Steaming oven control method and device and steaming oven

Abstract

The invention relates to a steaming oven control method and device and a steaming oven. After the oven cavity temperature in an oven cavity, serving as a cooking cavity, of the steaming oven is obtained, under the condition that the oven cavity temperature reaches a target temperature lower limit value, the steaming oven is controlled to enter a temperature maintaining stage, and in the temperature maintaining stage, the weight of condensate water in a water collecting groove formed in the bottom of the oven cavity is obtained; the working state of a heating device of the steaming oven is controlled based on the size relation between the weight of the condensate water and a preset weight threshold value, and the condensate water in the water collecting tank is evaporated when the heating device works. According to the steam oven, the evaporation degree of residual condensate water can be adjusted, excessive residual water caused by insufficient evaporation is avoided, the problems that the temperature of the oven cavity is higher than that of a steaming mode, the steaming mode is changed into a baking mode, and steamed food becomes dry and firewood due to the fact that the heating device continues to heat after evaporating the residual condensate water are solved, and the cooking quality is improved. Therefore, the use reliability of the steaming oven is comprehensively improved.

Description

Technical Field

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

[0002] Steam ovens combine steam and baking functions, significantly improving cooking efficiency and culinary versatility, making them an increasingly widely used multifunctional cooking appliance.

[0003] Steam ovens cook food by generating steam through a steam generator. However, an unavoidable problem with steaming is the accumulation of condensation inside the oven cavity after steaming. This condensation can easily breed bacteria and produce unpleasant odors, affecting cooking safety. Furthermore, the condensation needs to be manually cleaned, which is inconvenient. Therefore, traditional steam ovens have low reliability. Summary of the Invention

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

[0005] In a first aspect, this application provides a method for controlling a steam oven, the method comprising:

[0006] The temperature inside the oven cavity of the steam oven is obtained; the oven cavity is a cooking cavity.

[0007] When the oven cavity temperature reaches the target lower limit, the steam oven is controlled to enter the temperature maintenance stage;

[0008] During the temperature maintenance stage, the weight of the condensate in the water collection tank of the steam oven is obtained; the water collection tank is located at the bottom of the oven cavity, and the bottom of the oven cavity is on the inner wall of the oven cavity, near the placement surface of the steam oven;

[0009] Based on the relationship between the weight of the condensate and a preset weight threshold, the working state of the heating device of the steam oven is controlled; when the heating device is working, it evaporates the condensate in the water collection tank.

[0010] In one embodiment, the preset weight threshold includes a first preset weight threshold, and controlling the operating state of the heating device of the steam oven based on the relationship between the weight of the condensate and the preset weight threshold includes:

[0011] If the weight of the condensate is less than the first preset weight threshold, the heating device is controlled to stop working;

[0012] When the weight of the condensate is greater than or equal to the first preset weight threshold, the heating device is controlled to operate.

[0013] In one embodiment, the preset weight threshold further includes a second preset weight threshold, which is greater than the first preset weight threshold. Controlling the heating device to operate when the weight of the condensate is greater than or equal to the first preset weight threshold includes:

[0014] When the weight of the condensate is greater than or equal to the first preset weight threshold and less than or equal to the second preset weight threshold, the heating device is controlled to operate at a first power.

[0015] If the weight of the condensate is greater than the second preset weight threshold, the heating device is controlled to operate at a second power, which is greater than the first power.

[0016] In one embodiment, after the oven reaches the target lower temperature limit and the steam oven enters the temperature maintenance stage, the method further includes:

[0017] Obtain the furnace cavity temperature during the temperature maintenance stage;

[0018] When the oven cavity temperature during the temperature maintenance stage is lower than the target lower limit, the steam generator of the steam oven is controlled to operate; when the steam generator operates, it generates and introduces steam into the oven cavity.

[0019] If the furnace temperature during the temperature maintenance phase is greater than or equal to the lower limit of the target temperature, the steam generator shall be controlled to stop operating.

[0020] In one embodiment, before obtaining the cavity temperature within the oven cavity, the method further includes:

[0021] In response to the start command, the steam oven is controlled to enter the heating stage;

[0022] During the heating phase, the steam generator of the steam oven is controlled to operate.

[0023] In one embodiment, controlling the operation of the steam generator during the heating phase includes:

[0024] During the heating phase, the steam generator and the heating device are controlled to operate.

[0025] Secondly, this application also provides a steam oven control device, the device comprising:

[0026] A temperature acquisition module is used to acquire the temperature inside the oven cavity of the steam oven; the oven cavity is a cooking cavity.

[0027] The temperature maintenance judgment module is used to control the steam oven to enter the temperature maintenance stage when the oven cavity temperature reaches the target lower limit value;

[0028] The weight acquisition module is used to acquire the weight of the condensate in the water collection tank of the steam oven during the temperature maintenance stage; the water collection tank is located at the bottom of the oven cavity, and the bottom of the oven cavity is the side of the inner wall of the oven cavity near the placement surface of the steam oven;

[0029] The heating control module is used to control the working state of the heating device of the steam oven based on the relationship between the weight of the condensate and a preset weight threshold; when the heating device is working, it evaporates the condensate in the water collection tank.

[0030] Thirdly, this application also provides a steam oven, including an oven cavity, a temperature detection device, a steam generator, a heating device, a weight detection device, and a controller. The temperature detection device and the heating device are both disposed inside the oven cavity. A water collection tank is provided at the bottom of the oven cavity, and the bottom of the oven cavity is located on the inner wall of the oven cavity, near the placement surface of the steam oven. The steam generator is connected to the oven cavity, and the temperature detection device, the steam generator, the heating device, and the weight detection device are all connected to the controller.

[0031] The temperature detection device is used to detect the furnace temperature inside the furnace cavity and send it to the controller. The weight detection device is used to detect the weight of the condensate in the water collection tank and send it to the controller. The controller is used to execute the above method.

[0032] In one embodiment, the weight detection device includes a pressure sensor disposed on the side of the water collection tank away from the furnace cavity and connected to the controller.

