Range hood cleaning reminder method, device and range hood

Abstract

The present application relates to a range hood cleaning reminder method, device and range hood, the method comprising: monitoring whether the state of the range hood meets the preset cleaning detection conditions; when the state of the range hood meets the cleaning detection conditions, controlling the sound wave transmitting device to transmit sound waves to the impeller of the range hood; obtaining the sound wave frequency obtained by the sound wave receiving device according to the sound wave detection transmitted by the impeller; when the sound wave frequency is greater than or equal to the preset frequency limit value, outputting cleaning reminder information. The degree of adhesion of oil stains can be more accurately judged by sound waves, and feedback can be given to the user whether cleaning is needed based on the degree of use of the range hood and the amount of oil stains accumulated, so that the user can clean the oil stains at a more effective time node, effectively improving the accuracy of the cleaning reminder of the range hood.

Description

Technical Field

[0001] The present application relates to the technical field of intelligent devices, and in particular to a range hood cleaning reminder method, device and range hood. Background Art

[0002] With the development of science and technology and the continuous progress of society, people's living standards are getting higher and higher. Range hoods have become an indispensable kitchen appliance in modern family cooking, and every household uses them every day. After the range hood has been used for a period of time, the impeller and the inside of the volute in the suction and exhaust system will absorb a lot of oil stains due to the contact with the oil smoke during use. The longer the time, the more difficult it is to clean the oil stains. This requires professional cleaning personnel to regularly disassemble the machine for comprehensive cleaning, which takes a lot of time and money and causes great inconvenience. If the inner cavity is not cleaned for a long time, the load in the suction and exhaust system will increase, and the performance indicators will decrease, which is specifically reflected in the decrease in suction and increased noise. In particular, the oil stains on the impeller, if not cleaned in time, will have a great impact on the performance of the range hood. In addition to the decline in performance, the accumulation of oil stains breeds bacteria, and the residual odor seriously affects the health of users.

[0003] Traditional range hoods with a cleaning function use timers to remind users that the cleaning cycle has arrived. However, the amount of oil accumulated in the range hoods of different users is different. This reminder method is very limited and cannot give users accurate feedback to clean the range hood. It has the disadvantage of low accuracy of cleaning reminders. Summary of the invention

[0004] Based on this, it is necessary to provide a range hood cleaning reminder method, device and range hood to address the problem of low accuracy of cleaning reminders in traditional range hoods with cleaning functions, which can effectively improve the accuracy of cleaning reminders.

[0005] A range hood cleaning reminder method, comprising:

[0006] Monitor whether the status of the range hood meets the preset cleaning test conditions;

[0007] When the state of the range hood meets the cleaning detection condition, controlling the sound wave emitting device to emit sound waves to the impeller of the range hood;

[0008] Acquiring a sound wave frequency detected by a sound wave receiving device according to the sound wave transmitted by the impeller;

[0009] When the sound wave frequency is greater than or equal to a preset frequency limit value, a cleaning reminder message is output.

[0010] In one embodiment, the cleaning detection condition includes: the range hood is not in working state.

[0011] In one embodiment, the cleaning detection condition includes: the range hood is not in working state and receives an active detection instruction.

[0012] In one embodiment, the controlling the sound wave emitting device to emit sound waves to the impeller of the range hood comprises:

[0013] After the telescopic rod is controlled to extend to bring the sound wave emitting device close to the impeller, the sound wave emitting device is controlled to emit sound waves of a fixed frequency to the impeller of the range hood; wherein the sound wave emitting device is fixed to the inner wall of the volute of the range hood through the telescopic rod.

[0014] In one embodiment, the sound wave receiving device obtains the sound wave frequency detected by the sound wave transmitted by the impeller, including:

[0015] After the telescopic rod is controlled to extend and the sound wave receiving device is pressed against the impeller, the sound wave frequency obtained by the sound wave receiving device according to the sound wave detection transmitted by the impeller is received; wherein, the sound wave receiving device is fixed to the inner wall of the volute of the range hood through the telescopic rod.

