Humidity control method of steaming oven and steaming oven

Abstract

Disclosed are a humidity control method for a steaming oven and a steaming oven, the method comprising: acquiring a target temperature set by a user for a cavity of the steaming oven (S100), the cavity being used for accommodating food materials; obtaining a target relative humidity set by a user for the cavity; adjusting the humidity of the air in the cavity so that the relative humidity in the cavity reaches the reference relative humidity (S200), and controlling whether to introduce water vapor into the cavity according to the relationship between the target relative humidity and the reference relative humidity (S300); acquiring a humidity measurement value in the cavity, and obtaining a humidity measurement value variation caused by whether or not water vapor is introduced into the cavity after the relative humidity in the cavity reaches the reference relative humidity (S400); and comparing the humidity measurement value change amount with a change amount threshold value, and controlling introduction of water vapor into the cavity according to a comparison result (S500), the change amount threshold value being determined based on the target temperature and the target relative humidity, so that the humidity can be adjusted more accurately.

Description

A humidity control method for a steam oven and a steam oven Technical Field

[0001] The present invention relates to the technical field of cooking, and in particular to a humidity control method for a steam oven and a steam oven. Background Art

[0002] With the improvement of people's quality of life, steam ovens are more and more widely used in various public places and households. When cooking food in steam ovens, different foods and different processing processes have very different requirements for the humidity in the steam ovens. Therefore, how to more accurately obtain the humidity in the steam ovens is one of the problems to be solved or improved.

[0003] To address this issue, some cooking appliances, such as steam ovens, use absolute humidity sensors to measure humidity. A typical partial structure of an absolute humidity sensor is shown in Figure 1. It includes resistors R1, R2, and a comparator. Theoretically, the resistance of resistors R1 and R2 is identical. Resistor R1 is exposed to air, while resistor R2 is placed in a housing filled with an inert gas. When the humidity in the air changes, the resistance of resistor R1 changes, while the resistance of resistor R2 remains stable. The humidity measurement is obtained by measuring the difference in resistance between resistors R1 and R2.

[0004] While using an absolute humidity sensor can improve humidity measurement accuracy to a certain extent, absolute humidity sensors themselves are subject to at least the following errors: First, manufacturing error. The resistance values ​​of resistors R1 and R2 may not be exactly the same, affecting the absolute humidity sensor's accuracy. This error can also cause different absolute humidity sensors to produce different readings under the same humidity conditions. Second, measurement error. Airflow or evaporation can cause the resistance value of resistor R1 to vary under the same humidity conditions, leading to different readings from different absolute humidity sensors under the same humidity conditions. Furthermore, the same absolute humidity sensor can produce different readings under the same humidity conditions. In either case, accurate humidity measurement is compromised, affecting the desired cooking results.

[0005] Summary of the Invention

[0006] The main technical problem solved by the present invention is to provide a steam oven and a humidity control method for the steam oven, and the steam oven can measure the humidity more accurately.

[0007] To solve the above technical problems, an embodiment of the present application provides a humidity control method for a steam oven, comprising:

[0008] a target temperature acquisition step of acquiring a target temperature set by a user for a cavity of the steam oven, the cavity being used to accommodate food;

[0009] a target relative humidity obtaining step, obtaining the target relative humidity set by the user for the cavity;

[0010] a first humidity control step of introducing water vapor into the cavity until the relative humidity in the cavity reaches 100%, and then stopping introducing water vapor into the cavity;

[0011] a humidity change obtaining step of obtaining a humidity measurement value in the cavity, and obtaining a humidity measurement value change caused by not introducing water vapor into the cavity after the relative humidity in the cavity reaches 100%;

[0012] The second humidity control step is to compare the change in the humidity measurement value with a change threshold, and control the passage of water vapor into the cavity according to the comparison result, wherein the change threshold is determined based on the target temperature and the target relative humidity.

[0013] To solve the above technical problems, an embodiment of the present application provides a humidity control method for a steam oven, comprising:

[0014] a target temperature acquisition step of acquiring a target temperature set by a user for a cavity of the steam oven, the cavity being used to accommodate food;

[0015] a target relative humidity obtaining step, obtaining the target relative humidity set by the user for the cavity;

[0016] a first humidity control step of drying the air in the cavity so that the relative humidity in the cavity reaches approximately zero percent, and then introducing water vapor into the cavity;

[0017] a humidity change obtaining step of obtaining a humidity measurement value in the cavity, and obtaining a humidity measurement value change caused by introducing water vapor into the cavity after the relative humidity in the cavity reaches approximately zero percent;

[0018] The second humidity control step is to compare the change in the humidity measurement value with a change threshold, and control the passage of water vapor into the cavity according to the comparison result, wherein the change threshold is determined based on the target temperature and the target relative humidity.

[0019] To solve the above technical problems, an embodiment of the present application provides a humidity control method for a steam oven, comprising:

[0020] a target temperature acquisition step of acquiring a target temperature set by a user for a cavity of the steam oven, the cavity being used to accommodate food;

[0021] a target relative humidity obtaining step, obtaining the target relative humidity set by the user for the cavity;

[0022] a first humidity control step of adjusting the humidity of the air in the cavity so that the relative humidity in the cavity reaches a reference relative humidity, and then controlling whether to introduce water vapor into the cavity based on a relationship between the target relative humidity and the reference relative humidity;

[0023] a humidity change acquisition step of acquiring a humidity measurement value in the cavity, and obtaining a humidity measurement value change caused by whether water vapor is introduced into the cavity after the relative humidity in the cavity reaches a reference relative humidity;

[0024] The second humidity control step is to compare the change in the humidity measurement value with a change threshold, and control the passage of water vapor into the cavity according to the comparison result, wherein the change threshold is determined based on the target temperature and the target relative humidity.

[0025] To solve the above technical problems, an embodiment of the present application provides a steam oven, comprising:

[0026] A box body having a cavity for accommodating food and an opening connecting the outside world and the cavity;

[0027] A door, which is used to open and close the opening;

[0028] a steam generating device for generating water vapor for passing into the cavity;

[0029] a heating device, the heating device being used to increase the temperature in the cavity;

[0030] a temperature detection device, the temperature detection device being used to obtain a temperature measurement value within the cavity;

[0031] an absolute humidity sensor, the absolute humidity sensor being located in the cavity and configured to obtain a humidity measurement value in the cavity;

[0032] A control device for performing the following steps:

[0033] a target temperature obtaining step, obtaining a target temperature set by a user for the cavity;

[0034] a target relative humidity obtaining step, obtaining the target relative humidity set by the user for the cavity;

[0035] a first humidity control step of controlling the steam generating device to supply water vapor to the cavity so that after the relative humidity in the cavity reaches 100%, controlling the steam generating device to stop supplying water vapor to the cavity;

[0036] a humidity change obtaining step of obtaining a humidity measurement value in the cavity, and obtaining a humidity measurement value change caused by controlling the steam generating device not to supply water vapor into the cavity after the relative humidity in the cavity reaches 100%;

[0037] The second humidity control step is to compare the change in the humidity measurement value with a change threshold, and control the passage of water vapor into the cavity according to the comparison result, wherein the change threshold is determined based on the target temperature and the target relative humidity.

