An oven and a control method thereof

Abstract

The embodiment of the application provides a kind of oven and its control method, it is related to oven technical field, for improving the detection accuracy of lower cost humidity sensor.The oven includes: inner container, heating cavity with opening;Humidity sensor, it is arranged in the heating cavity, the humidity sensor is used to detect the voltage value for reflecting the humidity in the heating cavity;Controller is configured to: obtain the voltage value detected by the humidity sensor;According to the voltage value, determine voltage variation parameter;The voltage variation parameter is used to characterize that the voltage value and the oxygen concentration are positively correlated or negatively correlated;According to the voltage value and the voltage variation parameter, determine the oxygen concentration in the air in the heating cavity;According to the oxygen concentration, determine the humidity in the heating cavity.

Description

Technical Field

[0001] This application relates to the field of oven technology, and more particularly to an oven and its control method. Background Technology

[0002] Humidity has a significant impact on the cooking results when cooking food in an oven.

[0003] Currently, many ovens are equipped with humidity sensors to monitor the humidity inside the oven cavity. However, these low-cost humidity sensors typically cannot directly measure absolute or relative humidity, resulting in low accuracy in the humidity readings.

[0004] Therefore, improving the detection accuracy of low-cost humidity sensors has become an urgent technical problem to be solved. Summary of the Invention

[0005] This application provides an oven and a control method thereof for improving the detection accuracy of a low-cost humidity sensor.

[0006] To achieve the above objectives, this application adopts the following technical solution.

[0007] In a first aspect, embodiments of this application provide an oven, which includes: an inner cavity and a heating chamber with an opening;

[0008] A humidity sensor is installed inside the heating chamber to detect a voltage value that reflects the humidity inside the heating chamber. The controller is configured to: acquire the voltage value detected by the humidity sensor; determine a voltage change parameter based on the voltage value; the voltage change parameter is used to characterize whether there is a positive or negative correlation between the voltage value and the oxygen concentration; determine the oxygen concentration in the air inside the heating chamber based on the voltage value and the voltage change parameter; and determine the humidity inside the heating chamber based on the oxygen concentration.

[0009] The technical solution provided in this application offers at least the following advantages: This application provides an oven that can determine the oxygen concentration in the air inside the heating cavity by using the voltage value detected by a humidity sensor and a voltage change parameter that characterizes the positive or negative correlation between the voltage value and oxygen concentration. Furthermore, the humidity inside the heating cavity can be determined based on the oxygen concentration. Since humidity and oxygen concentration interact in the enclosed environment of an oven, determining humidity through oxygen concentration provides a more comprehensive understanding of the environmental conditions inside the oven. This approach not only considers the potential influence of oxygen concentration on the humidity sensor but also utilizes oxygen concentration as a correction parameter, improving the accuracy of humidity detection and thus providing more reliable humidity data for the oven.

[0010] In some embodiments, the controller is configured to determine the oxygen concentration in the air inside the heating chamber based on a voltage value and a voltage change parameter, including: acquiring the temperature inside the heating chamber; determining a temperature correction factor based on the temperature; and determining the oxygen concentration in the air inside the heating chamber based on the temperature correction factor, the voltage value, and the voltage change parameter.

[0011] In some embodiments, the controller is configured to determine the oxygen concentration in the air inside the heating chamber based on the voltage value and voltage change parameters, including: determining the oxygen concentration based on the correspondence between the voltage value, the voltage change parameters, and the oxygen concentration, and the voltage value.

[0012] In some embodiments, the correspondence between voltage values, voltage change parameters, and oxygen concentration is obtained based on a fitting algorithm.

[0013] In some embodiments, the voltage value is obtained periodically based on a preset period, and the voltage value includes the voltage value of two adjacent periods; the controller is configured to determine a voltage change parameter based on the voltage value, including: determining the voltage change parameter based on the change between the voltage values ​​of two adjacent periods; the voltage change parameter is used to characterize whether there is a positive or negative correlation between the voltage value and the oxygen concentration.

[0014] In some embodiments, the controller is configured to determine a voltage change parameter based on the change between a first voltage value and a second voltage value, including: when the change between voltage values ​​in two adjacent cycles is an increase in voltage value, determining a parameter that characterizes a positive correlation between voltage value and oxygen concentration as a voltage change parameter; and when the change between voltage values ​​in two adjacent cycles is a decrease in voltage value, determining a parameter that characterizes a negative correlation between voltage value and oxygen concentration as a voltage change parameter.