[0016] In one embodiment, the sound wave receiving device and the sound wave transmitting device are respectively located on opposite sides of the impeller.

[0017] A range hood cleaning reminder device, comprising:

[0018] A status monitoring module is used to monitor whether the status of the range hood meets the preset cleaning detection conditions;

[0019] A detection control module, used for controlling the sound wave emitting device to emit sound waves to the impeller of the range hood when the state of the range hood meets the cleaning detection condition;

[0020] A data receiving module, used for acquiring the sound wave frequency detected by the sound wave receiving device according to the sound wave transmitted by the impeller;

[0021] The cleaning reminder module is used to output cleaning reminder information when the sound wave frequency is greater than or equal to a preset frequency limit value.

[0022] A range hood comprises an impeller, a volute, a motor, a sound wave transmitting device, a sound wave receiving device and a control device. The control device is connected to the sound wave transmitting device and the sound wave receiving device and is used to perform range hood cleaning reminder control according to the above method.

[0023] In one embodiment, the range hood further includes a telescopic rod, the sound wave emitting device is fixed to the inner wall of the volute via the telescopic rod, the sound wave receiving device is fixed to the inner wall of the volute via the telescopic rod, and the sound wave receiving device and the sound wave emitting device are respectively located on opposite sides of the impeller.

[0024] In one embodiment, the range hood further includes a slide rail and a storage box arranged on the inner wall of the volute, the storage box is used to place the sound wave receiving device and the sound wave emitting device, and the slide rail is used to make the sound wave receiving device and the sound wave emitting device slide into or out of the volute.

[0025] The above-mentioned range hood cleaning reminder method, device and range hood, when monitoring that the state of the range hood meets the cleaning detection conditions, transmits sound waves to the impeller of the range hood through the sound wave transmitting device, and obtains the sound wave frequency obtained by the sound wave receiving device according to the sound wave detection transmitted by the impeller, and outputs the cleaning reminder information when the sound wave frequency is greater than or equal to the preset frequency limit value. The degree of adhesion of oil stains can be more accurately judged by sound waves, and feedback can be given to the user whether cleaning is needed based on the degree of use of the range hood and the amount of oil stains accumulated, so that the user can clean the oil stains at a more effective time node, effectively improving the accuracy of the cleaning reminder of the range hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a flow chart of a range hood cleaning reminder method in one embodiment;

[0027] Figure 2 is a structural block diagram of a range hood cleaning reminder device in one embodiment;

[0028] Figure 3 is a structural front view of a range hood in one embodiment;

[0029] Figure 4 is a top view of a structural section of a range hood in one embodiment;

[0030] Figure 5 for Figure 3 Enlarged schematic diagram of the center range hood A;

[0031] Figure 6 This is a schematic diagram of the working principle of a range hood in one embodiment;

[0032] Figure 7 Schematic diagram of the operating functions of a control panel of a range hood in one embodiment. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0035] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element, or connected to the other element through an intermediate element. The "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0036] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the terms used in this specification include any and all combinations of the relevant listed items.

[0037] In one embodiment, a range hood cleaning reminder method is provided, which is applicable to a range hood inner cavity cleaning reminder, such as Figure 1 As shown, the method includes:

[0038] Step S110: monitoring whether the state of the range hood meets the preset cleaning detection conditions.

[0039] The specific content of the cleaning detection condition is not unique and can be set according to the actual state. Specifically, the state of the range hood can be monitored by the control device, such as whether the range hood is working and whether the cleaning instruction sent by the user is received. The control device can be a separate controller or the original controller of the range hood. If the state of the range hood is monitored to meet the cleaning detection condition, the subsequent steps are executed to start the sound wave detection device to detect whether a cleaning reminder is needed; if the state of the range hood is monitored not to meet the cleaning detection condition, the sound wave detection device is not started.