[0038] To solve the above technical problems, an embodiment of the present application provides a steam oven, comprising:

[0039] A box body having a cavity for accommodating food and an opening connecting the outside world and the cavity;

[0040] A door, which is used to open and close the opening;

[0041] a steam generating device for generating water vapor for passing into the cavity;

[0042] a heating device, the heating device being used to increase the temperature in the cavity;

[0043] a temperature detection device, the temperature detection device being used to obtain a temperature measurement value within the cavity;

[0044] an absolute humidity sensor, the absolute humidity sensor being located in the cavity and configured to obtain a humidity measurement value in the cavity;

[0045] A control device for performing the following steps:

[0046] a target temperature obtaining step, obtaining a target temperature set by a user for the cavity;

[0047] a target relative humidity obtaining step, obtaining the target relative humidity set by the user for the cavity;

[0048] a first humidity control step of drying the air in the cavity so that the relative humidity in the cavity reaches approximately zero percent, and then controlling the steam generating device to introduce water vapor into the cavity;

[0049] a humidity change obtaining step of obtaining a humidity measurement value in the cavity, and obtaining a humidity measurement value change caused by controlling the steam generating device to introduce water vapor into the cavity after the relative humidity in the cavity reaches approximately zero percent;

[0050] The second humidity control step is to compare the change in the humidity measurement value with a change threshold, and control the passage of water vapor into the cavity according to the comparison result, wherein the change threshold is determined based on the target temperature and the target relative humidity.

[0051] To solve the above technical problems, an embodiment of the present application provides a steam oven, comprising:

[0052] A box body having a cavity for accommodating food and an opening connecting the outside world and the cavity;

[0053] A door, which is used to open and close the opening;

[0054] a steam generating device for generating water vapor for passing into the cavity;

[0055] a heating device, the heating device being used to increase the temperature in the cavity;

[0056] a temperature detection device, the temperature detection device being used to obtain a temperature measurement value within the cavity;

[0057] an absolute humidity sensor, the absolute humidity sensor being located in the cavity and configured to obtain a humidity measurement value in the cavity;

[0058] A control device for performing the following steps:

[0059] a target temperature obtaining step, obtaining a target temperature set by a user for the cavity;

[0060] a target relative humidity obtaining step, obtaining the target relative humidity set by the user for the cavity;

[0061] a first humidity control step of adjusting the humidity of the air in the cavity so that the relative humidity in the cavity reaches a reference relative humidity, and then controlling whether the steam generating device introduces water vapor into the cavity based on a relationship between the target relative humidity and the reference relative humidity;

[0062] a humidity change obtaining step of obtaining a humidity measurement value in the cavity, and obtaining a humidity measurement value change caused by controlling whether the steam generating device supplies water vapor to the cavity after the relative humidity in the cavity reaches a reference relative humidity;

[0063] The second humidity control step is to compare the change in the humidity measurement value with a change threshold, and control the passage of water vapor into the cavity according to the comparison result, wherein the change threshold is determined based on the target temperature and the target relative humidity.

[0064] In order to solve the above technical problems, an embodiment of the present application provides a computer-readable storage medium, on which a program is stored. The program can be executed by a processor to implement the above method.

[0065] According to the humidity control method for the steam oven in the above embodiment, a reference relative humidity is pre-set, and then whether the cavity of the steam oven has reached the set target relative humidity is determined based on the change in the humidity measurement value obtained by the absolute humidity sensor from the reference relative humidity. Among them, if the same absolute humidity sensor has experienced the same change in humidity measurement value at the reference relative humidity, it means that the current environment has reached the same relative humidity. This is irrelevant to the reading of the absolute humidity sensor at the reference relative humidity. Therefore, the error of the absolute humidity sensor itself can be eliminated, and the accuracy of the humidity measurement of the absolute humidity sensor can be improved to obtain the expected cooking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] FIG1 is a schematic structural diagram of an absolute humidity sensor according to an embodiment;

[0067] FIG2 is a schematic diagram of the structure of a steam oven according to an embodiment;

[0068] FIG3 is a block diagram of a steam oven according to an embodiment;

[0069] FIG4 is a schematic structural diagram of a steam oven according to an embodiment;

[0070] FIG5 is an enlarged schematic diagram of point A in FIG4 ;

[0071] FIG6 is a schematic structural diagram of a steam oven with a portion of the rear side wall hidden according to an embodiment;

[0072] FIG7 is a front structural schematic diagram of a steam oven according to an embodiment;

[0073] FIG8 is a flow chart of a humidity control method for a steam oven according to an embodiment;

[0074] 100, box body;

[0075] 110, cavity; 120, access opening;

[0076] 111. Steam outlet; 112. Gas circulation chamber; 113. Ventilation outlet; 114. Air inlet; 115. Fan; 116. Raised portion; 117. Air guide port;

[0077] 200, box door;

[0078] 300. Steam generating device;

[0079] 400, heating device;

[0080] 410, heating tube;

[0081] 500. Temperature detection device;

[0082] 510, temperature sensor;

[0083] 600, absolute humidity sensor;

[0084] 610, sensing end;

[0085] 700. Refrigeration equipment;

[0086] 800, thermal protection module;

[0087] 900. Control device. DETAILED DESCRIPTION

[0088] The present invention will be further described in detail below by means of specific embodiments in conjunction with the accompanying drawings. Similar elements in different embodiments are numbered with associated similar elements. In the following embodiments, many detailed descriptions are provided to enable the present application to be better understood. However, those skilled in the art will readily appreciate that some of the features may be omitted in different circumstances, or may be replaced by other elements, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification. This is to avoid the core portion of the present application being overwhelmed by excessive descriptions, and for those skilled in the art, it is not necessary to describe these related operations in detail. They will fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0089] In addition, the features, operations, or characteristics described in the specification may be combined in any appropriate manner to form various embodiments. Furthermore, the steps or actions in the method description may be reordered or adjusted in a manner readily apparent to those skilled in the art. Therefore, the various sequences in the specification and drawings are provided solely for the purpose of clearly describing a particular embodiment and are not intended to be mandatory, unless otherwise specified.

[0090] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings).

[0091] The semiconductor refrigeration chips referred to herein are based on the Peltier effect, enabling cooling or heating. This cooling or heating principle is that when an electric current passes through two connected conductors, a temperature difference is generated at the junction, resulting in heat absorption and heat release at the junction. This effect was discovered by the Frenchman Jean-Charles Peltier in 1834. The amount of heat absorbed and released in the Peltier effect is determined by the magnitude of the current. Based on the Peltier effect, cooling and heating elements, such as Peltier cooling and heating chips, have been developed. When current is applied to a Peltier cooling and heating chip, one side absorbs heat (cooling) and the other side releases heat (heating). The heat absorption and heat release surfaces can be altered by changing the direction of the current.

