not turned on or has been turned off for some time. In this case, there is no need to turn on the range hood. When the temperature difference between the maximum and minimum viewing angles is greater than T1, it indicates that the cooking appliance is in use and the range hood needs to be started. Then, compare and analyze the actual viewing angle-temperature curve with the viewing angle-temperature curves read under different preset scenarios, match the actual working scenario, and control the range hood to operate in the corresponding working mode.

[0178] Since within the range where there is cookware, the actual temperature value above the burner remains relatively stable while the actual temperature value outside the cookware decreases, when the actual temperature curve conforms to the changing trend of being stable first and then decreasing, it can be determined that there is a cooking appliance placed on the burner corresponding to the temperature acquisition device.

[0179] Judge whether the stable section is greater than the preset value L1; if so, it means that the size of the cookware on the burner is large, and the range hood should be controlled to start or switch to medium - gear operation to work at a relatively high power; if not, it means that the size of the cookware on the burner is small, and the range hood should be controlled to start or switch to low - gear operation to work at a relatively low power.

[0180] When the actual viewing angle - temperature curve does not conform to the changing trend of being stable first and then decreasing, but conforms to the changing trend of rising first and then decreasing, and there are two peaks in the rising stage, it is determined that there is no cooking appliance placed on the burner and the burner is in the high - fire state. At this time, prompt to turn the burner to low - fire and control the range hood to operate in low - gear.

[0181] When the actual viewing angle - temperature curve conforms to the changing trend of rising first and then decreasing, but there are no two peaks in the rising stage, it is determined that there is no cooking appliance placed on the burner and the burner is in the low - fire state. At this time, the user may be going to wash the pot.

[0182] When the burner is in the state of no - pot low - fire, or, after the burner is in the high - fire state and the range hood has been adjusted to low - gear operation, judge whether the curve simultaneously meets the first preset condition and the second preset condition:

[0183] The first preset condition is that the duration for which the curve conforms to the changing trend of rising first and then decreasing is greater than the first preset time t a , which means that the duration during which there is no cooking appliance placed on the burner is relatively long.

[0184] The second preset condition is that the maximum average value is less than the preset average value T a , or, the temperature - decreasing slope is lower than k1, which means that the temperature above the burner is relatively low, or the temperature change in different regions is relatively small.

[0185] When the curve simultaneously meets the above first preset condition and second preset condition, it indicates that the stove head is in the closed state at this time, and the range hood can be controlled to close.

[0186] When there is no cooking equipment placed on the stove head for a long time, but the stove head is still in the firing state, prompt to turn off the stove head.

[0187] When the perspective-temperature curve does not conform to the above situation, control the temperature sensor to switch to a fixed perspective, collect the actual temperature values within a certain period of time, and fit to obtain the time-temperature curve. When the temperature above the stove head shows periodic changes within a certain period of time, it indicates that the user is stir-frying, and the generated oil fume is relatively large at this time, and it is necessary to start or switch the range hood to high gear operation.

[0188] By using an infrared sensor with an adjustable perspective (zoom function), and continuously adjusting the perspective of the sensor at a preset frequency to obtain the perspective-temperature characteristic curve or characteristic map, comparing it with multiple built-in scenarios, and then identifying the corresponding scenario, and complementing it with the periodic characteristics extracted from the temperature-time, it can solve the misjudgment caused by the change of the pot size, the presence or absence of the pot, etc. of the ordinary infrared sensor, realize more accurate and rapid automatic startup or adjustment of the range hood, and better cope with the situation of large fluctuations in oil fume such as stir-frying and washing the pot, improving the user experience.

[0189] The control method of the range hood provided in this embodiment, by setting a temperature acquisition device with a variable perspective opening on the range hood, and controlling the temperature acquisition device to continuously change the perspective opening at a preset frequency to obtain the actual temperature curve, and comparing this curve with the curves of multiple built-in preset working scenarios of the range hood, matching to obtain the current actual working scenario, and supplementing with the temperature-time curve at a fixed perspective opening, more accurately control the switch and gear switching of the range hood, so as to better adapt to the current cooking state, improve the oil fume suction effect, and enhance the user's cooking experience.

