Scale cleaning method and device for intelligent steaming oven and intelligent steaming oven

Abstract

The invention discloses a scale cleaning method and device for an intelligent steaming oven and the intelligent steaming oven, and the method comprises the steps: obtaining a real-time temperature value of a heating plate and a preset scale thickness threshold value corresponding to the heating plate under the condition that the intelligent steaming oven completes a cooking task; if the real-time temperature value is larger than the preset temperature threshold value, the thickness detection device is controlled to send an ultrasonic signal to the heating disc; acquiring an echo signal received by the thickness detection device based on the ultrasonic signal; according to the echo signal and a preset scale thickness threshold value, a scale thickness detection result of scale on the heating disc is determined; if the incrustation thickness detection result represents that the current incrustation thickness value of the incrustation on the heating disc is larger than or equal to the preset incrustation thickness threshold value, the target ultrasonic frequency value, corresponding to the current incrustation thickness value, of the cleaning device is determined; and controlling the cleaning device to start working at the target ultrasonic frequency value so as to clean scale on the heating disc. According to the invention, scale in the intelligent steaming and baking box can be cleaned accurately and efficiently.

Description

Technical Field

[0001] This application relates to the field of smart appliance technology, and in particular to a method, apparatus and smart steam oven for cleaning scale in a smart steam oven. Background Technology

[0002] With the continuous improvement of people's living standards and the widespread application of technologies such as the Internet, big data, artificial intelligence, and voice interaction, traditional home lifestyles are undergoing profound changes, and home appliances are increasingly developing towards intelligence and multi-functionality. In this process, steam ovens, as an important piece of equipment in modern kitchens, while providing convenience and diverse functions, also face a series of technical problems caused by long-term use, especially the increasingly prominent issue of limescale buildup on the heating plate.

[0003] During the operation of a steam oven, the heating plate is in constant contact with high-temperature steam, which easily leads to the formation of limescale. This continuous accumulation of limescale not only significantly reduces heat transfer efficiency, resulting in heat loss of 20%–40%, but also causes localized overheating of the heating plate, posing a safety hazard. Furthermore, limescale buildup affects the accuracy of temperature sensors, leading to inaccurate temperature control and further impacting the normal operation of the equipment and food processing results. If limescale buildup is severe, users need to disassemble the machine for manual cleaning, which is complex and costly. While the commonly used method of soaking in acetic acid for descaling has some effect, its acidic substances may corrode metal parts, shortening product lifespan and creating additional maintenance risks and financial burdens. Summary of the Invention

[0004] This application provides a method, apparatus, and intelligent steam oven for cleaning limescale inside an intelligent steam oven, which can achieve precise and efficient cleaning of limescale inside the intelligent steam oven.

[0005] On one hand, this application provides a method for cleaning limescale from an intelligent steam oven, wherein the intelligent steam oven is equipped with a heating plate, a thickness detection device, and a cleaning device, and the method includes: When the smart steam oven completes the cooking task, the real-time temperature value of the heating plate and the preset scale thickness threshold corresponding to the heating plate are obtained; the preset scale thickness threshold is the lower limit value for triggering the cleaning task when the scale generated by the heating plate during cooking is generated. If the real-time temperature value is greater than the preset temperature threshold, the thickness detection device is controlled to send an ultrasonic signal to the heating plate. The thickness detection device receives the echo signal based on the ultrasonic signal; The scale thickness detection result on the heating plate is determined based on the echo signal and the preset scale thickness threshold. If the scale thickness detection result indicates that the current scale thickness value on the heating plate is greater than or equal to the preset scale thickness threshold, the target ultrasonic frequency value of the cleaning device corresponding to the current scale thickness value is determined. The cleaning device is controlled to start operating at the target ultrasonic frequency value to clean the scale on the heating plate.

[0006] In one exemplary embodiment, the intelligent steam oven is further provided with a temperature measuring circuit; the temperature measuring circuit includes an output chip, a sampling resistor, and the heating plate connected in series; the step of acquiring the real-time temperature value of the heating plate and the preset scale thickness threshold corresponding to the heating plate when the intelligent steam oven completes the cooking task includes: When the intelligent steam oven completes the cooking task, the preset scale thickness threshold, the output voltage value of the temperature measuring circuit, the sampling resistance value of the sampling resistor, and the sampling current value are obtained. The circuit resistance value is obtained by calculating the ratio between the output voltage value and the sampled current value. The current resistance value of the heating plate is obtained by calculating the difference between the circuit resistance value and the sampling resistance value. The temperature value that matches the current resistance value is found in the resistance-temperature relationship library to obtain the real-time temperature value of the heating plate; the resistance-temperature relationship library includes a preset mapping relationship between the resistance value of the heating plate and the preset temperature value.

[0007] In one exemplary embodiment, acquiring the echo signal received by the thickness detection device based on the ultrasonic signal includes: The thickness detection device receives a first interface based on the ultrasonic signal and returns a first echo signal, and obtains a first receiving time corresponding to the first echo signal; the first interface is the interface between the heating plate and the scale on the heating plate. The thickness detection device receives the second interface based on the second echo signal returned by the ultrasonic signal, and obtains the second reception time corresponding to the second echo signal; the second interface is the interface between the scale on the heating plate and the water covering the surface of the scale.

[0008] In one exemplary embodiment, before determining the scale thickness detection result on the heating plate based on the echo signal and the preset scale thickness threshold, the method further includes: The number of echo signals is determined based on the first echo signal and the second echo signal; The step of determining the scale thickness detection result on the heating plate based on the echo signal and the preset scale thickness threshold includes: Calculate the difference between the second reception time and the first reception time to obtain the target time difference; Obtain the target sound velocity of the thickness detection device; Calculate the product between the target sound velocity and the target time difference to obtain the initial scale thickness value; The ratio between the initial scale thickness value and the echo signal quantity value is calculated to obtain the current scale thickness value on the heating plate; The scale thickness detection result is determined based on the current scale thickness value and the preset scale thickness threshold.

[0009] In one exemplary embodiment, the preset scale thickness threshold includes a first preset scale thickness threshold and a second preset scale thickness threshold; the cleaning device is configured with a first ultrasonic frequency value and a second ultrasonic frequency value; the step of determining the target ultrasonic frequency value of the cleaning device corresponding to the current scale thickness value if the scale thickness detection result indicates that the current scale thickness value on the heating plate is greater than or equal to the preset scale thickness threshold includes: If the current scale thickness value is greater than or equal to the first preset scale thickness threshold, and the current scale thickness value is less than the second preset scale thickness threshold, then the first ultrasonic frequency value is determined to be the target ultrasonic frequency value; the second preset scale thickness threshold is greater than the first preset scale thickness threshold. If the current scale thickness value is greater than or equal to the second preset scale thickness threshold, the second ultrasonic frequency value is determined to be the target ultrasonic frequency value; the second ultrasonic frequency value is greater than the first ultrasonic frequency value.

[0010] In one exemplary embodiment, the preset scale thickness threshold further includes a preset attenuation rate threshold; the step of determining the scale thickness detection result on the heating plate based on the echo signal and the preset scale thickness threshold further includes: Obtain the preset voltage value corresponding to the heating plate; the preset voltage value is the voltage value corresponding to the echo signal received by the thickness detection device when the heating plate is free of scale. The first echo signal is subjected to analog-to-digital conversion to obtain a set of voltage values; The target voltage value is obtained by filtering the set of voltage values. Calculate the difference between the target voltage value and the preset voltage value to obtain the voltage difference; Calculate the ratio between the voltage difference and the preset voltage value to obtain the current signal attenuation rate; The scale thickness detection result is determined based on the current signal attenuation rate and the preset attenuation rate threshold.