[0015] Secondly, embodiments of this application provide a control method for an oven. The method is applied to an oven and includes: acquiring a voltage value detected by a humidity sensor; determining a voltage change parameter based on the voltage value; the voltage change parameter being used to characterize whether there is a positive or negative correlation between the voltage value and the oxygen concentration; determining the oxygen concentration in the air inside the heating cavity based on the voltage value and the voltage change parameter; and determining the humidity inside the heating cavity based on the oxygen concentration.

[0016] Thirdly, embodiments of this application provide a controller, including: one or more processors; one or more memories; wherein the one or more memories are used to store computer program code, the computer program code including computer instructions, and when the one or more processors execute the computer instructions, the controller executes any of the oven control methods provided in the second aspect.

[0017] Fourthly, embodiments of this application provide a computer-readable storage medium including computer instructions that, when executed on a computer, cause the computer to perform any of the oven control methods provided in the second aspect.

[0018] Fifthly, embodiments of this application provide a computer program product that can be directly loaded into a memory and contains software code. After being loaded and executed by a computer, the computer program product can implement any of the oven control methods provided in the second aspect.

[0019] It should be noted that the aforementioned computer instructions may be stored, in whole or in part, on a computer-readable storage medium. This computer-readable storage medium may be packaged together with the controller's processor, or it may be packaged separately from the controller's processor; this application does not impose any limitations on this.

[0020] The beneficial effects described in aspects two through five of this application can be referred to the analysis of the beneficial effects of aspect one, and will not be repeated here. Attached Figure Description

[0021] The accompanying drawings are used to provide a further understanding of the technical solutions of this application and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions of this application.

[0022] Figure 1 This is a schematic diagram of the structure of an oven provided in an embodiment of this application;

[0023] Figure 2 A hardware configuration block diagram of an oven provided in an embodiment of this application;

[0024] Figure 3 A hardware configuration block diagram of another oven provided in an embodiment of this application;

[0025] Figure 4 A hardware configuration block diagram of another oven provided in an embodiment of this application;

[0026] Figure 5 A hardware configuration block diagram of another oven provided in an embodiment of this application;

[0027] Figure 6 A hardware configuration block diagram of another oven provided in an embodiment of this application;

[0028] Figure 7 A hardware configuration block diagram of another oven provided in an embodiment of this application;

[0029] Figure 8 A flowchart illustrating an oven control method provided in this application embodiment;

[0030] Figure 9 This application provides a schematic diagram illustrating the correspondence between voltage values ​​and oxygen concentration.

[0031] Figure 10 A flowchart illustrating another oven control method provided in this application embodiment;

[0032] Figure 11 A flowchart illustrating another oven control method provided in this application embodiment;

[0033] Figure 12 A schematic diagram illustrating the correspondence between voltage values ​​and oxygen concentration at different temperatures, provided for embodiments of this application;

[0034] Figure 13 A flowchart illustrating another oven control method provided in this application embodiment;

[0035] Figure 14 A flowchart of another oven control method provided in an embodiment of this application. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0038] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0039] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, when describing pipelines, the terms "connected" and "linked" as used in this application have the meaning of establishing electrical connection. The specific meaning needs to be understood in conjunction with the context.

[0040] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0041] Currently, there are two main types of humidity sensors commonly used in ovens. One type can directly detect the absolute or relative humidity inside the oven, but this type of humidity sensor is more expensive at higher temperatures.

[0042] Another method involves indirectly inferring humidity by detecting changes in humidity patterns. These humidity sensors are relatively inexpensive, but their accuracy is often difficult to guarantee. For example, lower-cost humidity sensors typically use resistive or capacitive humidity-sensitive elements. The resistance or capacitance of these elements changes with humidity. By measuring the resistance or capacitance of these elements and converting it into a digital signal, the current humidity value can be obtained. However, due to the use of simpler materials and manufacturing techniques, these low-cost humidity sensors are often limited by material and design constraints, resulting in lower detection accuracy and failing to meet the requirements of high-precision applications.

[0043] Therefore, improving the detection accuracy of low-cost humidity sensors has become an urgent technical problem to be solved.

[0044] Based on this, embodiments of this application provide a control method for an oven. This method determines the oxygen concentration in the air within the heating cavity by using the voltage value detected by a humidity sensor and a voltage change parameter that characterizes the positive or negative correlation between the voltage value and oxygen concentration. Furthermore, the humidity within the heating cavity is determined based on the oxygen concentration. Since humidity and oxygen concentration interact within the enclosed environment of an oven, determining humidity through oxygen concentration provides a more comprehensive understanding of the oven's environmental conditions. This approach not only considers the potential influence of oxygen concentration on the humidity sensor but also utilizes oxygen concentration as a correction parameter, improving the accuracy of humidity detection and thus providing more reliable humidity data for the oven.