[0040] In one embodiment, the cleaning detection condition includes: the range hood is not in working state. Specifically, the control device monitors the state of the range hood, and after detecting that the range hood has finished working and is in standby state, the cleaning detection process can be automatically started to analyze whether it is necessary to remind the user to clean.

[0041] In another embodiment, the cleaning detection condition includes: the range hood is not in working state and an active detection instruction is received. Correspondingly, the state of the range hood is monitored by the control device. When the range hood has finished working and is in standby state, the user can send an active detection instruction to the control device through the detection button on the touch screen of the range hood, actively start the cleaning detection process, and analyze whether a cleaning reminder is needed. It can be understood that if the range hood receives an active detection instruction when it is in working state, it is determined that the user accidentally touches the detection button when using the range hood, and the active detection action is not performed.

[0042] Step S120: When the state of the range hood meets the cleaning detection condition, the sound wave emitting device is controlled to emit sound waves to the impeller of the range hood.

[0043] Specifically, the sound wave detection device includes a sound wave transmitting device and a sound wave receiving device. When the control device detects that the state of the range hood meets the cleaning detection conditions, the control device controls the sound wave transmitting device to start working and transmit sound waves to the impeller of the range hood. The sound wave transmitting device can be set on the inner wall of the volute of the range hood, or it can be directly set on the impeller. It can be understood that if the state of the range hood does not meet the cleaning detection conditions, the cleaning detection process will not be started, and the control device will not control the sound wave transmitting device to work.

[0044] Step S130: Acquire the sound wave frequency detected by the sound wave receiving device based on the sound wave transmitted by the impeller.

[0045] The sound wave receiving device can also be arranged on the inner wall of the volute of the range hood, or directly on the impeller. While controlling the sound wave transmitting device to emit sound waves, the control device also controls the sound wave receiving device to start. After the sound wave receiving device is started, it receives the sound waves transmitted by the impeller and performs detection and analysis to obtain the sound wave frequency and then sends it to the control device.

[0046] Step S140: When the sound wave frequency is greater than or equal to a preset frequency limit value, a cleaning reminder message is output.

[0047] The specific value of the frequency limit is not unique, and can be determined based on the frequency of the sound waves emitted by the sound wave transmitting device and the distance the sound waves are transmitted in the impeller. Specifically, when there is no oil on the impeller surface, the frequency received by the sound wave receiving device will be in a fixed small range. When there is oil on the impeller surface, and with continuous use, the degree of oil adhesion continues to increase, and the frequency of the received sound waves will also change according to a certain trend. When a critical value (ie, the frequency limit) is reached, it means that the degree of oil adhesion has reached a level that requires cleaning, and the control device will feedback information to the user to remind the user to clean. If the sound wave frequency is less than the frequency limit, no cleaning reminder is required.

[0048] It is understandable that there is not only one way to output the cleaning reminder information. The control device may control the indicator on the touch screen of the range hood to flash to remind the user to clean the oil stains on the impeller and the volute. The control device may also control the pattern set on the touch screen of the range hood to light up, or make a voice announcement through a speaker, etc., to remind the user that the impeller and the volute of the range hood need to be cleaned. In addition, the control device may also display the sound wave frequency obtained by analysis through the touch screen and feed it back to the user for viewing.

[0049] The above range hood cleaning reminder method, when monitoring that the state of the range hood meets the cleaning detection conditions, transmits sound waves to the impeller of the range hood through the sound wave transmitting device, and obtains the sound wave frequency obtained by the sound wave receiving device according to the sound wave detection transmitted by the impeller, and outputs the cleaning reminder information when the sound wave frequency is greater than or equal to the preset frequency limit value. The degree of adhesion of oil stains can be more accurately judged by sound waves, and feedback can be given to the user whether cleaning is needed based on the degree of use of the range hood and the amount of oil stains accumulated, so that the user can clean the oil stains at a more effective time node, effectively improving the accuracy of the cleaning reminder of the range hood.