[0011] In one exemplary embodiment, the preset attenuation rate threshold includes a first preset attenuation rate threshold and a second preset attenuation rate threshold; after determining the scale thickness detection result on the heating plate based on the echo signal and the preset scale thickness threshold, the method further includes: If the current signal attenuation rate is greater than or equal to the first preset attenuation rate threshold, and the current signal attenuation rate is less than the second preset attenuation rate threshold, the first ultrasonic frequency value is determined to be the target ultrasonic frequency value; the second preset attenuation rate threshold is greater than the first preset attenuation rate threshold. If the current signal attenuation rate is greater than or equal to the second preset attenuation rate threshold, the second ultrasonic frequency value is determined to be the target ultrasonic frequency value.

[0012] In one exemplary embodiment, the intelligent steam oven further includes a water tank disposed opposite to the heating plate; the cleaning device is disposed in the water tank; controlling the cleaning device to start working at the target ultrasonic frequency value to clean the scale on the heating plate includes: Obtain the current water level value of the water tank; If the current water level is greater than or equal to a preset water level threshold, the cleaning device is controlled to start working at the target ultrasonic frequency value to generate cavitation bubbles in the water tank to clean the scale on the heating plate; the preset water level threshold is the lower limit value at which the heating plate is immersed in the liquid in the water tank.

[0013] On the other hand, a scale cleaning device for an intelligent steam oven is provided. The intelligent steam oven is equipped with a heating plate, a scale detection device, and a cleaning device. The device includes: The acquisition module is used to acquire the real-time temperature value of the heating plate and the preset scale thickness threshold corresponding to the heating plate when the smart steam oven completes the cooking task; the preset scale thickness threshold is the lower limit value of the scale thickness generated by the heating plate during cooking that triggers the cleaning task. An ultrasonic signal transmitting module is used to control the thickness detection device to send an ultrasonic signal to the heating plate if the real-time temperature value is greater than a preset temperature threshold. An echo signal acquisition module is used to acquire the echo signal received by the thickness detection device based on the ultrasonic signal; The scale thickness detection result determination module is used to determine the scale thickness detection result on the heating plate based on the echo signal and the preset scale thickness threshold. The target ultrasonic frequency value determination module is used to determine the target ultrasonic frequency value of the cleaning device corresponding to the current scale thickness value if the scale thickness detection result indicates that the current scale thickness value on the heating plate is greater than or equal to the preset scale thickness threshold. A cleaning module is used to control the cleaning device to start working at the target ultrasonic frequency value to clean the scale on the heating plate.

[0014] On the other hand, a smart steam oven is provided, which performs the scale cleaning method for smart steam ovens described above.

[0015] On the other hand, an electronic device is provided, the device including a processor and a memory, the memory storing at least one instruction or at least one program, the at least one instruction or the at least one program being loaded and executed by the processor to perform the scale cleaning method for the intelligent steam oven as described above.

[0016] On the other hand, a computer-readable storage medium is provided, wherein at least one instruction or at least one program is stored therein, the at least one instruction or at least one program being loaded and executed by a processor to implement the scale cleaning method for the intelligent steam oven as described above.

[0017] On the other hand, a computer program product or computer program is provided, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the descaling method for the intelligent steam oven as described above.

[0018] This application provides a method, apparatus, and intelligent steam oven for cleaning limescale in an intelligent steam oven, which has the following technical effects: When the intelligent steam oven completes a cooking task, the application acquires the real-time temperature value of the heating plate and a preset limescale thickness threshold corresponding to the heating plate; the preset limescale thickness threshold is the lower limit value for triggering a cleaning task based on the limescale thickness generated on the heating plate during cooking; if the real-time temperature value is greater than the preset temperature threshold, the application controls the thickness detection device to send an ultrasonic signal to the heating plate; the application acquires the echo signal received by the thickness detection device based on the ultrasonic signal; the application determines the limescale thickness detection result on the heating plate based on the echo signal and the preset limescale thickness threshold; if the limescale thickness detection result indicates that the current limescale thickness value on the heating plate is greater than or equal to the preset limescale thickness threshold, the application determines the target ultrasonic frequency value of the cleaning device corresponding to the current limescale thickness value; the application controls the cleaning device to start working at the target ultrasonic frequency value to clean the limescale on the heating plate. The intelligent steam oven is equipped with two ultrasonic generators: a thickness detection device and a cleaning device. One is used to detect the presence of limescale on the heating plate, and the other is used to clean the limescale. By detecting the real-time temperature of the heating plate, the thickness detection device obtains the limescale thickness when the heating plate is overheated, enabling accurate judgment of the limescale deposition. Combined with a preset limescale thickness threshold, the thickness of the limescale on the heating plate is determined, and the corresponding ultrasonic frequency value is determined. The cleaning device then cleans the limescale on the heating plate, avoiding ineffective or excessive cleaning that would waste resources. This achieves precise and efficient cleaning of the limescale on the heating plate, improving the intelligence level of the intelligent steam oven. Attached Figure Description

[0019] To more clearly illustrate the technical solutions and advantages in the embodiments or prior art of this specification, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic flowchart of a method for cleaning limescale from an intelligent steam oven, as provided in the embodiments of this specification. Figure 2 This is a flowchart illustrating a method for obtaining real-time temperature values ​​provided in the embodiments of this specification; Figure 3 This is a circuit diagram of a heating plate probe provided in the embodiments of this specification; Figure 4 This is a schematic flowchart of a self-cleaning method for a steam oven provided in the embodiments of this specification; Figure 5 This is a schematic diagram of the scale cleaning device for the intelligent steam oven provided in the embodiments of this specification.

[0021] Figure 6 This is a schematic diagram of the server structure for a method of cleaning limescale from an intelligent steam oven, as provided in the embodiments of this specification. Detailed Implementation

[0022] The technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or server that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0024] The following describes a method for cleaning limescale from a smart steam oven according to this application. Figure 1 This is a flowchart illustrating a method for cleaning limescale from a smart steam oven, as provided in an embodiment of this specification. This specification provides the operational steps described in the embodiments or flowchart, but based on conventional or non-inventive methods, more or fewer operational steps may be included. The order of steps listed in the embodiments is merely one possible execution order among many and does not represent the only possible execution order. In actual system or server product execution, the methods shown in the embodiments or drawings can be executed sequentially or in parallel (e.g., in a parallel processor or multi-threaded processing environment). Specifically, as shown... Figure 1 As shown, the intelligent steam oven is equipped with a heating plate, a thickness detection device, and a cleaning device. The method can be applied to the control unit of the intelligent steam oven, and the method includes: S101: When the intelligent steam oven completes the cooking task, obtain the real-time temperature value of the heating plate and the preset scale thickness threshold corresponding to the heating plate; the preset scale thickness threshold is the lower limit value of the scale thickness generated by the heating plate during cooking that triggers the cleaning task.

