Range hood and its descending control method, system, electronic device, and storage medium

Abstract

The present invention discloses a range hood and its descent control method, system, electronic device, and storage medium. The range hood descent control method includes: obtaining temperature values corresponding to different height zones below the range hood; determining whether the current cooking state interferes with the distance measurement between the range hood and the pot based on the temperature values; if not, obtaining the measured distance between the range hood and the pot using a light detection and ranging sensor, and controlling the range hood to descend based on the measured distance; if so, controlling the range hood to descend to a preset area. The present invention identifies whether the distance measurement between the range hood and the pot is interfered with by using the temperature values corresponding to different height zones below the range hood, thereby more accurately controlling the range hood's descent, preventing collisions between the range hood and the pot caused by interference in distance measurement, and improving the user experience.

Description

Technical Field

[0001] The present invention relates to the technical field of range hoods, and in particular to a range hood and a descent control method, system, electronic equipment, and storage medium thereof. Background Art

[0002] Currently, range hoods with automatic lifting functions on the market have a wide variety of cookware with inconsistent heights. At the same time, because there is no better intelligent control method during the lowering process of the range hood, users are required to manually adjust the height of the range hood. If the user does not operate in time, the range hood will collide with the cookware to a large extent, which reduces the user experience of using the range hood. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the defect in the prior art that the range hood cannot be intelligently adjusted in height, and to provide a range hood and its descent control method, system, and electronic device storage medium.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] The present invention provides a range hood descent control method, the range hood descent control method comprising:

[0006] Obtaining temperature values corresponding to areas at different heights below the range hood;

[0007] determining, based on the temperature value, whether the current cooking state interferes with the distance measurement from the range hood to the cooker;

[0008] If not, obtaining the measured distance from the range hood to the pot through a light detection distance measuring sensor, and controlling the range hood to descend according to the measured distance;

[0009] If so, the range hood is controlled to descend to a preset area.

[0010] Preferably, the step of obtaining the temperature values corresponding to the areas at different heights below the range hood comprises:

[0011] Obtaining a first temperature corresponding to a first area below the range hood, a second temperature corresponding to a second area below the range hood, and a third temperature corresponding to a third area below the range hood;

[0012] wherein the first area is above the second area, and the second area is above the third area;

[0013] The step of determining whether the current cooking state interferes with the measurement of the descending distance according to the temperature value includes:

[0014] It is determined whether a current cooking state interferes with the measurement of the descending distance according to the first temperature, the second temperature, and the third temperature.

[0015] Preferably, the step of determining whether the current cooking state interferes with the measurement of the descent distance based on the first temperature, the second temperature, and the third temperature includes:

[0016] If the difference between the third temperature and the second temperature is greater than or equal to a first threshold, and the difference between the second temperature and the first temperature is less than a second threshold, determining that the current cooking state interferes with the measurement of the descent distance;

[0017] or, if the difference between the third temperature and the second temperature is greater than or equal to the first threshold, and the difference between the second temperature and the first temperature is greater than or equal to the second threshold, it is determined that the current cooking state does not interfere with the measurement of the descent distance;

[0018] Alternatively, if the difference between the third temperature and the second temperature is less than the first threshold, it is determined that the current cooking state does not interfere with the measurement of the descent distance.

[0019] Preferably, the step of controlling the range hood to descend to a preset area includes:

[0020] Determining a preset maximum descent time according to the measured distance;

[0021] Within the preset maximum descending time, when the difference between the second temperature and the first temperature is greater than or equal to a third threshold, controlling the range hood to stop descending;

[0022] or,

[0023] When the actual descent time of the range hood is greater than or equal to the preset maximum descent time, and the difference between the second temperature and the first temperature is less than the third threshold, the range hood is controlled to stop descending and an error signal is sent to the range hood.

[0024] The present invention also provides a range hood descent control system, the range hood descent control system comprising:

[0025] An acquisition module, configured to acquire temperature values corresponding to areas at different heights below the range hood;

[0026] a determination module, configured to determine, based on the temperature value, whether the current cooking state interferes with the measurement of the descending distance;

[0027] The descending module is used to obtain the measured distance from the range hood to the cooker through the light detection and ranging sensor when the determination module determines that the range hood is not, and control the range hood to descend according to the measured distance; and is also used to control the range hood to descend to a preset area when the determination module determines that the range hood is not.