[0033] In one embodiment, the heating device includes heating tubes disposed at the bottom of the furnace cavity, and the number of heating tubes is at least two.

[0034] The aforementioned steam oven control method, device, and oven, after acquiring the oven cavity temperature (which serves as the cooking chamber), control the oven to enter a temperature maintenance phase once the cavity temperature reaches the target lower limit. During this phase, the weight of the condensate in the water collection tank at the bottom of the cavity is measured. Based on the relationship between the condensate weight and a preset weight threshold, the operating state of the oven's heating element is controlled. The heating element evaporates the condensate in the water collection tank. Therefore, during the temperature maintenance phase, the heating element can evaporate residual condensate in the cavity, reducing its amount. The steam from this secondary evaporation can also be used to heat the food, improving energy efficiency. This eliminates the need for manual cleaning of residual condensate, making it convenient to use. Furthermore, by controlling the heating element's operating state based on the relationship between the condensate weight and the preset weight threshold during the temperature maintenance phase, the degree of evaporation of residual condensate can be adjusted. This avoids excessive residual water due to insufficient evaporation and solves the problems of the oven cavity temperature exceeding the steaming mode temperature, the steaming mode turning into a baking mode, and the steamed food becoming dry and tough due to continued heating after the residual condensate has been evaporated, thus improving cooking quality. This comprehensively improves the reliability of the steam oven. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the structure of a steam oven in one embodiment;

[0037] Figure 2 This is a flowchart illustrating a steam oven control method in one embodiment;

[0038] Figure 3 This is a flowchart illustrating the steps of controlling the working state of the heating device of a steam oven based on the relationship between the weight of condensate and a preset weight threshold in one embodiment.

[0039] Figure 4 This is a flowchart illustrating the steps for controlling the operation of the heating device when the weight of the condensate is greater than or equal to a first preset weight threshold, as shown in one embodiment.

[0040] Figure 5 This is a flowchart illustrating the control method for a steam oven in another embodiment;

[0041] Figure 6 This is a flowchart illustrating the control method for a steam oven in yet another embodiment;

[0042] Figure 7 This is a flowchart illustrating the control method for a steam oven in another embodiment;

[0043] Figure 8 This is a schematic block diagram of the control device for a steam oven in one embodiment;

[0044] Figure 9 This is a schematic diagram of the working process of a steam oven in one embodiment. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0046] The steam oven control method provided in this application embodiment is used to control a steam oven. Wherein, as... Figure 1 As shown, the steam oven includes a cavity 2, a steam generator 5, a heating element 6, a water collection tank 4, and a controller 1. The heating element 6 is located inside the cavity 2, and the steam generator 5 is connected to the cavity 2. Both the steam generator 5 and the heating element 6 are connected to the controller 1. Specifically, the cavity 2 is the core working space for cooking in the steam oven, serving as the cooking chamber to hold the food to be cooked. It is typically made of high-temperature and corrosion-resistant materials and has good sealing properties to maintain internal temperature and humidity. The cavity 2 serves as the core load-bearing structure, with the heating element 6 located inside it, and the steam generator 5 connected to it via pipes or other means.

[0047] The steam generator 5 is used to generate high-temperature steam required for cooking and delivers the steam to the oven cavity 2, making it the core component for the "steaming" function. The steam generator 5 is connected to the oven cavity 2 via steam pipes or other structures, and its operation is controlled by the controller 1. The steam generator 5 typically includes a water storage device and a heating unit. The controller 1 controls the heating unit to rapidly heat the water into steam, which is then introduced into the oven cavity 2 via a solenoid valve or pump. The heating element 6 is used to heat the air inside the oven cavity 2 and is the core component for the "baking" function. The heating element 6 is located inside the oven cavity 2 and electrically connected to the controller 1, whose operation is controlled by the controller 1. The heating element 6 typically includes one or more sets of heating elements, such as upper and lower heating elements located at the top and bottom of the oven cavity 2, as well as annular heating elements and a fan for hot air circulation.

[0048] A water collection tank 4 is located at the bottom of the oven cavity 2, which is the inner wall of the oven cavity 2, near the placement surface of the steam oven. The water collection tank 4 is a container or recess specifically designed to collect and temporarily store liquids, specifically condensate generated during the steaming process. This condensate originates from the condensation of water droplets formed when the high-temperature steam entering the oven cavity 2 encounters the relatively cooler food, inner walls, or grill rack, releasing latent heat. These water droplets naturally drip and collect in the water collection tank 4 at the bottom of the oven cavity under gravity.

[0049] The water collection tank 4 is detachably installed at the bottom of the oven cavity 2 for easy removal and cleaning by the user. The bottom of the oven cavity 2 is the side of the inner wall of the oven cavity 2 closest to the placement surface of the steam oven. Taking the steam oven as an example, placed on a plane parallel to the ground, the bottom of the oven cavity is the side of the inner wall of the oven cavity closest to the ground. The inner wall of the oven cavity forms the physical boundary of the oven cavity space, and the bottom of the oven cavity is the lowest point of the physical space of the oven cavity. Placing the water collection tank at the bottom of the oven cavity allows for better utilization of gravity to collect condensate in the water collection tank.

[0050] Controller 1 is the control center of the steam oven. Controller 1 is electrically connected to both the steam generator 5 and the heating element 6. Controller 1 can receive signals, such as user input of function, temperature, and time settings via an interactive device. The interactive device can be a touchscreen, buttons, or voice control. Controller 1 can also send control commands to the heating element 6 and the steam generator 5 to control their operating status, ensuring that the actual temperature and humidity inside the oven cavity 2 change according to cooking requirements.

[0051] The control method for the steam oven can be executed by a controller within the steam oven, or by a terminal or server that is communicatively connected to the steam oven. The terminal can be, but is not limited to, various personal computers, laptops, smartphones, tablets, IoT devices, and portable wearable devices. The server can be a standalone physical server, a server cluster or distributed system consisting of multiple physical servers, or a cloud server providing cloud computing services.