[0025] In the embodiments of this specification, after the smart steam oven finishes working, scale residue will remain on the heating plate, which will cause local overheating of the heating plate. Therefore, when the smart steam oven completes the cooking task, the real-time temperature value of the heating plate and the corresponding preset scale thickness threshold are obtained. The preset scale thickness threshold is the lower limit value of the scale thickness generated on the heating plate during cooking that triggers the cleaning task. Depending on the different scale thickness detection methods and the ultrasonic frequency required, the preset scale thickness threshold can be divided into a specific scale thickness value threshold and a signal attenuation rate threshold.

[0026] In this embodiment of the specification, the intelligent steam oven is further provided with a temperature measuring circuit; the temperature measuring circuit includes an output chip, a sampling resistor, and the heating plate connected in series; when the intelligent steam oven completes the cooking task, it acquires the real-time temperature value of the heating plate and the preset scale thickness threshold corresponding to the heating plate, such as... Figure 2 As shown, Figure 2 A flowchart illustrating a method for obtaining real-time temperature values ​​provided in this embodiment of the specification includes: S201: When the intelligent steam oven completes the cooking task, obtain the preset scale thickness threshold, the output voltage value of the temperature measuring circuit, the sampling resistance value of the sampling resistor, and the sampling current value.

[0027] In the embodiments described in this specification, a heating plate probe is provided on the heating plate; therefore, to obtain the temperature value of the heating plate, the temperature value of the heating plate probe can be obtained. Figure 3 As shown, Figure 3 A circuit diagram of a heating plate probe provided for an embodiment of this specification; Figure 3 CN6 is the output chip, outputting 5V voltage. R24 is the sampling resistor, R26 is a resistor, and C10 is a capacitor. Since R26 and C10 together form an RC filter circuit, therefore... Figure 3 In reality, there is only one series voltage divider circuit, namely CN6-R24-heating plate probe; When the smart steam oven completes the cooking task, it acquires the preset scale thickness threshold, the voltage value output by CN6 (i.e., the output voltage value of the temperature measuring circuit), the sampling resistance value of sampling resistor R24, and the sampling current value flowing through sampling resistor R24.

[0028] S202: Calculate the ratio between the output voltage value and the sampled current value to obtain the circuit resistance value.

[0029] In the embodiments of this specification, since only a series voltage divider circuit exists, the current flowing through the sampling resistor is the same as that of the heating plate probe; according to Ohm's law, the ratio between the output voltage value and the sampling current value is calculated to obtain the circuit resistance value, which is the sum of the resistance value of the sampling resistor and the resistance value of the heating plate probe.

[0030] S203: Calculate the difference between the circuit resistance value and the sampling resistance value to obtain the current resistance value of the heating plate.

[0031] In the embodiments of this specification, the current resistance value of the heating plate probe is obtained by calculating the difference between the circuit resistance value and the sampling resistance value.

[0032] S204: Search for a temperature value that matches the current resistance value in the resistance-temperature relationship library to obtain the real-time temperature value of the heating plate; the resistance-temperature relationship library includes a preset mapping relationship between the resistance value of the heating plate and the preset temperature value.

[0033] In the embodiments of this specification, the detected temperature of the heating plate probe corresponds to the change in resistance of the heating plate probe. Therefore, the temperature value of the heating plate probe, i.e., the real-time temperature value of the heating plate, can be determined based on the calculated current resistance value of the heating plate probe. Specifically, a resistance-temperature relationship library is preset, which includes a preset mapping relationship between the resistance value of the heating plate and the preset temperature value. The temperature value that matches the current resistance value is searched in the resistance-temperature relationship library to obtain the real-time temperature value of the heating plate. The resistance detection circuit of the heating plate probe is formed using a small number of components, which simplifies the circuit structure. Furthermore, RC filtering reduces noise interference, enhances the stability of temperature measurement, and ensures the stability of the measured temperature value of the heating plate. By measuring the current resistance value of the heating plate probe and combining it with a lookup table method to convert the current resistance value into a real-time temperature value, complex calculations are avoided, the response speed of the intelligent steam oven control system is improved, and accurate monitoring of the heating plate temperature value is achieved.

[0034] S103: If the real-time temperature value is greater than the preset temperature threshold, control the thickness detection device to send an ultrasonic signal to the heating plate.

[0035] In the embodiments of this specification, the intelligent steam oven is equipped with a thickness detection device, which is essentially a single-frequency ultrasonic generator. The thickness detection device is directly encapsulated or embedded inside the metal body of the heating plate during the manufacturing process. From a cooking perspective, the top surface of the heating plate is still a complete and flat metal plane, which will not affect the placement of food or cleaning. The intelligent steam oven system has a preset temperature threshold to determine whether the heating plate is overheating. If the real-time temperature value is greater than the preset temperature threshold, it indicates that the heating plate is overheating and there may be scale deposits on the heating plate. The thickness detection device installed in the intelligent steam oven is used to detect the thickness of the scale on the heating plate. Specifically, the measurement path of the thickness detection device is from top to bottom and is entirely through solid metal. That is, the probe of the ultrasonic generator embedded in the top of the heating plate emits a beam of ultrasonic pulses downward, which controls the thickness detection device to send ultrasonic signals to the heating plate.

[0036] S105: Obtain the echo signal received by the thickness detection device based on the ultrasonic signal.

[0037] In the embodiments of this specification, the ultrasonic signal emitted by the thickness detection device passes through the metal body of the heating plate and encounters two interfaces when it reaches the bottom of the heating plate. The echo signals reflected back from these two interfaces are then obtained.

[0038] In this embodiment of the specification, obtaining the echo signal received by the thickness detection device based on the ultrasonic signal includes: The thickness detection device receives a first interface based on the ultrasonic signal and returns a first echo signal, and obtains a first receiving time corresponding to the first echo signal; the first interface is the interface between the heating plate and the scale on the heating plate. In the embodiments of this specification, since there is scale on the bottom of the heating plate and the surface of the scale is covered with water, after the thickness detection device sends an ultrasonic signal to the heating plate, the ultrasonic signal will encounter two interfaces. First, the thickness detection device obtains the first echo signal transmitted back by the ultrasonic signal based on the first interface received by the first interface. The first interface is the interface between the heating plate and the scale on the heating plate.

[0039] The thickness detection device receives the second interface based on the second echo signal returned by the ultrasonic signal, and obtains the second reception time corresponding to the second echo signal; the second interface is the interface between the scale on the heating plate and the water covering the surface of the scale.

[0040] In the embodiments described in this specification, after the ultrasonic wave encounters the first interface, it continues to advance and encounters the second interface, namely the interface between the scale on the heating plate and the water covering the surface of the scale. The second interface undergoes a second reflection, and the thickness detection device receives the second echo signal returned by the ultrasonic signal based on the second interface. The remaining energy of the ultrasonic signal is dissipated in the water. By acquiring the two echo signals respectively, it is helpful to determine the thickness of the scale on the heating plate through the echo signals, realizing non-contact measurement of the scale on the heating plate, and providing quantifiable data for the subsequent self-cleaning of the intelligent steam oven.

[0041] S107: Determine the scale thickness detection result on the heating plate based on the echo signal and the preset scale thickness threshold.

