A smart drainage system and drainage method for a steam oven
By using infrared water level and humidity sensors in tandem and combining them with intelligent decision-making from the control module, the steam oven achieves precise drainage, solving the problems of incomplete evaporation and high energy consumption, thus improving the user experience and energy efficiency of the steam oven.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- NINGBO FOTILE KITCHEN WARE CO LTD
- Filing Date
- 2026-01-21
- Publication Date
- 2026-05-26
AI Technical Summary
Existing steam ovens have drainage methods that are difficult to handle complex moisture scenarios, resulting in incomplete evaporation, affecting hygiene performance and long-term reliability, and also incurring high power costs.
It employs infrared water level and humidity sensors for collaborative detection, combined with a control module to accurately determine residual water and residual moisture. Through intelligent decision control of the bottom heating plate and drainage components, it achieves precise heating evaporation and moisture discharge.
This ensures thorough evaporation of moisture, stable and reliable system operation, improved user experience and energy efficiency, reduced energy consumption, and prevention of internal dampness and bacterial growth.
Smart Images
Figure CN122074820A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of intelligent steam oven technology, specifically to an intelligent drainage system and drainage method for a steam oven. Background Technology
[0002] Current steam ovens commonly use a single heating and evaporation method or a simple drainage design, which is insufficient to handle complex moisture retention scenarios. This can easily lead to incomplete evaporation, affecting the oven's hygiene and long-term reliability. Directly heating and evaporating residual water and moisture inside the cavity via a bottom heating plate often results in overheating, wasting energy and significantly increasing electricity costs. Furthermore, it's difficult to ensure complete evaporation, leaving residual moisture or water accumulation inside the cavity. This not only affects the user experience but can also cause problems such as internal dampness and bacterial growth. Summary of the Invention
[0003] To address the problems in existing steam ovens where the drainage heating time cannot be controlled, resulting in excessively long heating times, high electricity costs, and incomplete water evaporation.
[0004] This application provides an intelligent drainage system for a steam oven, including a detection module, a control module, a bottom heating plate, and a drainage component; The detection module includes an infrared water level sensor and a humidity sensor installed inside the steam oven cavity; The control module is electrically connected to the infrared water level sensor, humidity sensor, bottom heating plate, and drainage assembly, respectively, and is used for: After cooking, the residual water level signal output by the infrared water level sensor is used to determine whether there is residual water at the bottom of the cavity or in the evaporation pan. The humidity value of the cavity detected by the humidity sensor, combined with the preset water vapor humidity detection conditions, determines whether there is residual water vapor in the cavity; Based on the determination of the residual water and / or residual water vapor, the bottom heating plate is controlled to heat and evaporate the residual water and / or residual water vapor, and the drainage component is controlled to discharge liquid water until the humidity of the cavity detected by the humidity sensor returns to the preset reference value.
[0005] Furthermore, the infrared water level sensor includes a transmitting unit, a receiving unit, and a signal processing unit; The emitting unit is used to emit infrared light to a prism structure located at the bottom or side of the evaporation plate; The receiving unit is used to receive the light signal reflected / refracted by the prism structure and convert it into an electrical signal; The signal processing unit is used to compare the electrical signal strength with a preset water level determination threshold. When the electrical signal strength received by the receiving unit is higher than the water level determination threshold, it outputs a first level signal; when it is lower than the water level determination threshold, it outputs a second level signal.
[0006] Furthermore, the signal processing unit also integrates an interference filtering element to filter out interference from bubbles or liquid surface fluctuations through time window sampling, and uses an average or median algorithm to stabilize the output result.
[0007] Furthermore, the drainage assembly includes a first solenoid valve, a second solenoid valve, and a flow guide pipe; The inlet end of the first solenoid valve is connected to the inlet pipe, and the outlet end is connected to the evaporation plate. It is used to supply water as needed and control the water volume during cooking. The bottom of the evaporation plate is equipped with a normally closed solenoid valve, which is used to drain the residual water to the guide pipe after cooking.
[0008] Furthermore, the control module includes a first judgment unit, used to determine that there is residual water vapor in the cavity when the humidity value of the cavity is greater than a preset humidity threshold.
[0009] Furthermore, the control module includes a temperature compensation unit, a humidity calculation unit, and a second judgment unit; The temperature compensation unit is used to correct the output error of the humidity sensor based on the cavity temperature value and the cavity humidity value detected by the temperature sensor, through a temperature compensation coefficient and a calibration temperature, to obtain the compensated humidity value. The humidity calculation unit is used to calculate the relative humidity based on the compensated humidity value, and to calculate the absolute humidity and dew point temperature in combination with the cavity temperature value. The second judgment unit is used to determine whether there is residual water vapor in the cavity based on the relative humidity, absolute humidity and dew point temperature.
