Steam oven purification device, steam oven purification control method and steam oven

Abstract

This application relates to a steam oven purification device, a steam oven purification control method, and a steam oven. The steam oven purification device includes a status detection module, a purification module, and a controller. The status detection module collects status information within the cooking cavity of the steam oven. The purification module includes two or more purification devices that provide different types of purification to the cooking cavity during operation. The purification module includes at least a stain cleaning device and a photocatalytic oxidation device. The controller receives and processes the status information and controls one or more purification devices in the purification module to operate according to the status information and a preset algorithm. When both the stain cleaning device and the photocatalytic oxidation device are operating, the photocatalytic oxidation device ends its operation later than the stain cleaning device. The purification method can be adjusted based on the actual conditions of the cooking cavity to deodorize residual volatiles after the stain cleaning device has worked, further improving the cleanliness of the cooking cavity and ensuring high reliability.

Description

Technical Field

[0001] This application relates to the field of kitchen appliance technology, and in particular to a steam oven purification device, a steam oven purification control method, and a steam oven. Background Technology

[0002] With the improvement of living standards, steam ovens have become common equipment in many home and commercial kitchens. Steam ovens can both steam and bake food, meeting diverse cooking needs.

[0003] However, after use, steam ovens often leave food residue, grease, and various odors inside. Traditional cleaning methods typically use a fixed, single cleaning mode, such as steam cleaning. However, this method suffers from problems such as incomplete or inadequate cleaning, and over-cleaning leading to energy waste. Therefore, traditional steam oven cleaning methods have low reliability. Summary of the Invention

[0004] Therefore, it is necessary to address the technical problem of low reliability in traditional steam oven cleaning methods by providing a steam oven purification device, steam oven purification control method, and steam oven that can improve the reliability of use.

[0005] In a first aspect, this application provides a steam oven purification device, comprising:

[0006] The status detection module is used to collect status information inside the cooking cavity of the steam oven;

[0007] The purification module includes two or more purification devices for purifying the cooking cavity in different ways during operation; the purification module includes at least a stain cleaning device and a photocatalytic oxidation device.

[0008] The controller, connected to the status detection module and the purification module, is used to receive and process the status information, and control one or more purification devices in the purification module to work according to the status information and a preset algorithm; when both the stain cleaning device and the photocatalytic oxidation device are working, the end time of the photocatalytic oxidation device is later than the end time of the stain cleaning device.

[0009] In one embodiment, the status detection module includes an odor detection device and a stain detection device connected to the controller, the stain cleaning device is used to clean stains in the cooking cavity, and the photocatalytic oxidation device is used to reduce odors in the cooking cavity;

[0010] The odor detection device is used to detect the concentration of odor gases in the cooking cavity, the stain detection device is used to detect stain information in the cooking cavity, and the controller is used to control the stain cleaning device and the photocatalytic oxidation device to work individually or in combination according to the odor gas concentration, the stain information and the preset algorithm.

[0011] In one embodiment, the controller is further configured to:

[0012] When the concentration of the odorous gas is greater than the preset gas concentration, the photocatalytic oxidation device is controlled to operate.

[0013] When the stain information indicates the presence of stains within the cooking cavity, the stain cleaning device is controlled to operate.

[0014] When the concentration of the odor gas is greater than the preset gas concentration, and the stain information indicates that there are stains in the cooking cavity, the stain cleaning device is controlled to work, and the photocatalytic oxidation device is controlled to work at the preset maximum power.

[0015] In one embodiment, the controller is further configured to:

[0016] The deodorization power of the photocatalytic oxidation device is adjusted according to the difference between the odor gas concentration and the preset gas concentration.

[0017] In one embodiment, the stain cleaning device includes a steam generator and an ultrasonic generator connected to the controller, the controller further being used for:

[0018] When the stain information indicates that the stains in the cooking cavity are light stains, the steam generator is controlled to operate;

[0019] When the stain information indicates that the stain in the cooking cavity is a stubborn stain, the steam generator and the ultrasonic generator are controlled to operate; the ultrasonic generator is disposed in the cooking cavity and is used to transmit vibration to the medium in the cooking cavity.

[0020] In one embodiment, the water tank of the steam generator stores solid photocatalyst particles.

[0021] In one embodiment, the controller is further configured to:

[0022] Based on the type of stain in the cooking cavity characterized by the stain information, the working time of the stain cleaning device is adjusted.

[0023] In one embodiment, the controller is further configured to:

[0024] During the operation of the purification module, it continuously receives status feedback information from the status detection module;

[0025] If the cleaning is deemed not to meet the standards based on the status feedback information, the working time or working device of the purification module is adjusted.

[0026] In one embodiment, a temperature detection device connected to the controller is further included. The temperature detection device is disposed within the cooking cavity and is used to detect the temperature of the cooking cavity and send it to the controller. The controller is further used to:

[0027] If the temperature of the cooking cavity exceeds a preset temperature threshold, the purification module will stop working.

[0028] In one embodiment, the controller is further configured to:

[0029] Obtain cooking history data;

[0030] When the status information or the cooking history data meets the preset cleaning trigger conditions, control one or more purification devices in the purification module to operate.

[0031] In one embodiment, the controller further includes an information interaction device connected to the controller, the information interaction device being used to receive cleaning instructions issued by a user, and the controller being further used to:

[0032] Upon receiving the cleaning instruction, the system controls one or more purification devices in the purification module to operate.

[0033] Secondly, this application also provides a steam oven purification control method, implemented based on the steam oven purification device of any of the above embodiments, the method comprising:

[0034] Receive and process status information; the status information is obtained by the status detection module.

[0035] The system controls one or more purification devices in the purification module to operate based on the status information and a preset algorithm.

[0036] In one embodiment, the method further includes:

[0037] During the operation of the purification module, it continuously receives status feedback information from the status detection module;

[0038] If the cleaning is deemed not to meet the standards based on the status feedback information, the working time or working device of the purification module is adjusted.

[0039] In one embodiment, the method further includes: acquiring cooking history data;

[0040] When the status information or the cooking history data meets the preset cleaning trigger conditions, control one or more purification devices in the purification module to operate.

[0041] Thirdly, this application also provides a steam oven, including the steam oven purification device as described above.