[0052] In one exemplary embodiment, such as Figure 2 As shown, a method for controlling a steam oven is provided. Taking the execution of this method by a controller as an example, it includes the following steps 202 to 208. Wherein:

[0053] Step 202: Obtain the oven cavity temperature of the steam oven.

[0054] The oven cavity is the cooking chamber. It is used to hold food and cook it, and can be a closed or semi-closed cavity. Oven cavity temperature is a key parameter reflecting the cooking environment.

[0055] The oven cavity temperature of a steam oven can be obtained by detecting the oven cavity temperature using a temperature detection device and then sending the result to the controller. For example, Figure 1 As shown, the temperature detection device 3 is installed inside the furnace cavity 2, either on the inner wall of the furnace cavity 2 or in a specific air duct, and is connected to the controller. The temperature detection device 3 detects and monitors the actual temperature inside the furnace cavity 2 as the furnace cavity temperature, and then sends the detected temperature signal (usually an electrical signal) to the controller 1 as the basis for the controller 1 to make feedback control decisions. The type of temperature detection device 3 is not limited; for example, it can be a thermocouple or a thermistor.

[0056] The temperature of the furnace cavity is detected by a temperature sensing device installed inside the furnace cavity. The controller continuously acquires the furnace cavity temperature or acquires the furnace cavity temperature at a certain sampling frequency, which can be selected according to actual needs.

[0057] Step 204: When the oven cavity temperature reaches the target lower limit, control the steam oven to enter the temperature maintenance stage.

[0058] The target lower temperature limit is a preset temperature threshold, typically close to but lower than the target cooking temperature. The target cooking temperature is the user-set ideal cooking temperature (e.g., 100℃) or the default target temperature for the cooking program. The difference between the target cooking temperature and the target lower temperature limit can be set according to actual conditions, for example, it can be a temperature value within the range of 2-5℃, including the endpoints of 2℃ and 5℃. Correspondingly, the preset lower temperature limit can be 98℃ or 95℃. The target lower temperature limit is the condition that triggers the entry into the temperature maintenance phase.

[0059] The temperature maintenance stage refers to the precise control stage performed to maintain a stable temperature after the oven cavity temperature reaches near the target cooking temperature.

[0060] The controller compares the real-time oven cavity temperature with the preset target lower limit. When the oven cavity temperature reaches or exceeds the lower limit, a stage switching signal is generated to control the steam oven to enter the temperature maintenance stage.

[0061] Step 206: During the temperature maintenance stage, obtain the weight of the condensate in the water collection tank of the steam oven.

[0062] The water collection tank is located at the bottom of the oven cavity, which is the inner wall of the oven cavity, on the side closest to the placement surface of the steam oven. Details regarding the water collection tank have been explained above and will not be repeated here.

[0063] The weight of the condensate in the water collection tank of the steam oven can be obtained by using a weight detection device to measure the weight of the condensate in the tank and then sending the data to the controller. The weight detection device is located within the water collection tank; its specific location depends on the type of device used.

[0064] For example, when the weight detection device is a pressure sensor, the pressure sensor is located on the side of the water collection tank away from the furnace cavity, i.e., on the back of the water collection tank, and is connected to the controller. When there is water in the water collection tank, the pressure sensor can detect the pressure. The pressure detected by the pressure sensor varies depending on the amount of condensate in the water collection tank. Therefore, the controller can obtain the weight of the condensate in the water collection tank by analyzing the pressure data detected by the pressure sensor.

[0065] Alternatively, when the weight detection device is a liquid level sensor, the liquid level sensor is installed on the inner wall of the water collection tank and connected to the controller. The liquid level sensor can detect the water level in the water collection tank and send it to the controller. By analyzing the water level detected by the liquid level sensor, combined with the shape and size of the water collection tank, the controller can obtain the volume of condensate in the water collection tank. Furthermore, since the density of condensate is generally relatively stable, the weight of the condensate in the water collection tank can be calculated based on the volume and density of the condensate. It is understood that in other embodiments, the weight detection device may be of other types, which are not limited here.

[0066] The weight of the condensate in the collection tank is detected by a weight detection device. The controller continuously acquires the weight of the condensate in the collection tank or acquires the weight of the condensate in the collection tank at a certain sampling frequency, which can be selected according to actual needs.

[0067] Step 208: Based on the relationship between the weight of the condensate and the preset weight threshold, control the working state of the heating device of the steam oven.

[0068] The heating device evaporates the condensate in the water collection tank during operation. The heating device is located inside the furnace cavity to heat the cavity and raise its temperature. The heating device typically includes one or more sets of heating elements, such as upper and lower heating elements located at the top and bottom of the furnace cavity, as well as annular heating elements and rear-mounted hot air heating elements for hot air circulation.

[0069] The preset weight threshold is a pre-set weight critical value used to determine the amount of condensate and control the working status of the heating device accordingly.

[0070] During the temperature maintenance phase, the controller compares the weight of the condensate with a preset weight threshold in real time. Based on the comparison result, it generates corresponding control commands and sends them to the heating device to control its operating status. The operating status of the heating device can include whether it is working and its heating power.

[0071] For example, when the weight of the condensate is less than a preset weight threshold, it indicates that there is little condensate in the collection tank, and no treatment is needed. When the weight of the condensate is greater than the preset weight threshold, it indicates that there is a lot of condensate in the collection tank, which may cause adverse effects, and treatment is required. Based on the relationship between the weight of the condensate and the preset weight threshold, the controller controls the operating state of the heating element of the steam oven. The operating state of the heating element affects the weight of the condensate in the collection tank. For example, when the heating element is working, it can evaporate the condensate in the collection tank, reducing the amount of condensate. Therefore, by controlling the operating state of the heating element, the weight of the condensate in the collection tank can be kept within a reasonable range.

