Humidity control method of steam oven and steam oven

Abstract

This application belongs to the field of smart home appliance technology, specifically relating to a humidity control method for a steam oven and the steam oven itself. The method determines the target humidity of the oven cavity based on the target temperature corresponding to the currently activated function. A first humidification duration is determined based on the target humidity, and the steam generator of the steam oven is controlled to heat the cavity to humidify it. Once the temperature of the steam generator reaches the first temperature, a timer is started until the first humidification duration is reached. After the first humidification duration is reached, the humidity of the cavity is controlled using a proportional-integral-derivative (PID) control method based on the difference between the current humidity and the target humidity. During the humidity control process, if the current humidity is greater than the target humidity, and the difference between the current humidity and the target humidity is greater than a first preset threshold, the air inlet valve of the steam oven is opened to allow dry, cool air to enter the cavity. This method effectively improves the accuracy of humidity control.

Description

Technical Field

[0001] This application belongs to the field of smart home appliance technology, specifically relating to a humidity control method for a steam oven and the steam oven itself. Background Technology

[0002] Steam ovens integrate multiple cooking functions such as steaming, baking, and steam roasting, and can meet various cooking needs such as Chinese steamed dishes, Western baking, air frying, and high-temperature sterilization. They are suitable for various scenarios such as home and commercial use, and their application in the field of kitchen appliances is becoming increasingly widespread.

[0003] Currently, the humidity control method for steam ovens typically determines the target temperature based on the user-selected operating mode, or the target humidity based on a manually set target temperature. Then, a humidity sensor detects the actual humidity level inside the steam oven cavity. When the detected actual humidity is lower than the target humidity, the steam generator is controlled to heat the cavity, allowing steam to enter and increase the humidity. When the actual humidity is higher than the target humidity, dry, cool air is introduced or the exhaust system is activated to reduce the humidity inside the steam oven cavity.

[0004] However, this method of humidity control in steam ovens only controls the humidity of the oven cavity based on the target humidity, which is prone to large humidity control errors and has low control accuracy. Summary of the Invention

[0005] This application provides a humidity control method for a steam oven and a steam oven, which solves the problem that existing steam ovens control the humidity of the cavity based solely on the target humidity, resulting in large humidity control errors and low control accuracy.

[0006] In a first aspect, embodiments of this application provide a humidity control method for a steam oven, comprising:

[0007] The target humidity of the cavity is determined based on the target temperature of the cavity of the steam oven corresponding to the currently activated function;

[0008] The first humidification duration is determined based on the target humidity, and the steam generator of the steam oven is controlled to heat up to humidify the cavity. When the temperature of the steam generator reaches the first temperature, the timer is started until the timer duration reaches the first humidification duration.

[0009] After the timing period reaches the first humidification period, the humidity of the cavity is controlled by a proportional-integral-derivative (PID) control method based on the difference between the current humidity and the target humidity. During the process of controlling the humidity of the cavity by the PID control method, if the current humidity is greater than the target humidity and the difference between the current humidity and the target humidity is greater than a first preset threshold, the air intake valve of the steam oven is opened to allow dry and cold air to enter the cavity.

[0010] Optionally, determining the target humidity of the cavity based on the target temperature of the oven cavity corresponding to the currently activated function includes:

[0011] Determine whether to activate humidification based on the currently activated function;

[0012] When humidification is activated, the target humidity of the cavity is determined based on the target temperature of the oven cavity.

[0013] Optionally, before determining the target humidity of the cavity based on the target temperature of the oven cavity, the method further includes:

[0014] Turn on the cooling fan of the steam oven and start preheating;

[0015] In response to preheating completion or user command, the current dew point temperature of the cavity is collected;

[0016] The step of controlling the humidity of the oven cavity using a proportional-integral-derivative control method based on the difference between the current humidity and the target humidity includes:

[0017] If the dew point temperature of the cavity is lower than the alarm temperature, the humidity of the cavity of the steam oven is controlled by a proportional-integral-derivative control method based on the difference between the current humidity and the target humidity.

[0018] Optionally, the method further includes:

[0019] If the dew point temperature of the cavity is greater than or equal to the alarm temperature, then the humidification interval and the second humidification duration are determined according to the target humidity, and the steam generator is controlled to operate for the second humidification duration according to the humidification interval.

[0020] Optionally, before determining the target humidity of the cavity based on the target temperature of the oven cavity, the method further includes:

[0021] The amount of water entering the steam generator is controlled to reach a second preset threshold.

[0022] Optionally, the method further includes:

[0023] When the temperature of the steam generator reaches the first temperature, the water entering the steam generator is controlled for a first preset time.

[0024] During the operation of the steam generator, when the steam generator operates for a second preset duration, the water intake of the steam generator is controlled for a first preset duration.

[0025] Optionally, before controlling the air intake valve of the steam oven to open to allow dry, cold air to enter the cavity, the method further includes:

[0026] Control the steam generator to stop heating, and control the exhaust port of the steam oven to open;

[0027] After the air intake valve of the steam oven is opened to allow dry, cold air to enter the cavity, the method further includes:

[0028] If the difference between the current humidity and the target humidity is less than or equal to the preset threshold, then the exhaust port is controlled to close, and the intake valve is controlled to close.

[0029] Secondly, embodiments of this application provide a steam oven, including: a main body, an air inlet valve, and a controller;

[0030] The intake valve includes a solenoid valve and an intake piston. When the solenoid valve is energized, the intake piston opens to allow dry, cold air to enter the main body; when the solenoid valve is de-energized, the intake piston closes.

[0031] The controller is used to perform any of the methods described above.

[0032] Thirdly, embodiments of this application provide a humidity control device for a steam oven, comprising:

[0033] The determination module is used to determine the target humidity of the cavity based on the target temperature of the cavity of the steam oven corresponding to the currently activated function;

[0034] The determining module is further configured to determine a first humidification duration based on the target humidity, and control the steam generator of the steam oven to heat up to humidify the cavity. When the temperature of the steam generator reaches a first temperature, the timing is started until the timing duration reaches the first humidification duration.