[0045] In this embodiment, the oven is a cooking device with baking or steam heating functions. For example, the oven can be an electric oven, an integrated stove with oven functions, etc., and is not limited thereto.

[0046] Figure 1 This is a schematic diagram of the structure of an oven provided according to an exemplary embodiment of this application. Figure 1 As shown, the oven 100 may include a housing 101. The housing 101 may be as follows: Figure 1 The shape shown is approximately cuboid, but it can also be other shapes. The outer shell 101 has a top cover plate on the top side, side cover plates on both sides, an oven door 103 connected to the front side, and a rear cover plate connected to the rear side.

[0047] In some embodiments, the oven 100 may include an inner cavity 102. The inner cavity 102 is disposed within the outer shell 101, and a heating cavity with an opening is formed inside the inner cavity 102, in which food that needs to be processed using the oven 100 can be placed.

[0048] In some embodiments, the oven 100 may include an oven door 103. The oven door 103 is hinged to the outer casing 101 via a door hinge assembly. When cooking is required, the inner cavity 102 is opened using the oven door 103, and the food to be cooked is placed into the inner cavity 102 through the loading / unloading opening of the steaming / baking chamber. Then, the inner cavity 102 is closed using the oven door 103, and the power is turned on for cooking. After cooking is complete, the food is removed, thus completing the cooking process.

[0049] In some embodiments, such as Figure 2 As shown, the oven 100 may include a heating device 201. The heating device 201 is used to heat food placed inside the heating cavity. In some embodiments, the heating device 201 may be a heating tube disposed on the inner cavity 102 for heating food placed inside the heating cavity. The heating tube may include an upper heating tube and a lower heating tube. The upper heating tube is mounted on the upper end face of the inner cavity 102, and the lower heating tube is mounted on the lower end face of the inner cavity 102.

[0050] In some embodiments, the heating element can be straight or other shapes, and can be a high-power infrared heating element, carbon fiber heating element, graphene heating element, high-power resistance tube, etc. The heating element can quickly heat the surrounding air, and when working continuously, it can provide high-power heat to the food in the center of the oven through thermal radiation and thermal conduction.

[0051] In some embodiments, the oven may include a reflector 202. The reflector 202 is disposed around the heating element to ensure that the light waves radiated by the heating element are radiated onto the food surface at a certain angle.

[0052] In some embodiments, the upper heating tube and the lower heating tube may include multiple sets of heating tubes, each set of heating tubes having a fixed reflector.

[0053] In some embodiments, the oven 100 may include a controller 203. The controller 203 is a device that can generate operation control signals based on instruction opcodes and timing signals to instruct the oven 100 to execute control instructions. Exemplarily, the controller 203 may be a central processing unit (CPU), a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. The controller 203 may also be other devices with processing functions, such as circuits, devices, or software modules; this application embodiment does not impose any limitations on this.

[0054] Because the temperature inside the heating cavity of the oven is high after heating food at 100 degrees Celsius, the hot air needs to be expelled promptly. Therefore, if... Figure 3 As shown, oven 100 may include a cooling fan 301.

[0055] In some embodiments, oven 100 may include a heat dissipation duct.

[0056] When heat dissipation is required in the heating chamber, the cooling fan 301 guides the hot air in the heating chamber into the cooling duct, and then exhausts the hot air out of the oven 100.

[0057] Figure 4 This is a hardware configuration block diagram of an oven provided according to an exemplary embodiment of this application. For example... Figure 4 As shown, the oven 100 may include an operation panel 401. The operation panel 401 has function buttons. For example, the function buttons may include a power button, a mode selection button, a temperature selection button, a + (increase) button, a - (decrease) button, etc. The user can interact with the oven 100 through the operation panel 401 to control the operation of the oven 100.

[0058] In some embodiments, oven 100 may include a voice device 402. The voice device 402 is used to issue voice prompts.

[0059] In some embodiments, the oven 100 may include a power supply 403. Under the control of the controller 203, the power supply 403 provides power to the oven 100 from an external power source. The power supply 403 may include a built-in power circuit installed inside the oven 100, or it may be an external power source installed in the oven 100, providing an external power interface within the oven 100.

[0060] In addition, the controller 203 is electrically connected to the power supply 403, the heating device 201, the operation panel 401 and the voice device 402, and is used to control the operation of the various components electrically connected thereto, so as to realize the various predetermined functions of the oven 100.

[0061] In some embodiments, such as Figure 5 As shown, the oven 100 may include a humidity sensor 501. The humidity sensor 501 is disposed inside the heating cavity and is used to detect a voltage value that reflects the humidity inside the heating cavity.