[0028] The present invention further provides a range hood, comprising a range hood body, a controller, and a descending assembly, wherein the range hood body is connected to the descending assembly, and the descending assembly is electrically connected to the controller;

[0029] The descending component receives a descending signal sent by the controller and descends together with the range hood body;

[0030] The controller is configured to:

[0031] Obtaining temperature values corresponding to areas at different heights below the range hood;

[0032] determining, based on the temperature value, whether the current cooking state interferes with the measurement of the descending distance;

[0033] If not, obtaining the measured distance from the range hood to the cooker by a light detection distance measuring sensor, and sending the descending signal to the descending component according to the measured distance to control the range hood to descend;

[0034] If so, the descending signal is sent to the descending component to control the range hood to descend to a preset area.

[0035] Preferably, the controller further comprises a temperature receiving component, and the temperature receiving component receives temperature values corresponding to areas at different heights below the range hood through a temperature interface.

[0036] Preferably, the controller further comprises a signal transmitting component and a distance signal receiving component;

[0037] The signal transmitting component transmits a descending signal to the descending component through a transmitting interface;

[0038] The distance signal receiving component receives the measured distance between the range hood and the cookware fed back by the light detection and ranging sensor through a distance interface.

[0039] Preferably, the controller further comprises an isolation plate and a protective panel; the temperature receiving component, the signal transmitting component and the distance signal receiving component are arranged on the isolation plate, and the isolation plate is provided with through holes corresponding to the temperature interface, the transmitting interface and the distance interface respectively;

[0040] The protective panel is arranged on the outer side of the isolation plate;

[0041] The protective panel and the isolation plate are used to block internal signal transmission of the controller to prevent signal interference inside the controller.

[0042] The present invention also provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the range hood descent control method described above is implemented.

[0043] On the basis of conforming to the common sense in this field, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

[0044] The positive progress effect of the present invention is:

[0045] The present invention identifies whether the distance measurement between the range hood and the cooker is disturbed through the temperature values corresponding to different height areas below the range hood, thereby more accurately controlling the descent of the range hood, preventing the collision between the range hood and the cooker due to interference in the distance measurement, and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 This is a first flow chart of the range hood descent control method according to embodiment 1 of the present invention;

[0047] Figure 2 This is a second flow chart of the range hood descent control method according to embodiment 1 of the present invention;

[0048] Figure 3 This is a third flow chart of the range hood descent control method according to Example 1 of the present invention;

[0049] Figure 4 1 is a flow chart of a specific example of the range hood descent control method according to embodiment 1 of the present invention;

[0050] Figure 5 This is a schematic structural diagram of a range hood descent control system according to embodiment 2 of the present invention;

[0051] Figure 6 This is a first structural schematic diagram of a range hood according to embodiment 3 of the present invention;

[0052] Figure 7 This is a second structural schematic diagram of the range hood according to embodiment 3 of the present invention. DETAILED DESCRIPTION

[0053] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0054] Example 1

[0055] Current range hoods with a lowering function require manual user operation. Due to the wide variety of pots and pans, if the user fails to stop the lowering in time, the range hood may collide with the pot, reducing the user experience. A currently foreseeable approach is to equip the range hood with a light detection and ranging sensor. The light detection and ranging sensor uses an algorithm to detect the time it takes for the signal to be reflected from the pot to the receiving end, determine the distance between the range hood and the pot, and thus control the range hood's descent. However, this technology cannot avoid interference from water vapor generated during the cooking process. The signal emitted by the light detection and ranging sensor's transmitter encounters water vapor during transmission and is refracted on the water vapor surface. The signal reflected by the water vapor reaches the light detection and ranging sensor's receiver, interfering with the sensor's detection, making it impossible to effectively control the range hood's descent, and causing the range hood to collide with the pot.

[0056] This embodiment provides a range hood descent control method, see Figure 1 , the range hood descent control method includes:

[0057] S1. Obtain temperature values corresponding to areas at different heights below the range hood.

[0058] S2. Determine whether the current cooking state interferes with the distance measurement between the range hood and the cooker based on the temperature value. If so, proceed to step S4; if not, proceed to step S3.