[0050] In one embodiment, controlling the sound wave emitting device to emit sound waves to the impeller of the range hood in step S120 includes: controlling the telescopic rod to extend to bring the sound wave emitting device close to the impeller, and then controlling the sound wave emitting device to emit sound waves of a fixed frequency to the impeller of the range hood. The sound wave emitting device is fixed to the inner wall of the volute of the range hood through the telescopic rod.

[0051] Specifically, the telescopic rod is installed on the inner wall of the volute of the range hood. When cleaning and detection are not required, the telescopic rod is in a retracted state. When cleaning and detection are required, the control device controls the telescopic rod to extend to bring the sound wave emitting device close to the impeller, and then controls the sound wave emitting device to emit sound waves of a fixed frequency to the impeller, so that the sound waves can be transmitted along the surface of the impeller, thereby better performing detection and improving detection accuracy.

[0052] The specific frequency of the sound waves emitted by the sound wave emitting device is not unique either. It only needs to remain unchanged during the detection process so as to facilitate subsequent detection of whether there is oil on the impeller. The distance between the sound wave emitting device and the impeller when the telescopic rod is in a retracted state can be measured in advance and saved in the control device. After the control device controls the extension length of the telescopic rod to reach the saved distance value, it is considered that the sound wave emitting device is in close contact with the impeller. In addition, the control device can also detect the resistance encountered by the extension of the telescopic rod. When the resistance is greater than the set resistance threshold, it can be considered that the sound wave emitting device is in close contact with the impeller.

[0053] Further, in one embodiment, step S130 includes: controlling the telescopic rod to extend to bring the sound wave receiving device close to the impeller, and receiving the sound wave frequency detected by the sound wave receiving device according to the sound wave transmitted by the impeller. The sound wave receiving device is fixed to the inner wall of the volute of the range hood through the telescopic rod.

[0054] Similarly, the telescopic rod supporting the sound wave receiving device can also be installed on the inner wall of the volute of the range hood, and be in a retracted state when cleaning and detection are not required. When cleaning and detection are required, the controller can synchronously control the telescopic rod to extend so that the sound wave transmitting device and the sound wave receiving device are both close to the impeller. After being close to the impeller, the sound wave receiving device detects the sound waves transmitted by the impeller, obtains the sound wave frequency and sends it to the control device, which can also improve the detection accuracy.

[0055] It is understandable that the specific positions where the sound wave transmitting device and the sound wave receiving device are installed in the volute are not unique. The sound wave transmitting device and the sound wave receiving device can be respectively set at different positions on the inner wall of the volute, and can be set at 90 degrees or 180 degrees relative to the impeller axis. The propagation distance of the sound wave in the impeller will be different if the installation distance of the sound wave transmitting device and the sound wave receiving device is different. The value of the frequency limit value is adjusted in combination with the position of the sound wave transmitting device and the sound wave receiving device to more accurately determine whether oil cleaning is required.

[0056] In one embodiment, the sound wave receiving device and the sound wave transmitting device are respectively located on opposite sides of the impeller. Specifically, a retractable telescopic rod can be fixed from the leftmost side of the impeller axis to the inner wall of the volute, and the other end of the telescopic rod is fixed to the sound wave transmitting device. Another telescopic rod is fixed on the inner wall of the other side of the volute along the impeller axis, and the other end of the telescopic rod is fixed to the sound wave receiving device. The fastest transmission path of the sound wave emitted by the sound wave transmitting device is half a circle of the impeller. After receiving the sound wave, the sound wave receiving device analyzes the sound wave frequency and feeds it back to the user.

[0057] In another embodiment, the sound wave transmitting device and the sound wave receiving device can also be respectively arranged in a storage box where the volute is installed. When cleaning detection is not required, the sound wave transmitting device and the sound wave receiving device are located in the storage box. When cleaning detection is required, the control device can slide the sound wave transmitting device and the sound wave receiving device into the volute through a slide rail. After use, the sound wave transmitting device and the sound wave receiving device can be slid out of the volute and returned to the storage box through the slide rail to avoid oil stains adhering to the sound wave detection device during the use of the range hood. In addition, the sound wave detection device can also be directly attached to the impeller to transmit frequency for cleaning detection.