[0035] The control module is used to control the humidity of the cavity using a proportional-integral-derivative (PID) control method after the timing duration reaches the first humidification duration, based on the difference between the current humidity and the target humidity of the cavity. During the process of controlling the humidity of the cavity using the PID control method, if the current humidity is greater than the target humidity and the difference between the current humidity and the target humidity is greater than a first preset threshold, then the control module controls the air intake valve of the steam oven to open so that dry and cold air enters the cavity.

[0036] Optionally, the determining module is further configured to determine whether to start humidification based on the currently activated function;

[0037] The determining module is further configured to determine the target humidity of the cavity based on the target temperature of the cavity of the steam oven when humidification is determined to be started.

[0038] The device further includes: a startup module;

[0039] The startup module is used to determine whether to start humidification based on the currently activated function;

[0040] The determining module is further configured to determine the target humidity based on the target temperature when humidification is determined to be started.

[0041] The device further includes: a data acquisition module;

[0042] The start-up module is also used to start the cooling fan of the steam oven and to start preheating;

[0043] The acquisition module is used to acquire the current dew point temperature of the cavity in response to preheating completion or user command;

[0044] The control module is also used to control the humidity of the oven cavity using a proportional-integral-derivative control method based on the difference between the current humidity and the target humidity if the dew point temperature of the cavity is less than the alarm temperature.

[0045] Optionally, the control module is further configured to determine a humidification interval and a second humidification duration based on the target humidity if the dew point temperature of the cavity is greater than or equal to the alarm temperature, and control the steam generator to operate for the second humidification duration according to the humidification interval.

[0046] Optionally, the control module is also used to control the amount of water entering the steam generator to reach a second preset threshold.

[0047] Optionally, the control module is further configured to control the steam generator to receive water for a first preset duration when the steam generator temperature reaches a first temperature.

[0048] The control module is also used to control the steam generator to enter water for a first preset time when the steam generator operates for a second preset time.

[0049] Optionally, the control module is also used to control the steam generator to stop heating and to control the exhaust port of the steam oven to open;

[0050] The control module is further configured to control the exhaust port to close and the intake valve to close if the difference between the current humidity and the target humidity is less than or equal to the preset threshold.

[0051] Fourthly, embodiments of this application provide a humidity control device for a steam oven, comprising:

[0052] Memory;

[0053] processor;

[0054] The memory stores computer-executed instructions;

[0055] The processor executes computer execution instructions stored in the memory to implement the humidity control method for the steam oven as described in the first aspect and various possible implementations of the first aspect above.

[0056] Fifthly, embodiments of this application provide a computer storage medium storing computer execution instructions, which, when executed by a processor, are used to implement the humidity control method for a steam oven as described in the first aspect and various possible implementations thereof.

[0057] In a sixth aspect, embodiments of this application provide a computer program product, the computer program product including a computer program, which, when executed by a processor, implements the humidity control method for a steam oven as described in the first aspect and various possible implementations of the first aspect above.

[0058] The humidity control method and steam oven provided in this application determine the target humidity of the cavity based on the target temperature of the cavity corresponding to the currently activated function; determine the first humidification duration based on the target humidity, and control the steam generator of the steam oven to heat and humidify the cavity; when the temperature of the steam generator reaches the first temperature, start timing until the timing duration reaches the first humidification duration; after the timing duration reaches the first humidification duration, control the humidity of the cavity using a proportional-integral-derivative (PID) control method based on the difference between the current humidity and the target humidity; during the process of controlling the humidity of the cavity using the PID control method, if the current humidity is greater than the target humidity and the difference between the current humidity and the target humidity is greater than a first preset threshold, then control the air inlet valve of the steam oven to open so that dry and cold air enters the cavity. This method first determines the target humidity based on the target temperature. After the steam generator reaches the set temperature, it completes the initial humidification for the first humidification duration, allowing the humidity inside the steam oven to quickly approach the target value. Then, it combines proportional-integral-derivative control to achieve precise humidity control. When the current humidity is detected to be too high and deviates significantly, it introduces dry and cold air by opening the air intake valve to reduce the humidity. This method can accurately maintain the required humidity environment at different cooking temperatures, improving the stability of humidity control and thus improving cooking results and user experience. Attached Figure Description

[0059] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0060] Figure 1 The flow chart of the humidity control method for the steam oven provided in the embodiments of this application Figure 1 ;

[0061] Figure 2 The flow chart of the humidity control method for the steam oven provided in the embodiments of this application Figure 2 ;

[0062] Figure 3 This is a schematic diagram of the intake valve provided in an embodiment of this application;

[0063] Figure 4 This is a schematic diagram of the humidity control device for a steam oven provided in an embodiment of this application.

[0064] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0065] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions 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, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0066] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this invention 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 embodiments of the invention described herein can be implemented, for example, in orders other than those illustrated or described herein.

[0067] In this application, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0068] Steam ovens integrate multiple cooking functions such as steaming, baking, and steam roasting, and can meet various cooking needs such as Chinese steamed dishes, Western baking, air frying, and high-temperature sterilization. They are suitable for various scenarios such as home and commercial use, and their application in the field of kitchen appliances is becoming increasingly widespread.

[0069] Currently, the humidity control method for steam ovens typically determines the target temperature based on the user-selected operating mode, or the target humidity based on a manually set target temperature. Then, a humidity sensor detects the actual humidity level inside the steam oven cavity. When the detected actual humidity is lower than the target humidity, the steam generator is controlled to heat the cavity, allowing steam to enter and increase the humidity. When the actual humidity is higher than the target humidity, dry, cool air is introduced or the exhaust system is activated to reduce the humidity inside the steam oven cavity.

[0070] However, this method of humidity control in steam ovens only controls the humidity of the oven cavity based on the target humidity, which is prone to large humidity control errors and has low control accuracy.