[0062] In some embodiments, such as Figure 5 As shown, the oven 100 may include a temperature sensor 502. The temperature sensor is disposed inside the heating cavity and is used to detect the temperature inside the heating cavity.

[0063] In some embodiments, such as Figure 5 As shown, the oven 100 may include a humidification device 503. The humidification device 503 is used to humidify the heating cavity to increase the humidity inside the heating cavity.

[0064] In some embodiments, the controller 203 may be electrically connected to the humidity sensor 501, the temperature sensor 502, and the humidification device 503. Thus, the controller 203 can determine the humidity inside the heating chamber based on the voltage value detected by the humidity sensor. If the humidity inside the heating chamber is low, the controller 203 can control the humidification device 503 to humidify the heating chamber, thereby increasing the humidity inside the heating chamber and maintaining it within a suitable range.

[0065] In some embodiments, such as Figure 6 As shown, the oven 100 may include a dehumidification device 601. The dehumidification device 601 is used to dehumidify the heating cavity, thereby reducing the humidity inside the heating cavity.

[0066] In some embodiments, the controller 203 can be electrically connected to the dehumidifier 601. When the humidity in the heating chamber is high, the controller 203 can control the dehumidifier 601 to remove moisture from the heating chamber, thereby reducing the humidity in the heating chamber and maintaining the humidity in the heating chamber within a suitable range.

[0067] In some embodiments, when the humidity inside the heating cavity is high, the controller 203 can also control the oven door 103 to open, thereby reducing the humidity inside the heating cavity and maintaining it within a suitable range. In this case, the oven 100 may not need to include a dehumidifier 601, thus saving costs.

[0068] In some implementations, controller 203 can be used to acquire the voltage value detected by the humidity sensor of controller 203; determine the voltage change parameter based on the voltage value of controller 203; the voltage change parameter of controller 203 is used to characterize whether there is a positive or negative correlation between the voltage value of controller 203 and the oxygen concentration of controller 203; determine the oxygen concentration in the air inside the heating chamber of controller 203 based on the voltage value of controller 203 and the voltage change parameter of controller 203; and determine the humidity inside the heating chamber of controller 203 based on the oxygen concentration of controller 203.

[0069] In some embodiments, the controller 203 can be used to acquire the temperature inside the heating chamber of the controller 203; determine a temperature correction coefficient based on the temperature of the controller 203; and determine the oxygen concentration in the air inside the heating chamber of the controller 203 based on the temperature correction coefficient of the controller 203, the voltage value of the controller 203, and the voltage change parameters of the controller 203.

[0070] In some embodiments, the controller 203 can be used to determine the oxygen concentration of the controller 203 based on the controller 203 voltage value, the controller 203 voltage change parameters, the correspondence between the controller 203 voltage value, the controller 203 oxygen concentration, and the controller 203 voltage value.

[0071] In some embodiments, the controller 203 can be used to determine the voltage change parameter of the controller 203 based on the change between the voltage values ​​of two adjacent cycles of the controller 203; the voltage change parameter of the controller 203 is used to characterize whether there is a positive or negative correlation between the voltage value of the controller 203 and the oxygen concentration of the controller 203.

[0072] In some embodiments, the controller 203 can be used to determine the parameter that characterizes the positive correlation between the voltage value of the controller 203 and the oxygen concentration of the controller 203 as the voltage change parameter when the voltage value changes between two adjacent cycles of the controller 203 increases; and to determine the parameter that characterizes the negative correlation between the voltage value of the controller 203 and the oxygen concentration of the controller 203 as the voltage change parameter when the voltage value changes between two adjacent cycles of the controller 203 decreases.

[0073] In some embodiments, such as Figure 7As shown, the oven 100 may include a memory 701. The memory 701 can be used to store software programs and data. The controller 203 executes various functions of the oven 100 and performs data processing by running the software programs or data stored in the memory 701. The memory 701 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device. The memory 701 stores an operating system that enables the oven 100 to operate. In this application, the memory 701 may store the operating system and various applications, and may also store code that executes the oven control method provided in the embodiments of this application.

[0074] In some embodiments, such as Figure 7 As shown, oven 100 may include a communicator 702. The communicator 702 is used to establish communication connections with other network entities, such as establishing communication connections with terminal devices. The communicator 702 may include a radio frequency (RF) module, a cellular module, a wireless fidelity (WIFI) module, and a GPS module, etc. Taking an RF module as an example, the RF module can be used for signal reception and transmission; specifically, it sends received information to controller 203 for processing; additionally, it transmits signals generated by controller 203. Typically, the RF circuit may include, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low-noise amplifier (LNA), a duplexer, etc.