[0042] The aforementioned steam oven purification device, steam oven purification control method, and steam oven are described above. The steam oven purification device includes a status detection module, a purification module, and a controller. The status detection module collects status information within the cooking cavity of the steam oven. The purification module includes two or more purification devices to provide different types of purification to the cooking cavity during operation. The purification module includes at least a stain cleaning device and a photocatalytic oxidation device. The controller connects to the status detection module and the purification module, receives and processes status information, and controls one or more purification devices in the purification module to operate based on the status information and a preset algorithm. When both the stain cleaning device and the photocatalytic oxidation device are operating, the photocatalytic oxidation device's end time is later than the stain cleaning device's end time. By collecting status information within the cooking cavity of the steam oven through the status detection module, and controlling different purification devices in the purification module to operate individually or in combination based on a preset algorithm, the purification method can be adjusted according to the actual situation of the cooking cavity. The purification options are flexible and diverse, allowing for individual or combined cleaning of stains and deodorization of the cooking cavity, improving the comprehensiveness and effectiveness of purification, avoiding unnecessary energy consumption, and achieving intelligent purification without manual intervention. When both the stain cleaning device and the photocatalytic oxidation device are working, the photocatalytic oxidation device ends its operation later than the stain cleaning device. This allows for better removal of residual volatiles after the stain cleaning device has finished its operation, further improving the cleanliness of the cooking cavity and ensuring high reliability. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a schematic diagram of the structural block of a steam oven purification device in one embodiment;

[0045] Figure 2 This is a schematic diagram of the structural block of the steam oven purification device in another embodiment;

[0046] Figure 3This is a schematic diagram of the structural block of the steam oven purification device in another embodiment;

[0047] Figure 4 This is a flowchart illustrating the purification control method for a steam oven in one embodiment;

[0048] Figure 5 This is a flowchart illustrating the purification control method for a steam oven in another embodiment;

[0049] Figure 6 This is a flowchart illustrating the purification control method for a steam oven in yet another embodiment;

[0050] Figure 7 This is a flowchart illustrating the purification control method for a steam oven in another embodiment;

[0051] Figure 8 This is a detailed flowchart illustrating the purification control method for a steam oven in one embodiment;

[0052] Figure 9 This is a partial flowchart of a steam oven purification control method in one embodiment. Detailed Implementation

[0053] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0055] It is understood that the terms "first," "second," etc., used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0056] It is understood that the term "connection" in the following embodiments should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have electrical signal or data transmission with each other.

[0057] It is understandable that "at least one" refers to one or more, and "multiple" refers to two or more. "At least a part of an element" refers to part or all of an element.

[0058] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0059] This application provides a steam oven purification device for purifying a steam oven, specifically for purifying the cooking cavity of the steam oven. The steam oven purification device can be integrated inside the steam oven. Purifying the steam oven refers to improving its cleanliness through various measures.

[0060] In one embodiment, such as Figure 1 As shown, the steam oven purification device includes a status detection module 10, a purification module 20, and a controller 30. The status detection module 10 is used to collect status information inside the cooking cavity of the steam oven. The purification module 20 includes two or more purification devices for different types of purification of the cooking cavity during operation. The purification module 20 includes at least a stain cleaning device 22 and a photocatalytic oxidation device 24. The controller 30 is connected to the status detection module 10 and the purification module 20, and is used to receive and process status information, and control one or more purification devices in the purification module 20 to work according to the status information and a preset algorithm. When both the stain cleaning device 22 and the photocatalytic oxidation device 24 are working, the end time of the photocatalytic oxidation device 24 is later than the end time of the stain cleaning device 22. The status detection module 10 collects status information from the cooking cavity of the steam oven, and the controller 30, based on a preset algorithm, controls different purification devices in the purification module 20 to work individually or in combination. The purification method can be adjusted according to the actual situation of the cooking cavity, offering flexible and diverse purification options. It can clean stains individually or in combination, and deodorize the cooking cavity, improving the comprehensiveness and effectiveness of purification while avoiding unnecessary energy consumption. Furthermore, it requires no manual intervention, achieving intelligent purification. When both the stain cleaning device and the photocatalytic oxidation device are working, the photocatalytic oxidation device ends its operation later than the stain cleaning device, allowing for better deodorization of residual volatiles after the stain cleaning device's operation, further improving the cleanliness of the cooking cavity and ensuring high reliability.

[0061] The status detection module 10 is used to collect status information within the cooking cavity of the steam oven. The cooking cavity is the cavity used to hold and cook food. The status detection module 10 can be installed within the cooking cavity to detect its status and collect status information. This status information may include information characterizing the cleanliness of the cooking cavity. It can also include various types of information to provide a more comprehensive monitoring of the cooking cavity's status. The status detection module 10 can collect status information in real time, at a preset cycle, or upon receiving a collection command, depending on actual needs.

[0062] The purification module 20 includes two or more purification devices, which are used to perform different types of purification on the cooking cavity during operation. The purification module 20 is typically located within the cooking cavity, and depending on the type of purification devices it includes, it can be positioned at different locations within the cooking cavity. The purification module 20 may include a collection of various purification devices used for purifying the cooking cavity. In this application, the purification module 20 includes two or more different types of purification devices, facilitating intelligent combined cleaning.

[0063] Furthermore, the purification module 20 includes at least a stain cleaning device 22 and a photocatalytic oxidation device 24 connected to the controller 30. The stain cleaning device 22 is used to clean stains in the cooking cavity, and the photocatalytic oxidation device 24 is used to reduce odors in the cooking cavity.

[0064] The stain cleaning device 22 is used to physically remove stains adhering to the inner surface of the cooking cavity, separating the stains from the inner wall of the cooking cavity. The type of stain cleaning device 22 is not limited; for example, it can be a high-pressure water spray system. The location of the stain cleaning device 22 within the cooking cavity is not limited and can be determined according to the type of stain cleaning device 22.

[0065] The photocatalytic oxidation device 24 typically includes an ultraviolet lamp (UV lamp) and a photocatalyst coating (usually nano-titanium dioxide). In this embodiment, the photocatalyst coating is applied to the inner wall of the cooking cavity. The photocatalytic oxidation device operates as follows: the UV lamp irradiates the catalyst surface, exciting it to generate electron-hole pairs, which then react with water molecules and oxygen in the air to generate hydroxyl radicals (·OH) with extremely strong oxidizing power. These radicals can non-selectively oxidize and decompose odorous organic molecules (such as formaldehyde, benzene, and cooking fume molecules) into harmless carbon dioxide and water. The UV lamp is connected to a controller 30 so that the controller 30 can control the lamp's on / off state and illumination state. The photocatalytic oxidation device can decompose odor molecules into harmless substances, fundamentally eliminating the odor source and achieving a permanent, consumable-free odor removal solution.

[0066] The controller 30 is typically located inside the electrical control box within the steam oven body, integrated with the main control board, or exists as a separate coprocessor board. The steam oven's purification device can be powered by the main power supply of the steam oven, and the controller 30 manages the power distribution of each module. The controller 30 is typically a microcontroller unit (MCU), a programmable logic controller (PLC), or an intelligent control board containing a processor. Its core functions are receiving information, processing data, running algorithms, and issuing control commands.

[0067] The controller 30 connects to the status detection module 10 and the purification module 20 in the following ways: the output terminal of the status detection module 10 is electrically connected to the input terminal of the controller 30 via a wiring harness or wireless communication module, for uploading the collected status information data to the controller 30. The output terminal of the controller 30 is electrically connected to the control terminals of each purification device in the purification module 20, for sending control commands such as start, stop, and intensity adjustment to these purification devices.