[0072] The aforementioned steam oven control method, after obtaining the oven cavity temperature (which serves as the cooking chamber), controls the steam oven to enter a temperature maintenance phase once the cavity temperature reaches the target lower limit. During this phase, the weight of the condensate in the water collection tank at the bottom of the cavity is measured. Based on the relationship between the condensate weight and a preset weight threshold, the operating state of the heating element is controlled, causing it to evaporate the condensate in the collection tank. Therefore, during the temperature maintenance phase, the heating element evaporates residual condensate in the cavity, reducing its amount. The steam from this secondary evaporation can also be used to heat the food, improving energy efficiency. This eliminates the need for manual cleaning of residual condensate, making it convenient to use. Furthermore, by controlling the heating element's operation based on the relationship between the condensate weight and the preset weight threshold during the temperature maintenance phase, the degree of evaporation of residual condensate can be adjusted. This avoids insufficient evaporation leading to excessive residual water and solves the problems of the cavity temperature exceeding the steaming mode temperature, the steaming mode turning into a baking mode, and the steamed food becoming dry and tough due to continued heating after the residual condensate has been evaporated, thus improving cooking quality. This comprehensively improves the reliability of the steam oven.

[0073] In one exemplary embodiment, the preset weight threshold includes a first preset weight threshold. For example... Figure 3 As shown, step 208 includes steps 302 and 304. Wherein:

[0074] Step 302: When the weight of the condensate is less than the first preset weight threshold, control the heating device to stop working.

[0075] Step 304: When the weight of the condensate is greater than or equal to the first preset weight threshold, control the heating device to work.

[0076] The first preset weight threshold is the minimum critical value for the weight of condensate, typically set to 20g. User surveys indicate that most users find residual condensate less than 20g acceptable, and cleaning is easier with less than 20g; users can easily wipe it clean with a towel.

[0077] When the weight of the condensate is less than a first preset weight threshold, it indicates that there is little condensate in the collection tank. If the heating element operates under these conditions, it may cause the oven cavity temperature to exceed the steaming mode temperature, the steaming mode to become a baking mode, and the steamed food to become dry and tough. Therefore, in this situation, the controller stops the heating element from operating to reduce the probability of oven cavity overheating.

[0078] When the weight of the condensate is greater than or equal to a first preset weight threshold, it indicates that there is too much condensate in the collection tank. In this case, the condensate may affect the safety of the oven cavity and the quality of cooking. Therefore, under these circumstances, the controller activates the heating element to evaporate the condensate in the collection tank, thus reducing the amount of condensate.

[0079] In this embodiment, the heating device stops working when the weight of the condensate is less than a first preset weight threshold, and starts working when the weight of the condensate is greater than or equal to the first preset weight threshold. This allows for both stopping heating when the amount of condensate in the collection tank is low, effectively preventing overheating of the furnace cavity and saving energy, and controlling heating when the amount of condensate in the collection tank is high, promptly treating accumulated water and reducing the adverse effects of bacterial growth and odor.

[0080] In an exemplary embodiment, the preset weight threshold further includes a second preset weight threshold, which is greater than the first preset weight threshold. For example... Figure 4 As shown, step 304 includes steps 402 and 404. Wherein:

[0081] Step 402: When the weight of the condensate is greater than or equal to the first preset weight threshold and less than or equal to the second preset weight threshold, control the heating device to operate at the first power.

[0082] Step 404: If the weight of the condensate is greater than the second preset weight threshold, control the heating device to operate at the second power.

[0083] The second preset weight threshold is greater than the first preset weight threshold. The second preset weight threshold is a higher critical value for the weight of condensate, usually set to 100g, indicating that there is a lot of water accumulation and more intensive treatment is needed.

[0084] The second power is greater than the first power. The first power is the lower heating power, and the second power is the higher heating power. The specific values ​​of the first and second powers are not fixed and can be determined based on actual conditions. The controller can control the power of the heating device by adjusting the duty cycle of the signal sent to the heating device, resulting in accurate control. Alternatively, when the heating device includes multiple heating elements, the controller can control the power of the heating device by controlling the number of operating heating elements, simplifying the control process.

[0085] When the weight of the condensate is greater than or equal to a first preset weight threshold and less than or equal to a second preset weight threshold, the condensate in the collection tank is considered to be at a moderate level. At this time, the controller controls the heating device to operate at a lower first power, which can both evaporate the condensate in the collection tank and reduce the occurrence of overheating of the furnace cavity due to excessive heating of the heating device, and also save energy.

[0086] When the weight of the condensate exceeds the second preset weight threshold, it indicates that there is a large amount of condensate in the collection tank. At this time, the controller controls the heating device to operate at a higher second power, which can quickly evaporate the condensate in the collection tank and improve the evaporation efficiency.

[0087] In this embodiment, when the weight of the condensate is greater than or equal to a first preset weight threshold and less than or equal to a second preset weight threshold, the heating device is controlled to operate at a first power. When the weight of the condensate is greater than the second preset weight threshold, the heating device is controlled to operate at a second power. This achieves power matching with water volume, optimizes energy efficiency, reduces energy waste caused by high-power heating with small water volumes, and can handle large water volumes with full power, preventing water accumulation, overflow, and bacterial growth. Through multi-level control, the adaptability and flexibility of the steam oven are improved.

[0088] In one exemplary embodiment, such as Figure 5 As shown, after step 204, the steam oven control method further includes steps 502 to 506. Wherein:

[0089] Step 502: Obtain the furnace cavity temperature during the temperature maintenance stage.

[0090] The furnace cavity temperature during the temperature maintenance stage refers to the furnace cavity temperature obtained during this stage. It can be understood that the furnace cavity temperatures at different stages can all be detected by the same temperature detection device and then sent to the controller.

[0091] Step 504: When the oven cavity temperature during the temperature maintenance stage is lower than the lower limit of the target temperature, control the steam generator of the steam oven to work.

[0092] The steam generator produces and introduces steam into the furnace cavity during operation. When the furnace cavity temperature during the temperature maintenance phase is lower than the lower limit of the target temperature, it indicates insufficient heat in the furnace cavity, requiring heating. In this case, the steam generator is controlled to operate, allowing the high-temperature steam it generates to be introduced into the furnace cavity, raising the furnace cavity temperature until it is greater than or equal to the lower limit of the target temperature.