[0042] In the embodiments of this specification, on the one hand, the current scale thickness value at the bottom of the heating plate can be calculated based on the echo signal, and the current scale thickness threshold is compared with a specific scale thickness threshold to obtain the scale thickness detection result on the heating plate, thus realizing the judgment of the scale thickness based on the intuitive scale thickness value; on the other hand, the current signal attenuation rate can be calculated based on the echo signal, and the current signal attenuation rate is compared with a signal attenuation rate threshold to obtain the scale thickness detection result on the heating plate, thus realizing the indirect judgment of the scale thickness based on the intensity change of the ultrasonic wave after passing through the medium.

[0043] In this embodiment of the specification, before determining the scale thickness detection result on the heating plate based on the echo signal and the preset scale thickness threshold, the method further includes: The number of echo signals is determined based on the first echo signal and the second echo signal; In the embodiments of this specification, based on the first echo signal and the second echo signal, it is determined that a total of 2 echo signals were received, i.e., the number of echo signals.

[0044] In this embodiment of the specification, determining the scale thickness detection result on the heating plate based on the echo signal and the preset scale thickness threshold includes: Calculate the difference between the second reception time and the first reception time to obtain the target time difference; In the embodiments of this specification, the difference between the second receiving time and the first receiving time is calculated to obtain the target time difference.

[0045] Obtain the target sound velocity of the thickness detection device; In the embodiments of this specification, the target sound velocity of the thickness detection device is obtained, that is, the propagation speed of the ultrasonic signal in the scale, and the propagation speed is a pre-determined or known constant.

[0046] Calculate the product between the target sound velocity and the target time difference to obtain the initial scale thickness value; In the embodiments of this specification, the product between the target sound speed and the target time difference is calculated to obtain the initial scale thickness value.

[0047] The ratio between the initial scale thickness value and the echo signal quantity value is calculated to obtain the current scale thickness value on the heating plate; In the embodiments of this specification, since the target time difference is the time it takes for the ultrasonic signal to travel to and from the scale layer twice, the ratio between the initial scale thickness value and the number of echo signals is calculated, that is, the ratio between the target time difference and the number of echo signals is calculated to obtain the one-way time of the ultrasonic wave, and then multiplied by the target sound speed to obtain the current scale thickness value.

[0048] The scale thickness detection result is determined based on the current scale thickness value and the preset scale thickness threshold.

[0049] In the embodiments of this specification, the current scale thickness value is compared with a specific scale thickness threshold, and the comparison result is used as the scale thickness detection result. The current scale thickness value is calculated using the echo signal, and the scale thickness detection result is obtained by combining it with the preset scale thickness threshold. This accurately determines the thickness of the scale on the heating plate, realizing precise cleaning on demand. Self-cleaning is only performed when necessary, which is both efficient and energy-saving, ensuring that the smart steam oven is always in the best condition and improving the intelligence level of the smart steam oven.

[0050] In this embodiment of the specification, the preset scale thickness threshold further includes a preset attenuation rate threshold; the step of determining the scale thickness detection result on the heating plate based on the echo signal and the preset scale thickness threshold further includes: Obtain the preset voltage value corresponding to the heating plate; the preset voltage value is the voltage value corresponding to the echo signal received by the thickness detection device when the heating plate is free of scale. In the embodiments of this specification, when the heating plate is free of scale, the thickness detection device sends an ultrasonic signal to the heating plate, and the intensity of the ultrasonic signal is the same as the intensity of the ultrasonic signal sent when scale is present on the heating plate. The echo signal received by the thickness detection device is acquired, and the echo signal is amplified, filtered, and converted from analog to digital. The multiple voltage values ​​obtained by the conversion are filtered to obtain the peak voltage, i.e., the preset voltage value; the preset voltage value is then acquired.

[0051] The first echo signal is subjected to analog-to-digital conversion to obtain a set of voltage values; In the embodiments of this specification, when scale is present on the heating plate, although there are two echo signals, the first echo signal and the second echo signal, the first echo signal is always present, that is, the first interface is always present, regardless of whether there is scale on the bottom of the heating plate. The interface is always present, except that one side of the interface is always the heating plate, and the other side may be scale / water / air. In order for the second echo signal to be received by the thickness detection device, the ultrasonic signal path is long and the signal attenuation is severe. Therefore, the first echo signal is selected. Since the first echo signal is weak and cannot be effectively processed, it is amplified to bring it up to a voltage range suitable for subsequent processing. Because the amplified signal not only contains the desired echo but also contains a large amount of noise, it is filtered to remove most of the irrelevant high and low frequency noise, making the desired echo signal more prominent and improving the signal-to-noise ratio. The filtered signal is then processed by an analog-to-digital converter (ADC) to convert the voltage value of each sampling point in the filtered signal into a digital value, resulting in a set of voltage values.

[0052] The target voltage value is obtained by filtering the set of voltage values. In the embodiments of this specification, the voltage value set is filtered. Since the peak voltage is the most prominent and easily identifiable point in the signal, the maximum value is selected to obtain the target voltage value, which represents the peak intensity of the first echo signal.

[0053] Calculate the difference between the target voltage value and the preset voltage value to obtain the voltage difference; In the embodiments of this specification, the difference between the target voltage value and the preset voltage value is calculated to obtain the voltage difference, which is the difference in signal strength between the state where there is scale on the bottom of the heating plate and the state where there is no scale.

[0054] Calculate the ratio between the voltage difference and the preset voltage value to obtain the current signal attenuation rate; In the embodiments of this specification, the ratio between the voltage difference and the preset voltage value is calculated to obtain the current signal attenuation rate, that is, the attenuation ratio of the signal strength when there is scale on the bottom of the heating plate to the attenuation ratio when there is no scale on the bottom of the heating plate.

[0055] The scale thickness detection result is determined based on the current signal attenuation rate and the preset attenuation rate threshold.

[0056] In the embodiments of this specification, the current signal attenuation rate and the preset attenuation rate threshold are compared, and the comparison result is used as the scale thickness detection result. By converting the presence of scale at the bottom of the heating plate into a quantifiable signal attenuation rate, the current signal attenuation rate is compared with the preset attenuation rate threshold to obtain the scale thickness detection result. This achieves a more accurate assessment of the thickness of scale at the bottom of the heating plate and enables real-time sensing of the scale deposition status.

[0057] In this embodiment of the specification, the preset attenuation rate threshold includes a first preset attenuation rate threshold and a second preset attenuation rate threshold; after determining the scale thickness detection result on the heating plate based on the echo signal and the preset scale thickness threshold, the method further includes: If the current signal attenuation rate is greater than or equal to the first preset attenuation rate threshold, and the current signal attenuation rate is less than the second preset attenuation rate threshold, the first ultrasonic frequency value is determined to be the target ultrasonic frequency value; the second preset attenuation rate threshold is greater than the first preset attenuation rate threshold. In the embodiments of this specification, the preset attenuation rate threshold includes a first preset attenuation rate threshold and a second preset attenuation rate threshold. The second preset attenuation rate threshold is greater than the first preset attenuation rate threshold. The first preset attenuation rate threshold is the critical value between a thin layer of scale and a relatively thin / non-existent layer of scale. The second preset attenuation rate threshold is the critical value between a thin layer of scale and a thick layer of scale. If the current signal attenuation rate is greater than or equal to the first preset attenuation rate threshold and the current signal attenuation rate is less than the second preset attenuation rate threshold, it indicates that the scale at the bottom of the heating plate is in a thin layer. The first ultrasonic frequency value is determined to be the target ultrasonic frequency value, that is, low frequency is used to clean the scale at the bottom of the heating plate.