[0059] In an alternative embodiment, see Figure 2 , step S1 includes:

[0060] S11. Obtain a first temperature corresponding to a first area below the range hood, a second temperature corresponding to a second area below the range hood, and a third temperature corresponding to a third area below the range hood.

[0061] The first area is above the second area, and the second area is above the third area.

[0062] Step S2 includes:

[0063] S21. Determine whether the current cooking state interferes with the measurement of the descent distance based on the first temperature, the second temperature, and the third temperature.

[0064] In an optional embodiment, step S21 includes:

[0065] If the difference between the third temperature and the second temperature is greater than or equal to the first threshold, and the difference between the second temperature and the first temperature is less than the second threshold, step S211 is executed.

[0066] S211. Determine whether the current cooking state interferes with the measurement of the descending distance.

[0067] In an optional embodiment, step S21 further includes:

[0068] If the difference between the third temperature and the second temperature is greater than or equal to the first threshold, and the difference between the second temperature and the first temperature is greater than or equal to the second threshold, step S212 is executed.

[0069] S212: Determine whether the current cooking state interferes with the measurement of the descending distance.

[0070] In an optional embodiment, step S21 further includes:

[0071] If the difference between the third temperature and the second temperature is less than the first threshold, step S213 is executed.

[0072] S213: Determine whether the current cooking state interferes with the measurement of the descending distance.

[0073] For example, the temperature values of the first area, the second area, and the third area are obtained by three temperature sensors, respectively. 上 、T 中 and T 下 .

[0074] When T 下 -T 中 ≥50*t and when T 中 -T 上 When <30*t (where t represents the preset minimum temperature unit, for example, t can be set to 1 degree Celsius, 50*t is the first threshold, and 30*t is the second threshold), the temperature change gradient at the bottom of the range hood is large, and the temperature difference between the middle and upper temperature detection areas is small or there is no temperature difference. It is determined that cooking in the current state generates water vapor, and the water vapor causes a small temperature difference between the middle and upper parts of the range hood, that is, it is determined that the current cooking state interferes with the measurement of the descent distance.

[0075] When T 下 -T 中 ≥50*t and T 中 -T 上 When ≥30*t, there is an obvious temperature gradient in the temperature detection areas at different heights of the range hood, indicating that no water vapor is generated during cooking in the current state. It is determined that the current cooking state does not interfere with the measurement of the descent distance.

[0076] When T 下 -T 中 When <50*t, it means that cooking has just started or has not started yet. In this state, no cooking smoke or steam is generated. It is determined that the current cooking state does not interfere with the measurement of the descent distance.

[0077] In this embodiment, since water vapor will affect the detection of the light detection and ranging sensor, the temperature of the upper, middle and bottom parts of the range hood is used to determine whether water vapor is generated in the current cooking state, and then to determine whether the current cooking state interferes with the measurement of the descent distance.

[0078] S3. Obtain the measured distance between the range hood and the cooker through a light detection distance measuring sensor, and control the range hood to descend according to the measured distance.

[0079] S4. Control the range hood to descend to the preset area.

[0080] In this embodiment, whether the distance measurement from the range hood to the cooker is disturbed is identified by using the temperature values corresponding to different height areas below the range hood, thereby more accurately controlling the descent of the range hood, preventing the collision between the range hood and the cooker due to interference in the distance measurement, and improving the user experience.

[0081] In an alternative embodiment, see Figure 3 , step S4 includes:

[0082] S41. Determine a preset maximum descent time based on the measured distance. If, within the preset maximum descent time, the difference between the second temperature and the first temperature is greater than or equal to a third threshold, proceed to step S42. If, when the actual descent time of the range hood is greater than or equal to the preset maximum descent time, and the difference between the second temperature and the first temperature is less than the third threshold, proceed to step S43.

[0083] S42, controlling the range hood to stop descending.

[0084] S43: Control the range hood to stop descending and send an error signal to the range hood.

[0085] For example, if it is determined that cooking is generating steam, thus interfering with the measured descent distance, the range hood is intelligently controlled to descend. First, the unit descent time required for the range hood to descend is set per unit of distance. Next, the control counter (CNT) begins counting. The count represents the accumulated unit descent time, i.e., the total descent time of the range hood.