[0058] In one embodiment, when the cleaning detection condition is that the range hood is not in a working state and an active detection instruction is received, after step S140, the method may further include: after outputting the cleaning reminder information for a preset time, if the range hood is not in a working state, executing the step of controlling the sound wave emitting device to emit sound waves to the impeller of the range hood in step S120.

[0059] When the user actively starts the cleaning test, if the test determines that grease cleaning is needed, after the preset time of outputting the cleaning reminder message, if the range hood is not in working condition, another active test will be performed. If it is still determined that grease cleaning is needed, the cleaning reminder message will be output again to remind the user, so as to avoid the user actively starting the test and then forgetting whether cleaning is needed after being reminded.

[0060] In one embodiment, a range hood cleaning reminder device is also provided, which is suitable for reminding the cleaning of the inner cavity of the range hood, such as Figure 2 As shown, the device includes a state monitoring module 110 , a detection control module 120 , a data receiving module 130 and a cleaning reminder module 140 .

[0061] The status monitoring module 110 is used to monitor whether the status of the range hood meets the preset cleaning detection conditions; the detection control module 120 is used to control the sound wave transmitting device to transmit sound waves to the impeller of the range hood when the status of the range hood meets the cleaning detection conditions; the data receiving module 130 is used to obtain the sound wave frequency obtained by the sound wave receiving device based on the sound wave detection transmitted by the impeller; the cleaning reminder module 140 is used to output cleaning reminder information when the sound wave frequency is greater than or equal to the preset frequency limit value.

[0062] In one embodiment, the cleaning detection condition includes: the range hood is not in working state. In another embodiment, the cleaning detection condition includes: the range hood is not in working state and an active detection instruction is received.

[0063] In one embodiment, the detection control module 120 controls the telescopic rod to extend and place the sound wave emitting device close to the impeller, and then controls the sound wave emitting device to emit a fixed frequency sound wave to the impeller of the range hood. The sound wave emitting device is fixed to the inner wall of the volute of the range hood through the telescopic rod.

[0064] In one embodiment, the data receiving module 130 extends the telescopic rod to bring the sound wave receiving device close to the impeller, and then receives the sound wave frequency detected by the sound wave receiving device according to the sound wave transmitted by the impeller. The sound wave receiving device is fixed to the inner wall of the volute of the range hood through the telescopic rod.

[0065] In one embodiment, the sound wave receiving device and the sound wave transmitting device are respectively located on opposite sides of the impeller.

[0066] In one embodiment, when the cleaning detection condition is that the range hood is not in a working state and an active detection instruction is received, the cleaning reminder module 140, after outputting the cleaning reminder information, is also used to control the detection control module 120 to control the sound wave emitting device to emit sound waves to the impeller of the range hood again after outputting the cleaning reminder information for a preset time period, if the range hood is not in a working state.

[0067] The specific definition of the range hood cleaning reminder device can be found in the definition of the range hood cleaning reminder method above, which will not be repeated here. Each module in the above range hood cleaning reminder device can be implemented in whole or in part by software, hardware, and a combination thereof. Each of the above modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to each of the above modules.

[0068] The above-mentioned range hood cleaning reminder device, when monitoring that the state of the range hood meets the cleaning detection conditions, transmits sound waves to the impeller of the range hood through the sound wave transmitting device, and obtains the sound wave frequency obtained by the sound wave receiving device according to the sound wave detection transmitted by the impeller, and outputs the cleaning reminder information when the sound wave frequency is greater than or equal to the preset frequency limit value. The degree of adhesion of oil stains can be more accurately judged through sound waves, and feedback can be given to the user whether cleaning is needed based on the degree of use of the range hood and the amount of oil stains accumulated, so that the user can clean the oil stains at a more effective time node, effectively improving the accuracy of the cleaning reminder of the range hood.