[0068] The preset algorithm is program logic pre-written and stored in the memory of the controller 30. It can be a set of conditional judgment rules or a more complex decision model based on sensor data fusion, used to determine which control command to output based on the input state information. The preset algorithm can be updated and upgraded in the cloud via over-the-air download technology, thereby continuously optimizing the cleaning strategy and adapting to new use cases.

[0069] The working process of the steam oven purification device includes: After the user finishes cooking, the steam oven enters standby mode. The status detection module 10 starts working and collects status information inside the cooking cavity. The status detection module 10 converts the real-time collected information into electrical signals and transmits them to the controller 30 through a communication line. After receiving the status information, the controller 30 calls its internally stored preset algorithm to analyze and process the data. The algorithm assesses the current level and type of contamination in the cooking cavity. Based on the algorithm's output, the controller 30 generates corresponding purification control commands. These commands are not fixed but dynamically select one or more purification devices in the purification module 20 to operate.

[0070] For example, if the status information indicates that there is only slight moisture in the cooking cavity, the controller 30, based on the status information and a preset algorithm, will control the hot air drying device in the purification module 20 to operate for 5 minutes. If the status information indicates that there are stains in the cooking cavity, the controller 30, based on the status information and a preset algorithm, will control the steam generator 222 in the purification module 20 to operate for 8 minutes to soften the stains and reduce their adhesion to the inner wall of the cooking cavity. After the preset working time is reached or the stop condition determined by the algorithm is met, the controller 30 issues a stop command, all operating purification devices stop running, and the system returns to standby mode.

[0071] When both the stain cleaning device 22 and the photocatalytic oxidation device 24 are operating, the photocatalytic oxidation device 24 stops operating later than the stain cleaning device 22. During the stain cleaning process of the stain cleaning device 22, some odorous volatiles may be generated. Therefore, when both the stain cleaning device 22 and the photocatalytic oxidation device 24 are operating, after the stain cleaning device 22 stops operating, the photocatalytic oxidation device 24 continues to run for a period of time (e.g., 3-5 minutes) to complete the cleaning-deodorizing process. This further deodorizes the volatiles remaining in the cooking cavity, reduces the possibility of odor recurrence, and improves the cleanliness of the cooking cavity.

[0072] In this embodiment, the status detection module 10 collects the status information inside the cooking cavity of the steam oven, and the controller 30 controls one or more purification devices in the purification module 20 to work based on a preset algorithm. This changes the fixed and single cleaning mode of traditional steam ovens, allowing the steam oven purification device to make autonomous decisions based on real-time data, achieving intelligent cleaning. By combining multiple purification devices, the most effective treatment method can be adopted for different pollution conditions. The purification options are flexible and diverse, allowing for individual or combined cleaning of stains and deodorization of the cooking cavity, improving the comprehensiveness and effectiveness of purification, resulting in a more thorough cleaning and reducing unnecessary energy waste. The photocatalytic oxidation device can decompose odor molecules into harmless substances, fundamentally eliminating the odor source and achieving a permanent, consumable-free deodorization solution. Users do not need to worry about which cleaning mode to use; the steam oven purification device can automatically complete all judgments and operations, greatly simplifying the operation steps and improving the convenience of product use. When both the stain cleaning device and the photocatalytic oxidation device are working, the photocatalytic oxidation device ends its operation later than the stain cleaning device. This allows for better removal of residual volatiles after the stain cleaning device has finished its operation, further improving the cleanliness of the cooking cavity.

[0073] The structure of the state detection module 10 is not unique. In one exemplary embodiment, such as... Figure 2 As shown, the status detection module 10 includes an odor detection device 12 and a stain detection device 14 connected to the controller 30. The odor detection device 12 is used to detect the concentration of odor gases in the cooking cavity and send the data to the controller 30. The stain detection device 14 is used to detect stain information in the cooking cavity and send it to the controller 30. The controller 30 is used to control the stain cleaning device 22 and the photocatalytic oxidation device 24 to operate individually or in combination based on the odor gas concentration, stain information, and a preset algorithm.

[0074] The odor detection device 12 can detect the concentration of odor gases within the cooking cavity and convert it into a quantifiable electrical signal. The odor detection device 12 can use laser to detect the size and concentration of gas particles, reflecting the odor concentration through the size of the gas particles. The location of the odor detection device 12 within the cooking cavity is not limited; for example, it can be placed at the top rear or side of the cooking cavity near the exhaust vent, where airflow is good and the overall air quality within the cooking cavity can be more accurately reflected. The type of odor detection device 12 is not limited; for example, it can be a metal oxide semiconductor sensor, an electrochemical sensor, or a laser scattering sensor to detect odor components such as VOCs (volatile organic compounds), ammonia, and hydrogen sulfide.

[0075] The stain detection device 14 can detect the presence or absence of stains inside the cooking cavity. In some embodiments, the stain detection device 14 can also detect the type, area, or thickness of the stains. The type of stain detection device 14 is not limited; for example, it can be an image acquisition device, a spectral analysis device, etc. The placement of the stain detection device 14 inside the cooking cavity is not limited and can be determined according to its type. For example, if the stain detection device 14 is an image acquisition device, it can be placed on the top side wall inside the cooking cavity so that the viewing angle of the image acquisition device can cover the entire cooking cavity as much as possible.

[0076] The outputs of odor detection device 12 and stain detection device 14 are respectively connected to different ADC (Analog-to-Digital Converter) or communication interfaces of controller 30, and the controlled ends of stain cleaning device 22 and photocatalytic oxidation device 24 are respectively connected to different output ports of controller 30. Controller 30 is the control center, which controls stain cleaning device 22 and photocatalytic oxidation device 24 to work individually or in combination according to odor gas concentration, stain information and preset algorithm.

[0077] For example, the odor detection device 12 monitors the VOC concentration (unit: ppm or ppb) inside the cooking cavity in real time, while the stain detection device 14 scans the cavity and generates stain information. These two different data sets are simultaneously uploaded to the controller 30, where a built-in preset algorithm fuses and analyzes the two types of information to make a decision. A purification action is triggered whenever either condition is met. For example, if the stain information indicates no stains but the VOC concentration is excessive, the photocatalytic oxidation device 24 is activated. Alternatively, if the stain information indicates the presence of stains but the VOC concentration is low, the stain cleaning device 22 is activated.

[0078] In this embodiment, the status detection module 10 includes an odor detection device 12 and a stain detection device 14 connected to the controller 30. The odor detection device 12 detects the concentration of odor gases in the cooking cavity and sends the data to the controller 30. The stain detection device 14 detects stain information in the cooking cavity and sends it to the controller 30. The controller 30 controls the stain cleaning device 22 and the photocatalytic oxidation device 24 to operate individually or in combination based on the odor gas concentration, stain information, and a preset algorithm. Separating cleaning and deodorization enables more precise control. The steam oven purification device can deodorize independently, avoiding unnecessary cleaning energy consumption; it can also clean independently, handling odorless stains, thus improving the applicability and reliability of the steam oven purification device.