[0058] If the current signal attenuation rate is greater than or equal to the second preset attenuation rate threshold, the second ultrasonic frequency value is determined to be the target ultrasonic frequency value.

[0059] In the embodiments of this specification, if the current signal attenuation rate is greater than or equal to the second preset attenuation rate threshold, it indicates that the scale at the bottom of the heating plate is thick. The second ultrasonic frequency value is determined to be the target ultrasonic frequency value, that is, high frequency is used to clean the scale at the bottom of the heating plate. By setting the first preset attenuation rate threshold and the second preset attenuation rate threshold, a gradient warning for the scale on the heating plate is realized, providing a suitable ultrasonic frequency value for the self-cleaning of the intelligent steam oven, avoiding the energy efficiency reduction and equipment risk caused by over-cleaning or untimely cleaning.

[0060] S109: If the scale thickness detection result indicates that the current scale thickness value on the heating plate is greater than or equal to the preset scale thickness threshold, determine the target ultrasonic frequency value of the cleaning device corresponding to the current scale thickness value.

[0061] In the embodiments of this specification, the intelligent steam oven is equipped with a cleaning device, which is essentially a dual-frequency ultrasonic generator. For example, it can be an integrated 40KHz / 80KHz dual-frequency ultrasonic generator. The bottom of the intelligent steam oven is equipped with a water tank, which is directly opposite the bottom of the heating plate. The cleaning device is located at the bottom of the water tank and is used to switch the appropriate ultrasonic frequency value to clean the scale on the bottom of the heating plate. The thin layer is cleaned with low frequency and the thick layer is cleaned with high frequency. If the scale thickness detection result indicates that the current scale thickness value on the heating plate is greater than or equal to the preset scale thickness threshold, where the preset scale thickness threshold specifically refers to a specific scale thickness value threshold, including a first preset scale thickness threshold and a second preset scale thickness threshold, and the second preset scale thickness threshold is greater than the first preset scale thickness threshold, the thickness of the scale on the heating plate is determined based on the comparison result between the current scale thickness value, the first preset scale thickness threshold, and the second preset scale thickness threshold, and the target ultrasonic frequency value of the cleaning device corresponding to the current scale thickness value is determined.

[0062] In this embodiment of the specification, the preset scale thickness threshold includes a first preset scale thickness threshold and a second preset scale thickness threshold; the cleaning device is equipped with a first ultrasonic frequency value and a second ultrasonic frequency value; the step of determining the target ultrasonic frequency value of the cleaning device corresponding to the current scale thickness value if the scale thickness detection result indicates that the current scale thickness value on the heating plate is greater than or equal to the preset scale thickness threshold includes: If the current scale thickness value is greater than or equal to the first preset scale thickness threshold, and the current scale thickness value is less than the second preset scale thickness threshold, then the first ultrasonic frequency value is determined to be the target ultrasonic frequency value; the second preset scale thickness threshold is greater than the first preset scale thickness threshold. In the embodiments of this specification, the preset scale thickness threshold includes a first preset scale thickness threshold and a second preset scale thickness threshold. Both of these are specific scale thickness value thresholds, and the second preset scale thickness threshold is greater than the first preset scale thickness threshold. The first preset scale thickness threshold is the critical value between scale being in a thin layer and scale being relatively thin / no scale, and the second preset scale thickness threshold is the critical value between scale being in a thin layer and scale being thick. The cleaning device is a dual-frequency ultrasonic generator, equipped with a first ultrasonic frequency value and a second ultrasonic frequency value, and the second ultrasonic frequency value is greater than the first ultrasonic frequency value, that is, the first ultrasonic frequency value is low frequency and the second ultrasonic frequency value is high frequency. If the current scale thickness value is greater than or equal to the first preset scale thickness threshold and the current scale thickness value is less than the second preset scale thickness threshold, it indicates that the scale thickness on the heating plate is still a thin layer. The first ultrasonic frequency value is determined to be the target ultrasonic frequency value, that is, low frequency is used to clean the scale on the heating plate.

[0063] If the current scale thickness value is greater than or equal to the second preset scale thickness threshold, the second ultrasonic frequency value is determined to be the target ultrasonic frequency value; the second ultrasonic frequency value is greater than the first ultrasonic frequency value.

[0064] In the embodiments of this specification, if the current scale thickness value is greater than or equal to the second preset scale thickness threshold, it indicates that the scale thickness on the heating plate has reached a thick layer. The second ultrasonic frequency value is then determined as the target ultrasonic frequency value, i.e., high-frequency cleaning is used to clean the scale on the heating plate. By combining the current scale thickness value, the first preset scale thickness threshold, and the second preset scale thickness threshold, the thickness of the scale on the heating plate is determined, thereby determining different ultrasonic frequency values ​​to achieve cleaning of the scale on the heating plate, avoiding ineffective or excessive cleaning, and improving the self-cleaning effect and intelligence level of the intelligent steam oven.

[0065] S111: Control the cleaning device to start working at the target ultrasonic frequency value to clean the scale on the heating plate.

[0066] In the embodiments of this specification, the water tank may contain a solution containing clean water and cleaning agent; the cleaning device is controlled to start working at a target ultrasonic frequency value, that is, to start vibrating, transmitting sound wave energy into the solution, thereby generating cavitation bubbles to clean the scale on the heating plate.

[0067] In this embodiment of the specification, the intelligent steam oven further includes a water tank disposed opposite to the heating plate; the cleaning device is disposed in the water tank; controlling the cleaning device to start working at the target ultrasonic frequency value to clean the scale on the heating plate includes: Obtain the current water level value of the water tank; In the embodiments of this specification, the bottom of the intelligent steam oven is also provided with a water tank, and the water tank is arranged opposite to the heating plate. The cleaning device is arranged in the water tank. After determining that the scale on the heating plate has reached the condition that requires self-cleaning, the current water level value of the water tank is obtained.

[0068] If the current water level is greater than or equal to a preset water level threshold, the cleaning device is controlled to start working at the target ultrasonic frequency value to generate cavitation bubbles in the water tank to clean the scale on the heating plate; the preset water level threshold is the lower limit value at which the heating plate is immersed in the liquid in the water tank.

[0069] In the embodiments of this specification, the liquid in the water tank includes water and descaling agent; the preset water level threshold is the lower limit value at which the heating plate is immersed in the liquid in the water tank. If the current water level value is greater than or equal to the preset water level threshold, it indicates that the liquid in the water tank completely immerses the bottom of the heating plate. In the immersion state, the cleaning device is started, and the cleaning device is controlled to start working at the target ultrasonic frequency value, so that the liquid in the water tank generates cavitation bubbles under the action of ultrasonic waves, thereby cleaning the scale on the heating plate; in addition, after cleaning, the intelligent steam oven can also drain all the sewage containing scale fragments and waste liquid, and refill with clean water, and start the cleaning device for short-term rinsing to ensure that there are no chemical residues, and then drain all the rinsing water again. In order to prevent the growth of bacteria, the heating plate can be started for low-temperature heating to dry its surface and the inner cavity of the intelligent steam oven. By detecting the water level in the water tank to ensure that the heating plate is completely submerged, the cleaning device is prevented from operating in a dry-burning state and from excessive vibration. This provides the necessary transmission medium for the ultrasonic energy of the cleaning device, allowing the generated cavitation bubbles to act on the scale layer, thereby achieving efficient cleaning and improving the precision and automation of the self-cleaning process of the intelligent steam oven.