[0071] To address the aforementioned issues, the present application provides a humidity control method and a steam oven. Based on the target temperature of the oven cavity corresponding to the currently activated function, a target humidity of the cavity is determined. A first humidification duration is determined based on the target humidity, and the steam generator of the steam oven is controlled to heat the cavity. Once the temperature of the steam generator reaches the first temperature, a timer is started until the timer reaches the first humidification duration. After the timer reaches the first humidification duration, the humidity of the cavity is controlled using a proportional-integral-derivative (PID) control method based on the difference between the current humidity and the target humidity. During the process of controlling the humidity using the PID control method, if the current humidity is greater than the target humidity, and the difference between the current humidity and the target humidity is greater than a first preset threshold, the air inlet valve of the steam oven is opened to allow dry, cold air to enter the cavity. This method first determines the target humidity based on the target temperature. After the steam generator reaches the set temperature, it completes the initial humidification for the first humidification duration, allowing the humidity inside the steam oven to quickly approach the target value. Subsequently, it combines proportional-integral-derivative control to achieve precise humidity control. When the current humidity is detected to be too high and deviates significantly, it introduces dry and cold air by opening the air intake valve to reduce the humidity. This method can accurately maintain the required humidity environment at different cooking temperatures, improving the stability of humidity control and thus improving cooking results and user experience.

[0072] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0073] Figure 1 The flow chart of the humidity control method for the steam oven provided in the embodiments of this application Figure 1 The main implementer of this method is the humidity control device of the steam oven, which can be implemented through software and / or hardware. For example... Figure 1 As shown in the embodiment of this application, the humidity control method for a steam oven includes:

[0074] S101. Determine the target humidity of the cavity based on the target temperature of the oven cavity corresponding to the currently activated function.

[0075] The currently activated functions include, but are not limited to, working mode, recipe mode, or food processing mode; the cavity of the steam oven is an enclosed space used to hold food and perform heating, steaming, or baking.

[0076] The target temperature is the temperature that the oven cavity is expected to reach or maintain during the operation of the currently activated function.

[0077] Specifically, a correspondence between target temperature and target humidity can be established in advance. For example, by using a preset mapping relationship, querying a preset table, or using a preset algorithm, the target humidity that is compatible with the target temperature can be matched or calculated based on the target temperature corresponding to the currently activated function.

[0078] This pre-established correspondence can be set in conjunction with the hardware parameters of the steam oven and the humidity requirements under different cooking scenarios to ensure the compatibility between the target humidity and the target temperature.

[0079] It is understandable that steam ovens typically have different target temperatures and humidity levels depending on the operating mode, recipe, or food processing requirements, thus creating a suitable cooking environment to meet the corresponding cooking effects and food processing requirements.

[0080] S102. Determine the first humidification duration based on the target humidity, and control the steam generator of the steam oven to heat the cavity. When the temperature of the steam generator reaches the first temperature, start the timer until the timer duration reaches the first humidification duration.

[0081] The first humidification duration is calculated based on the target humidity and is the steam injection duration required to humidify the cavity humidity of the steam oven to the target humidity range. Its specific value is positively correlated with the target humidity value, that is, the higher the target humidity, the longer the first humidification duration.

[0082] The first temperature is the starting temperature threshold at which the steam generator can stably produce sufficient steam, ensuring that the steam entering the steam oven is continuous and uniform.

[0083] Understandably, after the steam generator is started, it needs to go through a certain heating process to reach the first temperature. During this process, the steam generator has not reached a stable steam production state, and the amount of steam produced is insufficient and unstable. Therefore, the timing is not started. Only when the temperature reaches the first temperature and the steam production is stable will the timing of the first humidification time begin, and steam will be continuously introduced into the cavity of the steam oven until the timing reaches the first humidification time, thereby ensuring that the humidity of the cavity is stably within the target humidity range.

[0084] S103. After the timing period reaches the first humidification period, the humidity of the cavity is controlled by proportional-integral-derivative control method according to the difference between the current humidity and the target humidity of the cavity. During the process of controlling the humidity of the cavity by proportional-integral-derivative control method, if the current humidity is greater than the target humidity and the difference between the current humidity and the target humidity is greater than the first preset threshold, the air inlet valve of the steam oven is opened to allow dry and cold air to enter the cavity.

[0085] The current humidity refers to the actual humidity value detected in real time after the cavity of the steam oven reaches the first humidification time. It can be obtained by the humidity sensor built into the steam oven.

[0086] The Proportional Integral Derivative (PID) control method outputs corresponding control parameters by performing proportional, integral, and derivative operations on the humidity deviation signal.

[0087] The first preset threshold is an upper limit for allowable humidity fluctuations, used to prevent the intake valve from frequently opening and closing due to humidity fluctuations.

[0088] Specifically, the steam oven compares the current actual humidity with the target humidity to obtain the humidity deviation between the two. Then, it uses proportional-integral-derivative (PID) control to process this humidity deviation and output a corresponding control signal to control the humidity within the steam oven cavity.

[0089] During the process of controlling the humidity of the steam oven cavity, when the actual humidity is not only higher than the target humidity, but the difference between the current actual humidity and the target humidity exceeds the preset allowable fluctuation range, the steam oven's air intake valve will be opened to introduce dry and cold air, thereby reducing the humidity of the steam oven cavity.

[0090] Understandably, by using proportional-integral-calculus control (PID) based on the difference between the current humidity and the target humidity, precise humidity control of the oven cavity can be achieved. However, during the process of using PID to control the humidity of the oven, there may be various interference factors such as water accumulation in the cavity, moisture release from the food itself, and fluctuations in the operation of the steam generator. These factors may cause the actual humidity under PID control to deviate from the target value.

[0091] Therefore, in the process of controlling the humidity of the steam oven using proportional-integral-calculus control, the current humidity of the cavity is detected in real time. When the current humidity is detected to be greater than the target humidity, and the difference between the current humidity and the target humidity is greater than the first preset threshold, the air inlet valve of the steam oven is opened to allow dry and cold air to enter the cavity of the steam oven. This air mixes fully with the high-temperature steam in the cavity and undergoes heat and moisture exchange, which can reduce the steam saturation and water content of the cavity, thereby causing the humidity of the steam oven cavity to drop rapidly and approach the target humidity.

[0092] The humidity control method for a steam oven provided in this application first determines the target humidity of the cavity based on the target temperature of the cavity corresponding to the currently activated function. Then, it calculates the first humidification time based on the target humidity, controls the steam generator to heat the cavity, and starts timing after heating to the first temperature until the first humidification time is reached to complete the initial humidification. Subsequently, the humidity of the cavity is controlled by a PID control method based on the difference between the current humidity and the target humidity. During the process of controlling the humidity of the cavity by the PID control method, if the difference between the current humidity and the target humidity exceeds a first preset threshold and the current humidity is too high, the air inlet valve is opened to introduce dry and cold air to adjust the humidity.