[0092] The standard humidity measuring instrument referred to in this article refers to a professional instrument that can accurately measure relative humidity.

[0093] The relative humidity referred to in this article refers to the percentage of the actual water vapor content in the air (absolute humidity) to the saturated humidity (maximum possible water vapor content) at the same temperature.

[0094] The relative humidity of 100% mentioned in this article refers to saturated humidity, that is, the amount of water vapor reaches the limit of the air's ability to accommodate water vapor.

[0095] The term "relative humidity approximately zero percent" as used herein refers to the air being virtually free of water vapor. Since achieving a relative humidity of zero percent is difficult in practice, a relative humidity of approximately zero percent will generally meet the requirement. The meaning of "approximately" is well-defined by those skilled in the art. In some cases, a relative humidity of one percent may be considered to be approximately zero percent, while in other cases, a relative humidity of three percent may be considered to be approximately zero percent. In other words, those skilled in the art can define "approximately zero percent" as needed.

[0096] Please refer to Figures 2 to 7. The embodiments shown in Figures 2 to 7 provide a steam oven, which includes a cabinet 100, a cabinet door 200, a steam generating device 300, a heating device 400, a temperature detecting device 500, an absolute humidity sensor 600 and a control device 900.

[0097] The box body 100 has a cavity 110 for accommodating food and an access opening 120 connecting the outside world with the cavity 110. In this article, the side where the access opening 120 is located is called the front side, and the other side opposite to it is called the back side. Users can take in and put in food or tools such as baking trays through the access opening 120.

[0098] The door 200 is movably connected to the box body 100. Specifically, it can be rotatably connected by a hinge or other means for translation. The door 200 has an open state and a closed state. When the door 200 is open, the access opening 120 is opened, and when the door 200 is closed, the access opening 120 is closed.

[0099] The steam generating device 300 is used to introduce water vapor into the cavity 110 through a steam port 111 provided in the cavity 110. Exemplarily, the steam generating device 300 includes a water tank, a water tank heater, a gas collection assembly, and necessary ventilation piping. The water tank is used to hold water, the water tank heater is used to heat the water in the water tank to convert it into water vapor, the gas collection assembly is used to collect the water vapor, and the ventilation piping is used to direct the water vapor collected by the gas collection assembly into the cavity 110 through the steam port 111.

[0100] The heating device 400 is used to increase the temperature within the cavity 110, thereby achieving the baking function of the steam oven. The heating device 400 may include one or more heating tubes 410 located within the cavity 110, which heat the cavity 110 by emitting thermal radiation. In some embodiments, when multiple heating tubes 410 are included, the multiple heating tubes 410 are distributed along the top and side walls of the cavity 110 to heat the food from multiple angles and in all directions. In other embodiments, the multiple heating tubes 410 may also be distributed at other locations within the cavity 110.

[0101] The temperature detection device 500 is used to obtain a temperature measurement value in the cavity 110. The temperature detection device 500 may include one or more temperature sensors 510 located in the cavity 110 to obtain a temperature measurement value in the cavity 110.

[0102] As shown in FIG. 4 , the absolute humidity sensor 600 is located in the cavity 110 . The absolute humidity sensor 600 is used to obtain a humidity measurement value in the cavity 110 .

[0103] Generally speaking, as shown in FIG5 , the absolute humidity sensor 600 includes a sensing end 610 for sensing humidity to obtain a humidity measurement value. In some embodiments, not all of the portion of the absolute humidity sensor 600 exposed to the air is used for sensing humidity. In some embodiments, the position between the absolute humidity sensor 600 and the steam outlet 111 is cleverly designed. Specifically, the end face of the sensing end 610 is located outside the area directly facing the air outlet direction of the steam outlet 111. In some embodiments, if the end face of the sensing end 610 is projected along its own axis, the projected position will not be within the steam outlet 111. In other words, the steam outlet 111 does not directly blow against the end face of the sensing end 610 when air is discharged. By preventing the airflow containing water vapor from directly blowing against the end face of the sensing end 610, the possibility of malfunction of the sensing end 610 of the absolute humidity sensor 600 is reduced, thereby improving its reliability.

[0104] It should be noted that the concept of the airflow containing water vapor not directly blowing toward the end surface of the sensing terminal 610 is different from the concept of the airflow containing water vapor not directly blowing toward the absolute humidity sensor 600. The airflow containing water vapor can directly blow toward the non-sensing surface of the absolute humidity sensor 600. In this embodiment, the airflow direction of the steam outlet 111 can be directly toward the side of the absolute humidity sensor 600 (the end surface of the sensing terminal 610 is the top surface).

[0105] In some embodiments, the absolute humidity sensor 600 and the steam vent 111 are both located on the rear wall of the cavity 110 , and the sensing end 610 of the absolute humidity sensor 600 faces the access opening 120 to avoid being directly blown by the airflow containing water vapor.

[0106] As shown in FIG6 , the rear side wall may further include a hollow gas circulation chamber 112. The gas circulation chamber 112 includes a ventilation port 113 connected to the cavity 110 and an air inlet connected to the steam generating device 300. The steam port 111 is connected to the steam generating device 300 through the gas circulation chamber 112. In other words, the water vapor generated by the steam generating device 300 first enters the gas circulation chamber 112 through the air inlet 114 and then enters the cavity 110 through the steam port 111. A fan 115 is also provided in the gas circulation chamber 112. The fan 115 is shown within the dotted box in FIG6 . A heating pipe 410 is also provided around the outside of the dotted box. In other embodiments, the heating pipe 410 may be configured in other shapes near the fan 115. The heating pipe 410 can heat the food from the rear side of the cavity 110. When the fan 115 is working, it draws the gas in the cavity 110 into the gas circulation chamber 112 through the ventilation port 113, and discharges the gas in the gas circulation chamber 112 into the cavity 110 through the steam port 111. Through the operation of the fan 115, the water vapor discharged from the steam port 111 into the cavity 110 includes both the water vapor newly entering from the air inlet 114 and the water vapor circulating in the cavity 110, thereby improving the utilization efficiency of the water vapor.

[0107] In some scenarios, the fan 115 is relatively large, and the space for the gas circulation chamber 112 to accommodate the fan 115 also needs to protrude. Providing a large gas circulation chamber 112 may cause the rear side wall to protrude toward the outside of the box 100, increasing the space occupied by the box 100 and affecting the aesthetics. Therefore, in some embodiments, as shown in Figures 4 and 7, the rear side wall has a raised portion 116 that protrudes toward the cavity 110. The gas circulation chamber 112 is located within the raised portion 116, and the ventilation port 113 is opened on the top wall of the raised portion 116. By providing the raised portion 116, the rear side wall can have a larger gas circulation chamber 112 when the box 100 is of the same size.