[0086] During the counting process (i.e. within the preset maximum drop time), when T 中 -T 上 When the value of the counter is greater than or equal to the preset value (i.e., when the actual descent time of the range hood is greater than or equal to the preset maximum descent time), T 中 -T 上When the time is less than 30*t, the range hood does not receive a valid signal, the range hood is controlled to stop descending, and an error signal is sent to the range hood.

[0087] In this embodiment, the preset area where the range hood stops descending is determined by presetting the maximum descent time and the temperature gradient of different height areas below the range hood, thereby preventing the range hood and the cooker from colliding due to measurement interference, invalid signals, etc., thereby improving the user experience.

[0088] The following describes a specific example of a range hood descent control method. For a specific flowchart, see Figure 4 .

[0089] S401: Initialize the range hood system.

[0090] S402, obtain the temperature values (T 上 、T 中 and T 下 ), and store the three temperature values in a fixed data storage area.

[0091] S403: Determine whether the intelligent automatic descent function is activated. If activated, execute step S404; if not activated, return to step S402.

[0092] S404: Determine whether there is interference caused by cooking (such as water vapor or oil smoke). If yes, execute step S405; if not, execute step S412.

[0093] S405. The counter starts counting (represented by CNT++).

[0094] S406, determine T 中 -T 上 ≥30*t (30*t is the second threshold), if not, execute step S407, if so, execute step S409.

[0095] S407. Determine whether the count value of the counter (ie, CNT) is greater than or equal to the preset value A (ie, determine whether the actual descent time of the range hood is greater than or equal to the preset maximum descent time). If so, execute step S408; if not, return to step S405.

[0096] S408, output the descending stop signal and abnormal data (ie, the range hood does not receive a valid signal, controls the range hood to stop descending, and sends an error signal to the range hood), and execute step S411.

[0097] S409 : The counter CNT stops counting and is reset to zero, that is, CNT==0.

[0098] S410: Output the descending stop data (including the distance measured by the light detection and ranging sensor to control the range hood to descend to a height suitable for the cooker).

[0099] S411. The range hood control board receives the data output in step S410, controls the actuator to execute, controls the descending assembly to descend together with the range hood, and ends the process.

[0100] S412: The counter starts counting (represented by CNT++).

[0101] S413: Determine whether the range hood receives a valid ranging signal sent by the light detection and ranging sensor. If so, execute step S409; if not, execute step S414.

[0102] S414. Determine whether the count value of the counter (ie, CNT) is greater than or equal to the preset value A (ie, determine whether the actual descent time of the range hood is greater than or equal to the preset maximum descent time). If so, execute step S408; if not, return to step S412.

[0103] The specific steps of determining the cooking interference signal in step S404 are as follows:

[0104] S4041, T 上 、T 中 and T 下 The three temperature data are processed.

[0105] S4042, determine whether T 下 -T 中 ≥50*t (50*t is the first threshold), if yes, execute step S4043, if no, execute step S4044.

[0106] S4043, determine whether T 中 -T 上 ≥30*t (30*t is the second threshold), if yes, execute step S4045, if no, execute step S4046.

[0107] S4044: Determine whether cooking has just started or has not yet started, and execute step S4047.

[0108] S4045. Determine that cooking has started, and execute step S4047.

[0109] S4046. Determine whether there is interference from cooking (steam or smoke).

[0110] S4047. Determine that there is no interference caused by cooking.

[0111] Example 2

[0112] This embodiment provides a range hood descent control system. Figure 5 , the range hood descent control system includes:

[0113] Acquisition module 1, used to obtain temperature values corresponding to areas at different heights below the range hood;

[0114] Determination module 2, for determining whether the current cooking state interferes with the measurement of the descending distance according to the temperature value;

[0115] The descending module 3 is used to obtain the measured distance from the range hood to the pot through the light detection and ranging sensor when the determination module 2 determines that the answer is no, and control the range hood to descend according to the measured distance; it is also used to control the range hood to descend to a preset area when the determination module 2 determines that the answer is yes.