[0010] Furthermore, the control module includes a pressure correction unit, which is used to perform pressure correction on the absolute humidity based on the atmospheric pressure value when calculating the absolute humidity, so as to obtain the corrected absolute humidity.
[0011] Furthermore, the control module is configured as follows: If residual water is present, the bottom heating plate is activated to heat and evaporate the residual water, and the drainable residual water is preferentially discharged through the guide pipe of the drainage assembly. If residual moisture is present, the bottom heating plate is activated to heat and vaporize the moisture, which is then discharged through the exhaust system of the drainage component until the humidity of the cavity returns to the preset baseline value. If both residual water and residual water vapor are present, the residual water in the evaporation pan should be drained through the drain pipe of the drainage component before the heating and evaporation operation is performed.
[0012] This application also provides an intelligent drainage method for a steam oven, applied to the intelligent drainage system, characterized by comprising the following steps: The residual water level electrical signal inside the steam oven cavity is acquired, and a first-level signal or a second-level signal is output based on the comparison between the electrical signal strength and the water level determination threshold. Determine whether there is residual water at the bottom of the evaporation pan or cavity based on the first or second level signal output. Obtain the humidity value of the cavity; Based on the humidity value of the cavity and in conjunction with preset water vapor humidity detection conditions, it is determined whether there is residual water vapor in the cavity; Based on the determination of residual water and residual water vapor, the bottom heating plate is controlled to heat and evaporate the residual water and / or residual water vapor, and the drainage component is controlled to discharge liquid water until the humidity of the cavity returns to the preset benchmark value.
[0013] Furthermore, the step of controlling the bottom heating plate to heat and evaporate residual water and / or residual water vapor includes: Based on the obtained residual water level detection results, the heating power of the bottom heating plate is dynamically adjusted; The humidity of the cavity is continuously monitored. Heating stops when the humidity value of the cavity returns to the preset reference value. If it does not return, secondary heating or an alarm is triggered.
[0014] Implementing the embodiments of this application has the following beneficial effects: The intelligent drainage system of the steam oven in this embodiment uses a high-precision infrared water level sensor to accurately determine the residual water status in the evaporation pan, combined with a humidity sensor to detect the humidity value of the cavity in real time, to achieve accurate differentiation between residual water and residual water vapor. Based on the detection results, the control module makes intelligent decisions, prioritizing the drainage of the drainable residual water, and then activating the bottom heating plate for precise heating and evaporation in cases of residual water vapor or coexistence, and expelling water vapor through the exhaust system until the cavity humidity returns to the baseline value. Through the closed-loop control of "detection-determination-drainage-evaporation-drying", the system ensures thorough evaporation of water vapor, stable and reliable system operation, supports multi-mode adaptation and complex working conditions, significantly improves the user experience, hygiene performance and energy efficiency of the steam oven, and solves the problems of uncontrollable heating and incomplete evaporation in traditional technologies, which lead to high energy consumption, internal cavity corrosion and poor user experience. Attached Figure Description
[0015] To more clearly illustrate the technical solutions of this application, the accompanying drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.
[0016] Figure 1 This is a structural block diagram of the intelligent drainage system of the steam oven according to an embodiment of this application; Figure 2 This is a schematic diagram of the structure of the intelligent module in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of the infrared water level sensor according to an embodiment of this application; Figure 4 This is a schematic diagram illustrating the configuration of an infrared water level sensor and a humidity sensor in a steam oven according to an embodiment of this application. Figure 5 This is a flowchart of the intelligent drainage method for the steam oven according to an embodiment of this application; Figure 6 This is a hardware structure block diagram of the server for the intelligent drainage method of the steam oven in this embodiment of the application.
[0017] The attached figures are labeled as follows: 1. Infrared water level sensor; 11. Transmitting unit; 12. Receiving unit; 13. Signal processing unit; 2. Humidity sensor; 3. Control module; 300. Residual water determination unit; 310. Water vapor determination unit; 311. First determination unit; 312. Temperature compensation unit; 313. Humidity calculation unit; 314. Second determination unit; 315. Pressure correction unit; 320. Drainage control unit; 4. Bottom heating plate; 5. Drainage assembly; 6. Temperature sensor. Detailed Implementation
[0018] The technical solutions of the embodiments of this application 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 of ordinary skill in the art without creative effort are within the scope of protection of this application.