[0093] Taking a steam generating device comprising a water pump, a heater, a solenoid valve, an inlet pipe, and an outlet pipe as an example, the water pump, heater, and solenoid valve are all connected to a controller. One end of the inlet pipe is connected to an external water source, and the other end is connected to the heater. One end of the outlet pipe is connected to the heater, and the other end is connected to the furnace chamber. The water pump is located in the inlet pipe, and the solenoid valve is located in the outlet pipe.

[0094] If the furnace temperature is lower than the lower limit of the target temperature during the temperature maintenance stage, the controller controls the water pump to start working, pumping water into the heater, then controls the heater to start, heating the water into steam, and then opens the solenoid valve to let the steam into the furnace.

[0095] Expandably, the controller can also adjust the power of the steam generator based on the difference between the target lower limit and the furnace cavity temperature during the temperature maintenance phase. For example, when the difference between the target lower limit and the furnace cavity temperature during the temperature maintenance phase is large, the steam generator is controlled to operate at a higher power to quickly change the furnace cavity temperature. When the difference between the target lower limit and the furnace cavity temperature during the temperature maintenance phase is small, the steam generator is controlled to operate at a lower power to slowly change the furnace cavity temperature to avoid over-temperature adjustment.

[0096] Step 506: If the furnace temperature during the temperature maintenance stage is greater than or equal to the lower limit of the target temperature, control the steam generator to stop working.

[0097] If the furnace cavity temperature during the temperature maintenance phase is greater than or equal to the lower limit of the target temperature, it indicates that the furnace cavity temperature meets the requirements. In this case, the steam generator is controlled to stop operating and steam generation is stopped.

[0098] Taking a steam generating device comprising a water pump, a heater, a solenoid valve, an inlet pipe, and an outlet pipe as an example, the water pump, heater, and solenoid valve are all connected to a controller. One end of the inlet pipe is connected to an external water source, and the other end is connected to the heater. One end of the outlet pipe is connected to the heater, and the other end is connected to the furnace chamber. The water pump is located in the inlet pipe, and the solenoid valve is located in the outlet pipe.

[0099] If the furnace temperature during the temperature maintenance phase is greater than or equal to the lower limit of the target temperature, the controller first shuts off the water pump to stop the water supply, then shuts off the heater after a delay of a few seconds (e.g., 5 seconds) to allow the residual water to evaporate, and finally closes the solenoid valve to prevent heat loss.

[0100] In this embodiment, the oven cavity temperature during the temperature maintenance stage is obtained. If the oven cavity temperature during the temperature maintenance stage is lower than the lower limit of the target lower temperature, the steam generator of the steam oven is controlled to operate. If the oven cavity temperature during the temperature maintenance stage is greater than or equal to the lower limit of the target lower temperature, the steam generator is controlled to stop operating. By controlling the operating state of the steam generator, the stability of the oven cavity temperature is maintained, the steaming quality is improved, and excessive intervention when the oven cavity temperature is within the ideal range is avoided, thus reducing energy consumption.

[0101] In one exemplary embodiment, such as Figure 6 As shown, before step 202, the steam oven control method also includes steps 601 and 602. Wherein:

[0102] Step 601: In response to the start command, control the steam oven to enter the heating stage.

[0103] Step 602: During the heating stage, control the steam generator of the steam oven to operate.

[0104] The start command can be a signal from the user to begin operation via an interactive device such as a control panel or a terminal device remotely connected to the steam oven. The start command may include parameters such as the user-selected cooking mode (e.g., "pure steam mode"), the target cooking temperature (e.g., 100°C), and the cooking time.

[0105] Upon receiving a start command, indicating a cooking demand, the controller activates the steam oven to begin operation, entering the heating phase. The heating phase is the operational period from start-up until the target lower temperature limit is reached.

[0106] During the heating phase, the controller controls the steam generator to operate, so that the high-temperature steam generated by the steam generator is introduced into the furnace cavity to raise the temperature of the furnace cavity.

[0107] Taking a steam generating device, which includes a water pump, a heater, a solenoid valve, an inlet pipe, and an outlet pipe, as an example, during the heating stage, the controller can control the water pump to operate at maximum flow, control the heater to heat at full power, and control the solenoid valve to fully open, so as to quickly generate a large amount of steam and rapidly increase the furnace temperature.

[0108] In this embodiment, in response to the start command, the steam oven is controlled to enter the heating stage, during which the steam generator is controlled to operate. The high-temperature steam generated by the steam generator can be used to heat the oven cavity, which not only allows the oven cavity temperature to reach the target lower limit value, but also increases the humidity inside the oven cavity to meet cooking requirements.

[0109] In one exemplary embodiment, such as Figure 7 As shown, step 602 includes step 702: during the heating stage, the steam generator is controlled to operate, and the heating device is controlled to operate.

[0110] Since the oven cavity temperature is usually low when the steam oven is first started, it would take a long time to heat the cavity using only the steam generated by the steam generator. Therefore, in this embodiment, during the heating phase, the steam generator and the heating element inside the oven cavity are controlled to operate. The heating element is activated during the heating phase to provide auxiliary heating, allowing the temperature inside the oven cavity to rise rapidly.

[0111] During the heating phase, the specific value of the duty cycle of the heating device is not limited and can be set according to actual needs. For example, the duty cycle of the heating device is 8:52. For instance, within one minute, the heating device works for 8 seconds and stops for 52 seconds, and this cycle repeats in one or more subsequent one-minute periods to generate heat.

[0112] In this embodiment, during the heating stage, the steam generator is controlled to work, and the heating device in the furnace cavity is also controlled to work, which greatly shortens the time for the furnace cavity temperature to rise to the preset lower limit value. Moreover, the dual heat sources work together to make the heating more uniform.

[0113] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0114] Based on the same inventive concept, this application also provides a steam oven control device for implementing the steam oven control method described above. The solution provided by this device is similar to the solution described in the above method; therefore, the specific limitations in one or more embodiments of the steam oven control device provided below can be found in the limitations of the steam oven control method described above, and will not be repeated here.