[0070] In one exemplary implementation, such as Figure 4 As shown, Figure 4 This is a flowchart illustrating a self-cleaning method for a steam oven provided in an embodiment of this specification, including: S401: Determine whether the current task has been completed.

[0071] In the embodiments of this specification, it is determined whether the steam oven has completed its work, and the next operation procedure is determined based on the working status of the steam oven.

[0072] S402: Determine if the previous working mode was steaming. In the embodiments of this specification, after the steam oven has finished working, since the steam oven produces water vapor when working in steam mode, it is determined whether the previous working mode was a steam function.

[0073] S403: Determine if the temperature value of the heating plate is equal to an abnormal value; In the embodiments of this specification, since scale residue will remain on the heating plate after the steam oven finishes working, an abnormal temperature value is preset, the current temperature value of the heating plate is obtained, and it is determined whether the temperature value of the heating plate has reached the abnormal value. S404: Increment the exception count by 1.

[0074] In the embodiments described in this specification, when the temperature value of the heating plate reaches an abnormal value, the abnormality count value is incremented by 1.

[0075] S405: Determine whether the ultrasonic feedback frequency band is equal to an abnormal value; In the embodiments of this specification, after confirming that the temperature value of the heating plate is in an abnormal state, in order to prevent misjudgment, the steam oven is equipped with two ultrasonic generators: one is a single-frequency ultrasonic generator for detecting limescale, and the other is a dual-frequency ultrasonic generator for cleaning limescale. The single-frequency ultrasonic generator in the steam oven is used to detect limescale on the heating plate and to determine whether the feedback content of the ultrasonic generator is an abnormal value. S406: Increment the exception count by 1.

[0076] In the embodiments of this specification, if the feedback content of the ultrasonic generator is an abnormal value, the abnormality count value is incremented by 1.

[0077] S407: Determine whether the abnormal count value meets the self-cleaning judgment condition.

[0078] In the embodiments of this specification, the self-cleaning determination condition can be an abnormal count value of 2, and the determination can be made as to whether the abnormal count value is greater than the self-cleaning determination condition.

[0079] S408: The steam oven performs a self-cleaning process.

[0080] In the embodiments of this specification, if the abnormal count value reaches the self-cleaning judgment condition, the self-cleaning workflow is executed, and the scale on the heating plate is cleaned by a dual-frequency ultrasonic generator.

[0081] In this embodiment, the temperature value of the heating plate and the feedback from the ultrasonic generator are used to determine whether the steam oven has reached the self-cleaning process. After the self-cleaning condition is met, an appropriate ultrasonic frequency value is selected so that the ultrasonic generator works at this frequency value, thereby cleaning the scale on the heating plate. This achieves precise cleaning of the scale on the heating plate, avoids resource waste caused by ineffective or excessive cleaning, and improves the intelligence level of the steam oven.

[0082] This manual also provides a descaling device for the smart steam oven, such as... Figure 5 As shown, the intelligent steam oven is equipped with a heating plate, a thickness detection device, and a cleaning device. The device includes: The acquisition module 501 is used to acquire the real-time temperature value of the heating plate and the preset scale thickness threshold corresponding to the heating plate when the smart steam oven completes the cooking task; the preset scale thickness threshold is the lower limit value of the scale thickness generated by the heating plate during cooking that triggers the cleaning task. The ultrasonic signal transmitting module 502 is used to control the thickness detection device to send an ultrasonic signal to the heating plate if the real-time temperature value is greater than a preset temperature threshold. The echo signal acquisition module 503 is used to acquire the echo signal received by the thickness detection device based on the ultrasonic signal; The scale thickness detection result determination module 504 is used to determine the scale thickness detection result on the heating plate based on the echo signal and the preset scale thickness threshold. The target ultrasonic frequency value determination module 505 is used to determine the target ultrasonic frequency value of the cleaning device corresponding to the current scale thickness value if the scale thickness detection result indicates that the current scale thickness value on the heating plate is greater than or equal to the preset scale thickness threshold. The cleaning module 506 is used to control the cleaning device to start working at the target ultrasonic frequency value to clean the scale on the heating plate.

[0083] In some embodiments, the acquisition module further includes: The acquisition submodule is used to acquire the preset scale thickness threshold, the output voltage value of the temperature measuring circuit, the sampling resistance value of the sampling resistor, and the sampling current value when the smart steam oven completes the cooking task. The circuit resistance value determination submodule is used to calculate the ratio between the output voltage value and the sampled current value to obtain the circuit resistance value; The current resistance value determination submodule is used to calculate the difference between the circuit resistance value and the sampling resistance value to obtain the current resistance value of the heating plate; The real-time temperature value determination submodule is used to search for a temperature value that matches the current resistance value in the resistance-temperature relationship library to obtain the real-time temperature value of the heating plate; the resistance-temperature relationship library includes a preset mapping relationship between the resistance value of the heating plate and the preset temperature value.

[0084] In some embodiments, the echo signal acquisition module further includes: The first echo signal acquisition submodule is used to acquire the first echo signal returned by the first interface based on the ultrasonic signal received by the thickness detection device, and to acquire the first reception time corresponding to the first echo signal; the first interface is the interface between the heating plate and the scale on the heating plate; The second echo signal acquisition submodule is used to acquire the second echo signal returned by the second interface based on the ultrasonic signal received by the thickness detection device, and to acquire the second reception time corresponding to the second echo signal; the second interface is the interface between the scale on the heating plate and the water covering the surface of the scale.

[0085] In some embodiments, the apparatus further includes: The echo signal quantity determination module is used to determine the echo signal quantity based on the first echo signal and the second echo signal; In some embodiments, the scale thickness detection result determination module further includes: The target time difference determination submodule is used to calculate the difference between the second receiving time and the first receiving time to obtain the target time difference; The target sound velocity acquisition submodule is used to acquire the target sound velocity of the thickness detection device; The initial scale thickness determination submodule is used to calculate the product between the target sound velocity and the target time difference to obtain the initial scale thickness value. The current scale thickness value determination submodule is used to calculate the ratio between the initial scale thickness value and the echo signal quantity value to obtain the current scale thickness value on the heating plate; The first scale thickness detection result determination submodule is used to determine the scale thickness detection result based on the current scale thickness value and the preset scale thickness threshold.

[0086] In some embodiments, the target ultrasonic frequency value determination module further includes: The first target ultrasonic frequency value determination submodule is used to determine the first ultrasonic frequency value as the target ultrasonic frequency value if the current scale thickness value is greater than or equal to the first preset scale thickness threshold and the current scale thickness value is less than the second preset scale thickness threshold; the second preset scale thickness threshold is greater than the first preset scale thickness threshold. The second target ultrasonic frequency value determination submodule is used to determine the second ultrasonic frequency value as the target ultrasonic frequency value if the current scale thickness value is greater than or equal to the second preset scale thickness threshold; the second ultrasonic frequency value is greater than the first ultrasonic frequency value.