[0019] For the terms defined below, unless a different definition is given elsewhere in the claims or this specification, these definitions shall apply. All numerical values, whether explicitly indicated or not, are defined herein as being modified by the term "about." The term "about" generally refers to a range of numerical values that a person skilled in the art would consider equivalent to the stated values to produce substantially the same properties, functions, results, etc. A range of numerical values indicated by a low value and a high value is defined as including all numerical values included within that range and all subranges included within that range.
[0020] 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.
[0021] The following combination Figure 1 This application provides an intelligent drainage system and drainage method for a steam oven, as described in an embodiment. Please refer to [link / reference]. Figure 1-6 , Figure 1 This is a structural block diagram of the intelligent drainage system of the steam oven according to an embodiment of this application; Figure 2 This is a schematic diagram of the structure of the intelligent module in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of the infrared water level sensor according to an embodiment of this application; Figure 4 This is a flowchart of the intelligent drainage method for the steam oven according to an embodiment of this application; Figure 5 This is a flowchart of the intelligent drainage method for the steam oven according to an embodiment of this application; Figure 6 This is a hardware structure block diagram of the server for the intelligent drainage method of the steam oven in this embodiment of the application.
[0022] The intelligent drainage system of the steam oven solves the problems of uncontrollable heating time, high energy consumption, and incomplete water evaporation in traditional technologies through multi-sensor collaborative detection and intelligent control strategies. The system includes a detection module, a control module 3, a bottom heating plate 4, and a drainage component 5.
[0023] The detection module includes an infrared water level sensor 1 and a humidity sensor 2 installed inside the oven cavity.
[0024] The infrared water level sensor 1 is located on the top or side wall of the cavity, near the prism structure at the bottom or side of the evaporation pan. The infrared water level sensor 1 includes a transmitting unit 11, a receiving unit 12, and a signal processing unit 13. The transmitting unit 11 is an infrared light emitter used to emit infrared light to the prism structure located at the bottom or side of the evaporation pan; the receiving unit 12 is used to receive the light signal reflected / refracted by the prism structure and convert it into an electrical signal; the signal processing unit 13 has a pre-stored water level judgment threshold, used to compare the intensity of the received electrical signal with the preset water level judgment threshold, outputting a first-level signal when the intensity of the received electrical signal is higher than the water level judgment threshold, and outputting a second-level signal when the intensity is lower than the water level judgment threshold.
[0025] It should be noted that the water level determination threshold is a critical electrical signal intensity value pre-stored in the signal processing unit 13 to distinguish whether there is water in the evaporation pan. It is calibrated based on the working principle of the infrared water level sensor 1, the propagation characteristics of light signals in different states in the evaporation pan with or without water, and a large amount of experimental data.
[0026] During the operation of the infrared water level sensor 1, when the infrared light emitted by the transmitting unit 11 is projected onto the prism structure at the bottom or side of the evaporation pan, the propagation path of the light will change to varying degrees due to the significant difference in refractive index between the prism structure and water or air. When there is no water in the evaporation pan, the infrared light is reflected at the interface between the prism structure and air, and most of the light can be directly reflected back to the receiving unit 12. At this time, the light signal received by the receiving unit 12 is relatively strong, and the converted electrical signal strength is also relatively high. When the electrical signal strength received by the receiving unit 12 is higher than the water level determination threshold, the signal processing unit 13 outputs a first-level signal. The first-level signal represents the state of no water in the evaporation pan and is usually defined as a high-level signal. When there is water in the evaporation pan, the infrared light is refracted at the interface between the prism structure and water, and most of the light will be refracted into the water. The light signal received by the receiving unit 12 is relatively weak, and the converted electrical signal strength is relatively low. When the electrical signal strength received by the receiving unit 12 is lower than the water level determination threshold, the signal processing unit 13 outputs a second-level signal. The second-level signal represents the state of water in the evaporation pan and is usually defined as a low-level signal.
[0027] In some possible implementations, the signal processing unit 13 also integrates an interference filtering element to filter out interference from bubbles or liquid surface fluctuations by sampling through a time window, and to stabilize the output results using an average or median algorithm.
[0028] The infrared water level sensor 1 boasts high detection accuracy, reaching ±1mm, far exceeding the ±3mm error of traditional float-type sensors; it is unaffected by liquid color, temperature, viscosity, and air bubbles. It has no mechanical parts, ensuring high reliability; it supports multi-angle installation, offering high installation flexibility; and it supports multi-point water level detection, enabling segmented liquid level monitoring.