[0108] When a portion of the rear sidewall forms a protrusion 116 , multiple steam ports 111 can be opened along the circumference of the protrusion 116 , so that water vapor can diffuse around the protrusion 116 to form a good gas flow circulation in the cavity 110 . In addition, the air inlet 114 is located on one side of the fan 115, and the absolute humidity sensor 600 is located on the other side of the fan 115. For the convenience of description, the side where the air inlet 114 is located is defined as the first side, and the side where the absolute humidity sensor 600 is located is defined as the second side of the fan 115. Since water vapor enters the gas circulation chamber 112 from the air inlet 114, more new water vapor will accumulate on the first side relative to the second side. The water vapor discharged from the steam port 111 on the first side into the cavity 110 will be more than the water vapor discharged from the steam port 111 on the second side into the cavity 110. By arranging the air inlet and the absolute humidity sensor 600 on both sides of the fan 115, the airflow flowing to the absolute humidity sensor 600 can be reduced under the same conditions. In addition to the side wall of the protrusion 116, the steam port 111 can also be arranged on the top wall of the protrusion 116.

[0109] In some embodiments, as shown in FIG2 , the steam oven further includes a refrigeration device 700 and a thermal protection module 800. The refrigeration device 700 is used to reduce the temperature within the cavity 110. The thermal protection module 800 is disposed between the cavity 110 and the refrigeration device 700 to isolate heat transfer from the cavity 110 to the refrigeration device 700. For example, the refrigeration device 700 may employ semiconductor refrigeration technology, i.e., the refrigeration device 700 includes semiconductor cooling fins. Two air guide ports 117 communicating with the refrigeration device 700 are disposed on the sidewalls of the cavity 110. When the refrigeration device 700 is operating, gas within the cavity 110 is drawn into the refrigeration device 700 from one of the air guide ports 117 and cooled by the semiconductor cooling fins. The cooled gas then reenters the interior of the cavity 110 from the other air guide port 117, thereby reducing the temperature within the cavity 110.

[0110] When the steam oven further includes a refrigeration device 700 and a thermal protection module 800, similar to the absolute humidity sensor 600, the refrigeration device 700 and the thermal protection module 800 are both located on the second side of the fan 115, thereby reducing the high-temperature airflow containing water vapor blowing toward the refrigeration device 700 and the thermal protection module 800, thereby avoiding damage to the refrigeration device 700 and the thermal protection module 800.

[0111] In some embodiments, when the temperature detection device 500 includes at least two temperature sensors 510, at least one of the temperature sensors 510 in the temperature detection device 500 is positioned adjacent to the absolute humidity sensor 600 to cooperate with the absolute humidity sensor 600 to obtain temperature and humidity measurement values ​​for the same area within the cavity 110. For example, multiple temperature sensors 510 may be distributed vertically within the cavity 110, with the absolute humidity sensor 600 positioned adjacent to one of the temperature sensors 510. When the heating device 400 includes multiple heating tubes 410 distributed on the top and side walls of the cavity 110, the area near the top wall generally heats up faster. Therefore, the absolute humidity sensor 600 is positioned adjacent to the lowest temperature sensor 510, away from high-temperature areas, to reduce the probability of failure of the absolute humidity sensor 600.

[0112] The control device 900 is used to control various devices, components, etc. in the steam oven based on external input operations and / or data obtained by the steam oven. For example, the heating device 400 and / or the refrigeration device 700 can be controlled according to the temperature measurement value. In addition, the steam generating device 300 can also be controlled according to the humidity measurement value.

[0113] Based on the steam oven in any of the above embodiments, the present application further provides a humidity control method, which includes a target temperature acquisition step, a target relative humidity acquisition step, a first humidity control step, a humidity change acquisition step, and a second humidity control step. In which:

[0114] The purpose of the target temperature acquisition step is to determine how many degrees Celsius the user wants to set the cavity 110 to. The target temperature may be different for different ingredients or different cooking methods.

[0115] The purpose of the target relative humidity acquisition step is to determine the relative humidity that the user wants to achieve in the cavity 110. Since the maximum amount of water vapor that air can hold is different at different temperatures, the absolute humidity may be different at different temperatures even if the relative humidity is the same.

[0116] The purpose of the first humidity control step is to adjust the relative humidity in the cavity 110 to a reference relative humidity. The meaning of the reference relative humidity and the specific adjustment method are described below.

[0117] The purpose of the humidity change acquisition step is to acquire the humidity measurement value change after the relative humidity is adjusted to the reference relative humidity.

[0118] The purpose of the second humidity control step is to determine whether to take measures to readjust the relative humidity and how to readjust the relative humidity based on the change in the humidity measurement value.

[0119] Referring to the embodiment shown in FIG8 , a humidity control method is provided in this embodiment, comprising the steps of:

[0120] Step S100: Obtain the target temperature set by the user for the oven cavity 110. The user can set the target temperature directly through the panel or knob of the oven, or the user can set the target temperature remotely through a remote controller or other means.

[0121] In this embodiment, after obtaining the target temperature, the steam oven will determine whether to heat or cool the cavity 110 based on the relationship between the detected temperature measurement value and the target temperature. For example, if the current temperature in the cavity 110 is 30°C and the target temperature is 50°C, the cavity 110 will be heated to reach the target temperature. As explained above, even if the relative humidity is the same at different temperatures, the absolute humidity may be different. In this embodiment, the difference between the temperature measurement value and the target temperature is obtained, and the difference is compared with a pre-set difference threshold. When the difference is less than the difference threshold, step S200 is executed. In other words, humidity control is only started when the actual temperature in the cavity 110 is stable near the target temperature.

[0122] Step S200 : adjusting the humidity of the air in the cavity 110 so that the relative humidity in the cavity 110 reaches a reference relative humidity.

[0123] The reference relative humidity may be any value between approximately 0% and 100%, preferably 100% or approximately 0%. These two values ​​are mainly used as examples for description below.

[0124] When the baseline relative humidity is 100%, the air in cavity 110 is adjusted to a supersaturated state where it cannot contain any more water vapor. The relative humidity can be brought to 100% by introducing an excess amount of water vapor. For example, water vapor can be introduced into cavity 110 for a preset time, which should be sufficient to allow cavity 110 to reach a supersaturated state. For example, for a cavity 110 of known capacity, if continuous introduction of water vapor for at least m seconds can achieve a supersaturated state, then m seconds is the minimum value of the preset time. Alternatively, a preset amount of water vapor can be introduced into cavity 110, which is sufficient to achieve a supersaturated state. For example, for a cavity 110 of known capacity, if introduction of n milliliters of water vapor can achieve a supersaturated state, then n milliliters is the minimum value of the preset amount. After the relative humidity in cavity 110 reaches 100%, the introduction of water vapor is temporarily stopped.

[0125] The baseline relative humidity is approximately zero percent, that is, the air in the cavity 110 is adjusted to an undersaturated state with almost no water vapor. The air in the cavity 110 can be dried to make the relative humidity reach approximately zero percent. In some embodiments, when the indoor air itself is relatively dry, the cavity 110 can reach an undersaturated state after standing for a period of time at the target temperature. In other embodiments, the air in the cavity 110 is heated within a preset time and / or at a predetermined heating power to dry the air. It should be noted that the heating and drying of the air should not cause an excessive deviation between the actual temperature in the cavity 110 and the target temperature. The air drying process is stopped after the relative humidity in the cavity 110 reaches approximately zero percent.