[0079] In an exemplary embodiment, the controller 30 is further configured to: control the photocatalytic oxidation device 24 to operate when the odor gas concentration is greater than a preset gas concentration; control the stain cleaning device 22 to operate when the stain information indicates that there are stains in the cooking cavity; and control the stain cleaning device 22 to operate and control the photocatalytic oxidation device 24 to operate at a preset maximum power when the odor gas concentration is greater than a preset gas concentration and the stain information indicates that there are stains in the cooking cavity.

[0080] The preset gas concentration is a threshold value that has been experimentally determined and stored in the memory of the controller 30. This value represents the critical point of odor intensity that the system deems necessary for intervention; for example, the preset gas concentration is set to 50 ppb (parts per billion). When the detected odor gas concentration exceeds this threshold, it can be determined that the odor exceeds the standard.

[0081] If the concentration of odorous gas exceeds the preset concentration, indicating excessive odor, the controller activates the photocatalytic oxidation device to decompose and remove the odor. If the stain information indicates the presence of stains in the cooking cavity, the controller activates the stain cleaning device to clean the stains.

[0082] In addition, when the concentration of odor gas is greater than the preset gas concentration and the stain information indicates that there are stains in the cooking cavity, the stain cleaning device is controlled to work, and the photocatalytic oxidation device is controlled to work at the preset maximum power.

[0083] The preset maximum power refers to the maximum power that the photocatalytic oxidation device can achieve under a given structure, and it can generally be determined at the factory.

[0084] When the stain cleaning device is initially activated, it rapidly softens and evaporates grease, food residue, and other stains adhering to the inner wall of the cooking cavity, which may cause a sharp increase in odor concentration within a short period. Therefore, the controller should activate the photocatalytic oxidation device at the preset maximum power (such as the highest fan speed and full UV lamp illumination) immediately upon or slightly after activating the stain cleaning device to address the anticipated odor burst and improve the deodorization effect.

[0085] Furthermore, in an exemplary embodiment, the controller is also configured to: adjust the deodorization power of the photocatalytic oxidation device according to the difference between the odor gas concentration and the preset gas concentration.

[0086] The controller 30 continuously reads data from the odor detection device 12 and the stain detection device 14, and the program of the controller 30 continuously executes two independent condition judgment threads:

[0087] Thread 1: Odor Detection

[0088] The controller 30 obtains the real-time value of the odor gas concentration from the odor detection device 12, and calls the preset gas concentration value in memory. If it determines that the odor gas concentration is greater than the preset gas concentration, the controller 30 immediately sends a start command to the photocatalytic oxidation device 24, and the photocatalytic oxidation device 24 starts working. Furthermore, the preset gas concentration may include multiple values. Based on the difference between the real-time odor gas concentration and different preset gas concentrations, the controller 30 can adjust the deodorization power of the photocatalytic oxidation device 24 to achieve on-demand deodorization and dynamically adjust the deodorization effect.

[0089] Thread 2: Stain detection:

[0090] The controller 30 obtains the results from the stain detection device 14. If the results indicate the presence of stains, the controller 30 immediately sends a start command to the stain cleaning device 22, and the cleaning device begins to work.

[0091] If both conditions are met simultaneously, the controller 30 will control the photocatalytic oxidation device 24 and the stain cleaning device 22 to start simultaneously and work in parallel.

[0092] In this embodiment, the photocatalytic oxidation device 24 is activated when the odor gas concentration exceeds a preset gas concentration; the stain cleaning device 22 is activated when stain information indicates the presence of stains within the cooking cavity. By separating the triggering conditions for the deodorization and cleaning tasks, the steam oven purification device can clearly address a single problem (either only odor or only stains), avoiding functional coupling and interference. Furthermore, a quick response can be made through simple threshold comparison, reducing the computational load on the controller 30 and resulting in a more timely response.

[0093] In one exemplary embodiment, such as Figure 3 As shown, the stain cleaning device 22 includes a steam generator 222 and an ultrasonic generator 224 connected to the controller 30. The controller 30 is also used to: control the steam generator 222 to work when the stain information indicates that the stain in the cooking cavity is a light stain; and control the steam generator 222 and the ultrasonic generator 224 to work when the stain information indicates that the stain in the cooking cavity is a stubborn stain.

[0094] The steam generator 222 is typically installed at the bottom of the cooking cavity, introducing steam into the cavity through a nozzle. The steam generator 222 produces high-temperature steam by heating water. Its cleaning mechanism primarily utilizes high temperature and humidity to soften and expand grease and food residue, causing them to peel off from the cavity surface, where they are then carried away by the flushing action of condensate water.

[0095] An ultrasonic generator 224 is typically installed inside the cooking cavity, such as on the inner wall or bottom, to efficiently transmit the vibrations generated by the ultrasonic generator 224 into the medium within the cooking cavity. The ultrasonic generator 224 generates shock waves through high-frequency vibrations, which can peel off and break up softened but still stubbornly attached stains within the cooking cavity, improving the stain cleaning effect.

[0096] Light stains refer to stains that are not strongly adhered and are easy to remove, such as fresh water droplets, small amounts of dust, slight limescale buildup, or small, undried oil droplets. These stains can usually be removed with a simple rinse or softening. Stubborn stains refer to hard stains that have been baked at high temperatures, adhered for a long time, and undergone chemical changes, such as carbonized oil stains, burnt sugar stains, hardened protein residue, and heavy limescale. These stains are difficult to remove completely with steam alone and require mechanical assistance.

[0097] After the stain detection device 14 detects stain information, the controller 30 analyzes the stain information to determine the stain type. If the stain is identified as light, the controller 30 activates the steam generator 222. If the stain is identified as stubborn, the controller controls the steam generator 222 and the ultrasonic generator 224 to work to enhance cleaning ability. Furthermore, when the controller 30 controls the steam generator 222 and the ultrasonic generator 224 to work, it first activates the steam generator 222 and operates it for a longer time preset for stubborn stains to fully soften the stain layer.

[0098] After the steam stage ends, or when the steam stage is about to end, restart the ultrasonic generator 224 for a period of time to use the cavitation effect to thoroughly crush and peel off the softened stubborn stains.

[0099] In this embodiment, the stain cleaning device 22 includes a steam generator 222 and an ultrasonic generator 224 connected to a controller 30. The controller 30 is further configured to: control the steam generator 222 to operate when the stain information indicates that the stains in the cooking cavity are light stains; and control both the steam generator 222 and the ultrasonic generator 224 to operate when the stain information indicates that the stains in the cooking cavity are stubborn stains. For light stains, the low-energy steam function is used, saving the higher energy consumption of the ultrasonic function. The ultrasonic generator 224 is only activated for high-intensity cleaning when dealing with stubborn stains, extending the service life of the device.

[0100] In one exemplary embodiment, the water tank of the steam generator stores solid photocatalyst particles. The solid photocatalyst particles may be TiO2 particles.