[0075] It is understood that the structures illustrated in the embodiments of this application do not constitute a specific limitation on the oven. In other embodiments of this application, the oven may include more or fewer components than illustrated, or combine some components, or separate some components, or have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0076] like Figure 8 As shown in the figure, this application provides a method for controlling an oven, which includes the following steps:

[0077] S101, The controller acquires the voltage value detected by the humidity sensor.

[0078] In some embodiments, during the cooking process in the oven, the controller can detect the voltage value through a humidity sensor to further determine the humidity inside the heating cavity through the following steps, thereby better controlling the cooking of food in the oven based on the humidity inside the heating cavity.

[0079] In one example, the controller can acquire the voltage value detected by the humidity sensor when food is placed in the oven and cooking begins, in order to determine the initial humidity inside the heating chamber. The dehumidified humidity can then serve as a reference benchmark for humidity changes during subsequent cooking.

[0080] In another example, the controller can periodically acquire voltage values ​​detected by a humidity sensor during the cooking process in the oven, according to a preset cycle, to monitor humidity changes within the heating chamber in real time. This real-time monitoring helps the controller adjust cooking parameters, such as temperature, cooking time, or ventilation, based on humidity variations.

[0081] In another example, the controller can operate at specific cooking stages, such as fermentation, baking, or roasting. Humidity is a critical parameter at these stages. Therefore, the controller needs to frequently acquire voltage values ​​detected by the humidity sensor to ensure the food is cooked under suitable humidity conditions.

[0082] In another example, the controller can acquire the voltage value detected by the humidity sensor during the cooking process in the oven based on the smart recipe, and adjust the cooking parameters according to the humidity value to achieve the cooking effect expected by the smart recipe.

[0083] In another example, since different types of food have different humidity requirements, the controller can adjust the frequency and method of acquiring humidity values ​​according to the type of food placed in the oven.

[0084] For example, bread and cakes require a certain level of humidity during baking to aid in the fermentation and expansion of the dough or batter, while ensuring a soft and moist texture in the finished product. Therefore, when baking bread and cakes, the controller can be set to acquire humidity values ​​at a high frequency. Through frequent detection, the controller can promptly identify changes in humidity and adjust cooking parameters, such as temperature, ventilation, or humidification, as needed to ensure stable humidity during the baking process.

[0085] For example, grilling meat requires a relatively dry environment to allow a crispy crust to form on the surface while maintaining a tender interior. Therefore, the frequency of acquiring voltage values ​​detected by the humidity sensor can be reduced to ensure that humidity control is not overly interfered with during cooking, allowing the meat to cook naturally in a relatively dry environment.

[0086] S102. The controller determines the voltage change parameters based on the voltage value.

[0087] Among them, the voltage change parameter is used to characterize whether the voltage value and the oxygen concentration are positively or negatively correlated.

[0088] Understandably, due to the design characteristics of humidity sensors, there is a minimum threshold for the voltage value they can detect. When the humidity in the heating chamber reaches or approaches this minimum threshold and cannot continue to decrease, the relationship between the voltage value and the oxygen concentration changes from a negative correlation to a positive correlation. Therefore, by analyzing the voltage value, it is possible to further determine whether the relationship between the voltage value and the oxygen concentration is positive or negative, thus allowing for a more accurate determination of the oxygen concentration.

[0089] For example, such as Figure 9 As shown, the humidity sensor detects a voltage value with a minimum threshold of 5V. When the voltage value reaches 5V, the relationship between the voltage value and the oxygen concentration changes from a negative correlation to a positive correlation.

[0090] In some embodiments, the controller can determine voltage change parameters based on the changes in voltage values ​​over multiple consecutive cycles.

[0091] In one example, the controller can determine the voltage change parameters based on the changes in voltage values ​​over two consecutive cycles.

[0092] In addition, the specific procedure for determining voltage variation parameters can be found below. Figure 12 The specific descriptions of the embodiments shown are not repeated here.

[0093] In another example, the controller can determine the voltage change parameters based on the voltage changes over two or more consecutive cycles.

[0094] Understandably, voltage values ​​may fluctuate in complex or unstable environments. By considering voltage changes over two or more cycles, the controller can better identify whether voltage fluctuations represent genuine voltage changes rather than transient noise or interference.

[0095] For example, if the voltage value increases in any two adjacent cycles across four consecutive cycles, then the voltage change parameter is determined to characterize a positive correlation between the voltage value and the oxygen concentration.

[0096] If the voltage value decreases in any two adjacent cycles across four consecutive cycles, then the voltage change parameter is determined to characterize a negative correlation between the voltage value and the oxygen concentration.

[0097] S103. The controller determines the oxygen concentration in the air inside the heating chamber based on the voltage value and voltage change parameters.