[0126] The reference relative humidity can also be other values. If the reference relative humidity is lower than the relative humidity in the current cavity 110, the relative humidity in the current cavity 110 is made to reach the reference relative humidity through drying treatment, and then the drying treatment is temporarily stopped; if the reference relative humidity is higher than the relative humidity in the current cavity 110, the relative humidity in the current cavity 110 can be made to reach the reference relative humidity by introducing water vapor, and then the introduction of water vapor is temporarily stopped.

[0127] In some embodiments, the reference relative humidity of other values ​​may be determined in the following manner:

[0128] If the readings of an absolute humidity sensor 600 at the same temperature and relative humidity are roughly the same, that relative humidity can be used as the baseline relative humidity for that absolute humidity sensor 600 at that temperature. For example, if the reading of an absolute humidity sensor 600 at 100°C and a relative humidity of 40% fluctuates around a, then 40% can be used as the baseline relative humidity for that absolute humidity sensor 600 at 100°C. When the target temperature is 100°C, if the current reading of the absolute humidity sensor 600 is less than a, water vapor is introduced into the cavity 110 until the reading approaches or equals a. If the current reading of the absolute humidity sensor 600 is greater than a, the air in the cavity 110 is dried until the reading approaches or equals a.

[0129] Step S300 : Controlling whether to introduce water vapor into the cavity 110 according to the relationship between the target relative humidity and the reference relative humidity.

[0130] This step is to change the relative humidity within cavity 110 from the baseline relative humidity to the target relative humidity. When the target relative humidity is greater than the baseline relative humidity, water vapor is introduced into cavity 110, causing the relative humidity within cavity 110 to rise. When the target relative humidity is less than or equal to the baseline relative humidity, water vapor is not introduced into cavity 110, causing the relative humidity within cavity 110 to decrease over time.

[0131] It is easy to understand that when the reference relative humidity is 100%, the target relative humidity is generally lower than the reference relative humidity. That is, when the reference relative humidity is 100%, after the relative humidity in the cavity 110 reaches the reference relative humidity, water vapor is not introduced into the cavity 110, so that the relative humidity in the cavity 110 approaches the target relative humidity from the reference relative humidity. When the reference relative humidity is approximately 0%, the target relative humidity is generally higher than the reference relative humidity. That is, when the reference relative humidity is approximately 0%, water vapor is introduced into the cavity 110, so that the relative humidity in the cavity 110 approaches the target relative humidity from the reference relative humidity.

[0132] Step S400 : Obtaining a change in the humidity measurement value caused by whether water vapor is introduced into the cavity 110 .

[0133] In step S300, regardless of whether water vapor is introduced into the cavity 110 or not, the relative humidity in the cavity 110 will change from the reference relative humidity. During the change, the reading of the absolute humidity sensor 600 will change, and the change in the reading is the change in the humidity measurement value.

[0134] In some embodiments, when the baseline relative humidity is 100%, the first humidity measurement value obtained when the relative humidity in the cavity 110 reaches 100% is first recorded, and then the second humidity measurement value that changes with time after no water vapor is introduced into the cavity 110 is obtained. Based on the first humidity measurement value and the second humidity measurement value, the change in the humidity measurement value is obtained.

[0135] In some embodiments, when the baseline relative humidity is approximately zero percent, a first humidity measurement value obtained when the relative humidity in the cavity 110 reaches approximately zero percent is first recorded, and then a second humidity measurement value that changes with time after water vapor is introduced into the cavity 110 is obtained. Based on the first humidity measurement value and the second humidity measurement value, the change in the humidity measurement value can be obtained.

[0136] When the reference relative humidity is other values, the method for obtaining the change in the humidity measurement value is similar to the above, and will not be described in detail here.

[0137] Step S500 : comparing the humidity measurement value change with the change threshold, and controlling the flow of water vapor into the cavity 110 according to the comparison result.

[0138] The change threshold is determined based on the target temperature and target relative humidity. That is, the change threshold is related to two factors: the target temperature and the target relative humidity. In some embodiments, after obtaining the target temperature and target relative humidity, obtaining the change threshold requires obtaining a pre-set relationship table corresponding to the target temperature. The relationship table includes the change in humidity measurement values ​​that occurs when the relative humidity changes from a baseline relative humidity to N percent at the corresponding target temperature. A relationship table corresponding to each temperature that the user allows to adjust can be pre-stored. For example, if a steam oven allows the user to set the target temperature to any integer between 30°C and 100°C, each integer pair between 30°C and 100°C will have a corresponding relationship table. The following uses T°C as an example to illustrate how to obtain the relationship table corresponding to T°C.

[0139] First, place the absolute humidity sensor 600 used on the steam oven and the standard humidity measuring instrument in an environment with the same relative humidity at T°C. Adjust the relative humidity in the environment until the standard humidity measuring instrument indicates that the relative humidity reaches the reference relative humidity. Record the reading of the absolute humidity sensor 600 at this time as X. Next, adjust the relative humidity in the environment until the standard humidity measuring instrument indicates that the relative humidity reaches N percent. Record the reading of the absolute humidity sensor 600 at this time as Y. Based on the above steps, the change Z in the humidity measurement value that occurs when the relative humidity changes from the reference relative humidity to N percent at T°C can be obtained, Z = |XY|, and then a relationship table corresponding to T°C can be obtained.

[0140] By introducing the humidity measurement value variation, the error of the absolute humidity sensor 600 itself can be effectively eliminated without adding additional structures. For example, at T ° C, the reference relative humidity is 100%. In the relationship table of an absolute humidity sensor 600, the variation threshold for adjusting the relative humidity from 100% to 80% is 600 kg / m 3 , then as long as the current relative humidity is 100%, no matter what the humidity measurement value (reading) of the absolute humidity sensor 600 is, as long as the reading when the relative humidity is 100% decreases by 600kg / m 3 , which means that the relative humidity has reached 80%, thereby eliminating the measurement error of the absolute humidity sensor 600 as much as possible and obtaining a more accurate measurement result.

[0141] When the change in the humidity measurement value is caused by not introducing water vapor into the cavity 110, if the change in the humidity measurement value is less than the change threshold, water vapor is not introduced into the cavity 110. If the change in the humidity measurement value reaches the change threshold, the above steps S200, S300 and S400 are repeated.

[0142] For example, the baseline relative humidity is 100%, the target relative humidity is 80%, and the change threshold is 600 kg / m 3 When the relative humidity in the cavity 110 reaches 100%, water vapor is no longer introduced into the cavity 110. The change in the humidity measurement value is caused by not introducing water vapor into the cavity 110. When the change in the humidity measurement value does not reach 600 kg / m 3 When the water vapor is not introduced, the relative humidity continues to decrease. When the change in humidity measurement value reaches 600kg / m 3 , indicating that the target relative humidity has been reached, water vapor is introduced again until it reaches a supersaturated state and then the introduction of water vapor is stopped. When the change in the humidity measurement value reaches the change threshold again, the above steps S200, S300 and S400 are repeated.