[0093] This method first determines the appropriate target humidity based on the target temperature, ensuring that the temperature and humidity match the actual cooking scenario. A set first temperature is used as the starting threshold for the steam generator to stably produce steam, preventing a decrease in humidity control accuracy due to low temperature or unstable steam output. Simultaneously, the first humidification duration can be dynamically set based on the target humidity, achieving precise control during the initial humidification stage. Subsequently, a PID control method is used for precise humidity control, enabling rapid response to humidity deviations. Combined with an air intake valve for air replenishment and dehumidification, it can quickly reduce humidity fluctuations when overshoot occurs, improving the accuracy and stability of the steam oven's humidity control. This ensures that preset humidity conditions are achieved in various cooking and food processing scenarios, enhancing the user experience.

[0094] Figure 2 The flow chart of the humidity control method for the hot steam oven provided in the embodiments of this application Figure 2 .like Figure 2 As shown. The embodiments of this application are described above. Figure 1 Based on the embodiments, the implementation process of humidity control in the steam oven is described in detail. The humidity control method for the steam oven provided in this application includes:

[0095] S201. Based on the currently activated function, determine whether to activate humidification and confirm the target temperature of the cavity.

[0096] In one implementation, users can select a working mode, recipe, or ingredients according to their needs. The working modes include, but are not limited to, steaming, baking, and steam-baking modes.

[0097] After the user makes their selection, based on the selected working mode, recipe, or ingredients, the system confirms the corresponding target temperature and automatically calls the preset humidification control function to determine whether the humidification function needs to be activated.

[0098] The target temperature can be set by the user using the temperature adjustment button, or it can be automatically matched and confirmed based on the selected working mode, recipe, or ingredients. If it is automatically matched, the corresponding recommended cooking temperature will be retrieved from the built-in database.

[0099] The humidification control function is based on the cooking characteristics of the working mode, recipe, or ingredients. It pre-configures humidification judgment conditions and automatically determines whether to perform humidification operation by matching the currently selected content with the humidification judgment conditions.

[0100] If the content selected by the user matches the humidification judgment conditions, that is, if it is automatically determined that humidification operation needs to be performed, the water volume entering the steam generator is controlled to reach the second preset threshold.

[0101] The second preset threshold is a water intake parameter that is pre-calibrated based on the humidity requirements of different working modes, recipes or ingredients. It is stored in the device's built-in parameter library and can be automatically called and matched as the cooking scene is switched.

[0102] For example, when a user selects egg tarts, that is, when the user selects the recipe for egg tarts or selects the corresponding steam-bake mode for egg tarts, the humidification control function will be automatically invoked according to the selected content, and the humidification determination condition will be used to confirm that the cooking process needs to start humidification.

[0103] In addition, the system matches the currently selected content with the humidification criteria, and automatically determines that humidification will not be performed if the selection is deemed invalid.

[0104] In one implementation, the oven temperature can be detected by a temperature sensor. When the temperature of the oven cavity is higher than a preset start-up temperature threshold, the cooling fan is activated; when the oven temperature is lower than a preset stop-down temperature threshold, the cooling fan is deactivated.

[0105] The preset start-up temperature threshold is higher than the preset stop-down temperature threshold, forming a reasonable temperature control range and avoiding frequent start-stop of the cooling fan. The preset start-up temperature threshold is usually set as the upper limit protection value of the cooking temperature to prevent the temperature of the oven cavity from becoming too high. The preset stop-down temperature threshold is the temperature at which the temperature has dropped to a reasonable range and no further heat dissipation is needed. Specific values ​​can be calibrated and adjusted according to the equipment model and cooking needs, and this application does not limit them.

[0106] Understandably, in operating modes without humidification, such as pure baking or convection baking, different cooking scenarios correspond to different target temperatures. For example, the target temperature for pure meat baking is usually 190-220℃, and the target temperature for cookie baking is usually 150-170℃. The heating element will work according to the preset cooking program until the temperature of the oven cavity reaches the target temperature, at which point the power supply will stop. However, the heating element itself will retain a very high amount of residual heat, which will continue to be released into the oven cavity. This causes the temperature of the oven cavity to continue to rise after the heating element stops supplying power. If heat dissipation is not carried out in time, the temperature may exceed the preset target cooking temperature range.

[0107] Therefore, when the temperature sensor detects that the cavity temperature exceeds the preset start-up temperature threshold, the cooling fan is automatically activated. By accelerating the airflow within the cavity, the residual heat from the heating element and excess heat from the cavity are quickly removed, thus rapidly cooling the cavity temperature of the steam oven. When the cavity temperature drops below the preset stop temperature threshold, it indicates that the temperature has returned to a reasonable range that matches the target cooking temperature, and there is no need to continue dissipating heat. At this point, the cooling fan is automatically stopped to prevent excessive heat dissipation from causing the cavity temperature of the steam oven to become too low.

[0108] For example, when the user selects potato chips as the ingredient or chooses the corresponding potato chip baking mode, the steam oven automatically determines the target temperature for that cooking scenario to be 180℃. Since potato chips require a dry, high-temperature environment to achieve a crispy texture, no additional humidification is needed. At this time, the temperature sensor inside the steam oven continuously monitors the temperature of the oven cavity in real time, and the heating element works according to the cooking program, stopping power supply after raising the cavity temperature to the target temperature of 180℃.

[0109] If the residual heat from the heating element causes the temperature inside the steam oven to rise continuously, when the temperature exceeds the preset start-up temperature threshold, such as 190℃ (the upper limit protection value corresponding to the target temperature of 180℃), the steam oven will automatically start the cooling fan to cool down and prevent the potato chips from burning due to excessive temperature. After the cooling fan has been running for a period of time, the temperature inside the cavity will gradually decrease. When the temperature is detected to be below the preset stop temperature threshold, such as 170℃ (the safe temperature that matches the target temperature), the steam oven will automatically stop the cooling fan to maintain the temperature inside the steam oven within a reasonable baking range of 170℃-180℃, ensuring that the potato chips can be baked effectively.

[0110] S202. If humidification is activated, start the cooling fan of the steam oven and begin preheating.