[0115] In one exemplary embodiment, such as Figure 8 As shown, a steam oven control device is provided, including: a temperature acquisition module 802, a temperature judgment module 804, a weight acquisition module 806, and a heating control module 808, wherein:

[0116] Temperature acquisition module 802 is used to acquire the temperature inside the oven cavity of the steam oven; the oven cavity is the cooking cavity;

[0117] The temperature maintenance judgment module 804 is used to control the steam oven to enter the temperature maintenance stage when the oven cavity temperature reaches the target lower limit value;

[0118] The weight acquisition module 806 is used to acquire the weight of the condensate in the water collection tank of the steam oven during the temperature maintenance stage; the water collection tank is located at the bottom of the oven cavity, which is the inner wall of the oven cavity, on the side close to the placement surface of the steam oven.

[0119] The heating control module 808 is used to control the working status of the heating device of the steam oven based on the relationship between the weight of the condensate and the preset weight threshold; when the heating device is working, it evaporates the condensate in the water collection tank.

[0120] In an exemplary embodiment, the preset weight threshold includes a first preset weight threshold, and the heating control module is further configured to control the heating device to stop working when the weight of the condensate is less than the first preset weight threshold; and to control the heating device to work when the weight of the condensate is greater than or equal to the first preset weight threshold.

[0121] In an exemplary embodiment, the preset weight threshold further includes a second preset weight threshold, which is greater than the first preset weight threshold. The heating control module is further configured to control the heating device to operate at a first power when the weight of the condensate is greater than or equal to the first preset weight threshold and less than or equal to the second preset weight threshold; and to control the heating device to operate at a second power when the weight of the condensate is greater than the second preset weight threshold, which is greater than the first power.

[0122] In an exemplary embodiment, the steam oven control device further includes a steam control module, which is used to acquire the oven cavity temperature during the temperature maintenance stage after the temperature maintenance judgment module controls the steam oven to enter the temperature maintenance stage; control the steam generator of the steam oven to work when the oven cavity temperature during the temperature maintenance stage is lower than the lower limit of the target temperature; generate and introduce steam into the oven cavity when the steam generator is working; and control the steam generator to stop working when the oven cavity temperature during the temperature maintenance stage is greater than or equal to the lower limit of the target temperature.

[0123] In an exemplary embodiment, the steam oven control device further includes a heating control module, which, in response to a start command, controls the steam oven to enter a heating phase before the temperature acquisition module acquires the oven cavity temperature; during the heating phase, it controls the steam generator to operate.

[0124] In an exemplary embodiment, the heating control module is also used to control the operation of the steam generator and the heating device in the furnace cavity during the heating phase.

[0125] Each module in the aforementioned steam oven control device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the corresponding operations of each module.

[0126] This application also provides a steam oven, including an oven cavity, a temperature detection device, a steam generator, a heating device, a weight detection device, and a controller. The temperature detection device and the heating device are both disposed inside the oven cavity. A water collection tank is provided at the bottom of the oven cavity, and the bottom of the oven cavity is located on the inner wall of the oven cavity, near the placement surface of the steam oven. The steam generator is connected to the oven cavity. The temperature detection device, the steam generator, the heating device, and the weight detection device are all connected to the controller. The temperature detection device is used to detect the temperature of the oven cavity and send it to the controller. The weight detection device is used to detect the weight of the condensate in the water collection tank and send it to the controller. The controller is used to execute the steps of any of the above method embodiments.

[0127] Specifically, the oven cavity is the core working space of a steam oven for cooking. As the cooking chamber, it holds the food to be cooked. It is usually made of high-temperature and corrosion-resistant materials and has good sealing properties to maintain the internal temperature and humidity. As the core load-bearing structure, the heating element is located inside the oven cavity, and the steam generator is connected to it through pipes or other means.

[0128] The steam generator is used to produce the high-temperature steam required for cooking and delivers it to the oven cavity; it is the core component for achieving the "steaming" function. The steam generator is connected to the oven cavity via steam pipes or other structures, and its operation is controlled by a controller. The steam generator typically includes a water storage device and a heating unit. The controller controls the heating unit to rapidly heat the water into steam, which is then introduced into the oven cavity via a solenoid valve or pump. The heating element is used to heat the air inside the oven cavity and is the core component for achieving the "baking" function. The heating element is located inside the oven cavity and is electrically connected to the controller; its operation is controlled by the controller. The heating element typically includes one or more sets of heating elements, such as upper and lower heating elements located at the top and bottom of the oven cavity, as well as a ring-shaped heating element and a fan for hot air circulation.

[0129] The temperature detection device is installed inside the furnace cavity, either on the inner wall or within a specific air duct, and is connected to the controller. The device detects and monitors the actual temperature within the furnace cavity as the furnace temperature, then sends the detected temperature signal (usually an electrical signal) to the controller as the basis for feedback control decisions. The type of temperature detection device is not limited; it can be a thermocouple or a thermistor, for example.

[0130] The condensate drain is located at the bottom of the oven cavity, which is the inner wall of the oven cavity, near the placement surface of the steam oven. The condensate drain is a container or recess specifically designed to collect and temporarily store liquids, specifically condensate produced during the steaming process. This condensate originates from the condensation of water droplets formed when the high-temperature steam entering the oven cavity encounters the relatively cooler food, inner walls, or grill rack, releasing its latent heat. These droplets naturally drip and collect in the condensate drain at the bottom of the oven cavity under gravity.

[0131] The water collection tank is detachably installed at the bottom of the oven cavity for easy removal and cleaning. The bottom of the oven cavity is the side of the inner wall closest to the placement surface of the steam oven. Taking a steam oven placed on a plane parallel to the ground as an example, the bottom of the oven cavity is the side of the inner wall closest to the ground. The inner wall of the oven cavity forms the physical boundary of the oven cavity space, and the bottom of the oven cavity is the lowest point of this physical space. Placing the water collection tank at the bottom of the oven cavity allows for better utilization of gravity to collect condensate.