[0190] Embodiment 2

[0191] This embodiment provides a control system for a range hood. A temperature acquisition device with a variable perspective opening is provided at a preset position of the range hood, as Figure 14 shown. This control system includes:

[0192] Historical data acquisition module 1, which is used to collect several groups of historical data respectively by using the temperature acquisition device under different preset working scenarios. Each group of historical data includes the historical temperature value above the stove head at a set perspective opening;

[0193] Preset curve fitting module 2, which is used to fit and generate the preset temperature curve of the corresponding preset working scenario based on several groups of historical data under each preset working scenario;

[0194] The actual data acquisition module 3 is used to acquire several groups of actual data in the current working scenario by using a temperature acquisition device. Each group of actual data includes an actual temperature value above the burner head at an actual viewing angle opening;

[0195] The actual curve fitting module 4 is used to fit and generate an actual temperature curve for the current working scenario based on several groups of actual data;

[0196] The working mode control module 5 is used to compare the actual temperature curve with different preset temperature curves, determine the actual working scenario to which the current working scenario belongs based on the comparison result, and control the range hood to work in a working mode matching the actual working scenario.

[0197] In an implementable solution, the temperature acquisition device is arranged at a position on the range hood directly opposite the center of the burner head. The actual data acquisition module 3 is further used for:

[0198] Acquire the first temperature above the burner head by using the minimum viewing angle opening of the temperature acquisition device;

[0199] Taking the connection line between the temperature acquisition device and the edge of the burner head as the maximum viewing angle opening, use the temperature acquisition device to acquire the second temperature above the burner head at the maximum viewing angle opening;

[0200] Judge whether the temperature difference between the first temperature and the second temperature is greater than a preset difference;

[0201] If so, execute the step of fitting and generating an actual temperature curve for the current working scenario based on several groups of actual data;

[0202] If not, determine that the burner head is in the off state and control the range hood to turn off.

[0203] In an implementable solution, the historical data acquisition module 1 is further used to sequentially increase the set viewing angle opening and obtain the historical temperature value above the burner head at each set viewing angle opening to obtain several groups of historical data;

[0204] The preset curve fitting module 2 is further used to fit and generate a preset temperature curve based on several groups of historical data;

[0205] The actual data acquisition module 3 is further used to sequentially increase the actual viewing angle opening and obtain the actual temperature value above the burner head at each actual viewing angle opening to obtain several groups of actual data;

[0206] The actual curve fitting module 4 is further used to fit and generate an actual temperature curve based on several groups of actual data;

[0207] The working mode control module 5 is further used to judge whether the actual temperature curve conforms to the changing trend of being stable first and then decreasing; if so, determine that there is a cooking device placed on the burner head corresponding to the temperature acquisition device.

[0208] In an implementable solution, the working mode control module 5 is further configured to:

[0209] Obtain the corresponding viewing angle opening change value in the temperature stable section of the actual temperature curve;

[0210] Determine whether the viewing angle opening change value is greater than a preset change value;

[0211] If so, determine that the size of the cooking device is greater than the preset size, and control the range hood to work at a first power;

[0212] If not, determine that the size of the cooking device is less than or equal to the preset size, and control the range hood to work at a second power;

[0213] Wherein, the first power is greater than the second power.

[0214] In an implementable solution, the working mode control module 5 is further configured to:

[0215] When the actual temperature curve does not conform to the change trend of first being stable and then decreasing, but conforms to the change trend of first rising and then decreasing, and there are double peaks in the rising stage of the actual temperature curve, determine that there is no cooking device placed on the stove head and the stove head is in the high-fire state, and control the working power of the range hood to be reduced to a third power.