[0101] The steam generator's water tank stores solid photocatalyst particles, ensuring that the steam produced carries trace amounts of catalyst components when the generator is operating. This catalyst-laden steam, injected into the cooking cavity, not only physically softens stains, but also allows the catalyst to adhere to various surfaces of the cavity, including the stains, with some remaining suspended and permeating the cavity. Subsequently, when the UV lamp of the photocatalytic oxidation device is activated, it irradiates not only the coating on the inner wall of the cooking cavity but also the catalyst already attached to the stains, achieving in-situ catalytic oxidation and efficiently decomposing the odor molecules emitted by the stains at close range. Furthermore, the UV lamp may also irradiate the catalyst permeating the cooking cavity, expanding the deodorization area and improving deodorization efficiency.

[0102] In this embodiment, the water tank of the steam generator stores solid photocatalyst particles. This allows the steam used by the steam generator to become a carrier for the deodorizing catalyst, combining physical cleaning and chemical deodorization at the molecular level, further improving the deodorization effect.

[0103] In one exemplary embodiment, the controller 30 is also configured to: adjust the operating time of the stain cleaning device 22 based on the type of stain in the cooking cavity characterized by stain information.

[0104] Stains vary in chemical composition and physical properties, resulting in different stain types. For example, stain types may include oil stains, water stains, dust, and stubborn stains (such as charred residue).

[0105] Different types of stains have different cleaning difficulties and require different cleaning intensities. After analyzing the stain information to determine the stain type, the controller 30 adjusts the working time of the stain cleaning device 22 according to the stain type to perform stain cleaning for different durations for different stain types, thereby improving the cleaning effect.

[0106] Taking the stain cleaning device 22, which includes a steam generator 222 and an ultrasonic generator 224, as an example, if the stain is oil, which is difficult to remove and requires prolonged steam softening, the controller 30 can control the steam generator 222 to operate for a longer period of 8-10 minutes. If the stain is water or light dust, which is easy to evaporate and has low adhesion, the controller 30 can control the steam generator 222 to operate for a shorter period of 3-5 minutes. If the stain is stubborn, the controller 30 can first control the steam generator 222 to operate for 10 minutes, and then control the ultrasonic generator 224 to operate for 5 minutes, combining the two cleaning methods to improve cleaning power. Extendably, if the stain information indicates no obvious stains and the odor gas concentration is greater than the preset gas concentration, the photocatalytic oxidation device 24 can be controlled to operate for 5-10 minutes.

[0107] In this embodiment, the working time of the stain cleaning device 22 is adjusted based on the type of stain in the cooking cavity as characterized by stain information. Different cleaning times are matched for different stains, thus optimizing time utilization while ensuring cleaning effectiveness.

[0108] In one exemplary embodiment, the stain detection device 14 is an image acquisition device.

[0109] The image acquisition device can be an infrared camera, which generates a thermal image by capturing infrared radiation from the surface of an object. Different types of stains (such as grease, limescale, and sugar stains) exhibit unique temperature distributions and texture features in the thermal image due to their different heat capacities and thermal conductivity, making them easier for algorithms to distinguish and identify. The controller 30 can use image recognition algorithms (such as CNN) to analyze the inner wall image captured by the infrared camera to obtain stain information and identify the stain type (such as grease, limescale, food residue, etc.) based on the stain information. The image acquisition device can be positioned at the center of the top or the front side wall of the cooking cavity, allowing for a more comprehensive and better view of the stain information inside the cooking cavity. The data output terminal of the image acquisition device is connected to the corresponding input interface of the controller 30 for transmitting the acquired image data.

[0110] In this embodiment, the stain detection device 14 is an image acquisition device, which can collect comprehensive stain information and improve the accuracy of stain recognition.

[0111] In an exemplary embodiment, the controller 30 is further configured to: continuously receive status feedback information from the status detection module 10 during the operation of the purification module 20; and adjust the working time or working device of the purification module 20 if the cleaning is deemed not to meet the standard based on the status feedback information.

[0112] The status feedback information refers to the real-time data collected and transmitted back to the controller 30 by the status detection module 10 during or after the operation of the purification module 20. It is used to evaluate the effectiveness of the current cleaning cycle and is dynamic data corresponding to the initial status information.

[0113] "Cleaning not up to standard" refers to a negative judgment made by the controller 30 after comparing the received status feedback information with the preset cleaning standards. For example, after cleaning the steam generator 222, the stain information, after algorithm analysis, shows that more than 5% of the stains remain; or after the photocatalytic oxidation device removes odors, the odor detection device 12 reports that the concentration of odor gas is still greater than the preset gas concentration.

[0114] If the cleaning standard is not met based on status feedback, the operating time of the purification module 20 or the operating device is adjusted. Adjusting the operating time of the purification module 20 means extending the running time of one or more purification devices currently operating in the current cleaning mode, while keeping the current cleaning mode unchanged. For example, if the standard is not met after 10 minutes of initial steam cleaning, the steam time is extended by 5 minutes.

[0115] The device for adjusting operation refers to changing the combination of purification devices currently in operation. For example, if the standard is not met after steam cleaning, the ultrasonic generator 224 is automatically activated; or if the deodorization effect is not good, the device switches from a single activated carbon mode to a combination mode of activated carbon + photocatalytic oxidation device.

[0116] In this embodiment, during the operation of the purification module 20, it continuously receives status feedback information from the status detection module 10. If the status feedback information indicates that the cleaning has not met the standards, the working time or operating device of the purification module 20 is adjusted. This achieves closed-loop control, enabling it to adapt to differences in cleaning effects caused by different water qualities and different stain compositions, thus improving its intelligence and reliability.

[0117] In an exemplary embodiment, the steam oven purification device further includes a temperature detection device connected to the controller 30. The temperature detection device is disposed in the cooking cavity and is used to detect the temperature of the cooking cavity and send it to the controller 30. The controller 30 is also used to control the purification module 20 to stop working when the temperature of the cooking cavity is greater than a preset temperature threshold.

[0118] The temperature detection device refers to a temperature sensor, such as a thermocouple or thermistor, installed inside the cooking cavity to monitor its internal temperature in real time. Its output is an analog voltage or resistance signal proportional to the temperature value. The preset temperature threshold is a maximum permissible temperature limit (such as 90°C or 100°C) set to protect the device. This value is typically lower than the maximum withstand temperature of the oven's inner liner and electronic components, allowing for a safety margin.

[0119] Throughout the cleaning process, the controller 30 continuously reads the temperature values ​​of the cooking cavity detected by the temperature detection device. If the temperature of the cooking cavity exceeds the preset temperature threshold, the controller 30 immediately issues an emergency stop command to all operating purification devices (such as the steam generator 222, UV lamp, and ultrasonic generator 224), cutting off their power and controlling the purification module 20 to stop working.

[0120] In an expandable manner, the controller 30 can also issue an overheating alarm to the user via an information interaction device (such as a display screen or a buzzer) to prompt the user to check the equipment.