[0143] When the change in the humidity measurement value is caused by the introduction of water vapor into the cavity 110, if the change in the humidity measurement value is less than the change threshold, continue to introduce water vapor into the cavity 110, and if the change in the humidity measurement value reaches the change threshold, repeat the above steps S200, S300 and S400.

[0144] For example, the baseline relative humidity is approximately 0%, the target relative humidity is 20%, and the change threshold is 400 kg / m 3 After the relative humidity in the cavity 110 reaches approximately zero percent, water vapor is introduced into the cavity 110. The change in the humidity measurement value is caused by the introduction of water vapor into the cavity 110. When the change in the humidity measurement value does not reach 400 kg / m 3 When water vapor is continuously introduced, the relative humidity continues to rise. When the change in humidity measurement value reaches 400 kg / m 3 , indicating that the target relative humidity has been reached, the drying process is started again at this time, and then the drying process is stopped after reaching the undersaturated state. When the change in the humidity measurement value reaches the change threshold again, the above steps S200, S300 and S400 are repeatedly executed.

[0145] As can be seen from the above description, after the relative humidity in cavity 110 reaches the target relative humidity, this embodiment does not stop subsequent operations, but instead continuously repeats the process from the baseline relative humidity to the target relative humidity. This is because the inventors have discovered that in the field of steam ovens, it is very difficult to stabilize the relative humidity in cavity 110 at a constant value. This uncontrollable state is not conducive to cooking food. By repeating the process from the baseline relative humidity to the target relative humidity, it is possible to ensure that the relative humidity reaches the target relative humidity every time, thereby improving the cooking effect of the food.

[0146] In addition, when the target temperature or target relative humidity is reset, the change threshold is also determined based on the reset target temperature or target relative humidity, and the above steps S200, S300, and S400 are executed again based on the reset change threshold. For example, the base relative humidity is 100%, the target relative humidity is 80%, and the target temperature is 100°C. The change threshold determined based on the target temperature and target relative humidity is 600 kg / m 3 If the user changes the target relative humidity from 80% to 90% during the process of relative humidity decreasing after reaching the baseline relative humidity, water vapor is introduced again to make the cavity 110 reach an oversaturated state, and a new change threshold is determined based on the new target relative humidity and target temperature.

[0147] The inventors also found in practice that not all relative humidities are utilized in the cooking of ingredients, but there are commonly used relative humidities. In some embodiments, multiple preset humidity levels are provided, and each humidity level has a corresponding relative humidity. The user's selection of the humidity level is received, and the relative humidity corresponding to the humidity level selected by the user is set as the target relative humidity. For example, the humidity level can be 20%, 40%, 60%, and 80%. By setting the humidity level, on the one hand, the user's operation is simplified, and on the other hand, the amount of data in the relationship table can be reduced.

[0148] The steam oven and humidity control method in the above-mentioned embodiment reduce or eliminate the measurement error of the absolute humidity sensor itself, so as to better control the relative humidity in the cavity and obtain the expected cooking effect. In addition, the reliability of the absolute humidity sensor in use is improved through various designs.

[0149] This document is described with reference to various exemplary embodiments. However, those skilled in the art will recognize that changes and modifications may be made to the exemplary embodiments without departing from the scope of this document. For example, the various operational steps and components used to perform the operational steps may be implemented in different ways (e.g., one or more steps may be deleted, modified, or incorporated into other steps) depending on the specific application or considering any number of cost functions associated with the operation of the system.

[0150] Additionally, as will be appreciated by those skilled in the art, the principles of this disclosure may be embodied in a computer program product on a computer-readable storage medium pre-loaded with computer-readable program code. Any tangible, non-transitory computer-readable storage medium may be used, including magnetic storage devices (hard disks, floppy disks, etc.), optical storage devices (CD-ROMs, DVDs, Blu-ray discs, etc.), flash memory, and / or the like. These computer program instructions may be loaded onto a general-purpose computer, a special-purpose computer, or other programmable data processing device to form a machine, such that the instructions executed on the computer or other programmable data processing device can generate a device that implements a specified function. These computer program instructions may also be stored in a computer-readable memory, which can instruct the computer or other programmable data processing device to operate in a specific manner, such that the instructions stored in the computer-readable memory can form an article of manufacture that includes an implementation device that implements the specified function. The computer program instructions may also be loaded onto a computer or other programmable data processing device, causing the computer or other programmable device to execute a series of operational steps to produce a computer-implemented process, such that the instructions executed on the computer or other programmable device provide the steps for implementing the specified function.

[0151] Although the principles of this invention have been shown in various embodiments, many modifications of structure, arrangement, proportion, elements, materials and components that are particularly suitable for specific environments and operational requirements can be used without departing from the principles and scope of this invention. The above modifications and other changes or amendments are intended to be included within the scope of this invention.

[0152] The foregoing detailed description has been described with reference to various embodiments. However, those skilled in the art will recognize that various modifications and changes can be made without departing from the scope of this disclosure. Therefore, the present disclosure will be considered in an illustrative rather than a restrictive sense, and all such modifications will be included within its scope. Similarly, the advantages, other advantages and solutions to the problems of the various embodiments have been described above. However, the benefits, advantages, solutions to the problems and any elements that can produce these, or make them more specific, should not be interpreted as critical, required or necessary. The term "comprising" and any other variants used in this article are all non-exclusive inclusions, so that a process, method, article or device that includes a list of elements includes not only these elements, but also other elements that are not explicitly listed or do not belong to the process, method, system, article or device. In addition, the term "coupled" and any other variants used in this article refer to physical connections, electrical connections, magnetic connections, optical connections, communication connections, functional connections and / or any other connections.

[0153] Those skilled in the art will recognize that many changes can be made to the details of the above embodiments without departing from the basic principles of the invention. Therefore, the scope of the invention should be determined from the following claims.

Claims

1. A method for controlling humidity in a steam oven, characterized in that: include: a target temperature acquisition step of acquiring a target temperature set by a user for a cavity of the steam oven, the cavity being used to accommodate food; a target relative humidity obtaining step, obtaining the target relative humidity set by the user for the cavity; a first humidity control step of introducing water vapor into the cavity until the relative humidity in the cavity reaches 100%, and then stopping introducing water vapor into the cavity; a humidity change obtaining step of obtaining a humidity measurement value in the cavity, and obtaining a humidity measurement value change caused by not introducing water vapor into the cavity after the relative humidity in the cavity reaches 100%; The second humidity control step is to compare the change in the humidity measurement value with a change threshold, and control the passage of water vapor into the cavity according to the comparison result, wherein the change threshold is determined based on the target temperature and the target relative humidity.