[0029] Humidity sensor 2 can be a capacitive humidity sensor or a resistive humidity sensor. Humidity sensor 2 is installed on the top inner wall or side wall of the steam oven cavity to detect the humidity value of the cavity in real time.
[0030] The control module 3 is electrically connected to the infrared water level sensor 1, the humidity sensor 2, the bottom heating plate 4, and the drainage assembly 5. The control module 3 includes a residual water detection unit 300, a water vapor detection unit 310, and a drainage control unit 320.
[0031] The residual water detection unit 300 is used to determine whether there is residual water at the bottom of the cavity or in the evaporator plate after cooking, based on the residual water level electrical signal output by the infrared water level sensor 1. When a first-level signal is received, it is determined that there is no water in the evaporator plate. When a second-level signal is received, it is determined that there is water in the evaporator plate; this is typically defined as a low-level signal.
[0032] The moisture determination unit 310 is used to determine whether there is residual moisture in the cavity by combining the humidity value detected by the humidity sensor 2 with the preset moisture humidity detection conditions.
[0033] The drainage control unit 320 is used to control the bottom heating plate 4 to heat and evaporate the residual water and / or residual water vapor based on the determination result of residual water and / or residual water vapor, and to control the drainage assembly 5 to discharge liquid water until the humidity of the cavity detected by the humidity sensor 2 returns to the preset reference value.
[0034] The intelligent drainage system of the steam oven in this embodiment uses the coordinated detection of an infrared water level sensor and a humidity sensor to accurately determine the residual water at the bottom of the cavity and the residual water vapor inside the cavity in real time. Based on the detection results, the system achieves low-energy drainage by draining liquid water through the control module and dynamically adjusting the evaporation strategy, avoiding energy waste and water vapor residue caused by overheating or underheating. Through the closed-loop control of "detection-judgment-draining-evaporation-drying", the system ensures thorough water vapor evaporation and stable and reliable system operation, thereby improving the user experience, hygiene performance and energy efficiency of the steam oven.
[0035] Furthermore, the drainage assembly 5 includes a first solenoid valve, a second solenoid valve, and a flow guide pipe.
[0036] The inlet end of the first solenoid valve is connected to the inlet pipe, and the outlet end is connected to the evaporation plate. It is used to supply water as needed and control the water volume during cooking. The bottom of the evaporation plate is equipped with a normally closed solenoid valve, which is used to drain the residual water to the guide pipe after cooking.
[0037] In one possible implementation, the first solenoid valve can be a normally open solenoid valve, installed on the water inlet pipe outside the steam oven. Its inlet end is connected to an external water source, and its outlet end is connected to the water inlet on the top or side of the evaporation tray. In cooking mode, the opening of the first solenoid valve is controlled by the control module 3 to adjust the water flow as needed, ensuring that only the necessary basic water volume is retained in the evaporation tray. The second solenoid valve can be a normally closed solenoid valve located at the drain outlet at the bottom of the evaporation tray, and is connected to a guide pipe. The second solenoid valve is fully opened only when the control module 3 sends an opening signal after cooking is complete, to quickly drain any residual liquid water from the evaporation tray.
[0038] In one possible implementation, the drainage assembly 5 further includes an exhaust assembly, which includes an exhaust fan and an exhaust pipe communicating with the cavity. After cooking, if residual moisture is detected in the cavity, the exhaust assembly can be activated by the control module 3 to vent the residual moisture. The exhaust assembly can also cooperate with the bottom heating plate 4 to vent moisture from the cavity, thereby increasing the exhaust efficiency.
[0039] In one possible implementation, the moisture determination unit 310 includes a first determination unit 311, which is used to determine that there is residual moisture in the cavity when the humidity value of the cavity is greater than a preset humidity threshold.
[0040] The preset humidity threshold is a fixed value stored in the moisture determination unit 310. It represents a critical value at which residual moisture is considered to exist when the relative humidity inside the cavity reaches this value under normal use of the steam oven.
[0041] The first judgment unit 311 compares the received real-time cavity humidity value with a preset humidity threshold. When the real-time cavity humidity value is greater than the preset humidity threshold, the first judgment unit 311 determines that residual water vapor exists in the cavity. Conversely, when the real-time cavity humidity value is less than or equal to the preset humidity threshold, the first judgment unit 311 determines that no residual water vapor exists in the cavity. The first judgment unit 311 can output the judgment result to the drainage control unit 320 in the form of an electrical signal or a digital signal. Based on the judgment result, the drainage control unit 320 decides whether to initiate subsequent heating evaporation and drainage operations. If residual water vapor is determined to exist, the drainage control unit 320 will further combine the determination of residual water to comprehensively formulate drainage and evaporation strategies.