[0098] In some embodiments, the controller determines the oxygen concentration based on the correspondence between the voltage value, voltage change parameters, and oxygen concentration, as well as the voltage value.

[0099] In some embodiments, the correspondence between voltage values, voltage change parameters, and oxygen concentration is obtained based on a fitting algorithm.

[0100] like Figure 10 As shown below, the fitting of the correspondence between voltage value, voltage change parameter and oxygen concentration is illustrated by example.

[0101] Step a1: Periodically acquire the oxygen concentration in the air inside the heating chamber and the voltage value detected by the humidity sensor.

[0102] In some embodiments, there is a one-to-one correspondence between the obtained oxygen concentration and voltage value.

[0103] For example, the oxygen concentration in the air inside the heating chamber can be expressed as (O1, O2). 2,… O i… O n The voltage value detected by the humidity sensor can be expressed as (V1, V...). 2, …V i,… V n ).

[0104] Step a2: Using the linear regression fitting algorithm, determine the linear relationship between oxygen concentration and voltage value.

[0105] In some embodiments, a linear relationship between voltage and oxygen concentration can be assumed to be O. i =aV i +b.

[0106] Next, the fitting coefficients a and b are calculated using the linear regression fitting algorithm.

[0107] in,

[0108] Thus, a linear relationship between voltage and oxygen concentration can be obtained, expressed as the following formula (1).

[0109]

[0110] Among them, O i V represents oxygen concentration; i This is the voltage value.

[0111] Step a3: Determine the correspondence between oxygen concentration and voltage value based on the voltage change parameters and the linear relationship between voltage value and oxygen concentration.

[0112] In some embodiments, the relationship between oxygen concentration and voltage value can be expressed as the following formula (2).

[0113]

[0114] Where γ is the voltage change parameter.

[0115] Understandably, since the slope of the above formula (1) can indicate whether the voltage value and oxygen concentration are positively or negatively correlated, and the voltage change parameter is also used to characterize whether the voltage value and oxygen concentration are positively or negatively correlated, the voltage change parameter can be regarded as a component of the slope in the above formula (1). By integrating the voltage change parameter into the slope of formula (1), a new linear relationship can be obtained (i.e., the above formula (2)), which can more accurately describe the correspondence between oxygen concentration and voltage value.

[0116] S104. The controller determines the humidity inside the heating chamber based on the oxygen concentration.

[0117] In some embodiments, the humidity inside the heating chamber can be obtained by the following formula (3).

[0118] H = 1 - O i / 21% formula (3)

[0119] Where H represents the humidity inside the heating chamber, and O i This refers to the oxygen concentration.

[0120] In some embodiments, the correspondence between oxygen concentration and humidity can be pre-stored to form a lookup table. During actual operation, the controller only needs to look up the corresponding humidity in the lookup table based on the current oxygen concentration.

[0121] In some embodiments, low humidity in the heating chamber can affect the cooking effect of the food. To improve the cooking effect, the controller can activate the humidification device to increase the humidity in the heating chamber when the humidity is low.

[0122] For example, if the humidity inside the heating chamber does not reach a preset threshold, it can be determined that the humidity inside the heating chamber is low.

[0123] In some embodiments, high humidity inside the heating chamber can affect the cooking effect of the food. To improve the cooking effect, the controller can activate a dehumidification device to reduce the humidity inside the heating chamber when the humidity inside the heating chamber is high.

[0124] For example, if the humidity inside the heating chamber reaches or exceeds a preset threshold, it can be determined that the humidity inside the heating chamber is relatively high.

[0125] based on Figure 8The illustrated embodiment provides an oven control method according to an exemplary embodiment. This method determines the oxygen concentration in the air within the heating cavity by using the voltage value detected by a humidity sensor and a voltage change parameter characterizing a positive or negative correlation between the voltage value and oxygen concentration. The humidity within the heating cavity is then determined based on the oxygen concentration. Since humidity and oxygen concentration interact in the enclosed environment of an oven, determining humidity through oxygen concentration provides a more comprehensive understanding of the oven's environmental conditions. This approach not only considers the potential influence of oxygen concentration on the humidity sensor but also utilizes oxygen concentration as a correction parameter, improving the accuracy of humidity detection and thus providing more reliable humidity data for the oven.

[0126] To determine the oxygen concentration in the air inside the heating chamber, such as Figure 11 As shown, this application embodiment also provides a method for controlling an oven, including the following steps, that is, step S103 includes the following steps:

[0127] S201, The controller obtains the temperature inside the heating chamber.

[0128] In some embodiments, the controller can acquire the temperature inside the heating cavity via a temperature sensor during the cooking process in the oven.