[0116] In an optional embodiment, the acquisition module 1 is also used to obtain a first temperature corresponding to the first area below the range hood, a second temperature corresponding to the second area, and a third temperature corresponding to the third area; wherein the first area is above the second area, and the second area is above the third area.

[0117] The determination module 2 is further configured to determine whether the current cooking state interferes with the measurement of the descending distance based on the first temperature, the second temperature, and the third temperature.

[0118] In an optional embodiment, the determination module 2 is further used to determine that the current cooking state interferes with the measurement of the descent distance if the difference between the third temperature and the second temperature is greater than or equal to the first threshold, and the difference between the second temperature and the first temperature is less than the second threshold.

[0119] The determination module 2 is further configured to determine that the current cooking state does not interfere with the measurement of the descent distance if the difference between the third temperature and the second temperature is greater than or equal to a first threshold, and the difference between the second temperature and the first temperature is greater than or equal to a second threshold.

[0120] The determination module 2 is further configured to determine that the current cooking state does not interfere with the measurement of the descent distance if the difference between the third temperature and the second temperature is less than a first threshold.

[0121] In an optional embodiment, the determination module 2 is further configured to determine a preset maximum descent time according to the measured distance;

[0122] The descending module 3 is further configured to control the range hood to stop descending when the difference between the second temperature and the first temperature is greater than or equal to a third threshold value within a preset maximum descending time.

[0123] The descending module 3 is also used to control the range hood to stop descending and send an error signal to the range hood when the actual descending time of the range hood is greater than or equal to the preset maximum descending time and the difference between the second temperature and the first temperature is less than the third threshold.

[0124] It should be noted that the implementation principles and technical effects of each module of the range hood descent control system of this embodiment can be referred to Example 1 and will not be repeated here.

[0125] Example 3

[0126] This embodiment provides a range hood, which includes a range hood body, a controller and a descending assembly. The range hood body is connected to the descending assembly, and the descending assembly is electrically connected to the controller.

[0127] The descending component receives the descending signal sent by the controller and descends together with the range hood body.

[0128] The controller is configured as:

[0129] Obtain the temperature values corresponding to different height areas below the range hood; determine whether the current cooking state interferes with the measurement of the descent distance based on the temperature values; if not, obtain the measured distance from the range hood to the pot through the light detection and ranging sensor, and send a descent signal to the descent component based on the measured distance to control the range hood to descend; if so, send a descent signal to the descent component to control the range hood to descend to the preset area.

[0130] In an alternative embodiment, see Figure 6 The controller 10 further includes a temperature receiving component, which receives temperature values corresponding to areas at different heights below the range hood through a temperature interface 13 .

[0131] In an alternative embodiment, see Figure 6 The controller 10 further includes a signal transmitting component and a distance signal receiving component; the signal transmitting component transmits a descending signal to the descending component through the transmitting interface 11.

[0132] The distance signal receiving component receives the measured distance between the range hood and the cooker fed back by the light detection and ranging sensor through the distance interface 12 .

[0133] In an alternative embodiment, see Figure 6 The controller 10 also includes an isolation plate and a protective panel; the temperature receiving component, the signal transmitting component and the distance signal receiving component are arranged on the isolation plate, and the isolation plate is provided with through holes, which correspond to the temperature interface 13, the transmitting interface 11 and the distance interface 12 respectively.

[0134] The protective panel is arranged on the outer side of the isolation plate.

[0135] The protective panel and the isolation plate are used to block the internal signal transmission of the controller 10 to prevent signal interference inside the controller 10.

[0136] The following is a specific example of a range hood. Figure 7 Schematic diagram of the structure of an example range hood.