[0121] In this embodiment, the steam oven purification device also includes a temperature detection device connected to the controller 30. The temperature detection device is located inside the cooking cavity and is used to detect the temperature of the cooking cavity and send it to the controller 30. The controller 30 is also used to control the purification module 20 to stop working when the temperature of the cooking cavity exceeds a preset temperature threshold. This fundamentally reduces the risk of fire, damage to electronic components, or permanent damage to the coating of the inner liner of the cooking cavity caused by overheating of the equipment during the cleaning process, thus improving safety and reliability.

[0122] In an exemplary embodiment, the controller 30 is further configured to: acquire cooking history data; and control one or more purification devices in the purification module 20 to operate when the status information or cooking history data meets preset cleaning trigger conditions.

[0123] Cooking history data refers to data records about the past use of the steam oven stored in the non-volatile memory of the controller 30. Cooking history data may include: cooking mode (steaming, baking, frying), set temperature, duration, actual temperature profile, number of cleaning cycles, etc.

[0124] The preset cleaning trigger conditions are rules that are logically set based on historical data and are used to predict potential cleaning needs.

[0125] After each cooking cycle, the controller 30 automatically adds the key parameters of that cooking cycle to the historical data record. During standby after each cooking cycle, or at fixed time points, the controller 30 checks whether the cooking history data meets any preset cleaning trigger conditions. Once the conditions are met, even if the status information indicates that the cooking cavity is clean, the system will automatically start the cleaning program, controlling one or more purification devices in the purification module 20 to operate.

[0126] For example, if a user uses the steam oven more than 3 times in a row, with the temperature exceeding 150℃ each time, and the oven does not enter the cleaning state within those 3 times, the system will automatically determine it as "high risk of contamination" and start the cleaning program.

[0127] Alternatively, the preset cleaning trigger conditions can also include conditions corresponding to the status information. For example, preset cleaning trigger conditions may include an odor gas concentration greater than a preset gas concentration, or stain information indicating the presence of stains in the cooking cavity. When the status information meets the preset cleaning trigger conditions, the cleaning program is initiated, controlling one or more purification devices in the purification module 20 to operate. The specific process has been explained above and will not be repeated here.

[0128] In this embodiment, cooking history data is acquired; when the status information or cooking history data meets the preset cleaning trigger conditions, one or more purification devices in the purification module 20 are controlled to operate. This allows cleaning to be initiated during periods of high contamination risk, achieving predictive maintenance. Even when the user is unaware or forgets to clean, the system can proactively provide cleaning, improving the intelligence level of the steam oven's purification device.

[0129] In an exemplary embodiment, the steam oven purification device further includes an information interaction device connected to the controller 30. The information interaction device is used to receive cleaning instructions issued by the user. The controller 30 is also used to control one or more purification devices in the purification module 20 to operate after receiving the cleaning instructions.

[0130] The information interaction device refers to all input and output devices that allow users to send commands to the steam oven and for the steam oven to provide feedback to the user. This includes hardware devices (touchscreens, physical buttons, knobs, LED indicators, voice microphones) and software devices (mobile apps, smart speaker integration).

[0131] A cleaning instruction is a clear signal issued by a user through any of the aforementioned information interaction devices, indicating an intention to initiate a cleaning procedure.

[0132] While the steam oven is in standby mode, the user can generate a cleaning command via the information interaction device. This cleaning command is then sent to the controller 30. Upon receiving the cleaning command, the controller 30 places it with the highest priority. It can process the command in two ways:

[0133] Method A (Direct Execution): Immediately initiates a preset, comprehensive cleaning program (such as "Intensive Cleaning Mode"), controlling one or more purification devices in the purification module 20 to operate.

[0134] Method B (Intelligent Execution): The status detection module 10 is still activated first for a rapid assessment. Then, based on the assessment results, the most suitable cleaning strategy is executed, controlling one or more purification devices in the purification module 20 to operate. However, the entire process is automatic and requires no user selection. It's equivalent to the user triggering intelligent cleaning with a command.

[0135] In an expandable manner, after the controller 30 controls one or more purification devices in the purification module 20 to operate, it can also control the information interaction device to issue a prompt message to remind the user that the instruction has been received and intelligent cleaning has begun.

[0136] In this embodiment, the steam oven purification device also includes an information interaction device connected to the controller 30. This information interaction device receives cleaning commands from the user. The controller 30 is also used to control one or more purification devices in the purification module 20 to operate after receiving a cleaning command. This provides a direct and simple start-up method, satisfying the usage habits of different users.

[0137] In one embodiment, a steam oven purification control method is also provided, implemented based on the steam oven purification device of any of the above embodiments. This steam oven purification control method can be executed by the controller of the steam oven purification device, or by a terminal or server communicatively connected to the controller. The following description takes the execution of the steam oven purification control method by the controller as an example. Figure 4 As shown, the steam oven purification control method includes steps 402 to 404. Wherein:

[0138] Step 402: Receive and process status information.

[0139] The status information is obtained by a status detection module. This module can be installed inside the cooking cavity to detect its status and collect status information. The status information may include information characterizing the cleanliness of the cooking cavity. It can include various types of information to provide a more comprehensive monitoring of the cooking cavity's status. The status detection module can collect status information in real time, at a preset period, or upon receiving a collection command, depending on actual needs.

[0140] Step 404: Control one or more purification devices in the purification module to operate according to the status information and preset algorithm.

[0141] The preset algorithm is a program logic pre-written and stored in the controller's memory. It can be a set of conditional judgment rules or a more complex decision model based on sensor data fusion, used to determine which control command to output based on the input state information. The preset algorithm can be updated and upgraded in the cloud via over-the-air (OTA) download technology, thereby continuously optimizing the cleaning strategy and adapting to new use cases.

[0142] The working process of the steam oven purification device includes: After the user finishes cooking, the steam oven enters standby mode. The status detection module starts working and collects status information inside the cooking cavity. The status detection module converts the real-time collected information into electrical signals and transmits them to the controller via a communication line. After receiving the status information, the controller calls its internally stored preset algorithm to analyze and process the data. The algorithm assesses the current level and type of contamination in the cooking cavity. Based on the algorithm's output, the controller generates corresponding purification control commands. These commands are not fixed but dynamically select one or more purification devices from the purification module to operate.

[0143] For example, if the status information indicates that there is only slight moisture in the cooking cavity, the controller, based on the status information and a preset algorithm, will activate the hot air drying device in the purification module for 5 minutes. If the status information indicates that there are stains in the cooking cavity, the controller, based on the status information and a preset algorithm, will activate the steam generator in the purification module for 8 minutes to soften the stains and reduce their adhesion to the inner wall of the cooking cavity. After the preset working time is reached or the stop condition determined by the algorithm is met, the controller issues a stop command, all operating purification devices stop running, and the system returns to standby mode.