[0216] In an implementable solution, the working mode control module 5 is further configured to:

[0217] After controlling the working power of the range hood to be reduced to the third power, or when there are no double peaks in the rising stage of the actual temperature curve, determine whether the actual temperature curve meets the first preset condition and the second preset condition;

[0218] Wherein, the first preset condition is that the duration for which the actual temperature curve conforms to the change trend of first rising and then decreasing is greater than the first preset time; the second preset condition is that the average value of the actual temperature values at each actual viewing angle opening is less than the preset average value, or the decrease value of the actual temperature value within the unit viewing angle opening is less than the preset decrease value;

[0219] If so, determine that the stove head is in the flame-off state, and control the range hood to be turned off.

[0220] In an implementable solution, as Figure 15 shown, the control system further includes a prompt information generation module 6, which is used for:

[0221] Before controlling the working power of the range hood to be reduced to the third power, generate a first prompt information for reducing the stove head firepower;

[0222] And / or,

[0223] When the actual temperature curve meets the first preset condition and does not meet the second preset condition, the control method further includes:

[0224] Generating a second prompt message for controlling the burner to turn off.

[0225] In an implementable solution, the control system further includes:

[0226] A temperature change curve fitting module 7, configured to obtain a temperature change curve of the actual temperature value above the burner at a fixed viewing angle opening within a second preset time when the actual temperature curve does not conform to the change trend of first rising and then falling;

[0227] The working mode control module 5 is further configured to determine that the cooking device on the burner is in a stir-frying state when the actual temperature value changes periodically within the second preset time, and control the working power of the range hood to increase to a fourth power.

[0228] Since the control system of the range hood provided in this embodiment has the same principle as the control method of the range hood provided in Embodiment 1, it will not be elaborated here.

[0229] The control system of the range hood provided in this embodiment sets a temperature acquisition device with a variable viewing angle opening on the range hood, and controls the temperature acquisition device to continuously change the viewing angle opening at a preset frequency to obtain an actual temperature curve, and compares this curve with the curves of multiple built-in preset working scenarios of the range hood to match the current actual working scenario. At the same time, taking the temperature-time curve at a fixed viewing angle opening as a supplement, it can more accurately control the switch and gear shift of the range hood, so as to better adapt to the current cooking state, improve the oil fume extraction effect, and enhance the user's cooking experience.

[0230] Embodiment 3

[0231] This embodiment provides a range hood, which integrates the control system of the range hood in Embodiment 2.

[0232] The range hood provided in this embodiment, due to integrating the control system of the range hood in Embodiment 2, has better product performance, can more accurately control the switch and gear shift, so as to better adapt to the current cooking state, improve the oil fume extraction effect, and enhance the user's cooking experience.

[0233] Embodiment 4

[0234] This embodiment provides an electronic device, Figure 16 which is a schematic diagram of the modules of the electronic device. The electronic device includes a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, it implements the control method of the range hood in Embodiment 1. Figure 16The displayed electronic device 30 is merely an example and should not impose any limitations on the functions and usage scope of the embodiments of the present disclosure.

[0235] As Figure 16 shown, the electronic device 30 may be presented in the form of a general-purpose computing device. For example, it may be a server device. The components of the electronic device 30 may include, but are not limited to: the at least one processor 31 mentioned above, the at least one memory 32 mentioned above, and a bus 33 that connects different system components (including the memory 32 and the processor 31).

[0236] The bus 33 includes a data bus, an address bus, and a control bus.

[0237] The memory 32 may include volatile memory, such as a random access memory (RAM) 321 and / or a cache memory 322, and may further include a read-only memory (ROM) 323.

[0238] The memory 32 may also include a program / utility 325 having a set (at least one) of program modules 324. Such program modules 324 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 the implementation of a network environment.

[0239] The processor 31 executes various functional applications and data processing by running computer programs stored in the memory 32, such as the control method of the range hood in Embodiment 1 of the present disclosure.

[0240] The electronic device 30 may also communicate with one or more external devices 34 (such as a keyboard, a pointing device, etc.). Such communication may be carried out through an input / output (I / O) interface 35. And, the device 30 for model generation may also communicate with one or more networks (such as a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet) through a network adapter 36. As Figure 16 shown, the network adapter 36 communicates with other modules of the device 30 for model generation through the bus 33. It should be understood that although not shown in the figure, other hardware and / or software modules may be used in combination with the device 30 for model generation, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID (disk array) systems, tape drives, and data backup storage systems, etc.