[0129] S202. The controller determines the temperature correction factor based on the temperature.

[0130] Understandable, such as Figure 12 As shown, the relationship between voltage value and oxygen concentration differs at different temperatures. Therefore, to avoid the influence of temperature on oxygen concentration, a temperature correction factor can be determined to correct the relationship between voltage value and oxygen concentration.

[0131] In some embodiments, researchers can measure the oxygen concentration at different temperatures and record the corresponding voltage values ​​output by the humidity sensor. Then, they can determine the temperature correction factor through data analysis. Next, the correspondence between temperature and the temperature correction factor is pre-set in the oven's control program. During the oven's cooking process, the controller can directly acquire this correspondence and determine the temperature correction factor based on the pre-set correspondence and the temperature.

[0132] For example, the preset correspondence between temperature and temperature correction factor is shown in Table 1 below.

[0133] Table 1

[0134] Temperature (°C) Temperature correction factor σ 120 1.2 130 1.19 140 1.14 150 1.1 160 1 170 0.96 180 0.91 190 0.86 200 0.82 210 0.75

[0135] As shown in Table 1, when the temperature is 170℃, the temperature correction factor can be determined to be 0.96 by querying the preset correspondence between the temperature and the temperature correction factor.

[0136] S203. The controller determines the oxygen concentration in the air inside the heating chamber based on the temperature correction coefficient, voltage value, and voltage change parameters.

[0137] In some embodiments, the oxygen concentration in the air inside the heating chamber can be obtained based on the following formula (4).

[0138] O i =σγaV i +b Formula (4)

[0139] Among them, O i σ is the oxygen concentration in the air inside the heating chamber; σ is the temperature correction factor; γ is the voltage variation parameter; V i denoted as voltage value; a and b are fitting coefficients.

[0140] In some embodiments, a lookup table can be pre-stored to form the correspondence between temperature correction coefficients, voltage values, voltage change parameters, and oxygen concentrations. During actual operation, the controller only needs to look up the corresponding oxygen concentration value in the lookup table based on the current temperature correction coefficients, voltage values, and voltage change parameters.

[0141] To determine voltage variation parameters, such as Figure 13 As shown in the figure, this application embodiment also provides a method for controlling an oven, including the following steps:

[0142] S301. When the voltage value changes between two adjacent cycles and the voltage value increases, the parameter used to characterize the positive correlation between the voltage value and the oxygen concentration is determined as the voltage change parameter.

[0143] Understandably, if the voltage value increases, it is usually because the oxygen concentration has increased between two adjacent cycles. Therefore, when the controller detects an increase in voltage value between two adjacent cycles, this change can be used as a parameter characterizing the positive correlation between the voltage value and the oxygen concentration, i.e., the voltage change parameter.

[0144] S302. When the voltage value decreases between two adjacent cycles, the controller determines the parameter that characterizes the negative correlation between the voltage value and the oxygen concentration as the voltage change parameter.

[0145] Understandably, if the voltage decreases, it's usually because the oxygen concentration has decreased between two adjacent cycles. Therefore, when the controller detects a decrease in voltage between two adjacent cycles, this change can be used as a parameter characterizing the negative correlation between voltage and oxygen concentration—that is, the voltage change parameter.

[0146] The following example illustrates the complete process for determining the humidity inside the oven's heating cavity.

[0147] like Figure 14 As shown, during the experimental phase, the voltage value detected by the humidity sensor and the oxygen concentration can be measured in the oven. Then, a fitting algorithm is used to obtain the correspondence between the voltage value and the oxygen concentration. Next, the correspondence between the voltage value and the oxygen concentration is tested at different oven temperatures. Based on the oven temperature, a temperature correction coefficient is determined.

[0148] In the actual cooking process of the oven, firstly, the voltage value detected by the humidity sensor is acquired. Next, based on the voltage value, the voltage change parameters are determined. Then, based on the voltage change parameters, the temperature correction factor, and the correspondence between the voltage value and the oxygen concentration, the oxygen concentration is determined. Finally, based on the oxygen concentration, the humidity is determined.

[0149] Those skilled in the art will recognize that, in one or more of the examples above, the functions described in this invention can be implemented using hardware, software, firmware, or any combination thereof. When implemented in software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or code on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any medium that facilitates the transfer of a computer program from one place to another. Storage media can be any available medium accessible to a general-purpose or special-purpose computer.

[0150] In this embodiment of the invention, electronic products can be divided into functional modules according to the above method examples. For example, each function can be divided into its own functional module, or two or more functions can be integrated into one processing module. The integrated module can be implemented in hardware or as a software functional module. It should be noted that the module division in this embodiment is illustrative and only represents one logical functional division; other division methods may be used in actual implementation.