[0087] In some embodiments, the scale thickness detection result determination module further includes: A preset voltage value acquisition submodule is used to acquire the preset voltage value corresponding to the heating plate; the preset voltage value is the voltage value corresponding to the echo signal received by the thickness detection device when the heating plate is free of scale. The voltage value set determination submodule is used to perform analog-to-digital conversion processing on the first echo signal to obtain a voltage value set; The target voltage value determination submodule is used to filter the set of voltage values ​​to obtain the target voltage value; The voltage difference determination submodule is used to calculate the difference between the target voltage value and the preset voltage value to obtain the voltage difference. The current signal attenuation rate determination submodule is used to calculate the ratio between the voltage difference and the preset voltage value to obtain the current signal attenuation rate; The second scale thickness detection result determination submodule is used to determine the scale thickness detection result based on the current signal attenuation rate and the preset attenuation rate threshold.

[0088] In some embodiments, the apparatus further includes: The first ultrasonic frequency value determination module is used to determine the first ultrasonic frequency value as the target ultrasonic frequency value if the current signal attenuation rate is greater than or equal to the first preset attenuation rate threshold and the current signal attenuation rate is less than the second preset attenuation rate threshold; the second preset attenuation rate threshold is greater than the first preset attenuation rate threshold. The second ultrasonic frequency value determination module is used to determine the second ultrasonic frequency value as the target ultrasonic frequency value if the current signal attenuation rate is greater than or equal to the second preset attenuation rate threshold.

[0089] In some embodiments, the cleaning module further includes: The current water level acquisition submodule is used to acquire the current water level value of the water tank; The cleaning submodule is used to control the cleaning device to start working at the target ultrasonic frequency value if the current water level value is greater than or equal to a preset water level threshold, so as to generate cavitation bubbles in the water tank to clean the scale on the heating plate; the preset water level threshold is the lower limit value at which the heating plate is immersed in the liquid in the water tank.

[0090] The apparatus and method embodiments described herein are based on the same inventive concept.

[0091] This specification provides an intelligent steam oven that performs a scale cleaning method for an intelligent steam oven as described in the above-described method embodiments.

[0092] This specification provides an electronic device including a processor and a memory. The memory stores at least one instruction or at least one program, which is loaded and executed by the processor to implement the scale cleaning method for the intelligent steam oven provided in the above method embodiments.

[0093] The embodiments of this application also provide a computer storage medium, which can be disposed in a terminal to store at least one instruction or at least one program related to implementing a method for cleaning scale in a smart steam oven in the method embodiments. The at least one instruction or at least one program is loaded and executed by the processor to implement the method for cleaning scale in a smart steam oven provided in the above method embodiments.

[0094] Embodiments of this application also provide a computer program product or computer program, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the scale cleaning method for the intelligent steam oven provided in the above-described method embodiments.

[0095] The memory described in the embodiments of this specification can be used to store software programs and modules. The processor executes various functional applications and data processing by running the software programs and modules stored in the memory. The memory may mainly include a program storage area and a data storage area. The program storage area may store the operating system, application programs required for the functions, etc.; the data storage area may store data created according to the use of the device, etc. In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device. Accordingly, the memory may also include a memory controller to provide the processor with access to the memory.

[0096] The methods for cleaning limescale from intelligent steam ovens provided in this specification can be executed on mobile terminals, computer terminals, servers, or similar computing devices. Taking a server as an example... Figure 6 This is a hardware structure block diagram of the server for a method of cleaning limescale from an intelligent steam oven, as provided in the embodiments of this specification. Figure 6As shown, the server 600 can vary significantly due to different configurations or performance. It may include one or more Central Processing Units (CPUs) 610 (CPUs 610 may include, but are not limited to, microprocessors (MCUs) or programmable logic devices (FPGAs), a memory 630 for storing data, and one or more storage media 620 (e.g., one or more mass storage devices) for storing application programs 623 or data 622. The memory 630 and storage media 620 may be temporary or persistent storage. The program stored in the storage media 620 may include one or more modules, each module may include a series of instruction operations on the server. Furthermore, the CPU 610 may be configured to communicate with the storage media 620 and execute the series of instruction operations stored in the storage media 620 on the server 600. Server 600 may also include one or more power supplies 660, one or more wired or wireless network interfaces 650, one or more input / output interfaces 640, and / or one or more operating systems 621, such as Windows Server™, Mac OS X™, Unix™, Linux™, FreeBSD™, etc.

[0097] The input / output interface 640 can be used to receive or send data via a network. Specific examples of the network described above may include a wireless network provided by the communication provider of server 600. In one example, input / output interface 640 includes a network interface controller (NIC), which can connect to other network devices via a base station to communicate with the Internet. In another example, input / output interface 640 may be a radio frequency (RF) module used for wireless communication with the Internet.

[0098] Those skilled in the art will understand that Figure 6 The structure shown is for illustrative purposes only and does not limit the structure of the aforementioned electronic device. For example, server 600 may also include... Figure 6 The more or fewer components shown, or having the same Figure 6 The different configurations shown.

[0099] As can be seen from the above-described embodiments of the intelligent steam oven's scale cleaning method, apparatus, and intelligent steam oven provided in this application, when the intelligent steam oven completes the cooking task, this application obtains the real-time temperature value of the heating plate and the preset scale thickness threshold corresponding to the heating plate; the preset scale thickness threshold is the lower limit value for the scale thickness generated by the heating plate during cooking to trigger the cleaning task; if the real-time temperature value is greater than the preset temperature threshold, the thickness detection device is controlled to send an ultrasonic signal to the heating plate; the echo signal received by the thickness detection device based on the ultrasonic signal is obtained; according to the echo signal and the preset scale thickness threshold, the scale thickness detection result on the heating plate is determined; if the scale thickness detection result indicates that the current scale thickness value on the heating plate is greater than or equal to the preset scale thickness threshold, the target ultrasonic frequency value of the cleaning device corresponding to the current scale thickness value is determined; the cleaning device is controlled to start working at the target ultrasonic frequency value to clean the scale on the heating plate. By using a small number of components to construct the heating plate temperature detection circuit, the circuit structure is simplified, and RC filtering is used to reduce noise interference and enhance the stability of temperature measurement. In the event of overheating of the heating plate, a thickness detection device is used to detect the thickness of scale on the heating plate, achieving accurate detection of scale deposition. The corresponding ultrasonic frequency value is matched according to the thickness of the scale, and a cleaning device is used for cleaning, achieving efficient and accurate cleaning of scale on the heating plate, avoiding ineffective or over-cleaning, reducing resource consumption, and improving the intelligence level of the smart steam oven.

[0100] It should be noted that the order of the embodiments described above is merely for descriptive purposes and does not represent the superiority or inferiority of the embodiments. Furthermore, specific embodiments of this specification have been described above. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in a different order than that shown in the embodiments and still achieve the desired result. Additionally, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0101] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the embodiments of apparatus, devices, and storage media are basically similar to the method embodiments, so the descriptions are relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0102] Those skilled in the art will understand that all or part of the steps of the above embodiments can be implemented by hardware or by a program instructing related hardware. The program can be stored in a computer storage medium, such as a read-only memory, a disk, or an optical disk.