[0241] It should be noted that although several units / modules or sub-units / modules of the electronic device are mentioned in the above detailed description, this division is merely exemplary and not mandatory. In fact, according to the embodiments of the present disclosure, the features and functions of two or more units / modules described above can be embodied in one unit / modules. Conversely, the features and functions of one unit / modules described above can be further divided and embodied by multiple units / modules.

[0242] Embodiment 5

[0243] This embodiment provides a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, it implements the control method of the range hood in Embodiment 1.

[0244] Among them, the more specific forms that the readable storage medium can adopt may include but are not limited to: portable disks, hard disks, random access memories, read-only memories, erasable programmable read-only memories, optical storage devices, magnetic storage devices, or any suitable combination of the above.

[0245] In a possible implementation manner, the present disclosure can also be implemented in the form of a program product, which includes program code. When the program product runs on a terminal device, the program code is used to enable the terminal device to execute the control method of the range hood in Embodiment 1.

[0246] Among them, the program code for executing the present disclosure can be written in any combination of one or more programming languages. The program code can be executed entirely on the user device, partially on the user device, executed as an independent software package, partially on the user device and partially on a remote device, or entirely on a remote device.

[0247] Although the specific implementation manners of the present disclosure are described above, those skilled in the art should understand that this is only for illustration. The protection scope of the present disclosure is defined by the appended claims. Without departing from the principles and essence of the present disclosure, those skilled in the art can make various changes or modifications to these implementation manners, but these changes and modifications all fall within the protection scope of the present disclosure.

Claims

1. A control method for a range hood, characterized in that, A temperature acquisition device with variable viewing angle opening is provided at a preset position of the range hood, and the control method includes: Under different preset working scenarios, the temperature acquisition device is used to respectively collect several groups of historical data, and each group of the historical data includes a historical temperature value above the stove head at a set viewing angle opening; Based on several groups of the historical data under each preset working scenario, a preset temperature curve corresponding to the preset working scenario is fitted and generated; The temperature acquisition device is used to collect several groups of actual data in the current working scenario, and each group of the actual data includes an actual temperature value above the stove head at an actual viewing angle opening; Based on several groups of the actual data, an actual temperature curve of the current working scenario is fitted and generated; Compare the actual temperature curve with different preset temperature curves, determine the actual working scenario to which the current working scenario belongs based on the comparison result, and control the range hood to work in a working mode matching the actual working scenario.

2. The control method of the range hood according to claim 1, characterized in that, The temperature acquisition device is arranged at a position on the range hood directly opposite the center of the stove head. The step of using the temperature acquisition device to collect several groups of actual data in the current working scenario, where each group of the actual data includes an actual temperature value above the stove head at an actual viewing angle opening, includes: Using the minimum viewing angle opening of the temperature acquisition device, collect the first temperature above the stove head; Taking the connection line between the temperature acquisition device and the edge of the stove head as the maximum viewing angle opening, use the temperature acquisition device to collect the second temperature above the stove head at the maximum viewing angle opening; Judge whether the temperature difference between the first temperature and the second temperature is greater than a preset difference; If so, execute the step of fitting and generating an actual temperature curve of the current working scenario based on several groups of the actual data; If not, determine that the stove head is in the off state, and control the range hood to turn off.

3. The control method of the range hood according to claim 2, characterized in that, The control method further includes: Sequentially increase the set viewing angle opening, and obtain the historical temperature value above the stove head at each set viewing angle opening to obtain several groups of the historical data; Based on several groups of the historical data, fit and generate the preset temperature curve; Sequentially increase the actual viewing angle opening, and obtain the actual temperature value above the stove head at each actual viewing angle opening to obtain several groups of the actual data; Based on several groups of the actual data, fit and generate the actual temperature curve; The step of comparing the actual temperature curve with different preset temperature curves, determining the actual working scenario to which the current working scenario belongs based on the comparison result, and controlling the range hood to work in a working mode matching the actual working scenario includes: Judge whether the actual temperature curve conforms to the changing trend of first being stable and then decreasing; If so, determine that a cooking device is placed on the stove head corresponding to the temperature acquisition device.