[0111] When it is determined that humidification of the steam oven is necessary, in order to prevent the moisture entering the steam oven cavity from forming condensation and to ensure the uniformity of the temperature in the steam oven cavity, the cooling fan is turned on to drive the airflow in the steam oven cavity and prevent excessive humidity in some areas of the cavity; at the same time, preheating is started simultaneously to make the cavity temperature rise rapidly and reach the set temperature.

[0112] Understandably, when the humidification function is activated, the steam generator will work and produce steam. If the steam is directly introduced into the cavity where the temperature is low or the airflow is stagnant, condensation will easily form, affecting the cooking effect. Therefore, when humidification is activated, the oven's cooling fan should be activated simultaneously to drive airflow in the oven cavity to promote steam diffusion and perform a preheating operation to raise the cavity temperature to the preset value.

[0113] S203. In response to preheating completion or user command, collect the current dew point temperature of the cavity and determine the target humidity of the cavity based on the target temperature of the cavity.

[0114] The preheating process can be completed automatically or terminated early or proceed to the next step according to user instructions; the dew point temperature of the cavity refers to the temperature at which the steam entering the cavity of the steam oven begins to condense under the current environment, which can usually be obtained in real time by the thermistor sensor built into the steam oven.

[0115] Understandably, after preheating, the temperature inside the steam oven gradually stabilizes and becomes more evenly distributed. At this point, by collecting the current dew point temperature of the oven cavity through sensors, the current humidity environment of the cavity can be accurately reflected. Simultaneously, based on the user-set target temperature, a target humidity level that the cavity should maintain at that temperature is determined through a preset algorithm or mapping relationship.

[0116] S204. Determine the first humidification duration based on the target humidity, and control the steam generator of the steam oven to heat the cavity. When the temperature of the steam generator reaches the first temperature, start the timer until the timer duration reaches the first humidification duration.

[0117] The initial humidification time can be calculated based on the current humidity parameters of the oven cavity and the target humidity value, and is used to determine the humidification time required for the oven cavity to reach the target humidity. Through fitting analysis of a large amount of experimental data, a linear correlation exists between the initial humidification time and the target humidity.

[0118] If the humidity parameter value of the current steam oven cavity is 0, that is, the cavity is in a completely dry state, the formula for calculating the first humidification time is:

[0119]

[0120] in, For the target humidity, the coefficients in the formula are fixed coefficients obtained through extensive testing and calibration before the steam oven leaves the factory, ensuring that the calculation results are highly matched with the actual humidification requirements, and are suitable for initial humidification scenarios when the cavity is dry.

[0121] If the humidity inside the oven cavity is not zero, meaning the cavity already has a certain level of humidity, the initial humidification time needs to be adjusted based on the current humidity value. The adjusted initial humidification time can be calculated based on the difference between the current humidity and the target humidity, combined with a preset compensation coefficient or correction table.

[0122] For example, assuming the target humidity is 50%, the cavity of the steam oven is initially in a completely dry state, i.e., the current humidity is 0. Substituting into the above formula, the corresponding first humidification duration can be calculated. for:

[0123]

[0124] That is, with the cavity completely dry, the first humidification time required when the target humidity is set to 50%RH is approximately 89 seconds.

[0125] After heating the steam generator to the first temperature, the humidification operation is performed according to the calculated first humidification time, such as 89 seconds, and the timer is started, so that the humidity of the cavity is increased from 0 to close to the target humidity, such as about 45%.

[0126] Furthermore, in one implementation, when the steam generator temperature reaches a first temperature, the water supply to the steam generator is controlled to reach a first preset duration. Subsequently, during the operation of the steam generator, when the steam generator operation time reaches a second preset duration, the water supply to the steam generator is controlled to reach the first preset duration.

[0127] The first preset duration is the single opening time of the water inlet valve, used to inject a fixed amount of water into the steam generator; the second preset duration is the time interval between two water replenishment operations, used to ensure that the steam generator can maintain a stable steam output between the two water replenishment operations.

[0128] It is understandable that by introducing water when the steam generator reaches the first temperature, and by periodically introducing water during operation at the second preset duration, the steam generator can be continuously replenished with water.

[0129] For example, when the temperature of the steam generator rises to the preset first temperature of 100°C, the water inlet valve of the steam generator is opened to replenish water for a first preset duration of 3 seconds. During the continuous operation of the steam generator, if the cumulative working time reaches the preset second preset duration of 40 seconds, the water inlet valve is opened again to replenish water for 3 seconds. This cycle is repeated until the humidification operation is completed.

[0130] S205. If the dew point temperature of the cavity is lower than the alarm temperature, the humidity of the oven cavity is controlled by proportional-integral-derivative control method based on the difference between the current humidity and the target humidity.

[0131] The alarm temperature is a critical temperature used to determine whether there is a risk of excessive condensation in the cavity. Its value is determined based on the real-time target temperature using a preset calculation formula, which is as follows:

[0132]

[0133] in, The coefficient 0.1684 and the constant 39.263 in the formula are fixed coefficients obtained through extensive testing and calibration before the steam oven leaves the factory. They can be adapted to the needs of judging the risk of condensation in the cavity of the steam oven under different target temperature conditions.

[0134] It is understandable that humidity sensors are greatly affected by temperature. When the temperature of the cavity fluctuates greatly or there are condensation droplets, the humidity data collected by the sensor will be inaccurate or it may even fail to work properly.

[0135] Therefore, by comparing the dew point temperature of the cavity with the alarm temperature, the current risk of condensation in the cavity can be accurately identified, allowing for the selection of a reasonable humidity control method.

[0136] When the dew point temperature of the cavity is lower than the alarm temperature, it indicates that the current risk of condensation in the cavity of the steam oven is low, and the humidity sensor can reliably collect the humidity signal. At this time, based on the difference between the current humidity and the target humidity, the humidity of the cavity of the steam oven is precisely adjusted using the PID control method.

[0137] In addition, if the dew point temperature is greater than or equal to the alarm temperature, it indicates that the cavity of the steam oven is at high risk of condensation. Condensation may have formed in the cavity, reducing the accuracy of the data collected by the humidity sensor or even causing it to fail. In this case, it is not necessary to rely on the humidity sensor to collect data.

[0138] In one implementation, the humidification interval and the second humidification duration are determined based on the target humidity, and the steam generator is controlled to operate for the second humidification duration according to the humidification interval.