[0151] In the case of dividing each function into corresponding functional modules, the embodiments of this application can also provide an oven control device, which may include: an acquisition module and a determination module.

[0152] In some embodiments, the acquisition module is used to acquire the voltage value detected by the humidity sensor.

[0153] In some embodiments, the determining module is configured to determine a voltage change parameter based on the voltage value; the voltage change parameter is used to characterize whether there is a positive or negative correlation between the voltage value and the oxygen concentration.

[0154] In some embodiments, the determining module is further configured to determine the oxygen concentration in the air inside the heating chamber based on the voltage value and the voltage change parameter.

[0155] In some embodiments, the determining module is further configured to determine the humidity within the heating chamber based on the oxygen concentration.

[0156] In the case of using integrated units, the control device may also include a storage module and a communication module.

[0157] In some embodiments, the storage module is used to store the program code and data of the fault detection device. In some embodiments, the communication module may be a transceiver, a transceiver circuit, or a communication interface, etc.

[0158] This application also provides a computer-readable storage medium, which includes computer-executable instructions that, when executed on a computer, cause the computer to perform the method provided in the above embodiments.

[0159] This application also provides a computer program product that can be directly loaded into a memory and contains software code. After being loaded and executed by a computer, the computer program product can implement the methods provided in the above embodiments.

[0160] Through the above description of the embodiments, those skilled in the art can clearly understand that, for the sake of convenience and brevity, only the division of the above functional modules is used as an example. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0161] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An oven, characterized in that, include: The inner liner has an open heating chamber; A humidity sensor is disposed inside the heating chamber, and the humidity sensor is used to detect a voltage value that reflects the humidity inside the heating chamber; The controller is configured as follows: Obtain the voltage value detected by the humidity sensor; The voltage value is obtained periodically based on a preset period, and the voltage value includes the voltage values ​​of two adjacent periods. When the voltage value increases between two adjacent cycles, the parameter used to characterize the positive correlation between the voltage value and the oxygen concentration is determined as the voltage change parameter. When the voltage value decreases between two adjacent cycles, the parameter that characterizes the negative correlation between the voltage value and the oxygen concentration is determined as the voltage change parameter. The oxygen concentration in the air inside the heating chamber is determined based on the voltage value and the voltage change parameter; the correspondence between the voltage value, the voltage change parameter, and the oxygen concentration is obtained based on a fitting algorithm. The humidity inside the heating chamber is determined based on the oxygen concentration.

2. The oven according to claim 1, characterized in that, The controller is configured to determine the oxygen concentration in the air inside the heating chamber based on the voltage value and the voltage change parameter, including: Obtain the temperature inside the heating chamber; Determine the temperature correction factor based on the stated temperature; The oxygen concentration in the air inside the heating chamber is determined based on the temperature correction coefficient, the voltage value, and the voltage change parameter.

3. The oven according to claim 1, characterized in that, The controller is configured to determine the oxygen concentration in the air inside the heating chamber based on the voltage value and the voltage change parameter, including: The oxygen concentration is determined based on the correspondence between the voltage value, the voltage change parameters, and the oxygen concentration, as well as the voltage value.

4. A method for controlling an oven, characterized in that, The method includes: The voltage value detected by the humidity sensor is acquired; the voltage value is acquired periodically based on a preset period, and the voltage value includes the voltage values ​​of two adjacent periods; When the voltage value increases between two adjacent cycles, the parameter used to characterize the positive correlation between the voltage value and the oxygen concentration is determined as the voltage change parameter. When the voltage value decreases between two adjacent cycles, the parameter that characterizes the negative correlation between the voltage value and the oxygen concentration is determined as the voltage change parameter. The oxygen concentration in the air inside the heating chamber is determined based on the voltage value and the voltage change parameter; the correspondence between the voltage value, the voltage change parameter, and the oxygen concentration is obtained based on a fitting algorithm. The humidity inside the heating chamber is determined based on the oxygen concentration.

5. The method according to claim 4, characterized in that, Determining the oxygen concentration in the air inside the heating chamber based on the voltage value and the voltage change parameters includes: Obtain the temperature inside the heating chamber; Determine the temperature correction factor based on the stated temperature; The oxygen concentration in the air inside the heating chamber is determined based on the temperature correction coefficient, the voltage value, and the voltage change parameter.

6. The method according to claim 4, characterized in that, Determining the oxygen concentration in the air inside the heating chamber based on the voltage value and the voltage change parameters includes: The oxygen concentration is determined based on the correspondence between the voltage value, the voltage change parameters, and the oxygen concentration, as well as the voltage value.

Images