[0137] The range hood with lifting function includes a lifting mechanism (i.e., a descending component), a range hood body and a controller. The controller includes a transmitting interface, a distance interface, a temperature interface, a protective panel 14, an isolation plate 15, a circuit substrate 16, a sensor housing 17 and a data processing unit. Among them, the signal transmitting component 111, the distance signal receiving component 121, and the temperature receiving component 131 are electrically connected to the circuit substrate 16, and the signal transmitting component 111, the distance signal receiving component 121, and the temperature receiving component 131 are located on the same side of the circuit substrate 16. The temperature receiving component 131 installed at each receiving port is the same component, and the circuit substrate 16 is placed in the sensor housing 17; an isolation plate 15 is installed on the same side as the signal transmitting component 111, the distance signal receiving component 121, and the temperature receiving component 131. The isolation plate 15 is used to prevent the signal emitted by the signal transmitting component 111 from being transmitted through the inside of the sensor to the end of the distance signal receiving component 121, causing signal interference. At the same time, through holes corresponding to the transmitting interface, distance interface, and temperature interface are opened on the isolation plate 15 for transmitting or receiving external valid signals, wherein the through holes corresponding to the transmitting interface and temperature interface are flat rectangular in shape; a protective panel 14 is installed on the outside of the isolation plate 15, and the through hole and the panel are designed to have an interference fit to block the transmission of internal signals of the sensor. During the installation of the controller, the protective panel 14 is perpendicular to the horizontal plane and the temperature interface is located below the transmitting interface and the distance interface; if the controller is installed on the inclined surface of the range hood, the slope of the through hole in the isolation plate 15 needs to be adjusted according to the inclination angle to ensure that the through hole in the isolation plate 15 is rectangular and keeps in contact with the protective panel 14, so that the signal can effectively reach the space to be detected above the burner.

[0138] Example 4

[0139] This embodiment provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the range hood descent control method of embodiment 1 is implemented.

[0140] The readable storage medium may include, but is not limited to, a portable disk, a hard disk, a random access memory, a read-only memory, an erasable programmable read-only memory, an optical storage device, a magnetic storage device, or any suitable combination thereof.

[0141] In a possible implementation manner, the present invention may also be implemented in the form of a program product, which includes program code. When the program product is run on a terminal device, the program code is used to enable the terminal device to execute the range hood descent control method of Example 1.

[0142] The program code for executing the present invention may be written in any combination of one or more programming languages, and may be executed entirely on the user device, partially on the user device, as a standalone software package, partially on the user device and partially on a remote device, or entirely on the remote device.

[0143] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of the present invention.

Claims

1. A range hood descent control method, characterized in that: The range hood descent control method includes: Obtaining temperature values corresponding to areas at different heights below the range hood; determining, based on the temperature value, whether the current cooking state interferes with the distance measurement from the range hood to the cooker; If not, obtaining the measured distance from the range hood to the pot through a light detection distance measuring sensor, and controlling the range hood to descend according to the measured distance; If yes, control the range hood to descend to a preset area; The step of obtaining temperature values corresponding to areas at different heights below the range hood comprises: Obtaining a first temperature corresponding to a first area below the range hood, a second temperature corresponding to a second area below the range hood, and a third temperature corresponding to a third area below the range hood; wherein the first area is above the second area, and the second area is above the third area; The step of determining whether the current cooking state interferes with the measurement of the descending distance according to the temperature value includes: determining, based on the first temperature, the second temperature, and the third temperature, whether a current cooking state interferes with measuring a descending distance; The step of determining whether the current cooking state interferes with the measurement of the descent distance based on the first temperature, the second temperature, and the third temperature includes: If the difference between the third temperature and the second temperature is greater than or equal to a first threshold, and the difference between the second temperature and the first temperature is less than a second threshold, determining that the current cooking state interferes with the measurement of the descent distance; or, if the difference between the third temperature and the second temperature is greater than or equal to the first threshold, and the difference between the second temperature and the first temperature is greater than or equal to the second threshold, it is determined that the current cooking state does not interfere with the measurement of the descent distance; Alternatively, if the difference between the third temperature and the second temperature is less than the first threshold, it is determined that the current cooking state does not interfere with the measurement of the descent distance.

2. The range hood descent control method according to claim 1, wherein: The step of controlling the range hood to descend to a preset area includes: Determining a preset maximum descent time according to the measured distance; Within the preset maximum descending time, when the difference between the second temperature and the first temperature is greater than or equal to a third threshold, controlling the range hood to stop descending; or, When the actual descent time of the range hood is greater than or equal to the preset maximum descent time, and the difference between the second temperature and the first temperature is less than the third threshold, the range hood is controlled to stop descending and an error signal is sent to the range hood.