[0139] The humidification interval is the pause time between two humidification operations; the second humidification duration is the duration of a single steam replenishment to the cavity. Both are determined based on the target humidity. The higher the target humidity, the shorter the humidification interval and the longer the second humidification duration. The specific parameters are determined by the factory-preset correspondence.

[0140] Specifically, the current target humidity is first obtained. Based on the factory-preset correspondence between the target humidity and the humidification interval and the second humidification duration, the humidification interval and the second humidification duration corresponding to the target humidity are matched. The steam generator is controlled to start and run continuously for the second humidification duration to replenish steam to the cavity. After a single humidification is completed, the steam generator is controlled to stop and remain in a paused state until the humidification interval ends. Then, the steam generator is restarted to perform the next humidification operation. This cycle is repeated to maintain the humidity of the oven cavity.

[0141] For example, the factory preset correspondence between target humidity and second humidification duration is shown in Table 1 below. Combined with a 1-minute working cycle, this table can be used to calculate the humidification interval duration corresponding to different target humidity levels.

[0142] Table 1

[0143]

[0144] As shown in Table 1, taking a 1-minute working cycle as an example, when the target humidity is set to 20%, the evaporator operates for 3 seconds per minute and stops for the remaining 57 seconds, meaning the second humidification duration is 3 seconds and the humidification interval is 57 seconds; when the target humidity is set to 30%, the steam generator operates for 5 seconds per minute and stops for the remaining 55 seconds, meaning the second humidification duration is 5 seconds and the humidification interval is 55 seconds; when the target humidity is set to 40%, the steam generator operates for 7 seconds per minute and stops for the remaining 53 seconds, meaning the second humidification duration is 7 seconds and the humidification interval is 53 seconds; when the target humidity is set to 50%, the steam generator operates for 9 seconds per minute and stops for the remaining 51 seconds, meaning the second humidification duration is 9 seconds and the humidification interval is... The humidification duration is 51 seconds; when the target humidity is set to 60%, the steam generator operates for 11 seconds per minute and stops operating for the remaining 49 seconds, i.e., the second humidification duration is 11 seconds and the humidification interval is 49 seconds; when the target humidity is set to 70%, the steam generator operates for 15 seconds per minute and stops operating for the remaining 45 seconds, i.e., the second humidification duration is 15 seconds and the humidification interval is 45 seconds; when the target humidity is set to 80%, the steam generator operates for 20 seconds per minute and stops operating for the remaining 40 seconds, i.e., the second humidification duration is 20 seconds and the humidification interval is 40 seconds; when the target humidity is set to 90%, the steam generator operates for 25 seconds per minute and stops operating for the remaining 35 seconds, i.e., the second humidification duration is 25 seconds and the humidification interval is 35 seconds.

[0145] S206. In the process of controlling the humidity of the cavity using the proportional-integral-derivative control method, if the current humidity is greater than the target humidity and the difference between the current humidity and the target humidity is greater than the first preset threshold, the air inlet valve of the steam oven is opened to allow dry and cold air to enter the cavity.

[0146] Among them, the exhaust vent of the steam oven is opened to expel high-temperature and high-humidity gas, and the air intake valve of the steam oven is opened to introduce dry and cold air from outside.

[0147] The high-temperature and high-humidity gas is hot and humid air formed by mixing dry and cold air with the steam in the cavity.

[0148] Understandably, when the steam oven detects that the current humidity in the cavity is greater than the target humidity during the humidity adjustment process, and the difference between the current humidity and the target humidity exceeds the first preset threshold, it indicates that the current humidity in the cavity is too high and has exceeded the allowable deviation range, and humidity reduction is required.

[0149] At this point, the steam generator stops heating to prevent the continuous generation of steam from causing the humidity to rise further; at the same time, the exhaust port is opened to expel the high temperature and high humidity gas from the cavity, and the air inlet valve is opened to introduce dry and cold air from outside into the cavity of the steam oven to achieve rapid dehumidification.

[0150] S207. If the difference between the current humidity and the target humidity is less than or equal to the first preset threshold, then control the exhaust port to close and control the intake valve to close.

[0151] Understandably, when the humidity inside the oven deviates little from the target humidity, closing the exhaust vent and intake valve can prevent unnecessary loss of heat and humidity inside the oven and maintain stable humidity inside the oven.

[0152] The control method for the steam oven provided in this application first determines whether humidification needs to be started based on the user-activated function and confirms the target temperature of the cavity. If humidification is not required, the cooling fan is started and stopped according to the cavity temperature to maintain temperature stability. If humidification is required, the cooling fan and preheating are started simultaneously. After preheating is completed or a user command is received, the current dew point temperature of the cavity is collected, and the target humidity of the cavity is determined based on the target temperature. Then, the first humidification duration is calculated based on the target humidity of the cavity, and the steam generator is controlled to heat and replenish water and humidify according to preset rules. The humidity is then adjusted by comparing the dew point temperature of the cavity with the alarm temperature and selecting PID control or intermittent humidification mode. During the PID humidity control process, the working status of the steam generator, exhaust port, and air inlet valve is controlled according to the difference between the current humidity and the target humidity to ensure that the humidity of the steam oven cavity is stable within the target range.

[0153] This method intelligently distinguishes humidification modes based on cooking functions to achieve precise adaptation of humidity control methods; in non-humidification mode, the temperature of the oven cavity is controlled by the cooling fan to ensure the stability of the cavity temperature; in humidification mode, preheating and cooling fans are started simultaneously to improve preheating efficiency and shorten cooking preparation time; the target humidity of the cavity is accurately determined by combining the dew point temperature and target temperature of the cavity and the humidification time is quantitatively calculated to quickly increase the humidity of the oven cavity to the target humidity range.

[0154] Subsequently, the adjustment method combining PID control and intermittent humidification can be adapted to different working conditions, making humidity adjustment more flexible and reliable. By controlling the steam generator, exhaust port and air inlet valve, the humidity of the steam oven cavity is kept stable within the target range, which can significantly improve the humidity control accuracy and stability of the steam oven, optimize cooking effect, and improve cooking efficiency and user experience.

[0155] This application provides a steam oven. The steam oven utilizes the humidity control method described above. The steam oven provided in this application includes: a main body, an air inlet valve, and a controller.