[0042] In another possible implementation, the water vapor determination unit 310 includes a temperature compensation unit 312, a humidity calculation unit 313, and a second determination unit 314.
[0043] The temperature compensation unit 312 is used to obtain the compensated humidity value by correcting the output error of the humidity sensor 2 through the temperature compensation coefficient and the calibration temperature based on the cavity temperature value and cavity humidity value detected by the temperature sensor 6.
[0044] Correcting the humidity sensor's error caused by ambient temperature:
[0045] in, This is the cavity temperature value. This is the real-time measured humidity value of the cavity. This is the temperature compensation coefficient. To calibrate the temperature, This is the compensated humidity value.
[0046] The humidity calculation unit 313 is used to calculate the relative humidity based on the compensated humidity value, and to calculate the absolute humidity and dew point temperature in combination with the cavity temperature value.
[0047] Calculate relative humidity by referring to a table or using a linear fitting formula based on capacitance / resistance values and a standard curve:
[0048] , This refers to the sensor calibration coefficient. RH stands for relative humidity, measured in grams per cubic meter (g / m³).
[0049] Calculate the absolute humidity by combining the cavity temperature and relative humidity:
[0050] Where AH represents absolute humidity, measured in grams per cubic meter (g / m³). 6.112 is a constant used to calculate saturated vapor pressure. e is the base of the natural logarithm. 17.67 is an empirical constant used to calculate saturated vapor pressure, and its relationship to temperature is relevant. 243.5 is an empirical constant derived from the meteorological formula for saturated vapor pressure, used to calculate the saturated vapor pressure of water at different temperatures. 273.15 is a constant used to convert Celsius to Kelvin (K).
[0051] Calculation of dew point temperature:
[0052] in, This refers to the dew point temperature. In practical applications, the dew point temperature can also be measured directly through a physical process using a cold mirror sensor.
[0053] The second judgment unit 314 is used to determine whether there is residual water vapor in the cavity based on relative humidity, absolute humidity and dew point temperature.
[0054] Furthermore, the water vapor determination unit 310 also includes a pressure correction unit 315, which is used to further correct the absolute humidity based on the atmospheric pressure value when calculating the absolute humidity, to obtain the corrected absolute humidity. This corrects the absolute humidity under the current conditions to the absolute humidity under standard atmospheric pressure conditions. By multiplying by the pressure ratio, the absolute humidity value can be adjusted to make it comparable under standard atmospheric pressure.
[0055] Pressure correction formula:
[0056] Corrected absolute humidity. AH represents the absolute humidity under current conditions. The pressure is standard atmosphere, which is 1013.25 hPa. P is the current air pressure.
[0057] In some implementations, after the above-described temperature compensation, calculation, and pressure correction, humidity data similar to the following can be output.
[0058] Humidity data = {RH%: 45.2 ± 0.5%, AH: 12.3 g / L} Td: 7.5℃ Furthermore, the control module 3 also includes a calibration and optimization unit. Through static calibration, the sensor output value is recorded and a linear equation is fitted in a constant temperature and humidity chamber using a standard humidity generator as a reference. Then, dynamic calibration is used in combination with wet-bulb and dry-bulb data (ventilated type) for cross-validation to correct nonlinear errors.
[0059] Employing condensation-based moisture humidity detection technology, this method directly calculates absolute humidity by cooling the gas to its dew point temperature and based on thermodynamic principles, achieving high-precision, low-error detection of residual moisture in the oven cavity. Its direct measurement logic based on saturated vapor pressure avoids traditional errors caused by sensor aging or environmental interference, significantly improving the accuracy and reliability of residual moisture determination. It also solves the detection deviation problem caused by temperature drift and chemical corrosion in traditional capacitive / resistive humidity sensors, providing technical support for intelligent drainage systems to accurately determine the residual moisture state and optimize evaporation control strategies.
[0060] Furthermore, the control module 3 includes a self-test module, which verifies whether the humidity value of the cavity has recovered to the preset reference value through the humidity sensor 2. If it has not recovered, it triggers a secondary heating process or an alarm.