[0103] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for cleaning limescale from an intelligent steam oven, characterized in that, The intelligent steam oven is equipped with a heating plate, a thickness detection device, and a cleaning device. The method includes: When the smart steam oven completes the cooking task, the real-time temperature value of the heating plate and the preset scale thickness threshold corresponding to the heating plate are obtained; the preset scale thickness threshold is the lower limit value for triggering the cleaning task when the scale generated by the heating plate during cooking is generated. If the real-time temperature value is greater than the preset temperature threshold, the thickness detection device is controlled to send an ultrasonic signal to the heating plate. The thickness detection device receives the echo signal based on the ultrasonic signal; The scale thickness detection result on the heating plate is determined based on the echo signal and the preset scale thickness threshold. If the scale thickness detection result indicates that the current scale thickness value on the heating plate is greater than or equal to the preset scale thickness threshold, the target ultrasonic frequency value of the cleaning device corresponding to the current scale thickness value is determined. The cleaning device is controlled to start operating at the target ultrasonic frequency value to clean the scale on the heating plate.

2. The method according to claim 1, characterized in that, The intelligent steam oven is also equipped with a temperature measuring circuit; the temperature measuring circuit includes an output chip, a sampling resistor, and the heating plate connected in series; when the intelligent steam oven completes the cooking task, acquiring the real-time temperature value of the heating plate and the preset scale thickness threshold corresponding to the heating plate includes: When the intelligent steam oven completes the cooking task, the preset scale thickness threshold, the output voltage value of the temperature measuring circuit, the sampling resistance value of the sampling resistor, and the sampling current value are obtained. The circuit resistance value is obtained by calculating the ratio between the output voltage value and the sampled current value. The current resistance value of the heating plate is obtained by calculating the difference between the circuit resistance value and the sampling resistance value. The temperature value that matches the current resistance value is found in the resistance-temperature relationship library to obtain the real-time temperature value of the heating plate; the resistance-temperature relationship library includes a preset mapping relationship between the resistance value of the heating plate and the preset temperature value.

3. The method according to claim 1, characterized in that, The step of acquiring the echo signal received by the thickness detection device based on the ultrasonic signal includes: The thickness detection device receives a first interface based on the ultrasonic signal and returns a first echo signal, and obtains a first receiving time corresponding to the first echo signal; the first interface is the interface between the heating plate and the scale on the heating plate. The thickness detection device receives the second interface based on the second echo signal returned by the ultrasonic signal, and obtains the second reception time corresponding to the second echo signal; the second interface is the interface between the scale on the heating plate and the water covering the surface of the scale.

4. The method according to claim 3, characterized in that, Before determining the scale thickness detection result on the heating plate based on the echo signal and the preset scale thickness threshold, the method further includes: The number of echo signals is determined based on the first echo signal and the second echo signal; The step of determining the scale thickness detection result on the heating plate based on the echo signal and the preset scale thickness threshold includes: Calculate the difference between the second reception time and the first reception time to obtain the target time difference; Obtain the target sound velocity of the thickness detection device; Calculate the product between the target sound velocity and the target time difference to obtain the initial scale thickness value; The ratio between the initial scale thickness value and the echo signal quantity value is calculated to obtain the current scale thickness value on the heating plate; The scale thickness detection result is determined based on the current scale thickness value and the preset scale thickness threshold.

5. The method according to claim 4, characterized in that, The preset scale thickness threshold includes a first preset scale thickness threshold and a second preset scale thickness threshold; the cleaning device is equipped with a first ultrasonic frequency value and a second ultrasonic frequency value; if the scale thickness detection result indicates that the current scale thickness value on the heating plate is greater than or equal to the preset scale thickness threshold, determining the target ultrasonic frequency value of the cleaning device corresponding to the current scale thickness value includes: If the current scale thickness value is greater than or equal to the first preset scale thickness threshold, and the current scale thickness value is less than the second preset scale thickness threshold, then the first ultrasonic frequency value is determined to be the target ultrasonic frequency value; the second preset scale thickness threshold is greater than the first preset scale thickness threshold. If the current scale thickness value is greater than or equal to the second preset scale thickness threshold, the second ultrasonic frequency value is determined to be the target ultrasonic frequency value; the second ultrasonic frequency value is greater than the first ultrasonic frequency value.

6. The method according to claim 3, characterized in that, The preset scale thickness threshold also includes a preset attenuation rate threshold; the step of determining the scale thickness detection result on the heating plate based on the echo signal and the preset scale thickness threshold further includes: Obtain the preset voltage value corresponding to the heating plate; the preset voltage value is the voltage value corresponding to the echo signal received by the thickness detection device when the heating plate is free of scale. The first echo signal is subjected to analog-to-digital conversion to obtain a set of voltage values; The target voltage value is obtained by filtering the set of voltage values. Calculate the difference between the target voltage value and the preset voltage value to obtain the voltage difference; Calculate the ratio between the voltage difference and the preset voltage value to obtain the current signal attenuation rate; The scale thickness detection result is determined based on the current signal attenuation rate and the preset attenuation rate threshold.

7. The method according to claim 6, characterized in that, The preset attenuation rate threshold includes a first preset attenuation rate threshold and a second preset attenuation rate threshold; after determining the scale thickness detection result on the heating plate based on the echo signal and the preset scale thickness threshold, the method further includes: If the current signal attenuation rate is greater than or equal to the first preset attenuation rate threshold, and the current signal attenuation rate is less than the second preset attenuation rate threshold, the first ultrasonic frequency value is determined to be the target ultrasonic frequency value; the second preset attenuation rate threshold is greater than the first preset attenuation rate threshold. If the current signal attenuation rate is greater than or equal to the second preset attenuation rate threshold, the second ultrasonic frequency value is determined to be the target ultrasonic frequency value.

8. The method according to claim 1, characterized in that, The intelligent steam oven also includes a water tank disposed opposite to the heating plate; the cleaning device is disposed in the water tank; controlling the cleaning device to start working at the target ultrasonic frequency value to clean the scale on the heating plate includes: Obtain the current water level value of the water tank; If the current water level is greater than or equal to a preset water level threshold, the cleaning device is controlled to start working at the target ultrasonic frequency value to generate cavitation bubbles in the water tank to clean the scale on the heating plate; the preset water level threshold is the lower limit value at which the heating plate is immersed in the liquid in the water tank.

9. A scale cleaning device for an intelligent steam oven, characterized in that, The intelligent steam oven is equipped with a heating plate, a thickness detection device, and a cleaning device. The device includes: The acquisition module is used to acquire the real-time temperature value of the heating plate and the preset scale thickness threshold corresponding to the heating plate when the smart steam oven completes the cooking task; the preset scale thickness threshold is the lower limit value of the scale thickness generated by the heating plate during cooking that triggers the cleaning task. An ultrasonic signal transmitting module is used to control the thickness detection device to send an ultrasonic signal to the heating plate if the real-time temperature value is greater than a preset temperature threshold. An echo signal acquisition module is used to acquire the echo signal received by the thickness detection device based on the ultrasonic signal; The scale thickness detection result determination module is used to determine the scale thickness detection result on the heating plate based on the echo signal and the preset scale thickness threshold. The target ultrasonic frequency value determination module is used to determine the target ultrasonic frequency value of the cleaning device corresponding to the current scale thickness value if the scale thickness detection result indicates that the current scale thickness value on the heating plate is greater than or equal to the preset scale thickness threshold. A cleaning module is used to control the cleaning device to start working at the target ultrasonic frequency value to clean the scale on the heating plate.

10. A smart steam oven, characterized in that, The intelligent oven is used to perform the scale cleaning method for the intelligent steam oven as described in any one of claims 1-8.

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