[0132] The weight detection device is installed in the water collection tank, and the specific location can be determined based on the type of weight detection device.

[0133] For example, when the weight detection device is a liquid level sensor, the liquid level sensor is installed on the inner wall of the water collection tank and connected to the controller. The liquid level sensor can detect the water level in the water collection tank and send it to the controller. By analyzing the water level detected by the liquid level sensor, combined with the shape and size of the water collection tank, the controller can obtain the volume of condensate in the water collection tank. Furthermore, since the density of condensate is generally relatively stable, the weight of the condensate in the water collection tank can be calculated based on the volume and density of the condensate. It is understood that in other embodiments, the weight detection device may be of other types, which are not limited here.

[0134] The controller is the control center of the steam oven. It is electrically connected to the temperature detection device, steam generator, and heating element. The controller can receive signals from the temperature and weight detection devices, as well as other signals, such as user-input settings like function, temperature, and time via an interactive device. This interactive device can be a touchscreen, buttons, or voice control. The controller can also send control commands to the heating and steam generators, regulating their operation and adjusting the actual temperature and humidity within the oven cavity according to cooking requirements.

[0135] The aforementioned steam oven, during the temperature maintenance phase, uses its heating element to evaporate residual condensation in the oven cavity, reducing the amount of condensation. It also utilizes the steam from this secondary evaporation to heat the food, improving energy efficiency. This eliminates the need for manual cleaning of residual condensation, making it convenient to use. Furthermore, by controlling the heating element's operation based on the relationship between the weight of the condensation during the temperature maintenance phase and a preset weight threshold, the degree of evaporation can be adjusted. This avoids insufficient evaporation leading to excessive residual water, and also solves the problems of the oven cavity temperature exceeding the steaming mode temperature, the steaming mode turning into a baking mode, and the steamed food becoming dry and tough due to continued heating after the condensation has been evaporated. This improves cooking quality. Therefore, the overall reliability of the steam oven is significantly enhanced.

[0136] In one exemplary embodiment, the weight detection device includes a pressure sensor disposed on the side of the water collection tank away from the furnace cavity and connected to a controller.

[0137] When the weight detection device is a pressure sensor, the pressure sensor is located on the side of the water collection tank away from the furnace cavity, i.e., on the back of the water collection tank, and is connected to the controller. When there is water in the water collection tank, the pressure sensor can detect the pressure. The pressure detected by the pressure sensor varies depending on the amount of condensate in the water collection tank. Therefore, the controller can obtain the weight of the condensate in the water collection tank by analyzing the pressure data detected by the pressure sensor.

[0138] In this embodiment, the weight detection device includes a pressure sensor, which is located on the side of the water collection tank away from the furnace cavity and connected to the controller. The weight of the condensate in the water collection tank can be quickly obtained through the pressure signal detected by the pressure sensor, and the pressure sensor is easy to operate and has low operating costs.

[0139] In one exemplary embodiment, the heating device includes heating tubes disposed at the bottom of the furnace cavity, and the number of heating tubes is at least two.

[0140] The heating element located at the bottom of the furnace cavity can heat and evaporate the condensate in the water collection tank, which is also located at the bottom of the furnace cavity, thereby reducing the amount of condensate. The number of heating elements can be two, three, or other.

[0141] Furthermore, the arrangement of the heating elements is not limited. For example, when there are two heating elements, they can be arranged side-by-side or front-to-back. The two heating elements are physically separate and connected to the controller via their respective power supply lines and control switches. When there are three heating elements, they can be arranged in a triangular or linear layout. When there are four heating elements, they can be arranged in a matrix or a ring around the water collection tank to improve heating efficiency. Each individual heating element can be M-shaped, W-shaped, straight, or corrugated to increase the heating area.

[0142] When there are at least two heating elements, the controller can adjust the power of the heating device by adjusting the number of operating heating elements. For example, taking two heating elements as an example, when the weight of the condensate is greater than or equal to a first preset weight threshold and less than or equal to a second preset weight threshold, one heating element is controlled to operate, so that the heating device operates at a first power; when the weight of the condensate is greater than the second preset weight threshold, both heating elements are controlled to operate, so that the heating device operates at a second power, which is greater than the first power.

[0143] In this embodiment, the heating device includes heating elements located at the bottom of the oven cavity, with at least two heating elements. Multiple heating elements can cover a larger water collection area, reducing heating dead zones, resulting in more even heating of the condensate and faster evaporation, especially advantageous when dealing with large amounts of accumulated water. Independent control allows for fine-tuning of power. It eliminates the need to constantly start and stop the entire high-power heating element; simply activating a small power unit or combination is sufficient for handling small amounts of water, resulting in higher control precision and lower energy consumption. Redundancy design ensures that the system can continue operating with basic functions even if one heating element fails, providing a safety backup and improving the reliability of the steam oven.

[0144] To better understand the above embodiments, a detailed explanation is provided below with reference to a specific embodiment. In one embodiment, as follows... Figure 1 As shown, the steam oven includes: a controller 1 for controlling the operation of the entire machine; an oven cavity 2: the cooking cavity of the steam oven; a temperature detection device 3: located in the oven cavity 2 for real-time monitoring of the temperature data in the oven cavity 2; a water collection tank 4: located at the bottom of the oven cavity 2 for collecting residual condensate generated during the steaming mode; a pressure sensor: located on the back of the water collection tank for providing real-time pressure data; a steam generator 5 for introducing steam into the oven cavity 2; and a heating element 6 for evaporating the condensate collected in the water collection tank 4. The heating element 6 includes a heating tube located at the bottom of the oven cavity.

[0145] like Figure 9 As shown, the steam oven's steaming mode includes a heating stage and a temperature maintenance stage. Among them:

[0146] During the warming phase:

[0147] Since the temperature is low when the machine is first started, it would take a long time to heat the oven cavity 2 using only steam. Therefore, the bottom heating element is turned on for auxiliary heating during the heating phase, so that the temperature inside the oven cavity 2 can rise quickly to the required cooking temperature.