[0061] Furthermore, control module 3 is configured as follows: If residual water remains, the bottom heating plate 4 is activated to heat and evaporate the residual water, and the drainable residual water is preferentially discharged through the guide pipe of the drainage assembly 5. The control module 3 can preferentially activate the normally closed solenoid valve in the drainage assembly 5 to open, allowing the residual water to be directly discharged by gravity into the guide pipe and discharged to the outside. If the evaporation plate structure has a dent or the guide pipe cannot completely drain the water, the bottom heating plate 4 is activated simultaneously to provide auxiliary heating and evaporation for the small amount of residual water remaining.
[0062] If residual moisture is present, the bottom heating plate 4 is activated to heat and vaporize the moisture, which is then discharged through the exhaust system of the drainage component 5 until the cavity humidity returns to the preset baseline value. If the cavity humidity value detected by the humidity sensor 2 exceeds the preset humidity threshold, or if the absolute humidity / dew point temperature calculated by the condensation method is abnormal, it is determined that residual moisture exists in the cavity; at the same time, the infrared water level sensor 1 outputs a first-level signal to confirm that there is no residual water in the evaporation plate. The control module 3 can directly activate the bottom heating plate 4 to further vaporize the residual moisture in the cavity through constant temperature heating, while simultaneously opening the exhaust system to force the vaporized water vapor out of the cavity. During the heating process, the humidity sensor 2 monitors the cavity humidity value in real time. When the humidity returns to the preset baseline value, the control module 3 stops the power supply to the heating plate and shuts off the exhaust system; if the humidity does not recover within the preset time, it can be determined that the evaporation efficiency is insufficient, and secondary heating is triggered to increase heating or an alarm is issued.
[0063] If both residual water and residual water vapor are present, the residual water in the evaporation pan is first drained through the guide pipe of the drainage component 5 before the heating and evaporation operation is performed. The infrared water level sensor 1 outputs a second-level signal. If there is residual water in the evaporation pan and the humidity value detected by the humidity sensor 2 exceeds a preset threshold, or if the comprehensive algorithm determines that both require processing, the control module 3 can prioritize the drainage of residual water, quickly draining the divertable residual water in the evaporation pan through the drainage component 5. If a small amount of non-drainable residual water remains in the evaporation pan, the bottom heating plate 4 is simultaneously activated to assist evaporation. In some embodiments, after the residual water is drained, the heating and evaporation operation can be performed on the residual water vapor: the temperature of the bottom heating plate 4 is increased and discharged through the exhaust system. Throughout the process, the humidity sensor 2 provides real-time feedback on the humidity value of the cavity. Heating and exhaust are stopped when the humidity returns to a preset baseline value; if it does not return, secondary processing or an alarm is triggered. By employing a tiered strategy of "first draining residual water, then removing residual water vapor," residual water is prevented from hindering water vapor evaporation. For example, liquid water covering the surface of the evaporation plate reduces heating efficiency, while also reducing overall heating energy consumption and ensuring that the cavity environment is thoroughly dry.
[0064] The intelligent drainage system of the steam oven in this embodiment uses a high-precision infrared water level sensor to accurately determine the residual water status in the evaporation pan, combined with a humidity sensor to detect the humidity value of the cavity in real time, to achieve accurate differentiation between residual water and residual water vapor. Based on the detection results, the control module makes intelligent decisions, prioritizing the drainage of the drainable residual water, and then activating the bottom heating plate for precise heating and evaporation in cases of residual water vapor or coexistence, and expelling water vapor through the exhaust system until the cavity humidity returns to the baseline value. Through the closed-loop control of "detection-determination-drainage-evaporation-drying", the system ensures thorough evaporation of water vapor, stable and reliable system operation, supports multi-mode adaptation and complex working conditions, significantly improves the user experience, hygiene performance and energy efficiency of the steam oven, and solves the problems of uncontrollable heating and incomplete evaporation in traditional technologies, which lead to high energy consumption, internal cavity corrosion and poor user experience.
[0065] This application also provides an intelligent drainage method for a steam oven, applied to an intelligent drainage system, comprising the following steps: S100: Acquire the electrical signal of the residual water level in the oven cavity, and output a first level signal or a second level signal based on the comparison between the electrical signal strength and the water level determination threshold. S200 determines whether there is residual water at the bottom of the evaporation pan or cavity based on the output first level signal or second level signal; S300, obtain the humidity value of the cavity; S400, based on the humidity value of the cavity and combined with the preset water vapor humidity detection conditions, determine whether there is residual water vapor in the cavity; S500, based on the determination results of residual water and residual water vapor, controls the bottom heating plate to heat and evaporate the residual water and / or residual water vapor, and controls the drainage component to discharge liquid water until the humidity of the cavity returns to the preset reference value.