[0144] In this embodiment, status information is received and processed, and one or more purification devices in the purification module are controlled to operate based on the status information and a preset algorithm. By combining multiple purification devices, the most effective treatment method can be adopted for different pollution conditions, resulting in a more thorough cleaning effect and reducing unnecessary energy waste. Users do not need to worry about which cleaning mode to use; the steam oven purification device can automatically complete all judgments and operations, greatly simplifying the operation steps and improving the convenience of product use.

[0145] In one exemplary embodiment, the state detection module includes an odor detection device and a stain detection device connected to the controller, and the purification module includes a stain cleaning device and a photocatalytic oxidation device connected to the controller. Figure 5 As shown, step 404 includes step 504: controlling the stain cleaning device and the photocatalytic oxidation device to work individually or in combination based on the odor gas concentration, stain information and preset algorithm.

[0146] In one exemplary embodiment, such as Figure 6 As shown, step 504 includes step 604: when the odor gas concentration is greater than the preset gas concentration, control the photocatalytic oxidation device to work; when the stain information indicates that there are stains in the cooking cavity, control the stain cleaning device to work; when the odor gas concentration is greater than the preset gas concentration and the stain information indicates that there are stains in the cooking cavity, control the stain cleaning device to work and control the photocatalytic oxidation device to work at the preset maximum power.

[0147] In an exemplary embodiment, when the odor gas concentration is greater than a preset gas concentration, the step of controlling the operation of the photocatalytic oxidation device includes the step of adjusting the deodorization power of the photocatalytic oxidation device according to the difference between the odor gas concentration and the preset gas concentration.

[0148] In an exemplary embodiment, the stain cleaning device includes a steam generator and an ultrasonic generator connected to a controller, and step 604 includes the steps of: controlling the steam generator to operate when the stain information indicates that the stain in the cooking cavity is a light stain; and controlling the steam generator and the ultrasonic generator to operate when the stain information indicates that the stain in the cooking cavity is a stubborn stain.

[0149] In one exemplary embodiment, the steam oven purification control method further includes the step of: adjusting the working time of the stain cleaning device based on the type of stain in the cooking cavity characterized by stain information.

[0150] In one exemplary embodiment, such as Figure 7 As shown, after step 404, the steam oven purification control method further includes steps 702 and 704, wherein:

[0151] Step 702: During the operation of the purification module, continuously receive status feedback information from the status detection module.

[0152] Step 704: If the cleaning is deemed not to meet the standards based on the status feedback information, adjust the working time of the purification module or the device in operation.

[0153] The status feedback information refers to the real-time data collected and transmitted back to the controller by the status detection module during or after the cleaning module's operation. It is used to evaluate the effectiveness of the current cleaning cycle and is dynamic data corresponding to the initial status information.

[0154] "Cleaning not up to standard" refers to a negative judgment made by the controller after comparing the received status feedback information with the preset cleaning standards. For example, after cleaning the steam generator, the algorithm analysis shows that more than 5% of the stains remain; or after the photocatalytic oxidation device removes odors, the odor detection device reports that the concentration of odor gas is still higher than the preset concentration.

[0155] If the cleaning standard is not met based on status feedback, adjust the operating time of the purification module or the operating device. Adjusting the operating time of the purification module means extending the running time of one or more purification devices currently operating in that mode, while keeping the current cleaning mode unchanged. For example, if the standard is not met after 10 minutes of initial steam cleaning, extend the steam time by 5 minutes.

[0156] Adjusting the operating device refers to changing the combination of purification devices currently in operation. For example, if steam cleaning alone is insufficient, an ultrasonic generator can be automatically activated; or if the deodorization effect is poor, the system can switch from a single activated carbon mode to a combination mode of activated carbon + photocatalytic oxidation device.

[0157] In this embodiment, during the operation of the purification module, it continuously receives status feedback information from the status detection module. If the status feedback information indicates that the cleaning has not met the standards, the working time of the purification module or the operating device is adjusted. This achieves closed-loop control, enabling it to adapt to differences in cleaning effects caused by different water qualities and different stain compositions, thus improving its intelligence and reliability.

[0158] In an exemplary embodiment, the steam oven purification device further includes a temperature detection device connected to the controller, and the steam oven purification control method further includes the step of controlling the purification module to stop working when the temperature of the cooking cavity is greater than a preset temperature threshold.

[0159] The specific details of each of the above steps have been described in the above embodiments and will not be repeated here.

[0160] In an exemplary embodiment, the steam oven purification control method further includes the steps of: acquiring cooking history data; and controlling one or more purification devices in the purification module to operate when the status information or cooking history data meets the preset cleaning trigger conditions.

[0161] Cooking history data refers to data records about the past use of the steam oven stored in the controller's non-volatile memory. Cooking history data may include: cooking mode (steaming, baking, frying), set temperature, duration, actual temperature profile, number of cleaning cycles, etc.

[0162] The preset cleaning trigger conditions are rules that are logically set based on historical data and are used to predict potential cleaning needs.

[0163] After each cooking cycle, the controller automatically adds the key parameters of that cooking session to the historical data record. During the standby period after each cooking cycle, or at fixed time points, the controller checks if the cooking history data meets any preset cleaning trigger conditions. Once the conditions are met, even if the status information indicates the cooking cavity is clean, the system will automatically initiate the cleaning program, controlling one or more purification devices in the purification module to operate.

[0164] For example, if a user uses the steam oven more than 3 times in a row, with the temperature exceeding 150℃ each time, and the oven does not enter the cleaning state within those 3 times, the system will automatically determine it as "high risk of contamination" and start the cleaning program.

[0165] Alternatively, the preset cleaning trigger conditions can also include conditions corresponding to the status information. For example, preset cleaning trigger conditions could include an odor gas concentration greater than a preset gas concentration, or stain information indicating the presence of stains in the cooking cavity. When the status information meets the preset cleaning trigger conditions, the cleaning program is initiated, controlling one or more purification devices in the purification module to operate. The specific process has been explained above and will not be repeated here.

[0166] In this embodiment, cooking history data is acquired; when the status information or cooking history data meets the preset cleaning trigger conditions, one or more purification devices in the purification module are controlled to operate. This allows cleaning to be initiated during periods of high contamination risk, achieving predictive maintenance. Even when the user is unaware or forgets to clean, the system can proactively provide cleaning, improving the intelligence level of the steam oven's purification device.

[0167] In one embodiment, a steam oven is provided, including the steam oven purification device of any of the above embodiments.

[0168] To better understand the above embodiments, a detailed explanation is provided below with reference to a specific embodiment. In one embodiment, the steam oven purification device includes a status detection module, a purification module, a controller, and a temperature detection module. The status detection module includes an odor detection device and a stain detection device, and the purification module includes a stain cleaning device and a photocatalytic oxidation device. The stain detection device is an image acquisition device, which includes an infrared camera. The stain cleaning device includes a steam generator and an ultrasonic generator. The controller is an MCU. The installation positions of each component can be found in Table 1.