[0148] During the warming phase:

[0149] When the temperature detection device 3 detects that the oven cavity temperature t reaches T-2℃ (T is the set cooking target temperature, usually 100℃), the whole machine enters the temperature maintenance stage. During this stage:

[0150] Step A: Whether steam is introduced is controlled by the following temperature control logic:

[0151] ①When t < T - 2℃, steam is introduced;

[0152] ②When t≥T-2℃, stop introducing steam.

[0153] Step B: Whether the bottom heating element works and its operating power are controlled by the amount of residual condensate at the bottom of furnace cavity 2. Specifically: when the entire machine enters the temperature maintenance stage, the water collection tank 4 at the bottom of furnace cavity 2 collects condensate. The pressure sensor detects the weight m of the condensate and sends it back to controller 1, which then makes a judgment.

[0154] ①If m < 20g, then controller 1 will shut off the bottom heating element;

[0155] ②If 20≤m≤100g, then controller 1 controls the bottom heating element to turn on at half power;

[0156] ③If m>100g, then controller 1 will control the bottom heating element to turn on at full power.

[0157] The above control method can keep the temperature inside the oven cavity 2 near the set temperature. This solves the problem of excessive water accumulation at the bottom due to insufficient opening of the bottom heating element, and also solves the problem of the temperature inside the oven cavity 2 exceeding the normal steaming temperature when the bottom heating element continues to work after the water has evaporated during the second evaporation of the bottom water. This causes the "steaming mode" to change to "baking mode", making the steamed food dry and tough, which seriously affects the taste of the food.

[0158] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, artificial intelligence (AI) processors, etc., and are not limited to these.

[0159] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0160] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for controlling a steam oven, characterized in that, The method includes: The temperature inside the oven cavity of the steam oven is obtained; the oven cavity is a cooking cavity. When the oven cavity temperature reaches the target lower limit, the steam oven is controlled to enter the temperature maintenance stage; During the temperature maintenance stage, the weight of the condensate in the water collection tank of the steam oven is obtained; the water collection tank is located at the bottom of the oven cavity, and the bottom of the oven cavity is on the inner wall of the oven cavity, near the placement surface of the steam oven; Based on the relationship between the weight of the condensate and a preset weight threshold, the working state of the heating device of the steam oven is controlled; when the heating device is working, it evaporates the condensate in the water collection tank.

2. The method according to claim 1, characterized in that, The preset weight threshold includes a first preset weight threshold. The step of controlling the operating state of the heating element of the steam oven based on the relationship between the weight of the condensate and the preset weight threshold includes: If the weight of the condensate is less than the first preset weight threshold, the heating device is controlled to stop working; When the weight of the condensate is greater than or equal to the first preset weight threshold, the heating device is controlled to operate.

3. The method according to claim 2, characterized in that, The preset weight threshold further includes a second preset weight threshold, which is greater than the first preset weight threshold. Controlling the heating device to operate when the weight of the condensate is greater than or equal to the first preset weight threshold includes: When the weight of the condensate is greater than or equal to the first preset weight threshold and less than or equal to the second preset weight threshold, the heating device is controlled to operate at a first power. If the weight of the condensate is greater than the second preset weight threshold, the heating device is controlled to operate at a second power, which is greater than the first power.

4. The method according to claim 1, characterized in that, After the oven reaches the target lower temperature limit and the steam oven enters the temperature maintenance stage, the method further includes: Obtain the furnace cavity temperature during the temperature maintenance stage; When the oven cavity temperature during the temperature maintenance stage is lower than the target lower limit, the steam generator of the steam oven is controlled to operate; when the steam generator operates, it generates and introduces steam into the oven cavity. If the furnace temperature during the temperature maintenance phase is greater than or equal to the lower limit of the target lower temperature, the steam generator shall be controlled to stop operating.

5. The method according to claim 1, characterized in that, Before obtaining the oven cavity temperature of the steam oven, the method further includes: In response to the start command, the steam oven is controlled to enter the heating stage; During the heating phase, the steam generator of the steam oven is controlled to operate.

6. The method according to claim 5, characterized in that, During the heating phase, controlling the operation of the steam generator includes: During the heating phase, the steam generator is controlled to operate, and the heating device is also controlled to operate.

7. A control device for a steam oven, characterized in that, The device includes: A temperature acquisition module is used to acquire the temperature inside the oven cavity of the steam oven; the oven cavity is a cooking cavity. The temperature maintenance judgment module is used to control the steam oven to enter the temperature maintenance stage when the oven cavity temperature reaches the target lower limit value; The weight acquisition module is used to acquire the weight of the condensate in the water collection tank of the steam oven during the temperature maintenance stage; the water collection tank is located at the bottom of the oven cavity, and the bottom of the oven cavity is the side of the inner wall of the oven cavity near the placement surface of the steam oven; The heating control module is used to control the working state of the heating device of the steam oven based on the relationship between the weight of the condensate and a preset weight threshold; when the heating device is working, it evaporates the condensate in the water collection tank.

8. A steam oven, characterized in that, The oven includes a furnace cavity, a temperature detection device, a steam generator, a heating element, a weight detection device, and a controller. The temperature detection device and the heating element are both located inside the furnace cavity. A water collection tank is provided at the bottom of the furnace cavity, which is located on the inner wall of the furnace cavity, near the placement surface of the oven. The steam generator is connected to the furnace cavity, and the temperature detection device, the steam generator, the heating element, and the weight detection device are all connected to the controller. The temperature detection device is used to detect the furnace temperature in the furnace cavity and send it to the controller; the weight detection device is used to detect the weight of the condensate in the water collection tank and send it to the controller; the controller is used to execute the method according to any one of claims 1-6.

9. The steam oven according to claim 8, characterized in that, The weight detection device includes a pressure sensor, which is located on the side of the water collection tank away from the furnace cavity and connected to the controller.

10. The steam oven according to claim 8, characterized in that, The heating device includes heating tubes disposed at the bottom of the furnace cavity, and the number of heating tubes is at least two.

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