[0066] Furthermore, the step of controlling the bottom heating plate to heat and evaporate residual water and / or residual water vapor includes: Based on the obtained residual water level detection results, the heating power of the bottom heating plate is dynamically adjusted; the humidity of the cavity is continuously monitored, and heating is stopped when the humidity value of the cavity returns to the preset benchmark value. If it does not return, secondary heating or an alarm is triggered.
[0067] This application embodiment also provides an intelligent steam oven, including the above-described intelligent drainage system for steam ovens; it includes a processor and a memory, wherein the memory stores at least one instruction, at least one program, code set, or instruction set, and the at least one instruction, the at least one program, the code set, or instruction set is loaded and executed by the processor to implement the intelligent drainage method of the steam oven.
[0068] Memory is used to store software programs and modules. The processor executes these stored software programs and modules to perform various functional applications and data processing. Memory can primarily consist of a program storage area and a data storage area. The program storage area stores the operating system, application programs required for functionality, etc.; the data storage area stores data created based on device usage, etc. Furthermore, memory can include high-speed random access memory (RAM) and non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device. Accordingly, memory can also include a memory controller to provide the processor with access to the memory.
[0069] The methods and embodiments provided in this application can be executed on mobile terminals, computer terminals, servers, or similar computing devices. Taking running on a server as an example, Figure 6 This is a hardware structure block diagram of a server for an intelligent drainage method for a steam oven provided in an embodiment of this application. For example... Figure 6 As shown, the server 100 can vary significantly due to different configurations or performance. It may include one or more Central Processing Units (CPUs) 110 (CPUs 110 may include, but are not limited to, microprocessors such as MCUs or programmable logic devices such as FPGAs), a memory 130 for storing data, and one or more storage media 120 (e.g., one or more mass storage devices) for storing application programs 123 or data 122. The memory 130 and storage media 120 may be temporary or persistent storage. The program stored in the storage media 120 may include one or more modules, each module may include a series of instruction operations on the server. Furthermore, the CPU 110 may be configured to communicate with the storage media 120 and execute the series of instruction operations stored in the storage media 120 on the server 100. Server 100 may also include one or more power supplies 160, one or more wired or wireless network interfaces 150, one or more input / output interfaces 140, and / or one or more operating systems 121, such as Windows Server™, Mac OS X™, Unix™, Linux™, FreeBSD™, etc.
[0070] The input / output interface 140 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 100. In one example, the input / output interface 140 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, the input / output interface 140 may be a radio frequency (RF) module used for wireless communication with the Internet.
[0071] 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 100 may also include components that are more... Figure 6 The more or fewer components shown, or having the same Figure 6 The different configurations shown.
[0072] This application embodiment also provides a storage medium storing at least one instruction or at least one program, wherein the at least one instruction or the at least one program is loaded and executed by a processor to implement the intelligent drainage method of the steam oven.
[0073] Optionally, in this embodiment, the storage medium may be located at at least one of the multiple network servers in a computer network. Optionally, in this embodiment, the storage medium may include, but is not limited to, various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.
[0074] This application also provides a computer program product or computer program including 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 methods provided in the various optional implementations described above.
[0075] Obviously, the embodiments described above are merely some of the embodiments in this specification, and not all of them. Based on the embodiments in this specification, those skilled in the art can make other variations or modifications without creative effort, and all such variations should fall within the scope of protection of the embodiments in this specification.
Claims
1. An intelligent drainage system for a steam oven, characterized in that, It includes a detection module, a control module (3), a bottom heating plate (4), and a drainage assembly (5); The detection module includes an infrared water level sensor (1) and a humidity sensor (2) installed inside the oven cavity. The control module (3) is electrically connected to the infrared water level sensor (1), humidity sensor (2), bottom heating plate (4), and drainage assembly (5) respectively, and is used for: After cooking, the residual water level signal output by the infrared water level sensor (1) is used to determine whether there is residual water at the bottom of the cavity or in the evaporation pan. The humidity value of the cavity detected by the humidity sensor (2) is combined with the preset water vapor humidity detection conditions to determine whether there is residual water vapor in the cavity; Based on the determination of the residual water and / or residual water vapor, the bottom heating plate (4) is controlled to heat and evaporate the residual water and / or residual water vapor, and the drainage component (5) is controlled to discharge liquid water until the humidity of the cavity detected by the humidity sensor (2) returns to the preset reference value.