2. The method according to claim 1, wherein The controlling the introduction of water vapor into the cavity according to the comparison result includes: When the change in the humidity measurement value reaches the change threshold, performing the first humidity control step, the humidity change acquisition step, and the second humidity control step again; When the change in the humidity measurement value is less than the change threshold, water vapor is not introduced into the cavity.

3. The method according to claim 1 or 2, wherein: The step of introducing water vapor into the cavity so that the relative humidity in the cavity reaches 100% and then not introducing water vapor into the cavity comprises: After water vapor is introduced into the cavity within a preset time, and / or after a preset amount of water vapor is introduced into the cavity, water vapor is no longer introduced into the cavity.

4. The method according to any one of claims 1 to 3, characterized in that The obtaining of the humidity measurement value in the cavity to obtain a change in the humidity measurement value caused by not introducing water vapor into the cavity after the relative humidity in the cavity reaches 100% includes: Recording a first humidity measurement value obtained when the relative humidity in the cavity reaches 100 percent; obtaining a second humidity measurement value that changes with time when no water vapor is introduced into the cavity; The humidity measurement value change is obtained based on the first humidity measurement value and the second humidity measurement value.

5. The method according to any one of claims 1 to 4, characterized in that The change threshold is determined based on the target temperature and the target relative humidity, including: Acquire a corresponding preset first relationship table according to the target temperature, wherein the first relationship table includes a humidity measurement value change that occurs when the relative humidity changes from 100% to N% at the corresponding target temperature; The change threshold value of the relative humidity from 100% to the target relative humidity is obtained according to the target relative humidity and the first relationship table.

6. A method for controlling humidity in a steam oven, characterized in that: include: a target temperature acquisition step of acquiring a target temperature set by a user for a cavity of the steam oven, the cavity being used to accommodate food; a target relative humidity obtaining step, obtaining the target relative humidity set by the user for the cavity; a first humidity control step of drying the air in the cavity so that the relative humidity in the cavity reaches approximately zero percent, and then introducing water vapor into the cavity; a humidity change obtaining step of obtaining a humidity measurement value in the cavity, and obtaining a humidity measurement value change caused by introducing water vapor into the cavity after the relative humidity in the cavity reaches approximately zero percent; The second humidity control step is to compare the change in the humidity measurement value with a change threshold, and control the passage of water vapor into the cavity according to the comparison result, wherein the change threshold is determined based on the target temperature and the target relative humidity.

7. The method according to claim 6, wherein The controlling the introduction of water vapor into the cavity according to the comparison result includes: When the change in the humidity measurement value reaches the change threshold, stopping the introduction of water vapor into the cavity, and performing the first humidity control step, the humidity change acquisition step, and the second humidity control step again; When the change in the humidity measurement value is less than the change threshold, water vapor continues to be introduced into the cavity.

8. The method according to claim 6 or 7, wherein: The drying process of the air in the cavity includes: The air in the cavity is heated and dried within a preset time and / or with a predetermined heating power.

9. The method according to any one of claims 6 to 8, characterized in that The obtaining of the humidity measurement value in the cavity to obtain a change in the humidity measurement value caused by introducing water vapor into the cavity after the relative humidity in the cavity reaches approximately zero percent includes: recording a first humidity measurement value obtained when the relative humidity in the cavity reaches approximately zero percent; obtaining a second humidity measurement value that changes over time after water vapor is introduced into the cavity; The humidity measurement value change is obtained based on the first humidity measurement value and the second humidity measurement value.

10. The method according to any one of claims 6 to 9, characterized in that The change threshold is determined based on the target temperature and the target relative humidity, including: Obtaining a corresponding preset second relationship table according to the target temperature, the second relationship table including a humidity measurement value change that occurs when the relative humidity changes from approximately 100 percent to N percent at the corresponding target temperature; The change threshold value for the relative humidity to change from approximately zero percent to the target relative humidity is determined based on the target relative humidity and the second relationship table.

11. A method for controlling humidity in a steam oven, characterized in that: include: a target temperature acquisition step of acquiring a target temperature set by a user for a cavity of the steam oven, the cavity being used to accommodate food; a target relative humidity obtaining step, obtaining the target relative humidity set by the user for the cavity; a first humidity control step of adjusting the humidity of the air in the cavity so that the relative humidity in the cavity reaches a reference relative humidity, and then controlling whether to introduce water vapor into the cavity based on a relationship between the target relative humidity and the reference relative humidity; a humidity change acquisition step of acquiring a humidity measurement value in the cavity, and obtaining a humidity measurement value change caused by whether water vapor is introduced into the cavity after the relative humidity in the cavity reaches a reference relative humidity; The second humidity control step is to compare the change in the humidity measurement value with a change threshold, and control the passage of water vapor into the cavity according to the comparison result, wherein the change threshold is determined based on the target temperature and the target relative humidity.

12. The method according to claim 11, wherein The step of adjusting the humidity of the air in the cavity so that the relative humidity in the cavity reaches a reference relative humidity includes: Drying the air in the cavity so that the relative humidity in the cavity reaches a reference relative humidity; or The air in the cavity is humidified so that the relative humidity in the cavity reaches a reference relative humidity.

13. The method according to claim 12, wherein: The drying process of the air in the cavity includes: heating and drying the air in the cavity within a preset time and / or with a predetermined heating power; The humidifying process for the air in the cavity includes: introducing water vapor into the cavity within a preset time, and / or introducing a preset amount of water vapor into the cavity.

14. The method according to claim 11, wherein The controlling whether to introduce water vapor into the cavity according to the relationship between the target relative humidity and the reference relative humidity includes: When the target relative humidity is greater than the reference relative humidity, introducing water vapor into the cavity; When the target relative humidity is less than or equal to the reference relative humidity, water vapor is not introduced into the cavity.

15. The method according to claim 11, wherein When the change in the humidity measurement value is caused by not introducing water vapor into the cavity, controlling the introduction of water vapor into the cavity according to the comparison result includes: When the change in the humidity measurement value reaches the change threshold, performing the first humidity control step, the humidity change acquisition step, and the second humidity control step again; When the change in the humidity measurement value is less than the change threshold, water vapor is not introduced into the cavity.

16. The method according to claim 11, wherein When the change in the humidity measurement value is caused by the introduction of water vapor into the cavity, controlling the introduction of water vapor into the cavity according to the comparison result includes: When the change in the humidity measurement value reaches the change threshold, stopping the introduction of water vapor into the cavity, and performing the first humidity control step, the humidity change acquisition step, and the second humidity control step again; When the change in the humidity measurement value is less than the change threshold, water vapor continues to be introduced into the cavity.

17. The method according to claim 11, wherein The obtaining of the humidity measurement value in the cavity and obtaining a change in the humidity measurement value caused by whether water vapor is introduced into the cavity after the relative humidity in the cavity reaches a reference relative humidity include: Recording a first humidity measurement value obtained when the relative humidity in the cavity reaches the reference relative humidity; Obtain a second humidity measurement value that changes with time after the relative humidity in the cavity reaches the reference relative humidity; The humidity measurement value change is obtained based on the first humidity measurement value and the second humidity measurement value.