[0156] The main body is the cavity structure of the steam oven; the air intake valve includes a solenoid valve and an air intake piston, which is used to control the entry and exit of dry and cold air; the controller is electrically connected to the air intake valve and is used to implement the humidity control method of the steam oven, adjusting the humidity of the steam oven cavity by controlling the opening and closing of the air intake valve.

[0157] Specifically, when the solenoid valve is energized, it generates electromagnetic force to drive the intake piston, opening it and allowing dry, cold air from outside to smoothly enter the main body. When the solenoid valve is de-energized, the electromagnetic force disappears, the intake piston resets and closes, tightly sealing the intake passage, thereby blocking the entry of dry, cold air and ensuring stable humidity in the oven cavity.

[0158] The following is combined Figure 3 Further explanation of the intake valve Figure 3 This is a schematic diagram of the intake valve provided in an embodiment of this application. Wherein, Figure 3 (a) in the diagram is a front view of the intake valve. Figure 3 (b) in the diagram is a schematic diagram of the back structure of the intake valve.

[0159] like Figure 3 As shown, the intake valve includes a solenoid valve 301, a first wiring port 302, a second wiring port 303, a valve body 304, an intake port 305, an intake piston 306, an exhaust port 307, and a transformer module 308.

[0160] The first connection port 302 and the second connection port 303 are the power supply connection ports of the solenoid valve 301, which are used to connect with the transformer module 308 to provide working power to the solenoid valve 301; the valve body 304 is the main structure of the intake valve, which is used to install and support internal components such as the solenoid valve 301 and the intake piston 306; the intake port 305 is used to connect to an external dry and cold air source, serving as the inlet for dry and cold air to enter the intake valve; the intake piston 306 is located at the connection position between the intake port 305 and the valve body 304, and is used to control the opening and closing of the intake passage; the exhaust port 307 is fitted with an intake pipe, which is used to transport the dry and cold air introduced through the intake valve to the main body of the steam oven.

[0161] refer to Figure 3 When the solenoid valve 301 is energized, the intake piston 306 opens, and external dry and cold air enters the valve body 304 through the intake port 305, and then is introduced into the main body through the intake pipe connected to the exhaust port 307.

[0162] The air inlet pipe is connected to a convection fan located inside the main body. When the convection fan is powered on, its blade design creates negative pressure in the back area, drawing dry, cool air from the air inlet pipe into the cavity of the steam oven, achieving rapid and uniform humidity control.

[0163] When solenoid valve 301 is de-energized, the piston is sealed, preventing outside air from entering the oven cavity and stopping the humidity regulation process.

[0164] The steam oven provided in this application embodiment applies the humidity control method of the aforementioned steam oven, and mainly includes a main body, an air inlet valve, and a controller. The air inlet valve controls the entry of external dry and cold air through the opening and closing of a solenoid valve and an air inlet piston. The controller executes the humidity control method to adjust the humidity of the steam oven cavity. The air inlet valve has structures such as an air inlet and an air outlet. The air outlet is connected to a convection fan inside the main body through an air inlet pipe, and the negative pressure generated by the fan quickly and evenly draws dry and cold air into the cavity.

[0165] This application provides a humidity control device for a steam oven, which includes:

[0166] The determination module is used to determine the target humidity of the cavity based on the target temperature of the cavity of the steam oven corresponding to the currently activated function;

[0167] The determination module is also used to determine the first humidification duration based on the target humidity, and control the steam generator of the steam oven to heat up to humidify the cavity. When the temperature of the steam generator reaches the first temperature, the timing is started until the timing duration reaches the first humidification duration.

[0168] The control module is used to control the humidity of the cavity by using a proportional-integral-derivative (PID) control method based on the difference between the current humidity and the target humidity after the timing period reaches the first humidification period. During the process of controlling the humidity of the cavity by using the PID control method, if the current humidity is greater than the target humidity and the difference between the current humidity and the target humidity is greater than the first preset threshold, the air inlet valve of the steam oven is opened to allow dry and cold air to enter the cavity.

[0169] Optionally, the determining module is also used to determine whether to start humidification based on the currently activated function;

[0170] The determination module is also used to determine the target humidity of the cavity based on the target temperature of the oven cavity when humidification is determined to be started.

[0171] The humidity control device for the steam oven also includes: a start-up module;

[0172] The startup module is used to determine whether to start humidification based on the currently active function.

[0173] The determination module is also used to determine the target humidity based on the target temperature when humidification is determined to be started.

[0174] The humidity control device for the steam oven also includes: a data acquisition module;

[0175] The start-up module is also used to start the cooling fan of the steam oven and to start preheating;

[0176] The data acquisition module is used to acquire the current dew point temperature of the cavity in response to preheating completion or user commands;

[0177] The control module is also used to control the humidity of the oven cavity using a proportional-integral-derivative control method based on the difference between the current humidity and the target humidity if the dew point temperature of the cavity is lower than the alarm temperature.

[0178] Optionally, the control module is also used to determine the humidification interval and the second humidification duration based on the target humidity if the dew point temperature of the cavity is greater than or equal to the alarm temperature, and to control the steam generator to work for the second humidification duration according to the humidification interval.

[0179] Optionally, the control module is also used to control the first preset duration of water intake for the steam generator.

[0180] Optionally, the control module is also used to control the steam generator to enter water for a first preset time when the steam generator temperature reaches a first temperature.

[0181] The control module is also used to control the water intake of the steam generator for a first preset time when the steam generator has been in operation for a second preset time.

[0182] Optionally, the control module is also used to control the steam generator to stop heating and to control the exhaust port of the steam oven to open;

[0183] The control module is also used to close the exhaust port and the intake valve if the difference between the current humidity and the target humidity is less than or equal to a preset threshold.

[0184] Figure 4 This is a schematic diagram of the humidity control device for a steam oven provided in an embodiment of this application. Figure 4 As shown, this application embodiment provides a humidity control device for a steam oven. The humidity control device 40 for the steam oven includes: a receiver 401, a transmitter 402, a processor 403, and a memory 404.