2. The intelligent drainage system of the steam oven according to claim 1, characterized in that, The infrared water level sensor (1) includes a transmitting unit (11), a receiving unit (12), and a signal processing unit (13). The emitting unit (11) is used to emit infrared light to a prism structure located at the bottom or side of the evaporation plate; The receiving unit (12) is used to receive the light signal reflected / refracted by the prism structure and convert it into an electrical signal; The signal processing unit (13) is used to compare the electrical signal strength with the preset water level determination threshold. When the electrical signal strength received by the receiving unit (12) is higher than the water level determination threshold, it outputs a first level signal and when it is lower than the water level determination threshold, it outputs a second level signal.
3. The intelligent drainage system of the steam oven according to claim 2, characterized in that, The signal processing unit (13) also integrates an interference filtering element, which is used to filter out interference from bubbles or liquid surface fluctuations through time window sampling, and to output stable results using average or median algorithms.
4. The intelligent drainage system of the steam oven according to claim 1, characterized in that, The drainage assembly (5) includes a first solenoid valve, a second solenoid valve, and a flow guide pipe; The inlet end of the first solenoid valve is connected to the inlet pipe, and the outlet end is connected to the evaporation plate. It is used to supply water as needed and control the water volume during cooking. The bottom of the evaporation plate is equipped with a normally closed solenoid valve, which is used to drain the residual water to the guide pipe after cooking.
5. The intelligent drainage system of the steam oven according to claim 1, characterized in that, The control module (3) includes a first judgment unit (311) for judging that there is residual water vapor in the cavity when the humidity value of the cavity is greater than a preset humidity threshold.
6. The intelligent drainage system of the steam oven according to claim 1, characterized in that, The control module (3) includes a temperature compensation unit (312), a humidity calculation unit (313), and a second judgment unit (314). The temperature compensation unit (312) is used to correct the output error of the humidity sensor (2) based on the cavity temperature value detected by the temperature sensor and the cavity humidity value, and to obtain the compensated humidity value. The humidity calculation unit (313) is used to calculate the relative humidity based on the compensated humidity value, and to calculate the absolute humidity and dew point temperature in combination with the cavity temperature value. The second judgment unit (314) is used to determine whether there is residual water vapor in the cavity based on the relative humidity, absolute humidity and dew point temperature.
7. The intelligent drainage system of the steam oven according to claim 6, characterized in that, The control module (3) includes a pressure correction unit (315) for further pressure correction of the absolute humidity based on the atmospheric pressure value when calculating the absolute humidity, so as to obtain the corrected absolute humidity.
8. The intelligent drainage system of the steam oven according to any one of claims 1-7, characterized in that, The control module (3) is configured as follows: If there is residual water, the bottom heating plate (4) is activated to heat and evaporate the residual water, and the drainable residual water is preferentially discharged through the guide pipe of the drainage component (5); If residual moisture exists, the bottom heating plate (4) is activated to heat and vaporize the moisture and discharge it through the exhaust system of the drainage component (5) until the humidity of the cavity returns to the preset reference value; If residual water and residual water vapor are present at the same time, the residual water in the evaporation pan is first drained through the guide pipe of the drainage component (5) before the heating and evaporation operation is performed.
9. A smart drainage method for a steam oven, applied to the smart drainage system described in any one of claims 1-8, characterized in that, Includes the following steps: The residual water level electrical signal inside the steam oven cavity is acquired, and a first-level signal or a second-level signal is output based on the comparison between the electrical signal strength and the water level determination threshold. Determine whether there is residual water at the bottom of the evaporation pan or cavity based on the first or second level signal output. Obtain the humidity value of the cavity; Based on the humidity value of the cavity and in conjunction with preset water vapor humidity detection conditions, it is determined whether there is residual water vapor in the cavity; Based on the determination of residual water and residual water vapor, the bottom heating plate is controlled to heat and evaporate the residual water and / or residual water vapor, and the drainage component is controlled to discharge liquid water until the humidity of the cavity returns to the preset benchmark value.
10. The intelligent drainage method for a steam oven according to claim 9, characterized in that, The step of controlling the bottom heating plate to heat and evaporate residual water and / or residual water vapor includes: Based on the obtained residual water level detection results, the heating power of the bottom heating plate is dynamically adjusted; The humidity of the cavity is continuously monitored. Heating stops when the humidity value of the cavity returns to the preset reference value. If it does not return, secondary heating or an alarm is triggered.