4. The control method of the range hood according to claim 3, characterized in that, After the step of determining that a cooking device is placed on the stove head corresponding to the temperature acquisition device, it further includes: Obtain the viewing angle change value corresponding to the temperature stable section in the actual temperature curve; Judge whether the viewing angle change value is greater than a preset change value; If yes, determining that the size of the cooking device is larger than the preset size, and controlling the range hood to operate at the first power; If not, determining that the size of the cooking device is less than or equal to the preset size, and controlling the range hood to operate at a second power; Wherein, the first power is greater than the second power.

5. The control method of the range hood according to claim 3, characterized in that, The control method further comprises: When the actual temperature curve does not conform to the trend of first being stable and then decreasing, but conforms to the trend of first increasing and then decreasing, and the actual temperature curve has double peaks in the rising stage, it is determined that no cooking equipment is placed on the burner and the burner is in a high fire state, and the operating power of the range hood is controlled to be reduced to the third power.

6. The control method of the range hood according to claim 5, characterized in that, The control method further comprises: After the operating power of the range hood is controlled to be reduced to the third power, or when the actual temperature curve does not have double peaks in the rising stage, determining whether the actual temperature curve satisfies the first preset condition and the second preset condition; Among them, the first preset condition is that the actual temperature curve conforms to the trend of first increasing and then decreasing for a duration greater than a first preset time; the second preset condition is that the average value of the actual temperature values ​​under each of the actual viewing angle openings is less than a preset average value, or the drop value of the actual temperature value within a unit viewing angle opening is less than a preset drop value; If so, it is determined that the burner is in an off state, and the range hood is controlled to be turned off.

7. The control method of the range hood according to claim 6, characterized in that, The control method further comprises: Before controlling the working power of the range hood to be reduced to the third power, generating a first prompting message for reducing the fire power of the burner; and / or, When the actual temperature curve satisfies the first preset condition but does not satisfy the second preset condition, the control method further includes: Generate a second prompt message for controlling the furnace head to be closed.

8. The control method of the range hood according to claim 5, characterized in that, The control method further comprises: When the actual temperature curve does not conform to the trend of first increasing and then decreasing, obtaining a temperature change curve of the actual temperature value above the furnace head within a second preset time at a fixed viewing angle; When the actual temperature value changes periodically within the second preset time, it is determined that the cooking device on the stove is in an overturned state, and the operating power of the range hood is controlled to increase to a fourth power.

9. A control system of a range hood, characterized in that, A temperature acquisition device with a variable viewing angle is provided at a preset position of the range hood, and the control system comprises: A historical data collection module, used to collect several groups of historical data respectively using the temperature collection device in different preset working scenarios, each group of historical data including a historical temperature value above the furnace head at a set viewing angle; A preset curve fitting module, used for fitting and generating a preset temperature curve of the corresponding preset working scene based on a plurality of groups of historical data under each preset working scene; An actual data acquisition module, used to use the temperature acquisition device to collect several groups of actual data in the current working scene, each group of actual data includes an actual temperature value above the furnace head at an actual viewing angle; An actual curve fitting module, used for fitting and generating an actual temperature curve of the current working scene based on several groups of actual data; The working mode control module is used to compare the actual temperature curve with different preset temperature curves, determine the actual working scenario to which the current working scenario belongs based on the comparison result, and control the range hood to work in a working mode matching the actual working scenario.

10. An oil fume purifier, characterized in that, The range hood includes the control system of the range hood according to claim 9.

11. An electronic device, comprising a memory, a processor, and a computer program stored on the memory and configured to run on the processor, wherein, When the processor executes the computer program, it implements the control method of the range hood according to any one of claims 1-8.

12. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the control method of the range hood according to any one of claims 1-8.

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