[0185] Receiver 401 is used to receive instructions and data;

[0186] Transmitter 402 is used to send commands and data;

[0187] Memory 404 is used to store instructions executed by the computer;

[0188] The processor 403 is used to execute computer execution instructions stored in the memory 404 to implement the various steps of the humidity control method of the steam oven in the above embodiments. For details, please refer to the relevant descriptions in the aforementioned embodiments of the humidity control method of the steam oven.

[0189] Optionally, the memory 404 can be either standalone or integrated with the processor 403.

[0190] When the memory 404 is set up independently, the electronic device also includes a bus for connecting the memory 404 and the processor 403.

[0191] This application also provides a computer-readable storage medium storing computer-executable instructions. When a processor executes the computer-executable instructions, it implements the humidity control method of the steam oven as described above, which is performed by the humidity control device of the steam oven.

[0192] This application also provides a computer program product, which includes a computer program. When the computer program is executed by a processor, it implements the humidity control method of the steam oven as described above, performed by the humidity control device of the steam oven.

[0193] It will be understood by those skilled in the art that all or some of the steps, systems, or apparatuses disclosed above, and their functional modules / units, can be implemented as software, firmware, hardware, or suitable combinations thereof. In hardware implementations, the division between functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed collaboratively by several physical components. Some or all physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit (ASIC). Such software may be distributed on a computer-readable medium, which may include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically contain computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0194] The technical solutions of this application have been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A humidity control method for a steam oven, characterized in that, include: Based on the target temperature of the oven cavity corresponding to the currently activated function, the target humidity of the cavity is determined, wherein different cooking scenarios correspond to different target temperatures; The first humidification duration is determined based on the target humidity, and the steam generator of the steam oven is controlled to heat up to humidify the cavity. When the temperature of the steam generator reaches the first temperature, the timer is started until the timer duration reaches the first humidification duration. The first temperature is the starting temperature threshold at which the steam generator can stably generate sufficient steam. The first humidification duration is calculated based on the current humidity parameter value of the cavity of the steam oven and the target humidity value through a preset formula. After the timing period reaches the first humidification period, if the current dew point temperature of the cavity is lower than the alarm temperature, the humidity of the cavity is controlled using a proportional-integral-derivative (PID) control method based on the difference between the current humidity and the target humidity. During the control of the cavity humidity using the PID control method, if the current humidity is greater than the target humidity and the difference between the current humidity and the target humidity is greater than a first preset threshold, the steam generator is controlled to stop heating, the exhaust port of the steam oven is controlled to open, and the air inlet valve of the steam oven is controlled to open to allow dry, cold air to enter the cavity. If the difference between the current humidity and the target humidity is less than or equal to the first preset threshold, the exhaust port is controlled to close, and the air inlet valve is controlled to close. If the current dew point temperature of the cavity is greater than or equal to the alarm temperature, then the humidification interval and the second humidification duration are determined according to the target humidity, and the steam generator is controlled to work for the second humidification duration according to the humidification interval. The alarm temperature is a critical temperature used to determine whether there is a risk of excessive condensation in the cavity, and its calculation formula is as follows: , The target temperature.

2. The method according to claim 1, characterized in that, The step of determining the target humidity of the oven cavity based on the target temperature of the cavity corresponding to the currently activated function includes: Determine whether to activate humidification based on the currently activated function; When humidification is activated, the target humidity of the cavity is determined based on the target temperature of the oven cavity.

3. The method according to claim 2, characterized in that, Before determining the target humidity of the cavity based on the target temperature of the oven cavity, the method further includes: Turn on the cooling fan of the steam oven and start preheating; In response to preheating completion or user command, the current dew point temperature of the cavity is collected.

4. The method according to claim 2, characterized in that, Before determining the target humidity of the cavity based on the target temperature of the oven cavity, the method further includes: The amount of water entering the steam generator is controlled to reach a second preset threshold.

5. The method according to any one of claims 1-4, characterized in that, The method further includes: When the temperature of the steam generator reaches the first temperature, the water entering the steam generator is controlled for a first preset time. During the operation of the steam generator, when the steam generator operates for a second preset duration, the water intake of the steam generator is controlled for a first preset duration.

6. A steam oven, characterized in that, include: Main body, intake valve and controller; The intake valve includes a solenoid valve and an intake piston. When the solenoid valve is energized, the intake piston opens to allow dry, cold air to enter the main body; when the solenoid valve is de-energized, the intake piston closes. The controller is used to perform the method as described in any one of claims 1-5.

7. A humidity control device for a steam oven, characterized in that, include: The determination module is used to determine the target humidity of the cavity based on the target temperature of the cavity of the steam oven corresponding to the currently activated function, wherein different cooking scenarios correspond to different target temperatures; The determining module is further configured to determine a first humidification duration based on the target humidity, and control the steam generator of the steam oven to heat up to humidify the cavity. When the temperature of the steam generator reaches a first temperature, a timer is started until the timer duration reaches the first humidification duration. The first temperature is the starting temperature threshold at which the steam generator can stably generate sufficient steam. The first humidification duration is calculated based on the current humidity parameter value of the cavity of the steam oven and the target humidity value through a preset formula. The control module is configured to, after the timing period reaches the first humidification period, if the current dew point temperature of the cavity is less than the alarm temperature, control the humidity of the cavity using a proportional-integral-derivative (PID) control method based on the difference between the current humidity and the target humidity. During the control of the cavity humidity using the PID control method, if the current humidity is greater than the target humidity and the difference between the current humidity and the target humidity is greater than a first preset threshold, then the module controls the steam generator to stop heating, controls the exhaust port of the steam oven to open, and controls the air inlet valve of the steam oven to open to allow dry, cold air to enter the cavity; if the difference between the current humidity and the target humidity is less than or equal to the first preset threshold, then the module controls the exhaust port to close and the air inlet valve to close. If the current dew point temperature of the cavity is greater than or equal to the alarm temperature, then the humidification interval and the second humidification duration are determined according to the target humidity, and the steam generator is controlled to work for the second humidification duration according to the humidification interval. The alarm temperature is a critical temperature used to determine whether there is a risk of excessive condensation in the cavity, and its calculation formula is as follows: , The target temperature.

8. A humidity control device for a steam oven, characterized in that, include: Memory; processor; The memory stores computer-executed instructions; The processor executes computer execution instructions stored in the memory to implement the humidity control method of the steam oven as described in any one of claims 1-5.

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