3. A range hood descent control system, characterized in that: The range hood descent control system includes: An acquisition module, configured to acquire temperature values corresponding to areas at different heights below the range hood; a determination module, configured to determine, based on the temperature value, whether the current cooking state interferes with the measurement of the descending distance; a descending module, configured to, when the determination module determines that the range hood is not, obtain the measured distance between the range hood and the cookware through a light detection and ranging sensor, and control the range hood to descend according to the measured distance; and, when the determination module determines that the range hood is yes, control the range hood to descend to a preset area; The acquisition module is further configured to acquire a first temperature corresponding to a first area below the range hood, a second temperature corresponding to a second area below the range hood, and a third temperature corresponding to a third area below the range hood; wherein the first area is above the second area, and the second area is above the third area; The determining module is further configured to determine whether a current cooking state interferes with the measurement of the descending distance based on the first temperature, the second temperature, and the third temperature; The determining module is further configured to determine that the current cooking state interferes with the measurement of the descent distance if the difference between the third temperature and the second temperature is greater than or equal to a first threshold, and the difference between the second temperature and the first temperature is less than a second threshold; or, if the difference between the third temperature and the second temperature is greater than or equal to the first threshold, and the difference between the second temperature and the first temperature is greater than or equal to the second threshold, it is determined that the current cooking state does not interfere with the measurement of the descent distance; Alternatively, if the difference between the third temperature and the second temperature is less than the first threshold, it is determined that the current cooking state does not interfere with the measurement of the descent distance.

4. A range hood, characterized in that: The range hood comprises a range hood body, a controller and a descending assembly, wherein the range hood body is connected to the descending assembly, and the descending assembly is electrically connected to the controller; The descending component receives a descending signal sent by the controller and descends together with the range hood body; The controller is configured to: Obtaining temperature values corresponding to areas at different heights below the range hood; determining, based on the temperature value, whether the current cooking state interferes with the measurement of the descending distance; If not, obtaining the measured distance from the range hood to the cooker by a light detection distance measuring sensor, and sending the descending signal to the descending component according to the measured distance to control the range hood to descend; If yes, the descending signal is sent to the descending component to control the range hood to descend to a preset area; The step of obtaining temperature values corresponding to areas at different heights below the range hood comprises: Obtaining a first temperature corresponding to a first area below the range hood, a second temperature corresponding to a second area below the range hood, and a third temperature corresponding to a third area below the range hood; wherein the first area is above the second area, and the second area is above the third area; The step of determining whether the current cooking state interferes with the measurement of the descending distance according to the temperature value includes: Determining whether a current cooking state interferes with measuring a descending distance based on the first temperature, the second temperature, and the third temperature; the step of determining whether a current cooking state interferes with measuring a descending distance based on the first temperature, the second temperature, and the third temperature includes: If the difference between the third temperature and the second temperature is greater than or equal to a first threshold, and the difference between the second temperature and the first temperature is less than a second threshold, determining that the current cooking state interferes with the measurement of the descent distance; or, if the difference between the third temperature and the second temperature is greater than or equal to the first threshold, and the difference between the second temperature and the first temperature is greater than or equal to the second threshold, it is determined that the current cooking state does not interfere with the measurement of the descent distance; Alternatively, if the difference between the third temperature and the second temperature is less than the first threshold, it is determined that the current cooking state does not interfere with the measurement of the descent distance.

5. The range hood according to claim 4, wherein: The controller further includes a temperature receiving component, which receives temperature values corresponding to areas at different heights below the range hood through a temperature interface.

6. The range hood according to claim 5, wherein: The controller also includes a signal transmitting component and a distance signal receiving component; The signal transmitting component transmits a descending signal to the descending component through a transmitting interface; The distance signal receiving component receives the measured distance between the range hood and the cookware fed back by the light detection and ranging sensor through a distance interface.

7. The range hood according to claim 6, wherein: The controller further includes an isolation plate and a protective panel; the temperature receiving component, the signal transmitting component, and the distance signal receiving component are arranged on the isolation plate, and the isolation plate is provided with through holes corresponding to the temperature interface, the transmitting interface, and the distance interface, respectively; The protective panel is arranged on the outer side of the isolation plate; The protective panel and the isolation plate are used to block internal signal transmission of the controller to prevent signal interference inside the controller.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the range hood descent control method according to any one of claims 1 to 3 is implemented.

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