[0069] In one embodiment, a range hood is also provided, such as Figure 3As shown, it includes an impeller 1, a volute 2, a motor 3, a sound wave transmitting device 4, a sound wave receiving device 5 and a control device, and the control device is connected to the sound wave transmitting device 4 and the sound wave receiving device 5, and is used to perform range hood cleaning reminder control according to the above method. The control device can be a separate controller or the original controller of the range hood.

[0070] In one embodiment, the range hood further comprises a telescopic rod, the sound wave emitting device 4 is fixed to the inner wall of the volute 2 via the telescopic rod, the sound wave receiving device 5 is fixed to the inner wall of the volute 2 via the telescopic rod, and the sound wave receiving device 5 and the sound wave emitting device 4 are respectively located on opposite sides of the impeller 1. Specifically, Figure 3 As shown, the telescopic rod includes a telescopic rod 6 and a telescopic rod 7. The telescopic rod 6 is fixed from the leftmost side of the impeller 1 axis to the inner wall of the volute 2. The other end of the telescopic rod 6 is fixed with a sound wave emitting device 4 which can emit waves of a certain frequency. The telescopic rod 7 is fixed on the inner wall of the other side of the volute 2 along the impeller axis. The other end of the telescopic rod 7 is fixed with a sound wave receiving device 5.

[0071] In another embodiment, the range hood further includes a slide rail and a storage box arranged on the inner wall of the volute 2, the storage box is used to place the sound wave receiving device 5 and the sound wave emitting device 4, and the slide rail is used to make the sound wave receiving device 5 and the sound wave emitting device 4 slide in or out of the volute 2.

[0072] When the range hood detects that the state of the range hood meets the cleaning detection conditions, the sound wave transmitting device 4 transmits sound waves to the impeller 1 of the range hood, and obtains the sound wave frequency detected by the sound wave receiving device 5 according to the sound wave transmitted by the impeller 1, and outputs the cleaning reminder information when the sound wave frequency is greater than or equal to the preset frequency limit value. The degree of adhesion of oil stains can be more accurately judged by sound waves, and feedback can be given to the user whether cleaning is needed based on the degree of use of the range hood and the amount of accumulated oil stains, so that the user can clean the oil stains at a more effective time node, effectively improving the accuracy of the cleaning reminder of the range hood.

[0073] In order to facilitate a better understanding of the above-mentioned range hood cleaning reminder method, device and range hood, a detailed explanation is given below in conjunction with specific embodiments.

[0074] After the range hood has been used for a period of time, the impeller and volute in the suction and exhaust system will absorb a lot of oil due to the contact with the oil smoke during use. The longer the time, the more difficult it is to clean the oil. This requires professional cleaning personnel to regularly disassemble the machine for comprehensive cleaning, which takes a lot of time and money and causes great inconvenience. If the inner cavity is not cleaned for a long time, the load in the suction and exhaust system will increase, and the performance indicators will decline, which is specifically reflected in the decline of suction and increased noise. In particular, the oil on the impeller, if not cleaned in time, will have a great impact on the performance of the range hood. In addition to the decline in performance, the accumulation of oil stains breeds bacteria, and the residual odor seriously affects the health of users. At present, range hoods with cleaning functions all use timers to remind users that the cleaning cycle has been reached. This reminder method is very limited. The frequency of use of the range hood is different for different users, and the suction and exhaust power used is also different. In this way, the accumulated amount of oil stains also changes with different users, and it is impossible to give users an accurate feedback to clean the range hood.

[0075] As people's lives continue to improve, their yearning for a better life becomes increasingly urgent, and the demand for the convenience of using smart home appliances continues to rise. It is of great practical significance to develop a better, more convenient and real-time cleaning reminder method for cleaning oil stains in the inner cavity of range hoods.