18. The method according to claim 15, wherein The change threshold is determined based on the target temperature and the target relative humidity, including: Obtaining a corresponding preset relationship table according to the target temperature, wherein the relationship table includes a humidity measurement value change that occurs when the relative humidity changes from a reference relative humidity to N percent at the corresponding target temperature; The threshold value of the change in relative humidity from the reference relative humidity to the target relative humidity is determined according to the target relative humidity and the relationship table.

19. The method according to claim 1, 6 or 11, wherein: The method further comprises: Monitor the target relative humidity set by the user. When the target relative humidity is reset, redetermine the change threshold value based on the target temperature value and the reset target relative humidity. Execute the first humidity control step, the humidity change acquisition step, and the second humidity control step again based on the redetermined change threshold value.

20. The method of claim 1, 6 or 11, wherein: After the target temperature acquisition step, the method further includes: Obtain a temperature measurement value in the cavity, obtain a difference between the temperature measurement value and the target temperature, compare the difference with a preset difference threshold, and when the difference is less than the difference threshold, execute the first humidity control step; otherwise, do not execute the first humidity control step.

21. The method of claim 1, 6 or 11, wherein: The obtaining of the user's setting of the target relative humidity in the cavity includes: Providing a plurality of preset humidity levels, each of the humidity levels having a corresponding relative humidity; A user selection of the humidity level is received, and the relative humidity corresponding to the humidity level selected by the user is set as the target relative humidity.

22. A steam oven, characterized in that: include: A box body having a cavity for accommodating food and an opening connecting the outside world and the cavity; A door, which is used to open and close the opening; a steam generating device for generating water vapor for passing into the cavity; a heating device, the heating device being used to increase the temperature in the cavity; a temperature detection device, the temperature detection device being used to obtain a temperature measurement value within the cavity; an absolute humidity sensor, the absolute humidity sensor being located in the cavity and configured to obtain a humidity measurement value in the cavity; A control device for performing the following steps: a target temperature obtaining step, obtaining a target temperature set by a user for the cavity; a target relative humidity obtaining step, obtaining the target relative humidity set by the user for the cavity; a first humidity control step of controlling the steam generating device to supply water vapor to the cavity so that after the relative humidity in the cavity reaches 100%, controlling the steam generating device to stop supplying water vapor to the cavity; a humidity change obtaining step of obtaining a humidity measurement value in the cavity, and obtaining a humidity measurement value change caused by controlling the steam generating device not to supply water vapor into the cavity after the relative humidity in the cavity reaches 100%; The second humidity control step is to compare the change in the humidity measurement value with a change threshold, and control the passage of water vapor into the cavity according to the comparison result, wherein the change threshold is determined based on the target temperature and the target relative humidity.

23. The steam oven according to claim 22, wherein: The controlling the introduction of water vapor into the cavity according to the comparison result includes: When the change in the humidity measurement value reaches the change threshold, performing the first humidity control step, the humidity change acquisition step, and the second humidity control step again; When the change in the humidity measurement value is less than the change threshold, water vapor is not introduced into the cavity.

24. A steam oven, characterized in that: include: A box body having a cavity for accommodating food and an opening connecting the outside world and the cavity; A door, which is used to open and close the opening; a steam generating device for generating water vapor for passing into the cavity; a heating device, the heating device being used to increase the temperature in the cavity; a temperature detection device, the temperature detection device being used to obtain a temperature measurement value within the cavity; an absolute humidity sensor, the absolute humidity sensor being located in the cavity and configured to obtain a humidity measurement value in the cavity; A control device for performing the following steps: a target temperature obtaining step, obtaining a target temperature set by a user for the cavity; a target relative humidity obtaining step, obtaining the target relative humidity set by the user for the cavity; a first humidity control step of drying the air in the cavity so that the relative humidity in the cavity reaches approximately zero percent, and then controlling the steam generating device to introduce water vapor into the cavity; a humidity change obtaining step of obtaining a humidity measurement value in the cavity, and obtaining a humidity measurement value change caused by controlling the steam generating device to introduce water vapor into the cavity after the relative humidity in the cavity reaches approximately zero percent; The second humidity control step is to compare the change in the humidity measurement value with a change threshold, and control the passage of water vapor into the cavity according to the comparison result, wherein the change threshold is determined based on the target temperature and the target relative humidity.

25. The steam oven according to claim 24, wherein: The controlling the introduction of water vapor into the cavity according to the comparison result includes: When the change in the humidity measurement value reaches the change threshold, stopping the introduction of water vapor into the cavity, and performing the first humidity control step, the humidity change acquisition step, and the second humidity control step again; When the change in the humidity measurement value is less than the change threshold, water vapor continues to be introduced into the cavity.

26. A steam oven, characterized in that: include: A box body having a cavity for accommodating food and an opening connecting the outside world and the cavity; A door, which is used to open and close the opening; a steam generating device for generating water vapor for passing into the cavity; a heating device, the heating device being used to increase the temperature in the cavity; a temperature detection device, the temperature detection device being used to obtain a temperature measurement value within the cavity; an absolute humidity sensor, the absolute humidity sensor being located in the cavity and configured to obtain a humidity measurement value in the cavity; A control device for performing the following steps: a target temperature obtaining step, obtaining a target temperature set by a user for the cavity; a target relative humidity obtaining step, obtaining the target relative humidity set by the user for the cavity; a first humidity control step of adjusting the humidity of the air in the cavity so that the relative humidity in the cavity reaches a reference relative humidity, and then controlling whether the steam generating device introduces water vapor into the cavity based on a relationship between the target relative humidity and the reference relative humidity; a humidity change obtaining step of obtaining a humidity measurement value in the cavity, and obtaining a humidity measurement value change caused by controlling whether the steam generating device supplies water vapor to the cavity after the relative humidity in the cavity reaches a reference relative humidity; The second humidity control step is to compare the change in the humidity measurement value with a change threshold, and control the passage of water vapor into the cavity according to the comparison result, wherein the change threshold is determined based on the target temperature and the target relative humidity.

27. The steam oven according to claim 26, wherein: When the change in the humidity measurement value is caused by not introducing water vapor into the cavity, controlling the introduction of water vapor into the cavity according to the comparison result includes: When the change in the humidity measurement value reaches the change threshold, performing the first humidity control step, the humidity change acquisition step, and the second humidity control step again; When the change in the humidity measurement value is less than the change threshold, water vapor is not introduced into the cavity.

28. The steam oven according to claim 26, wherein: When the change in the humidity measurement value is caused by the introduction of water vapor into the cavity, controlling the introduction of water vapor into the cavity according to the comparison result includes: When the change in the humidity measurement value reaches the change threshold, stopping the introduction of water vapor into the cavity, and performing the first humidity control step, the humidity change acquisition step, and the second humidity control step again; When the change in the humidity measurement value is less than the change threshold, water vapor continues to be introduced into the cavity.

29. A computer-readable storage medium, characterized in that The medium stores a program, which can be executed by a processor to implement the method according to any one of claims 1 to 21.

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