[0169] like Figure 8 As shown, after each cooking session, the user can choose whether to enter the cleaning state according to their own wishes; or the system can automatically determine whether cleaning is needed based on historical cooking data (such as the number of consecutive cooking sessions and temperature change curves). For example, if the user uses the steam oven more than 3 times in a row, and the temperature is higher than 150℃ each time, and the cleaning state has not been entered within the 3 sessions, the system will automatically judge it as "high risk of contamination" and start the cleaning program.

[0170] Table 1

[0171]

[0172] The odor detection device continuously monitors the air quality inside the steam oven and transmits the data to the MCU. If the detected odor gas concentration is greater than the preset gas concentration (e.g., VOC>50ppb), the system will automatically trigger the cleaning program.

[0173] Table 2

[0174]

[0175] An infrared camera captures images of the inner wall of the cooking cavity, and image recognition algorithms (such as CNN) are used to analyze and identify the type of stains (such as oil stains, limescale, and food residue).

[0176] When the MCU determines that steam cleaning needs to be initiated based on multiple factors such as stain type, odor, usage records, and user preferences, it controls the steam generator to start working, adjusting the working time according to the stain type to soften grease and food residue. The correspondence between stain type, cleaning method, and recommended time can be found in Table 2.

[0177] During the cleaning process, the photocatalytic oxidation device is activated simultaneously, the UV lamp is turned on, and the catalyst coating is excited under ultraviolet light, decomposing odor molecules (such as formaldehyde and benzene compounds) into harmless substances.

[0178] Once in cleaning mode, this application offers multiple cleaning modes to choose from. The MCU acquires data from the odor detection device and the type of stain identified by the infrared camera, and then selects the appropriate combination of cleaning modes. If the stain is oil, steam cleaning is the preferred option; for stubborn stains, a combination of steam and ultrasonic cleaning is used; if the odor is strong, the photocatalytic oxidation device is activated to remove the odor.

[0179] Furthermore, such as Figure 9 As shown, the steam oven purification device will adjust the cleaning time and intensity in real time based on the status feedback information from the status detection module. If the odor is not completely eliminated, the photocatalytic oxidation time will be extended; if the stains still exist, the steam or ultrasonic running time will be increased; if the device is detected to be overheating, the cleaning will be automatically paused and the user will be prompted to check.

[0180] The above embodiments analyze historical cooking data and combine odor detection and real-time stain monitoring to automatically select the optimal cleaning and deodorizing strategy, thereby achieving efficient, energy-saving, and intelligent steam oven maintenance functions.

[0181] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0182] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, artificial intelligence (AI) processors, etc., and are not limited to these.

[0183] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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 application.

[0184] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A purification device for a steam oven, characterized in that, include: The status detection module is used to collect status information inside the cooking cavity of the steam oven; The purification module includes two or more purification devices for purifying the cooking cavity in different ways during operation; the purification module includes at least a hot air drying device, a stain cleaning device, and a photocatalytic oxidation device. The controller, connected to the status detection module and the purification module, is used to receive and process the status information, and control one or more purification devices in the purification module to work according to the status information and a preset algorithm; when both the stain cleaning device and the photocatalytic oxidation device are working, the end time of the photocatalytic oxidation device is later than the end time of the stain cleaning device. The stain cleaning device includes a steam generator and an ultrasonic generator connected to the controller. The water tank of the steam generator stores solid photocatalyst particles. When the steam generator is working, water vapor carrying a trace amount of the solid photocatalyst particles is sprayed into the cooking cavity. Some of the particles adhere to the various surfaces of the cooking cavity, while others are suspended and fill the cooking cavity. If the state information indicates that there is only slight moisture in the cooking cavity, then the hot air drying device is controlled to work after making a decision based on the state information and the preset algorithm; if the state information indicates that the concentration of odor gas in the cooking cavity is greater than the preset gas concentration, the photocatalytic oxidation device is controlled to work. When the status information indicates that there are stains in the cooking cavity and they are light stains, the steam generator is controlled to operate; when the status information indicates that there are stains in the cooking cavity and they are stubborn stains, the steam generator and the ultrasonic generator are controlled to operate. The ultrasonic generator is disposed in the cooking cavity and is used to transmit vibrations to the medium in the cooking cavity.

2. The steam oven purification device according to claim 1, characterized in that, The status detection module includes an odor detection device and a stain detection device connected to the controller, and the photocatalytic oxidation device is used to reduce odors in the cooking cavity; The odor detection device is used to detect the concentration of odor gases in the cooking cavity, the stain detection device is used to detect stain information in the cooking cavity, and the controller is used to control the stain cleaning device and the photocatalytic oxidation device to work individually or in combination according to the odor gas concentration, the stain information and the preset algorithm.

3. The steam oven purification device according to claim 2, characterized in that, The controller is also used for: When the concentration of the odor gas is greater than the preset gas concentration, and the stain information indicates that there are stains in the cooking cavity, the stain cleaning device is controlled to work, and the photocatalytic oxidation device is controlled to work at the preset maximum power.

4. The steam oven purification device according to claim 3, characterized in that, The controller is also used for: The deodorization power of the photocatalytic oxidation device is adjusted according to the difference between the odor gas concentration and the preset gas concentration.

5. The steam oven purification device according to claim 3, characterized in that, The controller is also used for: Based on the type of stain in the cooking cavity characterized by the stain information, the working time of the stain cleaning device is adjusted.

6. The steam oven purification device according to claim 1, characterized in that, The controller is also used for: During the operation of the purification module, it continuously receives status feedback information from the status detection module; If the cleaning is deemed not to meet the standards based on the status feedback information, the working time or working device of the purification module is adjusted.

7. The steam oven purification device according to claim 1, characterized in that, It also includes a temperature detection device connected to the controller, the temperature detection device being disposed within the cooking cavity, for detecting the temperature of the cooking cavity and sending it to the controller, the controller further being used for: If the temperature of the cooking cavity exceeds a preset temperature threshold, the purification module will stop working.

8. The steam oven purification device according to claim 1, characterized in that, The controller is also used for: Obtain cooking history data; When the status information or the cooking history data meets the preset cleaning trigger conditions, control one or more purification devices in the purification module to operate.

9. A purification control method for a steam oven, characterized in that, Based on the steam oven purification device according to any one of claims 1-8, the method includes: Receive and process status information; the status information is obtained by the status detection module. The system controls one or more purification devices in the purification module to operate based on the status information and a preset algorithm.

10. The method according to claim 9, characterized in that, The method further includes: During the operation of the purification module, it continuously receives status feedback information from the status detection module; If the cleaning is deemed not to meet the standards based on the status feedback information, the working time or working device of the purification module is adjusted.

11. The method according to claim 9, characterized in that, The method further includes: Obtain cooking history data; When the status information or the cooking history data meets the preset cleaning trigger conditions, control one or more purification devices in the purification module to operate.

12. A steam oven, characterized in that, Includes the steam oven purification device as described in any one of claims 1-8.

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