[0076] Based on this, the present application provides a range hood, the structure of which is as follows: Figure 3 As shown, the impeller 1, the volute 2 and the motor 3 are connected to each other, a retractable telescopic rod 6 is fixed from the leftmost side of the axis of the impeller 1 to the inner wall of the volute 2, and a sound wave emitting device 4 is fixed at the other end of the telescopic rod 6, which can emit waves of a certain frequency, and a telescopic rod 7 is fixed on the inner wall of the other side of the volute 2 along the axis of the impeller, and a sound wave receiving device 5 is fixed at the other end of the telescopic rod 7.

[0077] When the range hood is in operation or turned off, the acoustic wave detection device is in the unextended state, and its mechanism state is as follows: Figure 3 When the range hood is finished working, the sonic detection device will be activated and in the extended working state. Figure 4 and Figure 5 As shown, the telescopic rod 6 and the telescopic rod 7 will operate simultaneously, and the sound wave transmitting device 4 and the sound wave receiving device 5 will be extended at the same time until they are close to the impeller 1. Then the sound wave transmitting device 4 will emit a sound wave of a certain frequency. At this time, the fastest transmission path of the sound wave is half a circle of the impeller. Then the sound wave receiving device 5 will receive a sound wave of a certain frequency, and then analyze the sound wave frequency and feed it back to the user. Figure 6The figure shows a schematic diagram of the working principle of the range hood, wherein the sound wave generator and the receiver refer to the sound wave transmitting device 4 and the sound wave receiving device 5 respectively. When there is no oil on the surface of the impeller 1, the frequency received by the sound wave receiving device 5 is in a fixed small interval. When there is oil on the surface of the impeller, and with continuous use, the degree of oil adhesion continues to increase, and at this time, the sound wave frequency received by the sound wave receiving device 5 will also change according to a certain trend. When a critical value is reached, it means that the degree of oil adhesion has reached a level that needs to be cleaned, and a signal will be fed back to the user to remind the user to clean. The sound wave transmitting device 4 and the sound wave receiving device 5 can also be used as a hidden type, the sound wave detection device and the volute 2 are connected by a slide rail, and then the sound wave detection device is loaded into the storage box. When in use, the sound wave detection device is slid into the volute 2. After use, the sound wave detection device will slide out of the volute 2 and return to the storage box to avoid oil adhesion on the sound wave detection device during use. In addition, the sound wave detection device can also be attached to the impeller 1 to directly transmit the frequency for detection.

[0078] For range hoods, a switch with active detection control is also provided, such as Figure 7 The figure shows the operation function diagram of the control panel of the range hood. The control panel can be a touch screen. The detection button on the touch screen can be used to send active detection instructions to actively start the cleaning detection process. If the user forgets whether cleaning is needed after being reminded, he can start the detection by himself to get feedback again. If the active detection switch is accidentally touched during the normal operation of the range hood, the operating status of the range hood cannot be detected at this time, that is, the switch activation is invalid.

[0079] After the range hood is finished working, the ultrasonic detection device is used to detect the frequency change of the sound wave passing through the impeller 1 and the volute 2 and compare it with the set value to detect whether the degree of oil adhesion in the impeller 1 and the volute 2 has reached the degree of cleaning. The ultrasonic wave can more accurately judge the degree of oil adhesion, and it will not be disturbed by the different vibration frequencies generated by different rotation speeds of the range hood in the working state. After each use of the range hood, the degree of oil pollution will be passively detected once, and the detection button on the touch screen can also be used to actively detect the degree of oil adhesion. During the detection, the two telescopic rods are started at the same time, and the sound wave transmitting device 4 and the sound wave receiving device 5 are pressed against the two sides of the impeller 1. Then the received frequency is sent to the controller, and after analysis, the degree of oil adhesion and whether cleaning is needed are fed back to the user. It can provide real-time feedback to the user on whether cleaning is needed based on the usage level of the range hood and the amount of accumulated oil, making the detection more intelligent and helping the user save unnecessary time in cleaning the range hood. It can also allow the user to clean the oil on the impeller 1 and the volute 2 at a more effective time point, thereby ensuring the dynamic balance of the impeller 1, extending the service life of the impeller 1 and the motor 3, and maintaining the lasting power of the fan system.

[0080] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0081] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A range hood cleaning reminder method, characterized in that: include: Monitor whether the status of the range hood meets the preset cleaning test conditions; When the state of the range hood meets the cleaning detection condition, the sound wave emitting device is controlled to emit sound waves to the impeller of the range hood; wherein, the control of the sound wave emitting device to emit sound waves to the impeller of the range hood comprises: after controlling the telescopic rod to extend and bring the sound wave emitting device close to the impeller, the sound wave emitting device is controlled to emit sound waves of a fixed frequency to the impeller of the range hood; the sound wave emitting device is fixed to the inner wall of the volute of the range hood through the telescopic rod; Acquiring a sound wave frequency detected by a sound wave receiving device according to the sound wave transmitted by the impeller; When the sound wave frequency is greater than or equal to a preset frequency limit value, a cleaning reminder message is output.

2. The range hood cleaning reminder method according to claim 1, characterized in that: The cleaning detection condition includes: the range hood is not in working state.

3. The range hood cleaning reminder method according to claim 1, characterized in that: The cleaning detection condition includes: the range hood is not in working state and receives an active detection instruction.

4. The range hood cleaning reminder method according to claim 1, characterized in that: When the sound wave frequency is greater than or equal to a preset frequency limit value, after outputting a cleaning reminder message, the method further includes: After the cleaning reminder message is output for a preset time, if the range hood is not in working state, the sound wave emitting device is controlled to emit sound waves to the impeller of the range hood.

5. The range hood cleaning reminder method according to claim 1, characterized in that: The sound wave receiving device acquires the sound wave frequency detected by the sound wave transmitted by the impeller, including: After the telescopic rod is controlled to extend and the sound wave receiving device is pressed against the impeller, the sound wave frequency obtained by the sound wave receiving device according to the sound wave detection transmitted by the impeller is received; wherein, the sound wave receiving device is fixed to the inner wall of the volute of the range hood through the telescopic rod.

6. The range hood cleaning reminder method according to claim 5, characterized in that: The sound wave receiving device and the sound wave transmitting device are respectively located on two opposite sides of the impeller.

7. A range hood cleaning reminder device, characterized in that: include: A status monitoring module is used to monitor whether the status of the range hood meets the preset cleaning detection conditions; The detection control module is used to control the sound wave emitting device to emit sound waves to the impeller of the range hood when the state of the range hood meets the cleaning detection condition; wherein, the control of the sound wave emitting device to emit sound waves to the impeller of the range hood comprises: controlling the telescopic rod to extend to make the sound wave emitting device close to the impeller, and then controlling the sound wave emitting device to emit sound waves of a fixed frequency to the impeller of the range hood; the sound wave emitting device is fixed to the inner wall of the volute of the range hood through the telescopic rod; A data receiving module, used for acquiring the sound wave frequency detected by the sound wave receiving device according to the sound wave transmitted by the impeller; The cleaning reminder module is used to output cleaning reminder information when the sound wave frequency is greater than or equal to a preset frequency limit value.

8. A range hood, characterized in that: It includes an impeller, a volute, a motor, a sound wave transmitting device, a sound wave receiving device and a control device. The control device is connected to the sound wave transmitting device and the sound wave receiving device, and is used to perform range hood cleaning reminder control according to the method described in any one of claims 1 to 6.

9. The range hood according to claim 8, characterized in that: It also includes a telescopic rod, through which the sound wave transmitting device is fixed to the inner wall of the volute, and the sound wave receiving device is fixed to the inner wall of the volute through the telescopic rod, and the sound wave receiving device and the sound wave transmitting device are respectively located on opposite sides of the impeller.

10. The range hood according to claim 8, characterized in that: It also includes a slide rail and a storage box arranged on the inner wall of the volute, the storage box is used to place the sound wave receiving device and the sound wave transmitting device, and the slide rail is used to make the sound wave receiving device and the sound wave transmitting device slide into or out of the volute.

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